CN105908318A

CN105908318A - Godet unit with induction coil arrangement structure for heating

Info

Publication number: CN105908318A
Application number: CN201610091144.1A
Authority: CN
Inventors: U·巴德尔
Original assignee: RITTER ELEKTRONIK GmbH
Current assignee: RITTER ELEKTRONIK GmbH
Priority date: 2015-02-19
Filing date: 2016-02-18
Publication date: 2016-08-31
Anticipated expiration: 2036-02-18
Also published as: CH710793B1; DE102015108635A1; CN105908318B; CH710793A2

Abstract

The invention relates to a godet unit (1) with a cylindrical heatable godet cover (2) made of a ferromagnetic and electrically conductive material, which has a thickness (D) and an outer circumferential surface (21) for heating and guiding at least one thread (14) or band (15); the godet cover surrounds an inner space (22) in which a rotatable drive shaft (5) is arranged in the center; the godet jacket (2) is fixed on the drive shaft through an outer end face (7); the godet unit has a induction coil arrangement structure (3) that is fixed in position between the drive shaft (5) and the godet jacket (2) and on a coil rack (4), wherein the coil rack (4) is made of non-electrically conductive and non-ferromagnetic material, and optically made of glass; and the coil rack (4) is concentric with the drive shaft (5) and the galette shell (2); and substantially no ferromagnetic material is present in the interior space (22).

Description

There is the Galette unit for the induction coil layout structure heated

Technical field

The present invention relates to a kind of Galette unit of roller shell with cylinder, this roller shell can be by means of Fixed induction coil layout structure heats.

Background technology

Heated godet is used for heating in field of textile industry and guides at least one threads Or band.Roller shell generally rotates with the peripheral speed of up to 8000 meters [m/min] per minute.In existing skill In art, on the one hand the known various different systems for heating roller shell, wherein can realize from outside adding Heat, but the most preferably by being positioned at the parts realization heating within roller shell.Document DE 195 40 905 A1 describe a kind of such arrangement, in this arrangement, is positioned at roller shell The fixed induction coil in portion can generate electric current, this electric current heating roller shell in roller shell.This Invention is derived from this arrangement, and this arrangement also describes, how can the roller of spinning in the future The measured temperature of set is outwards transferred to fixed device.

Have a lot of other for inductively heating roller shell by being arranged in the induction coil within roller shell Form of implementation.The common ground of all these forms of implementation is, applies ferromagnetic material the most always Material, the most stacked plate or ferritic form, in order to conduct in roller shell as fully as possible The magnetic flux of induction coil.This situation needs to expend substantial amounts of material, and causes induction type to add thermojunction Structure is the heaviest and expensive.But it is required that this way is counted as up to now, in order to avoids Other parts in heat driven axle and Galette unit, and as efficiently as possible roller shell is realized heating.

Summary of the invention

It is an object of the invention to, weight more lightly designs, with cost, the sense being positioned in roller shell inside lower Answer formula heating arrangement, and and increase loss indistinctively.

It is used for realizing above-mentioned purpose according to the Galette unit described in independent claims 1.Can be independent Application or with the favourable design of technical significant mode combination application at dependent claims Middle explanation.

According to Galette unit of the present invention have by ferromagnetic and conduction material make, Cylindrical heated roller shell, this roller shell has thickness and for heating and guiding at least one root length Silk or the periphery of band, and this roller shell surrounds an inner chamber, has can revolve in center arrangement in this inner chamber The drive shaft turned, roller shell is fastened in this drive shaft by outer side, and this Galette unit also has Induction coil layout structure on bobbin, between drive shaft and roller shell, fixed, Wherein, this bobbin is made up of nonconducting and nonferromagnetic material, and bobbin and drive shaft With roller shell arranged concentric, wherein, except drive shaft be probably ferromagnetic in addition to, in inner space It is substantially absent from ferromagnetic material.

