CN215370227U

CN215370227U - Gear pump front cover with overflow protection function

Info

Publication number: CN215370227U
Application number: CN202121573898.3U
Authority: CN
Inventors: 王洪洋; 徐学勇; 崔晓亮; 祝爱
Original assignee: Yantai Tongrun Hydraulic Parts Co ltd
Current assignee: Yantai Tongrun Hydraulic Parts Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-12-31
Anticipated expiration: 2031-07-12

Abstract

The utility model discloses a gear pump front cover with an overflow protection function, which comprises a front cover, wherein a sealing mechanism is arranged at a position close to the left side in the front cover, the sealing mechanism comprises a sealing element, a sealing ring is fixedly connected to the right side wall of the sealing element, a connecting rod is movably connected in the sealing element, the right end of the connecting rod is fixedly connected with an extrusion ring, a pressure reducing mechanism is arranged at a position close to the lower part in the front cover, the right side wall of the front cover is fixedly connected with a pump body, a gap between the front cover and a driving gear is sealed through the sealing mechanism arranged in the front cover, when the front cover overflows with the driving gear, a nut is held and rotated, the connecting rod is driven to move through the nut, so that an extrusion plate can move to extrude the sealing ring, and the sealing ring is more tightly connected with the driving gear and the front cover, thereby can prevent the continuation of overflow, prolong the life of gear pump.

Description

Gear pump front cover with overflow protection function

Technical Field

The utility model belongs to the technical field of gear pumps, and particularly relates to a gear pump front cover with an overflow protection function.

Background

The gear pump is a rotary pump which can transfer liquid or pressurize it by means of the change and movement of working volume formed between pump cylinder and meshed gear, and is formed from two gears, pump body and front and rear covers, when the gears are rotated, the volume of space of gear disengagement side is changed from small to large, and formed into vacuum to suck liquid, and the volume of space of gear meshing side is changed from large to small to squeeze liquid into pipeline, and the suction cavity and discharge cavity are separated by means of meshing line of two gears, and the pressure of gear pump discharge port is completely dependent on the resistance of pump discharge port.

At present gear pump on the market when using for a long time, can lead to taking place the lubricating oil overflow between protecgulum and the driving gear, the overflow outflow can lead to the inside condition of gear pump to change, causes the influence to the normal use of gear pump, makes the life of gear pump descend, and the overflow of lubricating oil can lead to the use cost increase of gear pump, for this reason we propose a gear pump protecgulum with overflow protect function.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a gear pump front cover with an overflow protection function to solve the problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a gear pump protecgulum with overflow protect function, includes the protecgulum, the inside left position that is close to of protecgulum is equipped with sealing mechanism, sealing mechanism includes the sealing member, the right side wall fixedly connected with sealing washer of sealing member, the inside swing joint of sealing member has the connecting rod, the right-hand member fixed connection extrusion ring of connecting rod, the inside position that is close to the below of protecgulum is equipped with the pressure reduction mechanism, the right side wall fixedly connected with pump body of protecgulum.

Preferably, the pressure reducing mechanism comprises a mounting plate, a right side wall of the mounting plate is fixedly connected with a micro cylinder, the right side wall of the micro cylinder is movably connected with a piston rod, the right end of the piston rod is fixedly connected with a movable plate, and the right side wall of the movable plate is fixedly connected with a sealing gasket.

Preferably, the outer surface of the connecting rod is provided with threads, the outer surface of the left end of the connecting rod is movably connected with a nut, the outer surface of the extrusion ring is fixedly connected with a rubber layer, and the left side wall of the rubber layer is in close contact with the right side wall of the sealing ring.

Preferably, an oil cavity is formed in the right side wall of the front cover, the pump body is connected with a driving gear and a driven gear in a rotating mode, the driven gear is located inside the oil cavity, the left end of the driving gear penetrates through the front cover and extends to the left end of the front cover, and the sealing mechanism is sleeved on the outer surface of the driving gear.

