Anti-friction slide valve support for screw compressor
OwnerThomas D. Blackwellinventor
Life of this patent
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Abstract
A screw compressor including a coacting male and female rotor with respect to which a slide valve is operable to control the discharge of the compressor and also regulate the pressure of the fluid pumped or compressed thereby, the improvement comprising a limited number of different embodiments of anti-friction constructions for supporting the slide valve within the cylindrical bore provided therefor in the housing within which the male and female rotors operate, thereby minimizing the wear upon the slide valve within the bore therefor and minimizing the force required to move the slide valve.
Claims7
A screw compressor comprising a pair of coacting helical screw rotors operable within complementary intersecting bores within a housing, and a slide valve axially movable in parallelism with the axes of said rotors within a substantially cylindrical bore formed in said housing below and partially intersecting said complementary intersecting bores, said side valve forming a continuation of said intersecting bores so as to be closely adjacent the screw rotors, in combination with rotatable anti-friction means mounted in at least one longitudinal groove in said cylindrical bore for horizontal operation between said cylindrical bore and slide valve longitudinally of the axis thereof and operable to prevent rotation of said slide valve about its longitudinal axis and to support said slide valve relative to said cylindrical bore and minimize friction therebetween, thereby minimizing the force required to move said slide valve axially within said cylindrical bore.
Dependencies are inferred from the claim text.