CN108105207A - Automatically controlled pressure relief mechanism - Google Patents
Automatically controlled pressure relief mechanism Download PDFInfo
- Publication number
- CN108105207A CN108105207A CN201611061348.7A CN201611061348A CN108105207A CN 108105207 A CN108105207 A CN 108105207A CN 201611061348 A CN201611061348 A CN 201611061348A CN 108105207 A CN108105207 A CN 108105207A
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- Prior art keywords
- chamber
- valve
- hydraulic
- fluid pressure
- control unit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of automatically controlled pressure relief mechanism, including：Hydraulic pump；Hydraulic motor；Switch valve；Control unit.The present invention is by setting check valve; right chamber and then oil return box are entered by check valve so that being opened because of the first spool into a left chamber indoor hydraulic oil part; so as to effectively reduce the amount for entering the hydraulic oil in the second fluid pressure line; so as to reduce effectively and in moment the pressure of the hydraulic oil in the second fluid pressure line and hydraulic motor; the second fluid pressure line and hydraulic motor effectively are protected, and reduces noise.
Description
Technical field
The present invention relates to technical field of electromechanical control more particularly to a kind of automatically controlled pressure relief mechanisms.
Background technology
In hydraulic pressure drive control system technology, hydraulic power supply (such as hydraulic pump), hydraulic actuator (such as hydraulic pressure horse are at least needed
Reach or oil cylinder) and control unit (such as hydraulic control valve, such as throttle valve, overflow valve, reversal valve).Wherein, hydraulic pump provides
Hydraulic oil, the pressure and flow direction of the hydraulic oil are controlled by control unit, and hydraulic motor is used to the power of hydraulic oil being converted to machine
Tool power is to realize required function, such as drive hub rotates.Occur a kind of control unit in the prior art, specifically, be
A kind of switch valve, the switch valve are used to that the fluid pressure line between hydraulic pump and hydraulic motor to be made to be turned on or off to control hydraulic pressure
Power source.Switch valve tool is there are one column valve chamber, and be arranged inside main body piston, column valve chamber is divided into two by main body piston
The fluid pressure line of chamber, i.e. left chamber and right chamber, hydraulic pump and hydraulic motor is connected with left chamber, two pipeline by with master
The spool that body piston is fixedly connected is blocked or connected, and spring is provided in right chamber, and spring pushing and pressing main body piston makes spool will
Two pipelines block, wherein, it separates control piper all the way with the fluid pressure line of hydraulic pump connection and is connected with right chamber, the control piper
On be provided with solenoid directional control valve, the solenoid directional control valve have the hydraulic oil of hydraulic pump is made to be passed through the position of right chamber so that hydraulic pressure
For oil pushing and pressing main body piston so that spool blocks two fluid pressure lines, which, which also has, unloads the indoor hydraulic oil of right chamber
Lotus, so that spool open position.
However, above-mentioned switch valve is after opening, the unexpected larger flow of the hydraulic oil that hydraulic pump is provided passes through hydraulic pressure
Pipeline enters hydraulic motor, so as to generate greater impact to hydraulic motor, even damages motor sometimes.
The content of the invention
For above-mentioned technical problem present in existing technology, of the invention implementing, which provides one kind, can solve above-mentioned one
A or Railway Project automatically controlled pressure relief mechanism.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of automatically controlled pressure relief mechanism, including：
Hydraulic pump provides hydraulic oil；
Hydraulic motor is driven by hydraulic oil；
Switch valve, it is interior that there is a valve chamber, moving body is provided in the valve chamber, the moving body is included the valve chamber
It is divided into the main body piston of left chamber and right chamber, is fixedly connected with the main body piston, and positioned at the left chamber indoor the
One spool and the first spring in the right chamber and for pushing against the main body piston is arranged at, the hydraulic pump passes through the
One fluid pressure line is connected with the left chamber, and the hydraulic motor is connected by the second fluid pressure line with the left chamber, described
First spool by being moved to the left with the main body piston first fluid pressure line and second fluid pressure line to be separated,
By moving right to connect first fluid pressure line and the second fluid pressure line with the main body piston；
Control unit, the hydraulic pump are connected by control piper with the right chamber, and described control unit is arranged on institute
State on control piper, and described control unit have make the first position that the hydraulic pump is connected with the left chamber；And tool
Having makes hydraulic pump be disconnected with the left chamber, the second position that the left chamber connects with fuel tank；Wherein
The flow channels for connecting the left chamber and the right chamber are offered on the moving body, in the flow channels
Check valve is provided with, the oil inlet of the check valve is connected with the left chamber, the oil outlet of the check valve and the right chamber
Room connects, wherein, the second spool and second spring are provided in the check valve, second spool is pushed away by the second spring
To so that the hydraulic oil with predetermined pressure opens the check valve；The predetermined pressure is more than the when described control unit
When one spool is in the second position, the pressure of the hydraulic oil in first fluid pressure line.
