CN216158246U - Wave spring bearing pre-tightening structure suitable for high-temperature accessory transmission casing - Google Patents
Wave spring bearing pre-tightening structure suitable for high-temperature accessory transmission casing Download PDFInfo
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- CN216158246U CN216158246U CN202122282311.XU CN202122282311U CN216158246U CN 216158246 U CN216158246 U CN 216158246U CN 202122282311 U CN202122282311 U CN 202122282311U CN 216158246 U CN216158246 U CN 216158246U
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- gear shaft
- wave spring
- casing
- ball bearing
- bearing
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Abstract
The utility model belongs to the technical field of high-temperature environment engine accessory casing design, and discloses a wave spring bearing pre-tightening structure suitable for a high-temperature accessory transmission casing, which comprises a gear shaft and a casing shell, wherein the gear shaft is rotatably arranged in the casing shell through an upper ball bearing and a lower ball bearing; the top and the bottom of the gear shaft are respectively provided with a group of wave springs, and the wave springs are provided with compression capacity and press the gear shaft in the casing. The structure of the utility model effectively ensures the problem that the gear shaft moves up and down after the casing body is expanded by hot wires in a high-temperature environment; the original performance of the gear shaft cannot be influenced by the design position of the wave spring; the designed axial clearance can ensure that the axial displacement of the gear shaft under the high-temperature environment is controlled within a reasonable range, so that the vibration of the bearing can be effectively reduced, and the working condition of the bearing is improved.
Description
Technical Field
The utility model belongs to the technical field of high-temperature environment engine accessory casing design, relates to an accessory casing gear shaft, and particularly relates to a wave spring bearing pre-tightening structure suitable for a high-temperature accessory transmission casing.
Background
The accessory casing gear shaft adopts a simple support mode of ball bearings at two ends, as shown in figure 1, the bearing needs a certain axial displacement space in a working state, the normal value is 0.3-1.4 mm, the axial displacement can be adjusted to a specified range through an adjusting pad under a general condition, and the use requirement of working at normal temperature can be met. However, the casing of the accessory casing used in a high-temperature environment has thermal expansion deformation under the high-temperature environment of 300 ℃, and the expansion rate of the aluminum alloy material is higher than that of steel, so that the deformation of the casing and the steel is inconsistent, for example, if the distance between two bearings of a gear shaft in the accessory casing is 100mm, and the high-temperature environment from normal temperature to 300 ℃, the axial displacement increment of the bearing in the accessory casing is about 0.39mm, and the axial displacement increment of the gear shaft of the accessory casing in a high-temperature state is increased, so that the vibration of the gear and the bearing is increased, the transmission effect is affected, and the service life of the bearing is shortened.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problems, the utility model provides a wave spring bearing pre-tightening structure suitable for a high-temperature accessory transmission casing, which can reduce the influence of bearing channeling increase on the working condition of a bearing caused by hot wire expansion of a casing of an accessory transmission system in a high-temperature environment of 300 ℃.
The technical scheme of the utility model is as follows:
a wave spring bearing pre-tightening structure suitable for a high-temperature accessory transmission casing comprises a gear shaft and a casing shell, wherein the gear shaft is rotatably arranged in the casing shell through an upper ball bearing and a lower ball bearing; the top and the bottom of the gear shaft are respectively provided with a group of wave springs, and the wave springs are provided with compression capacity and press the gear shaft in the casing.
Furthermore, two axial limiting structures are arranged on the gear shaft, and the upper ball bearing and the lower ball bearing are axially limited inwards by the two axial limiting structures. The limiting structure is used for limiting the position of the ball bearing on one hand, and the other side is used for connecting the ball bearing with the axial movement of the gear shaft.
Furthermore, the wave spring is arranged between the ball bearing and the casing shell, applies axial force to the ball bearing, and axially fixes the gear shaft through the cooperation of the ball bearing and the axial limiting structure. The force of the wave spring is applied to the ball bearing, so that the ball bearing can be fixed without influencing the rotation of the gear shaft.
Furthermore, the adjusting pad is arranged between the wave spring and the ball bearing on any side.
Furthermore, the stroke of the pad is adjusted to enable the upper and lower groups of wave springs to be compressed, and the axial gap of the gear shaft is 0.3-0.9 mm. Thus, after entering a high temperature state, the axial play of the gear shaft is increased, but can be controlled within a range not exceeding 1.3 mm.
Furthermore, the stroke of the pad is adjusted to compress the upper and lower groups of wave springs, and the axial clearance of the gear shaft is 0.3 mm.
The utility model has the following beneficial effects:
1. the structure of the utility model effectively ensures the problem that the gear shaft moves up and down after the casing body is expanded by hot wires in a high-temperature environment;
2. the design position of the wave spring does not influence the original performance of the gear shaft;
3. the axial clearance designed by the utility model can ensure that the axial displacement of the gear shaft in a high-temperature environment is controlled within a reasonable range, so that the vibration of the bearing can be effectively reduced, and the working condition of the bearing is improved.
Drawings
FIG. 1 is a schematic view of a gear shaft of an accessory case in the prior art;
FIG. 2 is a schematic structural diagram of a wave spring according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating structural parameters of a wave spring according to an embodiment of the present invention;
FIG. 4 is a schematic view of the gear shaft structure of the accessory case according to the embodiment of the present invention;
in the figure: 1-gear shaft, 2-casing shell, 3-ball bearing, 4-wave spring, 5-adjusting pad, 6-bearing bush.
Detailed Description
This section is an example of the present invention and is provided to explain and illustrate the technical solutions of the present invention.
A wave spring bearing pre-tightening structure suitable for a high-temperature accessory transmission casing comprises a gear shaft 1 and a casing shell 2, wherein the gear shaft 1 is rotatably arranged in the casing shell 2 through an upper ball bearing 3 and a lower ball bearing 3; wherein, there are two sets of wave spring 4, and the top and the bottom of gear shaft 1 respectively are equipped with a set of wave spring 4, and wave spring 4 is equipped with the compression volume, presses gear shaft 1 in quick-witted casket casing 2.
Two axial limiting structures are arranged on the gear shaft 1, and the two axial limiting structures limit the upper ball bearing 3 and the lower ball bearing 3 axially inwards. The limiting structure is used for limiting the position of the ball bearing on one hand, and the other side is used for connecting the ball bearing with the axial movement of the gear shaft.
The wave spring 4 is arranged between the ball bearing 3 and the casing shell 2, applies axial force to the ball bearing, and axially fixes the gear shaft 1 by matching the ball bearing 3 with the axial limiting structure. The force of the wave spring 4 is applied to the ball bearing, so that the ball bearing can be fixed without influencing the rotation of the gear shaft 1.
The adjusting pad 5 is provided between the wave spring 4 and the ball bearing 3 on either side.
The stroke of the adjusting pad 5 enables the upper and lower groups of wave springs 4 to be compressed, and the axial clearance of the gear shaft 1 is 0.3-0.9 mm. Thus, after entering the high temperature state, the axial play of the gear shaft 1 is increased, but can be controlled within a range not exceeding 1.3 mm.
The stroke of the adjusting pad 5 enables the upper and lower groups of wave springs 4 to be compressed, and the axial clearance of the gear shaft 1 is 0.3 mm.
The principle of the utility model is as follows:
the gear shaft mounting structure of the present invention comprises: gear shaft 1, ball bearing 3 (2), adjusting pad 5, wave spring 4 (2), gear shaft 1 adopts the simple supporting structure of ball bearing, considers the inner structure and the relevant size of needs pretension bearing during the assembly, calculates the size of pretightning force. According to the magnitude of the pretightening force, the geometric parameters of the wave spring 4 are designed to comprise: the wave radius, angle, total wave number, wave spring width, etc. to realize the elastic force P under the compression fixed stroke t. In the pre-tensioned configuration, the adjustment pad 5 is selected to ensure that the wave spring 4 has a particular desired axial travel (until the spring is fully compressed). When the adjusting device is used, the bearing outer rings at the two ends of the gear shaft 1 are in contact with the wave spring 4, axial pre-tightening force is applied to the ball bearing 3, the axial gap of the bearing shaft 3 is adjusted by matching the adjusting pad 5, and the axial gap is adjusted to be within the range of 0.3-0.9 mm. After entering a high-temperature state, the axial displacement is increased, but still can be controlled within the range of not more than 1.3mm, and meanwhile, the wave spring 4 is still tightly attached to the end face of the bearing, so that the pre-tightening force of the bearing is provided, the damping of the 3 displacement of the ball bearing is increased, the vibration of the bearing can be effectively reduced, and the working condition of the bearing is improved.
Claims (6)
1. A wave spring bearing pre-tightening structure suitable for a high-temperature accessory transmission casing is characterized by comprising a gear shaft (1) and a casing shell (2), wherein the gear shaft (1) is rotatably arranged in the casing shell (2) through an upper ball bearing and a lower ball bearing (3); wherein, there are two sets of wave spring (4), and the top and the bottom of gear shaft (1) respectively are equipped with a set of wave spring (4), and wave spring (4) are equipped with the compression volume, press gear shaft (1) in quick-witted casket casing (2).
2. The wave spring bearing pre-tightening structure suitable for the high-temperature accessory transmission casing is characterized in that the gear shaft (1) is provided with two axial limiting structures which axially limit the upper ball bearing (3) and the lower ball bearing (3) inwards.
3. The wave spring bearing pre-tightening structure suitable for the high-temperature accessory drive case as claimed in claim 2, wherein the wave spring (4) is arranged between the ball bearing (3) and the case housing (2), applies an axial force to the ball bearing, and axially fixes the gear shaft (1) through the ball bearing (3) in cooperation with the axial limiting structure.
4. The wave spring bearing preload structure for high temperature accessory drive case as claimed in claim 1, wherein the adjusting pad (5) is provided between the wave spring (4) and the ball bearing (3) on either side.
5. The wave spring bearing pre-tightening structure suitable for the high-temperature accessory transmission casing as claimed in claim 4, wherein the stroke of the adjusting pad (5) enables the upper and lower sets of wave springs (4) to compress, and the axial clearance of the gear shaft (1) is 0.3-0.9 mm.
6. The wave spring bearing pre-tightening structure suitable for the high-temperature accessory transmission case as claimed in claim 4, wherein the stroke of the adjusting pad (5) enables the upper and lower sets of wave springs (4) to compress, and the axial clearance of the gear shaft (1) is 0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122282311.XU CN216158246U (en) | 2021-09-18 | 2021-09-18 | Wave spring bearing pre-tightening structure suitable for high-temperature accessory transmission casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122282311.XU CN216158246U (en) | 2021-09-18 | 2021-09-18 | Wave spring bearing pre-tightening structure suitable for high-temperature accessory transmission casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216158246U true CN216158246U (en) | 2022-04-01 |
Family
ID=80852912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122282311.XU Active CN216158246U (en) | 2021-09-18 | 2021-09-18 | Wave spring bearing pre-tightening structure suitable for high-temperature accessory transmission casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216158246U (en) |
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2021
- 2021-09-18 CN CN202122282311.XU patent/CN216158246U/en active Active
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