CN-121977867-A - High-low temperature rapid alternating durability testing device and method for suspension vibration reduction component

CN121977867ACN 121977867 ACN121977867 ACN 121977867ACN-121977867-A

Abstract

The high-low temperature rapid alternating durability testing device for the suspension vibration reduction component is arranged on a test platform and comprises a loading tool and a temperature alternating system, wherein the upper end of the loading tool can be connected with loading equipment, and the temperature alternating system is arranged on the loading tool and forms fatigue loading along with the starting of the loading equipment. According to the invention, the durability test of the suspension vibration reduction component under high-low temperature rapid alternation is realized, the durability of the suspension vibration reduction component in a complex alternating temperature environment is accurately represented, and the accuracy and reliability of the durability test of the suspension vibration reduction component are improved. The invention also provides a method for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component.

Inventors

GE QI
SHEN KUI
JIANG YUNHAO
WANG YEQING
DENG JIAO
HUANG ANMIN
RONG JIGANG
WANG JIN
Shen Tanxiao
CHEN JUNHUI
LUO JUN

Assignees

株洲时代新材料科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260130

Claims (10)

1. The high-low temperature rapid alternating durability testing device for the suspension vibration reduction component is arranged on a test platform and comprises a loading tool and a temperature alternating system, wherein the upper end of the loading tool can be connected with loading equipment, and the temperature alternating system is arranged on the loading tool and forms fatigue loading along with the starting of the loading equipment.
2. The device for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 1, further comprising a temperature rising mechanism, wherein the temperature rising mechanism comprises an air heater controlled by a controller, an air inlet pipe and an air outlet pipe, the air inlet pipe is connected with the air heater, the air inlet pipe penetrates into the outer temperature box, the end part of the air inlet pipe stretches into the inner temperature box, one end of the air outlet pipe stretches into the inner temperature box, the other air outlet pipe penetrates out of the outer temperature box, the air inlet pipe and the air outlet pipe are arranged on two opposite sides of the inner temperature box, the number of the air inlet pipes is greater than or equal to the number of the air outlet pipes, and the inner diameter of the air inlet pipe is at least three times that of the air outlet pipes.
3. The device for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 1, wherein the outer temperature box is a programmable temperature control box, the movable door is arranged on the front side surface of the inner temperature box, the outer temperature box is provided with an outer box door corresponding to the movable door, and the outer box door is provided with a transparent visual area.
4. The device for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 1, wherein the loading fixture comprises a loading fixing seat for supporting the suspension vibration reduction component, a clamping seat for clamping the suspension vibration reduction component in cooperation with the loading fixing seat, and a loading connector fixedly connected with the clamping seat and arranged in the vertical direction, a force transmission supporting seat on the test platform extends into the inner incubator, the loading fixing seat is arranged on the transmission supporting seat, and the loading connector penetrates out of the inner incubator and the outer incubator to be connected with loading equipment.
5. The device for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 1, further comprising a gating component which is connected with the movable door and can control the opening degree of the movable door, wherein the gating component is controlled by the controller.
6. The device for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 5, wherein the movable door is vertically movably arranged on the inner temperature box, the door control assembly comprises an electric telescopic rod controlled by the controller and a mounting seat for mounting the electric telescopic rod, the electric telescopic rod is vertically arranged, and the upper end of the movable door penetrates out of the outer temperature box to be connected with the telescopic end of the electric telescopic rod.
7. A method for testing high-low temperature rapid alternating durability of a suspension vibration reduction component, which adopts the device for testing high-low temperature rapid alternating durability of the suspension vibration reduction component according to any one of claims 1 to 6, and is characterized by comprising the following steps: S1, mounting a suspension vibration reduction component on a loading tool, and connecting the upper end of the loading tool with loading equipment; s2, controlling the inner incubator to heat up to a preset high temperature and preserving heat, and controlling the outer incubator to cool down to a preset low temperature and preserving heat, so that the temperature difference between the inner incubator and the outer incubator exceeds 60 ℃; s3, starting loading equipment to load the suspension vibration reduction component; S4, when the loading of the suspension vibration reduction component reaches the high-temperature loading preset time, controlling the inner temperature box to stop heat preservation, and opening the movable door to communicate the inner temperature box with the outer temperature box, so that the temperature of the inner temperature box is quickly reduced to be consistent with the temperature of the outer temperature box; S5, when the loading of the suspension vibration reduction component reaches the low-temperature loading preset time, closing the movable door, controlling the inner temperature box to be heated to the preset high temperature again and preserving heat, so that the temperature difference between the inner temperature box and the outer temperature box exceeds 60 ℃; and S6, repeating the steps S4 and S5 at least three times, and carrying out durability test on the suspension vibration reduction component under high and low temperature rapid alternation.
8. The method for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 7, wherein the step of opening the movable door to communicate the inner temperature box with the outer temperature box is characterized in that the step of controlling the electric telescopic rod to shorten the movable door so as to communicate the inner temperature box with the outer temperature box, and the cold air of the outer temperature box enters the inner temperature box so as to rapidly cool the inner temperature box.
9. The method for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 8, wherein the opening degree of the movable door is controlled by controlling the shortening amount of the electric telescopic rod when the movable door is opened, so that the cooling speed of the inner temperature box is controlled to reach 15+/-5 ℃ per minute, and the temperature rising and lowering temperature of the inner temperature box is controlled by controlling the output power of the hot air blower of the temperature rising mechanism when the temperature rising mechanism is started, so that the temperature rising speed of the inner temperature box reaches 15+/-5 ℃ per minute.
10. The method for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component according to claim 7, wherein the step S3 is performed by applying alternating load to the suspension vibration reduction component through loading equipment, so that the suspension vibration reduction component is subjected to the durability test under the conditions of alternating load and alternating temperature.

Description

High-low temperature rapid alternating durability testing device and method for suspension vibration reduction component Technical Field The invention relates to a high-low temperature rapid alternating durability test device and method for a suspension vibration reduction component, and belongs to the technical field of fatigue performance test of suspension vibration reduction components. Background Fatigue failure phenomena generated by the material under the combined action of temperature alternation and mechanical strain circulation can lead to obvious reduction of the performance of the component or the material, formation or expansion of cracks of the material and finally influence the service life of the component or the material. Some important parts work in a high-low temperature alternating environment for a long time, and equipment cannot normally operate due to mechanical fatigue failure, so that economic loss is caused, and even serious consequences are caused. The suspension system is used as an important component of the train and plays a vital role in running safety, stability and comfort of the train. However, the climatic conditions of the particular complex alternating temperature loads in the plateau region present a serious challenge for the operation of the nonmetallic suspension components of the railroad train. Wherein complex alternating temperature loading is a critical factor. In the plateau area, the day and night temperature difference can reach 20-30 ℃, the season temperature difference is more remarkable, the lowest temperature in winter can reach below-30.6 ℃, tunnel geothermal factors are overlapped, and the temperature amplitude of the inside and outside of a tunnel in winter exceeds 60 ℃. Such drastic temperature changes can have a versatile impact on the critical components of the train suspension system. If the vibration reduction component of the suspension system is degraded or damaged under the condition of complex alternating temperature load on the plateau, the dynamic performance of the train is directly affected, and the safety accidents such as severe vibration and derailment and the like can be caused in the running process of the train, so that the life and property safety of passengers is seriously threatened. Meanwhile, running stability and comfort of the train can be reduced, and bad traveling experience is brought to passengers. It is therefore necessary to perform fatigue tests on vibration-damped components in suspension systems under alternating temperatures and loads. The existing fatigue durability test is generally carried out at normal temperature, the bearing component is clamped by using a tool, the bearing component is loaded by using loading equipment, the fatigue performance of the vibration reduction component under the normal temperature condition is tested, for example, the fatigue performance of the vibration reduction component under the variable temperature condition is tested, the tool is mostly arranged in an incubator, the environment temperature is changed through the variable temperature of the incubator, but the temperature rise/fall speed of the incubator in the prior art is slower, the temperature rise/fall speed is generally 1-2 ℃ per minute, the temperature rise/fall speed is inconsistent with the complex alternating temperature environment working condition of a plateau, the rapid alternating of the temperature cannot be formed, and the accuracy of test characterization is not high. The high-low temperature rapid alternating test box in the prior art can only realize rapid temperature alternating, and can not be matched with a tool and loading equipment to realize loading under the condition of temperature alternating. Disclosure of Invention The high-low temperature rapid alternating durability test device for the suspension vibration reduction component provided by the invention realizes the durability test of the suspension vibration reduction component under high-low temperature rapid alternating, accurately represents the durability of the suspension vibration reduction component in a complex alternating temperature environment, improves the accuracy and reliability of the durability test of the suspension vibration reduction component, and detects the fatigue durability of the suspension vibration reduction component under double alternating temperatures and loads. The invention also provides a method for testing the high-low temperature rapid alternating durability of the suspension vibration reduction component. In order to achieve the above purpose, the invention adopts the following technical scheme: The high-low temperature rapid alternating durability testing device for the suspension vibration reduction component is arranged on a test platform and comprises a loading tool and a temperature alternating system, wherein the upper end of the loading tool can be connected with loading equipment, and the temperature alt