Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R39/00—Rotary current collectors, distributors or interrupters
  • H01R39/02—Details for dynamo electric machines
  • H01R39/38—Brush holders
  • H01R39/39—Brush holders wherein the brush is fixedly mounted in the holder
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/40—Structural association with grounding devices
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R39/00—Rotary current collectors, distributors or interrupters
  • H01R39/02—Details for dynamo electric machines
  • H01R39/38—Brush holders
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R39/00—Rotary current collectors, distributors or interrupters
  • H01R39/02—Details for dynamo electric machines
  • H01R39/38—Brush holders
  • H01R39/383—Brush holders characterised by the electrical connection to the brush holder

Definitions

• the invention relates to a discharge device for dissipating electrostatic charge from a shaft having a flexurally elastic conductor with a carbon fiber arrangement with at least two arranged on a holder, transversely to a longitudinal axis réellere- ckenden and insulated from the holder conductor portions, which received over their recorded in the holder section ends can be connected to a grounding conductor, wherein the conductor sections each have a wave contact section and the wave contact sections together form a contact arrangement for contacting with two circumference contact areas of a shaft circumference arranged opposite one another in a wave contact plane such that the wave contact sections are tangential on contact with the shaft circumference are arranged to the shaft circumference.
• a discharge device for dissipating electrostatic charge from a shaft in which a carbon fiber arrangement of a plurality of filaments are arranged on a holder which is annular and coaxial with the shaft is arranged. To form a contact contact with the shaft, wave contact portions of the individual filaments are normal to
• the object of the present invention is to propose a discharge device which enables a safe rotation-independent contact with a shaft circumference and which is furthermore suitable for dissipating electrostatic charge of waves having different shaft diameters.
• the discharge device has the features of claim 1.
• the discharge device is provided with a flexurally elastic conductor with a carbon fiber arrangement, which is provided at least two conductor sections arranged on a holder and extending transversely to a shaft longitudinal axis of a shaft to be contacted and insulated relative to the holder.
• the conductor sections can be connected to a ground conductor via their section ends accommodated in the holder.
• the conductor sections have a shaft contact section, which together form a contact arrangement for contacting with two circumferentially contact regions of a shaft circumference arranged opposite one another in a wave contact plane.
• the shaft contact portions are arranged tangentially to the shaft circumference in contact with the shaft circumference.
• the holder may be made of an electrically non-conductive material, in particular of plastic. Due to the at least doubled design of the wave contact sections lying tangentially on the shaft circumference at opposite circumferential contact areas of the shaft circumference, the discharge device according to the invention functions independently of the direction of rotation.
• the arrangement of the flexurally elastic conductor with section ends accommodated in the holder of conductor segments extending transversely to a longitudinal axis makes it possible to contact the shaft contact sections with the shaft circumference at different shaft diameters or shaft circumferences since the shaft contact sections diverge due to the flexurally elastic design of the conductor are movable.
• a flexurally elastic deformation of the conductor sections is required, the shaft contact sections remaining in tangential contact with the shaft circumference.
• An enlargement of the shaft circumference merely results in a displacement of the circumferential contact regions of the shaft arranged on the shaft circumference.
• the section ends of the conductor sections are received relatively movably in conductor guides of the holder, as the distance between the wave contact sections increases, at least a part of the distance increase can be compensated by the relative movement of the section ends in the conductor guides, so that a bending load of the conductor sections is correspondingly reduced becomes.
• the conductor guides are in each case formed from a guide channel in the holder, with a channel diameter which is greater than the conductor diameter.
• the channel diameter of the guide channels widens to form a conductor outlet surface of the holder, so that no bending resistance acts on the conductor sections in the region of the conductor outlet surface. If, according to a further advantageous embodiment, the section ends are longitudinally slidably received in the holder, such that in their length protruding free conductor sections are variable in length, it is possible by changing the free Biegelän- ge of the conductor and the resulting contact force, with the wave contact portions abut the shaft circumference to adjust the size of the contact force.
• connection section serves for connection to the grounding conductor.
• the integrally formed conductor is U-shaped or V-shaped.
• the holder is arranged in a holder plane offset to the wave contact plane, wherein the conductor sections have a transversely extending from the holder plane to the wave contact plane transition section, it is possible adapted for corresponding installation situations, the holder in the direction of the shaft longitudinal axis relative to the wave contact plane to arrange staggered.
