CN108281866B - Vibration fatigue resistant electric variable pitch propeller carbon brush device - Google Patents
Vibration fatigue resistant electric variable pitch propeller carbon brush device Download PDFInfo
- Publication number
- CN108281866B CN108281866B CN201711445379.7A CN201711445379A CN108281866B CN 108281866 B CN108281866 B CN 108281866B CN 201711445379 A CN201711445379 A CN 201711445379A CN 108281866 B CN108281866 B CN 108281866B
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- carbon block
- carbon
- spring
- cover plate
- chute
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- 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
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/26—Solid sliding contacts, e.g. carbon brush
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- 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
- H01R39/36—Connections of cable or wire to brush
-
- 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
- H01R39/40—Brush holders enabling brush movement within holder during current collection
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
The invention discloses an anti-vibration fatigue electric variable pitch propeller carbon brush device which comprises a brush holder, a cover plate, a carbon block assembly and the like. Wherein, the upper part of the brush holder is provided with a carbon block chute, and the middle part of the carbon block chute is provided with a spring groove for keeping the groove, thereby providing a telescopic moving track for the carbon block component. Furthermore, the lower part of the rear surface of the brush holder side is provided with a threaded hole, the threaded hole is fastened and connected with a cover plate through a screw to form a complete rectangular sliding groove, and the cover plate is provided with a hole for the lead of the carbon block to pass through. In addition, the carbon block conducting wire adopts a braided wire, the spring and the plastic sleeve are sequentially penetrated on the carbon block conducting wire, the carbon block freely stretches and moves in the carbon block sliding groove, and the carbon block conducting wire freely penetrates out through the hole on the cover plate. The carbon brush device of the electric variable pitch propeller has the advantages of simple structure, convenience in installation and replacement, strong anti-vibration fatigue capability and good portability, and can be reliably used in a severe vibration environment formed by the electric variable pitch propeller and an engine.
Description
Technical Field
The invention belongs to the technical field of aviation aircraft mechanisms, and particularly relates to an anti-vibration fatigue electric variable pitch propeller carbon brush device.
Background
The electric variable pitch propeller is one of variable pitch propellers, a variable pitch motor is usually arranged on a propeller hub body and rotates along with the propeller, and the power supply and control of the variable pitch motor by airborne equipment are realized through a carbon brush-slip ring structure, so that the purpose of controlling the rotating speed of the propeller is achieved. The carbon brush-slip ring structure is a common structural form for realizing the conductive connection of a static part and a rotating part, and is widely applied in the field of generators. Carbon brushes used in the aerospace sector have more stringent requirements with regard to size, reliability and vibration environment.
Electric variable pitch propellers at home and abroad are generally provided with carbon brush devices according to the structural size characteristics of the propellers. The carbon brushes of different designs differ in terms of reliability, maintainability and use costs. Due to the insufficient consideration of the vibration environment of the engine propeller, the foreign electric variable pitch propeller even has the frequent failure of the carbon block wire breakage.
The reliability of the carbon brush of the electric variable pitch propeller influences the realization of the rotating speed adjusting function of the propeller of the aircraft, and has important significance on the safety of the aircraft. The carbon block of the carbon brush belongs to a loss part, and whether the replacement is convenient and the replacement cost are important links for improving the field maintenance efficiency of the airplane and reducing the maintenance cost.
Disclosure of Invention
The technical problem of the invention is solved: the electric variable pitch propeller carbon brush device has the advantages of overcoming the defects of the prior art, being convenient to install and replace, strong in anti-vibration fatigue capability and good in transportability, being simple in structure, being capable of being reliably used in a severe vibration environment formed by the electric variable pitch propeller and an engine, and being capable of being used on various electric variable pitch propellers after being designed by adjusting the structural size.
