CN212563539U

CN212563539U - Axial pre-tightening and positioning device for main bearing of wind generating set

Info

Publication number: CN212563539U
Application number: CN202021050222.1U
Authority: CN
Inventors: 崔逸南; 崔新维
Original assignee: Beijing Sanli Xinneng Science & Technology Co ltd
Current assignee: Beijing Sanli Xinneng Science & Technology Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-02-19
Anticipated expiration: 2030-06-10

Abstract

The utility model discloses an axial pretension and positioner of wind generating set base bearing. The device comprises a positioning retaining ring, a positioning sleeve, a set screw and a pre-tightening ring, wherein the positioning retaining ring is positioned between the concave shaft shoulder and the positioning sleeve, and the positioning retaining ring is abutted against the concave shaft shoulder of the main shaft to form a reverse shaft shoulder positioning structure and is in surface contact with the positioning sleeve. The pre-tightening ring is positioned between the main bearing and the positioning sleeve and is contacted with the end face of the inner ring of the main bearing. A threaded hole is reserved in the positioning sleeve, and a set screw screwed in the positioning sleeve directly or indirectly acts on the pre-tightening ring to form axial positioning of the main bearing. The clearance between the positioning sleeve and the pre-tightening ring can be adjusted by rotating the set screw, namely the position of the positioning sleeve on the main shaft is adjusted, and the pre-tightening of the main bearing is further realized. The utility model provides an axial pretension of base bearing and the device commonality that positioner relates to are strong, and the installation and the maintenance of being convenient for do not reduce main shaft intensity when guaranteeing the bearing axial positioning effect almost.

Description

Axial pre-tightening and positioning device for main bearing of wind generating set

Technical Field

The utility model relates to an axial pretension and positioner of wind generating set base bearing belongs to wind power generation technical field.

Background

The main shaft is a core component of a modern wind generating set, and the main bearing has the function of supporting the main shaft and also bears various loads transmitted by the main shaft. Under the action of thrust load and additional bending moment load, the main bearing cannot move axially, otherwise, the service life of the main bearing is reduced, and the operation of the whole unit is influenced. The traditional main bearing is mainly axially positioned by a shaft end baffle, a fastening sleeve, an elastic retainer ring and the like. These methods generally place special demands on the rotational speed of the main shaft, the magnitude of the thrust and additional bending moment loads that need to be carried, and the location of the main bearings. The traditional main bearing positioning method can cause the problems of weakened main shaft strength, high failure probability or complex installation method, difficult maintenance and the like for the modern large horizontal shaft wind generating set. Therefore, a new method with strong bearing capacity, simple installation mode and good universality is needed to ensure the axial positioning effect of the main bearing.

CN 103210215 a discloses a drive train for a wind turbine generator system, wherein the main bearing positioning method mainly utilizes flange faces of a shaft shoulder and a shaft end. This positioning is not versatile, has special requirements on the position of the main bearing, and is not conducive to installation and maintenance.

CN 104632880B discloses a bearing device for wind turbine generator system, in which the function of axial positioning is performed by two pairs of angle self-aligning contact bearings, and this positioning method has limitations and high requirements on the bearing itself.

CN 203962303U discloses a main bearing axial positioning device, and the axial positioning of first pair of bearing has mainly utilized the shaft shoulder, and the second pair of bearing has utilized lock nut and the screw thread on the main shaft to cooperate, realizes axial positioning. The second positioning method has high requirements on the locking capacity of the locking nut and the machining precision of the matching threads on the locking nut and the main shaft.

Disclosure of Invention

The wind generating set needs a new axial pre-tightening and positioning method of the main bearing, the pre-tightening and positioning method relates to a device which is strong in universality, convenient to install and maintain, and capable of reducing the strength of the main shaft on the premise of ensuring the positioning effect.

