Selection method for reactor kingbolt to screw in rotation speed value

A technology of rotating speed and main bolt, which is applied in the mechanical field, can solve the problems such as the bad effect of the main bolt, achieve the effect of overcoming contingency and unpredictability, and improving reliability and quality

Active Publication Date: 2013-06-05
NUCLEAR POWER INSTITUTE OF CHINA +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the technical defects of the prior art that judges the screw-in speed of the main bolt by experience and estimation, which causes various adverse effects during the installation process of the main bolt, the present invention provides a method for selecting the screw-in speed value of the reactor main bolt

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  • Selection method for reactor kingbolt to screw in rotation speed value
  • Selection method for reactor kingbolt to screw in rotation speed value

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Embodiment Construction

[0020] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The method for selecting the rotating speed value of the main bolt of the reactor according to the present invention comprises the following steps:

[0022] Step 1. Calculate and measure the moment of inertia J according to the geometric characteristics of the main bolt, measure and calculate the matching clearance δ and pitch P of the thread pair;

[0023] Step 2. According to n 2 =M*δ / K to calculate the screw-in speed, where K=2πJP / 3600, M is the allowable maximum torque of the reactor bolts, n is the screw-in speed, the unit is rev / min.

[0024] The present invention measures various parameters of the main bolt and the screw hole in step 1, and calculates the stuck time of the main bolt when it is screwed in. Due to the discrete individual differences in the manufacturing process of the components, the threads of the main...

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Abstract

A selection method for a reactor kingbolt to screw in a rotation speed value comprises the following steps: (1) calculating a rotational inertia J, measuring a thread deputy fit clearance delta and screw pitch P according to the geometric characteristic of the kingbolt, and (2) calculating screwing-in speed according to n2=M*delta /K, wherein the K is equal to 2PiJP/3600, the M is the allowed maximum torque of a reactor bolt, the n is the screwing-in speed, and a unit is turn per minute. The selection method for the reactor kingbolt to screw in the rotation speed value is adopted, the contingency and the unpredictability that a traditional technology is dependent on experience and an estimation method are overcome, and reliability and safety of installation of the reactor kingbolt are improved.

Description

technical field [0001] The invention belongs to the field of machinery and relates to a method for selecting a rotating speed value of a main bolt of a reactor. Background technique [0002] The installation of the main bolts of the nuclear power plant reactor is a key process in the process of installing the top cover of the new reactor pressure vessel or the pressure vessel during the overhaul of the power plant. Although everyone is very careful and careful about the installation of the main bolts, at home and abroad, judging the screw-in speed based on experience, the phenomenon of jamming, destruction, removal and damage to the main screw hole during the installation process of the main bolt occurs from time to time. [0003] There are screw holes on the reactor pressure vessel that match the main reactor bolts. During the batch manufacturing process of the screw holes on the reactor pressure vessel and the main reactor bolts, there are inevitable process deviations, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 胡运峰
Owner NUCLEAR POWER INSTITUTE OF CHINA
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