CN209118996U - Closed type protector for motor - Google Patents

Abstract

The utility model discloses a kind of closed type protectors for motor comprising: shell is fixedly provided with stationary contact on shell；Base assembly, shell and base assembly are hermetically fitted together to limit inner space；The disk of encapsulation in the interior space; the movable contact that can be moved is equipped on disk; disk is configured to that movable contact is enable to move between on position and off position; in on-position; movable contact and stationary contact are in contact with each other so that protector is connected; in open position, movable contact is separated with stationary contact so that protector disconnects；And the film resistor component of inert gas environment is encapsulated in the interior space and can be suitable for, film resistor component be configured to extend the time for making movable contact be in open position after movable contact moves to open position from on-position.The utility model further relate to it is a kind of can install and using the closed type protector motor.

Description

Closed type protector for motor

Technical field

The utility model relates to a kind of closed type protectors for motor.The utility model, which further relates to one kind, to be installed With the motor for using the closed type protector.

Background technique

Protector is a kind of motor guarantor that the rapid bending using disk when being more than protection temperature connects come disconnecting circuit Protection unit.Disk usually by two layers or three layers of different alloy combination together, when there is electric current to pass through, disk can generate heat.Work as electricity When machine works normally, the stationary contact on movable contact and protector housing on disk is in the closed state contacted with each other, so that The operating circuit normally of motor.When the temperature of disk is due to the excessively high original of short circuit, current overload or environment temperature When thus reaching protection temperature, since the thermal expansion coefficient of different alloys is different, disk is because rapid by thermogenetic internal stress It is bent and protector is made to carry out protection operation, so that movable contact and stationary contact are separated to cut off the operating circuit of motor, to rise To heat protective effect.Protector fits together in which should be close to machine winding with motor, accurately to perceive machine winding Temperature change.

Common protector mainly includes self-recovering type protector and self-retaining protector two types on motor.From Recovery formula protector is after protection operation, once the temperature of disk drops below reset temperature, protector will answer automatically Position makes electrical power to work on.

Existing self-retaining protector by be added PTC element (i.e. the temperature-sensitive element of positive temperature coefficient, it is usually ceramic PTC element) and can be realized the self-retaining function for keeping the operating circuit of motor to disconnect by protector.For such self-sustaining Formula protector, it is necessary to manually disconnect power supply and wait until that the disk of protector is cooled to lower than after reset temperature always, protect Device is just capable of resetting.Self-retaining protector will not be such that the working power of motor is repeatedly switched on and off, and thus, it is possible to reduce to protect The action frequency of device is protected, to significantly extend the service life of protector.

However, such PTC element needs the structure change inside oxygen atom intervention participation at work, therefore can only fit For aerobic environment such as air environment.And in inert gas environment, because being participated in without oxygen atom, PTC element meeting There is the case where electric parameter decline is to can not work normally.Therefore, it is often faced in the closed type protector for motor Inert gas application environment in, the self-recovering type protector without self-retaining function can only be used, and be not available including The self-retaining protector of PTC element.

Utility model content

In view of the above-mentioned drawbacks in the prior art, on the one hand, the utility model provides a kind of sealing for motor Type protector comprising:

Shell is fixedly provided with stationary contact on the housing；

Base assembly, the shell and the base assembly are hermetically fitted together to limit inner space；

The disk being encapsulated in the inner space is equipped with the movable contact that can be moved, the disk on the disk It is configured to that the movable contact is enable to move between on position and off position, it is described dynamic in the on-position Contact and the stationary contact are in contact with each other so that the closed type protector is connected, in the open position, the movable contact with The stationary contact separates so that the closed type protector disconnects；And

It is encapsulated in the inner space and can be suitable for the film resistor component of inert gas environment, the thin-film electro Resistance component, which is configured to extend after the movable contact moves to the open position from the on-position, makes described move Contact is in the time of the open position.

