CN101700763A - Engineering machine control device of hydrostatic drive walking system - Google Patents

Engineering machine control device of hydrostatic drive walking system Download PDF

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Publication number
CN101700763A
CN101700763A CN200910228675A CN200910228675A CN101700763A CN 101700763 A CN101700763 A CN 101700763A CN 200910228675 A CN200910228675 A CN 200910228675A CN 200910228675 A CN200910228675 A CN 200910228675A CN 101700763 A CN101700763 A CN 101700763A
Authority
CN
China
Prior art keywords
walking
pump
motor
pilot operated
operated directional
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.)
Pending
Application number
CN200910228675A
Other languages
Chinese (zh)
Inventor
陈胜奇
张一凡
宋洪均
马琳
陈栋
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.)
TIANJIN DINGSHENG CONSTRUCTION MACHINERY CO Ltd
Original Assignee
TIANJIN DINGSHENG CONSTRUCTION MACHINERY 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 TIANJIN DINGSHENG CONSTRUCTION MACHINERY CO Ltd filed Critical TIANJIN DINGSHENG CONSTRUCTION MACHINERY CO Ltd
Priority to CN200910228675A priority Critical patent/CN101700763A/en
Publication of CN101700763A publication Critical patent/CN101700763A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an engineering machine control device of a hydrostatic drive walking system, which is provided with a walking pump, a walking motor and a hydraulic control reversal valve, wherein the walking motor and the hydraulic control reversal valve are connected in parallel, a first working oil port of the walking pump is divided into two paths, one path is connected with the hydraulic control reversal valve, and the other path is connected with the walking motor; a second working oil port of the walking pump is divided into three paths, wherein the first path is connected with the hydraulic control reversal valve, the second path is connected with the walking motor, and the third path is used for controlling pressure oil and is connected with a control oil port of the hydraulic control reversal valve by an electromagnetic valve. The hydraulic control reversal valve is connected among the two working oil ports of the walking pump and the walking motor in parallel and is controlled by the electromagnetic valve. When moving forwards, the invention can automatically realize the automatic switching-on and switching-off of an oil path according to a pressure change in a closed type loop, reduce the impact and enhance the walking smoothness of a vehicle. The motor can be in a free state when a throttle is lowered, the vehicle moves forwards by means of inertia, the phenomenon of vehicle obstruction is lightened, and the smoothness, the comfort and the safety for driving the vehicle are enhanced.

Description

The engineering machine control device of hydrostatic drive walking system
Technical field
The present invention relates to a kind of engineering machine control device.Particularly relating to a kind of engineering machinery walking system to hydrostatic drive walking has good regulating action, and the driving that makes this machinery is the engineering machine control device of the hydrostatic drive walking system of safety and comfort more.
Background technology
The basic control mode of the running gear of existing hydraulic walking type vehicle is: controller is by the rotating speed of tachogenerator detection of engine, regulate the size of the control current of walking pump according to feedback signal, to reach the purpose of control walking pump discharge capacity, finally control the speed of a motor vehicle.The advantage of this mode is that walking capacity of pump and engine speed are well mated, and particularly can be good at improving hydraulic efficiency pressure system efficient when improving the speed of a motor vehicle increasing engine speed.
But there is certain defective in this mode: the Das Gaspedal of driving engine is lifted when the speed of a motor vehicle is higher relatively, when promptly reducing throttle fast, because the rotating speed of driving engine descends and corresponding the reducing of swash plate pivot angle of pump, can cause capacity of pump to become the power exponent level to reduce, because the higher original speed of a motor vehicle, vehicle has very big inertia, HM Hydraulic Motor becomes the work of main pump operating mode, cause the vehicle power braking, the speed of a motor vehicle that do not touch on the brake reduces also very fast, more serious " car " phenomenon occurs, thereby had a strong impact on ride comfort, traveling comfort and the safety of vehicular drive.
Summary of the invention
Technical matters to be solved by this invention is, provides a kind of simple in structure, handling strong, can improve the engineering machine control device of hydrostatic drive walking system of ride comfort, traveling comfort and the safety of vehicular drive.
The technical solution adopted in the present invention is: a kind of engineering machine control device of hydrostatic drive walking system, include walking pump and running motor, also include pilot operated directional control valve, wherein, running motor and pilot operated directional control valve are for being connected in parallel, first actuator port of described walking pump divides two-way, and one the tunnel links to each other with pilot operated directional control valve, and another road links to each other with running motor; Second actuator port of described walking pump divides three the tunnel, and wherein the first via links to each other with pilot operated directional control valve, and the second the tunnel links to each other with running motor, and it is to link to each other with the control port of pilot operated directional control valve by electromagnetic valve that Third Road is used for control presssure oil.
Described pilot operated directional control valve is connected in parallel between two actuator ports of walking pump and the running motor and by solenoid control.
The engineering machine control device of hydrostatic drive walking system of the present invention, by pilot operated directional control valve in parallel with CD-ROM drive motor, when advancing, can change the auto switching of realizing oil circuit according to pressure in the closed circuit automatically, reduce and impact, promote the ride comfort of vehicle to run.There is good regulating action in engineering machinery walking system to the hydrostatic drive walking, can make motor be in free state when reducing throttle, vehicle relies on inertia to advance, alleviate " car " phenomenon, the ride comfort, traveling comfort and the safety that improve vehicular drive.What the present invention can improve product greatly can be handling, have simple in structure, real-time good, handling by force, the advantage of hommization more, can be widely used on various engineering vehicle and the construction machinery and equipment.
Description of drawings
Fig. 1 is an integral structure scheme drawing of the present invention.
Label among the figure is respectively:
The 1-walking pump; The 2-pilot operated directional control valve; The 3-electromagnetic valve; The 4-running motor; 5-first actuator port; 6-second actuator port; The 7-fuel tank; The 8-motor; The 9-slippage pump; The 10-controllable capacity pump; The 11-proportion magnetic valve; 12-oil circuit control unit; The 13-by pass valve; The 14-change-over valve.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. to describe the engineering machine control device of hydrostatic drive walking system of the present invention in detail as follows:
As shown in Figure 1, the engineering machine control device of hydrostatic drive walking system of the present invention is on the basis of traditional closed circuit and motor pilot operated directional control valve in parallel, the current intelligence of pressure oil during the control working direction.Specifically include the walking pump 1 that is used to provide power fluid, be used to drive the running motor 4 of running gear, and pilot operated directional control valve 2.Described walking pump 1 is connected fuel tank 7 respectively with running motor 4.
Wherein, running motor 4 and pilot operated directional control valve 2 are for being connected in parallel, and described pilot operated directional control valve 2 is connected in parallel between two actuator ports 5,6 and running motor 4 of walking pump 1.5 fens two-way of first actuator port of described walking pump 1, the one tunnel links to each other with pilot operated directional control valve 2, and another road links to each other with running motor 4; Second actuator port of described walking pump 16 minutes three tunnel, wherein the first via links to each other with pilot operated directional control valve 2, and the second the tunnel links to each other with running motor 4, and it is to link to each other by the control port of electromagnetic valve 3 with pilot operated directional control valve 2 that Third Road is used for control presssure oil.
The working process of the engineering machine control device of hydrostatic drive walking system of the present invention:
Fluid directly passes to running motor from walking pump when advancing, running motor is rotated, and powered vehicle is advanced, and low pressure oil passes to the oil suction of walking pump from running motor, enter the high pressure oil side once more through after the supercharging of walking pump, so circulation realizes the normal operation of closed system.When throttle increased, controller (electric system element) increased flow system flow according to the discharge capacity that engine speed is transferred big walking pump 1, and the speed of a motor vehicle increases, and realizes the real-time control of throttle; When throttle descends, controller is turned the discharge capacity of walking pump 1 down according to engine speed, flow system flow is reduced rapidly, at this moment, running motor 4 rotates with former speed, the effect that has pump according to the characteristics running motor 4 (for piston motor) of enclosed hydrostatic drive, get hydraulic oil from the high pressure oil side draught and be discharged into the low pressure oil side, and the fluid of low pressure oil side forms " collecing oil " phenomenon at the low pressure skidding because the flow of pump reduces, cause the low pressure oil lateral pressure to raise, when pressure reaches pilot operated directional control valve 2 control presssures, pilot operated directional control valve 2 is opened, and running motor 4 is owing to being in free state by " short circuit ", and vehicle moves under effect of inertia, thereby reduce or avoid the phenomenon of " receiving an oil car ", promptly promoted the ride comfort of the walking of vehicle.At this moment, walking pump 1 oil inlet and outlet communicates, and load approaches zero, and pressure minimizing fast approaches zero, and when pressure was lower than the pilot operated directional control valve control presssure, pilot operated directional control valve was closed the cut-out oil circuit, and whole closed system can normal operation.
During reversing, the energising of the electromagnet of electromagnetic valve 3, the pilot operated directional control valve control oil channel is cut off in electromagnetic valve transposition work, and pilot operated directional control valve cuts off oil circuit all the time, realizes the normal reversing of this machinery.When the ramp glides, be in closed condition by electric switch formula electromagnetic valve, the speed of a motor vehicle is out of control when preventing vehicle slip-down.

