System and procedure for using Wellenfedern.

[0001] The invention concerns generally electrical machines and in particular a system and a procedure for inserting Wellenfedern into electrical machines.

[0002] Generally an electrical machine becomes, as e.g. a current generator or an engine supervises, by routine regarding suitable maintenance and high efficiency during the enterprise. One of the few aspects of the monitoring of the condition of the electrical machine is the inspection of the stator seaweed coils, in order to guarantee that the windings do not move during the enterprise of the electrical machines. Typically an electrical machine contains a wedge system, in order to cause a radial retaining strength on a stator, in order to make a reduction possible the movement of the stator seaweed coils in a stator slot. A such wedge system can contain Wellenfedern (e.g. Oberseitenund side wave feathers/springs), which are embedded into the fixed winding arrangement. The Wellenfedern are generally in a compression condition, in order to hold the windings from a movement. If however the wedge system becomes loose, the amount of the retaining strength is such reduced that the stator seaweed coils can move during the enterprise. With the time the relative motion of the stator seaweed coils causes a damage the stator seaweeds the surrounding isolation and it can a possible stator seaweed coil error occur. This can lead to electrical short-circuits and grounding and reduce thus the efficiency of the machine and furthermore reduce the period between down-times of the electrical machines. Therefore the monitoring of the condition of the electrical machine is periodically implemented, in order to determine whether any stator seaweed coil movement in the stator slots exceeds pre-determined tolerances.

[0003] If the wedge system (including the Wellenfedern) must be replaced, then a technician must remove the wedge system by hand and insert a new. In order to shorten the down-time during maintenance, it can be desired to leave the engine locally. If the engine will locally leave, Wellenfedern can have extremely difficult to be inserted, in particular side wave feathers/springs, since the arising gaps lead only an insufficient area for the work of the technician and the execution of the desired task. Typically a technician would use a hammer, in order to drive the Wellenfeder into their situation. The distance between the rotor and the stator can be only 30.5 to 61 cm (12 to 24 inches), and this area is too limited for the technician, in order to insert the hammer effectively and to drive the Wellenfeder into the correct situation.

[0004] Therefore a constant need according to a more efficient system and procedure for replacing the wedge system, while the engine will locally leave, which make it for a technician possible to replace Wellenfedern, exists.

[0005] In accordance with an aspect a system contains a compression plate with at least one groove of the invention for using a Wellenfeder and whereby the compression plate a ramp shaped section at an end of it has. A driver plate has at least one guide rail, which is furnished to a groove for a seat within that at least. A percussive tool is furnished to attack at the driver plate and to exercise a driver strength on the driver plate. The compression plate is furnished to at least partly hold the Wellenfeder and the ramp shaped section is furnished to exercise a compression strength on the Wellenfeder while the percussive tool and the driver plate drive the Wellenfeder over the ramp shaped section.

[0006] The Wellenfeder can be a side wave feather/spring.

[0007] Those at least one groove can consist of at least a schwalbenschwanzförmigen groove. Optionally the compression plate can contain two schwalbenschwanzförmige slots.

[0008] Furthermore the compression plate of each managing mentioned system can exhibit: two side rails, which are furnished to support the compression plate in a slot of an electrical machine and whereby the two side rails are furnished to make an adjustment possible of the Wellenfeder.

[0009] In each managing mentioned system those can consist at least one guide rail of at least a schwalbenschwanzförmigen rail.

[0010] The driver plate of each managing mentioned system can contain two schwalbenschwanzförmige rails. Furthermore the percussive tool of each managing mentioned system can exhibit: a slit cap, which is furnished for a seat over a driver end of the percussive tool, whereby the slit cap is furnished to sit over a section of an end of the driver plate.

[0012] The slit cap of the managing mentioned system can consist of acetal resin.

[0013] The compression plate and the driver plate of each managing mentioned system can exist made of acetal resin.

[0014] In accordance with a further aspect of the invention a system is made available to using a Wellenfeder. The system contains a compression plate with at least two schwalbenschwanzförmigen slots and the compression plate contains a ramp shaped section at an end of it. A driver plate has two schwalbenschwanzförmige guide rails, and the schwalbenschwanzförmigen guide rails are furnished for a seat within the schwalbenschwanzförmigen slots. A percussive tool is furnished to attack at the driver plate and to exercise a driver strength on the driver plate. The compression plate is furnished to at least partly hold the Wellenfeder and the ramp shaped section is furnished to exercise a compression strength on the Wellenfeder while the percussive tool and the driver plate press the Wellenfeder over the ramp shaped section.