In one embodiment of closed type protector, the disk is configured to make institute in the nominal situation of motor It states movable contact and is in the on-position being in contact with each other with the stationary contact, and in the closed type protector because motor goes out Show unusual service condition and carries out making the movable contact be in the open position separated with the stationary contact when protection operation.

It is protected different from the self-recovering type protector in the prior art for motor and the self-retaining including PTC element Protect device, the closed type protector of the utility model by addition film resistor component can extend in inert gas environment by The time that protector keeps the operating circuit of motor to disconnect, so as to realize the self-sustaining function of protector to a certain extent Energy.For such closed type protector, film resistor component can generate heat in the range of its power allows and significantly extend The turnaround time of disk, until the disk of protector is cooled to lower than reset temperature, protector is just capable of resetting.It is such close Envelope type protector can not only work normally in inert gas environment, and provide a degree of self-sustaining for protector Function, so that the working power of motor will not be made repeatedly to be switched on and off.Therefore, the action frequency of protector can be reduced, To significantly extend the service life of protector.

In one embodiment of closed type protector, the base assembly includes pedestal, guide post and containment member, described Film resistor component includes film resistor component and holding member, and the containment member is configured to seal the pedestal group Part, the holding member are configured to fix the film resistor component and keep the film resistor component and the guide post Contact.By the holding member, it can facilitate and reliably install, dismantle and keep the film resistor component, and energy Enough ensure the steady contact between guide post and film resistor component.

In one embodiment of closed type protector, the film resistor component includes a film resistor component and two A holding member, the first end of each holding member are socketed on film resistor component, and the second of each holding member End is welded on the base assembly.

In one embodiment of closed type protector, the holding member is spring element.

In one embodiment of closed type protector, the spring element is made of qin steel wire.

In one embodiment of closed type protector, the shell and base assembly carry out group by welding Dress.Thereby, it is possible to ensure the good sealing performance of closed type protector, closed type protector is enable to pass through defined pressure Test, so that closed type protector be enable to be suitable for working environment (such as the work of inert gas with stringent seal request Make environment).

In one embodiment of closed type protector, the closed type protector further includes disk support component and fever Element, the disk are fixed on the first surface of the disk support component, and the heater element is fixed on the dish On the second surface opposite with the first surface of piece support component.

In one embodiment of closed type protector, the film resistor component is column resistance or Chip-R.

On the other hand, the utility model further relates to a kind of motor, can install and use above-mentioned class on the motor The closed type protector of type.

Detailed description of the invention

Consider the description of the following preferred embodiment to the utility model in conjunction with the accompanying drawings, the utility model it is each Kind target, feature and advantage will become apparent.Attached drawing is only the exemplary diagram of the utility model, is not necessarily It is drawn to scale.In the accompanying drawings, same appended drawing reference always shows same or similar component.

Fig. 1 is the longitudinal sectional view of closed type protector according to the present utility model；

Fig. 2 is the decomposition diagram of closed type protector according to the present utility model；

Fig. 3 A-3E is the schematic diagram for the assembling process of closed type protector according to the present utility model；And

Fig. 4 A-4B is the working principle explanatory diagram of closed type protector according to the present utility model.

Specific embodiment

The description disclosure that hereinafter reference will be made to the drawings, attached drawing therein show preferred embodiment of the present disclosure.However it should Understand, the disclosure can show in a number of different manners, it is not limited to embodiment as described below；It is true On, embodiment as described below is intended to make the disclosure of the disclosure more complete, and absolutely proves to those skilled in the art The protection scope of the disclosure.It is to be further understood that embodiment disclosed herein can be combined in various ways, to mention For more additional embodiments.

It should be understood that in all the appended drawings, identical appended drawing reference indicates identical element.It in the accompanying drawings, is clear The size of Chu Qijian, certain features can be deformed.

