CN209761890U - High-low pressure switching oil source system with pressure relief and protection functions - Google Patents
High-low pressure switching oil source system with pressure relief and protection functions Download PDFInfo
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- CN209761890U CN209761890U CN201920489764.XU CN201920489764U CN209761890U CN 209761890 U CN209761890 U CN 209761890U CN 201920489764 U CN201920489764 U CN 201920489764U CN 209761890 U CN209761890 U CN 209761890U
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Abstract
The utility model discloses a take high-low pressure switching oil supply system of release and protect function relates to hydraulic system oil supply design technical field, when having solved and having used the integrated valve piece to carry out the switching of hydraulic system crowning low pressure, oil supply system does not have release and protect function's problem, and its technical scheme main points are: the system comprises a control system, an oil tank, an oil outlet pipe and an oil return pipe, wherein the oil tank is connected with a low-pressure pump, a high-pressure pump, an energy accumulator and a proportional overflow valve through pipelines; an oil outlet of the low-pressure pump is connected with a hydraulic control unloading valve, and a hydraulic hose is connected between the hydraulic control unloading valve and an oil tank; the oil outlet of the high-pressure pump is connected with a normally open electromagnetic switch valve, the normally open electromagnetic switch valve is connected with the oil outlet pipe, and the normally open electromagnetic switch valve is positioned between the energy accumulator and the proportional overflow valve; one-way valves are arranged between the low-pressure pump and the hydraulic control unloading valve and between the high-pressure pump and the normally open electromagnetic switch valve. The oil source system has the pressure relief function when switching between low pressure and high pressure, and can protect the actuating mechanism.
Description
Technical Field
The utility model relates to a hydraulic system oil source design technical field, more specifically say, it relates to a take high-low pressure switching oil source system of release and protect function.
Background
At present, the running mode of the wind tunnel flexible wall spray pipe actuating mechanism generally adopts a mode of low-pressure action and high-pressure locking, namely low-pressure oil supply is adopted in the mechanism action process, and high-pressure oil supply is used for locking after the actuating mechanism is in place. This requires that the oil source system must have the function of fast switching between low pressure and high pressure, and in order to ensure the reliability of the system operation, an accumulator must be used as an emergency energy source and absorb the pressure pulsation during the operation. However, when the high pressure is switched to the low pressure, the high pressure stored in the energy accumulator needs to be released quickly, otherwise, the pressure in the system vibrates greatly to damage the actuating mechanism, so the oil source system also needs to have a pressure relief function, the pressure in the energy accumulator is completely removed to cause waste, and the time consumption is increased because the low pressure is required to be started again for action in the next working condition after the high pressure is locked. In addition, when the actuator is operated at low pressure, high pressure is not allowed to enter the system, so that the actuator is prevented from being damaged.
In the prior art, an integrated valve block is mostly used for realizing the function of switching high and low pressures in a hydraulic system, but the integrated valve block belongs to a non-standard part, so that the manufacturing cost is high due to more internal pipelines and complex structure. Due to the fact that parameters such as pressure and discharge capacity required by pumps of different models are different, the universal difficulty of parts is further increased. In addition, because the pressure relief and protection functions in application are not considered, the number of elements is large, the system is complex, the power of the hydraulic system is greatly lost by the conventional high-low pressure switching system, the heat of the system is increased, and the service life of the hydraulic element is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a take high-low pressure switching oil source system of release and protect function has the in-process that makes oil source system switch at low pressure and high pressure and possesses the release function, can carry out the effect protected to actuating mechanism simultaneously.
The above technical purpose of the present invention can be achieved by the following technical solutions: a high-low pressure switching oil source system with pressure relief and protection functions comprises a control system, an oil tank, an oil outlet pipe and an oil return pipe, wherein the oil tank is connected with a low-pressure pump, a high-pressure pump, an energy accumulator and a proportional overflow valve through pipelines; an oil outlet of the low-pressure pump is connected with a hydraulic control unloading valve, and the hydraulic control unloading valve is connected with an oil tank and an oil outlet pipe; the oil outlet of the high-pressure pump is connected with a normally open electromagnetic switch valve, the normally open electromagnetic switch valve is connected with the oil outlet pipe, and the normally open electromagnetic switch valve is positioned between the energy accumulator and the proportional overflow valve; and one-way valves are arranged between the low-pressure pump and the hydraulic control unloading valve and between the high-pressure pump and the normally open electromagnetic switch valve.
By adopting the technical scheme, when the actuating mechanism needs to act, the control system in the hydraulic system controls the oil source system to work, firstly, the control system controls and starts the low-pressure pump to work, so that hydraulic oil in the oil tank is pumped out from the oil outlet of the oil tank, and the system pressure of the hydraulic system is formed; the hydraulic control unloading valve is used for unloading or reducing the pressure load of the system and setting the pressure of the system, so that the stability of the hydraulic pressure can be ensured; then hydraulic oil enters the system through an oil outlet of the oil outlet pipe and fills the accumulator with liquid; when the pressure in the energy accumulator is consistent with the pressure set by the hydraulic control unloading valve and the actuating mechanism is in place, the control system controls the low-pressure pump to stop running and controls the high-pressure pump to start to work; when the high-pressure pump works, the high pressure required by locking of the actuating mechanism is set through the proportional overflow valve; then, the hydraulic oil continuously flows through the oil outlet of the oil outlet pipe to charge the accumulator, and when the pressure in the accumulator is consistent with the pressure set by the proportional overflow valve, the charging is stopped; when the actuating mechanism needs to reversely act, the control system controls the high-pressure pump to stop working, then controls the proportional overflow valve to discharge a part of pressure in the energy accumulator and reduce the system pressure to the pressure required by the actuating mechanism to act, so that emergency energy required by the system is met, waste of oil pressure is avoided, and working condition time consumption is shortened; when the pressure in the accumulator is discharged to the pressure set by the proportional overflow valve, the control system controls the low-pressure pump to start again to work; through the one-way valve, high pressure in the system can not be discharged when passing through the hydraulic control unloading valve, and meanwhile, the high pressure in the system can not reversely enter the low-pressure pump, so that the low-pressure pump is protected conveniently; the system is convenient to protect the actuating mechanism through the normally open electromagnetic switch valve, the system can check whether the low-pressure pump is in a starting state before starting the high-pressure pump every time, if the low-pressure pump is started, the normally open electromagnetic switch valve is electrified, so that high pressure is cut off, in an emergency state, the low-pressure pump is stopped, and if the mechanism is not in place, the high-pressure pump is started, and an oil source can be cut off by using the normally open electromagnetic switch valve; in the process of quickly switching low pressure and high pressure of the oil source system, the oil source system has the pressure relief function and can protect the actuating mechanism through the proportional overflow valve, the check valve and the normally open electromagnetic switch valve.
The utility model discloses further set up to: a first filter is arranged between the oil tank and the low-pressure pump; and a second filter is arranged between the oil tank and the high-pressure pump.
Through adopting above-mentioned technical scheme, through first filter and second filter, be convenient for filter the impurity in the hydraulic oil to maintain the cleanness of hydraulic oil, thereby guarantee hydraulic system's normal work.
the utility model discloses further set up to: and hydraulic hoses are arranged between the hydraulic control unloading valve and the oil tank, between the second filter and the high-pressure pump, between the high-pressure pump and the oil tank, between the first filter and the low-pressure pump, between the low-pressure pump and the oil tank, between the oil tank and the proportional overflow valve, between the high-pressure pump and the one-way valve and between the low-pressure pump and the one-way valve.
By adopting the technical scheme, the hydraulic hose is convenient for installation and maintenance of each component in the oil source system and delivery of hydraulic oil.
The utility model discloses further set up to: the oil outlet pipe is connected with a pressure transmitter; the pressure transmitter is positioned between the oil outlet pipe and the normally open electromagnetic switch valve.
Through adopting above-mentioned technical scheme, through pressure transmitter, be convenient for monitor the pressure in the energy storage ware.
The utility model discloses further set up to: the energy accumulator is connected with a first stop valve, and the first stop valve is connected with the normally open electromagnetic switch valve and the oil outlet pipe; an oil outlet of the oil outlet pipe is connected with a second stop valve; and an oil inlet of the oil return pipe is connected with a third stop valve.
By adopting the technical scheme, the first stop valve is convenient for cutting off and throttling the hydraulic oil in the pipeline connected with the energy accumulator, so that the operation of charging the energy accumulator is convenient to control; the second stop valve is convenient for cutting off and throttling the hydraulic oil in the oil outlet pipe; through the third stop valve, the operation of cutting off and throttling the hydraulic oil in the oil return pipe is facilitated.
To sum up, the utility model discloses following beneficial effect has: the low-pressure pump is used for conveniently supplying oil to the hydraulic system in the oil tank at low pressure; the high-pressure pump is used for conveniently locking the oil source system in a high-pressure oil supply mode; the hydraulic control unloading valve is used for unloading or reducing the pressure load of the system and setting the pressure of the system, so that the stability of the hydraulic pressure can be ensured; then hydraulic oil enters the system through an oil outlet of the oil outlet pipe and fills the accumulator with liquid; when the pressure in the energy accumulator is consistent with the pressure set by the hydraulic control unloading valve and the actuating mechanism is in place, the control system controls the low-pressure pump to stop running and controls the high-pressure pump to start to work; when the high-pressure pump works, the hydraulic pressure is conveniently adjusted through the proportional overflow valve; then, the hydraulic oil continuously flows through the oil outlet of the oil outlet pipe to charge the accumulator, and when the pressure in the accumulator is consistent with the pressure set by the proportional overflow valve, the charging is stopped; when the actuating mechanism needs to reversely act, the control system controls the high-pressure pump to stop working, then controls the proportional overflow valve to discharge a part of pressure in the energy accumulator and reduce the system pressure to the pressure required by the actuating mechanism to act, so that emergency energy required by the system is met, waste of oil pressure is avoided, and working condition time consumption is shortened; when the pressure in the accumulator is discharged to the pressure set by the proportional overflow valve, the control system controls the low-pressure pump to start again to work; through the one-way valve, high pressure in the system can not be discharged when passing through the hydraulic control unloading valve, and meanwhile, the high pressure in the system can not reversely enter the low-pressure pump, so that the low-pressure pump is protected conveniently; the system is convenient to protect the actuating mechanism through the normally open electromagnetic switch valve, the system can check whether the low-pressure pump is in a starting state before starting the high-pressure pump every time, if the low-pressure pump is started, the normally open electromagnetic switch valve is electrified, so that high pressure is cut off, in an emergency state, the low-pressure pump is stopped, and if the mechanism is not in place, the high-pressure pump is started, and an oil source can be cut off by using the normally open electromagnetic switch valve; in the process of quickly switching low pressure and high pressure of the oil source system, the oil source system has the pressure relief function and can protect the actuating mechanism through the proportional overflow valve, the check valve and the normally open electromagnetic switch valve.
Drawings
Fig. 1 is a schematic diagram in an embodiment of the present invention.
In the figure: 1. a first filter; 2. a low pressure pump; 3. a one-way valve; 4. a hydraulic control unloading valve; 5. a pressure transmitter; 6. an accumulator; 7. a normally open electromagnetic switch valve; 8. a proportional relief valve; 9. a hydraulic hose; 10. a high pressure pump; 11. an oil tank; 12. a second filter; 13. an oil outlet pipe; 14. an oil return pipe; 15. a first shut-off valve; 16. a second stop valve; 17. a third stop valve.
Detailed Description
The present invention will be described in further detail with reference to fig. 1.
Example (b): a high-low pressure switching oil source system with pressure relief and protection functions is shown in figure 1 and comprises a control system, an oil tank 11, an oil outlet pipe 13 and an oil return pipe 14, wherein the oil tank 11 is connected with a low-pressure pump 2, a high-pressure pump 10, an energy accumulator 6 and a proportional overflow valve 8 through pipelines. An oil outlet of the low-pressure pump 2 is connected with a hydraulic unloading valve 4, and the hydraulic unloading valve 4 is connected with an oil tank 11 and an oil outlet pipe 13. An oil outlet of the high-pressure pump 10 is connected with a normally open electromagnetic switch valve 7, the normally open electromagnetic switch valve 7 is connected with an oil outlet pipe 13, and the normally open electromagnetic switch valve 7 is located between the energy accumulator 6 and the proportional overflow valve 8. And one-way valves 3 are arranged between the low-pressure pump 2 and the hydraulic control unloading valve 4 and between the high-pressure pump 10 and the normally open electromagnetic switch valve 7.
In the embodiment, when the actuator needs to be actuated, the control system in the hydraulic system controls the oil source system to operate, and firstly, the control system controls the start low-pressure pump 2 to operate, so that the hydraulic oil in the oil tank 11 is pumped out from the oil outlet of the oil tank 11, and the system pressure of the hydraulic system is formed. Through the hydraulic control unloading valve 4, the pressure load of the system is unloaded or reduced, and the pressure of the system is set, so that the stability of the hydraulic pressure can be ensured. Then the hydraulic oil enters the system through the oil outlet of the oil outlet pipe 13 and charges the accumulator 6. When the pressure in the accumulator 6 is consistent with the pressure set by the hydraulic control unloading valve 4 and the actuating mechanism is in place, the control system controls the low-pressure pump 2 to stop running and controls the high-pressure pump 10 to start to work. During the operation of the high-pressure pump 10, the high pressure required for locking the actuating mechanism is set through the proportional overflow valve 8. And then, the hydraulic oil continuously flows through the oil outlet of the oil outlet pipe 13 to charge the energy accumulator 6, and when the pressure in the energy accumulator 6 is consistent with the pressure set by the proportional overflow valve 8, the charging is stopped. When the actuator needs to act reversely, the control system controls the high-pressure pump 10 to stop working, then controls the proportional overflow valve 8 to discharge a part of the pressure in the accumulator 6, and reduces the system pressure to the pressure needed by the actuator to act. When the pressure in the accumulator 6 is discharged to the pressure set by the proportional overflow valve 8, the control system controls the low-pressure pump 2 to start again to work. Through the check valve 3, high pressure in the system can not be discharged when passing through the hydraulic control unloading valve 4, and meanwhile, the high pressure in the system can not reversely enter the low-pressure pump 2, so that the low-pressure pump 2 is protected conveniently. Through normally open solenoid switch valve 7, be convenient for protect actuating mechanism, before the system starts high-pressure pump 10 at every turn, all can check whether low-pressure pump 2 is in the starting condition, will give normally open solenoid switch valve 7 electricity if low-pressure pump 2 has started to cut off the high pressure, also can use normally open solenoid switch valve 7 under emergency. In the process of quickly switching the low pressure and the high pressure of the oil source system, the proportional overflow valve 8, the check valve 3 and the normally open electromagnetic switch valve 7 are used for enabling the oil source system to have the pressure relief function and protecting an actuating mechanism.
A first filter 1 is installed between the oil tank 11 and the low pressure pump 2. A second filter 12 is installed between the oil tank 11 and the high-pressure pump 10.
In the embodiment, the first filter 1 and the second filter 12 are used for filtering out impurities in the hydraulic oil, so that the cleanness of the hydraulic oil is maintained, and the normal operation of a hydraulic system is ensured.
Hydraulic hoses 9 are connected between the hydraulic control unloading valve 4 and the oil tank 11, between the second filter 12 and the high-pressure pump 10, between the high-pressure pump 10 and the oil tank 11, between the first filter 1 and the low-pressure pump 2, between the low-pressure pump 2 and the oil tank 11, between the oil tank 11 and the proportional overflow valve 8, between the high-pressure pump 10 and the check valve 3, and between the low-pressure pump 2 and the check valve 3.
In this embodiment, the hydraulic hose 9 is used to facilitate installation and maintenance of each component in the oil source system and transportation of hydraulic oil.
The oil outlet pipe 13 is connected with a pressure transmitter 5. The pressure transmitter 5 is positioned between the oil outlet pipe 13 and the normally open electromagnetic switch valve 7.
In the present embodiment, the pressure in the accumulator 6 can be monitored by means of the pressure transmitter 5.
The accumulator 6 is connected with a first stop valve 15, and the first stop valve 15 is connected with the normally open electromagnetic switch valve 7 and the oil outlet pipe 13. The oil outlet of the oil outlet pipe 13 is connected with a second stop valve 16. The oil inlet of the oil return pipe 14 is connected with a third stop valve 17.
In the present embodiment, the operation of shutting off and throttling the hydraulic oil in the line connected to the accumulator 6 is facilitated by the first shut-off valve 15, thereby facilitating the control of the operation of charging the accumulator 6. By the second stop valve 16, the operation of shutting off and throttling the hydraulic oil in the oil outlet pipe 13 is facilitated. By means of the third shut-off valve 17, the operation of shutting off and throttling the hydraulic oil in the return pipe 14 is facilitated.
The working principle is as follows: when the actuator needs to act, the control system in the hydraulic system controls the oil source system to work, and firstly, the control system controls the starting low-pressure pump 2 to work, so that the hydraulic oil in the oil tank 11 is pumped out from the oil outlet of the oil tank 11, and the system pressure of the hydraulic system is formed. Through the hydraulic control unloading valve 4, the pressure load of the system is unloaded or reduced, and the pressure of the system is set, so that the stability of the hydraulic pressure can be ensured. Then the hydraulic oil enters the system through the oil outlet of the oil outlet pipe 13 and charges the accumulator 6. When the pressure in the accumulator 6 is consistent with the pressure set by the hydraulic control unloading valve 4 and the actuating mechanism is in place, the control system controls the low-pressure pump 2 to stop running and controls the high-pressure pump 10 to start to work. During the operation of the high-pressure pump 10, the high pressure required for locking the actuating mechanism is set through the proportional overflow valve 8. And then, the hydraulic oil continuously flows through the oil outlet of the oil outlet pipe 13 to charge the energy accumulator 6, and when the pressure in the energy accumulator 6 is consistent with the pressure set by the proportional overflow valve 8, the charging is stopped. When the actuator needs to act reversely, the control system controls the high-pressure pump 10 to stop working, then controls the proportional overflow valve 8 to discharge a part of the pressure in the energy accumulator 6, and reduces the system pressure to the pressure required by the actuator to act, so that the emergency energy required by the system is met, the waste of oil pressure is avoided, and the working condition time is shortened. When the pressure in the accumulator 6 is discharged to the pressure set by the proportional overflow valve 8, the control system controls the low-pressure pump 2 to start again to work. Through the check valve 3, high pressure in the system can not be discharged when passing through the hydraulic control unloading valve 4, and meanwhile, the high pressure in the system can not reversely enter the low-pressure pump 2, so that the low-pressure pump 2 is protected conveniently. Through normally open solenoid switch valve 7, be convenient for protect actuating mechanism, before the system starts high-pressure pump 10 at every turn, all can inspect whether low-pressure pump 2 is in the starting condition, will give normally open solenoid switch valve 7 electricity if low-pressure pump 2 has started to cut off the high pressure, under emergency, low-pressure pump 2 stops, if the mechanism does not target in place, high-pressure pump 10 has started, also can use normally open solenoid switch valve 7 to cut off the oil supply. In the process of quickly switching the low pressure and the high pressure of the oil source system, the proportional overflow valve 8, the check valve 3 and the normally open electromagnetic switch valve 7 are used for enabling the oil source system to have the pressure relief function and protecting an actuating mechanism.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (5)
1. The utility model provides a take high-low pressure of release and protect function to switch oil source system, includes control system, oil tank (11), goes out oil pipe (13) and returns oil pipe (14), characterized by: the oil tank (11) is connected with a low-pressure pump (2), a high-pressure pump (10), an energy accumulator (6) and a proportional overflow valve (8) through pipelines; an oil outlet of the low-pressure pump (2) is connected with a hydraulic unloading valve (4), the hydraulic unloading valve (4) is connected with an oil tank (11) and an oil outlet pipe (13), and a hydraulic hose (9) is connected between the hydraulic unloading valve (4) and the oil tank (11); an oil outlet of the high-pressure pump (10) is connected with a normally open electromagnetic switch valve (7), the normally open electromagnetic switch valve (7) is connected with an oil outlet pipe (13), and the normally open electromagnetic switch valve (7) is positioned between the energy accumulator (6) and the proportional overflow valve (8); and one-way valves (3) are arranged between the low-pressure pump (2) and the hydraulic control unloading valve (4) and between the high-pressure pump (10) and the normally open electromagnetic switch valve (7).
2. The high-low pressure switching oil source system with the pressure relief and protection functions as claimed in claim 1, which is characterized in that: a first filter (1) is arranged between the oil tank (11) and the low-pressure pump (2); and a second filter (12) is arranged between the oil tank (11) and the high-pressure pump (10).
3. The high-low pressure switching oil source system with the pressure relief and protection functions as claimed in claim 2, wherein: and hydraulic hoses (9) are arranged between the second filter (12) and the high-pressure pump (10), between the high-pressure pump (10) and the oil tank (11), between the first filter (1) and the low-pressure pump (2), between the low-pressure pump (2) and the oil tank (11), between the oil tank (11) and the proportional overflow valve (8), between the high-pressure pump (10) and the check valve (3) and between the low-pressure pump (2) and the check valve (3).
4. The high-low pressure switching oil source system with the pressure relief and protection functions as claimed in claim 1, which is characterized in that: the oil outlet pipe (13) is connected with a pressure transmitter (5); and the pressure transmitter (5) is positioned between the oil outlet pipe (13) and the normally open electromagnetic switch valve (7).
5. The high-low pressure switching oil source system with the pressure relief and protection functions as claimed in claim 1, which is characterized in that: the energy accumulator (6) is connected with a first stop valve (15), and the first stop valve (15) is connected with the normally open electromagnetic switch valve (7) and the oil outlet pipe (13); an oil outlet of the oil outlet pipe (13) is connected with a second stop valve (16); an oil inlet of the oil return pipe (14) is connected with a third stop valve (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920489764.XU CN209761890U (en) | 2019-04-11 | 2019-04-11 | High-low pressure switching oil source system with pressure relief and protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920489764.XU CN209761890U (en) | 2019-04-11 | 2019-04-11 | High-low pressure switching oil source system with pressure relief and protection functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209761890U true CN209761890U (en) | 2019-12-10 |
Family
ID=68759149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920489764.XU Expired - Fee Related CN209761890U (en) | 2019-04-11 | 2019-04-11 | High-low pressure switching oil source system with pressure relief and protection functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209761890U (en) |
-
2019
- 2019-04-11 CN CN201920489764.XU patent/CN209761890U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 Termination date: 20210411 |