SU1418534A1 - Piston for hermetically-sealed compressors for compressing refrigerants - Google Patents

Abstract

The invention relates to piston structures with a ball head between the connecting rod and the piston and allows for a reduction in the temperature effect on the mobility of the hinge. The body (K) of a piston and a rod 2 are connected between each other by a ball bearing made in the form of K 3 and a ball 4 rigidly connected to the rod 2. 2. The K 3 is rigidly connected to K 1 and contains the flanged part 5. Between last and the ball is set elastic ring 6 made of synthetic material. In part 5 K 3 on the side of the ring 6, the depressions 7 are made. The presence of the latter makes it possible to compensate for the thermal expansion of the ring by filling the depressions with the material of the ring and thereby saving the ball's mobility to K 3. 1 sludge.

Description

(L

00 SP

with

four

The invention relates to a compressor with a groove, in particular to a piston with a hinge in the form of a ball head between a connecting rod: an ohm and a piston.

 A piston device with a ball is known: a ball in the form of a w & head located between the connecting rod and the piston, in which the ball is directly adjacent to approximately a hemispherical cushion made of antifriction metal, especially bearing bronze. The shodushka contains a protrusion that has a larger diameter compared to the ball, and on the inner side there is a layer of elastically removable material, mostly cut fluorinated polyethylene (PDR patent L 65714, cl. F 16 J 1/22, - 1967). I The disadvantage of such a piston is its relatively high cost of service. In addition, the elastic material layer also has a relatively small thickness and this causes a slight compensation of the dead passage between the ball and the pillow .. Fluorinated polyethylene with: | various temperature effects and atmospheric - they are celebrated in a hermetic compressor for the life of a refrigerant; they can change their properties without changing the conditions of pairing due to changes in the gap. In order to eliminate this drawback, the Lpapa socket was made with the possibility of intensive cooling of the oil circulating in the hermetic compressor in order to predict a change in the properties of polyethylene by exposure to heat. In practice, it turned out that the elimination of deficiencies) i such structures is impossible. ; The purpose of the invention is to reduce the temperature effects.

 The goal is achieved by creating a piston with a hinge in the form of a ball head, the ball being placed in a casing with a ring of synthetic material installed in it, which is in turn flanged. The shell in the flanged part contains cavities. Due to this, the change in the volume of the ring made of synthetic material, which occurs under the influence of the temperature and refrigerant on it, does not cause a change in the gap in

the proposed hinge and thus retains the hinge mobility.

The drawing shows the proposed piston, a longitudinal section.

Porschen for hermetic compressors for compressing the refrigerant includes a housing 1 and a rod 2, interconnected by a ball bearing, made in the form of a housing 3 of a ball bearing rigidly connected to the housing 1 of the piston, and a ball 4, rigidly

associated with the rod 2, while the body 3 of the ball bearing contains the flanged portion 5, between which and the ball is installed a uniform ring 6 of synthetic material. In the flanged part 5 of the case

3 ball bearings on the side of the elastic ring made of synthetic material are made in the recess 7.

During work, the force of movement from the rod 2 through the ball 4 and the body 3 of the ball lugs gives the piston body 1 a reciprocating motion. At this m, due to the warm-up effects, the volume of the elastic ring 6 made of synthetic material increases relatively, which affects the mobility of the ball 4 in the body 3.

ball bearing. However, the presence of recesses 7 in the flanged part 5 of the ball support housing 3 makes it possible to compensate for the thermal expansion of the ring 6 due to the filling of the recesses 7 with the material of the ring 6 and, thus, maintain the same mobility of the ball 4 in the housing 3.

Claims (1)

Invention Formula five A piston for hermetic compressors for compressing a refrigerant comprising a housing and a stem connected to each other by a ball bearing made in the form of a ball housing rigidly connected to the piston body and a ball rigidly connected to the rod, in which case the ball - The support includes a flanged part, between which and the ball there is an elastic ring made of synthetic material, differing in m. That, in order to reduce temperature effects, in the flanged part of the body of the ball joint from the side of the elastic ring who .Material recesses.