CN217207064U

CN217207064U - Zero-leakage bidirectional pump hydraulic system

Info

Publication number: CN217207064U
Application number: CN202220444377.6U
Authority: CN
Inventors: 黄康军; 李彬
Original assignee: Zhongshan Rotontek Machinery Co ltd
Current assignee: Zhongshan Rotontek Machinery Co ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-08-16
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses a zero leaks two-way pump hydraulic system, be provided with two-way gear pump in the oil tank, two-way gear pump links to each other with a two steering motor, install integrated oil circuit valve piece between two steering motor and two-way gear pump, be provided with two-way hydraulic pressure lock in the integrated oil circuit valve piece, two end caps that two-way hydraulic pressure lock set up including the symmetry, install the check valve in the end cap, be provided with the pilot operated piston that can follow the horizontal direction removal and promote the end cap in the middle of two end caps, install the spring between pilot operated piston and two end caps, be provided with the check valve in the end cap, still be provided with the oil circuit passageway that is used for communicateing pilot operated piston and oil tank in the integrated oil circuit valve piece. The system is stable, has zero leakage, the reversing success rate is close to 100 percent, no back pressure exists during retraction, the efficiency is improved by 10 percent compared with the traditional mode, the cost is reduced by 20 percent, and the system can be operated by an electric tool in the absence of electricity and is widely applied in practice.

Description

Zero-leakage bidirectional pump hydraulic system

Technical Field

The utility model relates to a hydraulic system especially relates to a zero leaks two-way pump hydraulic system.

Background

The double-acting oil cylinder in the prior art usually adopts a bidirectional hydraulic lock to maintain pressure, so that the oil cylinder can be stopped at any position and can be kept stationary for a long time, but if a bidirectional pump hydraulic system is not properly designed in an oil way, a hydraulic control piston and a one-way valve, a lot of adverse effects can be generated, such as inflexible reversing, large back pressure generated during retraction, poor pressure maintaining effect and the like, can not meet the requirements of people.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a zero leaks two-way pump hydraulic system, turns to (just, reversal) through the motor and realizes stretching out, withdrawal switching of oil circuit, solves the shortcoming regret that prior art exists.

The utility model provides a following scheme:

the utility model provides a zero leaks two-way pump hydraulic system, includes an oil tank be provided with the two-way gear pump that is used for extracting fluid in the oil tank, two-way gear pump links to each other with a two steering motor through a connecting axle, its characterized in that two steering motor with install integrated oil circuit valve piece between the two-way gear pump, be provided with two-way hydraulic pressure lock in the integrated oil circuit valve piece, two-way hydraulic pressure lock is including two end caps that the symmetry set up install the check valve in the end cap, be provided with one in the middle of two end caps and follow the hydraulic control piston that the horizontal direction removed and promote the end cap, install the spring between hydraulic control piston and two end caps be provided with the check valve in the end cap, still be provided with the oil circuit way that is used for communicateing hydraulic control piston and oil tank in the integrated oil circuit valve piece.

Furthermore, the oil path channels comprise a first oil path channel, a second oil path channel, a third oil path channel, a fourth oil path channel and a fifth oil path channel, the bidirectional hydraulic lock comprises an upper half body and a lower half body, the plugs are installed between the upper half body and the lower half body, the fifth oil path channel is arranged on a central axis of the lower half body, the first oil path channel and the second oil path channel are arranged on the lower half body and symmetrically distributed along the central axis, and the third oil path channel and the fourth oil path channel are symmetrically arranged on the upper half body and symmetrically distributed along the central axis.

Furthermore, an O-shaped sealing ring is arranged on the outer surface of the hydraulic control piston.

Furthermore, the bidirectional gear pump further comprises an overflow valve and an oil return pipe, wherein the overflow valve and the oil return pipe are connected with the bidirectional gear pump through the connecting shaft.

Further, an oil inlet filter is installed on an oil suction pipe of the gear pump.

Furthermore, a motor shaft at the rear end of the double-steering motor is provided with a 6.35mm hexagonal groove.

Furthermore, an oil return hole is formed in the rodless cavity end of the hydraulic control piston.

Furthermore, the integrated oil circuit valve block is formed by vacuum die casting.

