CN109256300B - Bipolar direct current contactor of nonpolar ceramic seal - Google Patents
Bipolar direct current contactor of nonpolar ceramic seal Download PDFInfo
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- CN109256300B CN109256300B CN201811349707.8A CN201811349707A CN109256300B CN 109256300 B CN109256300 B CN 109256300B CN 201811349707 A CN201811349707 A CN 201811349707A CN 109256300 B CN109256300 B CN 109256300B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 75
- 230000003068 static effect Effects 0.000 claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- BSPSZRDIBCCYNN-UHFFFAOYSA-N phosphanylidynetin Chemical compound [Sn]#P BSPSZRDIBCCYNN-UHFFFAOYSA-N 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims 5
- 238000007789 sealing Methods 0.000 abstract description 8
- 239000003990 capacitor Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 230000004927 fusion Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 235000014676 Phragmites communis Nutrition 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/02—Non-polarised relays
- H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/541—Auxiliary contact devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a nonpolar ceramic sealing bipolar direct current contactor which comprises a base assembly, a ceramic arc-extinguishing chamber assembly, a contact support member assembly and a magnetic conduction plate assembly, wherein the base assembly is connected with the ceramic arc-extinguishing chamber assembly; two N poles and S poles are arranged near a main fixed contact of an extension line of a movable contact bridge in a face-to-face manner by using permanent magnets, and a magnet guiding plate is arranged on the center line between the two permanent magnet plates. The nonpolar permanent magnet arc extinguishing system forming 4 main static contacts can replace three products of an anode contactor, a cathode contactor and a precharge relay to form a precharge system for controlling capacitor loads, overcomes the defects of the prior art, has longer power-on time and more control programs, and can cause faults of fusion welding of the anode contactor, burnout of a precharge resistor and the like during false charging.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a bipolar direct current contactor sealed by nonpolar ceramics.
Background
The existing ceramic sealing technology is used for manufacturing a majority of unipolar direct current contactors, and the unipolar direct current contactors are mainly used for starting and stopping charging piles, electric automobiles, electric forklifts and storage battery vehicles and controlling power supply conversion circuits. The traditional DC contactor mainly comprises a base, a contact for controlling a switching-on and switching-off circuit and an electromagnet operating mechanism, and the structure of the traditional DC contactor is mainly an EV series new energy DC contactor or an improved DC contactor of the American TYCO company. Such as those disclosed in chinese patent nos. CN 105374632a, 200520089587.4, 20072015712.5, 200720105713.X, 200720045041.8, etc. Some permanent magnets are arranged on two sides of the contact, so that an arc is blown off the contact rapidly, and an arc extinguishing chamber with an arc extinguishing grid plate is not arranged, so that the working voltage is not high. Patent 200720045041.8 discloses that the arc extinguishing chamber has a plurality of arc extinguishing bars at each breaking point, but the working voltage can not meet the development requirement of the electric automobile. The prior direct current contactor has been used on the market in recent years and is used on electric vehicles and electric-steam hybrid vehicles and provided with a vacuum relay CN201282083Y, and the vacuum relay comprises a movable contact assembly, a static contact assembly, a pushing mechanism containing an iron core, a ceramic cavity and an outer magnetic circuit part; the pushing mechanism comprises a pushing rod and an iron core which can enable the pushing rod to move under the action of the external magnetic circuit part; the movable contact point assembly, the stationary contact point and the pushing mechanism are completely sealed in a vacuum cavity formed by the ceramic cavity and are positioned at the positions corresponding to each other, the movable contact point assembly and the iron core are respectively connected at two ends of the pushing rod, and the ceramic insulator for realizing good electrical insulation between the movable contact point assembly and the pushing rod and between the movable contact point assembly and the iron core is connected at the joint of the movable contact point assembly and the pushing rod in a sliding manner. The direct current relay CN104091726A discloses a direct current relay which comprises a contact part, wherein the contact part comprises two fixed contacts and a movable reed, the fixed contacts are respectively used for providing current inflow and outflow, and two ends of the movable reed are respectively matched with the two fixed contacts; the two ends of the movable reed are symmetrically provided with a first magnetic steel for arc blowing, and the polarities of the opposite surfaces of the two first magnetic steels are arbitrarily set; at least one second magnetic steel with a magnetic field in a preset direction is arranged on the outer side of the middle of the movable reed, so that an electromagnetic force opposite to the repulsive force direction of a contact is generated when the magnetic field in the preset direction acts on the movable reed, and a patent CN103985604B discloses an arc extinguishing mechanism, a relay frame and a relay, wherein the relay comprises a frame main body, at least one magnetic steel and at least one arc-resistant sheet; the frame body is provided with a hollow part, and contacts which can be correspondingly contacted are accommodated in the hollow part; the magnetic steel is arranged on the frame main body, is positioned at the periphery of the arc gap and can blow an arc generated at the arc gap; the arc-resistant sheet is arranged on the frame main body and is positioned in the arc blowing action direction of the magnetic steel. The battery can meet the 320V requirement of battery operation, and the pre-charging control unit is composed of two single-pole direct-current contactors, a relay and a resistor, but has some unsafe links and cannot meet the requirements of further development and performance improvement of charging piles and electric automobiles.