[0015] Furthermore the compression plate of each managing mentioned system can exhibit: two side rails, which are furnished to support the compression plate in a slot of an electrical machine and whereby the two side rails are furnished to make an adjustment possible of the Wellenfeder.

[0016] Furthermore the percussive tool of each managing mentioned system can exhibit: a slit cap, which is furnished for a seat over a driver end of the percussive tool, whereby the slit cap is furnished to sit over a section of an end of the driver plate.

[0017] In accordance with still a further aspect a procedure for using a Wellenfeder is made available. The procedure contains the steps of the supply of a compression plate with at least one groove, whereby the compression plate contains a ramp shaped section at an end of it, and which is furnished ramp shaped section to exercise a compression strength on the Wellenfeder while the Wellenfeder passes the ramp shaped section. A further step is used for the supply of a driver plate with at least one guide rail, and the guide rail is furnished to sit within at least the groove. Additional steps are at least partly used for making a percussive tool available, which is furnished to attack at the driver plate and to exercise a driver strength on the driver plate, for placing the Wellenfeder on the compression plate, for placing the Wellenfeder and the compression plate in a slot of an electrical machine, and for activating the percussive tool on the driver plate, in order to exercise an impact force on the driver plate and the Wellenfeder. The Wellenfeder is driven by the percussive tool, the driver plate and the ramp shaped section of the compression plate into the slot.

[0018] Furthermore the procedure can exhibit the step:

Makes available that at least a groove as at least a schwalbenschwanzförmige groove.

[0019] Furthermore each managing mentioned procedure can exhibit: Make available to the compression plate with two schwalbenschwanzförmigen slots.

[0020] Furthermore each managing mentioned procedure can exhibit the step: Makes available to the compression plate with two side rails, which are furnished to support the compression plate in a slot of an electrical machine and whereby the two side rails are furnished to make an adjustment possible of the Wellenfeder.

[0021] Furthermore each managing mentioned procedure can exhibit the step: Makes available that at least a guide rail as at least a schwalbenschwanzförmige rail.

[0022] Furthermore each managing mentioned procedure can exhibit the step: Make available to the driver plate with two schwalbenschwanzförmigen rails.

[0023] Furthermore each managing mentioned procedure can exhibit the step: Makes available the percussive tool with a slit cap, which is furnished for a seat over a driver end of the percussive tool, and whereby the slit cap is furnished to sit over a section of an end of the driver plate.

[0024] These and further characteristics, aspects and advantages of the available invention better understandably, if the following detailed description with reference to the attached requirements is read, in which same reference symbols same parts constantly because of the designs will designate, in which:

Fig. 1 a ISO-metric scrap view of a section of the stator of an electrical machine is, which represents a stator wedge arrangement in accordance with an execution form of the invention;

Fig. , that represents 2 a measuring system connected with an exemplary Wellenfeder with the electrical machine of Fig. 1 is used;

Fig. 3 a ISO-metric opinion of a system for inserting a Wellenfeder into a slot in an electrical machine in accordance with an aspect of the available invention illustrates;

Fig. 4 a ISO-metric opinion of the system in accordance with an aspect of the available invention illustrates;

Fig. 5 a cross section opinion the partial of the system in accordance with an aspect of the available invention, inserted into a slot of an electrical machine, illustrates; and

Fig. 6 a ISO-metric opinion of a slit cap in accordance with an aspect of the available invention illustrates.

[0025] One or more specific execution forms of the available invention are below described. In the effort to give a scarce description of these execution forms not all characteristics of an actual implementation in the godfather writing can be described. It might be recognizable that with the development by each such actual implementation as with each technical or constructional project numerous implementation-specific decisions must be made, in order the specific goals of the developer, to e.g. reach as agreement with system related and business-referred restrictions, which from an implementation to the other one to vary to be able. Furthermore it might be recognizable that a such effort of development can be complex and time-consuming, but nevertheless regarding interpretation, production and manufacturing for the normal specialist with the advantage of this disclosure a task of routine would be.

[0026] If elements of different execution forms of the available invention are used, the articles “, “that, which,” and “mentioned, mentioned, are to have one”, mentioned” the meaning that or several from the elements can be present. The terms “exhibiting”, “containing” and “having” are to be including and have the meaning that additional further elements can be present except the listed elements. All examples of operating parameters and/or site conditions do not exclude further parameters/conditions of the revealed execution forms. Furthermore can, as far as not explicitly to the contrary indicated, execution forms, which “exhibit” an element or several elements with a special characteristic or, additional such elements “have” to contain, which do not have this characteristic.

