CN103573731A - Flow control valve, flow control device and hydraulic oil heat dissipation system - Google Patents
Flow control valve, flow control device and hydraulic oil heat dissipation system Download PDFInfo
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- CN103573731A CN103573731A CN201210257682.5A CN201210257682A CN103573731A CN 103573731 A CN103573731 A CN 103573731A CN 201210257682 A CN201210257682 A CN 201210257682A CN 103573731 A CN103573731 A CN 103573731A
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Abstract
An embodiment of the invention discloses a flow control valve, a flow control device and a hydraulic oil heat dissipation system and relates to the technical field of engineering machinery. The flow control valve comprises a three-way pressure compensated valve, a first throttling valve and a second throttling valve; an oil inlet of the first throttling valve is in parallel connection with an oil inlet of the three-way pressure compensated valve; an oil outlet of the first throttling valve is in parallel connection with an oil inlet of the second throttling valve; an oil outlet of the second throttling valve is communicated with a flow feedback oil opening of the three-way pressure compensated valve. The flow control device and the hydraulic oil heat dissipation system comprise the flow control valve. The hydraulic oil heat dissipation system can improve heat dissipation efficiency of a hydraulic oil radiator.
Description
Technical field
The present invention relates to technical field of engineering machinery, be specifically related to a kind of flow control valve, a kind of flow control device and a kind of hydraulic oil cooling system that this flow control device is set that this flow control valve is set.
Background technique
At present, the hydraulic system of the big machinery such as hoist, dynamic compaction machinery is all used hydraulic oil radiator.The driving mode of hydraulic oil radiator has motor to drive and two kinds of forms of fluid motor-driven.
Motor-driven feature is to drive stabilization of speed, but needs main frame that stable electric current is provided, and main frame electrical system is had relatively high expectations.The advantage of fluid motor-driven is that driving torque is large, the hydraulic oil radiator with identical heat diffusion area by the heat radiation power of fluid motor-driven than large 25%～35% by motor-driven heat radiation power, but the rotating speed of oil hydraulic motor is vulnerable to the impact of engine speed.For example: a discharge capacity is 11cc/rev drive motor, the gear pump driven that is 16cc/rev by a discharge capacity, the power that hydraulic oil is loose is 55KW, and when engine speed drops to 1200r/min from 2000r/min, the heat radiation power of hydraulic oil radiator can drop to 32KW.
At least there is following technical problem in prior art:
Because the output flow of prior art middle gear pump is easily subject to the impact of engine speed, engine speed exists while changing and can cause oil hydraulic motor cannot obtain the hydraulic oil of constant flow rate, when hydraulic fluid flow rate that oil hydraulic motor obtains is non-constant, also cannot drive flabellum to rotate with constant desired speed, and then also cannot guarantee that hydraulic oil radiator is with higher heat radiation power stable operation, cause existing hydraulic oil radiator radiating efficiency poor.
Summary of the invention
The object of the invention is to propose a kind of flow control valve, a kind of flow control device and a kind of hydraulic oil cooling system that this flow control device is set that this flow control valve is set, solved prior art and had the poor technical problem of radiating efficiency.
For achieving the above object, the invention provides following technological scheme:
The flow control valve that the embodiment of the present invention provides, comprises three-way pressure compensating valve, first throttle valve and the second throttle valve, wherein:
The filler opening of described first throttle valve is in parallel with the filler opening of described three-way pressure compensating valve;
The oil outlet of described first throttle valve is in parallel with the filler opening of described the second throttle valve;
The oil outlet of described the second throttle valve is connected with the flow of described three-way pressure compensating valve feedback hydraulic fluid port.
Preferably, described first throttle valve is adjustable throttle valve.
Preferably, described the second throttle valve is fixation type throttle valve.
The flow control device that the embodiment of the present invention provides, comprises the flow control valve that the arbitrary technological scheme of relief valve, on-off control valve and the present invention provides, wherein:
The filler opening of described relief valve is in parallel with the filler opening of described on-off control valve;
Described on-off control valve comprises the first oil outlet and the second oil outlet, and described the first oil outlet is connected with the filler opening of described first throttle valve and the filler opening of described three-way pressure compensating valve in described flow control valve;
The return opening of described the second oil outlet, described relief valve and the return opening three of described three-way pressure compensating valve are in parallel;
Described in when described on-off control valve is driven valve, the filler opening of on-off control valve is connected with described the first oil outlet, when described on-off control valve is closed valve described in the filler opening of on-off control valve be connected with described the second oil outlet.
