SU1323776A1 - Internal combustion engine unit - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to components of internal combustion engines, and improves its reliability by reducing dynamic loads. The goal is achieved by reducing the number of connecting rods 5 in the four-shaft shaft on the end elbows by half relative to any of the central elbows, and the axes of the end elbows are located in the same plane on one side of the shaft axis. With this crank pattern, the inter-cylinder distance is maintained. All unbalanced forces are halved. The number of main supports and inter-cylinder bulkheads is reduced from four to three. 5 il. (O (L 00 to oo vj O5

Description

 The invention relates to mechanical engineering, in particular to components of internal combustion engines.

The aim of the invention is to increase reliability by reducing dynamic loads during operation.

FIG. 1 shows a node, a general view; in fig. 2 is the same, end view (d is the angle between the planes of the knees); in fig. 3 is a vector diagram of inertia forces acting on the knees of the crankshaft (end view); Fig. 4 shows the projections of the inertia forces of the crankshaft to the vertical 1 plane; in fig. 5 - the same, on a horizontal plane.

The crankshaft contains four elbows. Knee 1 is made with a short gpatun neck, knee 2 and 3 - with a long crank neck, and knee 4 - with a short one. At the same time, on the short connecting rod necks of knees 1 and 4, there are two times less connecting rods 5 than on the plates of knees 2 and 3. The knees 1 and 4 are located in the same plane and directed in one direction, and the plane of the knees 2 and 3 are located under 120 to the plane of the knees 1 p 4.

The operation of the node is as follows.

The crankshaft is mounted on the headers 7. To counterbalance the moments of inertia and centrifugal forces, the counterweights are mounted 6. With the crankshaft axis, the head 5 is connected by a piston 9 through the pistons 9, and they are returned to the backward-reachable movement along the pock 10 normals 9.

The plane of knees 1 p 4 is located at an angle of 120 ° to the plane of knees 2 and 3, with the same number of connecting rods attached to each plane, therefore, due to angular symmetry, all inertia forces P are mutually balanced, i.e. the main resultant the vector of inertia forces is zero (Fig. 3).

Elbows 1 and 4 are at the same distance from the center of the crankshaft (origin 0), located in the same plane and aligned in one direction, as a result, moments of inertia forces P

from these knees are mutually balanced (Fig. 4) The projections of the forces of inertia of knees 2 and 3 in the plane of knees 1 and 4, i.e. in the plane of the coordinate axes yZ (Fig. 4), connect moments that are also mutually balanced due to the same distance Nor from the center of the crankshaft (origin 0).

Projections of the inertia forces of knees 2 and 3 in the plane perpendicular to the slope of knees 1 and 4 (in the plane of the XZ coordinate axes) (Fig. 5) create a moment.

M 2P-sin60 ° -Q V3-P-Q, where Q is the intercylidene distance;

P is the force of inertia of one knee (cylinder).

While in the well-known three-shaft shaft, which has an inertia force of 2P for each neck, the total torque of inertia forces is

M 2-V5-P-Q, i.e., 2 times more.

In the assembly with such a crank arrangement, the inter-cylinder distance and, consequently, the size of the engine is maintained, but all unbalanced moments are halved. In addition, the number of root supports and inter-interdisc partitions decreases from 4 to 3. Such a design of the assembly can reduce the crankshaft counterweights, do not install a balancing mechanism, reduce the intensity of the crankshaft and its core , reduce the weight of the engine and increase its reliability.

Claims (1)

Invention Formula An internal combustion engine assembly containing a crankshaft and connecting rods mounted on its necks, the axial axes of symmetry. Kotor.x are laid out in three planes intersecting at an angle of 120, characterized in that in order to increase reliability by reducing dynamic loads in during the work, the shaft is made of four-knee, on the necks of each of the end knees is set 2 times iVieHbHje rods than on any of the central necks, and the longitudinal axes of the end knees are located in the same plane but one side of the shaft axis. fig.g Rsov 60 fzg.Z i2p Editor N. Shvydka Order 2948/40 VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 2Pcos6a ° 2P-COS60 cpusA X 2PilnBO 2P 51p6O ° FIG. five Compiled by V. Ivanov Tehred I. Veres Corrector A. Zimokosov Circulation 759 Subscription