CN214331469U

CN214331469U - Oil seal device for bearing chamber of boiler feed water pre-pump

Info

Publication number: CN214331469U
Application number: CN202022314120.2U
Authority: CN
Inventors: 王忠成; 王亚南
Original assignee: Zhangjiakou Power Plant Of Datang International Power Generation Co ltd
Current assignee: Zhangjiakou Power Plant Of Datang International Power Generation Co ltd
Priority date: 2020-10-17
Filing date: 2020-10-17
Publication date: 2021-10-01
Anticipated expiration: 2030-10-17

Abstract

The utility model provides an oil seal device of a bearing chamber of a boiler feed water pre-pump, which adopts a copper-tooth oil seal before improvement, an oil retaining sleeve is additionally arranged at the pump shaft position corresponding to the oil seal of the bearing chamber after improvement, an oil retaining cap is processed at the side of the oil retaining sleeve close to a bearing bush, a sealing rubber ring is arranged between the oil retaining sleeve and a shaft, and two oil retaining grooves corresponding to the oil seal are processed at the excircle of the oil retaining sleeve; the oil seal does not adopt a comb-tooth structure, but is processed with two oil-blocking grooves, and an oil return hole is arranged right below the oil seal, and the oil seal structure diagrams of the boiler feed water preposed pump bearing chamber before the first improvement and after the second improvement are shown in detail. The problem of oil leakage of the oil seal of the bearing chamber is thoroughly solved after the improvement.

Description

Oil seal device for bearing chamber of boiler feed water pre-pump

Technical Field

The utility model relates to a technical field that sound part is sealed, specific boiler feed water prepositive pump bearing room oil blanket device that says so.

Background

The oil seal of the bearing chamber of the boiler feed water pre-pump originally adopts the copper tooth oil seal, the dynamic and static clearance between the oil seal and the shaft can be reduced as much as possible in practice, but the clearance is required to exist under the existing structure, and the opportunity of oil leakage to the outside of the bearing chamber is avoided; the clearance control in the process of overhauling and installing the oil seal is not particularly ideal, and the pump can be subjected to dynamic and static rubbing due to larger clearance and large oil seepage amount or too small clearance during operation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technique provides a leading pump bearing room oil blanket device of boiler feedwater, the innovation improves the problem that the purpose thoroughly solved bearing room oil blanket oil impregnate.

In order to realize the purpose of the invention, the utility model adopts the following technical scheme: a boiler feed water pre-pump bearing chamber oil seal device comprises: after improvement, an oil blocking sleeve is additionally arranged at the position of a pump shaft corresponding to an oil seal of a bearing chamber, an oil blocking cap is processed at the side, close to a bearing bush, of the oil blocking sleeve, a sealing rubber ring is arranged between the oil blocking sleeve and the shaft, and two oil blocking grooves corresponding to the oil seal are processed on the outer circle of the oil blocking sleeve; the oil seal does not adopt a comb-tooth structure, but is processed with two oil blocking grooves, an oil return hole is arranged right below the oil seal, and the oil blocking sleeve and the oil seal are all processed by carbon steel materials.

The innovative principle of the oil seal device for the bearing chamber of the boiler feed water pre-pump is as follows: when the boiler water supply pre-pump rotates, lubricating oil with an oil ring entering the bearing bush can be squeezed out from two sides of the bearing bush after lubricating and cooling the bearing bush, an oil blocking cap on the oil blocking sleeve can block the lubricating oil from entering an oil seal oil blocking sleeve gap, the fit gap between the oil blocking sleeve and the shaft is sealed by a sealing rubber ring, a small amount of lubricating oil splashed into a radial gap between the oil seal and the oil blocking sleeve can be collected through two oil blocking grooves on the excircle of the oil blocking sleeve, the lubricating oil is thrown into the oil blocking grooves corresponding to the oil seals under the two oil blocking grooves of the oil seals due to the action of rotating centrifugal force, oil return holes are formed in the two oil blocking grooves, and the lubricating oil can flow into a bearing chamber along the oil return holes, so that the lubricating oil cannot leak out of the bearing chamber along a pump shaft.

The key factors of the sealing of the oil sealing device of the bearing chamber of the boiler feed water pre-pump are as follows: an oil blocking cap is used for blocking a large amount of lubricating oil from going to a radial gap between the oil seal and the oil blocking sleeve, and an oil blocking groove is used for blocking the lubricating oil from leaking outside along the axial bearing of the pump.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: 01 ', a shaft bush seat, 02', a belt oil ring, 03 ', a pump shaft, 04', a bearing bush, 05 ', a bearing bush gland, 06', an oil seal, 07 ', an oil return hole, 08', an oil retaining sleeve, 09 ', a rubber ring and 10' jackscrews.

Detailed Description

For better understanding of the technical solution of the device of the present invention, the following describes the device in detail with reference to the accompanying drawings.

As shown in figure 1, the bearing seat and the bearing bush gland are ensured not to be changed, the relative sizes of an oil seal groove of the bearing seat and a pump shaft are measured and mapped, and an oil seal and an oil retaining sleeve are processed. An oil blocking cap is processed on one side of the oil blocking sleeve to block lubricating oil, a jackscrew hole is processed on the other side of the oil blocking sleeve to fix the position of the oil blocking sleeve, a sealing gasket groove is processed on an inner hole of the oil blocking sleeve, and two oil blocking grooves are processed on an outer circle of the oil blocking sleeve; the oil seal adopts a two-way oil resistance groove structure, the oil seal is processed into two half structures which are convenient to install, an oil return hole with the diameter of 3 mm is drilled under the lower half oil seal, and the oil seal and the oil baffle sleeve are processed by carbon steel materials.

Claims

1. The utility model provides a leading pump bearing room oil blanket device of boiler feedwater, includes the axle bush seat, takes the oil ring, the pump shaft, the axle bush gland, the oil blanket, the oil gallery, the oil spacer sleeve, the rubber ring, the jackscrew, its characterized in that: an oil blocking sleeve is additionally arranged at the position of a pump shaft corresponding to an oil seal of a bearing chamber, an oil blocking cap is processed at the side, close to a bearing bush, of the oil blocking sleeve, a sealing rubber ring is arranged between the oil blocking sleeve and the shaft, and two oil blocking grooves corresponding to the oil seal are processed on the outer circle of the oil blocking sleeve; an oil return hole is arranged right below the oil seal.