CN201896704U

CN201896704U - Slewing bearing provided with three rows of steel balls and used for wind driven generator

Info

Publication number: CN201896704U
Application number: CN2010206559562U
Authority: CN
Inventors: 唐运军
Original assignee: Suote Transmission Equipment Co Ltd
Current assignee: Suote Transmission Equipment Co Ltd
Priority date: 2010-12-13
Filing date: 2010-12-13
Publication date: 2011-07-13
Anticipated expiration: 2020-12-13

Abstract

The utility model discloses a slewing bearing provided with three rows of steel balls and used for a wind driven generator. The slewing bearing comprises an outer ring, steel balls, isolation blocks, an inner ring, an upper seal ring, and a lower seal ring, wherein an upper eccentric semi-arc outer raceway, a middle eccentric semi-arc outer raceway and a lower eccentric semi-arc outer raceway are formed at intervals at the upper, middle and lower parts of the inner circular surface of the outer ring, and an upper eccentric semi-arc inner raceway, a middle eccentric semi-arc inner raceway and a lower eccentric semi-arc inner raceway are formed at intervals at the upper, middle and lower parts of the inner circular surface of the inner ring; and the upper eccentric semi-arc outer raceway, the middle eccentric semi-arc outer raceway and a lower eccentric semi-arc outer raceway correspond to the upper eccentric semi-arc inner raceway, the middle eccentric semi-arc inner raceway and the lower eccentric semi-arc inner raceway respectively, so as to integrally form three rows of steel ball raceways, namely an upper row of steel ball raceway, a middle row of steel ball raceway and a lower row of steel ball raceway; and the steel balls and the isolation blocks are assembled in the upper, middle and lower raceways, so as to enable the outer ring and the inner ring to rotate relatively. The slewing bearing is borne by three rows of steel balls simultaneously, so that the requirement of a large-scale wind driven generator for a slewing bearing structure with a more compact structure and a greater bearing capacity can be met.

Description

Wind-driven generator three row ball type slewing bearings

Technical field

The utility model relates to a kind of accessory of wind-driven generator, is specifically related to a kind of three row ball type slewing bearings that are used for wind-driven generator.

Background technique

China utility model patent CN201202733Y discloses a kind of double ball-type slewing bearing, comprise outer ring, inner ring and steel ball and spacing block, the outer ring is a ring part, up and down symmetry is offered radius at interval all greater than raceway under raceway on the eccentric semi-circle of steel ball radius and the eccentric semi-circle on the inner ring surface of outer ring, up and down symmetry is offered radius at interval all greater than outer raceway under outer raceway and the eccentric semi-circle on the eccentric semi-circle of steel ball radius on the outer ring surface of inner ring, the double ball-type slewing bearing of raceway cooperation formation of outer ring and inner ring.This structure can make engineering machinery especially the pivoting support of truck crane possess enough axial forces, radial force and tilting moment, increase substantially bearing capacity, be easy to install and pull down, the safe and reliable life-span is long.

Wind driven generator yaw is generally this type of double ball-type slewing bearing with pivoting support at present, but exploitation along with 5MW, 10MW and above large-scale wind driven generator, it can not meet the demands gradually, though or meet the demands bulky, thereby cause the blower fan manufacture cost sharply to increase.Therefore need a kind of structure more compact in a hurry, the requirement of wind driven generator yaw is satisfied in the novel rotation supporting that bearing capacity is bigger.

Summary of the invention

The utility model purpose provides a kind of wind-driven generator three row ball type slewing bearings, satisfies present large-scale wind driven generator, large-scale road traveling engineering truck etc. to pivoting support compact structure, requirements at the higher level that bearing capacity is big.

