Easily-maintained high-speed long-span shaft group with torque protection function

Abstract

The invention discloses an easy-to-maintain high-speed long-span shaft group with torque protection, relates to a long-span shaft group with torque protection, and aims to solve the problems that an existing over-torque protection structure is usually arranged on a coupler, and iron blocks can fly to damage other equipment due to shear pin type and other destructive over-torque protection modes. An input shaft is rotationally connected and installed on an upper shell and a lower shell through bearings, an output shaft is rotationally connected and installed on the upper shell and the lower shell through bearings, the output end of the input shaft is arranged close to the input end of the output shaft, and a protection shaft is inserted into the input shaft and the output shaft. The inner side wall, close to the input end cover, of one labyrinth sealing ring is arranged on the input shaft in a sleeving mode and seals the input shaft and the input end cover, and the inner side wall, close to the output end cover, of the other labyrinth sealing ring is arranged on the output shaft in a sleeving mode and seals the output shaft and the output end cover. The invention belongs to the field of mechanical power transmission.

Description

Technical Field

[0001] The invention relates to a long-span shaft group with torque protection, and in particular to an easy-to-maintain, high-speed, long-span shaft group with torque protection. The invention belongs to the field of mechanical power transmission. Background Art

[0002] With the development of technology, the rotation speed of the mechanical system shaft system is constantly increasing, and the span length of the shaft system is required to be longer. At the same time, the safety issues of the shaft system are becoming more and more important, and the stability and vibration characteristics design of the shaft system are also receiving attention.

[0003] The length of the shaft system is usually adjusted by the length of the coupling. An overly long coupling will affect the stability of the shaft system, so other methods are needed to lengthen the length of the entire shaft system. The safety problem of the shaft system is generally solved by an over-torque protection structure. The existing over-torque protection structure is usually set on the coupling. Among them, destructive over-torque protection methods such as shear pin type may produce iron block missiles to damage other equipment. The cost of the safety coupling is too high, which is not conducive to cost control. The stability and vibration characteristics of the shaft system are related to the torsional stiffness of the shaft system. In order to improve the torsional stiffness of the shaft system, it is usually necessary to start with the coupling design, but this method may affect the torque transmission capacity of the coupling itself, and the design cost is relatively high. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing over-torque protection structure is usually set on the coupling, among which destructive over-torque protection methods such as shear pin type may produce iron block missiles to damage other equipment, which is not conducive to cost control, and thus provide an easy-to-maintain, high-speed, long-span shaft group with torque protection.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] An easy-to-maintain, high-speed, long-span shaft group with torque protection, comprising an input shaft, an input flange, an input end cover, an upper housing, an output flange, an output end cover, an output shaft, a protection shaft, a lower housing, two labyrinth sealing rings and a plurality of bearings;

[0007] The upper housing is snap-fitted and mounted on the lower housing, the input shaft is rotatably connected and mounted on the upper housing and the lower housing through a bearing, the output shaft is rotatably connected and mounted on the upper housing and the lower housing through a bearing, the output end of the input shaft is arranged close to the input end of the output shaft, the protection shaft is inserted into the input shaft and the output shaft, the protection shaft is connected to the input shaft through a spline, the protection shaft is connected to the output shaft through a spline, and the axis of the input shaft, the axis of the output shaft and the axis of the protection shaft are arranged to coincide with each other,

[0008] The input end cover is fixedly mounted on one end of the upper shell and the lower shell, the output end cover is fixedly mounted on one end of the upper shell and the lower shell, the input flange is connected to the input end of the input shaft through a spline, the output flange is connected to the output end of the output shaft through a spline, a labyrinth sealing ring is sleeved on the input shaft close to the inner side wall of the input end cover and seals the input shaft and the input end cover, and another labyrinth sealing ring is sleeved on the output shaft close to the inner side wall of the output end cover and seals the output shaft and the output end cover.

[0009] Furthermore, the number of bearings is four, the input shaft is rotatably connected and mounted on the upper shell and the lower shell via two bearings, and the output shaft is rotatably connected and mounted on the upper shell and the lower shell via two bearings.

