CN213744350U

CN213744350U - Taper sleeve of expansion bolt for thermonuclear fusion reactor

Info

Publication number: CN213744350U
Application number: CN202022131884.8U
Authority: CN
Inventors: 魏海鸿; 李鹏远; 张腾; 孙振超; 罗蓉蓉; 康道安; 邓华林
Original assignee: Southwestern Institute of Physics
Current assignee: Southwestern Institute of Physics
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-07-20
Anticipated expiration: 2030-09-25

Abstract

The utility model belongs to the technical field of mechanical fastener, concretely relates to expansion bolts's for thermonuclear fusion reactor taper sleeve, this taper sleeve include taper sleeve thin wall end, taper sleeve thick wall end, expansion tank and elliptical hole, and taper sleeve thin wall end and taper sleeve thick wall end are tubular structure, taper sleeve thin wall end and taper sleeve thick wall end integrated into one piece, and taper sleeve thin wall end and taper sleeve thick wall end surface are evenly opened there is the expansion tank, and the end of expansion tank is opened there is the elliptical hole. The expansion groove of the middle taper sleeve can improve the uniformity of radial expansion displacement and avoid overlarge local stress; the expansion displacement of the two ends is restrained by the reverse arrangement of the adjacent expansion grooves, so that the maximum expansion amount is positioned in the middle section of the taper sleeve, the interface area of the assembly part is ensured to be in complete contact with the taper sleeve, the aim of resisting the relative displacement of the assembly part is fulfilled, and the assembly effectiveness is enhanced; the tail end of the expansion groove is provided with the elliptical hole, so that the problem of stress concentration of the tail end can be greatly relieved.

Description

Taper sleeve of expansion bolt for thermonuclear fusion reactor

Technical Field

The utility model belongs to the technical field of mechanical fastener, concretely relates to expansion bolts's for thermonuclear fusion reactor taper sleeve.

Background

In the magnet support system of the international thermonuclear fusion device, it is necessary to fix the bottom clamping plate of the correction field coil box on the toroidal field coil box. In order to ensure the assembly precision, each clamping plate needs to be assembled and positioned through 4 groups of expansion bolts. The bolt is in interference fit with the assembling hole in a radial expansion mode, so that the connecting part can be ensured not to generate instantaneous transverse relative displacement under the accidents of plasma large breakage, vertical displacement time, magnet quench and the like, repeated shearing impact load is avoided, the fatigue life of the material is shortened, and the risks of connection failure and bolt breakage are effectively reduced.

The taper sleeve is the most important part in the expansion connection relation of the bolt assembly, and the performance of the taper sleeve directly influences the reliability of connection. In actual assembly and test, the taper sleeve used at present is only provided with two grooves in the thin-wall direction, so that the uniformity of expansion displacement is not easy to ensure; the entire outer wall surface of the taper sleeve is fitted to the fitting hole, but it is difficult to achieve the intended effect in practice due to the influence of manufacturing tolerances.

Therefore, the taper sleeve of the expansion bolt for the thermonuclear fusion reactor needs to be provided to solve the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a taper sleeve of expansion bolt for thermonuclear fusion reactor improves the homogeneity of inflation displacement, satisfies the assembly demand of magnet support component during the life-span of being active service.

Realize the utility model discloses the technical scheme of purpose:

the taper sleeve comprises a taper sleeve thin-wall end, a taper sleeve thick-wall end, expansion grooves and elliptical holes, wherein the taper sleeve thin-wall end and the taper sleeve thick-wall end are of cylindrical structures, the taper sleeve thin-wall end and the taper sleeve thick-wall end are integrally formed, the expansion grooves are uniformly formed in the outer surfaces of the taper sleeve thin-wall end and the taper sleeve thick-wall end, and the elliptical holes are formed in the tail ends of the expansion grooves.

The thick wall end of the taper sleeve is of a tapered cylindrical structure, and the taper of the outer wall is 12 degrees.

The taper angles of the inner walls of the thin-wall end and the thick-wall end of the taper sleeve are both 6 degrees.

The connection part of the thin-wall end of the taper sleeve and the thick-wall end of the taper sleeve is in transition through an arc.

The wall thickness of the thin-wall end of the taper sleeve is 1.5mm, and a chamfer angle is formed at the edge.

The expansion grooves are even in number, and the grooving directions are opposite to each other.

The width of the expansion groove is 1 mm.

The long axis of the elliptical hole is vertical to the direction of the expansion groove.

The utility model has the advantages of:

(1) the utility model discloses guaranteed that the hoop atress in the taper sleeve assembling process is even, increased the area of contact of the inside and outside both sides as far as possible, improved the complex reliability.

(2) The expansion groove of the middle taper sleeve can improve the uniformity of radial expansion displacement and avoid overlarge local stress; the expansion displacement of the two ends is restrained by the reverse arrangement of the adjacent expansion grooves, so that the maximum expansion amount is positioned in the middle section of the taper sleeve, the interface area of the assembly part is ensured to be in complete contact with the taper sleeve, the aim of resisting the relative displacement of the assembly part is fulfilled, and the assembly effectiveness is enhanced; the tail end of the expansion groove is provided with the elliptical hole, so that the problem of stress concentration of the tail end can be greatly relieved.

(3) The thick wall end of the middle taper sleeve has certain outer wall taper, so that the condition that the rigidity is too large and expansion displacement cannot be generated is avoided; the thin-walled end chamfer alleviates the problem of excessive end stress during assembly.

Drawings

Fig. 1 is a schematic structural diagram of a taper sleeve of an expansion bolt for a thermonuclear fusion reactor provided by the present invention;

FIG. 2 is a schematic view of the assembly of the drogue during use;

in the figure: 1-taper sleeve thin wall end; 2-taper sleeve thick wall end; 3-an expansion tank; 4-elliptical hole; 5-taper bolt; 6-spacer bush; 7-a toroidal field coil box; 8-bottom splint.

Detailed Description

In order to make those skilled in the art better understand the present invention, the technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be apparent that the embodiments described below are only some, but not all embodiments of the present invention. Based on the embodiments recorded in the present invention, all other embodiments obtained by those skilled in the art without creative efforts are all within the scope of the present invention.

The following provides a more detailed description of the present invention.

As shown in fig. 1, the utility model provides a taper sleeve of expansion bolt for thermonuclear fusion reactor, this taper sleeve include taper sleeve thin wall end 1, taper sleeve thick wall end 2, expansion tank 3 and elliptical hole 4, and taper sleeve thin wall end 1 and taper sleeve thick wall end 2 are the tubular structure, and taper sleeve thin wall end 1 and taper sleeve thick wall end 2 integrated into one piece, and taper sleeve thin wall end 1 and taper sleeve thick wall end 2 surface evenly open have expansion tank 3, and expansion tank 3's end is opened there is elliptical hole 4.

The taper sleeve thick wall end 2 is of a taper cylindrical structure, the taper of the outer wall is 12 degrees, and the joint of the taper sleeve thin wall end 1 and the taper sleeve thick wall end 2 is in transition through an arc.

The taper angles of the inner walls of the taper sleeve thin-wall end 1 and the taper sleeve thick-wall end 2 are both 6 degrees.

The wall thickness of the thin-wall end 1 of the taper sleeve is 1.5mm, and a chamfer angle of 0.5mmx45 degrees is arranged at the edge.

The outer surfaces of the taper sleeve thin-wall end 1 and the taper sleeve thick-wall end 2 are uniformly provided with expansion grooves 3, the number of the expansion grooves 3 is even, the grooving directions are opposite, and the width of each expansion groove 3 is 1 mm.

The major axis of the elliptical hole 4 is perpendicular to the direction of the expansion tank 3.

The expansion groove 3 can improve the uniformity of radial expansion displacement and avoid overlarge local stress; the expansion displacement of the two ends is restrained by the reverse arrangement of the adjacent expansion grooves 3, so that the maximum expansion amount is positioned in the middle section of the taper sleeve, the interface area of the assembly part is ensured to be in complete contact with the taper sleeve, the aim of resisting the relative displacement of the assembly part is fulfilled, and the assembly effectiveness is enhanced; the tail end of the expansion groove 3 is provided with the elliptical hole 4, so that the problem of stress concentration of the tail end can be greatly relieved.

As shown in fig. 2, when in use, the taper sleeve 6, the taper bolt 5 and the spacer 6 form an expansion bolt assembly, and the expansion bolt assembly is installed in cooperation with the annular field coil box 7 and the bottom clamping plate 8. The annular field coil box 7 is coaxial with the assembling hole of the bottom clamping plate 8, and the taper sleeve 6 is assembled on the outer side of the conical section of the taper bolt 5 and can generate axial relative displacement with the taper bolt 5.

When the taper sleeve is used, the relative positions of the annular field coil box 7 and the bottom clamping plate 8 are adjusted in advance, and the coaxiality of assembling holes is ensured; then the taper sleeve is assembled on the taper section of the taper bolt 5 and penetrates through the assembly holes of the annular field coil box 7 and the bottom clamping plate 8, then a group of locknuts and gaskets are assembled on the large-diameter end of the taper bolt 5, and then the spacer sleeve 6 is sleeved in from the small-diameter end of the taper bolt 5 to be in contact with the thick-wall end 2 of the taper sleeve. And finally, assembling the other group of locknuts and gaskets at the small-diameter end of the taper bolt 5, applying pretightening force to push the spacer bush 6 to move towards the large-diameter end, so that the taper bush 6 generates axial displacement and radial expansion, and simultaneously, the contact area between the spacer bush and the taper bolt 5, the annular field coil box 7 and the bottom clamping plate 8 is increased, and the purpose of interference fit is achieved.

The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the above examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. The present invention can adopt the prior art for the content which is not described in detail in the present invention.

Claims

1. The utility model provides a taper sleeve of expansion bolts for thermonuclear fusion reactor which characterized in that: the taper sleeve comprises a taper sleeve thin-wall end (1), a taper sleeve thick-wall end (2), expansion grooves (3) and elliptical holes (4), wherein the taper sleeve thin-wall end (1) and the taper sleeve thick-wall end (2) are of cylindrical structures, the taper sleeve thin-wall end (1) and the taper sleeve thick-wall end (2) are integrally formed, the expansion grooves (3) are uniformly formed in the outer surfaces of the taper sleeve thin-wall end (1) and the taper sleeve thick-wall end (2), and the elliptical holes (4) are formed in the tail ends of the expansion grooves (3).

2. The taper sleeve of the expansion bolt for the thermonuclear fusion reactor, according to claim 1, is characterized in that: the taper sleeve thick wall end (2) is of a tapered cylindrical structure, and the taper of the outer wall is 12 degrees.

3. The taper sleeve of the expansion bolt for the thermonuclear fusion reactor as claimed in claim 2, characterized in that: the taper angles of the inner walls of the taper sleeve thin-wall end (1) and the taper sleeve thick-wall end (2) are both 6 degrees.

4. The taper sleeve of the expansion bolt for the thermonuclear fusion reactor as claimed in claim 3, characterized in that: the connecting part of the taper sleeve thin wall end (1) and the taper sleeve thick wall end (2) is transited through an arc.

5. The taper sleeve of the expansion bolt for the thermonuclear fusion reactor, according to claim 4, is characterized in that: the wall thickness of the thin-wall end (1) of the taper sleeve is 1.5mm, and a chamfer angle is formed at the edge.

6. The taper sleeve of the expansion bolt for the thermonuclear fusion reactor, according to claim 5, is characterized in that: the expansion grooves (3) are even in number, and the grooving directions are opposite to each other.

7. The taper sleeve of the expansion bolt for the thermonuclear fusion reactor, according to claim 6, is characterized in that: the width of the expansion groove (3) is 1 mm.

8. The taper sleeve of the expansion bolt for the thermonuclear fusion reactor, according to claim 7, is characterized in that: the long axis of the elliptical hole (4) is vertical to the direction of the expansion groove (3).