CN203441851U - Load-sensitive valve block - Google Patents
Load-sensitive valve block Download PDFInfo
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- CN203441851U CN203441851U CN201320517703.2U CN201320517703U CN203441851U CN 203441851 U CN203441851 U CN 203441851U CN 201320517703 U CN201320517703 U CN 201320517703U CN 203441851 U CN203441851 U CN 203441851U
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- pressure
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- 238000006073 displacement reaction Methods 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 19
- 239000000945 filler Substances 0.000 claims description 6
- 239000002828 fuel tank Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 46
- 239000010720 hydraulic oil Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009123 feedback regulation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The utility model discloses a load-sensitive valve block. The load-sensitive valve block comprises a pressure-compensated valve and a direction and flow control device, wherein the pressure-compensated valve is communicated with an oil outlet of a variable pump, and the pressure-compensated valve is connected with a working oil port through the direction and flow control device. When the direction and flow control device is in a standby state, the working oil port is communicated with an oil tank; when the direction and flow control device is in a working state, the oil outlet of the variable pump is communicated with the working oil port. The working oil port is communicated with a load sensing oil port of the variable pump through a feedback oil way which is further communicated with the pressure-compensated valve. Due to the fact that the function achieved by the combination of the direction and flow control device and the pressure-compensated valve is the same as the function achieved by a load-sensitive multi-way valve, all valve blocks are formed by combining ordinary hydraulic valves, operation is convenient, and the load-sensitive valve block is economical and practical, the universality of a load-sensitive system is improved.
Description
Technical field
The utility model relates to HYDRAULIC CONTROL SYSTEM technical field, relates in particular to a kind of load-sensitive valve piece.
Background technique
Nowadays along with social development, the mankind are more and more to the demand of the energy, and energy supply growing tension, so research and development, production and use energy-saving equipment have been very urgent., all there is energy loss in various degree in the common oil hydraulic circuit using at present, when hydraulic valve closes, oil hydraulic pump is in off-load, high pressure standby or high pressure overflow situation, thus the loss of build-up of pressure and energy, the noise that simultaneous is certain.In order to solve the problem of the energy loss of oil hydraulic circuit existence, load sensitive system is suggested.Load sensitive system is a kind ofly to experience system pressure and traffic demand, and the oil hydraulic circuit of required flow and pressure is only provided.
Present load sensitive system adopts load sensing multi-way valve and Variable plunger pump mostly, and still, the price comparison of load sensing multi-way valve is expensive, manufactures complicatedly, and difficulty of processing is large, and can not be mixed with common hydrovalve while using, and versatility is poor.
Therefore, how solving the poor problem of load sensitive system versatility, is the current technical issues that need to address of those skilled in the art.
Model utility content
In view of this, the utility model provides a kind of load-sensitive valve piece, for solving the poor problem of load sensitive system versatility.
In order to address the above problem, the utility model provides a kind of load-sensitive valve piece, comprising:
Pressure-compensated valve, described pressure-compensated valve is communicated with the oil outlet of variable displacement pump;
Directional flow control gear, described pressure-compensated valve is connected with actuator port by described directional flow control gear, when described directional flow control gear is during in holding state, described actuator port is communicated with fuel tank, when described directional flow control gear is in running order, the oil outlet of described variable displacement pump is communicated with described actuator port;
Described actuator port is communicated with the load-transducing hydraulic fluid port of described variable displacement pump by feedback oil circuit, and described feedback oil circuit is also communicated with described pressure-compensated valve.
Preferably, described directional flow control gear comprises selector valve and one-way throttle valve, and described selector valve is communicated with described actuator port by described one-way throttle valve, and described one-way throttle valve is along described selector valve to throttling in the direction of described actuator port.
Preferably, described actuator port comprises the first actuator port and the second actuator port, described selector valve is communicated with described the first actuator port by the first one-way throttle valve, described selector valve is communicated with described the second actuator port by the second one-way throttle valve, between described actuator port and described feedback oil circuit, be connected with shuttle valve, described the first actuator port is communicated with the first filler opening of described shuttle valve, described the second actuator port is communicated with the second filler opening of described shuttle valve, and the oil outlet of described shuttle valve is communicated with described feedback oil circuit.