Preferably, the expansion chamber has been seted up to the inside position that is close to the below of protecgulum, and miniature cylinder, piston rod, movable plate and sealed the inside that all is located the expansion chamber of filling up, the inside swing joint of mounting panel has the bolt, and the right-hand member of bolt runs through the mounting panel and extends to the inside of protecgulum.

Preferably, a framework oil seal is arranged between the inner surface of the oil cavity and the outer surface of the driving gear, and mounting frames are arranged between the outer surfaces of the driving gear and the driven gear and the inner surface of the oil cavity.

Preferably, the lower fixed surface of protecgulum is connected with the mount, the fixed orifices has been seted up to the upper surface of mount, the right side wall fixedly connected with spacer pin of protecgulum, and the spacer pin is located the inside of the pump body, the upper fixed surface of protecgulum is connected with the seal valve, oil pipe and defeated oil pipe are led to the upper surface of seal valve and lower surface fixedly connected with respectively, and defeated oil pipe is linked together with the oil pocket.

Compared with the prior art, the utility model has the beneficial effects that:

(1) this gear pump protecgulum with overflow protect function, through setting up the sealing mechanism in the protecgulum is inside, seal the gap between protecgulum and the driving gear, when the overflow takes place for current lid and driving gear department, hold and rotate the nut, drive the connecting rod through the nut and remove, thereby can make extrusion ring remove and extrude the sealing washer, make the sealing washer inseparabler with being connected between driving gear and the protecgulum, thereby can prevent lasting of overflow, the life of extension gear pump.

(2) This gear pump protecgulum with overflow protect function through setting up the step-down mechanism in the protecgulum is inside, when the gear pump takes place the overflow, makes cylinder work drive movable plate and sealed the pad through the piston rod and remove, increases the volume of oil pocket through the extension chamber, can reduce the inside pressure of oil pocket, speed when can reducing the overflow, and can make the oil of part overflow flow take place the backward flow to can reduce the use cost of gear pump.

Drawings

FIG. 1 is a perspective view of a sealing mechanism according to the present invention;

FIG. 2 is a front cross-sectional view of the present invention;

FIG. 3 is an enlarged view of the structure of FIG. 2 at A in accordance with the present invention;

fig. 4 is an enlarged view of the structure at B in fig. 2 according to the present invention.

In the figure: 1. a front cover; 101. a fixed mount; 102. a spacing pin; 103. a sealing valve; 104. an oil delivery pipe; 105. an oil chamber; 106. framework oil seal; 2. a pump body; 201. a driving gear; 202. a driven gear; 203. a mounting frame; 3. a sealing mechanism; 301. a seal member; 302. a seal ring; 303. a connecting rod; 304. an extrusion ring; 305. a rubber layer; 306. a nut; 4. a pressure reduction mechanism; 401. mounting a plate; 402. a micro cylinder; 403. a piston rod; 404. moving the plate; 405. a gasket; 406. the lumen is expanded.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 to 4, the present invention provides a gear pump front cover with an overflow protection function, including a front cover 1, a sealing mechanism 3 is disposed inside the front cover 1 near the left side, the sealing mechanism 3 includes a sealing element 301, a sealing ring 302 is fixedly connected to the right side wall of the sealing element 301, a connecting rod 303 is movably connected inside the sealing element 301, the right end of the connecting rod 303 is fixedly connected to an extrusion ring 304, a pressure reduction mechanism 4 is disposed inside the front cover 1 near the lower side, and a pump body 2 is fixedly connected to the right side wall of the front cover 1.

In this embodiment, preferably, the pressure reducing mechanism 4 includes a mounting plate 401, a micro cylinder 402 is fixedly connected to a right side wall of the mounting plate 401, a piston rod 403 is movably connected to the right side wall of the micro cylinder 402, a moving plate 404 is fixedly connected to a right end of the piston rod 403, a gasket 405 is fixedly connected to the right side wall of the moving plate 404, the micro cylinder 402 is operated through the mounting plate 401, when the gear pump overflows, the micro cylinder 402 is operated, the moving plate 404 and the gasket 405 are driven by the piston rod 403 to move, and a space of the oil chamber 105 is increased through the expansion chamber 406, so that the pressure inside the oil chamber 105 can be reduced, and the overflow speed is reduced.

In this embodiment, it is preferable, the surface of connecting rod 303 is equipped with the screw thread, the surface swing joint of the left end of connecting rod 303 has nut 306, the outer fixed surface of extrusion ring 304 is connected with rubber layer 305, and the left side wall of rubber layer 305 and the right side wall in close contact with of sealing washer 302, nut 306 through setting is fixed connecting rod 303, prevent that connecting rod 303 from taking place to kick-back, it can drive connecting rod 303 and remove to hold and rotate nut 306, thereby can drive extrusion ring 304 and the removal of rubber layer 305 and extrude sealing washer 302, make sealing mechanism 3's sealed effect better.

In this embodiment, preferably, the oil cavity 105 has been seted up to the right side wall of protecgulum 1, the internal rotation of the pump body 2 is connected with driving gear 201 and driven gear 202, and driven gear 202 is located the inside of oil cavity 105, the left end of driving gear 201 runs through protecgulum 1 and extends to the left end of protecgulum 1, and sealing mechanism 3 cover is established on the surface of driving gear 201, through setting up driving gear 201 and driven gear 202 in the inside of the pump body 2, make the pump body 2 can drive driving gear 201 and driven gear 202 and rotate, thereby make the gear pump can normal use.

In this embodiment, preferably, the expansion cavity 406 has been seted up to the position that is close to the below in the protecgulum 1 inside, and the micro cylinder 402, the piston rod 403, the movable plate 404 and the sealed inside that fills up 405 all is located the expansion cavity 406, the inside swing joint of mounting panel 401 has the bolt, and the right-hand member of bolt runs through mounting panel 401 and extends to the inside of protecgulum 1, can fix pressure reduction mechanism 4 through expansion cavity 406, make pressure reduction mechanism 4 can normal use, fix mounting panel 401 through the bolt, can increase pressure reduction mechanism 4's stability, be convenient for pressure reduction mechanism 4 works.

In this embodiment, preferably, a framework oil seal 106 is disposed between the inner surface of the oil chamber 105 and the outer surface of the driving gear 201, mounting brackets 203 are disposed between the outer surfaces of the driving gear 201 and the driven gear 202 and the inner surface of the oil chamber 105, the sealing performance between the driving gear 201 and the front cover 1 can be increased by the disposed framework oil seal 106, the driving gear 201 and the driven gear 202 are fixed by the mounting brackets 203, and the stability of the driving gear 201 and the driven gear 202 can be increased.

In this embodiment, preferably, a fixing frame 101 is fixedly connected to a lower surface of the front cover 1, a fixing hole is formed in an upper surface of the fixing frame 101, a limit pin 102 is fixedly connected to a right side wall of the front cover 1, the limit pin 102 is located inside the pump body 2, a sealing valve 103 is fixedly connected to an upper surface of the front cover 1, an oil guide pipe and an oil conveying pipe 104 are fixedly connected to an upper surface and a lower surface of the sealing valve 103 respectively, the oil conveying pipe 104 is communicated with the oil cavity 105, an amount of oil entering the oil cavity 105 can be controlled through the sealing valve 103, waste caused by a large amount of entering oil is prevented, the front cover 1 can be fixed through the fixing frame 101 and the fixing hole, and accordingly stability of the gear pump is improved.