The axial pretension and positioning device of the main bearing of the wind generating set adopts the technical scheme that:

the device for realizing axial pre-tightening and positioning of the main bearing of the wind generating set comprises a positioning baffle ring, a positioning sleeve, a set screw and a pre-tightening ring. The positioning retaining ring is abutted against the lower concave shaft shoulder of the main shaft to form a reverse shaft shoulder positioning structure. The positioning retaining ring is of a split structure, and the split structure can be connected or hooped through mechanical methods such as bolt connection and the like.

The positioning baffle ring is positioned between the concave shaft shoulder and the positioning sleeve, and the positioning baffle ring can be partially embedded into the positioning sleeve and forms plane or curved surface equal surface contact with the positioning sleeve. The positioning sleeve can be of an integral structure or a split structure. When a split structure is employed, a mechanical coupling needs to be provided. The positioning sleeve is provided with a plurality of threaded holes, the fastening screws are screwed in the threaded holes of the positioning sleeve, and the bearing directly or indirectly props against the pre-tightening ring or the bearing inner ring or the bearing outer ring by using the pins, so that the axial pre-tightening and positioning of the bearing are realized.

The pre-tightening ring is positioned between the main bearing and the positioning sleeve, the pre-tightening ring and the main bearing form direct surface contact, and the pre-tightening ring can be of an integral structure or a split structure. A proper gap is arranged between the positioning sleeve and the pre-tightening ring so as to adjust the axial position of the positioning sleeve, and when the set screw is rotated for pre-tightening, the positioning sleeve can directly or indirectly penetrate through the gap by using a pin to prop against the pre-tightening ring.

The utility model has the advantages that: the utility model discloses a horizontal axis wind generating set provides the axial pretension and the positioner of a base bearing. The device simple structure, the commonality is strong, has overcome the shortcoming that specific bearing location needs the positioner of special size, and the installation and maintenance of being convenient for do not cut down the intensity of main shaft itself under the prerequisite of guaranteeing the location effect almost.

Drawings

FIG. 1 is a schematic view of an axial pre-tightening and positioning device of a main bearing of a wind turbine generator system

Description of the drawings: 1-positioning baffle ring, 2-positioning sleeve, 3-set screw, 4-pre-tightening ring, 5-main bearing, 6-concave shaft shoulder and 7-main shaft

It is noted that the above-described figures are intended to illustrate the features of the invention and are not intended to show any actual structure or to reflect the details of the dimensions, relative proportions, etc. of the various components. In order to more clearly demonstrate the principles of the present invention and to avoid obscuring the same in unnecessary detail, the examples in the figures have been simplified. These illustrations do not present an inconvenience to those skilled in the relevant art in understanding the present invention, and the actual spindle system may include more components.

Detailed Description

For making the purpose and technical solution of the embodiments of the present invention clearer, the following description is combined with the relevant drawings of the embodiments of the present invention to perform a complete description of the embodiments of the present invention. The embodiments described in this patent are some, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, the device for realizing axial pre-tightening and positioning of the main bearing of the wind generating set comprises a positioning baffle ring (1), a positioning sleeve (2), a set screw (3) and a pre-tightening ring (4). The positioning baffle ring (1) is abutted against a concave shaft shoulder (6) of the main shaft (7) to form a reverse shaft shoulder positioning structure. The recessed shoulder may be formed by an annular groove machined into the spindle. The positioning baffle ring (1) is of a split structure, and the split structure can be connected or hooped through mechanical methods such as bolt connection and the like.

The positioning retaining ring (1) is positioned between the concave shaft shoulder (6) and the positioning sleeve (2). The positioning baffle ring (1) can be partially embedded into the positioning sleeve (2) and forms plane or curved surface contact with the positioning sleeve (2). The locating sleeve (2) can be of an integral structure or a split structure, and when the split structure is adopted, mechanical connection is required to be configured. Because the positioning baffle ring (1) is positioned at the position of the concave shaft shoulder, the diameter of the positioning sleeve (2) is larger than that of the positioning baffle ring (1), when the thrust and the additional bending moment load transmitted by the main bearing (5) are transmitted, a load component pointing to the rotating shaft of the main shaft (7) is formed at the positioning baffle ring (1), the larger the original load value is, the more obvious the tightening effect on the positioning baffle ring (1) is, and the better the positioning effect of the positioning baffle ring (1) on the concave shaft shoulder is.

