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CN-121977826-A - Dynamic torque fatigue test device for spline shaft and use method

CN121977826ACN 121977826 ACN121977826 ACN 121977826ACN-121977826-A

Abstract

The invention discloses a dynamic torque fatigue test device for a spline shaft, which comprises a supporting table, wherein a left torque loading assembly and a right rotating speed loading assembly are arranged on the upper portion of the supporting table along the same axis, a sample tool and test samples arranged in the sample tool are connected between the left torque loading assembly and the right rotating speed loading assembly, the sample tool is arranged on two sides of the top of the supporting table and comprises a bearing seat and a butt joint piece rotationally arranged in the bearing seat, one ends of the butt joint pieces on two sides are respectively in transmission connection with shaft output ends of the left torque loading assembly and the right rotating speed loading assembly, and the other ends of the butt joint pieces are fixedly connected with two ends of the spline shaft test samples, so that the spline shaft test samples are suspended and erected between the bearing seat assemblies on two sides. Compared with the prior art, the spline shaft dynamic torque fatigue test device and the use method thereof have the advantages that the installation and the operation are convenient, and the dynamic torque fatigue test device for simulating the dynamic working condition application is convenient.

Inventors

  • LIU XIAOPENG
  • WU XIZHU

Assignees

  • 三一重型装备有限公司

Dates

Publication Date
20260505
Application Date
20260327

Claims (7)

  1. 1. The dynamic torque fatigue test device for the spline shaft is characterized by comprising a supporting table, wherein a left torque loading assembly and a right rotating speed loading assembly are arranged on the upper part of the supporting table along the same axis; A sample tool and a test sample installed in the sample tool are connected between the left torque loading assembly and the right rotating speed loading assembly; Sample frock is laid and is supported bench top both sides, including bearing frame and rotation locate the butt joint piece in the bearing frame, both sides the one end of butt joint piece is connected with the axle output transmission of left side moment of torsion loading subassembly and right side rotational speed loading subassembly respectively, and the other end makes the unsettled frame of spline shaft test sample between the bearing frame subassembly of both sides with the both ends fixed connection of spline shaft test sample.
  2. 2. The dynamic torque fatigue test device for the spline shaft, as set forth in claim 1, is characterized in that the left torque loading assembly comprises a first speed reducer connecting flange and a left transmission shaft which are sequentially connected; The first speed reducer connecting flange is connected to a first driving source.
  3. 3. The dynamic torque fatigue test device for the spline shaft, as set forth in claim 2, is characterized in that the right side rotational speed loading assembly comprises a second speed reducer connecting flange plate and a right transmission shaft which are connected in sequence; the second speed reducer connecting flange is connected to a second driving source.
  4. 4. The dynamic torque fatigue test device for the spline shaft according to claim 3, wherein the butt joint part comprises a butt joint flange and a deep groove ball bearing sleeved outside the butt joint flange; The bearing seat comprises a lower semicircular bearing seat connected with the supporting table and an upper semicircular bearing seat connected with the top wall of the lower semicircular bearing seat; And a bearing groove for accommodating the deep groove ball bearing is formed between the lower semicircular bearing seat and the upper semicircular bearing seat.
  5. 5. The dynamic torque fatigue test device for the spline shaft according to claim 4, wherein one end of the butt joint piece is provided with a spline shaft, the other end of the butt joint piece is provided with a butt joint flange, and the spline shaft test sample piece is fixedly connected with the butt joint flange; the left transmission shaft and the right transmission shaft have the same structure, and the two ends of the left transmission shaft and the right transmission shaft are connected with universal joints.
  6. 6. The dynamic torque fatigue test device for the spline shaft according to claim 4, wherein the top of the supporting table is provided with a plurality of groups of fastening holes, and the base of the lower semicircular bearing seat is connected with the fastening holes through fasteners.
  7. 7. A method for using the dynamic torque fatigue test device for the spline shaft, which is used for the device of any one of claims 1 to 6, and is characterized by comprising the following steps: s1, adjusting and fixing the spacing between lower semicircular bearing seats at two sides on a supporting table according to the length of a spline shaft test sample piece; s2, respectively connecting two ends of a spline shaft test sample piece with a butt joint piece, and fastening an upper semicircular bearing seat to lock a deep groove ball bearing; s3, connecting the left transmission shaft and the right transmission shaft with the spline shaft through universal joints respectively, and calibrating the overall coaxiality; s4, double-drive independent control loading, starting a first driving source and a second driving source, and simulating actual working conditions; And S5, acquiring torque and rotation speed data in real time in the loading process, and controlling to stop the test when abnormal falling of the torque value, unstable rotation speed or preset cycle times are monitored.