Unless otherwise stated, the term as used herein (including technical terms and scientific terms) should have this practical new The those of ordinary skill of technical field involved in type is it can be generally understood that the meaning arrived.Unless otherwise stated, illustrating Term " includes " used in book and claims and "comprising" should be construed as open meaning, that is to say, that " packet Include " and "comprising" should be construed as it is synonymous with term " including at least " or " including at least ".

Unless otherwise stated, term " on " used in the utility model, "lower", "top", "bottom" etc. are protections Relative bearing of device in the state of as shown in the figure.

It should be understood that the terminology in specification is only used for description specific embodiment, it is no intended to limit the disclosure. For the sake of concise and/or is clear, well known function or structure can be no longer described in detail.

In view of the above-mentioned drawbacks in the prior art, the utility model provides a kind of closed type protector.Referring to Fig.1-4, One embodiment of the closed type protector 1 according to the present utility model for motor is shown.

Fig. 1 is the longitudinal sectional view of the closed type protector 1 for motor.Fig. 2 is the exploded pictorial of closed type protector 1 Figure.As depicted in figs. 1 and 2, protector 1 includes shell 2 and base assembly 3, and shell 2 and base assembly 3 hermetically assemble Together to limit inner space.Preferably, shell 2 and base assembly 3 by way of welding together at welding surface into Row assembling.Thereby, it is possible to ensure the good sealing performance of closed type protector 1, so that closed type protector 1 be enable to be applicable in In the working environment (such as working environment of inert gas) with stringent seal request.

Further, as depicted in figs. 1 and 2, stationary contact 5 is fixedly provided on shell 2.In addition, base assembly 3 includes Pedestal, the guide post 4 being integrally provided on pedestal and containment member 12.Wherein, guide post 4 is disposed across base assembly 3 and prolongs The inside of protector 1 is reached to realize and be electrically connected with internal component.

As depicted in figs. 1 and 2, it is packaged in the inner space defined by the shell 2 and base assembly 3 as protector 1 Disk 6, together by two layers or three layers of different alloy combination, when there is electric current to pass through, disk 6 can generate heat disk 6.Wherein, dish The front of piece 6 is the biggish surface of thermal expansion coefficient, and the back side of disk 6 is the lesser surface of thermal expansion coefficient.

As depicted in figs. 1 and 2, the movable contact 7 that can be moved, the disk 6 are equipped in a positive end for disk 6 It is configured to that movable contact 7 is enable to move between on position and off position.In the on-position, movable contact 7 with Stationary contact 5 is in contact with each other so that protector 1 is connected；In the open position, movable contact 7 is separated with stationary contact 5 so that protector 1 It disconnects.

Preferably, the disk 6 of protector 1 can be configured to make in the nominal situation of motor movable contact 7 and stationary contact 5 that This contact, and carry out making movable contact 7 from stationary contact when protection operates because motor unusual service condition occurs in closed type protector 1 5 separation.

As depicted in figs. 1 and 2, it is packaged in the inner space defined by the shell 2 and base assembly 3 as protector 1 It can be suitable for the film resistor component of inert gas environment, the film resistor component includes film resistor component 8 and keeps It component 9 and is configured to extend after the open position that the on-position of protector moves to protector in movable contact 7 Movable contact 7 is set to be in the time of open position.The resistance value of film resistor component 8 can be selected according to concrete application.Example Such as, for closed temperature to be set as to 80 degrees Celsius of closed type protector, the resistance value of film resistor component 8 can be set For 70k Ω；It, can be by the resistance of film resistor component 8 for closed temperature to be set as to 95 degrees Celsius of closed type protector Value is set as 60k Ω.Holding member 9 be configured to fixed film resistor component 8 and keep entire film resistor component with The guide post 4 of base assembly 3 steadily contacts.

