SU1227837A1 - Connecting rod - Google Patents

Description

2, Connecting rod pop, 1eOtich icha. u and u with TP-Mj that the tool of the center of masses of the mass is a series of holes J made in the rod and shifted relative to its longitudinal O. SI.

3 "Connecting rod according to claim 1, distinguishing between u and with the fact that the means for displacing the center of mass is inserted as

one

The invention relates to a machine ™ structure and can be used in crank mechanisms of high - speed internal combustion engines of compressors in pumps.

Known connecting rod crank mechanism containing a piston and a crown head connecting them hard rod and bolts, bolted to the crank head. In the recess of the rod of the connecting rod is placed a counterweight with the possibility of moving it along the axis of the connecting rod.

This makes it possible to change the position of the center of mass (CM) of the connecting rod to reduce the normal force from the impact of the piston on the cylinder sleeve of the piston machine and, as a result, reduce the vibratory activity of the mechanism.

The known connecting rod does not sufficiently reduce the vibratory activity of the mechanism, since for realization it is necessary to significantly increase the weight of the connecting rod, which leads to an increase in its dimensions.

The disadvantage of the well-known connecting rod is the intensive wear of the parts of the mechanism p, which reduces the resource: the engine.

The purpose of the invention is to reduce vibroactivity and increase the life of the k-bearing mechanism.

The goal is achieved by the fact that the crank of the crank mechanism, which contains a piston and a crank head, a rigid rod connecting them, and a cover bolted to the red head, is equipped with a means for shifting the center of mass of the connecting rod relative to its longitudinal axis.

prc-dava on the crank cover

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4 Connecting rod ROftol is a different ten that means of displacement | deitra t ' scc is produced in the form of a bolt with a nut, the mass of which is greater than S is the mass of another crank with a nut

Means snesh: K5-m mass center is a series of holes that are located in aggok biased relative; 5: its longitudinal axis,

In addition to TorOj, this tool can be carried out in the tide on the lid of a curved shaft or in the form of a connecting rod bolt with a nut 5 which has a mass. ryh more ,, than the mass of another connecting rod bolt with nut.

In Fig. 1, the “cewa cree of a bush-and-pinch mechankzk” with the offer “11N crank; on - connecting rod with holes E stock | in fig 3

connecting rod with w “kpfcSBKei to w. gatun with bolt and nut” by using the mass of fig, 5, augmenting the holes of the force of force P in the absence of a shift, the center of mass of the connecting rod relative to its longitudinal axis; Fig. 6 shows the occurrence of a normal force P when the center of the nuss is displaced relative to the axis when the crank angle ci is shifted relative to the upper dead

points; This is the occurrence of a norm of force P, (, when the center of mass is displaced from the rod axis when the crank is in dead center.

The crank mechanism (fig1) contains piston 1, crank pin 2j connecting rod 3, Rod 3 contains (fig 2) piston 4 and crank 5 heads and connecting rod 6, Head 5 contains upper part 7 and key 8,

In the rod 6 of the connecting rod 3, holes 9 are made, displacing the center of mass from the longitudinal axis.

The tool that provides the shift of the center of mass is made in the form prili31227837

VA 10 on the cover 6 of the head of the Krivatshpy head 5 (FIG. 3).

According to the position indicated in FIG. 4, the connecting rod 8 of the connecting rod 3 is attached to the upper part 7 of the head 5 by connecting rod bolts 11 and 12 with nut 13 and 14. The connecting rod mass of bolt 11 with nut 13 is greater than the weight of connecting rod bolt 12 with nut 14, The connecting rod bolt 11c with the nut 13 is not only a fastener, but is a means of displacing the center of mass,

Under the action of pressure Pp, a force Pn arises on the piston (FIG. 3) near the top dead center (TDC), normal to the center of the piston cylinder,

In a crank-drive mechanism with a connecting rod having a center of mass displaced relative to its axis (FIG. 6), a force of inertia P arises, which creates a moment with arm L relative to point A.

This moment turns the crank in the direction of the clockwise movement. It determines the force P acting

Rd Besle

5 cs new wife to mackin lingdus ts pro

feet uro. kav

opposite the power of P

As a result of this, near TDC, the cylinder tulku acts -P ,,,

With further movement of the piston to the MT, the inertia force Pn increases, f arises, and the difference

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giving a slave t x 25 mind wood or 30 mouth

tel

Rd PH ® position of the piston in the TDC of the BMP, P ,, is maximum, and Р ,, decreases to. zero

The piston transfer (Fig. 6) begins with such an angular displacement of the cc of crank 2, when the force PH becomes greater than Р, т, е, until the piston reaches the BHT position at working pressure not reaching the maximum value. Therefore, the impact energy of the piston against the wall of the cylinder liner is less than in the case when the center of mass of the connecting rod is not displaced and the piston is relocated. TDC position

An increase in the initially given shoulder LJ contributes to a reduction in the level of vibrations, as well as to a reduction in the cavitational damage to the surfaces of the notch space.

Repositioning the piston at low pressures of the working medium reduces the work of friction on the end surfaces of the piston rings, and thereby reduces wear on these surfaces. The shift of the center of mass of the connecting rod is advisable in non-reversible machines or in reversing machines operating in reverse gear at low revs.

Reducing vibrational activity allows engines to increase their life and reduce noise.

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Compiled by A, Tarkovsky Editor A.Dolinich Tehred V, Kadar Proofreader I.Erdeyi

Order 2274/36. Circulation 777 Subscription

VNIIPI State Committee; 1teta USSR

On affairs of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., D. 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (4)

1. A connecting rod of a crank mechanism, comprising a piston and crank head, connecting their rigid rod and a cap bolted to the crank head, characterized in that, in order to reduce vibration activity and increase the resource, the connecting rod is equipped with a means for displacing the center of mass relative to its longitudinal axis . § (L s m 00 health ’FIG. 1 2. A connecting rod on π, ί, about l and h and u ~. and the fact that the means of displacing the center of mass is a series of holes made in the rod and offset relative to its longitudinal o.s. 3 "A connecting rod according to claim 1, characterized in that the means of displacing the center of mass is made in wad of tide on the lid of the crank head" 4 "Connecting rod according to claim 1, characterized in that the center of mass ₉ displacement means is configured as a connecting rod e bolt with a nut, which is greater mass than the mass of the other connecting rod bolt. with a nut.