Structure for clamping single-stage high-speed centrifugal fan impeller
A high-speed centrifugal and fan impeller technology, applied in the field of positioning and clamping structure of the impeller, can solve the problems that the impeller is prone to axial movement and affects the smooth operation of the impeller, so as to prevent axial movement and have a simple structure , to ensure the effect of smooth operation
Active Publication Date: 2012-11-21
WUXI GL TUBRO COMPRESSOR
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Problems solved by technology
[0002] In the prior art, the impellers in single-stage high-speed centrifugal fans are generally fixed on the rotating shaft by bolts and nuts, and lock washers are used to prevent the nuts from loosening. During long-term use, due to the stress relaxation phenomenon of the bolts , so that the impeller is prone to axial movement during operation, which affects the smooth operation of the impeller
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[0012] Below the present invention will be further described in conjunction with the embodiment in the accompanying drawing:
[0013] Such as figure 1 Shown: The present invention includes an impeller 1, a rotating shaft 2, a stud bolt 3, a C-shaped ring 4, a shoulder nut 5, and the like.
[0014] The rotating shaft 2 is provided with a positioning hole 2-1 and a central screw hole 2-2; the front end of the impeller 1 is provided with a positioning boss 1-1, and the back of the impeller 1 is provided with a positioning boss 1 -2; one end of the C-shaped ring 4 is a plane 4-1, the other end is a conical surface 4-2, a central through hole 4-3 is provided at the end of the plane 4-1, and a conical surface 4-2 is provided at the end The central through hole 4-4, the C-shaped ring cone surface 4-2 form an included angle A with the vertical surface of the center line, and the included angle A is generally 3-5 degrees.
[0015] The positioning boss 1-2 on the back of the impeller ...
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The invention relates to a structure for clamping a single-stage high-speed centrifugal fan impeller, which is provided with a positioning hole and a center screw hole on a rotating shaft, wherein the front end surface of an impeller is provided with a positioning lug boss, and the back side of the impeller is provided with a positioning lug boss; one end of a C-shaped ring is a flat surface, theother end of the C-shaped ring is a conical surface, the flat surface end of the C-shaped ring is provided with a center through hole, the conical surface end of the C-shaped ring is provided with a center through hole, and an included angle A is formed between the conical surface of the C-shaped ring and the vertical surface of a center line; the positioning lug boss on the back side of the impeller is arranged in the positioning hole of the rotating shaft; and the center through hole of the conical surface end of the C-shaped ring is sleeved on the positioning lug boss of the front end surface of the impeller, and a shouldered screw nut tightly presses the flat surface of the C-shaped ring through a stud bolt screwed into the center screw hole of the rotating shaft. The structure provided by the invention is simple, compact and reasonable, and can effectively compensate the stress relaxation of the screw bolt, prevent the axial jumping of the impeller and ensure the stable operationof the impeller.
Description
technical field [0001] The invention relates to a clamping structure for the impeller of a single-stage high-speed centrifugal fan. Specifically, it is a positioning and clamping structure for the impeller to ensure the reliability of the operation of the impeller and belongs to the technical field of mechanical structures. Background technique [0002] In the prior art, the impellers in single-stage high-speed centrifugal fans are generally fixed on the rotating shaft by bolts and nuts, and lock washers are used to prevent the nuts from loosening. During long-term use, due to the stress relaxation phenomenon of the bolts , so that the impeller is prone to axial movement during operation, which affects the smooth operation of the impeller. Contents of the invention [0003] The object of the present invention is to overcome the above disadvantages, thereby providing a single-stage high-speed centrifugal fan impeller clamping structure, which can effectively compensate the...
Claims
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IPC IPC(8): F04D29/62F04D29/28
Inventor 金华明
Owner WUXI GL TUBRO COMPRESSOR