According in closed type protector 1 provided by the utility model, film resistor component can be in the permission of its power Range internal heat generation and the turnaround time for significantly extending disk 6, until the disk 6 of protector 1 is cooled to lower than reset temperature, Protector 1 is just capable of resetting.It can be suitable for the film resistor group of inert gas environment by being arranged in closed type protector 1 Part can not only allow closed type protector 1 to work normally in inert gas environment, and provide certain journey for protector 1 The self-retaining function of degree, so that the working power of motor will not be made repeatedly to be switched on and off.Therefore, protector 1 can be reduced Action frequency, thus significantly extend protector 1 service life.

Preferably, as depicted in figs. 1 and 2, film resistor component includes a film resistor component 8 and two holding members 9 (i.e. Fig. 2 shows holding member 9-1 and holding member 9-2).Wherein, the first end of each holding member 9 is socketed in film In resistive elements 8, and the second end of each holding member 9 is welded on base assembly 3.Pass through holding member 9 as a result, It can conveniently and reliably install, dismantle and keep film resistor component 8, and can ensure guide post 4 and film resistor component Between steady contact.Preferably, film resistor component 8 can be column resistance or Chip-R.

Preferably, holding member 9 is spring element.It is further preferred that the spring element can be made of qin steel wire.

The containment member 12 of base assembly 3 is configured to sealed base component 3, and can ensure the accurate of guide post 4 Positioning.Preferably, containment member 12 is made of glass.

In addition, referring to Fig. 1 and Fig. 2, closed type protector 1 can also optionally include disk support component 10 and fever member Part 11, disk 6 are fixed on the first surface of disk support component 10, and heater element 11 is fixed on disk support member On the second surface opposite with the first surface of part 10.As the add ons for realizing excess current protective function, hair Thermal element 11 is optional accessory.Preferably, heater element 11 can be heating wire or heating board.Thereby, it is possible to protect closed type Shield device 1 bears bigger short circuit current and passes through.

Fig. 3 A-3E is the schematic diagram for the assembling process of closed type protector according to the present utility model.Firstly, as schemed Shown in 3A, base assembly 3, disk 6 and optional disk support component 10 and heater element 11 (referring to fig. 2) are assembled in one It rises to obtain pedestal-disc stack 100.Then, as shown in Figure 3B, by film resistor component 8 and holding member 9 (referring to fig. 2) It fits together to obtain film resistor component 200.

Next, as shown in Figure 3 C, pedestal-disc stack 100 and film resistor component 200 are fitted together to obtain Pedestal-disk-film resistor component 300.In addition, as shown in Figure 3D, preparing shell-stationary contact component 400, the shell-is quiet Contact assembly 400 includes shell 2 and the stationary contact 5 (referring to fig. 2) being fixedly provided on shell 2.

Finally, as shown in FIGURE 3 E, pedestal-disk-film resistor component 300 and shell-stationary contact component 400 are assembled in Together to obtain final protector finished product 500.The assembling process of entire closed type protector is completed as a result,.

Fig. 4 A-4B is the working principle explanatory diagram of closed type protector according to the present utility model.The utility model it is close Envelope type protector 1 extends the time for keeping the operating circuit of motor to disconnect by protector by the way that film resistor component is added, from And the self-retaining function of protector can be realized to a certain extent, basic functional principle is as shown in figs. 4 a-4b.Referring to figure 4A-4B, in the operating circuit of motor, including AC power source AC, motor M and closed type according to the present utility model protection Device.Closed type protector includes the switch D being made of movable contact and stationary contact and the resistor being made of film resistor component R。

As shown in Figure 4 A, when motor operates normally, closed type protector 1 is in normal operating conditions, at this time protector 1 The default of disk 6 be it is normally closed, stationary contact 5 and movable contact 7 remain closed, and contact resistance is only several milliohms to more than ten milliohms, institute It is short-circuited with resistor R, whole system works normally.

