CN214698149U

CN214698149U - Sealing device for oil guide bearing of water pump and water turbine

Info

Publication number: CN214698149U
Application number: CN202120488982.9U
Authority: CN
Inventors: 周广新; 郑旭; 刘海啸; 陆倩
Original assignee: Jiangsu Aerospace Hydraulic Equipments Ltd
Current assignee: Jiangsu Aerospace Hydraulic Equipments Ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-11-12
Anticipated expiration: 2031-03-08

Abstract

A sealing device for a water pump and water turbine oil guide bearing relates to the technical field of sealing. The oil guide bearing is characterized by comprising a main shaft, wherein a sealing part, a guide bearing and an oil guide bearing which are sequentially arranged are sleeved on the main shaft, an oil filling hole and an upward air vent are formed in a bearing seat of the oil guide bearing, one end of the guide bearing is hermetically connected with a sealing device, the guide bearing and the oil guide bearing are arranged at intervals, a flexible joint sleeved outside the guide bearing is arranged between the sealing device and the oil guide bearing, and the flexible joint is hermetically connected with the sealing device and the oil guide bearing respectively. The utility model discloses a manufacturing cost is lower to fundamentally has solved because of the sealed eccentric wear, the local wear scheduling problem that the inhomogeneous results in clearance.

Description

Sealing device for oil guide bearing of water pump and water turbine

Technical Field

The utility model relates to a sealed technical field specifically is a sealing device of water pump, hydraulic turbine oil guide bearing.

Background

At present, the sealing structure of the oil guide bearing of the domestic horizontal water pump and water turbine mostly adopts the application number: 201110154169.9, the framework oil seal of the structure is simple and convenient in installation, maintenance and the like, and the horizontal water pump and the water turbine have been used for many years through the structural form.

This structure has the following disadvantages: the structure is mainly adopted in a horizontal shaft water pump and a water turbine, the clearance between the bearing and the main shaft is usually between 0.3 mm and 0.4mm, the main shaft is disturbed by self gravity and operation process, and can be pressed to be sealed, so that the sealing friction is larger than other parts, in addition, the pump shaft is longer, the precision required by sealing is difficult to ensure in the processing and installation process, eccentric wear, local wear and the like are caused, the oil guide bearing is sealed after operation for 2000h to 5000h, the dent is generated at the contact part of the main shaft and the framework oil seal lip, the sealing effect is lost, the bearing is damaged by water inflow, and the maintenance cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a water pump, water turbine oil guide bearing's sealing device can effectively solve the problem in the background art.

The technical scheme for realizing the purpose is as follows: the utility model provides a sealing device of water pump, hydraulic turbine oil guide bearing which characterized in that: the oil guide bearing is characterized by comprising a main shaft, wherein a sealing part, a guide bearing and an oil guide bearing which are sequentially arranged are sleeved on the main shaft, an oil filling hole and an upward air vent are formed in a bearing seat of the oil guide bearing, one end of the guide bearing is hermetically connected with a sealing device, the guide bearing and the oil guide bearing are arranged at intervals, a flexible joint sleeved outside the guide bearing is arranged between the sealing device and the oil guide bearing, and the flexible joint is hermetically connected with the sealing device and the oil guide bearing respectively.

Further, the sealing component adopts a framework seal and comprises a framework seal seat and a framework seal body arranged between the framework seal seat and the main shaft.

Furthermore, one end of the guide bearing, which is close to the sealing part, is provided with a flange edge, and the flange edge of the guide bearing is connected with the framework sealing seat in a sealing manner through a split bolt.

Furthermore, the oil guide bearing is arranged at the end part of the main shaft, the oil guide bearing comprises a bearing seat and a bearing bush connected between the bearing seat and the main shaft, the bearing bush and the bearing seat are connected in a locating mode through a pin, and one end, far away from the guide bearing, of the bearing seat is connected with an end cover located at the outer end of the main shaft.

Furthermore, one end of the flexible joint is connected with the framework sealing seat in a sealing mode, and the other end of the flexible joint is connected with the bearing seat of the oil guide bearing in a sealing mode.

Furthermore, the inner walls of the guide bearing and the bearing bush are provided with a Babbitt metal layer which is in contact with the main shaft, and oil in the oil guide bearing is used for lubricating the Babbitt metal layer of the guide bearing and the bearing bush with the main shaft.

Furthermore, an upward exhaust hole and a downward exhaust hole are formed in the framework sealing seat.

The utility model has the advantages that:

the utility model discloses a rely on soft flexible joint to be connected between the bearing frame of skeleton seal part and oil guide bearing, and at the direction bearing, be provided with the babbit layer that sets up with the main shaft contact on the inner wall of axle bush, seal part just can be along with the axle free movement like this, tightly "embrace" the axle, ensure that the skeleton is sealed and the axle forms even wearing and tearing all around when the axle rotates, thereby effectively solve inherent seal structure's shortcoming, realize the good life of seal part, the clean and tidy nature in power station has been improved, thereby it causes water pollution because of oil leakage to have avoided original structure.

The utility model discloses a manufacturing cost is lower to fundamentally has solved because of the sealed eccentric wear, the local wear scheduling problem that the inhomogeneous results in clearance.

Drawings

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

Detailed Description

Product structure

As shown in fig. 1, the utility model discloses a main shaft 1, the cover is equipped with seal assembly 2 who arranges from a left side right side in proper order on the main shaft 1, guide bearing 3 and oil guide bearing 4 interval arrangement, seal assembly 2 adopts the skeleton seal, including skeleton seal 2.1 and the skeleton seal 2.2 of arranging between skeleton seal 2.1 and main shaft 1, be provided with exhaust hole 2.3 up and drain hole 2.4 down on the skeleton seal 2.1, drain hole 2.4 is used for discharging the greasy dirt that gets into in skeleton seal 2.1.

