CN221096932U

CN221096932U - Vertical pump bearing chamber sealing structure

Info

Publication number: CN221096932U
Application number: CN202322736791.1U
Authority: CN
Inventors: 贾宁宁; 何明辉; 孙韬; 步志伟; 王堰生
Original assignee: KSB Shanghai Pump Co Ltd
Current assignee: KSB Shanghai Pump Co Ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-06-07
Anticipated expiration: 2033-10-12

Abstract

The utility model discloses a vertical pump bearing chamber sealing structure which is arranged on a pump shaft, and comprises a bearing seat, a bearing and a bearing end cover, wherein a bearing chamber for installing the bearing is arranged in the bearing seat, a first V-shaped sealing ring is arranged in a groove above the bearing seat, and an inclined groove which is communicated with the groove and is inclined to the lower part is arranged on the bearing seat; a second V-shaped sealing ring is arranged below the bearing end cover, a liquid discharge hole communicated with the bearing chamber is arranged on the bearing end cover, and the liquid discharge hole is blocked by a screw plug; the first V-shaped sealing ring and the two V-shaped sealing rings are sleeved on the pump shaft. The utility model can avoid the entry of low-temperature condensed water into the bearing chamber, thereby avoiding the failure of the pump due to the rust and abrasion of the bearing, and meeting the requirements of a low-temperature chilled water system.

Description

Vertical pump bearing chamber sealing structure

Technical Field

The utility model relates to the technical field of vertical pumps, in particular to a vertical pump bearing chamber sealing structure.

Background

The pump is used for conveying media such as clear water, sewage, seawater and the like, and the pump can normally operate only by being provided with bearings and shaft seals. The bearing chamber of the vertical pump is an important part on the pump, provides a supporting function for the rotor, and the normal operation of the bearing is one of important conditions for ensuring the normal operation of the pump. When the vertical pump is used for a low-temperature chilled water system, because the temperature of water in the pump is low, the environmental humidity is high, water vapor in the air is easy to condense into water on the pump body, the condensed water is accumulated above the bearing chamber, and easily permeates into the bearing chamber after a long time, so that the bearing dust cover is corroded, lubricating grease in the bearing is invalid, the bearing is corroded and worn, abnormal sound is generated, and the pump cannot normally run.

In order to meet the application requirements of low-temperature chilled water systems, development of a novel bearing chamber sealing structure capable of preventing water from entering a bearing chamber and avoiding the pump from being unable to normally run due to rust and abrasion of the bearing is urgent.

Disclosure of utility model

Aiming at the problems in the prior art, the utility model aims to provide a bearing chamber sealing structure of a vertical pump, which can prevent low-temperature condensed water from entering a bearing chamber, so that the problem that the pump cannot normally operate due to rust and abrasion of the bearing is avoided, and the requirement of a low-temperature chilled water system is met.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The utility model provides a vertical pump bearing chamber sealing structure which is arranged on a pump shaft and comprises a bearing seat, a bearing and a bearing end cover, wherein a bearing chamber for installing the bearing is arranged in the bearing seat, a first V-shaped sealing ring is arranged in a groove above the bearing seat, and an inclined groove which is communicated with the groove and is inclined to the lower part is arranged on the bearing seat;

A second V-shaped sealing ring is arranged below the bearing end cover, a liquid discharge hole communicated with the bearing chamber is arranged on the bearing end cover, and the liquid discharge hole is blocked by a screw plug;

the first V-shaped sealing ring and the second V-shaped sealing ring are sleeved on the pump shaft.

Preferably, the included angle between the inclined groove and the horizontal direction is 2-5 degrees.

Preferably, the pump further comprises a liquid throwing disc sleeved on the pump shaft, and the liquid throwing disc is arranged below the bearing end cover.

Preferably, a gap between the bearing seat and the matching surface of the bearing end cover is coated with sealant.

The utility model has the beneficial effects that:

1. According to the vertical pump bearing chamber sealing structure, the first V-shaped ring is adopted for sealing, and condensed water accumulated in the groove above the bearing seat is thrown out from the inclined groove in the process that the first V-shaped ring rotates along with the pump shaft;

2. According to the vertical pump bearing chamber sealing structure, the inclined groove is additionally arranged in the groove above the bearing chamber to drain water, so that the condensed water accumulated in the pump body can be prevented from penetrating into the bearing chamber;

3. According to the bearing chamber sealing structure of the vertical pump, lubricating grease can be filled in the cavity of the bearing chamber, and the whole bearing is wrapped, so that the bearing chamber is completely isolated from the outside air;

4. According to the vertical pump bearing chamber sealing structure, the second V-shaped sealing ring is additionally arranged below the bearing end cover, so that lubricating grease in the bearing chamber is prevented from leaking, and meanwhile, the liquid discharge hole is additionally provided and plugged by the screw plug, so that the lubricating grease is discharged and updated.

