SU1402727A1 - Connecting rod of internal combustion engine - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in internal combustion engines, mainly diesel engines. The goal is to increase the durability and reliability of the connecting rod bearing. In the oil channel 7, the rod of the connecting rod 5 is arranged with a possibility of limited reciprocating movement of the valve 11. The cavity of the oil channel of the rod of the connecting rod between the hammer 11 and the non-return valve 8. communicates through the holes with the working surface of the connecting rod bearing. The cavity of the oil channel between the bearing sleeve 10 of the piston head 9 and the valve is in communication with the atmosphere. The mass of the spool is determined from the calculated dependence. Constructive execution of the connecting rod allows to increase the intensity of lubricant supply to the working area of the connecting rod bearing, thereby increasing its reliability and durability. 1 hp f-ly, 4 ill. i (L S yu |

Description

The invention relates to mechanical engineering and can be used mainly in internal combustion engines.

The aim of the invention is to increase the durability and reliability of the connecting rod bearing

FIG. 1 shows the proposed connecting rod with a lubrication system; Fig. 2 shows a section A-A in Fig. 1 (openings with which the cavity of the oil channel of the connecting rod rod is connected to; the working surface of the connecting rod bearing: slide); in fig. 3 and 4 — node I in FIG. 1 (variants of the design of the plunger and limiting its movement by elastic elements).

- The rod of the internal combustion engine (Fig. 1) consists of a connecting rod 1 with its detachable part 2, with inserts 3 and 4 of the slide bearing thrust bearing, a connecting rod rod 5 with oil channels 6 and 7, one of which has a check valve 8 from a piston head 9 with a bearing sleeve 10 "In the oil channel 7 there is placed a reciprocating moving valve 11,

The oil channel 7 of the rod of the connecting rod 5 (fig ,, 2) communicates through the openings 12-14 with the working surface of the inserts Sha 4 of the connecting rod slide bearing Capillary holes 13 on the bottom 4 are connected by annular cavities of the BA-BaMH 15 g 14 reports the working surface of the cladding. The connection of the hole 12 with the working surface of the insert is duplicated | Aries several times, From the end of the connecting rod Hole 12 is closed with a plug 16,

The restriction of the movement of the spool 11 S oil channel (Fig.Z and 4) can

for example, j in the presented variants: either one elastic element 17 is installed directly in the spool 11, and another element 18 in the rod of the connecting rod (FIG. 3) j or both elastic elements 17 and 18 are installed in the spool 11, The spool 11 itself can be made, for example, monolithic from a single material (fig. 4) or composite, when the outer steel sheath is filled with lead 19, in order to increase its mass. The upper part of the oil channel 7 at the bearing sleeve 10 is limited by a stop, an emphasis 20, and the oil cavity 0

five

about 5 0

five

0

five

0 5

between the spool 11 and the stopper - the stop 20 is connected to the atmosphere through a drainage hole 21, the grooves 22 and 23, respectively, are provided for supplying oil to the lubricant in the detachable part 2 and insertion 3.

The elements of the connecting rod of the internal combustion engine during its movement interact as follows.

During the movement of the piston in the working cylinder, the connecting rod connected to the piston pin, turning on it in the bearing sleeve 10, lowers or rises, depending on the direction of movement of the piston.

As the piston approaches the top dead center, the connecting rod rises. In this case, the inertia force of the spool 11, acting on it in the direction opposite to the direction of acceleration of the center of mass of the connecting rod, according to Newton's second law, carries the spool up to the stop 20,

When the piston approaches the bottom dead center, the inertia force of the spool acting on it in the direction opposite to the acceleration of the center of mass of the connecting rod, which brakes its movement, moves the spool 11 towards the oil channel 7, thereby increasing the pressure of the oil column in the channel, since flow of oil through channel 6 to the side. the bearing is prevented by a check valve 8. Excessive pressure directs a portion of the volume of oil displaced by the spool 11 from channels 7 and 6 into hole 12, and from it through holes 13 enters grooves 15, from which through holes 14 enters the working surface of the upper shell. , 4 slider connecting rod bearing, which increases the amount of lubricant and increases the pressure in the oil layer of the liner working surface, thereby improving the lubrication condition in the connecting rod head 1. To achieve this goal, the spool weight 11 must be according to the following relationship:

4 +

mr-vfr

mo-wc

7m-

w +

-mass spool

- spool diameter

-acceleration of the center, the tin of the spool at the end of the turn;

p is the lubricant pressure in the inlet oil channel of the connecting rod rod, Hc; - mass of lubrication column between

valve and non-return valve - acceleration of the center of the tin

grease column between the valve and the check valve at the end of the connecting rod stroke; g is the acceleration of the force of gravity. Thus, in a 2-stroke diesel engine once, and in a 4-stroke diesel engine twice in one diesel-duty cycle, the bearings receive an additional portion of oil, while increasing the durability and reliability of the connecting rod bearing.

Claims (2)

1. Connecting rod engine internal. combustion, predominantly diesel containing a piston head with under-i hip sleeve, a rod with an oil channel and a connecting rod head with connecting rod slide bearing and an inlet oil channel with a non-return valve located in it, characterized in that, in order to increase durability and reliability by reducing the wear of the connecting rod bearing by intensifying the lubricant supply, it is equipped with a spool located in the oil canape of the rod with The bone of the limited reciprocating movement, the oil cavity of the rod of the connecting rod located between the valve and the check valve is connected through holes to the working surface of the connecting rod bearing, the cavity of the oil channel of the rod between the bearing sleeve of the piston head and the valve is connected to the atmosphere, and the mass of the valve is determined From the following relationship: five 0 five 0 five tFd + mcWc Idl  m w - gw + g where m is the mass of the spool; dj - spool diameter; w - acceleration of the center of gravity spool at the end of the turn; p is the lubricant pressure in the inlet oil channel of the connecting rod; t is the mass of the lubricant column between spool and check valve-, WP - acceleration of the center of the tin plate grease column between the valve and the check valve at the end of the connecting rod stroke; g is the acceleration of the force of gravity. 2. The connecting rod according to Claim 1, about the aylah - yi and the fact that between the interconverted end surfaces of the spool and the cavity in which it is located, elastic elements are installed. Yu 18 Fig.Z Fug, ff