JPH039336Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a liquid-cooled heat sink in which a plurality of flat rectifying elements are stacked to be used in a high-power power source.

(Prior art) The conventional rectifying element stack for high power power supplies is
As shown in Figures a and b, a plurality of flat rectifying elements 1, such as thyristors and diodes, are sandwiched between a plurality of flat liquid-cooled heat sinks 2' each having parallel end surfaces with coolant flow passages inside, indicated as 21. The bolts 3, 3 and 40, 41, 4 are fixed in parallel to the connecting member 31 in a stacked manner so as to be attached to each other.
It is configured to be tightened by a spring nut mechanism 4 made up of 2 and 43.

In addition, 22 in the figure is a cooling liquid inlet and outlet, and 5, 5 is a bus bar connected to the liquid cooling heat sink.

(Problem to be solved by the invention) If the rectifying element and the liquid-cooled heat sink are not brought into even surface contact with a predetermined pressure, they will have subtle electrical and thermal effects, so ordinary nut tightening is not recommended. A spring-nut mechanism is used, but the premise is that all rectifying elements and liquid-cooled heat sinks must be centered.

However, as shown in the figure, the liquid-cooled heat sink has a flat contact surface with the rectifying element, which makes centering extremely difficult and requires a long time, which has been a problem.

(Purpose of the invention) The present invention solves the above problems and provides a rectifying element that not only allows easy and quick centering but also easily obtains parallelism of the rectifying element sandwiched between heat sinks. The purpose of the present invention is to provide a liquid cooling heat sink for stacks.

(Structure of the invention) The structure of the invention is as follows: (1) A plurality of flat rectifying elements are sandwiched between each other by a plurality of flat liquid-cooled heat sinks whose end surfaces are parallel to each other, and are fastened with bolts and nuts. In the case of configuring the rectifying element stack, (2) on the end surface of each of the liquid-cooled heat sinks that the cathode side of the rectifying element comes into contact with, insulating material is provided at a plurality of predetermined positions on a circumference of a predetermined diameter centered on the center position of the end surface; removably arrange cylindrical positioning pieces of a predetermined diameter and at least a height lower than the thickness of the rectifying element made of A liquid-cooled heat sink for a rectifying element stack, comprising insertion passages in which the bolts can be installed perpendicular to the end face at predetermined positions outside the circumference on a line passing through the center of the end face. be.

(Example) The present invention will be described in detail below according to an example shown in FIGS. 1 to 3c.

2 in FIG. 1 indicates the liquid cooling heat sink according to the present invention, and the other end surface 2 on the opposite side that cannot be seen in the diagram.
4 is smooth and has a coolant passage 21 inside.
It is similar to the conventional liquid-cooled heat sink that a hole is provided and the coolant flows through the coolant inlet 22, but in the present invention, the end face 23 on one side in the figure is the end face that the cathode side of the rectifying element 1 comes into contact with. As shown in FIG. A cylindrical member 6 made of material and having a height lower than at least the thickness of the rectifying element and a predetermined diameter is removably installed with a countersunk head screw or the like. The member 6 is a positioning piece, and the diameter of its cylindrical shape is selected and arranged according to the size of the collar 11, which is determined according to the capacity of the rectifying element 1 that contacts the liquid-cooled heat sink 2.

In addition, in the present invention, two adjacent positioning pieces 6 selected from a plurality of positioning pieces 6 provided on the circumference of the virtual circle C...in this case, 6 and 6 placed at points A and B... 3 passing through the center of symmetry O
The bolts 3,
Bolt insertion passages 7, 7 in which bolts 3 can be installed are provided. In this embodiment, the through holes have a diameter approximately equal to the outer diameter of the bolts 3 that are perpendicular to the parallel end surfaces 23 and 24 of the liquid-cooled heat sink 2.

(Other Embodiments) FIG. 2 shows another embodiment of the present invention. In this embodiment, the positioning pieces 6 are arranged not only at points A and B on the circumference of the virtual circle C, but also at point P, and may also be arranged at point Q as if stippled. It is shown that.

Also, among the three positioning pieces 6, the positioning pieces 6 placed at point A and point B are selected, and the positioning pieces 6 are placed on the line XX passing through the symmetrical end face center position O In this example, a cylindrical body 8 is installed on the side surface of the liquid-cooled heat sink 2 with its axis perpendicular to the parallel end surfaces 23 and 24 as an insertion passage 7 in which the bolt 3 is disposed at right angles to the parallel end surfaces 23 and 24 of the liquid-cooled heat sink 2. It is fixed and has an open inner hole. The inner diameter of the cylindrical body 8 is of course set approximately equal to the outer diameter of the bolt 3.

