Supporting structure for improving bearing temperature of thrust bearing

Abstract

The invention discloses a supporting structure for improving the temperature of a thrust pad, which comprises an elastic piece cluster arranged at the upper end of a thrust support and a supporting pad arranged at the upper end of the elastic piece cluster, and the upper end surface of the supporting pad is attached to the lower end surface of the thrust pad; a groove is formed in the upper end of the supporting tile. The elastic piece clusters are adopted as supports, the supporting eccentricity of the thrust pad can be adjusted through arrangement of the elastic piece clusters, the rigidity of the elastic piece clusters is small, the rigidity of a corresponding supporting point is small when the runner plate is heated to expand, overall deformation of the thrust pad can adapt to deformation of the runner plate, so that it is guaranteed that the thickness of an oil film is evenly distributed, and the thickness of the minimum dynamic pressure oil film is increased; therefore, the temperature of the thrust pad is not too high, and the temperature of the thrust pad is improved; in addition, the area, provided with the grooves, of the supporting pad does not make contact with the lower end face of the thrust pad, so that the supporting rigidity of the area is reduced, thermal deformation of the thrust pad is improved, and the bearing capacity of the thrust pad is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of thrust bearings, and in particular relates to a support structure for improving the temperature of a thrust bearing. Background Art

[0002] The thrust bearing is an important component of the generator set, which supports the axial load of the rotating parts of the generator set. In the thrust bearing, the upper surface of the thrust pad cooperates with the mirror plate of the rotating part to support the axial load, and the lower surface of the thrust pad is supported by the support pad. During the working process, the rotating mirror plate brings the cold lubricating oil into the gap between the thrust pad and the mirror plate and forms a dynamic oil film. The dynamic oil film also exchanges heat with the working surfaces of the thrust pad and the mirror plate and takes away the heat. In this process, the thrust pad will undergo mechanical deformation due to the force, and will also produce thermal deformation due to uneven temperature. If the deformation is severe, it will destroy the dynamic oil film formed between the thrust pad and the mirror plate, resulting in overheating failure.

[0003] In the prior art, in order to improve the deformation of the thrust bearing and enhance the bearing capacity of the thrust bearing, many forms of thrust bearing support structures have been designed, such as the multi-column support structure in the paper “Analysis and Treatment of Causes of High Temperature of Thrust Bearing Bearings of Xiaowan Hydropower Generator Sets” and the lattice column support structure disclosed in the lattice column thrust bearing support structure with publication number CN103277407A.

[0004] In the multi-column support structure, a small pillar is used between the thrust pad and the support pad. The small pillar is made of solid steel. Although it reduces the deformation of the thrust pad and the stress concentration in the middle of the thrust pad, its rigidity is relatively large, and it loses the function of the multi-point support structure to automatically adjust the deformation of the thrust pad. That is, when the mirror plate deforms under the action of thermal stress, the thrust pad concave deformation at the support point is small, which will cause the thickness of the partial dynamic pressure oil film between the thrust pad and the mirror plate to be reduced and unevenly distributed, thereby causing the thrust pad temperature to be too high.

[0005] In the grid column support structure, the stiffness corresponding to the support position cannot be adjusted, and the flexible support structure loses the function of adjusting the thrust bearing stress and improving the bearing temperature. Summary of the invention

[0006] In order to overcome the defects of the prior art, the present invention provides a support structure for improving the temperature of the thrust bearing, which can improve the temperature of the thrust bearing and enhance the bearing capacity of the thrust bearing.

[0007] The object of the present invention is achieved through the following technical solutions:

[0008] A support structure for improving thrust bearing temperature comprises an elastic member cluster arranged at the upper end of a thrust support and a support bearing arranged at the upper end of the elastic member cluster, wherein the upper end surface of the support bearing is fitted to the lower end surface of the thrust bearing; and a groove is provided at the upper end of the support bearing.