Disclosure of Invention
The invention aims to solve the problems, and provides a bipolar direct current contactor sealed by nonpolar ceramics, wherein a permanent magnet is used as a magnetic quenching element, and a bipolar direct current contactor with a pre-charging contact is formed by using a resistor embedded in an arc isolation member and an auxiliary contact.
The invention realizes the above purpose through the following technical scheme:
a bipolar direct current contactor sealed by nonpolar ceramics comprises a base component, a ceramic arc-extinguishing chamber component, a contact support component and a magnetic conduction plate component;
the base assembly comprises a base and a conductive plate;
the ceramic arc-extinguishing chamber assembly comprises a ceramic arc-extinguishing chamber, wherein the ceramic arc-extinguishing chamber is of a cylindrical structure provided with four cavities, the middle of the ceramic arc-extinguishing chamber is provided with an A main arc-extinguishing chamber and a B main arc-extinguishing chamber, the adjacent left side of the A main arc-extinguishing chamber is provided with a C auxiliary arc-extinguishing chamber, and the adjacent right side of the B main arc-extinguishing chamber is provided with a D auxiliary arc-extinguishing chamber; after the cylinder structure is metallized, two pairs of wire nut type main fixed contacts are respectively sealed in an A main arc-extinguishing chamber and a B main arc-extinguishing chamber, two pairs of auxiliary contact fixed contact rods are respectively sealed in a C auxiliary arc-extinguishing chamber and a D auxiliary arc-extinguishing chamber, and a first connecting piece is sealed below the ceramic arc-extinguishing chamber; two permanent magnets which are arranged in a face-to-face manner of N poles and S poles are arranged in rectangular slotted holes near the main fixed contacts of the movable contact bridge extension lines of the two pairs of main fixed contacts outside the ceramic arc extinguishing chamber, and two magnet guiding plates are arranged in the middle line thin walls of the two pairs of main fixed contacts inside the ceramic arc extinguishing chamber;
the contact support assembly is arranged in the ceramic arc extinguishing chamber and comprises a support piece, a main contact bridge plate, an auxiliary contact, a main contact spring, an auxiliary spring and an arc isolation piece; the center shaft penetrating through the support piece is arranged in the middle of the support piece and used as a guide shaft, main windows for installing the main contact bridge plates and the main contact springs are symmetrically arranged on two sides of the guide shaft, auxiliary windows for installing the auxiliary contacts and the auxiliary springs are arranged on the outer sides of the two main windows, the main contact bridge plates are of two sizes, the main contact bridge in the corresponding A main arc extinguishing chamber is a standard plate, the main contact bridge in the corresponding B main arc extinguishing chamber is a thickened main contact bridge plate, a notch for installing a check ring is arranged on the guide shaft at the lower part of the support piece, a gasket is arranged above the check ring, a counter force spring is arranged above the gasket, the counter force spring is sleeved on the guide shaft and arranged between the gasket and the arc isolating piece, and the arc isolating piece is arranged below the support piece;
the arc isolation piece is of a disc structure, and a groove-shaped structure formed by double layers of thin walls is arranged at the upper end of the disc structure and in the middle of the lower part of the A, B main arc extinguishing chamber; a hole is formed in the middle of the disc structure, and a support for placing a counter-force spring is arranged around the hole; the lower end of the arc isolation piece disc is provided with a groove for accommodating the pre-charging resistor along the circumference, and the auxiliary contact static contact rod in the C auxiliary arc-extinguishing chamber is connected with the pre-charging resistor and the auxiliary contact static contact rod in the D auxiliary arc-extinguishing chamber in series and then connected with the main static contact of the A main arc-extinguishing chamber in parallel; the lower ends of the two pairs of auxiliary contact static contact rods are respectively sleeved with a wiring lug which is used for connecting a precharge resistor;
the magnetic conduction plate assembly is arranged below the ceramic arc extinguishing chamber assembly and comprises a magnetic conduction plate, a second connecting piece, an armature, a copper pipe and an adjusting pad, wherein the second connecting piece is a cylinder with an annular round edge formed by stretching a non-magnetic conduction stainless steel sheet, and the adjusting pad and the armature are arranged in the cylinder of the connecting piece and are arranged in the middle of the magnetic conduction plate; the copper pipe is welded in the middle of the bottom of the second connecting piece; the upper part of the guide shaft is inserted into a round hole in the middle of the inside of the ceramic arc extinguishing chamber, and the lower end of the guide shaft penetrates through a middle hole of the magnetic conduction plate to be inserted into a middle hole of the armature and is contacted with the bottom of the hole;
the magnetic conduction plate assembly is sequentially sleeved with a coil and a yoke plate, and the yoke plate and the magnetic conduction plate are riveted.
By adopting the technical scheme, the base is designed to be used for protecting a contact system and installing products, and the permanent magnet magnetic blowing arc extinguishing design is disclosed, the four main static contacts are provided with two permanent magnets face to face outside the arc extinguishing chamber, the middle of the two main arc extinguishing chambers in the inner A, B of the ceramic arc extinguishing chamber is provided with the magnet guiding plates, namely, the magnet guiding plates are arranged between the N pole and the S pole, so that magnetic leakage can be reduced when the distance between the two poles is larger, the magnet guiding plates have better arc burning resistance than the permanent magnets, and the nonpolar direct current contactor has the least quantity of permanent magnets.
When the coil of the electromagnetic mechanism is electrified, the armature is attracted to push the contact support component, so that the main contact of the main arc-extinguishing chamber B and the auxiliary contact C firstly close the pre-charging resistor access circuit to realize pre-charging, and the main contact of the main arc-extinguishing chamber A closes the pre-charging resistor and the auxiliary contact bypass serving as the pre-charging switch after about a few ms to finish the electrifying process of the capacitive load. The two pairs of nut type main fixed contacts and two pairs of auxiliary contact fixed contact rods are sealed on the same ceramic arc extinguish chamber to form a ceramic sealing arc extinguish chamber assembly, the two main contact plates and the two auxiliary contacts are arranged on the same contact support member assembly, so that manufacturing errors are greatly reduced, after a precharge circuit works, a precharge resistor is ensured to bypass, a working procedure is set on a patent product to finish one-time starting, the operation is realized, the defects of the prior art can be reduced, the overlong charging time can not occur, the precharge resistor is burnt out, and the fact that an actual capacitor is not charged (the precharge is completed in a false mode) to burn out an anode contactor can not occur.
Preferably, the thickness of the thickened main contact bridge plate at the contact point is 0.8-1mm larger than the standard main contact bridge plate thickness.
Preferably, the windows for installing the auxiliary contacts and the auxiliary springs of the support piece are designed into large over-travel contacts, namely, the opening distance of the main static contact of the main arc-extinguishing chamber A is a normal value, and the opening distances of the two pairs of auxiliary contacts and the main static contact of the main arc-extinguishing chamber B are smaller than the normal value by 0.8-1mm.
Preferably, the first connecting piece sealed under the ceramic arc-extinguishing chamber assembly and the magnetic conduction plate are welded into a whole by laser, and the whole is a contact part.
Preferably, the pre-charging resistor is an electrothermal alloy resistance wire spring ring with the outer diameter not more than 4mm, the wire diameter of 0.45mm, the pitch of 0.5mm and the number of turns of 200, and the two ends of the electrothermal alloy resistance wire spring ring are firmly pressed on a tin-phosphor bronze wiring board with the thickness of 0.5 mm.
Preferably, two holes are formed in the middle of the wiring lug, the aperture is 3.1mm, the distance between the two holes is 12mm, an upper layer and a lower layer with an included angle of 10 degrees are formed by folding back the middle, the centers of the two holes are staggered by 0.2mm, and the two holes are respectively sleeved on the corresponding auxiliary contact static contact rods by utilizing the tension of the two holes.
Preferably, the ceramic arc extinguishing chamber is filled with hydrogen-nitrogen mixed gas.
Preferably, the ceramic arc-extinguishing chamber is made of high-temperature-resistant high-purity alumina, wherein thin walls are arranged between the main arc-extinguishing chamber A and the auxiliary arc-extinguishing chamber C and between the main arc-extinguishing chamber B and the auxiliary arc-extinguishing chamber D, and a space for installing a balance spring is reserved.
Preferably, the four connection nut type main static contacts at the top of the ceramic arc extinguishing chamber are hung on the conductive plate of the base component by four screws.
Preferably, the arc-isolating piece is made of high-temperature resistant plastic through mould pressing to form a disc structure, and the arc-isolating piece is arranged at the lower end of the ceramic arc-extinguishing chamber, is tightly attached to the circumferential surface and is matched with the circumferential inner wall.
