Impeller-suspended superminiature pump
An ultra-small, impeller technology, applied in the direction of pumps, parts of pumping devices for elastic fluids, pump devices, etc., can solve problems such as application limitations of ultra-small pumps, and achieve good self-regulation performance, smooth flow, good physiological Compatibility effect
Inactive Publication Date: 2012-10-03
TSINGHUA UNIV +1
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Problems solved by technology
Therefore, the application of ultra-small pumps with double-suction structure is limited in many fields.
Method used
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[0015] The principle and structure of the present invention will be further described below in conjunction with the accompanying drawings.
[0016] figure 1 It is a cross-sectional view of an ultra-small pump with impeller suspension provided by the present invention. The ultra-small pump includes a pump casing 1 , a motor stator 2 , a pressurized water chamber 4 , a permanent magnet 6 , an impeller 10 , a suction inlet 12 and a pump outlet 14 . The impeller 10 is arranged in the pressure water chamber 4, and the pressure water chamber 4 and the outlet pipe 3 are generally of an integrated structure; the pump casing, the impeller and the pressure water chamber constitute the flow channel of the pump. The impeller 10 includes the impeller front cover 8 and blades 5; the permanent magnet 6 is embedded in the impeller front cover 8, the motor stator 2 is embedded in the pump casing 1, and the permanent magnet and the motor stator are arranged opposite to each other in the axial ...
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The invention relates to a vane type superminiature pump with no mechanical shaft, no leakage and no contact between fluid and the outside of the pump, in particular to an impeller-suspended superminiature pump. The impeller-suspended superminiature pump is technically characterized in that a motor stator of the superminiature pump is embedded into a pump casing, a permanent magnet is embedded into a front shroud of an impeller, and the motor stator and the permanent magnet are oppositely arranged to jointly form a motor structure of a pump unit. An axial clearance is reserved between a pump casing axial inner surface and an impeller front shroud axial outer surface, and fluid dynamic pressure support for restraining axial motion of the impeller can be formed during normal operation of the pump. A radial clearance is reserved between an impeller front shroud radial outer surface and a pump casing radial inner surface, and fluid dynamic pressure support for restraining radial motion of the impeller can be formed during normal operation of the pump. Therefore, the impeller can suspend in a pump cavity during normal operation. By the impeller-suspended superminiature pump, a fine flow condition can be effectively formed in the inner cavity of the pump casing, so that hydraulic efficiency of the pump can be improved, controllability of flow design can be improved, and the structural size of the superminiature pump can be further decreased.
Description
technical field [0001] The invention relates to a vane-type small pump, in particular to a vane-type ultra-small pump suitable for no external mechanical shaft, no fluid leakage, and no contact between the fluid and the outside of the pump. It is suitable for extracorporeal blood circulation devices, artificial hearts, Fluid conveying devices in aerospace, fine chemical and biopharmaceutical fields. Background technique [0002] According to the supporting structure of the impeller, the currently used vane-type ultra-small pumps mainly include: the form of an external mechanical shaft, and the form of magnetic levitation. For vane-type ultra-small pumps with external mechanical shafts, due to the use of mechanical seals or other shaft sealing devices, the fluid in the pump cannot be completely isolated from the outside of the pump, and it cannot effectively prevent fluid leakage or contact between the fluid in the pump and the outside world; For vane-type ultra-small pumps ...
Claims
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IPC IPC(8): F04D13/06F04D29/22F04D29/42F04D29/00
Inventor 罗先武季斌陈星吴清玉陈朦朦刘树红张明奎许洪元
Owner TSINGHUA UNIV