CN211258992U

CN211258992U - Gear pump

Info

Publication number: CN211258992U
Application number: CN201922125605.4U
Authority: CN
Inventors: 王全锁; 王保国; 郑向军; 杨太康
Original assignee: Shanxi Scenery Machinery Manufacturing Co ltd
Current assignee: Shanxi Scenery Machinery Manufacturing Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-08-14
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a gear pump, including transmission shaft, bearing oil blanket, flange protecgulum, preceding pump cover, the pump body and back pump cover, the bearing oil blanket suit is on the transmission shaft and is located between preceding pump cover and the flange protecgulum, wherein, set up interior draining hole on the transmission shaft; an oil drainage groove communicated with the inner oil drainage hole is formed in the front pump cover; the rear pump cover is provided with an outer oil leakage hole extending along the radial direction of the rear pump cover; the oil drainage groove, the inner oil drainage hole and the outer oil drainage hole form a passage for enabling hydraulic oil to flow outwards in a circulating mode. The utility model discloses a gear pump can distribute away the heat of gear pump during operation fast, reduces pump body temperature, improves gear pump working property, extension gear pump life.

Description

Gear pump

Technical Field

The invention relates to the technical field of mechanical engineering, in particular to a low-speed gear pump.

Background

The gear pump has the advantages of simple and compact structure, small volume, light weight, large rotating speed range and the like, so the gear pump is widely applied to various industrial fields, and the structure and the variety of the gear pump are various. In the gear pump in the prior art, the oil circuit circulation usually adopts the internal circulation of the pump body, when the gear pump works, the temperature of the pump body is high due to poor heat dissipation of hydraulic oil, and the service life of the gear pump is shortened.

Disclosure of Invention

The utility model aims at solving the above problem, provide a gear pump, can distribute away the heat of gear pump during operation fast, reduce pump body temperature, improve gear pump working property, extension gear pump life.

In order to realize the above purpose of the utility model, the gear pump of the utility model comprises a transmission shaft, a bearing oil seal, a flange front cover, a front pump cover, a pump body and a rear pump cover, wherein the bearing oil seal is sleeved on the transmission shaft and is positioned between the front pump cover and the flange front cover, and the transmission shaft is provided with an inner oil drainage hole; an oil drainage groove communicated with the inner oil drainage hole is formed in the front pump cover; the rear pump cover is provided with an outer oil leakage hole extending along the radial direction of the rear pump cover; the oil drainage groove, the inner oil drainage hole and the outer oil drainage hole form a passage for enabling hydraulic oil to flow outwards in a circulating mode.

Preferably, the inner oil drainage hole comprises a first inner oil drainage hole extending along the axial direction of the transmission shaft and a second inner oil drainage hole extending along the radial direction of the transmission shaft, and the oil drainage groove is communicated with the second inner oil drainage hole.

And the second inner oil drainage hole is formed in the part, located between the bearing oil seal and the front pump cover, of the transmission shaft.

The first inner oil drainage hole extends from the second inner oil drainage hole to one end, used for being arranged in the rear pump cover, of the transmission shaft.

The first inner oil drainage hole and the second inner oil drainage hole are circular oil drainage holes respectively.

Furthermore, the heat dissipation device also comprises a heat dissipation groove which is arranged on the outer end surface of the rear pump cover and used for dissipating heat.

Preferably, the heat dissipation groove comprises a plurality of longitudinal grooves and a plurality of transverse grooves, and the plurality of longitudinal grooves and the plurality of transverse grooves are mutually crossed.

Compared with the prior art, the utility model discloses a gear pump has following beneficial effect:

the utility model discloses the gear pump, at gear pump during operation, interior draining hole and the oilhole that leaks are flowed through to hydraulic oil, can leak hydraulic oil fast, and the heat that makes the during operation produce distributes away fast, reduces the heat and to the harmful effects that the pump body intensifies and causes, improves gear pump working property and life, and the radiating groove of seting up on the pump cover of back, can make gear pump heat dispersion better.