One end of the guide bearing 3 close to the sealing component 2 is provided with a flange 3.1, the flange 3.1 of the guide bearing 3 is connected with the framework sealing seat 2.1 through a split bolt 5, the oil guide bearing 4 is arranged at the right end of the main shaft 1, the oil guide bearing 4 comprises a bearing seat 4.1 and a bearing bush 4.2 connected between the bearing seat 4.1 and the main shaft 1, the bearing bush 4.2 is connected with the bearing seat 4.1 through a pin 4.3 in a positioning way, and one end of the bearing seat 4.1 far away from the guide bearing 3 is connected with an end cover 4.4 positioned at the right end of the main shaft 1.

A flexible joint 6 sleeved outside the guide bearing 3 is arranged between the sealing part 2 and the oil guide bearing 4, one end of the flexible joint 6 is hermetically connected with the framework sealing seat 2.1, the other end of the flexible joint is hermetically connected with a bearing seat 4.1 of the oil guide bearing 4, and oil cavities 7 are respectively formed among the guide bearing 3, the oil guide bearing 4, the main shaft 1, the flexible joint 6, the oil guide bearing 4, the end cover 4.4 and the main shaft 1.

A bearing seat 4.1 of the oil guide bearing 4 is provided with a downward oil filling hole 4.5 and an upward vent hole 4.6, and the oil filling hole 4.5 and the vent hole 4.6 are both communicated with an oil cavity 7 of the oil guide bearing 4.

As a further explanation of the present embodiment, the babbitt metal layer 8 disposed in contact with the main shaft 1 is disposed on the inner wall of the guide bearing 3 and the bearing bush 4.2, and the oil in the oil guide bearing 4 is used for lubricating the space between the babbitt metal layer 8 of the guide bearing 3 and the bearing bush 4.2 and the main shaft 1.

The utility model discloses a rely on soft flexible joint 6 to be connected between seal part 2 and bearing frame 4.1, and at direction bearing 3, be provided with on axle bush 4.2's the inner wall with the babbit layer 8 that main shaft 1 contact set up, seal part 2 just can be along with the axle free movement like this, seal part 2 relies on direction bearing 3 to hug closely the axle tightly, ensure to form even wearing and tearing between seal part 2 and the main shaft 1 when main shaft 1 rotates, thereby effectively solve inherent seal structure's shortcoming, realize the good life of seal part, the clean and tidy nature in power station has been improved, thereby it causes water pollution because of oil leakage to have avoided original structure.

Second, application of the product

Taking a certain pump station as an example: the power station is built in 2016 and is a horizontal shaft tubular turbine unit. The unit adopts the prior oil guide bearing structure, and a large amount of oil leakage phenomenon is found after operation. After later stage transformation adopted this patent oil blanket structure, 3000 hours after the accumulation operation, unpack skeleton oil blanket part apart, did not discover the abnormal conditions, solved because of the unit shut down that the sealed eccentric wear that the primary structure leads to, compare the significantly reduced 25 ten thousand yuan with anticipated cost in the aspect of the transformation expense. Meanwhile, the advancement and the reliability of the design of the device are proved.

Claims

1. The utility model provides a sealing device of water pump, hydraulic turbine oil guide bearing which characterized in that: the oil guide bearing is characterized by comprising a main shaft, wherein a sealing part, a guide bearing and an oil guide bearing which are sequentially arranged are sleeved on the main shaft, an oil filling hole and an upward air vent are formed in a bearing seat of the oil guide bearing, one end of the guide bearing is hermetically connected with a sealing device, the guide bearing and the oil guide bearing are arranged at intervals, a flexible joint sleeved outside the guide bearing is arranged between the sealing device and the oil guide bearing, and the flexible joint is hermetically connected with the sealing device and the oil guide bearing respectively.

2. The sealing device for the oil guide bearing of the water pump and the water turbine according to claim 1, wherein: the sealing component adopts framework sealing and comprises a framework sealing seat and a framework sealing body arranged between the framework sealing seat and the main shaft.

3. The sealing device for the oil guide bearing of the water pump and the water turbine according to claim 2, wherein: and one end of the guide bearing, which is close to the sealing part, is provided with a flange edge, and the flange edge of the guide bearing is connected with the framework sealing seat in a sealing way through a split bolt.

4. The sealing device for the oil guide bearing of the water pump and the water turbine according to claim 2, wherein: the oil guide bearing is arranged at the end part of the main shaft and comprises a bearing seat and a bearing bush connected between the bearing seat and the main shaft, the bearing bush and the bearing seat are connected in a locating mode through a pin, and one end, far away from the guide bearing, of the bearing seat is connected with an end cover located at the outer end of the main shaft.

5. The sealing device of the oil guide bearing of the water pump and the water turbine according to claim 4, wherein: one end of the flexible joint is connected with the framework sealing seat in a sealing manner, and the other end of the flexible joint is connected with the bearing seat of the oil guide bearing in a sealing manner.

6. The sealing device for the oil guide bearing of the water pump and the water turbine according to claim 2, wherein: the inner walls of the guide bearing and the bearing bush are provided with a Babbitt metal layer which is in contact with the main shaft, and oil in the oil guide bearing is used for lubricating the Babbitt metal layer of the guide bearing and the bearing bush with the main shaft.

7. The sealing device for the oil guide bearing of the water pump and the water turbine according to claim 2, wherein: the framework sealing seat is provided with an upward exhaust hole and a downward exhaust hole.