Aluminum shell resistor

Abstract

The utility model discloses an aluminum shell resistor, which belongs to the related field of resistor processing technology, and comprises an aluminum shell and a porcelain base body, the porcelain base body is fixedly arranged at the middle position of the inner side of the aluminum shell, screw rods are fixedly arranged at the middle positions of the outer surfaces of the two ends of the porcelain base body, and connecting sheets are arranged between the aluminum shell and the screw rods. The screw rod is installed in the middle of the connecting piece in a penetrating mode, and quartz sand is filled between the aluminum shell and the porcelain base body. Cylindrical mica blocks are installed on the inner sides of the two ends of the porcelain base body, one end of the screw penetrates through the middle positions of the cylindrical mica blocks, and a mica plug is installed on the inner side of the aluminum shell. A traditional wire body connecting structure is replaced, so that the resistor core is in a stable and centered state, the insulation performance of the resistor core is improved, the phenomenon that the lead is damaged in the production and transfer process is avoided, the problem that the withstand voltage is reduced due to the fact that the resistor core moves in the production process is solved, and the withstand voltage performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the related field of resistance processing technology, and specifically relates to an aluminum shell resistor. BACKGROUND

[0002] With the development of economy and the progress of society, the requirements of various industrial production fields on resistors are higher and higher, and the product is a resistor applied to large mechanical equipment, load testing, power supply, frequency converter, servo motor and harsh industrial control environment with high requirements. The main features are large power, firm installation, vibration resistance, good heat dissipation and beautiful appearance, and the product is an ideal matching product of power electronics.

[0003] The patent document with the publication number CN112750583B discloses an aluminum shell resistor, which comprises an aluminum shell, the aluminum shell is a hollow square tube, a mica framework is arranged in the center of the aluminum shell; alloy wires are wound outside the mica framework, welding caps are arranged at both ends of the mica framework, lead-out sheets are arranged outside the two welding caps, end covers are arranged at both ends of the aluminum shell, and the lead-out sheets extend outside the end covers; the alloy wires, the welding caps and the lead-out sheets are mutually welded and fixed. When not in use, the lead-out sheets at both ends can be covered, thereby protecting and dustproofing the lead-out sheets, and when in use, the lead-out sheets can be exposed through the second rotating shaft, thereby not affecting use, and meanwhile, through cooperation of the first gear, the lead-out sheet tooth surface and the first tooth plate, the lead-out length of the lead-out sheets can be adaptively adjusted, use is satisfied, the lead-out sheets are not exposed for a long time, and the influence of external impact on the lead-out sheets is avoided.

[0004] Generally, the resistor product of this type is composed of a resistance core and a lead-out wire, the resistance core is directly placed in the aluminum shell and filled with heat-resistant filler, the internal resistance core is not easy to be centered, the insulation performance of the product is reduced, the product is led out by a high-temperature lead wire, the lead wire is easy to be damaged in the production and transfer process, product performance is also easy to be reduced and scrapped, and the shock resistance and stability of the resistor are reduced. UTILITY MODEL CONTENTS

[0005] The problem solved by the utility model is:

[0006] 1. Generally, the resistor product of this type is composed of a resistance core and a lead-out wire, the resistance core is directly placed in the aluminum shell and filled with heat-resistant filler, the internal resistance core is not easy to be centered, the insulation performance of the product is reduced, the product is led out by a high-temperature lead wire, the lead wire is easy to be damaged in the production and transfer process, product performance is also easy to be reduced and scrapped, and the shock resistance and stability of the resistor are reduced.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] An aluminum shell resistor comprises an aluminum shell and a porcelain base body, the porcelain base body is fixedly installed at the middle position of the inner side of the aluminum shell, screw rods are fixedly installed at the middle positions of the outer surfaces of the two ends of the porcelain base body, connecting plates are installed between the aluminum shell and the screw rods, the screw rods are installed through the middle positions of the connecting plates, and quartz sand is filled between the aluminum shell and the porcelain base body.

[0009] As further technology of the utility model, cylindrical mica blocks are installed at the inner sides of the two ends of the porcelain base body, one end of the screw rod penetrates through the middle position of the cylindrical mica block, and a mica plug is installed at the inner side of the aluminum shell.

[0010] As further technology of the utility model, the inner surface of the aluminum shell is covered with a mica inner wall, the mica inner wall is located between the aluminum shell and the alloy wire, the mica has high temperature resistance, and the mica inner wall can withstand the heat generated during the operation of the resistor, thereby avoiding insulation failure or resistance value drift caused by local overheating.

[0011] As further technology of the utility model, the connecting plates and the screw rods and the cylindrical mica blocks and the screw rods are all fixed by nuts, the nuts can fix the installation of the screw rods, the original aluminum shell resistor uses high-temperature wires as the lead-out structure, the wires are prone to breakage, which causes the electrical performance to decrease, the special-structure aluminum shell resistor uses screw rods as the lead-out structure, the two ends are changed into paste packaging, the paste is used as the packing material, the product reliability is increased, the screw rods will not break or be damaged compared with the traditional high-temperature wires, and the porcelain base body is fixed at the middle position of the aluminum shell through the cylindrical mica blocks and the screw rods and the mica inner positioning mode, quartz sand is filled, the resistor core and the aluminum shell are supported and fixed, the resistor core is fixed at the inner position of the aluminum shell, the problem that the voltage resistance decreases due to the movement of the porcelain base body during production is avoided, and the voltage resistance performance is improved.

[0012] As further technology of the utility model, one end of the cylindrical mica block and one end of the connecting plate are both provided with elastic washers used in cooperation with the nuts, the elastic washers are installed, the fixing of the nuts is more firm, and the nuts will not fall off.

[0013] As further technology of the utility model, the outer surface of the porcelain base body is wound with an alloy wire, and the quartz sand contacts the outer surface of the alloy wire.

[0014] As further technology of the utility model, the upper part of the connecting plate and the porcelain base body are fixed by butt joints through welding plates, and the welding plates are installed, thereby limiting and fixing the upper part of the porcelain base body.

[0015] As a further technology of the utility model, the two ends of the aluminum shell are filled with sealing material, which seals and fixes the two ends of the aluminum shell.

[0016] As a further technology of the utility model, the whole of the porcelain base body is in a columnar structure, and the two ends of the porcelain base body are provided with notches for cooperating with cylindrical mica blocks.

[0017] As a further technology of the utility model, the connecting sheet and the aluminum shell are fixed through a clamping groove, and the connecting sheet and the welding sheet are fixed through welding.

[0018] The utility model discloses a special structure aluminum shell resistor, which is characterized by the following technical scheme: a cylindrical mica block is arranged in the middle of an aluminum shell body, and a porcelain base body is arranged in the middle of the cylindrical mica block; the two ends of the porcelain base body are provided with a plurality of welding sheets; a connecting sheet is arranged between the two ends of the porcelain base body; the connecting sheet is provided with a plurality of screw rods; the two ends of the aluminum shell body are filled with sealing material; the aluminum shell body is filled with quartz sand.

[0019] The utility model discloses a special structure aluminum shell resistor, which is characterized by the following technical scheme: a cylindrical mica block is arranged in the middle of an aluminum shell body, and a porcelain base body is arranged in the middle of the cylindrical mica block; the two ends of the porcelain base body are provided with a plurality of welding sheets; a connecting sheet is arranged between the two ends of the porcelain base body; the connecting sheet is provided with a plurality of screw rods; the two ends of the aluminum shell body are filled with sealing material; the aluminum shell body is filled with quartz sand. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to facilitate those skilled in the art to understand, the utility model will be further described below in combination with the drawings.

[0021] Fig. 1 It is the structure schematic diagram of the utility model.

[0022] Fig. 2 is the internal structure diagram in the utility model;

[0023] Fig. 3 is the local structure diagram in the utility model.