(Function of the invention) As described above, the present invention has a plurality of positioning pieces 6 removably disposed on one end surface 23 of the liquid-cooled heat sink 2, and furthermore, the positioning pieces 6 are arranged in a manner that the positioning pieces 6 are removably attached to the one end surface 23 of the liquid-cooled heat sink 2.
Since the rectifying element 1x, which has a flange 11x having a radius rx shown by a thick solid line in FIG. 3a, is placed on the end surface 23, for example, When centering in contact with each other, from the radius R of the virtual circle C to the tsuba 11x
Select the positioning piece 6x on the side periphery shown by the thick solid line whose radius is the value obtained by subtracting the radius rx of The rectifying element 1x will be automatically centered simply by bringing it into surface contact so that it abuts against the side periphery of each positioning piece 6x. FIG. 3b shows the thyristor in this state viewed from the side.

In addition, the tsuba 11y has a radius ry indicated by a dashed line.
When centering the rectifying element 1y equipped with a rectifying element 1y by abutting it on the end face 23, the side circumference shown by the dashed-dotted line whose radius is the value obtained by subtracting the radius ry of the collar 11y from the radius R of the virtual circle C. If the positioning piece 6y is selected and installed with a screw, the rectifying element 1y will be automatically centered just by abutting the flange 11y against the side circumference of the positioning piece 6y in the same manner as described above.

Furthermore, the tsuba 11z consisting of the radius rz shown by the dotted line
In the case of centering of the positioning piece 1z equipped with , it is the same as above if the positioning piece 6z on the side periphery shown by the dotted line whose radius is the value obtained by subtracting the radius rz of the tsuba 11z from the radius R of the virtual circle C is arranged. Automatic centering is possible. FIG. 3c shows a side view of the diode in this state.

In any of the above cases, the rectifying element 1 has a collar 11 on the cathode side, and the height of the positioning piece 6 is set lower than the thickness of the rectifying element 1. 23, the collar 11 does not come into contact with the side periphery of the positioning piece 6, and therefore the abutment position shifts greatly, so the error is immediately noticed.

Further, the present invention has a plurality of positioning pieces 6 as described above.
The bolts 3 can be arranged at right angles to the parallel end surfaces 23 and 24 on the outside of the circumference of the imaginary circle C on the line passing through the center position O of the liquid cooling heat sink 2, which is symmetrical to the two selected from among them. Bolt insertion passage 7
, the plurality of liquid cooling heat sinks 2 can be arranged in parallel by simply inserting the bolts 3 into the bolt insertion passages 7. Therefore, the parallelism of the rectifying element 1 which is sandwiched and centered between the liquid-cooled heat sinks 2 arranged in parallel is guaranteed, and the spring nut mechanism 4
By this tightening, uniform surface contact with a predetermined pressing force is ensured.

(Effects of the invention) By implementing the liquid-cooled heat sink according to the present invention, (1) centering when multiple rectifying elements are sandwiched between multiple liquid-cooling heat sinks and formed into a rectifying element stack by tightening bolts and nuts; (2) Furthermore, it has the versatility to accurately center rectifying elements of various sizes simply by changing the positioning pieces. (3) Moreover, no matter what size rectifying elements are used, a rectifying element stack with uniform surface contact pressure is formed, so good electrical and thermal results can be obtained. , the service life of the rectifying element is extended, and (4) the structure for obtaining the above effect is simple and does not require much cost.The resulting effects are extremely remarkable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the liquid cooling heat sink of the present invention, and FIG. 2 is a perspective view of another embodiment of the present invention.
Fig. 3a is a front view for explaining the operation of the present invention, Figs. 3b and c are side views showing the rectifying element in contact with the liquid cooling heat sink of the present invention, and Figs. 4a and b are respectively 1A and 1B are perspective views of a conventional rectifier stack and a conventional liquid-cooled heat sink, respectively. 1...Flat rectifier, 2...Liquid cooling heat sink, 3...Bolt, 4...Nut, 6...Positioning piece, 7...Insertion passage, 8...Cylinder body, O...End surface center position, C ...circumference.

Claims (1)

[Claims for Utility Model Registration] 1 A rectifier stack is constructed by stacking a plurality of flat rectifying elements so as to sandwich them between a plurality of flat liquid-cooled heat sinks whose end surfaces are parallel, and fastening them with bolts and nuts. In the case of
On the end surface of each of the liquid-cooled heat sinks that the cathode side of the rectifying element comes into contact with, a plurality of predetermined positions on a circumference of a predetermined diameter centered at the center position of the end surface are made of an insulating material and are at least thicker than the rectifying element. A plurality of sets of cylindrical positioning pieces each having a low height and different diameters are arranged in a manner that they can be replaced and removed, and the positioning piece is placed on a line passing through the center of the end face symmetrically between two selected adjacent positioning pieces among the plurality of positioning pieces. A rectifying element stack comprising push passages in which the bolts can be disposed perpendicular to the end face at predetermined positions outside the circumference, and the push passages for the bolts are through holes formed in the liquid cooling heat sink. liquid cooling heat sink. 2. A liquid-cooled heat sink for a rectifying element stack according to claim 1, wherein the passage for pushing the bolt is inside a cylinder fixed to the side surface of the liquid-cooled heat sink.