Liquid-cooled power resistor

Abstract

The utility model relates to a liquid cooling power resistor, which comprises a shell, a tubular power resistor, a flange plate, a flange sealing cover, a connecting sheet and cooling liquid, the tubular power resistor is arranged in the shell, two ends of the tubular power resistor are led out and fixed on the flange plate, the flange plate is connected on the flange sealing cover, and the flange sealing cover is connected with the shell. The connecting piece is installed on the flange sealing cover and connected with the power resistor, and the shell is filled with the cooling liquid. Compared with the prior art, the tubular power resistor is arranged in the shell filled with the cooling liquid and is sealed through the flange plate and the sealing flange cover, so that the sealing performance is good, and the size is small; the U-shaped tubular power resistors which are arranged in a crossed manner are adopted, and a liquid outlet pipeline and a liquid outlet in the sealing flange cover are integrally designed, so that the space of an inner cavity is effectively utilized, the heat exchange efficiency is high, and the structure is compact; the shell is of a Teflon or aluminum casting integrated structure, and has the advantages of high and low temperature environment resistance, cooling medium resistance, excellent pressure bearing performance and the like.

Description

Technical Field

[0001] The utility model relates to a resistor, in particular to a liquid-cooled power resistor. Background Art

[0002] When the electric drive generates a certain amount of power when quickly switching operating modes and reverse operation, as well as consumes additional power during braking, in order to prevent interference and damage to electrical components or reduce the impact on related parts, power resistors are needed to absorb energy and quickly carry it away through the flowing coolant to protect the electrical components.

[0003] At the same time, power resistors can also be connected to the thermal circulation system of electrical equipment and used as heating components of the thermal circulation system. Existing power resistors are relatively large in size. As the development direction of electrical systems towards compactness and intelligence becomes increasingly clear, there are more and more requirements for power resistors to be able to use their liquid cooling systems to significantly reduce installation space and have more diverse functions.

[0004] Therefore, how to design a liquid-cooled power resistor with a smaller volume and more diverse functions is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a liquid-cooled power resistor in order to overcome the defects of the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a liquid-cooled power resistor is provided, comprising a shell, at least one tubular power resistor, a flange, a flange sealing cover and a connecting piece, wherein the tubular power resistor is installed in the shell, and both ends are led out and fixed on the flange, the flange is connected to the flange sealing cover, the flange sealing cover is connected to the shell, the connecting piece is installed on the flange sealing cover and connected to the tubular power resistor, and the shell is filled with cooling liquid.

[0008] As a preferred technical solution, a sealing ring is installed between the flange plate and the flange sealing cover.

[0009] As a preferred technical solution, the tubular power resistor is a U-shaped tubular power resistor, and a plurality of U-shaped tubular power resistors are cross-arranged.

[0010] As a preferred technical solution, the resistor further includes a temperature controller, the flange sealing cover and the housing are provided with mounting holes, and the temperature controller passes through the mounting holes into the housing.

[0011] As a preferred technical solution, a liquid inlet is provided at one end of the shell away from the flange sealing cover, a liquid outlet pipeline is provided inside the flange sealing cover, and a liquid outlet is provided on the surface; the liquid inlet is located below the liquid outlet.

[0012] As a preferred technical solution, the shell is matched with a clamp-type bracket or a plane bracket.

[0013] As a preferred technical solution, the housing is a housing made of Teflon injection molding or cast aluminum; the flange sealing cover is a flange sealing cover made of Teflon injection molding or cast aluminum.

[0014] As a preferred technical solution, the shell is provided with an external thread, the flange sealing cover is provided with an internal thread, and the external thread and the internal thread match each other.

[0015] As a preferred technical solution, the connecting piece is installed on the flange sealing cover through studs and nuts, and the flange plate is connected to the flange sealing cover through bolts.

