CN201799769U - Alternating current steel rail welding machine - Google Patents
Alternating current steel rail welding machine Download PDFInfo
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- CN201799769U CN201799769U CN2010205486155U CN201020548615U CN201799769U CN 201799769 U CN201799769 U CN 201799769U CN 2010205486155 U CN2010205486155 U CN 2010205486155U CN 201020548615 U CN201020548615 U CN 201020548615U CN 201799769 U CN201799769 U CN 201799769U
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Abstract
The utility model discloses an alternating current steel rail welding machine, which comprises a hydraulic pump, a generator, an engine, a single-phase transformer and a pair of welding electrodes, wherein the generator is driven by the engine, the hydraulic pump is driven by the generator, the generator is electrically connected with a primary winding of the single-phase transformer, a secondary winding of the single-phase transformer is electrically connected with the welding electrodes, and the engine comprises a speed regulator. The utility model is characterized in that the generator is a single-phase permanent magnetic generator and comprises a front input shaft and a back output shaft, the front input shaft is mechanically connected with a main shaft of the engine, and the back outlet shaft is mechanically connected with the hydraulic pump. The utility model has simple structure, and the configured engine power can be greatly reduced compared with that in the prior art, so energy can be saved, and the manufacture cost is low.
Description
Technical field
The utility model relates to the railway traffic engineering field, particularly rail welder, especially a kind of interchange rail welder.
Background technology
The high speed development of track traffic (high ferro, general iron, subway, light rail, heavy rail) has caused track machine matter height, has measured big demand, and wherein track laying adopts seamless welding procedure comprehensively, so that the high-quality track welding equipment of global wilderness demand.Based on cost, efficient and reliability, in the world at present the employing exchanges the flash of light welding procedures more, adopts single-phase transformer to be depressurized to directly butt-joint behind 6～7V, and the butt-joint current peak surpasses the training of 10 Wan An, and peak power surpasses 500KVA.Because preflashing, the upset stage of welding process, power supply is approximate to be produced very big dash current by short circuit, needs because of welding procedure must carry out pressure regulation/unsteady flow processing to input voltage in addition, normally adopt bidirectional thyristor to carry out phase-shift voltage regulating, thereby cause the power factor (PF) of power supply on the low side, and produce bigger harmonic current, thereby must the high performance power supply system of configuration.When being welded on fixing construction occasion, if by the power supply of city's electrical network, problem relatively easily solves.But track construction is mobile operating normally, thereby portable diesel-driven generator is conventional configuration.Excitation ability and adjusting function, reliability to the capacity of this movable type diesel-driven generator, impact resistance, voltage regulator all proposes higher requirement so.
In the prior art, in track construction, use maximum be rail welder structural representation as shown in Figure 2, adopt the Diesel engine of constant-speed operation to drag the three-phase alternating current excitation synchronous generator of constant voltage, constant frequency operation.Bidirectional thyristor by big electric current is connected with the elementary winding of the single-phase transformer of welding equipment, and the output current of welding is realized pressure regulation/unsteady flow by system program according to the angle of flow of technological requirement control bidirectional thyristor.Auxiliary hydraulic power is provided by the hydraulic pump that threephase motor drags.Owing to adopt IGCT to carry out phase-shift voltage regulating, phase-shifting chopped waves causes electric current to produce a large amount of higher hamonic waves, and higher harmonic components has limited the power output of transformer and generator, and causes associated components, device heating to produce loss.Phase-shift voltage regulating descends the power factor of generator in addition, further causes energy consumption to increase.In addition, a bigger technological deficiency is: welded by the direct step-down mode of single-phase transformer, it is simple to have equipment, the advantage that Chinese People's Anti-Japanese Military and Political College's short-circuit current rush ability is strong, but because this transformer is a single-phase operation, to common three phase mains, Chang Yong diesel-driven three-phase synchronous generator particularly, lacking one uses mutually, the optimum rate of utilization of motor has only 0.577, and single-phase asymmetric operation causes generator to produce a large amount of negative-sequence current and zero-sequence current, these negative-sequence currents and zero-sequence current can increase the power attenuation and the vibrations of generator greatly, have reduced the efficient and the service life of generator.Common synchronous generator must adopt automatic voltage regulator to carry out excitation/output voltage and regulate.(transformer output is approximate by short circuit when being welded on the preflashing stage, with the input power of demand more than three times), generator is surpassed 100% load by impact, because the hysteresis of adjustment of field excitation electric current, generator output voltage will inevitably produce bigger transient state drop deviation, and (transient deviation is greater than-30%, 1～2 second recovery time), the welding quality that causes glistening descends.In order to improve the success rate of welding, normally apolegamy is the generator of 3 times of capacity of single-phase transformer (for example: 50% arcing time factor designs, and the welding transformer of 250KVA, polygamy are put the generator of 750KVA～1000KVA).The power of generator selects big, and the engine that drags also must strengthen dispensing power simultaneously, and energy consumption, volume and the cost of system have also increased simultaneously certainly.
