CN106848793B

CN106848793B - Variable pitch slip ring electric brush with elastic conductive device

Info

Publication number: CN106848793B
Application number: CN201611253181.4A
Authority: CN
Inventors: 王天子
Original assignee: Moteng Technology Shanghai Co ltd
Current assignee: Moteng Technology Shanghai Co ltd
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2023-07-25
Anticipated expiration: 2036-12-30
Also published as: CN106848793A

Abstract

The invention discloses a variable pitch slip ring electric brush with an elastic conductive device, which has the technical scheme that the variable pitch slip ring electric brush comprises a wiring terminal, a circuit board, a contact spring and an electric brush, wherein the wiring terminal is arranged on one surface of the circuit board; the maintenance frequency is reduced, the self-lubrication and self-maintenance are realized, the stability of the transmission signal is improved, and the maintenance cost is reduced.

Description

Variable pitch slip ring electric brush with elastic conductive device

Technical Field

The invention relates to a variable pitch slip ring electric brush, in particular to a variable pitch slip ring electric brush with an elastic conductive device.

Background

The variable pitch slip ring of the wind generating set is mainly used for conducting transmission of a power channel of a variable pitch motor in a rotating hub of a wind generating set and transmission of control signals and communication signals of other electric devices, and vibration is relatively large due to combined action of the hub along with rotation of blades and other factors, so that the requirements on conduction and vibration resistance of signal transmission are relatively high. If the signal is powered down or data packet loss is serious in the transmission process, the whole unit is stopped finally, so that the signal transmission quality requirement on the variable pitch slip ring is higher. The rotary contact conductive contact structure is studied to improve the conductive vibration influence and the signal transmission quality. The existing conducting ring is unstable in contact with the electric brush, and under the working condition of severe vibration, the contact between the brush wires and the insulating ring is easy to cause the creepage distance to be reduced, and creepage is easy to cause.

At present, chinese patent No. CN205265003U discloses a variable pitch slip ring, which comprises a conductive ring and conductive brush wires, wherein insulating rings are arranged on two sides of the conductive ring, a groove surrounding a circle is arranged on the outer side of the conductive ring, a brush head matched with the groove is arranged at the end of the conductive brush wire, and the brush head is in line contact or surface contact with the bottom of the groove. The variable pitch slip ring keeps the same ring width of the conductive ring, the conductive contact area is increased, the original point contact is changed into line contact or surface contact, the contact resistance is reduced, and the signal transmission quality is improved; the T-shaped groove structure has good guiding and limiting effects, the conductive brush wire can be well positioned in the T-shaped groove during rotation and is not contacted with the insulating ring, the electric creepage distance is well ensured, meanwhile, the brush wire and the ring are ensured to be in rotary contact stably, but the electric brush applied to the domestic wind field at present adopts a metal wire structure, the contact cross section area of the structure is small, the contact pressure of the metal brush is light, the metal brush is easy to jump, the ring is easy to break, the service life is short, the maintenance period is shortened, the maintenance frequency is high, and the maintenance downtime is long. Bringing economic loss of overlong shutdown to owners. The slip ring contact device of most of the wind power plants in China is of a metal wire structure, is worn too fast, and is unstable when transmitting signals. The metal wire structure contact has dirt to adhere to the surface during working operation, so that poor contact is caused, the cleaning and maintenance difficulty is high, and time and labor are consumed.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide a variable pitch slip ring electric brush with an elastic conductive device.

In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a become oar sliding ring brush with elasticity electrically conductive device, includes binding post, circuit board, contact shell fragment and brush, binding post sets up on the one side of circuit board, be provided with the insert copper conducting strip between circuit board and the binding post, square hole is opened to insert copper conducting strip both sides, be equipped with the elasticity buckle on the contact shell fragment, be equipped with square mouth on the circuit board, the elasticity buckle of contact shell fragment is installed in the square mouth of circuit board, the brush is dovetail type brush, the one end of contact shell fragment is equipped with the elasticity buckle, and the other end then is connected with strengthening rib and dovetail type brush, be equipped with on the contact shell fragment with dovetail type brush complex installation dovetail, dovetail type brush fixed connection is in the installation dovetail.

