CN103573731B - Flow control device and hydraulic oil cooling system - Google Patents
Flow control device and hydraulic oil cooling system Download PDFInfo
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- CN103573731B CN103573731B CN201210257682.5A CN201210257682A CN103573731B CN 103573731 B CN103573731 B CN 103573731B CN 201210257682 A CN201210257682 A CN 201210257682A CN 103573731 B CN103573731 B CN 103573731B
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Abstract
The embodiment of the invention discloses a kind of flow control valve, flow control device and hydraulic oil cooling system, relate to technical field of engineering machinery.This flow control valve, comprise three-way pressure compensating valve, first throttle valve and second throttle, the filler opening of first throttle valve is in parallel with the filler opening of three-way pressure compensating valve; The oil outlet of first throttle valve is in parallel with the filler opening of second throttle; The oil outlet of second throttle is connected with the flow feedback hydraulic fluid port of three-way pressure compensating valve.This flow control device and this hydraulic oil cooling system include flow control valve provided by the invention.The present invention can improve the radiating efficiency of 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 the flow control device of this flow control valve and a kind of hydraulic oil cooling system arranging this flow control device are set.
Background technique
At present, the hydraulic system of the big machinery such as hoist, dynamic compaction machinery all uses hydraulic oil radiator.The driving mode of hydraulic oil radiator has motor to drive and fluid motor-driven two kinds of forms.
Motor-driven feature drives stabilization of speed, but need the electric current that main frame provides stable, requires higher to main frame electrical system.The advantage of fluid motor-driven is that driving torque is large, the hydraulic oil radiator with identical heat diffusion area is compared by motor-driven heat radiation power large 25% ~ 35% by the heat radiation power of fluid motor-driven, but the rotating speed of oil hydraulic motor is vulnerable to the impact of engine speed.Such as: a discharge capacity is 11cc/rev drive motor, be the gear pump driven of 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:
Output flow due to prior art middle gear pump is easily subject to the impact of engine speed, engine speed can cause oil hydraulic motor cannot obtain the hydraulic oil of constant flow rate when there is change, also flabellum cannot be driven when the hydraulic fluid flow rate that oil hydraulic motor obtains is non-constant to rotate with constant desired speed, and then also cannot ensure 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 the flow control device of this flow control valve and a kind of hydraulic oil cooling system arranging this flow control device are set, solve prior art and there is 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 second throttle, 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 second throttle;
The oil outlet of described second throttle is connected with the flow feedback hydraulic fluid port of described three-way pressure compensating valve.
Preferably, described first throttle valve is adjustable throttle valve.
Preferably, described second throttle 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 first oil outlet is connected with the filler opening of described first throttle valve in described flow control valve and the filler opening of described three-way pressure compensating valve;
The return opening of described second oil outlet, described relief valve and the return opening three parallel connection of described three-way pressure compensating valve;
During described on-off control valve valve opening, the filler opening of described on-off control valve is connected with described first oil outlet, and during described on-off control valve pass valve, the filler opening of described on-off control valve is connected with described 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 in parallel with the filler opening of described on-off control valve and both be all connected with the hydraulic oil output port of described oil supplying device;
The oil outlet of described first throttle valve is connected with the hydraulic oil inlet 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 described flabellum can be driven to rotate;
The hydraulic oil outlet of described oil hydraulic motor is connected with the filler opening of the core body of described hydraulic oil radiator, and the oil outlet of described core body is connected with hydraulic oil container;
The air-out direction of described flabellum towards or described core body 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 inlet 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:
Due 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), regulate second throttle (being specifically as follows adjustable restrictive valve) or second throttle that different size is set can export different constant flows for oil hydraulic motor, and unnecessary flow directly flow back to hydraulic oil container from the return opening of three-way pressure compensating valve.Under the driving of constant flow and second throttle oil outlet pressure, oil hydraulic motor can drive flabellum to rotate with constant desired speed, when ensureing that 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, so solve prior art to there is the poor technical problem of radiating efficiency always.
