Oscillating piston pump or similar machine

Pumps – Expansible chamber type – Oscillating pumping member

Patent

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Details

417482, F04C 2100

Patent

active

052036847

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to an arrangement of pumps, compressors, motors or similar machines, comprising a machine housing having a first housing component, which together with a pair of mutually opposite end members and one or more pairs of mutually diametrically opposite partition walls projecting radially inwards define a first hollow space which surrounds a rocker piston member with associated hub portion and from the latter piston wings projecting radially outwards, and a second housing component, which together with a pair of end members define a second hollow space which surrounds a crank arm mechanism for subjecting the rocker piston member to an oscillating movement. With the present invention, the aim is an especially simple constructional solution where relatively few separate parts can be employed and where the parts can be assembled together in a simple and ready manner. The objective is a solution which is especially suitable for high speed machines, that is to say with a speed of for example 10-20,000 oscillations per minute. In addition, the aim is a solution which is reliable in use. The arrangement is characterised in that the housing components with associated end members and the rocker piston member with associated piston wings and hub portion are axially displaceably arranged relative to each other. The housing components with at least the one associated end member are being easily releasably connected to each other via the hub portion of the rocker piston member, which in one piece spans over the first and second hollow spaces. The hollow spaces of the first housing component and of the second housing component are separately defined relative to the hub portion of the rocker piston member, the hollow spaces being sealed off relative to each other by means of a sealing ring which is arranged on the common hub portion between the one end member of the first housing component and the one end member of the second housing component and/or between the one end member of the first housing component and a bearing in one end member of the second housing component.
By means of a rocker piston member in one piece, one is able to achieve according to the invention coupling together of different components which form a part of the machine in an especially simple and easy manner with a small number of coupling means and by means of simple assembling and disassembling operations. Furthermore, a solution is achieved which by its simple design and with its relatively small number of parts has large operational and useful advantages, such as compact construction and low weight. Special advantages are achieved by limiting and completely separating the two hollow spaces in an especially simple and effective manner, that is to say the work chamber-forming hollow space and the lubricant-receiving hollow space, in a fluid-tight and gas-tight manner relative to each other, so that the penetration of lubricant into the work chambers can be avoided, at the same time as an effective lubrication of the parts which are received in the lubricant-receiving hollow space can be ensured.
Special advantages are obtained furthermore in that the hub portion of the rocker piston member is rotatably disposed in bearings in mutually opposite end components of the second housing component, the hub portion being extended from said bearing in the one end member of the second housing component past the coupling-together region of the hub portion for the crank arm mechanism to a second bearing in the other end member of the second housing component, while at the opposite end, by the associated piston wings, the hub portion projects free endingly inwards into the hollow space of the first housing component.
In this way, the rocker piston member can be mounted exclusively or almost exclusively in the end members of the second housing component. In the case of a compressor or pump, a rotary movement can be converted from a drive shaft via the crank arm mechanism in the second hollow space to an oscillatory movement for the rock

REFERENCES:
patent: 1516584 (1924-11-01), Wilson

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