摘要:
The present invention relates to a pump (10) comprising a shaft (15) supported for rotation by a bearing (38) carried by a bearing carrier (48), said bearing carrier having a generally outer radial portion (52) which is fixed relative to a pump housing (12) and a generally inner radial portion (54) which is fixed relative to the bearing, wherein the carrier is stiff in a radial direction between said inner and outer portions and flexible in an axial direction for restraining radial movement of the bearing and allowing axial movement.
摘要:
The present invention relates to a scroll pump (10) comprising two scrolls (20, 22) which are co-operable for pumping fluid from an inlet (24) to an outlet (26) on relative orbiting motion of the scrolls. Each scroll comprises a scroll base (30, 36) from which a spiral scroll wall (28, 34) extends generally axially towards the base of the opposing scroll. The pump comprises a tip seal arrangement comprising an axial end portion of one or both of the scroll walls which locates a tip seal (508) for resisting the passage of pumped fluid across the or both scroll walls between the or both scroll walls and the scroll base of the opposing scroll. The tip seal arrangement limits axial movement of the tip seal towards the scroll base of the opposing scroll along a first spiral region (507) of the or both scrolls between the inlet and the outlet.
摘要:
The present invention relates to a scroll pump with two scrolls that are co-operable for pumping fluid from an inlet to an outlet on relative orbiting motion of the scrolls. Each scroll comprises a scroll base from which a scroll wall extends generally axially towards the base of the opposing scroll. A gas conduit having an inlet at a first location of the pumping channel and an outlet at a second location of the pumping channel allows over-compression at the first location of the pumping channel to be exhausted to the second location of the pumping channel. A one-way valve located in the gas conduit allows the passage of gas through the conduit from the conduit inlet to the conduit outlet when a predetermined pressure differential between the first and second locations of the pumping channel is generated during roughing when the scroll inlet is at or close to atmosphere.
摘要:
The present application relates to a scroll pump (10) which comprises two scrolls (20, 22) which are co-operable for pumping fluid from an inlet to an outlet on relative orbiting motion of the scrolls. Each scroll (20, 22) comprises a scroll base (30, 36) from which a scroll wall (28, 34) extends generally axially towards the base of the opposing scroll. At least a first portion of one or each of the scroll walls has formed in an axial end face (3 thereof a plurality of pockets (38) distributed along said first portion for disrupting leakage of fluid from a high pressure side of said scroll wall to low pressure side of said scroll wall.
摘要:
The present invention relates to a scroll pump with two scrolls that are co-operable for pumping fluid from an inlet to an outlet on relative orbiting motion of the scrolls. Each scroll comprises a scroll base from which a scroll wall extends generally axially towards the base of the opposing scroll. A gas conduit having an inlet at a first location of the pumping channel and an outlet at a second location of the pumping channel allows over-compression at the first location of the pumping channel to be exhausted to the second location of the pumping channel. A one-way valve located in the gas conduit allows the passage of gas through the conduit from the conduit inlet to the conduit outlet when a predetermined pressure differential between the first and second locations of the pumping channel is generated during roughing when the scroll inlet is at or close to atmosphere.
摘要:
A multi-stage vacuum pump may include first and second half-shell components defining a plurality of pumping chambers and for assembly together along respective longitudinal extending faces; first and second end stator components for assembly at respective longitudinal seals for sealing between the first and second half-shell stator components when assembled together at the longitudinally extending faces; and annular seals for sealing between the first and second end stator components and the first and second half-shell stator components when assembled; wherein the longitudinal seals have end portions which abut against the annular seals for sealing therebetween and the first and second half-shell stator components have formations for resisting movement of the end portions away from the annular seals when the end portions are compressed between the first and second half-shell stator components.
摘要:
A multi-stage vacuum pump may include first and second half-shell components defining a plurality of pumping chambers and for assembly together along respective longitudinal extending faces; first and second end stator components for assembly at respective longitudinal seals for sealing between the first and second half-shell stator components when assembled together at the longitudinally extending faces; and annular seals for sealing between the first and second end stator components and the first and second half-shell stator components when assembled; wherein the longitudinal seals have end portions which abut against the annular seals for sealing therebetween and the first and second half-shell stator components have formations for resisting movement of the end portions away from the annular seals when the end portions are compressed between the first and second half-shell stator components.
摘要:
A scroll compressor may include a scroll pumping mechanism which includes an orbiting scroll having an orbiting scroll wall extending axially from an orbiting scroll plate towards a fixed scroll and a fixed scroll having a fixed scroll wall extending axially from a fixed scroll plate towards the orbiting scroll. An axial end portion of one of the scroll walls includes a first sealing arrangement and a second sealing arrangement arranged in series along the scroll wall from the inlet to the outlet for sealing between the axial end portion of the scroll wall and the scroll plate of the opposing scroll. The first sealing arrangement may have first sealing characteristics which are selected according to the sealing requirements local to the first sealing arrangement and the second sealing arrangement may have second, different sealing characteristics which are selected according to sealing requirements local to the second sealing arrangement.
摘要:
A scroll compressor includes two scrolls 40, 46 having respective scroll plates 42, 48 and respective scroll walls 44, 50. The scroll walls intermesh so that on relative orbital movement of the scrolls, a volume 52, 54 of gas is trapped between the scrolls and pumped from an inlet 31 to an outlet 33. The axial extent ‘A’ of the trapped volume between the scroll plates is less along a first portion 62 of a flow path 56 between the inlet and the outlet than the axial extent ‘B’ of the trapped volume along a second portion 64 of the flow path, and the first portion is closer to the inlet than the second portion along the flow path.
摘要:
The present application relates to a scroll compressor comprising a scroll pumping mechanism which comprises an orbiting scroll (20) having an orbiting scroll wall (34) extending axially from an orbiting scroll plate (36) towards a fixed scroll (22) and a fixed scroll having an fixed scroll wall (28) extending axially from a fixed scroll plate (30) towards the orbiting scroll. The compressor further comprises an axially extending drive shaft (14) having an eccentric shaft portion (16) so that rotation of the eccentric shaft portion imparts an orbiting motion to the orbiting scroll relative to the fixed scroll for pumping fluid from an inlet (24) to an outlet (26) of the pumping mechanism. An axial end portion of one of the scroll walls (28, 34) has a first sealing arrangement and a second sealing arrangement arranged in series along the scroll wall from the inlet to the outlet for sealing between the axial end portion of the scroll wall and the scroll plate of the opposing scroll, said first sealing arrangement having first sealing characteristics which are selected according to sealing requirements local to the first sealing arrangements and said second sealing arrangement having second sealing characteristics which are selected according to sealing requirements local to the second sealing arrangements, and said first sealing characteristics are different from said second sealing characteristics.