Oil seal structure of fan bearing seat

Abstract

The utility model discloses a fan bearing seat oil seal structure which comprises a movable ring and a static ring, an end cover is fixed at one end, far away from the movable ring, of the static ring, an annular clamping groove is formed in the inner ring wall of one side, far away from the movable ring, of the static ring, an opening type framework oil seal is arranged in the annular clamping groove, and the end cover is arranged on the outer side of the opening type framework oil seal. The end cover is fixedly connected with the outer wall of the static ring; a plurality of first blades are evenly fixed to the outer ring wall of the movable ring in the circumferential direction of the movable ring. The impeller has the advantages that in the process that the movable ring rotates along with the rotating shaft of the impeller under the cooperation of the first blade and the second blade, lubricating oil can be thrown into the oil cavity to serve as a first-stage oil baffle structure of the lubricating oil, the first annular oil return groove and the second annular oil return groove serve as a second-stage oil baffle structure of the lubricating oil, and the open type framework oil seal serves as a third-stage oil baffle; the leakage of lubricating oil is reduced, sufficient lubricating oil in the oil cavity in the bearing seat is ensured, the problems of abrasion and high temperature of internal parts are reduced, and the service life of the bearing seat is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing seats, in particular to an oil seal structure of a fan bearing seat. Background Art

[0002] The lubrication effect between the bearing and the impeller shaft is ensured by lubricating oil in the fan bearing seat, which prolongs the service life of the bearing seat. At present, the oil seal structure mostly adopts the mechanical seal form of dynamic and static rings. The dynamic and static ring sealing principle refers to a sealing structure that combines the dynamic ring on the rotating shaft with the bearing seat, the outer shell, and the uniform static ring in a special geometric shape. When axial movement occurs on the shaft, the dynamic ring protrudes outward and presses the contact parts of the shape corresponding to the inside and outside of the static ring, so that these contact parts become tight, forming a complete sealing structure, and blocking the lubricating oil in the oil cavity of the fan bearing seat.

[0003] Mechanical oil seals will become loose after long-term operation. Collision and friction between the dynamic ring and the static ring and the rotating shaft will cause the clearance to be too large, resulting in failure of the sealing performance of the oil seal. Lubricating oil leakage will aggravate the wear of internal parts, cause high temperature of the bearing, shorten the life of the bearing seat, and fail to meet the use requirements. Utility Model Content

[0004] The utility model aims to provide an oil seal structure for a fan bearing seat.

[0005] The utility model is implemented by the following technical scheme: a fan bearing seat oil seal structure, which includes a dynamic ring and a static ring, the dynamic ring and the static ring are slidably matched, an end cover is fixed to the end of the static ring away from the dynamic ring, an annular groove is opened on the inner ring wall of the static ring away from the dynamic ring, an open skeleton oil seal is arranged in the annular groove, an end cover is arranged on the outer side of the open skeleton oil seal, and the end cover is fixedly connected to the outer wall of the static ring;

[0006] A plurality of first blades are evenly fixed on the outer ring wall of the moving ring along the circumferential direction thereof.

[0007] Furthermore, a plurality of second blades are evenly fixed along the circumferential direction of the outer wall of the moving ring on a side away from the stationary ring.

[0008] Furthermore, a plurality of first annular oil return grooves are provided on the inner ring wall of the dynamic ring.

[0009] Furthermore, at least one second annular oil return groove is provided on the inner ring wall of the stationary ring.

[0010] Furthermore, an annular flange is provided on the stationary ring above the annular groove, and a clamping piece matching the annular flange is fixed on the side of the end cover close to the stationary ring, and the clamping piece includes two parallel upper clamping rings and lower clamping rings, the upper clamping ring is in movable contact with the outer annular wall of the annular flange, and the lower clamping ring is in movable contact with the inner annular wall of the annular flange.

[0011] Furthermore, the annular flange is connected to the end cover by bolts.

[0012] The utility model has the advantages that when the first blade and the second blade cooperate with the moving ring to rotate with the impeller shaft, the lubricating oil can be thrown into the oil cavity, which serves as a primary oil baffle structure for the lubricating oil, thereby reducing the lubricating oil from entering the oil baffle side formed by the moving ring and the stationary ring;

[0013] The first annular oil return groove and the second annular oil return groove serve as a secondary oil retaining structure for the lubricating oil, further assisting the primary oil retaining structure to recover the lubricating oil;

[0014] An open skeleton oil seal is arranged in the annular groove, and an end cover is arranged on the outside of the open skeleton oil seal, which is fixedly connected to the outer wall of the static ring. The open skeleton oil seal is used as a three-stage oil block. The open skeleton oil seal is closely matched with the rotating shaft of the impeller to block the lubricating oil in the bearing seat. At the same time, the end cover facilitates the replacement of the open skeleton oil seal.

[0015] With the cooperation of the primary oil baffle structure, the secondary oil baffle structure and the tertiary oil baffle structure, an effective oil seal is achieved, the leakage of lubricating oil is reduced, sufficient lubricating oil is ensured in the oil cavity of the bearing seat, the wear and high temperature problems of internal parts are reduced, and the service life of the bearing seat is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a side sectional view of the utility model;

[0019] Figure 3 An assembly drawing of the utility model;

[0020] Figure 4 for Figure 3 A is a partial enlarged schematic diagram;

[0021] In the figure: a dynamic ring 1, a static ring 2, a first blade 3, a second blade 4, a rotating shaft 5, a first annular oil return groove 6, a second annular oil return groove 7, an end cover 8, an annular groove 9, an open skeleton oil seal 10, annular flange 11, a clamping piece 12, an upper clamping ring 121, a lower clamping ring 122, and a bolt 13. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-4 As shown, the fan bearing seat oil seal structure includes a dynamic ring 1 and a static ring 2. The dynamic ring 1 and the static ring 2 are slidably matched. A plurality of first blades 3 are evenly fixed on the outer ring wall of the dynamic ring 1 along its circumferential direction. A plurality of second blades 4 are evenly fixed on the outer wall of the dynamic ring 1 away from the static ring 2 along its circumferential direction. In the process that the dynamic ring 1 cooperates with the first blades 3 and the second blades 4 to rotate following the rotating shaft 5 of the impeller, the lubricating oil can be thrown into the oil chamber, which serves as a primary oil baffle structure for the lubricating oil, thereby reducing the lubricating oil entering the oil baffle side formed by the dynamic ring 1 and the static ring 2.

