RU20953U1 - OIL CAP - Google Patents

Abstract

OIL CAP

The utility model relates to engine building, in particular, to reciprocating internal combustion engines (ICE), and can be used in the development of oil-reflecting caps that protect the ICE working chambers from oil from the engine lubrication system.

Such caps are worn on the end of the valve stem guide. The valve closes the hole in the working chamber, in which the piston moves and fuels are burned. The objective of the proposed solution is to improve the quality and durability of the cap by increasing its sealing properties.

To solve the problem, an oil scraper cap containing a housing in the cylinder lance with a narrowed upper part, in which a circular groove is made on the outside of the 1st side, structural changes are made. The cap case is provided with an additional circular groove, which is made on the outer surface of the cylindrical part, the inner surface of the narrowed part of the body has an arcuate shape, and the inner surface of the cylindrical part is provided with a protrusion, a wire spring is mounted in the upper groove, and a split ring is fixed in the lower groove.

In addition, the cut line of the colide is inclined to the axis of the ring, and the cap body is made of fluoroplastic.

3 pf, 2 ill.

R E F E F A T

Description

OIL CAP

The utility model relates to jigging, in particular, to reciprocating internal combustion engines (ICE), and can be used in the development of oil-reflecting caps that protect the working chambers of the engine from oil from the engine lubrication system.

Such caps are worn on the end of the valve stem guide. The valve closes the hole in the working chamber, in which the piston moves and burns fuel. The hole opens when the gas-gas mixture is inlet into the chamber and the products of fuel combustion are released from it. Next to the working chamber there is a chamber with oil, which is intended for lubrication of mechanisms and engine cooling. Through the gap between the guide and the valve stem moving inside the guide, oil can enter the working chamber, which impairs the operation of the engine. To eliminate this drawback, valves are used that are designed to cover this gap between the guide and the valve stem.

Various cap designs are known. So in the patent of the Russian Federation for the invention No. 2073097 from 04/09/93, a cap with a seal in the form of a tape spring is shown.

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IPC: F 16 N, 31/02 F16 J, 09/20

In the patent of the Russian Federation for invention No. 2150588 dated 06/10/2000, another embodiment of the cap is shown - in the form of a sealing ring.

The closest solution to the proposed one can be considered a valve stem cap, developed in 1995 by the Volga Motors ОЛО (copy of assembly drawing 417.1007014 is attached).

The cap is a cylindrical ring with a narrowed upper part. The lower cylindrical part of the ring with interference fit is put on the end of the guide, the upper narrowed part is in contact with the valve stem. The ring is made of rubber. 13 inside the rubber ring in its cylindrical part, a reinforcing ring of metal tape is embedded. An outer groove is made in the upper narrowed part of the body of the rubber ring, in which a twisted ring spring is placed. The inner surface of the narrowed part of the cap facing the rod has a broken shape with a sharp edge, which should provide tight contact with the pin.

In the process of engine operation, the fuel combustion chamber is heated, and the valve stem and cap in contact with it are also heated. In this case, the rubber of the cap softens, increases its size and loses its sealing properties. The reinforcing ring and spring stabilize the position of the cap, ensuring tight contact with the stem. However, the rubber of the cap ages and hardens over time, which leads to loss of elasticity, cracks and destruction of the cap.

The objective of the proposed solution is to improve the quality and durability of the cap by increasing its sealing properties.

To solve the problem in the valve stem cap containing a cylinder-shaped body with a narrowed upper part, in which the outside is made

circular groove, design changes. The cap body is equipped with an additional circular groove, which is made on the outer surface of the cylindrical part, the inner surface of the narrowed part of the body has an arcuate shape, and in the morning, the first surface of the cylindrical part is provided with a protrusion, a wire spring is mounted in the upper groove, and a split ring is fixed in the lower groove.

In addition, the ring cut line is made inclined to the axis of the ring, and the cap body is made of fluoroplastic.

This design is to; the cap is more resistant to high temperatures and can retain its sealing properties.

The proposed design is shown in the drawings:

FIG. 1 section of the front view.

FIG. 2 is a section view AA of FIG. 1.

The proposed cap contains (Fig. 1) the housing 1, which has the form of a cylinder, narrowed in the upper part. The body is made of fluoroplastic, which, compared with rubber, can better withstand high temperature. To further increase the reliability of the cap under operating conditions, the housing is equipped with sealing parts.

In the upper narrowed part from the outside, a circular groove 2 is made, in which a wire spring 3 is placed, in this case more than 2 rows. In the lower cylindrical part, also from the outside, a second circular groove 4 is made, in which a metal split ring 5 is placed (Figs. 1 and 2). Moreover, the cut of the ring is made along the oblique line 6 (figure 2), i.e. with an inclination relative to the axis of the ring.

On the inside, the upper part of the body has an arcuate shape 7, and the cylindrical part is made with a protrusion 8.

The cap with an interference fit is worn with its cylindrical part on the end of the guide 9, while the protrusion 8 fits snugly against the outer surface of the guide. The narrowed part of the cap with its curved surface also tightly contacts the valve stem 10, which moves inside this guide. 1 Thus, the gap between the guide and the valve stem is blocked, which is necessary to prevent oil from entering the working chamber.

During operation of the engine, the temperature surrounding the cap rises sharply, which affects the material of the cap body, which softens and expands, but the presence of rigid rings 3 and 5 creates a voltage that compensates for this temperature expansion and keeps the cap in its original position. The implementation of the spring 3 with open ends, and the ring 5 split provides some freedom to increase the volume of the housing, which eliminates overload and increases the reliability of the cap.

In the proposed cap used material that is less exposed to temperature than the material of the prototype cap.

The parts of the cap are easy to manufacture, technologically advanced to assemble, which allows to increase its quality characteristics without increasing the cost of production.

The proposed design can be widely used in two.

Claims (3)

1. Oil scraper cap comprising a cylinder-shaped housing with a narrowed upper part, in which a circular groove is made on the outside, characterized in that the housing is provided with an additional circular groove, which is made on the outer surface of the cylindrical part, the inner surface of the narrowed part of the body has an arcuate shape and the inner surface of the cylindrical part is provided with a protrusion, a wire spring is mounted in the upper groove, and a split ring is fixed in the lower groove.  2. Oil scraper cap according to claim 1, characterized in that the cut line of the ring is made inclined to the axis of the ring. 3. Oil scraper cap according to paragraphs. 1 and 2, characterized in that the cap body is made of fluoroplastic.