Supporting structure for improving bearing temperature of thrust bearing

Abstract

The utility model 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 face of the supporting pad is attached to the lower end face of the thrust pad; a groove is formed in the upper end of the supporting tile. According to the utility model, the elastic piece cluster is used as a support, so that the support eccentricity of the thrust pad can be adjusted through the arrangement of the elastic piece cluster, the rigidity of the elastic piece cluster is small, the rigidity of a corresponding support point is small when the runner plate is heated and expanded, and the overall deformation of the thrust pad can adapt to the deformation of the runner plate so as to ensure the uniform distribution of the thickness of an oil film; the thickness of the minimum dynamic pressure oil film is increased, so that 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 utility model belongs to the technical field of thrust bearing, especially relates to a support structure for improving thrust pad temperature. BACKGROUND

[0002] Thrust bearing is an important component of generator set, which supports the axial load of 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 supporting pad. In the working process, the rotating mirror plate brings cold lubricating oil into the gap between the thrust pad and the mirror plate and forms a dynamic pressure oil film. The dynamic pressure oil film exchanges heat with the working surface of the thrust pad and the mirror plate and carries away heat. In this process, the thrust pad will be mechanically deformed due to stress, and will also be thermally deformed due to uneven temperature. When the deformation is serious, the dynamic pressure oil film formed between the thrust pad and the mirror plate will be destroyed, resulting in overheating failure.

[0003] In the prior art, in order to improve the deformation of the thrust pad and improve the carrying capacity of the thrust pad, many forms of thrust pad support structures are designed, such as the multi-column support structure in the paper "Analysis and Treatment of High Temperature of Xiaowan Hydroelectric Generator Set Thrust Bearing Pad", and the grid column type thrust bearing support structure disclosed in the grid column type thrust bearing support structure with publication number CN103277407A.

[0004] In the multi-column support structure, small columns are used to support between the thrust pad and the supporting pad. The small columns are made of solid steel, which reduces the deformation of the thrust pad and the stress concentration in the middle of the thrust pad, but the rigidity is large, and the function of automatically adjusting the deformation of the thrust pad of the multi-point support structure is lost. That is, when the mirror plate is deformed under the action of thermal stress, the concave deformation of the thrust pad at the support point is small, which will lead to the decrease of the thickness of the dynamic pressure oil film between the thrust pad and the mirror plate and the uneven distribution, thereby causing the thrust pad temperature to be too high.

[0005] In the grid column type support structure, the rigidity at the support position is not adjustable, and the function of adjusting the stress of the thrust pad and improving the pad temperature of the flexible support structure is lost. UTILITY MODEL CONTENTS

[0006] The utility model discloses a support structure for improving the pad temperature of the thrust pad, which can improve the pad temperature of the thrust pad and improve the carrying capacity of the thrust pad.

[0007] The utility model discloses a support structure for improving the pad temperature of the thrust pad, which can improve the pad temperature of the thrust pad and improve the carrying capacity of the thrust pad.

[0008] A support structure for improving the pad temperature of the thrust pad, which comprises a cluster of elastic members placed on the upper end of the thrust support and a supporting pad placed on the upper end of the cluster of elastic members. 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 pad.

[0009] The beneficial effects of the above technical solutions are that: the elastic piece cluster is used as the support, the support eccentricity of the thrust pad can be adjusted by arranging the elastic piece cluster, the rigidity of the elastic piece cluster is small, the rigidity of the corresponding support point of the mirror plate when the mirror plate is expanded by heat is small, the overall deformation of the thrust pad can be adapted to the deformation of the mirror plate, so as to ensure that the oil film thickness is uniformly distributed and the minimum dynamic pressure oil film thickness is increased, thereby ensuring that the temperature of the thrust pad is not too high, and further improving the thrust pad temperature; in addition, the area of the recess provided on the support pad is not in contact with the lower end surface of the thrust pad, so as to reduce the support rigidity of the area, thereby improving the thermal deformation of the thrust pad, and further improving the carrying capacity of the thrust pad.

[0010] In one embodiment, the support structure for improving the thrust pad temperature includes a spacing block arranged between two adjacent thrust pads and a limiting plate for limiting the horizontal movement of the elastic piece cluster in cooperation with the spacing block.

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

[0012] The support structure for improving the thrust pad temperature includes 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 spacing block.

[0013] The beneficial effects of the above technical solutions are that: the spacing block and the limiting plate jointly limit the horizontal movement of the elastic piece cluster, so that the elastic piece cluster can only provide vertical elastic support; the spacing block and the first hook plate jointly limit the horizontal movement of the support pad, and the first hook plate can limit the upward movement of the support pad, so that the support pad is pressed on the thrust support together with the elastic piece cluster and does not affect the downward movement of the support pad; the second hook plate and the third hook plate cooperate to limit the upward movement of the thrust pad, so that the thrust pad is pressed on the support pad and does not affect the downward movement of the thrust pad.

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

[0015] The beneficial effects of the above technical solutions are that: the spacing blocks on both sides of the elastic piece cluster are arranged in an "eight" shape, that is, the inner side distance of the two spacing blocks is small, the outer side distance of the two spacing blocks is large, that is, the inner side of the two spacing blocks and the first hook plate on the outer side thereof can jointly limit the horizontal movement of the support pad.

[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 towa in a horizontal direction, and the hook portion of the first hook plate is hung on the first strip groove. The width of the first strip groove is greater than the thickness of the hook portion of the first hook plate.

[0018] The beneficial effects of adopting the above technical solution are: this setting can restrict the upward movement of the toe, and to a certain extent does not restrict the downward movement of the toe.

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

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

[0021] The beneficial effects of adopting the above technical solution are: this setting can restrict the upward movement of the outer side of the thrust bearing and, to a certain extent, does not restrict the downward movement of the outer side of the thrust bearing.

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

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

[0024] The beneficial effects of adopting the above technical solution are: this setting can restrict the upward movement of the inner side of the thrust bearing and, to a certain extent, does not restrict the downward movement of the inner side of the thrust bearing.

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

[0026] The beneficial effects of adopting the above technical solution are: this setting facilitates the installation or disassembly of the support structure.

[0027] The beneficial effects of this utility model are as follows:

[0028] By using elastic element clusters as supports, the eccentricity of the thrust bearing can be adjusted through the arrangement of the elastic element clusters. The elastic element clusters have low stiffness, and the stiffness of the corresponding support points is low when the mirror plate expands due to heat. The overall deformation of the thrust bearing can adapt to the deformation of the mirror plate, ensuring a uniform distribution of oil film thickness and increasing the minimum dynamic pressure oil film thickness. This prevents the thrust bearing temperature from becoming too high, thereby improving the thrust bearing temperature. In addition, the area with grooves on the support pad does not contact the lower end face of the thrust bearing, reducing the support stiffness in that area, thereby improving the thermal deformation of the thrust bearing and increasing its load-bearing capacity. Attached Figure Description

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

[0030] in:

[0031] Figure 1 A schematic diagram of the structure of this utility model is shown;

[0032] Figure 2 A schematic diagram of the installation of the elastic element cluster in this utility model is shown;

[0033] Figure 3 A schematic diagram of the external structure of this utility model is shown;

[0034] Figure 4 This shows a schematic diagram of the inner structure of the present invention;

[0035] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0036] Figure label:

[0037] 1-Thrust pad, 101-Second strip groove, 102-Third strip groove, 2-Support pad, 201-Groove, 202-First strip groove, 3-Elastic element cluster, 4-Thrust support, 5-Spacer block, 6-Limiting plate, 7-First hook plate, 8-Second hook plate, 9-Third hook plate. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings.

[0039] This utility model provides a support structure for improving the temperature of thrust bearings, such as... Figure 1 As shown, it includes an elastic element cluster 3 placed on the upper end of the thrust support 4 and a bearing 2 placed on the upper end of the elastic element cluster 3. The upper end surface of the bearing 2 is attached to the lower end surface of the thin thrust bearing 1. A groove 201 is provided at the upper end of the bearing 2. The horizontal position of the groove 201 matches the horizontal position of the high temperature and low oil film area on the hydrodynamic oil film. The high temperature and low oil film area on the hydrodynamic oil film can be determined according to the three-dimensional thermo-elastic flow calculation results.

[0040] It can be understood that the elastic piece cluster 3 is used as the support, that is, the support eccentricity of the thrust pad 1 can be adjusted through the arrangement of the elastic piece cluster 3, the rigidity of the elastic piece cluster 3 is small, the rigidity of the corresponding support point of the mirror plate when the mirror plate is expanded by heat is small, the overall deformation of the thrust pad 1 can be adapted to the deformation of the mirror plate, so as to ensure that the oil film thickness is uniformly distributed, and the minimum dynamic pressure oil film thickness is increased, thereby ensuring that the temperature of the thrust pad 1 is not too high, and then improving the pad temperature of the thrust pad 1; in addition, the area where the groove 201 is arranged on the support pad 2 is not in contact with the lower end surface of the thrust pad 1, so as to reduce the support rigidity of the area, thereby improving the thermal deformation of the thrust pad 1, and then improving the carrying capacity of the thrust pad 1.

[0041] It should be noted that when the groove 201 is not arranged on the support pad 2 in the corresponding area of the high-temperature low-oil-film area, the thrust pad 1 will be convex upward under the influence of high temperature, so that the oil film thickness at this position is low; when the groove 201 is arranged on the support pad 2 in the corresponding area of the high-temperature low-oil-film area, the support rigidity of the area can be reduced, so that the thrust pad 1 can be appropriately concave in the area, and the concave amount is used to offset part of the convex amount, so as to reduce the convex deformation amount of the thrust pad 1 in the area, thereby increasing the oil film thickness of the area, and then avoiding the temperature of the area from continuing to rise or appropriately reducing the temperature of the area, so as to improve the pad temperature of the thrust pad 1.

[0042] It should be further noted that the elastic piece cluster 3 can be a spring cluster, specifically a plurality of springs arranged in clusters; 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, one end of the thrust pad 1 and the support pad 2 close to each other can be provided with a key groove, so that the thrust pad 1 and the support pad 2 can be connected by a key, thereby preventing the relative horizontal movement between the thrust pad 1 and the support pad 2.

[0043] In one embodiment, as shown in Figures 2-4 the support structure for improving the pad temperature of the thrust pad includes a spacing block 5 arranged between two adjacent thrust pads 1 and a limiting plate 6 for limiting the horizontal movement of the elastic piece cluster 3 in cooperation with the spacing block 5;

[0044] The support structure for improving the pad temperature of the thrust pad includes a first hook plate 7 for limiting the upward movement of the support pad 2 and cooperating with the spacing block 5 to limit the horizontal movement of the support pad 2; the spacing block 5, the limiting plate 6 and the first hook plate 7 are all fixedly connected on the thrust support 4;

[0045] The support structure for improving the pad temperature of the thrust pad includes a second hook plate 8 and a third hook plate 9 for limiting the upward movement of the thrust pad 1; the second hook plate 8 is fixedly connected on the support pad 2, and the third hook plate 9 is fixedly connected on the spacing block 5.

[0046] It can be understood that the spacer blocks 5 and the limiting plates 6 jointly limit the horizontal movement of the elastic piece cluster 3, so that the elastic piece cluster 3 can only provide elastic support vertically; the spacer blocks 5 and the first hook plates 7 jointly limit the horizontal movement of the support wafer 2, and the first hook plates 7 can limit the upward movement of the support wafer 2, so as to press the support wafer 2 together with the elastic piece cluster 3 on the thrust support 4 and not affect the downward movement of the support wafer 2; the second hook plates 8 and the third hook plates 9 cooperate to limit the upward movement of the thrust wafer 1, so as to press the thrust wafer 1 on the support wafer 2 and not affect the downward movement of the thrust wafer 1.

[0047] In one embodiment, the spacer blocks 5 on both sides of the elastic piece cluster 3 are arranged in an "eight" shape, and the first hook plates 7 are fixedly connected to the outer side of the thrust support 4.

[0048] It can be understood that the spacer blocks 5 on both sides of the elastic piece cluster 3 are arranged in an "eight" shape, that is, the inner side distance of the two spacer blocks 5 is small, the outer side distance of the two spacer blocks 5 is large, that is, the inner side of the two spacer blocks 5 and the first hook plates 7 on the outer side can jointly limit the horizontal movement of the support wafer 2.

[0049] It should be noted that the two sides of the support wafer 2 respectively contact the two spacer blocks 5, that is, the two spacer blocks 5 can provide a guiding effect for the vertical movement of the support wafer 2.

[0050] In one embodiment, two first hook plates 7 are symmetrically arranged on the outer side of the support wafer 2.

[0051] In one embodiment, a first slot 202 is arranged on the outer side of the support wafer 2 in the horizontal direction, the hook part of the first hook plate 7 is hung on the first slot 202, and the slot width of the first slot 202 is greater than the thickness of the hook part of the first hook plate 7, so as to limit the upward movement of the support wafer 2 and not limit the downward movement of the support wafer 2 to a certain extent.

[0052] In one embodiment, two second hook plates 8 are symmetrically arranged on the outer side of the thrust wafer 1.

