A high-power frequency speed control system of high pressure jet water pump of dredger
A frequency conversion speed regulation, dredger technology, applied in the field of speed regulation system, can solve the problems of inability to realize stepless speed regulation, easy to crash, not enough environmental protection, etc., and achieve excellent speed regulation performance and obvious effect.
Inactive Publication Date: 2008-07-09
GUANGZHOU WENCHONG SHIPYARD CO LTD +2
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Problems solved by technology
[0002] At present, the high-pressure flushing pump speed control system used in dredgers mainly adopts two forms: diesel engine drive and self-coupling transformer drive. The former is not environmentally friendly because it needs to consume a lot of diesel oil, and it is easy to crash when running at low speed. The latter is more environmentally friendly, but The speed regulation range and performance are relatively poor. The latter cannot realize stepless speed regulation and the starting current is large. The impact on the ship power station when starting is likely to cause fluctuations in the grid voltage and frequency
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[0017] The present invention will be further described below in conjunction with the accompanying drawings.
[0018] As shown in Figure 1, the dredger high-voltage flushing pump 8 high-power frequency conversion speed regulation system of this embodiment includes a main switchboard 1, a frequency converter 2, a phase-shifting transformer 3, a braking resistor 4, a programmable controller 5, and a motor 6. The gear box 7 and the high-pressure flushing pump 8. The frequency converter 2 is a 12-pulse frequency converter 2 that adopts an independent closed-loop cooling water system. Its electrical input terminal is electrically connected to the electrical output terminal of the main switchboard 1. connected, its electrical output terminal is electrically connected to the electrical input terminal of the motor 6; the phase-shifting transformer 3 is a three-winding phase-shifting transformer 3, which is connected in series between the main switchboard 1 and the frequency converter 2 ...
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The invention discloses a high voltage jet water pump large-power frequency speed control system used for a dredge which comprises a main switchboard, a 12 pulse IBGT rectifier control inverter of an independent closed-typed cyclic cooling water system, a programmable controller, a motor, a gearbox, a three winding and phase-shift transformer which is connected between the main switchboard and the inverter which is externally connected with a brake resistor; a power cable between the inverter and the motor adopts a fully shielded EMC cable, and the cables in two ends of the motor and the inverter are grounded in 360 DEG. The invention has the advantages in that: the performance of the speed control system and the automatic reliability of the electric part are improved to a new level; the energy is saved and the environment is protected; the excellent speed control performance reaches to 0-1480rpm, adjusts the speed according to the twice speed-loading curve, and outputs in 1480-1683 rpm constant torque; the high frequency radiation current is limited inside the system, and the effect of the anti-interfere is obvious and the interfere towards the other surrounding equipments can be ignored; the free inversion caused the continuous rotation of the motor along with the inertia moment of the pump until the influence of the water gravity can be avoided.
Description
technical field [0001] The invention relates to a speed regulation system of a high-pressure flushing water pump, in particular to a high-power frequency conversion speed regulation system of a high-pressure flushing water pump used for a dredger, and belongs to the field of speed regulation systems. Background technique [0002] At present, the high-pressure flushing pump speed control system used in dredgers mainly adopts two forms: diesel engine drive and self-coupling transformer drive. The former is not environmentally friendly because it needs to consume a lot of diesel oil, and it is easy to crash when running at low speed. The latter is more environmentally friendly, but The speed regulation range and performance are relatively poor. The latter cannot realize stepless speed regulation and the starting current is large. The impact on the ship power station when starting is likely to cause fluctuations in the grid voltage and frequency Contents of the invention [00...
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IPC IPC(8): H02P27/04G05B19/05H02G3/00H02P3/22
Inventor 陈德林李宁龙红刚李忠何可军陈强华张艳
Owner GUANGZHOU WENCHONG SHIPYARD CO LTD