High-voltage contactor and preparation method thereof

Abstract

The high-voltage contactor comprises a ceramic seat part, a magnetizer part, a transmission part A, a transmission part B and a moving contact part, the ceramic seat part is arranged on the magnetizer part, the transmission part A penetrates through the magnetizer part and is connected with the magnetizer part, the transmission part B is arranged on the transmission part A, and the moving contact part is arranged on the transmission part B; and the transmission part A is connected with the moving contact part. The arrangement of the iron core penetrating through the magnetizer and the inverted dust cover effectively prevents redundant substances formed by ablation after a contact switches a large load in the use process of the contactor from entering a transmission part, and the part of the iron core penetrating through the magnetizer can effectively protect the transmission part. And the condition of clamping stagnation caused by the fact that redundant materials in the cavity enter the transmission part is further avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of contactors, and in particular relates to a high-voltage contactor and a preparation method thereof. Background Art

[0002] With the development of science and technology, aerospace devices have developed towards multi-function and multi-purpose. The more functions they have, the more equipment and components they use, all of which increase the demand for aviation power. High-voltage direct current is more efficient in completing these larger power supplies, so aerospace contactors are developing towards high voltage. However, when the contacts are closed and disconnected, due to the high voltage, large current, strong arc burnout, and severe contact erosion, there are many residues left by contact erosion and splashes during the disconnection process, and these residues can easily fall into the gaps of movable parts, causing the product to become stuck and unable to move, and ultimately leading to the failure of the product to fail to move or to fail to disconnect after movement.

[0003] Most traditional high-voltage contactors do not take any dust prevention measures. Therefore, after a period of time during the switching of large loads, the corresponding products often become stuck due to excess material formed after contact erosion, resulting in early failure of the product, such as failure to operate when powered on or failure to disconnect the contacts when the coil is powered off.

[0004] The patent document with the announcement number CN113963991A discloses a ceramic and epoxy double sealed high voltage DC contactor, including an outer iron core, on which a sealing component, a moving component, a moving contact and a static contact are arranged, the moving component is used to drive the moving contact to move, the sealing component includes a ceramic inner support cover and an epoxy resin poured on the ceramic inner support cover, the ceramic inner support cover is welded with a contact valve ring and a large valve ring by ceramic brazing technology, and the static contact is welded in the contact valve ring. There is no protective structure at the second compression spring of the contactor, and the splash generated during the closing and breaking process of the contact can easily enter the sliding connection of the push rod, causing jamming.

[0005] The patent document with announcement number CN202167408U discloses a high-voltage contactor, which includes a housing, an arc-extinguishing hood, and a moving contact piece, a static contact piece, a moving iron core and a static iron core arranged in the housing. A magnetic steel is arranged in the arc-extinguishing hood, and a vacuum tube is connected from the arc-extinguishing hood to the outside of the arc-extinguishing hood and to the vacuum device outside. The magnetic steel arranged in the high-voltage contactor plays an arc-extinguishing role; and the vacuum device arranged can remove the gas adsorbed on the surface of the parts, decompose and evaporate to eliminate moisture and solvent residues in the pores, and remove organic gases in organic materials. However, there is no dustproof structure in its accommodation space, and the splashes generated during the closing and disconnection of the contacts can easily enter the sliding connection of the push rod, causing jamming. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a high voltage contactor and a preparation method thereof.

[0007] The present invention is achieved through the following technical solutions.

[0008] A high-voltage contactor provided by the present invention comprises a ceramic seat part, a magnetic conductor part, a transmission part A, a transmission part B and a moving contact part, wherein the ceramic seat part is arranged on the magnetic conductor part, the transmission part A penetrates through the magnetic conductor part and is connected, the transmission part B is arranged on the transmission part A, and the transmission part A is connected to the moving contact part.

[0009] Preferably, the ceramic seat part includes a static contact, a ceramic seat and a sealing ring, the static contact is arranged on the top of the ceramic seat, the static contact penetrates the ceramic seat and is connected, the bottom of the ceramic seat is connected to the sealing ring, and the sealing ring is connected to the magnetic conductor part.

