Position:Technology Center

The transducer application in hoisting mechanism of tower type crane

From;    Author:Stand originally
Tower type crane has research and development in the light of the pattern plate craft in building construction, a heavy swing of the housing materials in the industry that applies to ferroconcrete structure and civil building construction and component.
1. At present the main timing pattern of domestic hoisting mechanism
Hoisting mechanism is the main transfer machinery with tower type the mainest crane, at present traditional timing pattern plays requirement burden low speed, carry high speed gently, timing scope is big; The actor bad of pattern of hoisting mechanism timing is affected directly overall function. Pattern of hoisting mechanism timing chooses a principle to have 3: Want above all smooth, impact is little; Its secondary economy and reliable, accord with national condition; 3 it is to want facilitating maintenance.
Pole changing control of 1.1 many fast electric machinery
The largest lifting capacity is less than 4 ropes the competition of engine of small medium-sized tower that is equal to 6T is intense, cost control is strict, home is given priority to with pole changing control of many fast electric machinery, plan is simple, application is wider, often use 4/8/32 slue fast electric machinery comes true.
The reducer that 1.2 electromagnetism clutch shifts gear adds the sheet that takes eddy current apply the brake fast electric machinery of the rotor that wind a string
Our country of this timing pattern already used a few years, but already used no longer gradually now. It relies on electromagnetism clutch to shift gear the speed ratio that changes reducer, the sheet that relies on to take eddy current apply the brake fast electric machinery of the rotor that wind a string strings together resistor to get softer character and slow perch rate. Its advantage is to move smoother than effect, speed ratio can set plan big. Its defect is more, above all electromagnetism clutch uses homebred machine tool to use a product commonly, life is brief, dependability is poor; It is next cannot the trends in sky alternates clutch archives, can glide otherwise, this is very dangerous; 3 it is reducer cost taller.
1.3 common reducer are added those who take eddy current apply the brake is much fast electric machinery of the rotor that wind a string
Shift gear the electromagnetism clutch of on one kind of means instead is much drive of fast electric machinery is common the train of thought that reducer of odd speed ratio is this means. Pound big drawback to shifting gear at many fast electric machinery, those who take eddy current apply the brake is much fast electric machinery of the rotor that wind a string can string together resistor to get softer M-n character, have apply the brake and grade switch is smoother, have slow perch rate, power can be used greatly than squirrel cage electric machinery. Way of this kind of timing is tectonic and simple, yi Wei is protected, reliability is high. Solved eddy current apply the brake successfully to circle line rotor electric machinery to come loose at present hot issue, raised the dependability of pattern of this kind of timing greatly.
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