At least there is following advantage in many technological schemes provided by the invention:
1, the present invention both can ensure that the flabellum of hydraulic oil radiator was with the constant running of desirable tachometer value, the moment of torsion that the flabellum of hydraulic oil radiator is larger can also be supplied to, so have the advantage of motor driven liquid force feed radiator flabellum and fluid motor-driven hydraulic oil radiator flabellum simultaneously.
Whether 2, the present invention is provided with solenoid valve, can the flabellum of conservative control hydraulic oil radiator operate.
3, be provided with the one-way valve of protection in inventive flow control gear and hydraulic oil cooling system, safe handling that relief valve can ensure element (such as oil pump).
4, the present invention can provide the hydraulic oil of constant flow rate to oil hydraulic motor, and hydraulic oil radiator can be made to have maximum heat radiation power always, thus eliminates engine speed to the impact of 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, the impact of engine speed on hydraulic oil radiator radiating effect is eliminated.The present invention relies on the mode of the hydraulic oil of oil hydraulic motor constant flow rate of providing, and compensate for the defect of existing radiating mode, ensure that hydraulic system continues, efficiently, the operation of safety.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, 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, second throttle; 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 enumerating embodiment 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 one or more in the technical characteristics of plurality of optional or optional technological scheme, cannot exhaustive all alternative technical characteristicss of the present invention and alternative technological scheme in order to describe succinct to need in presents, also the mode of execution being 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 in the present embodiment and any technological scheme all do not limit the scope of the invention, protection scope of the present invention should comprise those skilled in the art and not pay the thinkable any alternate embodiments of creative work.
Embodiments provide a kind of flow control valve of the hydraulic oil for exporting constant flow rate, a kind of the flow control device of this flow control valve and a kind of hydraulic oil cooling system arranging this flow control device are set.
Below in conjunction with accompanying drawing Fig. 1 ~ Fig. 3 explanation technological scheme provided by the invention specifically by way of example.
As shown in FIG. 1 to 3, the flow control valve that the embodiment of the present invention provides, comprise three-way pressure compensating valve 1, first throttle valve 21 (being adjustable throttle valve in figure) and second throttle 22 (being fixation type throttle valve in figure), wherein:
The filler opening (filler opening also claims P mouth usually) of first throttle valve 21 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 be liquid (being hydraulic oil in this example) but not electric current.
The oil outlet (oil outlet, return opening also can be called T mouth usually) of first throttle valve 21 is in parallel with the filler opening of second throttle 22.
The oil outlet of second throttle 22 is connected with the flow feedback hydraulic fluid port of three-way pressure compensating valve 1.
First throttle valve 21 is in order to regulate the size of the hydraulic fluid flow rate of constant output.Second throttle 22 is with thinking that three-way pressure compensating valve 1 provides the hydraulic fluid flow rate of feedback.
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, also the equivalent first throttle valve 21 i.e. pressure reduction of adjustable restrictive valve.
Go out can be obtained fom the above equation:
Flow rule according to Bernoulli's equation is derived:
in this formula ~ represent of equal value.
From above formula, if △ P is constant, constant by the flow Q of the flow area A2 of first throttle valve 21 (being adjustable restrictive valve in figure), by the hydraulic oil regulating the mode of first throttle valve 21 can export different constant flow, the hydraulic oil of excess traffic directly can flow back to hydraulic oil container 8 from three-way pressure compensating valve 1 return opening simultaneously.
Under the hydraulic oil of constant flow and the driving of first throttle valve 21 outlet port hydraulic fluid pressure of first throttle valve 21 output, oil hydraulic motor 62 can drive flabellum 71 to run with constant desired speed, and ensure that flabellum 71 and oil hydraulic motor 62 be not when exceeding the speed limit, make the heat radiation power of hydraulic oil radiator 7 reach ideal value (this ideal value can by test 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 speed reduces, and the efficiency of hydraulic oil radiator 7 declines to some extent.But consider that the equipment arranging flow control valve provided by the invention, flow control device and hydraulic oil cooling system 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 this impact can be ignored.
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 during on-off control valve 4 valve opening, the filler opening of on-off control valve 4 is connected with the first oil outlet, and when on-off control valve 4 closes valve, the filler opening of on-off control valve 4 is connected with the second oil outlet.In this example, valve opening and pass valve are the two states of on-off control valve 4, so valve opening also can be called the first state, close valve and can be called the second state.
First oil outlet is connected with the filler opening of the first throttle valve 21 in flow control valve and the filler opening of three-way pressure compensating valve 1.
The return opening of the second oil outlet, relief valve 3 and the return opening three parallel connection of three-way pressure compensating valve 1.
Relief valve 3, in order to set the pressure maximum of oil pump 61 (in this example, oil pump 61 is metering pump), protects oil pump 61.
Whether valve opening or the mode of closing valve can enter three-way pressure compensating valve 1 and the first throttle valve 21 of flow control valve by the hydraulic oil that exports of control oil pump 61 by regulating on-off control valve 4.
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 when stopping in order to preventing oil hydraulic motor 62, reversion is inhaled empty.When running up, oil hydraulic motor 62 is inhaled sky and be there will be internal high temperature sintering phenomenon, and damage internal structure, cause in oil hydraulic motor 62 and let out, volumetric efficiency is low, can not work time serious.
In the present embodiment, on-off control valve 4 is preferably solenoid valve.Solenoid valve have be convenient to control, a little highly sensitive.Certainly, use other valves to replace the technological scheme of solenoid valve as 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 relief valve 3 in parallel with the filler opening of on-off control valve 4 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 inlet 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 flabellum 71 can be driven to rotate.
The hydraulic oil outlet of oil hydraulic motor 62 is connected with the filler opening of the core body 72 of hydraulic pressure radiator 7, and the oil outlet of core body 72 is connected with hydraulic oil container 8.
The air-out direction of flabellum 71 towards or core body 72 dorsad, and there is gap between flabellum 71 and core body 72.When the air-out direction of flabellum 71 is towards the core body 72 of hydraulic pressure radiator, can with the object of the mode air-flow that make temperature lower of blowing hydraulic oil through the core body 72 of hydraulic pressure radiator thus in the core body 72 reaching cooling hydraulic pressure radiator, otherwise, during the core body 72 of the air-out direction of flabellum 71 hydraulic pressure radiator dorsad, can make the object of air-flow lower for temperature hydraulic oil through the core body 72 of hydraulic pressure radiator thus in the core body 72 that also can reach cooling hydraulic pressure radiator in the mode of air draught.
The technological scheme that oil hydraulic motor 62 drives flabellum 71 to rotate and dispels the heat has the large advantage of moment of torsion for being rotated by driven by motor flabellum 71 and dispelling the heat, and the heat radiation power ratio that the hydraulic oil radiator 7 with identical heat diffusion area is driven by oil hydraulic motor 62 is by motor-driven heat radiation power large 25% ~ 35%.
In the present embodiment, oil supplying device 60 comprises power plant (being specifically as follows diesel engine, petrol engine or motor) and oil pump 61 (being 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 inlet 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 are enough to from hydraulic oil container 8 inhalant liquid force feed and the power exported from hydraulic oil output port with certain pressure by hydraulic oil for oil pump 61 provides.
Certainly, use other pumps to replace the technological scheme of 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, preferably adopts diesel engine.Diesel engine has the advantage that power is large, economic performance is good.
Certainly, use other power plant to replace the technological scheme of motor or motor also within protection scope of the present invention.
In addition, the present invention also can adopt Variable plunger pump to drive the mode of 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 needs to carry out controlled variable plunger pump according to the rotating speed of motor, needs adoption rate to control.In the program, the rotation speed change of motor is by the manipulation handling of main frame out, adopting to need system can the rotating speed of monitoring engine when controlling in real time, then the displacement variation of control pump is carried out according to engine speed, function relation between them is nonlinear, and this just needs host computer system to be automatical control system.
Arbitrary technological scheme disclosed in the invention described above unless otherwise stated, disclosed number range is preferred number range, anyly it should be appreciated by those skilled in the art: preferred number range is only the numerical value that in many enforceable numerical value, technique effect is obvious or representative.Because numerical value is more, cannot be exhaustive, so the present invention just discloses component values to illustrate technological scheme of the present invention, and the above-mentioned numerical value enumerated should not form the restriction to the invention protection domain.
Simultaneously, disclosed in the invention described above or the component be connected to each other related to or structural member, unless otherwise stated, connect and all can be understood as: can releasably be fixedly connected with (such as using bolt or screw to connect), also can be understood as: to be non-removablely fixedly connected with (such as rivet, weld), certainly, be connected to each other and also can be replaced by integral type structure (such as use casting technique is integrally formed create) (obviously cannot adopt except integrally formed technique).
In addition, apply in arbitrary technological scheme disclosed in the invention described above for represent geometry site or geometrical shape term unless otherwise stated its implication comprise approximate with it, similar or close 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 with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; 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 of request of the present invention protection.
Claims (9)
1. a flow control device, is characterized in that, comprises relief valve, on-off control valve and flow control valve, and described flow control valve comprises three-way pressure compensating valve, first throttle valve and second throttle, 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 second throttle;
The oil outlet of described second throttle is connected with the flow feedback hydraulic fluid port of described three-way pressure compensating valve;
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 first oil outlet is connected with the filler opening of described first throttle valve in described flow control valve and the filler opening of described three-way pressure compensating valve;
The return opening of described second oil outlet, described relief valve and the return opening three parallel connection of described three-way pressure compensating valve;
During described on-off control valve valve opening, the filler opening of described on-off control valve is connected with described first oil outlet, and during described on-off control valve pass valve, the filler opening of described on-off control valve is connected with described second oil outlet.
2. flow control device according to claim 1, is characterized in that, described first throttle valve is adjustable throttle valve.
3. flow control device according to claim 1, is characterized in that, described second throttle is fixation type throttle valve.
4. flow control device according to claim 1, 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.
5. the flow control device according to claim 1 or 4, is characterized in that, described on-off control valve is solenoid valve.
6. 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 1-5, wherein:
The filler opening of described relief valve in parallel with the filler opening of described on-off control valve and both be all connected with the hydraulic oil output port of described oil supplying device;
The oil outlet of described first throttle valve is connected with the hydraulic oil inlet 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 described flabellum can be driven to rotate;
The hydraulic oil outlet of described oil hydraulic motor is connected with the filler opening of the core body of described hydraulic oil radiator, and the oil outlet of described core body is connected with hydraulic oil container;
The air-out direction of described flabellum towards or described core body dorsad, and there is gap between described flabellum and described core body.
7. hydraulic oil cooling system according to claim 6, 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 inlet 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.
8. hydraulic oil cooling system according to claim 7, is characterized in that, described power plant are diesel engine, petrol engine or motor.
9. hydraulic oil cooling system according to claim 7, 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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| CN103573731B true CN103573731B (en) | 2015-12-16 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102013206977A1 (en) * | 2013-04-18 | 2014-11-06 | Robert Bosch Gmbh | Flow control valve assembly |
| CN105840572B (en) * | 2015-01-16 | 2018-04-06 | 徐工集团工程机械股份有限公司 | Load sensing multi-way valve commutation connection, load sensing multi-way valve and construction machinery hydraulic system |
| 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 |
| CN113027847B (en) * | 2021-03-23 | 2022-04-26 | 中联重科股份有限公司 | Flow distribution control method, equipment and device of hydraulic system and hydraulic system |
| CN114396416B (en) * | 2022-01-07 | 2022-10-25 | 燕山大学 | Parameter sensitivity analysis method for pressure compensation system behind valve |
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