CN205264618U - Electromagnetic type relay - Google Patents
Electromagnetic type relay Download PDFInfo
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- CN205264618U CN205264618U CN201520975655.0U CN201520975655U CN205264618U CN 205264618 U CN205264618 U CN 205264618U CN 201520975655 U CN201520975655 U CN 201520975655U CN 205264618 U CN205264618 U CN 205264618U
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Abstract
The utility model provides an electromagnetic type relay, is including installing electromagnetic system, the clamshell on the base and be used for the thread off actuator disk pole of action of output, electromagnetic system include supporting rack, setting element, yoke, spring, armature and coil, the setting element is located between supporting rack and the yoke, the coil suit is on the iron core of yoke, armature one end can be installed on the supporting rack with overturning, the iron core of the other end and yoke sets up relatively, the one end and the supporting rack of spring are connected, the other end and the armature of spring are connected. This kind of electromagnetic relay characteristic is stable, and action power is little, and sensitivity is high, and the mechanical stability is high, has the ability of anti electromagnetic shock wave, can be used as the circuit breaker annex.
Description
Technical field
The utility model belongs to Low Voltage Electrical Apparatus, relates to a kind of electromagnetic relay, and particularly one can be used forThe electromagnetic type relay of circuit breaker accessory.
Background technology
Electromagnetic type relay is that breaker drives its operating mechanism to carry out a kind of important accessory of threading off and tripping, electricityWhen electromagnetic relay coordinates breaker to use, need to meet the requirement of function and the acting characteristic of electrical apparatus release, asStability, the reliability of work, speed and the sensitivity etc. of the action of threading off. Electromagnetic type relay and breakerIn conventional wink moving electrical apparatus release, overload release installation connected mode be different, wink is moved electrical apparatus release, mistakeCarrying electrical apparatus release is to be all connected in controlled main circuit, and the kinetic energy of the action of threading off is the short circuit electricity by main circuitStream or overload current provide, and the kinetic energy of the dropout that electromagnetic type relay provides action is by control deviceExciting current (voltage) provides, therefore the requirement of the stability to its action, reliability and sensitivity ratioHigher, user needs a kind of acting characteristic stable, and highly sensitive electromagnetic type relay, can meet dropoutDevice function, to coordinate breaker to use. In addition, user comprises peace to the instructions for use of electromagnetic type relayHolding position is not subject to the layout restrictions of controlled main circuit, and the also layout restrictions of uncontrolled device is even wantedCan meet the needs of Long-distance Control, therefore require electromagnetic type relay to there is the overall structure of separate accessories, toolThere are versatility installation connection, compact conformation, the small and exquisite merit of volume of being convenient to comprise mechanical connection and electrical connectionCan, can also meet extensive, high efficiency, production requirement cheaply simultaneously.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of electromagnetic type relay of the user's of meeting above-mentioned requirements,This relay characteristic is stable, and operating power is little, highly sensitive, and mechanical stability is high, has anti-electromagnetic impactThe ability of ripple, can be used for circuit breaker accessory.
For achieving the above object, the utility model has adopted following technical scheme.
A kind of electromagnetic type relay, comprise the electromagnetic system 2 that is arranged on base 1, clamshell 3 and forThe actuator lever 4 of output dropout action, described electromagnetic system 2 comprises bearing support 21, keeper 22, yoke23, spring 24, armature 25 and coil 26, keeper 22 between bearing support 21 and yoke 23,Coil 26 is sleeved on the iron core 232 of yoke 23, and armature 25 one end are arranged on bearing support 21 turninglyUpper, the iron core 232 of the other end and yoke 23 is oppositely arranged, and one end of spring 24 is connected with bearing support 21,The other end of spring 24 is connected with armature 25.
Preferably, bearing support 21 one end of described electromagnetic system 2 are connected with one end of yoke 23, bearing support21 other ends are fixedly connected with yoke by keeper 22, bearing support 21, keeper 22 and yoke 23 phasesLocation is fixedly connected with mutually.
Preferably, described keeper 22 is nonmagnetic substance for locating yoke 23 and bearing support 21The keeper of relative position.
Preferably, described armature 25 surrounds electromagnetic system 2 with the iron core 232 in yoke 23 and yoke 23Magnetic circuit, the armature 25 on magnetic circuit coordinates with iron core 232 adhesives, armature 25 contacts and joins with yoke 23Close; Described magnetic circuit is the electromagnetic circuit of getting involved without permanent magnet.
Preferably, described electromagnetic system 2 is fixedly mounted on base 1 by yoke 23 and/or keeper 22On; On described base 1, on the position corresponding with draw-in groove 31, be provided with buckle 11, and, clamshell 3Be fixedly installed on base 1 by buckle 11 and the clamping of draw-in groove 31, thereby electromagnetic system 2 is installedIn the cavity jointly being surrounded by base 1 and clamshell 3.
Preferably, described yoke 23 comprises the iron core 232, support 231 and the connecting portion that connect successively233; Described iron core 232 is inserted in the centre bore 262 of coil 26 and exposes from centre bore 262, withThe armature 25 of realizing on magnetic circuit coordinates with the adhesive of iron core 232; Described support 231 is solid with base 1Fixed connection, the bottom butt of the skeleton 261 of coil 26 is arranged on this support 231; Described connectionPortion 233 and keeper 22 location are fixedly connected with, to realize being connected of armature 25 on magnetic circuit and yoke 23The contact of portion 233 coordinates.
Preferably, the armature 25 of described electromagnetic system 2 comprises actuation ends 251, mounting groove 252 and springConnecting portion 253, described mounting groove 252, between actuation ends 251 and spring connecting portion 253, activatesThe two ends of end 251 are provided with adhesive auxiliary section 25a and contact auxiliary section 25b; Described armature 25 is by peaceTankage 252 is arranged on the supporting mounting groove 212 of bearing support 21 turningly, the armature on described magnetic circuit25 coordinate adhesive auxiliary section 25a and the magnetic in the actuation ends 251 that refers to armature 25 with the adhesive of iron core 232The top 23a adhesive of the iron core 232 of yoke 23 coordinates, the armature 25 on magnetic circuit and the connecting portion of yoke 23233 contact coordinates contact auxiliary section 25b in the actuation ends 251 that refers to armature 25 and the company of yoke 23The top 23b contact that meets portion 233 coordinates.
Preferably, on the bearing support 21 of described electromagnetic system 2, be provided with the supporting connecting portion 211 of V-type,The end of supporting connecting portion 211 1 side sidewalls is provided with supporting mounting groove 212, opposite side sidewall and keeper 22Location is fixedly connected with; The bottom opening of the supporting connecting portion 211 of V-type is bent to form spring(-supported) mount 213 laterally,Supporting mounting groove 212 is connected with the mounting groove 252 of armature 25.
Preferably, support 231 and the base 1 of described yoke 23 be arranged in parallel, and connecting portion 233 tiltsParallel with connecting portion 233, the described electricity of one side sidewall of the supporting connecting portion 211 of bearing support 21 is set22 whiles and the connecting portion 233 of yoke 23 and the supporting connecting portion of bearing support 21 of keeper of magnetic system 2211 are located by connecting, and the bottom of described keeper 22 is connected with base 1 supporting.
Preferably, the coil 26 of described electromagnetic system 2 comprises skeleton 261, centre bore 262 and is sleeved onWinding 263 outside centre bore 262, the binding post 27 of described electromagnetic system 2 is inserted into described skeleton261 bottom; One end of the spring 24 of described electromagnetic system 2 is connected with bearing support 21, spring 24The other end is connected with armature 25, and the elastic force of spring 24 is for ordering about the iron core 232 of armature 25 and yoke 23Separate.
The advantage of electromagnetic type relay of the present utility model is, by the optimal design of concrete structure, not onlyCan effectively simplify internal structure, reduce overall volume, enhance productivity and reduce manufacturing cost, but alsoCan effectively improve stability, reliability and the sensitivity of electromagnetic system, there is the ability of anti-electromagnetic shock wave,Can be used for circuit breaker accessory, the universal performance of extended products.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the surface structure of electromagnetic type relay of the present utility model.
Fig. 2 is the perspective view of the electromagnetic system of electromagnetic type relay of the present utility model.
Fig. 3 is the another perspective view of the electromagnetic system of electromagnetic type relay of the present utility model.
