Torsion fatigue testing machine for diesel steel piston of different specifications

Abstract

The utility model relates to test device technical field, and disclose the torsional fatigue testing machine of adaptation different specification diesel steel piston. Including work table, the work table top surface fixedly connected with the body, the body front surface detachably installed have temperature control screen, the body fixedly connected with high temperature oven in the middle, a plurality of groups infrared heating tubes are detachably installed to high temperature oven side wall, temperature sensor is detachably installed to high temperature oven inner wall back, utilize infrared heating tube, temperature sensor and temperature control screen mutual cooperation, realize the dynamic regulation of high temperature oven temperature, maintain diesel steel piston temperature stability, through the high temperature condition that the replica piston faces when working, let the test be more close to the compound working condition that piston is in engine and has to bear torsional load and has to bear high temperature, to more accurate evaluation its actual service life and anti failure ability, provide reliable data support under real working condition for the material selection optimization, structure design improvement of diesel steel piston.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a torsional fatigue testing machine adapted to diesel steel pistons of different specifications. Background Technology

[0002] As a core component of diesel engines, the diesel steel piston functions to withstand the effects of high-temperature, high-pressure combustion gases and convert combustion energy into mechanical torque. This directly impacts the engine's power output and operational reliability. Torque testing of diesel steel pistons is crucial, as it assesses their torque transmission capability, fatigue life, and structural integrity under actual operating conditions, providing key data support for product design and material optimization. However, existing torque testing machines have significant limitations: they cannot replicate the high-temperature operating environment of the piston inside the engine, resulting in test conditions that deviate significantly from real-world conditions. Consequently, the test results cannot accurately reflect the piston's mechanical properties, thermal deformation behavior, and friction and wear characteristics at high temperatures. Therefore, there is an urgent need to develop a torque fatigue testing machine integrating a high-temperature heating system. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a torsional fatigue testing machine adapted to diesel steel pistons of different specifications. It has the advantages of simulating the actual working temperature of the piston and adapting to diesel steel pistons of different specifications, thus solving the aforementioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: it includes a workbench, the top surface of which is fixedly connected to a body, a temperature control screen is detachably installed on the front of the body, a high-temperature oven is fixedly connected to the center of the body, a channel is opened on the side wall of the high-temperature oven, several sets of infrared heating tubes are detachably installed on the top and bottom of the side wall of the high-temperature oven, and a temperature sensor is detachably installed on the back of the inner wall of the high-temperature oven.

[0005] As a preferred embodiment of this utility model, four sets of machine feet are fixedly connected to the bottom surface of the workbench, a first groove is provided on the top surface of the workbench, a rotating shaft is rotatably connected to the bottom surface of the first groove, the rotating shaft passes through the bottom surface of the workbench and is fixedly connected to a first handwheel, two parallel slide rails are provided on the bottom surface of the first groove, racks are slidably connected to the inner walls of the two sets of slide rails, the two sets of racks are connected by a gear, and a movable block is fixedly connected to the end of the two sets of racks away from the gear.

[0006] As a preferred embodiment of this utility model, brackets are slidably connected to both sides of the body. The bottom of the brackets is fixedly connected to the top of the movable block. A drive shaft is rotatably connected to the bracket near the temperature control screen. The drive shaft passes through the bracket and is rotatably connected to a servo motor. A first turntable is fixedly connected to the end of the drive shaft away from the servo motor. A driven shaft is rotatably connected to the bracket away from the temperature control screen. A second turntable is fixedly connected to the end of the driven shaft away from the bracket. A camera is detachably mounted on the surface of the second turntable. An auxiliary block is fixedly connected to the opposite surface of the first turntable and the second turntable. A second groove is formed on the opposite surface of the two sets of auxiliary blocks. The two inner walls of the second groove are rotatably connected by a bidirectional screw. The bidirectional screw extends out of the second groove and is fixedly connected to a second handwheel. Clamping arms are slidably connected to both ends of the second groove. The clamping arms are threadedly connected to the bidirectional screw.

[0007] As a preferred embodiment of this invention, the high-temperature oven has a sliding door on its front.