Coil arrangement according to the present invention is that so-called " centreless " or " iron-core-free " is arranged Structure, that is, there is not the built-in fitting of inside conduct magnetic field at roller shell.Surprisingly, The built-in fitting omitting conduct magnetic field can't cause loss to significantly increase, and is also not result in other component It is heated in a larger amount than roller shell.In fact according to the invention, it is possible to use the coil being made of plastics Frame, the most whole induction coil layout structure ratio has the least according to the bobbin of prior art Weight.But surprisingly, glass is also proved to be applicable material.Glass tube can be with cost Manufacture cheaply, and than most of working of plastics, there is more preferable heat resistance, even if thus glass is non- Often can also apply inside godet at a temperature of height.Apply following category of glass in an advantageous manner Type, this kind of glass is modified and is specifically designed at such as 100 DEG C to 200 DEG C or even 300 DEG C Apply under high temperature.So far glass is not also considered as material parts in godet inside, this Being because those skilled in the art to think, the different thermal coefficient of expansion of metal and glass is disadvantageous. But bobbin is the most only fixed in side or energy elastic clamping, thus bobbin is in the axial direction Can expand independent of miscellaneous part.And bobbin only need to support coil, owing to coil has had Balance, thus coil self does not produce extra load to glass tube in the case of high-revolving. It addition, the cost of the substantially cylindrical bobbin being made up of glass is stacked significantly less than using The material cost of transformer silicon steel sheet and assembly cost.From this, do not using conduct magnetic field Device in the case of, be even capable of the highly uniform sensing heating to roller shell.According to this Bright being preferably used following induction coil layout structure, this induction coil layout structure has at least one Be concentrically surrounding drive shaft extend coil, this coil can with there is prespecified frequency and/or electricity The AC power of intensity of flow connects.

The most from the prior art known cylindrical coil basic arrangement and by AC power Power supply.Cause inductivity to be slightly reduced although omitting ferromagnetic coil core, but this can pass through It is appropriately modified AC power or is compensated by improving frequency.Therefore the present invention only need to be known Current supply device and control to carry out small change on device.

Loss can be made in the case where there to be maintained at the most small degree, i.e. work as induction coil layout Structure is spaced apart with roller shell by outer annular gap, and induction coil layout structure is by between inner annular Gap is spaced apart with drive shaft, when this outer annular gap is significantly less than internal annular gap.Thus, line Magnetic density within Quan is relatively small, and the magnetic field concentration of the outside of coil arrangement is in roller shell. The size of internal annular gap is preferably at least twice in outer annular gap, especially outer annular More than five times of the size in gap.

In currently preferred form of implementation, drive shaft at least has electric conductivity in the inner chamber of roller shell Good coating, coating the most made of aluminum.

This point such as can have the aluminum pipe realization of 0.1 3mm thickness, this aluminum pipe cover by installation On the driving shaft.Because drive shaft is generally made up of the material conducting electricity, the most even by ferromagnetic Material is made, so magnetic field also produces electric current in drive shaft and adds in the inside of coil arrangement This drive shaft of heat.Although owing to the such situation of the size of internal annular gap is slight journey Degree, but the most undesirable.The coating (it such as can be realized by aluminum pipe or copper pipe) of good conductivity The vortex flow on surface is formed, this vortex flow magnetic field to producing this vortex flow due to small resistance Have the opposite effect, and therefore by this magnetic field as excluded the region of drive shaft.Although this surface can become Heat, but it is intended to fainter much to the heating of whole drive shaft than in the case of otherwise.

According to the present invention, coil arrangement is designed to realize its purpose, in this coil or institute State the dynamic alternating current of these coil midstreams and produce alternating magnetic field, this alternating magnetic field enter in roller shell and There generates electric current, and this induced current heats this roller shell.

According to the present invention, the most all known coil arrangements for this purpose can With thering is no ferrimagnet in the inside of roller shell use, but cylindrical coil or multiple each other before and after The cylindrical coil successively arranged is particularly suited for this purpose.

Due to the simple structure of bobbin, present disclosure additionally applies for having up to 1500mm or or even Longer axial length, long especially godet.Diametrically outside, this coil arrangement is also Not restriction, thus overall diameter fully achieve 500mm and more than.

As in principle by known in the art, in the present invention, temperature adjusting can also be by by means of extremely Temperature in a few temperature sensor measurement godet realizes, wherein, and this temperature sensor and use Regulation device in the AC power of regulation and control induction coil layout structure is connected.

It should also be noted that in currently preferred form of implementation, roller shell has been connected with drive shaft The outer side of the godet come is made up of ferromagnetic material.The most additionally advantageously heating hub portion.Simultaneously this Stray magnetic field is stoped to occur in the outside of Galette unit.

Accompanying drawing explanation

A kind of embodiment of the present invention diagrammatically described below with respect to accompanying drawing, but the present invention not office It is limited to this embodiment.Accompanying drawing illustrates:

Fig. 1 illustrates the schematic vertical sectional view of the Galette unit according to the present invention,

Fig. 2 illustrates the sectional elevation cut open along Fig. 1 straight line II-II,

Fig. 3 is shown in and moves towards according to the typical magnetic field in the Galette unit of Fig. 1,

Fig. 4 illustrates according to the typical vortex flow in the Galette unit according to the present invention of Fig. 2, and

Fig. 5 is shown as the fastening structure of the glass tube of bobbin.

