CN109281877B - A kind of high pressure accumulator and its control method - Google Patents

A kind of high pressure accumulator and its control method Download PDF

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Publication number
CN109281877B
CN109281877B CN201811516162.5A CN201811516162A CN109281877B CN 109281877 B CN109281877 B CN 109281877B CN 201811516162 A CN201811516162 A CN 201811516162A CN 109281877 B CN109281877 B CN 109281877B
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CN
China
Prior art keywords
way electromagnetic
electromagnetic change
pressure
change valve
valve
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CN201811516162.5A
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Chinese (zh)
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CN109281877A (en
Inventor
王建涛
赵小龙
李亚航
林华文
杨皓仁
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燕山大学
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Priority to CN201811516162.5A priority Critical patent/CN109281877B/en
Publication of CN109281877A publication Critical patent/CN109281877A/en
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Publication of CN109281877B publication Critical patent/CN109281877B/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/04Accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021Valves for interconnecting the fluid chambers of an actuator

Abstract

The invention discloses a kind of high pressure accumulator and its control methods.The high pressure accumulator includes main accumulator, auxiliary accumulator, hydraulic pump, motor, check valve, safety valve, two position, three-way electromagnetic change valve group, first pressure converter, second pressure converter, displacement sensor, shut-off valve, controller etc.;Controller judges accumulator filling liquid and tapping situation by the displacement of acquisition hydraulic cylinder group piston rod, when the of short duration filling liquid of accumulator system or tapping, by controlling electromagnetic switch valve group, the first converter is made to work independently;When accumulator system continues filling liquid or tapping, by controlling electromagnetic switch valve group, the first and second pressure converters is worked alternatively, realize that accumulator continues filling liquid or tapping.The present invention reduces the size of hydraulic cylinder while increasing accumulator volume, and structure is simple, at low cost, easy to control.

Description

A kind of high pressure accumulator and its control method

Technical field

The present invention relates to hydraulic drive fields, more particularly to a kind of high pressure accumulator and its control method.

Background technique

With the development of hydraulic transmission technology, high pressure, Mass flow system be widely used in industrial equipment, engineering machinery with And military field.Accumulator played in hydraulic system energy storage, damping, Absorbing Fluctuation, as functions such as emergency power sources, greatly Hydraulic system performance is improved greatly.With the development of high pressure, large-flow hydraulic system, high pressure accumulator design and application technology are not It is disconnected to make progress, it has also become important Hydraulic Elements in high-pressure system;However for medium low pressure system, it is applied to height Press system regions high pressure accumulator design material, leakproofness, bulk strength, in terms of propose requirements at the higher level, because This considerably increases the designing technique difficulty and production cost of high pressure accumulator.

It is typically used to high pressure using to top hydraulic cylinder rodless cavity rod areas difference to change the booster of oil liquid pressure The design of accumulator, thinking are to connect normal pressure accumulator with booster low-pressure end rodless cavity, booster high-voltage end rodless cavity It is connect with system.For such design scheme there are a larger problem, i.e. actual capacity of an accumulator is smaller, because of intensifier hydraulic The stroke limiting of the cylinder piston rod effective filling liquid of accumulator or tapping volume, such accumulator can not be applied to the big stream of high pressure Occasion is measured, it is full that sufficient oil liquid possibly can not be provided when especially as auxiliary or emergency power source in large-flow hydraulic system Sufficient executing agency.If increasing the available capacity of high pressure accumulator, cylinder design by the stroke for increasing hydraulic cylinder Size will increase, and especially the design size of high-pressure hydraulic cylinder increases, and will greatly improve the cost of product, and increase this kind of height The occupied area for pressing accumulator system, limits its application occasion.

Summary of the invention

The object of the present invention is to provide a kind of high pressure accumulator and its control methods, are caused with solving accumulator volume increase The big problem of hydraulic cylinder size.

To achieve the above object, the present invention provides following schemes:

A kind of high pressure accumulator, comprising: main accumulator, auxiliary accumulator, hydraulic pump, motor, check valve, safety valve, One two position, three-way electromagnetic change valve group, the second two position, three-way electromagnetic change valve group, first pressure converter, second pressure conversion Device, the first displacement sensor, second displacement sensor, the first shut-off valve, the second shut-off valve, third shut-off valve and controller; The first pressure converter includes the first low-pressure hydraulic cylinder and the first high-pressure hydraulic cylinder;The second pressure converter includes Second low-pressure hydraulic cylinder and the second high-pressure hydraulic cylinder;The first two position, three-way electromagnetic change valve group includes the first two-position three way Solenoid directional control valve, the second two position, three-way electromagnetic change valve, third two position, three-way electromagnetic change valve, the commutation of the 4th two-position three-way electromagnetic Valve and the 5th two position, three-way electromagnetic change valve;The second two position, three-way electromagnetic change valve group includes the 6th two-position three-way electromagnetic Reversal valve and the 7th two position, three-way electromagnetic change valve;

The main accumulator by second shut-off valve respectively with second two position, three-way electromagnetic change valve and institute The 4th two position, three-way electromagnetic change valve is stated to be connected;

