Patent ID: 6045343
Filing Date: 2000-04-04
Classification: F04C

Abstract:
A rotary compression equipment comprising:a housing;at least two intermeshing hollow rotors respectively secured on two shafts rotatably mounted in said housing; a first shaft having a driving gear engageable with a follower gear formed on a second shaft for rotating said two rotors for delivering fluid through said housing; andat least two cooling means each formed in each said shaft and each said hollow rotor for feeding a coolant through at least a coolant passage formed through said shaft and said hollow rotor for removing heat in said shaft and said rotor and dissipating heat outwardly from said housing;each said cooling means including: a core tube secured in a portion of the housing, an axle coolant passage longitudinally formed in the core tube which is rotatably engageable in a central portion of said shaft having an intermediate axle passage formed in the shaft and linearly connected with the axle coolant passage for directing coolant into the axle coolant passage and said intermediate axle passage; a feed conduit radially connected with the intermediate axle passage for feeding coolant from the axle passage into a rotor coolant passage concentrically and cylindrically formed in a central portion of the rotor adjacent to an interface between the rotor and the shaft about an axis of the shaft, and communicated with the feed conduit; a helical channel helically continuously formed in a helical thread formed on the rotor to form a hollow portion in the helical thread and communicated with the rotor coolant passage; a recycled conduit radially formed in the shaft and connected between a peripheral passage (formed in the shaft) and the rotor coolant passage for recycling the coolant into the peripheral passage juxtapositioned to the axle coolant passage for recycling the coolant through a drain conduit to a discharge passage formed in a portion of the housing for dissipating heat outwardly.