[0024] In the drawing, 1 is an aluminum shell, 2 is a sealing material, 3 is a screw rod, 4 is a nut, 5 is a mica inner wall, 6 is an alloy wire, 7 is a mica plug, 8 is quartz sand, 9 is a porcelain base body, 10 is a welding piece, 11 is a connecting piece, 12 is an elastic gasket, and 13 is a cylindrical mica block. DETAILED DESCRIPTION

[0025] The technical solutions of the utility model will be described clearly and completely below in combination with embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] As shown in the drawing, Figs. 1-3 An aluminum shell resistor includes an aluminum shell 1 and a porcelain base body 9. The porcelain base body 9 is fixedly installed at the inner middle position of the aluminum shell 1. Screw rods 3 are fixedly installed at the middle positions of the outer surfaces of the two ends of the porcelain base body 9. Connecting pieces 11 are installed between the aluminum shell 1 and the screw rods 3. The screw rods 3 are installed through the middle positions of the connecting pieces 11. The aluminum shell 1 and the porcelain base body 9 are filled with quartz sand 8.

[0027] The inner sides of the two ends of the porcelain base body 9 are each installed with a cylindrical mica block 13. One end of the screw rod 3 penetrates through the middle position of the cylindrical mica block 13. A mica plug 7 is installed at the inner side of the aluminum shell 1. Mica is an excellent high-insulation material in this embodiment. The cylindrical mica block 13 can effectively prevent the current leakage of a resistance core to the shell or external circuit, ensuring the normal operation and safety of the resistance. The resistance core is in the porcelain base body 9.

[0028] The inner surface of the aluminum shell 1 is covered with a mica inner wall 5. The mica inner wall 5 is located between the aluminum shell 1 and the alloy wire 6. Mica has high temperature resistance. The mica inner wall 5 can withstand the heat generated during the operation of the resistance, avoiding insulation failure or resistance value drift caused by local overheating.

[0029] To improve the use effect of the aluminum shell resistor, as shown in the drawing, Fig. 2As shown, the connecting piece 11 and the screw rod 3 and the cylindrical mica block 13 and the screw rod 3 are all fixed by the nut 4, and the use of the nut 4 can fix the installation of the screw rod 3. The original aluminum shell resistor uses high temperature wire as the lead-out structure, and the wire is easy to break, which causes the electrical performance to decrease. The special structure aluminum shell resistor uses the screw rod 3 as the lead-out structure, and the two ends are changed to paste packaging. The sealing material 2 is paste, which increases the product reliability. The screw rod 3 will not break and be damaged compared with the traditional high temperature wire. Secondly, through the positioning mode of the cylindrical mica block 13 and the screw rod 3 and the mica inside, the porcelain base 9 is fixed in the middle position of the aluminum shell 1, and the quartz sand 8 is filled, which supports and fixes the resistance core and the aluminum shell 1, fixes the resistance core in the internal position of the aluminum shell 1, prevents the problem of reduced voltage resistance caused by the movement of the porcelain base 9 in the production process, and improves the voltage resistance performance.

[0030] One end of the cylindrical mica block 13 and one end of the connecting piece 11 are provided with elastic washers 12 used in cooperation with the nut 4. The use of the elastic washers 12 makes the fixing of the nut 4 more firm and avoids the falling phenomenon.

[0031] The outer surface of the porcelain base 9 is wound with alloy wire 6, and the quartz sand 8 is in contact with the outer surface of the alloy wire 6.

[0032] The upper part of the connecting piece 11 and the porcelain base 9 are fixed by the welding piece 10, and the use of the welding piece 10 limits and fixes the upper part of the porcelain base 9.

[0033] The both ends of the aluminum shell 1 are filled with sealing material 2, which seals and fixes the both ends of the aluminum shell 1.

[0034] The whole of the porcelain base 9 is in a columnar structure, and both ends of the porcelain base 9 are provided with notches used in cooperation with the cylindrical mica block 13.

[0035] The connecting piece 11 and the aluminum shell 1 are fixed by the clamping groove, and the connecting piece 11 and the welding piece 10 are fixed by welding.

