CN108418073A - A kind of large-sized water turbine generator collector ring connection structure and welding method - Google Patents
A kind of large-sized water turbine generator collector ring connection structure and welding method Download PDFInfo
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- CN108418073A CN108418073A CN201810103402.2A CN201810103402A CN108418073A CN 108418073 A CN108418073 A CN 108418073A CN 201810103402 A CN201810103402 A CN 201810103402A CN 108418073 A CN108418073 A CN 108418073A
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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
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/02—Seam welding
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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
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0263—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for positioning or holding parts during soldering or welding process
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/10—Connectors or connections adapted for particular applications for dynamoelectric machines
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
A kind of large-sized water turbine generator collector ring connection structure of present invention offer and welding method, connection structure includes connecting tube, the both ends of connecting tube are separately positioned in two collector rings to be connected, circular weld tab is equipped at the interface of two collector rings to be connected, circular weld tab is sleeved in connecting tube, connecting tube both ends are equipped with axis neck, axis, which is led, to be coordinated or is interference fitted with collector ring transition to be connect, connecting tube is located at part and collector ring clearance fit to be connect between two axis necks, it is equipped with stuffing hole on two collector rings to be connected, the stuffing hole is arranged is located at the upper between two axis necks in connecting tube.Welding method is welded using Medium frequency induction.The connection structure and welding method make solder uniformly fill gap between collector ring and connector, while preventing solder from leaking to form burr, and weld seam is full solid, and welding quality is high.
Description
Technical field
The present invention relates to large-sized water turbine generator apparatus field, more particularly to a kind of large-sized water turbine generator collector ring connection
Structure and welding method.
Background technology
Existing hydrogenerator collector ring connection structure is the company of installation inside two collector ring docking locations to be connected
It takes over, seam crossing places silver soldering piece, and Medium frequency induction is welded.The major defect of the structures and methods has：（1）Wait for connection confluence
When being interference fitted between ring and connecting tube, inner air cannot exclude, and solder cannot be filled up completely collector ring to be connected and connect
Gap between pipe, leads to rosin joint, increases the contact resistance of weld seam；（2）When connecting clearance fit between collector ring and connecting tube,
Solder is leaked along fit clearance to be lost in, and is formed burr, wedge angle inside collector ring to be connected, is produced in generator operation
The shelf depreciation of raw high-energy causes generator local discharge monitoring system wrong report；（3）In welding process, collector ring to be connected
There is no temperature protection measure, welding heat to be conducted to neighbouring main insulating layer by pipe fitting, makes its heated flavescence or blackening, it is main exhausted
The insulation performance of edge is greatly lowered；（4）The mechanical strength of collector ring connection structure is low, vibrates weld seam for a long time and is easy cracking；
（5）Collector ring connection structure section current density is big, and local pyrexia amount is high, shortens the longevity of collector ring connection structure surface insulation layer
Life.
Invention content
Technical problem to be solved by the invention is to provide a kind of large-sized water turbine generator collector ring connection structure and welding
Method makes solder uniformly fill gap between collector ring to be connected and connecting tube by the design of connecting pipe structure, eliminates welding fluid
Interior leakage forms burr, wedge angle, and weld seam is full solid, and welding quality is high.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of large-sized water turbine generator collector ring connection
The both ends of structure, including connecting tube, connecting tube are separately positioned in two collector rings to be connected, pair of two collector rings to be connected
Circular weld tab is equipped at junction, circular weld tab is sleeved in connecting tube, and connecting tube both ends are equipped with axis neck, and axis is led and waits connecting remittance
Ring transition cooperation or interference fit are flowed, connecting tube is located at part and collector ring clearance fit to be connect between two axis necks,
Stuffing hole is equipped on two collector rings to be connected, the stuffing hole, which is arranged, to be located in connecting tube on the part between two axis necks
Side.
In preferred scheme, the connection pipe outer wall being located between two axis necks is equipped with solder channel, and stuffing hole is located at solder
Above channel, the solder channel includes two first annular slots and at least two second annular grooves, and first annular slot, which is located at, to be filled out
Expect the lower section in hole, between first annular slot and axis neck, first annular slot and the second annular groove pass through at least the second annular groove
Straight line slot is connected to.
