Double-support active unbalance loading rolling fatigue testing machine

Abstract

The invention discloses a double-support active unbalance loading rolling fatigue testing machine, and particularly relates to the technical field of material testing. Comprising a driving motor, a driven motor, a dynamic torsion sensor, a driving spindle box, a driven spindle box, an accompanying sample connecting seat, a loading strut beam, an accompanying sample seat, a main sample seat, a loading servo motor, a reduction gearbox, a loading lead screw, a loading cross beam, a loading force sensor, a torsion spindle seat, a torsion transmission shaft, a torsion connecting flange plate, a torsion lever and a torsion loading weight, and the right side of the driving motor is fixedly connected with a main sample roller through a flexible coupling. According to the double-support driving unbalance-loading rolling fatigue testing machine disclosed by the invention, by arranging double-side support structures of the main sample seat and the auxiliary sample seat and matching the main sample seat and the auxiliary sample seat with flexible couplings between the main sample seat and the auxiliary sample seat as well as the main sample roller and the driven roller for transmitting power, the problem of non-uniform loading stress of a cantilever beam is solved; and the vibration effect of the driven sample is effectively improved, so that the accuracy and stability of the test are improved.

Description

Technical Field

[0001] The invention relates to the technical field of material testing, and in particular to a double-support active eccentric load rolling fatigue testing machine. Background Art

[0002] Rolling fatigue testing machines are mainly used to evaluate the fatigue performance of materials or components under rolling contact conditions, especially to simulate actual applications, such as the fatigue life of mechanical parts such as bearings and gears. This type of testing machine applies repeated stress loading to determine whether the sample will fail after a certain number of cycles. Currently, most common rolling fatigue testing machines are supported by cantilever beams, which may produce micro-deformations when using large loads, thereby causing changes in the rolling friction mechanism and affecting the test results. Common rolling fatigue testing machines mostly use the driven shaft as a whole to press down and use a balance block to balance its own weight, which increases the uncertainty of load errors and rolling friction running-in vibration stages.

[0003] Chinese patent publication number CN217059666U discloses a double-support balanced force structure for a rolling fatigue test specimen, including a bottom plate and an experimental specimen holding mechanism centrally arranged at the top of the bottom plate, a gravity applying mechanism fixedly arranged at the top of the bottom plate, and the gravity applying mechanism abuts against the experimental specimen, the top of the holding mechanism, the gravity applying mechanism includes two support columns symmetrically arranged at both sides of the bottom end of the bottom plate, a force applying crossbeam is slidably arranged on the outer edge surfaces of the two support columns, a force applying crossbeam is fixedly arranged at the center of the bottom end of the force applying crossbeam, and a force applying sensor abutting against the experimental specimen holding mechanism is fixedly arranged, the experimental specimen holding mechanism includes a lower specimen chuck and a support centrally fixedly installed at the top of the bottom plate, the double-support balanced force structure for the rolling fatigue test specimen can ensure accurate and reliable force, greatly improve the reliability of such rolling fatigue tests and the stability of data, can better carry out experimental research, and has strong practicality;

[0004] However, the above device still has the following defects: although the above device can adjust the cutting blade, the flying chips generated during cutting cannot be processed. If too much chips are accumulated, it is easy to affect the cutting effect. Summary of the invention

[0005] The main purpose of the present invention is to provide a double-support active eccentric load rolling fatigue testing machine, which can effectively solve the problem of being unable to handle flying chips.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A double-support active eccentric load rolling fatigue testing machine, including an active motor, a driven motor, a dynamic torque sensor, an active spindle box, a driven spindle box, a companion sample connection seat, a loading support beam, a companion sample seat, a main sample seat, a loading private service motor, a reduction box, a loading screw, a loading crossbeam, a loading force sensor, a torque spindle seat, a torque transmission shaft, a torque connection flange, a torque lever, and a torque loading weight. The right side of the active motor is fixedly connected to a main sample roller through a flexible coupling, and the left side of the driven motor is connected to a driven roller through a flexible coupling. The main sample roller and the driven roller are arranged opposite to each other, and the speeds of the motors on both sides can be adjusted independently to form different rolling sliding friction proportional coefficients between the active roller and the driven companion roller.

[0008] Preferably, the companion sample connecting seat is arranged above the main sample roller, and is fixedly connected to one end of the loading support beam by bolts, and the other end of the loading support beam is fixedly connected to the loading cross beam by bolts.

[0009] Preferably, the loading private service motor is arranged below the device, the output end of the private service motor is fixedly connected to the input end of the reduction box through a coupling, the output end of the reduction box is fixedly connected to one end of the loading screw through a coupling, the other end of the loading screw is connected to the loading beam through a thread, and the loading force sensor is fixedly installed on the loading beam by bolts.