In summary, the invention has the following beneficial effects: 1. the wall thickness of the barrel structure of the ceramic sealed arc extinguishing chamber is reduced by more than 30 percent compared with that of similar foreign rectangular structural products, the compressive strength is increased, the qualification rate of products is improved, and the cost is reduced;
2. the design of permanent magnet magnetic blow-out arc extinction is adopted, and the number of permanent magnets used by the nonpolar direct current contactor is minimum in the prior disclosed invention patent;
3. compared with the existing ceramic sealing similar products, the ceramic sealing bipolar direct current contactor has the advantages that the functions of the ceramic sealing similar products are greatly increased, the structural design is more compact and reasonable, the volume is still small, and the ceramic sealing bipolar direct current contactor is provided with a pre-charging contact and an auxiliary contact and is protected by hydrogen and nitrogen gas. The battery can ensure that one product of the battery is used for replacing one positive electrode control contactor, one negative electrode control contactor, one precharge relay and precharge resistor used in the electric automobile in the prior art. The safety and the use reliability are improved, and the requirements of the novel electric automobile and the charging pile for increasing the high-power development can be met. Has better economic benefit and wide social benefit.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a semi-sectional structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a block diagram of a ceramic arc chute assembly of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a cross-sectional block diagram of a contact support assembly of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a block diagram of a magnetically permeable plate assembly of the present invention;
FIG. 8 is a front view of the arc splitter of the present invention;
FIG. 9 is a bottom view of FIG. 8;
fig. 10 is a schematic diagram of a precharge circuit of the present invention.
The reference numerals are explained as follows:
1. a base assembly; 1.1, a base; 1.2, a conductive plate; 2. a permanent magnet; 3. a ceramic arc extinguishing chamber assembly; 3.1, a ceramic arc extinguishing chamber; 3.2, an auxiliary contact static contact rod; 3.3, a main static contact; 3.4, a first connector; 4. a contact support assembly; 4.1, a support; 4.2, a main contact spring; 4.3, a main contact bridge plate; 4.4, check ring; 4.5, a gasket; 4.6, a counter-force spring; 4.7, thickening the main contact bridge plate; 4.8, arc isolating piece; 4.9, auxiliary springs; 4.10, auxiliary contacts; 4.11, a wiring lug; 4.12, resistance wire; 4.13, balancing springs; 4.14, a guide shaft; 5. a magnetic conductive plate assembly; 5.1, a magnetic conduction plate; 5.2, a second connecting piece; 5.3, armature; 5.4, copper pipe; 5.5, adjusting the pad; 6. a coil; 7. a yoke plate; 8. and a magnet plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
Referring to fig. 1-10, the invention provides a bipolar direct current contactor sealed by nonpolar ceramic, which comprises a base component 1, a ceramic arc extinguishing chamber component 3, a contact support component 4 and a magnetic conduction plate component 5;
as shown in fig. 1, the base assembly 1 comprises a base 1.1 and a conductive plate 1.2; the base 1.1 is designed for protection of the contact system and for product installation.
As shown in fig. 3-4, the ceramic arc-extinguishing chamber assembly 3 includes a ceramic arc-extinguishing chamber 3.1, wherein the ceramic arc-extinguishing chamber 3.1 is a cylinder structure with four cavities, a main arc-extinguishing chamber a and a main arc-extinguishing chamber B are arranged in the middle, an auxiliary arc-extinguishing chamber C is arranged on the left side adjacent to the main arc-extinguishing chamber a, and an auxiliary arc-extinguishing chamber D is arranged on the right side adjacent to the main arc-extinguishing chamber B; after the cylinder structure is metallized, two pairs of wire nut type main static contacts 3.3 are respectively sealed in an A main arc-extinguishing chamber and a B main arc-extinguishing chamber, two pairs of auxiliary contact static contact rods 3.2 are respectively sealed in a C auxiliary arc-extinguishing chamber and a D auxiliary arc-extinguishing chamber, and two holes are formed in the two main arc-extinguishing chambers and used for installing the main static contacts 3.3. A first connecting piece 3.4 is sealed and connected below the ceramic arc extinguishing chamber 3.1; two permanent magnets 2 are arranged in rectangular slots near the main fixed contacts 3.3 of the movable contact bridge extension lines of the two pairs of main fixed contacts 3.3 outside the ceramic arc-extinguishing chamber 3.1 in a face-to-face manner with the N poles and the S poles, and two magnet guiding plates 8 are arranged in the middle line thin wall of the two pairs of main fixed contacts 3.3 inside the ceramic arc-extinguishing chamber 3.1.
