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US 11,536,271 B2Granted
Sealing device for oil injection-type screw compressor
AssigneeJae Young Lee
InventorsJae Young Lee, Kil Won Son, Yu Sang Han
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AssigneeJae Young Lee
InventorsJae Young Lee, Kil Won Son, Yu Sang Han
Estimating the term…
A screw compressor of the present invention comprises: a housing having a compression chamber; male and female rotors provided in the compression chamber; a driving shaft for rotating the male and female rotors; and a seal cover across which the driving shaft is provided, and further includes: an oil chamber provided at the seal cover, and returning, to the compression chamber, oil having leaked into the driving shaft; and a breather for injecting external air into the oil chamber. Therefore, the breather is provided at the upper part of the oil chamber and an oil recovery line is provided at the lower part thereof so as to cause a pressure difference between the upper and lower parts of the oil chamber, such that the flow of the oil having leaked into the driving shaft is smoothly recovered in the oil recovery line.
A screw compressor comprising a housing having a compression chamber, male and female rotors provided in the compression chamber, a drive shaft for rotating the male and female rotors, and a seal cover across which the drive shaft is provided, the screw compressor further comprising:
Dependencies are inferred from the claim text.
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Systems for the equilibration of forces acting on the pump: internal leakage control
Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00: lubrication ;…
With toothed rotary pistons: with helical teeth, e.g. chevron-shaped, screw type
For other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine: shaft sealings specially adapted for…
About 12 years 6 months of term left · ends 9 May 2039 (estimated)
This application is a U.S. National Stage entry under 35 U.S.C. § 371 based on International Application PCT/KR2018/015907, filed on Dec. 14, 2018, which claims the benefit of priority to KR 10-2017-0176915, filed Dec. 21, 2017 which is incorporated herein by reference in its entirety.
The present invention relates to an oil injection-type screw compressor, and more particularly, to a sealing device for an oil injection-type screw compressor for recovering oil leaking into a drive shaft.
In general, a screw compressor is a device that produces compressed air by sucking, compressing, and discharging a working fluid (hereinafter referred to as “air”) by a change in a sealing space caused between a pair of male and female rotors and a housing when the male and female rotors engage and rotate in opposite directions.
FIGS. 1 to 3 are cross-sectional views showing screw compressors according to the prior art.
FIG. 4 is a perspective view showing a screw compressor according to the present invention.
FIG. 5 is a cross-sectional view of FIG. 4.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 4 is a perspective view showing a screw compressor according to the present invention, FIG. 5 is a cross-sectional view of FIG. 4, FIG. 6 is a partially enlarged cross-sectional view of FIG. 5, and FIG. 7 shows a screw compressor and an air oil separator tank according to the present invention.
As shown in FIGS. 4 to 7, a screw compressor A according to the present invention comprises a housing 100 having a compression chamber 110, male and female rotors 200 provided in the compression chamber 110, a drive shaft 300 for rotating the male and female rotors 200, and a seal cover across which the drive shaft 300 is provided.