Preferably, overflow valve is further included, the overflow valve is arranged on the oil return line of described control unit and the fuel tank
On.
Preferably, described control unit is two position, three-way electromagnetic change valve.
Compared with prior art, the advantageous effect of automatically controlled pressure relief mechanism of the invention is：The present invention by setting check valve,
Right chamber and then oil return are entered by check valve so that being opened because of the first spool into a left chamber indoor hydraulic oil part
Case, so as to effectively reduce the amount for entering the hydraulic oil in the second fluid pressure line, so as to reduce effectively and in moment the second liquid
The pressure of hydraulic oil in pressure pipe road and hydraulic motor effectively protects the second fluid pressure line and hydraulic motor, and reduces and make an uproar
Sound.
Description of the drawings
Fig. 1 is the structure diagram of the automatically controlled pressure relief mechanism of the present invention.
In figure：
10- hydraulic pumps；20- switch valves；21- main body pistons；The first spools of 22-；23- left chamber；24- right chambers；25-
One spring；26- second springs；The second spools of 27-；The first fluid pressure lines of 31-；The second fluid pressure lines of 32-；33- control pipers；
40- hydraulic motors；50- fuel tanks；60- control units；70- overflow valves.
Specific embodiment
For those skilled in the art is made to be better understood from technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
Formula elaborates to the present invention.
Before the automatically controlled pressure relief mechanism of the present invention is introduced, introduce first in hydraulic control system of the prior art
The reason for switch valve 20 causes hydraulic motor 40 to be easily damaged.
Such as background technology introduction, after the spool of switch valve 20 is opened, a large amount of hydraulic oil that hydraulic pump 10 provides enter a left side
Chamber 23, this enters hydraulic motor 40 into the hydraulic oil in left chamber 23 is emulative by fluid pressure line, the hydraulic oil into
In the fluid pressure line for entering to connect hydraulic motor 40 so that the pressure rise of fluid pressure line, flow increase, so that hydraulic motor 40
Interior pressure rise, the hydraulic oil of the high pressure easily cause the outer wall of hydraulic motor 40 rupture or to hydraulic motor 40 inside
Parts generate impact, loud noise occur.
It can be seen from the above, generate noise is in hydraulic motor 40 or is connecting hydraulic pressure horse with the reason for damage hydraulic motor 40
The reason for very high pressure is generated up in 40 fluid pressure line, generates high pressure is, after being opened in spool again short time, warp
Switch valve 20 is crossed into the flow increase in fluid pressure line, so that the hydraulic fluid pressure rise in fluid pressure line.
For these reasons, as shown in Figure 1, An embodiment provides a kind of automatically controlled pressure relief mechanism, including：
Hydraulic pump 10, hydraulic motor 40, control unit 60；, the offer hydraulic oil of hydraulic pump 10；Hydraulic motor 40 is driven by hydraulic oil；It opens
Valve 20 is closed, it is interior that there is a valve chamber, moving body is provided in valve chamber, moving body includes valve chamber being divided into left chamber 23 and right chamber
The main body piston 21 of room 24 is fixedly connected with main body piston 21, and the first spool 22 in the left chamber 23 and is arranged at
The first spring 25 in right chamber 24 and for pushing against main body piston 21, hydraulic pump 10 pass through the first fluid pressure line 31 and left chamber
23 connections, hydraulic motor 40 are connected by the second fluid pressure line 32 with left chamber 23, and the first spool 22 passes through with main body piston 21
It is moved to the left so that the first fluid pressure line 31 and the second fluid pressure line 32 to be separated, by moving right with main body piston 21 with by
One fluid pressure line 31 is connected with the second fluid pressure line 32；Control unit 60, hydraulic pump 10 pass through control piper 33 and right chamber 24
Connection, control unit 60 is arranged on control piper 33, and control unit 60 has makes what hydraulic pump 10 was connected with left chamber 23
First position；And having makes hydraulic pump 10 be disconnected with left chamber 23, the second position that left chamber 23 connects with fuel tank 50；Its
In, the flow channels for connecting left chamber 23 and right chamber 24 are offered on moving body, are provided with check valve in flow channels, unidirectionally
The oil inlet of valve is connected with left chamber 23, and the oil outlet of check valve is connected with right chamber 24, wherein, second is provided in check valve
Spool 27 and second spring 26, the second spool 27 is pushed against by second spring 26 so that the hydraulic oil with predetermined pressure makes check valve
It opens；Predetermined pressure is more than when the first spool 22 of control unit 60 is in the second position, the liquid in the first fluid pressure line 31
The pressure of pressure oil.
