CN217029649U

CN217029649U - Bearing structure of double-screw compressor

Info

Publication number: CN217029649U
Application number: CN202220708788.1U
Authority: CN
Inventors: 沈杰; 徐杰; 林欣毅
Original assignee: Shanghai Hanbell Precise Machinery Co ltd
Current assignee: Shanghai Hanbell Precise Machinery Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-22
Anticipated expiration: 2032-03-25

Abstract

The utility model discloses a bearing structure of a double-screw compressor, which comprises a rotating shaft, a bearing seat, a rear cover, an elastic component and a tapered roller bearing, wherein an inner frame of the tapered roller bearing is sleeved on the rotating shaft, an outer frame of the tapered roller bearing is connected into the bearing seat, the rear cover is connected with the bearing seat, and the elastic component is pressed between the rear cover and the outer frame of the tapered roller bearing. According to the bearing structure of the double-screw compressor, the outer frame of the tapered roller bearing is in mutual contact fit with the bearing seat and the elastic component, so that the tapered roller bearing commonly bears radial force and axial force, the service life of the bearing structure is prolonged, and the degree of limiting the center distance of the male rotor and the center distance of the female rotor is reduced; meanwhile, the assembly is convenient.

Description

Bearing structure of double-screw compressor

Technical Field

The utility model relates to a bearing structure of a double-screw compressor.

Background

At present, the specific structure of the rear end bearing of the screw air compressor main unit is shown in fig. 1, and both a cylindrical roller 1 and an angular contact ball bearing 2 are adopted, and the cylindrical roller 1 and the angular contact ball bearing 2 only bear radial force and axial force respectively, so the type selection of the bearing is limited by the fact that the center distance A of a male rotor and a female rotor is large, and each bearing only bears force in one direction, and the service life is short.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a bearing structure of a double-screw compressor.

The utility model is realized by the following technical scheme:

the utility model provides a bearing structure of double screw compressor, its includes axis of rotation, tapered roller bearing, bearing frame, back lid and elastomeric element, tapered roller bearing's inside casing cover is located the axis of rotation, tapered roller bearing's frame connect in the bearing frame, the back lid connect in the bearing frame, elastomeric element presses to be located the back lid with between tapered roller bearing's the frame.

Further, elastomeric element includes clamping ring and spring, the both ends of clamping ring support respectively lean on in the spring with tapered roller bearing's frame, the spring pressure is located the back lid with between the clamping ring.

Further, the bearing structure of the double-screw compressor further comprises a locking piece, and the locking piece is connected to one end, close to the rear cover, of the rotating shaft and abutted against an inner frame of the tapered roller bearing.

Further, the locking member is threadedly coupled to the rotating shaft.

Furthermore, the number of the rotating shaft is two, the number of the tapered roller bearings is four, every two tapered roller bearings are sleeved on one rotating shaft, and the two tapered roller bearings are abutted against and contacted with each other.

Further, the outer frame of the tapered roller bearing is in transition fit with the inner hole wall of the bearing seat.

The utility model has the beneficial effects that:

according to the bearing structure of the double-screw compressor, the outer frame of the tapered roller bearing is in mutual contact fit with the bearing seat and the elastic component, so that the tapered roller bearing bears radial force and axial force together, the service life of the bearing structure is prolonged, and the degree of limiting the center distance of the male rotor and the female rotor is reduced; meanwhile, the assembly is convenient.

Drawings

Fig. 1 is a schematic diagram of the internal structure of a rear end bearing of a screw air compressor main unit in the prior art.

Fig. 2 is a schematic view of the internal structure of the bearing structure of the twin-screw compressor of the embodiment of the utility model.

Detailed Description

The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the utility model may be practiced.

As shown in fig. 2, the embodiment discloses a bearing structure of a double-screw compressor, the bearing structure of the double-screw compressor includes a tapered roller bearing 3, a rotating shaft 4, a bearing seat 5, a back cover 6 and an elastic component 7, the rotating shaft 4 is sleeved with an inner frame of the tapered roller bearing 3, an outer frame of the tapered roller bearing 3 is connected in the bearing seat 5, the back cover 6 is connected in the bearing seat 5, and the elastic component 7 is pressed between the back cover 6 and the outer frame of the tapered roller bearing 3.

Sleeving the inner frame of the tapered roller bearing 3 on the rotating shaft 4, wherein the rotation of the rotating shaft 4 can drive the inner frame of the tapered roller bearing 3 to rotate together; the outer frame of the tapered roller bearing 3 is connected in the bearing seat 5, the elastic component 7 is pressed against the outer frame of the tapered roller bearing 3, and the outer frame of the tapered roller bearing 3 is in mutual contact fit with the bearing seat 5 and the elastic component 7, so that the tapered roller bearing 3 commonly bears radial force and axial force, the service life of a bearing structure of the double-screw compressor is prolonged, and the degree of limitation of the center distances of the male rotor and the female rotor is reduced; meanwhile, the assembly is convenient.

In this embodiment, the number of the rotating shafts 4 is two, the number of the tapered roller bearings 3 is four, one rotating shaft 4 is sleeved with every two tapered roller bearings 3, and the two tapered roller bearings 3 are in abutting contact with each other. The inner frames of the two paired tapered roller bearings 3 are sleeved on the rotating shaft 4, and the outer frames of the tapered roller bearings 3 are in transition fit with the inner hole wall of the bearing seat 5, so that the tapered roller bearings are convenient to install, and the outer frames of the tapered roller bearings 3 cannot slip. By matching the tapered roller bearings 3 with the same model, the two tapered roller bearings 3 bear radial force and axial force together, the service life of the bearing structure is prolonged, and the degree of limiting the center distance of the male rotor and the female rotor is reduced.

The elastic component 7 comprises a spring 71 and a pressing ring 72, two ends of the pressing ring 72 respectively abut against the spring 71 and the outer frame of the tapered roller bearing 3, and the spring 71 is pressed between the rear cover 6 and the pressing ring 72. The rear cover 6 presses the spring 71, and the spring 71 provides the bearing pre-tightening force required by the paired tapered roller bearing 3 through the elastic acting force of the spring 71, and is convenient to assemble.

The bearing structure of the double-screw compressor further comprises a locking member 8, and the locking member 8 is connected to one end of the rotating shaft 4 close to the rear cover 6 and abuts against the inner frame of the tapered roller bearing 3. The locking piece 8 can abut against the inner frame of the tapered roller bearing 3 and fix the two tapered roller bearings 3 on the rotating shaft 4, and the installation and the connection are very convenient. Preferably, the locker 8 is screw-coupled to the rotating shaft 4.

While the utility model has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the utility model is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. The bearing structure of the double-screw compressor is characterized by comprising a rotating shaft, a tapered roller bearing, a bearing seat, a rear cover and an elastic component, wherein an inner frame of the tapered roller bearing is sleeved on the rotating shaft, an outer frame of the tapered roller bearing is connected into the bearing seat, the rear cover is connected into the bearing seat, and the elastic component is pressed between the rear cover and the outer frame of the tapered roller bearing.

2. The bearing structure of a twin-screw compressor according to claim 1, wherein the elastic member includes a pressing ring and a spring, both ends of the pressing ring respectively abut against the spring and an outer frame of the tapered roller bearing, and the spring is compressed between the rear cover and the pressing ring.

3. The bearing structure of a twin-screw compressor according to claim 1, further comprising a locker attached to an end of the rotating shaft adjacent to the rear cover and abutting against the inner frame of the tapered roller bearing.

4. The bearing structure of a twin-screw compressor according to claim 3, wherein said locker is screw-coupled to said rotating shaft.

5. The bearing structure of a twin-screw compressor according to claim 1, wherein the number of said rotating shafts is two, the number of said tapered roller bearings is four, every two of said tapered roller bearings are fitted to one of said rotating shafts, and two of said tapered roller bearings are in abutting contact with each other.

6. The bearing structure of a twin-screw compressor according to claim 1, wherein an outer frame of the tapered roller bearing is transition-fitted to an inner bore wall of the bearing housing.