A high power density rack load

Abstract

The present invention relates to the field of load technology, and specifically to a high-power density rack-mounted load, comprising a box body and a resistor unit arranged in the box body, wherein the resistor unit comprises a plurality of parallel resistor rows, each resistor row comprises a plurality of insulating support plates, a locking assembly and a plurality of spiral resistor bars arranged at intervals, each insulating support plate has a plurality of support holes along its length direction, a plurality of resistor bars pass through the support holes respectively, and each resistor bar relies on its own strength to keep the center line as a straight line; a connecting plate is provided between the plurality of resistor rows, so that the plurality of resistor rows are arranged at intervals; the plurality of resistor bars of each resistor row and the plurality of resistor bars of the plurality of resistor rows are electrically connected to each other. The spiral resistor bar has a large area directly in contact with the air, a fast heat dissipation speed, and a large heat dissipation power per unit volume. The overall load has a small volume and a large power. Compared with a conventional rack-mounted load, the power can be expanded by two to three times under the same volume.

Description

Technical Field

[0001] The present invention relates to the technical field of loads, and in particular to a high power density rack-type load. Background Art

[0002] Load resistors are also called discharge resistors, brake resistors, brake resistors or absorption resistors due to their special functions. These resistors have high power and are generally non-inductive power resistors. No inductance and ultra-low inductance are important requirements for this type of product.

[0003] With the development of electronic power technology, there are more and more requirements for the use of loads. Since the load will generate more heat after being powered on, it is necessary to dissipate the heat of the load. When the load increases the resistance in the circuit to meet the high power requirements, the heat generated by the load will increase greatly, which can easily make the temperature of the load surface too high, affecting the normal use of the load. It is difficult for the existing load to meet the requirements of small size and high power at the same time. Summary of the invention

[0004] In view of the above technical problems existing in the prior art, the present invention provides a high power density rack-mounted load, which meets the requirements of high power, small size and good heat dissipation effect.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high power density rack-type load is provided, comprising a box body and a resistor unit arranged in the box body, wherein the resistor unit comprises a plurality of parallel resistor rows, each resistor row comprises a plurality of insulating support plates, a locking assembly and a plurality of spiral resistor bars, the locking assembly arranges the plurality of insulating support plates in a fixed manner at intervals, each insulating support plate is provided with a plurality of support holes along its own length direction, a plurality of resistor bars respectively pass through the support holes aligned with the plurality of insulating support plates, thereby the resistor bars are supported, and each resistor bar relies on its own strength to keep the center line as a straight line; connecting plates are provided between the insulating support plates of the plurality of resistor rows, thereby the plurality of resistor rows are arranged in a fixed manner at intervals; the plurality of resistor bars of each resistor row and the resistor bars of the plurality of resistor rows are electrically connected to each other.

[0007] Specifically, the locking assembly includes a screw and a nut. Each resistor row is provided with multiple limit tubes. The two ends of each limit tube are against the side walls of two adjacent insulating support plates. The screw passes through the connecting plate, the limit tube and multiple insulating support plates and then tightens the nut to lock the multiple insulating support plates.

[0008] Specifically, the limiting tube is a ceramic tube; or the limiting tube is a telescopic rod with adjustable length.

[0009] Specifically, the box body is provided with a partition plate, which divides the interior of the box body into a first accommodating chamber and a second accommodating chamber. The resistance unit is fixedly installed in the first accommodating chamber. The second accommodating chamber is provided with a fan for blowing air into the first accommodating chamber, and the fan is fixed to the partition plate.

[0010] Specifically, the side wall of the box body is provided with mesh-shaped heat dissipation holes.

[0011] Specifically, the insulating support plate is a mica plate.

[0012] Specifically, a U-shaped handle is provided on the outer side of the box body.

[0013] Specifically, the resistor strip is interference-fitted with the support hole of the insulating support plate.

[0014] Specifically, the inner wall of the supporting hole of the insulating supporting plate is provided with a thread groove, and the thread groove is matched with the thread of the resistor bar.

[0015] Beneficial effects of the present invention:

[0016] The high power density rack load of the present invention uses a spiral resistor strip as a heating element, which has a large area directly in contact with the air, a fast heat dissipation speed, and a large heat dissipation power per unit volume. Compared with traditional braided resistors, the process is simple, the cost is low, and it is easy to mass produce and assemble. The overall load volume is small and the power is large. Compared with conventional rack loads, the power can be expanded by two to three times under the same volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a high power density rack-mounted load in an embodiment.

[0018] Figure 2 The diagram is a schematic structural diagram of a high power density rack-mounted load in an embodiment with a partial housing hidden.

[0019] Figure 3 Schematic diagram of the structure of the resistor unit in the embodiment.

