Vibration test device of transmission shaft system

Abstract

The invention provides a vibration test device of a transmission shaft system, and belongs to the technical field of mechanical equipment tests. The vibration test device comprises a rack, a plurality of clamping assemblies and a plurality of detection assemblies, the plurality of clamping assemblies are located on the same side of the rack and spaced from the rack, the plurality of clamping assemblies are used for clamping a plurality of different parts of one shaft section of the transmission shaft system, and the plurality of detection assemblies are used for detecting the different parts of the shaft section of the transmission shaft system. The plurality of different parts are arranged at intervals along the length direction of the shaft section; the multiple detection assemblies are arranged at intervals in the length direction of the rack and correspond to the multiple clamping assemblies one to one, each detection assembly in the multiple detection assemblies is located between the corresponding clamping assembly and the rack, and the detection assemblies are connected with the rack and the clamping assemblies respectively. The detection assembly is used for obtaining detection data used for reflecting the vibration state of the shaft section. The detection precision of the test can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical equipment testing, and in particular relates to a vibration testing device for a transmission shaft system. Background Art

[0002] Long-axis electric deep-well pump is a pumping system designed for chemical tankers to realize the external delivery of liquid cargo. The system has functions such as liquid cargo unloading and tank sweeping to ensure the safety and efficiency of chemical tankers during transportation. Since the transmission shaft system in the long-axis electric deep-well pump is long, it is inevitable that the long-axis electric deep-well pump will vibrate when working. Excessive vibration will not only cause damage and failure of the equipment, but also cause noise, increase energy consumption and reduce work efficiency.

[0003] In the related art, in order to reduce the vibration of the long-shaft electric deep-well pump and reduce the wear and fatigue of the equipment, the electric deep-well pump needs to conduct a vibration test on the transmission shaft system through a test device in the early stage of design to determine the vibration condition of the transmission shaft system. The test device includes a drive motor and multiple vibration actuators, and multiple vibration sensors are connected to the motor at intervals. The motor is connected to the transmission shaft system and is used to drive the transmission shaft system to rotate. In this way, the vibration data detected by multiple vibration sensors can be used to feedback the vibration condition of the transmission shaft system.

[0004] However, since the above test device detects the vibration of the drive motor to feedback the vibration of the entire transmission shaft system, and since the transmission shaft system is very long, there will obviously be large deviations in the vibration between different parts. Therefore, the above detection process not only results in poor detection accuracy, but may even make the test results inaccurate. Summary of the invention

[0005] The embodiment of the present disclosure provides a vibration test device for a transmission shaft system, which can improve the detection accuracy. The technical solution is as follows:

[0006] An embodiment of the present disclosure provides a vibration test device for a transmission shaft system, wherein the transmission shaft system includes a plurality of coaxially connected shaft segments, and the vibration test device includes a test bench, a plurality of clamping components and a plurality of detection components, wherein the plurality of clamping components are all located on the same side of the test bench and are spaced apart from the test bench, the plurality of clamping components are used to clamp a plurality of different parts of one of the shaft segments of the transmission shaft system, and the plurality of different parts are spaced apart along the length direction of the shaft segment; the plurality of detection components are spaced apart along the length direction of the test bench and correspond one-to-one to the plurality of clamping components, each of the plurality of detection components is located between the corresponding clamping component and the test bench, the detection components are respectively connected to the test bench and the clamping components, and the detection components are used to obtain detection data reflecting the vibration state of the shaft segment.

[0007] In another implementation of the present disclosure, the detection assembly includes a tension and pressure sensor and a connecting rod, the opposite sides of the tension and pressure sensor are respectively connected to the stand and one end of the connecting rod, the other end of the connecting rod is connected to the clamping assembly, and the length direction of the connecting rod is perpendicular to the length direction of the stand.

[0008] In yet another implementation of the present disclosure, the detection assembly includes a vibration sensor, and the vibration sensor is respectively connected to the stand and the clamping assembly.

[0009] In yet another implementation of the present disclosure, the tension and pressure sensor is a spoke-type tension and pressure sensor.

[0010] In another embodiment of the present disclosure, the clamping assembly includes a plurality of first clamping units and a second clamping unit, the plurality of first clamping units are arranged at intervals along the length direction of the stand, and each of the plurality of first clamping units has a first lubrication cavity inside, the transmission shaft system passes through the first lubrication cavity of each of the first clamping units and is clearance-matched with each of the first clamping units; the second clamping unit is located on the same side of the plurality of first clamping units, and the second clamping unit is in contact with the end of the shaft segment, the second clamping unit has a second lubrication cavity inside, and one end of the shaft segment is located in the second lubrication cavity.

[0011] In another implementation of the present disclosure, the first clamping unit includes a first bearing seat and a first bearing; the first lubrication cavity is defined inside the first bearing seat, and the first bearing seat is connected to the detection assembly; the first bearing is located in the first bearing seat, and is interference fit with the first bearing seat on both opposite sides along its own radial direction, and the first bearing is clearance fit with the shaft section.