[0010] Further, it also includes two washers of the middle retaining ring, two outer retaining rings, two inner retaining rings and two compression springs;

[0011] An inner retaining ring and an outer retaining ring are arranged between the two bearings on the input shaft, and the inner retaining ring is pressed against the inner ring of the bearing, and the outer retaining ring is pressed against the outer ring of the bearing. A washer and a compression spring are arranged on the outer ring of the bearing close to the input end of the input shaft, and the compression spring is embedded in the outer retaining ring, and the compression spring is pressed against the washer. An inner retaining ring and an outer retaining ring are arranged between the two bearings on the output shaft, and the inner retaining ring is pressed against the inner ring of the bearing, and the outer retaining ring is pressed against the outer ring of the bearing. A washer and a compression spring are arranged on the outer ring of the bearing close to the output end of the output shaft, and the compression spring is embedded in the outer retaining ring, and the compression spring is pressed against the washer. The two ends of the middle retaining ring are pressed against the outer ring of the bearing at the output end of the input shaft and the outer ring of the bearing at the input end of the output shaft respectively.

[0012] Furthermore, the outer circumferential surface of the outer retaining ring, the outer circumferential surface of the middle retaining ring and the outer circumferential surface of the gasket are matched with the inner side wall of the upper shell body and the inner side wall of the lower shell body.

[0013] Further, it also includes an oil supply flange and an oil return screw plug;

[0014] The oil supply flange is fixedly mounted on the top of the upper housing by flange fixing bolts, and the lower housing is mounted on the bottom of the oil return screw plug. The oil supply flange provides lubricating oil to the bearing, and the oil return screw plug is used to discharge the lubricating oil from the bearing.

[0015] Furthermore, it also includes two sealing rings, two O-rings and four retaining springs.

[0016] A sealing ring is arranged in the input shaft, and a sealing ring is arranged in the output shaft. Each sealing ring is provided with an O-ring, and sealing is performed by the sealing ring and the O-ring. A retaining spring is arranged on both sides of each sealing ring, and the sealing ring is clamped and positioned by the retaining spring.

[0017] Furthermore, it also includes a wire retaining ring, which is installed on the protection shaft and performs axial positioning on the protection shaft.

[0018] Furthermore, it also includes a plurality of bolt assemblies and a plurality of positioning pins; the connecting plate of the upper shell and the connecting plate of the lower shell are fixedly connected by the plurality of bolt assemblies, and the plurality of positioning pins are inserted into the connecting plate of the upper shell and the connecting plate of the lower shell.

[0019] Furthermore, it also includes two locking nuts; one locking nut is threadedly installed on the input end of the input shaft in the input flange, and the other locking nut is threadedly installed on the output end of the output shaft in the output flange.

[0020] Furthermore, the inner ring of the bearing is respectively arranged with interference fit on the input shaft and the output shaft.

[0021] Beneficial effects of the present invention:

[0022] 1. The present application provides a safe and easy-to-maintain super-torque protection method. When the protection is triggered, the damage occurs inside the shaft group and will not cause damage to other structures. Different torque protection capabilities can be achieved by replacing only one protection shaft. The present application provides a reliable and simple structural solution. The present invention has a simple principle, reliable structure, and low maintenance cost. It meets the current design requirements for high-speed long shaft systems and makes up for the shortcomings of the current high-speed long shaft system design. The shaft group described in the present application provides a structure for lengthening the span of the shaft system through the series connection of three transmission shafts. Torque protection of different torque values ​​is achieved through the structure of the protection section of the protection shaft.

[0023] 2. When the shaft system of the shaft assembly of the present application exceeds a given torque value, the protective section of the protective shaft will break to protect the entire mechanical system. After the protective section breaks, it is only necessary to remove the retaining ring and sealing block installed in the input and output shafts, and the damaged protective shaft can be pushed out from one side. After replacing the new protective shaft, the bearing seat can restore its full function.

[0024] 3. This application can adjust the torsional stiffness of the shaft system by replacing the protective shaft. A speed measuring tooth is provided on the output shaft, and the current speed of the bearing seat can be measured in real time through a speed sensor.

[0025] 4. The structure of the present application has the advantages of simple and safe torsional stiffness transmission, and the torque protection limit value of the bearing seat can be adjusted by designing protective shafts with different structures. After the protection condition occurs, the bearing seat can quickly restore its function by replacing the protective shaft.

[0026] Figure 1 This is the main view of this application.

[0027] Figure 2 for Figure 1 Left view of . DETAILED DESCRIPTION

[0028] Specific implementation method 1: Combination Figure 1 and Figure 2The present embodiment is described as an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, which comprises an input shaft 1, an input flange 4, an input end cover 5, an upper shell 7, an output flange 17, an output end cover 19, an output shaft 20, a protection shaft 22, a lower shell 23, two labyrinth seal rings 2 and a plurality of bearings 24;

[0029] The upper housing 7 is mounted on the lower housing 23 in a snap-fitting manner. The input shaft 1 is rotatably connected and mounted on the upper housing 7 and the lower housing 23 via a bearing 24. The output shaft 20 is rotatably connected and mounted on the upper housing 7 and the lower housing 23 via a bearing 24. The output end of the input shaft 1 is arranged close to the input end of the output shaft 20. The protection shaft 22 is inserted into the input shaft 1 and the output shaft 20. The protection shaft 22 is connected to the input shaft 1 via a spline. The protection shaft 22 is connected to the output shaft 20 via a spline. The axis of the input shaft 1, the axis of the output shaft 20, and the axis of the protection shaft 22 are arranged to coincide with each other.

[0030] The input end cover 5 is fixedly mounted on one end of the upper shell 7 and the lower shell 23, the output end cover 19 is fixedly mounted on one end of the upper shell 7 and the lower shell 23, the input flange 4 is connected to the input end of the input shaft 1 through a spline, the output flange 17 is connected to the output end of the output shaft 20 through a spline, a labyrinth seal ring 2 is sleeved on the input shaft 1 close to the inner side wall of the input end cover 5 and seals the input shaft 1 and the input end cover 5, another labyrinth seal ring 2 is sleeved on the output shaft 20 close to the inner side wall of the output end cover 19 and seals the output shaft 20 and the output end cover 19. The input flange 4 and the output flange 17 are used as external interfaces for connecting to an external shaft system.

[0031] Specific implementation method 2: Combination Figure 1 and Figure 2 This embodiment is described. In this embodiment, an easy-to-maintain, high-speed, long-span shaft group with torque protection is provided. The number of bearings 24 is four. The input shaft 1 is rotatably connected and installed on the upper housing 7 and the lower housing 23 through two bearings 24. The output shaft 20 is rotatably connected and installed on the upper housing 7 and the lower housing 23 through two bearings 24. Other methods are the same as those in the first embodiment.

[0032] Specific implementation method three: Combination Figure 1 and Figure 2 The present embodiment is described as an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, which also includes a middle retaining ring 10, two washers 6, two outer retaining rings 8, two inner retaining rings 9 and two compression springs 13;

[0033] An inner retaining ring 9 and an outer retaining ring 8 are provided between the two bearings 24 on the input shaft 1, and the inner retaining ring 9 is pressed against the inner ring of the bearing 24, and the outer retaining ring 8 is pressed against the outer ring of the bearing 24. A washer 6 and a compression spring 13 are provided on the outer ring of the bearing 24 near the input end of the input shaft 1, and the compression spring 13 is embedded in the outer retaining ring 8, and the compression spring 13 is pressed against the washer 6. An inner retaining ring 9 and an outer retaining ring 8 are provided between the two bearings 24 on the output shaft 20, and the inner retaining ring 9 is pressed against the inner ring of the bearing 24, and the outer retaining ring 8 is pressed against the outer ring of the bearing 24. A washer 6 and a compression spring 13 are provided on the outer ring of the bearing 24 near the output end of the output shaft 20, and the compression spring 13 is embedded in the outer retaining ring 8, and the compression spring 13 is pressed against the washer 6. The two ends of the middle retaining ring 10 are respectively pressed against the outer ring of the bearing 24 at the output end of the input shaft 1 and the outer ring of the bearing 24 at the input end of the output shaft 20. Other methods are the same as those in the second specific implementation method.

[0034] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment describes an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, wherein the outer circumference of the outer retaining ring 8, the outer circumference of the middle retaining ring 10 and the outer circumference of the washer 6 are matched with the inner side wall of the upper shell 7 and the inner side wall of the lower shell 23. Other methods are the same as those of the third embodiment.

[0035] Specific implementation method five: Combination Figure 1 and Figure 2 The present embodiment is described as an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, which also includes an oil supply flange 11 and an oil return screw plug 21;

[0036] The oil supply flange 11 is fixedly mounted on the top of the upper housing 7 by flange fixing bolts, and the lower housing 23 is mounted on the bottom of the oil return screw plug 21. The oil supply flange 11 provides lubricating oil to the bearing 24, and the oil return screw plug 21 is used to discharge the lubricating oil of the bearing 24. Other methods are the same as those of the third specific embodiment.

[0037] Specific implementation method six: Combination Figure 1 and Figure 2 The present embodiment is described as an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, which also includes two sealing rings 3, two O-rings 15 and four retaining springs 16.

[0038] A sealing ring 3 is provided in the input shaft 1, and a sealing ring 3 is provided in the output shaft 20. Each sealing ring 3 is provided with an O-ring 15, and sealing is performed by the sealing ring 3 and the O-ring 15. A retaining spring 16 is provided on both sides of each sealing ring 3, and the sealing ring 3 is clamped and positioned by the retaining spring 16. Other methods are the same as those in the first specific implementation mode.

[0039] Specific implementation method seven: Combination Figure 1 and Figure 2 This embodiment is described as an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, which also includes a wire retaining ring 14, which is installed on the protection shaft 22 and axially positions the protection shaft 22. Other methods are the same as those of the sixth embodiment.

[0040] Specific implementation method eight: Combination Figure 1 and Figure 2 This embodiment is described. This embodiment is an easy-to-maintain, high-speed, long-span shaft group with torque protection, which also includes multiple bolt assemblies 25 and multiple positioning pins 26; the connecting plate of the upper shell 7 and the connecting plate of the lower shell 23 are fixedly connected by multiple bolt assemblies 25, and multiple positioning pins 26 are inserted into the connecting plate of the upper shell 7 and the connecting plate of the lower shell 23. The positioning pins 26 are used to accurately position the connecting plate of the upper shell 7 and the connecting plate of the lower shell 23. Other methods are the same as those of the specific embodiment seven.

[0041] Specific implementation method nine: Combination Figure 1 and Figure 2 This embodiment is described. This embodiment is an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, which also includes two locking nuts 27; one locking nut 27 is threadedly installed on the input end of the input shaft 1 in the input flange 4, and the other locking nut 27 is threadedly installed on the output end of the output shaft 20 in the output flange 17. The locking nut 27 performs axial positioning on the input shaft 1 and the output shaft 20. Other methods are the same as those of the second embodiment.

[0042] Specific implementation method ten: Combination Figure 1 and Figure 2 This embodiment describes an easy-to-maintain, high-speed, long-span shaft group with torque protection, in which the inner ring of the bearing 24 is interference-fitted with the input shaft 1 and the output shaft 20, respectively, as a support point during the operation of the shaft. Other methods are the same as those of the first embodiment.

[0043] Specific implementation method eleven: Combination Figure 1 and Figure 2 To illustrate the present embodiment, the present embodiment describes an easy-to-maintain, high-speed, long-span shaft group with torque protection, which also includes two wind shields 18, one wind shield 18 is fixedly installed on the outside of the input end cover 5 and the other wind shield 18 is fixedly installed on the outside of the output end cover 19, and the other methods are the same as the specific implementation method one.

[0044] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the present invention. The protection scope of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. Each implementation scheme within its scope shall be subject to the constraints of the present invention.

Claims

1. An easy-to-maintain, high-speed, long-span shaft assembly with torque protection, characterized in that: It comprises an input shaft (1), an input flange (4), an input end cover (5), an upper housing (7), an output flange (17), an output end cover (19), an output shaft (20), a protective shaft (22), a lower housing (23), two labyrinth sealing rings (2) and a plurality of bearings (24); The upper housing (7) is mounted on the lower housing (23) by snapping, the input shaft (1) is mounted on the upper housing (7) and the lower housing (23) by rotational connection via a bearing (24), the output shaft (20) is mounted on the upper housing (7) and the lower housing (23) by rotational connection via a bearing (24), the output end of the input shaft (1) is arranged close to the input end of the output shaft (20), the protection shaft (22) is inserted into the input shaft (1) and the output shaft (20), the protection shaft (22) is connected to the input shaft (1) by a spline, the protection shaft (22) is connected to the output shaft (20) by a spline, and the axis of the input shaft (1), the axis of the output shaft (20) and the axis of the protection shaft (22) are arranged to coincide with each other, The input end cover (5) is fixedly mounted on one end of the upper shell (7) and the lower shell (23), the output end cover (19) is fixedly mounted on one end of the upper shell (7) and the lower shell (23), the input flange (4) is connected to the input end of the input shaft (1) through a spline, the output flange (17) is connected to the output end of the output shaft (20) through a spline, a labyrinth seal ring (2) is sleeved on the input shaft (1) close to the inner side wall of the input end cover (5) and seals the input shaft (1) and the input end cover (5), and another labyrinth seal ring (2) is sleeved on the output shaft (20) close to the inner side wall of the output end cover (19) and seals the output shaft (20) and the output end cover (19).

2. According to claim 1, an easy-to-maintain, high-speed, long-span shaft assembly with torque protection, characterized in that: The number of bearings (24) is four. The input shaft (1) is rotatably connected and mounted on the upper housing (7) and the lower housing (23) via two bearings (24). The output shaft (20) is rotatably connected and mounted on the upper housing (7) and the lower housing (23) via two bearings (24).

3. According to claim 2, an easy-to-maintain, high-speed, long-span shaft assembly with torque protection is characterized by: It also includes a middle retaining ring (10), two washers (6), two outer retaining rings (8), two inner retaining rings (9) and two compression springs (13); An inner retaining ring (9) and an outer retaining ring (8) are provided between two bearings (24) on the input shaft (1), and the inner retaining ring (9) is pressed against the inner ring of the bearing (24), and the outer retaining ring (8) is pressed against the outer ring of the bearing (24). A washer (6) and a compression spring (13) are provided on the outer ring of the bearing (24) near the input end of the input shaft (1), and the compression spring (13) is embedded in the outer retaining ring (8). The compression spring (13) is pressed against the washer (6). An inner retaining ring (9) and an outer retaining ring (8) are provided between two bearings (24) on the output shaft (20). A retaining ring (8) is provided, and the inner retaining ring (9) is pressed against the inner ring of the bearing (24), the outer retaining ring (8) is pressed against the outer ring of the bearing (24), a washer (6) and a compression spring (13) are provided near the outer ring of the bearing (24) at the output end of the output shaft (20), the compression spring (13) is embedded in the outer retaining ring (8), the compression spring (13) is pressed against the washer (6), and the two ends of the middle retaining ring (10) are pressed against the outer ring of the bearing (24) at the output end of the input shaft (1) and the outer ring of the bearing (24) at the input end of the output shaft (20), respectively.

4. According to claim 3, an easy-to-maintain, high-speed, long-span shaft assembly with torque protection is characterized by: The outer circumferential surface of the outer retaining ring (8), the outer circumferential surface of the middle retaining ring (10) and the outer circumferential surface of the gasket (6) are arranged in coordination with the inner side wall of the upper shell (7) and the inner side wall of the lower shell (23).

5. According to claim 1, the easy-to-maintain, high-speed, long-span shaft assembly with torque protection is characterized by: It also includes an oil supply flange (11) and an oil return screw plug (21); The oil supply flange (11) is fixedly mounted on the top end of the upper housing (7) by means of flange fixing bolts, and the lower housing (23) is mounted on the bottom end of the oil return screw plug (21).

6. According to claim 1, the easy-to-maintain, high-speed, long-span shaft assembly with torque protection is characterized by: It also includes two sealing rings (3), two O-rings (15) and four retaining rings (16). A sealing ring (3) is arranged in the input shaft (1), and a sealing ring (3) is arranged in the output shaft (20). An O-ring (15) is arranged on each sealing ring (3), and sealing is performed by the sealing ring (3) and the O-ring (15). A retaining spring (16) is arranged on both sides of each sealing ring (3), and the sealing ring (3) is clamped and positioned by the retaining spring (16).

7. The easy-to-maintain, high-speed, long-span, torque-protected shaft assembly according to claim 1, characterized in that: It also includes a wire retaining ring (14), which is installed on the protection shaft (22) and axially positions the protection shaft (22).

8. The easy-to-maintain, high-speed, long-span, torque-protected shaft assembly according to claim 1, characterized in that: It also includes a plurality of bolt assemblies (25) and a plurality of positioning pins (26); the connecting plate of the upper shell (7) and the connecting plate of the lower shell (23) are fixedly connected via the plurality of bolt assemblies (25), and the plurality of positioning pins (26) are inserted into the connecting plate of the upper shell (7) and the connecting plate of the lower shell (23).

9. The easy-to-maintain, high-speed, long-span, torque-protected shaft assembly according to claim 1, characterized in that: It also includes two locking nuts (27); one locking nut (27) is threadedly mounted on the input end of the input shaft (1) in the input flange (4), and the other locking nut (27) is threadedly mounted on the output end of the output shaft (20) in the output flange (17).

10. The easy-to-maintain, high-speed, long-span, torque-protected shaft assembly according to claim 1, characterized in that: The inner ring of the bearing (24) is respectively arranged with interference fit on the input shaft (1) and the output shaft (20).

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