CN201310595Y

CN201310595Y - Hydraulic damping device

Info

Publication number: CN201310595Y
Application number: CNU2008202140162U
Authority: CN
Inventors: 钱焱; 庞雷; 罗刚; 郑建中
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2009-09-16
Anticipated expiration: 2018-11-27

Abstract

The utility model relates to a detecting device, in particular to a hydraulic damping device, which comprises a hydraulic cylinder with a piston rod and a piston, a first check valve, a second check valve, a third check valve, a fourth check valve, a transducer and a proportional relief valve. The hydraulic cylinder comprises a first chamber and a second chamber separated by the piston, the first check valve, the second check valve, the third check valve and the fourth check valve are in bridge connection, each joint is connected with two ends of the first chamber, the second chamber and the proportional relief valve. The proportional relief valve generates hydraulic differential between the first chamber and the second chamber, the transducer is arranged at the end portion of the piston rod to detect bearing capacity of the piston rod and feeds detected signals back to the proportional relief valve, thereby correcting the hydraulic differential generated by the proportional relief valve and further increasing control precision of the whole hydraulic damping device.

Description

The hydraulic damping device

[technical field]

The utility model relates to a kind of detection facility, relates in particular to a kind of hydraulic damping device.

[background technique]

In the research and development of industries such as automobile, shipbuilding, oil equipment, mineral products equipment, detection, production, need a kind of device that applies certain load to output terminal, it is a kind of device that fictitious load can be provided, what it adopted usually is the hydraulic damping device, what the hydraulic damping device that exists in the prior art related generally to only is unidirectional hydraulic damping device, it can not carry out two-way loading, simultaneously its control moment, adjustable accuracy aspect are all accurate inadequately, and this has influenced research and development in the above-mentioned industry, detects and produced the process that goes up research greatly.

[model utility content]

The technical problem that the utility model solves is for providing a kind of control accuracy high hydraulic damping device.

In order to address the above problem, the technical solution adopted in the utility model is:

A kind of hydraulic damping device, comprise oil hydraulic cylinder with piston rod and piston, first one-way valve, second one-way valve, the 3rd one-way valve and the 4th one-way valve, described oil hydraulic cylinder comprises first chamber and second chamber of being separated by piston, described first chamber is communicated with the inlet of second one-way valve and the outlet of the 3rd one-way valve, described second chamber is communicated with the inlet of first one-way valve and the outlet of the 4th one-way valve, wherein, described hydraulic damping device also comprise be arranged on the piston rod end be used to detect the sensor of piston rod strength and produce first chamber and second chamber between the proportional pressure control valve of hydraulic difference, described proportional pressure control valve one end is communicated with the outlet of first one-way valve and second one-way valve, the described proportional pressure control valve the other end is communicated with the inlet of the 3rd one-way valve and the 4th one-way valve, described proportional pressure control valve also is connected with described sensor electrical, and the described hydraulic difference of signal correction that obtains according to sensor.

After adopting such structure, owing to be provided with the sensor that detects institute's strength in the end of hydraulic cylinder piston rod, and produce corresponding signal, and signal is passed to proportional pressure control valve, thereby the hydraulic difference that the Comparative Examples relief valve provides is done correction, thereby can realize hydraulic loaded more accurately.

[description of drawings]

Fig. 1 is the principle schematic of the utility model preferred embodiment;

Fig. 2 is a signal relation schematic representation between pull pressure sensor and the proportional pressure control valve;

[embodiment]

In order to make the purpose of this utility model, technological scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Be illustrated in figure 1 as the principle schematic of the hydraulic damping device that the utility model preferred embodiment provides, a kind of hydraulic damping device, comprise oil hydraulic cylinder 1, first one-way valve 21, second one-way valve 22, the 3rd one-way valve 23, the 4th one-way valve 24, proportional pressure control valve 3 and pull pressure sensor 6, described oil hydraulic cylinder 1 has can be in the cylinder airtight piston that is free to slide 13 and is connected piston rod 14 on the piston, described piston rod 14 receives the strength that deceleration loading device (not looking out among the figure) provides, described strength comprises pressure and pulling force, described pull pressure sensor 6 is arranged between deceleration loading device and the piston rod 14, be arranged on the end of piston rod 14 specifically, be used to accurately measure pressure or the pulling force that piston rod 14 is born, described piston 13 is divided into first chamber 11 and second chamber 12 with oil hydraulic cylinder 1, be provided with the hole that can be in communication with the outside on described first chamber 11 and second chamber 12, the no specific (special) requirements such as shape in concrete hole, described first one-way valve 21, second one-way valve 22, the 3rd one-way valve 23 and the 4th one-way valve 24 adopt related domain one-way valve commonly used, refer to that promptly fluid can only be along a direction conducting, can not be along another direction conducting, each one-way valve all has an entrance and exit, fluid can only advance from inlet, and from exporting out, four above-mentioned one-way valve bridge-types connect, concrete, the outlet of the outlet of first one-way valve 21 and second one-way valve 22 is communicated with and all is communicated with an end of proportional pressure control valve 3, the inlet of first one-way valve 21 is communicated with the outlet of the 4th one-way valve 24 and all is communicated with second chamber 12 of oil hydraulic cylinder 1, the inlet of second one-way valve 22 is communicated with the outlet of the 3rd one-way valve 23 and all is communicated with first chamber 11 of oil hydraulic cylinder 1, the inlet of the 3rd one-way valve 23 is communicated with the inlet of the 4th one-way valve 24 and all is communicated with the other end of proportional pressure control valve 3, and described proportional pressure control valve has finally produced the hydraulic difference between first chamber and second chamber.When concrete enforcement, described four one-way valves can adopt independently four one-way valves, also can adopt the current plate of integrated structure, and described current plate can be buied on market, described current plate externally has four terminals, and its concrete Placement is identical with above-mentioned Placement.What look out in the described schematic diagram of Fig. 1 is to link to each other by pipeline, in the specific implementation, can all be integrated in described pipeline on the valve plate, spout and exhaust port also are set on described valve plate, described spout is that whole device carries out fluid injection when initial start-up, in order to realize that liquid is filled with, described exhaust port will carry out exhaust to the gas in former pipeline and the oil hydraulic cylinder 1, described pull pressure sensor 6 is related domain pull pressure sensor commonly used, and the current signal input end 31 of pull pressure sensor 6 passing ratio relief valves 3 is realized reverse feedback.

Described proportional pressure control valve 3 is related domain proportional pressure control valve commonly used, in the present embodiment, proportional pressure control valve 3 is to control by the electrical signal that process control machine sends, the signal that described pull pressure sensor 6 produces plays degenerative effect, and after the electrical signal of the signal of pull pressure sensor 6 and process control machine superposeed, thereby form more accurate control signal, control signal is through electron-amplifier 32, be directly passed to proportional pressure control valve 3 behind the amplification of proportional amplifier 33, thereby control ratio relief valve 3 produces corresponding hydraulic coupling, and described electron-amplifier 32 and proportional amplifier 33 are also used always for related domain.

In order to observe the pressure size of hydraulic pressure in the pipeline, between proportional pressure control valve 3 and the 4th one-way valve 24 inlets, be provided with the pressure gauge 41 of measuring fluid pressure, because the inlet of the 3rd one-way valve 23 and the 4th one-way valve 24 is communicated with, also be equivalent to be arranged between proportional pressure control valve 3 and the 3rd one-way valve 23, can also between proportional

pressure control valve

3 and 22 outlets of second one-way valve, be provided with the pressure gauge 42 of measuring fluid pressure, because pressure gauge is in the measurement state always, the damage of meeting build-up of pressure table, so set up a stop valve (not looking out among the figure) in the joint of pressure gauge and pipeline, thereby can measure the pressure in the management when needed.

The oil hydraulic cylinder that described oil hydraulic cylinder 1 is used always for those skilled in the art, as long as can realize bidirectional-movement, can be the single pole oil hydraulic cylinder, be preferably dual-rod hydraulic cylinder, and the cross-section area of the two-piston bar in this dual-rod hydraulic cylinder equates, because piston rod has occupied the cross-section area of liquid in the cylinder, and the cross-section area size can have influence on the suffered pressure of piston, so the cross-section area of the piston rod on both sides is set to equate, the power at two ends and the purpose of speed equilibrium in the time of can realizing two-way loading.

In the running of whole hydraulic system, may cause the leakage of hydraulic oil.In order to improve the controllable precision of whole system, described hydraulic damping device also comprises accumulator 5, described accumulator 5 is arranged between the inlet of proportional pressure control valve 3 and the 4th one-way valve 24, in the process that oil hydraulic cylinder is loaded, accumulator 5 can be constantly to low-pressure chamber's repairing of oil hydraulic cylinder 1.So when oil hydraulic cylinder 1 is carried out two-way loading, also finished repairing operation to oil hydraulic cylinder 1.

The working procedure of the utility model preferred embodiment is: as shown in Figure 1, when carrying out the forward loading, piston rod 14 moves right, promptly the hydraulic oil in second chamber 12 this moment is compressed, oil pressure raises, thereby driving first one-way valve 21 opens, hydraulic oil arrives proportional pressure control valve 3 through first one-way valve 21, after proportional pressure control valve 3 throttlings, drive the 3rd one-way valve 23 and open, thereby flow to first chamber 11 of oil hydraulic cylinder 1, in this process, the volume of first chamber 11 increases, and oil pressure reduces, and the hydraulic oil in the accumulator 5 then carries out certain replenishing to it; When oppositely loading, piston rod 14 is to left movement, promptly the hydraulic oil in first chamber 11 this moment is compressed, oil pressure raises, thereby driving second one-way valve 22 opens, hydraulic oil arrives proportional pressure control valve 3 through second one-way valve 22, after proportional pressure control valve 3 throttlings, drive the 4th one-way valve 24 and open, thereby flow to second chamber 12 of oil hydraulic cylinder 1, in this process, the volume of second chamber 12 increases, oil pressure reduces, and the hydraulic oil in the accumulator 5 then carries out certain replenishing to it, thereby has improved the precision of whole process, simultaneously owing to increased pull pressure sensor 6 and adopted proportional pressure control valve 3, can well sense the concrete pressure condition of piston rod 14, carry out reverse feedback then, so can more accurately must regulate the size and the precision of power.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the utility model is determined by claims of being submitted to.

Claims

1, a kind of hydraulic damping device, comprise oil hydraulic cylinder with piston rod and piston, first one-way valve, second one-way valve, the 3rd one-way valve and the 4th one-way valve, described oil hydraulic cylinder comprises first chamber and second chamber of being separated by piston, described first chamber is communicated with the inlet of second one-way valve and the outlet of the 3rd one-way valve, described second chamber is communicated with the inlet of first one-way valve and the outlet of the 4th one-way valve, it is characterized in that, described hydraulic damping device also comprise be arranged on the piston rod end be used to detect the sensor of piston rod strength and produce first chamber and second chamber between the proportional pressure control valve of hydraulic difference, described proportional pressure control valve one end is communicated with the outlet of first one-way valve and second one-way valve, the described proportional pressure control valve the other end is communicated with the inlet of the 3rd one-way valve and the 4th one-way valve, described proportional pressure control valve also is connected with described sensor electrical, and the described hydraulic difference of signal correction that obtains according to sensor.

2, hydraulic damping device as claimed in claim 1 is characterized in that, described strength comprises pressure and pulling force, and described sensor is a pull pressure sensor.

3, hydraulic damping device as claimed in claim 2, it is characterized in that, the current signal control that described proportional pressure control valve is produced by process control machine, described pull pressure sensor signal is as the negative-feedback signal of the current signal of described process control machine generation, and the signal after the feedback passes to proportional pressure control valve by electron-amplifier, proportional amplifier after amplifying.

4, hydraulic damping device as claimed in claim 3 is characterized in that, described hydraulic damping device also comprises the pressure gauge that is arranged between proportional pressure control valve and the 4th one-way valve inlet.

5, hydraulic damping device as claimed in claim 3 is characterized in that, described hydraulic damping device also comprises the pressure gauge that is arranged between proportional pressure control valve and the outlet of second one-way valve.

6, hydraulic damping device as claimed in claim 1 is characterized in that, described oil hydraulic cylinder is for having dual-rod hydraulic cylinder, and the cross-section area of two-piston bar equates in the described dual-rod hydraulic cylinder.

7, hydraulic damping device as claimed in claim 1 is characterized in that, described hydraulic damping device also comprises accumulator, and described accumulator is arranged between proportional pressure control valve and the 4th one-way valve inlet.