[0009] The beneficial effects of adopting the above technical solution are: by adopting an elastic member cluster as a support, the support eccentricity of the thrust washer can be adjusted by arranging the elastic member cluster, and the stiffness of the elastic member cluster is small, and the stiffness of the corresponding support point when the mirror plate expands due to heat is small, and the overall deformation of the thrust washer can be adapted to the deformation of the mirror plate to ensure uniform distribution of the oil film thickness and increase the minimum dynamic pressure oil film thickness, thereby ensuring that the thrust washer temperature is not too high, thereby improving the thrust washer temperature; in addition, the area where the groove is opened on the support washer does not contact the lower end surface of the thrust washer, so as to reduce the support stiffness of the area, thereby improving the thermal deformation of the thrust washer, and thereby improving the bearing capacity of the thrust washer.

[0010] In one embodiment, the support structure for improving the temperature of the thrust pads includes a spacer block disposed between two adjacent thrust pads and a limit plate for cooperating with the spacer block to limit the horizontal movement of the elastic member cluster;

[0011] The support structure for improving the temperature of the thrust bearing includes a first hook plate for limiting the upward movement of the bearing and cooperating with a spacer block to limit the horizontal movement of the bearing, and the spacer block, the limit plate and the first hook plate are all fixedly connected to the thrust bearing;

[0012] The support structure for improving the temperature of the thrust pad comprises a second hook plate and a third hook plate for limiting the upward movement of the thrust pad, the second hook plate is fixedly connected to the support pad, and the third hook plate is fixedly connected to the spacer block.

[0013] The beneficial effects of adopting the above technical solution are as follows: the spacer block and the limit plate jointly limit the horizontal movement of the elastic member cluster so that the elastic member cluster can only provide elastic support vertically; the spacer block and the first hook plate jointly limit the horizontal movement of the support shoe, and the first hook plate can limit the upward movement of the support shoe, so as to press the support shoe together with the elastic member cluster on the thrust support without affecting the downward movement of the support shoe; the second hook plate and the third hook plate cooperate to limit the upward movement of the thrust shoe, so as to press the thrust shoe on the support shoe without affecting the downward movement of the thrust shoe.

[0014] In one embodiment, the spacer blocks on both sides of the elastic member cluster are arranged in an "eight" shape, and the first hook plate is fixedly connected to the outer side of the thrust bearing.

[0015] The beneficial effect of adopting the above technical solution is that the spacer blocks on both sides of the elastic member cluster are arranged in an "eight" shape, that is, the inner side spacing of the two spacer blocks is small, and the outer side spacing of the two spacer blocks is large. In other words, the inner sides of the two spacer blocks and themselves can cooperate with the first hook plate on the outer side to jointly limit the horizontal movement of the support.

[0016] In one embodiment, two first hook plates are symmetrically arranged on the outer side of the support pad.

[0017] In one embodiment, a first strip groove is provided on the outer side of the support shoe in the horizontal direction, the hook portion of the first hook plate is hung on the first strip groove, and the groove width of the first strip groove is greater than the thickness of the hook portion of the first hook plate.

[0018] The beneficial effect of adopting the above technical solution is that such an arrangement can limit the upward movement of the support shoe, and does not limit the downward movement of the support shoe to a certain extent.

[0019] In one embodiment, two second hook plates are symmetrically arranged on the outer side of the thrust washer.

[0020] In one embodiment, a second strip groove is provided on the outer side of the thrust washer in the horizontal direction, the hook portion of the second hook plate is hung on the second strip groove, and the groove width of the second strip groove is greater than the thickness of the hook portion of the second hook plate.

[0021] The beneficial effect of adopting the above technical solution is that such an arrangement can limit the upward movement of the outer side of the thrust washer and does not limit the downward movement of the outer side of the thrust washer to a certain extent.

[0022] In one embodiment, two third hook plates are symmetrically arranged on the inner side of the thrust washer.

[0023] In one embodiment, a third strip groove is provided on the inner side of the thrust washer in the horizontal direction, the hook portion of the third hook plate is hung on the third strip groove, and the groove width of the third strip groove is greater than the thickness of the hook portion of the third hook plate.

[0024] The beneficial effect of adopting the above technical solution is that such an arrangement can limit the upward movement of the inner side of the thrust washer and does not limit the downward movement of the inner side of the thrust washer to a certain extent.

