A thrust loading device for a thrust bearing test bench

Abstract

The present invention relates to the field of loading devices, and discloses a thrust loading device for a thrust bearing test bench, comprising a motor base, a shaft base, an air compressor, a filter, a ball valve, an electrical proportional valve and a pressure transmitter, wherein a variable frequency motor is arranged at the upper end of the motor base, a high elastic coupling is arranged at one side of the variable frequency motor, a thrust bearing is arranged at the upper end of the shaft base, a support bearing is arranged at the upper end of the shaft base, a thrust shaft is arranged inside the thrust bearing, a counterweight is arranged outside the thrust shaft, and a thrust loading device is arranged at one end of the thrust shaft. The thrust loading device for the thrust bearing test bench is advantageous for axial loading of the thrust bearing and improving loading efficiency by being provided with an airbag and a force sensor, is advantageous for measuring the thrust of the airbag by being provided with an electrical proportional valve, is advantageous for reducing vibration of the unsteady propeller thrust by being provided with a displacement sensor, and has a good vibration reduction effect.

Description

Technical Field

[0001] The invention relates to the technical field of loading devices, in particular to a thrust loading device for a thrust bearing test bench. Background Art

[0002] The research on longitudinal vibration reduction technology of ship propulsion shaft system has been going on for many years at home and abroad. The unsteady propeller thrust is the direct cause of the longitudinal vibration of the shaft system.

[0003] However, the existing thrust loading device of the thrust bearing test bench still has certain disadvantages when in use. First, the axial loading of the thrust bearing is relatively cumbersome, and there is no airbag and force sensor. Secondly, during the use of the device, it is inconvenient to measure the thrust of the airbag, which is not conducive to data display. Finally, there is no better vibration reduction device for the unsteady propeller thrust, which reduces the work efficiency. For this reason, we propose a thrust loading device for the thrust bearing test bench. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a thrust loading device for a thrust bearing test bench. By providing an airbag and a force sensor, it is beneficial to axial loading of the thrust bearing and improving loading efficiency. By providing an electrical proportional valve, it is beneficial to measuring the thrust of the airbag. By providing a displacement sensor, it is beneficial to reduce the vibration of unsteady propeller thrust, thereby achieving a better vibration reduction effect.

[0006] (II) Technical solution

[0007] In order to realize the above-mentioned features, an airbag and a force sensor are provided to facilitate axial loading of the thrust bearing, an electrical proportional valve is provided to facilitate measuring the thrust of the airbag, and a displacement sensor is provided to facilitate vibration reduction of the unsteady propeller thrust, the present invention provides the following technical solutions: a thrust loading device for a thrust bearing test bench, comprising a motor base, a shaft system base, an air compressor, a filter, a ball valve, an electrical proportional valve and a pressure transmitter, a variable frequency motor is provided at the upper end of the motor base, a high elastic coupling is provided on one side of the variable frequency motor, a thrust bearing is provided at the upper end of the shaft system base, and the A support bearing is arranged at the upper end of the shaft system base, a thrust shaft is arranged inside the thrust bearing, a counterweight is arranged on the outer side of the thrust shaft, a thrust loading device is arranged at one end of the thrust shaft, a force sensor is arranged at the upper end of the thrust loading device, an airbag cylinder is arranged on one side of the thrust loading device, the thrust loading device includes an anti-rotation key, a skeleton oil seal, a thrust plate, a thrust spherical roller bearing, a cylindrical roller bearing, an O-ring, a limiting screw sleeve, an airbag support, an end cover, an airbag, an airbag flange and an anti-rotation seat, and the thrust bearing includes an annular oil chamber, a piston, a displacement sensor support, and a displacement sensor.

[0008] Preferably, the motor base and the variable frequency motor are fixedly connected, the variable frequency motor and the high elastic coupling are movably connected, the upper end of the shaft system base is fixedly connected with a thrust bearing, the shaft system base and the support bearing are fixedly connected, and the support bearings are in two groups and arranged in parallel, and the outer side of the thrust shaft is fixedly connected with a counterweight block, and the counterweight block is made of metal material.

[0009] Preferably, a thrust loading device is fixedly connected to the upper end of the shaft system base, a force sensor is fixedly and movably connected to one side of the thrust loading device, and the force sensors are in two groups and are symmetrically arranged, an airbag-type cylinder is movably connected to one side of the thrust loading device, and the length of the shaft system base is greater than the length of the motor base.

