Energy-saving staircase driving host
The utility model relates to the main frame that uses on a kind of escalator or the moving sidewalk.
Because the application scenario of staircase main frame has determined that the maximum characteristics of staircase host work are the big torques of slow speed of revolution.Generally about 40rpm, this speed obviously can't realize for traditional ac three-phase asynchronous motor for present staircase main frame, mouth rotating speed.And because the needed torque of lifting escalator is very big, generally at 1100-3000N.m, so traditional staircase main frame all is made up of two parts: motor and speed reducer.General motor is an ac three-phase asynchronous motor, is the primary mover of main frame, comes rev down by a worm-gear speed reducer then, increases torque.The advantage of worm and gear transmission is to obtain very big single staged transmission ratio easily; But its shortcoming also clearly, is exactly that driving efficiency is low excessively, is generally about 0.7.In addition, because asynchronous dynamo needs exciting current to generate an electromagnetic field in the course of the work, the copper loss and the iron loss of reactive loss and stator (or rotor) have been increased, so its power factor is lower, be generally about 0.8, therefore existing staircase main frame only is about 0.6 in the efficient under the nominal operation state.And watt loss is bigger during startup, if consider the waste of power of (as starting state) under the off-nominal behavior, efficient will be lower.Therefore, a big defective of traditional staircase main frame is exactly an inefficiency, and energy has wasted greatly.
Some energy-saving escalators are also arranged now, and version is the worm and gear transmission that changes traditional low efficiency, the gear transmission of employing.But only be to have changed running part, what primary mover still adopted is the asynchronous motor of high speed low torque, and product only is that the two is simply pieced together together, such as there being a kind of product exactly asynchronous motor to be placed on a gear reduction box top, be delivered on the gear reduction box by the horsepower output of belt-driving, again by the drop-gear box final horsepower output that slows down motor.This main frame because reduction ratio is higher, must cause efficient greatly to reduce.And only just asynchronous dynamo and this machine of two kinds of gear reduction box are carried out the assembly unit of machinery, and can not realize organic combination, product machinery and electric property are difficult to be guaranteed.
The utility model content
The purpose of this utility model is: design a kind of energy-saving staircase main frame, this main frame can realize dragging the function of escalator, and work efficiency is greatly improved, and plays energy-saving and cost-reducing effect.
In order to realize above purpose, the utility model has been made following structure, and primary mover has adopted the permagnetic synchronous motor of permanent-magnet synchronous technology, the output of permagnetic synchronous motor is converted into the output of staircase main frame by speed reduction gearing.On main engine bed, be fixed with permagnetic synchronous motor and gear reduction drive mechanism, the gear reduction drive mechanism is the one-level gear transmission structure, wherein high speed gear shaft is the motor shaft of permagnetic synchronous motor, the low speed gear axle is the output shaft of permanent magnetic synchronous arm rest lift main frame, and high speed gear shaft is connected by gear pair with the low speed gear axle; The main frame support is divided in two parts, aft section is as the casing of permagnetic synchronous motor, the motor bonnet is attached thereto, the permagnetic synchronous motor part is housed in the shell, the previous section of towing machine support is a gear box body, the high speed gear shaft end by bearings on the end cap of deceleration box, the low speed gear axle also passes through the bearings at two ends on main frame support and drop-gear box end cap, and end stretches out the output shaft of a drop-gear box end cap part as main frame, and the drop-gear box end cap is fixed on the main engine bed; High speed gear shaft is provided with cylindric spiral gear, and with the low speed gear axle on low speed big gear wheel engagement.
The utility model is a kind of a kind of high efficiency staircase main frame that permagnetic synchronous motor and high efficiency gear system are organically combined.The slow speed of revolution large torque and high-efficient rate of permagnetic synchronous motor and the high efficiency of slant gear transmission have been made full use of.Therefore can under lower-speed state, export very big torque, not need the required torque of escalator that just can get a promotion of very high transmitting ratio.Therefore only in a kind of embodiment of the present utility model, the permagnetic synchronous motor rotating speed is 160rpm, and output torque can reach 750N.m, need be output torque and the rotating speed that 4 speed reduction gearing just can be met work requirements by a reduction ratio.Particularly adopt the one-level slant gear transmission.Its transmission advantage is a stable drive, long service life, driving efficiency height.Generally can reach 0.96-0.99.And because input end adopts is permagnetic synchronous motor, its in the course of the work magnetic field be to produce by permanent magnet, saved the exciting current in the asynchronous motor working process, motor power factor approaches 1.Therefore electrical efficiency is than the asynchronous motor height, and because permagnetic synchronous motor also can be exported very big torque under lower-speed state, so its efficient basically identical under each working condition.Therefore, the efficient of permagnetic synchronous motor can reach more than 0.9.Based on above principle, the novel permanent magnetic synchronous arm rest lift traction machine of mentioning here, work efficiency generally can reach 0.87-0.9.Compare with traditional staircase main frame, efficient improves 40-50%.
This main frame can be used for dragging of escalator, moving sidewalk.Owing to adopt the permanent-magnet synchronous technology, and adopt the very high one-level helical wheel transmission of efficient,, play effect in energy saving and environmental protection so can realize very high driving efficiency.
Description of drawings
Fig. 1 is the utility model constructional drawing;
Fig. 2 is the A-A section-drawing of Fig. 1.
The specific embodiment
Primary mover is the permagnetic synchronous motor that has adopted the permanent-magnet synchronous technology in the utility model, the output of permagnetic synchronous motor is converted into the output of staircase main frame by speed reduction gearing.
The utility model specific embodiment is described below: we see from figure, and main frame support 13 is divided in two parts, and aft section has a motor bonnet 3 that motor stator 2 is housed to be attached thereto as the casing 14 of permagnetic synchronous motor on it.In casing inside, the outside of motor stator 2 is rotors 1, and it and high speed gear shaft (motor shaft) 7 are for being rigidly connected, and by the bearing 16 at high speed gear shaft two ends, rotor 1 is fixed on the inside of motor case, and can be around motor stator 2 rotations.The previous section of main frame support 13 is gear box bodies 4, high speed gear shaft (motor shaft) 7 is partly with cylindric spiral gear 5 from what motor internal was stretched, and with big gear wheel 19 engagement, high speed gear shaft 7 ends are supported on the drop-gear box end cap 5 by bearing 16, another part as gear drive, low speed gear axle (output shaft) 18 also is supported on main frame support 13 and the drop-gear box end cap 5 by the bearing 17 at two ends, and terminal 8 stretch out drop-gear box end cap 5 parts, are used to install the sprocket wheel (not shown) that drags escalator and commentaries on classics.In addition, needing glancing impact in the work, is to realize by the outside face friction of brake scotch 9 with rotor 1.Brake scotch 9 is installed on above the brake control lever 10, and the pressure that glancing impact produces by retarding spring 11 compression is pressed in brake scotch on the outside face of rotor 1 and produces friction, to reach braking effect.When towing machine was worked, 12 energisings of magnetic force device produced oppositely directed thrust, to overcome the pressure of spring, brake scotch 9 are separated with rotor 1 outside face, and rotor 1 can freely rotate.
The principle of work of the utility model staircase main frame is as follows: after the energising, form a rotating field above the motor stator 2, drive the outer rotor 1 that posts permanent magnet thus, outer rotor 1 drives the high speed gear shaft (motor shaft) 7 that is attached thereto and rotates therewith; By the transmission of one-level helical wheel, drive the low speed Large Gear Shaft During (output shaft) 18 that is meshed and rotate then, realized the transmission of power thus, the transfer of energy of the output of motor is to output shaft the most at last.
Quit work or glancing impact, in the time of the motor outage, magnetic force device 12 also cuts off the power supply, and retarding spring 11 is pressed in brake scotch 9 on rotor 1 outside face by brake control lever 10, makes main frame keep static.
When the utility model is used for dragging of escalator, moving sidewalk with permagnetic synchronous motor, can on permagnetic synchronous motor, increase speed reduction gearing, single-stage slant gear transmission recited above is a kind of embodiment wherein, also can change to other type of drive according to the output demand, as the multi-stage gear transmission, epicyclic gear transmission or worm and gear transmission.