LU504359B1 - sheet metal package - Google Patents

Abstract

The invention relates to a method for producing a laminated core (3) comprising a plurality of individual sheets (4, 104), wherein the individual sheets (4, 104) are materially bonded to one another by an anaerobic adhesive (105) such that at least one cooling channel (10A...17A, 10B...17B), preferably a cooling circuit system, is sealed in a media-tight manner.

Description

Description

sheet metal package

In the case of frameless engines, cooling pipes are usually used for the cooling circuit of the water cooling system. The thermal connection of the cooling pipes to the laminated core is a major

Challenge, as the cooling pipes must have clearance for assembly, which means that they are surrounded by an insulating layer of air and thus poorly dissipate heat from the

The cooling pipes are usually made of stainless steel or plastic.

The invention is based on the object of improving heat dissipation.

The solution of the problem is achieved by claim 1, i.e. a

Method for producing a laminated core, comprising a

A plurality of individual sheets, wherein the individual sheets are bonded together by an anaerobic adhesive in such a way that at least one cooling channel, preferably a cooling circuit system, is sealed in a media-tight manner.

This is advantageously achieved by flooding the cooling channel, preferably the cooling circuit system, with the adhesive.

The adhesive is, for example, an anaerobic hardening securing adhesive, which is preferably high-strength. In the liquid

State, especially before hardening, the

Adhesive advantageously has the following physical properties:

Chemical characterization: Methacrylic acid ester

Curing system: Anaerobic curing;

Viscosity at 25°C: between 50 and 60 mPa*s

Density at 25°C. approx. 1.05 g/cm?

At a temperature of approx. 23°C, the adhesive cures in such a way that it is hand-tight after five to ten minutes and functional after approx. 30 to 40 minutes.

When cured, a temperature range of -60 °C up to 180 °C is possible. A compressive shear strength according to DIN EN ISO 10123 is preferably at least 28

N/mm? ,

The adhesive hardens quickly, and this can also be accelerated with an activator. The adhesive is resistant to shear stress and dynamic loading.

Due to its very low viscosity, the adhesive has very good flow properties.

Preferably, a cooling circuit system comprises a plurality of

cooling channels.

The adhesive advantageously penetrates into the gaps between two individual sheets, particularly by means of capillary action, and can harden there. The adhesive can also harden through the introduction of heat.

Preferably, the adhesive is of low viscosity.

Due to the low viscosity, the adhesive can be used for

Capillary effect in the smallest gaps, e.g. hairline cracks or

microporosities, penetrate and fill them.

The solution of the problem is further achieved by a laminated core comprising a plurality of materially bonded individual sheets such that at least one cooling channel, preferably a cooling circuit system, is sealed in a media-tight manner.

The individual sheets are advantageously treated using an anaerobic

adhesive.

The solution to the problem is also achieved by a dynamo-electric machine, whereby the machine is operated by flowing

Cooling liquid, for example water, can be cooled through at least one cooling channel, comprising such a sheet metal package.

Oil or other liquids can also be used as coolant.

The sheet metal package is sealed by the adhesive, which many

This brings with it advantages. These include the elimination of cooling pipes and the elimination of the assembly process. Even non-circular cooling channel structures can therefore be used for water cooling (or other liquid cooling), e.g. cooling channels for external ventilation.

The invention makes it possible to increase the cooled surface area and thus achieve better cooling properties and lower engine temperatures.

The engine can be better utilized in terms of power and/or torque density.

In addition to the increase in surface area, the axial thermal conductivity of the laminated core is also advantageously increased, since fine

Air pockets / gaps between the individual sheets now with

filled with adhesive.

A space saving in the axial direction through simpler

Deflection in the bearing plate is another advantage.

The machine advantageously has at least one bearing plate, wherein the bearing plate has at least one channel designed to divert the cooling liquid.

A particularly preferred design is one in which two bearing plates are present (A-side and B-side).

In this way, a cooling circuit system can be created, since coolant can flow through the cooling channels and thus cool the machine. The coolant can be diverted in the area of the bearing shield and flow through another cooling channel.

This is advantageously achieved by the channel connecting at least two cooling channels with each other.

The machine is preferably housingless.

The machine advantageously has an inlet for the coolant and an outlet.

The solution to the problem is also achieved by a method for

Operation of a dynamo-electric machine, wherein the machine is cooled by a cooling liquid, wherein the cooling liquid flows through cooling channels.

The cooling liquid is preferably diverted within and/or on at least one bearing plate.

The channel(s) for deflection can, for example, also be integrated into the sheet metal package.

Individual sheets are currently handled advantageously, i.e. aligned and clamped. Baked varnish sheet packages, on the other hand, are difficult to handle due to a complex manufacturing process, in particular due to clamping and baking devices. A further advantage of the process is that the material-locking connection, advantageously gluing, makes it easier to handle the sheet package in subsequent

process steps, for example when inserting a winding.

In the following, the invention is described and explained in more detail using the embodiments shown in the figures. 5 Shown are:

FIG 1 a laminated core,

FIG 2 and 3 possible bearing shield designs,

FIG 4 a dynamoelectric rotary machine with a rotor and a shaft as well as a

Stator,

FIG 5 a manufacturing process,

FIG 6 an operation of the machine.

FIG 1 shows a laminated core 3.

In the figure, the laminated core 3 has a plurality of individual sheets 4. The individual sheets are firmly bonded to one another.

