Bearing body structure for large vertical pump

Abstract

The utility model designs a bearing body structure for a large vertical pump, which comprises a pump body outer ring, a pump body inner ring, a pump cover, a pump cover flange, an upper bearing seat, a pump shaft, a bearing body and a bearing body lower flange, and is characterized in that the pump cover flange at the upper part of the pump cover is connected with the bearing body lower flange at the lower part of the bearing body, and a mechanical seal is arranged at the opening of the pump cover; a bearing cavity is formed in the middle of the bearing body, a self-aligning roller bearing is installed in the bearing cavity, an upper bearing seat is arranged on the upper portion of the bearing body, two angular contact ball bearings connected in series are arranged on the lower portion of the upper bearing seat, a deep groove ball bearing is arranged on the upper portion of the upper bearing seat, and a bearing cover is connected to the top of the upper bearing seat. The utility model has the advantages that the force is directly transferred to different parts of the pump body, and the vibration resistance is better. And meanwhile, the deep groove ball bearing, the angular contact ball bearing which is connected in series and the self-aligning roller bearing are optimally matched, so that the bearing burning phenomenon caused by machining concentricity deviation due to large bearing position span of the large vertical pump is better adapted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bearing body structure for large vertical pump. BACKGROUND

[0002] The bearing body structure of the prior art general vertical pump is shown in Figure 1 , double row angular contact ball bearing 21, bearing body 22, pump cover 23, pump cover upper flange 24, pump cover lower flange 25, pump body 26, cylindrical roller bearing 27, motor frame 28, motor frame lower flange 29, the bearing body is assembled on the pump cover upper flange. Double row angular contact ball bearings are arranged in the upper part of the bearing body, and cylindrical roller bearings are arranged in the lower part. The motor support is assembled on the pump cover lower flange. The large vertical pump corresponds to a high-power motor, and the vibration is large, so the existing structure needs to be enhanced to design an anti-vibration structure, and the total length of the shaft increases, so the bearing compatibility needs to be reconsidered. SUMMARY

[0003] The utility model discloses a bearing body structure for large vertical pump, reconsider bearing compatibility, enhance pump operation reliability. The utility model discloses a bearing body structure for large vertical pump, including pump body outer ring, pump body inner ring, pump cover, pump cover flange, upper bearing seat, pump shaft, bearing body, bearing body lower flange, motor frame, motor frame lower flange, its characterized in that, the upper pump cover flange of pump cover is connected with the lower bearing body lower flange of bearing body, and the filler seal is arranged at the pump cover mouth, the bearing cavity is arranged in the middle part of bearing body, the self-aligning roller bearing is installed in the bearing cavity, the upper bearing seat is arranged in the upper part of bearing body, two angular contact ball bearings in series are arranged in the lower part of upper bearing seat, the deep groove ball bearing is arranged in the upper part of upper bearing seat, and the bearing cover is connected on the top of upper bearing seat. The bearing body is small in the upper part and large in the lower part, and the bearing body lower flange side abuts against the pump body inner ring. The inner stopper is arranged in the upper part of bearing body and is used to assemble the upper bearing seat. The bearing spacer is arranged between the deep groove ball bearing and the angular contact ball bearing in series, and the upper and lower ends of the bearing spacer abut against the bearing inner ring of the deep groove ball bearing and the upper angular contact ball bearing. The utility model has the advantages that through the bearing body structure change and the pump cover, pump body structure change, the optimization of bearing compatibility, the reliability of the bearing body structure of large vertical pump is realized. The bearing body lower flange is directly connected with the pump cover and the pump body inner ring, and the motor support lower flange is connected with the pump body outer ring. Different from the conventional structure, the force is directly transmitted to different parts of the pump body, and the anti-vibration ability is better. At the same time, the optimization of the deep groove ball bearing, the angular contact ball bearing in series and the self-aligning roller bearing is more suitable for the bearing burning phenomenon caused by the machining concentricity deviation of the large vertical pump bearing position span. BRIEF DESCRIPTION OF DRAWINGS

[0004] Figure 1 It is the structural schematic diagram of prior art.

[0005] Figure 2 The utility model discloses a structure schematic view. DETAILED DESCRIPTION

[0006] The specific embodiments of the utility model are described in detail below in combination with the drawings, so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in combination with its preferred specific embodiments, these embodiments are only illustrative, not limiting the scope of the utility model.

[0007] Figure 2 One kind is bearing body structure for large vertical pump, including pump body outer ring 6, pump body inner ring 7, pump cover 8, pump cover flange 81, upper bearing seat 9, pump shaft 11, bearing body 3, bearing body lower flange 31, motor frame 5, motor frame lower flange 51, it is characterized in that, the upper pump cover flange 81 of pump cover 8 is connected with the lower bearing body lower flange 31 of bearing body 3, is provided with packing seal 12 at pump cover mouth, is provided with bearing cavity 14 in the middle of bearing body 3, is installed with self-aligning roller bearing 4 in bearing cavity 14, is provided with upper bearing seat 9 in the upper portion of bearing body 3, is provided with two angular contact ball bearings 2 in series in the lower portion of upper bearing seat 9, is provided with deep groove ball bearing 1 in the upper portion of upper bearing seat 9, is connected with bearing cover 13 in the top of upper bearing seat 9.The bearing body is small on the upper portion and big on the lower portion, and the side of bearing body lower flange 31 is in abutment with pump body inner ring 7.The upper portion of bearing body 3 is provided with inner stop 15, which is used to assemble upper bearing seat 9.The bearing spacer 10 is provided between the deep groove ball bearing 1 and the angular contact ball bearing 2 installed in series, and the upper and lower ends of the bearing spacer 10 abut the bearing inner rings of the deep groove ball bearing and the angular contact ball bearing above it.The motor frame flange 51 is connected with the pump body outer ring 6.

[0008] The upper and lower ends of the bearing spacer abut the bearing inner rings of the deep groove ball bearing and the angular contact ball bearing above it, so that the deep groove ball bearing is separated from the outer ring of the angular contact ball bearing, ensuring that the deep groove ball is not subjected to axial force. Under this structure, the deep groove ball bearing only bears radial force, and the angular contact ball bearing bears the remaining radial force and axial force. The bearing cavity is provided below the bearing body, which is used to assemble the self-aligning roller bearing. The self-aligning roller bearing has self-aligning function, which overcomes the bearing burnout phenomenon caused by the difference in concentricity of the upper and lower bearing cavities of the bearing body due to the long bearing span.

Claims

1. A bearing housing structure for a large vertical pump, comprising an outer ring of the pump body, an inner ring of the pump body, a pump cover, a pump cover flange, an upper bearing seat, a pump shaft, a bearing housing, a lower flange of the bearing housing, a motor frame, and a lower flange of the motor frame, characterized in that... The upper pump cover flange of the pump cover is connected to the lower flange of the bearing housing. A packing seal is provided at the pump cover opening. A bearing cavity is provided in the middle of the bearing housing. A self-aligning roller bearing is installed in the bearing cavity. An upper bearing housing is provided on the upper part of the bearing housing. Two angular contact ball bearings connected in series are provided on the lower part of the upper bearing housing. A deep groove ball bearing is provided on the upper part of the upper bearing housing. A bearing cover is connected to the top of the upper bearing housing.

2. The bearing housing structure for a large vertical pump according to claim 1, characterized in that, The bearing body is smaller at the top and larger at the bottom, and the lower flange side of the bearing body abuts against the inner ring of the pump body.

3. The bearing housing structure for a large vertical pump according to claim 1, characterized in that, An inner stop is provided on the upper part of the bearing body for assembling the bearing seat.

4. The bearing housing structure for a large vertical pump according to claim 1, characterized in that, A bearing spacer is provided between the deep groove ball bearing and the tandem angular contact ball bearing, with the upper and lower ends of the bearing spacer abutting against the inner rings of the deep groove ball bearing and the uppermost angular contact ball bearing.

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