[0025] In one embodiment, the spacer block, the limiting plate and the first hook plate are all bolted to the thrust bearing, the second hook plate is bolted to the support shoe, and the third hook plate is bolted to the spacer block.

[0026] The beneficial effect of adopting the above technical solution is: such arrangement makes it convenient to install or disassemble the support structure.

[0027] The beneficial effects of the present invention are:

[0028] By using a cluster of elastic parts as a support, the support eccentricity of the thrust washer can be adjusted by arranging the cluster of elastic parts, and the stiffness of the cluster of elastic parts is small. When the mirror plate expands due to heat, the stiffness of the corresponding support point is small, and the overall deformation of the thrust washer can adapt to the deformation of the mirror plate to ensure that the oil film thickness is evenly distributed and the minimum dynamic pressure oil film thickness is increased, thereby ensuring that the thrust washer temperature is not too high, thereby improving the thrust washer temperature; in addition, the area where the groove is opened on the support washer does not contact the lower end surface of the thrust washer to reduce the support stiffness of the area, thereby improving the thermal deformation of the thrust washer and further improving the bearing capacity of the thrust washer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0030] Figure 1 Shows a schematic diagram of the structure of the present invention;

[0031] Figure 2 A schematic diagram showing the installation of the elastic member cluster in the present invention is shown;

[0032] Figure 3 A schematic diagram showing the structure of the outer side of the present invention is shown;

[0033] Figure 4 A schematic diagram of the structure of the inner side of the present invention is shown;

[0034] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0035] Reference numerals:

[0036] 1-thrust washer, 101-second strip groove, 102-third strip groove, 2-support washer, 201-groove, 202-first strip groove, 3-elastic member cluster, 4-thrust support, 5-spacer block, 6-limiting plate, 7-first hook plate, 8-second hook plate, 9-third hook plate. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] The present invention provides a support structure for improving the temperature of thrust bearings, such as Figure 1 As shown, it includes an elastic member cluster 3 placed on the upper end of a thrust support 4 and a support pad 2 placed on the upper end of the elastic member cluster 3, the upper end surface of the support pad 2 is in contact with the lower end surface of the thin thrust pad 1; a groove 201 is provided on the upper end of the support pad 2, and the horizontal position of the groove 201 matches the horizontal position of the high-temperature and low-oil-film area on the dynamic pressure oil film; wherein, the high-temperature and low-oil-film area on the dynamic pressure oil film can be determined based on the three-dimensional thermoelastic flow calculation results.

[0039] It can be understood that by using the elastic member cluster 3 as the support, the support eccentricity of the thrust washer 1 can be adjusted by arranging the elastic member cluster 3, and the stiffness of the elastic member cluster 3 is small. When the mirror plate expands due to heat, the stiffness of the corresponding support point is small, and the overall deformation of the thrust washer 1 can adapt to the deformation of the mirror plate to ensure that the oil film thickness is evenly distributed and the minimum dynamic pressure oil film thickness is increased, thereby ensuring that the temperature of the thrust washer 1 is not too high, thereby improving the thrust washer 1 temperature; in addition, the area where the groove 201 is opened on the support washer 2 does not contact the lower end surface of the thrust washer 1, so as to reduce the support stiffness of the area, thereby improving the thermal deformation of the thrust washer 1, and thereby improving the bearing capacity of the thrust washer 1.

[0040] It should be noted that when the groove 201 is not provided on the support bearing 2 in the area corresponding to the high-temperature and low-oil-film zone, the thrust bearing 1 will bulge upward due to the influence of the high temperature, so that the oil film thickness here is relatively low; and when the groove 201 is provided on the support bearing 2 in the area corresponding to the high-temperature and low-oil-film zone, the support stiffness of the area can be reduced, so that the thrust bearing 1 can be appropriately concave in the area, and part of the upward convex amount can be offset by the concave amount to reduce the upward convex shape variable of the thrust bearing 1 in the area, thereby increasing the oil film thickness in the area, and then avoiding the temperature of the area from continuing to rise or appropriately reducing the temperature of the area to improve the thrust bearing 1 temperature.