Fig. 4 is the perspective view of the base in electromagnetic type relay of the present utility model.
Fig. 5 is the perspective view of the bearing support of electromagnetic system of the present utility model.
Fig. 6 is the perspective view of the yoke of electromagnetic system of the present utility model.
Fig. 7 is the perspective view of the coil of electromagnetic system of the present utility model.
Fig. 8 is the perspective view of the armature of electromagnetic system of the present utility model.
Detailed description of the invention
The embodiment providing below in conjunction with accompanying drawing 1 to 8, further illustrates the utility model electromagnetic type relayDetailed description of the invention, from the description of accompanying drawing illustrated embodiment, can more clearly find out of the present utility model excellentPoint and feature.
As Figure 1-3, electromagnetic type relay of the present utility model comprises base 1, is arranged on base 1Electromagnetic system 2, clamshell 3 and for exporting the actuator lever 4 of the action of threading off, actuator lever 4 can be moved by straight lineBe arranged on clamshell 3 the inner that is positioned at clamshell 3 of actuator lever 4 and the armature 25 of electromagnetic system 2 movinglyActuation ends 251 transmissions coordinate, actuator lever 4 stretch out outer end outside clamshell 3 and the dropout part of breaker(not shown) transmission coordinates. Electromagnetic system 2 is fixedly mounted on by base 1 and clamshell 3 and jointly enclosesIn the cavity becoming, so that electromagnetic type relay has the overall structure for the separate accessories of breaker, be convenient toVersatility is installed and is connected, and the extended clamshell 3 of binding post 27 on electromagnetic system 2 is outer for electrical connection.
The electromagnetic system 2 of electromagnetic type relay of the present utility model comprises bearing support 21, keeper 22, magneticYoke 23, spring 24, armature 25 and coil 26, keeper 22 between bearing support 21 and yoke 23,Described bearing support 21, keeper 22 and yoke 23 are fixedly connected with location mutually, and coil 26 is sleeved on magneticOn the iron core 232 of yoke 23, armature 25 one end are arranged on bearing support 21 turningly, the other end and magneticThe iron core 232 of yoke 23 is oppositely arranged, and one end of spring 24 is connected with bearing support 21, another of spring 24End is connected with armature 25. Described bearing support 21 one end are connected with one end of yoke 23, and bearing support 21 is anotherOne end is fixedly connected with yoke by keeper 22, and bearing support 21, keeper 22 and yoke 23 are mutually fixedPosition is fixedly connected with, between bearing support 21, keeper 22 and yoke 23, is not only mutually permanently connected, andAlso have the precision of mutual location, the structure that this location is fixedly connected with can have various ways, as securing member connectsConnect, rivet, welding etc. Described electromagnetic system 2 fixedly mounts by yoke 23 and/or keeper 22On base 1. On the base 1 of electromagnetic type relay, be provided with buckle 11, on clamshell 3, be provided with draw-in groove31, clamshell 3 is fixedly installed on base 1 by buckle 11 and the clamping of draw-in groove 31.
