JPH09210861A - Abnormality detector for bearing of power train tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a bearing against seizing while facilitating maintenance and inspection by providing a bearing with a temperature detector. SOLUTION: A shaft 4 is fitted with a flywheel 1 which is provided, at the opposite ends thereof, with bearings 2 and one bearing is coupled with a sample 3. An electric temperature detector 5, e.g. a thermocouple or a temperature measuring resistor, is driven into the bearing 2 and secured in place. A controller is previously set with an allowable upper limit temperature and an allowable upper limit temperature rise rate. Output signal from the detector 5 is transmitted to the controller and the operation of a power train tester is stopped when the allowable upper limit temperature or the allowable upper limit temperature rise rate is exceeded. According to the arrangement, generation of abnormal torque due to seizing of bearing 2 is prevented and the sample 3 can be protected against damage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality detecting device for a bearing device of a power train tester.

[0002]

2. Description of the Related Art Conventionally, in a bearing device provided at both ends of a flywheel of a power train tester, the bearing device may be burned due to a temperature rise during a continuous durability test and the bearing may be locked. When this happens,
Excessive torque is generated in the mechanical device, and the mechanical device may be damaged, and at the same time, the specimen may be damaged.

[0003]

As a countermeasure against these problems, at present, the bearing is cooled by forced ventilation by a fan, but the wind force varies depending on the test piece, and there is no standard as a guideline, so that the power train tester is continuous. It was not preferable for carrying out the durability test. The present invention was devised in view of the above-mentioned points, and an object thereof is to provide an abnormality detecting device for a bearing device of a power train tester, which can prevent burning of the bearing device and facilitate maintenance and inspection. Especially.

[0004]

[Means for Solving the Problems] That is, a means for achieving the object is to install a flywheel, provide bearing devices at both ends of the flywheel, and provide a shaft to which a test piece is connected to one end. In a bearing device for a power train tester, the bearing device includes a temperature detector. As the temperature detector, an electric type such as a thermocouple or a resistance temperature detector is used. Further, there is provided a control device that presets an allowable upper limit temperature of the bearing device, a lower limit temperature lower than the allowable upper limit temperature, and a temperature increase rate per unit time from the lower limit temperature to the allowable upper limit temperature. In such a configuration, the output signal from the temperature detector is transmitted to the control device, and the operation of the power train tester is stopped when the bearing temperature exceeds the allowable upper limit temperature or the temperature rising speed. In addition, when the bearing temperature exceeds the allowable upper limit temperature or the temperature rising speed,
This is the time to replenish or replace the grease.

[0005]

1 is a schematic configuration diagram of a bearing device for a power train tester according to the present invention, FIG. 2 is an explanatory diagram of main parts of FIG. 1, and FIG. 3 is a characteristic diagram for explaining its operation. In FIGS. 1 and 2, a power train tester is one in which a flywheel 1 is fitted, bearing devices 2 are provided at both ends of the flywheel 1, and a shaft 4 to which a specimen 3 is connected is provided on one side. Then, the temperature detector 5 of the present invention is screwed into the bearing device 2. As the temperature detector 5, an electric type such as a thermocouple or a resistance temperature detector is used. Further, although not shown, a control device is provided, and as shown in FIG. 3, the control device has an allowable upper limit temperature A of the bearing device 2.
And a lower limit temperature B lower than the allowable upper limit temperature A, and a temperature rising rate (v = ΔT / t) per unit time from the lower limit temperature B to the allowable upper limit temperature A are provided in advance. . In addition, 6 is a case and 7 is a fixed stand.

In such a structure, when the output signal from the temperature detector 5 is transmitted to the control device, when the bearing temperature becomes equal to or higher than the allowable upper limit temperature A or the temperature rising speed v, the power train tester is operated. It stops the operation. As another means, the bearing temperature is the allowable upper limit temperature A or the temperature rising rate v = (ΔT / t) ( ⁰ C / sec)
When the above is reached, it is decided as a time to replenish or replace the grease, and maintenance inspection is performed.

[0007]

As described above, according to the present invention, the temperature detector 5 is provided in the bearing device 2, and the bearing temperature is set to the allowable upper limit temperature A or the temperature rising speed v according to the output signal.
When it is above, you can perform the operation as described above,
The occurrence of abnormal torque due to burnout of the bearing as in the past has been eliminated, and along with this, it has become possible to prevent damage to the specimen.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a bearing device of a power train tester of the present invention.

FIG. 2 is an explanatory diagram of a main part of FIG.

FIG. 3 is a characteristic diagram for explaining the operation.

[Explanation of symbols]

 1 Flywheel 2 Bearing device 3 Specimen 4 Shaft 5 Temperature detector A Allowable upper limit temperature B Lower limit temperature v Temperature rising rate

Claims (4)

[Claims] 1. A bearing device of a power train tester, comprising a shaft to which a flywheel is fitted, bearing devices are provided at both ends of the flywheel, and one end of which is connected to a temperature sensor. An abnormality detecting device for a bearing device of a power train tester, comprising: 2. The abnormality detecting device for a bearing device of a power train tester according to claim 1, wherein the temperature detector is an electric type such as a thermocouple or a resistance temperature detector. 3. A control device that presets an allowable upper limit temperature of the bearing device, a lower limit temperature lower than the allowable upper limit temperature, and a temperature increase rate per hour from the lower limit temperature to the allowable upper limit temperature, The power train tester according to claim 1 or 2, wherein an output signal from the temperature detector is transmitted to the control device, and the operation of the power train tester is stopped when the bearing temperature exceeds the allowable upper limit temperature or the temperature rising speed. Bearing device abnormality detection device. 4. The abnormality detection of the bearing device of the power train tester according to claim 1, 2 or 3, wherein when the bearing temperature becomes equal to or higher than the allowable upper limit temperature or the temperature rising speed, it is time to replenish or replace grease. apparatus.