[0012] In another embodiment of the present disclosure, the second clamping unit includes a second bearing seat, a transmission sleeve and a second bearing, the second bearing seat defines the second lubrication cavity inside, and the second bearing seat is connected to the detection assembly; the transmission sleeve is located in the second bearing seat, and the coaxial sleeve is outside the end of the transmission shaft system, and the transmission sleeve is meshed with the transmission shaft system; the second bearing is located in the second bearing seat, and the interference sleeve is outside the transmission sleeve, and the two ends of the second bearing in the axial direction are respectively abutted against the outer wall of the transmission sleeve and the inner wall of the second bearing seat.

[0013] In another implementation of the present disclosure, the stand includes a fixed table and a plurality of brackets, the fixed table is a long strip structure, the plurality of brackets are arranged at intervals along the length direction of the fixed table on a side of the fixed table facing the detection component, and the plurality of brackets are all connected to the stand; the plurality of brackets correspond one-to-one to the plurality of detection components, and each of the plurality of brackets is connected to the detection component.

[0014] In another implementation of the present disclosure, the stand further includes a plurality of adjustment gaskets, the plurality of adjustment gaskets are arranged in one-to-one correspondence with the plurality of brackets, and each of the plurality of adjustment gaskets is clamped between the corresponding bracket and the detection assembly.

[0015] In another implementation of the present disclosure, the stand also includes a motor support frame, which is located on the same side of the multiple supports along the length direction of the fixed table, and the motor support frame is connected to the fixed table; the vibration testing device also includes a motor assembly, which is located on the same side of the multiple clamping assemblies along the length direction of the fixed table, and the motor assembly is connected to the motor support frame and to one end of the transmission shaft system for driving the transmission shaft system to rotate.

[0016] The technical solution provided by the embodiments of the present disclosure brings the following beneficial effects:

[0017] When the vibration test device provided by the embodiment of the present disclosure is used to perform a vibration test on the transmission shaft system, the transmission shaft system can be clamped and fixed by multiple clamping components. In this way, on the one hand, the transmission shaft system can be fixed, and on the other hand, the transmission shaft system can also apply tensile and compressive forces to the clamping components due to vibration during normal operation, so that the clamping components are stressed and the clamping components are driven to vibrate synchronously.

[0018] Since each detection component is located between the corresponding clamping component and the stand, and the detection components are connected to the stand and the clamping component respectively, on the one hand, the detection component can be fixed by the stand, and on the other hand, the detection data reflecting the vibration state of the clamping component can be obtained by the detection component, and then the vibration condition of the transmission shaft system can be calculated. Moreover, since multiple detection components are arranged at intervals along the extension direction of the stand, and multiple detection components correspond to multiple clamping components one by one, different parts of the shaft section can be detected by multiple detection components to further comprehensively reflect the vibration condition of the transmission shaft system and improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of a vibration test device for a transmission shaft system provided by an embodiment of the present disclosure;

[0021] Figure 2 yes Figure 1 A schematic diagram of the connection between the first clamping unit and the detection component;

[0022] Figure 3 yes Figure 1 A schematic diagram of the connection between the second clamping unit and the detection component;

[0023] Figure 4 yes Figure 1 Schematic diagram of the structure of the motor assembly.

[0024] The symbols in the figure mean the following:

[0025] 1. Stand; 11. Fixed stand; 12. Bracket; 121. Leg; 122. Support plate; 13. Adjusting gasket; 14. Motor support frame;

[0026] 2. Clamping assembly; 21. First clamping unit; 210. First lubrication cavity; 211. First bearing seat; 2110. Second screw; 2111. Bearing sleeve; 2112. Gland; 2113. First lip seal; 2115. Screw plug; 2116. Protrusion; 212. First bearing; 2121. Outer sleeve; 2122. Inner sleeve; 22. Second clamping unit; 220. Second lubrication cavity; 221. Second bearing seat; 2211. Inner flange; 222. Transmission sleeve; 2221. Outer flange; 223. Second bearing;

[0027] 3. Detection assembly; 31. Tension pressure sensor; 310. First screw; 32. Connecting rod; 33. Vibration sensor;

[0028] 4. Motor assembly; 41. Drive motor; 42. First half coupling; 43. Second half coupling; 44. First baffle; 45. Second baffle;

[0029] 5. Controller. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0031] The present disclosure provides a vibration test device for a transmission shaft system, such as Figure 1 As shown, the vibration test device comprises a stand 1, a plurality of clamping components 2 and a plurality of detection components 3. The length direction of the stand 1 is the same as the length direction of the transmission shaft system.

[0032] Multiple clamping assemblies 2 are all located on the same side of the gantry 1 and are spaced apart from the gantry 1. The multiple clamping assemblies 2 are used to clamp one of the shaft segments in the transmission shaft system and multiple different positions along the length direction of the shaft segment. Multiple detection assemblies 3 are arranged at intervals along the length direction of the gantry 1 and correspond one to one with the multiple clamping assemblies 2. Each of the multiple detection assemblies 3 is located between the corresponding clamping assembly 2 and the gantry 1. The detection assemblies 3 are respectively connected to the gantry 1 and the clamping assembly 2. The detection assemblies 3 are used to obtain detection data reflecting the vibration state of the transmission shaft system.

[0033] When the vibration test device provided by the embodiment of the present disclosure is used to perform a vibration test on a transmission shaft system, multiple different components in the length direction of a shaft section in the transmission shaft system can be clamped and fixed by multiple clamping assemblies 2. In this way, on the one hand, the shaft section can be fixed, and on the other hand, the shaft section can also apply a force to the clamping assembly 2 due to vibration during normal operation, thereby driving the clamping assembly 2 to vibrate synchronously.

[0034] Since each detection component 3 is located between the corresponding clamping component 2 and the stand 1, the detection component 3 is connected to the stand 1 and the clamping component 2 respectively, so that on the one hand, the detection component 3 can be fixed by the stand 1, and on the other hand, the detection data reflecting the vibration state of the shaft segment can be obtained by the detection component 3 to determine the vibration condition of the shaft segment. Since multiple detection components 3 are arranged at intervals along the length direction of the stand 1, and multiple detection components 3 correspond to multiple clamping components 2 one by one, different parts of the shaft segment can be detected by multiple detection components 3 to further comprehensively reflect the vibration condition of the transmission shaft system and improve the detection accuracy.

[0035] Moreover, since the transmission shaft system usually consists of multiple coaxially connected shaft sections, the vibration conditions of other shaft sections can be reproduced by inspecting one of the shaft sections. It can be seen that the above vibration test device can efficiently and comprehensively detect the vibration conditions of the transmission shaft system.

[0036] In the embodiment of the present disclosure, the detection data includes at least one of vibration data and force data. When the detection data is force data, the detection component 3 may be of the following structure:

[0037] Figure 2 yes Figure 1 Schematic diagram of the connection between the first clamping unit and the detection component, combined with Figure 2 Optionally, the detection assembly 3 includes a tension and pressure sensor 31 and a connecting rod 32, and opposite sides of the tension and pressure sensor 31 are respectively connected to the stand 1 and one end of the connecting rod 32. The other end of the connecting rod 32 is connected to the clamping assembly 2, and the length direction of the connecting rod 32 is perpendicular to the length direction of the stand 1.

[0038] In the above implementation, the tension and pressure sensor 31 is used to detect the force applied to the connecting rod 32. The connecting rod 32 is used to be connected to the clamping assembly 2 so that the force applied to the clamping assembly 2 can be reflected through the connecting rod 32.

[0039] In the disclosed embodiment, for the convenience of connection, the connecting rod 32 is a screw, one end of which is inserted into the tension and pressure sensor 31 and threadedly connected to the tension and pressure sensor 31, and the other end of which is inserted into the clamping assembly 2 and threadedly connected to the clamping assembly 2. The middle part of the screw is threadedly connected to a nut, and one end of the nut is in contact with the tension and pressure sensor 31. The thread rotation direction of the connection between the screw and the nut is opposite to the thread rotation direction of the connection between the screw and the tension and pressure sensor 31. In this way, the connecting rod 32 can be locked by the nut so that the connecting rod 32 will not rotate.

[0040] Moreover, by setting the connecting rod 32 as a screw rod, the position of each clamping component 2 relative to the transmission shaft system can be adjusted by adjusting the connection length of the connecting rod 32 inserted into the clamping component 2, so that the clamping component 2 is coaxial with the transmission shaft system.

[0041] In other examples, the detection component 3 may also be other structures, for example, the tension and pressure sensor 31 is directly fixed in the clamping component 2, eliminating the connecting rod 32. As long as the force or force and vibration of the clamping component 2 can be conveniently detected, the present disclosure does not limit the structure of the detection component 3.

[0042] Exemplarily, the tension and pressure sensor 31 is a spoke-type tension and pressure sensor. This makes it easy to connect and fix with the stand 1 and the clamping assembly 2. Since the spoke-type tension and pressure sensor has a circular shape, the tension and pressure sensor can be fixed on the stand 1 by arranging a plurality of fasteners such as first screws 310 along the outer circle of the spoke-type tension and pressure sensor at intervals. Then, a connecting rod 32 is arranged in the middle of the spoke-type tension and pressure sensor, so that the connecting rod 32 and the tension and pressure sensor 31 can be connected together. Since the connecting rod 32 is connected to the center of the spoke-type tension and pressure sensor, the force applied by the connecting rod 32 to the spoke-type tension and pressure sensor is located at the center of the spoke-type tension and pressure sensor, so that the detection accuracy of the spoke-type tension and pressure sensor is higher.

[0043] When the detection data is only vibration data, the detection component 3 may be of the following structure:

[0044] See again Figure 1 Optionally, the detection component 3 includes a vibration sensor 33, and the vibration sensor 33 is respectively connected to the stand 1 and the clamping component 2. In this way, the vibration condition of the clamping component 2 when working on the shaft section of the transmission shaft system can be detected by the vibration sensor 33, and then the vibration condition of the transmission shaft system can be determined.

[0045] When the detection data includes force data and vibration data, the detection component 3 may be of the following structure:

[0046] The detection assembly 3 includes a tension and pressure sensor 31, a connecting rod 32, and a vibration sensor 33. At this time, the structure and connection method of the tension and pressure sensor 31 and the connecting rod 32 are the same as those in the above text when the detection data only includes force data, and at this time, the vibration sensor 33 is connected to the tension and pressure sensor 31 and the stand 1 respectively. In this way, the vibration condition of the tension and pressure sensor 31 when it is subjected to force can be detected by the vibration sensor 33, and then the vibration condition of the shaft section can be determined.

[0047] For example, the vibration sensor 33 may be any one of an acceleration sensor, a velocity sensor, and a displacement sensor, and the corresponding vibration frequency and vibration intensity may be inferred by detecting the displacement and velocity of the tension and pressure sensor 31 or the clamping assembly 2. As long as the vibration of the tension and pressure sensor 31 or the clamping assembly 2 can be conveniently detected, the present disclosure does not limit the type or structure of the vibration sensor 33.

[0048] See again Figure 1 Optionally, the clamping assembly 2 includes a plurality of first clamping units 21 and a second clamping unit 22. The plurality of first clamping units 21 are arranged at intervals along the length direction of the platform 1, and each first clamping unit 21 has a first lubrication cavity 210 inside, and the shaft section of the transmission shaft system passes through the first lubrication cavity 210 of each first clamping unit 21 and is clearance-matched with each first clamping unit 21.

[0049] The second clamping unit 22 is located on the same side of the plurality of first clamping units 21 , and contacts the end of the shaft segment of the transmission shaft system. The second clamping unit 22 has a second lubrication cavity 220 therein, and one end of the shaft segment of the transmission shaft system is located in the second lubrication cavity 220 .

[0050] In the above implementation, the clamping component 2 is set to multiple first clamping units 21, so that not only can the middle part of the shaft segment be supported and limited by the multiple first clamping units 21, but the first clamping unit 21 can also simulate the corresponding clamping state of the shaft segment when it is in a working state, so as to truly reflect the actual state of the shaft segment, and the first clamping unit 21 can also be used to provide a detection position for the detection component 3, so as to determine the corresponding vibration and force conditions of the transmission shaft system during normal operation, and finally the detection accuracy is greatly improved through the above settings.

[0051] A second clamping unit 22 is further provided in the clamping assembly 2, and the end of the shaft segment can be supported by the second clamping unit 22, and another detection position different from the above is provided for the detection assembly 3. Moreover, the arrangement of the first lubrication cavity 210 and the second lubrication cavity 220 can cool and lubricate the shaft segment, so as to further truly present the actual working state of the shaft segment.

[0052] That is to say, the arrangement of the above-mentioned clamping components 2 can be set according to the arrangement of the corresponding clamping components during the normal operation of the shaft segment, so that during detection, the transmission shaft system can be consistent with the actual working state, thereby avoiding the reduction of detection accuracy due to different installation environments or setting conditions of the transmission shaft system.

[0053] Optionally, the first clamping unit 21 includes a first bearing seat 211 and a first bearing 212. The first bearing seat 211 has a first lubrication cavity 210 therein, and the first bearing seat 211 is connected to the detection assembly 3. The first bearing 212 is located in the first bearing seat 211, and is respectively interference fit with the first bearing seat 211 on two opposite sides along its radial direction, and the first bearing 212 is clearance fit with the shaft section.

[0054] In the above implementation, the first bearing seat 211 is used to provide a mounting base for the first bearing 212 , and is also used to define the first lubrication cavity 210 .

[0055] The first bearing 212 is used to be connected to the shaft segment so as to support the shaft segment and reduce the friction between the shaft segment and the first bearing seat 211 .

[0056] In the disclosed embodiment, since the first bearing 212 and the shaft segment are clearance fit, in order to reduce the friction between the first bearing 212 and the shaft segment and improve the wear resistance of the first bearing 212, the first bearing 212 includes an outer sleeve 2121 and an inner sleeve 2122 fixed on the outer sleeve 2121, the inner sleeve 2122 is sleeved outside the transmission shaft system, the outer wall of the outer sleeve 2121 and the inner wall of the first bearing seat 211 are interference fit, and the inner wall of the inner sleeve 2122 and the outer wall of the transmission shaft system are clearance fit.

[0057] The outer sleeve 2121 is a rubber sleeve, the inner sleeve 2122 is an engineering plastic sleeve (such as polytetrafluoroethylene), and oil seepage ring grooves are formed between the two ends of the outer sleeve 2121 along the axial direction and the transmission shaft system.

[0058] The outer sleeve 2121 facilitates setting a suitable tensioning force between the first bearing seat 211 and the transmission shaft system, and the inner sleeve 2122 facilitates ensuring that the transmission shaft system can effectively avoid wear caused by contact between the first bearing 212 and the transmission shaft system when the transmission shaft system rotates. The oil seepage ring groove helps the circulation of lubricating oil inside the first bearing seat 211 and facilitates setting a suitable tensioning force between the first bearing 212 and the first bearing seat 211, thereby ensuring that the first bearing 212 can be fixed inside the first bearing seat 211 and does not fall off, and also facilitates the installation of the first bearing 212 in the first bearing seat 211.

[0059] Optionally, the first bearing seat 211 includes a bearing sleeve 2111 and two glands 2112, the bearing sleeve 2111 is coaxially sleeved outside the first bearing 212 and outside the transmission shaft system, and the outer wall of the bearing sleeve 2111 is connected to the detection component 3. The two glands 2112 are respectively located at opposite ends of the bearing sleeve 2111 along the axial direction of the bearing sleeve 2111, and the two glands 2112 are respectively connected to the bearing sleeve 2111, and the two glands 2112 and the bearing sleeve 2111 define a first lubrication cavity 210. The transmission shaft system passes through the two glands 2112.

[0060] In the above implementation, the first bearing seat 211 is configured as the above detachable structure, and the first bearing 212 can be easily installed in the first bearing seat 211 by removing the pressure cover 2112.

[0061] Exemplarily, the pressure cover 2112 and the bearing sleeve 2111 are connected together by fasteners such as a plurality of second screws 2110 .

[0062] Optionally, the first bearing seat 211 further includes two first lip-shaped sealing rings 2113, and the two first lip-shaped sealing rings 2113 correspond one by one to the two pressure covers 2112 respectively, and each of the two first lip-shaped sealing rings 2113 is clamped between the corresponding first pressure cover 2112 and the transmission shaft system.

[0063] In the above implementation, since the transmission shaft system rotates, a dynamic seal is formed between the transmission shaft system and the gland 2112. Since the lip of the first lip seal ring 2113 is deformed under the action of the hydraulic pressure, the lip edge is tightly attached to the sealing surface to achieve sealing. The higher the hydraulic pressure, the tighter the lip edge is attached to the sealing surface. After the sealing lip edge is worn, it also has a certain automatic compensation ability. Therefore, the provision of the first lip seal ring can effectively improve the sealing between the transmission shaft system and the gland 2112.

[0064] Optionally, in order to further improve the sealing performance between the gland 2112 and the bearing sleeve 2111, the two end surfaces of the bearing sleeve 2111 facing the two glands 2112 are respectively provided with sealing grooves, in which O-type sealing rings are installed. The O-type sealing ring is sandwiched between the gland 2112 and the bearing sleeve 2111.

[0065] In the disclosed embodiment, in order to facilitate the discharge of the lubricating oil in the first lubricating cavity 210 and the filling of the lubricating oil into the first lubricating cavity 210, a circulation hole is provided in each gland 2112, and the two ends of the circulation hole are respectively located at the opposite end surfaces of the gland 2112 along the axial direction of the bearing sleeve 2111. A screw plug 2115 is provided in the circulation hole, and the screw plug 2115 is threadedly inserted in the circulation hole. When the lubricating oil in the first lubricating cavity 210 needs to be discharged, the screw plug 2115 can be removed from the circulation hole, so that the lubricating oil in the first lubricating cavity 210 can be discharged through the circulation hole. Alternatively, when the lubricating oil needs to be filled into the first lubricating cavity 210, the screw plug 2115 can be removed from the circulation hole, so that the lubricating oil enters the first lubricating cavity 210 through the circulation hole.

[0066] In the disclosed embodiment, the lubricating oil is VG46 hydraulic oil.

[0067] Exemplarily, a protrusion 2116 is provided in the outer wall of the bearing sleeve 2111 on the side facing the detection component 3, and the detection component 3 is connected to the protrusion 2116. The arrangement of the protrusion 2116 facilitates the connection of the detection component 3.

[0068] Figure 3 yes Figure 1 The connection diagram between the second clamping unit and the detection component, combined with Figure 3 Optionally, the second clamping unit 22 includes a second bearing seat 221, a transmission sleeve 222 and a second bearing 223. The second bearing seat 221 defines a second lubrication cavity 220 therein, and the second bearing seat 221 is connected to the detection assembly 3.

[0069] The transmission sleeve 222 is located in the second bearing seat 221 and is coaxially sleeved outside the end of the shaft section, and the transmission sleeve 222 is meshed with the shaft section. The second bearing 223 is located in the second bearing seat 221 and is interference sleeved outside the transmission sleeve 222, and the two ends of the second bearing 223 in the axial direction are respectively in contact with the outer wall of the transmission sleeve 222 and the inner wall of the second bearing seat 221.

[0070] In the above implementation, the second bearing seat 221 is used to provide a mounting base for the second bearing 223 and the transmission sleeve 222 , and is also used to define the second lubrication cavity 220 .

[0071] Since the transmission shaft system is very long, it is generally formed by multiple shaft sections coaxially connected together. The shaft sections are usually connected by transmission sleeves. That is, the same transmission sleeve is sleeved outside the two adjacent shaft sections that are butt-jointed, and the transmission sleeve is meshed with both adjacent shaft sections. Between two adjacent shaft sections, if one shaft section rotates, the other shaft section can be driven to rotate synchronously, so that the synchronous rotation of the two shaft sections can be simply achieved through the transmission sleeve. In order to further simulate the installation environment of the transmission shaft system, a transmission sleeve is also sleeved outside the end of the shaft section during the test. In this way, the connection between the two shaft sections in the transmission shaft system can be simulated through the transmission sleeve 222, and then the corresponding vibration and force conditions of this part can be detected. The second bearing 223 is used to support the transmission sleeve 222.

[0072] Exemplarily, the second bearing 223 is a deep groove ball bearing, which can bear a large radial load of the transmission shaft system.

[0073] In the disclosed embodiment, in order to limit the second bearing 223 , the outer wall of the transmission sleeve 222 has an outer flange 2221 , the inner wall of the second bearing seat 221 has an inner flange 2211 , and the two ends of the second bearing 223 are respectively abutted against the outer flange 2221 and the inner flange 2211 .

[0074] In the disclosed embodiment, the second bearing seat 221 has the same structure as the first bearing seat 211, and the only difference is that the shape of the second bearing seat 221 is slightly different from that of the first bearing seat 211, and there is no lip seal ring sandwiched between one of the glands 2112 and the end of the shaft section in the second bearing seat 221, and the installation position of one of the screw plugs 2115 is different. The two screw plugs 2115 in the first bearing seat 211 are inserted into the two glands 2112, and each screw plug 2115 is located between the first lip seal ring 2113 and the outer circle of the gland 2112. One of the two screw plugs 2115 in the second bearing seat 221 is located at the center of the gland 2112 without a lip seal ring sandwiched therein. No further details will be given here.

[0075] See again Figure 1 Optionally, the stand 1 includes a fixed table 11 and a plurality of brackets 12 , the fixed table 11 is a long strip structure, the plurality of brackets 12 are arranged at intervals along the length direction of the fixed table 11 on a side of the fixed table 11 facing the detection component 3 , and the plurality of brackets 12 are all connected to the fixed table 11 .

[0076] The multiple brackets 12 correspond to the multiple detection components 3 one by one, and each bracket 12 in the multiple brackets 12 is connected to the detection component 3.

[0077] In the above implementation, the fixing platform 11 is used to provide a mounting base for the plurality of brackets 12 , and the plurality of brackets 12 are used to provide a mounting base for the plurality of detection components 3 .

[0078] Exemplarily, the bracket 12 includes a plurality of legs 121 and a support plate 122, wherein the plurality of legs 121 are parallel to each other and are arranged at intervals between the fixed platform 11 and the support plate 122. One end of each leg 121 is connected to the fixed platform 11, and the other end of each leg 121 is connected to the support plate 122. All the support plates 122 are located in the same plane and are parallel to the axis of the transmission shaft system. The support plate 122 is connected to the tension and pressure sensors 31 in the detection assembly 3. In this way, the tension and pressure sensors 31 in each detection assembly 3 can be installed in the same plane, so that each detection assembly 3 will not affect the coaxiality of each clamping assembly 2 during installation.

[0079] For the convenience of manufacturing, the legs 121 and the support plate 122 are connected together by welding, or the legs 121 and the support plate 122 are an integral structure. The legs 121 and the fixed platform 11 are also connected together by welding. The support plate 122 and the tension and pressure sensor 31 are connected together by fasteners such as bolts. This not only facilitates the disassembly and assembly of the two, but also facilitates the adjustment of the position of the tension and pressure sensor 31 relative to the support plate 122, so that the coaxiality of each clamping assembly 2 meets the requirements.

[0080] Optionally, the stand 1 further includes a plurality of adjustment gaskets 13 , which are arranged in one-to-one correspondence with the plurality of brackets 12 , and each of the plurality of adjustment gaskets 13 is clamped between the corresponding bracket 12 and the detection component 3 .

[0081] In the above implementation, the arrangement of the adjustment gasket 13 can adjust the position of the detection component 3 relative to the corresponding bracket 12, and then the straightness of the simulated transmission shaft tube can be achieved by changing the thickness of the adjustment gasket.

[0082] When the transmission shaft system is installed on a ship, the bulkhead of the cabin will be deformed due to force or other reasons. Therefore, in order to truly simulate the use environment of the transmission shaft system, the thickness of the gasket can be changed to make the transmission shaft system conform to the actual situation.

[0083] In the disclosed embodiment, the gasket may be a metal part or a composite material structural part.

[0084] Optionally, the stand 1 further includes a motor support frame 14 , which is located on the same side of the plurality of brackets 12 along the length direction of the fixing platform 11 , and is connected to the fixing platform 11 .

[0085] The vibration test device further includes a motor assembly 4, which is located on the same side of the plurality of clamping assemblies 2 along the length direction of the fixing platform 11. The motor assembly 4 is connected to the motor support frame 14 and to one end of the transmission shaft system, and is used to drive the transmission shaft system to rotate.

[0086] In the above implementation, the motor support frame 14 is used to install the motor assembly 4. The motor assembly 4 is used to drive the transmission shaft system to rotate, so that the transmission shaft system is in a rotating state during detection.

[0087] Figure 4 yes Figure 1 The schematic diagram of the motor assembly, combined with Figure 4 Optionally, the motor assembly 4 includes a drive motor 41, a first half coupling 42 and a second half coupling 43. The drive motor 41 is located on the motor support frame 14 and connected to the motor support frame 14. The first half coupling 42 is sleeved outside the output shaft of the drive motor 41 and connected to the output shaft of the drive motor 41 through a flat key. The two ends of the first half coupling 42 in the axial direction are respectively engaged with the output shaft of the drive motor 41.

[0088] The second half coupling 43 is sleeved outside one end of the output shaft of the transmission shaft system facing the drive motor 41 , the second half coupling 43 is meshed with the transmission shaft system, and the second half coupling 43 is connected to the first half coupling 42 .

[0089] In the above implementation, the first half coupling 42 and the second half coupling 43 cooperate to connect the output shaft of the drive motor 41 with the transmission shaft system, so that the transmission shaft system can rotate synchronously with the output shaft of the drive motor 41.

[0090] When the drive motor 41 is started, the output shaft of the drive motor 41 starts to rotate, and the output shaft of the drive motor 41 drives the first half coupling 42 to rotate through the flat key. Since the second half coupling 43 is connected to the first half coupling 42 by bolts, etc., the second half coupling 43 will rotate synchronously with the first half coupling 42. Since the second half coupling 43 is meshed with the end of the transmission shaft system, after the second half coupling 43 rotates, the transmission shaft system will synchronously follow the second half coupling 43 to rotate under the meshing of the teeth, so that the transmission shaft system and the output shaft of the drive motor can be synchronously rotated.

[0091] In the disclosed embodiment, in order to further install the first half coupling 42 and the second half coupling 43, the motor assembly 4 includes a first baffle 44 and a second baffle 45. The first baffle 44 is fixed to the end face of the drive motor 41 facing the transmission shaft system by fasteners such as bolts, and the first baffle 44 abuts against one end of the first half coupling 42. The other end of the first half coupling 42 abuts against the shoulder of the output shaft of the drive motor. In this way, the first half coupling 42 can be axially limited on the output shaft of the drive motor 41, so that the first half coupling 42 will not move axially relative to the output shaft of the drive motor 41.

[0092] The second baffle 45 is fixed to the end face of one end of the transmission shaft system facing the drive motor 41 by fasteners such as bolts, and the second baffle 45 abuts against the inner wall of the second half coupling 43, so that the second half coupling 43 can be axially limited outside the transmission shaft system, so that the second half coupling 43 will not move axially relative to the transmission shaft system.

[0093] Combination Figure 1 Optionally, the vibration test device further includes a controller 5 , which is electrically connected to the plurality of detection components 3 , and is used to determine the vibration condition of the transmission shaft system based on data detected by the detection components 3 .

[0094] In the above implementation, the controller 5 is used to record and save the data detected by the detection component 3, and then evaluate and calculate the vibration condition of the transmission shaft system based on the detected data.

[0095] Exemplarily, the controller 5 may be a processor, a computer, or an industrial computer including a logic programming program, etc.

[0096] The following briefly introduces the working process of the vibration test device provided by the embodiment of the present disclosure:

[0097] One of the shaft segments in the transmission shaft system to be tested is clamped and limited by multiple clamping assemblies 2, and the shaft segment is connected to the motor assembly 4. Then, the position of the connecting rod 32 in each detection assembly 3 relative to the corresponding clamping assembly 2 is adjusted so that the straightness of the clamping assembly 2 and the transmission shaft system meets the requirements. Then, the driving motor 41 in the motor assembly 4 is started to make the shaft segment start to rotate, and the force and vibration of different parts of the shaft segment are detected by the detection assembly.

[0098] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A vibration test device for a transmission shaft system, characterized in that: The transmission shaft system comprises a plurality of coaxially connected shaft sections, the vibration test device comprises a stand (1), a plurality of clamping components (2) and a plurality of detection components (3), The multiple clamping assemblies (2) are all located on the same side of the platform (1) and are spaced apart from the platform (1); the multiple clamping assemblies (2) are used to clamp multiple different parts of one shaft segment of the transmission shaft system, and the multiple different parts are spaced apart along the length direction of the shaft segment; The multiple detection components (3) are arranged at intervals along the length direction of the platform (1) and correspond one-to-one to the multiple clamping components (2). Each detection component (3) among the multiple detection components (3) is located between the corresponding clamping component (2) and the platform (1). The detection components (3) are respectively connected to the platform (1) and the clamping component (2). The detection components (3) are used to obtain detection data reflecting the vibration state of the shaft segment.

2. The vibration test device according to claim 1, characterized in that: The detection assembly (3) comprises a tension and pressure sensor (31) and a connecting rod (32), and opposite sides of the tension and pressure sensor (31) are respectively connected to the stand (1) and one end of the connecting rod (32); The other end of the connecting rod (32) is connected to the clamping assembly (2), and the length direction of the connecting rod (32) is perpendicular to the length direction of the stand (1).

3. The vibration test device according to claim 1, characterized in that: The detection component (3) comprises a vibration sensor (33), and the vibration sensor (33) is respectively connected to the stand (1) and the clamping component (2).

4. The vibration test device according to claim 2, characterized in that: The tension and pressure sensor (31) is a spoke-type tension and pressure sensor.

5. The vibration test device according to any one of claims 1 to 4, characterized in that: The plurality of clamping assemblies (2) include a plurality of first clamping units (21) and a second clamping unit (22), The plurality of first clamping units (21) are arranged at intervals along the length direction of the stand (1), and each of the plurality of first clamping units (21) has a first lubrication cavity (210) inside, and the shaft section passes through the first lubrication cavity (210) of each of the first clamping units (21) and is clearance-matched with each of the first clamping units (21); The second clamping unit (22) is located on the same side of the plurality of first clamping units (21), and the second clamping unit (22) is engaged with the end of the shaft segment, and a second lubrication cavity (220) is provided in the second clamping unit (22), and one end of the shaft segment is located in the second lubrication cavity (220).

6. The vibration test device according to claim 5, characterized in that: The first clamping unit (21) comprises a first bearing seat (211) and a first bearing (212); The first bearing seat (211) defines the first lubrication cavity (210) inside, and the first bearing seat (211) is connected to the detection component (3); The first bearing (212) is located in the first bearing seat (211), and is interference-fitted with the first bearing seat (211) on two opposite sides along its radial direction, and the first bearing (212) is clearance-fitted with the shaft section.

7. The vibration test device according to claim 5, characterized in that: The second clamping unit (22) comprises a second bearing seat (221), a transmission sleeve (222) and a second bearing (223). The second bearing seat (221) defines a second lubrication cavity (220) therein, and the second bearing seat (221) is connected to the detection assembly (3); The transmission sleeve (222) is located in the second bearing seat (221) and is coaxially sleeved outside the end of the transmission shaft system, and the transmission sleeve (222) is meshed with the transmission shaft system; The second bearing (223) is located in the second bearing seat (221) and is interference-fitted outside the transmission sleeve (222); two ends of the second bearing (223) in the axial direction are respectively in contact with the outer wall of the transmission sleeve (222) and the inner wall of the second bearing seat (221).

8. The vibration test device according to any one of claims 1 to 4 and 6 to 7, characterized in that: The stand (1) comprises a fixed platform (11) and a plurality of brackets (12); the fixed platform (11) is a long strip structure; the plurality of brackets (12) are arranged at intervals along the length direction of the fixed platform (11) on a side of the fixed platform (11) facing the detection component (3); and the plurality of brackets (12) are all connected to the fixed platform (11); The plurality of brackets (12) correspond one-to-one to the plurality of detection components (3), and each bracket (12) among the plurality of brackets (12) is connected to the detection component (3).

9. The vibration test device according to claim 8, characterized in that: The stand (1) further comprises a plurality of adjustment gaskets (13), wherein the plurality of adjustment gaskets (13) are arranged in one-to-one correspondence with the plurality of brackets (12), and each of the plurality of adjustment gaskets (13) is clamped between the corresponding bracket (12) and the detection component (3).

10. The vibration test device according to claim 8, characterized in that: The stand (1) further comprises a motor support frame (14), wherein the motor support frame (14) is located on the same side of the plurality of brackets (12) along the length direction of the fixed platform (11), and the motor support frame (14) is connected to the fixed platform (11); The vibration test device further comprises a motor assembly (4), wherein the motor assembly (4) is located on the same side of the plurality of clamping assemblies (2) along the length direction of the fixed platform (11), the motor assembly (4) is connected to the motor support frame (14) and to one end of the transmission shaft system, and the motor assembly (4) is used to drive the transmission shaft system to rotate.

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