Shown in Fig. 5,8, described armature 25 is arranged on bearing support 21 turningly, specifically knotStructure as, armature 25 by the mounting groove 252 on it turning be arranged on the supporting mounting groove of bearing support 21On 212, make armature 25 to spin upside down swing taking supporting mounting groove 212 as fulcrum. In conjunction with Fig. 6,7Shown in, shown coil 26 is sleeved on the iron core 232 of yoke 23 so that armature 25 and yoke 23 andIron core 232 on it surrounds magnetic circuit, and the armature 25 on this magnetic circuit coordinates with iron core 232 adhesives, armature25 contact cooperation with yoke 23. Referring to Fig. 2, one end of described spring 24 is connected with bearing support 21,The other end of spring 24 is connected with armature 25, and the elastic force of spring 24 orders about armature 25 and separates with iron core 232.Yoke 23 and armature 25 preferably adopt good permeability magnetic material composition, in order to ensure the working stability of electromagnetic system 2Property and service life, described magnetic circuit be without permanent magnet get involved electromagnetic circuit, keeper 22 adopts non-magneticProperty material make, it is only a part that mechanical stationary positioned is used, as yoke 23 and bearing support 21 phasesTo the location of position, that is: the magnetic circuit being surrounded by yoke 23 and armature 25 is not subject to permanent magnet (as permanent magnet)Magnetic fields, the member that has an annexation with yoke 23 as keeper 22 avoids adopting magneticMaterial, it does not have magnetic flux or produces the function in magnetic field. Because if get involved permanent magnet in above-mentioned magnetic circuit,The electromagnetic field producing due to coil 26 so inevitably moves back for magnetization and the permanent magnet of permanent magnetMagnetic action, can affect job stability and the reliability of electromagnetic system 2, and the magnetic of permanent magnet is with service timeDegeneration, can affect service life of electromagnetic system 2. Above-mentioned armature 25 is joined with the adhesive of iron core 232Close and refer to: have exciting current (voltage) in coil 26 time, armature 25 is ordered about in the magnetic field that coil 26 producesAdhesive with iron core 232; Interior during without exciting current (voltage) at coil 26, the elastic force of spring 24 orders aboutArmature 25 separates with iron core 232. Above-mentioned armature 25 coordinates and refers to contacting of yoke 23: at armatureWhen 25 adhesives swing, armature 25 contacts with yoke 23, to guarantee the maximization of the magnetic flux in magnetic circuit; In rankIron 25 separates while swing, and armature 25 can contact with yoke 23, also can separate. Specifically, instituteOn the armature 25 of the electromagnetic system 2 of stating, be provided with mounting groove 252, spring connecting portion 253, actuation ends 251,Mounting groove 252 is between actuation ends 251 and spring connecting portion 253, and the two ends of actuation ends 251 are provided withAdhesive auxiliary section 25a with contact auxiliary section 25b; Armature 25 by mounting groove 252 turning be arranged onOn the supporting mounting groove 212 of bolster 21, actuation ends 251 can be with mounting groove 252 with spring connecting portion 253For the flip-flop movement of making seesaw type of fulcrum. The top of the iron core 232 of adhesive auxiliary section 25a and yoke 23End 23a adhesive coordinates, and contact auxiliary section 25b contacts and joins with the top 23b of the connecting portion 233 of yoke 23Close, actuation ends 251 coordinates with actuator lever 4 transmissions, that is: interior without exciting current (voltage) at coil 26Time, the adhesive auxiliary section 25a that the elastic force of spring 24 orders about armature 25 separates with the top 23a of iron core 232,Actuation ends 251 drives actuator lever 4 outwards to eject; In the time having exciting current (voltage) in coil 26, lineThe top 23a adhesive of adhesive auxiliary section 25a and the iron core 232 of armature 25 is ordered about in the magnetic field that circle 26 produces,Actuator lever 4 is past being retracted under its resetting structure (not shown) action effect; The ejection of actuator lever 4The outwards control action of output of electromagnetic type relay is namely moved in/indentation, and this control action can be used for opening circuitThe dropout of the operating mechanism of device, also can be used for the closure/disjunction of the contact apparatus of other device for switching.