The present invention will be described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a gear pump of the present invention;

FIG. 2 is a right side elevational view of the gear pump illustrated in FIG. 1;

FIG. 3 is a half-sectional view of the gear pump of the present invention;

fig. 4a is a perspective view of a first structure of a transmission shaft according to the present invention;

FIG. 4b is a half-sectional view of the drive shaft of FIG. 4 a;

fig. 5a is a perspective view of a second structure of the transmission shaft of the present invention;

FIG. 5b is a half-sectional view of the drive shaft of FIG. 5 a;

FIG. 6 is a perspective view of a first configuration of a front pump cover according to the present invention;

FIG. 7 is a perspective view of a second construction of a front pump cover according to the present invention;

fig. 8 is a perspective view of the rear pump cover of the present invention fig. 9 is a perspective view of a structure of the rear pump cover of the present invention.

Detailed Description

As shown in fig. 1-3, which are respectively schematic structural diagrams of the gear pump according to the embodiment of the present invention, it can be seen from the drawings that the gear pump according to the present embodiment includes a transmission shaft 1, a bearing oil seal 6, a flange front cover 2, a front pump cover 3, a pump body 4 and a rear pump cover 5, the bearing oil seal 6 is sleeved on the transmission shaft 1 and is located between the front pump cover 3 and the flange front cover 2, wherein an inner oil drainage hole is formed on the transmission shaft 1; the front pump cover 3 is provided with a drain groove 31 (shown in fig. 3, 6 and 7) communicated with the inner drain hole; the rear pump cover 5 is provided with an outer oil leakage hole 52 (shown in fig. 8) extending in the radial direction thereof; the drain groove 31, the inner drain hole, and the outer drain hole 52 form a passage for circulating the hydraulic oil outward.

Specifically, as shown in fig. 1 to fig. 3, the gear pump of this embodiment has a transmission shaft 1, a bearing oil seal 6, a flange front cover 2, a front pump cover 3, a pump body 4, and a rear pump cover 5 are sleeved on the transmission shaft 1, the flange front cover 2, the front pump cover 3, the pump body 4, and the rear pump cover 5 are sequentially arranged from front to back along the axial direction of the transmission shaft 1, the front end of the transmission shaft 1 extends out of the flange front cover 2, and the bearing oil seal 6 is sleeved on the part of the transmission shaft 1 between the front pump cover 3 and the flange front cover 2. In addition, the gear pump further includes a pump core (the pump core includes an inner gear ring, an axial clearance compensation component, a radial clearance compensation component, etc.), a special-shaped seal ring arranged in the rear pump cover 5, and a bearing, which may adopt the structure and assembly manner of the prior art, and the structure of these components is not described in detail herein.

In the present embodiment, an inner oil drainage hole is provided on the transmission shaft 1, as shown in fig. 4a to 5b, the inner oil drainage hole includes a first inner oil drainage hole 12 extending along the axial direction of the transmission shaft 1 and a second inner oil drainage hole 11 extending along the radial direction of the transmission shaft 1, the second inner oil drainage hole 11 is provided on the portion of the transmission shaft 1 located between the bearing oil seal 6 and the front pump cover 3, and the outer opening is located on the outer wall of the transmission shaft 1, the first inner oil drainage hole 12 extends from the second inner oil drainage hole 11 to the end of the transmission shaft 1 (as shown in fig. 3 to 5 b) for being arranged in the rear pump cover 5, the first inner oil drainage hole 12 is vertically communicated with the second inner oil drainage hole 11, and the first inner oil drainage hole 12 and the second inner drainage hole 11 are circular oil drainage holes respectively. During manufacturing, the front end of the transmission shaft 1 may be provided with a key slot (as shown in fig. 5a and 5 b) according to requirements, or a gear (as shown in fig. 4a and 4 b) is arranged at the front end of the transmission shaft 1.

As shown in fig. 3, the oil drain groove 31 of the present embodiment is formed in the front pump cover 3, one opening is located in the center of the end surface of the front pump cover 3 facing the flange front cover 2, and the outer contour of the front pump cover 3 may be circular (as shown in fig. 7), may also be square (as shown in fig. 6), and may also be in other shapes. The outer oil drain hole 52 is disposed on the rear pump cover 5 and extends in the radial direction thereof, an outer opening of the outer oil drain hole 52 is located on the outer wall of the rear pump cover 5 (as shown in fig. 8), and an inner opening is communicated with a shaft hole of the rear pump cover 5 for accommodating the transmission shaft 1 (as shown in fig. 3).