Preferably, the connection terminal is fixed to the circuit board by means of an open mold.

Preferably, the connecting terminals are in a group, the circuit board is in one piece, the carbon brush frame is in ten groups, the contact spring pieces are in ten pieces, and the electric brushes are in ten pieces.

Compared with the prior art, the invention has the following advantages: the elastic conductive structure solves the problems of light pressure, easy needle jump, easy abrasion, ring damage and short service life caused by the adoption of the metal wire structure electric brush; the maintenance frequency is reduced, the self-lubrication and self-maintenance are realized, the stability of the transmission signal is improved, the maintenance cost is reduced, and the conductive elastic sheet and the circuit board are respectively designed into an elastic buckle and square opening structure, so that the conductive elastic sheet is convenient to install and replace; the elastic buckle and the circuit board are assembled in a surface mounting mode, so that the problems of dislocation, infirm and the like in mounting of metal wire points are solved. The conductive elastic sheet adopts a reinforcing rib structure, so that the strength of the elastic contact is increased, and the problems of easy breakage of the sheet and unsatisfactory tin filling are solved. The dovetail groove structures are designed on the conductive elastic sheet and the electric brush, so that the electric brush contact is convenient to install; the problem that the electric brush falls off when running is effectively solved by adopting a high-temperature hot-flow filling welding process to the electric brush and the conductive elastic sheet, and the electric brush adopts a silver alloy carbon brush structure, so that the contact area of the contact and the sliding part is increased, and the phenomenon of unstable point contact signals is effectively solved. The brush adopts silver alloy carbon brush wear-resistant material to effectively solve on the market wire contact life weak point, improves product life, reduces product maintenance frequency.

Drawings

FIG. 1 is a schematic diagram of an embodiment of a brush with a flexible conductive device for a pitch slip ring according to the present invention;

FIG. 2 is a schematic diagram II of an embodiment of a brush with a flexible conductive device for a pitch slip ring according to the present invention;

fig. 3 is a schematic structural view of a contact spring in an embodiment of the brush with a flexible conductive device.

In the figure: 1. a connection terminal; 2. a circuit board; 3. a contact spring plate; 4. dovetail groove type brushes; 5. an elastic buckle; 6. inlaid copper conducting strips; 7. a square mouth; 8. square holes; 9. and installing a dovetail groove.

Detailed Description

The following describes the embodiment of the electric brush with the elastic conductive device and the variable pitch slip ring in the invention further with reference to the accompanying drawings.

The utility model provides a become oar sliding ring brush with elastic conduction device, including binding post 1, circuit board 2, contact shell fragment 3 and brush, binding post 1 sets up on the one side of circuit board 2, be provided with the insert copper conducting strip 6 between circuit board 2 and the binding post 1, square hole 8 is opened to insert copper conducting strip 6 both sides, be equipped with elastic buckle 5 on the contact shell fragment 3, be equipped with square mouth 7 on the circuit board 2, elastic buckle 5 of contact shell fragment 3 installs in square mouth 7 of circuit board 2, the brush is dovetail type brush 4, the one end of contact shell fragment 3 is equipped with elastic buckle 5, the other end then is connected with strengthening rib and dovetail type brush 4, dovetail type brush 4 is the cambered surface towards being close to contact shell fragment 3 one side indent, be equipped with on the contact shell fragment 3 with dovetail type brush 4 complex installation dovetail 9, dovetail type brush 4 fixed connection is in installation dovetail 9. The elastic conductive structure solves the problems of light pressure, easy needle jump, easy abrasion, ring damage and short service life caused by the adoption of the metal wire structure electric brush; the maintenance frequency is reduced, the self-lubrication and self-maintenance are realized, the stability of the transmission signal is improved, the maintenance cost is reduced, and the conductive elastic sheet and the circuit board 2 are respectively designed into the structures of the elastic buckle 5 and the square opening 7, so that the conductive elastic sheet is convenient to install and replace; the elastic buckle 5 is assembled with the circuit board 2 in a surface mounting mode, so that the problems of dislocation, infirm and the like in mounting of metal wire points are solved. The conductive elastic sheet adopts a reinforcing rib structure, so that the strength of the elastic contact is increased, and the problems of easy breakage of the sheet and unsatisfactory tin filling are solved. The dovetail groove structures are designed on the conductive elastic sheet and the electric brush, so that the electric brush contact is convenient to install; the problem that the electric brush falls off when running is effectively solved by adopting a high-temperature hot-flow filling welding process to the electric brush and the conductive elastic sheet, and the electric brush adopts a silver alloy carbon brush structure, so that the contact area of the contact and the sliding part is increased, and the phenomenon of unstable point contact signals is effectively solved. The brush adopts silver alloy carbon brush wear-resistant material to effectively solve on the market wire contact life weak point, improves product life, reduces product maintenance frequency. The elastic buckle 5 of the conductive spring piece is arranged in the square opening 7 of the circuit board 2, so that the installation and the replacement are convenient; the electric brush dovetail groove is fixed in the dovetail groove of the conductive elastic sheet, and is fixed on the contact elastic sheet 3 by lead-free environment-friendly tin through a high-temperature heat flow filling welding process; the conductive spring plate has good elastic performance, and plays a role in fixing the main body of the conductive device for supplying enough pressure to the electric brush to enable the electric brush to transmit current between the electric brush and the sliding part in the use process, the wiring terminal 1 is distributed on one side of the circuit board 2, the elastic buckle 5 of the contact spring plate 3 is fixed in the square opening 7 of the circuit board 2, the fixing effect is achieved, and the elastic force of the conductive spring plate supplies the pressure to the carbon brush in use

The wiring terminal 1 has a set, and circuit board 2 has a piece, and the carbon brush frame has ten sets, and contact shell fragment 3 has ten, and the brush has ten.

The integral conductive contact system material comprises: the wiring terminal 1 is made of ABS flame-retardant material, the conductive spring piece is made of beryllium bronze, the circuit board 2 is made of PPS material, and the brush is made of silver alloy.

The foregoing is merely a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, but all technical solutions falling under the concept of the present invention fall within the scope of the present invention, and it should be noted that, for those skilled in the art, these modifications and improvements should also be considered as the scope of the present invention without departing from the principle of the present invention.

Claims

1. A become oar sliding ring brush with elasticity electrically conductive device, its characterized in that: the novel electric brush comprises a wiring terminal, a circuit board, a contact spring and an electric brush, wherein the wiring terminal is arranged on one surface of the circuit board, an embedded copper conducting piece is arranged between the circuit board and the wiring terminal, square holes are formed in two sides of the embedded copper conducting piece, an elastic buckle is arranged on the contact spring, a square opening is formed in the circuit board, the elastic buckle of the contact spring is arranged in the square opening of the circuit board, the electric brush is a dovetail-shaped electric brush, one end of the contact spring is provided with the elastic buckle, the other end of the contact spring is connected with a reinforcing rib and the dovetail-shaped electric brush, an installation dovetail groove matched with the dovetail-shaped electric brush is formed in the contact spring, and the dovetail-shaped electric brush is fixedly connected in the installation dovetail groove;

the end face of one side of the dovetail groove type electric brush far away from the contact spring plate is an inward concave cambered surface facing one side close to the contact spring plate;

the dovetail groove type electric brush is made of silver alloy;

the dovetail groove type electric brush and the contact spring plate are subjected to high-temperature hot-flow filling welding;

the reinforcing rib is formed by sinking the bottom surface of the contact spring plate.

2. The brush with resilient conductive means for a pitch slip ring as defined in claim 1 wherein: the wiring terminal is fixed on the circuit board through die pressing.

3. The brush with resilient conductive means for a pitch slip ring as defined in claim 1 wherein: the wiring terminal has a group, the circuit board has one, the contact shell fragment has ten, the brush has ten.