A flange end cover specially used for sliding bearing

Abstract

The present invention provides a flange end cover specially used for a sliding bearing, comprising a flange front cover, a flange rear cover and supporting ribs arranged between the flange front cover and the flange rear cover; the flange front cover is fixedly connected to the load flange, and the flange rear cover is fixedly connected to the motor body; the sliding bearing is fixed in a sliding bearing mounting hole provided on the flange rear cover by bolts to support the rotating shaft of the motor, and the rotating shaft passes through the sliding bearing and the rotating shaft hole provided on the flange front cover in turn to pass through the flange end cover; the supporting ribs are trapezoidal and are circumferentially welded between the flange front cover and the flange rear cover; the present invention utilizes trapezoidal reinforcing ribs welded circumferentially between the flange front cover and the flange rear cover to ensure the strength of the flange end cover and facilitate the disassembly and maintenance of the sliding bearing; further, the flange front cover is fixedly connected to the load flange, and the flange rear cover is fixedly connected to the motor body, which can also ensure the integrity of the flange end cover and the motor and avoid vibration caused by a single-sided fixing method.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a flange end cover dedicated to a sliding bearing. Background Art

[0002] Air conditioning compressor manufacturers are mainly the four major American companies (Carrier, York, McQuay, and Trane) and some other small compressor manufacturers, and they generally implement the American NEMA standard.

[0003] The driving motor of the air-conditioning compressor generally uses a motor with a flange end cover, and the motor and flange connection dimensions comply with the NEMA standard; when the motor power is small, the motor uses a rolling bearing, and the flange end cover has a simple and reliable structure; however, when the motor power is large, a sliding bearing must be used, which requires that the design not only considers the strength and rigidity of the flange end cover, but also the convenience of installation, disassembly and maintenance of the sliding bearing, which makes the design difficult; however, the existing flange end cover cannot meet the requirements, and there are mainly the following problems:

[0004] First, the two ends of the flange end cover are connected and installed to the load and the motor body respectively. Since the torque changes greatly when the load such as the compressor is running, the flange end cover is subjected to greater force, and large vibration problems are prone to occur during system operation.

[0005] Secondly, the sliding bearing is fixed on the flange end cover, which will cause inconvenience in the installation, disassembly and maintenance of the sliding bearing; excessively increasing the overall dimensions of the flange end cover can meet the requirements, but will increase the risk of system vibration, while increasing material costs and reducing the strength and rigidity of the flange end cover. Summary of the invention

[0006] The purpose of the present invention is to provide a flange end cover dedicated to a sliding bearing, which is used to solve the problem that the existing flange end cover has an unreasonable structure, resulting in large vibration when the motor is running and inconvenient maintenance of the sliding bearing.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A flange end cover specially used for a sliding bearing comprises a flange front cover, a flange rear cover and support ribs arranged between the flange front cover and the flange rear cover; the flange front cover is fixedly connected to a load flange, and the flange rear cover is fixedly connected to a motor body; the sliding bearing is fixed by bolts in a sliding bearing mounting hole provided on the flange rear cover to support the rotating shaft of the motor, and the shaft extension end shaft passes through the sliding bearing and the rotating shaft hole provided on the flange front cover in turn to pass out of the flange end cover; the support ribs are trapezoidal and are welded circumferentially between the flange front cover and the flange rear cover.

[0009] There are eight support ribs, six of which are welded radially along the flange rear cover around the sliding bearing mounting hole with the flange rear cover as the center, and two support ribs are vertically welded around the upper part of the sliding bearing mounting hole.

[0010] The inner diameter and outer diameter of the bearing hole on the flange front cover and the outer diameter of the flange front cover are all left with margins for fine machining of the dimensions after welding.

[0011] The flange rear cover is also provided with a measuring air gap hole and a bearing temperature measuring lead hole.

[0012] The flange front cover, flange rear cover and supporting ribs are all made of Q235A steel plates.

[0013] Beneficial effects of the present invention:

[0014] The flange end cover specially used for sliding bearings described in the present invention utilizes trapezoidal reinforcing ribs welded circumferentially between the flange front cover and the flange rear cover to ensure the strength of the flange end cover and facilitate the disassembly and maintenance of the sliding bearing; further, the flange front cover is fixedly connected to the load flange, and the flange rear cover is fixedly connected to the motor body, which can also ensure the integrity of the flange end cover and the motor and avoid vibration caused by a single-sided fixing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the flange end cover of the present invention;

[0017] Figure 2 This is a schematic diagram of the welding position of the support ribs of the present invention;

[0018] Figure 3 This is a schematic diagram of the present invention installed on a motor. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown: the flange end cover dedicated to the sliding bearing described in the present invention comprises a flange front cover 1, a flange rear cover 2 and a support rib 3 arranged between the flange front cover 1 and the flange rear cover 2; the flange front cover 1 is fixedly connected to the load flange 7, and the flange rear cover 2 is fixedly connected to the motor body 8; the sliding bearing is fixed in the sliding bearing mounting hole 4 opened on the flange rear cover 2 by bolts to support the rotating shaft of the motor, and the shaft extension end shaft passes through the sliding bearing and the rotating shaft hole opened on the flange front cover 1 in turn to pass through the flange end cover; the support rib 3 is trapezoidal and is welded circumferentially between the flange front cover 1 and the flange rear cover 2; preferably, between the flange front cover 1 and the load flange 7, between the flange rear cover 2 and the motor body 8 (bearing end cover) The spaces are fixed with bolts for easy disassembly and maintenance; further, the sliding bearing mounting hole 4 is semicircular at the bottom and arched at the top, and the inner diameter of the shaft hole, the outer diameter of the flange front cover 1 and the thickness of the flange front cover 1 are all left with margins. During installation, after welding, the flange front cover 1 is finely processed in size according to actual needs using the margins; further, the support ribs 3 are arranged at a position that avoids the installation position of the sliding bearing to prevent the position of the support ribs 3 from interfering with the position of the sliding bearing, thereby affecting the disassembly and maintenance of the sliding bearing; further, the flange end cover adopts a steel plate welding structure, the support ribs 3 adopt a trapezoidal structure and a specially designed position, with a compact appearance, thereby increasing the strength and rigidity of the end cover and reducing the vibration of the motor during operation.

[0021] The flange end cover specially used for sliding bearings described in the present invention utilizes trapezoidal reinforcing ribs welded circumferentially between the flange front cover 1 and the flange rear cover 2 to ensure the strength of the flange end cover and facilitate the disassembly and maintenance of the sliding bearing; further, the flange front cover 1 is fixedly connected to the load flange 7, and the flange rear cover 2 is fixedly connected to the motor body 8, which can also ensure the integrity of the flange end cover and the motor and avoid vibration caused by a single-sided fixing method.

[0022] The preferred solution is: there are 8 support ribs 3, of which 6 support ribs 3 are welded radially along the flange back cover 2 around the sliding bearing mounting hole 4 with the flange back cover 2 as the center, and 2 support ribs 3 are vertically welded around the upper part of the sliding bearing mounting hole 4; specifically, the 2 vertically welded support ribs 3 are welded on both sides of the arched part of the sliding bearing mounting hole 4, and the 6 support ribs 3 radially welded along the flange back cover 2 are evenly distributed around the semicircular part of the sliding bearing mounting hole 4, thereby ensuring the uniformity of the supporting force of the support ribs 3, and thus strengthening the rigidity of the flange end cover without changing the overall structure of the flange end cover; further, it can also avoid interference with the support ribs 3 during the installation of the sliding bearing, thereby facilitating the disassembly and maintenance of the sliding bearing.

[0023] The preferred solution is that the inner diameter, outer diameter of the bearing hole on the flange front cover and the outer diameter of the flange front cover are all left with margins for fine machining of the dimensions after welding and for facilitating the adjustment of the shaft extension dimensions (flange end face and shaft extension end face) when the motor magnetic centerline is in position.

[0024] The preferred solution is: the flange rear cover 2 is also provided with a measuring air gap hole 6 and a bearing temperature measurement lead hole 5; specifically, the measuring air gap hole 6 is two M30-6H type holes for checking the air gap; the bearing temperature measurement lead hole 5 is a 4XM6 type hole for fixing the bearing temperature measurement lead.

[0025] The preferred solution is: the flange front cover 1, flange rear cover 2 and support ribs 3 are all made of Q235A steel plate; Q235A has good toughness and plasticity, a certain elongation, good welding performance and hot workability, and ensures the stability of the flange end cover during welding.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flange end cover for a sliding bearing, characterized in that: It comprises a flange front cover, a flange rear cover and support ribs arranged between the flange front cover and the flange rear cover; the flange front cover is fixedly connected to the load flange, and the flange rear cover is fixedly connected to the motor body; the sliding bearing is fixed in the sliding bearing mounting hole provided on the flange rear cover by bolts to support the rotating shaft of the motor, and the shaft extension end shaft passes through the sliding bearing and the rotating shaft hole provided on the flange front cover in turn to pass through the flange end cover; the support ribs are trapezoidal and are welded circumferentially between the flange front cover and the flange rear cover; There are 8 support ribs, 6 of which are welded radially around the sliding bearing mounting hole along the flange rear cover with the flange rear cover as the center, and 2 support ribs are vertically welded around the upper part of the sliding bearing mounting hole; The inner diameter and outer diameter of the bearing hole on the flange front cover and the outer diameter of the flange front cover are all left with margins for fine machining of the dimensions after welding.

2. The flange end cover for sliding bearing according to claim 1, characterized in that: The flange rear cover is also provided with a measuring air gap hole and a bearing temperature measuring lead hole.

3. The flange end cover for sliding bearing according to claim 1, characterized in that: The flange front cover, flange rear cover and supporting ribs are all made of Q235A steel plates.

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