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Shafting assembly structure

A component structure and shafting technology, applied to pump components, parts of pumping devices for elastic fluids, non-variable pumps, etc., can solve problems such as large changes in rotor unbalance, and improve alignment accuracy , the effect of stable operation

Pending Publication Date: 2022-03-08
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional impeller, the inner hole on the inlet side or the back cover side is aligned with the shaft outer diameter, and combined with the key for torque transmission. , the unbalance of the rotor changes greatly after disassembly

Method used

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Examples

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Embodiment Construction

[0020] Such as Figure 1-7 Shown, the embodiment of the present invention. It includes impeller 1, shaft 2, shaft end nut 3, bolt connecting rod 4, locking washer 5 and tolerance ring 6. The first inner fitting section 1.1 and the second inner fitting section 1.4 on the front and rear sides of the first torsion transmission structure 1.3 of the impeller 1 are respectively processed to the required dimensional accuracy, and the first outer fitting section 2.3 and the second The second outer fitting section 2.4 is respectively processed to the required dimensional accuracy. The impeller 1 processes the first torsion transmission structure 1.3, and the shaft 2 processes the second torsion transmission structure 2.2 corresponding to the first torsion transmission structure 1.3. The impeller 1 and the shaft 2 cooperate to transmit torsion through the first torsion transmission structure 1.3 and the second torsion transmission structure 2.2. . The first inner fitting section 1.1,...

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PUM

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Abstract

The invention discloses a shafting assembly structure. Comprising an impeller, a shaft, a shaft end nut, a bolt connecting rod, a locking gasket and a tolerance ring. And the impeller and the shaft are matched through a flat key, a spline or a multi-profile to transmit torque. The method is characterized in that a proper matching size is selected, and at least one pair of parts such as the impeller, the shaft, the shaft end nut and the bolt connecting rod is in dual matching, so that the centering precision is ensured. And compared with a traditional one-time matching mode, the centering precision is improved. Through the measures, the repeatability of the dynamic balance precision of the high-rotating-speed and large-diameter turbine unit after disassembly and assembly is guaranteed, and safe and stable operation of equipment is guaranteed.

Description

technical field [0001] The invention relates to a shaft assembly structure, which belongs to the technical field of rotary impeller machinery. Background technique [0002] Generally, the connection methods of rotary impeller machines and shafts can be roughly divided into interference fit, face tooth fit, multi-profile fit and key fit. The interference fit generally requires heating or hydraulic pressure to assemble the impeller to the main shaft, and the torque is transmitted through the friction force generated by the extrusion force of the contact surface. The neutrality is good, but the disassembly and assembly of the impeller is inconvenient. The end-face tooth fit and multi-shaped face fit have an automatic centering function, which can meet the alignment requirements and high-torque operation, but requires high machining accuracy. Considering the convenience of disassembly, centering requirements and processing economy, generally the impeller and shaft adopt key fit...

Claims

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Application Information

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IPC IPC(8): F04D29/20F04D29/60F04D29/043F04D29/044
CPCF04D29/20F04D29/605F04D29/043F04D29/044
Inventor 范佰涛戴侃郑昂刘龙龙侯杰王小华
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD