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发明公开
EP2871367A1 Roots-style blower with leakage mechanisms 有权
WurzelartigesGebläsemit Leckmechanismen

Roots-style blower with leakage mechanisms
摘要：
The invention concerns a Roots-type blower (1) comprising a housing (20) defining first and second transversely overlapping cylindrical chambers (41, 42) and at least one inlet port (23) and an outlet port (25); first and second meshed, lobed rotors (31, 32), each lobe having a top land (53, 54) sealingly cooperating with said cylindrical chambers (41, 42), a plurality of control volumes for transfer of fluid, each control volume being defined by a pair of adjacent lobes (51, 52) on one of the rotors (31, 32), and at least one of the cylindrical chambers (41, 42); and blowholes (55) formed within the cylindrical chambers (41, 42) in connection with meshing of the lobes (51, 52) of the first and second rotors (31, 32); wherein blower (1) comprises at least one backflow slot (29) extending through the housing (20) wall of each cylindrical chamber (41, 42) for effecting a leakage of fluid from downstream the at least one outlet port (25) into a control volume. The invention also concerns a Roots-type blower (1) comprising at least one bleed recess (45) provided in an end wall (44) of the cylindrical chambers (41, 42), wherein said bleed recess (45) provides a passage such that fluid is enabled to leak between adjacent control volumes.
摘要（中）：

本发明涉及一种罗茨式鼓风机（1），其包括限定第一和第二横向重叠的圆柱形腔（41,42）和至少一个入口（23）和出口（25）的壳体（20）。 第一和第二啮合的叶片转子（31,32），每个叶片具有与所述圆柱形腔室（41,42）密封配合的顶部区域（53,54），用于传送流体的多个控制体积，每个控制体积 由一对转子（31,32）上的一对相邻的叶片（51,52）和至少一个圆柱形腔室（41,42）限定; 以及与所述第一和第二转子（31,32）的叶片（51,52）的啮合相关联地形成在所述圆柱形腔室（41,42）内的气孔（55）; 其中鼓风机（1）包括延伸穿过每个圆柱形腔室（41,42）的壳体（20）壁的至少一个回流槽（29），用于使流体从至少一个出口端口（25）的下游泄漏到 控制体积。 本发明还涉及一种罗茨式鼓风机（1），其包括设置在圆柱形腔室（41,42）的端壁（44）中的至少一个排放凹部（45），其中所述排放凹槽（45） 该流体能够在相邻控制体积之间泄漏。

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