CN222084968U - High-sealing turntable bearing sealing structure - Google Patents

Abstract

The application discloses a high-sealing turntable bearing sealing structure which comprises a bearing outer ring, a bearing inner ring and a bearing sealing ring, wherein stepped grooves are formed in the upper end of the bearing outer ring and the lower end of the bearing inner ring, inclined grooves are formed in the steps, third sealing baffles are arranged at the inclined positions of the stepped grooves, second sealing baffles are arranged on the upper sides of the stepped grooves of the bearing outer ring, the second sealing baffles and the third sealing baffles are respectively and correspondingly arranged with a second sealing lip and a third sealing lip on the bearing sealing ring.

Description

High-sealing turntable bearing sealing structure

Technical Field

The application relates to the technical field of bearing sealing, in particular to a high-sealing turntable bearing sealing structure.

Background

Wind power generation has gained widespread attention and application as a clean, renewable energy source. Wind power generators are key devices for realizing wind power generation, and the performance and reliability of the wind power generators are critical to the efficiency and stability of wind power generation.

The turntable bearing is one of key components in the wind driven generator, is applied to large-scale equipment such as various engineering machinery, wind driven generators, port machinery and the like, and is widely applied as a variable pitch bearing in the wind driven generator. The variable pitch bearing plays an important role in supporting and adjusting the blade angle in the wind driven generator, and the performance and reliability of the variable pitch bearing have important influence on the running efficiency and stability of the wind driven generator.

However, existing pitch bearings suffer from problems, mainly insufficient sealing performance and inability to accommodate large relative displacements and ferrule deformations. These problems cause oil leakage, falling and other faults, not only pollute equipment and surrounding environment, but also cause lubrication failure and corrosion of bearing raceways and rolling bodies, and form a great potential hazard to the service life of the bearing.

Disclosure of Invention

The application aims to overcome the existing defects, provides a high-sealing turntable bearing sealing structure, has good protective performance, ensures the sealing performance and reliability of a bearing, and can effectively solve the problems in the background technology.

In order to achieve the purpose, the high-sealing turntable bearing sealing structure comprises a bearing outer ring, a bearing inner ring and a bearing sealing ring, wherein stepped grooves are formed in the upper end of the bearing outer ring and the lower end of the bearing inner ring, the steps are all of inclined design, a third sealing baffle is arranged at the inclined position of each step, a second sealing baffle is arranged on the upper side of each stepped groove of the bearing outer ring, the second sealing baffle and the third sealing baffle are respectively and correspondingly arranged with a second sealing lip and a third sealing lip on the bearing sealing ring, sealing fixing grooves for placing the bearing sealing ring are formed in the bearing outer ring and the bearing inner ring, and a first sealing groove between the bearing outer ring and the bearing inner ring is spliced with the first sealing lip on the bearing sealing ring.

As a preferred technical solution of the present application, the first sealing lip is designed like a cone, and its lower end is narrow and its upper end is wide.

As a preferable technical scheme of the application, the end parts of the second sealing lip and the third sealing lip are both similar to an inverted triangle.

As a preferable technical scheme of the application, clamping grooves are arranged in the sealing fixing grooves, and the protruding ends of the bearing sealing rings are provided with protrusions which are clamped with the clamping grooves.

As a preferable technical scheme of the application, the bearing inner ring is arranged on the inner side of the bearing outer ring, the bearing inner ring and the bearing outer ring are not in parallel, and the bearing sealing ring is arranged at a gap of the bearing outer ring and the bearing inner ring.

The application adopts triple sealing design, forms a protective barrier through the cooperation of the first sealing lip, the second sealing lip and the third sealing lip, effectively isolates the influence of the external environment on the inside of the bearing, effectively prevents rainwater from penetrating and grease from leaking, and the design of the first sealing lip isolates the oil pressure in the bearing, reduces the pressure on the outside sealing, thereby protecting the main seal from being influenced by excessive oil pressure, and also has the decompression function, the conical-like first sealing lip design and the inverted triangle-like second sealing lip end design and the inverted triangle-like third sealing lip end design, improves the sealing effect, is convenient to install and maintain, ensures the fixity of the bearing sealing ring in the running process, and prevents the sealing failure caused by vibration or axial movement.

Drawings

FIG. 1 is a schematic diagram of the structure of the present application;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;

FIG. 3 is a schematic diagram of the present application after assembly with a seal compressed;

fig. 4 is an enlarged schematic view of the structure at B in fig. 3.

In the figure, 1 a bearing outer ring, 1-1 a first sealing groove, 1-2 a second sealing block and 1-3 a third sealing block;

2, bearing inner rings;

the sealing device comprises a bearing sealing ring, a first sealing lip 3-1, a second sealing lip 3-2, a third sealing lip 3-3, and a fixing lip 3-4;

4 sealing the fixing groove.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiment of the present application (for convenience of description and understanding, the following description will be given with the upper part of fig. 1 as the upper part). All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present application.

Referring to fig. 1-4, the application provides a high-sealing turntable bearing sealing structure, which comprises a bearing outer ring 1, a bearing inner ring 2 and a bearing sealing ring 3, wherein the upper end of the bearing outer ring 1 and the lower end of the bearing inner ring 2 are provided with step grooves, the steps of the step grooves are all of an inclined design, and the inclined positions of the step grooves are provided with third sealing blocks 1-3.

The third sealing block 1-3 and the second sealing lip 3-2 and the third sealing lip 3-3 on the bearing sealing ring 3 are correspondingly arranged.