[0010] Preferably, the torque main shaft seat is arranged at the lower middle part of the device, the torque main shaft seat is fixedly connected to one end of the torque transmission shaft by a key connection, the other end of the torque transmission shaft is fixedly connected to the torque connecting flange by bolts, one end of the torque lever is connected to the torque connecting flange by a hinge, and the other end of the torque lever is connected to the torque loading weight by a hook.

[0011] Preferably, the main sample seat and the accompanying sample seat are respectively arranged on both sides of the main sample roller and the driven roller, the bottoms of the main sample seat and the accompanying sample seat are fixedly connected to the device base by welding, and flexible couplings are used to transmit power between the main sample seat and the accompanying sample seat and the main sample roller and the driven roller.

[0012] Preferably, the loading structure adopts a portal structure, and the loading support beam, loading cross beam and device base constitute a portal frame. The sample is placed in the portal frame and a top-down portal loading structure is adopted. The loading force is transmitted to the sample through the loading cross beam and loading support beam to avoid angle loading and machine head deadweight errors. The upper pressure electronic servo loading technology is also adopted, and an adjustable upper sample holding structure is adopted. When the sample is subjected to positive pressure, a certain deflection torque can be actively applied to simulate the actual stress condition of the material.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting up the double-sided support structure of the main sample seat and the accompanying sample seat and the flexible coupling between them and the main sample roller and the driven roller to transmit power, the problem of uneven loading of the cantilever beam is solved, and the vibration effect of the driven sample is effectively improved, thereby improving the accuracy and stability of the test.

[0015] 2. By setting up the loading structure of the portal structure and the coordination of the top-down portal loading structure, the diameter adjustment of the specimen is made more convenient while effectively avoiding the angle loading and the deadweight error of the machine head, providing more accurate loading conditions and more convenient operation methods for the test.

[0016] 3. By setting up the upward pressure electronic servo loading technology and the adjustable upper sample holding structure, the effect of actively applying a certain deflection torque when the sample is subjected to positive pressure can be achieved, which can more realistically simulate the actual stress conditions of the material and provide data and results that are more in line with the actual situation for material performance testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall structure from another perspective of the present invention.

[0019] In the figure: 1. Active motor; 2. Driven motor; 3. Dynamic torque sensor; 4. Active spindle box; 5. Driven spindle box; 6. Accompanying style connecting seat; 7. Loading support beam; 8. Accompanying style seat; 9. Main style seat; 10. Loading private service motor; 11. Reducer; 12. Loading screw; 13. Loading beam; 14. Loading force sensor; 15. Torque spindle seat; 16. Torque transmission shaft; 17. Torque connecting flange; 18. Torque lever; 19. Torque loading weight. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0021] For example, see Figure 1 and Figure 2As shown, a double-support active eccentric load rolling fatigue testing machine includes an active motor 1, a driven motor 2, a dynamic torque sensor 3, an active spindle box 4, a driven spindle box 5, a companion sample connecting seat 6, a loading support beam 7, a companion sample seat 8, a main sample seat 9, a loading private service motor 10, a reduction box 11, a loading screw 12, a loading beam 13, a loading force sensor 14, a torque spindle seat 15, a torque transmission shaft 16, a torque connection flange 17, a torque lever 18, and a torque loading weight 19. The right side of the active motor 1 is fixedly connected to a main sample roller through a flexible coupling, and the left side of the driven motor 2 is connected to a driven roller through a flexible coupling. The main sample roller and the driven roller are arranged opposite to each other, and the speeds of the motors on both sides can be adjusted independently to form different rolling sliding friction proportional coefficients between the active roller and the driven companion roller.

[0022] First, an active motor 1 is used to drive the main sample roller, which is connected to the active spindle box 4 through a flexible coupling, so that a relative rolling motion is generated between the main sample roller and the driven roller; then, the driven motor 2 connects the driven roller to the driven spindle box 5 through a flexible coupling, and the rotation speed of the driven motor 2 is adjusted to control the rolling sliding friction proportional coefficient between the main sample roller and the driven roller. In addition, a loading system composed of a loading force sensor 14, a loading beam 13, a loading screw 12, a reduction box 11, and a loading private service motor 10 applies different torque loads to the sample through a torque transmission system including a torque spindle seat 15, a torque connection flange 17, a torsion lever 18, a torsion loading weight 19 and other components, thereby completing the double-support active eccentric load rolling fatigue test process;

[0023] Furthermore, by cooperating with the active motor 1 and the driven motor 2, and connecting the main sample roller and the driven roller through a flexible coupling, precise adjustment of the rolling sliding friction ratio between the two is achieved. At the same time, through the synergistic effect of the loading force sensor 14, the loading beam 13, the loading screw 12, the reduction gear box 11 and the loading private service motor 10, in conjunction with the torque transmission system, different torque loads are applied to the sample.

[0024] See also Figure 1 and Figure 2 As shown, the companion sample connecting seat 6 is arranged above the main sample roller, and is fixedly connected to one end of the loading support beam 7 by bolts, and the other end of the loading support beam 7 is fixedly connected to the loading cross beam 13 by bolts.

[0025] Furthermore, the companion specimen connection seat 6 is arranged above the main specimen roller, and is fixedly connected to one end of the loading support beam 7 by bolts; then, the other end of the loading support beam 7 is fixedly connected to the loading crossbeam 13 by bolts to form a stable loading support structure. Through the loading crossbeam 13, the loading support beam 7 can be adjusted in the up and down directions to achieve the application of positive contact load to the specimen, and cooperate with the control of the loading screw 12 and the loading private service motor 10 to achieve precise loading and torque adjustment of the specimen to simulate rolling fatigue tests under different working conditions;

[0026] Furthermore, by cooperating with the specimen connecting seat 6 and the loading support beam 7, and then by fixedly connecting the loading support beam 7 and the loading cross beam 13, stable support and precise adjustment of the specimen are achieved. This structure can flexibly adjust the contact load and torque of the specimen during the test to ensure the repeatability and accuracy of the test, while improving the stability of the loading system and the convenience of the test operation, thereby effectively simulating the rolling fatigue behavior under different working conditions.

[0027] See also Figure 1 and Figure 2 As shown, the loading private service motor 10 is arranged below the device, the output end of the private service motor 10 is fixedly connected to the input end of the reduction box 11 through a coupling, the output end of the reduction box 11 is fixedly connected to one end of the loading screw 12 through a coupling, the other end of the loading screw 12 is connected to the loading beam 13 through a thread, and the loading force sensor 14 is fixedly installed on the loading beam 13 by bolts.

[0028] First, the loading motor 10 is set under the device, and its output end is fixedly connected to the input end of the reduction box 11 through a coupling; then, the output end of the reduction box 11 is fixedly connected to one end of the loading screw 12 through a coupling, and the other end of the loading screw 12 is connected to the loading beam 13 through a thread, and then the loading force sensor 14 is fixedly installed on the loading beam 13 by bolts to monitor the force value generated during the loading process in real time. This structure allows the force and displacement during the loading process to be accurately controlled, and the loading beam 13 can be accurately adjusted by rotating the loading screw 12, thereby providing a stable and adjustable loading force for the specimen to meet the needs of the rolling fatigue test.

[0029] See also Figure 1 and Figure 2 As shown, the torque main shaft seat 15 is arranged at the lower middle part of the device, the torque main shaft seat 15 is fixedly connected to one end of the torque transmission shaft 16 by a key connection, the other end of the torque transmission shaft 16 is fixedly connected to the torque connection flange 17 by a bolt, one end of the torque lever 18 is connected to the torque connection flange 17 by a hinge, and the other end of the torque lever 18 is connected to the torque loading weight 19 by a hook;

[0030] Furthermore, by cooperating the loading motor 10 with the reduction gearbox 11 and the loading screw 12, precise adjustment and transmission of the loading force are achieved. At the same time, through the threaded connection between the loading screw 12 and the loading beam 13, and the real-time monitoring of the loading force sensor 14, precise control and monitoring of the force value during the loading process are ensured, so that the specimen can withstand a stable and adjustable load in the rolling fatigue test, thereby improving the accuracy, reliability and repeatability of the test.

[0031] like Figure 1 and Figure 2 As shown, the main sample seat 9 and the accompanying sample seat 8 are respectively arranged on both sides of the main sample roller and the driven roller, the bottom of the main sample seat 9 and the accompanying sample seat 8 are fixedly connected to the device base by welding, and the main sample seat 9 and the accompanying sample seat 8 are used to transmit power to the main sample roller and the driven roller through a flexible coupling.

[0032] Furthermore, the main sample seat 9 and the accompanying sample seat 8 are respectively arranged on both sides of the main sample roller and the driven roller, and the bottoms thereof are fixedly connected to the base of the device by welding; then, the main sample seat 9 and the main sample roller, and the accompanying sample seat 8 and the driven roller are used to transmit power through a flexible coupling, thereby ensuring the stable operation and relative movement of the main sample roller and the driven roller, so that the power can be effectively transmitted to the roller system, and a flexible connection can be maintained during the load-bearing process, thereby avoiding rigid damage to the system and improving the stability and durability of the equipment;

[0033] Secondly, by cooperating with the main sample seat 9, the auxiliary sample seat 8 and the flexible coupling, stable power transmission between the main sample roller and the driven roller is achieved, ensuring effective power transmission while maintaining the flexible connection of the system, reducing rigid damage and excessive wear, thereby improving the operating stability and service life of the equipment.