As shown in fig. 5-6, the contact support assembly 4 is installed in the ceramic arc extinguishing chamber 3.1, and comprises a support 4.1, a main contact bridge 4.3, an auxiliary contact 4.10, a main contact spring 4.2, an auxiliary spring 4.9 and an arc-isolating member 4.8; the center of the support 4.1 is provided with a central shaft penetrating through the support 4.1 as a guide shaft 4.14, and the diameter of the guide shaft 4.14 is 4mm. The two sides of the guide shaft 4.14 are symmetrically provided with main windows for installing the main contact bridge plates 4.3 and the main contact springs 4.2, the outer sides of the two main windows are provided with auxiliary windows for installing the auxiliary contacts 4.10 and the auxiliary springs 4.9, the main contact bridge plates 4.3 are provided with two sizes, the main contact bridge in the corresponding A main arc extinguishing chamber is a standard plate, the main contact bridge in the corresponding B main arc extinguishing chamber is a thickened main contact bridge plate 4.7, the guide shaft 4.14 at the lower part of the support member 4.1 is provided with a notch for installing the check ring 4.4, a gasket 4.5 is arranged above the check ring 4.4, a counter-force spring 4.6 is arranged above the gasket 4.5, the counter-force spring 4.6 is sleeved on the guide shaft 4.14 and is arranged between the gasket 4.5 and the arc-isolating member 4.8, and the arc-isolating member 4.8 is arranged below the support member 4.1;
as shown in fig. 8 and 9, the arc isolation member 4.8 is a disc structure, and a groove structure formed by double layers and thin walls is arranged at the upper end of the disc structure and in the middle of the lower part of the A, B main arc extinguishing chamber, so that higher insulation voltage between the two circuits is ensured. The thin wall above the arc isolation piece 4.8 disc corresponds to the thin wall of the main arc extinguishing chamber A, the main arc extinguishing chamber B and the two auxiliary arc extinguishing chambers on the outer side to ensure that the arc of each contact breaking is split. A hole is formed in the middle of the disc structure, and a support for placing a counter-force spring 4.6 is arranged around the hole. The lower end of the arc-isolating piece 4.8 disc is provided with a groove for placing the precharge resistor along the circumference, and the diameter of the groove is slightly larger than 4mm for placing the precharge resistor; the auxiliary contact static contact rod 3.2 in the C auxiliary arc-extinguishing chamber is connected with the pre-charging resistor 4.12 and the auxiliary contact static contact rod 3.2 in the D auxiliary arc-extinguishing chamber in series and then is connected with the main static contact 3.3 of the A main arc-extinguishing chamber in parallel (as shown in figure 10); the lower ends of the two pairs of auxiliary contact static contact rods 3.2 are respectively sleeved with a wiring lug 4.11 for connecting a precharge resistor 4.12;
as shown in fig. 7, the magnetic conduction plate assembly 5 is arranged below the ceramic arc extinguishing chamber assembly 3, the magnetic conduction plate assembly 5 comprises a magnetic conduction plate 5.1, a second connecting piece 5.2, an armature 5.3, a copper pipe 5.4 and an adjusting pad 5.5, the second connecting piece 5.2 is a cylinder with an annular round edge formed by stretching a non-magnetic conduction stainless steel sheet, the adjusting pad 5.5 and the armature 5.3 are arranged in the cylinder of the connecting piece, and the armature 5.3 is placed in the middle of the magnetic conduction plate 5.1; the copper pipe 5.4 is welded in the middle of the bottom of the second connecting piece 5.2; the upper part of the guide shaft 4.14 is inserted into a round hole in the middle of the inside of the ceramic arc extinguishing chamber 3.1, and the lower end of the guide shaft passes through a middle hole of the magnetic conduction plate 5.1 and is inserted into the bottom of the middle hole of the armature 5.3 to be contacted with the middle hole. The magnetic conduction plate assembly 5 is sequentially sleeved with a coil 6 and a yoke plate 7, and the yoke plate 7 and the magnetic conduction plate 5.1 are riveted. After the electromagnetic mechanism consisting of the coil 6, the yoke plate 7 and the magnetic conduction plate assembly 5 is electrified, the contact support member assembly 4 pushes the main contact bridge plate 4.3 to move towards the main fixed contact, and meanwhile, the contact support member assembly 4 pushes the auxiliary contact 4.10 to move towards the auxiliary fixed contact.
By adopting the technical scheme, the base 1.1 is designed to be used for protecting a contact system and installing products, and the design of magnetic blowing and arc extinguishing of the permanent magnet 2 is disclosed, two permanent magnets 2 are arranged on the outer parts of the arc extinguishing chambers in a face-to-face manner by four main static contacts, the magnet guiding plates 8 are arranged in the middle of the two main arc extinguishing chambers in the inner part A, B of the ceramic arc extinguishing chamber 3.1, namely, the magnet guiding plates 8 are arranged between the N pole and the S pole, so that the magnetic leakage can be reduced when the distance between the two poles is larger, the magnet guiding plates 8 have better arc burning resistance than the permanent magnets 2, and the non-polar direct current contactor uses the least permanent magnets 2 in the prior published patent.
