CN219974878U

CN219974878U - Pump bearing body

Info

Publication number: CN219974878U
Application number: CN202320190599.4U
Authority: CN
Inventors: 柳慧; 于光佐; 王洪波; 温建廷; 段少东; 周晓辉
Original assignee: Guoneng Shanxi Hequ Power Generation Co ltd; National Energy Group Guoyuan Power Co Ltd
Current assignee: Guoneng Shanxi Hequ Power Generation Co ltd; National Energy Group Guoyuan Power Co Ltd
Priority date: 2023-01-29
Filing date: 2023-01-29
Publication date: 2023-11-07
Anticipated expiration: 2033-01-29

Abstract

The present disclosure relates to a pump bearing body, comprising: a shell, one end of which is provided with a mounting port; the gland is arranged at the mounting port; a pump shaft arranged in the shell and a first end of which passes through the gland and extends out of the shell; the bearing is arranged in the shell and sleeved on the outer side of the pump shaft; and the cooling chamber is circumferentially arranged on one or both of the shell and the gland, the shell and the gland are both in contact with the bearing, the cooling chamber is configured as a groove body, an opening of the groove body faces to the outer side of the shell, and a sealing cover plate is arranged at the opening. According to the cooling device, the cooling cavity is circumferentially arranged on one or both of the shell and the gland to cool the bearing, the shell and the gland are in contact with the bearing to enable the bearing to form heat exchange with the cooling cavity, the cooling cavity is a groove body, an opening of the cooling cavity faces to the outer side, processing is facilitated, and the cooling cavity is formed by sealing the sealing cover plate after the groove body is processed.

Description

Pump bearing body

Technical Field

The present disclosure relates to the field of power pump technology, and in particular, to a pump bearing body.

Background

In use, the conventional pump bearing body is found to naturally dissipate heat in the bearing body in a bearing temperature heat dissipation mode in operation, the temperature in use is obviously higher than the design temperature, and the heat dissipation requirement of the thrust bearing cannot be met by means of the conventional bearing body heat dissipation structure, so that the problem is that the thickness of an oil film of the thrust bearing is smaller than the design value, the abrasion of the thrust bearing is aggravated, and the deterioration and emulsification of lubricating oil are accelerated.

Disclosure of Invention

It is an object of the present disclosure to provide a pump bearing body that can solve the above-mentioned problems.

In order to achieve the above object, the present disclosure provides a pump bearing body including: a shell, one end of which is provided with a mounting port; the gland is arranged at the mounting port; a pump shaft arranged in the shell and a first end of which passes through the gland and extends out of the shell; the bearing is arranged in the shell and sleeved on the outer side of the pump shaft; and the cooling chamber is circumferentially arranged on one or both of the shell and the gland, the shell and the gland are both in contact with the bearing, the cooling chamber is configured as a groove body, an opening of the groove body faces to the outer side of the shell, and a sealing cover plate is arranged at the opening.

Optionally, the cooling chamber is arranged on the gland and used for filling cooling medium, the inner wall of the gland is propped against the bearing, and the gland is provided with a liquid inlet and a liquid outlet which are communicated with the cooling chamber.

Optionally, the liquid inlet and the liquid outlet are respectively arranged on the upper part of the gland, and one end of the gland, which is far away from the pump shaft, is arranged in an upward inclined manner.

Optionally, the nominal sealing pressure of the cooling chamber is greater than the pressure of the cooling medium.

Optionally, the pump bearing body further comprises a positioning sleeve, the positioning sleeve is arranged between the pump shaft and the gland, and two ends of the positioning sleeve extend along the axial direction and exceed the edge of the gland so as to increase the contact area between the pump shaft and the positioning sleeve.

Optionally, be equipped with on the pump shaft and be used for installing the mounting groove of bearing, the spacer bush with the pump shaft is connected, the spacer bush be close to the one end of mounting groove with the lateral wall of mounting groove flushes, the cover is equipped with the oil slinger on the pump shaft with the second that first end is relative holds, the oil slinger is close to the one end of mounting groove with the lateral wall of mounting groove flushes.

Optionally, the pump bearing body further comprises a bearing sleeve, and the bearing is installed in the installation groove through the bearing sleeve.

Optionally, be equipped with the installation cavity in the casing, the bearing sets up in the installation cavity, the gland sets up the installation cavity the erection joint department, the spacer bush with the gland forms labyrinth seal structure, the bottom of installation cavity is equipped with the oil return channel with the oil pocket intercommunication and is used for the intercommunication the installation cavity with the oil return hole of oil return channel.

Optionally, the labyrinth seal structure comprises a plurality of convex teeth arranged on one of the locating sleeve and the gland at intervals and tooth grooves meshed with the convex teeth and arranged on the other.

Optionally, the pump bearing body is a bearing body of a single impeller double suction pump.

Through above-mentioned technical scheme, in the pump bearing body that this disclosure provided, the one end of casing is equipped with the installing port, the gland sets up in installing port department, the pump shaft rotates with the casing through setting up at the casing internal bearing and is connected, because the in-process bearing that the pump shaft is high-speed rotatory can produce heat, set up the cooling chamber for the bearing cooling through circumference on one or both of casing and gland, casing and gland all contact with the bearing in order to make bearing and cooling chamber form heat exchange, cooling chamber is the cell body, its opening is towards the outside, be convenient for process, form cooling chamber through the sealed apron seal after finishing the cell body.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a side cross-sectional view of a pump bearing body according to the present disclosure;

FIG. 2 is a front cross-sectional view of a pump bearing body according to the present disclosure;

FIG. 3 is a perspective view of a pump bearing body according to the present disclosure;

FIG. 4 is a schematic structural view of a labyrinth seal structure described in the present disclosure;

fig. 5 is a schematic structural view of a pump shaft according to the present disclosure.

Description of the reference numerals

1. A housing; 2. a bearing; 3. a pump shaft; 31. a mounting groove; 4. a gland; 5. a cooling chamber; 6. sealing the cover plate; 7. a positioning sleeve; 8. a bearing sleeve; 9. oil slinger; 10. a fastening nut; 11. a mounting cavity; 12. an oil chamber; 13. an oil return hole; 14. an oil return passage; 15. a liquid inlet; 16. a liquid outlet; 17. a labyrinth seal structure; 171. tooth slots; 172. convex teeth.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In this disclosure, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used to generally refer to the gravitational direction of the respective component in the use state, and "inner, outer" refer to the inner, outer relative to the contour of the component or structure itself. In addition, it should be noted that terms such as "first, second", etc. are used to distinguish one element from another element without order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

As shown in fig. 1-5, the present disclosure provides a pump bearing body comprising: a housing 1, one end of which is provided with a mounting opening; a gland 4 arranged at the mounting port; a pump shaft 3 disposed within the housing 1 and having a first end extending out of the housing 1 through the gland 4; the bearing 2 is arranged in the shell 1 and sleeved on the outer side of the pump shaft 3; and a cooling chamber 5 circumferentially provided on one or both of the housing 1 and the gland 4, the housing 1 and the gland 4 both being in contact with the bearing 2, the cooling chamber 5 being configured as a groove body having an opening facing the outside of the housing 1, the opening being provided with a sealing cover plate 6.

Through above-mentioned technical scheme, in the pump bearing body that this disclosure provided, the one end of casing 1 is equipped with the installing port, gland 4 sets up in the installing port department, pump shaft 3 rotates with casing 1 through the bearing 2 that sets up in casing 1 to be connected, because the in-process bearing 2 that pump shaft 3 rotated at a high speed can produce heat, through set up cooling chamber 5 for bearing 2 cooling on one or both of casing 1 and gland 4 circumference, casing 1 and gland 4 all contact with bearing 2 so that bearing 2 and cooling chamber 5 form heat exchange, cooling chamber 5 is the cell body, its opening is towards the outside, be convenient for process, form cooling chamber 5 through sealing up 6 seal after finishing the cell body.

As an alternative embodiment, as shown in fig. 1-3, the cooling chamber 5 is arranged on the gland 4 and is used for filling cooling medium, the cooling medium can be cooling water, the inner wall of the gland 4 is propped against the bearing 2, on one hand, the bearing 2 can be fixed, on the other hand, heat exchange is formed between the inner wall of the gland 4 and the bearing 2, and the gland 4 is provided with a liquid inlet 15 and a liquid outlet 16 which are communicated with the cooling chamber 5. In other embodiments, the cooling chamber 5 may be provided on the housing 1 or on both the housing 1 and the gland 4 with the cooling chamber 5.

