CN2697347Y - Lever balance type constant power controller for hydraulic pump - Google Patents

Lever balance type constant power controller for hydraulic pump Download PDF

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Publication number
CN2697347Y
CN2697347Y CN 200420034277 CN200420034277U CN2697347Y CN 2697347 Y CN2697347 Y CN 2697347Y CN 200420034277 CN200420034277 CN 200420034277 CN 200420034277 U CN200420034277 U CN 200420034277U CN 2697347 Y CN2697347 Y CN 2697347Y
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CN
China
Prior art keywords
hydraulic pump
valve core
utility
model
pressure adjusting
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
CN 200420034277
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Chinese (zh)
Inventor
常真卫
苟小华
陈真炎
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.)
Liyuan Hydraulic Co., Ltd. of Aviation Industry Corporation of China
Original Assignee
Guizhou Jinjiang Aviation Hydraulic Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guizhou Jinjiang Aviation Hydraulic Co ltd filed Critical Guizhou Jinjiang Aviation Hydraulic Co ltd
Priority to CN 200420034277 priority Critical patent/CN2697347Y/en
Application granted granted Critical
Publication of CN2697347Y publication Critical patent/CN2697347Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a lever balance type constant power controller for a hydraulic pump. A variable plunger, a pressure adjusting screw, a pressure adjusting spring and a pressure adjusting valve core which are connected with a hydraulic pump sloping plate are installed on a casing. A small plunger piston is installed on the variable plunger, and a throttling hole is arranged on the variable plunger. An exit end of the throttling hole is arranged at the bottom end of the small plunger piston. The inner part of the casing and both ends of the variable plunger are respectively provided with a follow-up cavity and a follow-up cavity. The follow-up cavity is communicated with a high pressure oil exit of an axial plunger hydraulic pump and the control hole of the pressure adjusting valve core. And another follow-up cavity is communicated with the control hole of the pressure adjusting valve core. A lever is installed on a fulcrum shaft which is arranged in the casing. Both ends of the lever are contacted with the small plunger piston and the pressure adjusting valve core respectively. The utility model not only has the advantages that the high fitting level between the utility model and the hyperbola is realized, and the operating performance is reliable, but the utility model also has the advantages of simple structure and easy manufacture. The control precision of the utility model can achieve the request that the error is smaller than 3%.

