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Method for preventing looseness through bolt length-diameter ratio

A technology of length-to-diameter ratio and bolts, which is applied in the direction of screws, threaded fasteners, connecting components, etc., can solve the problems that the length of bolts is not specified or reflected, so as to ensure the anti-loosening effect, reduce the difficulty of processing, and ensure the operation sexual effect

Inactive Publication Date: 2018-10-16
JEREH OIL & GAS ENG
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  • Claims
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AI Technical Summary

Problems solved by technology

However, equipment manufacturers generally only recommend the specifications of the matching bolts, but do not specify the length of the bolts. For users or skid manufacturers, what is the most suitable bolt length? Or, if the same specification and the same grade differ only in length, which length is more conducive to anti-loosening under heavy load or vibration conditions? This is an important issue in bolt strength design and engineering practice, but it is not reflected in any standard specifications at present

Method used

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  • Method for preventing looseness through bolt length-diameter ratio
  • Method for preventing looseness through bolt length-diameter ratio
  • Method for preventing looseness through bolt length-diameter ratio

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Embodiment Construction

[0019] Such as Figures 1 to 2 As shown, a method of using bolt length-to-diameter ratio to prevent loosening is achieved by changing the bolt installation environment to adjust the effective length of bolt installation and adjusting the bolt length-to-diameter ratio to achieve the purpose of bolt loosening during use. The effective length of the installation bolt refers to the bolt tightness The absolute thickness of the solid workpiece.

[0020] In the example figure 2 The bolts in the figure change the effective length of the bolts installed on the workpiece 1 by increasing the support plate 2 to enhance the anti-loosening performance. The start and end of the effective length are represented by A in the figure. In this embodiment, this method is used to illustrate a specific implementation of the method in the present invention. Situation, other similar methods of using the present invention to enhance the anti-loosening performance of bolts all belong to the protection ...

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Abstract

The invention provides a method for preventing looseness through the bolt length-diameter ratio. The mounting environment of a bolt is changed, the bolt mounting effective length is adjusted, the boltlength-diameter ratio is adjusted, and in the bolt use process, the looseness prevention aim is achieved; and the effective length of the mounting bolt is the absolute thickness of a workpiece fastened through the bolt. The method is different from a traditional friction anti-looseness, mechanical anti-looseness and permanent anti-looseness method, looseness prevention is achieved by increasing the bolt length, the machining difficulty is reduced, the number of used parts is small, and assembling is easy.

Description

technical field [0001] The invention relates to the field of anti-loosening design of bolts, in particular to a method for anti-loosening by using the length-to-diameter ratio of bolts. Background technique [0002] The operation of large-scale equipment is often accompanied by relatively large vibrations, and excessive vibration is often the direct cause of abnormal shutdown or damage of equipment. For dynamic load equipment, due to the impact of changes in load or working conditions, the equipment bears unbalanced forces and moments, and vibration cannot be completely avoided. Then the vibration must be transferred to the equipment base / foundation. At this time, the equipment and the base / foundation Whether the connection between them is fast becomes particularly important, and bolt connection is one of the most widely used connection methods. [0003] Bolts of different specifications and grades require different torques to provide pre-tightening forces that meet mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/00
CPCF16B35/00
Inventor 戴英良尹莎李冰程纪杰杜倩李朕
Owner JEREH OIL & GAS ENG
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