CN201610894U

CN201610894U - Turntable bearing for wind generator

Info

Publication number: CN201610894U
Application number: CN2009203170808U
Authority: CN
Inventors: 许正根; 李媛媛; 戴天任
Original assignee: Luoyang Bearing Science and Technology Co Ltd
Current assignee: Luoyang Bearing Science and Technology Co Ltd
Priority date: 2009-12-10
Filing date: 2009-12-10
Publication date: 2010-10-20
Anticipated expiration: 2019-12-10

Abstract

The utility model discloses a turntable bearing for a wind generator, comprising an inner ball race, an outer ball race and steel balls clamped between the opposed periphery surfaces of inner and outer ball races, a first end face of the inner ball race is protruded on a first end face of the outer ball race, a second end face of the inner ball race is arranged under a second end face of the outer ball race, a first double-lip sealing ring is assembled between the outer circumferential surface of the inner ball race adjacent to the first end face and the corresponding inner circumferential surface of the outer ball race, a second double-lip sealing ring is assembled between the inner circumferential surface of the outer ball race adjacent to the second end face and the corresponding outer circumferential surface of the inner ball race. According to the utility model, the upper portion and the lower part of the bearing are sealed in a double-lip contact mode, even the outside seal of the bearing is exposed out in the field, the better dust-proof, water-proof, aging-proof and anti-falling effect can be achieved.

Description

The wind-driven generator turntable bearing

Technical field

The utility model relates to a kind of large-scale turntable bearing, is mainly used in the wind-driven generator pitching system.

Background technique

The turntable bearing that becomes the slurry system is the critical component of wind-driven generator pitching system.It is installed on the root of blade, is used for accurately in time adjusting the angle of facining the wind of blower fan.This turntable bearing is worked in the high altitude environment throughout the year in the open air, and working condition is abominable, requires the turntable bearing of pitch-controlled system to have enough intensity and bearing capacity, operates steadily, high reliability, long lifetime lubricated, anticorrosion and favorable sealing property.

The model utility content

The purpose of this utility model be to provide a kind of good airproof performance, operate steadily be used for the turntable bearing that wind-driven generator becomes the slurry system.

The technical solution of the utility model is: a kind of wind-driven generator turntable bearing, comprise bearing inner race, bearing outer ring and be folded in steel ball between the relative side face of the inside and outside circle of bearing, first end face of bearing inner race is convexly set in more than bearing outer ring first end face, and second end face of bearing inner race is heavy to be located at below bearing outer ring second end face; Be equipped with first double-lip sealing ring between near first end face of bearing inner race outer circumferential face and the corresponding bearing outer ring inner peripheral surface, be extended with set identical cooperation of arc convex on the symmetrical lip limit of separating gradually the outer end and the described bearing inner race outer circumferential face to its inside on the inner peripheral surface of first double-lip sealing ring; Be equipped with second double-lip sealing ring between near second end face of bearing outer ring inner peripheral surface and the corresponding bearing inner race outer circumferential face, be extended with set identical cooperation of arc convex on the symmetrical lip limit of separating gradually the outer end and the described bearing inner race to its outside on the outer circumferential face of second double-lip sealing ring.

Convex with the axial limiting projection on another side face of described first and second double-lip sealing ring with respect to place, lip limit side face, convex with radially spacing hangnail on the end face of the close axial limiting projection of first and second double-lip sealing ring, the corresponding side face of the inner ring of described bearing, outer ring is provided with the groove that coincide and cooperate with described axial limiting projection and radially spacing hangnail.

Between the inner, two lip limits of described first, second double-lip sealing ring all by the interior concaved circular cambered surface transition on the seal ring inner peripheral surface.

Radially offer the dress ball hole that connects its inside and outside side face on the described bearing outer ring and be inserted with ball blocking block therein, be equipped with O-ring seals between ball blocking block and the dress ball hole, ball blocking block is a cylindricality, the inner is provided with the peach shape inner concave arc surface with the steel ball corresponding matching, also axially offers on the bearing outer ring to connect its two ends and the pin-and-hole that communicates with described dress ball hole and be inserted with the taper pin of wearing described ball blocking block therein.

The lips contact seal is adopted in the upper and lower of bearing of the present utility model, outside the sealing of bearing outside all is exposed to when using, also can reach better dustproof, waterproof, anti-aging and Drop-proof effect in the open air.

In addition, around the O RunddichtringO, can prevent effectively that outside rainwater from entering bearing inside on the ball blocking block external diameter of the present utility model, prolong bearing life.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of ball blocking block among Fig. 1;

Fig. 3 is the cooperating structure schematic representation of first double-lip sealing ring and bearing among Fig. 1;

Fig. 4 is the cooperating structure schematic representation of second double-lip sealing ring and bearing among Fig. 1.

