CN100472195C

CN100472195C - Test method for failure of automobile coolant storage tank

Info

Publication number: CN100472195C
Application number: CNB2006101476171A
Authority: CN
Inventors: 李传江
Original assignee: Shanghai Normal University
Current assignee: Shanghai Normal University
Priority date: 2006-12-20
Filing date: 2006-12-20
Publication date: 2009-03-25
Anticipated expiration: 2026-12-20
Also published as: CN1987393A

Abstract

The invention discloses a failure test method for an automobile compensation fluid storage tank, which can simulate the actual working conditions of the storage tank (liquid pressure and temperature in the tank, ambient temperature, etc.), and maintain the temperature and pressure of the liquid in the test piece of the storage tank Constant, keep the ambient temperature within a certain range, and carry out the durability test of the liquid storage tank on multiple specimens at the same time. The test uses a computer to monitor the whole process in real time, and uses computer technology to collect system pressure parameters, and automatically judges the experimental results of the specimens through intelligent programs. It is very important to test the time from work to rupture of the liquid storage tank under specific working conditions for the study of the performance of the liquid storage tank, design and improvement of the structure of the liquid storage tank. It is beneficial to make full use of limited resources, reduce energy consumption, and effectively improve detection efficiency.

Description

Failure test method for automobile cooling liquid storage tank

Technical field

The present invention relates to a kind of failure test method for automobile cooling liquid storage tank, belong to the electromechanical integration field.

Background technology

Because the structure and the operating mode of the cooling liquid storage tank of various types of automobiles are not quite similar, the fluid reservoir failure test does not have same method, can only come the testing equipment of design specialized to test according to concrete condition separately.Existing fluid reservoir test all adopts complete manual easy device to finish, and can not carry out environment temperature simulation.Because single test will continue not only to spend a large amount of manpowers about 500 hours, and tests the operating mode that can not reflect the fluid reservoir real work, the accuracy of test is had a greatly reduced quality.

Summary of the invention

The purpose of this invention is to provide a kind of method that can simulate environment for use, adopt computer control, a plurality of fluid reservoir to test simultaneously.In order to reach this purpose, the step of failure test method for automobile cooling liquid storage tank of the present invention is:

A. several described fluid reservoir test specimens are placed on and have that equal number detects station, continue more than 500 hours in the environment that can be incubated, described environment temperature is 40～90 ℃, continuously scalable;

B. feed low-corrosiveness or non-corrosiveness liquid medium for each fluid reservoir test specimen that detects on the station with certain pressure and temperature, medium circulation flows, thereby make medium temperature remain on 40～135 ℃, adjustable continuously, error is ± 2.5 degree, pressure medium remains on 1.0～3.0bar, and is adjustable continuously, precision ± 0.1bar; Described liquid medium is the ethylene glycol type liquid coolant;

C. the force value of online in real time tracer liquid medium system and temperature value;

D. periodically each test specimen was carried out rupture and leakage check, the method for inspection: read the test specimen force value No. 1, close this branch road valve every 5 minutes, read the force value of this test specimen after 20 seconds once more, pressure falls relatively, if front and back pressure falls above preset value, thinks that then this test specimen leaks; Do not surpass preset value if front and back pressure falls, think that then this test specimen does not leak, open this branch road valve simultaneously and continue test; In like manner and the like carry out other branch road leakage differentiate;

E. if differentiating certain test specimen that comes out leaks, close this way solenoid valve immediately, and write down from beginning to be tested to the time that leakage is experienced, this branch road withdraws from test;

F. other branch road continues test, all leaks up to all testpieces, and test finishes.

The monitoring software that above-mentioned check program and differentiation process are carried out by computing machine is finished.

Failure test method for automobile cooling liquid storage tank of the present invention has following characteristics: (1) can simulate the operating mode (pot liquid pressure and temperature, environment temperature etc.) of fluid reservoir and carry out experimental test, and precision of test result is improved greatly; (2) can test a plurality of test specimens simultaneously, can withdraw from test automatically after certain test specimen breaks, help making full use of Limited resources, cut down the consumption of energy, improve constantly testing efficiency; (3) the utilization computer technology is differentiated the experimental result of test specimen automatically by intelligent program, both can improve test accuracy effectively, can reduce tester's labour intensity significantly again; (4) test out the time that fluid reservoir work is experienced to breaking under specific operating mode, play crucial effects for the structure of studying fluid reservoir performance, design and improvement fluid reservoir.

Description of drawings

Fig. 1 is the process flow diagram of failure test method for automobile cooling liquid storage tank of the present invention.

Embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.

Fluid reservoir failure test step of the present invention as shown in Figure 1, at first n fluid reservoir test specimen to be measured is placed in the cool-bag, have n in the container and detect station, environment temperature is 40～90 ℃, its temperature value is set according to the actual condition of fluid reservoir working environment, and its error range is ± 5 ℃;

Secondly feed liquid medium---ethylene glycol type liquid coolant by piping system for the test specimen fluid reservoir that each detects on the station with certain pressure and temperature, its concentration nearly 100%, possess low corrosion or do not have corrosive property, to reduce medium corrosion-damaged to test specimen; The pressure of medium is that 1.0～3.0bar, temperature are 40～135 ℃, and its temperature and pressure value also is that the operating mode during according to the fluid reservoir real work is set, and the pressure error scope is ± 0.1bar; And to require piping system be that test specimen continued pressure-maintaining and heat-preservation more than 500 hours;

Online in real time detects the force value and the temperature value of fluid dielectric coolant system;

Close the solenoid valve of No. 1 test specimen pipeline branch road, write down the force value of this testpieces this moment simultaneously, write down the force value of this testpieces after 20 seconds once more, if front and back pressure falls greater than predetermined value, then judge this test specimen leakage failure, this branch road is cut off deactivates, and record is from beginning to be tested to the time that leakage is experienced; If front and back pressure falls less than predetermined value, show that then test specimen did not also lose efficacy, open this way solenoid valve immediately, test specimen is dropped into test once more;

By that analogy, use the same method other test specimen is leaked differentiation;

The differentiation cycle was 5 minutes, repeated above-mentioned differentiation flow process every 5 minutes, all broke up to all test specimens, and termination test prints the test findings of each test specimen;

The monitoring software that above-mentioned check program and differentiation process are carried out by computing machine is finished.By computer settings simulated condition parameter, gather the experimentation data, send work order, record testing result etc.

Claims

1. A method for failure test of an automobile coolant liquid storage tank, the steps of which are:

a. Place several liquid storage tank test pieces in an environment with the same number of detection stations and heat preservation for more than 500 hours, and the temperature of the environment is 40-90°C;

b. Through the pipeline system, a low-corrosive or non-corrosive liquid medium with a certain pressure and temperature is introduced into the test piece of the liquid storage tank on each testing station. Keep at 1.0~3.0bar;

c. On-line real-time detection of the pressure value and temperature value of the liquid medium system;

d. Periodically check the rupture and leakage of each liquid storage tank test piece at regular intervals. The inspection method is: read the pressure value of the No. 1 liquid storage tank test piece, and close the valve of the pipeline branch of the No. 1 liquid storage tank test piece After 20 seconds, read the pressure value of No. 1 liquid storage tank test piece again, and compare the pressure drop before and after. If the front and rear pressure drop exceeds the preset value, it is considered that the No. 1 liquid storage tank test piece is leaking; If the value is set, it is considered that the test piece of the No. 1 liquid storage tank has not leaked, and at the same time, the valve of the pipeline branch of the test piece of the No. 1 liquid storage tank is opened to continue the test; similarly, the leakage judgment of the other liquid storage tank test pieces is carried out by analogy;

e. If it is judged that a liquid storage tank test piece leaks, immediately close the valve of the pipeline branch of the liquid storage tank test piece, and record the time elapsed from the start of the test to the leakage, and the liquid storage tank test piece exits the test;

f. The liquid storage tank test pieces on other testing stations continue to test until all the liquid storage tank test pieces leak, and the test is completed.

2. The liquid storage tank failure test method according to claim 1, characterized in that: the liquid medium is ethylene glycol type automotive special coolant.

3. The liquid storage tank failure test method according to claim 2, characterized in that: the liquid medium is heat-preserved and pressure-maintained in a circulating flow mode, the temperature value of the liquid medium is continuously adjustable, the error is ±2.5°C, and the pressure value of the liquid medium is continuously adjustable. Adjustment, the accuracy is ±0.1bar.

4. The liquid storage tank failure test method according to claim 3, characterized in that: the time interval for periodically performing the rupture and leakage inspection on each liquid storage tank test piece is 5 minutes.

5. The liquid storage tank failure test method as claimed in claim 1, 2, 3 or 4, characterized in that: the leakage of the liquid storage tank test piece is determined by the pressure before and after the valve of the liquid storage tank test piece pipeline branch is turned off and delayed. The entire test and identification process is completed by computer monitoring software.