Reference numerals list:

1 Galette unit

2 roller shells

3 induction coils

4 bobbins, glass tube

5 drive shafts

6 coating/aluminum pipe

7 outer sides

8 Current-delivery devices

9 AC powers

10 temperature sensors

11 signal transmission systems

12 control device

13 supporting structures

14 bearings

15 long filaments

16 bands

17 pull bars

18 flanged plates

19 grooves with silicones lining

20 clamp nuts

The outer peripheral face of 21 roller shells

The inner chamber of 22 roller shells

The thickness of D roller shell

The thickness of d coating/aluminum pipe

R1 internal annular gap

R2 outer annular gap

The axial length of L roller shell

The overall diameter of A roller shell

Induced current in I1 aluminum pipe

Induced current in I2 roller shell

Electric current in I3 induction coil layout structure

M magnetic field

Detailed description of the invention

Fig. 1 and Fig. 2 schematically shows the godet according to the present invention in longitudinal section and sectional elevation The structure chart of the local of unit 1, this Galette unit has the roller shell 2 that thickness is D.This roller shell 2 Being connected with drive shaft 5 on side 7 outside, this drive shaft extends with one heart in the inner chamber 22 of roller shell 2. Drive shaft 5 is at least surrounded in the inside of inner chamber 22 by aluminum pipe 6, and wherein, aluminum pipe 6 has 0.1 3mm Layer thickness d.Same and roller shell 2 is disposed with bobbin 4, preferably glass with one heart in inner chamber 22 Glass pipe, the induction coil layout structure 3 of this bobbin supports cylindrical, especially with continuous print cylinder The form of shape coil.Induction coil layout structure 3 is by between outside annular gap R2 and roller shell 2 Separate, and spaced apart with drive shaft 5 by internal annular gap R1.At this for internal ring The size of shape gap R1, all counts the layer thickness of bobbin 4 and the thickness of aluminum pipe 6.Weight , bobbin 4 is not made up of ferromagnetic material, and is nonconducting, and If desired in addition to drive shaft 5, inner chamber 22 does not the most comprise ferromagnetic material.Therefore this is real It it is the coil arrangement of centreless or iron-core-free on border.Electric current is passed through in the supply of electric power of induction coil 3 Conveying device 8 realizes, and this Current-delivery devices is powered by AC power 9.When hope regulates and controls roller shell 2 Temperature time (majority of case is all such), it is possible to use known regulation and control from the prior art System.This such as can be arranged in roller shell 2 at least one temperature sensor 10, this TEMP Device is connected with regulation device 12 by contactless signal transmission system 11, and the regulation and control of this regulation device are handed over Stream power supply 9.Owing to signal line 11 must be from the device transmission measurement value rotated, so this holding wire Road can extend and cause sliding contact by drive shaft, or can also use wireless connection.Whole Galette unit 1 be normally fastened on supporting structure 13.Drive shaft 5 can be the tightest at this Gu in applicable bearing 14, and bobbin 4 is fixedly mounted on supporting structure 13 in side. By reducing the weight of bobbin 4 and induction coil layout structure 3 and simplifying bobbin 4 and the line of induction The structure of circle arrangement 3, it is suitable for have big axial length L, such as 1500mm Or the Galette unit 1 of longer axial length, it is suitable for little or big, up to 500 The order of magnitude of mm and above overall diameter A.Roller shell 2 has outer peripheral face 21, and this outer peripheral face is applicable to Heat and guide at least one threads 15 or band 16.Generally also on roller shell 2 guide plurality of threads and/ Or multiple-turns wound ground guides a threads.

Fig. 3 and Fig. 4 explanation is according to the characteristic with electricity of the magnetic of the Galette unit 1 of the present invention.Principle On form typical internal magnetic field and external magnetic field around cylindrical induction coil layout structure 3, its In, this magnetic field in outside concentrates on roller shell 2, and in inside due to aluminum pipe 6 effect major part It is excluded from drive shaft 5.This causes in Fig. 4 by the electricity in annular and the aluminum pipe 6 that represents of arrow Electric current I3 in stream I1, roller shell 2, the electric current I3 in induction coil layout structure 3, certainly these electricity Flow along with the magnetic field of change the most correspondingly changes its direction.The electric current I3 of flowing in induction coil 3 In roller shell 2, produce the ring current I2 flowed in reverse direction, and produce same along anti-in aluminum pipe 4 The weak electric current I1 of direction flowing.Therefore the overwhelming majority of magnetic field energy may be used for heating roller shell 2.

For fastening as the preferred scheme of the glass tube of bobbin 4 in fig. 5 it is shown that the program It is that glass tube 4 is fastened to supporting structure 13 by pull bar 17 and is presented axially in supporting structure Between the flanged plate 18 on 13 opposites.On the one hand the longitudinal dilatation of glass tube can pass through the vertical of pull bar 17 To expansion compensation, and embedded in the centre mount on flanged plate by the end of glass tube 4 or have resistance to Mode in the groove 19 of the silicones lining of heat compensates.This fixed form also assures that centering simultaneously, Silicones can compensate diameter difference during thermal expansion.The pull bar 17 fixed by nut 20 and tightened is same Advantageously by nonconducting and non-magnetic material manufacture.

Therefore the present invention is suitably positioned within roller shell, conduct magnetic field as having of being applied so far The replacement scheme of the induction type godet heater of built-in fitting.The bobbin ratio being made of plastics is so far Known to have that the arrangement cost of stacked ferromagnetic plate is lower and weight is lighter, thus have big Axial length or the Galette unit of big diameter be particularly suitable for being equipped with and add hot charging according to the present invention Put.

Claims

1. a Galette unit (1), has the circle being made up of ferromagnetic and conduction material Roller shell (2) cylindricality, heatable, this roller shell have thickness (D) and have for heating and Guiding at least one threads (14) or the outer peripheral face (21) of band (15), this roller shell surrounds inner chamber (22), Having rotatable drive shaft (5) in center arrangement in this inner chamber, roller shell (2) passes through outer side (7) Be fastened in this drive shaft, described Galette unit have on bobbin (4), be positioned at drive shaft (5) the fixed induction coil layout structure (3) and between roller shell (2), wherein, coil Frame (4) is made up of nonconducting and nonferromagnetic material, and with drive shaft (5) and roller shell (2) Arranged concentric, wherein, is substantially absent from ferromagnetic material in inner chamber (22).

Galette unit the most according to claim 1 (1), it is characterised in that the line of induction Circle arrangement (3) has at least one and is concentrically surrounding the coil (3) that drive shaft (5) extends, This coil can with can the AC power (9) of prespecified frequency be connected, wherein, bobbin (4) is excellent Choosing is made up of glass.

Galette unit the most according to claim 1 and 2 (1), it is characterised in that sense Answer coil arrangement (3) spaced apart with roller shell (2) by outer annular gap (R2), and lead to Cross internal annular gap (R1) spaced apart with drive shaft (5), wherein, internal annular gap (R1) More than outer annular gap (R2), the size of internal annular gap is preferably outer annular gap More than twice, especially more than five times.

4., according to Galette unit in any one of the preceding claims wherein (1), its feature exists In, drive shaft (5) at least have in the inner chamber of roller shell (2) (22) good conductivity coating (6), described coating is especially made of aluminum or copper.

Galette unit the most according to claim 4 (1), it is characterised in that described in cover Layer (6) be thickness (d) be the aluminum pipe of 0.1mm to 3mm.

6., according to Galette unit in any one of the preceding claims wherein (1), its feature exists In, coil arrangement (3) is designed to, at the alternating current that this coil or these coil midstreams described are dynamic The raw alternating magnetic field of miscarriage, this alternating magnetic field enters and generates vortex flow in roller shell (2) and in roller shell, This vortex flow heating roller shell (2).

7., according to Galette unit in any one of the preceding claims wherein (1), its feature exists In, roller shell (2) has the axial length (L) of 100mm to 1500mm.

8., according to Galette unit in any one of the preceding claims wherein (1), its feature exists In, roller shell (2) has the overall diameter (A) of 100mm to 500mm.

9., according to Galette unit in any one of the preceding claims wherein (1), its feature exists In, at least one temperature sensor (10) is arranged in roller shell (2) or on roller shell (2), this temperature Spend sensor and be used for regulating and controlling the regulation device of the AC power (9) of induction coil layout structure (3) (12) connect.

10., according to Galette unit in any one of the preceding claims wherein (1), its feature exists In, outer side (7) are made up of ferrimagnet, and have the thickness (D) being similar to roller shell (2) Thickness.