Embodiment

As Fig. 1～shown in Figure 4, turntable bearing of the present utility model comprises bearing inner race 1, bearing outer ring 2 and being folded in the bearing, the steel ball 3 that biserial between the relative side face in outer ring distributes, radially offer on the bearing outer ring 2 and connect in it, the dress ball hole of outer circumferential face also is inserted with ball blocking block 5 therein, ball blocking block 5 is a cylindricality, be equipped with O-ring seals 6 between ball blocking block 5 and the dress ball hole, the inner is provided with the peach shape inner concave arc surface with the steel ball corresponding matching, also axially offers on the bearing outer ring 2 to connect its two ends, and the pin-and-hole that communicates with described dress ball hole also is inserted with the taper pin 4 of wearing described ball blocking block 5 therein.First end face of bearing inner race 1 is convexly set in more than 2 first end faces of outer ring, be equipped with first double-lip sealing ring 8 between near first end face of bearing inner race 1 the outer circumferential face and the inner peripheral surface of outer ring 2 corresponding positions, be extended with the symmetrical lip limit 81 of separating gradually the outer end to its inside on the inner peripheral surface of first double-

lip sealing ring

8,82, pass through the interior concaved circular cambered surface transition on the seal ring inner peripheral surface between the inner, two lip limits, described bearing inner race 2 is provided with the lip limit of arc convex and described first double-lip sealing ring 8 and the concaved circular cambered surface between the lip limit and coincide and cooperate, the periphery of first double-lip sealing ring 8 convexes with axial limiting projection 83, convex with radially spacing hangnail 84 on the end face of one end of first double-lip sealing ring 8, described bearing outer ring 1 is provided with the groove that coincide and cooperate with described axial limiting projection 83 and radially spacing hangnail 84.This groove has the interior week that is opened in bearing outer ring 1 and the opening on the end face, enters from end face for the appropriate section of first double-lip sealing ring 8.

Second end face of bearing inner race 1 is heavy to be located at below bearing outer ring 2 second end faces, be equipped with second double-lip sealing ring 9 between near second end face of bearing outer ring 2 the inner peripheral surface and the outer circumferential face of bearing inner race 1 corresponding position, second double-lip sealing ring 9 is compared with first double-lip sealing ring 8, its lip limit, the axial limiting projection and the similar of spacing hangnail radially, but the lip limit is arranged on the seal ring outer circumferential face, and axial limiting projection and radially spacing hangnail are arranged on the inner peripheral surface of seal ring.Corresponding, the inner peripheral surface near its second end face of bearing outer ring 2 is provided with the arc convex corresponding with the lip limit of second double-lip sealing ring, and bearing inner race 1 second end face and contiguous outer circumferential face are provided with the groove that coincide and cooperate with axial limiting projection and radially spacing hangnail.

Claims

1. wind-driven generator turntable bearing, comprise bearing inner race, bearing outer ring and be folded in steel ball between the relative side face of the inside and outside circle of bearing, it is characterized in that: first end face of bearing inner race is convexly set in more than bearing outer ring first end face, and second end face of bearing inner race is heavy to be located at below bearing outer ring second end face; Be equipped with first double-lip sealing ring between near first end face of bearing inner race outer circumferential face and the corresponding bearing outer ring inner peripheral surface, be extended with set identical cooperation of arc convex on the symmetrical lip limit of separating gradually the outer end and the described bearing inner race outer circumferential face to its inside on the inner peripheral surface of first double-lip sealing ring; Be equipped with second double-lip sealing ring between near second end face of bearing outer ring inner peripheral surface and the corresponding bearing inner race outer circumferential face, be extended with set identical cooperation of arc convex on the symmetrical lip limit of separating gradually the outer end and the described bearing inner race to its outside on the outer circumferential face of second double-lip sealing ring.

2. bearing according to claim 1, it is characterized in that: convex with the axial limiting projection on another side face of described first and second double-lip sealing ring with respect to place, lip limit side face, convex with radially spacing hangnail on the end face of the close axial limiting projection of first and second double-lip sealing ring, the corresponding side face of the inner ring of described bearing, outer ring is provided with the groove that coincide and cooperate with described axial limiting projection and radially spacing hangnail.

3. bearing according to claim 1 is characterized in that: between the inner, two lip limits of described first, second double-lip sealing ring all by the interior concaved circular cambered surface transition on the seal ring inner peripheral surface.

4. according to claim 1 or 2 or 3 described bearings, it is characterized in that: radially offer the dress ball hole that connects its inside and outside side face on the described bearing outer ring and be inserted with ball blocking block therein, be equipped with O-ring seals between ball blocking block and the dress ball hole, ball blocking block is a cylindricality, the inner is provided with the peach shape inner concave arc surface with the steel ball corresponding matching, also axially offers on the bearing outer ring to connect its two ends and the pin-and-hole that communicates with described dress ball hole and be inserted with the taper pin of wearing described ball blocking block therein.