发明授权
- 专利标题: Control means for gas compressor having dual slide valves
- 专利标题(中): 具有双滑阀的气体压缩机的控制装置
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申请号: US740817申请日: 1985-06-03
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公开(公告)号: US4610613A公开(公告)日: 1986-09-09
- 发明人: Paul G. Szymaszek
- 申请人: Paul G. Szymaszek
- 申请人地址: WI Milwaukee
- 专利权人: Vilter Manufacturing Corporation
- 当前专利权人: Vilter Manufacturing Corporation
- 当前专利权人地址: WI Milwaukee
- 主分类号: F04C18/16
- IPC分类号: F04C18/16 ; F04C18/52 ; F04C18/54 ; F04C28/12 ; F04C18/20
摘要:
A rotary screw gas compressor for a refrigeration system comprises a motor-driven single main rotor having helical grooves and mounted for rotation in a rotor bore in the compressor housing and a pair of star-shaped gate rotors rotatably mounted in the housing and engageable with the helical grooves to define a plurality of compression chambers. A suction slide valve member is slidably positionable (between full load and unload positions) to control where low pressure uncompressed refrigerant gas from a suction port is admitted to the compression chambers to thereby function as a suction bypass to control compressor capacity. A discharge slide valve member is slidably positionable (between minimum and adjusted volume ratio positions) to control where high pressure compressed refrigerant gas is expelled from the compression chambers to a discharge port to thereby control the volume ratio and thereby the input power to the compressor. Both slide valve members are disposed in side-by-side sliding relationship in a common recess in the compressor housing which extends alongside and communicates with the rotor bore and each has a face which is complementary to and confronts the main rotor surface in sliding sealed relationship. The slide valve members are independently movable by separate piston-cylinder type hydraulic actuators. A control system responsive to compressor capacity and volume ratio operates the actuators to position the slide valve members to cause the compressor to operate at a predetermined capacity and minimum power input. The control system includes sensing devices to detect the position of the slide valve members.
公开/授权文献
- US5856806A Antenna support sleeve with fingerlock 公开/授权日:1999-01-05