Existing mobile steel rail welding machine has defectives such as complex structure, energy consumption is big, cost is high, volume is big.
The utility model content
The utility model provides a kind of energy consumption low interchange rail welder at the deficiencies in the prior art.
A kind of interchange rail welder comprises hydraulic pump, generator, engine and single-phase transformer and a pair of welding electrode; Generator is by motor driven, hydraulic pump is by generator drive, the elementary winding of generator and single-phase transformer is electrically connected, the secondary windings and the welding electrode of single-phase transformer are electrically connected, engine comprises speed regulator, it is characterized in that: generator is the single-phase permanent generator, power shaft and rear output shaft before comprising, preceding power shaft is connected rear output shaft and hydraulic pump mechanical connection with the spindle machine of engine.
Further, also comprise the current transformer and the electric current-speed regulator of the electric current of the elementary winding that is used to detect single-phase transformer, current transformer and electric current-speed regulator are electrically connected, and electric current-speed regulator and speed regulator are electrically connected.Speed regulator is controlled by electric current-speed regulator, and electric current-speed regulator is controlled speed regulator according to the electric current that current transformer detects, and realizes electric current/speed closed loop adjusting.
Further, described electric current-speed regulator is the PID adjuster of regulating with electric current/speed closed loop.
Further, also comprise flywheel, flywheel is located at the preceding power shaft of generator usually, also can be located at the rear output shaft of generator, also can a flywheel respectively be set simultaneously at the preceding power shaft and the rear output shaft of generator.Further, described flywheel is a steel accumulation of energy flying wheel.
Further, described engine is diesel engine or gas engine.
The speed regulator that is disposed in the engine is generally Electronic Control speed regulator or EFI control speed regulator.
Terminal welding procedure of the present utility model still adopts the mode of being carried out the rail flash welding by the direct step-down of single phase industrial frequence transformer, but the generator of power supply has adopted powerful single-phase permanent generator, because of the output voltage and the rotating speed of magneto linear, rotating speed by the programme-control engine can reach accurate pressure regulation/control stream, satisfies the technological requirement of each stage time-dependent current welding.Do not have outstanding transient response characteristic owing to magneto does not need outer given exciting current to set up voltage again, during the load of impact 100%, its transient voltage deviation equals the steady state voltage deviation substantially.By the design of optimizing permanent magnet can make the steady state voltage deviation of motor reach≤-2.5%.Auxiliary hydraulic power directly drags hydraulic pump by the rear output shaft of magneto and provides.The utility model has fundamentally solved the problem of threephase generator phase-deficient operation, thereby has improved the efficient of generator greatly.So under the situation of equal welding transformer, the Capacity Ratio prior art of generator, engine can reduce greatly, as designing by 50% arcing time factor, the welding transformer of 250KVA, the single-phase permanent generator of the utility model configuration 400KVA～450KVA just can satisfy technological requirement, and prior art normally disposes the threephase generator of 750～1000KVA.
The generator of diaxon before and after the utility model utilization comprises, hydraulic power is directly dragged by the rear output shaft of engine by generator, has saved the motor and the distribution of auxiliary power, and structure is more simply and more practical.
Compared with prior art, the utlity model has following advantage:
1, adopt magneto alternator to make the source of welding current, except having the stronger transient state load capacity than common electric excitation synchronous generator, and volume is littler, lighter, efficient is higher.