[0034] For further information, please refer to Figure 1 and Figure 2 As shown, the loading structure adopts a portal structure. The loading support beam 7, the loading cross beam 13 and the device base constitute a portal frame. The sample is placed in the portal frame and a top-down portal loading structure is adopted. The loading force is transmitted to the sample through the loading cross beam 13 and the loading support beam 7 to avoid angle loading and head deadweight errors. The upper pressure electronic servo loading technology is also adopted, and an adjustable upper sample holding structure is adopted. When the sample is subjected to positive pressure, a certain deflection torque can be actively applied to simulate the actual stress condition of the material.

[0035] Furthermore, the loading structure adopts a portal structure, and the loading support beam 7 and the loading cross beam 13 together with the device base form a portal frame, and the sample is placed inside the frame, and a top-down portal loading method is adopted; then, the loading force is effectively transmitted to the sample through the loading cross beam 13 and the loading support beam 7 to avoid errors caused by angle loading and the deadweight of the machine head. At the same time, the upper pressure electronic servo loading technology and the adjustable upper sample holding structure are adopted, so that the sample can actively apply a certain deflection torque while being subjected to positive pressure, thereby simulating the stress state of the material under actual working conditions;

[0036] Through the coordination of the portal structure and the upward pressure electronic servo loading technology, the specimen can actively apply a certain deflection torque while being subjected to positive pressure, simulating the actual stress condition of the material, effectively avoiding angle loading and machine head deadweight errors, improving loading accuracy and stability, and ensuring the true reproduction of the specimen stress conditions during the test, thereby improving the accuracy and reliability of the test results.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A double-support active eccentric load rolling fatigue testing machine, comprising an active motor (1), a driven motor (2), a dynamic torque sensor (3), an active spindle box (4), a driven spindle box (5), a companion model connection seat (6), a loading support beam (7), a companion model seat (8), a main model seat (9), a loading private service motor (10), a reduction box (11), a loading screw (12), a loading beam (13), a loading force sensor (14), a torque spindle seat (15), a torque transmission shaft (16), a torque connection flange (17), a torque lever (18), and a torque loading weight (19), characterized in that: The right side of the active motor (1) is fixedly connected to a main sample roller via a flexible coupling, and the left side of the driven motor (2) is connected to a driven roller via a flexible coupling. The main sample roller and the driven roller are arranged opposite to each other, and the speeds of the motors on both sides can be adjusted autonomously to form different rolling sliding friction proportional coefficients between the active roller and the driven sample roller.

2. The test device according to claim 1, characterized in that: The accompanying sample connection seat (6) is arranged above the main sample roller and is fixedly connected to one end of the loading support beam (7) by means of bolts, and the other end of the loading support beam (7) is fixedly connected to the loading cross beam (13) by means of bolts.

3. The test device according to claim 1, characterized in that: The loading servo motor (10) is arranged below the device, the output end of the servo motor (10) is fixedly connected to the input end of the reduction box (11) through a coupling, the output end of the reduction box (11) is fixedly connected to one end of the loading lead screw (12) through a coupling, the other end of the loading lead screw (12) is connected to the loading crossbeam (13) through a thread, and the loading force sensor (14) is fixedly installed on the loading crossbeam (13) through a bolt.

4. The test device according to claim 1, characterized in that: The torque main shaft seat (15) is arranged at the lower middle part of the device, the torque main shaft seat (15) is fixedly connected to one end of the torque transmission shaft (16) by a key connection, the other end of the torque transmission shaft (16) is fixedly connected to the torque connection flange (17) by a bolt, one end of the torque lever (18) is connected to the torque connection flange (17) by a hinge, and the other end of the torque lever (18) is connected to the torque loading weight (19) by a hook.

5. The test device according to claim 1, characterized in that: The main sample seat (9) and the accompanying sample seat (8) are respectively arranged on both sides of the main sample roller and the driven roller. The bottoms of the main sample seat (9) and the accompanying sample seat (8) are fixedly connected to the device base by welding. Flexible couplings are used to transmit power between the main sample seat (9) and the accompanying sample seat (8) and the main sample roller and the driven roller.

6. The test device according to claim 1, characterized in that: The loading structure adopts a portal structure. The loading support beam (7), the loading cross beam (13) and the device base form a portal frame. The sample is placed in the portal frame and adopts a top-down portal loading structure. The loading force is transmitted to the sample through the loading cross beam (13) and the loading support beam (7) to avoid angle loading and head deadweight errors. The upper pressure electronic servo loading technology is also adopted, and an adjustable upper sample holding structure is adopted. When the sample is subjected to positive pressure, a certain deflection torque can be actively applied to simulate the actual stress condition of the material.

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