CN103314422A

CN103314422A - Tap changer

Info

Publication number: CN103314422A
Application number: CN2012800058251A
Authority: CN
Inventors: C·伯格尔; T·霍特纳; M·雅塔; P·莱德雷尔; S·雷科普夫; K·施莱普; R·施特伦佩尔; J·尼斯纳
Original assignee: Maschinenfabrik Reinhausen GmbH
Current assignee: Maschinenfabrik Reinhausen GmbH; Scheubeck GmbH and Co
Priority date: 2011-01-20
Filing date: 2012-01-04
Publication date: 2013-09-18
Anticipated expiration: 2032-01-04
Also published as: EP2666171A1; BR112013016129A2; CN103314422B; WO2012097958A1

Abstract

The invention relates to a tap changer of the load switch type for switching between winding taps of a step transformer without interruption, wherein fixed tap contacts (8) are arranged at separate levels in the wall of a cylinder (7) made of insulating material for each phase to be selected, which fixed tap contacts (8) can be connected by movable contacts (3, 4, 5) arranged on a contact carrier (2), the movable contacts acting as transition contacts (3, 4) or switching contact (5). The transition contacts (3, 4) and the switching contact (5) are designed as transition contact rollers (3, 4) and a switching contact roller (5), wherein the transition contact rollers (3, 4) are supported on the contact carrier in a first horizontal plane and the switching contact roller (5) is supported on the contact carrier in an additional horizontal plane. The fixed tap contacts (8) extend vertically to such an extent that they can be connected by the contact rollers (3, 4, 5) in both planes.

Description

Shunting switch

Technical field

The present invention relates to a kind of shunting switch of the load selector type between the tapping of adjustable variable-pressure device, interruptedly not changing.

Background technology

The shunting switch of this load selector type is known by DE3207894A1.At this, each fixing minute contact point is arranged on the circular arc on the cylindrical oil tank inwall; Thereunder or above it be provided with the load leads that are configured to continuous contact track so that as the corresponding contact roller of armature contact optionally with each minute contact point be connected with continuous contact track.In this known shunting switch, a contact bridge is set, optionally connect arbitrary minute contact point and load leads by this contact bridge.Contact bridge is touch roll and lower touch roll on this has, and described two touch rolls are bearing in respectively in the arm of contact bridge support and by flexible wire connection each other in an electrically conductive.Be provided with steel core in this flexible wire, it is fixedly connected with two touch rolls.The contact bridge support is mobile by the rotatable driving tube stepping ground that is bearing in the fuel tank.As mentioned above, optionally always there is a fixing minute contact point to be connected with the continuous contact track that consists of load leads at this.In order to make touch roll roll on better fixed contact and also to roll down better fixed contact, fixed contact is provided with rake.The advantage of described flexible wire is, also can compensate little, inevitable tolerance in the mill between fixed contact and continuous contact track.

DE3407332A1 illustrates a kind of similar device, and a bolt by contact holder guides the conductive contact roller therein, and this conductive contact roller also abuts in all the time on the contact ring and by twisted wire and is electrically connected with the touch roll of main double-throw contact.

At last, DE19821775C1 discloses the shunting switch of another kind of load selector type, is therein the fixing minute contact point of each arranging in an independent plane in the wall of insulating material cylinder respectively mutually of will changing.Described fixing minute contact point also can be by corresponding contacting at this, the contact of described correspondence along continuous straight runs on contact holder is arranged side by side, so that always there is a described contact to arrive new fixing minute contact point when contact holder rotates before current fixing minute contact point is left in another contact.As double-throw contact, another contact is as resistance contact point at this for contact, and this resistance contact point is electrically connected with at least one switching resistance and only temporarily is electrically connected with the fixing contact point foundation that divides in the wall in transition period of reality.

The shunting switch of known load selector type has been proved to be effectively in a large number, but has various shortcomings.The insulating material cylinder that is provided with on the one hand fixed contact needs relatively large minimum diameter, in order to make the different armature contacts of horizontal Tile setting connect corresponding fixed contact with the transfer sequence of regulation.On the other hand, connect load leads conduction flexible connecting device machinery or electric aspect all expend.

Summary of the invention

Task of the present invention is to provide the shunting switch of a kind of special price load selector type cheap and simple in structure, and this shunting switch allows fuel tank to have small diameter, have a simple contact making device and can omit the flexible connecting device of described conduction in addition.

The shunting switch of the feature of this task by having claim 1 is solved.Dependent claims relates to the particularly advantageous expansion scheme of the present invention.

The present invention based on basic conception be, armature contact be configured to the simple and cheap especially touch roll of structure and in two horizontal planes, arrange in mutually at each with staggering.In addition, basic inventive concept is, same simple corresponding fixed contact is set, and it can be connected and can control simply rolling process in addition by the touch roll on two planes is common in mutually at each.At last, in favourable scheme, the collecting brush of the slip that acts on the corresponding contact roller by special tectonic makes that the flexible connecting device of disclosed conduction becomes unnecessary in the prior art in category of the present invention.

