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A quick hydraulic stretching installation method for the main bolt of the main pump

An installation method and technology of hydraulic tensioner, which are applied in metal processing equipment, metal processing, manufacturing tools, etc., can solve the problems of long disassembly and assembly process of main bolts, difficult control of elongation, etc., and achieve precise control of elongation. , The effect of good fastening effect and high efficiency

Active Publication Date: 2022-02-18
东方法马通核泵有限责任公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The present invention provides a method for quickly installing the main bolts of the main pump by hydraulic stretching, which solves the problem that the main bolts of the main pump are disassembled by using the heat tightening method of the bolt heater. technical issues

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  • A quick hydraulic stretching installation method for the main bolt of the main pump
  • A quick hydraulic stretching installation method for the main bolt of the main pump
  • A quick hydraulic stretching installation method for the main bolt of the main pump

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Embodiment Construction

[0032] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

[0033] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the present invention is used, or the technic...

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Abstract

The invention provides a method for quickly installing the main bolts of the main pump by hydraulic stretching, which solves the technical problems that the main bolts of the main pump are disassembled by using a bolt heater thermal tightening method, which takes a long time and the elongation is difficult to control. A hydraulic stretching quick installation method for a main bolt of a main pump, comprising the following steps: S1. measuring the length J0 between the upper surface of the locking device of the main bolt and the upper surface of the length measuring rod; S2. dividing several main bolts into at least Two groups; S3. Stretch the first group of main bolts to make the elongation reach 50% of the required elongation; S4. Stretch the second group of main bolts first to make the elongation reach the required elongation 100% of the amount; S5. Stretch the main bolts of the first group again to make the elongation reach 100% of the required elongation; S6. After completing the tightening of the two sets of main bolts, measure the residual of all main bolts Elongation Jf3; S7. When the elongation of the main bolts does not reach the required elongation, use the formula and calculate the ratchet rotation angle that needs to be adjusted until all the main bolts reach the required elongation.

Description

technical field [0001] The invention relates to the technical field of bolt fastening, in particular to a method for quickly installing a main bolt of a main pump through hydraulic stretching. Background technique [0002] The hydraulic components of the main pump are installed on the pump casing through 24 main bolts. Usually, the main bolts are fastened by thermal stretching by the main bolt heater, which will involve repeated thermal stretching of the main bolts. Through a long-term comprehensive analysis of the main bolt hot-stretching process of the main pump, the main bolt hot-stretching process has the following problems: [0003] 1. It takes a long time: during the installation of the main pump, the main bolts are heated at least 12 times, and the calculation is based on the cooling time of each group of 16 hours, a total of 192 hours. If the elongation of the main bolt after heat tightening does not meet the requirements, the main bolt needs to be reheated and adju...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P19/06B25B29/02
CPCB23P19/067B25B29/02
Inventor 李俭君杜宇
Owner 东方法马通核泵有限责任公司
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