Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Single valve for relatively movable working members driving...
Patent
1987-07-16
1988-07-12
Garrett, Robert E.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Single valve for relatively movable working members driving...
92 48, 92 69R, 92 75, 92 50, 92 89, 92 90, 92 91, 92 92, F15B 1100, F15B 1300
Patent
active
047562374
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to volume displacement machines and, more particularly, the invention relates to devices for converting energy of a fluid medium into mechanical work of a working member.
PRIOR ART
At the present time the convertion of energy of a fluid medium into mechanical work of a working member is effected by well known piston engines comprising a chamber in which a piston made of a rigid material and provided with movable seals. However, these machines have the following disadvantages:
low reliability and useful life due to frequent failure of the movable seals;
high requirements imposed on the accuracy and surface finish of the chamber and piston, which do not allow modern technology to make the chambers with a volume exceeding 1 m.sup.3 ;
a short stroke of the piston due to a limited volume of the chamber and structural rigidity.
This made it necessary to develop such devices for converting energy of a fluid medium into mechanical work of a working member, which are provided with pistons made of an elastic material.
Known in the art is a device for converting energy of a fluid medium into mechanical work (cf. French Pat. No. 788197, NPC 46 a .sup.10 2, published in 1935) comprising a housing and two chambers disposed in this housing in opposition to each other. Each chamber has a piston made of a rigid material and coupled to a working member through a two-sided rack interconnecting both said pistons. When the pistons reciprocate, the two-sided rack rotates the working member gear wheel.
The prior art device does not provide a large stroke of the working member per piston stroke, which is limited by the chamber length. The chamber cannot be made of a large length due to the high requirements imposed on the accuracy and surface finish of the chambers and pistons and due to low tolerances to the coaxial alignment of both chambers. Owing to the rigid mounting of the pistons and working member the device does not provide automatic centring of the pistons relative to the working member and simultaneous transmission of their forces to the working member and this limits the field of application of this device; for example, it cannot be used for driving the working tool of a metal drawing machine. The device also cannot be used as a motor moving along a rope since the device itself cannot move along the working member. Furthermore, the device features low efficiency due to a limited stroke of the piston inside the chamber and the absence of simultaneous transmission of the forces of the pistons to the working member, since the filling of the chambers with the fluid medium is effected alternately.
ESSENSE OF THE INVENTION
It is an object of the present invention to provide a device for converting energy of a fluid medium into mechanical work of a working member, featuring such a structural design of pistons thereof and their interconnection which ensure an increased length of the working member stroke per cycle of the piston reciprocation, simultaneous transmission of forces of the both pistons as well as their reciprocations to the working member, whereby technological facilities of the device are made broader, the efficiency thereof is raised and the design is simplified.
This object is attained in a device for converting energy of a fluid medium into mechanical work of a working member comprising a housing, two chambers disposed in the housing oppositely to each other, each chamber having a piston connected to the working member through a kinematic connection; and a system with a distribution valve for supply of a fluid medium, in which, according to the invention, the chambers are interconnected through a pipeline having a pressure space communicating with the fluid medium supply system; the kinematic connection of each piston with the working member includes a shaft mounted in the chamber, one end of this shaft being kinematically connected to the working member; and a drum connected to the other end of the shaft and provided with a reverser; each piston is made in
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Kryazhevskikh Nikolai F.
Shapovalov Jury P.
Shishkin Viktor V.
Denion Thomas
Garrett Robert E.
Trest "Juzhvodoprovod"
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