CN202867854U

CN202867854U - Sliding bearing with combined type sealing structure

Info

Publication number: CN202867854U
Application number: CN 201220471860
Authority: CN
Inventors: 胡瑞光; 张远海
Original assignee: SHANGHAI SHENKE SLIDE BEARING Corp
Current assignee: SHANGHAI SHENKE SLIDE BEARING Corp
Priority date: 2012-09-14
Filing date: 2012-09-14
Publication date: 2013-04-10
Anticipated expiration: 2022-09-14

Abstract

The utility model discloses a sliding bearing with a combined type sealing structure. The sliding bearing with the combined type sealing structure comprises a bearing seat. A bearing bush is arranged in the bearing seat. End covers are respectively arranged at the two ends of the bearing seat. Each end cover is provided with at least one pair of maze sealing rings. Sealing cavities are formed between the maze sealing rings, and are formed in the inner walls of the end covers. The sealing cavities are communicated with oil return holes which are formed in end covers and the bearing seat. Inlet ends of the oil return holes are connected with the sealing cavities, and outlet ends of the oil return holes are communicated with the interior of the bearing seat. Oil collecting cavities are formed in the oil return holes, and the positions of the oil collecting cavities are lower than the inlet ends and the outlet ends of the oil return holes. In the process of working, oil drops formed by condensing oil mist are filled into the oil collecting cavities completely to prevent the oil mist produced in the bearing seat to overflow along the oil return holes. Barotropic ventholes are formed in the end covers, and are communicated with the sealing cavities. The barotropic ventholes are communicated with barotropic breather pipes, and barotropic gas is guided into the barotropic breather pipes. A sealing strip is arranged between each end cover and the bearing seat, and seals a gap between each end cover and the bearing seat to prevent oil mist from leaking.

Description

A kind of sliding bearing with combined seal structure

Technical field

The utility model relates to sliding bearing, relates in particular to Combined Labyrinth sealing used in the sliding bearing.

Background technique

Sealing is indispensable important component part in the sliding bearing, can prevent that foreign matter from entering bearing inside, and bearing inside is polluted, and affects the usability of bearing, and prevents from polluting external environment condition outside bearing internal lubrication oil, the mist of oil effusion bearing.Generally, sliding bearing adopts the seal form such as labyrinth, felt, packing more.Felt, packing_seal allow the linear velocity used less, and working life is lower; The existing labyrinth seal structure of sliding bearing is fairly simple, the phenomenon of leakage of oil often occurs.

The model utility content

The purpose of this utility model provides a kind of sliding bearing with combined seal structure, to prevent the problem of bearing seal leakage of oil, improves the working life of sealing.

The utility model is that the technological scheme that its technical problem of solution adopts is,

A kind of sliding bearing with combined seal structure, include bearing support, have bearing shell in the bearing support, the bearing support two ends are respectively equipped with end cap, are equipped with at least one pair of labyrinth seal in each end cap, has Seal cage between the labyrinth seal, the sealing chamber is formed at the end cap inwall, and Seal cage is communicated with spill port, and this spill port is formed in end cap and the bearing support, the entry end of spill port is connected with Seal cage, its outlet end and bearing support internal communication;

Have collection chamber in the described spill port, the position of this collection chamber is lower than entrance point and the outlet end of spill port, and during work, the oil droplet that is condensed into by mist of oil is full of collection chamber, thereby the mist of oil that prevents the inner generation of bearing support is overflowed along spill port;

Described end cap is provided with the positive airway pressure hole, and this positive airway pressure hole is communicated with Seal cage, and place, positive airway pressure hole access positive airway pressure pipe passes into barotropic gas;

Be provided with Stamping Steel Ribbon between described end cap and the bearing support, with the gap sealing between end cap and the bearing support, prevent that mist of oil from leaking.

The utility model has the advantage of that this sliding bearing is directly offered spill port in end cap and bearing support, saved external oil returning tube, can reduce production costs, reduce fault, the mode lift-off seal effect that adopts multiple seal approach to combine.

Description of drawings

Fig. 1 is the structural representation of the Combined Labyrinth sealing that the utility model proposes;

Fig. 2 is the amplification close up view at A place among Fig. 1.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose with effect is easy to understand, below in conjunction with illustrating and specific embodiment, further set forth the utility model.