Compared with the prior art, the utility model has the following advantages: the system is stable, has zero leakage, the reversing success rate is close to 100 percent, no back pressure exists during retraction, the efficiency is improved by 10 percent compared with the traditional mode, the cost is reduced by 20 percent, and the system can be operated by an electric tool in the absence of electricity and is widely applied in practice.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a sectional view of the present invention.

Fig. 2 is a sectional view taken along line B-B of fig. 1.

Fig. 3 is a cross-sectional view of the bulkhead.

Fig. 4 is a cross-sectional view of the check valve.

Fig. 5 is an oil circuit diagram of the hydraulic system of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments 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 work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Description of the reference numerals: oil tank 1, oil inlet filter 2, bidirectional gear pump 3, connecting shaft 4, double-steering motor 5, motor housing 51, motor cover 52, motor shaft 53, overflow valve 6, bidirectional hydraulic lock 8, choke plug 81, left return spring 821, right return spring 822, hydraulic control piston 83, check valve 9a, check valve 9b, spring 91, valve housing 92, check valve 93, valve housing 931, valve body 932, sealing ring 933, O-shaped ring 94, integrated oil way valve block 10, hydraulic cylinder 11, oil return pipe 14, hydraulic oil 15, rodless cavity f, rod cavity g, oil way al, oil way bl

The zero-leakage bidirectional pump hydraulic system shown in fig. 1 to 5 comprises an oil tank 1, a bidirectional gear pump 3 for pumping oil is arranged in the oil tank 1, the bidirectional gear pump 3 is connected with a double-steering motor 5 through a connecting shaft 4, an integrated oil way valve block 10 is arranged between the double-steering motor 5 and the bidirectional gear pump 3, a bidirectional hydraulic lock 8 is arranged in the integrated oil way valve block, the bidirectional hydraulic lock 8 comprises two plugs 81 which are symmetrically arranged, a check valve 93 is arranged in the plug 81, a hydraulic control piston 83 which can move along the horizontal direction to push the plugs is arranged between the two plugs, springs, respectively a left return spring 821 and a right return spring 822, a check valve 93 is arranged in the plug, and an oil passage for communicating the hydraulic control piston 83 with the oil tank is also arranged in the integrated oil passage valve block 10.

The oil path channels comprise a first oil path channel a, a second oil path channel b, a third oil path channel c, a fourth oil path channel d and a fifth oil path channel e, the bidirectional hydraulic lock comprises an upper half body and a lower half body, a plug 81 is arranged between the upper half body and the lower half body, the fifth oil path channel e is arranged on the central axis of the lower half body, the first oil path channel a and the second oil path channel b are arranged on the lower half body and are symmetrically distributed along the central axis, the third oil path channel c and the fourth oil path channel d are symmetrically arranged on the upper half body and are symmetrically distributed along the central axis, an O-shaped sealing ring is arranged on the outer surface of a hydraulic control piston 83, an overflow valve 6 and a gear pump 14 are connected with a bidirectional gear pump 3 through a connecting shaft 4, an oil inlet filter 2 is arranged on an oil suction pipe of the double-steering motor 5, a motor shaft at the rear end of the double-steering motor 5 is provided with a 6.35mm hexagonal groove, the rodless cavity end of the hydraulic control piston 83 is provided with an oil return hole k, and the integrated oil way valve block 10 is formed by vacuum die casting.

The utility model discloses a theory of operation is: when the double-steering motor 5 rotates forwards, the double-direction gear pump 3 is driven to rotate forwards, low-pressure hydraulic oil 15 is pumped into a third oil passage c of the integrated oil passage valve block 10 through the oil inlet filter to form high-pressure hydraulic oil, the hydraulic oil pushes the one-way valve 9a away and enters the first oil passage a and then enters a rodless cavity f of the hydraulic oil cylinder 11, the hydraulic oil enters the channel c, a hydraulic control piston 83 in the double-direction hydraulic lock is pushed to be opened through the one-way valve 9b, the hydraulic oil in a rod cavity g of the hydraulic oil cylinder 11 returns to the double-direction gear pump 3 through a fifth oil passage e through the second oil passage b, and a circulating oil passage starts to normally stretch out the oil cylinder;