The yoke 23 of described electromagnetic system 2 comprises iron core 232, the support 231 connecting successively and is connectedPortion 233, yoke 23 is one and has by iron core 232, support 231, connecting portion 233 and connect successivelyThe one-piece parts of feature, it adopts and can process by stamping forming sheet material. Iron core 232 is inserted into coil 26Centre bore 262 in, the top 23a of the iron core 232 exposing from centre bore 262 and armature 25 adhesives are joinedClose. Support 231 is fixedly connected with base 1, and the bottom butt of the skeleton 261 of coil 26 is arranged on and props upHold in portion 231. Connecting portion 233 is fixedly connected with keeper 22 location, the top 23b of connecting portion 233Contact cooperation with armature 25. On described bearing support 21, be provided with the supporting connecting portion 211 of V-type, supportingThe end of connecting portion 211 1 side sidewalls is provided with supporting mounting groove 212, and opposite side sidewall and keeper 22 are locatedBe fixedly connected with; The bottom opening of the supporting connecting portion 211 of V-type is bent to form spring(-supported) mount 213 laterally; ?Holding mounting groove 212 coordinates supporting installation to be connected with the mounting groove 252 of armature 25. The supporting of described yoke 23Portion 231 be arranged in parallel with base 1, and connecting portion 233 is obliquely installed, the supporting connecting portion 211 of bearing support 21A side sidewall parallel with connecting portion 233, the keeper of described electromagnetic system 2 22 is simultaneously and yoke 23Connecting portion 233 and the supporting connecting portion 211 of bearing support 21 be located by connecting. Because bearing support 21 adopts plateMaterial punch forming processes, and for the ease of punch forming, needs to simplify the shape and structure of bearing support 21, because ofThis adopts the structure of keeper 22 as the transition piece being fixedly connected with, so that bearing support 21 is fixed to yoke 23Connecting portion 233 on, the keeper of nonmagnetic substance 22 is as the fixed pedestal of yoke 23, thereby formsDescribed 22 whiles and the connecting portion 233 of yoke 23 and the supporting connecting portion 211 of bearing support 21 of keeperPositioning connection structure, obviously the feature of this structure is to ensure the cooperation that contacts of yoke 23 and armature 25,Improve the building-up property of yoke 23 and bearing support 21, certainly, can also optionally form keeper 221 supporting of bottom and base be connected, to strengthen being fixedly connected with and locating of electromagnetic system 2 and base 1.
The coil 26 of described electromagnetic system 2 comprises skeleton 261, centre bore 262 and winding 263; Winding263 are sleeved on outside centre bore 262, and binding post 27 is inserted into the bottom of skeleton 261. At the end of skeleton 261Portion's butt is arranged on the support 231 of yoke 23, and after support 231 is fixedly connected with base 1,Binding post 27 is also fixedly mounted on base 1, and stretches out clamshell 3 outer (as shown in Figure 1), to carryFor convenient, the reliable mode of connection.
Above content is further saying in detail of the utility model being done in conjunction with concrete preferred embodimentBright, can not assert that concrete enforcement of the present utility model is confined to these explanations. Under the utility modelThe those of ordinary skill of technical field, without departing from the concept of the premise utility, can also doGo out some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. an electromagnetic type relay, comprises the electromagnetic system (2), the clamshell that are arranged on base (1)(3) and for export thread off action actuator lever (4), it is characterized in that: described electromagnetic system (2)Comprise bearing support (21), keeper (22), yoke (23), spring (24), armature (25) andCoil (26), keeper (22) is positioned between bearing support (21) and yoke (23), coil (26)The iron core (232) that is sleeved on yoke (23) is upper, and armature (25) one end is arranged on bearing support turningly(21) upper, the iron core (232) of the other end and yoke (23) is oppositely arranged, one end of spring (24)Be connected with bearing support (21), the other end of spring (24) is connected with armature (25).
2. electromagnetic type relay according to claim 1, is characterized in that: described electromagnetic system (2)Bearing support (21) one end be connected with one end of yoke (23), bearing support (21) other end by locationPart (22) is fixedly connected with yoke, and bearing support (21), keeper (22) and yoke (23) are mutually fixedPosition is fixedly connected with.
3. electromagnetic type relay according to claim 1, is characterized in that: described keeper (22)For nonmagnetic substance for locating the keeper of yoke (23) and bearing support (21) relative position.
4. electromagnetic type relay according to claim 1, is characterized in that: described armature (25)Surround the magnetic circuit of electromagnetic system (2) with the iron core (232) in yoke (23) and yoke (23), at magneticArmature (25) on road coordinates with iron core (232) adhesive, and armature (25) contacts and joins with yoke (23)Close; Described magnetic circuit is the electromagnetic circuit of getting involved without permanent magnet.
5. electromagnetic type relay according to claim 1, is characterized in that: described electromagnetic system(2) be fixedly mounted on base (1) by yoke (23) and/or keeper (22); The described endSeat (1) is provided with buckle (11) on the upper position corresponding with draw-in groove (31), and, clamshell (3)Be fixedly installed to base (1) by buckle (11) and the clamping of draw-in groove (31) upper, thereby by electromagnetismSystem (2) is arranged in the cavity jointly being surrounded by base (1) and clamshell (3).
