CN108194433A - Electromechanical static pressure actuating system - Google Patents
Electromechanical static pressure actuating system Download PDFInfo
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- CN108194433A CN108194433A CN201711383900.9A CN201711383900A CN108194433A CN 108194433 A CN108194433 A CN 108194433A CN 201711383900 A CN201711383900 A CN 201711383900A CN 108194433 A CN108194433 A CN 108194433A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (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 electromechanical static pressure actuating systems, including servo motor, hydraulic variable displacement pump, first valve group and hydraulic cylinder, servo motor is connect by coupling assembly with hydraulic variable displacement pump, hydraulic variable displacement pump is connect by the first valve group with hydraulic cylinder, first valve group includes two high-pressure pre-tighten branches, every high-pressure pre-tighten branch includes the first accumulator and the first valve, first accumulator is used to maintain the oil liquid pressure of high-pressure pre-tighten branch, first valve is used to control the keying of high-pressure pre-tighten branch, servo motor drives hydraulic variable displacement pump, controllable state is in by two chambers of the first valve group hydraulic cylinder.The present invention provides hyperbaric environment by oil inlet pipe and oil return line of first valve group for hydraulic variable displacement pump so that two oil pockets of hydraulic cylinder are in controllable state, can significantly improve the intrinsic frequency of electromechanical static pressure actuating system, improve its dynamic property.
Description
Technical field
The present invention relates to electro-hydraulic servo controls and start technical field, and in particular, to a kind of electromechanical static pressure actuating system.
Background technology
Electromechanical static pressure actuating system is a kind of pump control volume control system, simple in structure, energy-efficient with Mechatronic Systems
With hydraulic system power ratio it is big, bearing capacity is strong the advantages of, be the new research direction in hydraulic servo field.Existing electromechanical static pressure is made
In dynamic system, hydraulic actuating mechanism is that single-chamber is controlled, and system frequency is relatively low, and dynamic property is poor.
Invention content
In view of the foregoing, it is an object to a kind of electromechanical static pressure actuating system is provided, to improve the intrinsic of system
Frequency improves the dynamic property of actuating system.
To achieve these goals, the present invention uses following technical scheme：
Electromechanical static pressure actuating system of the present invention, including：Servo motor, hydraulic variable displacement pump, the first valve group and hydraulic cylinder,
The motor shaft of the servo motor is connect by coupling assembly with the shaft of the hydraulic variable displacement pump, the hydraulic pressure
Variable pump includes the first oil outlet and the first oil return opening,
First valve group includes the first oil inlet, the second oil inlet, the second oil outlet, third oil outlet and two high pressures
Branch is pre-tightened, first oil inlet is connect with first oil outlet, and second oil outlet connects with first oil return opening
It connects, every high-pressure pre-tighten branch includes the first accumulator and the first valve, the first end of first accumulator and described the
The first end connection of one valve, first accumulator are used to maintaining the oil liquid pressure of the high-pressure pre-tighten branch, and described first
Valve is used to control the keying of the high-pressure pre-tighten branch, and the second end of two the first valves is connected to first oil inlet
On pipeline between mouth and the third oil outlet and on the pipeline between second oil outlet and second oil inlet,
The hydraulic cylinder includes the second oil return opening and third oil inlet, and second oil return opening connects with second oil inlet
It connecing, the third oil inlet is connect with the third oil outlet,
The servo motor drives the hydraulic variable displacement pump, and two chambers by the first valve group hydraulic cylinder are equal
In controllable state.
Preferably, first valve group further includes two auxiliary oil inlets, and every high-pressure pre-tighten branch further includes the second valve
Door, first end of two auxiliary oil inlets respectively with the second valve are connect, and the second end of second valve is stored with described first
The second end connection of energy device, the hydraulic variable displacement pump further include inlet port,
The electromechanical static pressure actuating system further includes auxiliary pump group, and the auxiliary pump group includes fuel tank and two oil-feed ports,
The fuel tank is connect by fuel tank interface with the inlet port, and two oil-feed ports are connect respectively with the auxiliary oil inlet.
Preferably, first valve group further includes the first repairing mouth and repairing branch, and the repairing branch includes shuttle valve, subtracts
Pressure valve and the first spring pre-tightening check valve, the two entrances end of the shuttle valve connect two high-pressure pre-tighten branches, institute respectively
The port of export for stating shuttle valve connects the pressure reducing valve, and the pressure reducing valve connects the first spring pre-tightening check valve, first bullet
Spring Pre-loaded one-way valve connects the first repairing mouth,
The electromechanical static pressure actuating system further includes the second valve group, and second valve group is connected to first valve group and institute
Between stating hydraulic cylinder, second valve group includes the 4th oil inlet, the 5th oil inlet, the 4th oil outlet, the 5th oil outlet, second
Repairing mouth, the second accumulator, second spring Pre-loaded one-way valve and third spring pre-tightening check valve,
The second repairing mouth is connect with the first repairing mouth, and the 4th oil inlet connects with the third oil outlet
It connects, the 4th oil outlet is connect with second oil inlet, and the 5th oil outlet is connect with the third oil inlet, described
5th oil inlet is connect with second oil return opening, and second accumulator connects the second repairing mouth and second bullet
Spring Pre-loaded one-way valve and the third spring pre-tightening check valve, the second spring Pre-loaded one-way valve and the 4th oil inlet and
Pipeline connection between 5th oil outlet, the third spring pre-tightening check valve and the 4th oil outlet and the described 5th
Pipeline connection between oil inlet.
Preferably, second valve group further includes first flowmeter, second flowmeter and side and connects branch,
The first flowmeter is mounted in the connecting pipe of the 4th oil inlet and the 5th oil outlet, second flowmeter
In the connecting pipe of the 4th oil outlet and the 5th oil inlet, the first flowmeter and second flow score
The flow of two chamber of hydraulic cylinder Ce Liang not be flowed through,
The side connects branch and includes sequentially connected third valve, third flowmeter and the 4th valve, and the side connects branch
One end be connected between the 4th oil inlet and the first flowmeter, the side connect branch the other end be connected to it is described
Between 4th oil outlet and the second flowmeter.
Preferably, second valve group further includes the first overflow valve and the second overflow valve, and first overflow valve connects institute
The pipeline between the second accumulator and the 4th oil inlet and the 5th oil outlet is stated, described in the second overflow valve connection
Pipeline between second accumulator and the 4th oil outlet and the 5th oil inlet.
Preferably, every high-pressure pre-tighten branch further includes throttle valve and pressure gauge, and the first of first accumulator
End connects the pressure gauge, and the pressure gauge connects the throttle valve, and the throttle valve connects the first end of first valve.
Preferably, every high-pressure pre-tighten branch further includes two check valves, and two check valves are connected to described
Between the second end of first accumulator and the second end of second valve.
Preferably, the auxiliary pump group discontinuous operation, in the hydraulic variable displacement pump oil return line and the fluid of oil outlet pipe
Pressure reduction 20% alternatively, when needing to reset oil liquid pressure, starts work, remaining time is standby.
Preferably, the electromechanical static pressure actuating system further includes platform and rack, the servo motor, the hydraulic variable flow
Pump, first valve group and the hydraulic cylinder are fixed on the platform, and the platform is fixed on the upside of the rack, described
Bottom plate is installed, the auxiliary pump group is fixed on the bottom plate on the downside of frame.
Preferably, the platform is T-slot platform, and the servo motor is fixed on motor cabinet, the motor cabinet and institute
It states platform to be fixedly connected, the hydraulic variable displacement pump is fixed on pump seat, and the pump seat is fixedly connected with the platform.
Compared with prior art, the present invention has the following advantages and beneficial effect：
The present invention provides hyperbaric environment by oil inlet pipe and oil return line of first valve group for hydraulic variable displacement pump so that liquid
Two oil pockets of cylinder pressure are in Pre strained state, can significantly improve the intrinsic frequency of electromechanical static pressure actuating system, and it is dynamic to improve it
State property energy.The present invention can effectively improve its servo performance under the premise of unobvious increase actuating system power.
Description of the drawings
Fig. 1 is electromechanical static pressure actuating system structure diagram of the present invention；
Fig. 2 is electromechanical static pressure actuating system oil circuit connection figure of the present invention；
Fig. 3 is the oil circuit connection figure of the first valve group of electromechanical static pressure actuating system of the present invention；
Fig. 4 is the oil circuit connection figure of the second valve group of electromechanical static pressure actuating system of the present invention.
Specific embodiment
Embodiment of the present invention described below with reference to the accompanying drawings.Those of ordinary skill in the art may recognize that
It arrives, it without departing from the spirit and scope of the present invention, can be with a variety of different mode or combinations to described
Embodiment is modified.Therefore, attached drawing and description is regarded as illustrative in nature rather than the protection for limiting claim
Range.In addition, in the present specification, attached drawing is drawn not in scale, and identical reference numeral represents identical part.
The present embodiment is described in detail with reference to Fig. 1-Fig. 4.
Fig. 1 is electromechanical static pressure actuating system structure diagram of the present invention, and Fig. 2 is electromechanical static pressure start of the present invention
System oil-way connection figure, as depicted in figs. 1 and 2, electromechanical static pressure actuating system of the present invention include：Servo motor 200, hydraulic pressure
Variable pump 300, the first valve group 400 and hydraulic cylinder 500.
Wherein, the motor shaft of servo motor 200 is connect by coupling assembly 210 with the shaft of hydraulic variable displacement pump 300, liquid
Pressure variable amount pump 300 includes the first oil outlet 302 and the first oil return opening 303；
First valve group 400 includes the first oil inlet 401, the second oil inlet 404, the second oil outlet 402, third oil outlet
403 and two high-pressure pre-tighten branches, the first oil inlet 401 connect with the first oil outlet 302 by pipeline, the second oil outlet 402
It being connect with the first oil return opening 303 by pipeline, every high-pressure pre-tighten branch includes the first accumulator 410 and the first valve 420,
The first end of first accumulator 410 is connect with the first end of the first valve 420, and the first accumulator 410 is high pressure accumulator, is used for
The oil liquid pressure of high-pressure pre-tighten branch is maintained, the first valve 420 is used to control the keying of high-pressure pre-tighten branch, two the first valves
420 second end is connected on the pipeline between the first oil inlet 401 and third oil outlet 403 and the second oil outlet
402 and the second pipeline between oil inlet 404 on；
Hydraulic cylinder 500 includes the second oil return opening 501 and third oil inlet 502, the second oil return opening 501 and the second oil inlet
404 are connected by pipeline, and third oil inlet 502 is connect with third oil outlet 403 by pipeline；
Servo motor 200 drives hydraulic variable displacement pump 300, is in by two chambers of 400 hydraulic cylinder 500 of the first valve group
Controllable state.
The present invention provides hyperbaric environment by oil outlet pipe and oil return line of first valve group 400 for hydraulic variable displacement pump 300,
The high-pressure pre-tighten branch of first valve group 400 causes two chambers of hydraulic cylinder 500 to be in the high pressure controllable state of setting, so as to improve
The intrinsic frequency of electromechanical static pressure actuating system improves dynamic property.
Preferably, the first valve group 400 further includes two auxiliary oil inlets 405, and every high-pressure pre-tighten branch further includes second
Valve 430, two first ends of the auxiliary oil inlets 405 respectively with the second valve 430 connects, the second end of the second valve 430 and
The second end connection of first accumulator 410, hydraulic variable displacement pump 300 further include inlet port 304；The electromechanical static pressure actuating system is also
Including assisting pump group 600, auxiliary pump group 600 includes fuel tank and two oil-feed ports 602, fuel tank pass through fuel tank interface 601 and oil suction
Mouth 304 is connected by pipeline, and two oil-feed ports 602 are connect respectively by pipeline with auxiliary oil inlet 405.Wherein, pump group is assisted
The pressure of 600 oil-feed port 602 can be adjusted as needed.
Wherein, two the second valves 430 in the first valve group 400 control auxiliary two of pump group 600 by oil-feed port respectively
602 keyings of fuel feeding branch formed with auxiliary oil inlet 405.
The fluid in the first accumulator 410 is back to fuel tank interface 601 by fuel feeding branch in order to prevent, it is preferable that the
Every high-pressure pre-tighten branch of one valve group 400 further includes two check valves 440, and two check valves 440 are connected to the first storage
It can be between the second end of device 410 and the second end of the second valve 430, to ensure the one-way flow of fluid.
Preferably, auxiliary pump group 600 is in discontinuous operation state, only in 300 oil return line of hydraulic variable displacement pump and flowline
When the oil liquid pressure on road is greatly reduced or needs to reset oil liquid pressure, machine work is just opened, remaining time is in standby
State, so that the working time of auxiliary pump group 600 is shorter, power consumption is smaller.Preferably, in 300 oil return pipe of hydraulic variable displacement pump
When the oil liquid pressure of road and oil outlet pipe reduces by 20% or so, start work, two fuel feeding branches are controlled by the second valve 430
It opens, supplements fluid to two high-pressure pre-tighten branches respectively, promote oil liquid pressure, the first valve group 400 of auxiliary is hydraulic variable displacement pump
300 oil outlet pipe and oil return line provides hyperbaric environment so that two oil pockets of hydraulic cylinder 500 are constantly in the controllable shape of high pressure
State.
Fig. 3 is the oil circuit connection figure of the first valve group of electromechanical static pressure actuating system 400 of the present invention, as shown in figure 3, it is preferred that
Ground, each high-pressure pre-tighten branch further include throttle valve 450 and pressure gauge 460, the first end connection pressure gauge of the first accumulator 410
460, pressure gauge 460 connects throttle valve 450, and throttle valve 450 connects the first end of the first valve 420.Wherein, pressure gauge 460 is used
The current oil liquid pressure value of high-pressure pre-tighten branch where instruction, throttle valve 450 are used for the stream of high-pressure pre-tighten branch where controlling
Amount, it is too fast the fluid inside the first accumulator 410 to be prevented to be lost in so that the first accumulator 410 maintains stable oil liquid pressure.
In order to supplement the oil liquid leakage of electromechanical static pressure actuating system, prevent channel interior from air pocket, machine of the present invention occur
Electric static pressure actuating system further includes the second valve group 700, and the second valve group 700 is connected between the first valve group 400 and hydraulic cylinder 500.
First valve group 400 further includes the first repairing mouth 406 and repairing branch, and repairing branch passes through the first repairing mouth 406 and the second valve group
700 connections provide fluid for the second valve group 700.
The repairing branch of first valve group 400 includes shuttle valve 470,480 and first spring pre-tightening check valve 490 of pressure reducing valve, shuttle
The two entrances end of valve 470 connects two high-pressure pre-tighten branches, the port of export connection pressure reducing valve 480 of shuttle valve 470, pressure reducing valve respectively
480 the first spring pre-tightening check valves 490 of connection, the first spring pre-tightening check valve 490 connect the first repairing mouth 406, the first repairing
Mouth 406 is connect with the second valve group 700.
Lead to the oil of hydraulic cylinder 500 when the oil liquid pressure of two high-pressure pre-tighten branches in the first valve group 400 is uneven
During liquid oil liquid pressure imbalance, shuttle valve 470 selects the oil circuit of the higher side of oil liquid pressure in two high-pressure pre-tighten branches, makes this
Side fluid using the first spring pre-tightening check valve 490 is the after being reduced to the oil liquid pressure of setting after the pressure reducing valve 480
The repairing branch of two valve groups 700 provides fluid, the fluid of oil circuit in actuating system to be maintained to balance, prevents from going out inside oil line pipe
Existing air pocket.
Fig. 4 is the oil circuit connection figure of the second valve group of electromechanical static pressure actuating system 700 of the present invention, as shown in figure 4, second
Valve group 700 includes the 4th oil inlet 701, the 5th oil inlet 704, the 4th oil outlet 703, the 5th oil outlet 702, the second repairing mouth
705th, the second accumulator 710, second spring Pre-loaded one-way valve 720 and third spring pre-tightening check valve 730.
Second repairing mouth 705 is connect with the first repairing mouth 406 by pipeline, the 4th oil inlet 701 and third oil outlet 403
It is connected by pipeline, the 4th oil outlet 703 is connect with the second oil inlet 404 by pipeline, the 5th oil outlet 702 and third oil inlet
Mouth 502 is connected by pipeline, and the 5th oil inlet 704 is connect with the second oil return opening 501 by pipeline, and the second accumulator 710 connects
Second repairing mouth 705 and second spring Pre-loaded one-way valve 720 and third spring pre-tightening check valve 730, second spring pre-tighten single
Pipeline connection between 720 and the 4th oil inlet 701 of valve and the 5th oil outlet 702, third spring pre-tightening check valve 730 and the
Pipeline connection between four oil outlets 703 and the 5th oil inlet 704.
The supplement fluid of the repairing branch of first valve group 400 enters the second valve group 700 by the second repairing mouth 705, passes through
After second accumulator 710, connection oil circuit and the 4th oil outlet between the 4th oil inlet 701 and the 5th oil outlet 702
703 and the 5th connection oil circuit between oil inlet 704 among the relatively low side of selection oil liquid pressure oil circuit, by with relatively low side
The second spring Pre-loaded one-way valve 720 of oil circuit connection or third spring pre-tightening check valve 730 provide makeup oil to the oil circuit
Liquid.
Preferably, the second valve group 700 further includes first flowmeter 740, second flowmeter 750 and side and connects branch.Wherein,
Flow meters 740 are mounted in the connecting pipe of the 4th oil inlet 701 and the 5th oil outlet 702, and second flowmeter 750 is mounted on
In the connecting pipe of 4th oil outlet 703 and the 5th oil inlet 704, first flowmeter 740 and second flowmeter 750 measure respectively
Flow through the flow of 500 two oil pockets of hydraulic cylinder.Side connects branch and includes sequentially connected third valve 761,763 and of third flowmeter
4th valve 762, one end that side connects branch are connected between the 4th oil inlet 701 and first flowmeter 740, and side connects the another of branch
One end is connected between the 4th oil outlet 703 and second flowmeter 750.
Third flowmeter 763 flows through the other flow for connecing branch for measuring, and third valve 761 is used to control hydraulic cylinder 500
Side connects the keying of branch, and side connects branch and is closed when actuating system works normally, and only breaks down in actuating system
Or just opened during pilot scale study, to carry out system debug and fault detect.
The pipeline superpressure of second valve group 700 in order to prevent, it is preferable that the second valve group 700 further includes 770 He of the first overflow valve
Second overflow valve 780, the first overflow valve 770 connect the second accumulator 710 and the 4th oil inlet 701 and the 5th oil outlet 702 it
Between pipeline, the second overflow valve 780 connects the pipe between the second accumulator 710 and the 4th oil outlet 703 and the 5th oil inlet 704
Road.When the oil inlet pipe of the second valve group 700 or the excessive oil liquid pressure of oil outlet pipe, the first overflow valve 770 or the second is opened
Overflow valve 780 so that extra fluid is flow back into the second accumulator 710, to maintain the oil liquid pressure of oil circuit normal.
In a preferred embodiment, the first accumulator 410 is high pressure accumulator, and the second accumulator 710 is stored for low pressure
Energy device, two chambers of hydraulic cylinder 500 are symmetrical, and the first valve 420, the second valve 430,761 and the 4th valve 762 of third valve are
Ball valve.
Electromechanical static pressure actuating system further includes platform 100 and rack 110, servo motor 200, hydraulic variable displacement pump 300, first
Valve group 400 and hydraulic cylinder 500 are fixed on platform 100, and platform 100 is fixed on 110 upside of rack, and 110 downside of rack is equipped with
Bottom plate, auxiliary pump group 600 are fixed on bottom plate, can be fixedly connected by bolt with bottom plate.
Preferably, platform 100 is T-slot platform, in order to which the installation of component each on platform is fixed.Servo motor 200 is solid
It is scheduled on motor cabinet 201, motor cabinet 201 is fixedly connected with platform 100, and hydraulic variable displacement pump 300 is fixed on pump seat 301, pump seat
301 are fixedly connected with platform 100.Wherein, rack 110, motor cabinet 201, pump seat 301, the first valve group 400, the second valve group 700 with
And hydraulic cylinder 500 is fixedly connected by bolt with platform 100, facilitates the dismounting and change of each component on platform.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification for all within the spirits and principles of the present invention, being made,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electromechanical static pressure actuating system, which is characterized in that including：Servo motor, hydraulic variable displacement pump, the first valve group and hydraulic pressure
Cylinder,
The motor shaft of the servo motor is connect by coupling assembly with the shaft of the hydraulic variable displacement pump, the hydraulic variable flow
Pump includes the first oil outlet and the first oil return opening,
First valve group includes the first oil inlet, the second oil inlet, the second oil outlet, third oil outlet and two high-pressure pre-tightens
Branch, first oil inlet are connect with first oil outlet, and second oil outlet is connect with first oil return opening, often
High-pressure pre-tighten branch includes the first accumulator and the first valve, the first end of first accumulator and first valve
First end connection, first accumulator is used to maintain the oil liquid pressure of the high-pressure pre-tighten branch, and first valve is used
In the keying for controlling the high-pressure pre-tighten branch, the second end of two the first valves is connected to first oil inlet and institute
It states on the pipeline on the pipeline between third oil outlet and between second oil outlet and second oil inlet,
The hydraulic cylinder includes the second oil return opening and third oil inlet, and second oil return opening is connect with second oil inlet,
The third oil inlet is connect with the third oil outlet,
The servo motor drives the hydraulic variable displacement pump, is in by two chambers of the first valve group hydraulic cylinder
Controllable state.
2. electromechanical static pressure actuating system according to claim 1, which is characterized in that
First valve group further includes two auxiliary oil inlets, and every high-pressure pre-tighten branch further includes the second valve, two auxiliary
First end of the oil inlet respectively with the second valve is connect, the second end of second valve and the second end of first accumulator
Connection, the hydraulic variable displacement pump further include inlet port,
The electromechanical static pressure actuating system further includes auxiliary pump group, and the auxiliary pump group includes fuel tank and two oil-feed ports, described
Fuel tank is connect by fuel tank interface with the inlet port, and two oil-feed ports are connect respectively with the auxiliary oil inlet.
3. electromechanical static pressure actuating system according to claim 1, which is characterized in that
First valve group further includes the first repairing mouth and repairing branch, and the repairing branch includes shuttle valve, pressure reducing valve and first
Spring pre-tightening check valve, the two entrances end of the shuttle valve connect two high-pressure pre-tighten branches respectively, and the shuttle valve goes out
Mouth end connects the pressure reducing valve, and the pressure reducing valve connects the first spring pre-tightening check valve, and first spring pre-tightening is unidirectional
Valve connects the first repairing mouth,
The electromechanical static pressure actuating system further includes the second valve group, and second valve group is connected to first valve group and the liquid
Between cylinder pressure, second valve group includes the 4th oil inlet, the 5th oil inlet, the 4th oil outlet, the 5th oil outlet, the second repairing
Mouth, the second accumulator, second spring Pre-loaded one-way valve and third spring pre-tightening check valve,
The second repairing mouth is connect with the first repairing mouth, and the 4th oil inlet is connect with the third oil outlet, institute
The 4th oil outlet to be stated to connect with second oil inlet, the 5th oil outlet is connect with the third oil inlet, and the described 5th
Oil inlet is connect with second oil return opening, and second accumulator connects the second repairing mouth and the second spring is pre-
Tight check valve and the third spring pre-tightening check valve, the second spring Pre-loaded one-way valve and the 4th oil inlet and described
Pipeline connection between 5th oil outlet, the third spring pre-tightening check valve and the 4th oil outlet and the 5th oil inlet
Pipeline connection between mouthful.
4. electromechanical static pressure actuating system according to claim 3, which is characterized in that
Second valve group further includes first flowmeter, second flowmeter and side and connects branch,
The first flowmeter is mounted in the connecting pipe of the 4th oil inlet and the 5th oil outlet, second flowmeter installation
In the connecting pipe of the 4th oil outlet and the 5th oil inlet, the first flowmeter and the second flowmeter are surveyed respectively
Amount flows through the flow of two chamber of hydraulic cylinder,
The side connects branch and includes sequentially connected third valve, third flowmeter and the 4th valve, and the side meets the one of branch
End is connected between the 4th oil inlet and the first flowmeter, and the other end that the side connects branch is connected to the described 4th
Between oil outlet and the second flowmeter.
5. electromechanical static pressure actuating system according to claim 3, which is characterized in that
Second valve group further includes the first overflow valve and the second overflow valve, and first overflow valve connects second accumulator
With the pipeline between the 4th oil inlet and the 5th oil outlet, second overflow valve connect second accumulator with
Pipeline between 4th oil outlet and the 5th oil inlet.
6. electromechanical static pressure actuating system according to claim 1, which is characterized in that
Every high-pressure pre-tighten branch further includes throttle valve and pressure gauge, and the first end of first accumulator connects the pressure
Power table, the pressure gauge connect the throttle valve, and the throttle valve connects the first end of first valve.
7. electromechanical static pressure actuating system according to claim 2, which is characterized in that
Every high-pressure pre-tighten branch further includes two check valves, and two check valves are connected to first accumulator
Between second end and the second end of second valve.
8. electromechanical static pressure actuating system according to claim 2, which is characterized in that
The auxiliary pump group discontinuous operation, reduces in the hydraulic variable displacement pump oil return line and the oil liquid pressure of oil outlet pipe
20%, alternatively, when needing to reset oil liquid pressure, start work, remaining time is standby.
9. electromechanical static pressure actuating system according to claim 2, which is characterized in that
The electromechanical static pressure actuating system further includes platform and rack, the servo motor, the hydraulic variable displacement pump, described first
Valve group and the hydraulic cylinder are fixed on the platform, and the platform is fixed on the upside of the rack, are installed on the downside of the rack
There is bottom plate, the auxiliary pump group is fixed on the bottom plate.
10. electromechanical static pressure actuating system according to claim 9, which is characterized in that
The platform is T-slot platform, and the servo motor is fixed on motor cabinet, and the motor cabinet is fixed with the platform to be connected
It connects, the hydraulic variable displacement pump is fixed on pump seat, and the pump seat is fixedly connected with the platform.
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| CN201711383900.9A CN108194433A (en) | 2017-12-20 | 2017-12-20 | Electromechanical static pressure actuating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869437A (en) * | 2018-08-22 | 2018-11-23 | 北京精密机电控制设备研究所 | A kind of naval vessel electromechanical static pressure control unit |
| CN109854808A (en) * | 2019-01-22 | 2019-06-07 | 北京精密机电控制设备研究所 | A kind of highly integrated formula electromechanical static pressure driving device |
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| CN104114879A (en) * | 2011-10-21 | 2014-10-22 | 卡特彼勒公司 | Closed-Loop Hydraulic System Having Flow Combining and Recuperation |
| CN107461516A (en) * | 2017-08-02 | 2017-12-12 | 北京航空航天大学 | A kind of differential type electric-hydraulic proportion uniform-pressure-drop valve |
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| CN104114879A (en) * | 2011-10-21 | 2014-10-22 | 卡特彼勒公司 | Closed-Loop Hydraulic System Having Flow Combining and Recuperation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108869437A (en) * | 2018-08-22 | 2018-11-23 | 北京精密机电控制设备研究所 | A kind of naval vessel electromechanical static pressure control unit |
| CN109854808A (en) * | 2019-01-22 | 2019-06-07 | 北京精密机电控制设备研究所 | A kind of highly integrated formula electromechanical static pressure driving device |
| CN109854808B (en) * | 2019-01-22 | 2020-10-23 | 北京精密机电控制设备研究所 | Highly integrated type electromechanical static pressure driving device |
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Application publication date: 20180622 |