DEVRIES, DOUGLAS F.,WILLIAMS, MALCOLM R.,BOYLE, DAVID,HOLMES, MICHAEL
申请号：
CA2574082
公开号：
CA2574082C
申请日:
2004.11.10
申请国别(地区):
CA
年份:
2014
代理人:
摘要：
A Roots-type blower comprises a housing defining a rotor chamber and an inletand outlet to the rotor chamber. First and second rotors are mounted in therotor chamber,each rotor defining a plurality of lobes, adjacent lobes and the housingcooperating todefine gas transport chambers. The blower is configured so that a net flowrate of gas intoa gas transport chamber is generally or approximately constant, whereby achange in gaspressure in the gas transport chamber is generally or approximately linear, asthe gastransport chamber approaches the outlet. In one embodiment, this isaccomplished byproviding flow channels extending from the outlet towards the inlet, and fromthe inlettowards the outlet, corresponding to each rotor. The flow channels permit gasto flow fromthe high pressure outlet to a gas transport chamber and from the gas transportchamber tothe low pressure inlet.