In further embodiment, the bottom surface of the solder channel is cambered surface, and the top width of solder channel is 1mm~3mm,
Depth is 0.5mm~1mm, and the depth of first annular slot is more than the depth of the second annular groove and straight-line groove.
In preferred scheme, the connection pipe outer wall is equipped with two location holes, and the location hole is corresponding with stuffing hole.
In further embodiment, the bottom of the location hole is cone, a diameter of 2mm of the stuffing hole and location hole
~3mm.
In preferred scheme, the connecting tube is located between the part between two axis necks and the unilateral cooperation of collector ring to be connected
Gap is 0.1mm~0.2mm.
In preferred scheme, the internal diameter of the circular weld tab is bigger 0.2mm~0.5mm than the outer diameter of connecting tube, and outer diameter ratio waits for
Big 1mm~the 2mm of outer diameter of collector ring is connected, circular weld tab both sides are less than 0.2mm with the gap of collector ring end to be connect.
The present invention also provides a kind of welding methods of large-sized water turbine generator collector ring connection structure, include the following steps：
One, welding preparation：
A, the oxide and spot of connecting tube and collector ring inner wall to be connected and outer surface are cleared up；
B, positioning pin is inserted into stuffing hole and location hole carries out docking assembly, check the seam of circular weld tab and collector ring to be connect
Gap with fixture fixes collector ring to be connected after qualified, and extracts positioning pin；
C, high pure nitrogen is passed through inside two collector rings to be connected as welding protection gas；
Two, implement Medium frequency induction welding：
A, the cooling water band for being connected with recirculated cooling water is wrapped in the non-solder area of two collector rings to be connected, cooling water band is close
The distance of one lateral extent connecting tube end face of connecting tube is 100 ~ 200mm, and the cover width of cooling water band is greater than or equal to
100mm；
B, movable welding fume purifying apparatus is opened, dust absorption arm angle is adjusted；
C, each water path valve is adjusted, the cooling water flow velocity of 7 branch of cooling water band is more than 30dl/min, the cooling flow of electrode holder branch
Speed is more than 200dl/min；
D, the induction coil of Medium frequency induction welding machine is clamped on two collector rings to be connected；
E, gradually adjust Medium frequency induction welder power to 50 ~ 60kW, collector ring connect be heated to Chinese red, connecting tube with wait for
It is 720 DEG C~760 DEG C to connect collector ring temperature, which controls in 15s~20s；
F, after connecting collector ring and being heated to Chinese red, Medium frequency induction welding machine is changed to crawl by continuous heating and heats, when heating
Between be 3s, interval time 3s；
G, silver-bearing copper welding rod is leaned against respectively in two stuffing holes, the diameter of silver-bearing copper welding rod is less than the aperture of stuffing hole, two fillers
Stop addition solder after filling solder in hole；I, welding terminates, and gradually reduces welding machine output power to zero；
Three, after welding treatment：
A, after welding, induction coil is removed, when the temperature for connecting collector ring is reduced to 500 DEG C or less, unclamps fixture；
B, the temperature of collector ring to be connected be reduced to 120 DEG C hereinafter, close cooling water valve, close Medium frequency induction welding machine electric power,
Cooling water band is removed, stopping is passed through nitrogen, and burr, wedge angle and the oxide on cleaning collector ring connection structure surface check weldering
Stitch quality.
In preferred scheme, in the welding preparation stage, before step a, anaerobic annealing is carried out to connecting tube.
In preferred scheme, frequency induction welding stage in force, in step g, the diameter of silver-bearing copper welding rod is less than stuffing hole
Diameter, silver-bearing copper welding rod slant setting in stuffing hole, press silver-bearing copper welding rod, so that it is contacted with collector ring to be connected, work as solder
Flow velocity obviously becomes time slack, stops adding solder in a stuffing hole thereto, continues to continue to add solder to another stuffing hole,
Until stopping addition after filling solder in two stuffing holes, solder is supplemented in the interface of two collector rings to be connected.
A kind of large-sized water turbine generator collector ring connection structure and welding method provided by the invention have below beneficial to effect
Fruit：
1, the tight fit realized between connecting tube and collector ring to be connected is led by axis, meanwhile, connecting tube is in two end axles and leads it
Between part and collector ring to be connected between have certain gap, solder that can flow freely blind, and in being not in
Leakage forms burr, wedge angle, causes that shelf depreciation occurs；Meanwhile weld seam is full, avoids rosin joint and solder skip phenomenon, solder utilizes
Rate increases substantially, and the weld heating time shortens, and has higher reliability and economy.
2, connection pipe outer wall is equipped with the netted solder channel of connection, and solder is filled along solder channel bottom-up between inside
Gap；Meanwhile inner air is discharged by solder channel along stuffing hole, weld seam is full solid, and welding quality is high.Specifically, solder
Channel includes the first annular slot, the second annular groove and straight-line groove interconnected, wherein first annular slot is corresponding with stuffing hole, the
The depth and width of one annular groove are all higher than the depth and width of the second annular groove and straight-line groove, and solder is flowed into along stuffing hole, warp
First annular slot goes directly internal clearance bottom, with the continuous addition of solder, gradually filling internal clearance, straight-line groove from the bottom up
And second annular groove etc., the air of internal clearance are in the solder upper layer of filling, are discharged by stuffing hole always.
3, the connection structure weld seam area increases, and reduces the contact resistance of collector ring connection structure, and fever is reduced, and is extended
Collector ring connection structure external insulation service life.
4, entirety is formed after the welding of collector ring connection structure, improves the intensity of collector ring connection structure, entire collector ring
Cope with electrodynamic ability higher.
5, stuffing hole is inserted by pin and location hole carries out preassembling, can preferably control two collector rings to be connected
The gap size of end face is docked, while realizing the quick positioning of connecting tube.
6, the non-solder area major insulation that collector ring to be connected is wrapped up with cooling water band, the heat avoided in welding process pass
Lead the destruction to major insulation.
7, this connection structure is simple, and mounting process difficulty is low, and work efficiency is high.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the overall structure diagrammatic cross-section of the present invention.
Fig. 2 is the schematic cross-section in the faces A-A in Fig. 1.
Fig. 3 is the schematic cross-section in the faces B-B in Fig. 1.
Fig. 4 is the schematic cross-section in the faces C-C in Fig. 1.
Fig. 5 is the schematic cross-section in the faces D-D in Fig. 1.
Fig. 6 is the structural schematic diagram of the connecting tube of the present invention.
Fig. 7 is the welding schematic diagram of the present invention.
In figure：Connecting tube 1, collector ring 2 to be connected, circular weld tab 3, first annular slot 4, the second annular groove 5, straight-line groove 6,
Cooling water band 7, induction coil 8, axis neck 9, location hole 10, stuffing hole 11.
Specific implementation mode
In Fig. 1~6, a kind of large-sized water turbine generator collector ring connection structure, including connecting tube 1, the both ends of connecting tube 1
It is separately positioned in two collector rings 2 to be connected, connecting tube 1 and 2 material of collector ring to be connected are red copper, and two are waited for connection confluence
Circular weld tab 3 is equipped at the interface of ring 2, circular weld tab 3 is sleeved in connecting tube 1, and 1 both ends of connecting tube are equipped with axis neck 9, axis
Neck 9 is symmetrical along circular weld tab 3, and axis neck 9 coordinates or is interference fitted with 2 transition of collector ring to be connect, the outer end face of axis neck 9
Chamfering is set, the installation of entire connecting tube 1 is conducive to.
It is 0.1mm that the connecting tube 1, which is located at the part between two axis necks 9 with 2 unilateral fit clearance of collector ring to be connect,
~0.2mm.Above-mentioned size selection ensures the capillary absorption effect of solder, while taking into account solder in internal mobility.
The internal diameter of the circular weld tab 3 is bigger 0.2mm~0.5mm than the outer diameter of connecting tube 1, outer diameter ratio collector ring 2 to be connected
The big 1mm~2mm of outer diameter, 3 both sides of circular weld tab and the gap of collector ring end 2 to be connect are less than 0.2mm.Above-mentioned dimensional fits
It can ensure that weld seam is full, solder is avoided excessively to form overlap, insufficient solder connection leads to the pit that secondary filler repair welding is formed.
Connecting tube 1 is located at two axis and leads part and 2 clearance fit of collector ring connect between 9, be located at two axis necks 9 it
Between 1 outer wall of connecting tube be equipped with solder channel, solder channel include two first annular slots 4 and at least two second annular grooves 5,
In the present embodiment, the quantity of the second annular groove 5 is two, adjacent with the inner face of axis neck 9 respectively, first annular slot 4 and the
Second ring slot 5 is connected to by four straight-line grooves 6, and the straight-line groove 6 is distributed along the even circumferential of connecting tube 1.Above-mentioned groove is netted
Connection composition solder channel, when stuffing hole 11 injects solder, inner air is discharged through netted groove.
The bottom surface of solder channel is cambered surface, and top width is 1mm~3mm, and depth is 0.5mm~1mm, and first annular
The depth of slot 4 is more than the depth of the second annular groove 5 and straight-line groove 6.Above-mentioned dimensional fits both can guarantee solder in solder channel
It flows freely, and can guarantee that inner air is discharged in time, the excessively thermally-induced stuffing hole welding fluid of air entrapment in welding process is avoided to fly
It splashes.
It is equipped with stuffing hole 11 on two collector rings 2 to be connected, the stuffing hole 11 is symmetrical along circular weld tab 3.
First annular slot 4 is equipped with location hole 10, and location hole 10 is corresponding with stuffing hole 11.Two collector rings 2 to be connected
When docking, the stress of all directions is inevitably will produce, shop bolt must have some strength, therefore, the filler
A diameter of 2mm~3mm in hole 11 and location hole 10.
In the present embodiment, 10 bottom of location hole be cone, due to collector ring 2 connect be arc, length for 3m~
Often not on an axis, there is offset dislocation in 5m, therefore connection structure is in assembly, stuffing hole 11 and location hole 10.Cone
Shape hole can allow the adaptive partial offset amount of positioning pin, reduce the gap of circular weld tab 3 and 2 end face of collector ring to be connect.
To better illustrate welding method, in the present embodiment, Medium frequency induction welding machine is MINAC 70/110, continuous heating
Power is 70kW, and intermittent-heating power is 110kW, and ten grades of power is adjustable；The trade mark of 3 silver soldering piece of circular weld tab is B-Cu80PAg,
Thickness δ 0.2mm；The trade mark of silver-bearing copper welding rod is B-Cu80PAg, a diameter of φ 2mm.
The specific welding method of the collector ring connection structure of the present invention, includes the following steps：
One, welding preparation：
A, check whether the surface of connecting tube 1 and collector ring to be connected 2 has scratch, end face whether smooth；
B, anaerobic annealing is carried out to connecting tube 1；
C, the oxide and spot for clearing up connecting tube 1 and 2 inner wall of collector ring to be connected and outer surface are purged with pressure-air and are connected
Take over 1 and 2 inner wall of collector ring to be connected and outer surface, are further cleaned out with alcohol；
D, connecting tube 1, collector ring to be connected 2, circular weld tab 3 are assembled according to such as Fig. 7, and positioning pin is inserted into stuffing hole 11 and positioning
Hole 10 carries out docking assembly, checks that the gap of circular weld tab 3 and collector ring 2 to be connect, clearance gauge cannot be inserted into 0.2mm clearance gauges,
Collector ring 2 to be connected is fixed with fixture after qualification, and extracts positioning pin；
E, it is passed through high pure nitrogen inside two collector rings 2 to be connected as welding protection gas, two collector rings 2 to be connected are discharged
Inner air prevents connecting tube 1 and collector ring 2 to be connected in the welding process by thermal oxide.
Two, implement Medium frequency induction welding：
A, the cooling water band 7 for being connected with recirculated cooling water is wrapped in the non-solder area of two collector rings 2 to be connected, cooling water band 7
Inlet tube and outlet tube be connected to respectively with the inlet tube and outlet tube of Medium frequency induction welding machine cooling water, cooling water band 7 is close to the side of connecting tube 1
Distance apart from 1 end face of connecting tube is 150mm, and the cover width of cooling water band 7 is 100mm；
B, movable welding fume purifying apparatus is opened, dust absorption arm angle is adjusted；
C, Medium frequency induction welding machine electric power switch is opened, cooling water flow parameter is set, adjusts each water path valve, ensures cooling water band
The cooling water flow velocity of 7 branches is more than 30dl/min, and the cooling water flow velocity of electrode holder branch is more than 200dl/min, meets and waits for that connection converges
Flow the cooling requirement of 2 unheated zone of ring and electrode holder；
D, the induction coil 8 of Medium frequency induction welding machine is clamped on two collector rings 2 to be connected, the clip position of induction coil 8
It is symmetrical relative to circular weld tab 3；
E, the heater switch of Medium frequency induction welding machine electrode holder and holding are pressed, gradually adjust Medium frequency induction welder power export button to
Collector ring 2 to be connected is heated to Chinese red, connecting tube 1 and collector ring 2 to be connected by eighth speed, continuous output 56kW
Temperature is about 720 DEG C~760 DEG C, which controls in 15s~20s；
F, after connection collector ring 2 is heated to Chinese red, the heater switch of Medium frequency induction welding machine electrode holder is changed to by continuous heating
Crawl heats, heating time 3s, interval time 3s, and it is Chinese red to keep connecting tube 1 and collector ring 2 to be connected；
G, φ 2mm silver-bearing coppers welding rods being leaned against respectively in two φ 3mm stuffing holes 11, silver-bearing copper welding rod is in 45 ° of inclination angles with stuffing hole 11,
Silver-bearing copper welding rod is slightly pressed, it is made to be contacted with collector ring 2 to be connected, flowing into solder along stuffing hole 11 after the fusing of silver-bearing copper welding rod leads to
Road, the burn-off rate of silver-bearing copper welding rod is with the smooth inflow solder channel of solder and does not influence internal clearance air discharge and is advisable；
H, when solder flow velocity obviously becomes time slack, stop adding solder in a stuffing hole 11 thereto, continue to another filler
Hole 11 continues to add solder, until stopping addition solder after filling solder in two stuffing holes 11；Two collector rings 2 to be connected
Interface supplements solder, keeps interface smooth welding joint full；
I, welding terminates, and gradually reduces welding machine output power to zero, above-mentioned heating process total time control is within 2min.
Three, after welding treatment：
A, after welding, induction coil 8 is removed, when the temperature for connecting collector ring 2 is reduced to 500 DEG C or less, is unclamped in time
Fixture, natural cooling annealing eliminate the stress that welding generates；
B, the temperature of collector ring 2 to be connected be reduced to 120 DEG C hereinafter, close cooling water valve, close Medium frequency induction welding machine electric power,
Cooling water band 7 is removed, stopping is passed through nitrogen, cleans up the burr, wedge angle and oxide on collector ring connection structure surface in time,
Check weldquality.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the limitation for the present invention, this hair
Technical characteristic in the technical solution that bright protection domain should be recorded with claim, including the technical solution of claim record
Equivalents are protection domain.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of large-sized water turbine generator collector ring connection structure, it is characterised in that：Including connecting tube（1）, connecting tube（1）Two
End is separately positioned on two collector rings to be connected（2）It is interior, two collector rings to be connected（2）Interface at be equipped with circular weld tab
（3）, circular weld tab（3）It is sleeved on connecting tube（1）On, connecting tube（1）Both ends are equipped with axis neck（9）, axis neck（9）With wait connecting remittance
Flow ring（2）Transition coordinates or interference fit, connecting tube（1）It is led positioned at two axis（9）Between part and collector ring to be connect
（2）Clearance fit, two collector rings to be connected（2）On be equipped with stuffing hole（11）, the stuffing hole（11）It is arranged in connecting tube
（1）It is led positioned at two axis（9）Between upper.
2. a kind of large-sized water turbine generator collector ring connection structure according to claim 1, it is characterised in that：Positioned at two
Axis is led（9）Between connecting tube（1）Outer wall is equipped with solder channel, stuffing hole（11）Above solder channel, the solder is logical
Road includes two first annular slots（4）With at least two second annular grooves（5）, first annular slot（4）Positioned at stuffing hole（11）'s
Lower section, the second annular groove（5）Positioned at first annular slot（4）It is led with axis（9）Between, first annular slot（4）With the second annular groove（5）
Pass through at least one straight-line groove（6）Connection.
3. a kind of large-sized water turbine generator collector ring connection structure according to claim 2, it is characterised in that：The solder
The bottom surface in channel is cambered surface, and the top width of solder channel is 1mm~3mm, and depth is 0.5mm~1mm, and first annular slot
（4）Depth be more than the second annular groove（5）And straight-line groove（6）Depth.
4. a kind of large-sized water turbine generator collector ring connection structure according to claim 1, it is characterised in that：The connection
Pipe（1）Outer wall is set there are two location hole（10）, the location hole（10）With stuffing hole（11）It is corresponding.
5. a kind of large-sized water turbine generator collector ring connection structure according to claim 4, it is characterised in that：The positioning
Hole（10）Bottom be cone, the stuffing hole（11）And location hole（10）A diameter of 2mm~3mm.
6. a kind of large-sized water turbine generator collector ring connection structure according to claim 1, it is characterised in that：The connection
Pipe（1）It is led positioned at two axis（9）Between part and collector ring to be connect（2）Unilateral fit clearance is 0.1mm~0.2mm.
7. a kind of large-sized water turbine generator collector ring connection structure according to claim 1, it is characterised in that：The annular
Weld tabs（3）Internal diameter compare connecting tube（1）The big 0.2mm~0.5mm of outer diameter, outer diameter ratio collector ring to be connected（2）The big 1mm of outer diameter
~2mm, circular weld tab（3）Both sides and collector ring end to be connect（2）Gap be less than 0.2mm.
8. a kind of welding method of large-sized water turbine generator collector ring connection structure, it is characterised in that：Include the following steps：
One, welding preparation：
A, connecting tube is cleared up（1）With collector ring to be connected（2）The oxide and spot of inner wall and outer surface；
B, positioning pin is inserted into stuffing hole（11）And location hole（10）It is assembled to carry out docking, checks circular weld tab（3）With wait connecting
Collector ring（2）Gap, with fixture fix collector ring to be connected after qualified（2）, and extract positioning pin；
C, in two collector rings to be connected（2）Inside is passed through high pure nitrogen as welding protection gas；
Two, implement Medium frequency induction welding：
A, the cooling water band of recirculated cooling water will be connected with（7）It is wrapped in two collector rings to be connected（2）Non-solder area, cooling water
Band（7）Close to connecting tube（1）A lateral extent connecting tube（1）The distance of end face is 100 ~ 200mm, cooling water band（7）Covering
Width is greater than or equal to 100mm；
B, movable welding fume purifying apparatus is opened, dust absorption arm angle is adjusted；
C, each water path valve is adjusted, the cooling water flow velocity of 7 branch of cooling water band is more than 30dl/min, the cooling flow of electrode holder branch
Speed is more than 200dl/min；
D, by the induction coil of Medium frequency induction welding machine（8）It is clamped in two collector rings to be connected（2）On；
E, Medium frequency induction welder power is gradually adjusted to 50 ~ 60kW, by collector ring to be connected（2）It is heated to Chinese red, connecting tube
（1）With collector ring to be connected（2）Temperature is 720 DEG C~760 DEG C, which controls in 15s~20s；
F, when collector ring to be connected（2）After being heated to Chinese red, Medium frequency induction welding machine is changed to crawl by continuous heating and heats, heating
Time is 3s, interval time 3s；
G, silver-bearing copper welding rod is leaned against into two stuffing holes respectively（11）Interior, the diameter of silver-bearing copper welding rod is less than stuffing hole（11）Aperture,
Two stuffing holes（11）In fill and stop addition solder after solder；
I, welding terminates, and gradually reduces welding machine output power to zero；
Three, after welding treatment：
A, after welding, induction coil is removed（8）, collector ring to be connected（2）Temperature when being reduced to 500 DEG C or less, unclamp
Fixture；
B, collector ring to be connected（2）Temperature be reduced to 120 DEG C hereinafter, close cooling water valve, close Medium frequency induction welding machine electricity
Cooling water band is removed in source（7）, stop being passed through nitrogen, clear up burr, wedge angle and the oxide on collector ring connection structure surface,
Check weldquality.