The figure also shows an opening 5 for a rotor and

teeth 6

In the figure, the laminated core has cooling channels 10A..17A and cooling channels 10B..17B.

It is possible to use a state-of-the-art

Sheet metal section should be used which has openings for external ventilation according to the state of the art, see reference numbers 11A, 12A, 13A and 14A. In addition, the sealing allows channels previously used for external ventilation to be closed, see.

Reference numerals 15A, 17A, can be used for water cooling or other cooling liquid cooling.

The channels 10A, 11A, 12A, 13A, 14A, 16A and 10B, 11B, 12B, 13B, 14B, 16B in the sheet metal section according to the state of the art are used for external ventilation, the channels 15A, 17A, 17B for water cooling. The invention allows all channels to be used advantageously for water cooling or another cooling liquid cooling, e.g. oil.

The cooling channels are advantageously separated from each other.

By sealing the individual sheets to each other and to the environment, it is also possible to protect an existing

to use sheet metal cutting.

FIGS 2 and 3 show possible bearing shield designs. The bearing shield 20 in FIG 2 has the channels 31A and 31B, which enable the cooling liquid to be diverted.

The bearing plate 21 in FIG 3 has the channels 40A and 40B, which allow a diversion of cooling liquid.

In addition, an opening 23 is shown. The opening 23 preferably serves as a cable feedthrough from the winding to the terminal box.

FIG 4 shows a dynamoelectric rotary machine 100 with a rotor 101 and a shaft 103 as well as a stator 102.

The stator 102 has a plurality of individual sheets 104 which are connected to one another by means of an adhesive 105.

FIG 5 shows a manufacturing process.

In a method step S1, at least one cooling channel 10A..17A, 10R..17B, preferably the cooling circuit system, is flooded with the adhesive 105.

In a process step S2, the adhesive 105 enters between two individual sheets, in particular by means of capillary action.

chen 4, 104. In other words, this advantageously means: The cooling circuit is preferably flooded with the anaerobic adhesive, whereby the adhesive preferably diffuses between the individual sheets by means of capillary action.

In a process step S3, curing takes place. This can be achieved at ambient temperature or by adding

Warmth.

FIG 6 shows an example of an operation of the machine 100.

The machine is cooled by a cooling liquid in that in a method step S11 the cooling liquid flows through at least one cooling channel 10A..17A, 10B..17B.

In a method step S12, the cooling liquid is diverted within and/or on at least one bearing plate 20, 21.

In a process step S13, another cooling channel is flowed through.

An anaerobic adhesive, preferably of low viscosity, is used to advantageously bond the electrical sheets of the stator

The sheet metal packages are glued together, thereby creating a seal for the cooling circuit.

Thanks to the possibility of a media-tight sheet metal package, the redirection of the water cooling in the area of the bearing plates or alternatively in the front area of the sheet metal package can be solved very easily and in a space-saving manner by geometric milling.

An alternative to milling the front-side sheets is, for example, additional punching in the front-side sheets.

The additional punchings to form deflection channels can also be made within the sheet metal package, i.e. not on the front side.

The advantage here is that the sealing points to the bearing plate are eliminated and the cooling circuit can be completely implemented in the laminated core.

Claims (12)

patent claims 1. Method for producing a laminated core (3) comprising a plurality of individual sheets (4, 104), wherein the individual sheets (4, 104) are materially bonded to one another by an anaerobic adhesive (105) such that at least one cooling channel (10A..17A, 10B..17B), preferably a cooling circuit system, is sealed in a media-tight manner. 2. Method according to claim 1, wherein the cooling channel (10A..17A, 10B..17B), preferably the cooling circuit system, with which the adhesive (105) is flooded. 3. Method according to one of the preceding claims, wherein the adhesive (105), in particular by means of capillary action, enters the gaps between two individual sheets (4, 104) and is cured. 4. A method according to any one of the preceding claims, wherein the adhesive is of low viscosity. 5. Laminated sheet package (3), in particular produced by a method according to one of claims 1 to 4, comprising a plurality of materially connected individual sheets (4, 104) such that at least one cooling channel (10A..17A, 10B..17B), preferably a cooling circuit system, is sealed in a media-tight manner. 6. Laminated sheet package (3) according to claim 5, wherein the individual sheets (4, 104) are connected by means of an anaerobic adhesive (105). 7. Dynamoelectric machine (100), wherein the machine (100) is operated by flowing cooling liquid, for example water and/or oil, through at least one cooling channel (10A..17A, 10B..17B) can be cooled, comprising a laminated core (3) according to one of claims 1 to 6. 8. Dynamoelectric machine (100) according to claim 7, comprising at least one bearing plate (20, 21), wherein the bearing plate (20, 21) has at least one channel (31A, 31B, 40A, 40B) designed to divert the cooling liquid. 9. Dynamoelectric machine (100) according to claim 8, wherein the channel (31A, 31B, 40A, 40B) connects at least two cooling channels (10A...17A, 10B..17B) to one another. 10. Dynamoelectric machine (100) according to one of claims 8 or 9, wherein the machine (100) is housingless. 11. A method for operating a dynamoelectric machine (100) according to one of claims 7 to 10, wherein the machine is cooled by a cooling liquid, wherein cooling channels (10A..17A, 10B..17B) are flowed through by the cooling liquid. the. 12. A method of operation according to claim 11, wherein the cooling liquid is diverted within and/or on at least one bearing plate (20, 21).