[0027] Fig. 1 illustrates a ISO-metric scrap view of a section of a stator core of an electrical machine with a stator wedge mechanism. The stator core 10 contains several stator teeth 12; whereby the stator teeth contain 12 furthermore stator slots 14, which are furnished for it to take up (also as the stator coils designated) fixed windings 16. The fixed windings 16 are held in the stator slots 14 by several as flat plates 15, supplement sheet metals 18, upper Wellenfedern 20 and stator wedges 21 with tapered edges 22 to the interference with according to formed slots 24 in the side panels of the stator teeth of 12 represented elements. In different applications the flat plate 15 can contain a leading metallic flat plate or a non-metallic flat plate (not leading). The upper Wellenfedern 20 are squeezed together between the stator wedges 21 and supplement sheet metals 18, in order to produce a Kraft, which holds the fixed windings 16 in its situation. The upper Wellenfeder 20 cannot be made from a not leading material, as e.g., however limited to it, of a plastic laminate. The stator core 10 can also several side wave feathers/springs 26 contain, in order to guarantee a close seat of the fixed windings 16 in the stator core 10. The side wave feather/spring 26 can be made of a leading or non conductive material, as e.g., however not limited to it, a plastic laminate or a glass fiber compound material.

[0028] With the time the upper Wellenfedern 16 and/or the side wave feathers/springs 26 can lose their elasticity, so that the stator wedge system becomes loose. This can cause a swinging of the fixed windings 16, what can lead to a damage to the stator core 10 and a possible loss of the electrical machine.

[0029] Fig. a side wave feather/spring 26 illustrates 2. As represented in a ISO-metric opinion, the side wave feather/spring 26 has a unkomprimierte height of h and a wave cycle running along the length L. The wave cycle can extend however also in a 45 degree of angles regarding the length L or in any other suitable angle as desired in specific application. It is to be marked that the wave spring length L and a width a D dependent on the size (as slot 14 in Fig. 1 represented) stator slot to be variable selected. In a further execution form the side wave feather/spring 26 is several times laminated with an upper section situation, a middle section situation and a oppositely arranged lower section situation.

[0030] Fig. a ISO-metric opinion of a system 300 illustrates 3 for inserting a Wellenfeder into a slot in an electrical machine in accordance with an aspect of the available invention. Only as an example a Wellenfeder can be a side wave feather/spring. The electrical machine can be an engine or a generator. The system contains a compression plate of 310 with at least one groove 312 and a ramp shaped section 314 at an end of it. The groove 312 can be trained as a schwalbenschwanzförmige groove. In accordance with an aspect the compression plate 310 can contain one or more schwalbenschwanzförmige slots 312 of the available invention. The compression plate 310 can contain two side rails 316, which are furnished for the support of the compression plate 310 in a slot of an electrical machine. The two side rails 316 can be used to make an adjustment possible of the Wellenfedern. Only as an example know the compression plate, which side rails and/or the ramp section 314 consists of an acetal resin.

[0031] A driver plate 320 contains at least one guide rail 322 and is furnished for a seat in the groove 312. The guide rail 322 can be furnished as a schwalbenschwanzförmige rail. In accordance with an aspect the driver plate contains 320 two or more schwalbenschwanzförmige rails 322 of the available invention. Only as an example the driver plate and the guide rails can consist of an acetal resin.

[0032] A percussive tool 330 is furnished to the interference with the driver plate 320 and for applying a driver strength on the driver plate 320. The percussive tool 330 can be an impact hammer by hand held, by hand Schlagnagler held or any other suitable tools for applying a driver strength on the driver plate 320. For example the percussive tool 330 can be pneumatically more propelled or an electrically propelled impact hammer/Nagler. The percussive tool 330 contains also a slit cap 332, which is furnished for a seat over a driver end of the percussive tool 330. The slit cap 332 is furnished also for a seat over a section of an end of the driver plate 320. Only as an example the slit cap can consist of an acetal resin.

[0033] Fig. a ISO-metric opinion of the system 300 and a Wellenfeder 426, which are placed on the compression plate 310, illustrates 4. During the use of the system 300 a Wellenfeder 426 on the compression plate 310 is placed and the compression plate 310 is furnished to at least partly hold the Wellenfeder. For example the Wellenfeder 426 can by the basis of the compression plate 310, which ramp section 314, which side rails 316 and/or the end of the driver plate 320 are held. The ramp shaped section 314 is furnished to exercise a compression strength on the Wellenfeder as soon as the percussive tool 330 and the driver plate 320 push the Wellenfeder over the ramp shaped section 314.

