CN218062859U - Double-pump confluence hydraulic system of aerial work platform - Google Patents
Double-pump confluence hydraulic system of aerial work platform Download PDFInfo
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- CN218062859U CN218062859U CN202222205192.2U CN202222205192U CN218062859U CN 218062859 U CN218062859 U CN 218062859U CN 202222205192 U CN202222205192 U CN 202222205192U CN 218062859 U CN218062859 U CN 218062859U
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Abstract
The utility model relates to a high altitude construction car double pump confluence hydraulic system, including big pump, check valve I, high pressure oil filter I, high altitude construction one oil feed way, proportional valve, high altitude construction two oil feed ways, check valve II, flow-combining valve, high pressure oil filter II, little pump, big pump is connected with check valve I, check valve I is connected with high pressure oil filter I, high pressure oil filter I is connected with high altitude construction one oil feed way, high altitude construction one oil feed way is connected with proportional valve, little pump is connected with high pressure oil filter II, big pump, little pump all are connected with the oil tank, characterized by: the high-pressure oil filter II is connected with the flow converging valve, an A port of the flow converging valve is connected with a second aerial work oil supply path, a B port of the flow converging valve is connected with a second one-way valve, and the second one-way valve is connected with the first aerial work oil supply path. The hydraulic oil circuit has the advantages of simple structure, low operation cost, energy conservation, emission reduction, noise reduction and obvious hydraulic oil circuit heat dissipation effect.
Description
Technical Field
The application relates to a double-pump confluence hydraulic system of an overhead working truck, which is mainly suitable for energy conservation, emission reduction and noise reduction of the overhead working truck.
Background
The high-altitude operation vehicle in the prior art sometimes needs to switch between large flow and small flow of a hydraulic system aiming at different application occasions and actual needs, and is usually realized by changing the rotating speed of an engine at the moment, and the rotating speed of the engine is relatively high in large flow, so that the energy loss is relatively large, the carbon dioxide emission is large, and the noise is large.
Disclosure of Invention
The technical problem solved by the application is to overcome the defects in the prior art, and provide the double-pump confluence hydraulic system of the overhead working truck, which has the advantages of simple structure, low operation cost, energy conservation, emission reduction and noise reduction, and realizes large-flow action through double-pump confluence by using double pumps used by the system per se without increasing the rotating speed of an engine.
The technical scheme adopted by the application for solving the technical problems is as follows: the utility model provides an aerial working car double-pump confluence hydraulic system, includes big pump, check valve one, high-pressure oil filter one, aerial working one oil feed way, proportional valve, aerial working two oil feed ways, check valve two, the confluence valve, high-pressure oil filter two, little pump, big pump is connected with check valve one, check valve one is connected with high-pressure oil filter one, high-pressure oil filter one is connected with aerial working one oil feed way, aerial working one oil feed way is connected with proportional valve, little pump is connected with high-pressure oil filter two, big pump, little pump all are connected with the oil tank, its structural feature is: the high-pressure oil filter II is connected with the flow converging valve, an A port of the flow converging valve is connected with a second aerial work oil supply path, a B port of the flow converging valve is connected with a second one-way valve, and the second one-way valve is connected with the first aerial work oil supply path. When the confluence valve is not electrified, the large pump and the small pump respectively provide hydraulic power for respective aerial work parts, and the hydraulic power and the aerial work parts are not interfered with each other; when the high-altitude operation where the proportional valve is located needs a large flow, the flow-combining valve is electrified, and the flow of the small pump is converged into the high-altitude operation, so that the high-altitude operation oil way obtains a large flow.
According to the method and the device, the flow of the proportional valve of the hydraulic system from the flow of the large pump to the flow of the small pump is regulated and controlled as required through the combined oil supply of the large pump and the small pump, and the flow is not required to be regulated and controlled by changing the rotating speed of the engine. When the proportional valve of the overhead working truck needs hydraulic oil with a not very large flow, the controller of the overhead working truck controls the small pump related oil supply system to operate without participating in the large pump related oil supply system; when the proportional valve of the overhead working truck needs hydraulic oil with larger flow and the rotating speed is increased to bring great noise and oil consumption, the controller of the overhead working truck controls the hydraulic oil of the small pump to be merged into the oil supply system related to the large pump under the condition of not increasing the rotating speed of the engine, and the oil supply is carried out after the adjustment of the proportional valve, so that the large-scale expansion of the adjusting range of the proportional valve of the overhead working truck is realized, and the design purposes of energy conservation, emission reduction and noise reduction are achieved.
The total oil return path of the double-pump confluence hydraulic system of the overhead working truck is communicated to an oil tank through a cooler, so that the oil temperature is not easy to rise.
Compared with the prior art, the application has the following advantages and effects: the hydraulic oil circuit has the advantages of simple structure, low operation cost, energy conservation, emission reduction, noise reduction and obvious hydraulic oil circuit heat dissipation effect.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
In fig. 1: 1 is a large pump, 2 is a one-way valve I, 3 is a high-pressure oil filter I, 4 is a high-altitude operation one-oil supply way, 5 is a proportional valve, 6 is a high-altitude operation two-oil supply way, 7 is a total oil return way, 8 is a one-way valve II, 9 is a flow-converging valve, 10 is a high-pressure oil filter II, 11 is a small pump, 12 is a cooler, and 13 is an oil tank.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples.
Referring to fig. 1, the double-pump confluence hydraulic system of the aerial working truck in the embodiment of the application comprises a large pump 1, a one-way valve I2, a high-pressure oil filter I3, an aerial working I oil supply path 4, a proportional valve 5, an aerial working II oil supply path 6, a one-way valve II 8, a confluence valve 9, a high-pressure oil filter II 10 and a small pump 11, wherein the large pump 1 is connected with the one-way valve I2, the one-way valve I2 is connected with the high-pressure oil filter I3, the high-pressure oil filter I3 is connected with the aerial working I oil supply path 4, the aerial working I oil supply path 4 is connected with the proportional valve 5, and the small pump 11 is connected with the high-pressure oil filter II 10, and is structurally characterized in that: the high-pressure oil filter is characterized by further comprising a second check valve 8 and a flow converging valve 9, a second high-pressure oil filter 10 is connected with the flow converging valve 9, an A port of the flow converging valve 9 is connected with a second aerial work oil supply path 6, a B port of the flow converging valve 9 is connected with the second check valve 8, and the second check valve 8 is connected with a first aerial work oil supply path 4. When the proportional valve 5 needs a small flow, the aerial work vehicle controller controls the flow-converging valve 9 not to be electrified, the small pump 11 hydraulic oil enters the aerial work secondary oil supply passage 6 through the opening A of the flow-converging valve 9, and the large pump 1 independently supplies hydraulic oil to the proportional valve 5. When the proportional valve 5 needs a large flow, the aerial work vehicle controller controls the flow-combining valve 9 to be electrified, the hydraulic oil of the small pump 11 is converged into the aerial work first oil supply path 4 through the port B of the flow-combining valve 9 and the check valve II 8, and the large-flow hydraulic oil is provided for the proportional valve 5. The whole vehicle oil return is in the prior art, and returns to the oil tank 13 from the main oil return path 7 and the cooler 12 to cool the whole vehicle hydraulic oil.
According to the method and the device, the combined oil supply of the large pump 1 and the small pump 11 is adopted, the flow of the proportional valve 5 of the hydraulic system from the flow of the large pump 1 to the flow of the small pump 11 can be regulated as required, and the flow can be regulated without changing the rotating speed of an engine. When the proportional valve 5 of the aerial work vehicle needs hydraulic oil with a not very large flow, the aerial work vehicle controller controls the relative oil supply system of the small pump 11 (comprising the small pump 11, the second high-pressure oil filter 10, the port A of the confluence valve 9 and the second aerial work oil supply line 6) to do self-service work without participating in the relative oil supply system of the large pump (comprising the large pump 1, the first one-way valve 2, the first high-pressure oil filter 3, the first aerial work oil supply line 4 and the proportional valve 5); when the proportional valve 5 of the aerial work vehicle needs hydraulic oil with a larger flow and the rotating speed is increased to bring great noise and oil consumption, the aerial work vehicle controller controls the flow converging valve 9 to be electrified and switched to the oil circuit B under the condition that the rotating speed of the engine is not increased, at the moment, hydraulic oil of the small pump 11 is merged into a related oil supply system of the large pump 1 through the high-pressure oil filter II 10, the port B of the flow converging valve 9 and the one-way valve II 8, the regulation and control range of the proportional valve 5 of the aerial work vehicle is greatly expanded on the premise that the rotating speed of the engine is not increased, and the design purposes of saving energy, reducing emission and reducing noise are achieved.
The aerial work vehicle controller is in the prior art, a control computer or a PLC can be adopted, and the aerial work vehicle controller is connected with the proportional valve 5 and the flow converging valve 9 and controls the operations of the proportional valve and the flow converging valve. The prior art is that the proportional valve 5 reaches the related oil cylinder and then reaches the main oil return path 7, and the prior art is that the aerial work secondary oil supply path 6 reaches the related oil cylinder and then reaches the main oil return path 7.
The above description is within the reach of a person skilled in the art.
The above described in this specification is only illustrative of the present patent; moreover, the patented parts may be named differently, and all equivalent or simple changes in structure, features and principles that are described in this patent are intended to be covered by the scope of protection of this patent.
Claims (2)
1. A double-pump confluence hydraulic system of an aerial work vehicle comprises a big pump, a first one-way valve, a first high-pressure oil filter, a first aerial work oil supply path, a proportional valve, a second aerial work oil supply path, a second one-way valve, a confluence valve, a second high-pressure oil filter and a small pump, wherein the big pump is connected with the first one-way valve, the first one-way valve is connected with the first high-pressure oil filter, the first high-pressure oil filter is connected with the first aerial work oil supply path, the first aerial work oil supply path is connected with the proportional valve, the small pump is connected with the second high-pressure oil filter, and the big pump and the small pump are both connected with an oil tank, and the double-pump confluence hydraulic system is characterized in that: the high-pressure oil filter II is connected with the flow converging valve, an A port of the flow converging valve is connected with a second aerial work oil supply path, a B port of the flow converging valve is connected with a second one-way valve, and the second one-way valve is connected with the first aerial work oil supply path.
2. The overhead working truck double-pump confluence hydraulic system as claimed in claim 1, wherein: and a main oil return path of the double-pump confluence hydraulic system of the overhead working truck is communicated to an oil tank through a cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222205192.2U CN218062859U (en) | 2022-08-22 | 2022-08-22 | Double-pump confluence hydraulic system of aerial work platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222205192.2U CN218062859U (en) | 2022-08-22 | 2022-08-22 | Double-pump confluence hydraulic system of aerial work platform |
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| Publication Number | Publication Date |
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| CN218062859U true CN218062859U (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222205192.2U Active CN218062859U (en) | 2022-08-22 | 2022-08-22 | Double-pump confluence hydraulic system of aerial work platform |
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| CN (1) | CN218062859U (en) |
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2022
- 2022-08-22 CN CN202222205192.2U patent/CN218062859U/en active Active
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