The third sealing lip 3-3 contacts with the third sealing rainproof slope 1-3 to form a pre-tight seal, the main function of the pre-tight seal is to follow the deformation of the bearing, and certain contact is still provided under the deformation condition, the rainproof slope 1-3 has certain inclination, and the main function of the pre-tight seal is that the third sealing lip 3-3 does not have excessive friction under the condition of large sealing elastic pre-tightening amount so as to ensure reliable contact during deformation, prevent rainwater infiltration, and meanwhile, the shielding above the pre-tight seal can directly prevent the flushing of rainwater.

The upper side of the stepped groove of the bearing outer ring 1 is provided with a second sealing block 1-2, and the second sealing block 1-2 and a second sealing lip 3-2 on the bearing sealing ring 3 are correspondingly arranged.

The second sealing lip 3-2 is in contact with the second sealing stop to form a pre-tensioned seal, here a main seal, the sealing lip having a large amount of elasticity to follow the large deformation of the bearing, i.e. in the case of a large deformation there is still a sealing contact. At this time, grease leakage is mainly prevented here due to the decompression action of the first seal lip 3-1.

The bearing outer ring 1 and the bearing inner ring 2 are respectively provided with a sealing fixing groove 4 for placing the bearing sealing ring 3, and a first sealing groove 1-1 between the bearing outer ring 1 and the bearing inner ring 2 is spliced with a first sealing lip 3-1 on the bearing sealing ring 3.

The first sealing lip 3-1 contacts with the first sealing groove 1-1 to form a pre-tightening seal, and at the moment, certain isolation is formed on the oil pressure in the bearing, so that the excessive oil quantity and the oil pressure are prevented from forming pressure on the outer side seal, namely the second sealing lip and the pressure reduction are prevented.

Further, the first sealing lip 3-1 is designed like a cone, and has a narrow lower end and a wide upper end.

The structure is beneficial to the insertion of the first sealing lip 3-1 into the first sealing groove 1-1, and the sealing effect is obviously improved after the subsequent compaction.

Further, the ends of the second sealing lip 3-2 and the third sealing lip 3-3 are both similar to an inverted triangle.

Further, a clamping groove is arranged in the sealing fixing groove 4, a bulge is arranged at the bulge end of the bearing sealing ring 3, and the bulge is clamped with the clamping groove.

The design can effectively ensure that the bearing sealing ring 3 is kept fixed in the running process of the bearing, and avoid sealing failure caused by vibration or axial movement.

Further, the bearing inner ring 2 is disposed at the inner side of the bearing outer ring 1, and the bearing inner ring and the bearing outer ring are not flush, and the bearing sealing ring 3 is disposed at the gap between the bearing outer ring 1 and the bearing inner ring 2.

When the sealing device is used, the sealing ring 3 is arranged in the sealing fixing groove 4 of the bearing ring 2 through the sealing fixing lip 3-4, so that sealing is fixed, the first sealing lip 3-1 contacts with the first sealing groove 1-1 to form a pre-tightening sealing, and at the moment, a certain isolation is formed for the oil pressure in the bearing so as to reduce the oil pressure at the second sealing lip 3-2. The second sealing lip 3-2 contacts with the second sealing baffle 1-2 to form a pre-tightening seal, the pre-tightening seal is a main seal, the first sealing lip 3-1 and the second sealing lip 3-2 have larger elastic quantity to follow larger deformation of the bearing, namely, the sealing contact is still realized under the condition of larger deformation, at the moment, the oil cavity is sealed by the seal due to the decompression effect of the first sealing lip 3-1, grease leakage is prevented, the third sealing lip 3-3 contacts with the third sealing baffle 1-3 to form a pre-tightening seal, the pre-tightening seal mainly has the main effect of following the deformation of the bearing, and has certain contact under the deformation condition, the third sealing baffle 1-3 has certain inclination, and the main effect of preventing the third sealing lip 3-3 from having excessive friction under the condition of larger sealing elastic pre-tightening quantity so as to ensure reliable contact during deformation and prevent rainwater infiltration, and meanwhile, the shielding above the sealing lip can directly prevent rainwater from flushing.

Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a high seal turntable bearing seal structure, includes bearing outer lane (1), bearing inner race (2) and bearing sealing washer (3), its characterized in that, the upper end of bearing outer lane (1) and the lower extreme of bearing inner race (2) are provided with step recess, and its step all adopts the slope design, and its slope department is provided with third seal fender (1-3), the step recess upside of bearing outer lane (1) is provided with second seal fender (1-2), second seal fender (1-2) and third seal fender (1-3) respectively with second seal lip (3-2) and third seal lip (3-3) on bearing sealing washer (3) set up, all be provided with on bearing outer lane (1) and the bearing inner race (2) and place seal fixed slot (4) of bearing sealing washer (3), seal fixed lip (3-4) on bearing sealing washer (3) correspond setting with seal fixed slot (4), first seal lip (1-1) and first seal groove (1-3) between bearing outer lane (1-2) are pegged graft mutually with first seal lip (3).

2. A high-sealing rotary disk bearing sealing structure according to claim 1, wherein said first sealing lip (3-1) is of conical-like design, and has a narrow lower end and a wide upper end.

3. A high-sealing turntable bearing sealing structure according to claim 1, wherein the ends of the second sealing lip (3-2) and the third sealing lip (3-3) are both in an inverted triangle-like shape.

4. The high-sealing turntable bearing sealing structure according to claim 1, wherein clamping grooves are arranged in the sealing fixing groove (4), and protrusions are arranged on the protruding ends of the bearing sealing rings (3) and are clamped with the clamping grooves.

5. The high-sealing turntable bearing sealing structure according to claim 1, wherein the bearing inner ring (2) is arranged on the inner side of the bearing outer ring (1) and is not flush with the bearing outer ring, and the bearing sealing ring (3) is arranged at a gap between the bearing outer ring (1) and the bearing inner ring (2).