CN104930195A - Bearing sealing structure - Google Patents

Abstract

The invention relates to a bearing sealing structure, which comprises a shaft, a static ring, a dynamic ring, an oil seal, a bearing seat, an oil injection pipe and an oil injection pump, wherein the static ring is fixed on the shaft by a fastening piece, the dynamic ring is fixed on the bearing seat by the fastening piece, labyrinth grooves are designed on the static ring, the dynamic ring and the bearing seat, and the labyrinth grooves of the static ring, the dynamic ring and the bearing seat form a labyrinth; the oil seal is arranged in an oil seal cavity formed by the bearing seat and the shaft; the shaft, the static ring, the oil seal and the bearing seat form a grease storage cavity, the grease storage cavity is communicated with the labyrinth, and the grease storage cavity is communicated with the oil seal cavity; the oiling pipe set up in non-rotating part, the fat chamber is connected to one end, the oiling pump is connected to the other end, adopts oil blanket, two-way maze and grease to fill sealed to the bearing, regularly carries out the oiling with the oiling pump, can solve self-aligning bearing oil blanket and shaft contact not in place and the mineral and corrode the sealed bad scheduling problem that brings to the sealing member, and permanent effective, no cost of maintenance.

Description

A bearing sealing structure

technical field

The invention relates to a bearing sealing structure, in particular to a bearing sealing structure used for rotating equipment in mines.

Background technique

Mining equipment, especially equipment in a slurry environment, often causes the bearings to rust, wear, and corrode due to the immersion of the slurry into the bearings, resulting in equipment shutdowns and affecting production. The sealing structure that has in the prior art adopts multiple oil seals and felt to seal. However, since most mining equipment uses self-aligning bearings, there is a coaxiality error between the shaft and the rotating parts, and the oil seal is not in place with the rotating shaft, and it is easy to enter the slag. Once the slag enters, it will accelerate the wear of the oil seal and cause the seal to fail. In addition, some slag is corrosive, and the service life of the oil seal will be very short, and it is quite troublesome to replace; some equipment uses specially designed bearings or mechanical seals, which requires greater equipment structure and higher investment costs. Not strong, and there is also a certain service life.

Contents of the invention

The purpose of the present invention is to improve and innovate on the shortcomings and problems existing in the background technology, and to provide a sealing structure which is permanently effective, simple in structure and very strong in versatility.

The technical solution of the present invention is to construct a bearing sealing structure, including shaft (1), static ring (2), moving ring (3), oil seal (4), bearing seat (5), oil injection pipe (6), oil injection pump (7).

The static ring (2) is fixed on the shaft (1) with fasteners; the moving ring (3) is fixed on the bearing seat (5) with fasteners;

The static ring (2), moving ring (3) and bearing seat (5) are all designed with labyrinth grooves, and the labyrinth grooves of the three are embedded with each other to form a labyrinth;

The oil seal (4) is arranged in the oil seal cavity formed by the bearing housing (5) and the shaft (1);

The shaft (1), static ring (2), oil seal (4) and bearing seat (5) form a grease storage chamber, the grease storage chamber communicates with the labyrinth, and the grease storage chamber communicates with the oil seal chamber;

The oil injection pipe (6) is arranged in the non-rotating part, one end is connected to the grease storage chamber, and the other end is connected to the oil injection pump (7).

In one of the embodiments, the mating surfaces of the stationary ring (2) and the shaft (1) and the mating surfaces of the moving ring (3) and the bearing seat (5) are provided with sealant, and the fasteners are screw.

In one of the embodiments, the oil injection pump (7) is a manual oil injection pump.

In one of the embodiments, the labyrinth is divided into two directions, axial and radial.

In one of the embodiments, the non-rotating part is a shaft (1), the rotating part is a bearing seat (5), and the oil injection pipe (6) is arranged in the shaft (1).

In one of the embodiments, the non-rotating part is a bearing seat (5), the rotating part is a shaft (1), and the oil injection pipe (6) is arranged in the bearing seat (5).

Advantage of the present invention and beneficial effect:

Oil seals, bidirectional labyrinths and grease filling are used to seal the bearings, and regular oil injection with an oil injection pump can solve the problems of contact between the oil seal of the self-aligning bearing and the shaft, and the poor sealing caused by the corrosion of the seal by minerals, and it is permanently effective and has no maintenance cost. .

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of the bearing structure of the present invention.

Fig. 2 is an enlarged schematic view of the sealing part of an embodiment of the bearing structure of the present invention.