2, the magneto of producing in batches is than lower with the electric excitation generator manufacturing cost of power.
3, cancelled the very big electronic voltage regulator that influences the generator reliability, system reliability further is improved.
4, owing to directly adopt speed governing to realize pressure regulation, current waveform does not distort, and the power factor (PF) of generator, transformer is improved greatly, and the loss that causes because of harmonic wave also drops to minimum, and welding quality is also more guaranteed.
5, the engine power that is disposed is also compared passing design and is greatly descended, and in addition in the little current work stage, engine moves with relatively low rotating speed, to energy consumption and to prolong life-span of engine all favourable.Of the present utility modelly be equipped with obvious energy-saving benefit.
6, hydraulic pump is directly driven by the rear output shaft of generator, saves relevant drive motor and distribution facility.
7, the engine output that exchanges rail welder is equipped with flywheel, has improved engine in the transient response in preflashing stage, further improves welding quality.
8, system architecture is quite simple, be easy to promote, and the cost of complete set of equipments also greatly descends.
Description of drawings
Fig. 1 is the structural representation of interchange rail welder of the present utility model.
Fig. 2 is the existing structural representation that exchanges rail welder.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
As shown in Figure 1, interchange rail welder of the present utility model comprises hydraulic pump 1, single-phase permanent generator 2, flywheel 3, engine 4, speed regulator 5, electric current-speed regulator 6, current transformer 7, single-phase transformer 8, welding electrode 9.Described interchange rail welder connects flywheel 3 by the spindle machine of engine 4, the preceding power shaft of flywheel 3 mechanical connection single-phase permanent generators 2, the rear output shaft mechanical connection hydraulic pump 1 of single-phase permanent generator 2, the power output end of single-phase permanent generator 2 is electrically connected the elementary winding of single-phase transformer 8, the secondary windings of single-phase transformer 8 is electrically connected welding electrode 9, in the welding process, welding electrode 9 is electrically connected rail 10.The induction end of current transformer 7 is installed on the power supply output loop of single-phase permanent generator 2, be used to detect the electric current (output current of single-phase permanent generator 2) of the elementary winding of single-phase transformer 8, the output of current transformer 7 connects the input of electric current-speed regulator 6, and the control output end of electric current-speed regulator 6 is electrically connected speed regulator 5.
Operation principle of the present utility model is: by diesel engine 4 Driven by Coaxial accumulated energy flywheels 3, single-phase permanent generator 2 and hydraulic pump 1, single-phase permanent generator 2 out-put supply ends are electrically connected single-phase transformer 8 elementary windings, single-phase transformer 8 after the secondary windings step-down by the welding of glistening of 9 pairs of rail 10 of welding electrode.The Hydraulic Station of the hydraulic power supply system that hydraulic pump 1 is produced uses.Electric current-speed regulator 6 is set by program according to the needed welding current of steel rail welding.During welding job, electric current-speed regulator 6 is according to the output current of single-phase permanent generator 2 that current transformer 7 is responded to, feed back to speed regulator 5, by the running speed of speed regulator 5 closed loops adjustment engine 4, satisfied (speed change → pressure regulation →) regulates the technological requirement of electric current.
Fig. 2 is the existing structural representation that exchanges rail welder.Constant voltage, constant frequency, electric excitation three-phase synchronous generator 11 are driven by constant-speed operation engine 12, and threephase motor 13 is driven by three-phase synchronous generator 11, and hydraulic pump 15 drives constant-speed operation engine 12 built-in isochronous governors 18 by threephase motor 13; Single-phase transformer 19 is welding transformers, and elementary winding connects wherein 2 outputs mutually of three-phase synchronous generator 11, and secondary coil connects welding electrode 20, and during the welding machine operation, welding electrode 20 links to each other with rail 21.IGCT 14 summation current transformers 17 are arranged in the loop of elementary winding of single-phase transformer 19, current transformer 17 is used to detect electric current, IGCT 14 is used for the phase shift pressure regulation, and current detecting and control system 16 are obtained the angle of flow of control IGCT 14 behind the current signal of current transformer 17.
From Fig. 1, Fig. 2 contrast as can be seen, the utility model system architecture is quite simple, has cancelled the very big electronic voltage regulator that influences the generator reliability, and system reliability is improved.The utility model is owing to directly adopt speed governing to realize pressure regulation, cancelled powerful IGCT, removing energy saving of system and reliability improves, more because not distortion of current waveform, and the power factor (PF) of generator, transformer is improved greatly, the loss that causes because of harmonic wave also drops to minimum, and therefore supporting capacity also descends, and welding quality is also more guaranteed.Hydraulic pump is directly driven by the rear output shaft of generator, saves relevant drive motor and distribution facility, and the cost of complete set of equipments also further descends.
Claims (7)
1. one kind exchanges rail welder, comprises hydraulic pump (1), generator (2), engine (4) and single-phase transformer (8) and a pair of welding electrode (9); Generator (2) is driven by engine (4), hydraulic pump (1) is driven by generator (2), generator (2) is electrically connected with the elementary winding of single-phase transformer (8), the secondary windings of single-phase transformer (8) and welding electrode (9) are electrically connected, engine (4) comprises speed regulator (5), it is characterized in that: generator (2) is the single-phase permanent generator, power shaft and rear output shaft before comprising, preceding power shaft is connected rear output shaft and hydraulic pump (1) mechanical connection with the spindle machine of engine (4).
2. interchange rail welder according to claim 1, it is characterized in that: the current transformer (7) and the electric current-speed regulator (6) that also comprise the electric current of the elementary winding that is used to detect single-phase transformer (8), current transformer (7) is electrically connected with electric current-speed regulator (6), and electric current-speed regulator (6) is electrically connected with speed regulator (5).
3. interchange rail welder according to claim 2 is characterized in that the PID adjuster of described electric current-speed regulator (6) for regulating with electric current/speed closed loop.
4. according to each described interchange rail welder of claim 1 to 3, it is characterized in that: also comprise flywheel (3), flywheel (3) is located at the preceding power shaft and/or the rear output shaft of generator (2).
5. interchange rail welder according to claim 4 is characterized in that described flywheel (3) is a steel accumulation of energy flying wheel.
6. according to each described interchange rail welder of claim 1 to 3, it is characterized in that described engine (4) is diesel engine or gas engine.
7. according to each described interchange rail welder of claim 1 to 3, it is characterized in that described speed regulator (5) is Electronic Control speed regulator or EFI control speed regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205486155U CN201799769U (en) | 2010-09-28 | 2010-09-28 | Alternating current steel rail welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205486155U CN201799769U (en) | 2010-09-28 | 2010-09-28 | Alternating current steel rail welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201799769U true CN201799769U (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205486155U Expired - Fee Related CN201799769U (en) | 2010-09-28 | 2010-09-28 | Alternating current steel rail welding machine |
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| CN (1) | CN201799769U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954533A (en) * | 2010-09-28 | 2011-01-26 | 广州三业科技有限公司 | Alternating current steel rail welding machine |
| CN108616232A (en) * | 2018-07-04 | 2018-10-02 | 青岛海信电子设备股份有限公司 | A kind of speed Control of Induction Motor device and speed Control of Induction Motor method |
-
2010
- 2010-09-28 CN CN2010205486155U patent/CN201799769U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954533A (en) * | 2010-09-28 | 2011-01-26 | 广州三业科技有限公司 | Alternating current steel rail welding machine |
| WO2012040961A1 (en) * | 2010-09-28 | 2012-04-05 | 广州三业科技有限公司 | Ac rail welding machine |
| CN108616232A (en) * | 2018-07-04 | 2018-10-02 | 青岛海信电子设备股份有限公司 | A kind of speed Control of Induction Motor device and speed Control of Induction Motor method |
| CN108616232B (en) * | 2018-07-04 | 2024-01-09 | 青岛海信网络能源股份有限公司 | Asynchronous motor rotating speed controller and asynchronous motor rotating speed control method |
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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 |
Granted publication date: 20110420 Termination date: 20180928 |
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| CF01 | Termination of patent right due to non-payment of annual fee |