Nylon Pulleys For Tower Crane

Products Specification

Nylon Pulleys For Tower Crane 

Tower Crane Nylon Pulleys

Tower Crane steel Pulleys

Trolley pulley

hoist pulley

It has high mechanical strength and is suitable for large machinery.
It has good wearability and self-lubrication. The wearability of MC nylon is 4-5 times better than steel or iron pulley.
It can be applied in a wide temperature limit from -40 degree to100 degree.
It can reduce vibration and work smoothly with no noise.
It will not damage the couple material. If used for crane pulley and wire rope, the service life can be prolonged by 10 times.
It has the self-extinguishing function and is safe
With the density of 1/7 of steel, 1/2.5 of copper, it is light. And it has good corrosion resistance, sheds water and does not rust.
It has good machining operations and high shape stability.

Nylon Pulleys For Tower Crane 

Tower Crane Nylon Pulleys

Tower Crane steel Pulleys

Trolley pulley

hoist pulley

Tower Crane Knowledge sharing：

Discussion on the role of lifting height limiter and rotary limiter for tower crane
With a comprehensive advanced tower lifting technology, the following discussion with everyone: tower lifting height limiter and rotary limiter of the role of the discussion.
Lift height limiter:
The lifting height limiter is used to avoid possible control errors. In order not to touch the crane arm frame structure when rising, prevent the steel rope on the reel from loosening or even circling the drum in the opposite direction.
For a tower crane with movable arm amplitude, the lifting height limiter is generally composed of a bumper rod, a lever, a spring, and a stroke switch, and is fixed at the end of the crane.

The heavy hammer connects the wire rope of the hook ring and the limiter with the lever of the terminal switch. When the heavy hammer is in a deformed position, the terminal switch contact is closed.

Nylon Pulleys For Tower Crane 

Tower Crane Nylon Pulleys

Tower Crane steel Pulleys

Trolley pulley

hoist pulley

If the hook picks up, drags the hammer and continues to rise slightly to get rid of the gravitational effect of the hammer, the lever of the terminal switch moves at an angle under the action of the spring, causing the trigger of the control loop of the lifting mechanism to disconnect and stop the hook from rising.
The lifting height limiter is individually installed at the end of the roller shaft of the lifting mechanism for the self-lifting tower crane with variable amplitude. The multi-function limiter consists of a transmission system(deceleration installation) and a stroke switch.

The limiter is mounted on one end of the reel and is directly driven by the reel. It can also be driven by a ring fixed to the reel and a small gear tooth.
Rotary limiter:
The most commonly used rotary limiter is composed of a limiter switch and a Pinion with a reducer. The limiter is fixed on the supporting structure of the tower crane swing, and the Pinion is fitted with a large gear with a rotary support.
When the rotary folding electric idea drives the upper part of the tower crane to move, the small gear of the rotary limiter is rolled through the large ring of teeth. The number of turning rings of the tower crane is recorded.

The reducer of the limiter drives the cam and the cam. The bump presses the micro-switch, Thus blocking the corresponding rotary control loop, ending the rotation activity.

How to debug the gravity moment limiter in a small variable amplitude tower
Can produce a variety of models, provide the latest and most comprehensive various types of Tower hanging prices. The enterprise has the domestic advanced construction machinery production line, the precision inspection equipment, can guarantee the quality is reliable and safe. Welcome customers to visit the factory, we will provide the lowest price, the best service.

Nylon Pulleys For Tower Crane 

Tower Crane Nylon Pulleys

Tower Crane steel Pulleys

Trolley pulley

hoist pulley

The following on the car variable amplitude tower lifting gravity moment limiter debugging method to do the following discussion. Taking the gravity moment limiter applied on the QTZ63 tower crane as an example, the debugging method of the torsional limiter of the bow plate of the first tolerance tower:
1. When the hook is empty, use a screwdriver to distinguish between the stroke switches 1, 2, and 3 to ensure that the three switches are sensitive and reliable.
1 The stroke switch 1 is a limit switch with a fixed torque of 80 %, press the switch, and the buzzer alarm on the linkage table.
2 Trip switches 2 and 3 are the limit switches for extra torque. Press down the switch. The power supply for the lifting mechanism to pick up and change the amplitude mechanism is blocked. The lifting hook can only land, and the variable car can only run backwards. And the linkage table instigates the light to shine, beeping continuously alarm.
2. When adjusting the hook takes a fourfold rate and a single breaking height of 40 meters or less, lifting the weight slightly from the ground, the car may run.
3. When the working range is 50 meters long, the car runs to a 25-meter range, and the lifting component is 2290KG.

After the lifting weight is lifted from the tower, the adjustment and adjustment of the adjustment screw 4 to the stroke switch 1 corresponds to the stroke switch 1. Change the connection and tighten the corresponding adjustment nut 7.
4. According to the constant amplitude variable code adjustment moment limiter, adjust the stroke switch 2.
5. Adjust the moment limiter to adjust the stroke switch 3 according to the constant amplitude variation.

Nylon Pulleys For Tower Crane 

Tower Crane Nylon Pulleys

Tower Crane steel Pulleys

Trolley pulley

hoist pulley