[0036] The aluminium shell resistor, by setting screw rod 3 and quartz sand 8, in the special structure aluminium shell resistor use, replace traditional line body connection structure, make the resistance core is in stable central state, improve its insulation performance, avoid lead breakage phenomenon in production transfer process, the original aluminium shell resistor mostly uses high temperature wire as lead-out structure, wire is easy to break, cause electrical performance decline, and special structure aluminium shell resistor uses screw rod 3 as lead-out structure, two ends are changed into paste packaging, and the sealing material 2 is paste, increase the product reliability, compared with traditional high temperature wire, the screw rod 3 will not appear fracture and breakage phenomenon, secondly, through the positioning mode of cylindrical mica block 13, screw rod 3 and mica inside, make the porcelain base 9 fixed in the middle position of the aluminium shell body 1, make the resistance core fixed in the internal position of the aluminium shell body 1, prevent the voltage resistance caused by resistance core position movement in production process, improve the voltage resistance performance;

[0037] Through the setting of the connecting sheet 11 and the quartz sand 8, when the aluminium shell resistor is assembled, the installation precision between the aluminium shell body 1 and the porcelain base 9 is improved, so that the porcelain base 9 is accurately installed in the middle position of the aluminium shell body 1, and the filling effect of the quartz sand 8 is improved, the connecting sheet 11 is used to assist in fixing the screw rod 3 at both ends of the porcelain base 9, so that the porcelain base 9 is located in the middle position of the aluminium shell body 1, the quartz sand 8 is filled, the resistance core and the aluminium shell body 1 are supported and fixed, so that the resistance core is fixed in the internal position of the aluminium shell body 1, the problem of voltage resistance caused by the movement of the resistance core in the production process is prevented, the voltage resistance performance is improved, the filling of the quartz sand 8 can compensate for the gap between the resistance core and the aluminium shell body 1, the main function of the sand filling in the aluminium shell resistor is to improve the heat dissipation performance and enhance the mechanical stability, the sand filling can prevent the resistance core from loosening in transportation or vibration, such as the metal wire or the ceramic base of the wire-wound resistor, to avoid poor contact or short circuit caused by displacement, the friction between the particles of the sand can absorb external vibration energy and reduce the damage of mechanical stress to the internal structure of the resistor.

[0038] The above content is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the present application or exceed the scope defined in the present application 。

Claims

1. An aluminum case resistor characterized by, The utility model provides a kind of ceramic base (9) and aluminium shell (1) including, ceramic base (9) is fixedly installed in the middle position of the inside of aluminium shell (1), screw rod (3) is fixedly installed in the middle position of both ends outer surface of ceramic base (9), connecting sheet (11) is installed between aluminium shell (1) and screw rod (3), screw rod (3) is installed in the middle position of connecting sheet (11) and is filled with quartz sand (8) between aluminium shell (1) and ceramic base (9).

2. An aluminum case resistor according to claim 1, wherein The inside of both ends of the ceramic base (9) is installed with cylindrical mica block (13), one end of the screw rod (3) penetrates the middle position of the cylindrical mica block (13), and the inside of the aluminium shell (1) is installed with mica plug (7).

3. An aluminum case resistor according to claim 1, wherein The inner surface of the aluminium shell (1) is covered with mica inner wall (5), which is located between the aluminium shell (1) and the alloy wire (6).

4. An aluminum case resistor according to claim 2, wherein The connecting sheet (11) and the screw rod (3) and the cylindrical mica block (13) and the screw rod (3) are all fixed by nut (4).

5. An aluminum case resistor according to claim 4, wherein One end of the cylindrical mica block (13) and one end of the connecting sheet (11) are provided with elastic gasket (12) for cooperating with nut (4).

6. An aluminum case resistor according to claim 1, wherein The outer surface of the ceramic base (9) is wound with alloy wire (6), and the quartz sand (8) is in contact with the outer surface of the alloy wire (6).

7. An aluminum case resistor according to claim 6, wherein The upper part of the connecting sheet (11) and the ceramic base (9) are fixed by welding sheet (10).

8. An aluminum case resistor according to claim 1, wherein Both ends of the aluminium shell (1) are filled with sealing material (2).

9. An aluminum case resistor according to claim 1, wherein The ceramic base (9) is in columnar structure, and both ends of the ceramic base (9) are provided with notches for cooperating with the cylindrical mica block (13).

10. An aluminum case resistor according to claim 1, wherein The connecting sheet (11) and the aluminium shell (1) are fixed by clamping groove, and the connecting sheet (11) and the welding sheet (10) are fixed by welding.

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