For achieving the above object, the technical solution adopted in the utility model is: a kind of wind-driven generator three row ball type slewing bearings, comprise the outer ring, steel ball, spacing block, last seal ring, lower seal and inner ring, be equipped with described inner ring in the interior annular distance of described outer ring and make the equal correspondence in last plane and bottom plane of described inner ring be positioned at the last plane of described outer ring and the top of bottom plane, described upward seal ring is positioned at the position, top on plane on the described outer ring, in the last annular groove of offering on the outer ring surface of described inner ring, described lower seal is positioned at the lower portion of described inner ring bottom plane, in the following annular groove of offering on the inner ring surface of described outer ring, upper, middle and lower is offered radius at interval all greater than outer raceway on the eccentric semi-circle of steel ball radius on the inner ring surface of described outer ring, eccentric semi-circle China and foreign countries' raceway and eccentric semi-circle be outer raceway down, and upper, middle and lower is offered radius at interval all greater than interior raceway on the eccentric semi-circle of steel ball radius on the outer ring surface of described inner ring, the down interior raceway of raceway and eccentric semi-circle in the eccentric semi-circle; The outer raceway of described eccentric semi-circle upper, middle and lower spacing and the interior raceway spacing between any two of described eccentric semi-circle upper, middle and lower between any two equates, the all identical and complete steel ball upper, middle and lower raceway of corresponding respectively formation of the semi-circle radius surface of the semi-circle radius surface of the outer raceway of described eccentric semi-circle upper, middle and lower and the interior raceway of described eccentric semi-circle upper, middle and lower, described steel ball and spacing block are assemblied in the row's raceway of described upper, middle and lower, and described outer ring and described inner ring can be relatively rotated.

During work, the inner ring of pivoting support is connected with the chassis portion of engineering machinery is corresponding with rotating part respectively with the outer ring, can bear huge axial force, radial force and tilting moment, can antifatigue carry, under the limited condition of the supporting installing space of engineering machinery, can increase substantially the bearing capacity of pivoting support, and be easy to installation and removal, safe and reliable, the life-span is long.

In the technique scheme, the excircle of described outer ring can have external toothing also can not have external toothing.

In the technique scheme, the inner circumference of described inner ring can have ring gear also can not have ring gear.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:

Owing to the utlity model has three row's steel balls, compare the pressure that the many row's steel ball carryings of single-row double ball-type slewing bearing give from engineering machinery, the stack of a plurality of steel ball bearing capacitys constitutes the bearing capacity of whole pivoting support, so the bearing capacity of three row ball type slewing bearings is bigger.Simultaneously, under the equal bearing capacity situation, average pressure to each steel ball of three row ball type slewing bearings is less than the pressure on single-row each steel ball of double ball-type slewing bearing, so can be with the volume design of the steel ball volume of three row ball type slewing bearings even whole pivoting support littler, the circumferencial direction size can reduce more than 30%, is particularly suited for using as powerful wind driven generator yaw pivoting support.

Description of drawings

Fig. 1 is the utility model embodiment one structural representation.

Fig. 2 is the utility model embodiment two structural representations.

Fig. 3 is the utility model embodiment three structural representations.

Fig. 4 is an outer ring raceway schematic representation among the utility model embodiment.

Fig. 5 is an inner ring raceway schematic representation among the utility model embodiment.

Wherein: 1, outer ring; 2, steel ball; 3, go up seal ring; 4, spacing block; 5, inner ring; 6, lower seal.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: referring to shown in Figure 1, a kind of three row ball type slewing bearings, comprise outer ring 1, steel ball 2, spacing block 4, inner ring 5, go up seal ring 3, lower seal 6, the excircle of described outer ring 1 can have external toothing, is equipped with described inner ring 5 in the interior annular distance of described outer ring 1 and makes the equal correspondence in last plane and bottom plane of described inner ring 5 be positioned at the last plane of described outer ring 1 and the top of bottom plane.Upper, middle and lower is offered radius at interval all greater than outer raceway under outer raceway, eccentric semi-circle China and foreign countries' raceway and the eccentric semi-circle on the eccentric semi-circle of steel ball 2 radiuses on the inner ring surface of described outer ring 1, the symmetrical up and down radius of offering at interval is all greater than the down interior raceway of interior raceway and eccentric semi-circle in interior raceway, the eccentric semi-circle on the eccentric semi-circle of steel ball 2 radiuses on the outer ring surface of described inner ring 5, and the outer raceway of described eccentric semi-circle upper, middle and lower spacing between any two is equal with the interior raceway spacing between any two of described eccentric semi-circle upper, middle and lower.The all identical and corresponding respectively complete steel ball upper, middle and lower three row's raceways that form of the semi-circle radius surface of the semi-circle radius surface of the outer raceway of described eccentric semi-circle upper, middle and lower and the interior raceway of described eccentric semi-circle upper, middle and lower; Described steel ball 2 and spacing block 4 are assemblied in upper, middle and lower three row's steel ball rolling channels, and described outer ring 1 can be rotated relatively with described inner ring 5.The described seal ring 3 of going up is positioned at the last annular groove of offering on the outer ring surface of position, top, described inner ring 5 on plane on the described outer ring 1, described lower seal 6 is positioned at the following annular groove of offering on the inner ring surface of lower portion, described outer ring 1 of described inner ring 4 bottom planes, enters raceway to prevent rainwater, dust etc.During work, the inner ring 5 of pivoting support is connected with the chassis portion of engineering machinery is corresponding with rotating part respectively with outer ring 1, can bear huge axial force, radial force and tilting moment, can antifatigue carry, under the limited condition of the supporting installing space of engineering machinery, can increase substantially the bearing capacity of pivoting support, and be easy to installation and removal, safe and reliable, the life-span is long.

Fig. 4,5 shows the raceway schematic representation on described outer ring 1 and the described inner ring 5, and the outer raceway of the eccentric semi-circle upper, middle and lower on the described outer ring 1 spacing and the interior raceway spacing between any two of the eccentric semi-circle upper, middle and lower on the described inner ring 5 between any two equates.The semi-circle radius surface of raceway is all identical in the eccentric semi-circle upper, middle and lower on the semi-circle radius surface of the outer raceway of the eccentric semi-circle upper, middle and lower on the described outer ring 1 and the described inner ring 6.

Embodiment two: shown in Fig. 2 is second kind of embodiment of the present utility model, embodiment two is structurally basic identical with embodiment one, include the outer ring 1 that has the outer raceway of upper, middle and lower, the inner ring 5 that has raceway in the upper, middle and lower, steel ball 2, spacing block 4, go up seal ring 3 and lower seal 6, the assembly relation between each part is also identical with embodiment one.Different being between embodiment two and the embodiment one: do not have external toothing on the excircle of embodiment two outer ring 1, have ring gear on the inner circumference of inner ring 5.

Embodiment three: shown in Fig. 3 is the third embodiment of the present utility model, embodiment three is structurally basic identical with embodiment one, include the outer ring 1 that has the outer raceway of upper, middle and lower, the inner ring 5 that has raceway in the upper, middle and lower, steel ball 2, spacing block 4, go up seal ring 3 and lower seal 6, the assembly relation between each part is also identical with embodiment one.Different being between embodiment three and the embodiment one: do not have external toothing on the excircle of embodiment three outer ring 1.

Claims

1. wind-driven generator three row ball type slewing bearings, comprise outer ring (1), steel ball (2), spacing block (4), last seal ring (3), lower seal (6) and inner ring (5), be equipped with described inner ring (5) in the interior annular distance of described outer ring (1) and make the equal correspondence in last plane and bottom plane of described inner ring (5) be positioned at the last plane of described outer ring (1) and the top of bottom plane, the described seal ring (3) of going up is positioned at the position, top that the plane is gone up in described outer ring (1), in the last annular groove of offering on the outer ring surface of described inner ring (5), described lower seal (6) is positioned at the lower portion of described inner ring (5) bottom plane, in the following annular groove of offering on the inner ring surface of described outer ring (1), it is characterized in that:

Upper, middle and lower is offered radius at interval all greater than outer raceway on the eccentric semi-circle of steel ball (2) radius, eccentric semi-circle China and foreign countries' raceway and eccentric semi-circle outer raceway down on the inner ring surface of a, described outer ring (1), and upper, middle and lower is offered radius at interval all greater than raceway and the down interior raceway of eccentric semi-circle in raceway, the eccentric semi-circle on the eccentric semi-circle of steel ball (2) radius on the outer ring surface of described inner ring (6);

Raceway spacing between any two is equal with the interior raceway spacing between any two of described eccentric semi-circle upper, middle and lower outside b, the described eccentric semi-circle upper, middle and lower, steel ball upper, middle and lower row's raceway that the semi-circle radius surface of raceway is all identical and the formation of difference correspondence is complete in the semi-circle radius surface of the outer raceway of described eccentric semi-circle upper, middle and lower and the described eccentric semi-circle upper, middle and lower.

2. wind-driven generator three row ball type slewing bearings according to claim 1 is characterized in that: the excircle of described outer ring (1) has external toothing.

3. wind-driven generator three row ball type slewing bearings according to claim 1 is characterized in that: the inner circumference of described inner ring (6) has ring gear.