(2) when the double-steering motor 5 rotates reversely, the two-way gear pump 3 is driven to rotate reversely, low-pressure hydraulic oil 15 is pumped into a fifth oil channel e of the integrated oil channel valve block 10 through the oil inlet filter 2 to form high-pressure hydraulic oil, the hydraulic oil pushes a one-way valve 9b away and enters a second oil channel b to enter a rodless cavity f of the hydraulic oil cylinder 11, the hydraulic oil enters the fifth oil channel e, a hydraulic control piston 83 in the two-way hydraulic lock 8 is opened through the one-way valve 9a, the hydraulic oil in a rod cavity g of the hydraulic oil cylinder 11 returns to the gear pump through a1 and c, because the oil in the rodless cavity f is more than the oil in the rod cavity g, the redundant hydraulic oil returns to the oil tank 1 from the first oil channel a through an oil channel a1 and the fourth oil channel d, and otherwise, a larger back pressure exists; and forming a circulating oil path to start normal retraction of the oil cylinder.

Preferably, in order to solve the problem that the system can normally extend out and retract to a 6.35mm hexagonal groove arranged on a motor shaft at the rear end of the double-steering motor 5 when the system is not powered, a tool can be inserted into the hexagonal groove to rotate the motor shaft to realize manual operation when the system is not powered.

Preferably, in order to solve the problem of success rate of switching between extension and retraction and improve the stability of the system, two return springs, namely a left return spring 821 and a right return spring 822, are arranged at two ends of the hydraulic control piston 83.

The system does not adopt the traditional one-way (rotation direction) motor, one-way pump and reversing valve to switch the extending and retracting forms, but adopts a two-way motor (rotation direction) and two-way pump form to realize the extending and retracting switching of the oil way through the motor steering (positive and negative rotation); compared with a reversing valve, the system is theoretically higher in reliability, efficiency and economy, and can be operated manually in the absence of electricity.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a zero leaks two-way pump hydraulic system, includes an oil tank be provided with the two-way gear pump that is used for extracting fluid in the oil tank, two-way gear pump links to each other with a two steering motor through a connecting axle, its characterized in that two steering motor with install integrated oil circuit valve piece between the two-way gear pump, be provided with two-way hydraulic pressure lock in the integrated oil circuit valve piece, two-way hydraulic pressure lock is including two end caps that the symmetry set up install the check valve in the end cap, be provided with one in the middle of two end caps and follow the hydraulic control piston that the horizontal direction removed and promote the end cap, install the spring between hydraulic control piston and two end caps be provided with the check valve in the end cap, still be provided with the oil circuit way that is used for communicateing hydraulic control piston and oil tank in the integrated oil circuit valve piece.

2. The zero-leakage bidirectional pump hydraulic system according to claim 1, wherein the oil passages comprise first, second, third, fourth and fifth oil passages, the bidirectional hydraulic lock comprises an upper half and a lower half, the choke plug is mounted between the upper half and the lower half, the fifth oil passage is disposed on a central axis of the lower half, the first and second oil passages are disposed in the lower half and symmetrically distributed along the central axis, and the third and fourth oil passages are symmetrically disposed in the upper half and symmetrically distributed along the central axis.

3. The zero-leakage bi-directional pump hydraulic system of claim 1, wherein an O-ring is mounted on an outer surface of the pilot operated piston.

4. The zero-leakage bi-directional pump hydraulic system of claim 1, further comprising an overflow valve and an oil return pipe, wherein the overflow valve and the oil return pipe are connected with the bi-directional gear pump through the connecting shaft.

5. The zero-leakage two-way pump hydraulic system according to claim 1, wherein an oil inlet filter is mounted on an oil suction pipe of the gear pump.

6. The zero-leakage bi-directional pump hydraulic system of claim 1, wherein a 6.35mm hexagonal groove is formed on a motor shaft at the rear end of the double steering motor.

7. The zero-leakage bi-directional pump hydraulic system of claim 1, wherein the rodless cavity end of the pilot operated piston is provided with an oil return hole.

8. The zero-leakage bi-directional pump hydraulic system of claim 1, wherein the integrated oil circuit valve block is formed by vacuum die casting.