CN210196053U

CN210196053U - Independent oil cavity sealing structure of submersible electric pump

Info

Publication number: CN210196053U
Application number: CN201921257450.3U
Authority: CN
Inventors: Lei Chang; 常磊; Ming Zhou; 周明; Fei Tian; 田飞; Can Luo; 罗灿; Xiongfa Gao; 高雄发
Original assignee: Asia Pacific Pump Valve Co Ltd
Current assignee: Asia Pacific Pump Valve Co Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-03-27
Anticipated expiration: 2029-08-06

Abstract

The utility model relates to an independent oil pocket seal structure of submerged motor pump, including the shell, upper and lower rotating ring, upper and lower quiet ring, the transmission cover, upper and lower clamp plate, the shell cup joints on the charge pump main shaft, the upper and lower casing inner wall of shell is equipped with upper and lower quiet ring support boss inwards respectively, the outside of upper and lower quiet ring is supported respectively through O type circle on upper and lower quiet ring support boss, the inboard of upper and lower quiet ring is compressed tightly through O type circle through upper and lower clamp plate fixed connection on the upper and lower inner wall of shell respectively, pass through bolt fixed connection transmission cover on the charge pump main shaft between upper and lower quiet ring, establish upper and lower rotating ring seat in the cavity between transmission cover inner wall and charge pump main shaft, support tight multiunit along the axial spring of charge pump between upper and lower rotating ring seat, upper and lower rotating ring seat are outwards supported respectively through O type circle and are set up in the transmission cover upper and lower rotating ring, upper and lower rotating ring is supported tightly outward respectively, And (4) a lower stationary ring. The structure is compact, the assembly and the use are convenient, and the lubricating and sealing effects are good.

Description

Independent oil cavity sealing structure of submersible electric pump

Technical Field

The utility model relates to a seal structure, the independent oil pocket seal structure of submerged motor pump specifically says so.

Background

When the submerged motor pump is designed, the submerged motor pump needs to prevent a conveying medium from entering a motor cavity through a mechanical sealing part, an oil chamber filled with mechanical oil is designed in the prior art for ensuring the normal use of mechanical sealing, a single mechanical seal or a plurality of mechanical seals are matched for use, an oil film is formed on a friction surface of a moving ring and a static ring and can be fully lubricated, and meanwhile, the transmission and the diffusion of friction pair heat are ensured. The volume of the oil chamber of the submersible electric pump is large, and particularly, the volume of the oil chamber is large when the submersible shaft mixed flow pump is designed, so that a large amount of mechanical oil is wasted, the structure is large, the assembly performance is poor, and the reliability is reduced.

Still adopt double mechanical seal structure among the prior art, the quiet ring of its outer end contacts with the transport medium, and the quiet ring of this end receives certain thrust opposite with spring force direction under the medium pressure effect, and if thrust is greater than the backpressure of spring for a long time, the quiet seal at quiet ring position became invalid to lead to carrying the medium to get into seal structure, the seal structure inner moves, quiet ring easily receives the damage and leads to revealing, sealed inefficacy.

Disclosure of Invention

To the above-mentioned problem among the prior art, the utility model provides a compact structure, it is convenient to assemble and use, and the independent oil pocket seal structure of the sealed effectual submerged motor pump of lubrication.

The utility model adopts the technical proposal that: the sealing structure comprises a shell, an upper rotating ring, a lower rotating ring, an upper static ring, a lower static ring, a transmission sleeve, an upper pressing plate and a lower pressing plate, wherein the shell is sleeved on a main shaft of an electric pump, the inner walls of the upper shell and the lower shell of the shell are respectively provided with an inward upper static ring supporting boss and an inward lower static ring supporting boss, the outer sides of the upper static ring and the lower static ring are respectively supported on the upper static ring supporting boss and the lower static ring supporting boss through O-shaped rings, the inner sides of the upper static ring and the lower static ring are respectively pressed through the upper pressing plate and the lower pressing plate which are fixedly connected on the upper inner wall and the lower inner wall of the shell through the O-shaped rings, the transmission sleeve is fixedly connected on the electric pump main shaft between the upper static ring and the lower static ring through bolts, an upper rotating ring seat and a lower rotating ring seat are arranged in a cavity between the inner wall of the transmission sleeve and the electric pump main shaft, a plurality of springs along the axial direction of the electric pump are tightly supported between the, And (4) a lower stationary ring.

The shell comprises an upper shell cover plate and a lower shell cavity, wherein the upper static ring supporting boss and the lower static ring supporting boss are respectively arranged on the upper shell cover plate and the lower shell cavity, and the upper shell cover plate is locked and connected on the end cover of the supporting bearing of the electric pump main shaft through a plurality of screws.

The upper and lower movable ring seats are tightly propped against a spring which is sleeved on the electric pump main shaft along the axial direction of the electric pump main shaft.

The shell is filled with lubricating oil.

The utility model discloses mechanical seal structure designs into an independent structure who contains auxiliaries such as quiet ring seat, shell, rotating ring, quiet ring, through upper cover plate connection bearing end cover, how much of the interior packing lubricating oil of shell is relevant with the size of mechanical seal itself, and is irrelevant with the structure of water pump, but the quantity of greatly reduced mechanical seal lubricating oil, to the heat of its friction pair production can be by grease chamber peripheral endless medium transmission and diffusion, reduce the manufacturing cost of water pump and improve product reliability.

The upper and lower pressing plates are additionally arranged on the upper and lower static rings and are connected with the O-shaped rings in a pressing mode and pressed in the upper shell cover plate and the lower shell cavity, so that the problems of sealing damage and failure caused by long-term medium pressure bearing of the traditional static ring are effectively solved;

the utility model discloses two terminal surface mechanical seal have independent monolithic structure, and mechanical seal's performance no longer receives installer technical merit's restriction, and the influence of the accumulative total machining error of water pump part, and the quality is more reliable, and the mechanism is compact, easily assemble, easily forms universalization modularization part, and the range of application increases, can practice thrift use cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a usage state diagram of the present invention.

In the figure, an electric pump main shaft 1, a lower end cover 2, a bearing end cover 3, an upper shell cover plate 4, a lower cavity 5, an upper static ring support boss 6, a lower static ring support boss 7, an O-shaped ring 8, an upper static ring 9, a lower static ring 10, an upper pressure plate 11, a lower pressure plate 12, a transmission sleeve 13, an upper movable ring seat 14, a lower movable ring seat 15, a spring 16, an upper movable ring 17 and a lower movable ring 18.

Detailed Description

The following further description is made in conjunction with the accompanying drawings and examples.

Shown in FIGS. 1 and 2: an independent oil cavity sealing structure of a submersible electric pump comprises an upper shell cover plate 4, a lower shell cavity 5, an upper static ring supporting boss 6, a lower static ring supporting boss 7, an O-shaped ring 8, an upper static ring 9, a lower static ring 10, an upper pressure plate 11, a lower pressure plate 12, a transmission sleeve 13, an upper movable ring seat 14, a lower movable ring seat 15, a spring 16, an upper movable ring 17 and a lower movable ring 18.

An upper shell cover plate 4 and a lower shell cavity 5 are locked by a flange edge through screws and are integrally connected to the lower part between a bearing end cover 3 and a lower end cover 2 of an electric pump main shaft 1 through the upper shell cover plate 4, the lower shell cover plate 4 and the lower shell cavity 5 are connected on the electric pump main shaft 1 in a penetrating way, the inner cavities of the upper shell cover plate 4 and the lower shell cavity 5 are filled with lubricating oil, the upper shell cover plate 4 and the lower shell cavity 5 are respectively provided with an inward upper static ring supporting boss 6 and an inward lower static ring supporting boss 7, the outer sides of an upper static ring 9 and a lower static ring 10 are respectively supported on the upper static ring supporting boss 6 and the lower static ring supporting boss 7 through an O-shaped ring 8, the inner sides of the upper static ring 9 and the lower static ring 10 are respectively pressed by an upper electric pump and a lower electric pump 11 and 12 which are fixedly connected on the inner wall of the upper static ring 9 and the lower static ring 10 through bolts, a transmission sleeve 13 is fixedly connected on the electric pump main shaft between the upper static ring 9 and the lower static ring 10, an, the upper and lower moving ring seats 14 and 15 are supported outwards from the back by O-shaped rings respectively to form an upper and a lower moving rings 17 and 18 in the transmission sleeve, and the upper and the lower moving rings respectively abut against the upper and the lower static rings outwards.

Claims

1. The utility model provides an independent oil pocket seal structure of submerged motor pump, includes shell, upper and lower rotating ring, upper and lower quiet ring, driving sleeve, its characterized in that: the upper and lower static rings are fixedly connected with a transmission sleeve through a bolt, an upper and lower dynamic ring seat is arranged in a cavity between the inner wall of the transmission sleeve and the main shaft of the electric pump, a plurality of groups of springs along the axial direction of the main shaft of the electric pump are tightly supported between the upper and lower dynamic ring seats, the upper and lower dynamic ring seats are oppositely arranged outwards and respectively supported on the upper and lower static rings through the O-shaped rings.

2. The sealing structure for the independent oil chamber of the submersible electric pump according to claim 1, wherein: the shell comprises an upper shell cover plate and a lower shell cavity, wherein the upper static ring supporting boss and the lower static ring supporting boss are respectively arranged on the upper shell cover plate and the lower shell cavity, and the upper shell cover plate is locked and connected on the end cover of the supporting bearing of the electric pump main shaft through a plurality of screws.

3. The sealing structure for the independent oil chamber of the submersible electric pump according to claim 1, wherein: the upper and lower movable ring seats are tightly propped against a spring which is sleeved on the electric pump main shaft along the axial direction of the electric pump main shaft.

4. The sealing structure for the independent oil chamber of the submersible electric pump according to any one of claims 1 to 3, characterized in that: the shell is filled with lubricating oil.