SU958666A1 - I.c. engine lubrication system - Google Patents

Description

(54) LUBRICATION SYSTEM OF INTERNAL COMBUSTION ENGINE CYLINDER

The invention relates to mechanical engineering and is intended primarily for the lubrication of the cylinders of marine diesel engines of high power.

A cylinder lubrication system for an internal combustion engine is known, comprising a plunger pump, a discharge pipe, an accumulator and an oil supply nozzle, in the body of which a non-return valve is located, and the oil on the battery cavity is connected to the discharge pipe connecting the pump with nozzle 1.

In the well-known system, during the pumping stroke of the pump lunar, the battery, due to its elastic properties, acts as a compensator and accumulator, reducing the oil pressure in the system, bringing it to a constant value.

The elastic properties of the accumulator are chosen on the basis of the pressure created by the oil in the discharge pipe; exceeding the back pressure by no more than tenths of the atmosphere, i.e. between the oil pressure in the discharge pipe on the one hand, and the sum of the boost pressure with force, tightening the choke check valve spring on the other, when the engine is running, a condition close to equilibrium, which can be represented as

+ RP,

 n cl pr

where P is the oil pressure in the battery;

M

CL - hole area, lockable

check valve choke; PH-pressure charge air; - force of tightening of the spring of the check valve of the union. However, when the engine is stopped, the battery is quickly drained.

Claims (4)

The amount of oil that is injected, 5 plugs once per 7-15 revolutions, is known to be only a few drops for existing engines, and for technological reasons, the dimensions of the battery cavity are ten times larger than the portions supplied to it. . Therefore, subsequent after start-up, engine operation with a depleted battery for tens and even hundreds of revolutions necessary to fill the battery occurs without oil flowing into the cylinder. This disadvantage becomes especially dangerous in the absence of frequent stopping and starting of the engine, for example during maneuvers, when emptying the battery can follow practically one after another, disrupting the efficiency of the lubrication system. The aim of the invention is to increase the efficiency of the lubrication system. This goal is achieved by the fact that the system additionally contains a shut-off-throttle body, which is installed between the small cavity of the battery and the choke check valve. Moreover, the shut-off throttle body is made in the form of a spring-loaded non-return valve with a device for regulating the spring tension and the valve opening limiter. To reduce the number of joints in the system and improve its arrangement, the throttle and throttle body is installed in the battery case on the oil exit side or in the union case in front of its reverse clan, on the oil inlet side. FIG. 1 is a schematic diagram of the proposed system with a locking / throttling device placed between the accumulator and the choke check valve; in fig. 2 - the same, placed in the battery. The lubrication system of the cylinder contains a plunger pump 1, an oil supply fitting 2 in the body of which a check valve 3 is placed, a discharge pipe 4, an accumulator 5, the oil on the cavity of the accumulator 5 communicating with the discharge pipeline 4, connecting a pump 1 with a fitting 2. Between an elastic wall 6 of the battery 5 and a check valve 3 have a shut-off throttle body 7, a check valve 8 which is loaded with a spring 9 and is placed together with it in the housing 10. To adjust the tension of the spring 9, a pressure washer 11 is provided screwed In the case 10. The opening value of the valve 8 is controlled by a stop 12 screwed into the washer 11, which has oil holes 13. The locking-throttle body 7 is installed in the fitting body in front of the non-return valve on the oil inlet side (not shown), or the battery housing on the oil outlet side (Fig. 2). This arrangement of the valve throttle body improves the layout of the system. The system works as follows. The spring 9 is loaded by means of a pressure washer 11 to the force P: + 1 f, at which the locking-throttle body opens. With this setting, the battery is maintained in a filled state and constantly ready for operation. Moreover, the section of the discharge path with the battery, enclosed between the pump 1 and the shut-off throttle body 7, is under a higher pressure than the section between the body 7 and the valve 3 of the choke 2. Therefore, at the first injection of oil by the pump 1, the pressure in the battery 5 becomes higher than the spring tightening force 9 and the locking-throttle body opens slightly, which leads to an increase in pressure in front of the check valve 3 of the nozzle and the subsequent supply of oil to the cylinder. The supply occurs in any case, including immediately after the engine start-up, especially since during the first turns after the start-up, the boost pressure does not have time to reach its highest value, corresponding to the specified mode. Thus, the installation of the shut-off throttle body between the battery and the choke check valve, as well as the specified setting, results in the separation of the discharge path of the system into two sections with different pressures; with a higher one - in the battery and with a lower one - before the check valve of the choke. This eliminates emptying the battery when the engine is stopped and provides oil to the cylinder almost immediately with its start. In addition, the output of oil through the strangulated section of the locking-throttle device increases the uniformity of the served portions by turns. As shown by operational tests, the proposed system improves the organization of cylinder lubrication, reduces wear on its parts, and improves reliability and technical and economic performance of the engine. Claim 1. Lubrication system of a cylinder of an internal combustion engine, comprising a plunger pump, a discharge pipe, an accumulator and an oil supply nozzle, in the body of which a check valve is placed, and the oil on the battery cavity is connected to the discharge pipe connecting the pump with the nozzle that distinguishes so that, in order to increase the efficiency of the lubrication system, the system additionally contains a shut-off throttle body installed between the battery oil cavity and the check valve fitting. 2. A system according to claim I, characterized in that the shut-off throttle body is made in the form of a spring-loaded non-return valve with a device for regulating the spring tension and the valve opening limiter. 3. The system of PP. I and 2, characterized in that the locking-throttle body is installed in the body of the battery on the oil exit side. 4. The system of PP. 1 and 2, characterized in that the locking-throttle body is installed in the body of the nozzle in front of the non-return valve from the oil inlet side. Sources of information taken into account in the examination 1. Application of Japan No. 47-10127, cl. 51J 221, publ. 1972.