[0016] As a preferred technical solution, a pressure monitor is installed on the housing.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The tubular power resistor of the utility model is installed in a housing filled with coolant and sealed by a flange and a sealing flange cover, with good sealing performance and small size;

[0019] 2) The utility model effectively utilizes the inner cavity space by using cross-arranged U-shaped tubular power resistors, has high heat exchange efficiency and compact structure;

[0020] 3) The utility model has an integrated design of the liquid outlet pipe and the liquid outlet in the sealing flange cover, which is compact and further reduces the volume; the shell is a Teflon or aluminum casting integrated structure, which is resistant to high and low temperature environments, cooling media and has excellent pressure bearing performance;

[0021] 4) The utility model adopts a temperature controller and a pressure monitor to monitor the temperature or pressure of the coolant in the shell to ensure the normal operation of the resistor;

[0022] 5) The utility model can realize flexible installation functions such as vertical, horizontal or inclined installation by configuring different brackets. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded diagram of a liquid-cooled power resistor of the utility model;

[0024] Figure 2 This is a schematic diagram of the vertical installation of the utility model;

[0025] Figure 3 This is a horizontal installation diagram of the utility model;

[0026] The numbers in the figure show:

[0027] 1. Shell, 10. Liquid inlet, 2. Tubular power resistor, 3. Flange, 4. Flange sealing cover, 40. Liquid outlet, 41. Mounting hole, 5. Connecting piece, 6. Sealing ring, 7. Temperature controller, 8. Hoop bracket, 9. Stud, 11. Nut, 12. Bolt, 13. Pressure monitor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] like Figure 1 As shown, the utility model provides a liquid-cooled power resistor, including a housing 1, a tubular power resistor 2, a flange 3, a flange sealing cover 4, a connecting piece 5, a sealing ring 6, a coolant, a thermostat 7 and a pressure monitor 13. The resistor is also provided with high temperature and high pressure labels and product labels. The utility model adopts one end for liquid inlet (special cooling liquid) and the other end for liquid outlet (special cooling liquid) to achieve the maximum exchange of heat generated by the power resistor with the liquid, and at the same time achieve the purpose of monitoring through the thermostat 7, which is both efficient and safe. The utility model has a reasonable structure, high sealing performance and high resistance to environmental vibration.

[0030] The housing 1 is made of Teflon injection molding or cast aluminum, and has the characteristics of high and low temperature resistance, cooling medium resistance and excellent pressure bearing performance. The housing 1 is provided with a liquid inlet 10, and the liquid inlet 10 is provided with a mounting hole 41, and the thermostat 7 passes through the mounting hole 41 to the housing 1.

[0031] The tubular power resistor 2 is a resistor made of stainless steel, and both ends are fixed to the flange 3 by welding or cable glands. After the flange 3 is subsequently installed, the tubular power resistor 2 is located in the housing 1. The tubular power resistor 2 is U-shaped, and multiple U-shaped tubular power resistors 2 are arranged crosswise, and the resistor tube configuration can be selected according to the power.

[0032] The flange 3 is connected to the flange sealing cover 4 by bolts 12, and a sealing ring 6 is added in the middle for sealing.

[0033] The flange sealing cover 4 is a flange sealing cover 4 made of Teflon injection molding or cast aluminum, which is provided with an internal thread, and the housing 1 is provided with an external thread, and the external thread and the internal thread match each other. The assembled flange sealing cover 4 is screwed on the housing 1. It is fixed by screwing on, which is simple to install and has a good sealing effect. The tubular power resistor 2 is fixed on the flange 3 and then sealed with the flange sealing cover 4 through the sealing ring 6. The sealing structure is ingenious and has a good sealing and pressure resistance effect. The flange sealing cover 4 is provided with a liquid outlet pipeline inside, a liquid outlet 40 is provided on the surface, and a mounting hole 41 is provided around the liquid outlet 40. The thermostat 7 passes through the mounting hole 41 to the housing 1. The liquid inlet 10 is located below the liquid outlet 40, which is conducive to improving the heat dissipation efficiency. The flange sealing cover 4 has a unique structure, and the design is compatible with the liquid outlet pipeline, and there is a mounting hole 41 for installing the thermostat 7, which is a multifunctional combination.

[0034] The connecting piece 5 is mounted on the flange sealing cover 4 through the studs 9 and nuts 11 and connected to the tubular power resistor 2 .

[0035] The sealing ring 6 is a high-density silicone ring or a fluorine rubber ring, which is installed between the flange plate 3 and the flange sealing cover 4 to achieve a sealing function.

[0036] The coolant fills the housing 1 , enters from the liquid inlet 10 , and flows out from the liquid outlet 40 .

[0037] The temperature controller 7 is mounted on the resistor through the mounting hole 41 to detect the coolant temperature at the liquid inlet 10 and the liquid outlet 40 .

[0038] The pressure monitor 13 is installed on the housing 1 to detect the pressure.

[0039] The utility model can be installed vertically, horizontally or obliquely, and can be freely installed in space only through a clamp-type bracket 8 or a plane bracket; the space requirement is small and the installation is simple.

[0040] As a preferred technical solution, a pressure monitor 13 is installed on the housing 1 .

[0041] The utility model is further introduced through the installation method below:

[0042] 1. Vertical installation:

[0043] like Figure 2As shown, first fix the tubular power resistor 2 (select the resistor configuration according to the power) on the flange 3 by laser welding or other sealing welding processes, then assemble the above-mentioned assembly and the sealing ring 6 on the flange sealing cover 4 by fixing bolts 12, and connect the tubular power resistor 2 to the connecting piece 5 fixed on the flange sealing cover 4 by studs 9 and nuts 11; then complete the assembly with the housing 1. Finally, install it vertically in the space position through the mounting bracket. In the above assembly process, we can also add and install multiple thermostats 7 or pressure monitors 13 to automatically monitor the liquid temperature in the housing 1 to ensure the normal operation of the resistor (for example: 1. Add a thermostat 7 at each inlet and outlet position; 2. Add a pressure monitor 13 on the outer shell 1).

[0044] 2. Horizontal installation:

[0045] like Figure 3 As shown, the assembly of the liquid-cooled power resistor is completed as shown in the vertical installation method, and then horizontally installed through the mounting bracket (during the installation, the liquid inlet 10 is placed as low as possible below the shell body 1).

[0046] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A liquid-cooled power resistor, characterized in that: The invention comprises a housing (1), at least one tubular power resistor (2), a flange (3), a flange sealing cover (4) and a connecting piece (5); the tubular power resistor (2) is installed in the housing (1), and its two ends are led out and fixed on the flange (3); the flange (3) is connected to the flange sealing cover (4); the flange sealing cover (4) is connected to the housing (1); the connecting piece (5) is installed on the flange sealing cover (4) and connected to the tubular power resistor (2); and the housing (1) is filled with cooling liquid.

2. A liquid-cooled power resistor according to claim 1, characterized in that: A sealing ring (6) is installed between the flange plate (3) and the flange sealing cover (4).

3. The liquid-cooled power resistor according to claim 1, characterized in that: The tubular power resistor (2) is a U-shaped tubular power resistor (2), and a plurality of U-shaped tubular power resistors (2) are cross-arranged.

4. The liquid-cooled power resistor according to claim 1, characterized in that: The resistor also includes a temperature controller (7). The flange sealing cover (4) and the housing (1) are provided with a mounting hole (41), and the temperature controller (7) passes through the mounting hole (41) into the housing (1).

5. The liquid-cooled power resistor according to claim 1, characterized in that: A liquid inlet (10) is provided at one end of the shell (1) away from the flange sealing cover (4); a liquid outlet pipeline is provided inside the flange sealing cover (4) and a liquid outlet (40) is provided on the surface; the liquid inlet (10) is located below the liquid outlet (40).

6. The liquid-cooled power resistor according to claim 1, characterized in that: The shell (1) cooperates with a clamp-type bracket (8) or a plane bracket.

7. The liquid-cooled power resistor according to claim 1, characterized in that: The housing (1) is a housing (1) made of Teflon injection molding or cast aluminum; the flange sealing cover (4) is a flange sealing cover (4) made of Teflon injection molding or cast aluminum.

8. The liquid-cooled power resistor according to claim 1, characterized in that: The shell (1) is provided with an external thread, and the flange sealing cover (4) is provided with an internal thread, and the external thread and the internal thread match each other.

9. The liquid-cooled power resistor according to claim 1, characterized in that: The connecting piece (5) is installed on the flange sealing cover (4) through studs (9) and nuts (11), and the flange plate (3) is connected to the flange sealing cover (4) through bolts (12).

10. The liquid-cooled power resistor according to claim 1, characterized in that: A pressure monitor (13) is installed on the housing (1).

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