SU33331A1 - Piston Ring Tester - Google Patents

Description

Piston rings of internal combustion engines are one of the difficult parts to carry out. All satisfactory mechanical properties of the ring (test for hardness, stretching and bending of the specimens) and a certain chemical composition are not characteristic of the elasticity of the ring. Meanwhile, checking the ring for elasticity, t. F. detecting its ability to withstand a load without residual deformation is the most reliable way to control rings, since in the absence of adequate elasticity of the ring during operation, it reduces the size of the cut in the free state, and gives gaps or, by increasing the cutout, overvoltages in operation and break down.

The known method of testing piston rings for elasticity is by putting a ring on a tapered mandrel, which expands the ring to a certain limit, and, after removing the ring from the mandrel, the length of the notch (in the free state) should be the same as it was before putting the ring on the cone . According to another method of testing the rings on. The elasticity is produced by the device, which compresses the colts-dow almost to the touch of the locks, taking into account the pressure on the burner. mm section of the ring.

(3S (,)

Both of these methods are aimed at detecting the elasticity of the ring to certain limits: in the first case, the ring is put on a certain place of the conical mandrel, in the second case, the limit of the ring is the distance between the locks; Meanwhile, it is extremely important to determine the maximum elasticity of the ring (outside certain limits) before the occurrence of residual deformation, which will make it possible to judge both absolute and relative elasticity of the rings of various heats and to make attempts to detect in this way the factors affecting the elasticity of the ring. Significant drawbacks in testing the elasticity of putting on a tapered mandrel is the presence of a large friction between the surface of the mandrel and the edge of the ring and, moreover, when the ring is opened, the conical mandrel tends to deform it from the inside by the angle of the cone. The disadvantage of the second method is, on the one hand, the restriction of the aperture of compressing the ring, and on the other, the study of the elasticity of the ring in only one section diametrically opposite to the cutout of the lock.

The proposed device for testing the elasticity of piston rings, has the most positive aspects - .. iBJ II FIG. 2 /; ff d52r15 v

Date: 03/01/2002

Number of pages: 2

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Class 42k,.

WITH .MTOPCROE CERTIFICATE OF INVENTION

Vicat type for cement testing.

To the author's testimony of A. G. Weingardt, dated June 5, 1932 (cf. on the first. No. 110520).

On the issuance of copyright certificate published 30 November 1933.

The invention relates to a Vicat-type motorized drive for testing cement. In the proposed device, a spring rail is used, which, when acted upon by an eccentric, is used to periodically turn the cam, intended to act on the lever, in order to raise and lower the needle of the instrument.

In FIG. 1 is a side view of the device and FIG. 2, top view

In the Vika type cement tester, cement mold 7 is mounted on a disk 2 fitted with a circumference of a ratchet gear coupled to a spring 4 above the pawl 4 which is coupled to lever 7. A movable part of the device is located above the shape / eccentric test needle; for lifting the part W, the lever // is supported, resting on the disk with the fist / 2, equipped with the ratchet pinion J3, which engages the paw J4, which is under the influence of the eccentric J6; this latter is equipped with a ratchet zubchatka 77, coupled with a dog 75, mating pivotally with a mandrel 26, suspended at 7I

Winding of the tommer 26 is under

(337)

№ 33332

DESCRIPTION

current only at the moments of tantalum approaching koryu 27; This is achieved by the fact that at the time of the vertical position of the tambour, the slider 29 comes off contact 27 or 22 and slides on glass 23 or 24, and, due to the presence in axis 20 of sufficient frictional force, when moving the tv to the right, it slides on movement left-bottom contact. The swinging tartan with the help of the fS pawl informs the rotation of the lower ratchet servo 77. One turn of the cam 76 of the lower ratchet using the rail M transfers the ratchet upper ratchet 75 to one tooth in the direction of the arrow. Spring 75 retracts rail J4 to its previous position.

The free fall of the movable part of the JO occurs at the moments when the lever P comes off from the fist 72, which is given such an outline that before jumping off the lever is slowly lowered until the needle touches the cement. At the same time, a pencil line is held on the roller 9. The beginning and end of the seizure of cement is determined by the length and number of traits carried out. i

At the moments of the upper position