SU58051A1 - Instrument for tested piston ring elasticity - Google Patents

Description

To test the elasticity of the piston rings, it is already known to use devices in which the ring is covered by a tape, one end of which is attached to the moving part, creating a load, and the other to the recording body.

According to the invention, in order to adjust the device for a movable load-generating organ, an adjustable stop is provided, and a console plate is applied as a dynamometer, to the end of which an indicator is connected. Such a device makes it possible to adjust the device on the reference ring in such a way that the ring, the elasticity of which is measured, will have at the time of measurement an outer diameter equal to the inner diameter of the cylinder sleeve of the motor.

In the drawing of FIG. 1, the device shows a top view and FIG. 2 is a section along the line AB in FIG. one.

The elasticity measurement is made by covering the test ring with flexible tape 14. At the crossing of the ends of the tape, an inner rectangular slot is made at one end through which the other end of the tape, tapered at this point, is passed.

One end of the tape 14 is attached to the movable member 5 in the form of a sector, rotating on an axis 15 and connected to the lever 6, which rests in the extreme retracted position against the stop 11.

The other end of the lectas is attached to the plate 22, which on one side is fixed between the strips 2 and 18 attached to the base of the device, the indicator leg 33 is led to the free end of the plate 22.

The device is tuned to the reference piston rings so that when lever 6 is brought to the stop, the inserted reference ring has an outer diameter equal to the inner diameter of the cylinder liner of the motor or the required clearance in the joint in a compressed form.

The elasticity of the compressed piston ring is transferred to the plate 22, the bending of which is recorded by the indicator. The test ring is placed on table 3, which has an outer diameter less than the outer diameter of the compressed piston ring. Table 3 can be raised and lowered to position the piston ring exactly in the middle of the flexible belt. This is done to adjust the instrument to different thickness of the piston rings. The bending tape is resting on the ledges of the pins 21 and 20. When the lever 6 is retracted from the stop // the bending tape diverges to the sides, resting against the pins 21 and 20, which facilitates the shooting and the tab of the rings.

As can be seen from the foregoing, the device is based on the application of Hooke's law in relation to the use of bending in a seamed plate 22 to judge the elastic force of the test ring, compressed with a tape acting on plate 22. An accurate measurement of the bend in plate 22 is made by the indicator.

The ring measured for elasticity will always have an outer diameter equal to the inner diameter of the cylinder liner of the motor cylinder at the time of measurement, since this was due to the adjustment of the device on the reference ring while bringing lever 6 to the stop 11. Thus, this very important factor in measurement is achieved by itself and the attention of the worker making the control of the rings should be directed only to reading on a scale of indications of indications proportional to the magnitude of elasticity. In order to clarify this, it should be borne in mind that when measuring, a scale is read on the scale of the indicator, proportional to the magnitude of the deviation of the elasticity of the test ring from the elasticity of this first ring. This deviation of elasticity causes a very insignificant change in the amount of bending of the plate 22 at the point of attachment of the tape 14. However, this change in bending will be captured with sufficient accuracy by such a sensitive device as an indicator; moreover, the deflection is measured at the free end of the plate 22, where the deflection is of course the greatest.

Measurement errors resulting from the individual characteristics of the control worker are minimized. So, for example, the different force of the clamping of the lever 6 to the stop 11 does not reflect on the readings of the indicator arrow, since the tape 14 is closer to the axis of rotation of the lever 6 than the stop //.

The subject matter of the invention.

A device for checking the elasticity of piston rings using a tape that covers the end, attached at one end to the moving body creating the load, and the other to the recording device, characterized in that, in order to adjust the device for the moving body b creating the load, an adjustable the stop //, and a cantilever plate 22, acting as a free end on the indicator, was used as a dynamometer.

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