[0024] A plurality of first annular oil return grooves 6 are provided on the inner ring wall of the dynamic ring 1, and at least one second annular oil return groove 7 is provided on the inner ring wall of the static ring 2. The first annular oil return grooves 6 and the second annular oil return grooves 7 serve as secondary oil baffle structures for the lubricating oil, further assisting the primary oil baffle structure in recovering the lubricating oil.

[0025] An end cover 8 is fixed to the end of the static ring 2 away from the dynamic ring 1, and an annular groove 9 is opened on the inner ring wall of the static ring 2 away from the dynamic ring 1. An open skeleton oil seal 10 is arranged in the annular groove 9, and an end cover 8 is arranged on the outer side of the open skeleton oil seal 10. The end cover 8 is fixedly connected to the outer wall of the static ring 2. The open skeleton oil seal 10 serves as a three-stage oil block. The open skeleton oil seal 10 is closely matched with the rotating shaft 5 of the impeller to block the lubricating oil in the bearing seat. At the same time, the end cover 8 facilitates the replacement of the open skeleton oil seal 10.

[0026] An annular flange 11 is provided on the stationary ring 2 above the annular groove 9, and a clamping piece 12 matching the annular flange 11 is fixed on the side of the end cover 8 close to the stationary ring 2. The clamping piece 12 includes two upper clamping rings 121 and a lower clamping ring 122 arranged in parallel. The upper clamping ring 121 is in active contact with the outer ring wall of the annular flange 11, and the lower clamping ring 122 is in active contact with the inner ring wall of the annular flange 11. When installing the end cover 8, the end cover 8 can be hung on the clamping piece 12, and the clamping piece 12 can be used to provide auxiliary support for the end cover 8. The annular flange 11 is connected to the end cover 8 by bolts 13. One person can complete the disassembly and assembly of the end cover 8, which saves manpower, facilitates the replacement of the end cover 8, and increases the stability of the cooperation between the end cover 8 and the stationary ring 2.

[0027] With the cooperation of the primary oil baffle structure, the secondary oil baffle structure and the tertiary oil baffle structure, an effective oil seal is achieved, the leakage of lubricating oil is reduced, sufficient lubricating oil is ensured in the oil cavity of the bearing seat, the wear and high temperature problems of internal parts are reduced, and the service life of the bearing seat is extended.

[0028] The specific operation process of this embodiment is as follows:

[0029] During use, the moving ring 1 rotates with the impeller shaft 5, so that the first blade 3 and the second blade 4 on the moving ring 1 rotate with the moving ring 1. Under the action of centrifugal force, the lubricating oil is thrown to the side away from the impeller shaft 5, reducing the gap between the moving ring 1 and the impeller shaft 5 for the lubricating oil to enter;

[0030] At the same time, under the action of the first annular oil return groove 6 of the dynamic ring 1 and the second annular oil return groove 7 of the static ring 2, the lubricating oil is further recovered, and oil leakage is prevented while ensuring lubrication, thereby ensuring the normal operation of the machine equipment;

[0031] Even if a small amount of lubricating oil enters the side of the stationary ring 2, under the action of the open skeleton oil seal 10 and the end cover 8, the open skeleton oil seal 10 is in close contact with the rotating shaft 5 of the impeller, effectively preventing the lubricating oil from leaking.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan bearing seat oil seal structure, comprising a dynamic ring and a static ring, wherein the dynamic ring and the static ring are slidably matched, characterized in that: An end cap is fixed to one end of the static ring away from the dynamic ring, an annular groove is provided on the inner ring wall of the static ring away from the dynamic ring, an open skeleton oil seal is provided in the annular groove, an end cap is provided on the outer side of the open skeleton oil seal, and the end cap is fixedly connected to the outer wall of the static ring; A plurality of first blades are evenly fixed on the outer ring wall of the moving ring along the circumferential direction thereof.

2. The fan bearing seat oil seal structure according to claim 1, characterized in that: A plurality of second blades are evenly fixed on the outer wall of the moving ring at a side away from the stationary ring along the circumferential direction thereof.

3. The fan bearing seat oil seal structure according to claim 2, characterized in that: A plurality of first annular oil return grooves are provided on the inner ring wall of the dynamic ring.

4. The fan bearing seat oil seal structure according to claim 3, characterized in that: At least one second annular oil return groove is provided on the inner ring wall of the stationary ring.

5. The fan bearing seat oil seal structure according to claim 4, characterized in that: An annular flange is provided on the stationary ring above the annular groove, and a clamping piece matching the annular flange is fixed on the side of the end cover close to the stationary ring. The clamping piece includes two parallel upper clamping rings and lower clamping rings. The upper clamping ring is in movable contact with the outer annular wall of the annular flange, and the lower clamping ring is in movable contact with the inner annular wall of the annular flange.

6. The fan bearing seat oil seal structure according to claim 5, characterized in that: The annular flange is bolted to the end cover.

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