In order to solve the technical problem, the invention discloses an electric variable pitch propeller carbon brush device resisting vibration fatigue, which comprises: the brush holder (1), the carbon block (2), a carbon block lead (21) connected with the carbon block (2), a spring (3), a plastic sleeve (4) and a cover plate (5);
the upper part of the brush holder (1) is provided with a carbon block chute (7), and the middle part of the carbon block chute (7) is provided with a spring retaining groove (8);
the carbon block (2) is arranged in the carbon block chute (7), and the carbon block (2) can move telescopically along the carbon block chute (7);
the cover plate (5) is fixedly connected with the brush holder (1) through a screw (6) to form a complete rectangular sliding chute; wherein, the side surface of the cover plate (5) is provided with an opening (51) for the carbon block lead (21) to pass through;
the spring (3) and the plastic sleeve (4) are sequentially penetrated on the carbon block lead (21), and the carbon block lead (21) can freely penetrate through the inner hole of the plastic sleeve (4).
In the above anti-vibration fatigue electric pitch-variable propeller carbon brush device,
the carbon block chute (7) is a through groove;
the spring retaining groove (8) is a groove with a closed bottom end.
In the above anti-vibration fatigue electric pitch-variable propeller carbon brush device,
the spring (3) is arranged in the spring retaining groove (8); when the carbon block (2) is not pressed into the carbon block sliding groove (7), the two ends of the spring (3) are limited and positioned by the boundary of the spring retaining groove (8) and the cylindrical step (41) of the plastic sleeve (4) respectively; when the carbon block (2) is pressed into the carbon block sliding groove (7), the two ends of the spring (3) are limited and positioned by the lug boss (22) at the root of the carbon block (2) and the cylindrical step (41) of the plastic sleeve (4) respectively;
two ends of the plastic sleeve (4) are limited and positioned by the spring (3) and the opening hole (51) on the cover plate (5) respectively.
In the above anti-vibration fatigue electric pitch-variable propeller carbon brush device,
the transverse clearance between the carbon block (2) and the rectangular chute is less than 0.1 mm.
In the above anti-vibration fatigue electric pitch-variable propeller carbon brush device,
the carbon block lead (21) is a braided wire.
In the above anti-vibration fatigue electric pitch-variable propeller carbon brush device,
the connection form of the carbon block (2) and the carbon block lead (21) is embedded, and the carbon block lead (21) is embedded when the carbon block (2) is formed by adopting carbon powder through die casting; wherein the embedded length of the carbon block wire (21) is half of the length of the carbon block (2).
In the above-mentioned electronic pitch-variable propeller carbon brush device of resisting vibration fatigue, still include: insulating leather I (10) and insulating leather II (11)
The insulating leather I (10) is wrapped on the outer side of the lug boss (22) at the root of the carbon block (2);
the insulating sheath II (11) is wrapped on the outer side of the carbon block lead (21).
The invention has the following advantages:
(1) the electric variable pitch propeller carbon brush device capable of resisting vibration fatigue is simple in structure and convenient to install and replace.
(2) According to the electric variable pitch propeller carbon brush device capable of resisting vibration fatigue, the carbon block conducting wire is a braided wire and can freely penetrate out of the brush holder, and the electric variable pitch propeller carbon brush device is high in vibration fatigue resistance and high in reliability.
(3) The anti-vibration fatigue electric variable pitch propeller carbon brush device has the advantages that the portability of the installation design of the brush holder is high, and the design of the carbon brush device can be rapidly completed according to the size requirements of the slip rings of propellers of different models.
Drawings
FIG. 1 is a schematic structural diagram of an electric pitch-variable propeller carbon brush device resisting vibration fatigue according to an embodiment of the invention;
FIG. 2 is an exploded view of an electrical pitch propeller carbon brush assembly to resist vibration fatigue in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a brush holder according to an embodiment of the present invention;
fig. 4 is a schematic view of the connection between a carbon block and a carbon block wire in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, common embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The invention discloses an anti-vibration fatigue electric variable pitch propeller carbon brush device which comprises a brush holder, a cover plate, a carbon block assembly and the like. Wherein, the upper part of the brush holder is provided with a carbon block chute, and the middle part of the carbon block chute is provided with a spring groove for keeping the groove, thereby providing a telescopic moving track for the carbon block component. Furthermore, the lower part of the rear surface of the brush holder side is provided with a threaded hole, the threaded hole is fastened and connected with a cover plate through a screw to form a complete rectangular sliding groove, and the cover plate is provided with a hole for the lead of the carbon block to pass through. In addition, the carbon block conducting wire adopts a braided wire, the spring and the plastic sleeve are sequentially penetrated on the carbon block conducting wire, the carbon block freely stretches and moves in the carbon block sliding groove, and the carbon block conducting wire freely penetrates out through the hole on the cover plate. The carbon brush device of the electric variable pitch propeller has the advantages of simple structure, convenience in installation and replacement, strong anti-vibration fatigue capability and good portability, and can be reliably used in a severe vibration environment formed by the electric variable pitch propeller and an engine.