[0010] Preferably, the magnetic conductor part includes an iron core and a magnetic conductor, the iron core is connected through the magnetic conductor, a through hole A, a groove A and a groove B are arranged on the iron core, the through hole A is arranged through the iron core, the groove A is arranged at one end of the through hole A, and the groove B is arranged at the other end of the through hole A.

[0011] Preferably, a slide groove A is arranged on one side of the core close to the groove B, and the axial section of the slide groove A is trapezoidal.

[0012] Preferably, the transmission part A includes a transmission rod, a main compression spring, an armature and a sleeve, the transmission rod passes through the main compression spring and the armature, one end of the main compression spring is connected to the magnetic conductor part, and the other end of the main compression spring is connected to the armature, and the armature is arranged in the sleeve.

[0013] Preferably, a limit block is provided on the transmission rod, a groove C, a boss and a through hole B are provided on the armature, the boss is in a conical table shape, and the transmission rod passes through the armature through the through hole B.

[0014] Preferably, the transmission part B comprises an overtravel compression spring and a retaining ring, and the overtravel compression spring and the retaining ring are respectively connected to the transmission part.

[0015] Preferably, the moving contact part includes a moving contact and a dust cover, and the moving contact is connected to the transmission part A and the magnetic conductor part through the dust cover.

[0016] Preferably, a placement ring is provided on the dust cover, and the moving contact is placed in the placement ring, and the moving contact is located below the ceramic seat part.

[0017] A method for preparing a high voltage contactor comprises the following steps:

[0018] S1: Weld the static contact, ceramic seat and sealing ring to form the ceramic seat part, and weld the iron core to the magnetic conductor.

[0019] S2: After the transmission rod passes through the iron core, it is connected to the main compression spring. Then, the armature is connected to the transmission rod from the side of the transmission rod close to the main compression spring. After the transmission rod passes through the armature, the armature is covered with a sleeve, and the sleeve is welded to the magnet.

[0020] S3: Press the moving contact and the dust cover together, and after the transmission rod passes through the transmission part B, install the overtravel compression spring into the groove A, and make the transmission rod pass through the overtravel compression spring, and install the retaining ring on the top of the dust cover. At this time, the transmission rod passes through the retaining ring.

[0021] S4: Weld the ceramic seat part to the magnetic conductor, seal the transmission part B and complete the preparation.

[0022] The beneficial effects of the present invention are:

[0023] The iron core of the present invention is arranged to pass through the magnetic conductor, which is different from the design in which the iron core and the magnetic conductor are flush with each other in general traditional contactors. It can effectively prevent the excess material formed by the ablation after the contacts switch a large load during use of the contactor from entering the transmission part, such as: in the transmission rod, the iron core passing through the magnetic conductor part can effectively protect the transmission part, and further prevent the excess material in the cavity from entering the transmission part and causing jamming.

[0024] The dust cover of the present invention is an inverted setting, which is designed as an integral part with the moving contact and effectively intersects with the iron core. Since the intersection length is greater than the armature stroke, even if the transmission part operates normally, the iron core and the dust cover can be perfectly connected, and a local movable dustproof cavity is formed, which effectively prevents the contactor from burning into the transmission part due to splashes and other excess materials after the contact switches a large load during use, greatly reduces the situation where the transmission part of the product is stuck due to excess materials, and further ensures the reliability of the contactor during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a main structural schematic diagram of the present invention;

[0026] Figure 2 It is a left-side structural schematic diagram of the present invention;

[0027] In the figure: 1-static contact, 2-ceramic seat, 3-sealing ring, 4-iron core, 41-through hole A, 42-groove A, 43-groove B, 44-slide A, 5-magnetic conductor, 6-transmission rod, 61-limiting block, 7-main compression spring, 8-armature, 81-groove C, 82-boss, 83-through hole B, 9-sleeve, 10-moving contact, 11-dust cover, 111-placement ring, 12-overtravel compression spring, 13-retaining ring. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0029] Example:

[0030] like Figure 1 , 2 As shown, a high-voltage contactor includes a ceramic seat part, a magnetic conductor part, a transmission part A, a transmission part B and a moving contact part, the ceramic seat part is arranged on the magnetic conductor part, the transmission part A penetrates the magnetic conductor part and is connected, the transmission part B is arranged on the transmission part A, and the transmission part A is connected to the moving contact part.

