CN2714885Y

CN2714885Y - Bearing soft pretightening and anti-rotating structure

Info

Publication number: CN2714885Y
Application number: CN 200420062118
Authority: CN
Inventors: 陆龙胜
Original assignee: Wuxi Compressor Co Ltd
Current assignee: Wuxi Compressor Co Ltd
Priority date: 2004-06-25
Filing date: 2004-06-25
Publication date: 2005-08-03
Anticipated expiration: 2014-06-25

Abstract

The utility model relates to a bearing soft pretightening and anti-rotating structure. If the radial additional stress which a bearing supports is small, the service life of the bearing is long. Friction cannot create between a wave shape spring and the bearing. Even if the wave shape spring is damaged, the normal operation of the bearing cannot be influenced. The utility model comprises a bearing seat which is sheathed with a rotor. A bearing supporting the radial force and a bearing supporting the axial force are respectively sheathed in the bearing seat and on the rotor. A compressible gasket is pressed and arranged between the inner ring and the outer ring of the two bearings. Thrust discs are sheathed between the bearing supporting the radial force and the bearing seat, and on the rotor. The two side surfaces of the thrust discs are respectively connected with the inner ring of the bearing supporting the radial force and the thrust face of the rotor shaft shoulder. On the side which is close to the thrust disc, the outer ring of the bearing supporting the radial force is connected with the thrust face of the bearing seat. The other side of the inner ring of the support axial force bearing is provided with a pressing plate which is connected with the rotor through screws. The utility model is characterized in that on the external side of the pressing plate, a spring seat, a spring and a press cover are pressed and installed on the outer ring of the bearing supporting the axial force one after another. The press cover and the bearing seat is connected by the screws.

Description

The soft pretension and the rotation prevention structure of bearing

(1) technical field

The utility model relates to mechanical fitting, is specially the soft pretension and the rotation prevention structure of bearing.

(2) background technique

The size of shaft strength and the situation of composite force directly have influence on the working life of bearing, and reasonably Bearing Installation and compacted form can reduce the composite force of bearing.The pretension of existing bearing and rotation prevention structure are exactly directly to press-fit gland on the outer ring of bearing or gland press-fits outer ring in bearing by wavy spring.The shortcoming of first kind of structure is exactly that gland directly kills the outer ring of bearing, radially can not free floating during bearing working, therefore can be subjected to radially additional force, and no matter be subjected to the axial force bearing or be subjected to the radial force bearing, all can be affected its working life; And compress by the outer ring of wavy spring with bearing, obtained prolongation the working life of bearing, but the friction between the outer ring of wavy spring and bearing makes easily wavy spring damage, thereby have influence on the proper functioning of bearing.

(3) summary of the invention

At the pretension and the rotation prevention structure of existing bearing, gland compresses the outer ring of bearing, and bearing can be subjected to radially additional force, and be affected the working life of bearing; And compress by the outer ring of wavy spring with bearing, wavy spring is fragile, thereby has influence on the shortcoming of the proper functioning of bearing, and the utility model provides a kind of soft pretension and rotation prevention structure of bearing, the suffered radially additional force of bearing is less, and its working life is longer; Can not produce friction between wavy spring and the bearing, even wavy spring damages the proper functioning that also can not have influence on bearing, the working life of bearing is longer.

The technical solution of the utility model is such: it comprises bearing support, described bearing sleeve is loaded on rotor, in the described bearing support, be respectively installed with on the described rotor and be subjected to the radial force bearing and be subjected to the axial force bearing, be pressed with packing ring between the inner ring of two bearings and the outer ring respectively, be subjected between radial force bearing and the described bearing support described, be set with thrust disc on the described rotor, the bi-side of described thrust disc contact the inner ring that is subjected to the radial force bearing and the thrust surface of the rotor shaft shoulder respectively, near a side of described thrust disc, the described thrust surface that is subjected to the outer ring engagement shaft bearing of radial force bearing; The described opposite side of axial force bearing inner race that is subjected to is pressed with pressing plate, and described pressing plate is connected with rotor by screw; It is characterized in that: in the outside of described pressing plate, be pressed with spring seat, spring, gland successively on the described outer ring that is subjected to the axial force bearing, be connected with screw between described gland and the described bearing support.

Its binding site that is further characterized in that described spring seat and described gland is equipped with stop pin; Binding site between described gland and the described bearing support is provided with seal ring.

The utility model adopts after the said structure, elastic pressure by spring and spring seat will be subjected to the axial force bearing and compressed by the outer ring of radial force bearing, in two bearings when work, be free floating radially all, suffered radially additional force is less, and its working life is longer, and wavy spring does not contact with the outer ring that is subjected to the axial force bearing, therefore just can not occur relatively moving yet, spring is not fragile, only is enclosed in the spring seat even spring breakage damages yet, and can not have influence on the proper functioning of bearing.

(4) description of drawings

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

(5) embodiment

See Fig. 1, the utility model comprises bearing support 2, bearing support 2 is set in rotor 1, in the bearing support 2, be respectively installed with on the rotor 1 and be subjected to radial force bearing 4 and be subjected to axial force bearing 5, be pressed with packing ring between the inner ring of two bearings and the outer ring respectively, be subjected between radial force bearing 4 and the bearing support 2, be set with thrust disc 3 on the rotor 1, the bi-side of thrust disc 3 contact the inner ring that is subjected to radial force bearing 4 and the thrust surface of rotor 1 shaft shoulder respectively, near a side of thrust disc 3, be subjected to the thrust surface of the outer ring engagement shaft bearing 2 of radial force bearing 4; Be subjected to the opposite side of axial force bearing 5 inner rings to be pressed with pressing plate 6, pressing plate 6 is connected with rotor 1 by screw 11; In the outside of pressing plate 6, be subjected to be pressed with spring seat 8, spring 7, gland 10 successively on the outer ring of axial force bearing 5, be connected with screw 13 between gland 10 and the bearing support 2.Spring seat 8 is equipped with stop pin 12 with the binding site of gland 10.Binding site between gland 10 and the bearing support 2 is provided with seal ring 9.Pressing plate 6 and screw 11 are with bearing 4 like this, the inner ring of bearing 5 is pressed abd fixed on the rotor 1, gland 10, screw 13 is by spring 7, spring seat 8 is with bearing 4, the outer ring of bearing 5 is pressed on the bearing support 2, bearing 4 only is subjected to radial thrust, accurately locate in the hole of the outer ring of bearing 4 and bearing support 2, leave gap bearing 5 between the outer ring of bearing 5 and the bearing support 2 and only be subjected to end thrust, the axial compression amount of 10 pairs of wavy springs of gland makes wavy spring 7 produce pretightening force, wavy spring 7 passes to spring seat 8 with pretightening force, spring seat 8 is delivered to power the outer ring of bearing 5 again, be pressed on the bearing support 2 by the outer ring of elastic force bearing 4, stop pin 12 stops spring seat 8 to rotate, seal ring 9 stops the oil leakage in the bearing bore to go out, the pretightening force that 10 pairs of wavy springs 7 of gland are produced is slightly larger than the reverse axial force that is produced when rotor reverses, and promptly also can guarantee the axially locating of rotor when rotor reverses.

Claims

1, the soft pretension and the rotation prevention structure of bearing, it comprises bearing support, described bearing sleeve is loaded on rotor, in the described bearing support, be respectively installed with on the described rotor and be subjected to the radial force bearing and be subjected to the axial force bearing, be pressed with packing ring between the inner ring of two bearings and the outer ring respectively, be subjected between radial force bearing and the described bearing support described, be set with thrust disc on the described rotor, the bi-side of described thrust disc contact the inner ring that is subjected to the radial force bearing and the thrust surface of the rotor shaft shoulder respectively, near a side of described thrust disc, the described thrust surface that is subjected to the outer ring engagement shaft bearing of radial force bearing; The described opposite side of axial force bearing inner race that is subjected to is pressed with pressing plate, and described pressing plate is connected with rotor by screw; It is characterized in that: in the outside of described pressing plate, be pressed with spring seat, spring, gland successively on the described outer ring that is subjected to the axial force bearing, be connected with screw between described gland and the described bearing support.

2,, it is characterized in that the binding site of described spring seat and described gland is equipped with stop pin according to the soft pretension and the rotation prevention structure of the described bearing of claim 1.

3,, it is characterized in that the binding site between described gland and the described bearing support is provided with seal ring according to the soft pretension and the rotation prevention structure of the described bearing of claim 1.