Referring to fig. 1, a schematic structural diagram of an electric pitch-variable propeller carbon brush device resisting vibration fatigue according to an embodiment of the invention is shown; referring to fig. 2, an exploded view of an electric variable pitch propeller carbon brush device resisting vibration fatigue according to an embodiment of the invention is shown; referring to fig. 3, there is shown a schematic structural view of a brush holder according to an embodiment of the present invention. In this embodiment, electronic pitch propeller carbon brush device of anti-vibration fatigue includes: the carbon block brush comprises a brush holder 1, a carbon block 2, a carbon block lead 21 connected with the carbon block 2, a spring 3, a plastic sleeve 4 and a cover plate 5.
As shown in figures 1-3, the upper part of the brush holder 1 is provided with a carbon block chute 7, and the middle part of the carbon block chute 7 is provided with a spring retaining groove 8. The carbon block 2 is arranged in the carbon block chute 7, and the carbon block 2 can move telescopically along the carbon block chute 7. The cover plate 5 is fastened and connected with the brush holder 1 through a screw 6 to form a complete rectangular sliding chute; wherein, the side of the cover plate 5 is provided with an opening 51 for the carbon block lead 21 to pass through. The spring 3 and the plastic sleeve 4 are sequentially threaded on the carbon block lead 21, and the carbon block lead 21 can freely pass through the inner hole of the plastic sleeve 4.
In a preferred embodiment of the present invention, as shown in fig. 3, the carbon block chute 7 is a through slot; the spring keeping groove 8 is a groove with a closed bottom end.
In a preferred embodiment of the invention, the spring 3 may be disposed in the spring retention groove 8, as shown in fig. 2 and 3. When the carbon block 2 is not pressed into the carbon block sliding groove 7, the two ends of the spring 3 are limited and positioned by the boundary of the spring retaining groove 8 and the cylindrical step 41 of the plastic sleeve 4. When the carbon block 2 is pressed into the carbon block sliding groove 7, the two ends of the spring 3 are limited and positioned by the lug boss 22 at the root of the carbon block 2 and the cylindrical step 41 of the plastic sleeve 4 respectively. Furthermore, the two ends of the plastic sleeve 4 are limited and positioned by the spring 3 and the opening 51 on the cover plate 5 respectively.
In the embodiment, the spring retaining groove 8 is matched with the plastic sleeve 4 to realize the installation and positioning of the spring 3 in the carbon block sliding groove 7, and the spring 3 is kept to linearly extend and retract without deflection in the extending and retracting process of the carbon block 2, so that the carbon block lead 21 is prevented from being damaged.
Further, in the embodiment, when the carbon block 2 moves in the carbon block sliding groove 7 of the brush holder 1 in a telescopic manner, the carbon block wire 21 can freely penetrate out of the cover plate 5 through the inner hole of the plastic sleeve 4, so that the carbon block wire 21 can be prevented from being bent violently, the bending stress at the root of the connection between the carbon block 2 and the carbon block wire 21 is reduced, and the bending fatigue life of the carbon block wire 21 is prolonged.
In addition, the spring 3 and the plastic sleeve 4 are arranged on the carbon block lead 21 in a penetrating way, so that the carbon block 2 is convenient to replace after being worn in normal work.