As shown in Figure 4 B, when closed type protector 1 encounters the excessively high exception of short circuit, current overload or environment temperature When operating condition, disk 6 makes protector 1 carry out protection operation due to being bent rapidly by thermogenetic internal stress, so that stationary contact 5 and dynamic Contact 7 is separated to cut off the operating circuit of motor.At this point, the resistor R access circuit being made of film resistor component, starts Fever.Since the resistance value of resistor R is bigger, generally tens k Ω, therefore the electric current in entire circuit is limited in mA rank, Resistor R can generate heat in the range of its power allows and significantly extend the turnaround time of disk.Until the disk 6 of protector 1 It cools to lower than after reset temperature, disk 6 can just re-close, and resistor R is shorted out, and restore system again just Often work.In this way, the protector 1 of the utility model just extends the time for keeping the operating circuit of motor to disconnect by protector, To realize a degree of self-retaining function, therefore the action frequency of protector 1 can be reduced, to significantly extend The service life of protector 1.

On the other hand, the utility model additionally provides a kind of motor, can install and use on the motor and is above-mentioned The closed type protector 1 of type.Closed type protector 1 fits together in which should be close to the winding of motor with motor, so as to standard The really temperature change of perception machine winding.

In addition, it will be appreciated by those skilled in the art that closed type protector disclosed in the utility model can be suitable for Various types of motor.

Although describing the disclosure referring to exemplary embodiment, it should be appreciated to those skilled in the art that at this Do not departed from matter the exemplary embodiment of the disclosure can be carried out in the case where spirit and scope of the present disclosure a variety of modifications and Modification.Therefore, all modifications and variations are all contained in the protection scope for the disclosure being defined by the following claims.This public affairs The protection scope opened is defined by the appended claims, and the equivalent program of these claims is also included.

Claims (10)

1. a kind of closed type protector for motor, which is characterized in that the closed type protector includes:

Shell is fixedly provided with stationary contact on the housing；

Base assembly, the shell and the base assembly are hermetically fitted together to limit inner space；

The disk being encapsulated in the inner space is equipped with the movable contact that can be moved, the disk construction on the disk At to enable the movable contact to move between on position and off position, in the on-position, the movable contact Be in contact with each other with the stationary contact so that the closed type protector is connected, in the open position, the movable contact with it is described Stationary contact separates so that the closed type protector disconnects；And

It is encapsulated in the inner space and can be suitable for the film resistor component of inert gas environment, the film resistor group Part, which is configured to extend after the movable contact moves to the open position from the on-position, makes the movable contact Time in the open position.

2. closed type protector according to claim 1, which is characterized in that the disk be configured to motor just So that the movable contact is in the on-position being in contact with each other with the stationary contact in normal operating condition, and is protected in the closed type Shield device because motor unusual service condition occurs carry out protection operation when make described in the movable contact is in and separates with the stationary contact Open position.

3. closed type protector according to claim 2, which is characterized in that the base assembly include pedestal, guide post and Containment member, the film resistor component include film resistor component and holding member, and the containment member is configured to close The base assembly is sealed, the holding member is configured to fix the film resistor component and keeps the film resistor group Part is contacted with the guide post.

4. closed type protector according to claim 3, which is characterized in that the film resistor component includes a film Resistive elements and two holding members, the first end of each holding member are socketed on film resistor component, and each guarantor The second end for holding component is welded on the base assembly.

5. closed type protector according to claim 4, which is characterized in that the holding member is spring element.

6. closed type protector according to claim 5, which is characterized in that the spring element is made of qin steel wire.

7. according to claim 1 to closed type protector described in any one in 6, which is characterized in that the shell and bottom Holder assembly is assembled by welding.

8. according to claim 1 to closed type protector described in any one in 6, which is characterized in that the closed type is protected Protecting device further includes disk support component and heater element, and the disk is fixed on the first surface of the disk support component On, the heater element is fixed on the second surface opposite with the first surface of the disk support component.

9. according to closed type protector described in any one in claim 3 to 6, which is characterized in that the film resistor Component is column resistance or Chip-R.

10. a kind of motor, which is characterized in that can be installed on the motor and using according to claim 1 to any in 9 Closed type protector described in one.