Fluid machine with radial cylinders

Abstract

A fluid machine with radial cylinders, includes cylinders being fixed with respect to a body wherein the cylinders are peripherally spaced in a rotation plane of a crank rotating with a driving shaft of the machine, elements distributing a fluid, a piston of each cylinder placed in contact with a surface of the crank by a sliding member, the piston of each cylinder being placed within a jacket of the cylinder with contact of a side surface of the piston in a guide and sealing area which is small with respect to the side surface of the piston, and for a guide function an annular edge is present and projecting from an inner surface of the jacket, and for a sealing function a sealing ring is present on the jacket and housed in an annular slot which is parallel and attached to the annular edge, and rings maintaining the contact between the pistons and the crank.

Description

technical field [0001] The present invention relates to an improved fluid machine with radially arranged cylinders, ie a machine, advantageously for fluids under pressure, having radially arranged cylinders fixed to its own crankcase, wherein each piston Coupled to its own cylinder so as to reduce the number of coupling parts, thereby reducing the overall size, and significantly improving the mechanical performance of the machine. Background technique [0002] In the particular field of machines with radially arranged cylinders, the state of the art includes hydraulic engines with cylinders that oscillate relative to the engine block as well as with fixed cylinders; the fixed cylinders have connecting elements connecting the crank and the piston, such as connecting rods, The sliding surface of the piston base, or the sliding block of the piston body on the crank. [0003] On the other hand, the above-mentioned hydraulic machines have considerable dimensions due to the use o...

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Problems solved by technology

[0003] On the other hand, the above-mentioned hydraulic machines have considerable dimensions due to the use of parts, since it is necessary to arrange such things as connecting rods, said sliding surfaces and blocks between the cylinders and the cranks of the parts, which, due to their presence, force Significant increase in machine size with equal displacement

Therefore, the cylinder head is usually realized by a plug or cover clamped with a screw or nut, the diameter of which is larger than that of the sleeve, which further increases the size of the machine

[0004] Moreover, the distributors known in the art for hydraulic machines with radial cylinders are centered on their inner diameter and are guided in rotation by a prismatic coupling with the drive shaft, they have a series of tolerances, in These tolerances create higher angular clearances on the distributor during installation; therefore, installation on the port plate produces abnormal wear and makes it sometimes necessary to precess or advance the distributor for a proper functioning of a hydraulic press for a particular application. making corrections becomes difficult

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