[0008] As a preferred embodiment of this invention, the channel diameter is greater than the length of the bidirectional screw.

[0009] As a preferred embodiment of this utility model, the temperature sensor is electrically connected to the temperature control screen, and the temperature control screen is electrically connected to the infrared heating tube.

[0010] Compared with the prior art, this utility model provides a torsional fatigue testing machine that is adaptable to diesel steel pistons of different specifications, and has the following beneficial effects: 1. This utility model designs a high-temperature oven and utilizes infrared heating tubes, temperature sensors, and a temperature control screen to dynamically adjust the temperature of the high-temperature oven, maintaining the temperature stability of the diesel steel piston. By replicating the high-temperature conditions faced by the piston during operation, the test more closely reflects the combined working conditions of the piston in the engine, which must withstand torsional loads and high temperatures. This allows for a more accurate assessment of its actual service life and failure resistance, providing reliable data support under real-world conditions for optimizing the material selection and improving the structural design of diesel steel pistons.

[0011] 2. This utility model, by designing a movable clamping arm, can reliably clamp diesel steel pistons by adjusting the horizontal spacing and clamping force of the clamping arm, adapting to diesel steel pistons of different specifications, significantly improving the versatility and production efficiency of the equipment, reducing the need for frequent tooling or special fixture changes due to differences in workpiece size, thus saving costs and shortening production preparation time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to this utility model; Figure 2 This is a cross-sectional view of the torsional fatigue testing machine for diesel steel pistons of different specifications according to this utility model; Figure 3 This is a schematic diagram of the high-temperature oven structure of the torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to this utility model; Figure 4 This is a schematic diagram of the first groove structure of the torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to this utility model; Figure 5 This is a schematic diagram of the first turntable structure of the torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to this utility model; Figure 6 This is a schematic diagram of the second turntable structure of the torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to this utility model.

[0013] The components include: 1. Workbench; 101. First groove; 102. Rotary shaft; 103. First handwheel; 104. Slide rail; 105. Rack; 106. Gear; 107. Movable block; 2. Machine body; 3. Temperature control screen; 4. High-temperature oven; 5. Channel; 6. Infrared heating tube; 7. Temperature sensor; 8. Machine feet; 9. Bracket; 10. Drive shaft; 11. Servo motor; 12. First turntable; 13. Driven shaft; 14. Second turntable; 15. Camera; 16. Auxiliary block; 17. Second groove; 18. Bidirectional screw; 19. Second handwheel; 20. Clamping arm; 21. Sliding door. Detailed Implementation

[0014] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0015] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Please see Figure 1-6 The system includes a workbench 1, with a body 2 fixedly connected to the top surface of the workbench 1. A temperature control screen 3 is detachably installed on the front of the body 2. A high-temperature oven 4 is fixedly connected to the center of the body 2. The temperature control screen 3 serves as a human-machine interface, displaying the temperature and heating status inside the high-temperature oven 4 in real time. Temperature control parameters can be manually modified. The high-temperature oven 4 provides a heating environment for the diesel steel piston, simulating its thermal load state in a diesel engine. A sliding door 21 is provided on the front of the high-temperature oven 4, which provides operating space for clamping the diesel steel piston. The side walls of the high-temperature oven 4 have... Channel 5, with a diameter larger than the length of the bidirectional screw 18, allows the clamping arm 20 to freely enter and exit the high-temperature oven 4. Several sets of infrared heating tubes 6 are detachably installed on the top and bottom of the side walls of the high-temperature oven 4. The infrared heating tubes 6 directly irradiate the key parts of the diesel steel piston, transferring heat through radiation for rapid heating. A temperature sensor 7 is detachably installed on the back of the inner wall of the high-temperature oven. The temperature sensor 7 is electrically connected to the temperature control screen 3, collecting the temperature of the diesel steel piston in real time and converting the physical temperature into an electrical signal, which is then fed back to the temperature control screen 3. The temperature control screen 3 is electrically connected to the infrared heating tube 6. The temperature control screen 3 accurately compares and analyzes the actual temperature value received by the temperature sensor 7 with the user-preset temperature threshold. If the actual temperature is lower than the preset threshold, the temperature control screen 3 will immediately increase the input power of the infrared heating tube 6 through power execution components such as solid-state relays and thyristors to increase its heating intensity and raise the temperature. If the actual temperature is higher than the preset threshold, the temperature control screen 3 will reduce the input power of the infrared heating tube 6 through power execution components to reduce its heating intensity, thereby achieving dynamic adjustment of the temperature of the infrared heating tube 6 and maintaining the temperature stability of the diesel steel piston. By replicating the high-temperature conditions faced by the piston during operation, the test is made more closely resemble the combined working conditions of the piston in the engine, which must withstand torsional loads and high temperatures. This allows for a more accurate assessment of its actual service life and failure resistance, providing reliable data support under real working conditions for the material selection optimization and structural design improvement of the diesel steel piston. Ultimately, this ensures that the mass-produced piston has better reliability and durability after installation, reduces the risk of installation failure caused by distortion of the test environment, and lowers the overall maintenance cost and safety hazards of the engine.

