JPH0334678Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a friction test device used to simply measure the friction coefficient of a sample piece such as a seal ring or a mating ring incorporated into a mechanical seal. It is something.

[Prior Art] Currently, no device has been developed that can easily and quantitatively measure the coefficient of friction of a sealing member such as a seal ring or a mating ring incorporated into a mechanical seal. It is.

[Problem to be solved by the invention] Therefore, the inventor focused on the fact that it is possible to qualitatively sense the magnitude of frictional force when two objects are slid by hand, etc., and proposed the invention. This is what I came to do.

[Purpose of the invention] An object of the invention is to provide a simple friction testing device that can quantitatively measure the friction coefficient of a sample piece.

[Means for solving the problems] In order to solve the above problems, the present invention has the following features:
A base, a sensor for measuring vertical load, a sensor for measuring frictional force in the X direction, and a sensor installed on the base,
A force meter with an integrated three-dimensional strain section equipped with a three-dimensional sensor consisting of a sensor for measuring directional frictional force, a sample mount installed at the upper end of this force meter, and this sample mount. Simultaneously indicates the vertical load detection value and the friction force detection value in the X-Y direction from the three-dimensional sensor using the sliding position data of the movable sample piece when the movable sample piece is pressed and slid on the fixed sample piece fixed to the and a calculator for calculating the coefficient of friction.

[Function] That is, the present invention has the above-mentioned configuration, so that the movable sample piece is pressed by hand or the like and slid onto the fixed sample piece fixed on the sample mount, and the vertical load and the X-Y direction are applied. A three-dimensional sensor attached to a force meter detects the frictional force of Since the friction coefficient is calculated by specifying the detected value of the friction force in the It becomes possible to easily and immediately detect the friction coefficient of

[Embodiment] The present invention will be described below with reference to an illustrated embodiment.

As shown in FIG. 1, numeral 1 in the figure is the main body of a friction testing apparatus according to the present invention. This device main body 1 is made up of a force meter 3 installed on a base 2.
consists of a supporting leg part 4 and a strut part 5, with horizontal holes 6, 6 in a local part of the supporting leg part 4, and a horizontal hole 7 in a local part of the supporting leg part 5.
and 8 are locally thin-walled so as to reduce the rigidity in the direction of receiving force, and a first strain gauge 9, which serves as a vertical load measurement sensor, is attached to these thin-walled portions as a three-dimensional strain section. 9, a second strain gauge 10 serving as a sensor for measuring friction force in the X direction, and a third strain gauge 11 serving as a sensor for measuring friction force in the Y direction.
These first strain gauges 9, 9, second strain gauge 10, and third strain gauge 11 constitute a three-dimensional sensor. Also, 12 in the figure
is a sample mount installed at the upper end of the support column 5 of the force meter 3.

Then, in the present invention, a fixed sample piece A is fixed on the above-described sample mount 12, and a moving sample piece B is placed on the fixed sample A while applying an appropriate load W by hand.
As shown in FIG. 2, by pressing and sliding in the X and Y directions, the vertical load is detected by the first strain gauges 9, 9, and the frictional force in the X direction is detected by the second strain gauge 10. The third strain meter 11 detects the frictional force in the
strain gauges 9, 9, second strain gauge 10, and third strain gauge 1
The detection signals detected by 1 and 1 are transmitted to distortion amplifier 2.
1, 22, and 23, and simultaneously detect these values as analog or digital quantities to output a vertical load indicator 24 and an X-direction friction force indicator 2.
5 and Y direction friction force indicator 26. At this time, since the vertical load and the frictional force show changes over time, the values are indicated at a certain moment while the moving sample piece B is sliding, for example, when it passes through the center. and,
A calculator 27 is provided in such a circuit, and the friction coefficient (frictional force/vertical load) is calculated and displayed on a display 29 based on appropriate sliding position data 28. Therefore, especially when trying to measure the coefficient of friction of the fixed sample piece A in the X direction and the Y direction, it is possible to measure the coefficient of friction of the fixed sample piece A without having to reinstall the fixed sample piece A each time.

It should be noted that the present invention is not limited to the above embodiments in any way, and it goes without saying that various modifications can be made without changing the gist of the present invention.

[Effects of the invention] As is clear from the above explanation, according to the invention, a movable sample piece is pressed by hand or the like onto a fixed sample piece fixed on a sample mount, and the vertical load and X-Y The directional frictional force is detected by a three-dimensional sensor attached to a force meter, and based on the sliding position data of the moving sample, vertical load is detected when the moving sample passes a certain position on the fixed sample. value and x
- Since the friction coefficient is immediately calculated by a computer by specifying the friction force detection value in the Y direction, measurement data in three-dimensional directions can be obtained with a single force meter with a simple structure. It is extremely convenient for performing friction tests on materials whose coefficient of friction differs depending on the direction of motion, and it has the excellent effect of being able to easily and accurately detect the coefficient of friction of a combination of various sample pieces. It is.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory view of the main parts of an embodiment of the friction testing device according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a block diagram showing the control system. 1... Device body, 2... Base, 3... Force meter, 9
...Vertical load measurement sensor (first strain meter), 1
0... Sensor for measuring frictional force in the X direction, 11...
Sensor for measuring frictional force in the Y direction, 12... Sample mounting stand, A... Fixed sample piece, B... Moving sample piece.

Claims (1)

[Scope of utility model registration request] A three-dimensionally distorted part is provided with a base and a three-dimensional sensor installed on the base and consisting of a sensor for measuring vertical load, a sensor for measuring frictional force in the X direction, and a sensor for measuring frictional force in the Y direction. A force meter formed in one piece, a sample mount installed at the upper end of this force meter, and a moving sample when the moving sample is pressed and slid on the fixed sample fixed to the sample mount. A friction testing device comprising: a calculator that simultaneously indicates a vertical load detection value and an X-Y direction friction force detection value from the three-dimensional sensor using sliding position data to calculate a friction coefficient. .