CN2927473Y - Medium-high speed large-capacity hydraulic-turbine generator set - Google Patents
Medium-high speed large-capacity hydraulic-turbine generator set Download PDFInfo
- Publication number
- CN2927473Y CN2927473Y CNU2006200350364U CN200620035036U CN2927473Y CN 2927473 Y CN2927473 Y CN 2927473Y CN U2006200350364 U CNU2006200350364 U CN U2006200350364U CN 200620035036 U CN200620035036 U CN 200620035036U CN 2927473 Y CN2927473 Y CN 2927473Y
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- Prior art keywords
- assembling
- assembly
- plate
- high speed
- oil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/42—Asynchronous induction generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1823—Rotary generators structurally associated with turbines or similar engines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The utility model relates to a medium and high speed and large capacity Hydro-generator unit, which comprises a foundation tun, an upper cover assembly, a hoisting jack, a shear pin assembly, an upper weather-strip plate assembly, an upper bracket assembly, an upper wind-cited plate assembly, a top dust hood assembly, a slip ring cover assembly, a collecting ring and a brush carrier assembly, a thrust bearing assembly, a rotor assembly, a lower bracket assembly, a brake pipeline, a lower cover assembly, a dirt collector assembly, a fire extinguishing pipe assembly, a lower wind-cited plate assembly, a stator assembly and an air-cooler. The pole coil of the rotor assembly uses a welding structure with cuprum rowing around four angles, the boot part of the magnetic pressure plate of the two ends of ferric core of the magnetic pole is a conical structure, the pole is provided with a crossbar damping winding, besides, a rotary windstrip plate is arranged at the upper and lower ends of the magnetic yoke, and the guide bearing in the centrosome of the upper and lower bracket uses the non-concentric tile. The utility model has a large capacity and rapid rotational speed, being suitable for hydroelectric generating unit with 50 to 80MW and even 100MW.
Description
Technical field
The utility model relates to a kind of hydraulic generator, particularly relates to a kind of high speed large capacity hydroelectric generator group.
Background technology
Along with the capacity of hydraulic generator unit is increasing, speed is more and more higher, and is also more and more higher to the requirement of the ventilation and heat performance of generating set, and the development of high speed large capacity hydroelectric generator and exploitation need solve the ventilation and heat problem of unit well.
Summary of the invention
The purpose of this utility model is to provide a kind of high speed large capacity hydroelectric generator group, has adopted rotation choke plate, fiberglass induced draft plate, no fan structure, pole coil to adopt technology and new constructions such as copper bar four welded corner joints heat radiation circle, conical magnet poles pressing plate, the novel fixed form of damping ring, guide bearing gasket type support pin of spherical end in this generating set design.
Goal of the invention of the present utility model realizes by technical scheme once: a kind of high speed large capacity hydroelectric generator group, comprise the hydraulic turbine, generator, generator comprises the grain bin, basis at least, the upper cover plate assembling, jack and shear pin assembling, last deep bead assembling, the upper bracket assembling, last induced draft plate assembling, the overhead guard assembling, the slip ring cover assembling, collector ring and brush holder assembling, the thrust bearing assembling, the rotor assembling, the lower bearing bracket assembling, brake piping, the lower cover assembling, the dust catcher assembling, the fire main assembling, following induced draft plate assembling, stator assembling and aerial cooler, wherein, the upper bracket assembling comprises upper bracket processing at least, the cover plate assembling, on lead seal cover, the top guide bearing assembling, oil seal ring, upper oil-pan and oil cooler, the lower bearing bracket assembling comprises lower guide metal at least, support pin of spherical end, cushion block, insulating press boards, insulating pad, under lead seal cover, the lower bearing bracket welding processing, the basis wedge, soleplate, insulating press boards, following Oil Guide cooler and following Oil Guide dish, thrust bearing comprises at least, ring key, thrust runner, the oil groove lid, runner plate, the thrust bearing oil cooler, pillar screw, thrust metal, pallet, the retaining oil pipe, lockplate, thrust bearing oil sump, seal cover and solid plate, the stator assembling comprises the stator core assembling at least, the assembling of copper ring lead-in wire, the assembling of end hoop, insulation booth, upper coil, inner coil, switchboard, insulation booth is filled glue and switchboard insulation booth, the rotor assembling comprises main shaft at least, the rotor leading wire assembling, rotor field spider, deep bead, the card key, the yoke assembling, the magnetic pole assembling, vent segment, braking ring, lock washer with tongue at outside, adjust pad and balancing weight, it is characterized in that:
The pole coil of rotor assembling adopts copper bar four welded corner joint structures and is provided with the heat radiation circle, radiating condition is improved, effectively reduce 6-8 ℃ of coil temperature rise, the pole end-plate boots portion at pole core two ends is awl row structure, magnetic pole is equipped with longitudinal and transverse damping winding, and the brace that adopts the multi-layer thin copper sheet to make between the damping ring connects, and damping ring designs between pole end-plate and pole core, rotor yoke is provided with the rotation choke plate in two ends up and down, and last induced draft plate and following induced draft plate are glass fibre reinforced plastic structure; Non-concentric watt of top guide bearing in the upper bracket centerbody watt employing is equipped with the support pin of spherical end that radial load can be passed to upper bracket between watt back of the body and seat ring, the spherical support of support pin of spherical end is on cushion block; Non-concentric watt of lower guide bearing in the lower bearing bracket centerbody watt employing is equipped with the support pin of spherical end that radial load can be passed to lower bearing bracket between watt back of the body and seat ring.
