RU75696U1 - PISTON Crank-rodless engine of internal combustion of portable electric power station - Google Patents

Abstract

The utility model is aimed at reducing the dimensions, mass and vibration of the internal combustion engine. The specified technical result is achieved by the fact that the engine is made opposed, twin-shaft and with uniformly distributed load removal from the crankshafts. A piston crank-rodless internal combustion engine for a portable power plant, contains a cylinder closed on both sides by caps, two parallel crankshafts directly connected to two opposed pistons. Four gears are installed at the ends of the shafts, the external gearing of which is designed to synchronize the rotation of the crankshafts and internal - for communication with gears of a drive of four electric generators. Gears have an offset center of gravity to balance the unbalanced masses of the crankshafts. 1 ill.

Description

The invention relates to internal combustion engines used to drive an electric power generator in a portable power plant.

Known piston internal combustion engine driving a generator of electrical energy (in a gas generator or diesel power plant) made with a crank mechanism. Such an engine is used in all commercially available low-power plants.

The disadvantages of such an engine are:

1) low compactness of the engine due to the presence of a connecting rod in it, for which it is necessary to increase the volume of the crankcase;

2) the need to use nodes designed to balance the inertia forces of the first and second order in order to reduce vibration, increasing the weight of the engine;

3) a high noise level due to the high crankshaft speed necessary to provide the required power with small engine sizes;

4) high demands on the strength of the crankshaft, in which torsional vibrations appear due to the fact that it is loaded on one side with an electric energy generator;

5) transfer of reactive torque to the engine mounts.

It is possible to reduce the dimensions of the engine by eliminating the connecting rod, by making it a crank-free connecting rod.

Known piston crank-rodless engine in which the piston is directly connected to the crankshaft (crank), which reduces the size of the engine. German patent DE 2847998 A1 dated 11/06/1978

This engine is the closest in nature and is selected as a prototype. The problem to which the claimed utility model is directed is:

1) reducing the size of the engine by removing the connecting rod from the engine structure;

2) simplifying the design of the engine by eliminating the nodes of the balancing inertia forces of the first and second order;

3) reducing torsional vibrations due to the placement of the generator on both sides of the crankshaft ;.

4) elimination of the reactive moment transmitted to the engine mounts.

The technical result achieved in this case is to reduce the size, mass and vibration of the engine,

To achieve the specified technical result in this problem, the internal combustion engine is made with a crank-piston mechanism according to the scheme of the crank-rocker mechanism, in which the piston acts as a rocker. Opposite two pistons are placed in one engine cylinder, which balances the inertia forces of the translationally moving masses and two crankshafts with a mutually opposite direction of rotation, eliminating the transfer of reactive torque to the engine mounts, to the ends of which four electric energy generators are connected

In FIG. The device of a piston crank-rodless internal combustion engine for a portable power plant is shown. The engine contains cylinder 1,

closed on both sides by covers 2, in which two crankshafts are placed perpendicular to its axis and parallel to each other, on the crank necks of which two opposed pistons 3 are mounted. Four gears 5 are secured at opposite ends of the crankshafts to synchronize the rotation of the crankshafts and internal gearing for gears 6 of a drive of four power generators. The centers of gravity of the gears are offset relative to the axis of rotation so that the gears are, at the same time, counterweights, unloading the bearings of the crankshaft from the action of unbalanced masses of the crankshaft.

The engine operates as follows. When the combustion products expand in the combustion chambers A, formed by the walls of the cylinder 1, the caps 2 and the external bottoms of the pistons 3, the pistons move to the middle part of the cylinder 3, compressing the air-fuel mixture (or clean air) inside the compression chamber B, and then flowing into the combustion chamber .. Gears 5 provide synchronous rotation of the crankshafts and, consequently, the movement of the pistons. The gears are interconnected by external gearing. The internal gearing of gears is intended for communication with gears 6 of the drive of electric generators.

Claims (1)

A piston crank-rodless internal combustion engine of a portable power plant, comprising a cylinder, a crankshaft and a piston directly connected to the crankshaft, characterized in that two crankshafts parallel to each other and two opposed pistons directly connected to the crankshafts are located in one cylinder, and four gears, mounted on opposite sides of the crankshafts, the external gearing of which is designed to synchronize the rotation of the crankshafts, the internal - for communication gear drive four generators, and the unbalanced mass which balance the unbalanced weight crankshafts.