In the figure: 1, shaft; 2, static ring; 3, moving ring; 4, oil seal; 5, bearing seat; 6, oil injection pipe; 7, oil injection pump.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

It should be noted that when an element is considered to be “disposed” on another element, it may be directly disposed on or connected to the other element or there may be an intervening element at the same time. The terms "bottom", "top", "end" and similar expressions are used herein for the purpose of description only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used in the description are only for describing specific implementation purposes, and are not intended to limit the present invention.

As shown in Figure 1, a bearing sealing structure includes a shaft (1), a stationary ring (2), a moving ring (3), an oil seal (4), a bearing seat (5), an oil injection pipe (6), and an oil injection pump ( 7).

It can be clearly seen from Figure 2 that the static ring (2) and the shaft (1) are fitted with a small gap, and the static ring (2) is fixed on the shaft (1) with fasteners; the moving ring (3) ) is fixed on the bearing housing (5) with fasteners;

The static ring (2), moving ring (3) and bearing seat (5) are all designed with labyrinth grooves, and the labyrinth grooves of the three are embedded with each other to form a labyrinth;

The oil seal (4) is arranged in the oil seal cavity formed by the bearing housing (5) and the shaft (1);

The shaft (1), static ring (2), oil seal (4) and bearing seat (5) form a grease storage chamber, the grease storage chamber communicates with the labyrinth, and the grease storage chamber communicates with the oil seal chamber;

The oil injection pipe (6) is set in the non-rotating part, one end is connected to the grease storage chamber, and the other end is connected to the oil injection pump (7), and the oil injection pump (7) injects grease into the grease storage chamber before the equipment is running , the lubricating grease enters the grease storage chamber and the labyrinth through the oil injection pipe (6), and is filled at one time, subject to the overflow of the lubricating oil from the labyrinth. After the grease enters the grease storage cavity, it will generate positive pressure on the auxiliary lip of the oil seal 4, so that the oil seal 4 can better contact the shaft 1. The grease enters the maze and is stored in the maze, forming a labyrinth without gaps, which can completely and effectively prevent The entry of foreign matter effectively protects the oil seal (4) and bearings.

More preferably, the mating surfaces of the stationary ring (2) and the shaft (1) and the mating surfaces of the moving ring (3) and the bearing seat (5) are provided with sealant, and the fasteners are screws.

More preferably, the oil injection pump (7) is a manual oil injection pump, and the oil injection pump is installed with the equipment, and the equipment can be permanently sealed by adding a little grease to the equipment regularly.

More preferably, the labyrinth is divided into two directions, axial and radial. A multi-directional labyrinth increases the length of the labyrinth, which can more effectively prevent the entry of foreign matter and facilitate the storage of grease.

Especially, when the non-rotating component is the shaft (1), the oil injection pipe is arranged in the shaft (1).

In particular, when the non-rotating component is a bearing seat (5), the oil injection pipe is arranged in the bearing seat (5).

The embodiments described in the present invention are only a description of the preferred implementation of the present invention, and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made should fall within the protection scope of the present invention, and the technical content claimed in the present invention has been fully recorded in the claims.

Claims (6)

1. A bearing sealing structure, including a shaft (1), a stationary ring (2), a moving ring (3), an oil seal (4), a bearing housing (5), an oil injection pipe (6), and an oil injection pump (7), and Features: The static ring (2) is fixed on the shaft (1) with fasteners; the moving ring (3) is fixed on the bearing housing (5) with fasteners; The static ring (2), moving ring (3) and bearing seat (5) are all designed with labyrinth grooves, and the labyrinth grooves of the three are embedded with each other to form a labyrinth; The oil seal (4) is arranged in the oil seal cavity formed by the bearing housing (5) and the shaft (1); The shaft (1), static ring (2), oil seal (4) and bearing seat (5) form a grease storage chamber, the grease storage chamber communicates with the labyrinth, and the grease storage chamber communicates with the oil seal chamber; The oil injection pipe (6) is arranged in the non-rotating part, one end is connected to the grease storage chamber, and the other end is connected to the oil injection pump (7). 2. A bearing sealing structure according to claim 1, characterized in that: The mating surfaces of the stationary ring (2) and the shaft (1) and the mating surfaces of the moving ring (3) and the bearing seat (5) are provided with sealant, and the fasteners are screws. 3. A bearing sealing structure according to claim 1, characterized in that: The oil injection pump (7) is a manual oil injection pump. 4. A bearing sealing structure according to claim 1, characterized in that: The labyrinth is divided into two directions, axial and radial. 5. A bearing sealing structure according to claim 1, characterized in that: The non-rotating part is the shaft (1), the rotating part is the bearing seat (5), and the oil injection pipe (6) is arranged in the shaft (1). 6. A bearing sealing structure according to claim 1, characterized in that: The non-rotating part is the bearing seat (5), the rotating part is the shaft (1), and the oil injection pipe (6) is arranged in the bearing seat (5).