The auxiliary accumulator by first shut-off valve respectively with the check valve, second two-position three-way electromagnetic Reversal valve, the third two position, three-way electromagnetic change valve and the 4th two position, three-way electromagnetic change valve are connected;The list It is connected respectively with the safety valve and the hydraulic pump to valve;The hydraulic pump is connected with the motor;

The first displacement sensor is equipped between the first low-pressure hydraulic cylinder and first high-pressure hydraulic cylinder;Described first Low-pressure hydraulic cylinder is connected with first two position, three-way electromagnetic change valve;First high-pressure hydraulic cylinder with described three or two Three-way solenoid valve is connected;The third two position, three-way electromagnetic change valve commutates with the 5th two-position three-way electromagnetic respectively Valve and the third shut-off valve are connected;5th two position, three-way electromagnetic change valve is changed with the two-position three-way electromagnetic respectively It is connected to valve and the 7th two position, three-way electromagnetic change valve;7th two position, three-way electromagnetic change valve and described second High-pressure hydraulic cylinder is connected;Second displacement is equipped between second high-pressure hydraulic cylinder and the second low-pressure hydraulic cylinder to sense Device;The second low-pressure hydraulic cylinder is connected with the 6th two position, three-way electromagnetic change valve;6th two-position three-way electromagnetic Reversal valve is connected with the 4th two position, three-way electromagnetic change valve;

The controller respectively with first displacement sensor, the first two position, three-way electromagnetic change valve group, second displacement Sensor and the second two position, three-way electromagnetic change valve group are connected;The controller is used for according to first displacement sensor And the displacement signal of second displacement sensor transmissions, Xiang Suoshu the first two position, three-way electromagnetic change valve group and the described 2nd 2 Position three-way solenoid valve group issues control instruction.

Optionally, the piston rod of the first low-pressure hydraulic cylinder and the piston rod of first high-pressure hydraulic cylinder are solid to top Even;The piston rod of the second low-pressure hydraulic cylinder and the piston rod of second high-pressure hydraulic cylinder are connected to top.

Optionally, first displacement sensor is set to the top of the piston rod of the first low-pressure hydraulic cylinder;Described Two displacement sensors are set to the top of the piston rod of the second low-pressure hydraulic cylinder;

The rodless cavity hydraulic fluid port of the first low-pressure hydraulic cylinder and first two position, three-way electromagnetic change valve are connected by pipeline It connects;The rodless cavity hydraulic fluid port of the second low-pressure hydraulic cylinder and the 6th two position, three-way electromagnetic change valve pass through piping connection.

Optionally, the first low-pressure hydraulic cylinder specifically includes: the first rod cavity, First piston bar and the first cylinder cap;

The first spring is had in first rod cavity;The natural length of first spring is the first low-pressure hydraulic cylinder The half of stroke;The both ends of first spring are connected with the First piston bar and first cylinder cap respectively;Described One piston rod is connect with the second piston bar.

Optionally, the second low-pressure hydraulic cylinder specifically includes: the second rod cavity, second piston bar and the second cylinder cap;

Second spring is had in second rod cavity;The natural length of the second spring is the second low-pressure hydraulic cylinder The half of stroke;The both ends of the second spring are connected with the second piston bar and second cylinder cap respectively.

A kind of control method of high pressure accumulator, the control method are applied to a kind of high pressure accumulator;The high pressure stores Energy device includes: main accumulator, auxiliary accumulator, hydraulic pump, motor, check valve, safety valve, the first two position, three-way electromagnetic change valve Group, the second two position, three-way electromagnetic change valve group, first pressure converter, second pressure converter, the first displacement sensor, second Displacement sensor, the first shut-off valve, the second shut-off valve, third shut-off valve and controller;The first pressure converter includes First low-pressure hydraulic cylinder and the first high-pressure hydraulic cylinder;The second pressure converter includes the second low-pressure hydraulic cylinder and second High-pressure hydraulic cylinder;The first two position, three-way electromagnetic change valve group includes the first two position, three-way electromagnetic change valve, the two or two three Electric change valve, third two position, three-way electromagnetic change valve, the 4th two position, three-way electromagnetic change valve and the 5th two-position three way electricity Magnetic reversal valve;The second two position, three-way electromagnetic change valve group includes the 6th two position, three-way electromagnetic change valve and the seven or two three Electric change valve;

The control method includes:

When original state, the first two position, three-way electromagnetic change valve group and second two position, three-way electromagnetic change valve Group is in normal position, and the First piston bar in the first low-pressure hydraulic cylinder is in first low pressure under the action of the first spring The half-travel position of hydraulic cylinder, the second piston bar in the second low-pressure hydraulic cylinder is under the action of second spring in described The half-travel position of second low-pressure hydraulic cylinder, the first pressure converter and the main accumulator are connected, the second pressure Converter and fuel tank are connected;

After start-up operation, if the of short duration filling liquid of the high pressure accumulator or tapping, the First piston bar are moved to the left or to the right It is dynamic, and moving distance is less than the entire stroke of First piston bar, the first two position, three-way electromagnetic change valve group is in the control Device control under, keep initially must not electricity condition so that the first pressure converter works independently;

If the high pressure accumulator continues filling liquid or tapping, the First piston bar is moved to the left or right to extreme displacement When place, control instruction is triggered, the controller controls the first two position, three-way electromagnetic change valve group and two or two described Three-way solenoid valve group is powered or power-off, realizes first pressure converter, second pressure converter, main accumulator and auxiliary Oil circuit between accumulator being opened or disconnecting, to realize the reset and alternating of first pressure converter, second pressure converter Work, reaches the high pressure accumulator and continues filling liquid or tapping purpose.

Optionally, when the original state, the first two position, three-way electromagnetic change valve group and two or two three described Electric change valve group is in normal position, and the First piston bar in the first low-pressure hydraulic cylinder is under the action of the first spring The half-travel position of the first low-pressure hydraulic cylinder, the work of second piston bar in the second low-pressure hydraulic cylinder in second spring With the lower half-travel position in the second low-pressure hydraulic cylinder, the first pressure converter and the main accumulator are connected, The second pressure converter and fuel tank are connected, and are specifically included:

First shut-off valve, the second shut-off valve and third shut-off valve are opened, it is described when starting to work from original state First two position, three-way electromagnetic change valve group and the second two position, three-way electromagnetic change valve group not it is electric, when the high pressure stores When energy device starts filling liquid or tapping, the First piston bar is moved to the left or right from half-travel position, and first displacement passes The displacement signal of the First piston bar is transmitted to the controller by sensor, and the controller is sentenced according to institute's displacement signal It is disconnected whether to be switched to second pressure converter;

If the First piston bar displacement is not up to limit on the left displacement or limit on the right-right-hand limit displacement, the controller is sent out without instruction Out, the first two position, three-way electromagnetic change valve group and the second two position, three-way electromagnetic change valve group keep initialization shape State is only worked by the first pressure converter.

Optionally, when First piston bar displacement reaches limit on the left displacement, first displacement sensor is to described Controller sends limit on the left displacement signal;

The controller controls second two position, three-way electromagnetic change valve according to the limit on the left displacement signal and is switched to Right position work;The third two position, three-way electromagnetic change valve, which is controlled, according to the limit on the left displacement signal is switched to left position work; The 6th two position, three-way electromagnetic change valve, which is controlled, according to the limit on the left displacement signal is switched to right position work;According to the left side Extreme displacement signal controls the 7th two position, three-way electromagnetic change valve and is switched to left position work.

Optionally, when First piston bar displacement reaches limit on the right-right-hand limit displacement, first displacement sensor is to described Controller sends limit on the right-right-hand limit displacement signal;

The controller controls first two position, three-way electromagnetic change valve according to the limit on the right-right-hand limit displacement signal and is switched to Right position work;Second two position, three-way electromagnetic change valve, which is controlled, according to the limit on the right-right-hand limit displacement signal is switched to right position work; The third two position, three-way electromagnetic change valve, which is controlled, according to the limit on the right-right-hand limit displacement signal is switched to left position work;According to the right side Extreme displacement signal controls the 6th two position, three-way electromagnetic change valve and is switched to right position work;It is displaced and is believed according to the limit on the right-right-hand limit Number control the 7th two position, three-way electromagnetic change valve is switched to left position work.

Optionally, it is described only worked by the first pressure converter after, further includes:

The first pressure converter is switched to the second pressure converter to work;

The controller obtains second piston bar displacement signal transmitted by the second displacement sensor, and according to described Second piston bar displacement signal judges whether to switch to the first pressure converter work again.

The specific embodiment provided according to the present invention, the invention discloses following technical effects: the present invention provides one kind High pressure accumulator and its control method realize super-pressure accumulator using the Normal hydraulics element such as common accumulator, hydraulic cylinder Effect, the switching between just can control the work of two pressure converters by detection hydraulic cylinder piston rod misalignment and reset, Control is easy.

Meanwhile high pressure accumulator provided by the present invention is versatile, is suitable for high-pressure low-flow hydraulic system, is also suitable In high-pressure high flux hydraulic power system, when being applied to high-pressure low-flow hydraulic system, first pressure converter works independently;When answering When for high-pressure high flux hydraulic power system, the first, second pressure converter can work alternatively automatically, realize persistently filling for accumulator Liquid or tapping, so as to increase the capacity of high pressure accumulator while reducing the size of high pressure accumulator.

Detailed description of the invention

It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 is high pressure accumulator structure chart provided by the present invention;

Fig. 2 is the control method flow chart of high pressure accumulator provided by the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

The object of the present invention is to provide a kind of high pressure accumulator and its control methods, can increase the same of accumulator volume When, reduce the size of hydraulic cylinder.

In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real Applying mode, the present invention is described in further detail.