The oil drainage groove 31 is communicated with the second inner oil drainage hole 11 in the inner oil drainage hole, and the outer oil drainage hole 52 is communicated with the first inner oil drainage hole 12 in the inner oil drainage hole, so that the oil drainage groove 31, the second inner oil drainage hole 1, the first inner oil drainage hole 12 and the outer oil drainage hole 52 form a passage through which hydraulic oil can flow outwards in a circulating manner. That is, the hydraulic oil entering the oil drainage groove 31 flows out of the pump body through the second inner oil drainage hole 1, the first inner oil drainage hole 12 and the outer oil drainage hole 52 in sequence, so that the lubricating oil and the hydraulic oil which leak from the inside (such as from the clearance between the axial clearance compensation part, the radial clearance compensation part and the pump body) in the working process of the gear pump do not pass through the internal circulation, the influence of heat on the temperature rise of the pump body is reduced, the temperature of the pump body is effectively reduced, and the heat dissipation performance is better.

When in design, the outer contour of the rear pump cover 5 can be round, square or other shapes, and the shapes are matched with the shapes of the pump body and the front pump cover. Further, in order to quickly dissipate the heat of the hydraulic oil flowing to the rear pump cover 5, the present embodiment may further include a heat dissipation groove 51 provided on the outer end surface of the rear pump cover 5 for heat dissipation. As shown in fig. 1, 2, and 9, the heat dissipating groove 51 includes a plurality of longitudinal grooves and a plurality of transverse grooves, and the plurality of longitudinal grooves and the plurality of transverse grooves intersect with each other. When the pump cover is designed, the rear pump cover 5 can be in a shape of combining a column body and a frustum, namely, the part of the rear pump cover 5 departing from the pump body 4 is convex outwards relative to the part contacting the pump body 4, and a plurality of criss-cross radiating grooves 51 are formed in the convex part.

To sum up, compare with prior art, the utility model discloses a gear pump has following beneficial effect:

the utility model discloses the gear pump, at gear pump during operation, hydraulic oil is through interior draining hole and the oilhole that leaks outward and realize the extrinsic cycle, can make hydraulic oil leak outward, distributes away a large amount of heats that gear pump during operation produced fast, reduces the harmful effects that the heat heaies up the pump body and causes, improves gear pump working property and life, in addition, the heat dissipation groove of seting up on the rear pump cover also can accelerate the gear pump heat dissipation for the heat dispersion of gear pump is better.

Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and therefore, various modifications performed according to the principle of the present invention should be understood as falling into the protection scope of the present invention.

Claims

1. The utility model provides a gear pump, includes transmission shaft, bearing oil blanket, flange protecgulum, preceding pump cover, the pump body and back pump cover, and bearing oil blanket suit is on the transmission shaft and be located between preceding pump cover and the flange protecgulum, its characterized in that:

an inner oil drainage hole is formed in the transmission shaft;

an oil drainage groove communicated with the inner oil drainage hole is formed in the front pump cover;

the rear pump cover is provided with an outer oil leakage hole extending along the radial direction of the rear pump cover;

the oil drainage groove, the inner oil drainage hole and the outer oil drainage hole form a passage for enabling hydraulic oil to flow outwards in a circulating mode.

2. The gear pump of claim 1, wherein the internal drain relief bore includes a first internal drain relief bore extending axially of the drive shaft and a second internal drain relief bore extending radially of the drive shaft, the drain groove communicating with the second internal drain relief bore.

3. The gear pump of claim 2, wherein the second inner drain hole opens on a portion of the drive shaft between the bearing oil seal and the front pump cover.

4. The gear pump of claim 3, wherein the first internal drain relief hole extends from the second internal drain relief hole to an end of the drive shaft for seating within the rear pump cover.

5. The gear pump of claim 4, wherein the first and second internal drain holes are each circular drain holes.

6. The gear pump of any one of claims 1-5, further comprising a heat dissipation groove for dissipating heat disposed on an outer end face of the rear pump cover.

7. The gear pump of claim 6, wherein the heat sink slots comprise a plurality of longitudinal slots and a plurality of transverse slots, and wherein the plurality of longitudinal slots and the plurality of transverse slots intersect one another.