The pre-tightening ring (4) is positioned between the main bearing (5) and the positioning sleeve (2), and the pre-tightening ring (4) is in direct surface contact with the main bearing (5). The positioning sleeve (2) is provided with a plurality of threaded holes, the set screws (3) are screwed in the threaded holes of the positioning sleeve (2) and directly or indirectly prop against the pre-tightening ring (4) or the inner ring or the outer ring of the bearing by using pins, so that the axial pre-tightening and positioning of the bearing are realized.

A proper gap is arranged between the positioning sleeve (2) and the pre-tightening ring (4), and the size of the gap and the axial position of the positioning sleeve (2) can be adjusted at will according to the positions of the main bearing (5) and the concave shaft shoulder (6). When the set screw (3) is rotated for pre-tightening, the set screw can directly or indirectly penetrate through the gap by using a pin to prop against the pre-tightening ring (4).

When the axial positioning device of the main bearing is installed, the pre-tightening ring (4) is installed firstly, and then the positioning sleeve (2) is installed. Because the set screw (3) in the locating sleeve (2) is not screwed at this time, the position of the locating sleeve (2) can be adjusted to ensure that the concave shaft shoulder (6) on the main shaft (7) is completely out of the way. Therefore, the positioning baffle ring (1) can smoothly abut against the concave shaft shoulder (6). Finally, the gap between the positioning sleeve (2) and the pre-tightening ring (4) can be adjusted by rotating the set screw (3), so that the positioning baffle ring (1) is in contact with the positioning sleeve (2), and the effect of load transmission is achieved.

Claims

1. Axial pretension and positioner of wind generating set base bearing, characterized by: the device comprises a positioning baffle ring (1), a positioning sleeve (2), a set screw (3) and a pre-tightening ring (4); the positioning baffle ring (1) is abutted against a concave shaft shoulder (6) of the main shaft (7) to form a reverse shaft shoulder positioning structure; the positioning retaining ring (1) is of a split structure, the split structure is connected or hooped through mechanical modes such as bolt connection, the positioning retaining ring (1) is located between the concave shaft shoulder (6) and the positioning sleeve (2), the positioning retaining ring (1) can be partially embedded into the positioning sleeve (2) and forms plane or curved surface equal-surface contact with the positioning sleeve (2), the positioning sleeve (2) can be of an integral structure or a split structure, when the split structure is adopted, mechanical connection is achieved, the positioning sleeve (2) is provided with a plurality of threaded holes, the fastening screws (3) are screwed in the threaded holes of the positioning sleeve (2), and the pre-fastening ring (4) or the inner ring or the outer ring of the bearing is directly or indirectly abutted through pins, so that axial pre-fastening and positioning of the bearing are achieved.

2. An axial pretensioning and positioning device for a main bearing of a wind turbine generator system according to claim 1, characterized in that: a proper gap is arranged between the positioning sleeve (2) and the pre-tightening ring (4) to adjust the axial position of the positioning sleeve (2), and when the set screw (3) is rotated for pre-tightening, the set screw can directly or indirectly penetrate through the gap through a pin to prop against the pre-tightening ring (4).

3. An axial pretensioning and positioning device for a main bearing of a wind turbine generator system according to claim 1, characterized in that: the pre-tightening ring (4) is positioned between the main bearing (5) and the positioning sleeve (2), the pre-tightening ring (4) is in direct surface contact with the main bearing (5), the pre-tightening ring (4) can be of an integral structure or a split structure, and when the split structure is adopted, mechanical connection is required.