Claims (2)

1. the engineering machine control device of a hydrostatic drive walking system, include walking pump (1) and running motor (4), it is characterized in that, also include pilot operated directional control valve (2), wherein, running motor (4) and pilot operated directional control valve (2) are for being connected in parallel, and first actuator port (5) of described walking pump (1) divides two-way, one the tunnel links to each other with pilot operated directional control valve (2), and another road links to each other with running motor (4); Second actuator port (6) Fen Sanlu of described walking pump (1), wherein the first via links to each other with pilot operated directional control valve (2), the second the tunnel links to each other with running motor (4), and it is to link to each other by the control port of electromagnetic valve (3) with pilot operated directional control valve (2) that Third Road is used for control presssure oil.
2. the engineering machine control device of hydrostatic drive walking system according to claim 1, it is characterized in that described pilot operated directional control valve (2) is connected in parallel between two actuator ports (5,6) of walking pump (1) and the running motor (4) and by electromagnetic valve (3) and controls.
CN200910228675A 2009-11-24 2009-11-24 Engineering machine control device of hydrostatic drive walking system Pending CN101700763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910228675A CN101700763A (en) 2009-11-24 2009-11-24 Engineering machine control device of hydrostatic drive walking system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910228675A CN101700763A (en) 2009-11-24 2009-11-24 Engineering machine control device of hydrostatic drive walking system

Publications (1)

Publication Number Publication Date
CN101700763A true CN101700763A (en) 2010-05-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN200910228675A Pending CN101700763A (en) 2009-11-24 2009-11-24 Engineering machine control device of hydrostatic drive walking system

Country Status (1)

Country Link
CN (1) CN101700763A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102229328A (en) * 2011-05-05 2011-11-02 四川大学 Vehicle mechanical energy-saving hydraulic system with multi-pump confluence
CN103047203A (en) * 2013-01-05 2013-04-17 三一重工股份有限公司 Hydraulic drive system and construction machinery
CN103244476A (en) * 2013-04-18 2013-08-14 宝鸡南车时代工程机械有限公司 Railway track operating vehicle with closed static-pressure travelling system
CN106795896A (en) * 2014-10-10 2017-05-31 川崎重工业株式会社 The oil pressure actuated systems of building machinery

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102229328A (en) * 2011-05-05 2011-11-02 四川大学 Vehicle mechanical energy-saving hydraulic system with multi-pump confluence
CN102229328B (en) * 2011-05-05 2013-05-08 四川大学 Vehicle mechanical energy-saving hydraulic system with multi-pump confluence
CN103047203A (en) * 2013-01-05 2013-04-17 三一重工股份有限公司 Hydraulic drive system and construction machinery
CN103047203B (en) * 2013-01-05 2015-09-09 三一重工股份有限公司 A kind of hydraulic driving system and engineering machinery
CN103244476A (en) * 2013-04-18 2013-08-14 宝鸡南车时代工程机械有限公司 Railway track operating vehicle with closed static-pressure travelling system
CN106795896A (en) * 2014-10-10 2017-05-31 川崎重工业株式会社 The oil pressure actuated systems of building machinery

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Open date: 20100505