Preferably, this flow control device also comprises one-way valve, wherein:
The filler opening of described one-way valve is in parallel with the oil outlet of described first throttle valve;
The oil outlet of described one-way valve is in parallel with the return opening of described three-way pressure compensating valve.
Preferably, described on-off control valve is solenoid valve.
The hydraulic oil cooling system that the embodiment of the present invention provides, comprises the flow control device that the arbitrary technological scheme of oil supplying device, oil hydraulic motor, hydraulic oil radiator and the present invention provides, wherein:
The filler opening of described relief valve is all connected with the hydraulic oil output port of described oil supplying device with the parallel connection of the filler opening of described on-off control valve and both;
The oil outlet of described first throttle valve is connected with the hydraulic oil entrance of described oil hydraulic motor,
The pto＝power take-off of described oil hydraulic motor is connected with the flabellum of described hydraulic oil radiator and can drives described flabellum to rotate;
The hydraulic oil outlet of described oil hydraulic motor is connected with the filler opening of described core body, and the oil outlet of described core body is connected with hydraulic oil container;
The air-out direction of described flabellum towards or the core body of described hydraulic pressure radiator dorsad, and there is gap between described flabellum and described core body.
Preferably, described oil supplying device comprises power plant and oil pump, wherein:
The pto＝power take-off of described power plant is connected with the power input shaft of described oil pump and drives the power input shaft of described oil pump to rotate;
The hydraulic oil entrance of described oil pump is connected with described hydraulic oil container, and the hydraulic oil outlet of described oil pump is the hydraulic oil output port of described oil supplying device.
Preferably, described power plant are diesel engine, petrol engine or motor.
Preferably, described oil pump is quantitative gear pump.
Based on technique scheme, the embodiment of the present invention at least can produce following technique effect:
In flow control valve provided by the invention, when the pressure reduction of three-way pressure compensating valve (or claim: threeway recuperation valve, threeway compensator) is constant, by flow area and the constant flow of first throttle valve (being specifically as follows adjustable restrictive valve), the second throttle valve that regulates the second throttle valve (being specifically as follows adjustable restrictive valve) or different size is set can be exported different constant flows for oil hydraulic motor, and unnecessary flow directly flows back to hydraulic oil container from the return opening of three-way pressure compensating valve.Under the driving of constant flow and the second throttle valve oil outlet pressure, oil hydraulic motor can drive flabellum to rotate with constant desired speed, in the situation that assurance flabellum and oil hydraulic motor do not exceed the speed limit, make the heat radiation power of hydraulic oil radiator reach ideal value and keep constant, and then make the heat dissipation potential of hydraulic pressure radiator remain on the optimum state always, so solved prior art, there is the poor technical problem of radiating efficiency.
At least there is following advantage in many technological schemes provided by the invention:
1, the flabellum that the present invention both can guarantee hydraulic oil radiator is with the constant running of desirable tachometer value, can also offer the larger moment of torsion of flabellum of hydraulic oil radiator, so there is motor driven liquid force feed radiator flabellum and fluid motor-driven hydraulic oil radiator flabellum simultaneously.
2, the present invention is provided with solenoid valve, and whether the flabellum that can rationally control hydraulic oil radiator turns round.
3, the one-way valve, the relief valve that in flow control device of the present invention and hydraulic oil cooling system, are provided with protection use can guarantee the safe handling of element (for example oil pump).
4, the present invention can provide the hydraulic oil of constant flow rate to oil hydraulic motor, can make hydraulic oil radiator have maximum heat radiation power always, thereby eliminates the impact of engine speed on radiating effect.
6, the valve such as solenoid valve, relief valve level of integration is high, is convenient to install.
In sum, because flow control valve provided by the invention has merged the double dominant of motor driven liquid force feed radiator flabellum and fluid motor-driven hydraulic oil radiator flabellum, eliminated the impact of engine speed on hydraulic oil radiator radiating effect.The present invention relies on the mode of the hydraulic oil that oil hydraulic motor constant flow rate is provided, and has made up the defect of existing radiating mode, guarantees lasting, efficient, the safe operation of hydraulic system.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
The schematic diagram of annexation between each parts of the flow control valve that Fig. 1 provides for the embodiment of the present invention;
The schematic diagram of annexation between each parts of the flow control device that Fig. 2 provides for the embodiment of the present invention;
The schematic diagram of annexation between each parts of the hydraulic oil cooling system that Fig. 3 provides for the embodiment of the present invention.
