CN216009078U - Valve block for series-parallel switching of three quantitative motors - Google Patents
Valve block for series-parallel switching of three quantitative motors Download PDFInfo
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- CN216009078U CN216009078U CN202122681438.9U CN202122681438U CN216009078U CN 216009078 U CN216009078 U CN 216009078U CN 202122681438 U CN202122681438 U CN 202122681438U CN 216009078 U CN216009078 U CN 216009078U
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Abstract
The utility model discloses a valve block for series-parallel switching of three constant-displacement motors, belonging to the technical field of valve blocks, which flows through a T port B of an electro-hydraulic reversing valve II to flow out of oil through an outlet of a hydraulic manifold block, thereby realizing the parallel connection of the three motors, when the working condition requires that the rotating speed is high and the torque is small, the three motors adopt a series connection mode, the first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve are electrified, the first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve are in a left-hand working state, when oil enters through the inlet of the hydraulic manifold block and flows through the first fixed displacement motor, enters the A port of the first hydraulic reversing valve and flows out through the B port, then enters the third fixed displacement motor, and then the pressure oil enters a T port of the electro-hydraulic reversing valve II and flows out through an A port, enters a quantitative motor II and finally flows out to an outlet of the hydraulic manifold block, so that the series connection of the three motors is realized, and the pressure oil flows in from the outlet of the hydraulic manifold block during reverse rotation.
Description
Technical Field
The utility model relates to a valve block especially relates to a valve block that is used for three ration motor series-parallel connection to switch, belongs to valve block technical field.
Background
The quantitative hydraulic motor that three parallel connection connects among the prior art can export great output torque, but the rotational speed is low, three quantitative hydraulic motor that the series connection connects can export higher rotational speed, but output torque is little, in operating condition, need output torque big rotational speed low and the high operating mode of two kinds of differences of the little rotational speed of moment of torsion, the hydraulic motor who adopts variable displacement usually realizes exporting high-speed low-torque and low-speed high-torque to satisfy the operating mode demand, but variable displacement motor is more expensive, design a valve piece that is used for three quantitative motor series-parallel connection to switch for this reason and solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a valve block for the series-parallel switching of three constant displacement motors, the electro-hydraulic directional valve I and the electro-hydraulic directional valve II work at the right position under the action of a spring under the condition of not being electrified, the two valves work at the left position under the action of an electromagnet and external control pressure oil under the condition of being electrified, the pressure oil required by the electro-hydraulic directional valve I and the electro-hydraulic directional valve II is passed through a shuttle valve, the left and right oil inlets of the shuttle valve are respectively connected with the inlet and the outlet of a hydraulic manifold block, the oil outlet of the shuttle valve is connected with the valve core piston of the electro-hydraulic directional valve I and the electro-hydraulic directional valve II, the valve set successfully solves the source of the external control pilot oil of the electro-hydraulic directional valve I and the electro-hydraulic directional valve by using a thread inserted shuttle valve, when the working condition requires slow rotating speed and large torque, the constant displacement motor I, the constant displacement motor II and the constant displacement motor III adopt the parallel connection mode, when oil enters through an inlet of a hydraulic manifold block, the first path of the oil passes through a first fixed displacement motor, enters an A port of the first electrohydraulic reversing valve through a T port, passes through a T port and a B port of the second electrohydraulic reversing valve, flows out through an outlet of the hydraulic manifold block, enters a second fixed displacement motor through a P port A port of the second electrohydraulic reversing valve, flows out through an outlet of the hydraulic manifold block, enters a third fixed displacement motor through a P port B port of the first electrohydraulic reversing valve, flows through the T port B port of the second electrohydraulic reversing valve to flow out through an outlet of the hydraulic manifold block, realizes the parallel connection of the three motors, and when the working condition requires high rotating speed and low torque, the three motors adopt a series connection mode, the first electrohydraulic reversing valve and the second electrohydraulic reversing valve are electrified, and the first electrohydraulic reversing valve and the second electrohydraulic reversing valve are in a left-position working state, when oil enters through the inlet of the hydraulic manifold block, flows through the first fixed displacement motor, enters the A port of the first electro-hydraulic reversing valve, flows out through the B port, enters the third fixed displacement motor, enters the T port of the second electro-hydraulic reversing valve, flows out through the A port, enters the second fixed displacement motor, and finally flows out through the outlet of the hydraulic manifold block, so that the series connection of the three motors is realized, and pressure oil flows in from the outlet of the hydraulic manifold block during reverse rotation.