It should explain：Above-mentioned " predetermined pressure " specifically makes finger check valve default so that the second spool 27 of check valve
The pressure of opening, the value of the predetermined pressure are more than when the first spool 22 of control unit 60 is in the second position, the first hydraulic pressure
The pressure of hydraulic oil in pipeline 31, but be less than when the first spool 22 of control unit 60 is in first position, left chamber 23
Interior pressure, so that the hydraulic oil in left chamber 23 can open the second spool 27.
In this way, when control unit 60 is in the second position, the hydraulic oil and the first spring 25 in right chamber 24 are to main body
The pressure of piston 21 is more than in left chamber 23 that hydraulic oil is to the pressure of main body piston 21, so that the first spool 22 blocks the first hydraulic pressure
31 and second fluid pressure line 32 of pipeline.When control unit 60 is switched to first position from the second position, the liquid in left chamber 23
For pressure oil through 60 oil return box 50 of control unit, the hydraulic oil in left chamber 23 is more than liquid in right chamber 24 to the pressure of main body piston 21
Pressure oil is to 21 pressure of main body piston and the first spring 25 to the pressure of main body piston 21, and the first spool 22 is opened so that the first liquid
Pressure pipe road 31 is connected with the second fluid pressure line 32, in the first spool 22 so that the first fluid pressure line 31 and the second fluid pressure line 32 connect
When logical, a large amount of hydraulic oil enter left chamber 23 so that the pressure rise of left chamber 23, so as to push against the second spool 27 compression second
Spring 26, so that the second spool 27 is opened so that the hydraulic oil part in left chamber 23 enters right chamber 24, and by right chamber
60 oil return box 50 of room 24 and control unit, so as to the flow of the less hydraulic oil into the second fluid pressure line 32 so that second
Hydraulic oil ramp-up rate and rise in fluid pressure line 32 is not too large, so as to reduce hydraulic oil to the second fluid pressure line 32
With the impact into the hydraulic motor 40 after hydraulic motor 40.
The present invention is by setting check valve, so that because the first spool 22 opens the hydraulic oil one into left chamber 23
Part enters right chamber 24 and then oil return box 50 by check valve, so as to effectively reduce the liquid entered in the second fluid pressure line 32
The amount of pressure oil, so as to effectively and the pressure of the second fluid pressure line 32 and the hydraulic oil in hydraulic motor 40 is reduced in moment, have
Effect protects the second fluid pressure line 32 and hydraulic motor 40, and reduces noise.
As further preferred, automatically controlled pressure relief mechanism, further include overflow valve 70, overflow valve 70 be arranged on control unit 60 with
On the oil return line of fuel tank 50.The overflow valve 70 is used to making the hydraulic oil of the hydraulic oil of oil return in other words in right chamber 24 with certain
Pressure oil return box 50.
For convenience of automatically controlled control unit 60, control unit 60 is two position, three-way electromagnetic change valve.Pass through the controllable control that is powered
Unit 60 processed switches between the first position and the second position.
Above example is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can make the present invention respectively in the essence and protection domain of the present invention
Kind modification or equivalent substitution, this modification or equivalent substitution also should be regarded as being within the scope of the present invention.
Claims (3)
1. a kind of automatically controlled pressure relief mechanism, which is characterized in that including：
Hydraulic pump provides hydraulic oil；
Hydraulic motor is driven by hydraulic oil；
Switch valve, it is interior that there is a valve chamber, moving body is provided in the valve chamber, the moving body includes splitting the valve chamber
It is fixedly connected into the main body piston of left chamber and right chamber, with the main body piston, and positioned at indoor first valve of the left chamber
Core and the first spring in the right chamber and for pushing against the main body piston is arranged at, the hydraulic pump passes through the first liquid
Pressure pipe road is connected with the left chamber, and the hydraulic motor is connected by the second fluid pressure line with the left chamber, and described first
Spool is passed through by being moved to the left with the main body piston first fluid pressure line and second fluid pressure line to be separated
It moves right to connect first fluid pressure line and the second fluid pressure line with the main body piston；
Control unit, the hydraulic pump are connected by control piper with the right chamber, and described control unit is arranged on the control
Tubulation road, and described control unit have make the first position that the hydraulic pump is connected with the left chamber；And with making
Hydraulic pump is disconnected with the left chamber, the second position that the left chamber connects with fuel tank；Wherein
The flow channels for connecting the left chamber and the right chamber are offered on the moving body, are set in the flow channels
There is check valve, the oil inlet of the check valve is connected with the left chamber, and the oil outlet of the check valve connects with the right chamber
It is logical, wherein, be provided with the second spool and second spring in the check valve, second spool by the second spring push against with
Make to have the hydraulic oil of predetermined pressure to open the check valve；The predetermined pressure is more than the first valve when described control unit
When core is in the second position, the pressure of the hydraulic oil in first fluid pressure line.
