CN216905774U

CN216905774U - Heat dissipation subrack with thermal interface material linkage application function

Info

Publication number: CN216905774U
Application number: CN202220192928.4U
Authority: CN
Inventors: 徐鹏飞; 唐文辉; 郁圣杰; 程宇梁
Original assignee: 724th Research Institute of CSIC
Current assignee: 724th Research Institute of CSIC
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-07-05
Anticipated expiration: 2032-01-25

Abstract

The invention discloses a heat dissipation subrack with a thermal interface material linkage coating function. Go up the cold drawing and set up array step arch with cold drawing down, go up the cold drawing, form the cavity behind cold drawing and the curb plate welded molding down, go up the step arch of cold drawing and cold drawing down and form the slot, the device is executed in the fixed thermal interface material linkage of one side of slot, the fixed locking mechanism of opposite side. The thermal interface material linkage applying device evenly applies the thermal interface material to the surface of the VPX module when the VPX module is pushed into the plug box along the slot, and the VPX module is screwed with the locking mechanism after being inserted in place, so that a low-thermal-resistance transmission passage of the VPX module shell to the upper cold plate and the lower cold plate is formed. The heat dissipation subrack provided by the invention can realize automatic, quantitative and uniform application of the thermal interface material when the VPX module is repeatedly plugged, strengthen the heat dissipation capability and improve the heat dissipation reliability.

Description

Heat dissipation subrack with thermal interface material linkage application function

Technical Field

The invention relates to the technical field of electronic equipment thermal management.

Background

The plug-in box is used as a structure and a heat dissipation carrier of an electronic device and is widely applied to the fields of communication, national defense and the like. Along with the high-speed development of electronic information technology, the heat flow density and the heat dissipation capacity of an electronic device are rapidly improved, the requirements on the volume and the weight of a heat dissipation system are more and more strict, the heat dissipation capacity in the unit volume of a traditional air cooling mode VPX plug box is limited, the temperature control requirements of subsequent high-performance products are difficult to meet, and the liquid cooling plug box gradually becomes the key direction of the next-stage technical development.

The utility model discloses a chinese utility model patent of publication number "202603120U" discloses a heat dissipation subrack, and this heat dissipation subrack includes subrack and inserted block, and the inserted block inserts the subrack by the heat conduction strip at its both ends, install U type protection shield between subrack and the heat conduction strip, this protection shield curb plate is the fretwork form, and another curb plate bottom is curved convex, and the fretwork form of protection shield is equipped with soft heat conduction liner between curb plate and the heat conduction strip, install the latch strip on the subrack, and this latch strip pastes for the mutually of the curb plate of curved convex with the bottom of protection shield. A soft heat-conducting gasket with lower thermal resistance value is additionally arranged between the insert block and the thermal contact surface of the insert box, so that the soft contact between the insert block and the thermal contact surface of the insert box is realized, the original contact gap between the insert block and the insert box is eliminated, the thermal contact resistance is reduced, and the thermal reliability is improved. However, the following disadvantages are also present: 1. two heterogeneous materials, namely a heat-conducting gasket and a U-shaped plate, exist between the plug block and the plug box, three heat-conducting interfaces exist, particularly the U-shaped plate and the plug box are in metal dry contact, and contact thermal resistance is additionally introduced. 2. The thickness of the soft heat conducting gasket is limited, and the comprehensive heat transfer resistance cannot be greatly reduced. 3. After the heat conducting gasket is plugged and pulled for many times, the soft heat conducting gasket is easy to generate plastic deformation, and the heat conducting effect is influenced.

The patent (CN106102418B) discloses a liquid-cooled VPX case efficient heat dissipation device and method based on a soaking plate, wherein a thermal interface material needs to be manually added between the soaking plate and a liquid-cooled cold plate, the influence of too much, too little or uniformity of the applied thermal interface material on actual contact thermal resistance is large, and the thermal interface material is easy to be ignored to be laid again every time in multiple plugging, so that the requirement of a manual adding mode on a line of operators is high, and the long-term stable and reliable operation of a heat dissipation plug box is not facilitated.

Disclosure of Invention

In order to solve the technical problem, the invention provides a heat dissipation subrack with a thermal interface material linkage coating function.

The technical scheme for realizing the invention is as follows:

a heat dissipation subrack with a thermal interface material linkage coating function comprises an upper cold plate, a lower cold plate, a side plate, a VPX module, a locking mechanism and a thermal interface material linkage coating device; the upper cold plate and the lower cold plate are provided with arrayed step bulges, the upper cold plate, the lower cold plate and the side plates are welded to form a cavity, the step bulges of the upper cold plate and the lower cold plate form a slot, one side of the slot is fixed with the thermal interface material linkage applying device, and the other side of the slot is fixed with the locking mechanism; the thermal interface material linkage applying device evenly applies the thermal interface material to the surface of the VPX module when the VPX module is pushed into the plug box along the slot, and the VPX module is screwed with the locking mechanism after being inserted in place, so that a low-thermal-resistance transmission passage of the VPX module shell to the upper cold plate and the lower cold plate is formed.

Preferably, the thermal interface material linkage applying device comprises a shell, a linkage wheel, a directional ratchet wheel, a gear, a rack, a slide rail, a piston, a thermal interface material, a wedge-shaped diversion port and a nylon brush; the linkage wheel, the directional ratchet wheel and the gear are coaxial and are arranged on the shell; the linkage wheel is fixed with the outer side of the directional ratchet wheel, and the gear is fixed with the inner side of the directional ratchet wheel; the gear is meshed with the rack; the sliding rail is fixed with the shell, a rack is arranged on the sliding rail, and the rack is connected with the piston; the piston and the shell form a cavity, and the cavity is filled with a thermal interface material; the wedge-shaped diversion port is connected with the cavity, and the nylon brush covers the outlet of the wedge-shaped diversion port; when the VPX module is pushed into the plug box, the linkage wheel is driven to rotate, the piston extrudes the thermal interface material storage cavity, and the thermal interface material flows out of the coating structure; when the VPX module is pulled out of the plug box, the directional ratchet wheel cannot drive the central gear to rotate, and the position of the piston is fixed.

Preferably, the nylon bristles have a diameter of 0.1 to 0.2mm and a length of 5 to 10 mm.

Preferably, the linkage wheel is wrapped with rubber, and grooves are formed in the rubber to increase friction.

Compared with the prior art, the invention has the following advantages:

the invention provides an efficient heat dissipation plug box, which can realize automatic, quantitative and uniform application of a thermal interface material when a VPX module is repeatedly plugged and pulled, a low-thermal-resistance heat transfer path is constructed between the VPX module and a liquid cooling plug box, the heat dissipation capacity of the VPX module is enhanced, the flow requirement of operators on the application of the thermal interface material can be effectively reduced, and the long-term reliability of heat dissipation is improved.

Drawings

FIG. 1 is a schematic view of the apparatus of the present invention.

FIG. 2 is a schematic view of a thermal interface material linkage coating device of the present invention.

The figure includes an upper cold plate 1, a lower cold plate 2, a side plate 3, a VPX module 4, a locking mechanism 5, a thermal interface material linkage applying device 6, a shell 61, a linkage wheel 62, a directional ratchet wheel 63, a gear 64, a rack 65, a slide rail 66, a piston 67, a thermal interface material 68, a wedge-shaped diversion port 69 and a nylon brush 610.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of the device of the present invention, which includes an upper cold plate 1, a lower cold plate 2, a side plate 3, a VPX module 4, a locking mechanism 5, and a thermal interface material linkage applying device 6. The upper cold plate 1 and the lower cold plate 2 are provided with arrayed step bulges, the upper cold plate 1, the lower cold plate 2 and the side plate 3 are welded and formed to form a cavity, the step bulges of the upper cold plate 1 and the lower cold plate 2 form a slot, one side of the slot is fixed with a thermal interface material linkage coating device 5, and the other side is fixed with a locking mechanism 5; the thermal interface material linkage applying device 5 evenly applies the thermal interface material to the surface of the VPX module when the VPX module is pushed into the plug box along the 4 slots, and the VPX module 4 is screwed with the locking mechanism 5 after being plugged in place, so that a low-thermal-resistance transmission passage of the VPX module shell to the upper cold plate and the lower cold plate is formed. When the VPX module 4 needs to be pulled out, the locking mechanism 5 is firstly loosened, and then the VPX module 4 is pulled out along the slot direction.

