JPH0694575A - Bearing tester - Google Patents

Abstract

PURPOSE:To make it easy to perform exchange and inspection of bearings because it is not necessary for them to immerse the whole tester in a liquid and to immerse them in a small quantity of the liquid because it is supplied to its small space part. CONSTITUTION:Seal cases 7 are provided on the inner circumferential faces of both the ends of a hollow housing 1, respectively, and oil seals 6 are set on the inner circumferential faces of the seal cases 7 in a bearing tester. A space part 2 is formed by means of the housing 1, the seal cases 7 and the oil seals 6, a bearing 3 is inserted in the inner circumferential faces of a center part of the space part 2 so as not to be rotated, a shaft 4 penetrates both the oil seals 6 and the bearing 3, a liquid is supplied to the space part 2 and the bearing 3 is immersed in it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing testing device for measuring, for example, a coefficient of friction.

[0002]

2. Description of the Related Art Due to the diversification of purposes of use, there is a great demand for measuring the sliding characteristics of bearings when used in liquid.

[0003]

[Problems to be Solved by the Invention] However,
Since many sensors for measurement are provided, the device itself cannot be immersed in the liquid.

[0004]

SUMMARY OF THE INVENTION The present invention provides a bearing testing device capable of performing a submerged test with a simple structure, and has taken the following technical means. That is, the bearing test apparatus is configured such that the space 2 capable of storing the liquid is provided inside the housing 1, and the rotatable shaft 4 is inserted into the bearing 3 provided in the space 2.

[0005]

When the rotational movement is transmitted to the shaft 4, the shaft 4 rotates while being supported by the bearing 3. At this time, since the shaft 4 comes into contact with the bearing 3, the housing 1 in which the bearing 3 is provided also rotates in the same direction as the rotation direction. Therefore, the coefficient of friction of the bearing 3 can be obtained by measuring the force associated with this rotation with the measuring means and calculating it. Since the liquid is stored in the space 2, the bearing 3 is immersed in the liquid at the time of measurement.

[0006]

[Effect] Since it is not necessary to immerse the entire test apparatus in the liquid, it is easy to replace the bearing. Further, since the housing 1 is provided with the space for storing the liquid, the structure is simplified.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, the structure thereof will be described. The housing 1 is a hollow cylinder whose both ends in the axial direction are open, and an oil seal 6 and a seal casing are provided on the inner peripheral surfaces of the both ends.
This seal case 7 in which the shoe 7 is arranged inside and outside is detachably attached with a screw 8. 9 is the housing 1 and the seal cage
It is an o-ring provided between the sleeve 7 and the sleeve 7.

The bearing 3 includes a housing 1 and an oil seal 6
In addition, it is fitted in the inner peripheral surface of the housing 1 in the space portion 2 surrounded by the seal case 7 and at the intermediate portion in the axial direction so as not to rotate. The bearing 3 is the oil seal.
Has an inner diameter substantially the same as that of the ring 6, and also penetrates a shaft 4 rotatably provided on both inner diameter portions. Reference numerals 10 and 11 denote hollow tubes, which are detachably attached to the housing 1 and communicate with one space portion 2, and another tube 11 is detachably attached to the housing 1 and the other space portion 2 Is in communication with. A passage 12 is formed in the thick portion of the housing 1 where the bearing 3 is provided so as to connect the space portions 2 and 2. Further, the pipe 10 communicates with a pump 14 via a supply pipe 13, and the pump 14 communicates with a tank 15 containing a liquid such as water or oil via the supply pipe 13. One pipe 11 communicates with the tank 15 via a return pipe 16.

Reference numeral 17 denotes a load cell, which is a housing 1
It is provided so as to be able to contact the pushing plate 18 that projects substantially horizontally from the outer surface of the. A displacement gauge support plate 21 having a displacement gauge 20 in contact with the receiving body 19 is attached to the bottom outer surface of the housing 1 at its lower end. Explaining the block circuit of FIG. 3, reference numeral 21 denotes an arithmetic control unit (hereinafter referred to as CPU) of a microcomputer (not shown) having a memory 22 in which data, control programs and the like are incorporated. Performs logical operations, etc. The information input to the CPU 21 via the input interface 23 includes work information from the work switch 25 of the drive source (for example, motor) 24 that drives each rotating unit, and measurement information from the measurement switch 26. There are information, measurement information from the load cell 17, measurement information from the displacement gauge 20, and the like. The information output from the CPU 21 includes a display command signal for digitally and analogally displaying the measurement data on the display device 27, and an output interface 28.
As the command signal output from the CPU 21 via the, there are a drive start / stop signal to the drive source 24, a signal to the pump 14, and the like.

Next, the operation will be described. First, the shaft 4 is penetrated through both oil seals 6 without providing the bearing 3. With this configuration, the work switch 25 and the measurement switch 26 are turned on, and a predetermined load W is applied to the upper surface of the central portion of the housing 1. Then, the CPU 21 which inputs this information through the input interface 23
Outputs a drive command signal to the drive source 24 to rotate the shaft 4. Further, since the housing 1 which receives the load W moves slightly downward, the push plate 18 also moves in the same direction as this and loads the load cell 17. The measured value due to this load is sent to the CPU via the input interface 23.
21, and the CPU 21 processes and outputs a display command signal to the display device 27. Therefore, this measured value (friction coefficient) is the value μ ₂ shown in A of FIG.
Becomes When the work switch 25 and the measurement switch 26 are turned “OFF” after a predetermined time, this information is input.
The PU 21 drives the drive source 2 via the output interface 28.
4 and the work stop signal to the display device 27 are output,
In connection with this, the shaft 4 stops rotating and the display device 27 stops displaying work. Further, the load W applied to the housing 1 is released.

Next, the bearing 3 is provided at a predetermined position, and then the shaft 4 is penetrated through the bearing 3 and both oil seals 6. Then, the work switch 25 and the measurement switch 26 are turned “ON”.
In addition, the same load W as above is applied to the upper surface of the central portion of the housing 1 again. Then, the CPU 21 inputs these pieces of information, outputs a drive command signal to the drive source 24, and outputs the drive signal to the axis 4
To rotate. Further, since the CPU 21 outputs a drive command signal to the pump 14 via the output interface 28, the pump 14 is driven to send the liquid contained in the tank 15 to each supply pipe 13 and then to the space from the pipe 10. Supply to part 2. Then, the liquid sent into the space portion 2 passes through the passage 12 and enters another space portion 2 and the rear pipe 11.
It is returned to the tank 15 through the return pipe 16. Hereinafter, the same work is repeated. In this case, the bearing 3 is immersed in the liquid.

Further, in relation to the load W on the housing 1, the push plate 18 moves downward and applies a load to the load cell 17. The measured value by this load is the input interface 2
It is taken into CPU21 via 3, and CPU21 processes and outputs a display signal to the display device 27. Therefore, this measured value (friction coefficient) becomes the value u ₁ shown in B of FIG. 4 over time. The CPU calculates the friction coefficient u ₀ of the bearing 3 from the value u ₁ and the value u ₂ . (U ₀ = u
₁ -u _2). When the displacement gauge 20 is displaced by the receiving body 19 during this work, the displacement data is input to the input interface.
Taken into the CPU 21 via the face 23,
21 processes and outputs a wear amount display command signal to the display device 27. After that, when the preset time is reached, the work switch 25 and the measurement switch 26 are set to “OF”.
Set to "F" to finish the work.

Since the liquid is circulated between the space 2 and the tank 15 as described above, it is not necessary to immerse the entire device in the liquid, and the bearing 3 can be easily reassembled and inspected. Since the volume of the space 2 in the housing is small, the amount of liquid may be small. Further, the seal case 7 can be easily removed from the housing 1 by tightening and tightening the screw 8, so that the liquid can be easily removed and the bearing can be easily replaced.

[Brief description of drawings]

FIG. 1 is a front sectional view.

FIG. 2 is a side sectional view.

FIG. 3 is a block circuit.

FIG. 4 is a diagram showing measurement data.

[Explanation of symbols]

 1 Housing 2 Space 3 Bearing 4 Shaft

Claims (1)

[Claims] 1. A bearing test apparatus comprising a housing 1 having a space 2 capable of storing a liquid therein, and a bearing 3 provided in the space 2 having a rotatable shaft 4 inserted therethrough.