Aerial cooler is that dual path is to the self-loopa aerial cooler.
Configuration electric heater in the generator machine hole is in order to avoid the generator outage insulation is made moist and generator can be put into operation at any time.
Upper and lower guide bearing of generator and thrust bearing are equipped with suction mist of oil device, in case the mist of oil diffusion.
Be provided with ground connection carbon brush and shaft current warning device at lower bearing bracket and generator main between centers.
The radial thermal expansion of stator core is provided with the 0.5mm radial clearance during for the adaptation unit operation between stator sector piece and the positioning bar.
The upper and lower side of the pole coil of rotor assembling is provided with integral die spirality insulation supporting plate, and is hot pressed into one with coil, and the mechanical performance of magnetic pole and electric overall performance are greatly improved.
The out frame upper and lower side is designed to style of opening, realizes end return air.
The advantage of a kind of high speed large capacity hydroelectric generator group described in the utility model is: adopted rotation choke plate, fiberglass induced draft plate, no fan structure, pole coil to adopt technology and new constructions such as copper bar four welded corner joints heat radiation circle, conical magnet poles pressing plate, the novel fixed form of damping ring, guide bearing gasket type support pin of spherical end in this generating set design, the ventilation and heat performance of generating set is good, spinner velocity fast, power output reaches more than the 50MW.
Description of drawings
Fig. 1 generating set overall structure schematic diagram
Fig. 2 generating set stator structure schematic diagram
Fig. 3 electric generating set rotor structural representation
Fig. 4 generating set thrust bearing structural representation
Fig. 5 generating set upper bracket structural representation
Fig. 6 generating set lower bearing bracket structural representation
Among the figure, 1-stores up on the basis, the assembling of 2-upper cover plate, 3-jack and shear pin assembling, the last deep bead assembling of 4-, the assembling of 5-upper bracket, the last induced draft plate assembling of 6-, the assembling of 7-overhead guard, the assembling of 8-slip ring cover, 9-collector ring and brush holder assembling, the assembling of 10-thrust bearing, the assembling of 11-rotor, the assembling of 12-lower bearing bracket, 13-brake piping, the assembling of 14-lower cover, the assembling of 15-dust catcher, 16-electric heater, the assembling of 17-fire main, induced draft plate assembling under the 18-, the assembling of 19-stator, 20-aerial cooler, the assembling of 21-stator core, the assembling of 22-copper ring lead-in wire, the assembling of 23-end hoop, the 24-insulation booth, 25-upper coil, 26-inner coil, the 27-switchboard, the 28-insulation booth is filled glue, 29-switchboard insulation booth, 30-main shaft, the assembling of 31-rotor leading wire, the 32-rotor field spider, 33-deep bead, 34-card key, 35-yoke pressing plate, the 36-yoke fastens screw rod, the assembling of 37-magnetic pole, 38-magnet yoke blanking sheet, the 39-vent segment, the 40-braking ring, the 41-lock washer with tongue at outside, 42-adjusts pad, the 43-balancing weight, the 44-ring key, 45-thrust runner, 46-oil-proof rubber bar, 47-oil groove lid, the 48-runner plate, 49-thrust bearing oil cooler, 50-pillar screw, the 51-thrust metal, the 52-pallet, 53-keeps off oil pipe, 54-lockplate, the 55-thrust bearing oil sump, the 56-seal cover, the solid plate of 57-, the processing of 58-upper bracket, the assembling of 59-cover plate, the 60-taper bolt, 61-oil-proof rubber bar is led seal cover on the 62-, the assembling of 63-top guide bearing, the 64-oil seal ring, 65-upper oil-pan, 66-oil cooler, the 67-lower guide metal, the 68-support pin of spherical end, 69-cushion block, 70-insulating press boards, the 71-insulating pad, lead seal cover under the 72-, 73-oil-proof rubber bar, 74-taper bolt, 75-lower bearing bracket welding processing, 76-basis wedge, 77-soleplate, 78-insulating press boards, Oil Guide cooler under the 79-, Oil Guide dish under the 80-.
