CN112065788A - Method for solving false operation of valve core of oil replacement valve under low-load working condition of closed hydraulic system - Google Patents
Method for solving false operation of valve core of oil replacement valve under low-load working condition of closed hydraulic system Download PDFInfo
- Publication number
- CN112065788A CN112065788A CN202010952326.XA CN202010952326A CN112065788A CN 112065788 A CN112065788 A CN 112065788A CN 202010952326 A CN202010952326 A CN 202010952326A CN 112065788 A CN112065788 A CN 112065788A
- Authority
- CN
- China
- Prior art keywords
- oil
- valve
- way
- circuit
- hydraulic system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/25—Pressure control functions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8613—Control during or prevention of abnormal conditions the abnormal condition being oscillations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a method for solving the misoperation of a valve core of an oil replacement valve under a low-load working condition of a closed hydraulic system, and belongs to the technical field of hydraulic systems. The hydraulic pump of the closed hydraulic system is communicated with the hydraulic actuator through the oil circuit A and the oil circuit B, the oil circuit A and the oil circuit B are connected with the oil valve through the oil pipe, the flowing resistance of oil in the oil circuit A and/or the oil circuit B is increased, the pressure difference between the oil circuit A and the oil circuit B on two sides of the oil valve is increased, the hydraulic pressure acting on the valve core of the oil valve is larger than the spring force of the spring acting on the valve core, the valve core of the oil valve can be ensured to act as required, the problems that the pressure fluctuation and the oil temperature of the closed hydraulic system are uncontrollable under the low-load working condition are solved, and the continuous and stable operation of the closed hydraulic system.
Description
Technical Field
The invention belongs to the technical field of hydraulic systems, and particularly relates to a method for solving the misoperation of a valve core of an oil replacement valve under a low-load working condition of a closed hydraulic system.
Background
The closed hydraulic system has the characteristics of compact structure, high integration degree, small reversing impact and stable operation, and is widely applied to occasions with requirements on sites and severe working conditions, such as industries of chemical industry, steel, engineering vehicles, ships and the like. The oil outlet and the oil inlet of a hydraulic pump in the closed hydraulic system are respectively and directly connected with the oil inlet and the oil return port of the hydraulic motor and are not communicated with the outside, oil liquid in the system is self-circulated, the contact probability with air is low, pollutants and water vapor are not easy to be mixed, and the oil tank can be designed to be small.
As shown in fig. 1, a general closed hydraulic system includes a prime mover, a main hydraulic pump, a variable control mechanism, an oil compensating pump, an oil compensating valve, a pressure gauge, etc., under a low-load condition, when a pressure difference Δ P between two working oil lines of the main hydraulic pump is less than or equal to 1MPa, a hydraulic pressure of the Δ P acting on a spool of the oil compensating valve is insufficient to completely overcome a spring force of a spring acting on the spool, so that the spool generates a malfunction, which includes that the spool cannot be maintained at a left position or a right position, or the spool is in a middle position and does not act, or the spool acts unreliably, or the spool acts uncontrollably, so that pressure fluctuation and oil temperature of the system are uncontrollable, and continuous and stable operation is affected.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to solve the problem that in the prior art, the closed hydraulic system has malfunction of an oil replacement valve core under a low-load working condition, so that system pressure fluctuation and oil temperature are uncontrollable, and continuous and stable operation is affected.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
according to the method for solving the misoperation of the valve element of the oil changing valve under the low-load working condition of the closed hydraulic system, a hydraulic pump of the closed hydraulic system is communicated with a hydraulic actuator through an oil way A and an oil way B, the oil way A and the oil way B are connected with the oil changing valve through oil pipes, the flowing resistance of oil in the oil way A and/or the oil way B is increased, and the pressure difference between the oil way A and the oil way B on two sides of the oil changing valve is increased.
Preferably, the manner of increasing the resistance to oil flow in the oil passage a and/or the oil passage B is: and a throttle valve and/or a one-way sequence valve are/is arranged on the oil path A and/or the oil path B.
Preferably, when the oil flows from the oil passage A to the oil passage B, the resistance of the oil flow in the oil passage A is increased; and/or when the oil flows from the oil passage B to the oil passage A, the resistance of the oil flow in the oil passage B is increased.