Preferably, described directional flow control gear is provided with damping hole to the described feedback oil circuit of described pressure-compensated valve.
A kind of load-sensitive valve piece that the utility model scheme provides, comprises pressure-compensated valve, and described pressure-compensated valve is communicated with the oil outlet of variable displacement pump; Directional flow control gear, described pressure-compensated valve is connected with actuator port by described directional flow control gear, when described directional flow control gear is during in holding state, described actuator port is communicated with fuel tank, when described directional flow control gear is in running order, the oil outlet of described variable displacement pump is communicated with described actuator port; Described actuator port is communicated with the load-transducing hydraulic fluid port of described variable displacement pump by feedback oil circuit, and described feedback oil circuit is also communicated with described pressure-compensated valve.
So arrange, when directional flow control gear is during in holding state, this load-sensitive valve piece and the state of equilibrium of variable displacement pump in a kind of low pressure standby, when directional flow control gear is in running order, low-pressure hydraulic oil arrives actuator port by pressure-compensated valve and directional flow control gear successively, meanwhile, low-pressure hydraulic oil feeds back to the load-transducing hydraulic fluid port of pressure-compensated valve and variable displacement pump through feedback oil circuit.Now, the hydraulic oil that feeds back to variable displacement pump load-transducing hydraulic fluid port impels variable pump delivery to become large, and variable displacement pump starts to supply with pressure oil to load-sensitive valve piece, and final, variable pump delivery is consistent with the demand of load with pressure.The function that the directional flow control gear function that combination realizes with pressure-compensated valve providing due to this programme realizes with load sensing multi-way valve is identical, and the valve piece that this programme provides is all formed by common hydrovalve combination, easy to operate, economical and practical, so this programme has improved the versatility of load sensitive system.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The fundamental diagram of a kind of load-sensitive valve piece that Fig. 1 provides for the utility model specific embodiment scheme;
The surface structure schematic diagram of a kind of load-sensitive valve piece that Fig. 2 provides for the utility model specific embodiment scheme;
Fig. 3 is that the rear side of Fig. 2 is to view;
Fundamental diagram when a plurality of load-sensitive valve piece combinations that Fig. 4 provides for the utility model specific embodiment scheme superpose;
In Fig. 1 to Fig. 4:
Pressure-compensated valve 1, the first hydraulic fluid port 11, selector valve 2, one-way throttle valve 3, shuttle valve 4, the first actuator port 51, the second actuator port 52, feedback oil circuit 6, damping hole 61, load-transducing hydraulic fluid port 7, the second hydraulic fluid port 8, integrated valve block 9.
Embodiment
Core of the present utility model is to provide a kind of load-sensitive valve piece, for solving the poor problem of load sensitive system versatility.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1 to Fig. 3, the fundamental diagram of a kind of load-sensitive valve piece that Fig. 1 provides for the utility model specific embodiment scheme; The surface structure schematic diagram of a kind of load-sensitive valve piece that Fig. 2 provides for the utility model specific embodiment scheme; Fig. 3 is that the rear side of Fig. 2 is to view.
In a kind of specific embodiment, this programme provides a kind of load-sensitive valve piece, comprising:
Pressure-compensated valve 1, pressure-compensated valve 1 is communicated with the oil outlet of variable displacement pump;
Directional flow control gear, pressure-compensated valve 1 is connected with actuator port by directional flow control gear, and when directional flow control gear is during in holding state, actuator port is communicated with fuel tank, when directional flow control gear is in running order, the oil outlet of variable displacement pump is communicated with actuator port;
Actuator port is communicated with the load-transducing hydraulic fluid port 7 of variable displacement pump by feedback oil circuit 6, and feedback oil circuit 6 is also communicated with pressure-compensated valve 1.
Load-sensitive valve piece and load-reacting pump in this specific embodiment are used in conjunction with, and form a feedback loop.