Embodiment
Further describe the technical solution of the utility model below in conjunction with accompanying drawing: as Fig. 1, a kind of high speed large capacity hydroelectric generator group, comprise the hydraulic turbine, generator, generator comprises grain bin, basis 1 at least, upper cover plate assembling 2, jack and shear pin assembling 3, last deep bead assembling 4, upper bracket assembling 5, last induced draft plate assembling 6, overhead guard assembling 7, slip ring cover assembling 8, collector ring and brush holder assembling 9, thrust bearing assembling 10, rotor assembling 11, lower bearing bracket assembling 12, brake piping 13, lower cover assembling 14, dust catcher assembling 15, electric heater 16, fire main assembling 17, following induced draft plate assembling 18, stator assembling 19, aerial cooler 20, generator is the vertical shaft suspension type, dual path is to self-loopa aerial cooler three-phase synchronous generator, adopt controllable silicon microcomputer excitation, last induced draft plate and following induced draft plate are glass fibre reinforced plastic structure.Generator has upper and lower two guide bearings, assembles 5 centerbodies and lower bearing bracket assembles in 12 centerbodies at upper bracket respectively.Thrust bearing 10 is positioned at upper bracket and assembles 5 tops.
As Fig. 2, the generator unit stator assembling comprises stator core assembling 21, copper ring lead-in wire assembling 22, holds hoop assembling 23, insulation booth 24, upper coil 25, inner coil 26, switchboard 27, insulation booth to fill glue 28, switchboard insulation booth 29, electricity generator stator stand places on the interior soleplate of 6 concrete buttress, soleplate and support Bolt Connection, and it is tangentially spacing with radial peg, entad displacement during the support thermal expansion, the out frame upper and lower side is designed to style of opening, realizes end return air.The stator core internal diameter is Φ 4830mm, allows lower bearing bracket and water-turbine top cover integral body to hang out.
As Fig. 3, the generator amature assembling comprises that main shaft 30, rotor leading wire assembling 31, rotor field spider 32, deep bead 33, card key 34, yoke pressing plate 35, yoke fasten screw rod 36, magnetic pole assembling 37, magnet yoke blanking sheet 38, vent segment 39, braking ring 40, lock washer with tongue at outside 41, adjust pad 42, balancing weight 43.Pole coil adopts copper bar four welded corner joint structures and has the heat radiation circle, the pole end-plate boots portion at pole core two ends is awl row structure, magnetic pole is equipped with longitudinal and transverse damping winding, the damping ring design is between pole end-plate and pole core, the brace that adopts the multi-layer thin copper sheet to make between the damping ring connects, the upper and lower side of pole coil is provided with integral die spirality insulation supporting plate, and is hot pressed into one with coil.Yoke is provided with the rotation choke plate in two ends up and down, the generator amature assembling is the part of axle system and ventilating system, axle system is made up of generator amature body, generator's motor shaft, hydraulic turbine macro-axis and runner, and rotor field spider, yoke and magnetic pole constitute the pressure source of radial ventilation.
As Fig. 4, the generator thrust bearing dress comprises ring key 44, thrust runner 45, oil-proof rubber bar 46, oil groove lid 47, runner plate 48, thrust bearing oil cooler 49, pillar screw 50, thrust metal 51, pallet 52, retaining oil pipe 53, lockplate 54, thrust bearing oil sump 55, seal cover 56, solid plate 57.Thrust bearing is contained on the upper bracket, thrust bearing total load 385t.
As Fig. 5, generator upper bracket assembling comprise upper bracket processing 58, cover plate assembling 59, taper bolt 60, oil-proof rubber bar 61, on lead seal cover 62, top guide bearing assembling 63, oil seal ring 64, upper oil-pan 65, oil cooler 66.Non-concentric watt of top guide bearing in the upper bracket centerbody watt employing, between watt back of the body and seat ring, the support pin of spherical end that radial load can be passed to upper bracket is housed, be provided with 6 jack and shear pin device between upper bracket and basis, the radial load that produces when bearing unit operation is protected simultaneously and is expanded the basis.
