CN210126553U - Independent hydraulic steering priority valve for agricultural machinery of engineering machinery - Google Patents
Independent hydraulic steering priority valve for agricultural machinery of engineering machinery Download PDFInfo
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- CN210126553U CN210126553U CN201920815181.1U CN201920815181U CN210126553U CN 210126553 U CN210126553 U CN 210126553U CN 201920815181 U CN201920815181 U CN 201920815181U CN 210126553 U CN210126553 U CN 210126553U
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- valve
- steering
- hydraulic
- steering gear
- oil
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Abstract
The utility model discloses an engineering machine tool is independent hydraulic pressure steering priority valve for agricultural machine relates to hydraulic pressure and is steering power's engineering machine tool and agricultural machine technical field, and it includes the overflow valve, the overflow valve passes through the left surface of Eton screw thread cartridge at the valve block, the right flank of valve block has the hydraulic control cartridge valve through Eton screw thread cartridge. The independent hydraulic steering priority valve for the engineering machinery agricultural machinery adopts the modularized combination of the Eton hydraulic cartridge valves, when a steering gear works, an oil inlet of the steering gear is connected with a steering oil cylinder through the steering gear, oil coming from a steering pump enters the steering oil cylinder to enable the loader to steer, a pressure signal of a control port of the steering gear acts on the left end of a valve core through a small throttling hole, the pressure at the right end of the valve core is lower than that at an outlet of the steering gear, due to the change of differential pressure at the left end and the right end of the valve core and the action of a spring, when the rotating speed of the steering gear is very high, the valve core is enabled to move rightwards to be closed, hydraulic oil is preferentially supplied.
Description
Technical Field
The utility model relates to a hydraulic pressure is for steering power's engineering machine tool and agricultural machine technical field, specifically is an engineering machine tool is independent hydraulic pressure turns to priority valve for agricultural machine tool.
Background
The hydraulic steering priority valve is an important component part playing a role in energy conservation in a full hydraulic steering system, and pressure oil of a steering hydraulic pump is distributed to an auxiliary hydraulic loop under the working condition of no steering; during steering, pressure oil can be preferentially distributed to the steering gear; when the steering is at the end point, the residual pressure is transferred to the overflow valve to reduce the pressure, and the reversing valve distributes the pressure oil to the auxiliary loop under the action of the pressure.
At present, hydraulic steering systems at home and abroad are more in variety and can be roughly divided into three types, namely a power-assisted steering system, a load sensing full-hydraulic steering device, a priority valve steering system and a flow amplification steering system, the load sensing full-hydraulic steering device and the priority valve steering system are widely applied to engineering machinery and agricultural machinery, but most of the existing hydraulic steering priority valves adopt an integrated structure, so that the failure rate is higher, the maintenance cost is higher due to the integrated structure, and the hydraulic steering system is likely to need to be integrally replaced during maintenance.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides an engineering machine tool is independent hydraulic pressure turns to priority valve for agricultural machine has solved current hydraulic pressure and has turned to priority valve majority and adopt the integral structure, leads to its fault rate higher like this, and the integral structure form brings the maintenance cost higher, probably needs whole problem of changing when the maintenance.
(II) technical scheme
In order to achieve the above purpose, the utility model adopts the technical proposal that: an independent hydraulic steering priority valve for engineering machinery agricultural machinery comprises an overflow valve, wherein the overflow valve is inserted in the left side surface of a valve block through an Eton thread, a hydraulic control cartridge valve is inserted in the right side surface of the valve block through the Eton thread, a safety valve oil return port is formed in the left side of the upper surface of the valve block and communicated with the upper surface of the overflow valve, a multi-way valve oil inlet of a working system is formed in the upper surface of the valve block and communicated with the left side of the upper surface of the hydraulic control cartridge valve, a steering gear oil inlet is formed in the right side of the upper surface of the valve block and communicated with the right side of the upper surface of the hydraulic control cartridge valve, a steering gear control port is formed in the left side of the lower surface of the valve block and communicated with the right side of the lower surface of the overflow valve block, and a steering pump oil inlet is formed in the right side of the, and the oil inlet of the steering pump is communicated with the right side of the lower surface of the hydraulic control cartridge valve.
Preferably, the oil inlet of the multi-way valve of the working system is positioned on the right side of the oil return opening of the safety valve.
Preferably, the oil inlet of the steering gear is positioned on the right side of the oil return opening of the safety valve.
Preferably, the hydraulic control cartridge valve comprises a steering safety valve, a spring, a valve core and a valve body.
(III) advantageous effects
The beneficial effects of the utility model reside in that:
1. the independent hydraulic steering priority valve for the engineering machinery agricultural machinery adopts the modularized combination of the Eton hydraulic cartridge valves, when a steering gear works, an oil inlet of the steering gear is connected with a steering oil cylinder through the steering gear, oil coming from a steering pump enters the steering oil cylinder to enable the loader to steer, a pressure signal of a control port of the steering gear acts on the left end of a valve core through a small throttling hole, the pressure at the right end of the valve core is lower than that at an outlet of the steering gear, due to the change of differential pressure at the left end and the right end of the valve core and the action of a spring, when the rotating speed of the steering gear is very high, the valve core is enabled to move rightwards to be closed, hydraulic oil is preferentially supplied.
2. This independent hydraulic pressure turns to priority valve for engineering machine tool agricultural machine through using forged valve piece, can reduction in production cost, can reduce the maintenance cost simultaneously.
Drawings
Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;
fig. 2 is a schematic diagram of the circuit connection structure of the present invention.
In the figure: the hydraulic control system comprises an overflow valve 1, a hydraulic control cartridge valve 2, a valve block 3, a safety valve oil return port 4, a multi-way valve oil inlet of a working system 5, a steering gear oil inlet 6, a steering gear control port 7 and a steering pump oil inlet 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2, the utility model provides a technical solution: an independent hydraulic steering priority valve for engineering machinery agricultural machinery comprises an overflow valve 1, wherein the overflow valve 1 is arranged, the overflow valve 1 realizes the high-pressure unloading function of a loop system to protect a steering loop, the overflow valve 1 is inserted in the left side surface of a valve block 3 through Eton threads, the production cost can be reduced and the maintenance cost can be reduced by forging the valve block 3, a hydraulic control cartridge valve 2 is inserted in the right side surface of the valve block 3 through the Eton threads, the hydraulic control cartridge valve 2 realizes the steering priority switching function under the steering pump oil confluence and steering work under the load sensitivity by arranging the hydraulic control cartridge valve 2, the hydraulic control cartridge valve 2 comprises a steering safety valve, a spring, a valve core and a valve body, when a steering device works, a steering device oil inlet 6 is connected with the steering cylinder through a steering device, the oil from the steering pump enters the steering cylinder to steer the loading machine, at the moment, a pressure signal of a control port 7 of the steering gear acts on the left end of the valve core through a small throttling hole, the pressure at the right end of the valve core is lower than the pressure at an outlet of the steering gear, the valve core moves rightwards to be closed when the steering gear rotates at a high speed due to the change of the pressure difference between the left end and the right end of the valve core and the action of a spring, hydraulic oil is preferentially supplied and steered, so that the steering priority purpose is realized, a safety valve oil return port 4 is formed in the left side of the upper surface of the valve block 3, the safety valve oil return port 4 is communicated with the upper surface of the overflow valve 1, a multi-way valve oil inlet 5 of a working system is formed in the upper surface of the valve block 3, the multi-way valve oil inlet 5 of the working system is positioned on the right side of the safety valve oil return port 4, the multi-way valve oil inlet 5 of the working system is communicated with the left, the steering gear oil inlet 6 is located on the right side of the safety valve oil return opening 4, the steering gear control opening 7 is formed in the left side of the lower surface of the valve block 3, the steering gear control opening is communicated with the right side of the lower surface of the overflow valve 1, the steering pump oil inlet 8 is formed in the right side of the lower surface of the valve block 3, and the steering pump oil inlet 8 is communicated with the right side of the lower surface of the hydraulic control cartridge valve 2.
The utility model discloses an operating procedure does:
when the steering pump oil return port is used, the port P is an oil inlet 8 of a steering pump, the port CF is connected with an oil inlet 6 of a steering gear, the port EF is connected with an oil inlet 5 of a multi-way valve of a working system, the port LS is connected with a control port 7 of the steering gear, and the port T is a safety valve oil return port 4;
when oil enters the P port, hydraulic oil is preferentially supplied to the CF port through the valve core;
when the steering gear does not work, the CF port is in a closed state, the pressure of the LS port is zero at the moment, oil enters the right end of the valve core, hydraulic pressure acts on the right end of the valve core, the pre-pressure of the spring is overcome, the valve core moves leftwards, the P port is communicated with the EF port at the moment, and steering pump oil is converged into a working system, so that double-pump confluence is realized;
when the steering gear works, the CF port is connected with the steering oil cylinder through the steering gear, and oil from the steering pump enters the steering oil cylinder to steer the loader; the pressure signal of the LS port acts on the left end of the valve core through the small throttling hole, the pressure at the right end of the valve core is lower than the pressure at the outlet of the steering gear, and due to the change of the pressure difference between the left end and the right end of the valve core and the action of the spring, when the rotating speed of the steering gear is large, the valve core moves rightwards to be closed, and hydraulic oil is preferentially supplied for steering;
when the steering load exceeds a rated value, the pressure oil at the LS port enables the steering safety valve to be opened, the pressure of the LS port is relieved, the valve core moves leftwards, and the oil from the steering pump flows into a working system;
when the working system is not working, the neutral position in the multi-way valve is unloaded.
The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. The utility model provides an engineering machine tool agricultural machine is with independent hydraulic pressure priority valve that turns to, includes overflow valve (1), its characterized in that: the hydraulic control overflow valve is characterized in that the overflow valve (1) is inserted in the left side face of the valve block (3) through an Eton thread, a hydraulic control cartridge valve (2) is inserted in the right side face of the valve block (3) through the Eton thread, a safety valve oil return port (4) is formed in the left side of the upper surface of the valve block (3), the safety valve oil return port (4) is communicated with the upper surface of the overflow valve (1), a multi-way valve oil inlet (5) of a working system is formed in the upper surface of the valve block (3), the oil inlet (5) of the working system is communicated with the left side of the upper surface of the hydraulic control cartridge valve (2), a steering gear oil inlet (6) is formed in the right side of the upper surface of the valve block (3), the steering gear oil inlet (6) is communicated with the right side of the upper surface of the hydraulic control cartridge valve (2), a steering gear control port (7) is formed in the left side of the lower surface of, the right side of the lower surface of the valve block (3) is provided with a steering pump oil inlet (8), and the steering pump oil inlet (8) is communicated with the right side of the lower surface of the hydraulic control cartridge valve (2).
2. The independent hydraulic steering priority valve for the agricultural machine of the construction machine according to claim 1, wherein: and an oil inlet (5) of the multi-way valve of the working system is positioned on the right side of the oil return port (4) of the safety valve.
3. The independent hydraulic steering priority valve for the agricultural machine of the construction machine according to claim 1, wherein: and the oil inlet (6) of the steering gear is positioned on the right side of the oil return port (4) of the safety valve.
4. The independent hydraulic steering priority valve for the agricultural machine of the construction machine according to claim 1, wherein: the hydraulic control cartridge valve (2) comprises a steering safety valve, a spring, a valve core and a valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920815181.1U CN210126553U (en) | 2019-05-31 | 2019-05-31 | Independent hydraulic steering priority valve for agricultural machinery of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920815181.1U CN210126553U (en) | 2019-05-31 | 2019-05-31 | Independent hydraulic steering priority valve for agricultural machinery of engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210126553U true CN210126553U (en) | 2020-03-06 |
Family
ID=69663783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920815181.1U Expired - Fee Related CN210126553U (en) | 2019-05-31 | 2019-05-31 | Independent hydraulic steering priority valve for agricultural machinery of engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210126553U (en) |
-
2019
- 2019-05-31 CN CN201920815181.1U patent/CN210126553U/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 |
Granted publication date: 20200306 |
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| CF01 | Termination of patent right due to non-payment of annual fee |