As shown in Figure 1 and Figure 2, the sliding bearing with combined seal structure that the utility model proposes includes bearing support 1, has bearing shell 2 in the bearing support 1, the two ends of bearing support 1 are respectively equipped with end cap 3, be provided with labyrinth seal 311 and 312 in the end cap 3, has Seal cage 32 between the labyrinth seal 311 and 312, Seal cage 32 is formed at the inwall of end cap 3, Seal cage 32 is communicated with spill port 33, spill port 33 is formed in end cap 3 and the bearing support 1, the entry end of spill port 33 is connected with Seal cage 32, the internal communication of its outlet end and bearing support 1; Have collection chamber 331 in the spill port 33, the position of collection chamber 331 is lower than entrance point and the outlet end of spill port 33, and during work, the oil droplet that is condensed into by mist of oil is full of collection chamber 331, thereby prevents that the bearing support 1 inner mist of oil that produces is along spill port 33 effusions; End cap 3 is provided with positive airway pressure hole 34, and positive airway pressure hole 34 is communicated with Seal cage 32, and 34 places, positive airway pressure hole access positive airway pressure pipe passes into barotropic gas; Be provided with Stamping Steel Ribbon 35 between end cap 3 and the bearing support 1, with the gap sealing between end cap 3 and the bearing support 1, prevent that mist of oil from leaking.

Be little clearance seal between labyrinth seal in the end cap and the axle, avoid contacting with rotor, can allow under large linear velocity, to use, improved the working life of sealing.Bearing support is inner during work can produce mist of oil because of factors such as rotor rotation, oil temperature risings.Junction plane place at end cap and bearing support arranges rubber weather strip, and rubber weather strip can stop mist of oil or oil leak to be gone out; At axial direction, labyrinth seal makes the mist of oil or the lubricant oil that pass through produce whirlpool, increases flow resistance, reduces flowing pressure, prevents mist of oil and oil leak.Be provided with the twice labyrinth seal in the end cap, the lubricant oil of effusion first labyrinth seal enters in the Seal cage of end cap inwall, then flow back in the bearing support by the spill port of opening on end cap bottom and bearing support, prevents that it from leaking; Mist of oil by the first labyrinth seal owing to reasons such as volume increase, temperature reductions, condenses into oil droplet after entering Seal cage, finally flow back in the bearing chamber by the spill port on end cap bottom and the bearing support.The second labyrinth seal of end cap can play and prevent the mist of oil that does not condense and stick to the effect that lubricant oil leaks on the axle, prevents that simultaneously outside foreign material from entering bearing support inside and polluting.During work, be full of the lubricant oil of backflow in the collection chamber, the mist of oil that prevents the inner generation of bearing support is overflowed along spill port, be reserved with the positive airway pressure hole on the end cap simultaneously, when labyrinth seal can not satisfy seal request, at place, positive airway pressure hole access positive airway pressure pipe, pass into barotropic gas, to realize better sealing effect.

More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. sliding bearing with combined seal structure, include bearing support, have bearing shell in the bearing support, the bearing support two ends are respectively equipped with end cap, it is characterized in that, be equipped with at least one pair of labyrinth seal in each end cap, have Seal cage between the labyrinth seal, the sealing chamber is formed at the end cap inwall, Seal cage is communicated with spill port, this spill port is formed in end cap and the bearing support, and the entry end of spill port is connected with Seal cage, its outlet end and bearing support internal communication.

2. a kind of sliding bearing with combined seal structure according to claim 1 is characterized in that having collection chamber in the described spill port, and the position of this collection chamber is lower than entrance point and the outlet end of spill port.

3. a kind of sliding bearing with combined seal structure according to claim 1 is characterized in that described end cap is provided with the positive airway pressure hole, and this positive airway pressure hole is communicated with Seal cage, place, positive airway pressure hole access positive airway pressure pipe.

4. a kind of sliding bearing with combined seal structure according to claim 1 is characterized in that, is provided with Stamping Steel Ribbon between described end cap and the bearing support, with the gap sealing between end cap and the bearing support.