As Fig. 6, generator lower bearing bracket assembling comprises lower guide metal 67, support pin of spherical end 68, cushion block 69, insulating press boards 70, insulating pad 71, leads seal cover 72, oil-proof rubber bar 73, taper bolt 74, lower bearing bracket welding processing 75, basic wedge 76, soleplate 77, insulating press boards 78, Oil Guide cooler 79, Oil Guide dish 80 down down down.Non-concentric watt of lower guide bearing in the lower bearing bracket centerbody watt employing is equipped with the support pin of spherical end that radial load can be passed to lower bearing bracket between watt back of the body and seat ring.
Generator adopts mechanical braking, but brake double as jack is used.Air pressure is 0.5-0.7MPa during braking, and jack-up rotor oil pressure is 8.6Mh.Per two brakes are furnished with a dust catcher.Between lower bearing bracket and generator's motor shaft, be provided with ground connection carbon brush and shaft current warning system.
Configuration electric heater in the generator machine hole is in order to avoid the generator outage insulation is made moist and generator can be put into operation at any time.
Upper and lower guide bearing of generator and thrust bearing are equipped with suction mist of oil device, in case the mist of oil diffusion.
The technical indicator that a kind of high speed large capacity hydroelectric generator group described in the utility model can reach is as follows:
Rated power: 50MW
Rated voltage: 10.5KV
Rated current: 3234.5A
Rated speed: 272.7 rev/mins
Runaway speed: 550 rev/mins
Rated power factor: 0.85 (hysteresis)
The number of phases: 3
Stator winding: Y-connection, central point is through grounding through arc
The class of insulation: F level
Rated efficiency: 97.7%.
Claims (10)
1, a kind of high speed large capacity hydroelectric generator group, comprise the hydraulic turbine, generator, generator comprise basis grain bins, upper cover plate assembling, jack with the shear pin assembling, go up deep bead assembling, upper bracket assembling, go up induced draft plate assembling, overhead guard assembling, slip ring cover assembling, collector ring are assembled with brush holder assembling, thrust bearing assembling, rotor assembling, lower bearing bracket assembling, brake piping, lower cover, dust catcher assembles, fire main assembles, following induced draft plate assembles, stator assembles and aerial cooler, wherein:
Upper bracket assembling comprise upper bracket processing, cover plate assembling, on lead seal cover, top guide bearing assembling, oil seal ring, upper oil-pan and oil cooler;
Lower bearing bracket assembling comprises lower guide metal, support pin of spherical end, cushion block, insulating press boards, insulating pad, leads seal cover, lower bearing bracket welding processing, basic wedge, soleplate, insulating press boards, Oil Guide cooler and following Oil Guide dish down down;
Thrust bearing comprises, ring key, thrust runner, oil groove lid, runner plate, thrust bearing oil cooler, pillar screw, thrust metal, pallet, retaining oil pipe, lockplate, thrust bearing oil sump, seal cover and solid plate;
The stator assembling comprises stator core assembling, the assembling of copper ring lead-in wire, holds hoop assembling, insulation booth, upper coil, inner coil, switchboard, insulation booth to fill glue and switchboard insulation booth;
The rotor assembling comprises main shaft, rotor leading wire assembling, rotor field spider, deep bead, card key, yoke assembling, magnetic pole assembling, vent segment, braking ring, lock washer with tongue at outside, adjustment pad and balancing weight, it is characterized in that:
The pole coil of rotor assembling adopts copper bar four welded corner joint structures, and the pole end-plate boots portion at pole core two ends is awl row structure, and magnetic pole is equipped with longitudinal and transverse damping winding, and yoke is provided with the rotation choke plate in two ends up and down; Non-concentric watt of top guide bearing in the upper bracket centerbody watt employing is equipped with the support pin of spherical end that radial load can be passed to upper bracket between watt back of the body and seat ring; Non-concentric watt of lower guide bearing in the lower bearing bracket centerbody watt employing is equipped with the support pin of spherical end that radial load can be passed to lower bearing bracket between watt back of the body and seat ring.
2, a kind of high speed large capacity hydroelectric generator group according to claim 1, it is characterized in that: described aerial cooler is that dual path is to the self-loopa aerial cooler.
3, a kind of high speed large capacity hydroelectric generator group according to claim 1 is characterized in that: the generator machine disposes electric heater in the hole.
4, a kind of high speed large capacity hydroelectric generator group according to claim 1, it is characterized in that: upper and lower guide bearing of generator and thrust bearing are equipped with suction mist of oil device.
5, a kind of high speed large capacity hydroelectric generator group according to claim 1 is characterized in that: going up induced draft plate and following induced draft plate is glass fibre reinforced plastic structure.
6, a kind of high speed large capacity hydroelectric generator group according to claim 1 is characterized in that: be provided with ground connection carbon brush and shaft current warning device at lower bearing bracket and generator main between centers.
7, a kind of high speed large capacity hydroelectric generator group according to claim 1, it is characterized in that: pole coil has the heat radiation circle.
8, a kind of high speed large capacity hydroelectric generator group according to claim 1 is characterized in that: damping ring designs between pole end-plate and pole core, and the brace that adopts the multi-layer thin copper sheet to make between the damping ring connects.
9, a kind of high speed large capacity hydroelectric generator group according to claim 1 is characterized in that: the upper and lower side of the pole coil of rotor assembling is provided with integral die spirality insulation supporting plate, and is hot pressed into one with coil.
10, a kind of high speed large capacity hydroelectric generator group according to claim 1, it is characterized in that: the out frame upper and lower side is designed to style of opening, realizes end return air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200350364U CN2927473Y (en) | 2006-07-25 | 2006-07-25 | Medium-high speed large-capacity hydraulic-turbine generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200350364U CN2927473Y (en) | 2006-07-25 | 2006-07-25 | Medium-high speed large-capacity hydraulic-turbine generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2927473Y true CN2927473Y (en) | 2007-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200350364U Expired - Lifetime CN2927473Y (en) | 2006-07-25 | 2006-07-25 | Medium-high speed large-capacity hydraulic-turbine generator set |
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| CN (1) | CN2927473Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452622C (en) * | 2006-07-25 | 2009-01-14 | 四川东风电机厂有限公司 | Medium and high speed large capacity hydroelectric generator |
| CN101136568B (en) * | 2007-10-08 | 2011-08-17 | 南阳防爆集团有限公司 | Cooling system of high capacity synchronous generator |
| CN102447339A (en) * | 2010-10-12 | 2012-05-09 | 哈尔滨电机厂有限责任公司 | Hydraulic generator guide bearing frame bearing structure |
| CN103036389A (en) * | 2012-05-24 | 2013-04-10 | 哈尔滨电机厂有限责任公司 | Vertical impulse generator set structure |
| CN107269456A (en) * | 2017-08-08 | 2017-10-20 | 天津亿诺电气设备有限公司 | Ocean energy turbine-generator units |
| CN108092462A (en) * | 2018-01-11 | 2018-05-29 | 西华大学 | Cooling structure inside and outside a kind of salient pole synchronous electric machine confluence annular lead wire copper ring |
| EP3544152A1 (en) * | 2018-03-21 | 2019-09-25 | Andritz Hydro GmbH | Water power generator with flexible stator fixing |
| CN114285233A (en) * | 2021-11-18 | 2022-04-05 | 中国长江动力集团有限公司 | Vertical shaft suspension type hydraulic generator mounting platform |
-
2006
- 2006-07-25 CN CNU2006200350364U patent/CN2927473Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452622C (en) * | 2006-07-25 | 2009-01-14 | 四川东风电机厂有限公司 | Medium and high speed large capacity hydroelectric generator |
| CN101136568B (en) * | 2007-10-08 | 2011-08-17 | 南阳防爆集团有限公司 | Cooling system of high capacity synchronous generator |
| CN102447339A (en) * | 2010-10-12 | 2012-05-09 | 哈尔滨电机厂有限责任公司 | Hydraulic generator guide bearing frame bearing structure |
| CN103036389A (en) * | 2012-05-24 | 2013-04-10 | 哈尔滨电机厂有限责任公司 | Vertical impulse generator set structure |
| CN107269456A (en) * | 2017-08-08 | 2017-10-20 | 天津亿诺电气设备有限公司 | Ocean energy turbine-generator units |
| CN108092462A (en) * | 2018-01-11 | 2018-05-29 | 西华大学 | Cooling structure inside and outside a kind of salient pole synchronous electric machine confluence annular lead wire copper ring |
| CN108092462B (en) * | 2018-01-11 | 2023-07-28 | 西华大学 | Inner and outer cooling structure of annular lead copper ring of salient pole synchronous motor confluence |
| EP3544152A1 (en) * | 2018-03-21 | 2019-09-25 | Andritz Hydro GmbH | Water power generator with flexible stator fixing |
| CN114285233A (en) * | 2021-11-18 | 2022-04-05 | 中国长江动力集团有限公司 | Vertical shaft suspension type hydraulic generator mounting platform |
| CN114285233B (en) * | 2021-11-18 | 2023-01-13 | 中国长江动力集团有限公司 | Vertical shaft suspension type hydraulic generator mounting platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20060725 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |