CN1587953A

CN1587953A - Analogue method for automobile cooling fan motor bearing life test

Info

Publication number: CN1587953A
Application number: CN 200410053480
Authority: CN
Inventors: 方正全; 吴军彪
Original assignee: Individual
Current assignee: CIXING GROUP Co Ltd
Priority date: 2004-07-30
Filing date: 2004-07-30
Publication date: 2005-03-02
Anticipated expiration: 2024-07-30
Also published as: CN1288430C

Abstract

An electric machinery bearing life experimental simulating method of cooling fan auto is closed. The working temperature change condition of cooling fan in auto is simulated by thermal control box and the method of series resistance is used in major loop of electric machine to adjust current and electric power, which has realized velocity control to rotating speed of electric machine. Meanwhile, in the condition of temperature circulation and rotating speed circulation, do simulated experiment to electric machinery bearing life of electric machine and analyze influence of temperature and to property of electric machinery bearing by experimental data. The experimental circumstance simulated by the method is more coincident practical working condition of electric machinery bearing of cooling fan in auto, which makes the experimental data more accurate and reliable, reflecting practical condition and evaluating life property of electric machinery bearing under complex circumstance better and supplying scientific foundation for developing quality of bearing.

Description

Bearing Life Test Analogy Method of Automotive Cooling Fan Motor

Technical field

The present invention relates to a kind of analogy method of motor bearings durability test, particularly Bearing Life Test Analogy Method of Automotive Cooling Fan Motor.

Background technology

Because the automobile cooling fan motor bearings life-span is the key factor that influences the cooling fan effect, equipment such as protection motor car engine are had great importance, its quality quality plays an important role to motor live time, is very important part.

But prior motor bearing life test, generally under a certain constant rotational speed, finish by the monitoring bearing Dynamic Signal, and reckon without the influence of load variations or variation of ambient temperature to bearing life, in fact the working environment of automobile cooling fan motor bearings is very complicated, not only the variation of ambient temperature scope is bigger, and also there is variation in a big way in operating load, cause again that thus certain variation takes place rotating speed thereupon, and the variation of condition of work is to the greasy property of bearing, the rotation dynamic property all has very big influence, so adopt conventional motor bearings durability test, resulting data all are ideal values, be difficult to obtain reliable, real test figure, with these data is to estimate the life characteristics of motor bearings, only can be poor as the reference practical value.

Summary of the invention

Technical matters to be solved by this invention is: a kind of Bearing Life Test Analogy Method of Automotive Cooling Fan Motor is provided, simulate an experimental enviroment that more meets automobile cooling fan motor bearings actual operating conditions, under the working condition of simulation, carry out the motor bearings durability test, for the test of automobile cooling fan bearing life provides effective test figure, provide effective, true, definite test figure and scientific basis for further improving the motor bearings quality.

The present invention addresses the above problem the technical scheme that is adopted, Bearing Life Test Analogy Method of Automotive Cooling Fan Motor: the automobile cooling fan that, motor bearings will be installed, be fixed on and be equipped with on the adjustable temperature control box central base sheet of temperature sensor and temperature, motor is carried out temperature cycles control

Two, motor moves 8～10 hours down for 104～110 ℃ in temperature earlier, moves 0.5～1.5 hour down for 115～125 ℃ in temperature then, and as a temperature cycles cycle, constantly repetitive cycling test adds up to move 1900～2100 hours,

Three, starter motor rotating speed cycle control simultaneously; motor under 2000～2500 rev/mins speed, turned round 3～7 minutes, then under 2600～3000 rev/mins of speed earlier; turned round 1.5～3.5 minutes; under 2000～2500 rev/mins of speed, turned round 3～7 minutes once more, shut down at last 1.5～3.5 minutes; as a rotating speed cycle period; constantly repetitive cycling test, accumulative total is moved 1900～2100 hours

Four, motor in the process of the test of temperature cycles control and rotating speed cycle control, is monitored Dynamic Signal and electrical quantity signals such as motor speed, electric current, electric power simultaneously at any time,

Five, operation is after 1900～2100 hours, and observation power of motor loss situation just thinks that when the power attenuation value surpasses 10% of initial value bearing scraps, and by the influence to bearing performance of test data analyzer temperature, rotating speed.

Compared with prior art, the invention has the advantages that: original motor bearings life-span simulation test is carried out indoor, and under a specific unconverted rotating speed, carry out, and this method employing is carried out in temperature control box, the temperature change situation of simulated automotive cooling fan, employing is resistance in series in motor main circuit, by changing the size of adjustable resistance, realize adjusting circuital current, change the purpose that the test motor speed changes thereby reach, i.e. test is all carried out in changing environment, therefore by its tests of simulating environment, the actual operating conditions that more meets the automobile cooling fan motor bearings, the test figure that draws thus is more reliable, definitely, can reflect truth, more with practical value, more can correctly estimate the life characteristics of motor bearings under the complex work environment, provide scientific basis for further improving bearing quality.

Entire test is all carried out under the robotization of industrial computer control in addition, thus make simulated conditions, simulated environment is accomplished and abundant assurance, thereby also guaranteed test findings, the reliability of test figure, practicality.

Description of drawings

Fig. 1, motor speed Principles of Regulation figure.

Fig. 2, control principle figure of the present invention.

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are further described.

The test motor is selected 13 volts of direct current generators for use, then the D.C. regulated power supply output valve is 13 volts, temperature sensor is installed on the temperature control box, be used to measure the temperature inside the box, current vortex sensor is installed, be used to measure motor speed, adopt electrical parameter measuring instrument to measure the motor electrical quantity, and be connected with industrial computer by the RS232 interface, another road of industrial computer is by I/O interface and rotating speed cycle control, temperature control box, D.C. regulated power supply, test motor connect, and realize the switch control and the temperature cycles control of motor different rotating speeds, realize the whole test system is controlled automatically.

This method adopts in temperature control box, the working temperature change conditions of simulated automotive cooling fan, employing is in motor main circuit, the resistance in series method is adjusted the electric current and the electric power of motor, thereby realize the speed regulating control of motor speed, under temperature cycles condition and rotating speed cycling condition, the motor bearings life-span is carried out simulation test simultaneously.

Embodiment:

Analogy method:

One, the automobile cooling fan of motor bearings will be installed, be fixed on and be equipped with temperature sensor, and on the adjustable temperature control box central base sheet of temperature, motor be carried out temperature cycles control,

Two, motor moves 9 hours earlier under 107 ℃ of temperature, moves 1 hour then under 120 ℃ of temperature, as a temperature cycles cycle, and constantly repetitive cycling test, accumulative total circulates 200 times, adds up to move 2000 hours,

Three, starter motor rotating speed cycle control simultaneously; motor turned round 5 minutes under 2250 rev/mins of speed earlier; under 2800 rev/mins of speed, turned round 2.5 minutes then; motor turned round 5 minutes under 2250 rev/mins of speed once more, shut down at last 2.5 minutes, as a rotating speed cycle period; constantly repetitive cycling test; accumulative total circulates 8000 times, and accumulative total is moved 2000 hours

Four, motor in the process of the test of temperature cycles control and rotating speed cycle control, will be monitored Dynamic Signal and electrical quantity signals such as motor speed, electric current, electric power simultaneously at any time,

Five, operation is after 2000 hours, and observation power of motor loss situation just thinks that when the power attenuation value surpasses 10% of initial value bearing scraps, and understands the influence to bearing performance of temperature, rotating speed by test data analyzer.

Claims

1; a kind of Bearing Life Test Analogy Method of Automotive Cooling Fan Motor; it is characterized in that method one; the automobile cooling fan of motor bearings is installed; be fixed on and be equipped with on the adjustable temperature control box central base sheet of temperature sensor and temperature; motor is carried out temperature cycles control; two; motor moves 8～10 hours down for 104～110 ℃ in temperature earlier; move 0.5～1.5 hour down for 115～125 ℃ in temperature then; as a temperature cycles cycle; constantly repetitive cycling test; accumulative total is moved 1900～2100 hours; three; starter motor rotating speed cycle control simultaneously; motor is earlier under 2000～2500 rev/mins speed; turned round 3～7 minutes; then under 2600～3000 rev/mins of speed; turned round 1.5～3.5 minutes; once more under 2000～2500 rev/mins of speed; turned round 3～7 minutes; shut down at last 1.5～3.5 minutes; above as a rotating speed cycle period; constantly repetitive cycling test; accumulative total is moved 1900～2100 hours; four; motor is simultaneously in the process of the test of temperature cycles control and rotating speed cycle control; at any time monitor motor speed; electric current; Dynamic Signal and electrical quantity signals such as electric power; five; move after 1900～2100 hours; observation power of motor loss situation just thinks that when the power attenuation value surpasses 10% of initial value bearing scraps, and by the test data analyzer temperature; rotating speed is to the influence of bearing performance.

2, method according to claim 1 is characterized in that motor operation 9 hours under 107 ℃ of temperature earlier, operation 1 hour under 120 ℃ of temperature then, as a temperature cycles cycle be 10 hours, accumulative total is moved 200 circulations.

3, method according to claim 1; it is characterized in that motor turned round 5 minutes earlier under 2250 rev/mins of speed; under 2800 rev/mins of speed, turned round 2.5 minutes then; motor turned round 5 minutes under 2250 rev/mins of speed once more; shut down at last 2.5 minutes; as a rotating speed cycle period is 15 minutes, and accumulative total is moved 8000 circulations.

4, method according to claim 1 is characterized in that motor simultaneously in the process of the test of temperature cycles control and rotating speed cycle control, moves after 2000 hours, observes the power of motor loss.