Description

Lever balance-type oil hydraulic pump constant power control device
Technical field:
The utility model relates to a kind of lever balance-type oil hydraulic pump constant power control device, and particularly a kind of constant power control device of axial plunger type hydraulic pump belongs to oil hydraulic pump power control techniques field.
Background technique:
The effect of oil hydraulic pump is the kinetic energy that mechanical energy is converted to hydraulic medium, so that drive the actuation mechanism (oil hydraulic motor or pressurized strut) in hydraulic transmission or the control system.In order to improve transformation of energy and whole system efficiency of operation as much as possible, require working pressure, fuel feeding or the power of oil hydraulic pump in time to automatically adjust according to the variation of loading.Permanent power control is a kind of effective regulative mode relatively more commonly used, the oil hydraulic pump flow is reduced with the raising of pressure, make output power (with working pressure P and long-pending being directly proportional of fuel feeding Q) kept stable, promptly the P-Q curve is a hyperbola, thereby makes full use of the power of prime mover.
At present, the axial normally used constant power control device of pluger type hydraulic pump in the prior art is that the swashplate angle that relies on two variable springs and control piston pressure balance to change oil hydraulic pump is regulated, and pressure is big more, angle excursion is more little, and the flow of pump just reduces.In the limit of elasticity scope, the pressure of spring is directly proportional with compression displacement, and the slope of displacement straight line is by the rigidity decision of spring.The rigidity Design of two variable springs is become the segmented fitting of displacement rectilinear(-al), and with the P-Q contact of a curve of oil hydraulic pump, the approximate hyperbolic fit that replaces can realize the permanent power control that is similar to.Of the prior art this by the method for spring thrust Balance Control with the tangent with it hyperbolic fit of the segmented fitting replacement of two rectilinear(-al)s, its shortcoming is the permanent power control that can not realize truly, and its permanent power error maximum can reach 20%.Therefore for demanded power output fully according to the oil hydraulic pump of hyperbola control, existing this output control device just can not meet the demands.The lever moment balanced type control gear of present patent application can be realized the permanent power control with hyperbolic fit.
Summary of the invention:
The purpose of this utility model is: provide a kind of and can realize lever balance-type oil hydraulic pump constant power control device higher with the hyperbolic fit degree, reliable working performance, to overcome the deficiencies in the prior art.
The utility model is to constitute like this: it comprises the oil hydraulic pump swash plate (9) of housing (12) and axial plunger type hydraulic pump (11), housing (12) can be connected with axial plunger type hydraulic pump (11) by bolt, it is characterized in that: the variable piston (1) and the pressure regulating screw (4) that are connected with oil hydraulic pump swash plate (9) are housed on housing (12), pressure adjusting spring (5) and adjusting pressuring valve core (6), small plunger (7) is housed on variable piston (1), and on variable piston (1), be provided with throttle orifice (2), one outlet end of throttle orifice (2) is located at the bottom of small plunger (7), in housing (1), the two ends of variable piston (1) are respectively equipped with servo-actuated chamber (3) and servo-actuated chamber (8), servo-actuated chamber (3) communicates with the high pressure oil outlet of axial plunger type hydraulic pump (11) and the control hole of adjusting pressuring valve core (6), and servo-actuated chamber (8) also communicate with the control hole of adjusting pressuring valve core (6), lever (10) is installed on the interior fulcrum shaft (O) of housing (12), and its (A), (B) two ends contact with adjusting pressuring valve core (6) with small plunger (7) respectively.
Owing to adopted technique scheme, the utility model compared with prior art, the utility model not only has can realize advantage higher with the hyperbolic fit degree, reliable working performance, but also have simple in structure, make and be easy to advantage.Working principle of the present utility model is: because servo-actuated chamber (3) communicates with the high pressure oil outlet of oil hydraulic pump (11), after high pressure oil is by throttle orifice (2), act on the bottom of small plunger (7), produce action of hydraulic force (A) point on lever (10), the elastic force of pressure adjusting spring (5) acts on (B) point of lever (10) by adjusting pressuring valve core (6), when adjusting pressuring valve core (6) arrived suitable position, two power reached balance; When the outlet pressure of oil hydraulic pump raises, the hydraulic coupling that acts on small plunger (7) bottom increases, the lever moment balance is destroyed, lever (10) rotates a small angle in the counterclockwise direction around fulcrum shaft (O), and compression pressure adjusting spring (5), adjusting pressuring valve core (6) opening is strengthened, hydraulic oil enters servo-actuated chamber (8), the swash plate (9) that promotes variable piston (1) drive oil hydraulic pump moves to the direction that discharge capacity reduces, the pivot angle γ of swash plate is reduced, the drift angle of thrust plate and cylinder body reduces, and the output flow of oil hydraulic pump (11) reduces thereupon; When variable piston (1) moves, drive small plunger (7) and move to the direction that lever (10) arm of force OA reduces, make lever (10) reach new balance, vice versa.Regulate pressure regulating screw (4), can make oil hydraulic pump (11) that different working pressures is arranged when same discharge capacity, different output powers is promptly arranged, owing to pressure regulating screw (4) can be regulated arbitrarily, so the output power of oil hydraulic pump (11) can realize step-less adjustment.
Control accuracy of the present utility model can reach error less than 3% requirement.Improve control accuracy and not only made full use of the original machine power that drags oil hydraulic pump, realize step-less adjustment, and prime mover is stably moved under optimum condition, reach good energy-saving effect and prolong prime mover and the life-span of hydraulic element.In addition, the processing of the utility model and spring balancing control gear and the technological method of assembling are similar, do not increase manufacture difficulty.The utility model is applicable to the demanding axial plunger type hydraulic pump of control accuracy, for example the energy pump of the hydraulic system of aeronautics and space field and boats and ships, naval vessels, tank, battlebus and construction machinery industry use.Especially for the big load hydraulic system of high pressure (more than the 28Mpa), because power is bigger, operating mode is abominable, improves the control accuracy of permanent power, can effectively reduce the wearing and tearing and the parts heating of power loss, friction pair, improve the life-span and the reliability of prime mover and hydraulic element.The utility model also helps the employing electronic control, realizes mechanical, electrical, liquid integrated control.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
Embodiment:
Embodiment of the present utility model: housing (12) can adopt ordinary metallic material to make, during making, housing (12) can be connected with axial plunger type hydraulic pump of the prior art (11) by bolt, and the oil hydraulic pump swash plate (9) that makes axial plunger type hydraulic pump (11) can be installed in the housing (12), on housing (12), load onto the variable piston (1) and the pressure regulating screw (4) that are connected with oil hydraulic pump swash plate (9) then, pressure adjusting spring (5) and adjusting pressuring valve core (6), on variable piston (1), adorn a small plunger (7), and go up a making throttle orifice (2) at variable piston (1), one outlet end of throttle orifice (2) is located at the bottom of small plunger (7), in housing (1), the two ends of variable piston (1) are produced a servo-actuated chamber (3) and a servo-actuated chamber (8) respectively, servo-actuated chamber (3) is communicated with the high pressure oil outlet of axial plunger type hydraulic pump (11) and the control hole of adjusting pressuring valve core (6), and servo-actuated chamber (8) is also communicated with the control hole of adjusting pressuring valve core (6), lever (10) is installed on the interior fulcrum shaft (O) of housing (12), it can be rotated around fulcrum shaft (O), and make (A) of lever (10), (B) two ends can be respectively contact with adjusting pressuring valve core (6) with small plunger (7).