Description of drawings

The below is by the exemplary detailed description the present invention of accompanying drawing.Accompanying drawing is as follows:

Fig. 1 be shunting switch according to armature contact device of the present invention;

Fig. 2 is corresponding fixed contact device;

Fig. 3 is the acting in conjunction of armature contact device and fixed contact device;

Fig. 4 is the touch roll of independent armature contact device and the member that surrounds this touch roll;

Fig. 5 is independent fixed contact.

Embodiment

Fig. 1 illustrates the perspective schematic view according to the armature contact device of shunting switch of the present invention.In central authorities, rotatable driving shaft 1 pass shunting switch at this unshowned fuel tank, contact holder 2 for example is fixed on the described driving shaft by bolt or by the clamping flange.Device shown here relates to the phase that will change.(top) arranges two

resistance touch rolls

3,4 in the first horizontal plane, and it has specific radial distance to each other.Thereunder, namely arrange one and vertically see the switching touch roll 5 that is arranged on

resistance touch roll

3,4 centres in another horizontal plane, this switching touch roll guides continuous current in a known way in stable operation.Below more, in the 3rd horizontal plane, be provided with a conductive rollers 6.All touch rolls can be bearing in rotatably independently of one another on the contact holder 2 and can be together along with contact holder rotates when driving shaft 1 rotation.

Fig. 2 illustrates the fixed contact device according to shunting switch of the present invention.In the wall of the insulating material cylinder 7 that only simply illustrates, contact 8 is set, wherein here only a contact indicate Reference numeral.Distance between each contact is corresponding to the calibration of shunting switch, namely from a fixed contact and the handoff angle when therefore being transformed into the adjacent tapping that next is higher or next is lower from a tapping.The contact 8 that is used for each phase that will change is arranged on a horizontal plane.The vertical development length of contact makes it not only can but also can be switched touch roll by the correspondence of corresponding phase by the corresponding resistance touch roll of corresponding phase and connects.Below contact, the bus-bar 9 of a continuous conduction is set in another horizontal plane, it is in known manner corresponding to the conductive rollers 6 of corresponding phase.

Fig. 3 illustrates the acting in conjunction of described member.Can see, be arranged on resistance touch roll on the contact holder 2 (in this view only a resistance touch roll 3 as seen) and thereunder and stagger the switching touch roll 5(that arranges its illustrate at this with being broken away) the common contact 8(that connects in the wall that is fixed on insulating material cylinder 7 is fixed contact) and top or bottom.At this corresponding collecting brush 13 is shown also in addition, it also will be described in detail below.Collecting brush is used for corresponding touch roll being electrically connected to other member and finally being electrically connected at this unshowned bus-bar.Collecting brush 13 is forced on the different touch rolls by spring 17 respectively.Touch roll itself is by any electric conducting material, make such as red copper, brass or steel.Touch roll also can have specific coatings (such as silver), is used for preventing scaling loss or excessive wear.

Fig. 4 illustrates separately a touch roll and belongs to its member.Touch roll 10 shown here not only is used as the resistance touch roll but also be used as the switching touch roll in particularly advantageous mode.As mentioned above, this touch roll is made by electric conducting material and is configured to single type at this, but and nonessential so.This touch roll has actual contact area 11 and space part 12 and lower space part 12a on the contact area side has in the centre.On each space part side already mentioned collecting brush 13 is set, it has upper sliding contact 14 and lower slider contact 15.Upper sliding contact 14 slides at upper space part 12 all the time, slides at lower space part 12a all the time in lower slider contact 15.Collecting brush 13 is also made by electric conducting material fully.Collecting brush always is directed in the swing arm 16 at swing frame in other words with touch roll 10, and swing frame in other words swing arm is hinged on the contact holder that is not shown on this rotationally.The spring 17 of having carried is on the space part 12 that all the

time sliding contact

14,15 of collecting brush is pressed onto touch roll 10 between swing frame 16 and the collecting brush 13,12a.At this cable splicing 24 is shown simply also, is connected with electric connecting wire at this cable splicing, described electric connecting wire is set up being electrically connected of other member of corresponding contact roller and shunting switch.

