SU1647247A1 - Device for inspection of piston ring geometrical parameters - Google Patents

Abstract

The invention relates to a measurement technique and can be used to control the geometrical parameters of the piston rings of internal combustion engines. The purpose of the invention is to increase the productivity of the control by reducing the scanning time of the object and increasing the information content of the control by controlling the heat lock of the piston ring. Ring 21 is installed in caliber 11. Using branched light guide 1, radiation from high-frequency source 5 and continuous source 4 hits different parts of rotating fiber 7, which scans ring 21 in fixed caliber 11. Using synchronously rotating light guide 8 passing through radial clearance and thermal lock radiation is separately fed to different parts of the branched light guide 12, for each branch 13 and 14 of which the photodetectors 15 and 16 are installed. 1 z. p. f-ly, 9 ill. & fe

Description

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The invention relates to a measurement technique and can be used to control the geometrical parameters of the piston rings of internal combustion engines.

The purpose of the invention is to increase the monitoring performance by reducing the time to scan an object and expanding its capabilities by additionally measuring the value of the thermal lock of the piston ring.

Figure 1 is a schematic diagram of a device for monitoring the geometrical parameters of piston rings; figure 2 is an opaque mask and reading device; on fig.Z - registration scheme of the radial clearance; 4-6, various cases of making a heat lock; Figures 7–9 are the corresponding types of photodetector signals in FIG. 4b.

The device (Fig. 1) contains an illumination system made in the form of a ramified cylindrical

fiber optic light guide 1, in which one output 2 of fibers is designed to illuminate the peripheral zone of the output end of the light guide, and the second output 3 - to illuminate the central part of the output end of the light guide, LED 4, installed before output 2 of the fiber, high-frequency LED 5, installed before outputting 3 fibers, and an opaque mask 6 with three calibrated openings a, b, c, an optical system made in the form of a transmitting 7 and receiving 8 light guide, installed rotatably in supports 9 and 10 respectively This means that the input end of the transmitting light guide 7 is centered relative to the output end of the light guide 1, the output end is centered relative to the input end of the receiving light guide 8, caliber 11, designed to install a piston ring in it and installed in the gap between the transmitting light guide 7 and the receiving light guide 8 such the way that the axis of the gauge coincides with the axis of rotation of the optical fibers 7 and 8, the photo-receiving part, made in the form of a rigid branched cylindrical fiber-optic light guide 12, is located In such a way that its input end is centered relative to the output end of the receiving light guide 8, and directly behind the leads 13 and 14 of the light guide 12 are installed the photoreceivers 15 and 16 and an electrical unit (not shown) electrically connected to the photodetectors 15 and 16. The device also contains readout device made in the form of a transparent

the disk 17 mounted on the input end of the transmitting light guide 7, the illuminator 18, the lens 19 and the photodetector 20.

The device works as follows.

A piston ring 21 is installed into a caliber 11 and is driven into rotational motion around an axis coinciding with the axis of the caliber, transmitting 7 and receiving

0 light guides. The radiation from LEDs 4 and 5 at conclusions 2 and 3, respectively, of the light guide 1 illuminates the mask 6. The radiation from LED 4 passes a calibrated diaphragm c (Fig. 2) and illuminates the radial gap between the caliber 11 and the piston ring through the peripheral part of the light 5 and 7 21, along the peripheral part of the light guide 8 and through the output 13 of the light guide 12, enters the photodetector 15, the electronic unit processes the electrical signal coming from the photoreceiver 15, and calculates the radial clearance value that determines the size of the piston ring. The radiation from LED 5 passes through a calibrated

5 of the diaphragm a and b in the mask 6 (FIG. 2) and through the central part of the light guide 7 illuminates the surface of the piston ring 21 (FIG. 3). At the time of the intersection of the radiation of the thermal lock of the photodetector 15 produces

0 high frequency electrical signal. If the thermal lock has a regular rectangular shape, then two equal bursts of pulses enter the electronic unit; otherwise, the signal type changes

Claims (2)

5 (figure 4). After processing the electrical signals of the photodetectors 15 and 16 and turning the light guide system through 360 °, the electronic unit issues a command about the suitability of part 21 in two ways — the size of the radial gap and the shape of the heat lock. Claim 1. Device for controlling geometric parameters of piston rings in caliber, containing in series 5 installed lighting system, optical system, gauge, designed to accommodate a piston ring in it, a photoreceiver part and an electronic unit, characterized in that 0 increasing the productivity of monitoring and expanding information content by further measuring the magnitude of the thermal lock of the piston ring, the lighting system is designed as 5 of a rigid cylindrical fiber-optic light guide with separate fiber leads from the central part and from the peripheral annular zone of the light guide and two light sources located at each output, the light source located at the output from the central part of the optical fiber is made as a high-frequency pulsed source, and the light source located at the output from the peripheral annular zone of the light guide is made in the form of a continuous light source, the optical system is made in the form of a transmitting and receiving fiber optical-optical light guides mounted for rotation around the axis of the gauge so that the input end of the transmitting and output end of the receiving optical fiber light guides are installed on the axis of rotation, and their other ends are designed for optical interaction during the control through the gap between the caliber and the piston ring , and an opaque mask with three calibrated diaphragms, one of which is made rectangular and located on the peripheral part of the input end of the transmitting light guide, and the other two the diaphragms are made in the form of narrow slits located in the central part of the input end of the transmitting light guide on opposite sides of its axis; the photodetector part is made in the form of a rigid cylindrical FIG. 2 fiber optic fiber with separate fiber leads from the central part and from the peripheral annular zone of the fiber, each of which has a photodetector, and the input end part is centered relative to the output end of the optical fiber of the optical system, 2. The device is pop, 1, characterized by the fact that, in order to improve the measurement accuracy by registering the angle of rotation of the optical system, it is equipped with a counting device made in the form of a glass disk mounted on the input end of a transmitting optical fiber with an opaque coating on one of its sides, on which thin transparent radially oriented strokes are applied around the circumference, with a lighting system made in the form of a light source and a lens mounted on one side of the disk, and a photo sensor nick mounted on the other side of the disc and is electrically associated with the electronic unit. mmjuuiMMM Fig.Z FogL (Pt / z7 , 0 „a t Phage.8 ®fc5 fDt / gb FIG. 9