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Arc thread form threaded rolling wheel lead screw pair for nuclear reactor control rod driving mechanism

A driving mechanism and control rod technology, which is applied in the direction of mechanical equipment, transmission, belt/chain/gear, etc., can solve the problems of short life, weak and vulnerable parts, etc., and achieve the effect of improving service life, increasing quantity and eliminating interference

Inactive Publication Date: 2018-09-28
扬州众孚传动科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a circular-arc tooth-shaped threaded roller lead screw pair for the driving mechanism of nuclear reactor control rods, which solves the problem that the structure of the trapezoidal lead screw pair cannot meet the needs when it needs to carry a large load and high speed. The technical problem of weak wearing parts and short service life, the new arc-shaped thread roller screw pair structure of the present invention has a greater capacity to carry dynamic loads and a longer service life

Method used

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  • Arc thread form threaded rolling wheel lead screw pair for nuclear reactor control rod driving mechanism
  • Arc thread form threaded rolling wheel lead screw pair for nuclear reactor control rod driving mechanism
  • Arc thread form threaded rolling wheel lead screw pair for nuclear reactor control rod driving mechanism

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Embodiment 1

[0024] Such as figure 1 As shown, a circular-arc threaded roller screw pair used in the nuclear reactor control rod drive mechanism includes: left retaining ring 1, left steel ball 2, roller outer ring 3, right steel ball 4, right Side stop ring 5, support shaft 6, rotor 7, screw mandrel 8.

[0025] Both ends of the inner wall of the roller outer ring 3 are provided with arc-shaped raceways, and the outer wall of the roller outer ring 3 is provided with threads. Such as figure 2 and 3 As shown in , the thread profile is a convex arc tooth shape. It can be understood that the thread on the outer wall of the roller outer ring 3 can have a helix angle or no helix angle. The range of the included angle between the tangent line of the median point of the two arc surfaces of the thread profile is 30° to 150°, preferably 90°.

[0026] One side of the left retaining ring 1 and the right retaining ring 5 are all provided with arc-shaped raceways, and the arc-shaped raceways of the...

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Abstract

The invention provides an arc thread form threaded rolling wheel lead screw pair for a nuclear reactor control rod driving mechanism. The lead screw pair comprises a plurality of rolling wheel assemblies, a rotor and a screw rod, wherein each rolling wheel assembly comprises a rolling wheel outer ring, two check rings and two groups of steel balls; and the rolling wheel assemblies are uniformly distributed in a square groove at the shaft end of the rotor, and are uniformly arranged in the circumferential direction, the screw rod is arranged in the hollow inner wall of the rotor, and the plurality of rolling wheel assemblies are uniformly arranged in the circumference direction of the screw rod. Compared with an original lead screw pair of a trapezoid structure, the convex arc thread form has a smaller thread pitch, so that interference is eliminated, more bearing is achieved, the service life is longer, and the leas screw is more reliable.

Description

technical field [0001] The invention belongs to the technical field of nuclear machinery, and in particular relates to an arc-shaped threaded roller screw pair used in a nuclear reactor control rod drive mechanism. Background technique [0002] At present, the commonly used roller screw pair adopts trapezoidal tooth shape to transmit motion, which has meshing interference and short life. The roller screw pair of the nuclear reactor control rod driving mechanism of the present invention can not only bear the radial load, but also bear the axial load, and can also bear the radial load and the axial load at the same time. Compared with the original trapezoidal screw pair, it eliminates the Interference, arc-shaped thread rollers and screw rods are combined to form a screw pair structure that can be separated and closed, not stuck, large load, and highly reliable, which greatly improves the life and reliability. Contents of the invention [0003] The object of the present inv...

Claims

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Application Information

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IPC IPC(8): F16H25/22F16H25/24
CPCF16H25/2204F16H25/24
Inventor 王建波王建武王小波黄银
Owner 扬州众孚传动科技有限公司
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