CN217735874U - Multistage pressure control variable pump open system - Google Patents
Multistage pressure control variable pump open system Download PDFInfo
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- CN217735874U CN217735874U CN202221675343.4U CN202221675343U CN217735874U CN 217735874 U CN217735874 U CN 217735874U CN 202221675343 U CN202221675343 U CN 202221675343U CN 217735874 U CN217735874 U CN 217735874U
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- valve
- variable pump
- overflow valve
- pump
- open system
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Abstract
The utility model discloses a multistage pressure control's open system of variable pump, including hydraulic tank, variable pump, filter, actuating mechanism, main overflow valve, shuttle valve, orifice, solenoid valve, overflow valve one, hydraulic tank is all connected to the oil inlet and the oil return opening of variable pump, and actuating mechanism is connected to the oil-out, and the control mouth passes through the shuttle valve and connects the solenoid valve, and overflow valve one and orifice are still connected respectively to the solenoid valve, and main overflow valve and actuating mechanism are still connected respectively to the orifice. The variable pump can realize multiple pressure control and meet the pressure requirements of different actuating mechanisms; by adopting the graded constant-voltage control system, the advantage of quick response of the constant-voltage system can be achieved, system heating and energy loss caused by using high voltage when certain low-voltage or medium-voltage actions are executed can be avoided, and the energy-saving effect is achieved; compared with a multi-pump system, the number of pumps is reduced, and the economical efficiency is better.
Description
Technical Field
The utility model relates to the technical field of vehicles, concretely relates to open system of variable pump of multistage pressure control.
Background
For an engineering vehicle or equipment using a hydraulic system as an execution power source, particularly for an engineering vehicle or equipment with multiple execution mechanisms, the execution mechanisms need to act under different pressures of low pressure, medium pressure and high pressure, the requirement of the whole system cannot be met by singly adopting an open variable pump system with a constant pressure function, and the complexity and the cost of the system can be increased by adopting a plurality of open variable pump systems, so that the variable pump system capable of realizing multiple pressure control and meeting the pressure requirements of different execution mechanisms is needed.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a multistage pressure control's open system of variable pump.
In order to achieve the above object, the utility model adopts the following technical scheme:
the variable pump open system comprises a hydraulic oil tank, a variable pump, a filter, an actuating mechanism, a main overflow valve, a shuttle valve, a throttling hole, an electromagnetic valve and an overflow valve I, wherein an oil inlet and an oil return port of the variable pump are both connected with the hydraulic oil tank, an oil outlet is connected with the actuating mechanism, a control port is connected with the electromagnetic valve through the shuttle valve, the electromagnetic valve is also respectively connected with the overflow valve I and the throttling hole, and the throttling hole is also respectively connected with the main overflow valve and the actuating mechanism.
Preferably, a filter is provided between the variable displacement pump and the actuator.
Preferably, the variable displacement pump is a plunger pump having an external control port.
Preferably, the electromagnetic valve is a three-position four-way electromagnetic directional valve.
Preferably, the outlet of the main overflow valve and the outlet of the first overflow valve are both connected with the hydraulic oil tank.
Due to the structure, the beneficial effects of the utility model reside in that:
the hydraulic system is mainly used for the engineering vehicle or equipment using the hydraulic system as the execution power source, is particularly suitable for the engineering vehicle or equipment with multiple execution mechanisms, and has the following advantages:
1. the variable pump can realize various pressure controls and meet the pressure requirements of different actuating mechanisms;
2. by adopting the graded constant-voltage control system, the advantage of quick response of the constant-voltage system can be achieved, system heating and energy loss caused by using high voltage when certain low-voltage or medium-voltage actions are executed can be avoided, and the energy-saving effect is achieved;
3. compared with a multi-pump system, the number of pumps is reduced, and the economical efficiency is better.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the drawings of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides an open system of a multi-stage pressure-controlled variable displacement pump 2, which includes a hydraulic oil tank 1, a variable displacement pump 2, a filter 3, an actuator 4, a main overflow valve 5, a shuttle valve 6, an orifice 7, an electromagnetic valve 8, and an overflow valve one 9.
The oil inlet and the oil return opening of the variable pump 2, the outlet of the main overflow valve 5 and the outlet of the overflow valve I9 are connected with the hydraulic oil tank 1, the oil outlet of the variable pump 2 is connected with the execution mechanism 4 through the filter 3, the control opening of the variable pump 2 is connected with the electromagnetic valve 8 through the shuttle valve 6, the electromagnetic valve 8 is further connected with the overflow valve I9 and the throttling hole 7 respectively, and the throttling hole 7 is further connected with the main overflow valve 5 and the execution mechanism 4 respectively.
In the embodiment, the variable displacement pump 2 is a plunger pump which is provided with an external control port and can output different working pressures according to different control pressures; the filter 3 is a hydraulic element for improving the cleanliness of oil; the shuttle valve 6 is a selector valve and is provided with two inlets, and when the pressure of one inlet is high, the high-pressure port is communicated with the outlet, and the other inlet is simultaneously closed; the throttle hole 7 is a hydraulic element for limiting the flow, and in the scheme, the throttle hole 7 is used for taking a system pressure signal and providing certain buffering; the electromagnetic valve 8 is a three-position four-way electromagnetic reversing valve; the main overflow valve 5 and the first overflow valve 9 are hydraulic elements with pressure capable of being set, in the scheme, the main overflow valve 5 is set to be high pressure and plays roles of limiting system pressure and protecting safety, and the first overflow valve 9 is set to be medium pressure and used for medium pressure action of the system.
The working principle of the structure is as follows:
when the electromagnetic valve 8 is in the middle position, the control port of the pump is connected with the oil tank 1 through the middle position of the electromagnetic valve 8, the control pressure is zero, and the output pressure of the variable pump 2 is the standby pressure of the variable pump 2 at the moment, so that the execution mechanism can execute the action with low pressure 4; when the electromagnet on the right side of the electromagnetic valve 8 is electrified, the control port of the variable pump 2 is connected with the overflow valve I9 through the shuttle valve 6, a medium-pressure signal of the overflow valve I9 is fed back to the variable pump 2, and the variable pump 2 outputs a medium pressure for medium-pressure action of the actuating mechanism 4; when the left electromagnet of the electromagnetic valve 8 is electrified, the control port of the variable pump 2 is connected with the main overflow valve 5 through the shuttle valve 6 and the throttle hole 7, a high-pressure signal of the main overflow valve 5 is fed back to the control port of the variable pump 2, and the variable pump 2 outputs high pressure for high-pressure action of an actuating mechanism.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a multistage pressure control's variable pump open system which characterized in that: the hydraulic oil tank is connected with an oil inlet and an oil return port of the variable pump, the oil outlet is connected with the execution mechanism, a control port is connected with the electromagnetic valve through the shuttle valve, the electromagnetic valve is further respectively connected with the overflow valve I and the throttle hole, and the throttle hole is further respectively connected with the main overflow valve and the execution mechanism.
2. The open system of multi-stage pressure controlled variable displacement pump of claim 1, wherein: and a filter is arranged between the variable pump and the actuating mechanism.
3. The open system of multi-stage pressure controlled variable displacement pump according to claim 1, wherein: the variable pump is a plunger pump with an external control port.
4. The open system of multi-stage pressure controlled variable displacement pump of claim 1, wherein: the electromagnetic valve is a three-position four-way electromagnetic reversing valve.
5. The open system of multi-stage pressure controlled variable displacement pump according to claim 1, wherein: and the outlet of the main overflow valve and the outlet of the first overflow valve are both connected with the hydraulic oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221675343.4U CN217735874U (en) | 2022-06-30 | 2022-06-30 | Multistage pressure control variable pump open system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221675343.4U CN217735874U (en) | 2022-06-30 | 2022-06-30 | Multistage pressure control variable pump open system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217735874U true CN217735874U (en) | 2022-11-04 |
Family
ID=83843648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221675343.4U Active CN217735874U (en) | 2022-06-30 | 2022-06-30 | Multistage pressure control variable pump open system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217735874U (en) |
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2022
- 2022-06-30 CN CN202221675343.4U patent/CN217735874U/en active Active
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