Fig. 1 is high pressure accumulator structure chart provided by the present invention, as shown in Figure 1, a kind of high pressure accumulator, comprising: main Accumulator 1, auxiliary accumulator 2, hydraulic pump 3, motor 4, check valve 5, safety valve 6, the first two position, three-way electromagnetic change valve group, Two two position, three-way electromagnetic change valve groups, first pressure converter 7, second pressure converter 8, the first displacement sensor 9, second Displacement sensor 10, the first shut-off valve 11, the second shut-off valve 12, third shut-off valve 13 and controller 14;The first pressure turns Parallel operation 7 includes the first low-pressure hydraulic cylinder 7-1 and the first high-pressure hydraulic cylinder 7-2;The second pressure converter 8 includes second low Pressure cylinder 8-1 and the second high-pressure hydraulic cylinder 8-2;The first two position, three-way electromagnetic change valve group includes the first two-position three way Solenoid directional control valve 15, the second two position, three-way electromagnetic change valve 16, third two position, three-way electromagnetic change valve 17, the 4th two-position three way electricity Magnetic reversal valve 18 and the 5th two position, three-way electromagnetic change valve 19;The second two position, three-way electromagnetic change valve group includes the six or two Position three-way solenoid valve 20 and the 7th two position, three-way electromagnetic change valve 21;The main accumulator 1 ends by described second Valve 12 is connected with second two position, three-way electromagnetic change valve and the 4th two position, three-way electromagnetic change valve respectively;It is described Auxiliary accumulator 2 by first shut-off valve 11 respectively with the check valve 5, second two position, three-way electromagnetic change valve, The third two position, three-way electromagnetic change valve and the 4th two position, three-way electromagnetic change valve are connected;The check valve 5 divides It is not connected with the safety valve 6 and the hydraulic pump 3;The hydraulic pump 3 is connected with the motor 4;Described first is low The first displacement sensor 9 is equipped between pressure cylinder 7-1 and the first high-pressure hydraulic cylinder 7-2;The first low-pressure hydraulic cylinder 7-1 is connected with first two position, three-way electromagnetic change valve 15;The first high-pressure hydraulic cylinder 7-2 with described three or two three Electric change valve is connected;The third two position, three-way electromagnetic change valve respectively with the 5th two position, three-way electromagnetic change valve And the third shut-off valve 13 is connected;5th two position, three-way electromagnetic change valve is electric with the 4th two-position three way respectively Magnetic reversal valve and the 7th two position, three-way electromagnetic change valve are connected;7th two position, three-way electromagnetic change valve with it is described Second high-pressure hydraulic cylinder 8-2 is connected;It is equipped between the second high-pressure hydraulic cylinder 8-2 and the second low-pressure hydraulic cylinder 8-1 Second displacement sensor 10;The second low-pressure hydraulic cylinder 8-1 is connected with the 6th two position, three-way electromagnetic change valve;It is described 6th two position, three-way electromagnetic change valve is connected with the 4th two position, three-way electromagnetic change valve;The controller respectively with it is described First displacement sensor 9, the first two position, three-way electromagnetic change valve group, second displacement sensor 10 and the second two-position three-way electromagnetic Commutation valve group is connected;The controller is used to be transmitted according to first displacement sensor 9 and second displacement sensor 10 Displacement signal, Xiang Suoshu the first two position, three-way electromagnetic change valve group and the second two position, three-way electromagnetic change valve group issue Control instruction.

In practical applications, the work of the piston rod of the first low-pressure hydraulic cylinder 7-1 and the first high-pressure hydraulic cylinder 7-2 Stopper rod is connected to top;The piston rod of the piston rod of the second low-pressure hydraulic cylinder 8-1 and the second high-pressure hydraulic cylinder 8-2 are to top It is connected.

In practical applications, first displacement sensor 9 is set on the top of the piston rod of the first low-pressure hydraulic cylinder 7-1 End;The second displacement sensor 10 is set on the top of the piston rod of the second low-pressure hydraulic cylinder 8-1;The first low pressure liquid The rodless cavity hydraulic fluid port of cylinder pressure 7-1 and first two position, three-way electromagnetic change valve pass through piping connection;Second low-pressure hydraulic The rodless cavity hydraulic fluid port of cylinder 8-1 and the 6th two position, three-way electromagnetic change valve pass through piping connection.

In practical applications, the first low-pressure hydraulic cylinder 7-1 is specifically included: the first rod cavity, First piston bar and One cylinder cap;The first spring is had in first rod cavity;The natural length of first spring is the first low-pressure hydraulic cylinder The half of 7-1 stroke;The both ends of first spring are connected with the First piston bar and first cylinder cap respectively;It is described First piston bar is connect with the second piston bar.

In practical applications, the second rod cavity, second piston bar and the second cylinder cap;The second bullet is had in second rod cavity Spring;The natural length of the second spring is the half of the second low-pressure hydraulic cylinder 8-1 stroke;The both ends of the second spring It is connected respectively with the second piston bar and second cylinder cap.

Main accumulator 1 is used to carry out high-pressure system filling liquid, tapping function, and auxiliary accumulator 2 is used to turn first pressure Parallel operation 7,8 reset function of second pressure converter, due to main accumulator 1 and auxiliary accumulator 2 by high/low pressure conversion device with High-pressure hydraulic connection, so select mesolow routine accumulator that can meet system requirements in type selecting, main accumulator 1 with And conventional type bag type accumulator or conventional type piston may be selected according to the working condition requirement of high pressure accumulator in auxiliary accumulator 2 Formula accumulator.

Connecting line between the hydraulic fluid port of low-pressure hydraulic cylinder and main accumulator 1 and auxiliary accumulator 2 uses low pressure pipe, high Pressure cylinder hydraulic fluid port connecting line uses high-pressure oil pipe, the hydraulic cylinder ruler of first pressure converter 7 and second pressure converter 8 It is very little to design according to the actual situation, small size hydraulic cylinder can be preferentially selected, Integration Design is easy to implement, reduces land occupation face Long-pending, the spring in low-pressure hydraulic cylinder resets for realizing centering when piston rod off position, and spring rate should not be too large.

Fig. 2 is the control method flow chart of high pressure accumulator provided by the present invention, as shown in Fig. 2, a kind of high-voltage energy-storage The control method of device, comprising:

Step 201: when original state, the first two position, three-way electromagnetic change valve group and second two-position three way electricity Magnetic commutation valve group is in normal position, and the First piston bar in the first low-pressure hydraulic cylinder 7-1 is under the action of the first spring The half-travel position of the first low-pressure hydraulic cylinder 7-1, the second piston bar in the second low-pressure hydraulic cylinder 8-1 is in the second bullet The half-travel position of the second low-pressure hydraulic cylinder 8-1 is under the action of spring, the piston rod of second pressure converter 8 is in spring Effect is lower to be in hydraulic cylinder half-travel position, and the first pressure converter 7 is connected with the main accumulator, the second pressure Converter 8 and fuel tank are connected.Wherein, hydraulic cylinder travel is the moveable maximum distance of cylinder inner piston, i.e. the movement of piston rod is long Degree.

The step 201 specifically includes: opening first shut-off valve 11, the second shut-off valve 12 and third shut-off valve 13, when starting to work from original state, the first two position, three-way electromagnetic change valve group and second two-position three-way electromagnetic The valve group that commutates not it is electric, when the high pressure accumulator starts filling liquid or tapping, the First piston bar is from half-travel position It being moved to the left or right, the displacement signal of the First piston bar is transmitted to the controller by first displacement sensor 9, The controller is according to institute's displacement signal to determine whether being switched to second pressure converter 8;If the First piston bar position When moving not up to limit on the left displacement or limit on the right-right-hand limit displacement, the controller is issued without instruction, and first two-position three-way electromagnetic changes Original operating state is kept to valve group and the second two position, three-way electromagnetic change valve group, only by the first pressure converter 7 work.

The controller is by detecting the displacement signal to determine whether needing to be switched to second pressure converter 8.

When the displacement of 7 piston rod of first pressure converter is not up to left (right side) extreme displacement, then controller 14 is sent out without instruction Out, solenoid valve block keeps original operating state, still only has first pressure converter to work at this time.

Step 202: after start-up operation, if the of short duration filling liquid of the high pressure accumulator or tapping, the First piston bar is to the left Or move right, and moving distance is less than the entire stroke of First piston bar, the first two position, three-way electromagnetic change valve group exists Under controller control, keep initially must not electricity condition so that the first pressure converter works independently.

Step 203: if the high pressure accumulator continues filling liquid or tapping, the First piston bar be moved to the left or right to When at extreme displacement, control instruction is triggered, the controller controls the first two position, three-way electromagnetic change valve group and described Second two position, three-way electromagnetic change valve group is powered or power-off, realizes first pressure converter, second pressure converter 8, main accumulation of energy Oil circuit between device 1 and auxiliary accumulator 2 being opened or disconnecting, to realize first pressure converter, second pressure converter 8 Reset and alternation, reach the high pressure accumulator and continue filling liquid or tapping purpose.

When First piston bar displacement reaches limit on the left displacement, controller 14 is opened after detecting the extreme displacement signal Beginning the first two position, three-way electromagnetic change valve is controlled, the electromagnet of second two position, three-way electromagnetic change valve 16 obtain it is electric after It is switched to right position work;The electromagnet of the third two position, three-way electromagnetic change valve 17 obtain it is electric after be switched to left position work;It is described 6th two position, three-way electromagnetic change valve, 20 electromagnet obtain it is electric after be switched to the work of right position;7th two position, three-way electromagnetic change valve 21 electromagnet obtain it is electric after be switched to left position work.It is cut off at this point, first pressure converter connect oil circuit with main accumulator 1, and Be switched on 2 oil circuit of auxiliary accumulator, small accumulator plays the role of hydraulic cylinder power source, first pressure converter it is hydraulic Cylinder group and small accumulator constitute differential circuit, so piston rod rapidly moves at limit on the right-right-hand limit displacement;Meanwhile second pressure is converted Device 8 connect oil circuit and is switched on, and start to work with main accumulator 1, high-pressure hydraulic.

When First piston bar displacement reaches limit on the right-right-hand limit displacement, first displacement sensor 9 is to the controller Send limit on the right-right-hand limit displacement signal;The controller 14 detects that the displacement signal starts to the second two position, three-way electromagnetic change valve group Controlled, the first two position, three-way electromagnetic change valve 15 it is electric after be switched to the work of right position, the second two position, three-way electromagnetic change valve 16 it is electric after be switched to the work of right position, third two position, three-way electromagnetic change valve 17 it is electric after be switched to left position work, the six or two Three-way solenoid valve 20 it is electric after be switched to the work of right position, the 7th two position, three-way electromagnetic change valve 21 it is electric after be switched to left position Work.It is cut off, and is switched on small accumulator oil circuit, small storage at this point, first pressure converter connect oil circuit with big accumulator Energy device pushes high-pressure hydraulic cylinder 7-2 to move quickly at limit on the left displacement as power source, at the same time, second pressure conversion Device 8 connect oil circuit with main accumulator 1, high-pressure system and connects start-up operation.

Large capacity high pressure accumulator system is switched to after second pressure converter 8 worked by first pressure converter 7, Controller 14 judges whether system needs to again switch to first pressure according to 8 piston rod displacement signal of second pressure converter Converter 7 works.

When the displacement of 8 piston rod of second pressure converter is not up to extreme displacement, then controller 14 remains above-mentioned to solenoid valve The control of group keeps second pressure converter 8 to work independently.

In 8 piston rod of second pressure converter to the left extreme position motion process, apart from limit on the left position less than four points One of hydraulic cylinder travel when, if first pressure converter piston bar is located at limit on the left displacement at this time, controller 14 issue Control instruction, the first two position, three-way electromagnetic change valve 15, the second two position, three-way electromagnetic change valve 16 and third two-position three way electricity 17 electromagnet of magnetic reversal valve obtains electric, and small accumulator oil liquid enters the first low-pressure hydraulic cylinder 7-1's of first pressure converter at this time First rod cavity, first pressure converter piston bar quickly move right to limit on the right-right-hand limit position, second pressure converter piston bar When continuing to move downward extreme position, controller 14 issues control instruction, the first two position, three-way electromagnetic change valve 15, again Two two position, three-way electromagnetic change valves 16 and third two position, three-way electromagnetic change valve 17 power off, the 4th two position, three-way electromagnetic change valve 18, the 5th two position, three-way electromagnetic change valve 19, the 6th two position, three-way electromagnetic change valve 20 and the commutation of the 7th two-position three-way electromagnetic Valve 21 obtains electric, first pressure converter 7 and main accumulator 1, high-pressure system connection start-up operation, second pressure converter and small storage Energy device is connected, and differential circuit is formed, and piston rod is quickly moved right to extreme position;If working as second pressure converter piston bar It moves downward, when reaching limit on the left position, 7 piston rod of first pressure converter is located at limit on the right-right-hand limit displacement, then controller issues control System instruction, the first two position, three-way electromagnetic change valve 15, the second two position, three-way electromagnetic change valve 16 and third two-position three-way electromagnetic The power-off of 17 electromagnet of reversal valve, the 4th two position, three-way electromagnetic change valve 18, the 5th two position, three-way electromagnetic change valve 19, the 6th 2 Three-way solenoid valve 20 and 21 electromagnet of the 7th two position, three-way electromagnetic change valve obtain electric, first pressure converter 7 and main storage Energy device 1, high-pressure system, which are connected, starts to work, and second pressure converter 8 and the connection of auxiliary accumulator 2 form differential circuit, piston Bar fast right moves to limit on the right-right-hand limit position.

In 8 piston rod of second pressure converter to the right extreme position motion process, apart from limit on the right-right-hand limit position less than four points One of hydraulic cylinder travel when, and first pressure converter piston bar is located at limit on the right-right-hand limit displacement at this time, then controller 14 issues Control instruction, the first two position, three-way electromagnetic change valve 15, the second two position, three-way electromagnetic change valve 16 and third two-position three way electricity 17 electromagnet of magnetic reversal valve obtains electric, and small accumulator oil liquid enters first pressure converter high-pressure hydraulic cylinder 7-2 rodless cavity at this time, and One pressure converter, 7 piston rod is quickly moved to the left extreme position, and 8 piston rod of second pressure converter continues to move right When extreme position, controller 14 issues control instruction, the first two position, three-way electromagnetic change valve 15, the second two-position three-way electromagnetic again Reversal valve 16, third two position, three-way electromagnetic change valve 17 and the power-off of 20 electromagnet of the 6th two position, three-way electromagnetic change valve, the 4th Two position, three-way electromagnetic change valve 18, the 5th two position, three-way electromagnetic change valve 19 and 21 electromagnetism of the 7th two position, three-way electromagnetic change valve Iron obtains electric, and first pressure converter 7 and main accumulator 1, high-pressure system are started to work after connecting, and at the same time, oil liquid enters the The second high-pressure hydraulic cylinder 8-2 rodless cavity in two pressure converters, second pressure converter piston bar are quickly moved to the left extremely At extreme position;If when second pressure converter piston bar, which moves right, reaches limit on the right-right-hand limit position, and at this time, first pressure is converted 7 piston rod of device is located at limit on the left position, then controller 14 issues control instruction, the first two position, three-way electromagnetic change valve 15, second Two position, three-way electromagnetic change valve 16, third two position, three-way electromagnetic change valve 17 and the 6th two position, three-way electromagnetic change valve 20 are disconnected Electricity, the 4th two position, three-way electromagnetic change valve 18, the 5th two position, three-way electromagnetic change valve 19 and the commutation of the 7th two-position three-way electromagnetic Valve 21 it is electric, first pressure converter 7 and main accumulator 1, high-pressure system, which are connected, starts to work, second pressure converter 8 with it is auxiliary Accumulator 2 is helped to connect, oil liquid enters second pressure converter high-pressure hydraulic cylinder 8-2 rodless cavity, and piston rod is quickly moved to the left Extreme position.

The present invention improves the capacity of high pressure accumulator, and structure is simple, at low cost, easy to control.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part It is bright.

Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said It is bright to be merely used to help understand method and its core concept of the invention;At the same time, for those skilled in the art, foundation Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not It is interpreted as limitation of the present invention.