In the invention, the auxiliary contact 4.10 is used as a precharge switch to control a capacitive load, when the coil 6 of the electromagnetic mechanism is electrified, the armature 5.3 is attracted to push the contact support member assembly 4, so that the main contact of the main arc-extinguishing chamber B and the auxiliary contact 4.10 of the auxiliary contact C firstly close a precharge resistor access circuit to realize precharge, and the main contact of the main arc-extinguishing chamber A is closed to bypass the precharge resistor and the auxiliary contact 4.10 serving as the precharge switch after about a few ms, thereby completing the electrifying process of the capacitive load. The two pairs of nut type main fixed contacts 3.3 and two pairs of auxiliary contact fixed contact rods 3.2 are sealed on the same ceramic arc extinguish chamber 3.1 to form a ceramic sealing arc extinguish chamber assembly, the two main contact plates and the two auxiliary contacts 4.10 are arranged on the same contact support member assembly 4, so that manufacturing errors are greatly reduced, the precharge resistor is bypassed after the precharge circuit is ensured to work, the working procedure is realized by one-time starting and finishing of a patent product, the work is very reliable, the defects of the prior art can be reduced, overlong charging time can not occur, the precharge resistor is burnt out, and the fact that an actual capacitor is not charged (the precharge is finished in a false mode) can not occur to burn out the positive contactor.
As a preferred embodiment, the thickened main bridge plate 4.7 is 0.8-1mm thicker at the contact point than the standard main bridge plate 4.3. The windows of the support piece 4.1 for installing the auxiliary contacts 4.10 and the auxiliary springs 4.9 are designed to be large over-travel contacts, namely, the opening distance of the main fixed contact 3.3 of the main arc-extinguishing chamber A is a normal value, and the opening distances of the two pairs of auxiliary contacts 4.10 and the main fixed contact 3.3 of the main arc-extinguishing chamber B are smaller than the normal value by 0.8-1mm.
The first connecting piece 3.4 sealed by the ceramic arc-extinguishing chamber component and the magnetic conduction plate 5.1 are welded into a whole by laser, and the whole is a contact component. The contact part is vacuumized through the copper pipe 5.4, mixed gas of hydrogen and nitrogen is filled, the copper pipe 5.4 is sealed and leak-detected, and then the assembly coil 6 and the yoke plate 7 are riveted to form a contact system. Four connection nut type main fixed contacts 3.3 at the top of the ceramic arc extinguishing chamber 3.1 are hung on the conductive plate 1.2 of the base component 1 by four M6x12 screws.
The pre-charging resistor is an electrothermal alloy resistance wire 4.12 spring coil with the outer diameter not larger than 4mm, the wire diameter being 0.45mm, the pitch being 0.5mm and the number of turns being 200, and two ends are firmly pressed on a tin phosphor bronze wiring lug 4.11 with the thickness being 0.5 mm. The lower end of the arc-isolating piece 4.8 is provided with a groove with a diameter slightly larger than 4mm along the circumference for placing the pre-charging resistor 4.12.
Two holes are formed in the middle of the wiring lug 4.11, the aperture is 3.1mm, the distance between the two holes is 12mm, an upper layer and a lower layer with an included angle of 10 degrees are formed by folding back the middle, the centers of the two holes are staggered by 0.2mm, and the two holes are respectively sleeved on the corresponding auxiliary contact static contact rod 3.2 by utilizing the tension of the two holes.
The ceramic arc-extinguishing chamber 3.1 is made of high-temperature-resistant high-purity alumina, wherein thin walls are arranged between the main arc-extinguishing chamber A and the auxiliary arc-extinguishing chamber C and between the main arc-extinguishing chamber B and the auxiliary arc-extinguishing chamber D, and a space for installing the balance spring 4.13 is reserved.
The arc-isolating piece 4.8 is made into a disc structure by adopting high-temperature resistant hot plastic in a mould pressing mode, and is arranged at the lower end of the ceramic arc-extinguishing chamber 3.1, closely attached to the circumferential surface and matched with the circumferential inner wall, and the gap is small.