Concrete, this load-sensitive valve piece comprises pressure-compensated valve 1, directional flow control gear, working oil path and feedback oil circuit 6, also comprises the integrated valve block 9 that each hydrovalve is integrated.Directional flow control gear has the function of commutation and throttling, be specifically as follows proportional reversing valve, or can being used in combination for selector valve 2 and one-way throttle valve 3, in order to reduce costs and to be convenient to, arrange, directional flow control gear is herein selected the combination of selector valve 2 and one-way throttle valve 3, and throttling in the direction of one-way throttle valve 3 along selector valve 2 to actuator port.The oil outlet of variable displacement pump is communicated with pressure-compensated valve 1 by the first hydraulic fluid port 11.Selector valve 2 is communicated with pressure-compensated valve 1, to control break-make and the flow direction of hydraulic oil.Selector valve 2 is communicated with actuator port by working oil path, the quantity of working oil path arranges according to the quantity of actuator port, in working oil path, be in series with one-way throttle valve 3, to control the flow of the hydraulic oil passing through, the hydraulic oil of process one-way throttle valve 3 directly flows to actuator port and arrives executive component.On the oil circuit between one-way throttle valve 3 and actuator port, draw a feedback oil circuit 6, actuator port is communicated with the load-transducing hydraulic fluid port 7 of variable displacement pump by feedback oil circuit 6, and feedback oil circuit 6 is also communicated with pressure-compensated valve 1, to detect the need state of load.
It should be noted that, according to the difference of executive component, the quantity of actuator port can be for one or more, and the present embodiment is introduced the working principle of this load sensitive system with two actuator ports.
Preferably, actuator port comprises the first actuator port 51 and the second actuator port 52, selector valve 2 connects two working oil path of leading to actuator port, and in each working oil path, be all in series with an one-way throttle valve 3, be that selector valve 2 is communicated with the first actuator port 51 by the first one-way throttle valve, selector valve 2 is communicated with the second actuator port 52 by the second one-way throttle valve.
Between actuator port and feedback oil circuit 6, be connected with shuttle valve 4, the first actuator port 51 is communicated with the first filler opening of shuttle valve 4, the second actuator port 52 is communicated with the second filler opening of shuttle valve 4, the oil outlet of shuttle valve 4 is communicated with feedback oil circuit 6, so arrange, no matter when the first actuator port 51 or the second actuator port 52 oil-feed, can make pressure feedback arrive the load-transducing hydraulic fluid port 7 of pressure-compensated valve 1 and variable displacement pump.
As shown in Figure 1, selector valve 2 has herein been selected solenoid directional control valve, when directional flow control gear is during in holding state, be that selector valve 2 is when meta, the path of variable displacement pump and actuator port is cut off, actuator port is communicated with fuel tank by the second hydraulic fluid port 8, this load-sensitive valve piece and the state of equilibrium of variable displacement pump in a kind of low pressure standby.When Ya electromagnet obtains electricly, selector valve 2 is in left when work position, and low-pressure hydraulic oil arrives 51 of the second actuator port 52, the first actuator ports by pressure-compensated valve 1, selector valve 2, one-way throttle valve 3 successively and is communicated with fuel tank by the second hydraulic fluid port 8.Simultaneously, low-pressure hydraulic oil feeds back to the load-transducing hydraulic fluid port 7 of pressure-compensated valve 1 and variable displacement pump through shuttle valve 4 and feedback oil circuit 6, now original balance is broken, the low-pressure hydraulic oil that feeds back to the load-transducing hydraulic fluid port 7 of variable displacement pump impels variable pump delivery to become large, and variable displacement pump starts to supply with pressure oil to load-sensitive valve piece.Pressure oil again arrives the load-transducing hydraulic fluid port 7 of the second actuator port 52, pressure-compensated valve 1 and variable displacement pump after said elements, now carries out feedback regulation again, until variable pump delivery and pressure are consistent with the demand of load, arrives another kind of balance.
When load changes again, this balance is broken again, proceeds feedback regulation, and working procedure and said process are afterwards similar, so locate to repeat no more.
In like manner, when Yb electromagnet obtains when electric, selector valve 2 is when the work of right position, and executive component moves in the opposite direction, finally reaches balance, and its working procedure and said process are similar, so locate to repeat no more.
Wherein, one-way throttle valve 3 is between selector valve 2 and actuator port, and the openings of sizes of one-way throttle valve 3, is determining to pass through the size of the flow of the first actuator port 51 and the second actuator port 52.The effect of pressure-compensated valve 1 is, the pressure size of load no matter, and the flow that all can guarantee to pass through the first actuator port 51 and the second actuator port 52 is consistent with the aperture of one-way throttle valve 3, and has nothing to do with induced pressure.
Above-mentioned selector valve 2 can also be servomotor driven change valve, electro-hydraulic reversing valve or hand-operated direction valve etc.
Preferably, directional flow control gear is provided with damping hole 61 to the feedback oil circuit 6 of pressure-compensated valve 1.So arrange, can reduce the percussion to pressure-compensated valve 1, guarantee system traveling comfort.
Visible, no matter whether system is in state of equilibrium, and the demand of executive component is consistent with the supply of variable displacement pump all the time, all less than too large energy loss, so, be the energy-conservation of a kind of real meaning.The directional flow control gear providing due to this programme is identical with the function of load sensing multi-way valve realization with the function of pressure-compensated valve combination realization, and the valve piece that this programme provides is all formed by common hydrovalve combination, not only meet the good operation of equipment, and easy to operate, economical and practical, so this programme has improved the versatility of load sensitive system.
The load-sensitive valve piece that this programme provides is all formed by common hydrovalve combination, manufactures simply, only needs an integrated valve block 9 of design processing, and easy to operate, and highly versatile is economical and practical.Not only avoided the high price of load sensing multi-way valve, and made up the problem of common oil hydraulic circuit energy loss, for manufacturing and designing of oil hydraulic circuit from now on provides a thinking.
Fundamental diagram when a plurality of load-sensitive valve piece combinations that as shown in Figure 4, Fig. 4 provides for the utility model specific embodiment scheme superpose.
In another kind of embodiment, on the basis in above-mentioned the first embodiment, this load-sensitive valve piece is combined to stack, can meet the action demand of a plurality of executive components.Wherein, a plurality of actuator ports share a feedback oil circuit 6 and feed back, and share the second hydraulic fluid port 8 and carry out off-load, share the first hydraulic fluid port 11 and carry out the supply of pressure oil.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a load-sensitive valve piece, is characterized in that, comprising:
Pressure-compensated valve (1), described pressure-compensated valve (1) is communicated with the oil outlet of variable displacement pump;
Directional flow control gear, described pressure-compensated valve (1) is connected with actuator port by described directional flow control gear, when described directional flow control gear is during in holding state, described actuator port is communicated with fuel tank, when described directional flow control gear is in running order, the oil outlet of described variable displacement pump is communicated with described actuator port;
Described actuator port is communicated with the load-transducing hydraulic fluid port (7) of described variable displacement pump by feedback oil circuit (6), and described feedback oil circuit (6) is also communicated with described pressure-compensated valve (1).
2. load-sensitive valve piece according to claim 1, it is characterized in that, described directional flow control gear comprises selector valve (2) and one-way throttle valve (3), described selector valve (2) is communicated with described actuator port by described one-way throttle valve (3), and described one-way throttle valve (3) is along extremely throttling in the direction of described actuator port of described selector valve (2).
3. load-sensitive valve piece according to claim 2, it is characterized in that, described actuator port comprises the first actuator port (51) and the second actuator port (52), described selector valve (2) is communicated with described the first actuator port (51) by the first one-way throttle valve, described selector valve (2) is communicated with described the second actuator port (52) by the second one-way throttle valve, between described actuator port and described feedback oil circuit (6), be connected with shuttle valve (4), described the first actuator port (51) is communicated with the first filler opening of described shuttle valve (4), described the second actuator port (52) is communicated with the second filler opening of described shuttle valve (4), the oil outlet of described shuttle valve (4) is communicated with described feedback oil circuit (6).