In a preferred embodiment of the invention, the lateral clearance between the carbon block 2 and the rectangular chute is less than 0.1 mm.
In the embodiment, the transverse clearance between the carbon block 2 and the rectangular sliding groove is less than 0.1mm, so that the transverse vibration and impact of the carbon block 2 relative to the brush holder 1 in a vibration environment can be avoided, the integrity of the carbon block 2 is kept, and the failure damage such as tooth breakage, fragmentation and the like is avoided.
In a preferred embodiment of the invention, the carbon block wire 21 is a braided wire.
In the embodiment, the carbon block wire 21 is a braided wire, has good bending fatigue resistance, and can reliably work in a strong vibration environment.
In a preferred embodiment of the present invention, the connection form of the carbon block 2 and the carbon block wire 21 is embedded, and the carbon block wire 21 is embedded when the carbon block 2 is formed by carbon powder die casting. Wherein the embedded length of the carbon block wire 21 is half of the length of the carbon block 2.
In a preferred embodiment of the present invention, referring to fig. 4, a schematic diagram of the connection of a carbon block and a carbon block wire in the embodiment of the present invention is shown. The electric variable pitch propeller carbon brush device resisting vibration fatigue can further comprise: insulating skin I10 and insulating skin II 11.
As shown in fig. 4, the insulating skin I10 is wrapped on the outer side of the lug boss 22 at the root of the carbon block 2; the insulating sheath II 11 is wrapped on the outer side of the carbon block wire 21.
Based on the above embodiments, for convenience of explanation, the assembly process of the carbon brush device of the electric variable pitch propeller against vibration fatigue will be briefly described below. Wherein, the assembly process specifically can be as follows:
1 the spring 3 and the thimble 4 are threaded onto the carbon block wire 21 in the order shown with reference to figure 2, taking care to fit the end of the spring 3 over the boss 22 at the root of the carbon block 2.
2, placing the carbon block 2 and the spring 3 into a carbon block sliding groove 7 in the brush holder 1, and paying attention to the fact that the spring 3 is placed into a spring retaining groove 8.
3, the carbon block lead 21 and the plastic sleeve 4 respectively pass through the inner holes 51 of the cover plate 5 corresponding to the carbon block sliding grooves 7.
4, the cover plate 5 is tightly fixed with the brush holder 1 by screws 6 after being jointed, and the end part of the spring 3 is sleeved on the cylindrical step 41 of the plastic sleeve 4 during the jointing process.
5, after the screw 6 is fastened, the carbon block 2 is pressed into the carbon block sliding groove 7, so that the carbon block 2 can freely move in the carbon block sliding groove 7 in a telescopic mode, the carbon block lead 21 can freely penetrate through the inner hole 51 in the cover plate 5 along with the movement of the carbon block 2, and the carbon brush device is assembled.
It should be noted that, as shown in fig. 3, the carbon block chute 7 is a rectangular through groove, along the expansion direction of the carbon block, the spring retaining groove 8 is formed in the center of the side surface of the carbon block chute 7, the spring retaining groove 8 is not a through groove, and the spring retaining groove 8 can be used as an installation and expansion limiting track of the spring 3. When the carbon block compresses the spring, the spring keeps linear compression deformation in the spring shape-keeping groove, and when the carbon block does not compress the spring, the spring is limited in the carbon block sliding groove by the shape-keeping groove.
Furthermore, the assembled electric variable-pitch propeller carbon brush device resisting the vibration fatigue is fixed near a propeller slip ring through a mounting bracket, carbon brush carbon blocks are respectively pressed on different conductive slip rings of the propeller, a carbon block lead is connected with an airborne equipment cable, a circuit loop is constructed, and the function of the electric variable-pitch propeller carbon brush device resisting the vibration fatigue is exerted.
In conclusion, the electric variable pitch propeller carbon brush device capable of resisting vibration fatigue is simple in structure and convenient to install and replace. Secondly, according to the vibration fatigue resistant electric variable pitch propeller carbon brush device, the carbon block lead is a braided wire and can freely penetrate out of the brush holder, so that the vibration fatigue resistant capability is strong, and the reliability is high. In addition, the anti-vibration fatigue electric variable pitch propeller carbon brush device has strong portability of the installation design of the brush holder, and can rapidly complete the design of the carbon brush device according to the size requirements of the slip rings of propellers of different models.
The embodiments in the present description are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (4)
1. The utility model provides a tired electronic pitch-variable propeller carbon brush device of anti-vibration which characterized in that includes: the brush holder (1), the carbon block (2), a carbon block lead (21) connected with the carbon block (2), a spring (3), a plastic sleeve (4) and a cover plate (5);
the upper part of the brush holder (1) is provided with a carbon block chute (7), and the middle part of the carbon block chute (7) is provided with a spring retaining groove (8);
the carbon block (2) is arranged in the carbon block chute (7), and the carbon block (2) can move telescopically along the carbon block chute (7);
the cover plate (5) is fixedly connected with the brush holder (1) through a screw (6) to form a complete rectangular sliding chute; wherein, the side surface of the cover plate (5) is provided with an opening (51) for the carbon block lead (21) to pass through;
the spring (3) and the plastic sleeve (4) are sequentially penetrated on the carbon block lead (21), and the carbon block lead (21) can freely penetrate through an inner hole of the plastic sleeve (4);
wherein the carbon block chute (7) is a through groove; the spring retaining groove (8) is a groove with a closed bottom end; the spring (3) is arranged in the spring retaining groove (8); when the carbon block (2) is not pressed into the carbon block sliding groove (7), the two ends of the spring (3) are limited and positioned by the boundary of the spring retaining groove (8) and the cylindrical step (41) of the plastic sleeve (4) respectively; when the carbon block (2) is pressed into the carbon block sliding groove (7), the two ends of the spring (3) are limited and positioned by the lug boss (22) at the root of the carbon block (2) and the cylindrical step (41) of the plastic sleeve (4) respectively; the two ends of the plastic sleeve (4) are limited and positioned by the spring (3) and the opening (51) on the cover plate (5) respectively; the transverse clearance between the carbon block (2) and the rectangular chute is less than 0.1 mm.
2. The anti-vibration fatigue electric variable pitch propeller carbon brush device according to claim 1,
the carbon block lead (21) is a braided wire.
3. The anti-vibration fatigue electric variable pitch propeller carbon brush device according to claim 1,
the connection form of the carbon block (2) and the carbon block lead (21) is embedded, and the carbon block lead (21) is embedded when the carbon block (2) is formed by adopting carbon powder through die casting; wherein the embedded length of the carbon block wire (21) is half of the length of the carbon block (2).
4. The anti-vibration fatigue electric variable pitch propeller carbon brush apparatus according to claim 1, further comprising: insulating leather I (10) and insulating leather II (11)
The insulating leather I (10) is wrapped on the outer side of the lug boss (22) at the root of the carbon block (2);
the insulating sheath II (11) is wrapped on the outer side of the carbon block lead (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445379.7A CN108281866B (en) | 2017-12-27 | 2017-12-27 | Vibration fatigue resistant electric variable pitch propeller carbon brush device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445379.7A CN108281866B (en) | 2017-12-27 | 2017-12-27 | Vibration fatigue resistant electric variable pitch propeller carbon brush device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108281866A CN108281866A (en) | 2018-07-13 |
| CN108281866B true CN108281866B (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711445379.7A Active CN108281866B (en) | 2017-12-27 | 2017-12-27 | Vibration fatigue resistant electric variable pitch propeller carbon brush device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498230B (en) * | 2021-12-20 | 2023-10-17 | 中国航天空气动力技术研究院 | Electric brush device |
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| CN2543249Y (en) * | 2002-04-30 | 2003-04-02 | 王厚立 | DC Permanent-magnet speed-reducing motor |
| CN2567832Y (en) * | 2002-08-29 | 2003-08-20 | 中国科学院光电技术研究所 | Rotation conducting structure device |
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| CN108281866A (en) | 2018-07-13 |
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