Claims (1)

1, a kind of lever balance-type oil hydraulic pump constant power control device, it comprises the oil hydraulic pump swash plate (9) of housing (12) and axial plunger type hydraulic pump (11), housing (12) can be connected with axial plunger type hydraulic pump (11) by bolt, it is characterized in that: the variable piston (1) and the pressure regulating screw (4) that are connected with oil hydraulic pump swash plate (9) are housed on housing (12), pressure adjusting spring (5) and adjusting pressuring valve core (6), small plunger (7) is housed on variable piston (1), and on variable piston (1), be provided with throttle orifice (2), one outlet end of throttle orifice (2) is located at the bottom of small plunger (7), in housing (1), the two ends of variable piston (1) are respectively equipped with servo-actuated chamber (3) and servo-actuated chamber (8), servo-actuated chamber (3) communicates with the high pressure oil outlet of axial plunger type hydraulic pump (11) and the control hole of adjusting pressuring valve core (6), and servo-actuated chamber (8) also communicate with the control hole of adjusting pressuring valve core (6), lever (10) is installed on the interior fulcrum shaft (O) of housing (12), and its (A), (B) two ends contact with adjusting pressuring valve core (6) with small plunger (7) respectively.
CN 200420034277 2004-04-07 2004-04-07 Lever balance type constant power controller for hydraulic pump Expired - Lifetime CN2697347Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200420034277 CN2697347Y (en) 2004-04-07 2004-04-07 Lever balance type constant power controller for hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200420034277 CN2697347Y (en) 2004-04-07 2004-04-07 Lever balance type constant power controller for hydraulic pump

Publications (1)

Publication Number Publication Date
CN2697347Y true CN2697347Y (en) 2005-05-04

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CN 200420034277 Expired - Lifetime CN2697347Y (en) 2004-04-07 2004-04-07 Lever balance type constant power controller for hydraulic pump

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352834A (en) * 2011-10-13 2012-02-15 杭州力龙液压有限公司 Constant-power control valve
CN102410166A (en) * 2011-10-13 2012-04-11 杭州力龙液压有限公司 Variable-displacement pump control device, constant-power variable-displacement pump and engineering machine
CN104234993A (en) * 2014-01-02 2014-12-24 江苏恒立液压有限公司 Hydraulic piston pump power control device and hydraulic piston pump power control method
CN105065360A (en) * 2015-08-31 2015-11-18 苏州萨伯工业设计有限公司 Constant-power control device and pressure variable control method thereof
CN107143477A (en) * 2017-06-06 2017-09-08 中国北方车辆研究所 A kind of middle position governor motion of conjuncted pump motor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352834A (en) * 2011-10-13 2012-02-15 杭州力龙液压有限公司 Constant-power control valve
CN102410166A (en) * 2011-10-13 2012-04-11 杭州力龙液压有限公司 Variable-displacement pump control device, constant-power variable-displacement pump and engineering machine
CN102410166B (en) * 2011-10-13 2014-10-15 杭州力龙液压有限公司 Variable-displacement pump control device, constant-power variable-displacement pump and engineering machine
CN102352834B (en) * 2011-10-13 2015-07-08 杭州力龙液压有限公司 Constant-power control valve
CN104234993A (en) * 2014-01-02 2014-12-24 江苏恒立液压有限公司 Hydraulic piston pump power control device and hydraulic piston pump power control method
CN105065360A (en) * 2015-08-31 2015-11-18 苏州萨伯工业设计有限公司 Constant-power control device and pressure variable control method thereof
CN107143477A (en) * 2017-06-06 2017-09-08 中国北方车辆研究所 A kind of middle position governor motion of conjuncted pump motor
CN107143477B (en) * 2017-06-06 2018-11-27 中国北方车辆研究所 A kind of middle position regulating mechanism of conjuncted pump motor

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: GUIZHOU LIYUAN HYDRAULIC CO., LTD.

Free format text: FORMER OWNER: GUIZHOU JINJIANG AIR HYDRAULIC CO., LTD.

Effective date: 20080613

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20080613

Address after: Box 99, Guiyang, Guizhou Province, 550018

Patentee after: Guizhou Liyuan Hydraulic Co., Ltd.

Address before: Guizhou city of Guiyang province new village of Beiya road 501 Factory Department of science and technology, zip code: 550018

Patentee before: Jinjiang Aviation Hydraulic Co., Ltd., Guizhou

ASS Succession or assignment of patent right

Owner name: CNAC LIYUAN HYDRAULIC CO., LTD.

Free format text: FORMER OWNER: GUIZHOU LIYUAN HYDRAULIC CO., LTD.

Effective date: 20091016

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20091016

Address after: Guizhou Liyuan Hydraulic Limited by Share Ltd, Wudang District, Guizhou City, Guiyang Province, China: 550202

Patentee after: Liyuan Hydraulic Co., Ltd. of Aviation Industry Corporation of China

Address before: Box 99, Guiyang, Guizhou Province, 550018

Patentee before: Guizhou Liyuan Hydraulic Co., Ltd.

C17 Cessation of patent right
CX01 Expiry of patent term

Expiration termination date: 20140407

Granted publication date: 20050504