[0034] Fig. a cross section opinion the partial of the system 300 placed in a slot of an electrical machine illustrates 5. A fixed winding 16 is between two stator teeth 12 and in the slot 14. A Wellenfeder 426 is to be used between the fixed winding 16 and the opposite slot surface 14, and the Wellenfeder walks in the direction indicated by an arrow 550. The compression plate 310 and the Wellenfeder are placed in the slot 14, and both elements lie on the top side of the fixed winding 16. The driver plate is placed on the top side of the Wellenfeder (regarding the design opinion) and (in Fig. 5 not represented) percussive tool on the top side of the driver plate 320 is placed and used to downward drive the Wellenfeder 426 into the slot 14. The ramp shaped surface 314 compresses the Wellenfeder 426, while the Wellenfeder passes the ramp shaped surface, in order to make thereby an using possible of the Wellenfeder between the fixed winding 16 and a opposite surface of the slot 14. After the first Wellenfeder is assigned, the next fixed winding can be used and the process be repeated. The side rails 316 can be furnished also for the distance and attachment at the compression plate 310, so that different sizes of side rails can be used for the adjustment to different widths by slots 14.

[0035] Fig. a ISO-metric opinion of the slit cap 332 illustrates 6. The slit cap 332 contains a first slot 610, which for the admission and seat over the driver plate 320 is furnished. Secondary slots 620 can be used to facilitate the installation of the cap on the percussive tool 330.

[0036] In accordance with a further aspect of the available invention also a procedure for using a Wellenfeder is made available. The procedure contains the steps of the supply of a compression plate with at least one groove, whereby the compression plate exhibits a ramp shaped section at an end of it and the ramp shaped section is furnished on the Wellenfeder for the creation of a compression strength, while the Wellenfeder passes the ramp shaped section. A further step makes a driver plate available with at least one guiing device, whereby the guiing device is furnished to sit in at least the groove. The procedure contains also the step of the supply of a percussive tool, which is furnished to attack at the driver plate and to exercise a driver strength on the driver plate.

[0037] The procedure contains also the steps of the placement of the Wellenfeder on the compression plate, the placement of the Wellenfeder and the compression plate at least partly in a slot of an electrical machine and the placement of the percussive tool on the driver plate. A following step is used for the activation of the percussive tool, in order to apply an impact force on the driver plate and the Wellenfeder, and whereby the Wellenfeder is driven by the percussive tool, the driver plate and the ramp shaped section of the compression plate into the slot. The procedure can contain also the additional steps of the supply that at least a groove as at least a schwalbenschwanzförmige groove, the supply of the compression plate with two schwalbenschwanzförmigen slots, the supply at least of one guiing device as at least a schwalbenschwanzförmiges element and the supply of the driver plate with two schwalbenschwanzförmigen elements. Additionally contain the procedure the steps of the supply of the compression plate with two side rails, which are furnished to support the compression plate in a slot of an electrical machine whereby the two side rails are furnished to make an adjustment possible of the Wellenfeder and the supply of the percussive tool with a slit cap, which is furnished for a seat over a driver end of the percussive tool, is furnished and whereby the slit cap for a seat over a section of an end of the driver plate.

[0038] This description uses examples, in order to reveal and make around also each specialist the invention possible including their best type to convert the invention including the production and use of all elements and systems and the execution of all included procedures into the practice. The patentable scope of protection of the invention is defined by the requirements and can cover further examples, which are evident to the specialist. Such further examples should be contained in the scope of protection of the invention, if they possess structural elements, which do not differ from the wording of the requirements, or if equivalent structural elements with insignificant changes contain them in relation to the wording of the requirements.

[0039] A system is made available to using a Wellenfeder, which contains a compression plate with at least one groove and whereby the compression plate has a ramp shaped section at an end of it. A driver plate has at least one guide rail, which is furnished to a groove for a seat within that at least. A percussive tool is furnished to attack at the driver plate and to exercise a driver strength on the driver plate. The compression plate is furnished to at least partly hold the Wellenfeder and the ramp shaped section is furnished to exercise a compression strength on the Wellenfeder while the percussive tool and the driver plate drive the Wellenfeder over the ramp shaped section.

[0040]

10 stator core

12 stator teeth

14 stator slots

15 flatten plates

16 fixed windings

18 supplement sheet metals

20 upper Wellenfeder

21 wedge

22 chamfered edge

24 groove

26 side wave feather/spring

300 system

310 compression plate

312 groove

314 ramp shaped section

316 side rail

320 driver plate

322 guide rail

330 percussive tool

332 slit cap

426 Wellenfeder

550 part

610 slot

620 slot