CN212360357U - Control system and transport vechicle of pump source - Google Patents
Control system and transport vechicle of pump source Download PDFInfo
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- CN212360357U CN212360357U CN202020940308.5U CN202020940308U CN212360357U CN 212360357 U CN212360357 U CN 212360357U CN 202020940308 U CN202020940308 U CN 202020940308U CN 212360357 U CN212360357 U CN 212360357U
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Abstract
The control system comprises a pump source, a throttle valve, an electro-hydraulic proportional flow control valve, a pressure compensation valve and an inverse proportional overflow valve, wherein an oil inlet of the throttle valve is communicated with the pump source, an oil outlet of the throttle valve is communicated with a P port, and the electro-hydraulic proportional flow control valve is connected with the throttle valve in parallel; the pressure compensation valve is a three-way pressure compensation valve, an oil inlet of the pressure compensation valve is communicated with the pump source, a first oil outlet of the pressure compensation valve is communicated with the port P through a damping plug, and a second oil outlet of the pressure compensation valve is communicated with an oil tank; an oil inlet of the inverse proportion overflow valve is communicated with a first oil outlet of the pressure compensation valve, and an oil outlet of the inverse proportion overflow valve is communicated with the oil tank. Through the scheme, the pressure and the flow of the pump source are subjected to centralized control by adopting the electro-hydraulic proportional element, so that a hydraulic system loop of the transport vehicle is simplified. In addition, the electro-hydraulic proportional element can realize controllable regulation, so that the output flow is stable and is not interfered by a load.
Description
Technical Field
The application relates to the field of transport vehicles, in particular to a control system of a pump source.
Background
With the continuous development of the technical field of transportation vehicles, such as sanitation vehicles and the like, after the basic functional requirements of the transportation vehicles are met, more requirements are continuously provided for a pump source of a vehicle hydraulic system, the basic requirements of pressure and flow of different execution mechanisms are met, and the reliability, the economy, the energy conservation and the environmental protection are considered.
In the existing hydraulic system, in order to meet the working performance requirements of different actuators, overflow valves are required to be arranged in each loop to limit the working pressure; meanwhile, throttle valves are required to be arranged in each loop for controlling different flow requirements of the actuator; the number and the types of the valve elements are increased along with the increase of the number and the types of the actuating mechanisms, and the problems that the number of the valve elements needing to be adjusted is large, the valve elements are not easy to arrange on a vehicle, the maintenance is difficult and the like generally exist. And the form of controlling the flow by adopting the throttle valve is easily influenced by the load, so that the actuating mechanism has different actions and poor control precision.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the existing pump source control system, the present application provides a pump source control system, which can simplify the system loop, make the output flow of the pump source continuously adjustable, and the output flow is stable and not interfered by the load.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
a control system of a pump source comprises a pump source, a throttle valve, an electro-hydraulic proportional flow control valve, a pressure compensation valve and an anti-proportional overflow valve, wherein an oil inlet of the throttle valve is communicated with the pump source, an oil outlet of the throttle valve is communicated with a port P, an oil inlet of the electro-hydraulic proportional flow control valve is communicated with the pump source, and an oil outlet of the electro-hydraulic proportional flow control valve is communicated with the port P; the pressure compensation valve is a three-way pressure compensation valve, an oil inlet of the pressure compensation valve is communicated with the pump source, a first oil outlet of the pressure compensation valve is communicated with the port P through a damping plug, and a second oil outlet of the pressure compensation valve is communicated with an oil tank; an oil inlet of the inverse proportion overflow valve is communicated with a first oil outlet of the pressure compensation valve, an oil outlet of the inverse proportion overflow valve is communicated with the oil tank, and the P port is a loaded oil inlet.
Preferably, the system further comprises a valve block, and the throttle valve, the electro-hydraulic proportional flow control valve, the pressure compensation valve and the inverse proportional overflow valve are inserted into the valve block through threads.
A transport vehicle is provided with the control system of the pump source.
The application has the advantages that: the application provides a control system of a pump source, which comprises the pump source, a throttle valve, an electro-hydraulic proportional flow control valve, a pressure compensation valve and an inverse proportional overflow valve, wherein an oil inlet of the throttle valve is communicated with the pump source, an oil outlet of the throttle valve is communicated with a port P, an oil inlet of the electro-hydraulic proportional flow control valve is communicated with the pump source, and an oil outlet of the electro-hydraulic proportional flow control valve is communicated with the port P; the pressure compensation valve is a three-way pressure compensation valve, an oil inlet of the pressure compensation valve is communicated with the pump source, a first oil outlet of the pressure compensation valve is communicated with the port P through a damping plug, and a second oil outlet of the pressure compensation valve is communicated with an oil tank; an oil inlet of the inverse proportion overflow valve is communicated with a first oil outlet of the pressure compensation valve, and an oil outlet of the inverse proportion overflow valve is communicated with the oil tank. Through the scheme, the pressure and the flow of the pump source are subjected to centralized control by adopting the electro-hydraulic proportional element, so that a hydraulic system loop of the transport vehicle is simplified. In addition, the electro-hydraulic proportional element can realize controllable regulation, so that the output flow is stable and is not interfered by a load.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a hydraulic schematic diagram of a control system of a pump source according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, a control system of a pump source comprises a pump source 1, a throttle valve 2, an electro-hydraulic proportional flow control valve 3, a pressure compensation valve 4 and an inverse proportional overflow valve 5, wherein an oil inlet of the throttle valve 2 is communicated with the pump source 1, an oil outlet of the throttle valve 2 is communicated with a port P, an oil inlet of the electro-hydraulic proportional flow control valve 3 is communicated with the pump source 1, and an oil outlet of the electro-hydraulic proportional flow control valve 3 is communicated with the port P; the pressure compensation valve 4 is a three-way pressure compensation valve 4, an oil inlet of the pressure compensation valve is communicated with the pump source 1, a first oil outlet of the pressure compensation valve is communicated with a port P through a damping plug 6, and a second oil outlet of the pressure compensation valve is communicated with an oil tank; an oil inlet of the inverse proportion overflow valve 5 is communicated with a first oil outlet of the pressure compensation valve 4, an oil outlet of the inverse proportion overflow valve 5 is communicated with the oil tank, and the port P is a loaded oil inlet.
The control loop of flow and pressure is arranged on the pump source 1, and the electro-hydraulic proportional flow control valve 3 is connected with the throttle valve 2 in parallel and used for controlling the output flow of the pump source 1; the pressure compensation valve 4 is adopted to stabilize the pressure difference between two ends of an oil inlet and an oil outlet of the electro-hydraulic proportional flow control valve 3 and the throttle valve 2, so that the output flow is not interfered by load; and the inverse proportion overflow valve 5 is adopted to control the pilot pressure of the pressure compensation valve 4, so as to control the output pressure of the pump source 1.
The pressure and flow parameters of the pump source 1 are centrally controlled by the electro-hydraulic proportional element, a hydraulic system loop of the transport vehicle is simplified, the electro-hydraulic proportional element can be controllably adjusted, the output flow of the pump source is continuously adjustable, on one hand, the output flow is stable and is not interfered by a load, on the other hand, the output parameters of the pump source 1 can change along with the load under the condition of meeting the flow control requirement, and certain energy conservation is achieved. In addition, when an electrical system for the electro-hydraulic proportional flow valve fails, the loop can ensure the output of a high-pressure low-flow state, and the emergency operation of a vehicle is ensured.
In some embodiments of the present application, the control system of the pump source 1 further includes a valve block, and the throttle valve 2, the electro-hydraulic proportional flow control valve 3, the pressure compensation valve 4 and the inverse proportional relief valve 5 are inserted into the valve block through threads. The required hydraulic valve is integrated into the valve block in a threaded plug-in mounting mode, so that a hydraulic pipeline needing to be connected is simplified.
The application also provides a transport vehicle, which is provided with the control system of the pump source.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (3)
1. A control system of a pump source comprises the pump source and is characterized by further comprising a throttle valve, an electro-hydraulic proportional flow control valve, a pressure compensation valve and an inverse proportional overflow valve, wherein an oil inlet of the throttle valve is communicated with the pump source, an oil outlet of the throttle valve is communicated with a port P, an oil inlet of the electro-hydraulic proportional flow control valve is communicated with the pump source, and an oil outlet of the electro-hydraulic proportional flow control valve is communicated with the port P; the pressure compensation valve is a three-way pressure compensation valve, an oil inlet of the pressure compensation valve is communicated with the pump source, a first oil outlet of the pressure compensation valve is communicated with the port P through a damping plug, and a second oil outlet of the pressure compensation valve is communicated with an oil tank; an oil inlet of the inverse proportion overflow valve is communicated with a first oil outlet of the pressure compensation valve, an oil outlet of the inverse proportion overflow valve is communicated with the oil tank, and the P port is a loaded oil inlet.
2. The control system of a pump source according to claim 1, further comprising a valve block into which the throttle valve, the electro-hydraulic proportional flow control valve, the pressure compensating valve, and the inverse proportional relief valve are threadedly inserted.
3. A transport vehicle, characterized in that the transport vehicle is provided with a control system for a pump source according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020940308.5U CN212360357U (en) | 2020-05-28 | 2020-05-28 | Control system and transport vechicle of pump source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020940308.5U CN212360357U (en) | 2020-05-28 | 2020-05-28 | Control system and transport vechicle of pump source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212360357U true CN212360357U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020940308.5U Active CN212360357U (en) | 2020-05-28 | 2020-05-28 | Control system and transport vechicle of pump source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212360357U (en) |
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2020
- 2020-05-28 CN CN202020940308.5U patent/CN212360357U/en active Active
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