Description

Dynamic torque fatigue test device for spline shaft and use method Technical Field The invention relates to the technical field of mechanical performance testing, in particular to a dynamic torque fatigue test device for a spline shaft and a use method thereof. Background The spline shaft is used as a core component for power transmission and plays a key role in transmitting input torque to a target execution part, and the torque fatigue performance of the spline shaft directly influences the reliability and the service life of the whole transmission system. In particular, in the field of heavy machinery such as mine cars, in the actual use process of a customer mining area, extreme working conditions such as instantaneous large torque, high-frequency start and stop and the like provide higher requirements on the fatigue resistance of the spline shaft. Once the spline teeth or the spline shaft fail due to fatigue and other reasons, the whole vehicle power system is interrupted, and serious potential safety hazards are caused. Therefore, through a dynamic torsional fatigue test in a laboratory, it is very necessary to verify the mechanical properties of the spline shaft under extreme working conditions. The existing spline shaft fatigue test mainly comprises the following schemes: Firstly, single motor driving loading is carried out, and torque loading is carried out on a spline shaft by means of forward and reverse rotation of a motor; Secondly, the hydraulic system is loaded, and high torque input can be realized, but the response speed of the hydraulic system is slow, so that the high-frequency dynamic working condition is difficult to simulate; and thirdly, the two sides of the spline shaft are loaded together by using double motors, but the control strategy is single. Therefore, a set of test device for simplifying installation and debugging and realizing dynamic torque loading is needed to be designed. Disclosure of Invention The technical problem to be solved by the invention is to overcome the technical defects, and provide the spline shaft dynamic torque fatigue test device which is convenient to install and operate and convenient to simulate dynamic working condition application and the use method. In order to solve the technical problems, the technical scheme provided by the invention is that the dynamic torque fatigue test device for the spline shaft is characterized by comprising a supporting table, wherein a left torque loading assembly and a right rotating speed loading assembly are arranged at the upper part of the supporting table along the same axis; A sample tool and a test sample installed in the sample tool are connected between the left torque loading assembly and the right rotating speed loading assembly; Sample frock is laid and is supported bench top both sides, including bearing frame and rotation locate the butt joint piece in the bearing frame, both sides the one end of butt joint piece is connected with the axle output transmission of left side moment of torsion loading subassembly and right side rotational speed loading subassembly respectively, and the other end makes the unsettled frame of spline shaft test sample between the bearing frame subassembly of both sides with the both ends fixed connection of spline shaft test sample. Preferably, the left torque loading assembly comprises a first speed reducer connecting flange plate and a left transmission shaft which are sequentially connected; The first speed reducer connecting flange is connected to a first driving source. Preferably, the right rotating speed loading assembly comprises a second speed reducer connecting flange plate and a right transmission shaft which are sequentially connected; the second speed reducer connecting flange is connected to a second driving source. Preferably, the butt joint part comprises a butt joint flange and a deep groove ball bearing sleeved outside the butt joint part; The bearing seat comprises a lower semicircular bearing seat connected with the supporting table and an upper semicircular bearing seat connected with the top wall of the lower semicircular bearing seat; And a bearing groove for accommodating the deep groove ball bearing is formed between the lower semicircular bearing seat and the upper semicircular bearing seat. Preferably, a spline shaft is formed at one end of the butt joint piece, a butt joint flange is formed at the other end of the butt joint piece, and the spline shaft test sample piece is fixedly connected with the butt joint flange; the left transmission shaft and the right transmission shaft have the same structure, and the two ends of the left transmission shaft and the right transmission shaft are connected with universal joints. Preferably, a plurality of groups of fastening holes are formed at the top of the supporting table, and the base of the lower semicircular bearing seat is connected with the fastening holes through fasteners. The invention also discloses a