6. electromagnetic type relay according to claim 4, is characterized in that: described yoke (23)Comprise the iron core (232), support (231) and the connecting portion (233) that connect successively; Described iron core(232) be inserted in the centre bore (262) of coil (26) and expose from centre bore (262), with realityArmature (25) on existing magnetic circuit coordinates with the adhesive of iron core (232); Described support (231) and the endSeat (1) is fixedly connected with, and the bottom butt of the skeleton (261) of coil (26) is arranged on this support (231)On; Described connecting portion (233) is fixedly connected with keeper (22) location, to realize the rank on magnetic circuitThe connecting portion (233) of iron (25) and yoke (23) contact cooperation.
7. electromagnetic type relay according to claim 6, is characterized in that: described electromagnetic system(2) armature (25) comprises actuation ends (251), mounting groove (252) and spring connecting portion (253),Described mounting groove (252) is positioned between actuation ends (251) and spring connecting portion (253), actuation ends(251) two ends are provided with adhesive auxiliary section (25a) and contact auxiliary section (25b); Described armature(25) by mounting groove (252) turning be arranged on the supporting mounting groove (212) of bearing support (21)Upper, the armature (25) on described magnetic circuit coordinates and refers to causing of armature (25) with the adhesive of iron core (232)The top (23a) of the adhesive auxiliary section (25a) on moved end (251) and the iron core (232) of yoke (23)Adhesive coordinates, and the armature (25) on magnetic circuit with the cooperation that contacts of the connecting portion (233) of yoke (23) isContact auxiliary section (25b) in the actuation ends (251) of finger armature (25) and the connecting portion of yoke (23)(233) top (23b) contact coordinates.
8. electromagnetic type relay according to claim 6, is characterized in that: described electromagnetic system(2) on bearing support (21), be provided with the supporting connecting portion (211) of V-type, supporting connecting portion (211)The end of one side sidewall is provided with supporting mounting groove (212), and opposite side sidewall and keeper (22) location is solidFixed connection; The bottom opening of the supporting connecting portion (211) of V-type is bent to form spring(-supported) mount (213) laterally,Supporting mounting groove (212) is connected with the mounting groove (252) of armature (25).
9. electromagnetic type relay according to claim 8, is characterized in that: described yoke (23)Support (231) and base (1) be arranged in parallel, connecting portion (233) is obliquely installed, bearing support (21)Parallel with connecting portion (233), the described electromagnetic system (2) of a side sidewall of supporting connecting portion (211)Keeper (22) simultaneously and the connecting portion (233) of yoke (23) and the supporting of bearing support (21) companyMeet portion (211) and be located by connecting, and the bottom of described keeper (22) and base (1) supporting connectConnect.
10. electromagnetic type relay according to claim 1, is characterized in that: described electromagnetic system(2) coil (26) comprises skeleton (261), centre bore (262) and is sleeved on centre bore (262)Outer winding (263), the binding post (27) of described electromagnetic system (2) is inserted into described skeleton (261)Bottom; One end of the spring (24) of described electromagnetic system (2) is connected with bearing support (21), bulletThe other end of spring (24) is connected with armature (25), and the elastic force of spring (24) is used for ordering about armature (25)Separate with the iron core (232) of yoke (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520975655.0U CN205264618U (en) | 2015-12-01 | 2015-12-01 | Electromagnetic type relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520975655.0U CN205264618U (en) | 2015-12-01 | 2015-12-01 | Electromagnetic type relay |
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| Publication Number | Publication Date |
|---|---|
| CN205264618U true CN205264618U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520975655.0U Active CN205264618U (en) | 2015-12-01 | 2015-12-01 | Electromagnetic type relay |
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| CN (1) | CN205264618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767511A (en) * | 2019-11-01 | 2020-02-07 | 哈尔滨工业大学 | Magnetic circuit structure for hydraulic electromagnetic release |
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2015
- 2015-12-01 CN CN201520975655.0U patent/CN205264618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767511A (en) * | 2019-11-01 | 2020-02-07 | 哈尔滨工业大学 | Magnetic circuit structure for hydraulic electromagnetic release |
| CN110767511B (en) * | 2019-11-01 | 2021-09-17 | 哈尔滨工业大学 | Magnetic circuit structure for hydraulic electromagnetic release |
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