CN112983930A - Underwater single-action electro-hydraulic actuator and actuating method - Google Patents
Underwater single-action electro-hydraulic actuator and actuating method Download PDFInfo
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- CN112983930A CN112983930A CN202110168966.6A CN202110168966A CN112983930A CN 112983930 A CN112983930 A CN 112983930A CN 202110168966 A CN202110168966 A CN 202110168966A CN 112983930 A CN112983930 A CN 112983930A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000008676 import Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000013535 sea water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/008—Enclosed motor pump units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/08—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
Abstract
The invention relates to an underwater single-action electro-hydraulic actuator and an actuating method thereof, and the underwater single-action electro-hydraulic actuator comprises a shell, wherein the shell comprises an oil cylinder barrel, a motor shell and a gear pump assembly; be equipped with in the motor end cover with driving motor output shaft engaged's gear wheel, be equipped with first pump gear in the gear pump casing, coaxial transmission between gear wheel, the first pump gear, still be equipped with second pump gear in the gear pump casing, second pump gear and first pump gear meshing transmission are equipped with gear pump import, gear pump export on the bearing frame. The invention adopts a hydraulic pump direct control mode, and cancels a hydraulic valve and a pipeline in a conventional actuator, so that the structure of the electro-hydraulic actuator is more compact and simpler. The elastic bag can compensate pressure; the invention realizes the purpose of replacing a valve box and a pipeline by reducing the pressure of the rodless cavity and utilizing the ambient water pressure to retract the oil cylinder.
Description
Technical Field
The invention relates to the technical field of hydraulic elements of an underwater hydraulic system, in particular to an underwater single-action electro-hydraulic actuator and an actuating method.
Background
The hydraulic system has the advantages of strong bearing capacity, high power density, convenient speed regulation and the like, and is widely applied to deep sea resource development. The hydraulic system has a plurality of pipelines, and one broken point can cause all the systems to be incapable of operating. Compared with the prior art, the underwater electro-hydraulic actuator has great advantages and is independent from each other. The system has simple structure, no complex pipeline, high integration level and convenient miniaturization of underwater equipment.
Compared with the traditional hydraulic system, the electro-hydraulic actuator has various advantages and is widely applied to the field of airplanes. The electro-hydraulic actuator is provided with various components of a hydraulic system, including an oil tank, a hydraulic pump, a valve box, a pipeline and an executing element. However, in underwater hydraulic systems, particularly deep sea, pressure compensation is required to improve system efficiency. In particular, in a valve box, the electronic components need to be pressure compensated by oil, which can cause the electro-hydraulic actuator to be not compact.
Disclosure of Invention
The underwater single-acting electro-hydraulic actuator adopts a pump control mode, an oil pump directly supplies high-pressure oil to a rodless cavity to push a piston rod to extend out, then a motor rotates reversely, the oil pump absorbs oil from the rodless cavity, the pressure of the rodless cavity is reduced, a piston retracts under the action of ambient pressure, retraction is realized through the underwater pressure, and the structure of the electro-hydraulic actuator is simplified.
The technical scheme adopted by the invention is as follows:
an underwater single-action electro-hydraulic actuator comprises an oil cylinder body, a motor shell, a gear pump component fixedly arranged between the oil cylinder body and the motor shell,
a piston is arranged in the oil cylinder barrel body,
a motor end cover is arranged at one end of the motor shell facing the gear pump component, a driving motor is fixedly arranged on the motor end cover, an elastic bag is fixedly arranged at one end of the motor shell opposite to the gear pump component, a watertight cable is arranged on the motor shell,
the gear pump assembly comprises a gear pump shell fixedly mounted with the oil cylinder barrel, and a bearing seat is connected and mounted between the motor end cover and the gear pump shell; a speed reducing wheel meshed with an output shaft of the driving motor is arranged in the motor end cover, a first pump gear is arranged in the gear pump shell, the speed reducing wheel and the first pump gear are coaxially driven, a second pump gear is also arranged in the gear pump shell and is meshed with the first pump gear for driving,
be equipped with the gear pump import on the bearing frame, gear pump import intercommunication motor casing inner chamber and gear pump casing inner chamber, be equipped with the gear pump export on the gear pump casing, gear pump export intercommunication gear pump casing inner chamber and oil cylinder barrel body inner chamber.
The mouth of the motor shell is correspondingly provided with a pressing plate and a bolt for locking the pressing plate, and a gap for clamping the edge of the elastic bag is reserved between the pressing plate and the mouth of the motor shell.
A transmission shaft is connected between the speed reducing wheel and the first pump gear, a bearing is sleeved on the transmission shaft, and the bearing is embedded into the bearing seat.
And one end of the transmission shaft embedded in the gear pump shell is correspondingly provided with a bearing.
And two ends of a gear shaft of the second pump gear are respectively embedded into the bearing block and the gear pump shell, and two ends of the gear shaft are correspondingly provided with bearings.
And a safety valve is arranged on the bearing seat.
And a pressure sensor is arranged on the gear pump shell.
And a sealing ring is arranged between the piston and the oil cylinder barrel body, and a sealing ring is arranged between the oil cylinder barrel body and the gear pump shell body.
An actuating method by using an underwater single-action electro-hydraulic actuator comprises the following steps:
the watertight cable is connected with an external controller to control the driving motor to rotate in the forward direction or the reverse direction,
firstly, driving a motor to rotate positively: the output shaft of the driving motor drives the speed reducing wheel to rotate forwards, the gear pump assembly absorbs oil through the inlet of the gear pump and discharges oil from the outlet of the gear pump to the oil cylinder barrel body, and at the moment, water in a cavity on one side of the oil cylinder barrel body, which is far away from the gear pump assembly, is discharged outwards; in the process, the pressure sensor keeps a detection state, the leakage amount is tested, the external controller monitors the output value of the pressure sensor to control the rotating speed of the driving motor,
secondly, driving a motor to rotate reversely: the gear pump outlet sucks oil in the rodless cavity back and conveys the oil back into the motor shell through the gear pump inlet, so that the internal pressure in the rodless cavity is reduced, and the piston rod retracts under the action of external environment pressure.
The invention has the following beneficial effects:
the electro-hydraulic actuator has compact and reasonable structure and convenient operation, adopts a hydraulic pump direct control mode, and cancels a hydraulic valve and a pipeline in a conventional actuator, so that the electro-hydraulic actuator has more compact and simpler structure.
Most of conventional oil cylinders are in one-way heavy load in the actual use process, and the high-pressure oil is reversed only for retracting the piston rod. The motor shell serves as an oil tank, the tail part of the oil tank is connected with the elastic bag, and pressure compensation can be performed under the influence of water pressure in a deep sea environment; the invention realizes the purpose of replacing a valve box and a pipeline by reducing the pressure of the rodless cavity and utilizing the ambient water pressure to retract the oil cylinder.
The rod cavity of the oil tank is directly communicated with the outside without a pipeline, so that the whole structure is more compact. The speed reducing wheel is additionally arranged between the driving motor and the gear pump assembly, so that the control precision of the output flow of the gear pump can be greatly improved, and the control precision of the position of the oil cylinder is improved.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is an enlarged view of a portion a of fig. 1 for showing a locking structure of the elastic bag.
Fig. 3 is a top view of the present invention.
Fig. 4 is a sectional view B-B of fig. 1.