Fig. 2 is a schematic diagram of a thermal interface material linkage applying device of the present invention, which includes a housing 61, a linkage wheel 62, a directional ratchet 63, a gear 64, a rack 65, a slide rail 66, a piston 67, a thermal interface material 68, a wedge-shaped diversion port 69, and a nylon brush 610. The linkage wheel 61, the directional ratchet wheel 62 and the gear 63 are coaxial and are arranged on the shell 61. Rubber is wrapped outside the linkage wheel 61, and grooves are formed in the rubber to increase friction. The linkage wheel 62 is fixed with the outer side of the directional ratchet wheel 63, and the gear 64 is fixed with the inner side of the directional ratchet wheel 63; when the linkage wheel 62 rotates anticlockwise, the gear 64 rotates anticlockwise; when the linkage wheel 62 rotates clockwise, the gear 64 does not rotate. The gear 64 is engaged with a rack 65, the slide rail 66 is fixed with the housing 61, the rack 65 is mounted on the slide rail 66, and the rack 65 can slide in the slide rail 66. Rack 64 is rigidly connected to piston 67. The piston 67 and the housing 61 form a cavity, which is filled with a thermal interface material 68. A wedge-shaped deflector 69 is connected to the chamber and a nylon brush 610 covers the wedge-shaped deflector outlet 69. The diameter of the bristles of the nylon brush 610 is 0.15mm, the length of the bristles is 8mm, and the length direction of the bristles exceeds the plane of the boss 21 of the cold plate by 5 mm. The locking device 5 is arranged on the boss 21 of the lower cold plate, the distance between the side edge of the VPX module 4 and the boss 21 is 3mm when the locking device is in a locking state, and the shell 61 and the boss 21 are arranged on the same plane. When the VPX module 4 is pushed into the inserting box, the linkage wheel 62 is driven to rotate, the piston 67 extrudes the thermal interface material storage cavity, the thermal interface material 68 flows out of the coating structure, and the thermal interface material is uniformly coated on the surface of the VPX module 4 under the action of the nylon brush 610; when the VPX module 4 is pulled out of the plug box, the directional ratchet 63 cannot drive the gear 64 to rotate, and the position of the piston 67 is fixed.

Claims

1. The utility model provides a heat dissipation subrack with function is executed in thermal interface material linkage which characterized in that: the device comprises an upper cold plate, a lower cold plate, a side plate, a VPX module, a locking mechanism and a thermal interface material linkage coating device; the upper cold plate and the lower cold plate are provided with arrayed step bulges, the upper cold plate, the lower cold plate and the side plates are welded to form a cavity, the step bulges of the upper cold plate and the lower cold plate form a slot, one side of the slot is fixed with the thermal interface material linkage applying device, and the other side of the slot is fixed with the locking mechanism; the thermal interface material linkage applying device evenly applies the thermal interface material to the surface of the VPX module when the VPX module is pushed into the plug box along the slot, and the VPX module is screwed with the locking mechanism after being inserted in place, so that a low-thermal-resistance transmission passage of the VPX module shell to the upper cold plate and the lower cold plate is formed.

2. The thermal interface material gang application functional heat dissipation jack of claim 1, wherein: the thermal interface material linkage applying device comprises a shell, a linkage wheel, a directional ratchet wheel, a gear, a rack, a sliding rail, a piston, a thermal interface material, a wedge-shaped diversion port and a nylon brush; the linkage wheel, the directional ratchet wheel and the gear are coaxial and are arranged on the shell; the linkage wheel is fixed with the outer side of the directional ratchet wheel, and the gear is fixed with the inner side of the directional ratchet wheel; the gear is meshed with the rack; the sliding rail is fixed with the shell, a rack is arranged on the sliding rail, and the rack is connected with the piston; the piston and the shell form a cavity, and the cavity is filled with thermal interface materials; the wedge-shaped diversion port is connected with the cavity, and the nylon brush covers the outlet of the wedge-shaped diversion port; when the VPX module is pushed into the plug box, the linkage wheel is driven to rotate, the piston extrudes the thermal interface material storage cavity, and the thermal interface material flows out of the coating structure; when the VPX module is pulled out of the plug box, the directional ratchet wheel cannot drive the central gear to rotate, and the position of the piston is fixed.

3. The thermal interface material gang application functional heat dissipation jack of claim 2, wherein: the diameter of the nylon bristles is 0.1-0.2 mm, and the length of the nylon bristles is 5-10 mm.

4. The thermal interface material gang application functional heat dissipation jack of claim 2, wherein: rubber is wrapped on the outer side of the linkage wheel, and grooves are formed in the rubber to increase friction.