Mark in figure: 1, three-way pressure compensating valve; 2, flow control device; 21, first throttle valve; 22, the second throttle valve; 3, relief valve; 4, on-off control valve; 5, one-way valve; 60, oil supplying device; 61, oil pump; 62, oil hydraulic motor; 7, hydraulic oil radiator; 71, flabellum; 72, core body; 8, hydraulic oil container.
Embodiment
Below by accompanying drawing Fig. 1～Fig. 3 and the mode of enumerating optional embodiments more of the present invention, technological scheme of the present invention (comprising optimal technical scheme) is described in further detail.It should be noted that: any technical characteristics in the present embodiment, any technological scheme is all the technical characteristics of plurality of optional or one or more in optional technological scheme, cannot exhaustive all alternative technical characteristicss of the present invention and alternative technological scheme in order to describe succinct need in presents, also the mode of execution that is not easy to each technical characteristics all emphasizes that it is one of optional numerous embodiments, so those skilled in the art should know: any technical characteristics and any technological scheme in the present embodiment all do not limit the scope of the invention, protection scope of the present invention should comprise that those skilled in the art do not pay the thinkable any alternate embodiments of creative work.
It is a kind of for exporting the flow control valve of the hydraulic oil of constant flow rate, a kind of flow control device and a kind of hydraulic oil cooling system that this flow control device is set that this flow control valve is set that the embodiment of the present invention provides.
Below in conjunction with the more detailed by way of example explanation technological scheme provided by the invention of accompanying drawing Fig. 1～Fig. 3.
As shown in FIG. 1 to 3, the flow control valve that the embodiment of the present invention provides, comprises in three-way pressure compensating valve 1, first throttle valve 21(figure for adjustable throttle valve) and the second throttle valve 22(figure in be fixation type throttle valve), wherein:
The filler opening of first throttle valve 21 (filler opening also claims P mouth conventionally) is in parallel with the filler opening of three-way pressure compensating valve 1.The parallel connection of oil circuit and circuit be parallel with certain similarity, but oil circuit transmission is liquid (being hydraulic oil in this example) but not electric current.
The oil outlet of first throttle valve 21 (oil outlet, return opening also can be called T mouth conventionally) is in parallel with the filler opening of the second throttle valve 22.
The oil outlet of the second throttle valve 22 is connected with the flow feedback hydraulic fluid port of three-way pressure compensating valve 1.
When three-way pressure compensating valve 1 works (now engine speed n >=800r/min in Fig. 3), the equilibrium equation formula of three-way pressure compensating valve 1 spool:
P1×A1-P2×A1=F
In above formula: P1 represents the pressure of the ingress hydraulic oil of three-way pressure compensating valve 1 and first throttle valve 21;
A1 represents three-way pressure compensating valve 1 spool control area;
P2 represents the pressure of first throttle valve 21 outlet port hydraulic oil;
△ P represents the pressure reduction of three-way pressure compensating valve 1, is also equal to the pressure reduction that first throttle valve 21 is adjustable restrictive valve.
Go out can be obtained fom the above equation:
The flow rule deriving according to Bernoulli's equation:
in this formula～represent of equal value.
From above formula, if △ P is constant, by being adjustable restrictive valve in first throttle valve 21(figure) the flow Q of flow area A2 constant, by regulating the mode of first throttle valve 21 can export the hydraulic oil of different constant flows, the hydraulic oil of unnecessary flow can directly flow back to hydraulic oil container 8 from three-way pressure compensating valve 1 return opening simultaneously.
Under the hydraulic oil of constant flow of exporting at first throttle valve 21 and the driving of first throttle valve 21 outlet port hydraulic fluid pressures, oil hydraulic motor 62 can drive flabellum 71 with constant desired speed operation, and guarantee that flabellum 71 and oil hydraulic motor 62 be not in the situation that exceeding the speed limit, make the heat radiation power of hydraulic oil radiator 7 reach ideal value (this ideal value can by testing or the mode such as calculating obtains) and keep maximum, make the heat dissipation potential of hydraulic oil radiator 7 remain on the optimum state always.
When three-way pressure compensating valve 1 is inoperative (now engine speed n < 800r/min in Fig. 3), whole flows of hydraulic oil cooling system are by first throttle valve 21, oil hydraulic motor 62 rotating speeds reduce, and the efficiency of hydraulic oil radiator 7 declines to some extent.But consider that the equipment that flow control valve provided by the invention, flow control device and hydraulic oil cooling system are set just has larger heating value when normal working, and equipment descends the rotating speed of motor generally higher than 800r/min in working order, so can ignore this impact.
As shown in FIG. 1 to 3, the flow control device 2 that the embodiment of the present invention provides, comprises the flow control valve as shown in Figure 1 that relief valve 3, on-off control valve 4 and the arbitrary technological scheme of the present invention provide, wherein:
The filler opening of relief valve 3 is in parallel with the filler opening of on-off control valve 4.
On-off control valve 4 comprises the first oil outlet and the second oil outlet, and when on-off control valve 4 is driven valve, the filler opening of on-off control valve 4 is connected with the first oil outlet, and when on-off control valve 4 is closed valve, the filler opening of on-off control valve 4 is connected with the second oil outlet.In this example, driving valve is the two states of on-off control valve 4 with closing valve, so drive valve, also can be called the first state, closes valve and can be called the second state.
The first oil outlet is connected with the filler opening of first throttle valve 21 and the filler opening of three-way pressure compensating valve 1 in flow control valve.
The return opening three of the return opening of the second oil outlet, relief valve 3 and three-way pressure compensating valve 1 is in parallel.
By regulating on-off control valve 4 to be out valve or closing three-way pressure compensating valve 1 and the first throttle valve 21 whether hydraulic oil that the mode of valve can control oil pump 61 outputs enters flow control valve.
In the present embodiment, this flow control device 2 also comprises one-way valve 5, wherein:
The filler opening of one-way valve 5 is in parallel with the oil outlet of first throttle valve 21.
The oil outlet of one-way valve 5 is in parallel with the return opening of three-way pressure compensating valve 1.
One-way valve 5 has repairing function, and in order to prevent that oil hydraulic motor 62 from stopping, time reversion is inhaled empty.When running up, oil hydraulic motor 62 is inhaled sky and be there will be internal high temperature sintering phenomenon, damages internal structure, causes in oil hydraulic motor 62 and lets out, and volumetric efficiency is low, when serious, can not work.
In the present embodiment, on-off control valve 4 is preferably solenoid valve.Solenoid valve has is convenient to control, a little highly sensitive.Certainly, use other valves to using to replace solenoid valve as the technological scheme of on-off control valve 4 also within protection scope of the present invention.
As shown in FIG. 1 to 3, the hydraulic oil cooling system that the embodiment of the present invention provides, comprises flow control device or flow control valve that oil supplying device 60, oil hydraulic motor 62, hydraulic oil radiator 7 and the arbitrary technological scheme of the present invention provide, wherein:
The filler opening of the filler opening of relief valve 3 and on-off control valve 4 in parallel and both be all connected with the hydraulic oil output port of oil supplying device 60.
The oil outlet of first throttle valve 21 is connected with the hydraulic oil entrance of oil hydraulic motor 62.
The pto＝power take-off of oil hydraulic motor 62 is connected with the flabellum 71 of hydraulic oil radiator 7 and can drives flabellum 71 to rotate.
The hydraulic oil outlet of oil hydraulic motor 62 is connected with the filler opening of core body 72, and the oil outlet of core body 72 is connected with hydraulic oil container 8.
The air-out direction of flabellum 71 towards or the core body 72 of hydraulic pressure radiator dorsad, and there is gap between flabellum 71 and core body 72.The air-out direction of flabellum 71 is when the core body 72 of hydraulic pressure radiator, thereby can make in the mode of blowing the air-flow that temperature is lower through the core body 72 of hydraulic pressure radiator, reach the object of the core body 72 interior hydraulic oil of cooling hydraulic pressure radiator, otherwise, the air-out direction of flabellum 71 is dorsad during the core body 72 of hydraulic pressure radiator, thereby can make in the mode of air draught the lower air-flow of temperature through the core body 72 of hydraulic pressure radiator, also can reach the object of the core body 72 interior hydraulic oil of cooling hydraulic pressure radiator.
The technological scheme that oil hydraulic motor 62 drives flabellums 71 to rotate to dispel the heat has advantages of that with respect to being rotated by driven by motor flabellum 71 for dispelling the heat moment of torsion is large, has heat radiation power that the hydraulic oil radiator 7 of identical heat diffusion area drives by oil hydraulic motor 62 than by motor-driven heat radiation power large 25%～35%.
In the present embodiment, oil supplying device 60 comprises that power plant (being specifically as follows diesel engine, petrol engine or motor) and oil pump 61(are specifically as follows quantitative gear pump), wherein:
The pto＝power take-off of power plant is connected with the power input shaft of oil pump 61 and drives the power input shaft of oil pump 61 to rotate.
The hydraulic oil entrance of oil pump 61 is connected with hydraulic oil container 8, and the hydraulic oil outlet of oil pump 61 is the hydraulic oil output port of oil supplying device 60.
Power plant for oil pump 61 provide be enough to from hydraulic oil container 8 inhalant liquid force feeds and by hydraulic oil with certain pressure the power from hydraulic oil output port output.
Certainly, use other pumps with the technological scheme that replaces quantitative gear pump also within protection scope of the present invention.
The present embodiment medium power device can be diesel engine, petrol engine or motor, is preferably employing diesel engine.Diesel engine has advantages of that power is large, economic performance good.
Certainly, use other power plant with the technological scheme that replaces motor or motor also within protection scope of the present invention.
In addition, the present invention also can adopt the mode of Variable plunger pump driving fixed displacement motor, adjusts the size of variable piston pump delivery, to realize the rotating speed of drive motor stable output according to the rotating speed of motor.But this control mode need to be carried out controlled variable plunger pump according to the rotating speed of motor, need adoption rate to control.In this scheme, the rotation speed change of motor is by the manipulation handling of main frame out, adopt and while controlling in real time, to need the rotating speed that system can monitoring engine, then according to engine speed, carry out the displacement variation of control pump, function relation between them is nonlinear, and this just needs host computer system is automatical control system.
The disclosed arbitrary technological scheme of the invention described above unless otherwise stated, disclosed number range is preferred number range, any it should be appreciated by those skilled in the art: preferred number range is only the obvious or representative numerical value of technique effect in many enforceable numerical value.Because numerical value is more, cannot be exhaustive, so the present invention just discloses part numerical value to illustrate technological scheme of the present invention, and the above-mentioned numerical value of enumerating should not form the restriction to the invention protection domain.
Simultaneously, the invention described above disclosed or the interconnected component or the structural member that relate to, unless otherwise stated, connect and all can be understood as: can dismantle and be fixedly connected with (for example using bolt or screw to connect), also can be understood as: non-removable being fixedly connected with (for example rivet, weld), certainly, be connected to each other also and can for example, by integral type structure (use casting technique is integrally formed to be created), be replaced (obviously cannot adopt except integrally formed technique).
In addition, in the disclosed arbitrary technological scheme of the invention described above applied for the term that represents geometry site or geometrical shape unless otherwise stated its implication comprise and its approximate, similar or approaching state or shape.
Finally should be noted that: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characteristics is equal to replacement the specific embodiment of the present invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technological scheme scope that the present invention asks for protection.
Claims (10)
1. a flow control valve, is characterized in that, comprises three-way pressure compensating valve, first throttle valve and the second throttle valve, wherein:
The filler opening of described first throttle valve is in parallel with the filler opening of described three-way pressure compensating valve;
The oil outlet of described first throttle valve is in parallel with the filler opening of described the second throttle valve;
The oil outlet of described the second throttle valve is connected with the flow of described three-way pressure compensating valve feedback hydraulic fluid port.
2. flow control valve according to claim 1, is characterized in that, described first throttle valve is adjustable throttle valve.
3. flow control valve according to claim 1, is characterized in that, described the second throttle valve is fixation type throttle valve.
4. a flow control device, is characterized in that, comprises the arbitrary described flow control valve of relief valve, on-off control valve and claim 1-3, wherein:
The filler opening of described relief valve is in parallel with the filler opening of described on-off control valve;
Described on-off control valve comprises the first oil outlet and the second oil outlet, and described the first oil outlet is connected with the filler opening of described first throttle valve and the filler opening of described three-way pressure compensating valve in described flow control valve;
The return opening of described the second oil outlet, described relief valve and the return opening three of described three-way pressure compensating valve are in parallel;
Described in when described on-off control valve is driven valve, the filler opening of on-off control valve is connected with described the first oil outlet, when described on-off control valve is closed valve described in the filler opening of on-off control valve be connected with described the second oil outlet.
5. flow control device according to claim 4, is characterized in that, this flow control device also comprises one-way valve, wherein:
The filler opening of described one-way valve is in parallel with the oil outlet of described first throttle valve;
The oil outlet of described one-way valve is in parallel with the return opening of described three-way pressure compensating valve.
6. according to the flow control device described in claim 4 or 5, it is characterized in that, described on-off control valve is solenoid valve.
7. a hydraulic oil cooling system, is characterized in that, comprises the arbitrary described flow control device of oil supplying device, oil hydraulic motor, hydraulic oil radiator and claim 4-6, wherein:
The filler opening of described relief valve is all connected with the hydraulic oil output port of described oil supplying device with the parallel connection of the filler opening of described on-off control valve and both;
The oil outlet of described first throttle valve is connected with the hydraulic oil entrance of described oil hydraulic motor,
The pto＝power take-off of described oil hydraulic motor is connected with the flabellum of described hydraulic oil radiator and can drives described flabellum to rotate;
The hydraulic oil outlet of described oil hydraulic motor is connected with the filler opening of described core body, and the oil outlet of described core body is connected with hydraulic oil container;
The air-out direction of described flabellum towards or the core body of described hydraulic pressure radiator dorsad, and there is gap between described flabellum and described core body.
8. hydraulic oil cooling system according to claim 7, is characterized in that, described oil supplying device comprises power plant and oil pump, wherein:
The pto＝power take-off of described power plant is connected with the power input shaft of described oil pump and drives the power input shaft of described oil pump to rotate;
The hydraulic oil entrance of described oil pump is connected with described hydraulic oil container, and the hydraulic oil outlet of described oil pump is the hydraulic oil output port of described oil supplying device.
9. hydraulic oil cooling system according to claim 8, is characterized in that, described power plant are diesel engine, petrol engine or motor.
10. hydraulic oil cooling system according to claim 8, is characterized in that, described oil pump is quantitative gear pump.
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| CN201210257682.5A CN103573731B (en) | 2012-07-24 | 2012-07-24 | Flow control device and hydraulic oil cooling system |
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| CN201210257682.5A CN103573731B (en) | 2012-07-24 | 2012-07-24 | Flow control device and hydraulic oil cooling system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104110412A (en) * | 2013-04-18 | 2014-10-22 | 罗伯特·博世有限公司 | Flow Regulating Valve Assembly |
| CN105840572A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Reversing link for load-sensitive multi-way valve, load-sensitive multi-way valve and engineering machinery hydraulic system |
| CN109340218A (en) * | 2018-12-18 | 2019-02-15 | 中国铁建重工集团有限公司 | A kind of cooling control system and cutting apparatus of diaphram wall cutting apparatus |
| CN114396416A (en) * | 2022-01-07 | 2022-04-26 | 燕山大学 | Parameter sensitivity analysis method for pressure compensation system behind valve |
| WO2022199609A1 (en) * | 2021-03-23 | 2022-09-29 | 中联重科股份有限公司 | Flow distribution control method, device, and apparatus for hydraulic system and hydraulic system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110412A (en) * | 2013-04-18 | 2014-10-22 | 罗伯特·博世有限公司 | Flow Regulating Valve Assembly |
| CN105840572A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Reversing link for load-sensitive multi-way valve, load-sensitive multi-way valve and engineering machinery hydraulic system |
| CN109340218A (en) * | 2018-12-18 | 2019-02-15 | 中国铁建重工集团有限公司 | A kind of cooling control system and cutting apparatus of diaphram wall cutting apparatus |
| CN109340218B (en) * | 2018-12-18 | 2020-06-12 | 中国铁建重工集团股份有限公司 | Cooling control system of underground continuous wall cutting equipment and cutting equipment |
| WO2022199609A1 (en) * | 2021-03-23 | 2022-09-29 | 中联重科股份有限公司 | Flow distribution control method, device, and apparatus for hydraulic system and hydraulic system |
| CN114396416A (en) * | 2022-01-07 | 2022-04-26 | 燕山大学 | Parameter sensitivity analysis method for pressure compensation system behind valve |
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| Publication number | Publication date |
|---|---|
| CN103573731B (en) | 2015-12-16 |
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