The working principle and the using process of the utility model are as follows: when the device is used, the front cover 1 is connected with the pump body 2 through the limiting pin 102, the sealing valve 103 is opened, oil enters the interior of the oil cavity 105 through the oil guide pipe and the oil conveying pipe 104, when the gear pump works for a long time, a gap between the driving gear 201 and the front cover 1 is easy to overflow, so that the oil inside the oil cavity 105 is wasted, and the normal use of the gear pump is influenced, so that the micro cylinder 402 works, the movable plate 404 and the sealing gasket 405 can be driven to move towards the direction close to the micro cylinder 402 through the piston rod 403, the volume of the oil cavity 105 is increased through the expansion cavity 406, so that the pressure of the oil cavity 105 can be reduced, the overflow speed of the gear pump is reduced, part of lubricating oil can flow back, so that the use cost of the gear pump is reduced, the nut 306 is held and rotated, the connecting rod 303 is driven to move through the nut 306, so that the extrusion ring 304 can move to extrude the sealing ring 302, the connection between the sealing ring 302 and the driving gear 201 and the front cover 1 is tighter, so that the overflow can be prevented from continuing, and the service life of the gear pump is prolonged.

Claims

1. The utility model provides a gear pump protecgulum with overflow protect function, includes protecgulum (1), its characterized in that: the utility model discloses a pump, including protecgulum (1), left position is close to in protecgulum (1) inside is equipped with sealing mechanism (3), sealing mechanism (3) include sealing member (301), the right side wall fixedly connected with sealing washer (302) of sealing member (301), the inside swing joint of sealing member (301) has connecting rod (303), the right-hand member fixed connection extrusion ring (304) of connecting rod (303), the position that is close to the below in protecgulum (1) inside is equipped with decompression mechanism (4), the right side wall fixedly connected with pump body (2) of protecgulum (1).

2. The gear pump front cover with the overflow protection function as claimed in claim 1, wherein: the pressure reduction mechanism (4) comprises a mounting plate (401), a right side wall of the mounting plate (401) is fixedly connected with a micro air cylinder (402), the right side wall of the micro air cylinder (402) is movably connected with a piston rod (403), a right end of the piston rod (403) is fixedly connected with a moving plate (404), and a right side wall of the moving plate (404) is fixedly connected with a sealing gasket (405).

3. The gear pump front cover with the overflow protection function as claimed in claim 1, wherein: the outer surface of the connecting rod (303) is provided with threads, the outer surface of the left end of the connecting rod (303) is movably connected with a nut (306), the outer surface of the extrusion ring (304) is fixedly connected with a rubber layer (305), and the left side wall of the rubber layer (305) is in close contact with the right side wall of the sealing ring (302).

4. The gear pump front cover with the overflow protection function as claimed in claim 1, wherein: an oil cavity (105) is formed in the right side wall of the front cover (1), a driving gear (201) and a driven gear (202) are connected to the pump body (2) in a rotating mode, the driven gear (202) is located inside the oil cavity (105), the left end of the driving gear (201) penetrates through the front cover (1) and extends to the left end of the front cover (1), and the sealing mechanism (3) is sleeved on the outer surface of the driving gear (201).

5. The gear pump front cover with the overflow protection function as claimed in claim 2, wherein: expansion chamber (406) have been seted up to the inside position that is close to the below of protecgulum (1), and miniature cylinder (402), piston rod (403), movable plate (404) and sealed pad (405) all are located the inside in expansion chamber (406), the inside swing joint of mounting panel (401) has the bolt, and the right-hand member of bolt runs through mounting panel (401) and extends to the inside of protecgulum (1).

6. The gear pump front cover with the overflow protection function as claimed in claim 4, wherein: a framework oil seal (106) is arranged between the inner surface of the oil cavity (105) and the outer surface of the driving gear (201), and mounting frames (203) are arranged between the outer surfaces of the driving gear (201) and the driven gear (202) and the inner surface of the oil cavity (105).

7. The gear pump front cover with the overflow protection function as claimed in claim 1, wherein: the lower fixed surface of protecgulum (1) is connected with mount (101), the fixed orifices has been seted up to the upper surface of mount (101), the right side wall fixedly connected with spacer pin (102) of protecgulum (1), and spacer pin (102) are located the inside of the pump body (2), the last fixed surface of protecgulum (1) is connected with seal valve (103), the upper surface and the lower surface of seal valve (103) fixedly connected with respectively lead oil pipe and defeated oil pipe (104), and defeated oil pipe (104) are linked together with oil pocket (105).