2. automatically controlled pressure relief mechanism according to claim 1, which is characterized in that further include overflow valve, the overflow valve is set
On the oil return line of described control unit and the fuel tank.
3. automatically controlled pressure relief mechanism according to claim 1, which is characterized in that described control unit is changed for two-position three-way electromagnetic
To valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061348.7A CN108105207A (en) | 2016-11-25 | 2016-11-25 | Automatically controlled pressure relief mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061348.7A CN108105207A (en) | 2016-11-25 | 2016-11-25 | Automatically controlled pressure relief mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108105207A true CN108105207A (en) | 2018-06-01 |
Family
ID=62205366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611061348.7A Pending CN108105207A (en) | 2016-11-25 | 2016-11-25 | Automatically controlled pressure relief mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108105207A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5188850A (en) * | 1990-07-27 | 1993-02-23 | Nissie Jushi Kogyo K.K. | Clamping apparatus for molding machine |
| JPH07269507A (en) * | 1994-03-30 | 1995-10-17 | Furukawa Co Ltd | Accelerating device for hydraulic cylinder |
| CN2876397Y (en) * | 2005-08-08 | 2007-03-07 | 上海佩纳·斯凯特机械有限公司 | Single cord remote control controllable oil cylinder device for clamp bucket starting travel |
| CN101387309A (en) * | 2007-09-14 | 2009-03-18 | 沃尔沃建造设备控股（瑞典）有限公司 | Flow control apparatus for heavy construction equipment |
| CN103362889A (en) * | 2012-04-05 | 2013-10-23 | 普霖国际股份有限公司 | Adjustment-free buffering air cylinder |
| CN203500143U (en) * | 2013-10-11 | 2014-03-26 | 山东法因数控机械股份有限公司 | Hydraulic control system of hydraulic shearing machine tool |
| CN105508324A (en) * | 2015-09-17 | 2016-04-20 | 浙江大学宁波理工学院 | Hydraulic vibration type high-power wave generation system and control method thereof |
| CN105539132A (en) * | 2015-12-16 | 2016-05-04 | 徐州重型机械有限公司 | Dual-power drive system, engineering machinery vehicle and control method |
-
2016
- 2016-11-25 CN CN201611061348.7A patent/CN108105207A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5188850A (en) * | 1990-07-27 | 1993-02-23 | Nissie Jushi Kogyo K.K. | Clamping apparatus for molding machine |
| JPH07269507A (en) * | 1994-03-30 | 1995-10-17 | Furukawa Co Ltd | Accelerating device for hydraulic cylinder |
| CN2876397Y (en) * | 2005-08-08 | 2007-03-07 | 上海佩纳·斯凯特机械有限公司 | Single cord remote control controllable oil cylinder device for clamp bucket starting travel |
| CN101387309A (en) * | 2007-09-14 | 2009-03-18 | 沃尔沃建造设备控股（瑞典）有限公司 | Flow control apparatus for heavy construction equipment |
| CN103362889A (en) * | 2012-04-05 | 2013-10-23 | 普霖国际股份有限公司 | Adjustment-free buffering air cylinder |
| CN203500143U (en) * | 2013-10-11 | 2014-03-26 | 山东法因数控机械股份有限公司 | Hydraulic control system of hydraulic shearing machine tool |
| CN105508324A (en) * | 2015-09-17 | 2016-04-20 | 浙江大学宁波理工学院 | Hydraulic vibration type high-power wave generation system and control method thereof |
| CN105539132A (en) * | 2015-12-16 | 2016-05-04 | 徐州重型机械有限公司 | Dual-power drive system, engineering machinery vehicle and control method |
Non-Patent Citations (1)
| Title |
|---|
| 姜继海: "《液压传动》", 31 January 2015, 哈尔滨工业大学出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180601 |