Hoisting Mechanism 90JLF50

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Product Description:

Introduction

The products are independently developed and manufactured by our company via absorbing international and domestic advanced technologies.

Natinal Patented products:Patent 1:ZL2009 2 0243653.7

Hoisting Mechanism of Tower crane Patent 2:ZL2010 20226428.5.

Combined-type winding drum used in winch JLF series products adopt the structural style of variable frenquency motor +SNGW reducer+winding drum.S-NGM reducer is employed for the first time in China with the precision of all gears up to over 6 level and features of less noise, compact structure, light weight and convenient maintenance.

Specification

Model:90JLF50

Rated single rope tension(kN):50

Magnification:4

Rated power of the motor (kW):90

Working frequency(Hz):6-50-100

Hoisting speed (m/min):2.7-22-45

Hoisting capacity(t):20-20-10

Rope capacity(m):500(5 layers)/620(6 layers)

Nominal Diameter of wire rope (mm):Φ22

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Q:How heavy does a crane need to be to lift 5 tonnes?
It is not the weight of the crane alone that matters. But to some extend if the crane is light, this could create a torque when carrying a heavy load and the crane could collapse. Therefore I am speculating that inorder to lift 5Tonnes, the crane must be more than 5 tonnes to balance out the moments resulting in a torque The internal structure of bolts and trusses must be able to handle heavy loads and their are several calculations done to find each forces acting on the members of a truss. For eg: By using Pin Joint Analysis
Q:What is the difference between a tower crane QTZ31.5 and a QTZ40?
the length of the arm is 42-48 meters; the elevation is 29-32 meters.
Q:Stringing Paper Cranes Together?
Depends how you want to string them... but use thread and a needle. If you want to string them vertically, put the needle through the body of the paper crane... I not sure about horizontally. Too keep them in place, place knots below the body of the crane. I hope this helps, but I hope another more experienced person answers this :P
Q:a crane 10 is moving across a frictionless surface at 3/s. if you wish to bring the crate to a stop, how much?
If an object with mass 10kg is moving at x m/s it's Kinetic energy is ½mv² =½×10 kgm²/s² = 5x² Joules Example: 10kg @ 4m/s Ke = ½ (10kg)× (4m/s)² = 80 Joules
Q:Why are cranes used for hanging criminals in Iran?
they probably didn't have the proper arrangements to carry out the punishment so they used cranes instead of gallows. who knows? but weird really. and it wouldn't be more painful... err... the purpose is to snap the neck... ouch :(
Q:John Steinbeck and Stephen Crane?
Try Maggie: A girl of the streets, which is the novel I think of for Crane being part of the Realist school. I think you can also see Steinbeck, in his selection of subjects as being in that same school of fiction. So less for their style and more for their choice of subjects.
Q:What is the scope of the installation and disassembly of self lifting tower cranes and the applicable range of the cost and the off-site transportation cost?
The installation and disassembly of the existing self rated tower crane, the first cost and the off-site transportation cost quota are divided by the lifting moment 1000kNm and 2000kNm of the jack up tower crane.
Q:Ichabod Crane....... Sleepy Hollow?
absolutely.
Q:can u have a small dog w/u when u are operating a crane?
I can't imagine any employer allowing that condition to exist. A crane operator's attention must be on the job at all times. If the dog were to do something unexpected at a critical time, the operator may be distracted and lose control of the load.
Q:What measures should be taken to make tower cranes stable?
Phosphating coating of steel wire rope, give priority to the use of manganese or zinc manganese phosphating, and smooth steel wire rope production process comparison, just add the last bonderizing process, steel wire, wear resistance and corrosion resistance is greatly improved, the use of the wire without direct phosphating cold twisted steel wire rope.

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