[0041] It should also be noted that the elastic member cluster 3 can be a spring cluster, specifically a plurality of springs arranged in a cluster; the horizontal cross-sectional shape of the groove 201 is preferably circular; the thrust support 4 can be a thrust support ring plate or a thrust bearing seat; in addition, keyways can be provided at the ends of the thrust bearing 1 and the support bearing 2 that are close to each other, so that the thrust bearing 1 and the support bearing 2 can be connected by a key, thereby preventing relative horizontal movement between the thrust bearing 1 and the support bearing 2.

[0042] In one embodiment, Figure 2-4 As shown, the support structure for improving the temperature of the thrust pads includes a spacer block 5 arranged between two adjacent thrust pads 1 and a limit plate 6 for cooperating with the spacer block 5 to limit the horizontal movement of the elastic member cluster 3;

[0043] The support structure for improving the temperature of the thrust bearing includes a first hook plate 7 for limiting the upward movement of the bearing 2 and cooperating with the spacer block 5 to limit the horizontal movement of the bearing 2. The spacer block 5, the limit plate 6 and the first hook plate 7 are all fixedly connected to the thrust support 4.

[0044] The support structure for improving the temperature of the thrust bearing includes a second hook plate 8 and a third hook plate 9 for limiting the upward movement of the thrust bearing 1. The second hook plate 8 is fixedly connected to the support bearing 2, and the third hook plate 9 is fixedly connected to the spacer block 5.

[0045] It can be understood that the spacer block 5 and the limit plate 6 jointly limit the horizontal movement of the elastic member cluster 3 so that the elastic member cluster 3 can only provide elastic support vertically; the spacer block 5 and the first hook plate 7 jointly limit the horizontal movement of the support bearing 2, and the first hook plate 7 can limit the upward movement of the support bearing 2, so as to press the support bearing 2 together with the elastic member cluster 3 on the thrust support 4 without affecting the downward movement of the support bearing 2; the second hook plate 8 and the third hook plate 9 cooperate to limit the upward movement of the thrust bearing 1, so as to press the thrust bearing 1 on the support bearing 2 without affecting the downward movement of the thrust bearing 1.

[0046] In one embodiment, the spacer blocks 5 on both sides of the elastic member cluster 3 are arranged in an "eight" shape, and the first hook plate 7 is fixedly connected to the outer side of the thrust bearing 4.

[0047] It can be understood that the spacer blocks 5 on both sides of the elastic member cluster 3 are arranged in an "eight" shape, that is, the inner side spacing of the two spacer blocks 5 is small, and the outer side spacing of the two spacer blocks 5 is large. In other words, the inner sides of the two spacer blocks 5 and themselves can cooperate with the first hook plate 7 on the outer side to jointly limit the horizontal movement of the support 2.

[0048] It should be noted that two sides of the support pad 2 are in contact with two spacer blocks 5 respectively, that is, the two spacer blocks 5 can provide a guide for the vertical movement of the support pad 2 .

[0049] In one embodiment, two first hook plates 7 are symmetrically arranged on the outer side of the support pad 2 .

[0050] In one embodiment, a first strip groove 202 is provided on the outer side of the support 2 in the horizontal direction, and the hook portion of the first hook plate 7 is hung on the first strip groove 202. The groove width of the first strip groove 202 is greater than the thickness of the hook portion of the first hook plate 7, so as to limit the upward movement of the support 2, and to a certain extent, does not limit the downward movement of the support 2.

[0051] In one embodiment, two second hook plates 8 are symmetrically arranged on the outer side of the thrust washer 1 .

[0052] In one embodiment, a second strip groove 101 is provided on the outer side of the thrust washer 1 in the horizontal direction, and the hook portion of the second hook plate 8 is hung on the second strip groove 101. The groove width of the second strip groove 101 is greater than the thickness of the hook portion of the second hook plate 8, so as to limit the upward movement of the outer side of the thrust washer 1 and not limit the downward movement of the outer side of the thrust washer 1 to a certain extent.