Optionally, as shown in fig. 2, the liquid inlet 15 and the liquid outlet 16 are respectively disposed on the upper portion of the gland 4 and are disposed at an upward inclination away from one end of the pump shaft 3, the gland 4 is mounted on the housing 1 by bolts, the liquid inlet 15 and the liquid outlet 16 are disposed to avoid the bolts, the pump bearing body is disposed at a lower position, and the liquid inlet 15 and the liquid outlet 16 are disposed on the upper portion of the gland 4 and are disposed at an inclination to facilitate the installation of the water pipe.

The nominal sealing pressure of the cooling chamber 5 is greater than the pressure of the cooling medium, for example the nominal sealing pressure of the cooling chamber 5 is twice the pressure of the cooling medium, ensuring that the cooling chamber 5 is tightly sealed.

As an alternative embodiment, as shown in fig. 1-5, the pump bearing body further includes a positioning sleeve 7, where the positioning sleeve 7 is disposed between the pump shaft 3 and the gland 4, and two ends of the positioning sleeve 7 extend axially beyond the edge of the gland 4 to increase the contact area between the pump shaft 3 and the positioning sleeve 7, and further increase the radial bearing capacity of the pump shaft 3.

Optionally, be equipped with the mounting groove 31 that is used for installing bearing 2 on the pump shaft 3, the spacer 7 is connected with pump shaft 3, the spacer 7 is close to the one end of mounting groove 31 and the lateral wall of mounting groove 31 flush, the cover is equipped with the oil slinger 9 on the second end opposite to first end on the pump shaft 3, the one end that the oil slinger 9 is close to mounting groove 31 flushes with the lateral wall of mounting groove 31, oil slinger 9 is the effect of carrying, take lubricating oil to the epaxial that is higher than the liquid level, oil slinger 9 sets up in oil pocket 12 to lubricating oil to bearing 2 department, oil slinger 9 passes through fastening nut 10 and installs on pump shaft 3, bearing 2 sets up in mounting groove 31, impeller blade causes pump shaft 3 to produce axial float because of factors such as casting unbalance, cold and hot shrink deviation, the lateral wall of mounting groove 31 is less than bearing 2 contact area, pump shaft 3 can not be fine, and the time has been longer and can make the lateral wall of mounting groove 31 appear wearing and tearing, cause the unusual axial float in the pump rotor operation, spacer 7 and oil slinger 9 flushes with the lateral wall of mounting groove 31, in order to increase the area with bearing 2 contact with the lateral wall of mounting groove 31 prevents wearing and tearing.

In addition, the pump bearing body further comprises a bearing sleeve 8, the bearing 2 is installed in the installation groove 31 through the bearing sleeve 8, the bearing sleeve 8 and the pump shaft 3 can be connected through keys, the inner ring of the bearing 2 is in interference fit with the bearing sleeve 8, and the bearing sleeve 8 can further overcome axial movement of the bearing 2.

Optionally, be equipped with installation cavity 11 in the casing 1, bearing 2 sets up in installation cavity 11, gland 4 sets up the erection joint department in installation cavity 11, bearing 2 passes through gland 4 to be fixed in installation cavity 11, locating sleeve 7 forms labyrinth seal structure 17 with gland 4, former embodiment is rubber skeleton oil blanket, in operation skeleton oil blanket and pump shaft 3 direct contact, very easily cause rubber wearing and tearing, and then form the equipartition clearance with pump shaft 3 and arouse the oil leak, the bottom of installation cavity 11 is equipped with the oil return channel 14 with oil pocket 12 intercommunication and is used for the oil return hole 13 of intercommunication installation cavity 11 and oil return channel 14, lubricating oil in the installation cavity 11 is blocked by labyrinth seal structure 17 and prevents to reveal, unnecessary lubricating oil flows back to oil pocket 12 through oil return hole 13 and oil return channel 14 again.