Fig. 5 illustrates separately a fixed contact therefor 8.The contact 8 of this conduction have two separate towards the contact area of touch roll as integrated part: the resistance contact point 18 of conduction is set in upper area, the also double-throw contact 19 of conduction is set in lower area.The resistance contact point 18 on top can correspondingly pass through the

resistance touch roll

3 and 4 of top as shown in Figure 1 and connect.Double-throw contact 19 can be connected by corresponding switching touch roll same shown in Figure 15.The framework 20 that contact 8 is made by insulating material surrounds.Between resistance contact point 18 and double-throw contact 19 space part 21 is set, namely not existing there can be by the contact of touch roll connection.Framework 20 has guiding profile 22a and lower guiding profile 22b in the both sides of resistance contact point 18, be used for boot-strap resistor touch roll 3,4.Thereunder, framework has guiding profile 23a and lower guiding profile 23b in the both sides of double-throw contact 19, be used for the corresponding touch roll 5 that switches of guiding.Guiding profile 22a has respectively identical geometric profile with 22b or 23a with 23b.Yet the geometric profile of guiding

profile

22a and 22b is different from the geometric profile of guiding profile 23a and 23b.Control targetedly corresponding touch roll and therefore control transfer process by each guiding profile.

Contact 8 is by any electric conducting material, make such as red copper, brass or steel.Contact also can have specific coatings (such as silver), is used for preventing scaling loss or excessive wear.In a word, described contact making device according to shunting switch of the present invention can be in the situation that insulating material cylinder diameter be less of will be each resistance touch roll 3 that arranges, 4 and switch touch roll 5 and combine with the conductive rollers 6 that arranges and connect corresponding fixed contact therefor 8 in the 3rd horizontal plane in two planes simple and reliablely.Although there is different horizontal planes, always only need single contact 8, this contact is also guaranteed actual transfer sequence, is the control that rolls on and again roll down of corresponding contact roller by described guiding profile in addition.

Claims

1. shunting switch that is used for the load selector type between the tapping of adjustable variable-pressure device, interruptedly do not change, wherein, be the fixing minute contact point of each in the wall of insulating material cylinder, in an independent plane, arranging respectively mutually of will changing; The fixing minute contact point of the phase that each will be changed can be connected by armature contact; At least one armature contact is as double-throw contact, and two other armature contacts are as the resistance contact point that is electrically connected with at least one switching resistance; Armature contact is arranged on the contact holder; And contact holder is fixed on the driving shaft that medially extends through shunting switch and can rotates in the horizontal direction with this driving shaft when conversion,

It is characterized in that, resistance contact point and double-throw contact all are configured to touch roll, are resistance touch roll (3,4) and switching touch roll (5), wherein, resistance touch roll (3,4) is bearing in the first horizontal plane on the contact holder (2), switches touch roll (5) and is bearing on the contact holder in another horizontal plane; And fixing tap contact configuration is contact (8), the vertical development length that it has so that its can distinguish not only by resistance touch roll (3,4) but also be switched touch roll (5) connection.

2. shunting switch according to claim 1, it is characterized in that, described two resistance touch rolls (3,4) have specific radial distance to each other, and switch touch roll (5) and vertically see in another horizontal plane and be arranged in the middle of each resistance touch roll (3,4).

3. shunting switch according to claim 1 and 2, it is characterized in that, described two resistance touch rolls (3,4) and switch touch roll (5) and made by electric conducting material and have a radial gap section (12,12a) in single type ground respectively, the sliding contact (14,15) of collecting brush (13) of conduction slides at space part respectively, so that collecting brush (13) is set up being electrically connected of other member of corresponding touch roll (3,4,5) and shunting switch.

4. shunting switch according to claim 3 is characterized in that, each touch roll (3,4,5) and the collecting brush (13) that matches are separately positioned on the spring-loaded swing frame (16); And swing frame (16) is hinged on the contact holder (2) rotationally.

5. according to claim 1 to one of 4 described shunting switchs, it is characterized in that, each contact (8) have two separate towards the contact area of touch roll (3,4,5) as integrated part: i.e. the resistance contact point of the conduction in the first horizontal plane (18) and the also double-throw contact (19) of conduction in the second horizontal plane; And according to switching position, resistance contact point (18) can be connected by resistance touch roll (3,4), and double-throw contact (19) can be switched touch roll (5) connection.

6. shunting switch according to claim 5 is characterized in that, the framework (20) that each contact (8) is made by insulating material surrounds; Described framework (20) has in the both sides of resistance contact point (18) for the upper guiding profile (22a) of boot-strap resistor touch roll (3,4) and lower guiding profile (22b); And described framework (20) has in the both sides of double-throw contact (19) for guiding the other upper guiding profile (23a) of switching touch roll (5) and other lower guiding profile (23b).

7. shunting switch according to claim 6 is characterized in that, the geometry of guiding profile (22a, 22b) is identical, and the geometry of guiding profile in addition (23a, 23b) is also identical; And, the identical geometric profile of guiding profile (22a, 22b) is different from the geometric profile of other guiding profile (23a, 23b), thus controlling resistance touch roll (3,4) and switch touch roll (5) and therefore control the transfer process of shunting switch targetedly.