[0031] The ceramic seat part includes a static contact 1, a ceramic seat 2 and a sealing ring 3. The static contact 1 is arranged on the top of the ceramic seat 2, and the static contact 1 passes through the ceramic seat 2 and is connected. The bottom of the ceramic seat 2 is connected to the sealing ring 3, and the sealing ring 3 is connected to the magnetic conductor 5 of the magnetic conductor part.

[0032] The magnetic conductor part includes an iron core 4 and a magnetic conductor 5, the iron core 4 penetrates the magnetic conductor 5 and is connected, a through hole A41, a groove A42 and a groove B43 are arranged on the iron core 4, the through hole A41 penetrates the iron core 4, the groove A42 is arranged at one end of the through hole A41, and the groove B43 is arranged at the other end of the through hole A41. The groove A42 is located at the part where the iron core 4 penetrates the magnetic conductor 5, and has a dustproof effect.

[0033] A slide groove A44 is arranged on one side of the core 4 close to the groove B43, and the axial section of the slide groove A44 is trapezoidal.

[0034] The transmission part A includes a transmission rod 6, a main compression spring 7, an armature 8 and a sleeve 9. The transmission rod 6 passes through the main compression spring 7 and the armature 8. The transmission rod 6 passes through the iron core 4 through the through hole A41 and is slidably connected. One end of the main compression spring 7 is placed in the groove B43 and is slidably connected to the magnetic conductor part. The other end of the main compression spring 7 is placed in the groove C81 and is slidably connected to the armature 8. The armature 8 is arranged in the sleeve 9, and the open end of the sleeve 9 is connected to the magnetic conductor 5.

[0035] A limit block 61 is provided on the transmission rod 6, and the limit block 61 is placed in the groove A42 to prevent the transmission rod 6 from escaping from the iron core 4. A groove C81, a boss 82 and a through hole B83 are provided on the armature 8. The boss 82 is in a conical table shape, and the boss 82 can be extended into the slide groove A44 for sliding connection, so that the armature 8 and the iron core 4 can maintain a coaxial connection, and the transmission rod 6 passes through the armature 8 through the through hole B83.

[0036] The transmission part B includes an overtravel compression spring 12 and a retaining ring 13, and the overtravel compression spring 12 and the retaining ring 13 are respectively connected to the transmission rod 6 of the transmission part A. The transmission rod 6 passes through the overtravel compression spring 12, and the overtravel compression spring 12 is set in the groove A42 for sliding connection. The retaining ring 13 is placed on the top of the dust cover 11.

[0037] The moving contact part includes a moving contact 10 and a dust cover 11. The moving contact 10 is connected to the transmission part A and the magnetic conductor part through the dust cover 11. The transmission rod 6 passes through the dust cover 11. The top of the iron core 4 extends into the bottom of the dust cover 11 for connection. There is a gap between the dust cover 11 and the top of the iron core 4. The dust cover 11 is inverted for the iron core 4, completely covering the top opening of the iron core 4.

[0038] The dust cover 11 is provided with a storage ring 111 , and the moving contact 10 is placed in the storage ring 111 . The moving contact 10 is located below the static contact 1 of the ceramic base portion.

[0039] A method for preparing a high voltage contactor comprises the following steps:

[0040] S1: Weld the static contact 1, the ceramic seat 2 and the sealing ring 3 to form the ceramic seat part, and weld the iron core 4 to the magnetic conductor 5.

[0041] S2: After the transmission rod 6 passes through the iron core 4, it is connected to the main compression spring 7, and then the armature 8 is connected to the transmission rod 6 from the side of the transmission rod 6 close to the main compression spring 7, until the transmission rod 6 passes through the armature 8, the sleeve 9 is used to cover the armature 8, and the sleeve 9 is welded to the magnet 5.

[0042] S3: Press the moving contact 10 and the dust cover 11 into one body, and after the transmission rod 6 passes through the transmission part B, install the overtravel compression spring 12 into the groove A42, and make the transmission rod 6 pass through the overtravel compression spring 12, and install the retaining ring 13 on the top of the dust cover 11. At this time, the transmission rod 6 passes through the retaining ring 13.