4. according to the load-sensitive valve piece described in claims 1 to 3 any one, it is characterized in that, described directional flow control gear is provided with damping hole (61) to the described feedback oil circuit (6) of described pressure-compensated valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320517703.2U CN203441851U (en) | 2013-08-22 | 2013-08-22 | Load-sensitive valve block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320517703.2U CN203441851U (en) | 2013-08-22 | 2013-08-22 | Load-sensitive valve block |
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| Publication Number | Publication Date |
|---|---|
| CN203441851U true CN203441851U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320517703.2U Expired - Fee Related CN203441851U (en) | 2013-08-22 | 2013-08-22 | Load-sensitive valve block |
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| CN (1) | CN203441851U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939407A (en) * | 2014-04-15 | 2014-07-23 | 徐州重型机械有限公司 | Multi-flow control valve, chassis supporting leg hydraulic control system and crane |
| CN104196798A (en) * | 2014-08-20 | 2014-12-10 | 徐州重型机械有限公司 | Reversing valve, load-sensitive multi-way valve and load-sensitive hydraulic system |
| CN105221506A (en) * | 2015-09-18 | 2016-01-06 | 徐州工业职业技术学院 | A kind of load-sensitive valve and load-sensitive hydraulic system |
| CN105443480A (en) * | 2014-08-12 | 2016-03-30 | 徐工集团工程机械股份有限公司 | Work valve body structure and proportional multi-way valve |
| CN108412829A (en) * | 2018-04-09 | 2018-08-17 | 徐州燕大传动与控制技术有限公司 | A kind of separately adjustable load-sensitive formula multi-way valve of inlet and outlet throttling side energy |
| CN112797046A (en) * | 2021-04-07 | 2021-05-14 | 湖南十开科技有限公司 | Load feedback control loop and load sensitive quantitative system |
| CN113107920A (en) * | 2021-04-07 | 2021-07-13 | 湖南十开科技有限公司 | Load sensitive variable system |
-
2013
- 2013-08-22 CN CN201320517703.2U patent/CN203441851U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939407A (en) * | 2014-04-15 | 2014-07-23 | 徐州重型机械有限公司 | Multi-flow control valve, chassis supporting leg hydraulic control system and crane |
| CN105443480A (en) * | 2014-08-12 | 2016-03-30 | 徐工集团工程机械股份有限公司 | Work valve body structure and proportional multi-way valve |
| DE102015215267B4 (en) | 2014-08-12 | 2024-02-01 | Xuzhou Construction Machinery Group Co., Ltd. | Functional connection valve body structure and proportional multi-way valve |
| CN104196798A (en) * | 2014-08-20 | 2014-12-10 | 徐州重型机械有限公司 | Reversing valve, load-sensitive multi-way valve and load-sensitive hydraulic system |
| CN105221506A (en) * | 2015-09-18 | 2016-01-06 | 徐州工业职业技术学院 | A kind of load-sensitive valve and load-sensitive hydraulic system |
| CN105221506B (en) * | 2015-09-18 | 2017-08-25 | 徐州工业职业技术学院 | A kind of load-sensitive valve and load-sensitive hydraulic system |
| CN108412829A (en) * | 2018-04-09 | 2018-08-17 | 徐州燕大传动与控制技术有限公司 | A kind of separately adjustable load-sensitive formula multi-way valve of inlet and outlet throttling side energy |
| CN108412829B (en) * | 2018-04-09 | 2022-02-11 | 徐州燕大传动与控制技术有限公司 | Load sensitive type multi-way valve with independently adjustable inlet and outlet throttling edges |
| CN112797046A (en) * | 2021-04-07 | 2021-05-14 | 湖南十开科技有限公司 | Load feedback control loop and load sensitive quantitative system |
| CN113107920A (en) * | 2021-04-07 | 2021-07-13 | 湖南十开科技有限公司 | Load sensitive variable system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA RAILWAY MANUFACTURING EQUIPMENT GROUP CO., L Free format text: FORMER NAME: CHINA RAILWAY TUNNELING EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 450016 No. sixth, 99 Avenue, Zhengzhou Economic Development Zone, Henan, China Patentee after: CHINA RAILWAY ENGINEERING EQUIPMENT GROUP Co.,Ltd. Address before: 450016 No. sixth, 99 Avenue, Zhengzhou Economic Development Zone, Henan, China Patentee before: CHINA RAILWAY TUNNELING EQUIPMENT Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |