CN203532367U - Multi-gear power control variable displacement piston pump - Google Patents

Multi-gear power control variable displacement piston pump Download PDF

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Publication number
CN203532367U
CN203532367U CN201320562685.XU CN201320562685U CN203532367U CN 203532367 U CN203532367 U CN 203532367U CN 201320562685 U CN201320562685 U CN 201320562685U CN 203532367 U CN203532367 U CN 203532367U
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CN
China
Prior art keywords
valve
variable
control
control valve
communicated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201320562685.XU
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Chinese (zh)
Inventor
杨宗平
陈新雁
曹捷
罗成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AVIC Liyuan Hydraulic Co Ltd
Original Assignee
AVIC Liyuan Hydraulic Co Ltd
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Filing date
Publication date
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Priority to CN201320562685.XU priority Critical patent/CN203532367U/en
Application granted granted Critical
Publication of CN203532367U publication Critical patent/CN203532367U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a multi-gear power control variable displacement piston pump, and belongs to a variable displacement piston pump. The multi-gear power control variable displacement piston pump can be matched with multiple gears to output power according to different working conditions. The multi-gear power control variable displacement piston pump comprises a variable displacement piston pump body and a control device. The control device is composed of a variable oil cylinder (2), a spring (3), a control valve (4), a measuring valve, an electromagnetic proportional pressure reducing valve (10) and a gear pump (12). The measuring valve is composed of a valve sleeve (5) and a valve core (8). The spring (3) is connected between a piston rod and the control valve (4), the valve core (8) is connected with the control valve (4), and a displacement regulating mechanism (9) is connected with the piston rod. The variable displacement piston pump body (1) is communicated with a rod cavity, a working oil port of the control valve (4) and a pressure measurement opening (6), a rodless cavity is communicated with the other working oil port of the control valve (4), and the gear pump (12) is communicated with a measuring cavity (7) through the electromagnetic proportional pressure reducing valve (10).

Description

Many grades of power variable control plunger pumps
Technical field
The utility model relates to a kind of Variable plunger pump, relates in particular to a kind of Variable plunger pump that many grades of power adjustments are controlled that carries out.
Background technique
Rotating speed is high because having for plunger pump, pressure is large, compact structure and be easy to the many advantages such as Variable Control and extensively transported employing by all kinds of Hydraulic Power Transmission Systems.Along with the development of the technology such as engineering machinery, mining machinery, automobile making, the hydraulic element of hydraulic system have also been proposed to the requirements such as proportional control, servocontrol, stepless speed regulation.As everyone knows, the working condition of the working host such as engineering machinery, mining machinery is very complicated, and variable piston pump delivery adopts single power to control working method conventionally at present, can not adapt to working host according to the requirement of the desirable output power of different operating mode real-time matchings.For this reason, application number is the device that application for a patent for invention file that " 200910057171.7 ", name are called " control system of plunger variable pump " discloses a kind of adjustable variables power of plunger pump, although this device can regulate control to variable piston pump power, pressure and flow, this scheme more complicated.
Summary of the invention
For the above-mentioned defect existing in prior art, the utility model aim to provide a kind of simple in structure, can mate many grades of power variable control plunger pumps of desirable output power according to the different operating modes of working host.
To achieve these goals, the utility model by the following technical solutions: it comprises Variable plunger pump and control gear; Described control gear consists of variable oil cylinder, spring, control valve, measurement valve, solenoid-operated proportional reduction valve and gear pump, described measurement valve by be provided with pressure measurement mouth and measure the valve pocket in chamber, the spool being located in this valve pocket forms; Wherein, spring is connected between control valve and the piston rod of variable oil cylinder, and spool is connected with control valve, and variable piston pump delivery controlling mechanism is connected with described piston rod; Variable piston delivery side of pump respectively with the rod chamber of variable oil cylinder, the actuator port of control valve and pressure measurement mouth be communicated with, the rodless cavity of variable oil cylinder is communicated with another actuator port of control valve, and gear delivery side of pump is communicated with measurement chamber by solenoid-operated proportional reduction valve.
Gear delivery side of pump is provided with the relief valve being communicated with solenoid-operated proportional reduction valve.
Compared with the prior art, the utility model is owing to having adopted technique scheme, when load changes, control valve is adjusted the aperture of actuator port in real time by the thrust of its suffered spring force in left side of continuous comparison and its right side spool, thereby variable piston pump delivery is controlled, made plunger pump all the time in permanent power working state.Moreover, owing to having adopted solenoid-operated proportional reduction valve, therefore changing electric current can regulate variable piston pump delivery very easily, thereby can realize many gears power to Variable plunger pump very easily, controls.The utility model is simple in structure, not only can significantly improve the power utilization of Variable plunger pump, and realizes digitizing and intelligent control.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: Variable plunger pump 1 variable oil cylinder 2 spring 3 control valve 4 valve pocket 5 pressure measurement mouths 6 are measured chamber 7 spool 8 discharge capacity controlling mechanism 9 solenoid-operated proportional reduction valve 10 relief valve 11 gear pumps 12.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:
As shown in Figure 1: control gear consists of variable oil cylinder 2, spring 3, control valve 4, measurement valve, solenoid-operated proportional reduction valve 10 and gear pump 12; The valve pocket 5 that described measurement valve is shoulder hole by inwall, be located in this valve pocket and form with the spool 8 of this shoulder hole Spielpassung, in valve pocket 5, be provided with and measure chamber 7, this valve pocket is provided with pressure measurement mouth 6.The piston of variable oil cylinder 2 is connected with the left end of control valve 4 by spring 3, and the right-hand member of this control valve is connected with spool 8, and the discharge capacity controlling mechanism 9 of Variable plunger pump 1 is connected with described piston rod.The outlet of Variable plunger pump 1 is communicated with the rod chamber of variable oil cylinder 2, the actuator port that is positioned at control valve 4 upper ends, pressure measurement mouth 6 respectively by oil pipe, the rodless cavity of variable oil cylinder 2 is communicated with the actuator port that is positioned at control valve 4 lower ends by oil pipe, and the outlet of gear pump 12 is communicated with measurement chamber 7 by solenoid-operated proportional reduction valve 10.
For safety, in the outlet port of gear pump 12, be provided with the relief valve 11 being communicated with solenoid-operated proportional reduction valve 10.
Working principle: during Variable plunger pump 1 initialization, under the pressure adjusting spring acting in conjunction that control valve 4 carries at spring 3 and this control valve 4 in left position; The now outlet of described rod chamber and Variable plunger pump 1 is connected, and described rodless cavity is communicated with oil return pond by control valve 4, and described piston rod movement is to left end, and now Variable plunger pump 1 is exported maximum pump discharge.When load increases, the pressure of pressure measurement mouth 6 increases thereupon, spool 8 overcomes spring force and promotes control valve 4 and is moved to the left gradually, the aperture of the valve opening (not shown) of the left position of control valve 4 reduces, the pressure of rodless cavity increases, piston rod moves right, Variable plunger pump 1 output discharge capacity reduces, until reach the power-balance variable position setting.When the pressure of pressure measurement mouth 6 continues to increase with load increase, spool 8 just can promote control valve 4 and be moved to the left and switch to right position work (being shown position), and the outlet of Variable plunger pump 1 is communicated with rodless cavity; Because the pressure of rodless cavity is greater than the pressure of rod chamber, piston rod moves right, the output discharge capacity of Variable plunger pump 1 reduces, until Variable plunger pump 1 reaches the power-balance variable position setting.Meanwhile, piston rod promotes control valve 4 by spring 3 and moves right, and the aperture of the valve opening (not shown) of the right position of control valve 4 reduces, the pressure of rodless cavity reduces, until reach the power-balance variable position setting.Along with the variation of load, control valve 4 is the dynamic balance state in the suffered spring force of its left end of continuous comparison and the suffered hydraulic coupling of right-hand member all the time, so Variable plunger pump 1 is in permanent power working state.
When the outlet pressure of solenoid-operated proportional reduction valve 10 rises, the pressure in measurement chamber 7 promotes spool 8 and is moved to the left thereupon increasing, so broken the current permanent power rating of being set by pressure adjusting spring.Under the constant state of Variable plunger pump 1 outlet pressure, control valve 4 is increased by active force left, and Variable plunger pump 1 reduces output discharge capacity until control valve 4 reaches a new permanent power-balance state; The input current of adjusting solenoid-operated proportional reduction valve 10 just can be realized many grades of power of plunger pump and control.

Claims (2)

1. more than a grade of power variable control plunger pump, comprises Variable plunger pump and control gear; It is characterized in that: described control gear by variable oil cylinder (2), spring (3), control valve (4), measure valve, solenoid-operated proportional reduction valve (10) and gear pump (12) and form, described measurement valve by be provided with pressure measurement mouth (6) and measure chamber (7) valve pocket (5), be located at spool (8) formation in this valve pocket; Wherein, spring (3) is connected between control valve (4) and the piston rod of variable oil cylinder (2), and spool (8) is connected with control valve (4), and the discharge capacity controlling mechanism (9) of Variable plunger pump (1) is connected with described piston rod; The outlet of Variable plunger pump (1) is communicated with the rod chamber of variable oil cylinder (2), the actuator port of control valve (4) and pressure measurement mouth (6) respectively, the rodless cavity of variable oil cylinder (2) is communicated with another actuator port of control valve (4), and the outlet of gear pump (12) is communicated with measurement chamber (7) by solenoid-operated proportional reduction valve (10).
2. many grades of power variable control plunger pumps according to claim 1, is characterized in that: the outlet of gear pump (12) is provided with the relief valve (11) being communicated with solenoid-operated proportional reduction valve (10).
CN201320562685.XU 2013-09-11 2013-09-11 Multi-gear power control variable displacement piston pump Expired - Lifetime CN203532367U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320562685.XU CN203532367U (en) 2013-09-11 2013-09-11 Multi-gear power control variable displacement piston pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320562685.XU CN203532367U (en) 2013-09-11 2013-09-11 Multi-gear power control variable displacement piston pump

Publications (1)

Publication Number Publication Date
CN203532367U true CN203532367U (en) 2014-04-09

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Family Applications (1)

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CN201320562685.XU Expired - Lifetime CN203532367U (en) 2013-09-11 2013-09-11 Multi-gear power control variable displacement piston pump

Country Status (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103511369A (en) * 2013-09-11 2014-01-15 中航力源液压股份有限公司 Multi-gear power control variable piston pump
CN106438527A (en) * 2016-11-16 2017-02-22 中航力源液压股份有限公司 Flow compensation method and flow compensation device for proportional control pump
CN106762970A (en) * 2016-12-26 2017-05-31 中航力源液压股份有限公司 Double ratio control structures and control method of a kind of variable displacement motor
CN109854471A (en) * 2019-02-01 2019-06-07 中航力源液压股份有限公司 The hydraulic planger pump of two grades of power control devices
CN109854471B (en) * 2019-02-01 2024-05-14 中航力源液压股份有限公司 Hydraulic plunger pump of two-gear power control device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103511369A (en) * 2013-09-11 2014-01-15 中航力源液压股份有限公司 Multi-gear power control variable piston pump
CN106438527A (en) * 2016-11-16 2017-02-22 中航力源液压股份有限公司 Flow compensation method and flow compensation device for proportional control pump
CN106438527B (en) * 2016-11-16 2018-10-16 中航力源液压股份有限公司 The flow-compensated method and flow compensation device of ratio control pump
CN106762970A (en) * 2016-12-26 2017-05-31 中航力源液压股份有限公司 Double ratio control structures and control method of a kind of variable displacement motor
CN106762970B (en) * 2016-12-26 2019-06-28 中航力源液压股份有限公司 A kind of double ratio control structures and control method of variable displacement motor
CN109854471A (en) * 2019-02-01 2019-06-07 中航力源液压股份有限公司 The hydraulic planger pump of two grades of power control devices
CN109854471B (en) * 2019-02-01 2024-05-14 中航力源液压股份有限公司 Hydraulic plunger pump of two-gear power control device

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Assignee: Suzhou Liyuan Hydraulic Co.,Ltd.

Assignor: AVIC LIYUAN HYDRAULIC Co.,Ltd.

Contract record no.: X2023520000038

Denomination of utility model: Multi speed power control variable piston pump

Granted publication date: 20140409

License type: Exclusive License

Record date: 20230627

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20140409