Oil-free screw compressor and method of manufacture

Details Oil-free screw compressor and method of manufacture Oil-free screw compressor and method of manufacture

1993-09-14

1994-11-15

Bertsch, Richard A.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

418178, 418179, 427438, 2988923, 2988971, F01C 116, B05D 118

Patent

active

053642503

ABSTRACT:
A method of producing an oil-free screw compressor has the following steps: preparing a semi-finished metallic female rotor which has a spiral profile, and a semi-finished metallic male rotor which has a spiral profile; forming a metallic coating film containing particles of grinding material on the surface of the semi-finished female rotor; forming, on the surface of the semi-finished male rotor, a coating film of a material softer than the metallic coating film on the female rotor; grinding the surfaces of the semi-finished rotors into predetermined configurations; mounting the ground rotors on bearings so that the rotors are assembled in a rotor casing with a substantially constant spacing held between the axes of the semi-finished rotors; mounting timing gears on the rotors so as to drivingly connect the rotors each other; and driving the rotors by driving means while restraining the back lash in the rotating direction by means of the timing gears and applying a compression load to the rotors so that the coating film on the female rotor grinds and generates the coating film on the surface of the male rotor, thereby completing profiling of the male rotor and establishing a desired minimum gap between both rotors.

REFERENCES:
patent: 4466785 (1984-08-01), Biswas
patent: 4666786 (1987-05-01), Yano et al.
patent: 5060531 (1991-10-01), Iguchi et al.

Affiliated with

Also associated with

Rating

Oil-free screw compressor and method of manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oil-free screw compressor and method of manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil-free screw compressor and method of manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1093263