CN212985529U

CN212985529U - Sealing structure between high-low pressure areas of gear oil pump and gear oil pump

Info

Publication number: CN212985529U
Application number: CN202021972645.9U
Authority: CN
Inventors: 杨程
Original assignee: Konsk Pump Suzhou Co ltd
Current assignee: Konsk Pump Suzhou Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-04-16
Anticipated expiration: 2030-09-10

Abstract

The utility model provides a seal structure and gear oil pump between gear oil pump high-low pressure area. Grooves with the outlines in an epsilon shape are arranged on the contact end surfaces of the upper shaft seat and the upper end cover and the contact end surfaces of the lower shaft seat and the lower end cover, and rubber sealing rings and supporting frameworks are arranged in the grooves. The high-pressure area and the low-pressure area are effectively isolated through the rubber sealing ring, and pressure oil is prevented from leaking. The bottom surface of the rubber sealing ring is matched with the groove, the supporting framework can effectively limit the rubber sealing ring in the groove, the impact of pressure oil is resisted, the shape and the position of the rubber sealing ring are ensured to be kept stable, the sealing performance of the shaft seat and the end cover contact end surface is improved, and the output pressure of the gear oil pump is improved.

Description

Sealing structure between high-low pressure areas of gear oil pump and gear oil pump

Technical Field

The utility model relates to a gear oil pump technical field, especially a seal structure and gear oil pump between high low-pressure area of gear oil pump.

Background

The gear oil pump is a rotary pump which transfers liquid by means of the change and movement of the working volume formed between a pump cylinder and a meshing gear. When the gears rotate, the volume of the space on the disengagement side of the two gears is increased from small to large, vacuum is formed, liquid is sucked in, and the volume of the space on the engagement side of the gears is decreased from large to small, so that the liquid is squeezed into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears, the inner cavity is separated into a high pressure area and a low pressure area, and pressure oil can leak from a gap between the gear shaft seat and the end cover to the low pressure area due to the pressure difference between the high pressure area and the low pressure area, so that the output pressure of the gear oil pump is reduced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a sealing structure and gear oil pump between the high-low pressure area of gear oil pump.

In order to achieve the above object, the technical solution of the present invention is: a sealing structure between high-pressure and low-pressure areas of a gear oil pump is characterized in that grooves with epsilon-shaped outlines are formed in the contact end surfaces of an upper shaft seat and an upper end cover and the contact end surfaces of a lower shaft seat and a lower end cover, and rubber sealing rings and supporting frameworks are arranged in the grooves.

Adopt the utility model discloses technical scheme through rubber seal with high nip and low-pressure area effective isolation, prevents the leakage of pressure oil. The bottom surface of the rubber sealing ring is matched with the groove, the supporting framework can effectively limit the rubber sealing ring in the groove, the impact of pressure oil is resisted, the shape and the position of the rubber sealing ring are ensured to be kept stable, the sealing performance of the shaft seat and the end cover contact end surface is improved, and the output pressure of the gear oil pump is improved.

Furthermore, rubber seal is equipped with decurrent step face towards place one side at the opening, the support skeleton sets up on the step face, the support skeleton is preferred to have tough plastics material, has certain recoverable deformability, both makes things convenient for the installation of support skeleton, can cramp the rubber seal lower part in the recess again.

By adopting the preferable scheme, the supporting framework can be better attached to and supported by the rubber sealing ring, and the position of the rubber sealing ring can be more reliably limited.

Further, the highest point position of the supporting framework is lower than the highest point position of the rubber sealing ring.

Furthermore, the highest point position of the supporting framework is 0.2mm-1mm lower than that of the rubber sealing ring.

By adopting the preferable scheme, the rubber sealing ring is ensured to have the compression deformation amount after the end cover is installed, and effective sealing is ensured to be formed.

Further, the rubber sealing ring is opened to a low-pressure area of the gear oil pump.

By adopting the preferable scheme, the high-pressure area is positioned at the back side of the rubber sealing ring, the rubber sealing ring is pressed on the supporting framework, and the position and the shape of the rubber sealing ring are kept by means of the rigidity of the supporting framework.

Furthermore, the end part of the opening of the rubber sealing ring is provided with a clamping lug part protruding towards the back side of the opening.

Adopt above-mentioned preferred scheme, can restrict rubber seal's head and the tail position, prevent that rubber seal from moving about along the recess.

Furthermore, a reinforcing connecting rib is arranged in the middle of the supporting framework.

By adopting the preferable scheme, the holding capacity of the outline of the supporting framework is improved, and the deformation is prevented.

The utility model provides a gear oil pump, includes upper end cover, pump case, bottom end cover, upper shaft base, lower shaft base, driving gear and driven gear, upper end cover and bottom end cover are covered the upper end and the lower extreme of locating the pump case respectively, upper shaft base, lower shaft base, driving gear and driven gear locate in the pump case, driving gear and driven gear mesh mutually and set up, driving gear and driven gear's upper end axle is installed in the mounting hole of upper shaft base, driving gear and driven gear's lower extreme axle is installed in the mounting hole of lower shaft base adopt foretell gear oil pump high-low pressure area between the contact surface of upper shaft base and upper end cover and the contact surface of lower shaft base and bottom end cover between the seal structure.

Because the gear oil pump adopts the sealing structure, the high-pressure area and the low-pressure area are effectively isolated, the leakage of pressure oil is prevented, and the output pressure of the gear oil pump is improved.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 schematic structural view of one embodiment of a gear oil pump according to the present invention;

fig. 2 is a schematic structural view of the upper sealing structure of the upper shaft seat of the present invention;

fig. 3 is a schematic structural view of the upper shaft seat of the present invention;

fig. 4 is a schematic structural diagram of the rubber sealing ring of the present invention;

fig. 5 is a schematic structural view of the support frame of the present invention.

Names of corresponding parts represented by numerals and letters in the drawings:

10-upper end cap; 20-a pump housing; 30-lower end cap; 40-upper shaft seat; 401-grooves; 402-rubber seal ring; 4021-step surface; 4022-a retaining ear; 403-supporting framework; 4031-reinforcing connecting ribs; 50-lower shaft seat; 60-a drive gear; 70-a driven gear; 801-low pressure region; 802-high pressure zone.

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 efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 3, in an embodiment of the present invention, a sealing structure between high-pressure and low-pressure regions of a gear oil pump is provided with a groove 401 having a profile in an "epsilon" shape on a contact end surface of an upper shaft seat 40 and an upper end cap 10 and a contact end surface of a lower shaft seat 50 and a lower end cap 30, and a rubber seal 402 and a supporting framework 403 are provided in the groove 401.

The beneficial effect of adopting above-mentioned technical scheme is: the high pressure area 802 and the low pressure area 801 are effectively isolated by the rubber sealing ring 402, and the leakage of pressure oil is prevented. The bottom surface of the rubber sealing ring 402 is matched with the groove 401, the supporting framework 403 can effectively limit the rubber sealing ring 402 in the groove 401, impact of pressure oil is resisted, the shape and the position of the rubber sealing ring are ensured to be stable, the sealing performance of a contact end face of the shaft seat and the end cover is improved, and the output pressure of the gear oil pump is improved.

As shown in fig. 2, 4 and 5, in other embodiments of the present invention, rubber seal 402 is equipped with downward step surface 4021 towards one side of the opening, and support framework 403 is disposed on step surface 4021, and the support framework is preferably made of a plastic material with toughness, and has a certain recoverable deformability, which not only facilitates the installation of the support framework, but also tightens the lower portion of the rubber seal in the groove. The beneficial effect of adopting above-mentioned technical scheme is: the supporting framework can be better attached to and supported by the rubber sealing ring, and the position of the rubber sealing ring can be more reliably limited.

In other embodiments of the present invention, the highest point of the supporting frame 403 is lower than the highest point of the rubber sealing ring 402 by 0.2mm to 1 mm. The beneficial effect of adopting above-mentioned technical scheme is: the rubber sealing ring is ensured to have proper compression deformation after the end cover is installed, and effective sealing is ensured to be formed.

As shown in fig. 2, in other embodiments of the present invention, rubber seal 402 opens into a low pressure region 801 of the gear oil pump. The beneficial effect of adopting above-mentioned technical scheme is: the high-pressure area is positioned at the back side of the rubber sealing ring, the rubber sealing ring is pressed on the supporting framework, and the position and the shape of the rubber sealing ring are kept by means of the rigidity of the supporting framework.

As shown in fig. 4, in another embodiment of the present invention, a retaining lug 4022 protruding toward the back side of the opening is provided at the end of the opening of the rubber packing 402. The beneficial effect of adopting above-mentioned technical scheme is: the head and tail positions of the rubber sealing ring can be limited, and the rubber sealing ring is prevented from moving along the groove.

In other embodiments of the present invention, as shown in fig. 5, a reinforcing rib 4031 is provided at an intermediate position of the support frame 403. The beneficial effect of adopting above-mentioned technical scheme is: the holding capacity of the contour of the supporting framework is improved, and deformation is prevented.

As shown in fig. 1, a gear oil pump includes an upper end cover 10, a pump housing 20, a lower end cover 30, an upper shaft seat 40, a lower shaft seat 50, a driving gear 60 and a driven gear 70, wherein the upper end cover 10 and the lower end cover 30 are respectively covered on the upper end and the lower end of the pump housing 20, the upper shaft seat 40, the lower shaft seat 50, the driving gear 60 and the driven gear 70 are arranged in the pump housing 20, the driving gear 60 and the driven gear 70 are arranged in a meshed manner, the upper end shafts of the driving gear 60 and the driven gear 70 are arranged in the mounting holes of the upper shaft seat 40, the lower end shafts of the driving gear 60 and the driven gear 70 are arranged in the mounting holes of the lower shaft seat 50, and a sealing structure between the high-low pressure areas of the gear oil pump is adopted between the contact end surfaces of. Because the gear oil pump adopts the sealing structure, the high-pressure area and the low-pressure area are effectively isolated, the leakage of pressure oil is prevented, and the output pressure of the gear oil pump is improved.

The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a seal structure between gear oil pump high-low pressure area, gear oil pump include upper end cover, pump casing, lower end cover, upper shaft base, lower shaft base, driving gear and driven gear, upper end cover and lower end cover are covered the upper end and the lower extreme of locating the pump casing respectively, upper shaft base, lower shaft base, driving gear and driven gear locate in the pump casing, driving gear and driven gear mesh mutually and set up, the upper end axle of driving gear and driven gear is installed in the mounting hole of upper shaft base, the lower extreme axle of driving gear and driven gear is installed in the mounting hole of lower shaft base, its characterized in that open the contact surface of upper shaft base and upper end cover and the contact surface of lower shaft base and lower end cover on have the profile to become the recess of "epsilon" shape, be equipped with rubber seal and support chassis in the recess.

2. The sealing structure between the high-pressure and low-pressure areas of the gear oil pump as claimed in claim 1, wherein the rubber sealing ring is provided with a downward step surface on the side where the opening faces, and the supporting framework is arranged on the step surface.

3. The seal structure between the high-pressure and low-pressure areas of the gear oil pump as claimed in claim 2, wherein the highest point position of the supporting framework is lower than that of the rubber sealing ring.

4. The sealing structure between the high-pressure and low-pressure areas of the gear oil pump as claimed in claim 1, wherein the highest point position of the supporting framework is 0.2mm-1mm lower than that of the rubber sealing ring.

5. A seal arrangement between high and low pressure areas of a gear oil pump as defined in claim 1, wherein said rubber seal opens into the low pressure area of the gear oil pump.

6. A seal structure between high-pressure and low-pressure areas of a gear oil pump according to claim 5, characterized in that a clamping lug protruding to the back side of the opening is arranged at the end part of the opening of the rubber sealing ring.

7. The sealing structure between the high-pressure and low-pressure areas of the gear oil pump as claimed in claim 6, wherein a reinforcing connecting rib is arranged at the middle position of the supporting framework.

8. A gear oil pump is characterized by comprising an upper end cover, a pump shell, a lower end cover, an upper shaft seat, a lower shaft seat, a driving gear and a driven gear, wherein the upper end cover and the lower end cover are respectively arranged at the upper end and the lower end of the pump shell in a covering manner, the upper shaft seat, the lower shaft seat, the driving gear and the driven gear are arranged in the pump shell in a meshing manner, the upper end shafts of the driving gear and the driven gear are arranged in mounting holes of the upper shaft seat, the lower end shafts of the driving gear and the driven gear are arranged in mounting holes of the lower shaft seat, and the sealing structure between the high-pressure area and the low-pressure area of the gear oil pump is adopted between the contact end surfaces of the upper shaft seat and the upper end cover and between the contact end surfaces of the lower shaft seat and.