Water lubricated screw compressor
AssigneeHitachi Industrial Equipment Systems Co., Ltd.
InventorsFumio Takeda, Masayuki Kasahara, Takehiro Matsuzaka, Tsutomu Nozaki, Hideharu Tanaka
Life of this patent
Estimating the term…
Abstract
In a water-supply line for performing water-supply to the rotors and the mechanical seal of a compressor, or in a condensed-water collection line for collecting condensed water of a dryer into the inlet port of the compressor, a water reservoir is provided at a position higher than the water-supply unit of the compressor. Moreover, there are provided a start-time water-supply line and a solenoid valve set up therein. Here, the start-time water-supply line establishes the connection between the lower portion of the water reservoir, and the inlet port of the compressor and the water-supply unit of the mechanical seal.
Claims5
A water-lubricated screw compressor, comprising:
- a single pair of male/female resin screw rotors, both ends of said resin screw rotors being supported by bearings, a clearance between a discharge-side end surface of each of said resin screw rotors and a discharge-side bearing chamber being sealed by a mechanical seal, said resin screw rotors being contained inside a casing equipped with an inlet port and a discharge port;
- a water-supply line for supplying water into a compression chamber of said screw compressor and a slide part of each said mechanical seal, said water being retained in a water tank inside a water separator;
- and
- a discharge stream line for establishing connection between said discharge port and said water separator;
- wherein
- said water-lubricated screw compressor further comprises:
- a water reservoir provided at a position of said water-supply line higher than a water-supply position of said screw compressor;
- an entrance line into the water reservoir and an exit line out of the water reservoir extending from an upper surface of an upper portion of said water reservoir;
- a start-time water-supply line provided at lower portion of said water reservoir, said the start-time water-supply line being connected to said inlet port of said casing and a water-supply of said mechanical seals;
- and
- a solenoid valve provided between said water reservoir and said start-time water-supply line.
A water-lubricated screw compressor, comprising:
- a screw chamber containing a screw rotor for providing compressed air;
- a water separator separating water from the compressed air;
- a water tank containing the separated water, and supplying the separated water using a difference in pressure between the water tank and the screw chamber;
- and
- a water reservoir located between the water tank and the screw chamber and containing the separated water supplied from the water tank;
- an entrance line supplying water to the water reservoir;
- and
- an exit line supplying water from the water reservoir to the screw chamber;
- wherein
- the water reservoir supplies the water to the screw compressor using a difference in height between the water reservoir and the screw chamber when the difference in pressure is insufficient to supply water from the water tank to the screw chamber;
- and
- the entrance line and the exit line extend from an upper surface of the water reservoir or from an upper portion of a side surface of the water reservoir.
Dependencies are inferred from the claim text.