[0043] S4: Weld the ceramic seat part to the magnetizer 5, and seal the transmission part B to complete the preparation.

Claims

1. A high voltage contactor, characterized in that: It includes a ceramic seat part, a magnetic conductor part, a transmission part A, a transmission part B and a moving contact part. The ceramic seat part is arranged on the magnetic conductor part, the transmission part A penetrates the magnetic conductor part and is connected, the transmission part B is arranged on the transmission part A, and the transmission part A is connected to the moving contact part.

2. A high voltage contactor according to claim 1, characterized in that: The ceramic seat part comprises a static contact (1), a ceramic seat (2) and a sealing ring (3); the static contact (1) is arranged on the top of the ceramic seat (2); the static contact (1) penetrates the ceramic seat (2) and is connected; the bottom of the ceramic seat (2) is connected to the sealing ring (3); and the sealing ring (3) is connected to the magnetic conductor part.

3. A high voltage contactor according to claim 1, characterized in that: The magnetic conductor part comprises an iron core (4) and a magnetic conductor (5); the iron core (4) penetrates the magnetic conductor (5) and is connected; a through hole A (41), a groove A (42) and a groove B (43) are arranged on the iron core (4); the through hole A (41) penetrates the iron core (4); the groove A (42) is arranged at one end of the through hole A (41); and the groove B (43) is arranged at the other end of the through hole A (41).

4. A high voltage contactor as claimed in claim 3, characterized in that: A slide groove A (44) is arranged on one side of the core (4) close to the groove B (43), and the axial section of the slide groove A (44) is arranged in a trapezoidal shape.

5. A high voltage contactor according to claim 1, characterized in that: The transmission part A comprises a transmission rod (6), a main compression spring (7), an armature (8) and a sleeve (9); the transmission rod (6) passes through the main compression spring (7) and the armature (8); one end of the main compression spring (7) is connected to the magnetic conductor part; the other end of the main compression spring (7) is connected to the armature (8); and the armature (8) is arranged in the sleeve (9).

6. A high voltage contactor as claimed in claim 5, characterized in that: The transmission rod (6) is provided with a limit block (61), the armature (8) is provided with a groove C (81), a boss (82) and a through hole B (83), the boss (82) is in a conical shape, and the transmission rod (6) passes through the armature (8) through the through hole B (83).

7. A high voltage contactor according to claim 1, characterized in that: The transmission part B comprises an overtravel compression spring (12) and a retaining ring (13), and the overtravel compression spring (12) and the retaining ring (13) are respectively connected to the transmission part.

8. A high voltage contactor according to claim 1, characterized in that: The moving contact part comprises a moving contact (10) and a dust cover (11), and the moving contact (10) is connected to the transmission part A and the magnetic conductor part via the dust cover (11).

9. A high voltage contactor as claimed in claim 8, characterized in that: A storage ring (111) is arranged on the dust cover (11), the moving contact (10) is placed in the storage ring (111), and the moving contact (10) is located below the ceramic seat portion.

10. A method for installing a high-voltage contactor according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: welding the stationary contact (1), the ceramic seat (2) and the sealing ring (3) to form a ceramic seat part, and welding the iron core (4) to the magnetic conductor (5); S2: After the transmission rod (6) passes through the iron core (4), it is connected to the main compression spring (7), and then the armature (8) is connected to the transmission rod (6) from the side of the transmission rod (6) close to the main compression spring (7), until the transmission rod (6) passes through the armature (8), the armature (8) is covered with a sleeve (9), and the sleeve (9) is welded to the magnetic conductor (5); S3: The moving contact (10) and the dust cover (11) are pressed together, and after the transmission rod (6) passes through the transmission part B, the overtravel compression spring (12) is installed in the groove A (42), and the transmission rod (6) passes through the overtravel compression spring (12), and the retaining ring (13) is installed on the top of the dust cover (11). At this time, the transmission rod (6) passes through the retaining ring (13); S4: Weld the ceramic seat part to the magnetizer (5), and seal the transmission part B to complete the preparation.

Images