The purpose of the utility model can be achieved by adopting the following technical scheme:
a valve block for series-parallel switching of three quantitative motors comprises a hydraulic manifold block, a shuttle valve, an electro-hydraulic reversing valve II, an electro-hydraulic reversing valve I and an oil tank;
the hydraulic manifold block comprises a first electro-hydraulic reversing valve, a second electro-hydraulic reversing valve and a shuttle valve, wherein ports P, T of the first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve are connected with each other, left and right oil inlets of the shuttle valve are respectively connected with ports P, T between the first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve, an oil outlet of the shuttle valve is connected with one ends of valve core pistons of the first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve, and the other ends of the valve core pistons of the first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve are connected with an oil tank, a quantitative motor III, a quantitative motor I and a quantitative motor II.
Preferably, springs are arranged on one side of the first electro-hydraulic reversing valve and one side of the second electro-hydraulic reversing valve.
Preferably, two ends of the second fixed-displacement motor are respectively connected with the A, B port of the second electro-hydraulic reversing valve.
Preferably, the first fixed-displacement motor and the third fixed-displacement motor are also connected with an P, T port between the first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve.
Preferably, an interface A of the first electro-hydraulic reversing valve is connected with a first fixed displacement motor, and an interface B of the first electro-hydraulic reversing valve is connected with a third fixed displacement motor.
The utility model has the advantages of:
the utility model provides a valve block for three quantitative motor series-parallel connection switching, the right position work under the spring action of electricity state electro-hydraulic directional valve one and electro-hydraulic directional valve two under the electricity state of not getting, two valves under the electricity state of electro-hydraulic directional valve one and electro-hydraulic directional valve two under the effect of electro-magnet and external control pressure oil left position work, electro-hydraulic directional valve one and electro-hydraulic directional valve two required pressure fluid are by the shuttle valve, two oil inlets on the left and right sides of shuttle valve are connected with the entry and the export of hydraulic manifold respectively, the oil-out of shuttle valve is connected with the case piston of electro-hydraulic directional valve one and electro-hydraulic directional valve two, this valves application screw thread cartridge shuttle valve has successfully solved the source of the external control pilot oil of electro-hydraulic directional valve one and electro-hydraulic directional valve, when the operating mode requires that the rotational speed is slow, the moment of torsion is big, quantitative motor one, quantitative motor two, quantitative motor three adopts the parallel connection mode, electro-hydraulic directional valve one and electro-hydraulic directional valve two do not get electricity, when oil enters through an inlet of a hydraulic manifold block, the first path of the oil enters through an A port of a first electrohydraulic reversing valve and passes through a T port and a B port of the second electrohydraulic reversing valve through an outlet of the hydraulic manifold block, the second path of the oil enters through an A port of a P port of the second electrohydraulic reversing valve and then flows out through an outlet of the hydraulic manifold block, the third path of the oil enters through a P port B port of the first electrohydraulic reversing valve and then flows into a third electrohydraulic reversing valve, the third path of the oil flows through the T port B port of the second electrohydraulic reversing valve and then flows out through an outlet of the hydraulic manifold block, parallel connection of the three motors is achieved, when the working condition requires high rotating speed and low torque, the three motors adopt a series connection mode, the first electrohydraulic reversing valve and the second electrohydraulic reversing valve are electrified, the first electrohydraulic reversing valve and the second electrohydraulic reversing valve are in a left-position working state, and when the oil flows through an inlet of the hydraulic manifold block and then enters through the first electrohydraulic reversing valve, the A port of the first electrohydraulic reversing valve passes through an A port And the outlet B flows out and then enters a third fixed-displacement motor, then enters a T port of a second electro-hydraulic reversing valve, flows out through the port A, enters a second fixed-displacement motor, and finally flows out to an outlet of the hydraulic manifold block, so that the series connection of the three motors is realized, and pressure oil flows in from the outlet of the hydraulic manifold block during reverse rotation.
Drawings
Fig. 1 is a schematic diagram of a valve block connection for series-parallel switching of three constant displacement motors according to a preferred embodiment of the valve block for series-parallel switching of three constant displacement motors according to the present invention.
In the figure: 1-hydraulic manifold block, 2-first fixed displacement motor, 3-shuttle valve, 4-second fixed displacement motor, 5-second electro-hydraulic reversing valve, 6-first electro-hydraulic reversing valve, 7-third fixed displacement motor, 8-oil tank.
Detailed Description
In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1, the valve block for series-parallel switching of three fixed-displacement motors provided by this embodiment includes a hydraulic manifold 1, a shuttle valve 3, an electro-hydraulic directional valve ii 5, an electro-hydraulic directional valve i 6, and an oil tank 8;
the hydraulic manifold block 1 comprises a first electro-hydraulic reversing valve 6, a second electro-hydraulic reversing valve 5 and a shuttle valve 3, wherein ports P, T of the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5 are connected with each other, left and right oil inlets of the shuttle valve 3 are respectively connected with ports P, T between the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5, an oil outlet of the shuttle valve 3 is connected with one ends of valve core pistons of the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5, the other ends of the valve core pistons of the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5 are connected with an oil tank 8, a third fixed-displacement motor 7, a first fixed-displacement motor 2 and a second fixed-displacement motor 4, springs are arranged on one sides of the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5, two ends of the second fixed-displacement motor 4 are respectively connected with ports A, B of the second electro-hydraulic reversing valve 5, and the first fixed-displacement motor 2 and the third fixed-displacement motor 7 are further connected with a P, a P, a P, a P, a, and a port T, an interface A of the electro-hydraulic reversing valve I6 is connected with a quantitative motor I2, and an interface B of the electro-hydraulic reversing valve I6 is connected with a quantitative motor III 7.
Under the condition of no power supply, the electro-hydraulic reversing valve I6 and the electro-hydraulic reversing valve II 5 work at the right position under the action of a spring;
and when the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5 are in an electrified state, the two valves work in a left position under the action of the electromagnet and external control pressure oil.
The shuttle valve 3 is used for passing oil liquid with pressure required by the electro-hydraulic reversing valve I6 and the electro-hydraulic reversing valve II 5
The left oil inlet and the right oil inlet of the shuttle valve 3 are respectively connected with the inlet and the outlet of the hydraulic manifold 1, the oil outlet of the shuttle valve 3 is connected with the valve core pistons of the electro-hydraulic reversing valve I6 and the electro-hydraulic reversing valve II 5, and the valve group successfully solves the problem of source of externally controlled pilot oil of the electro-hydraulic reversing valve I6 and the electro-hydraulic reversing valve II 5 by using the thread cartridge shuttle valve 3.
When the working condition requires that the rotating speed is slow and the torque is large, the first quantitative motor 2, the second quantitative motor 4 and the third quantitative motor 7 are connected in parallel, the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5 are not electrified, and the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5 are in a right-position working state.
When oil enters through an inlet of the hydraulic manifold block 1, the first path of the oil passes through the first constant velocity motor 2, the oil enters an A port of the first electro-hydraulic reversing valve 6, passes through a T port of the second electro-hydraulic reversing valve 5 through a T port and flows out through an outlet of the hydraulic manifold block 1 through a B port.
And the second path enters a second fixed-displacement motor 4 through a port A of a port P of the electro-hydraulic reversing valve II 5, and then the oil flows out through an outlet of the hydraulic manifold block 1.
The third path enters a third fixed displacement motor 7 through a port B of a port P of the electro-hydraulic reversing valve I6, then flows through a port B of a port T of the electro-hydraulic reversing valve II 5 to the oil liquid and flows out through an outlet of the hydraulic manifold block 1,
the parallel connection of the three motors is realized.
When the working condition requires that the rotating speed is high and the torque is small, the three motors adopt a series connection mode, the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5 are electrified, and the first electro-hydraulic reversing valve 6 and the second electro-hydraulic reversing valve 5 are in a left-position working state.
When oil enters through the inlet of the hydraulic manifold block 1, flows through the first fixed displacement motor 2, then enters the A port of the first electro-hydraulic reversing valve 6, flows out through the B port, then enters the third fixed displacement motor 7, then enters the T port of the second electro-hydraulic reversing valve 5, flows out through the A port, enters the second fixed displacement motor 4, and finally flows out through the outlet of the hydraulic manifold block 1, so that the series connection of the three motors is realized.
As described above, in the case of the normal rotation, the pressure oil flows in from the outlet of the hydraulic manifold 1 in the reverse rotation.
Above, only the further embodiments of the present invention are shown, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can replace or change the technical solution and the concept of the present invention within the protection scope of the present invention.
Claims (5)
1. A valve block for series-parallel switching of three constant volume motors, characterized in that: the hydraulic control system comprises a hydraulic manifold block (1), a shuttle valve (3), an electro-hydraulic reversing valve II (5), an electro-hydraulic reversing valve I (6) and an oil tank (8);
the hydraulic manifold block (1) comprises a first electro-hydraulic reversing valve (6), a second electro-hydraulic reversing valve (5) and a shuttle valve (3), wherein P, T ports of the first electro-hydraulic reversing valve (6) and the second electro-hydraulic reversing valve (5) are connected with each other, a left oil inlet and a right oil inlet of the shuttle valve (3) are respectively connected with P, T ports between the first electro-hydraulic reversing valve (6) and the second electro-hydraulic reversing valve (5), an oil outlet of the shuttle valve (3) is connected with one ends of valve core pistons of the first electro-hydraulic reversing valve (6) and the second electro-hydraulic reversing valve (5), and the other ends of the valve core pistons of the first electro-hydraulic reversing valve (6) and the second electro-hydraulic reversing valve (5) are connected with an oil tank (8), a third fixed displacement motor (7), a first fixed displacement motor (2) and a second fixed displacement motor (4).
2. A valve block for series-parallel switching of three constant-displacement motors according to claim 1, wherein: springs are arranged on one side of the first electro-hydraulic reversing valve (6) and one side of the second electro-hydraulic reversing valve (5).
3. A valve block for series-parallel switching of three constant-displacement motors according to claim 2, wherein: and two ends of the second fixed-displacement motor (4) are respectively connected with the A, B ports of the second electro-hydraulic reversing valve (5).
4. A valve block for series-parallel switching of three constant-displacement motors according to claim 3, wherein: the first fixed-displacement motor (2) and the third fixed-displacement motor (7) are also connected with an P, T port between the first electro-hydraulic reversing valve (6) and the second electro-hydraulic reversing valve (5).
5. A valve block for series-parallel switching of three dosing motors according to claim 4, wherein: the A interface of the electro-hydraulic reversing valve I (6) is connected with the quantitative motor I (2), and the B interface of the electro-hydraulic reversing valve I (6) is connected with the quantitative motor III (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122681438.9U CN216009078U (en) | 2021-11-04 | 2021-11-04 | Valve block for series-parallel switching of three quantitative motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122681438.9U CN216009078U (en) | 2021-11-04 | 2021-11-04 | Valve block for series-parallel switching of three quantitative motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216009078U true CN216009078U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122681438.9U Active CN216009078U (en) | 2021-11-04 | 2021-11-04 | Valve block for series-parallel switching of three quantitative motors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216009078U (en) |
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2021
- 2021-11-04 CN CN202122681438.9U patent/CN216009078U/en active Active
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