CN203423585U - Photoelectric encoder with special insulation structure and particularly used for wind generator - Google Patents
Photoelectric encoder with special insulation structure and particularly used for wind generator Download PDFInfo
- Publication number
- CN203423585U CN203423585U CN201320169087.6U CN201320169087U CN203423585U CN 203423585 U CN203423585 U CN 203423585U CN 201320169087 U CN201320169087 U CN 201320169087U CN 203423585 U CN203423585 U CN 203423585U
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- encoder
- insulation
- main body
- hollow shaft
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Abstract
The utility model discloses a photoelectric encoder with a special insulation structure and particularly used for a wind generator. The photoelectric encoder comprises a sealing member, an insulation sleeve, bearings, an insulation gland, a screw thread compaction member, a photoelectric system, a grating disk, a support ring, a circuit board, a back cover, a waterproof cable joint, an encoder main body, a hollow shaft, a fixed support, and a spacer ring. The hollow shaft is fixedly connected with an output shaft of the generator according to the requirement of precision coupling, the grating disk is fixed on the hollow shaft via the support ring, the hollow shaft is connected with the encoder main body via the sealing member, double bearings, the insulation sleeve, the insulation gland, and the screw thread compaction member, the spacer ring is disposed between the double bearings, the photoelectric system and the circuit board are installed on the encoder main body, the encoder main body is fixed on a generator base via the fixed support, a cable is connected with the circuit board, and is output via the waterproof sealing cable joint. The photoelectric encoder is advantaged by simple structure, no use of an insulation bearing, low cost, and good insulation, can greatly improve a breakdown voltage, and satisfies the work requirements for high reliability and long service lifetime in a heavy-load and bad environment.
Description
Technical field
The utility model relates to a kind of photoelectric encoder, relates in particular to a kind of wind-driven generator photoelectric encoder of special insulation structure.
Background technology
Common wind-driven generator photoelectric encoder on the market, mostly adopt the method for insulation bearing to prevent that wind-driven generator shaft current is transmitted to encoder main body, and insulation bearing is expensive, insulation property reduce even forfeiture under extreme temperature, prevent that breakdown shaft voltage value is lower.Along with wind power generation acc power increases day by day, more and more higher to the insulating requirements of encoder, insulation bearing originally is more and more difficult to adapt to.Other adopts the method for encoder insulation adaptive shaft to reach the object of insulation, and encoder insulation adaptive shaft is installed very numerous and diverse, supplementary insulation connector, increases axial length, and cost is high.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of wind-driven generator special photoelectric encoder of special insulation structure, need not expensive insulation bearing and the numerous and diverse encoder insulation adaptive shaft of installation.Not only easy for installation for wind-force electrical machinery speed feedback, only need conventional bearing, and strengthened insulating capacity, improved breakdown shaft voltage value, promoted shaft current protective capacities.
The utility model is achieved in that
A wind-driven generator special photoelectric encoder for structure, comprises seal, insulating case, bearing, insulation gland, screw thread compressing member, electro-optical system, grating disc, support ring, wiring board, bonnet, Waterproof cable joint, encoder main body, hollow shaft, fixed support, spacer ring.Hollow shaft is by Accuracy Matching requirement and generator output shaft fixed connection, and grating disc is fixed on hollow shaft by support ring; Hollow shaft is connected with encoder main body through seal, duplex bearing, insulating case, insulation gland, screw thread compressing member; Between duplex bearing, be provided with spacer ring; Electro-optical system (containing luminous tube, indication grating and the photoelectric apparatus array corresponding with grating disc code channel), wiring board are arranged on encoder main body; Encoder main body is fixed on generator pit by fixed support; Cable is connected with wiring board, through waterproof sealing cable joint, exports.
Described insulating case, insulation gland material can be: plastics, glass fibre, pottery or its combination.
Described insulating case, insulation gland can adopt cheap casting or processing method to realize.
Described insulating case and insulation gland surfaces externally and internally adopt recessed cord tissue.
Two bearings outer shroud and insulating case, adopt matched in clearance between insulating case and encoder main body, with glue, fixes.
Described grating disc material can be: metal, glass, plastics.
Described spacer ring is metal material.
Described hollow shaft and bearing inner ring adopt interference fit, and hollow shaft is by requirement Precision Machining such as axialities.The matching precision of encoder and generator output shaft mainly guarantees by encoder hollow shaft machining accuracy, is easy to realize, and relaxed significantly the requirement on machining accuracy of insulating case, insulation gland, adopts cheap casting method just can realize.
When in use: the encoded device hollow shaft of generator output shaft drives grating disc synchronous rotary, in electro-optical system, luminous tube sends constant light beam, be radiated on grating disc, the same pitch of grating disc and indication grating, forming grating pays, grating disc rotates with generator output shaft, grating is paid light beam is modulated, form Moire fringe, through photoelectric apparatus, receive and convert to the signal of telecommunication, after amplification, logical process, linear drive circuit by the cable output signal of telecommunication corresponding with angle (generally contain A,
, B,
, I,
six phase signals).
The encoded device hollow shaft of generator output shaft is connected with two bearing inner rings, and two outer races are connected with encoder main body through insulating case, insulation gland, have realized the insulation of generator output shaft and encoder main body without insulation bearing.
Insulating case is different with the thickness of insulation gland, and proof voltage value is different.The size of the highest shaft voltage that can produce according to generator in design, selects the thickness of insulating case and insulation gland.As the material of insulating case and insulation gland is selected a kind of engineering plastics, dielectric strength > 170KV/mm, when thickness=2mm, the puncture voltage of encoder will, higher than ten thousand volts, can meet following wind-driven generator to the ever-increasing needs of encoder shaft current protective capacities.
Insulating case and insulation gland not heat conduction, avoided generator, through output shaft, heat is passed to encoder and affected encoder normal operation.
In insulation property, require extra high occasion, can change conventional bearing into insulation bearing, this encoder just can form the two insulation of insulation redundancy, has not only improved proof voltage intensity, also because Redundancy Design makes encoder insulating properties, obtains Reliable guarantee.
This encoder adopts firm large loading bearing of aluminium alloy casing, long-life, electro-optical system, highly reliable treatment circuit, sealing, surface anticorrosion to process and special insulation system, can meet that wind-driven generator is highly reliable under utmost point severe environmental conditions, long-life requirements of one's work.
The utility model beneficial effect is:
1. adopt special insulation structure, use conventional bearing, need not expensive insulation bearing, just can realize the electric insulation of encoder main body and generator output shaft.
2. the selection of pair insulating case and insulation gland material, thickness, can increase substantially breakdown voltage value.
3. the main body insulation to the outer shroud of duplex bearing and encoder simultaneously, debugging is exempted from simple in structure, easy for installation, installation.
4. because insulation bearing kind is few, adopt conventional bearing can widen bearing range of choice.If any wind-driven generator require to work under-50 ℃ of conditions, insulation bearing is difficult to meet, the utility model is easily realized.
5. insulating case and insulation gland not only can adopt cheap cast molding but also can adopt machining.
6. isolated the impact of generator heat on encoder.
7. wind power generation acc power increases day by day, more and more higher to the insulating requirements of encoder, and the utility model can meet preferably blower fan and further develop the requirement to shaft current protection.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model insulating case front schematic view.
Fig. 3 is the utility model insulating case schematic cross-section.
Fig. 4 is the utility model insulation gland front schematic view.
Fig. 5 is the utility model insulation gland schematic cross-section.
In figure 1, seal, 2, insulating case, 3, bearing, 4, insulation gland, 5, screw thread compressing member, 6, electro-optical system, 7, grating disc, 8, support ring, 9, wiring board, 10, bonnet, 11, waterproof sealing cable joint, 12, encoder main body, 13, hollow shaft, 14, fixed support, 15, spacer ring, 16, wind-driven generator, 17, generator output shaft.
Embodiment
A wind-driven generator special photoelectric encoder for structure, comprises seal 1, insulating case 2, bearing 3, insulation gland 4, screw thread compressing member 5, electro-optical system 6, grating disc 7, support ring 8, wiring board 9, bonnet 10, Waterproof cable joint 11, encoder main body 12, hollow shaft 13, fixed support 14, spacer ring 15.Hollow shaft 13 is connected by Accuracy Matching requirement and generator output shaft 17, and grating disc 7 is fixed on hollow shaft 13 by support ring 8; Hollow shaft 13 is connected with encoder main body 12 through seal 1, duplex bearing 3, insulating case 2, insulation gland 4, screw thread compressing member 5; Between duplex bearing, be provided with spacer ring 15; Electro-optical system 6 (containing luminous tube, indication grating and the photoelectric apparatus array corresponding with grating disc code channel), wiring board 9 are arranged on encoder main body 12; Encoder main body 12 is fixed on wind-driven generator 16 supports by fixed support 14; Cable is connected with wiring board 9, through 11 outputs of waterproof sealing cable joint.
Described insulating case 2, insulation gland 4 materials can be: plastics, glass fibre, pottery or its combination.
Described insulating case 2, insulation gland 4 can adopt cheap casting or processing method to realize.
Described insulating case 2 and insulation gland 4 surfaces externally and internallies adopt recessed cord tissue.
Two bearings 3 outer shrouds and insulating case 2, adopt matched in clearance between insulating case 2 and encoder main body 12, with glue, fixes.
Described grating disc 7 materials can be: metal, glass, plastics.
Described spacer ring 15 is metal material.
Described hollow shaft 13 adopts interference fit with the interior ring of bearing 3, and hollow shaft 13 is by requirement Precision Machining such as axialities.The matching precision of encoder and generator output shaft mainly guarantees by encoder hollow shaft machining accuracy, is easy to realize, and relaxed significantly the requirement on machining accuracy of insulating case 2, insulation gland 4, adopts cheap casting method just can realize.
When in use: the encoded device hollow shaft 13 of generator output shaft drives grating disc 7 synchronous rotaries, in electro-optical system 6, luminous tube sends constant light beam, be radiated on grating disc 7, the same pitch of grating disc 7 and indication grating, forming grating pays, grating disc 7 rotates with generator output shaft, grating is paid light beam is modulated, form Moire fringe, through photoelectric apparatus, receive and convert to the signal of telecommunication, after amplification, logical process, linear drive circuit by the cable output signal of telecommunication corresponding with angle (generally contain A,
, B,
, I,
six phase signals).
The encoded device hollow shaft 13 of generator output shaft 17 is connected with two interior rings of bearing 3, and two bearing 3 outer shrouds are connected with encoder main body 12 through insulating case 2, insulation gland 4, without insulation bearing, have realized the insulation of generator output shaft 17 with encoder main body 12.
Insulating case 2 is different with the thickness of insulation gland 4, and proof voltage value is different.The size of the highest shaft voltage that can produce according to generator in design, selects the thickness of insulating case 2 and insulation gland 4.As the material of insulating case 2 and insulation gland 4 is selected a kind of engineering plastics, dielectric strength > 170KV/mm, when thickness=2mm, the puncture voltage of encoder will, higher than ten thousand volts, can meet following wind-driven generator to the ever-increasing needs of encoder shaft current protective capacities.
Insulating case 2 and the 4 not heat conduction of insulation gland, avoided, through generator output shaft, heat is passed to encoder and affected encoder normal operation.
In insulation property, require extra high occasion, can change conventional bearing into insulation bearing, this encoder just can form the two insulation of insulation redundancy, has not only improved proof voltage intensity, also because Redundancy Design makes encoder insulating properties, obtains Reliable guarantee.
This encoder adopts firm large loading bearing of aluminium alloy casing, long-life, electro-optical system, highly reliable treatment circuit, sealing, surface anticorrosion to process and special insulation system, can meet that wind-driven generator is highly reliable under utmost point severe environmental conditions, long-life requirements of one's work.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the utility model is not limited to embodiment disclosed and described above, to modifications and changes more of the present utility model, also should fall in the protection range of claim of the present utility model.In addition,, although used some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (7)
1. the wind-driven generator special photoelectric encoder of a special insulation structure, it is characterized in that: comprise seal, insulating case, bearing, insulation gland, screw thread compressing member, electro-optical system, grating disc, support ring, wiring board, bonnet, Waterproof cable joint, encoder main body, hollow shaft, fixed support, spacer ring, hollow shaft is by Accuracy Matching requirement and generator output shaft fixed connection, and grating disc is fixed on hollow shaft by support ring; Hollow shaft is connected with encoder main body through seal, duplex bearing, insulating case, insulation gland, screw thread compressing member; Between duplex bearing, be provided with spacer ring; Electro-optical system, wiring board containing luminous tube, indication grating and the photoelectric apparatus array corresponding with grating disc code channel are arranged on encoder main body; Encoder main body is fixed on generator pit by fixed support; Cable is connected with wiring board, through waterproof sealing cable joint, exports.
2. the wind-driven generator special photoelectric encoder of a kind of special insulation structure according to claim 1, is characterized in that: described insulating case, insulation gland material can be: plastics, glass fibre or pottery.
3. the wind-driven generator special photoelectric encoder of a kind of special insulation structure according to claim 1, is characterized in that: described insulating case and insulation gland surfaces externally and internally adopt recessed cord tissue.
4. the wind-driven generator special photoelectric encoder of a kind of special insulation structure according to claim 1, is characterized in that: two bearings outer shroud and insulating case, between insulating case and encoder main body, adopt matched in clearance, and with glue, fix.
5. the wind-driven generator special photoelectric encoder of a kind of special insulation structure according to claim 1, is characterized in that: described hollow shaft and bearing inner ring adopt interference fit.
6. the wind-driven generator special photoelectric encoder of a kind of special insulation structure according to claim 1, is characterized in that: described grating disc material can be: metal, glass, plastics.
7. the wind-driven generator special photoelectric encoder of a kind of special insulation structure according to claim 1, is characterized in that: described spacer ring is metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320169087.6U CN203423585U (en) | 2013-04-03 | 2013-04-03 | Photoelectric encoder with special insulation structure and particularly used for wind generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320169087.6U CN203423585U (en) | 2013-04-03 | 2013-04-03 | Photoelectric encoder with special insulation structure and particularly used for wind generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203423585U true CN203423585U (en) | 2014-02-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320169087.6U Expired - Fee Related CN203423585U (en) | 2013-04-03 | 2013-04-03 | Photoelectric encoder with special insulation structure and particularly used for wind generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203423585U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048866A (en) * | 2015-07-31 | 2015-11-11 | 上海卫星工程研究所 | Ultrasonic motor based high-precision driving device for effective load and assembly method |
| CN105281478A (en) * | 2014-07-22 | 2016-01-27 | 抚顺煤矿电机制造有限责任公司 | Bearing insulation structure |
| WO2018086151A1 (en) * | 2016-11-08 | 2018-05-17 | 苏州博拉腾信息科技有限公司 | Waterproof hybrid encoder |
-
2013
- 2013-04-03 CN CN201320169087.6U patent/CN203423585U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281478A (en) * | 2014-07-22 | 2016-01-27 | 抚顺煤矿电机制造有限责任公司 | Bearing insulation structure |
| CN105048866A (en) * | 2015-07-31 | 2015-11-11 | 上海卫星工程研究所 | Ultrasonic motor based high-precision driving device for effective load and assembly method |
| WO2018086151A1 (en) * | 2016-11-08 | 2018-05-17 | 苏州博拉腾信息科技有限公司 | Waterproof hybrid encoder |
| CN108063524A (en) * | 2016-11-08 | 2018-05-22 | 苏州博拉腾信息科技有限公司 | A kind of hybrid coder with water-proof function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20160403 |