• the carbon fiber arrangement of the conductor has a fiber braid which is provided with a coating of pyrolytically deposited carbon, so that the coating of pyrocarbon not only serves to densify a contact surface of the conductor, but beyond that also a Forming fiber braid supporting sheath, which provides in cooperation with the fiber braid for the desired flexural elastic properties of the conductor, which has a flexural rigidity, which is particularly influenced by the thickness of the coating.
• the formation of the coating by the use of the CVI (Chemical Vapor Infiltration) method has proven to be particularly advantageous since this method not only applies to the desired surface coating, but also to the formation of bonding forces between the individual filaments of the fiber structure. braided cares.
• Enveloping a extending in the longitudinal direction of the conductor unidirectional fiber strand is formed, which has substantially parallel filaments, so that through the fiber interstices capillaries are formed, which allow the use of capillary effects for the removal of fat or moisture from the shaft circumference ,
• the fiber braid is provided with a resin matrix. It is particularly advantageous for the practical use of the discharge device as well as for reducing the maintenance effort in connection with the replacement of a conductor of the discharge device, if the holder is designed as a housing cover or is connected to a housing cover.
• FIG. 4 shows a cross section through the conductor shown in FIG. 3; 5 shows a further embodiment of a discharge device in side view;
• a discharge device 10 is shown, which is installed on a arranged in a machine housing 1 1 between a transmission shaft and a motor shaft shaft coupling 14.
• the machine housing 1 1 has a maintenance opening 15 provided with a maintenance opening, wherein the maintenance cover 15 is used at the same time for the arrangement of the discharge device 10.
• the discharge device 10 has a holder 16, which is connected to the maintenance cover 15.
• a holder 16 in the case of the present embodiment, a holder body 17, which is preferably formed of plastic, with a holder body 1 7 formed here U-shaped guide channel assembly 1 8 and
• the guide channel arrangement 1 8 serves to receive a fastening part 20 of a ladder sections 21, 22 led out of the guide channel arrangement 1 8 conductor 23rd
• the conductor 23 which in the case of the present embodiment before its installation, as shown in Fig.
• the conductor sections 21, 22 are provided at their ends with obliquely outwardly positioned conductor ends 28, 29, which prevent the conductor ends 28, 29 in an installation of the discharge device 10, wherein the discharge device 10th radially to a coupling collar 47 of the shaft coupling 14 is fed, are compressed.
• FIG. 2 shows that the conductor sections 21, 22 with wave contact sections 30, 3 1 bear tangentially against a shaft circumference 32 formed in peripheral contact areas 33, 34 by the lateral surface of the coupling collar 47, wherein due to the flexurally elastic configuration of the Conductor portions 2 1, 22, the wave contact portions 30, 3 1 with a contact force K in the peripheral contact areas 33, 34 abut the shaft circumference 32.
• touch tangents tl and t2 which are shown in Fig. 2 in the peripheral contact areas 33, 34.
• the conductor 23 of the discharge device 10 not only enables contacting of its conductor sections 21, 22 with the shaft circumference 32, but moreover also with comparatively larger wave circumferences.
• the result is an increased distance a between the conductor sections 21, 22, which are also shown in this position with dotted line .
• section ends 40, 41 of the conductor sections 2 1, 22 are movably arranged in the guide channels 37, 38, and a bending of the conductor sections 21, 22 essentially takes place lower portion of the guide channels 37, 38, in a transition region between the conductor portions 21, 22 and the connecting portion 24th
• connection section 24 serves to connect a grounding conductor 42.
• FIG. 4 shows an enlarged cross-sectional view of a conductor section 21, 22, which shows that the carbon fiber arrangement of the conductor has a fiber braid 50, which as wrapping a in the longitudinal direction of the conductor 23 extending unidirectional fiber strand 5 1 with substantially parallel to each other Filaments 52 is formed.
• the fiber braid 50 is provided with a coating 53 of pyrolytically deposited carbon, which causes a stiffening of the conductor in the direction of a transverse force acting on it, that is to say the contact force K drawn in FIG. 2.
• a capillary effect is made possible.
• a discharge device 60 which, in contrast to the discharge device 10 explained with reference to FIGS. 1 and 2, has a conductor 61 which has conductor sections 62, 63, which are subsequently formed on a fastening part 64 which serves to receive in a holder 65.
• the conductor sections 62, 63 have obliquely extending transition sections 66, 67, which, as shown in particular in FIG. 5, allow installation of the discharge device 60, such that the holder 65 is arranged in a holder plane H offset from the wave contact plane W.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Elimination Of Static Electricity (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (2)

Family

ID=51619150

Family Applications (1)

Country Status (8)

Cited By (5)

Families Citing this family (4)

Citations (1)

Family Cites Families (16)

• 2014
  • 2014-09-09 CN CN201480049700.8A patent/CN105580218B/zh not_active Expired - Fee Related
  • 2014-09-09 CA CA2921801A patent/CA2921801C/en active Active
  • 2014-09-09 JP JP2016539586A patent/JP6749237B2/ja not_active Expired - Fee Related
  • 2014-09-09 ES ES14772297T patent/ES2929183T3/es active Active
  • 2014-09-09 PL PL14772297.9T patent/PL3044840T3/pl unknown
  • 2014-09-09 WO PCT/EP2014/069211 patent/WO2015032989A2/de not_active Ceased
  • 2014-09-09 EP EP14772297.9A patent/EP3044840B1/de active Active
  • 2014-09-09 US US14/917,381 patent/US10141702B2/en active Active

Patent Citations (1)

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