| 摘要 |
<p>The present invention relates to a multi-stage vacuum pump comprising: first and second half-shell stator components (102, 104) and first and second end stator components (22, 124) which when assembled define a plurality of pumping chambers (106, 108, 110, 12, 114, 116). The half-shell components are assembled together along respective pairs of mutual engaging longitudinal faces (12) and the end stator components are assembled at the ends of the half-shell components at respective pairs of mutual engaging end faces (18). An annular channel (22) is counter-sunk in at least one end face of each pair of mutual engaging end faces for receiving respective sealing members (34) for sealing between the half-shell components and the end stator components. Recesses (20) are counter-sunk at the end portions of the longitudinal faces for receiving a sealant and supports (24) provide support for the annular sealing members at the recesses when the annular sealing members are received in the annular channels to resist protrusion of the annular sealing members into the recesses when compressed between mutually engaging end faces.</p> |
