CN106762920B - A kind of hydraulic system with powershift valve - Google Patents

A kind of hydraulic system with powershift valve Download PDF

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Publication number
CN106762920B
CN106762920B CN201710179942.4A CN201710179942A CN106762920B CN 106762920 B CN106762920 B CN 106762920B CN 201710179942 A CN201710179942 A CN 201710179942A CN 106762920 B CN106762920 B CN 106762920B
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CN
China
Prior art keywords
valve
powershift
pump
actuator
oil
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CN201710179942.4A
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Chinese (zh)
Other versions
CN106762920A (en
Inventor
郑枫川
宋杰
吴站伟
冯军峰
强德军
胡选革
吴广成
Original Assignee
陕西奥力信工程机械有限公司
中铁电气化局集团有限公司西安电务工程分公司
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Priority to CN201710179942.4A priority Critical patent/CN106762920B/en
Publication of CN106762920A publication Critical patent/CN106762920A/en
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Publication of CN106762920B publication Critical patent/CN106762920B/en

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Abstract

The present invention relates to high-altitude operation vehicle technical fields, a kind of hydraulic system with powershift valve is specifically disclosed, including hydraulic actuator, engine, enclosed driven by the engine pump, enclosed pump is connected to by powershift valve and electromagnetic switch valve group with hydraulic actuator.The invention has the advantages that powershift valve is applied in hydraulic system, two sets of hydraulic control systems can be controlled by powershift valve, cost substantially reduces, so that the volume of equipment reduces.

Description

A kind of hydraulic system with powershift valve

Technical field

The present invention relates to technical field of engineering machinery, particularly relate to a kind of hydraulic system with powershift valve.

Background technique

Application in existing Hydraulic Power Transmission System is that a control system drives an actuator.When equipment needs newly Movement when, it is necessary to again plus set of system, cause equipment cost to greatly improve, volume is bigger.In order to realize two sets of control systems The switching of system, the valve are applied and are given birth to.

Summary of the invention

The object of the present invention is to provide a kind of hydraulic systems with powershift valve, powershift valve are applied to hydraulic In system, two sets of hydraulic control systems can be controlled by powershift valve, cost substantially reduces, so that the volume of equipment subtracts It is small.

To achieve the goals above, present invention employs technical solutions below: a kind of with the hydraulic of powershift valve System, including hydraulic actuator, engine, enclosed driven by the engine pump, enclosed pump by the powershift valve and Electromagnetic switch valve group is connected to hydraulic actuator;

The powershift valve includes two and connects pump oil mouth (A, B), four actuator ports (A1, A2, B1, B2), with two Connect a pair of of pilot operated directional control valve that pump oil mouth (A, B) is correspondingly connected with;

The pilot operated directional control valve all have oil inlet 3., the first oil outlet 2., the second oil outlet 4., control oil inlet 3. with First oil outlet 2. or the second oil outlet 4. on-off control port 1.;

3. the oil inlet of the pilot operated directional control valve respectively corresponds connection two and meets pump oil mouth (A, B);

1. the control port of the pilot operated directional control valve is communicated with an external tapping (X).

Wherein, a hand-operated direction valve is equipped between the oil inlet pipe for meeting pump oil mouth (A, B) at described two.

Wherein, slippage pump is equipped in the enclosed pump and control the proportion magnetic valve of hydraulic actuator positive and negative rotation.

Wherein, the hydraulic actuator includes the first actuator and the second actuator.

Wherein, two oil outlets (C, D) of enclosed pump by the two of fluid pressure line and powershift valve connect pump oil mouth (A, B it) is connected to;

The actuator port (A1, B1) of the powershift valve by two hydraulic fluid ports of fluid pressure line and the first actuator (G, H) be connected to, the actuator port (A2, B2) of the powershift valve 1 by two hydraulic fluid ports of fluid pressure line and the second actuator (E, F it) is connected to;

The Fa mouth of the slippage pump is connected to by fluid pressure line with the P mouthfuls of threeways of electromagnetic switch valve group, and the Fe mouth of enclosed pump is logical It crosses fluid pressure line to be connected to the P mouthfuls of threeways of electromagnetic switch valve group, P1 mouthfuls of electromagnetic switch valve group pass through fluid pressure line and powershift valve External tapping (X) communicate.

Have small in size the beneficial effects of the present invention are: the powershift valve, facilitates installation, 2 pilot operated directional control valves change Low to pressure, use scope is wide, and covering surface is big, can be used in vehicle and equipment with two sets of control systems.

This powershift valve is applied in hydraulic system, two sets of hydraulic control systems can be controlled by powershift valve System, finally controls two sets of control systems by a power source, cost substantially reduces, so that the volume of equipment reduces.

Detailed description of the invention

Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the present invention in order to illustrate more clearly of this hair Bright embodiment or technical solution in the prior art, below will be p- required for describing the embodiments or the prior art attached Figure is briefly described, for those of ordinary skill in the art, without creative efforts, can be with root Other attached drawings are obtained according to these attached drawings.

Fig. 1 is the structural schematic diagram of powershift valve;

Fig. 2 is that powershift valve is applied to the structural schematic diagram in hydraulic system.

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.

A kind of powershift valve as shown in Figure 1, including two connect pump oil mouth (A, B), four actuator ports (A1, A2, B1, B2), a pair of of pilot operated directional control valve (3) that pump oil mouth (A, B) is correspondingly connected with is connect with two;

The pilot operated directional control valve 3 all have oil inlet 3., the first oil outlet 2., the second oil outlet 4., control oil inlet 3. With the first oil outlet 2. or the second oil outlet 4. on-off control port 1.;

3. the oil inlet of the pilot operated directional control valve 3 respectively corresponds connection two and meets pump oil mouth (A, B);

1. the control port of the pilot operated directional control valve 3 is communicated with an external tapping (X).

A hand-operated direction valve 2 is equipped between the oil inlet pipe that described two meet pump oil mouth (A, B).

Be illustrated first to the technical solution of powershift valve 1: under normal circumstances, main working oil path passes through powershift Valve 1A, B oil inlet are to pilot operated directional control valve 3, and on normality position, 3. 2. the oil inlet of pilot operated directional control valve 3 is communicated with the first oil outlet, hydraulic control 2. first oil outlet of reversal valve 3 passes through oil duct and communicates with A2, B2 mouthfuls of actuator port, A2, B2 mouthfuls it is fuel-displaced driving one of them hold The completion of row device executes movement.

When needing to be implemented remaining movement, guide oil passes through integrated valve group internal galleries and left and right liquid controlled reversing by X, X 1. mouth communicates valve 3, and 1. guide oil passes through the control port of driving left and right pilot operated directional control valve 3, and then pilot operated directional control valve 3 is driven to change After commutating to, pilot operated directional control valve 3,3. 4. the oil inlet of pilot operated directional control valve 3 is communicated with the second oil outlet, and the of pilot operated directional control valve 3 4. two oil outlets pass through A1, B1 mouthfuls of other two actuator port conductings of internal galleries and powershift valve 1, another is driven to hold Row device executes.To realize the actuator handoff functionality in closed system.

The effect that a hand-operated direction valve 2 is integrated in switching valve in the closed system is when actuator goes wrong It is to allow hand-operated direction valve 2 to commutate by manual operation, conducting working connection A, B are communicated, and facilitate maintenance of equipment.

Secondly be illustrated to the concrete application of the powershift valve 1 in hydraulic system: one kind is with powershift valve Hydraulic system, including hydraulic actuator, engine 4, the enclosed pump 5 driven by engine 4, enclosed pump 5 passes through described dynamic Power switching valve 1 and electromagnetic switch valve group 8 are connected to hydraulic actuator.

Slippage pump 7 is equipped in the enclosed pump 5 and controls the proportion magnetic valve 6 of hydraulic actuator positive and negative rotation.

The hydraulic actuator includes the first actuator 9 and the second actuator 10.

Two oil outlets (C, D) of the enclosed pump 5 meet pump oil mouth (A, B) by the two of fluid pressure line and powershift valve 1 Connection;

The actuator port (A1, B1) of the powershift valve 1 passes through two hydraulic fluid ports of fluid pressure line and the first actuator 9 (G, H) connection, the actuator port (A2, B2) of the powershift valve 1 pass through two oil of fluid pressure line and the second actuator 10 Mouth (E, F) connection;

The Fa mouth of the slippage pump 7 is connected to by fluid pressure line with the 8P mouthfuls of threeways of electromagnetic switch valve group, the Fe mouth of enclosed pump 5 It is connected to by fluid pressure line with the 8P mouthfuls of threeways of electromagnetic switch valve group, 8P1 mouthfuls of electromagnetic switch valve group are cut by fluid pressure line and power The external tapping (X) for changing valve 1 communicates.

After engine 4 starts, slippage pump 7 starts to closed system fuel feeding in enclosed pump 5, until hydraulic in closed system Pipeline is full of oil liquid, and proportion magnetic valve 6 (SV3, SV4) commutation in operation enclosed pump 5 realizes actuator motor forward or reverse (oil cylinder is stretched out or is retracted).C, D mouthfuls of oil outlet of enclosed pump 5 are connected to by fluid pressure line with powershift valve 1A, B, and power is cut It changes valve 1A1, B1, A2, B2 to be connected to by fluid pressure line with two hydraulic fluid ports of actuator, passes through liquid for 7Fa mouthfuls of slippage pump in enclosed pump 5 Pressure pipe road is connected to the 8P mouthfuls of threeways of electromagnetic switch valve group, and the Fe mouth of enclosed pump 5 is led to by fluid pressure line with solenoid valve block P mouth three Logical, P1 mouthfuls of solenoid valve block are communicated by fluid pressure line with integrated valve group X.After engine 4 starts, 5 starting of enclosed pump, enclosed pump Slippage pump 7 starts to closed system fuel feeding in 5, until 7 overflow valve overflow of slippage pump in enclosed pump 5, (when in closed system pipeline After oil liquid, enclosed pump 5 is awaited orders with regard to low pressure, according to the loss fuel feeding of closed system) solenoid valve block is in low pressure and awaits orders shape State.

When 1 normality position of powershift valve:

It operates proportion magnetic valve 6 in enclosed pump 5 to commutate to bottom, 1 normality position of powershift valve is for example above-mentioned, and high pressure oil is self-closing Formula pumps 5C mouthfuls by general pipeline to 1A mouthfuls of powershift valve, and A mouthfuls are communicated with A2 mouthfuls by powershift valve 1, powershift valve 1 Upper A2 mouthfuls of high pressure oil is communicated by general pipeline with the E mouth that the second actuator 10 is motor, and drive motor rotates forward, and F mouthfuls of motor low Pressure oil is communicated by general pipeline with 1B2 mouthfuls of powershift valve, and B mouthfuls communicate with B2 mouthfuls, and 1B mouthfuls of powershift valve pass through general pipe Road is communicated with the D mouth of enclosed pump 5, flows back to enclosed pump 5.

Operate in enclosed pump 5 that the commutation of proportion magnetic valve 6 is to upper, 1 normality position of powershift valve is for example above-mentioned, and high pressure oil is self-closing Formula pumps 5D mouthfuls by general pipeline to 1B mouthfuls of powershift valve, and B mouthfuls are communicated with B2 mouthfuls by powershift valve 1, powershift valve 1 Upper B2 mouthfuls of high pressure oil is communicated for F mouthfuls by general pipeline with 10 motor of the second actuator, drive motor reversion, E mouthfuls of low pressure oils of motor It being communicated by general pipeline with 1A2 mouthfuls of powershift valve, A mouthfuls are communicated with A2 mouthfuls by powershift valve 1, and 1A mouthfuls of powershift valve 5C mouthfuls are pumped with enclosed by general pipeline to communicate, and flow back to enclosed pump 5.

Here will the effect to slippage pump simply introduce, due to pump, motor can all have leakage, if there is no repairing system System, then system can be because leak without driving medium, Fe mouthfuls are 7 guide oil pressure oil ports of slippage pump, and Fa mouthfuls are that enclosed pump 5 is mended Oily oil inlet, powershift valve 1 commutate position when: operation 8 electromagnet of electromagnetic switch valve group commutation, 7 guide oil of slippage pump passes through benefit For the Fe mouth of oil pump 7 by fluid pressure line to 8P1 mouthfuls of electromagnetic switch valve group, 86P1 mouthfuls of electromagnetic switch valve group pass through fluid pressure line to collection At valve group X, powershift valve 1X by internal duct with 1. mouth communicates on left and right pilot operated directional control valve 3, guide oil drive left and right liquid Reversal valve 3 is controlled to commutate.

The commutation of proportion magnetic valve 6 is operated in enclosed pump 5 to bottom, high pressure oil self-closing pumps 5C mouthful by general pipeline to moving It 1A mouthfuls of power switching valve, is communicated at this time with A1 mouthfuls by powershift valve 1 for A mouthfuls, A1 mouthfuls of high pressure oils pass through general on powershift valve 1 Pipeline communicates for G mouthfuls with first 9-motor of actuator, and drive motor rotates forward, and H mouthfuls of low pressure oils of motor are cut by general pipeline with power It changes 1B1 mouthfuls of valve to communicate, B mouthfuls are communicated with B1 mouthfuls by powershift valve 1, and 1B mouthfuls of powershift valve are pumped by general pipeline and enclosed 5D mouthfuls communicate, and flow back to enclosed pump 5.

The commutation of proportion magnetic valve 6 is operated in enclosed pump 5 to upper, high pressure oil self-closing pumps 5D mouthful by general pipeline to moving 1B mouthfuls of power switching valve, B mouthfuls are communicated with B1 mouthfuls by powershift valve 1, and B1 mouthfuls of high pressure oils pass through general pipeline on powershift valve 1 It is communicated for H mouthfuls with 9 motor of the first actuator, drive motor reversion, G mouthfuls of low pressure oils of motor pass through general pipeline and powershift valve 1A1 mouthfuls communicate, and A mouthfuls are communicated with A1 mouthfuls by powershift valve 1, and 1A mouthfuls of powershift valve pump 5C mouthfuls by general pipeline and enclosed It communicates, flows back to enclosed pump 5.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (5)

1. a kind of hydraulic system with powershift valve, it is characterised in that: including hydraulic actuator, engine (4), by sending out The enclosed of motivation (4) driving pumps (5), enclosed pump (5) by the powershift valve (1) and electromagnetic switch valve group (8) with it is hydraulic Executive component connection;
The powershift valve includes two and connects pump oil mouth (A, B), four actuator ports (A1, A2, B1, B2), connects pump with two A pair of of pilot operated directional control valve (3) that hydraulic fluid port (A, B) is correspondingly connected with;
The pilot operated directional control valve (3) all have oil inlet 3., the first oil outlet 2., the second oil outlet 4., control oil inlet 3. with First oil outlet 2. or the second oil outlet 4. on-off control port 1.;
The oil inlet of the pilot operated directional control valve (3) 3. respectively corresponds connection two and meets pump oil mouth (A, B);
The control port of the pilot operated directional control valve (3) is 1. communicated with an external tapping (X).
2. a kind of hydraulic system with powershift valve according to claim 1, it is characterised in that: at described two It connects and is equipped with a hand-operated direction valve (2) between the oil inlet pipe of pump oil mouth (A, B).
3. a kind of hydraulic system with powershift valve according to claim 1, it is characterised in that: the enclosed pump (5) slippage pump (7) are equipped in and control the proportion magnetic valve (6) of hydraulic actuator positive and negative rotation.
4. a kind of hydraulic system with powershift valve according to claim 3, it is characterised in that: the hydraulic execution Element includes the first actuator (9) and the second actuator (10).
5. a kind of hydraulic system with powershift valve according to claim 4, it is characterised in that: the enclosed pump (5) two oil outlets (C, D) connect pump oil mouth (A, B) with the two of powershift valve (1) by fluid pressure line and are connected to;
The actuator port (A1, B1) of the powershift valve (1) passes through two hydraulic fluid ports of fluid pressure line and the first actuator (9) (G, H) connection, the actuator port (A2, B2) of the powershift valve (1) pass through the two of fluid pressure line and the second actuator (10) A hydraulic fluid port (E, F) connection;
The Fe mouth of the slippage pump (7) is connected to by fluid pressure line with P mouthfuls of threeways of electromagnetic switch valve group (8), and enclosed pumps the Fa of (5) Mouthful be connected to P mouthful threeways of electromagnetic switch valve group (8) by fluid pressure line, P1 mouthfuls of electromagnetic switch valve group (8) pass through fluid pressure line and The external tapping (X) of powershift valve (1) communicates.
CN201710179942.4A 2017-03-23 2017-03-23 A kind of hydraulic system with powershift valve CN106762920B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710179942.4A CN106762920B (en) 2017-03-23 2017-03-23 A kind of hydraulic system with powershift valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710179942.4A CN106762920B (en) 2017-03-23 2017-03-23 A kind of hydraulic system with powershift valve

Publications (2)

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CN106762920A CN106762920A (en) 2017-05-31
CN106762920B true CN106762920B (en) 2019-01-15

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3777114B2 (en) * 2001-11-05 2006-05-24 日立建機株式会社 Hydraulic circuit device for hydraulic working machine
JP2008032175A (en) * 2006-07-31 2008-02-14 Shin Caterpillar Mitsubishi Ltd Fluid-pressure circuit
CN202280677U (en) * 2011-09-29 2012-06-20 镇江市科能电力设备有限公司 Synchronous switching valve
CN202266536U (en) * 2011-09-29 2012-06-06 徐州重型机械有限公司 Hydraulic control valve and engineering machinery running system
CN202988660U (en) * 2012-11-04 2013-06-12 西安志越机电科技有限公司 Variation amplitude and rotary hydraulic circuit for operation arm of high-altitude operation car
CN204386981U (en) * 2014-12-31 2015-06-10 淮安威博液压有限公司 A kind of compact type moves aerial work platform power unit

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