Claims (10)

1. a kind of high pressure accumulator characterized by comprising main accumulator, auxiliary accumulator, hydraulic pump, motor, check valve, Safety valve, the first two position, three-way electromagnetic change valve group, the second two position, three-way electromagnetic change valve group, first pressure converter, second Pressure converter, the first displacement sensor, second displacement sensor, the first shut-off valve, the second shut-off valve, third shut-off valve and Controller;The first pressure converter includes the first low-pressure hydraulic cylinder and the first high-pressure hydraulic cylinder;The second pressure turns Parallel operation includes the second low-pressure hydraulic cylinder and the second high-pressure hydraulic cylinder;The first two position, three-way electromagnetic change valve group includes first Two position, three-way electromagnetic change valve, the second two position, three-way electromagnetic change valve, third two position, three-way electromagnetic change valve, the 4th two-position three way Solenoid directional control valve and the 5th two position, three-way electromagnetic change valve;The second two position, three-way electromagnetic change valve group includes the six or two Three-way solenoid valve and the 7th two position, three-way electromagnetic change valve;
The main accumulator by second shut-off valve respectively with second two position, three-way electromagnetic change valve and described the Four two position, three-way electromagnetic change valves are connected;
The auxiliary accumulator is commutated with the check valve, second two-position three-way electromagnetic respectively by first shut-off valve Valve, the third two position, three-way electromagnetic change valve and the 4th two position, three-way electromagnetic change valve are connected;The check valve It is connected respectively with the safety valve and the hydraulic pump;The hydraulic pump is connected with the motor;
The first displacement sensor is equipped between the first low-pressure hydraulic cylinder and first high-pressure hydraulic cylinder;First low pressure Hydraulic cylinder is connected with first two position, three-way electromagnetic change valve;First high-pressure hydraulic cylinder and the third two-position three way Solenoid directional control valve is connected;The third two position, three-way electromagnetic change valve respectively with the 5th two position, three-way electromagnetic change valve with And the third shut-off valve is connected;5th two position, three-way electromagnetic change valve is changed with the 4th two-position three-way electromagnetic respectively It is connected to valve and the 7th two position, three-way electromagnetic change valve;7th two position, three-way electromagnetic change valve and described second High-pressure hydraulic cylinder is connected;Second displacement is equipped between second high-pressure hydraulic cylinder and the second low-pressure hydraulic cylinder to sense Device;The second low-pressure hydraulic cylinder is connected with the 6th two position, three-way electromagnetic change valve;6th two-position three-way electromagnetic Reversal valve is connected with the 4th two position, three-way electromagnetic change valve;
The controller is sensed with first displacement sensor, the first two position, three-way electromagnetic change valve group, second displacement respectively Device and the second two position, three-way electromagnetic change valve group are connected;The controller be used for according to first displacement sensor and The displacement signal of second displacement sensor transmissions, Xiang Suoshu the first two position, three-way electromagnetic change valve group and two or two three described Electric change valve group issues control instruction.
2. high pressure accumulator according to claim 1, which is characterized in that the piston rod of the first low-pressure hydraulic cylinder and institute The piston rod for stating the first high-pressure hydraulic cylinder is connected to top;The piston rod of the second low-pressure hydraulic cylinder and second high-pressure and hydraulic The piston rod of cylinder is connected to top.
3. high pressure accumulator according to claim 2, which is characterized in that first displacement sensor is set to described first The top of the piston rod of low-pressure hydraulic cylinder;The second displacement sensor is set to the top of the piston rod of the second low-pressure hydraulic cylinder End;
The rodless cavity hydraulic fluid port of the first low-pressure hydraulic cylinder and first two position, three-way electromagnetic change valve pass through piping connection;Institute The rodless cavity hydraulic fluid port and the 6th two position, three-way electromagnetic change valve for stating the second low-pressure hydraulic cylinder pass through piping connection.
4. high pressure accumulator according to claim 1, which is characterized in that the first low-pressure hydraulic cylinder specifically includes: the One rod cavity, First piston bar and the first cylinder cap;
The first spring is had in first rod cavity;The natural length of first spring is the first low-pressure hydraulic cylinder stroke Half;The both ends of first spring are connected with the First piston bar and first cylinder cap respectively;Described first is living Stopper rod is connect with second piston bar.
5. high pressure accumulator according to claim 1, which is characterized in that the second low-pressure hydraulic cylinder specifically includes: the Two rod cavities, second piston bar and the second cylinder cap;
Second spring is had in second rod cavity;The natural length of the second spring is the second low-pressure hydraulic cylinder stroke Half;The both ends of the second spring are connected with the second piston bar and second cylinder cap respectively.
6. a kind of control method of high pressure accumulator, which is characterized in that the control method is applied to a kind of high pressure accumulator;Institute Stating high pressure accumulator includes: main accumulator, auxiliary accumulator, hydraulic pump, motor, check valve, safety valve, the first two-position three way electricity Magnetic commutation valve group, the second two position, three-way electromagnetic change valve group, first pressure converter, second pressure converter, the first displacement pass Sensor, second displacement sensor, the first shut-off valve, the second shut-off valve, third shut-off valve and controller;The first pressure turns Parallel operation includes the first low-pressure hydraulic cylinder and the first high-pressure hydraulic cylinder;The second pressure converter includes the second low-pressure hydraulic cylinder And second high-pressure hydraulic cylinder;The first two position, three-way electromagnetic change valve group includes the first two position, three-way electromagnetic change valve, the Two two position, three-way electromagnetic change valves, third two position, three-way electromagnetic change valve, the 4th two position, three-way electromagnetic change valve and the five or two Position three-way solenoid valve;The second two position, three-way electromagnetic change valve group includes the 6th two position, three-way electromagnetic change valve and the Seven two position, three-way electromagnetic change valves;
