CN217842423U

CN217842423U - Double-support bearing

Info

Publication number: CN217842423U
Application number: CN202221995585.1U
Authority: CN
Inventors: 钱柄旭; 盛敏敏; 顾展; 吴峰
Original assignee: Shanghai Meike Detection Technology Co ltd
Current assignee: Shanghai Meike Detection Technology Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-18
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a double-support bearing, which comprises a rotor shaft, a radial sliding bearing and a single-row deep groove ball bearing; the rotor shaft penetrates through the stator, and two ends of the rotor shaft are respectively arranged on the first limiting assembly and the second limiting assembly; the radial sliding bearing is positioned at one end of the stator and is arranged in the first limiting component of the rotor shaft in a penetrating way; and the single-row deep groove ball bearing is positioned at the other end of the stator and penetrates through the rotor shaft second limiting assembly. The scheme adopts a structure combining the radial sliding bearing and the single-row deep groove ball bearing, the radial position and the stress of the rotor of the motor are determined by the radial sliding bearing, and the axial position and the stress are determined by the single-row deep groove ball bearing.

Description

Double-support bearing

Technical Field

The utility model relates to a mechanical equipment makes technical field, concretely relates to double bracing formula bearing.

Background

With the development of economic technology, the high-power three-phase asynchronous motor is widely applied, and because the rotor of the high-power three-phase asynchronous motor has large mass, the conventional rolling bearing can not meet the requirement of radial stress, and radial sliding bearings are generally selected by manufacturers. Radial sliding bearing has satisfied the radial atress's of rotor when normal work needs well, but because the motor is at the normal operating in-process because motor stator rotor magnetic force central line can not coincide completely, the axial force that the cooling air current produced, rotor dynamic balance deviation and external equipment's influence etc. all can produce the axial force to the rotor, and then produce the axial float, influence equipment safe operation, can produce mechanical spark in serious cases and cause equipment damage, influence safety in production, consequently, the conventional radial sliding bearing that uses is the operational reliability low when the motor rotor rotates promptly.

Therefore, a new type of bearing is urgently needed to improve the reliability of the motor rotor during rotation, which is a problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problem that a radial sliding bearing in the existing motor is low in reliability, the purpose of the scheme is to provide the double-support bearing, the problem of axial movement of a rotor can be solved under the condition that the radial stress of the rotor of the high-power motor is met, the reliability of the rotor of the motor in rotation is greatly improved, and the problems in the prior art are well solved.

In order to achieve the above object, the present invention provides a double-support bearing, which comprises a rotor shaft, a radial sliding bearing, and a single-row deep groove ball bearing; the rotor shaft penetrates through the stator, and two ends of the rotor shaft are respectively arranged on the first limiting assembly and the second limiting assembly; the radial sliding bearing is positioned at one end of the stator and is arranged in the first limiting component of the rotor shaft in a penetrating way; and the single-row deep groove ball bearing is positioned at the other end of the stator and penetrates through the rotor shaft second limiting assembly.

Further, the double-support bearing also comprises a stator end cover bearing seat; the stator end cover bearing seat is arranged on the periphery of the stator.

Further, the radial sliding bearing is located at one end of the stator and penetrates through the rotor shaft to be connected with the bearing seat of the end cover of the stator in a matching mode.

Further, the first limit component is composed of a first circular step arranged along a rotor shaft circle Zhou Duichen.

Further, the diameter of the first circular step is larger than the diameter of the radial sliding bearing.

Further, a sliding bearing seat end cover is arranged outside the radial sliding bearing port.

Furthermore, the single-row deep groove ball bearing is located at the other end of the stator and penetrates through the rotor shaft to be connected with the bearing seat of the end cover of the stator in a matched mode.

Further, the second limiting component is composed of a second circular step arranged along the rotor shaft circle Zhou Duichen.

Further, the diameter of the second round step is larger than that of the single-row deep groove ball bearing.

Furthermore, the inner ring of the single-row deep groove ball bearing is positioned by a rotor shaft, the outer ring is sequentially provided with an adjusting pad and a sliding bearing seat end cover, and the adjusting pad and the sliding bearing seat end cover are used for pressing and positioning the inner ring.

The utility model provides a double bracing formula bearing, its structure through adopting radial slide bearing and single deep groove ball bearing combination, the rotor radial position and the atress of motor are confirmed by radial slide bearing, and axial position and atress are confirmed by single deep groove ball bearing, under the condition that satisfies the radial atress of high-power motor rotor, have solved the problem of rotor axial float, have improved the reliability of motor rotor when rotating greatly.

Drawings

The invention is further described with reference to the following drawings and detailed description.

FIG. 1 is an assembly schematic of the novel bearing structure;

fig. 2 is a schematic structural diagram of the novel bearing structure.

The following are labeled descriptions of the components in the drawings:

100. the bearing structure 110, the rotor shaft 120, the radial sliding bearing 130, the stator end cover bearing seat 140, the sliding bearing seat end cover 150, the single-row deep groove ball bearing 160, the adjusting pad 170, the first limiting assembly 180 and the second limiting assembly.

Detailed Description

In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further explained by combining with the specific figure below.

Aiming at the technical problem that a radial sliding bearing in the existing motor is low in reliability, based on the technical problem, the scheme provides the double-support bearing, the radial position and stress of a rotor of the motor are determined by the radial sliding bearing and the axial position and stress of the rotor are determined by the single-row deep groove ball bearing by adopting a structure of combining the radial sliding bearing and the single-row deep groove ball bearing, under the condition of meeting the radial stress of the rotor of the high-power motor, the problem of axial movement of the rotor is solved, and the reliability of the rotor of the motor during rotation is greatly improved.

The double-support bearing provided by the scheme is suitable for installing a large motor in a bedroom, and the motor comprises a stator, a rotor and an end cover; the end cover is arranged at the port of the stator, and the rotating shaft of the rotor penetrates through the stator. The stator in the motor is horizontally installed by a motor foot, and the rotor in the motor is supported by a bearing seat and is installed on the machine base through the bearing seat.

Referring to fig. 1, the novel bearing structures 100 are symmetrically disposed on both sides of the rotor, and each bearing structure is the same, referring to fig. 2, and includes a journal bearing 120, a single-row deep groove ball bearing 150, a setting pad 160, a journal bearing housing end cap 140, a rotor shaft 110, and a stator end cap bearing housing 130.

The stator end cap bearing housing 130 is disposed about the stator.

The radial sliding bearing 120 and the single-row deep groove ball bearing 150 are arranged in the bearing seat 130 of the stator end cover, and a unified lubricating system is adopted, so that the reliability of the radial sliding bearing 120 and the single-row deep groove ball bearing 150 in application can be ensured.

The rotor shaft 110 penetrates through the stator to be arranged, the radial sliding bearing 120 is used for bearing radial stress of a motor rotor, is located at one end of the stator, penetrates through the rotor shaft 110 to be connected with the stator end cover bearing seat 130 in a matched mode, and is assembled through the stator end bearing seat 130.

Meanwhile, the two ends of the radial sliding bearing 120 are provided with the first limiting assemblies 170, a limiting area is formed by the first limiting assemblies 170, and the radial sliding bearing 120 can slide in the limiting area for a certain stroke to bear the radial stress of the motor rotor.

The first limit component 170 is formed by a circular step symmetrically arranged along the circumference of the rotor shaft 110, and the diameter of the circular step is larger than that of the radial sliding bearing 120, so that the radial sliding bearing 120 can be limited in the limit area.

A plain bearing housing end cap 140 is provided on the outside of the journal bearing 120 port to seal it and prevent dust from entering and affecting the use of the journal bearing 120.

The single-row deep groove ball bearing 150 is used for bearing axial stress of the motor rotor, is located at the other end of the stator, penetrates through the rotor shaft 110, is connected with the stator end cover bearing block 130 in a matching mode, and is assembled through the stator end bearing block 130.

Meanwhile, the two ends of the single-row deep groove ball bearing 150 are provided with the second limiting assemblies 180, a limiting area is formed by arranging the second limiting assemblies 180, and the single-row deep groove ball bearing 150 is limited and fixed in the radial direction, so that the single-row deep groove ball bearing 150 cannot move in the radial direction.

The second limit component 180 is composed of circular steps symmetrically arranged along the circumference of the rotor shaft 110, the diameter of the circular steps is larger than that of the single-row deep groove ball bearing 150, and the single-row deep groove ball bearing 150 can be limited in the limit area.

The inner ring of the single-row deep groove ball bearing 150 is positioned by the rotor shaft 110, the outer ring is sequentially provided with an adjusting pad 160 and a sliding bearing seat end cover 140, and the sliding bearing seat end cover 140 and the adjusting pad 160 are pressed and positioned.

Meanwhile, the space inside the sliding bearing seat end cover 140 can be changed by adjusting the thickness of the adjusting pad 160, so that the axial position of the rotor can be finely adjusted in the radial direction.

It should be noted that in the present embodiment, the structural composition and the operation principle of the radial sliding bearing 120 and the single-row deep groove ball bearing 150 are well known to those skilled in the art, and will not be described herein.

The type of the radial sliding bearing 120 is determined according to the conditions such as rotor quality and operation acceptance; the axial force generated by the cooling air flow, the rotor dynamic balance deviation and the influence of external equipment on the rotor shaft 110 are determined according to the type of the single-row deep groove ball bearing 150.

Meanwhile, the installation position of the single-row deep groove ball bearing 150 needs to be determined according to the position of the magnetic center of the motor, and the positions of the single-row deep groove ball bearing 150 and the magnetic center of the rotor are required to be consistent, so that the reliability of the single-row deep groove ball bearing in operation can be ensured.

The radial position and the stress of the rotor of the motor of the double-support bearing formed by the scheme are determined by a radial sliding bearing, and the axial position and the stress are determined by a single-row deep groove ball bearing; the scheme meets the determination of the radial axial position of the large motor rotor by adopting the structure of combining the radial sliding bearing and the single-row deep groove ball bearing, and solves the problem of axial movement of the large motor rotor. The problem that the rotor of the large motor is axially positioned by external equipment and the use place of the motor is limited is perfectly solved, and potential safety hazards caused by axial movement of the motor are avoided.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A double-support type bearing is characterized by comprising a rotor shaft, a radial sliding bearing and a single-row deep groove ball bearing; the rotor shaft penetrates through the stator, and two ends of the rotor shaft are respectively arranged on the first limiting assembly and the second limiting assembly; the radial sliding bearing is positioned at one end of the stator and is arranged in the first limiting component of the rotor shaft in a penetrating way; and the single-row deep groove ball bearing is positioned at the other end of the stator and penetrates through the rotor shaft second limiting assembly.

2. A double support bearing in accordance with claim 1 further comprising a stator end cap bearing housing; the stator end cover bearing seat is arranged on the periphery of the stator.

3. A double support bearing according to claim 2 wherein the journal bearing is located at one end of the stator and is matingly connected to the stator end cap bearing housing through the rotor shaft.

4. The double support bearing of claim 1 wherein said first stop assembly is comprised of a first step disposed along a rotor shaft circle Zhou Duichen.

5. A double support bearing as claimed in claim 4, wherein the diameter of the first circular step is greater than the diameter of the journal bearing.

6. A double support bearing according to claim 1 wherein the journal bearing ports are externally provided with journal bearing housing end caps.

7. The double-support bearing of claim 2, wherein the single-row deep groove ball bearing is located at the other end of the stator and penetrates through the rotor shaft to be connected with a bearing seat of the end cover of the stator in a matching manner.

8. The dual support bearing of claim 1 wherein said second stop assembly is comprised of a second step disposed along a rotor shaft circle Zhou Duichen.

9. The double support bearing of claim 8, wherein the diameter of the second circular step is larger than the diameter of the single row deep groove ball bearing.

10. The double-support bearing as claimed in claim 6, wherein the inner ring of the single-row deep groove ball bearing is positioned by the rotor shaft, and the outer ring is sequentially provided with the adjusting pad and the sliding bearing seat end cover, and the adjusting pad and the sliding bearing seat end cover are pressed and positioned.