[0010] Preferably, the thrust shaft is a cylindrical structure, and the length of the thrust shaft is smaller than the length of the shafting base, the upper end of the shafting base is fixedly connected with an anti-rotation seat, the upper end of the anti-rotation seat is fixedly connected with an anti-rotation key, the outer side of the thrust shaft is fixedly connected with a skeleton oil seal, one side of the skeleton oil seal is fixedly connected with a thrust plate, the cross-sectional area of ​​the thrust plate is larger than the cross-sectional area of ​​the skeleton oil seal, one side of the thrust shaft is fixedly connected with a thrust spherical roller bearing, and the thrust spherical roller bearing is a cylindrical structure.

[0011] Preferably, one side of the thrust spherical roller bearing is movably connected to a cylindrical roller bearing, the outer side of the cylindrical roller bearing is fixedly connected to an O-ring, and the O-ring is an O-shaped structure, one side of the thrust shaft is fixedly connected to an end cover, the outer side of the end cover is connected to a limiting screw sleeve, and the cross-sectional area of ​​the limiting screw sleeve is larger than the cross-sectional area of ​​the end cover, the outer side of the limiting screw sleeve is fixedly connected to an airbag support, and the airbag support is fixedly connected to the shaft system base.

[0012] Preferably, an airbag is fixedly connected to one side of the end cover, and the airbag is a plastic structure; an airbag flange is fixedly connected to one side of the airbag, and the airbag flange is made of metal material.

[0013] Preferably, an annular oil chamber is embedded in the thrust bearing, and the annular oil chamber is an annular structure. A piston is movably connected to the interior of the annular oil chamber, and the piston is a movable structure.

[0014] Preferably, a displacement sensor support is fixedly connected to the interior of the thrust bearing, and the displacement sensor support is an annular structure, one end of the displacement sensor support is fixedly connected to a displacement sensor, and the displacement sensors are in two groups and are symmetrically arranged.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention provides a thrust loading device for a thrust bearing test bench, which has the following beneficial effects:

[0017] The thrust loading device of the thrust bearing test bench is provided with a thrust bearing and a thrust loading device. During the operation of the device, the thrust plate is mounted on the thrust shaft through the thrust spherical roller bearing and the cylindrical roller bearing. The inner cavity of the thrust plate is externally connected to the lubricating oil circulation cooling, and the two ends of the oil cavity are sealed by the skeleton seal and the O-ring. The anti-rotation key is used to limit the rotational movement of the thrust plate, that is, the thrust plate only makes axial displacement, the limit screw sleeve is used for axial pre-positioning of the thrust shaft, and 4 force sensors are evenly distributed on the thrust plate. The axial thrust generated by the airbag being filled with pressurized gas is transmitted to the thrust plate through the airbag flange and the force sensor. When the thrust reaches the set value, the airbag air source inlet and outlet are closed to release the compressed gas. Sealed in the airbag, the axial loading of the thrust bearing is completed. The electric proportional valve sets the airbag pressure. The air system is connected to a pressure transmitter to measure the airbag pressure. The user sets the airbag pressure on the existing centralized control desk. The thrust generated by the airbag loads the thrust bearing axially. The airbag thrust is transmitted to the centralized control desk by the force sensor. The displacement of the thrust block of the thrust bearing is measured by pre-filling the annular oil cavity with hydraulic oil of a certain pressure. The thrust generated by the piston under the action of the oil pressure is balanced with the propeller thrust, and the piston is suspended on the hydraulic oil. The hydraulic oil is used to reduce the vibration of the unsteady propeller thrust. The displacement sensor measures the axial position of the thrust block and transmits it to the centralized control desk for display and record. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a partial side sectional view of the structural thrust loading device of the present invention;

[0020] Figure 3 The pneumatic principle diagram of the structure of the present invention;

[0021] Figure 4 It is a partial side sectional view of the structural thrust bearing of the present invention.

[0022] In the figure: 1. motor base; 2. frequency conversion motor; 3. high elastic coupling; 4. thrust bearing; 5. support bearing; 6. counterweight; 7. thrust loading device; 8. force sensor; 9. airbag cylinder; 10. shaft base; 11. thrust shaft; 12. anti-rotation key; 13. skeleton oil seal; 14. thrust plate; 15. thrust spherical roller bearing; 16. cylindrical roller bearing; 17. O-ring; 18. limit screw sleeve; 19. airbag support; 20. end cover; 21. airbag; 22. airbag flange; 23. anti-rotation seat; 24. air compressor; 25. filter; 26. ball valve; 27. electric proportional valve; 28. pressure transmitter; 29. ​​annular oil chamber; 30. piston; 31. displacement sensor support; 32. displacement sensor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-4A thrust loading device for a thrust bearing test bench includes a motor base 1, a shaft base 10, an air compressor 24, a filter 25, a ball valve 26, an electric proportional valve 27 and a pressure transmitter 28. A variable frequency motor 2 is arranged at the upper end of the motor base 1, a high elastic coupling 3 is arranged at one side of the variable frequency motor 2, a thrust bearing 4 is arranged at the upper end of the shaft base 10, a support bearing 5 is arranged at the upper end of the shaft base 10, a thrust shaft 11 is arranged inside the thrust bearing 4, a counterweight block 6 is arranged outside the thrust shaft 11, and a thrust shaft 11 is arranged at one end of the thrust shaft 11. The loading device 7 is provided with a force sensor 8 at the upper end of the thrust loading device 7, and an airbag cylinder 9 is provided on one side of the thrust loading device 7. The thrust loading device 7 includes an anti-rotation key 12, a skeleton oil seal 13, a thrust plate 14, a thrust spherical roller bearing 15, a cylindrical roller bearing 16, an O-ring 17, a limiting screw sleeve 18, an airbag support 19, an end cover 20, an airbag 21, an airbag flange 22 and an anti-rotation seat 23. The thrust bearing 4 includes an annular oil chamber 29, a piston 30, a displacement sensor support 31, and a displacement sensor 32, which are beneficial to the loading and use of the device.

[0025] The motor base 1 and the variable frequency motor 2 are fixedly connected, the variable frequency motor 2 and the high elastic coupling 3 are movably connected, the upper end of the shaft system base 10 is fixedly connected with a thrust bearing 4, the shaft system base 10 and the support bearing 5 are fixedly connected, and the support bearings 5 ​​are in two groups and arranged in parallel, the outer side of the thrust shaft 11 is fixedly connected with a counterweight 6, and the counterweight 6 is made of metal material, which is conducive to the installation and use of the variable frequency motor 2.

[0026] The upper end of the shaft system base 10 is fixedly connected with a thrust loading device 7, one side of the thrust loading device 7 is fixedly and movably connected with a force sensor 8, and the force sensors 8 are in two groups and are symmetrically arranged, one side of the thrust loading device 7 is movably connected with an airbag cylinder 9, and the length of the shaft system base 10 is greater than the length of the motor base 1, which is conducive to the setting of the thrust loading device 7.

[0027] The thrust shaft 11 is a cylindrical structure, and the length of the thrust shaft 11 is smaller than the length of the shaft system base 10. The upper end of the shaft system base 10 is fixedly connected with an anti-rotation seat 23, and the upper end of the anti-rotation seat 23 is fixedly connected with an anti-rotation key 12. The outer side of the thrust shaft 11 is fixedly connected with a skeleton oil seal 13, and one side of the skeleton oil seal 13 is fixedly connected with a thrust plate 14, and the cross-sectional area of ​​the thrust plate 14 is larger than the cross-sectional area of ​​the skeleton oil seal 13. One side of the thrust shaft 11 is fixedly connected with a thrust spherical roller bearing 15, and the thrust spherical roller bearing 15 is a cylindrical structure, which is conducive to the use of the thrust shaft 11.

[0028] A cylindrical roller bearing 16 is movably connected to one side of the thrust spherical roller bearing 15, an O-ring 17 is fixedly connected to the outside of the cylindrical roller bearing 16, and the O-ring 17 is an O-shaped structure, an end cover 20 is fixedly connected to one side of the thrust shaft 11, a limiting screw sleeve 18 is connected to the outside of the end cover 20, and the cross-sectional area of ​​the limiting screw sleeve 18 is larger than the cross-sectional area of ​​the end cover 20, an airbag support 19 is fixedly connected to the outside of the limiting screw sleeve 18, and the airbag support 19 is fixedly connected to the shaft system base 10, which is conducive to the setting of the airbag support 19.

[0029] An airbag 21 is fixedly connected to one side of the end cover 20 , and the airbag 21 is a plastic structure. An airbag flange 22 is fixedly connected to one side of the airbag 21 , and the airbag flange 22 is made of metal material, which is conducive to the placement and use of the airbag 21 .

[0030] An annular oil chamber 29 is embedded in the thrust bearing 4 , and the annular oil chamber 29 is an annular structure. A piston 30 is movably connected to the inside of the annular oil chamber 29 , and the piston 30 is a movable structure, which is convenient for the use of the piston 30 .

[0031] A displacement sensor holder 31 is fixedly connected inside the thrust bearing 4 and is an annular structure. A displacement sensor 32 is fixedly connected to one end of the displacement sensor holder 31 . The displacement sensors 32 are in two groups and arranged symmetrically, which is convenient for the use of the displacement sensors 32 .

[0032] When working, the thrust loading device of the thrust bearing test bench, the user and the frequency conversion motor 2 are started, so that the thrust plate 14 is mounted on the thrust shaft 11 through the thrust spherical roller bearing 15 and the cylindrical roller bearing 16. The inner cavity of the thrust plate 14 is externally connected to the lubricating oil circulation cooling, and the two ends of the oil cavity are sealed by the skeleton oil seal 13 and the O-ring 17. The anti-rotation key 12 is used to limit the rotational movement of the thrust plate 14, that is, the thrust plate 14 only makes axial displacement, and the limit screw sleeve 18 is used for axial pre-positioning of the thrust shaft 11. The axial thrust generated by the airbag 21 after the pressurized gas is filled is transmitted to the thrust plate 14 through the flange of the airbag 21 and the force sensor 8. When the thrust reaches the set value, the air source in and out of the airbag 21 is closed. The compressed gas is sealed in the airbag 21 to complete the axial loading of the thrust bearing 4. The electric proportional valve 27 sets the pressure of the airbag 21. The gas circuit system is connected to a pressure transmitter 28 to measure the pressure of the airbag 21. The user sets the pressure of the airbag 21 on the existing control console. The thrust generated by the airbag 21 loads the thrust bearing 4 axially. The thrust of the airbag 21 is transmitted to the control console by the force sensor 8. The displacement of the thrust block of the thrust bearing 4 is measured by pre-filling the annular oil chamber 29 with hydraulic oil of a certain pressure. The thrust generated by the piston 30 under the action of the oil pressure is balanced with the propeller thrust, and the piston 30 is suspended on the hydraulic oil, and the hydraulic oil is used to reduce the vibration of the unsteady propeller thrust.

[0033] In summary, in the thrust loading device of the thrust bearing test bench, the thrust plate 14 is mounted on the thrust shaft 11 through the thrust spherical roller bearing 15 and the cylindrical roller bearing 16. The inner cavity of the thrust plate 14 is externally connected to the lubricating oil circulation cooling, and the two ends of the oil cavity are sealed by the skeleton oil seal 13 and the O-ring 17. The anti-rotation key 12 is used to limit the rotational movement of the thrust plate 14, that is, the thrust plate 14 only makes axial displacement, and the limit screw sleeve 18 is used for axial pre-positioning of the thrust shaft 11. Four force sensors 8 are evenly distributed on the thrust plate 14. The axial thrust generated by the airbag 21 after the pressurized gas is filled is transmitted to the thrust plate 14 through the airbag flange 22 and the force sensor 8. When the thrust reaches the set value, the air source inlet and outlet of the airbag 21 are closed, and the compressed gas is sealed in the airbag 21 to complete the thrust. The thrust bearing 4 is axially loaded, the electric proportional valve 27 sets the pressure of the airbag 21, and the pressure transmitter 28 is connected to the air circuit system to measure the pressure of the airbag 21. The user sets the pressure of the airbag 21 on the existing control console. The thrust generated by the airbag 21 loads the thrust bearing 4 axially. The thrust of the airbag 21 is transmitted to the control console by the force sensor 8. The displacement of the thrust block of the thrust bearing 4 is measured by pre-filling the annular oil chamber 29 with hydraulic oil of a certain pressure. The thrust generated by the piston 30 under the action of the oil pressure is balanced with the propeller thrust, and the piston 30 is suspended on the hydraulic oil. The hydraulic oil is used to reduce the vibration of the unsteady propeller thrust. The displacement sensor 32 measures the axial position of the thrust block and transmits it to the control console for display and record, which improves work efficiency and is easy to use.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thrust loading device for a thrust bearing test bench, comprising a motor base (1), a shaft base (10), an air compressor (24), a filter (25), a ball valve (26), an electric proportional valve (27) and a pressure transmitter (28), characterized in that: A variable frequency motor (2) is arranged at the upper end of the motor base (1), a high elastic coupling (3) is arranged on one side of the variable frequency motor (2), a thrust bearing (4) is arranged at the upper end of the shaft system base (10), a support bearing (5) is arranged at the upper end of the shaft system base (10), a thrust shaft (11) is arranged inside the thrust bearing (4), a counterweight (6) is arranged on the outer side of the thrust shaft (11), a thrust loading device (7) is arranged at one end of the thrust shaft (11), a force sensor (8) is arranged at the upper end of the thrust loading device (7), an air bag type cylinder (9) is arranged on one side of the thrust loading device (7), and the thrust loading device (7) includes an anti-rotation key (12), a frame An oil seal (13), a thrust plate (14), a thrust spherical roller bearing (15), a cylindrical roller bearing (16), an O-ring (17), a limiting screw sleeve (18), an airbag support (19), an end cover (20), an airbag (21), an airbag flange (22) and an anti-rotation seat (23); the thrust bearing (4) comprises an annular oil chamber (29), a piston (30), a displacement sensor support (31) and a displacement sensor (32); the thrust shaft (11) is a cylindrical structure, and the length of the thrust shaft (11) is less than the length of the shaft system base (10); the upper end of the shaft system base (10) is fixedly connected to the anti-rotation seat (23); the upper end of the anti-rotation seat (23) is fixedly connected to the anti-rotation key (12); the thrust shaft The outer side of the thrust shaft (11) is fixedly connected to a skeleton oil seal (13), one side of the skeleton oil seal (13) is fixedly connected to a thrust plate (14), the cross-sectional area of ​​the thrust plate (14) is larger than the cross-sectional area of ​​the skeleton oil seal (13), one side of the thrust shaft (11) is fixedly connected to a thrust spherical roller bearing (15), and the thrust spherical roller bearing (15) is a cylindrical structure; one side of the thrust spherical roller bearing (15) is movably connected to a cylindrical roller bearing (16), the outer side of the cylindrical roller bearing (16) is fixedly connected to an O-ring (17), and the O-ring (17) is an O-shaped structure, one side of the thrust shaft (11) is fixedly connected to an end cover (20), and the outer side of the end cover (20) is connected to a limit A screw sleeve (18), wherein the cross-sectional area of ​​the limiting screw sleeve (18) is greater than the cross-sectional area of ​​the end cover (20); the outer side of the limiting screw sleeve (18) is fixedly connected to an airbag support (19), and the airbag support (19) is fixedly connected to the shaft system base (10); one side of the end cover (20) is fixedly connected to an airbag (21), and the airbag (21) is a plastic structure; one side of the airbag (21) is fixedly connected to an airbag flange (22), and the airbag flange (22) is made of metal material; an annular oil chamber (29) is embedded inside the thrust bearing (4), and the annular oil chamber (29) is an annular structure; the inside of the annular oil chamber (29) is movably connected to a piston (30), and the piston (30) is a movable structure;A displacement sensor support (31) is fixedly connected inside the thrust bearing (4), and the displacement sensor support (31) is an annular structure. One end of the displacement sensor support (31) is fixedly connected to a displacement sensor (32), and the displacement sensors (32) are in two groups and are symmetrically arranged. ; 2. A thrust loading device for a thrust bearing test bench according to claim 1, characterized in that: The motor base (1) and the variable frequency motor (2) are fixedly connected, the variable frequency motor (2) and the high elastic coupling (3) are movably connected, the upper end of the shaft system base (10) is fixedly connected with a thrust bearing (4), the shaft system base (10) and the support bearing (5) are fixedly connected, and the support bearings (5) are in two groups and arranged in parallel, and the outer side of the thrust shaft (11) is fixedly connected with a counterweight (6), and the counterweight (6) is made of metal material.

3. The thrust loading device for a thrust bearing test bench according to claim 1, characterized in that: The upper end of the shaft system base (10) is fixedly connected to a thrust loading device (7), one side of the thrust loading device (7) is fixedly and movably connected to a force sensor (8), and the force sensors (8) are in two groups and are symmetrically arranged, one side of the thrust loading device (7) is movably connected to an airbag cylinder (9), and the length of the shaft system base (10) is greater than the length of the motor base (1).

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