[0053] In one embodiment, two third hook plates 9 are symmetrically arranged on the inner side of the thrust washer 1 .

[0054] In one embodiment, a third strip groove 102 is provided on the inner side of the thrust washer 1 along the horizontal direction, and the hook portion of the third hook plate 9 is hung on the third strip groove 102. The groove width of the third strip groove 102 is greater than the thickness of the hook portion of the third hook plate 9, so as to limit the upward movement of the inner side of the thrust washer 1 and not limit the downward movement of the inner side of the thrust washer 1 to a certain extent.

[0055] In one embodiment, the spacer block 5, the limit plate 6 and the first hook plate 7 are all bolted to the thrust bearing 4, the second hook plate 8 is bolted to the support 2, and the third hook plate 9 is bolted to the spacer block 5 to facilitate the installation or disassembly of the support structure.

[0056] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A support structure for improving the temperature of thrust bearings, characterized in that: It comprises an elastic member cluster (3) disposed at the upper end of a thrust support (4) and a support washer (2) disposed at the upper end of the elastic member cluster (3); the upper end surface of the support washer (2) is in contact with the lower end surface of the thrust washer (1); and a groove (201) is provided at the upper end of the support washer (2).

2. A support structure for improving thrust bearing temperature according to claim 1, characterized in that: It comprises a spacer block (5) arranged between two adjacent thrust pads (1) and a limit plate (6) used for cooperating with the spacer block (5) to limit the horizontal movement of the elastic member cluster (3); It comprises a first hook plate (7) for limiting the upward movement of the support shoe (2) and cooperating with the spacer block (5) to limit the horizontal movement of the support shoe (2); the spacer block (5), the limit plate (6) and the first hook plate (7) are all fixedly connected to the thrust support (4); It comprises a second hook plate (8) and a third hook plate (9) for limiting the upward movement of the thrust washer (1); the second hook plate (8) is fixedly connected to the support washer (2), and the third hook plate (9) is fixedly connected to the spacer block (5).

3. A support structure for improving thrust bearing temperature according to claim 2, characterized in that: The spacer blocks (5) on both sides of the elastic member cluster (3) are arranged in an "eight" shape, and the first hook plate (7) is fixedly connected to the outer side of the thrust support (4).

4. A support structure for improving thrust bearing temperature according to claim 3, characterized in that: Two first hook plates (7) are symmetrically arranged on the outer side of the support shoe (2).

5. A support structure for improving thrust bearing temperature according to claim 3 or 4, characterized in that: A first strip groove (202) is arranged on the outer side of the support shoe (2) in the horizontal direction, and the hook portion of the first hook plate (7) is hung on the first strip groove (202), and the groove width of the first strip groove (202) is greater than the thickness of the hook portion of the first hook plate (7).

6. A support structure for improving thrust bearing temperature according to claim 2, characterized in that: Two second hook plates (8) are symmetrically arranged on the outer side of the thrust washer (1).

7. A support structure for improving thrust bearing temperature according to claim 6, characterized in that: A second strip groove (101) is provided on the outer side of the thrust washer (1) in the horizontal direction, the hook portion of the second hook plate (8) is hung on the second strip groove (101), and the groove width of the second strip groove (101) is greater than the thickness of the hook portion of the second hook plate (8).

8. The support structure for improving the temperature of thrust bearings according to claim 2, characterized in that: Two third hook plates (9) are symmetrically arranged on the inner side of the thrust washer (1).

9. A support structure for improving thrust bearing temperature according to claim 8, characterized in that: A third strip groove (102) is arranged on the inner side of the thrust washer (1) in the horizontal direction, and the hook portion of the third hook plate (9) is hung on the third strip groove (102), and the groove width of the third strip groove (102) is greater than the thickness of the hook portion of the third hook plate (9).

10. A support structure for improving thrust bearing temperature according to claim 2, characterized in that: The spacer block (5), the limit plate (6) and the first hook plate (7) are all bolted to the thrust support (4), the second hook plate (8) is bolted to the support bearing (2), and the third hook plate (9) is bolted to the spacer block (5).

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