[0020] Reference numerals:

[0021] Box body 1, partition plate 11, handle 12, heat dissipation hole 13;

[0022] Resistor unit 2, insulating support plate 21, support hole 211, locking assembly 22, resistor bar 23, connecting plate 24, limiting tube 25;

[0023] Fan 3. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0025] The high power density rack load of this embodiment, such as Figures 1 to 3 As shown, it includes a box body 1 and a resistor unit 2 arranged in the box body 1, and the resistor unit 2 includes a plurality of parallel resistor rows. Figure 3 There are six resistor rows, each of which includes multiple insulating support plates 21, locking components 22 and multiple spiral resistor strips 23. The locking components 22 arrange the multiple insulating support plates 21 in a fixed manner. Each insulating support plate 21 has multiple support holes 211 along its length. Figure 3 Each insulating support plate 21 has six support holes 211, and multiple resistor bars 23 pass through the support holes 211 aligned with the multiple insulating support plates 21, so as to set up the resistor bars 23, and each resistor bar 23 relies on its own strength to keep the center line as a straight line, and the strength of the resistor bar 23 is reflected by its thickness and material. A connecting plate 24 is provided between the insulating support plates 21 of multiple resistor rows, so that multiple resistor rows are fixedly arranged at intervals. The multiple resistor bars 23 of each resistor row and the resistor bars 23 of multiple resistor rows are electrically connected to each other. This embodiment uses a spiral resistor bar 23 as a heating element, which has a large area directly in contact with the air, a fast heat dissipation speed, and a large heat dissipation power per unit volume. Compared with traditional braided resistors, the process is simple, the cost is low, it is easy to mass produce and assemble, the overall load volume is small, the power is large, and compared with conventional rack-type loads, the power can be expanded by two to three times under the same volume.

[0026] In this embodiment, the locking assembly 22 includes a screw and a nut. Each resistor row is provided with a plurality of limit tubes 25. The two ends of each limit tube 25 abut against the side walls of two adjacent insulating support plates 21. The screw passes through the connecting plate 24, the limit tube 25 and the plurality of insulating support plates 21 and then tightens the nut, thereby locking the plurality of insulating support plates 21. The resistor row is locked by a screw and supported by a limit tube 25, which plays a supporting role and also plays an insulating role. The insulating support plate 21 is a mica board, which is resistant to high temperature, has good insulation performance and a simple structure. The middle resistor strip 23 is fixed by a mica board as the insulating support plate 21, which is resistant to high temperature, has good insulation performance and a simple structure. The limit tube 25 of this embodiment is a ceramic tube with good insulation effect. In practice, the limit tube 25 can be changed into a telescopic rod with adjustable length, such as an umbrella-shaped rod body, which can flexibly adjust the distance between adjacent insulating support plates 21.

[0027] In this embodiment, the box body 1 is provided with a partition plate 11, which divides the interior of the box body 1 into a first accommodating chamber and a second accommodating chamber. The resistor unit 2 is fixedly installed in the first accommodating chamber, and the second accommodating chamber is provided with a fan 3 for blowing air to the first accommodating chamber, and the fan 3 is fixed to the partition plate 11. The surrounding side walls of the box body 1 are provided with mesh heat dissipation holes 13. The outer side of the box body 1 is provided with a U-shaped handle 12.

[0028] In this embodiment, the resistor bar 23 and the support hole 211 of the insulating support plate 21 are interference-fitted, so that the resistor bar 23 has a certain limit in the axial direction. In practice, the inner wall of the support hole 211 of the insulating support plate 21 can be changed to be provided with a thread groove, which is adapted to the thread of the resistor bar 23, and the resistor bar 23 is installed by rotation, which has better axial limit and a large contact and heat conduction area between the resistor bar 23 and the insulating support plate 21.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A high power density rack-mounted load, characterized by: It includes a box body and a resistor unit arranged in the box body, the resistor unit includes a plurality of parallel resistor rows, each resistor row includes a plurality of insulating support plates, a locking assembly and a plurality of spiral resistor bars, the locking assembly arranges the plurality of insulating support plates in a fixed manner at intervals, each insulating support plate has a plurality of support holes along its own length direction, the plurality of resistor bars respectively pass through the support holes aligned with the plurality of insulating support plates, thereby arranging the resistor bars, and each resistor bar relies on its own strength to keep the center line as a straight line; connecting plates are provided between the insulating support plates of the plurality of resistor rows, thereby arranging the plurality of resistor rows in a fixed manner at intervals; the plurality of resistor bars in each resistor row and the resistor bars in the plurality of resistor rows are electrically connected to each other.

2. A high power density rack-mounted load according to claim 1, characterized in that: The locking assembly includes a screw and a nut. Each resistor row is provided with multiple limit tubes. The two ends of each limit tube are against the side walls of two adjacent insulating support plates. The screw passes through the connecting plate, the limit tube and multiple insulating support plates and then tightens the nut to lock the multiple insulating support plates.

3. A high power density rack-mounted load according to claim 2, characterized in that: The limiting tube is a ceramic tube; or the limiting tube is a telescopic rod with adjustable length.

4. The high power density rack-mounted load according to claim 1, characterized in that: The box body is provided with a partition plate, which divides the interior of the box body into a first accommodating chamber and a second accommodating chamber. The resistance unit is fixedly installed in the first accommodating chamber. The second accommodating chamber is provided with a fan for blowing air to the first accommodating chamber, and the fan is fixed to the partition plate.

5. The high power density rack-mounted load according to claim 4, characterized in that: The side wall of the box body is provided with mesh heat dissipation holes.

6. The high power density rack-mounted load according to claim 1, characterized in that: The insulating support plate is a mica plate.

7. The high power density rack-mounted load according to claim 1, characterized in that: A U-shaped handle is provided on the outer side of the box body.

8. The high power density rack-mounted load according to claim 1, characterized in that: The resistance strip is interference-fitted with the supporting hole of the insulating supporting plate.

9. The high power density rack-mounted load according to claim 1, characterized in that: The inner wall of the supporting hole of the insulating supporting plate is provided with a thread groove, and the thread groove is matched with the thread of the resistor bar.

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