Preferably, the used closed hydraulic system comprises a hydraulic pump, a hydraulic actuator and an oil tank, wherein one end of the hydraulic pump is communicated with one end of the hydraulic actuator through an oil path A, and one end of the hydraulic pump is communicated with one end of the hydraulic actuator through an oil path B; the oil circuit A and the oil circuit B are respectively connected with an oil tank through oil supplementing circuits, and oil supplementing pumps are arranged on the oil supplementing circuits; an oil outlet valve is connected between the oil path A and the oil path B through an oil pipe and communicated to an oil tank; and a throttle valve and/or a one-way sequence valve are/is arranged on the oil path A and/or the oil path B.
Preferably, when oil flows from the oil passage A to the oil passage B, a throttle valve and/or a one-way sequence valve are arranged on the oil passage A; and/or oil flows from the oil passage B to the oil passage A, and a throttle valve and/or a one-way sequence valve are arranged on the oil passage B.
Preferably, the throttle valve is a hydraulic throttle valve; and/or the one-way throttle valve is a one-way hydraulic throttle valve.
Preferably, the throttle valve and/or one-way sequence valve are mounted by a pipeline or plate type.
Preferably, an oil supplementing valve of an oil way A and an oil supplementing valve of an oil way B are arranged on the oil supplementing circuit, and an oil supplementing circuit between the oil supplementing valve of the oil way A and the oil supplementing valve of the oil way B is communicated with the oil tank through an oil supplementing pump; the oil-supplementing valve of the oil circuit A and the oil-supplementing valve of the oil circuit B are two check valves which are connected in series in a reverse direction.
Preferably, the oil drain valve is connected to the oil tank via an oil drain pressure valve.
Preferably, a pressure gauge and/or a pressure transmitter and/or a pressure switch are/is arranged on the oil circuit A and/or the oil circuit B and/or the oil supplementing circuit.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
the invention relates to a method for solving the misoperation of a valve core of an oil changing valve under the low-load working condition of a closed hydraulic system, wherein a hydraulic pump of the closed hydraulic system is communicated with a hydraulic actuator through an oil circuit A and an oil circuit B, the oil circuit A and the oil circuit B are connected with the oil changing valve through oil pipes, the resistance of oil flowing in the oil circuit A and/or the oil circuit B is increased, the pressure difference between the oil circuit A and the oil circuit B on two sides of the oil changing valve is increased, the hydraulic pressure acting on the valve core of the oil changing valve is larger than the spring force acting on the valve core by a spring, so that the valve core of the oil changing valve can act as required, the problem that the pressure fluctuation and the oil temperature of the closed hydraulic system under the low-load working condition.
Drawings
Fig. 1 is a schematic structural diagram of a closed hydraulic system in general in the prior art;
FIG. 2 is a schematic structural diagram of a closed hydraulic system used in the method of the present invention, in which throttle valves are arranged on both oil paths A, B;
FIG. 3 is a partial schematic view of a closed hydraulic system with one-way throttle valves arranged in both oil paths A, B for the method of the present invention;
fig. 4 is a partial schematic view of a closed hydraulic system used in the method of the present invention, in which check sequence valves are arranged in both oil passages A, B.
The reference numerals in the schematic drawings illustrate:
1. an oil tank; 2. b, an oil way; 3. a hydraulic motor; 4. an oil replenishing pump; 5. an oil supply circuit pressure instrument; 6. oil supply; 7. b, an oil way pressure instrument; 8. b, an oil way oil supplementing valve; 9. a main hydraulic pump; 10. a prime mover; 11. a variable control structure; 12. a, an oil way pressure instrument; 13. a, an oil way oil supplementing valve; 14. an oil drain valve; 15. a hydraulic pressure valve; 16. a cooler; 17. an oil way A; 18. an oil filter; 19. a, an oil path throttle valve; 20. b, an oil path throttle valve; 21. a, an oil way one-way throttle valve; 22. b, an oil way one-way throttle valve; 23. a oil way one-way sequence valve; 24. and B, an oil way one-way sequence valve.
Detailed Description
The detailed description and exemplary embodiments of the invention will be better understood when read in conjunction with the appended drawings, where the elements and features of the invention are identified by reference numerals.
The invention discloses a method for solving the false action of a valve element of an oil changing valve under the low-load working condition of a closed hydraulic system, wherein a hydraulic pump (9) of the closed hydraulic system is communicated with a hydraulic actuator (3) through an oil way A (17) and an oil way B (2), the oil way A (17) and the oil way B (2) are connected with the oil changing valve (14) through an oil pipe, the flowing resistance of oil in the oil way A (17) and/or the oil way B (2) is increased, and the pressure difference between the oil way A (17) and the oil way B (2) at two sides of the oil changing valve (14) is increased in the embodiment that the flowing resistance of the oil in the oil way A (17) and/or the oil way B (2) is increased: and a throttle valve and/or a one-way sequence valve are/is arranged on the oil way A (17) and/or the oil way B (2). When the oil flows from the oil passage A (17) to the oil passage B (2), the resistance of the oil flowing in the oil passage A (17) is increased; and/or increasing the resistance of the oil flowing in the oil passage B (2) when the oil flows from the oil passage B (2) to the oil passage A (17). When oil flows from the oil passage A (17) to the oil passage B (2), a throttle valve and/or a one-way sequence valve are arranged on the oil passage A (17); and/or oil flows from the oil passage B (2) to the oil passage A (17), and a throttle valve and/or a one-way sequence valve are arranged on the oil passage B (2).
As shown in fig. 1, the closed hydraulic system employed in the present invention includes: the hydraulic control system comprises an oil tank 1, an oil circuit B2, a hydraulic motor 3, an oil supplementing pump 4, an oil supplementing circuit pressure instrument 5, an oil supplementing circuit 6, an oil circuit B pressure instrument 7, an oil supplementing valve B8, a main hydraulic pump 9, a prime motor 10, a variable control structure 11, an oil circuit A pressure instrument 12, an oil supplementing valve A13, an oil supplementing valve 14, an oil supplementing pressure valve 15, a cooler 16, an oil circuit A17 and an oil filter 18. The prime motor is generally an electric motor, an oil supplementing pump 4 and a main hydraulic pump 9 are driven through a coupler, the oil supplementing pump 4 absorbs oil from an oil tank 1, and the oil is conveyed to a low-pressure side oil circuit of the main hydraulic pump 9 through an oil supplementing valve. When oil flows from the oil circuit A17 to the oil circuit B2 through the hydraulic motor 3, the oil circuit A17 is an oil outlet circuit of the main hydraulic pump 9, the oil circuit B2 is an oil inlet circuit of the main hydraulic pump 9, the pressure of the oil circuit A17 is higher than that of the oil circuit B2, and the output oil of the oil supplementing pump 4 is output to the oil circuit B2 through an oil supplementing valve 8 of the oil circuit B2; on the contrary, when the oil flow direction changes, the output oil of the oil supply pump 4 is output to the oil passage A17 through the oil supply valve A17, and except the leakage in the oil supply system, the rest oil output by the oil supply pump 4 flows to the oil supply pressure valve 15 through the oil change valve 14, and then returns to the oil tank through the cooler 16 and the oil filter 18; in this embodiment, the oil control valve 14 is a hydraulic change valve. Under the working condition of low load, the load of the hydraulic motor 3 is very small, so the working pressure difference of the hydraulic motor 3 is very small, so that the pressure difference between the oil circuit A17 and the oil circuit B is very small, generally less than or equal to 1MPa, as can be seen from the schematic diagram of the hydraulic system in figure 2, the valve core of the oil valve 14 is in an initial state, the valve core is acted by spring forces at two ends and is in a neutral position, when the system operates, the pressure of the oil circuit A17 is acted on a left cavity of the valve core, the pressure of the oil circuit B2 is acted on a right cavity of the valve core, the reversing of the valve core is controlled by the pressure difference delta P between the oil circuit A17 and the oil circuit B2, when the hydraulic pressure of the delta P acted on the valve core is greater than the spring force acted on the valve core by the spring, the valve core is reversed to the left position or the right position and is kept, when the hydraulic pressure of the delta P, or the valve core is not moved in the middle position, or the valve core is not moved reliably, or the valve core is not controlled to move, so that the pressure of the oil supplementing circuit 6, the pressure of the oil circuit A17 and the pressure of the oil circuit B2 fluctuate, and the stable operation of the system is influenced.
The use method of the closed hydraulic system comprises the steps that a throttle valve 19 and a throttle valve 20 are added to an oil path A17, or a one-way throttle valve 21 and a one-way throttle valve 22 are added to an oil path A17, or a one-way sequence valve 23 and a one-way sequence valve 24 are added to an oil path B17 of the closed hydraulic system; a throttle valve 19 is added to the oil path A17, a one-way throttle valve 21 is added to the oil path A17, or a one-way sequence valve 23 is added to the oil path A17; or a throttle valve 20 is added to the B oil circuit 2 of the closed hydraulic system, or a one-way throttle valve 22 is added to the B oil circuit 2, or a one-way sequence valve 24 is added to the B oil circuit 2.
The closed hydraulic system is under the low load working condition: if the oil flows from the A oil path 17 to the B oil path 2 only through the hydraulic motor 3 during the system operation, the throttle valve 19, the one-way throttle valve 21 or the one-way sequence valve 23 can be added to the A oil path 17 only.
If the oil flows from the B oil path 2 to the A oil path 17 only through the hydraulic motor 3 during the system operation, the throttle valve 20, the one-way throttle valve 22 or the one-way sequence valve 24 can be added to the B oil path 2 only.
If the oil liquid has two working conditions that the oil liquid flows from the oil circuit A17 to the oil circuit B2 through the hydraulic motor 3 and flows from the oil circuit B2 to the oil circuit A17 through the hydraulic motor 3 when the system works, a throttle valve 19 can be singly added to the oil circuit A17, or a throttle valve 20 can be singly added to the oil circuit B2; or simultaneously adding a throttle 19 to the A oil path 17 and a throttle 20 to the B oil path 2 (as shown in FIG. 2); or simultaneously adding a one-way throttle valve 21 in the A oil way 17 and a one-way throttle valve 22 in the B oil way 2 (shown in FIG. 3); or simultaneously adding a one-way sequence valve 23 to the A oil way 17 and a one-way sequence valve 24 to the B oil way 2 (as shown in FIG. 4). The throttle valve or the one-way sequence valve can be added to increase the pressure difference delta P between the oil circuit 17A and the oil circuit 2B of the main hydraulic pump 9, so that the hydraulic pressure of the delta P acting on the valve core of the oil change valve 14 is larger than the spring force of the spring acting on the valve core, the valve core of the oil change valve 14 can be ensured to act as required, and the misoperation is avoided. The throttle valve or the one-way throttle valve can change the pressure loss flowing through the throttle valve by changing the section size of the flow passage or the length of the flow passage; the throttle valve or the one-way throttle valve is a hydraulic throttle valve or a one-way hydraulic throttle valve, or an element capable of changing the cross section size or the length of the flow passage; the throttle valve or the one-way throttle valve can be manually adjusted or cannot be manually adjusted; the throttle valve or the one-way throttle valve is mounted in a pipeline mode or a plate mode; and the specification of the throttle valve or the one-way throttle valve is matched and selected according to the flow of the closed hydraulic system. The one-way sequence valve adopts a leakage mode, leaked oil directly returns to the oil tank, the sequence valve adopts a pipeline installation mode or a plate installation mode, and the pressure set value of the sequence valve can be manually adjusted; the specification of the sequence valve can be matched and selected according to the flow of the closed hydraulic system. The plate-type installation is that a plate-type installation valve is selected, a special valve block for plate-type installation is used, and the plate-type installation valve is installed on the valve block.
The invention has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to be illustrative of the state of the art as developed and the meaning of the present technology and is not intended to limit the scope of the invention or the application and field of application of the invention.
Claims (10)
1. The method for solving the misoperation of the valve core of the oil changing valve under the low-load working condition of the closed hydraulic system is characterized in that a hydraulic pump (9) of the closed hydraulic system is communicated with a hydraulic actuator (3) through an oil circuit A (17) and an oil circuit B (2), the oil circuit A (17) and the oil circuit B (2) are connected with the oil changing valve (14) through an oil pipe, the flowing resistance of oil in the oil circuit A (17) and/or the oil circuit B (2) is increased, and the pressure difference between the oil circuit A (17) and the oil circuit B (2) on two sides of the oil changing valve (14) is increased.