9. a kind of welding method of large-sized water turbine generator collector ring connection structure according to claim 8, feature exist
In：In the welding preparation stage, before step a, to connecting tube（1）Carry out anaerobic annealing.
10. a kind of welding method of large-sized water turbine generator collector ring connection structure according to claim 8, feature exist
In：The frequency induction welding stage in force in step g, when solder flow velocity obviously becomes time slack, stops a stuffing hole thereto
（11）Interior addition solder, continues to another stuffing hole（11）Continue to add solder, until two stuffing holes（11）In fill weldering
Stop addition solder after material, in two collector rings to be connected（2）Interface supplement solder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103402.2A CN108418073B (en) | 2018-02-01 | 2018-02-01 | Collector ring connecting structure of large hydraulic generator and welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103402.2A CN108418073B (en) | 2018-02-01 | 2018-02-01 | Collector ring connecting structure of large hydraulic generator and welding method |
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| Publication Number | Publication Date |
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| CN108418073A true CN108418073A (en) | 2018-08-17 |
| CN108418073B CN108418073B (en) | 2020-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319688A (en) * | 2021-09-15 | 2022-11-11 | 中国长江电力股份有限公司 | Method for replacing built-in rubber gasket of welding type gas insulated line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1065954A (en) * | 1991-09-27 | 1992-11-04 | 贵州航空工业总公司贵阳电机厂 | The process for in-lay welding of armature or slip ring |
| US5726408A (en) * | 1995-06-07 | 1998-03-10 | The Babcock & Wilcox Company | Weld backing ring for nozzle repairs |
| CN203722019U (en) * | 2014-03-11 | 2014-07-16 | 南车成都机车车辆有限公司 | Slip ring wiring device |
| CN205660289U (en) * | 2016-05-09 | 2016-10-26 | 燕山大学 | Novel xenogenesis pipe butt welding induction heater |
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2018
- 2018-02-01 CN CN201810103402.2A patent/CN108418073B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065954A (en) * | 1991-09-27 | 1992-11-04 | 贵州航空工业总公司贵阳电机厂 | The process for in-lay welding of armature or slip ring |
| US5726408A (en) * | 1995-06-07 | 1998-03-10 | The Babcock & Wilcox Company | Weld backing ring for nozzle repairs |
| CN203722019U (en) * | 2014-03-11 | 2014-07-16 | 南车成都机车车辆有限公司 | Slip ring wiring device |
| CN205660289U (en) * | 2016-05-09 | 2016-10-26 | 燕山大学 | Novel xenogenesis pipe butt welding induction heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319688A (en) * | 2021-09-15 | 2022-11-11 | 中国长江电力股份有限公司 | Method for replacing built-in rubber gasket of welding type gas insulated line |
| CN115319688B (en) * | 2021-09-15 | 2024-04-16 | 中国长江电力股份有限公司 | Method for replacing built-in rubber gasket of welding type gas insulation circuit |
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| Publication number | Publication date |
|---|---|
| CN108418073B (en) | 2020-06-16 |
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