Drawings

FIG. 1 is a schematic structural view of a vertical pump bearing chamber seal structure of the present utility model;

FIG. 2 is a schematic view of the structure of the bearing housing of the present utility model;

FIG. 3 is a schematic view of the structure of the groove inclined groove above the bearing chamber of the vertical pump of the present utility model;

In the figure, 1, a first V-shaped sealing ring; 2. a bearing seat; 3. a pump shaft; 4. a bearing; 5. a bearing end cap; 6. a second V-shaped sealing ring; 7. a screw plug; 8. a liquid throwing disc; 9. a bearing chamber; 10. a groove; 11. an inclined groove; 12. a gap.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

In order to meet the application requirements of a low-temperature chilled water system, a novel vertical pump bearing chamber sealing structure is designed, and referring to fig. 1, the novel vertical pump bearing chamber sealing structure disclosed by the utility model is arranged on a pump shaft 3 and comprises a bearing seat 2, a bearing 4 and a bearing end cover 5, wherein a bearing chamber 9 for installing the bearing 4 is arranged in the bearing seat 2, a first V-shaped sealing ring 1 is arranged in a groove 10 above the bearing seat 2, and an inclined groove 11 which is communicated with the groove 10 and is inclined to the lower part is arranged on the bearing seat 2 (see fig. 2); a second V-shaped sealing ring 6 is arranged below the bearing end cover 5, and the first V-shaped sealing ring 1 and the second V-shaped sealing ring 6 are sleeved on the pump shaft 3. When the pump is in normal operation, when water vapor in the air is condensed above the bearing chamber 9 and then accumulated in the groove 10 in which the first V-shaped sealing ring 1 is installed, the first V-shaped sealing ring 1 rotates along with the pump shaft 3, condensed water is thrown up under the action of centrifugal force, meanwhile, due to the existence of the inclined groove 11 communicated with the groove 10 above the bearing seat 2, the thrown up condensed water flows out of the upper part of the bearing seat 2 along the inclined groove 11, so that the condensed water above the bearing seat 2 is discharged in time, and the condensed water is prevented from flowing into the bearing chamber 9.

In a specific embodiment, as shown in fig. 2 and 3, the included angle α between the inclined groove 11 and the horizontal direction is 2 ° to 5 °, so that the condensed water in the groove 10 above the bearing seat 2 is discharged through the inclined groove 11.

In order to ensure that the bearing is completely isolated from the surrounding moist air, as shown in fig. 1, the bearing chamber 9 is filled with lubricating grease, the whole bearing is wrapped, and in order to facilitate the replacement of the lubricating grease, a drain hole communicated with the bearing chamber 9 is arranged on the bearing end cover 5 below the bearing, and is blocked by a screw plug 7; when the lubricating grease needs to be replaced, the discharge and the renewal of the grease can be performed by unscrewing the screw plug 7.

With reference to fig. 1, the second V-shaped ring below the bearing end cover 5 is mainly used for preventing grease in the bearing cavity from leaking. Referring to fig. 1, the sealing structure of the vertical pump bearing chamber of the utility model further comprises a liquid throwing disc 8 sleeved on the pump shaft 3, wherein the liquid throwing disc 8 is arranged below the bearing end cover 5, and the liquid throwing disc 8 is mainly used for preventing water below from splashing into the bearing chamber 9 above; in addition, a sealant is applied to the gap 12 between the bearing housing 2 and the bearing end cap 5 to prevent condensation water from penetrating into the bearing chamber 9 from the gap 12 between the bearing housing and the bearing end cap.

In summary, the sealing structure of the bearing chamber of the vertical pump can prevent low-temperature condensed water from entering the bearing chamber, thereby avoiding the failure of normal operation of the pump caused by rust and abrasion of the bearing and meeting the requirements of a low-temperature chilled water system.

It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the utility model, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the utility model as long as they fall within the true spirit of the utility model.

Claims

1. The vertical pump bearing chamber sealing structure is arranged on a pump shaft and comprises a bearing seat, a bearing and a bearing end cover, wherein a bearing chamber for installing the bearing is arranged in the bearing seat;

2. The vertical pump bearing chamber seal structure of claim 1, wherein the inclined groove has an angle of 2 ° to 5 ° with respect to the horizontal direction.

3. The vertical pump bearing chamber sealing structure of claim 1, further comprising a liquid throwing disc sleeved on the pump shaft, wherein the liquid throwing disc is arranged below the bearing end cover.

4. The vertical pump bearing chamber sealing structure according to claim 1, wherein a gap between the bearing seat and the bearing end cover mating surface is coated with sealant.