Wherein, as shown in fig. 4, the labyrinth seal structure 17 comprises a plurality of convex teeth 172 arranged at intervals on one of the positioning sleeve 7 and the gland 4 and tooth grooves 171 arranged on the other and meshed with the convex teeth 172, the convex teeth 172 extend into the tooth grooves 171 but do not contact with the tooth grooves 171, abrasion is prevented, the pump shaft 3 is fixed with the bearing 2 through the mounting groove 31, the positioning sleeve 7 and the oil slinger 9, axial movement of the pump shaft 3 is reduced, and even tiny movement does not affect the convex teeth 172 and the tooth grooves 171 because a certain gap is arranged between the convex teeth 172 and the tooth grooves 171.

In the first embodiment, the convex teeth 172 are arranged on the positioning sleeve 7, and the tooth grooves 171 are arranged on the gland 4;

in the second embodiment, the teeth 172 are provided on the gland 4 and the teeth grooves 171 are provided on the positioning sleeve 7.

As an alternative implementation mode, the pump bearing body is a bearing body of a single-impeller double-suction pump, and is a front-mounted pump used for domestic subcritical and supercritical generator sets, and the single-impeller double-suction pump discovers that impeller blades are excessively large in axial thrust due to factors such as casting imbalance, cold and hot shrinkage deviation and the like in actual operation, so that the pump shaft 3 can axially float, and the pump shaft 3 is fixed with the bearing 2 through the mounting groove 31, the positioning sleeve 7 and the oil slinger 9, so that the axial float is reduced.

When in actual use, the cooling chamber 5 is arranged on the gland 4 to dissipate heat of the bearing 2, the pump shaft 3 is fixed with the bearing 2 through the mounting groove 31, the positioning sleeve 7 and the oil slinger 9, so that axial movement is reduced, and the labyrinth seal structure 17 is arranged between the positioning sleeve 7 and the gland 4 to prevent oil leakage.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A pump bearing body, comprising:

a shell, one end of which is provided with a mounting port;

the gland is arranged at the mounting port;

a pump shaft arranged in the shell and a first end of which passes through the gland and extends out of the shell;

the bearing is arranged in the shell and sleeved on the outer side of the pump shaft; and

the cooling cavity is circumferentially arranged on one or both of the shell and the gland, the shell and the gland are in contact with the bearing, the cooling cavity is configured into a groove body, an opening of the groove body faces to the outer side of the shell, and a sealing cover plate is arranged at the opening;

the pump bearing body further comprises a positioning sleeve, wherein the positioning sleeve is arranged between the pump shaft and the gland, and two ends of the positioning sleeve extend along the axial direction and exceed the edge of the gland so as to increase the contact area between the pump shaft and the positioning sleeve; the pump shaft is provided with a mounting groove for mounting the bearing, the positioning sleeve is connected with the pump shaft, one end, close to the mounting groove, of the positioning sleeve is flush with the side wall of the mounting groove, an oil slinger is sleeved on a second end, opposite to the first end, of the pump shaft, and one end, close to the mounting groove, of the oil slinger is flush with the side wall of the mounting groove.

2. The pump bearing body according to claim 1, wherein the cooling chamber is arranged on the gland, and is used for filling cooling medium, the inner wall of the gland is propped against the bearing, and the gland is provided with a liquid inlet and a liquid outlet which are communicated with the cooling chamber.

3. The pump bearing body of claim 2, wherein the liquid inlet and the liquid outlet are respectively disposed at an upper portion of the gland and are disposed with an upward inclination at an end of the two ends away from the pump shaft.

4. Pump bearing body according to claim 2, characterized in that the nominal sealing pressure of the cooling chamber is greater than the pressure of the cooling medium.

5. The pump bearing body of claim 1, further comprising a bearing housing, the bearing being mounted in the mounting groove by the bearing housing.

6. The pump bearing body according to claim 1, wherein an installation cavity is arranged in the shell, the bearing is arranged in the installation cavity, the gland is arranged at the installation opening of the installation cavity, the positioning sleeve and the gland form a labyrinth sealing structure, and an oil return channel communicated with the oil cavity and an oil return hole used for communicating the installation cavity with the oil return channel are arranged at the bottom of the installation cavity.

7. The pump bearing body of claim 6, wherein the labyrinth seal structure includes a plurality of spaced apart teeth disposed on one of the locating sleeve and the gland and a plurality of tooth slots disposed on the other for engagement with the teeth.

8. The pump bearing body of claim 1, wherein the pump bearing body is a bearing body of a single impeller double suction pump.