Spring fatigue hot testing machine
By designing an independent heating and detection system in the spring fatigue testing equipment, the problem that existing equipment is difficult to simulate high-temperature working conditions is solved, and more accurate and reliable test results are achieved.
Patent Information
- Application Number
- CN202421837930.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-31
AI Technical Summary
Existing spring fatigue testing equipment is difficult to simulate the working conditions at high temperature positions such as engines, resulting in large differences in the test results from the actual application environment.
A spring fatigue heat tester is designed. By dividing the box into two independent parts, setting up a vibration excitation device and a loading device, and setting a heater in the box of the loading device to simulate high-temperature working conditions. At the same time, setting up a displacement detection device in the box of the excitation device to output a digital signal.
Effectively simulate high-temperature working conditions to avoid the impact of high temperature on the vibration excitation device, greatly improving the readability and accuracy of the test results.
Smart Images
Figure CN222866206U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spring testing, in particular to a spring fatigue thermal testing machine. Background Art
[0002] Spring is a commonly used mechanical elastic element, which is widely used in the fields of automobile, machinery manufacturing, engineering structure, etc. When designing and producing springs, spring fatigue testing is an indispensable link, because the fatigue life of the spring directly affects its service life and safety performance.
[0003] The spring fatigue test cycle refers to the number of cyclic loads that a spring experiences before it is damaged or fails under certain experimental conditions. Spring fatigue testing usually requires tens to hundreds of thousands of cycles at a constant load level, and the deformation, stress, strain and other performance indicators of the spring are recorded to understand its hardness, strength, durability and other aspects of performance.
[0004] In actual use, the service life of springs is affected by many factors besides the length of the fatigue test cycle, such as external environmental conditions. For example, the springs in vehicle engines need to operate at high temperatures of several hundred degrees, which is very different from traditional test conditions. Summary of the invention
[0005] The utility model provides a spring fatigue thermal testing machine in view of the problem that the working conditions of springs in high temperature positions such as engines are greatly different from conventional fatigue testing conditions.
[0006] In order to solve the above problems, the technical solution adopted by the utility model is a spring fatigue thermal testing machine, including a vibration excitation device and a loading device, and also including a first box body and a second box body arranged up and down and isolated from each other, the vibration excitation device is arranged in the first box body, the loading device is arranged in the second box body, and a heater is also provided in the second box body; the vibration part of the loading device is connected to the vibration body in the vibration excitation device through a connecting rod, the connecting rod passes through the box walls of the first box body and the second box body, a guide structure is provided between the vibration part of the loading device and the inner wall of the second box body, and a displacement detection device is also provided between the connecting rod or the vibration body and the first box body.
[0007] Preferably, the excitation device is an electromagnetic exciter.
[0008] Preferably, the loading device comprises an upper loading plate, a lower loading plate and a vibration plate, the vibration plate is located between the upper loading plate and the lower loading plate, and the guide structure is arranged between the vibration plate and the second box body.
[0009] Preferably, the loading device also includes a forward and reverse lead screw, and nuts are respectively installed on the two thread sections of the forward and reverse lead screw, the two nuts are respectively connected to the upper loading plate and the lower loading plate, and one end of the forward and reverse lead screw is connected to the loading drive structure.
[0010] Preferably, a shock absorbing structure is provided between the first box body and the second box body.
[0011] Preferably, a box wall of the second box body is provided with a heat insulation layer.
[0012] Preferably, the displacement detection device comprises a magnetic scale and an inductive proton, the inductive proton is mounted on the connecting rod, and the magnetic scale is fixedly mounted inside the second box.
[0013] It can be seen from the above technical scheme that the advantages of the utility model are that, based on the traditional fatigue testing machine, the scheme divides the box into two, arranges the excitation device and the loading device respectively, and arranges a heater in the box of the loading device to simulate high-temperature working conditions. The heat is isolated by chamber partitions to avoid the influence of high temperature on the excitation device. At the same time, a displacement detection device is arranged in the box of the excitation device to output digital signals, which greatly improves the readability and accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.
[0016] Description of main reference numerals
[0017] 1. First box, 2. Second box, 3. Heater, 4. Excitation device, 5. Vibrator, 6. Upper loading plate, 7. Lower loading plate, 8. Vibration plate, 9. Magnetic scale, 10. Inductive proton, 11. Connecting rod, 12. Forward and reverse lead screws. DETAILED DESCRIPTION
[0018] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.