[0018] Specifically, four sets of machine feet 8 are fixedly connected to the bottom surface of the workbench, and a first groove 101 is opened on the top surface of the workbench. A rotating shaft 102 is rotatably connected to the bottom surface of the first groove 101. The rotating shaft 102 passes through the bottom surface of the workbench 1 and is fixedly connected to a first handwheel 103. Two parallel slide rails 104 are opened on the bottom surface of the first groove 101. The inner walls of the two sets of slide rails 104 are slidably connected to racks 105. The two sets of racks 105 are meshed and connected by a gear 106. The ends of the two sets of racks 105 away from the gear 106 are fixedly connected to movable blocks 107. When the first handwheel 103 is rotated, the rotating shaft 102 drives the gear 106 to rotate synchronously, thereby driving the two racks 105 to move in opposite directions, so that the two movable blocks 107 move closer to each other, thereby realizing the adjustment of the clamping arm 20 in the horizontal direction to adapt to different specifications of diesel steel pistons.

[0019] Specifically, brackets 9 are slidably connected to both sides of the body 2. The bottom of the brackets 9 is fixedly connected to the top of the movable block 107. A drive shaft 10 is rotatably connected to the bracket 9 near the temperature control screen 3. The drive shaft 10 passes through the bracket 9 and is rotatably connected to a servo motor 11, which provides power to the drive shaft 10. A first turntable 12 is fixedly connected to the end of the drive shaft 10 away from the servo motor 11. A driven shaft 13 is rotatably connected to the bracket 9 away from the temperature control screen 3. A second turntable 14 is fixedly connected to the end of the driven shaft 13 away from the bracket 9. The surface of the second turntable 14... A camera 15 is detachably mounted. Auxiliary blocks 16 are fixedly connected to the opposing surfaces of the first turntable 12 and the second turntable 14. Second grooves 17 are formed on the opposing surfaces of the two sets of auxiliary blocks 16. The two inner walls of the second groove 17 are rotatably connected by a bidirectional screw 18. The bidirectional screw 18 extends out of the second groove 17 and is fixedly connected to a second handwheel 19. Clamping arms 20 are slidably connected to both ends of the second groove 17. The clamping arms 20 are threadedly connected to the bidirectional screw 18. When the second handwheel 19 is rotated, the bidirectional screw 18 rotates, driving the clamping arms 20 on both sides to move towards each other, achieving clamping. After the servo motor 11 is started, the drive shaft 10 drives the first turntable 12 to rotate, thereby transmitting torque through the clamping arms 20 to achieve torque loading.

[0020] In use, the horizontal distance and clamping force of the clamping arms 20 are adjusted by rotating the first handwheel 103 and the second handwheel 19, thereby reliably clamping the diesel steel piston. Then, the infrared heating tube 6 is turned on, which heats the high-temperature oven 4 through radiative heat transfer. The temperature sensor 7 monitors the temperature of the diesel steel piston in real time and converts the physical temperature into an electrical signal, which is transmitted to the temperature control screen 3. The temperature control screen 3 accurately compares the received actual temperature value with the user-preset temperature threshold, and dynamically adjusts the input power of the infrared heating tube 6 through power actuators such as solid-state relays and silicon controlled rectifiers, achieving closed-loop control of the heating temperature to ensure that the temperature of the diesel steel piston remains stable. The servo motor 11 is then started, and the drive shaft 10 rotates the clamping arms 20 to transmit torque, realizing the torque loading function.

[0021] The infrared heating tube 6 used in this invention is the Heraeus NOWOTEC8221 model, which emits short-wave infrared radiation, resulting in extremely rapid heating, concentrated energy, strong penetration, and a surface temperature that can reach up to 2200℃. The temperature sensor 7 used in this invention is the OMEGA KMQSS-125U-6 model, with a side temperature range of -200℃ to +1250℃, fully covering the heat treatment temperature of diesel steel pistons. The temperature control screen 3 used in this invention is the Omron E5CC-QUX series digital temperature controller, featuring a dual four-digit LED display and supporting SSR drive output and SCR trigger output options.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsional fatigue testing machine adaptable to diesel steel pistons of different specifications, comprising a worktable (1), characterized in that: The workbench (1) is fixedly connected to the top surface of the body (2). A temperature control screen (3) is detachably installed on the front of the body (2). A high-temperature oven (4) is fixedly connected in the center of the body (2). A channel (5) is opened on the side wall of the high-temperature oven (4). Several sets of infrared heating tubes (6) are detachably installed on the top and bottom of the side wall of the high-temperature oven (4). A temperature sensor (7) is detachably installed on the back of the inner wall of the high-temperature oven.

2. The torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to claim 1, characterized in that: The bottom surface of the workbench is fixedly connected with four sets of machine feet (8), and the top surface of the workbench is provided with a first groove (101). The bottom surface of the first groove (101) is rotatably connected with a rotating shaft (102). The rotating shaft (102) passes through the bottom surface of the workbench (1) and is fixedly connected with a first handwheel (103). The bottom surface of the first groove (101) is provided with two parallel slide rails (104). The inner walls of the two sets of slide rails (104) are slidably connected with racks (105). The two sets of racks (105) are meshed and connected by a gear (106). The ends of the two sets of racks (105) away from the gear (106) are fixedly connected with movable blocks (107).

3. The torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to claim 1, characterized in that: The body (2) is slidably connected to two sides of the bracket (9). The bottom of the bracket (9) is fixedly connected to the top of the movable block (107). The bracket (9) near the temperature control screen (3) is rotatably connected to a drive shaft (10). The drive shaft (10) passes through the bracket (9) and is rotatably connected to a servo motor (11). The end of the drive shaft (10) away from the servo motor (11) is fixedly connected to a first turntable (12). The bracket (9) away from the temperature control screen (3) is rotatably connected to a driven shaft (13). The end of the driven shaft (13) away from the bracket (9) is fixedly connected to a second turntable. The first turntable (12) and the second turntable (14) are detachably mounted with a camera (15). An auxiliary block (16) is fixedly connected to the opposite side of the first turntable (12) and the second turntable (14). A second groove (17) is opened on the opposite side of the two sets of auxiliary blocks (16). The two inner walls of the second groove (17) are rotatably connected by a bidirectional screw (18). The bidirectional screw (18) extends out of the second groove (17) and is fixedly connected with a second handwheel (19). A clamping arm (20) is slidably connected to both ends of the second groove (17). The clamping arm (20) is threadedly connected to the bidirectional screw (18).

4. The torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to claim 1, characterized in that: The high-temperature oven (4) has a sliding door (21) on the front.

5. The torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to claim 1, characterized in that: The diameter of the channel (5) is greater than the length of the bidirectional screw (18).

6. The torsional fatigue testing machine adapted to diesel steel pistons of different specifications according to claim 1, characterized in that: The temperature sensor (7) is electrically connected to the temperature control screen (3), and the temperature control screen (3) is electrically connected to the infrared heating tube (6).

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