[0053] In one embodiment, a second slot 101 is arranged on the outer side of the thrust wafer 1 in the horizontal direction, the hook part of the second hook plate 8 is hung on the second slot 101, and the slot width of the second slot 101 is greater than the thickness of the hook part of the second hook plate 8, so as to limit the upward movement of the outer side of the thrust wafer 1 and not limit the downward movement of the outer side of the thrust wafer 1 to a certain extent.

[0054] In one embodiment, two third hook plates 9 are symmetrically arranged on the inner side of the thrust wafer 1.

[0055] In one embodiment, the inner side of the thrust pad 1 is provided with a third slot 102 in the horizontal direction, the hook part of the third hook plate 9 is hung on the third slot 102, and the slot width of the third slot 102 is greater than the thickness of the hook part of the third hook plate 9, so as to limit the upward movement of the inner side of the thrust pad 1 and not limit the downward movement of the inner side of the thrust pad 1 to a certain extent.

[0056] In one embodiment, the spacer block 5, the limiting plate 6 and the first hook plate 7 are all bolted on the thrust support 4, the second hook plate 8 is bolted on the thrust pad 2, and the third hook plate 9 is bolted on the spacer block 5, so as to facilitate the installation or disassembly of the support structure.

[0057] In the description of the utility model, it is understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0058] Although the utility model is described herein with reference to specific embodiments, it should be understood that these embodiments are only examples of the principles and applications of the utility model. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed, as long as they do not deviate from the spirit and scope of the utility model defined in the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from the original claims. It should also be understood that the features described in conjunction with a single embodiment can be used in other described embodiments.

Claims

1. A support structure for improving pad tile temperature, characterized by, The elastic piece cluster (3) is arranged on the upper end of the thrust support (4), and the support tile (2) is arranged on the upper end of the elastic piece cluster (3), and the upper end surface of the support tile (2) is attached to the lower end surface of the thrust tile (1); a groove (201) is formed in the upper end of the support tile (2).

2. The support structure for improving the pad temperature according to claim 1, wherein The spacer block (5) is arranged between two adjacent thrust tiles (1), and the limiting plate (6) is arranged to limit the horizontal movement of the elastic piece cluster (3) by cooperating with the spacer block (5); The first hook plate (7) is arranged to limit the upward movement of the support tile (2) and cooperate with the spacer block (5) to limit the horizontal movement of the support tile (2), and the spacer block (5), the limiting plate (6) and the first hook plate (7) are fixedly connected to the thrust support (4); The second hook plate (8) and the third hook plate (9) are arranged to limit the upward movement of the thrust tile (1), the second hook plate (8) is fixedly connected to the support tile (2), and the third hook plate (9) is fixedly connected to the spacer block (5).

3. The support structure for improving the pad temperature of a thrust pad according to claim 2, wherein The spacer block (5) on both sides of the elastic piece cluster (3) is arranged in an "eight" shape, and the first hook plate (7) is fixedly connected to the outer side of the thrust support (4).

4. The support structure of claim 3, wherein, Two first hook plates (7) are symmetrically arranged on the outer side of the support tile (2).

5. A support structure for improving the pad temperature of a thrust pad according to claim 3 or 4, wherein A first slot (202) is arranged on the outer side of the support tile (2) in the horizontal direction, the hooking part of the first hook plate (7) is hung on the first slot (202), and the slot width of the first slot (202) is greater than the thickness of the hooking part of the first hook plate (7).

6. The support structure of claim 2, wherein, Two second hook plates (8) are symmetrically arranged on the outer side of the thrust tile (1).

7. The support structure of claim 6, wherein, A second slot (101) is arranged on the outer side of the thrust tile (1) in the horizontal direction, the hooking part of the second hook plate (8) is hung on the second slot (101), and the slot width of the second slot (101) is greater than the thickness of the hooking part of the second hook plate (8).

8. The support structure of claim 2, wherein, Two third hook plates (9) are symmetrically arranged on the inner side of the thrust tile (1).

9. The support structure of claim 8, wherein, A third slot (102) is arranged on the inner side of the thrust tile (1) in the horizontal direction, the hooking part of the third hook plate (9) is hung on the third slot (102), and the slot width of the third slot (102) is greater than the thickness of the hooking part of the third hook plate (9).

10. The support structure of claim 2, wherein, The spacer block (5), the limiting plate (6) and the first hook plate (7) are bolted to the thrust support (4), the second hook plate (8) is bolted to the support tile (2), and the third hook plate (9) is bolted to the spacer block (5).

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