SU813053A1 - Positive-displacement hydraulic machine - Google Patents

Description

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The invention relates to hydraulic actuators, in particular, to hydraulic CMMs of a rotary motor bladed; type

Known volumetric hydraulic machine, including body with openings for supplying and discharging the working fluid and lids, in KOTO; EZHLH on bearings has a shaft with a blade, a fixed partition installed between the body and the shaft with the formation of two working chambers interconnected by a bypass channel, and seals placed in a cavity formed by bearings, a shaft and a cap, and the seal comprises two rings, mainly plastics, triangular cross section and an elastic ring placed between them 1.

A disadvantage of the known hydromash is the increased resistance to moving and moving the shaft due to preloading of the seal and locking in the cavity the sealing of the working fluid with a pressure equal to the maximum working pressure arising at one of the points of the hydraulic engine operation.

The purpose of the invention is to increase the reliability of the volumetric hydraulic machines.

The goal is achieved by the fact that the cross section of the rings has the form of rectangular non-isosceles triangles, the smaller legs of which are in contact with the sealing surfaces of the shaft, and the hypotenuse form a convergent angle in which

0, there is an elastic ring having a circular cross section, cavities through channels in the shaft and blade, connect with an overflow channel, made in the blade, and in the place of their 5 junction, an OR valve is installed. j

FIG. 1 schematically shows the proposed volumetric hydraulic machines, longitudinal section, in FIG. 2 - green I in FIG. one; in fig. 3 - volumetric hydraulic machine, cross section.

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Claims (1)

The volumetric hydraulic machine comprises a housing 1 with openings 2 and 3 for supplying and discharging the working fluid and covers 4 and 5, in which on bearings 6 and 7 there is a shaft 8 with a pilot 9, a fixed partition 10 installed between the housing 1 and the shaft 8 to form two working chambers 11 and 12 interconnected by a bypass channel 13 and seals 14 and 15 placed in columns formed by bearings b and 7, shaft 8 and covers 4 and 5. Each of seals 14 and 15 contains two rings 16 and 17 mostly plastic, triangular cross section and elastic ring 18, placed between them. The cross section of the rings 16 and 17 has the form of rectangular non-isosceles triangles, the smaller legs 19 and 20 of which are in contact with the sealing surfaces of BC 8, and the hypotenuse 21 and 22 form a converging angle in which the elastic ring 18 is freely placed round section. The cavities through the channels 23 and 24 in the shaft 8 and the channels 25 in the blade 9 are connected to the bypass channel 13 made in the blade 9, and the valve OR 26 is installed in the place of their connection. The hydraulic machine works as follows. When feeding the working fluid, for example, into the hole 2, it fills the working chamber 11 of the hydraulic machine. If the force from the pressure of the supplied working fluid exceeds the resistance to movement of the blade 9, the blade 9 and with it the shaft 8 in bearings 6 and 7 are rotated relative to the longitudinal axis of the hydraulic machine. The working fluid is displaced from the working chamber 12 by the spatula 9 into the opening 3. Thus, during the operation of the hydraulic machine, one of the working chambers, for example 11, is a pressure cavity, and the other is a drainage cavity Absence of leakage from the cavity into the cavity and leakage along the shaft 8 beyond the limits of the hydraulic machine is achieved as follows. From the working chamber 11, the pressure cavity, the working fluid through the bypass channel 13 and the valve, 26 of type OR n (steps into the cavities of the seals 15 and 14. Under the action of the pressure of the working fluid, the elastic ring 18 of the circular cross section is squeezed into the said contiguous angle and Acting like a wedge, presses the plastic rings 16 and 17 against the sealing surfaces of the shaft 8. When reversing the hydraulic machine, valve 26 OR connects the cavities of the seals 14 and 15 to the working chamber to which the working fluid is led. Next, the work cycle is repeated. allows you to Reliable operation of the volumetric hydraulic machine by reducing friction in the compaction unit and eliminating leakages between cavities Formula of the Invention A volumetric hydraulic machine includes a housing with openings for supplying and discharging the working fluid and lids in which a shaft with a blade, a fixed partition is mounted on bearings, installed between the housing and the shaft with the formation of two working chambers connected to each other by a bypass channel, and seals placed in cavities formed by bearings, a shaft and covers, with the seal The ring contains two rings, predominantly plastic, of triangular cross section and an elastic ring placed between them, characterized in that, in order to increase the reliability of the volumetric hydraulic machine, the cross section of the rings has the form of rectangular non-isosceles triangles, the smaller legs of which are in contact with the sealing surfaces shaft, and the hypotenuse form a convergent angle in which an elastic ring with a circular cross section is freely placed; the cavities are connected to the bypass channel through channels in the shaft and blade made in the blade, and in the place of their connection the valve OR is installed. Sources of information taken into account in the examination 1. UK patent No. 1096266, cl. F 16 J 15/16, published 1965.