Wherein: 1. an elastic bag; 2. a bolt; 3. pressing a plate; 4. a motor housing; 5. a drive motor; 6. a motor end cover; 7. a speed reducing wheel; 8. a bearing seat; 9. a first pump gear; 10. a cylinder barrel; 11. a seal ring; 12. a piston; 13. a piston rod; 14. a nut; 15. a gear pump housing; 16. a bearing;
17. a second pump gear; 18. a drive shaft; 19. an output shaft; 20. a pressure sensor; 21. a safety valve;
22. a watertight cable; 23. a gear pump inlet; 24. the gear pump outlet.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1-4, the underwater single-acting electro-hydraulic actuator of the embodiment comprises an oil cylinder body 10, a motor housing 4, a gear pump assembly fixedly arranged between the oil cylinder body 10 and the motor housing 4,
a piston 12 is arranged in the cylinder body 10, and a piston rod 13 is arranged at the circle center position of the piston 12;
a motor end cover 6 is arranged at one end of the motor shell 4 facing the gear pump component, a driving motor 5 is fixedly arranged on the motor end cover 6, an elastic bag 1 is fixedly arranged at one end of the motor shell 4 departing from the gear pump component, a watertight cable 22 is arranged on the motor shell 4,
the gear pump assembly comprises a gear pump shell 15 fixedly mounted with the oil cylinder barrel 10, and a bearing block 8 is connected and mounted between the motor end cover 6 and the gear pump shell 15; a speed reducing wheel 7 meshed with an output shaft 19 of the driving motor 5 is arranged in the motor end cover 6, a first pump gear 9 is arranged in the gear pump shell 15, the speed reducing wheel 7 and the first pump gear 9 are coaxially driven, a second pump gear 17 is also arranged in the gear pump shell 15, the second pump gear 17 is meshed with the first pump gear 9 for driving,
be equipped with gear pump import 23 on the bearing frame 8, gear pump import 23 intercommunication motor casing 4 inner chambers and the 15 inner chambers of gear pump casing, be equipped with gear pump export 24 on the gear pump casing 15, gear pump export 24 intercommunication gear pump casing 15 inner chambers and the 10 inner chambers of oil cylinder barrel.
The mouth part of the motor shell 4 is correspondingly provided with a pressing plate 3 and a bolt 2 for locking the pressing plate 3, and a gap for clamping the edge of the elastic bag 1 is reserved between the pressing plate 3 and the mouth part of the motor shell 4.
A transmission shaft 18 is connected between the reduction gear 7 and the first pump gear 9, a bearing 16 is sleeved on the transmission shaft 18, and the bearing 16 is embedded into the bearing seat 8.
The bearing 16 is correspondingly arranged at one end of the transmission shaft 18 embedded in the gear pump shell 15.
Two ends of a gear shaft of the second pump gear 17 are respectively embedded into the bearing block 8 and the gear pump shell 15, and two ends of the gear shaft are correspondingly provided with bearings 16.
The bearing seat 8 is provided with a safety valve 21.
The gear pump housing 15 is provided with a pressure sensor 20.
A sealing ring 11 is arranged between the piston 12 and the oil cylinder barrel 10, and a sealing ring 11 is arranged between the oil cylinder barrel 10 and the gear pump shell 15.
The actuating method by using the underwater single-action electro-hydraulic actuator comprises the following steps:
the watertight cable 22 is connected with an external controller to control the driving motor 5 to rotate in the forward direction, the output shaft 19 of the driving motor 5 drives the speed reducing wheel 7 to rotate in the forward direction, the gear pump assembly absorbs oil through the gear pump inlet 23 and discharges oil from the gear pump outlet 24 to the oil cylinder barrel 10, and at the moment, water in a cavity on one side of the oil cylinder barrel 10, which is far away from the gear pump assembly, is discharged outwards; in the above process, the pressure sensor 20 keeps the detection state, the leakage amount is tested, and the external controller monitors the output value of the pressure sensor 20 to control the rotating speed of the driving motor 5.
The concrete structure and the working principle of the invention are as follows:
as shown in fig. 1 and 3, the motor housing 4, the gear pump assembly, and the oil cylinder barrel 10 are coaxially arranged, and the outer circumferential contour is located on the same cylindrical surface. The cylinder barrel 10 is divided into a rodless cavity and a rod cavity, the rod cavity is a cavity on one side, away from the gear pump assembly, in the cylinder barrel 10, and the opening is formed, so that outside seawater can enter the rod cavity. The rodless cavity, the gear pump assembly and the motor housing 4 are communicated, and oil in the motor housing 4 serving as an oil tank can flow among the rodless cavity, the gear pump assembly and the motor housing 4 to push the piston 12 to move.
When the axis of the actuator is horizontally arranged, the watertight cable 22 is arranged on the side wall of the motor shell 4 and is connected with the driving motor 5 as shown in figure 3; a safety valve 21 is arranged on the bearing seat 8, and the safety valve 21 and the gear pump inlet 23 are respectively positioned on two sides of the bearing seat 8. The side wall of the gear pump shell 15 is provided with a pressure sensor 20 which is arranged at the same side with the watertight cable 22.
When the actuator is started, a watertight cable 22 connected with an external controller is communicated with the driving motor 5 to control the driving motor 5 to rotate forwards, an output shaft 19 of the driving motor 5 is meshed with the speed reducing wheel 7 to drive the speed reducing wheel 7 to rotate, the diameter of the speed reducing wheel 7 is larger, the rotating speed is reduced after being output by the speed reducing wheel 7 and is transmitted to the coaxial first pump gear 9, the first pump gear 9 drives the second pump gear 17 with the same diameter, the rotating speed is not changed to output, after the gear pump assembly operates, oil in the motor shell 4 is sucked in through the gear pump inlet 23 and then is output from the gear pump outlet 24 and is output to the rodless cavity, the piston 12 is pushed outwards, and seawater in the rod cavity is discharged.
At the mouth of the rod cavity, a locking nut 14 is also provided.
The leakage amount of the gear pump under different pressures can be measured through a plurality of groups of tests, and the controller monitors the pressure of the pressure sensor 20 to control the rotating speed of the motor. Under the effect of speed reducer, the gear pump rotational speed reduces, and the motor can more accurately control the flow of gear pump to accurate control cylinder position, output thrust.
When the motor rotates reversely, the gear pump outlet 24 sucks oil in the rodless cavity back, and the oil is conveyed back into the motor shell 4 through the gear pump inlet 23, so that the internal pressure in the rodless cavity is reduced, and the piston 12 retracts under the action of external environment pressure. During the retraction of the cylinder, there cannot be a large load. According to the underwater single-action electro-hydraulic actuator, the rod cavity of the oil cylinder is communicated with the environment, so that deep sea self-retraction can be realized.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (9)
1. An underwater single-acting electro-hydraulic actuator, characterized in that: comprises an oil cylinder body (10), a motor shell (4) and a gear pump assembly fixedly arranged between the oil cylinder body (10) and the motor shell (4), wherein a piston (12) is arranged in the oil cylinder body (10),
a motor end cover (6) is arranged at one end of the motor shell (4) facing the gear pump component, a driving motor (5) is fixedly arranged on the motor end cover (6), an elastic bag (1) is fixedly arranged at one end of the motor shell (4) departing from the gear pump component, a watertight cable (22) is arranged on the motor shell (4),
the gear pump assembly comprises a gear pump shell (15) fixedly mounted with the oil cylinder barrel (10), and a bearing seat (8) is connected and mounted between the motor end cover (6) and the gear pump shell (15); a speed reducing wheel (7) meshed with an output shaft (19) of the driving motor (5) is arranged in the motor end cover (6), a first pump gear (9) is arranged in a gear pump shell (15), the speed reducing wheel (7) and the first pump gear (9) are in coaxial transmission, a second pump gear (17) is further arranged in the gear pump shell (15), the second pump gear (17) is in meshed transmission with the first pump gear (9),
be equipped with gear pump import (23) on bearing frame (8), gear pump import (23) intercommunication motor casing (4) inner chamber and gear pump casing (15) inner chamber, be equipped with gear pump export (24) on gear pump casing (15), gear pump export (24) intercommunication gear pump casing (15) inner chamber and cylinder barrel (10) inner chamber.
2. An underwater single-acting electro-hydraulic actuator as claimed in claim 1, wherein: the motor shell (4) is provided with a pressing plate (3) and a bolt (2) for locking the pressing plate (3) at the opening, and a gap for clamping the edge of the elastic bag (1) is reserved between the pressing plate (3) and the motor shell (4) at the opening.
3. An underwater single-acting electro-hydraulic actuator as claimed in claim 1, wherein: a transmission shaft (18) is connected between the speed reducing wheel (7) and the first pump gear (9), a bearing (16) is sleeved on the transmission shaft (18), and the bearing (16) is embedded into the bearing seat (8).
4. A submersible single-acting electro-hydraulic actuator as defined in claim 3, wherein: one end of the transmission shaft (18) embedded in the gear pump shell (15) is correspondingly provided with a bearing (16).
5. An underwater single-acting electro-hydraulic actuator as claimed in claim 1, wherein: and two ends of a gear shaft of the second pump gear (17) are respectively embedded into the bearing seat (8) and the gear pump shell (15), and two ends of the gear shaft are correspondingly provided with bearings (16).
6. An underwater single-acting electro-hydraulic actuator as claimed in claim 1, wherein: and a safety valve (21) is arranged on the bearing seat (8).
7. An underwater single-acting electro-hydraulic actuator as claimed in claim 1, wherein: and a pressure sensor (20) is arranged on the gear pump shell (15).
8. An underwater single-acting electro-hydraulic actuator as claimed in claim 1, wherein: a sealing ring (11) is arranged between the piston (12) and the oil cylinder body (10), and a sealing ring (11) is arranged between the oil cylinder body (10) and the gear pump shell (15).
9. A method of operating a submersible single-acting electro-hydraulic actuator as defined in claim 1, comprising the steps of:
the watertight cable (22) is connected with an external controller to control the driving motor (5) to rotate forward or reversely,
firstly, driving a motor (5) to rotate positively: an output shaft (19) of the driving motor (5) drives the speed reducing wheel (7) to rotate forwards, the gear pump assembly absorbs oil through a gear pump inlet (23), oil is discharged from a gear pump outlet (24) to the oil cylinder barrel body (10), and at the moment, water in a cavity on one side, away from the gear pump assembly, in the oil cylinder barrel body (10) is discharged outwards; in the process, the pressure sensor (20) keeps a detection state, the leakage amount is tested, an external controller monitors the output value of the pressure sensor (20) to control the rotating speed of the driving motor (5),
secondly, driving the motor (5) to rotate reversely: the gear pump outlet (24) sucks oil in the rodless cavity back, and the oil is conveyed back into the motor shell (4) through the gear pump inlet (23), so that the internal pressure in the rodless cavity is reduced, and the piston rod (13) retracts under the action of external environment pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168966.6A CN112983930A (en) | 2021-02-07 | 2021-02-07 | Underwater single-action electro-hydraulic actuator and actuating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168966.6A CN112983930A (en) | 2021-02-07 | 2021-02-07 | Underwater single-action electro-hydraulic actuator and actuating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112983930A true CN112983930A (en) | 2021-06-18 |
Family
ID=76348971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110168966.6A Pending CN112983930A (en) | 2021-02-07 | 2021-02-07 | Underwater single-action electro-hydraulic actuator and actuating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112983930A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807901A (en) * | 2005-01-19 | 2006-07-26 | Kayaba工业株式会社 | Hydraulic controller and hydraulic drive unit provided with said hydraulic controller |
| US20170146035A1 (en) * | 2014-06-02 | 2017-05-25 | Project Phoenix, LLC | Linear actuator assembly and system |
| CN109356906A (en) * | 2018-12-04 | 2019-02-19 | 北京科技大学 | A kind of integrated electric hydraulic actuator can be used for underwater operation |
| CN111852982A (en) * | 2020-07-13 | 2020-10-30 | 南京理工大学 | Integrated radiating pump-controlled hydraulic cylinder |
-
2021
- 2021-02-07 CN CN202110168966.6A patent/CN112983930A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807901A (en) * | 2005-01-19 | 2006-07-26 | Kayaba工业株式会社 | Hydraulic controller and hydraulic drive unit provided with said hydraulic controller |
| US20170146035A1 (en) * | 2014-06-02 | 2017-05-25 | Project Phoenix, LLC | Linear actuator assembly and system |
| CN109356906A (en) * | 2018-12-04 | 2019-02-19 | 北京科技大学 | A kind of integrated electric hydraulic actuator can be used for underwater operation |
| CN111852982A (en) * | 2020-07-13 | 2020-10-30 | 南京理工大学 | Integrated radiating pump-controlled hydraulic cylinder |
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Application publication date: 20210618 |