The design structure of the charging pile is more reasonable, the working voltage can reach 800V, the power of the motor is controlled to be more than 120KW, and the requirements of further miniaturization of the charging pile, development increase of power of the electric automobile, and higher reliability and safety can be met.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A bipolar direct current contactor of nonpolar ceramic seal is characterized in that: the device comprises a base assembly, a ceramic arc extinguishing chamber assembly, a contact support member assembly and a magnetic conduction plate assembly;
the base assembly comprises a base and a conductive plate;
the ceramic arc-extinguishing chamber assembly comprises a ceramic arc-extinguishing chamber, wherein the ceramic arc-extinguishing chamber is of a cylindrical structure provided with four cavities, the middle of the ceramic arc-extinguishing chamber is provided with an A main arc-extinguishing chamber and a B main arc-extinguishing chamber, the adjacent left side of the A main arc-extinguishing chamber is provided with a C auxiliary arc-extinguishing chamber, and the adjacent right side of the B main arc-extinguishing chamber is provided with a D auxiliary arc-extinguishing chamber; after the cylinder structure is metallized, two pairs of wire nut type main fixed contacts are respectively sealed in an A main arc-extinguishing chamber and a B main arc-extinguishing chamber, two pairs of auxiliary contact fixed contact rods are respectively sealed in a C auxiliary arc-extinguishing chamber and a D auxiliary arc-extinguishing chamber, and a first connecting piece is sealed below the ceramic arc-extinguishing chamber; two permanent magnets which are arranged in a face-to-face manner of N poles and S poles are arranged in rectangular slotted holes near the main fixed contacts of the movable contact bridge extension lines of the two pairs of main fixed contacts outside the ceramic arc extinguishing chamber, and two magnet guiding plates are arranged in the middle line thin walls of the two pairs of main fixed contacts inside the ceramic arc extinguishing chamber;
the contact support component is arranged in the ceramic arc extinguishing chamber and comprises a support component, a main contact bridge plate, an auxiliary contact, a main contact spring, an auxiliary spring and an arc isolation component; the middle of the supporting piece is provided with a central shaft penetrating through the supporting piece as a guide shaft, two sides of the guide shaft are symmetrically provided with main windows for installing the main contact bridge plate and the main contact springs, the outer sides of the two main windows are provided with auxiliary windows for installing the auxiliary contacts and the auxiliary springs, the main contact bridge plate has two sizes, the main contact bridge in the corresponding B main arc extinguishing chamber is a thickened main contact bridge plate, and the thickened main contact bridge plate is thicker than the main contact bridge plate in the corresponding A main arc extinguishing chamber; the guide shaft at the lower part of the support member is provided with a notch for installing a retainer ring, a gasket is arranged above the retainer ring, a counter-force spring is arranged above the gasket, the counter-force spring is sleeved on the guide shaft and is arranged between the gasket and the arc-isolating member, and the arc-isolating member is arranged below the support member;
the arc isolation piece is of a disc structure, and a groove-shaped structure formed by double layers of thin walls is arranged at the upper end of the disc structure and in the middle of the lower part of the A, B main arc extinguishing chamber; a hole is formed in the middle of the disc structure, and a support for placing a counter-force spring is arranged around the hole; the lower end of the arc isolation piece disc is provided with a groove for accommodating the pre-charging resistor along the circumference, and the auxiliary contact static contact rod in the C auxiliary arc-extinguishing chamber is connected with the pre-charging resistor and the auxiliary contact static contact rod in the D auxiliary arc-extinguishing chamber in series and then connected with the main static contact of the A main arc-extinguishing chamber in parallel; the lower ends of the two pairs of auxiliary contact static contact rods are respectively sleeved with a wiring lug which is used for connecting a precharge resistor;
the magnetic conduction plate assembly is arranged below the ceramic arc extinguish chamber assembly and comprises a magnetic conduction plate, a second connecting piece, an armature, a copper pipe and an adjusting pad, wherein the second connecting piece is a cylinder with an annular round edge formed by stretching a non-magnetic conduction stainless steel sheet, and the adjusting pad and the armature are arranged in the cylinder of the second connecting piece and are arranged in the middle of the magnetic conduction plate; the copper pipe is welded in the middle of the bottom of the second connecting piece; the upper part of the guide shaft is inserted into a round hole in the middle of the inside of the ceramic arc extinguishing chamber, and the lower end of the guide shaft penetrates through a middle hole of the magnetic conduction plate to be inserted into a middle hole of the armature and contacts with the bottom of the armature;
the coil and the yoke plate are sequentially sleeved on the magnetic conduction plate assembly, and the yoke plate and the magnetic conduction plate are riveted;
the thickness of the thickened main contact bridge plate at the contact point is 0.8-1mm thicker than that of the main contact bridge plate in the corresponding main arc extinguishing chamber A;
the first connecting piece sealed below the ceramic arc-extinguishing chamber component and the magnetic conduction plate are welded into a whole by laser, and the whole is a contact component.
2. A bipolar dc contactor according to claim 1, wherein the bipolar dc contactor is sealed with a non-polar ceramic material, and wherein: the windows for installing the auxiliary contacts and the auxiliary springs of the supporting piece are designed into large over-travel contacts, namely, the opening distance of the main fixed contact of the main arc-extinguishing chamber A is larger than that of the main fixed contact of the main arc-extinguishing chamber B, and the opening distances of the two pairs of auxiliary contacts and the main fixed contact of the main arc-extinguishing chamber B are smaller than that of the main fixed contact of the main arc-extinguishing chamber A by 0.8-1mm.
3. A bipolar dc contactor according to claim 1, wherein the bipolar dc contactor is sealed with a non-polar ceramic material, and wherein: the pre-charging resistor is an electrothermal alloy resistance wire spring ring with the outer diameter not larger than 4mm, the wire diameter of 0.45mm, the pitch of 0.5mm and the number of turns of 200, and the two ends of the electrothermal alloy resistance wire spring ring are firmly pressed on a tin-phosphor bronze wiring board with the thickness of 0.5 mm.
4. A bipolar dc contactor as claimed in claim 3, wherein: two holes are formed in the middle of the wiring lug, the aperture is 3.1mm, the distance between the two holes is 12mm, an upper layer and a lower layer with an included angle of 10 degrees are formed by folding back the middle, the centers of the two holes are staggered by 0.2mm, and the two holes are respectively sleeved on the corresponding auxiliary contact static contact rods by utilizing the tension of the two holes.
5. A bipolar dc contactor according to claim 1, wherein the bipolar dc contactor is sealed with a non-polar ceramic material, and wherein: and the ceramic arc extinguishing chamber is filled with hydrogen-nitrogen mixed gas.
6. The bipolar dc contactor of claim 5, wherein said bipolar dc contactor is a bipolar ceramic seal, said bipolar dc contactor comprising: the ceramic arc-extinguishing chamber is made of high-temperature-resistant high-purity alumina, wherein thin walls are arranged between the main arc-extinguishing chamber A and the auxiliary arc-extinguishing chamber C and between the main arc-extinguishing chamber B and the auxiliary arc-extinguishing chamber D, and a space for installing a balance spring is reserved.
7. A bipolar dc contactor according to claim 1, wherein the bipolar dc contactor is sealed with a non-polar ceramic material, and wherein: four wiring nut type main fixed contacts at the top of the ceramic arc extinguishing chamber are hung on a conductive plate of the base assembly by four screws.
8. A bipolar dc contactor according to claim 1, wherein the bipolar dc contactor is sealed with a non-polar ceramic material, and wherein: the arc-isolating piece is made of high-temperature-resistant high-temperature plastic by mould pressing to form a disc structure, and is arranged at the lower end of the ceramic arc-extinguishing chamber, closely attached to the circumferential surface and matched with the circumferential inner wall.
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| CN201811349707.8A CN109256300B (en) | 2018-11-14 | 2018-11-14 | Bipolar direct current contactor of nonpolar ceramic seal |
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| CN201811349707.8A CN109256300B (en) | 2018-11-14 | 2018-11-14 | Bipolar direct current contactor of nonpolar ceramic seal |
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| CN109256300B true CN109256300B (en) | 2024-03-22 |
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| CN109887779B (en) * | 2019-04-02 | 2024-04-09 | 浙江众信新能源科技股份有限公司 | Ceramic sealing auxiliary switch for direct current contactor |
| CN113936963A (en) * | 2021-10-20 | 2022-01-14 | 沈阳二一三控制电器制造有限公司 | Contact assembly and direct current contactor |
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| CN102262981A (en) * | 2011-01-11 | 2011-11-30 | 沈阳二一三控制电器制造有限公司 | Bipolar DC contactor |
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| CN105914107A (en) * | 2016-06-22 | 2016-08-31 | 沈阳二三控制电器制造有限公司 | Contactor connected with capacitive element |
| CN208796916U (en) * | 2018-11-14 | 2019-04-26 | 沈阳二一三控制电器制造有限公司 | A kind of nonpolarity ceramic seal bipolar DC contactor |
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| CN102262981A (en) * | 2011-01-11 | 2011-11-30 | 沈阳二一三控制电器制造有限公司 | Bipolar DC contactor |
| CN102129935A (en) * | 2011-03-10 | 2011-07-20 | 二一三电器深圳有限公司 | Arc quenching system for nonpolar direct current contactor |
| CN102592890A (en) * | 2012-02-20 | 2012-07-18 | 北京航空航天大学 | Non-polar hydrogen mixed gas DC (direct-current) arc extinction system for DC contactor |
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