3results about How to "Same cooling effect" patented technology

This invention discloses a MEMS synthetic jet heat sink and array heat sink based on an asymmetric dual-diaphragm and a top-surface through-flow channel, comprising a PCB substrate, a silicon substrate, a first piezoelectric diaphragm, a second piezoelectric diaphragm, and a top frame. The lower surface of the PCB substrate is used for mounting to a heat source and is a complete plane; the silicon substrate is disposed on the PCB substrate, and a vibration cavity is formed within the silicon substrate; the first and second piezoelectric diaphragms are sealed and connected to the silicon substrate, and together enclose the vibration cavity; the two piezoelectric diaphragms are arranged asymmetrically relative to the PCB substrate; the top frame is disposed above the first and second piezoelectric diaphragms and connected to the PCB substrate; the top frame has an opening; the opening communicates with the vibration cavity, together forming a top-surface through-flow bidirectional channel, so that the air intake and exhaust processes of the heat sink are completed through the top-surface through-flow bidirectional channel.

This invention discloses a double-walled small bend tube and a recirculation combustion chamber, comprising an inner wall and an outer wall spaced apart. One end of the inner wall near the flame tube is connected to the other end of the outer wall near the flame tube. The inner and outer walls form a cavity for forming a cooling gas film. The outer wall has n rows of impact cooling holes for introducing cooling gas into the cavity. Each row of impact cooling holes is evenly distributed along the circumferential direction of the outer wall and has the same diameter. The diameter of the n rows of impact cooling holes increases gradually from the end of the outer wall near the flame tube to the end away from the flame tube, so that the flow rate of cooling gas impacting the inner wall increases gradually with the distance from the flame tube. This can effectively reduce the highest wall surface temperature at the end of the inner wall, reduce the ablation and uneven deformation of the double-walled small bend tube, extend its service life, and effectively solve the air leakage problem between the small bend tube and the casing under different vibrations and thermal expansion deformation, ensuring a seal.

The utility model provides a heat treatment cooling device for transmission shaft production, which comprises a roller conveyor, a mounting frame plate is arranged at the upper end of the roller conveyor, a plurality of cavity blocks are rotatably arranged in the mounting frame plate through a rotating column, and a plurality of upper water spraying holes are formed in the lower ends of the plurality of cavity blocks. Upper water spraying nozzles are arranged in the multiple upper water spraying holes, a collecting box is arranged at the lower end of the roller conveyor, a cavity frame is arranged in the collecting box, multiple lower water spraying holes are formed in the upper end of the cavity frame, a driving mechanism is arranged in the mounting frame plate, and the driving mechanism can drive the upper water spraying nozzles to shake back and forth in a reciprocating mode. According to the heat treatment cooling device for production of the transmission shaft, the spray head on the upper side can continuously shake back and forth in a reciprocating mode and is matched with the spray head at the lower end to spray water, the transmission shaft in the conveying process can be rapidly and evenly cooled, it is guaranteed that all parts can obtain the same cooling effect, and through even cooling, the production efficiency is improved. And stress concentration and deformation caused by local supercooling or overheating are avoided.