2. The method for solving the malfunction of the valve element of the oil changing valve in the closed type hydraulic system under the low load working condition according to claim 1, wherein the mode for increasing the resistance of the oil flow in the oil passage A (17) and/or the oil passage B (2) is as follows: and a throttle valve and/or a one-way sequence valve are/is arranged on the oil way A (17) and/or the oil way B (2).
3. The method for solving the malfunction of the valve core of the oil changing valve in the low-load working condition of the closed hydraulic system according to claim 1, characterized in that when oil flows from the oil passage A (17) to the oil passage B (2), the resistance of the oil flowing in the oil passage A (17) is increased; and/or increasing the resistance of the oil flowing in the oil passage B (2) when the oil flows from the oil passage B (2) to the oil passage A (17).
4. The method for solving the misoperation of the valve core of the oil changing valve under the low-load working condition of the closed hydraulic system according to claim 1 is characterized in that the used closed hydraulic system comprises a hydraulic pump (9), a hydraulic actuator (3) and an oil tank (1), one end of the hydraulic pump (9) is communicated with one end of the hydraulic actuator (3) through an oil path A (17), and one end of the hydraulic pump (9) is communicated with one end of the hydraulic actuator (3) through an oil path B (2); the oil circuit A (17) and the oil circuit B (2) are respectively connected with the oil tank (1) through an oil supplementing circuit (6), and an oil supplementing pump (4) is arranged on the oil supplementing circuit (6); an oil change valve (14) is connected between the oil circuit A (17) and the oil circuit B (2) through an oil pipe, and the oil change valve (14) is communicated to the oil tank (1); and a throttle valve and/or a one-way sequence valve are/is arranged on the oil way A (17) and/or the oil way B (2).
5. The method for solving the malfunction of the valve core of the oil changing valve in the low-load working condition of the closed hydraulic system according to the claim 2 is characterized in that when oil flows from the oil passage A (17) to the oil passage B (2), a throttle valve and/or a one-way sequence valve are arranged on the oil passage A (17);
and/or oil flows from the oil passage B (2) to the oil passage A (17), and a throttle valve and/or a one-way sequence valve are arranged on the oil passage B (2).
6. The method for solving the misoperation of the valve core of the oil changing valve under the low-load working condition of the closed hydraulic system according to claim 2, wherein the throttle valve is a hydraulic throttle valve; and/or the one-way throttle valve is a one-way hydraulic throttle valve.
7. The method for solving the misoperation of the valve core of the oil changing valve in the low-load working condition of the closed hydraulic system according to claim 2, wherein the throttle valve and/or the one-way sequence valve are mounted through a pipeline or in a plate manner.
8. The method for solving the misoperation of the valve core of the oil replacement valve under the low-load working condition of the closed hydraulic system according to claim 4 is characterized in that an oil supplement valve (13) of an oil way A and an oil supplement valve (8) of an oil way B are arranged on the oil supplement circuit (6), and the oil supplement circuit (6) between the oil supplement valve (13) of the oil way A and the oil supplement valve (8) of the oil way B is communicated with an oil tank (1) through an oil supplement pump (4); the oil circuit A oil circuit oil supplementing valve (13) and the oil circuit B oil supplementing valve (8) are two one-way valves which are connected in series in an opposite direction.
9. The method for solving the malfunction of the valve core of the oil replacement valve in the closed type hydraulic system under the low load working condition is characterized in that the oil replacement valve (14) is communicated to the oil tank (1) through an oil replacement pressure valve (15).
10. The method for solving the misoperation of the valve core of the oil changing valve under the low-load working condition of the closed hydraulic system according to any one of claims 4 to 9, wherein a pressure gauge and/or a pressure transmitter and/or a pressure switch are arranged on the oil way A (17) and/or the oil way B (2) and/or the oil supplementing way (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952326.XA CN112065788B (en) | 2020-09-11 | 2020-09-11 | Method for solving misoperation of valve core of oil-filling valve under low-load working condition of closed hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952326.XA CN112065788B (en) | 2020-09-11 | 2020-09-11 | Method for solving misoperation of valve core of oil-filling valve under low-load working condition of closed hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112065788A true CN112065788A (en) | 2020-12-11 |
| CN112065788B CN112065788B (en) | 2023-06-09 |
Family
ID=73696486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010952326.XA Active CN112065788B (en) | 2020-09-11 | 2020-09-11 | Method for solving misoperation of valve core of oil-filling valve under low-load working condition of closed hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112065788B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023035367A1 (en) * | 2021-09-13 | 2023-03-16 | 烟台杰瑞石油装备技术有限公司 | Fully-hydraulic automatic control system and pressure setting method therefor, and rope sawing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201069A (en) * | 2007-12-18 | 2008-06-18 | 浙江大学 | Variable frequency pump-control-motor closed circuit based on energy regulation |
| CN201461601U (en) * | 2009-08-24 | 2010-05-12 | 长安大学 | Electrical control hydraulic unidirectional constant speed device |
| CN201747703U (en) * | 2010-05-25 | 2011-02-16 | 长沙中联重工科技发展股份有限公司 | Sealed hydraulic system |
| CN102996539A (en) * | 2012-12-26 | 2013-03-27 | 中联重科股份有限公司 | Single-pump multi-motor unidirectional rotating closed type hydraulic system and engineering machinery comprising same |
| CN107701524A (en) * | 2017-11-10 | 2018-02-16 | 浙江大学 | A kind of energy feedback system of TBM hybrid-drivens cutterhead |
-
2020
- 2020-09-11 CN CN202010952326.XA patent/CN112065788B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201069A (en) * | 2007-12-18 | 2008-06-18 | 浙江大学 | Variable frequency pump-control-motor closed circuit based on energy regulation |
| CN201461601U (en) * | 2009-08-24 | 2010-05-12 | 长安大学 | Electrical control hydraulic unidirectional constant speed device |
| CN201747703U (en) * | 2010-05-25 | 2011-02-16 | 长沙中联重工科技发展股份有限公司 | Sealed hydraulic system |
| CN102996539A (en) * | 2012-12-26 | 2013-03-27 | 中联重科股份有限公司 | Single-pump multi-motor unidirectional rotating closed type hydraulic system and engineering machinery comprising same |
| CN107701524A (en) * | 2017-11-10 | 2018-02-16 | 浙江大学 | A kind of energy feedback system of TBM hybrid-drivens cutterhead |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023035367A1 (en) * | 2021-09-13 | 2023-03-16 | 烟台杰瑞石油装备技术有限公司 | Fully-hydraulic automatic control system and pressure setting method therefor, and rope sawing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112065788B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101858340B (en) | Variabler-hub-getriebepumpe-steuerung | |
| CN205478600U (en) | Constant voltage variable pump | |
| CN108291560A (en) | Pressure compensation unit | |
| CN101191507A (en) | Hydraulic system for tunneling machine | |
| CN1862031A (en) | Anti jerk valve | |
| CN112065788A (en) | Method for solving false operation of valve core of oil replacement valve under low-load working condition of closed hydraulic system | |
| US20100037603A1 (en) | Hydralic two-circuit system and interconnecting valve system | |
| CN112065789A (en) | Closed hydraulic system | |
| CN111608982A (en) | Hydraulic system of lifting platform | |
| CN113007157A (en) | Load-sensitive multi-way valve, boom hydraulic control system and concrete pump truck | |
| US7055318B2 (en) | Drive mechanism | |
| CN210565427U (en) | Hydraulic valve group of unmanned agricultural machine | |
| US3807443A (en) | Power transmission | |
| CN101278132B (en) | Hydraulic control device | |
| CN114207295B (en) | Hydraulic system | |
| CN216430099U (en) | Hydraulic control valve group, hydraulic system and operation machine | |
| CN108975188B (en) | Hydraulic system | |
| CN110285104B (en) | Fixed-difference overflow valve and engineering machinery | |
| CN110594222A (en) | Hydraulic valve group of unmanned agricultural machine | |
| CN102483077A (en) | Arrangement for providing a variable throttle cross-section for a fluid flow | |
| CN216812329U (en) | Integrated valve group, hydraulic system and loader | |
| CN219809195U (en) | Hydraulic system and vehicle | |
| CN219509912U (en) | Proportional pressure control loop | |
| CN216447207U (en) | Pump opening hydraulic control system and double-pump hydraulic system | |
| US7854116B2 (en) | Hydraulic pump flow shut-off valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |