CN-122016214-A - Vibration testing device of non-contact oscillating tooth speed reducer

CN122016214ACN 122016214 ACN122016214 ACN 122016214ACN-122016214-A

Abstract

The invention discloses a vibration testing device of a non-contact movable tooth speed reducer, which belongs to the technical field of speed reducer testing and comprises a Doppler laser vibration meter, a dual-multi-degree-of-freedom pose adjusting device of the vibration meter and the speed reducer, an annular hammering device and a bearing base, wherein the annular hammering device comprises a circumferential moving mechanism and a spring energy storage type constant force hammering mechanism. The dual-position posture device is cooperatively regulated to realize accurate alignment of the vibration meter and the speed reducer, the circumferential moving mechanism drives the hammering mechanism to move around the axis of the speed reducer at multiple angles, the constant-force hammering mechanism outputs constant exciting force, and the vibration meter calculates vibration acceleration signals based on a laser Doppler effect in a non-contact mode. The invention realizes multi-pose and multi-angle automatic test and greatly improves the accuracy, repeatability and test efficiency of test data.

Inventors

YI YALI
ZHOU XUKANG
SONG CHAOSHENG
MA YUNFEI
ZHANG SHUANG
JIN HERONG

Assignees

燕山大学
重庆大学

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. The vibration testing device for the non-contact oscillating tooth speed reducer is characterized by comprising a Doppler laser vibration meter, a vibration meter multi-degree-of-freedom pose adjusting device, an oscillating tooth speed reducer, a speed reducer multi-degree-of-freedom pose adjusting device, an annular hammering device and a bearing base, wherein the Doppler laser vibration meter is arranged at the executing end of the vibration meter multi-degree-of-freedom pose adjusting device, the oscillating tooth speed reducer is arranged at the executing end of the speed reducer multi-degree-of-freedom pose adjusting device, the vibration meter multi-degree-of-freedom pose adjusting device and the speed reducer multi-degree-of-freedom pose adjusting device are both arranged on the bearing base, the vibration meter multi-degree-of-freedom pose adjusting device is correspondingly arranged at the detecting side of the speed reducer multi-degree-of-freedom pose adjusting device, and the annular hammering device and the oscillating tooth speed reducer are coaxially arranged; the annular hammering device comprises a circumferential moving mechanism and a spring energy storage type constant force hammering mechanism, the constant force hammering mechanism is arranged at the moving end of the circumferential moving mechanism, the circumferential moving mechanism can drive the constant force hammering mechanism to do circumferential multi-angle movement around the axis of the movable tooth speed reducer, and the constant force hammering mechanism can output hammering excitation of constant exciting force.
2. The vibration testing device of the non-contact oscillating tooth speed reducer is characterized in that the multi-degree-of-freedom pose adjusting device of the vibration meter comprises a displacement adjusting mechanism and an angle adjusting mechanism, wherein the displacement adjusting mechanism is fixedly arranged on the bearing base, the angle adjusting mechanism is arranged at the moving end of the displacement adjusting mechanism, and the Doppler laser vibration meter is arranged at the executing end of the angle adjusting mechanism; The displacement adjusting mechanism comprises an X-axis linear displacement device arranged along the horizontal detection direction and a Z-axis linear displacement device arranged along the vertical direction, and the angle adjusting mechanism is a double-angle adjusting device integrating pitch angle and azimuth angle adjustment.
3. The vibration testing device of the non-contact oscillating tooth speed reducer is characterized in that the X-axis linear displacement device comprises a base, guide rail assemblies, sliding tables, screw rod transmission assemblies and driving motors, wherein the guide rail assemblies are symmetrically arranged on two sides of the base, the sliding tables are in sliding fit with the guide rail assemblies, the screw rod transmission assemblies are arranged along symmetrical shafts of the base, a power input end of each screw rod transmission assembly is coaxially connected with an output shaft of the driving motor, a transmission end of each screw rod transmission assembly is in threaded fit with each sliding table, and the driving motors drive the sliding tables to do X-direction linear reciprocating movement along the guide rail assemblies through the screw rod transmission assemblies.
4. The vibration testing device of the non-contact oscillating tooth speed reducer is characterized in that the angle adjusting mechanism comprises a rotating platform, a first outer U-shaped plate, a first inner U-shaped plate and a worm and worm gear transmission assembly, wherein the first outer U-shaped plate is arranged on the rotating platform, the first inner U-shaped plate is rotationally connected with the first outer U-shaped plate through a connecting shaft, the fixed end of the worm and worm gear transmission assembly is arranged on the first outer U-shaped plate, the power output end of the worm and worm gear transmission assembly is connected with the first connecting shaft, the worm gear transmission assembly drives the first inner U-shaped plate to rotate around the first connecting shaft to achieve pitch angle adjustment, the rotating platform rotates around a vertical axis to achieve azimuth angle adjustment, and the Doppler laser vibration meter is arranged on the first inner U-shaped plate.
5. The vibration testing device of the non-contact oscillating tooth reducer is characterized by comprising a base plate, a rotation adjusting mechanism and a swing adjusting mechanism, wherein the base plate is fixedly arranged on a bearing base, the rotation adjusting mechanism is arranged on the base plate, the swing adjusting mechanism is arranged at the top of the rotation adjusting mechanism, the oscillating tooth reducer is arranged at the executing end of the swing adjusting mechanism, the rotation adjusting mechanism drives the swing adjusting mechanism and the oscillating tooth reducer to rotate around a vertical axis to realize azimuth angle adjustment, and the swing adjusting mechanism drives the oscillating tooth reducer to rotate around a horizontal axis to realize pitch angle adjustment.
6. The vibration testing device of the non-contact oscillating tooth reducer is characterized in that the oscillating adjusting mechanism comprises a second outer U-shaped plate, a second inner U-shaped plate, an oscillating tooth reducer mounting seat, a worm and worm wheel driving assembly and a counterweight aligning assembly, wherein the oscillating tooth reducer mounting seat is arranged on the upper end face of the second inner U-shaped plate, the second inner U-shaped plate is rotationally connected with the second outer U-shaped plate through a second connecting shaft, the worm and worm wheel driving assembly is arranged on the second outer U-shaped plate and is in transmission fit with the second connecting shaft, and the counterweight aligning assembly is arranged on the lower end face of the second inner U-shaped plate and can enable the gravity center of the second inner U-shaped plate to be lowered to the oscillating center through counterweight adjustment.
7. The vibration testing device of the non-contact oscillating tooth speed reducer is characterized in that the circumferential moving mechanism comprises a gear ring, an annular guide rail, an annular sliding block, a roller assembly and a gear driving assembly, wherein the annular guide rail and the gear ring are coaxially arranged with the oscillating tooth speed reducer, the annular sliding block is in sliding fit with the annular guide rail through the roller assembly, the gear driving assembly is arranged on the annular sliding block, an output gear of the gear driving assembly is meshed with the gear ring, and the annular sliding block is driven to move circumferentially along the annular guide rail.
8. The vibration testing device of the non-contact oscillating tooth speed reducer is characterized in that the roller assembly comprises a plurality of rollers which are symmetrically distributed on the upper side and the lower side of the annular guide rail, the gear driving assembly comprises an annular slide block driving motor, a gear shaft and a gear, the annular slide block driving motor is arranged on one side of the annular slide block, an output shaft of the annular slide block driving motor penetrates through the annular slide block and is coaxially connected with the gear shaft, and the gear is arranged on the gear shaft and meshed with the gear ring.
9. The vibration testing device of the non-contact oscillating tooth speed reducer is characterized in that the spring energy storage type constant force hammering mechanism comprises a frame, a linear guide rail module, a screw rod driving assembly, a spring energy storage assembly and a force hammer executing assembly, wherein the frame is arranged on the annular sliding block, the linear guide rail module is fixedly arranged on the front side of the frame along the hammering direction, the screw rod driving assembly is arranged on the frame along the hammering direction, the spring energy storage assembly is sleeved on a screw rod of the screw rod driving assembly, the force hammer executing assembly is in sliding fit with the linear guide rail module and is in transmission fit with the screw rod driving assembly, the elastic force of the spring energy storage assembly is adjustable, the spring energy storage assembly is compressed by the screw rod driving assembly to realize energy storage, and the force hammer executing assembly completes hammering after releasing.
10. The vibration testing device of the non-contact movable gear reducer is characterized in that the force hammer executing assembly comprises a split type screw rod sliding block, a fixed block, a force hammer and a force hammer connecting rod, wherein the split type screw rod sliding block comprises a shell, two split type sliding blocks, an elastic reset piece and a movable cam driving assembly, the two split type sliding blocks are arranged in the shell in a sliding mode, half threaded through holes are formed in opposite ends of the two split type sliding blocks respectively, the elastic reset piece is arranged between the two split type sliding blocks, the split type sliding blocks are unfolded to enable the threaded through holes to be separated when no external force exists, the movable cam driving assembly is arranged in the shell and matched with the split type sliding blocks, the two split type sliding blocks are driven to be combined to form complete threaded through holes to be meshed with the screw rod, the fixed block is arranged on the split type screw rod sliding block, and the force hammer is connected with the fixed block through the force hammer connecting rod.

Description

Vibration testing device of non-contact oscillating tooth speed reducer Technical Field The invention relates to the technical field of speed reducer testing, in particular to a vibration testing device of a non-contact oscillating tooth speed reducer. Background The movable tooth speed reducer is used as a novel transmission device, and is widely applied to the fields of engineering machinery, aerospace, intelligent manufacturing and the like by virtue of the advantages of large transmission ratio, compact structure, strong bearing capacity and the like. The vibration characteristics and the vibration transmission characteristics are core indexes for evaluating the transmission precision, the running stability and the service life, so that the accurate detection of the vibration characteristics is completed through a hammering impact excitation experiment. In the vibration test of the existing movable tooth speed reducer, an artificial swing power hammer is generally adopted to realize impact excitation, a Doppler laser vibration measurement technology is utilized to collect vibration signals, and the test mode has the technical defects that firstly, the relative position and angle of a Doppler laser vibration meter and the movable tooth speed reducer are required to be manually adjusted, manual operation deviation is easy to generate, the positioning of laser measuring points is inaccurate, the accuracy of vibration signal collection is affected, secondly, the exciting force and the hammering position of manual hammering are difficult to accurately control, obvious force value fluctuation exists in repeated hammering of the same measuring point, the repeatability and consistency of test data are poor, thirdly, the manual hammering can only realize excitation at a limited angle, the circumferential full-angle vibration characteristic detection of the movable tooth speed reducer cannot be completed, and the test coverage is insufficient. In order to improve hammering positioning accuracy, the prior art discloses a modal test hammering point positioning device as disclosed in patent document with publication number CN222964850U, and accurate positioning of hammering points is realized through cooperation of a laser positioning instrument, but the device still relies on manual operation, automatic hammering is not realized, controllability of hammering force is not solved yet, and lifting effect of positioning accuracy is limited. In order to realize the control of hammering force, the patent document with the publication number of CN205808658U discloses an air pressure driven hammer device, provides appointed air pressure through the air pump and drives the hammer head to beat, realizes the accurate control of hammering force, but the device needs to be fixed through the screw thread with the measured piece, has specific requirements to the structure of the measured piece, has poor adaptability to curved surfaces/special-shaped components without preset screw threads such as a movable tooth reducer, and needs to repeatedly detach fastening screw threads when changing hammering positions, and complex operation, low testing efficiency, and simultaneously the air pump also leads to complex overall structure and high maintenance cost of the device as a power source. To sum up, the existing oscillating tooth speed reducer vibration testing technology has the problems of large pose adjustment deviation, poor hammering force and position controllability, low automation degree, insufficient testing efficiency and accuracy and the like, and an integrated testing device integrating automatic pose adjustment, multi-angle fixed force hammering and non-contact vibration detection is needed to meet the requirement of accurate detection of oscillating tooth speed reducer vibration characteristics. Disclosure of Invention The vibration testing method aims at solving the problems of large pose adjustment deviation, poor hammering force and position controllability, low automation degree, insufficient testing efficiency and accuracy and the like in the existing vibration testing technology of the movable tooth speed reducer. The invention provides a vibration testing device of a non-contact oscillating tooth speed reducer, which realizes the accurate alignment of a vibration meter and the speed reducer through the cooperative adjustment of a double-multi-degree-of-freedom pose adjusting device, realizes the hammering excitation of automatic, multi-angle and constant exciting force by combining an annular circumferential moving mechanism and a spring energy storage type constant force hammering mechanism, completes the non-contact vibration detection by matching with a Doppler laser vibration measuring technology, and improves the accuracy, repeatability and testing efficiency of test data. The invention relates to a non-contact oscillating tooth speed reducer vibration testing device, which adopts the following technical sche