Protective shaft sleeve
A technology for protecting shaft sleeves and sleeves, applied in the field of protecting shaft sleeves, can solve the problems of difficult control of machining dimensional accuracy, unstable pump operation, troublesome assembly and replacement, etc.
Inactive Publication Date: 2011-04-13
江苏海天科技有限公司
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Problems solved by technology
[0002] In the production and processing process of the pump shaft and the shaft sleeve of the magnetic drive pump, due to the different temperature of the conveyed medium, the fit clearance between the pump shaft and the shaft sleeve is different, and the processing dimensional accuracy is difficult to control, and it must be accurately Measure the ambient temperature where the magnetic pump works, and the margin of thermal expansion and contraction generated, and such parts cannot be interchanged and installed as general parts, and it is easy to make mistakes when sending parts, which will affect the normal operation of the pump , if the same matching size is used, the operation is stable at room temperature, and the thermal expansion rate of the pump shaft and the shaft sleeve is inconsistent at high temperature, resulting in an increase in the fit gap between the pump shaft and the shaft sleeve, which makes the pump operation very unstable and affects the use of the pump life
If the expansion coefficient at high temperature is used to design the fit gap between the pump shaft and the shaft sleeve, the pump will be difficult to assemble at room temperature, and the material of the shaft sleeve is usually hard alloy or silicon carbide, which is easily broken during assembly. There are also some manufacturers who use spring expansion rings or spring expansion sleeves, but it is difficult to produce and process spring expansion rings and spring expansion sleeves, which require wire cutting machine processing or special mold stamping and rolling forming, and the size is difficult to control and Difficult to measure, assemble and replace
Method used
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[0006] Below in conjunction with accompanying drawing, the present invention will be further described;
[0007] In the figure, the shaft protection sleeve is composed of a pump shaft sleeve 1 and a connecting sleeve 3. It is characterized in that: the pump shaft sleeve 1 is designed at both ends of the connecting sleeve 3, and the inner diameter of the pump shaft sleeve 1 is the same as that of the pump shaft 2. Fit according to the normal matching size tolerance; the inner diameter of the connecting sleeve 3 is larger than the diameter of the pump shaft 2, and the outer diameter of the connecting sleeve 3 and the inner diameter of the shaft sleeve 4 are matched according to the normal matching size tolerance. In the specific implementation, the design of the shaft sleeve is as follows: the two ends of the pump shaft sleeve are matched with the pump shaft according to the normal matching size tolerance with an appropriate length, the middle longer end connecting sleeve and the...
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The invention relates to a protective shaft sleeve comprising a pump shaft sleeve and a connecting sleeve. The inside diameter of the pump shaft sleeve is processed to be matched with that of a pump shaft according to normal dimensional tolerance match, and the outside diameter of the connecting sleeve is processed to be matched with the inside diameter of the shaft sleeve according to the normaldimensional tolerance match so as to prevent expansion caused by heat and contraction caused by cold of a product from bringing difficulty to the mounting and the use of the product, save the productcost and improve the efficacy.
Description
Technical field: [0001] The invention relates to a shaft protection sleeve used on a magnetic drive pump. Background technique: [0002] In the production and processing process of the pump shaft and the shaft sleeve of the magnetic drive pump, due to the different temperature of the conveyed medium, the fit clearance between the pump shaft and the shaft sleeve is different, and the processing dimensional accuracy is difficult to control, and it must be accurately Measure the ambient temperature where the magnetic pump works, and the margin of thermal expansion and contraction generated, and such parts cannot be interchanged and installed as general parts, and it is easy to make mistakes when sending parts, which will affect the normal operation of the pump , if the same matching size is used, the operation is stable at room temperature, and the thermal expansion rate of the pump shaft and the shaft sleeve is inconsistent at high temperature, resulting in an increase in the ...
Claims
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IPC IPC(8): F04C29/00F04B53/00F04D29/04F04C15/00F04D29/05
Inventor 黄佳华王明琪
Owner 江苏海天科技有限公司