[0019] like Figure 1As shown, a spring fatigue thermal testing machine includes an excitation device 4 and a loading device. In this embodiment, the excitation device 4 is an electromagnetic exciter, and also includes a first box body 1 and a second box body 2 arranged up and down and isolated from each other. The excitation device is arranged in the first box body 1, and the loading device is arranged in the second box body 2. A heater 3 is also provided in the second box body 2; the vibration part of the loading device is connected to the vibration body 5 in the excitation device through a connecting rod 11, and the connecting rod passes through the box walls of the first box body 1 and the second box body 2. A guide structure is provided between the vibration part of the loading device and the inner wall of the second box body 2, and a displacement detection device is also provided between the connecting rod or the vibration body and the first box body 1; the loading device includes an upper loading plate 6, a lower loading plate 7 and a vibration plate 8, the vibration plate 8 is located between the upper loading plate and the lower loading plate, the guide structure is provided between the vibration plate 8 and the second box body, and the loading device also includes a positive and negative thread screw 12, and nuts are respectively installed on the two sections of the thread of the positive and negative thread screw, and the two nuts are respectively connected to the upper loading plate and the lower loading plate, and one end of the positive and negative thread screw 12 is connected to the loading drive structure.
[0020] A shock absorbing structure is provided between the first box body and the second box body. In this embodiment, the shock absorbing structure adopts a spring. The box wall of the second box body is provided with a heat insulation layer. The displacement detection device includes a magnetic scale 9 and an inductive proton 10. The inductive proton is installed on the connecting rod, and the magnetic scale is fixedly installed inside the second box body.
[0021] The working process of the utility model is as follows: the spring to be tested is placed on the upper and lower sides of the vibration plate, and the upper loading plate and the lower loading plate are used to clamp the spring from the upper and lower directions and apply a certain pressure through the positive and negative screws, and then the second box is closed (the second box and the first box are both equipped with switch doors), the heater 3 is started to heat the inside of the second box to the required test temperature, and then the excitation device is started to drive the vibration plate to vibrate up and down, and the vibration amplitude of the vibration plate can be obtained by the magnetic scale in combination with the inductive proton, and the vibration amplitude reflects the compression amount of the spring to be tested.
[0022] It can be seen from the above implementation modes that the beneficial effect of the utility model is that, on the basis of a traditional fatigue testing machine, this scheme divides the box into two, and arranges a vibration device and a loading device respectively, and a heater is provided in the box of the loading device to simulate high-temperature working conditions. The heat is isolated by chamber partitions to avoid the influence of high temperature on the vibration device. At the same time, a displacement detection device is provided in the box of the vibration device to output a digital signal, which greatly improves the readability and accuracy of the test results.
[0023] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A spring fatigue thermal testing machine, comprising a vibration excitation device and a loading device, characterized in that: It also includes a first box and a second box that are arranged up and down and isolated from each other, the excitation device is arranged in the first box, the loading device is arranged in the second box, and a heater is also arranged in the second box; The vibrating part of the loading device is connected to the vibrating body in the excitation device through a connecting rod, which passes through the box walls of the first box and the second box. A guide structure is provided between the vibrating part of the loading device and the inner wall of the second box, and a displacement detection device is also provided between the connecting rod or the vibrating body and the first box.
2. The spring fatigue thermal testing machine according to claim 1, characterized in that: The excitation device is an electromagnetic exciter.
3. The spring fatigue thermal testing machine according to claim 1, characterized in that: The loading device comprises an upper loading plate, a lower loading plate and a vibration plate, the vibration plate is located between the upper loading plate and the lower loading plate, and the guide structure is arranged between the vibration plate and the second box body.
4. The spring fatigue thermal testing machine according to claim 3, characterized in that: The loading device also includes a forward and reverse screw, on which two threads are respectively installed nuts, which are respectively connected to the upper loading plate and the lower loading plate, and one end of the forward and reverse screw is connected to the loading drive structure.
5. The spring fatigue thermal testing machine according to claim 1, characterized in that: A shock absorbing structure is provided between the first box body and the second box body.
6. The spring fatigue thermal testing machine according to claim 1, characterized in that: The box wall of the second box body is provided with a heat insulation layer.
7. The spring fatigue thermal testing machine according to claim 1, characterized in that: The displacement detection device comprises a magnetic scale and an inductive proton, wherein the inductive proton is mounted on the connecting rod and the magnetic scale is fixedly mounted inside the second box.