The control method includes:
When original state, at the first two position, three-way electromagnetic change valve group and the second two position, three-way electromagnetic change valve group Yu Changwei, the First piston bar in the first low-pressure hydraulic cylinder are in first low-pressure hydraulic under the action of the first spring The half-travel position of cylinder, the second piston bar in the second low-pressure hydraulic cylinder are in described second under the action of second spring The half-travel position of low-pressure hydraulic cylinder, the first pressure converter and the main accumulator are connected, the second pressure conversion Device and fuel tank are connected;
After start-up operation, if the of short duration filling liquid of the high pressure accumulator or tapping, the First piston bar are moved to the left or right, and Moving distance is less than the entire stroke of First piston bar, and the first two position, three-way electromagnetic change valve group is controlled in the controller Under, keep initially must not electricity condition so that the first pressure converter works independently;
If the high pressure accumulator continues filling liquid or tapping, the First piston bar is moved to the left or right to extreme displacement When, trigger control instruction, the controller controls the first two position, three-way electromagnetic change valve group and two or two three described Electric change valve group is powered or power-off, realizes that first pressure converter, second pressure converter, main accumulator and auxiliary store Can oil circuit between device opening or disconnecting, to realize first pressure converter, the reset of second pressure converter and alternately work Make, reaches the high pressure accumulator and continue filling liquid or tapping purpose.
7. the control method of high pressure accumulator according to claim 6, which is characterized in that described when the original state First two position, three-way electromagnetic change valve group and the second two position, three-way electromagnetic change valve group are in normal position, first low pressure First piston bar in hydraulic cylinder is in the half-travel position of the first low-pressure hydraulic cylinder under the action of the first spring, described Second piston bar in second low-pressure hydraulic cylinder is in the half trip of the second low-pressure hydraulic cylinder under the action of second spring Position, the first pressure converter and the main accumulator are connected, and the second pressure converter and fuel tank are connected, specific to wrap It includes:
First shut-off valve, the second shut-off valve and third shut-off valve are opened, when starting to work from original state, described first Two position, three-way electromagnetic change valve group and the second two position, three-way electromagnetic change valve group not it is electric, when the high pressure accumulator When starting filling liquid or tapping, the First piston bar is moved to the left or right from half-travel position, first displacement sensor The displacement signal of the First piston bar is transmitted to the controller, the controller judged according to institute's displacement signal be It is no to be switched to second pressure converter;
If the First piston bar displacement is not up to limit on the left displacement or limit on the right-right-hand limit displacement, the controller is issued without instruction, The first two position, three-way electromagnetic change valve group and the second two position, three-way electromagnetic change valve group keep original operating state, Only worked by the first pressure converter.
8. the control method of high pressure accumulator according to claim 7, which is characterized in that when the First piston bar is displaced When reaching limit on the left displacement, first displacement sensor sends limit on the left displacement signal to the controller;
The controller controls second two position, three-way electromagnetic change valve according to the limit on the left displacement signal and is switched to right position Work;The third two position, three-way electromagnetic change valve, which is controlled, according to the limit on the left displacement signal is switched to left position work;According to The limit on the left displacement signal controls the 6th two position, three-way electromagnetic change valve and is switched to right position work;According to the limit on the left Displacement signal controls the 7th two position, three-way electromagnetic change valve and is switched to left position work.
9. the control method of high pressure accumulator according to claim 7, which is characterized in that when the First piston bar is displaced When reaching limit on the right-right-hand limit displacement, first displacement sensor sends limit on the right-right-hand limit displacement signal to the controller;
The controller controls first two position, three-way electromagnetic change valve according to the limit on the right-right-hand limit displacement signal and is switched to right position Work;Second two position, three-way electromagnetic change valve, which is controlled, according to the limit on the right-right-hand limit displacement signal is switched to right position work;According to The limit on the right-right-hand limit displacement signal controls the third two position, three-way electromagnetic change valve and is switched to left position work;According to the limit on the right-right-hand limit Displacement signal controls the 6th two position, three-way electromagnetic change valve and is switched to right position work;According to the limit on the right-right-hand limit displacement signal control It makes the 7th two position, three-way electromagnetic change valve and is switched to left position work.
10. the control method of high pressure accumulator according to claim 7, which is characterized in that described only by described After one pressure converter is worked, further includes:
The first pressure converter is switched to the second pressure converter to work;
The controller obtains second piston bar displacement signal transmitted by the second displacement sensor, and according to described second Piston rod displacement signal judges whether to switch to the first pressure converter work again.
CN201811516162.5A 2018-12-12 2018-12-12 A kind of high pressure accumulator and its control method CN109281877B (en)

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