The crane needs to be washed before running, so what are the specific steps? There are several forms of bridge crane running mechanism transmission hoist manufacturers. What are the different characteristics of these forms? Below, this article is for everyone to introduce.
First, the crane’s no-load test steps
(1) Turn the brake wheel of each mechanism by hand so that one shaft (such as the wheel axle) cannot be stuck when it is rotated for one round.
(2) Trolley walking: The empty trolley travels back and forth three times along the track. At this time, the European crane should not have obvious slippage. The active wheels should be in contact over the entire length of the track. Start and brake should be normal and reliable. The limit switch operates accurately. The position of the bumper on the trolley and the striker on the bridge are accurate.
(3) Empty hook lifting: start the ground button box, Dengfeng multi-function European crane I-beam single-beam crane price, make the empty hook rise and fall three times, the switch action should be accurate and reliable. (4) Open the electric hoist trolley to the middle of the span. The crane walks twice along the entire length of the plant to verify the frame and track, and then travels back and forth three times at the rated speed to check the working quality of the traveling mechanism. At this time, when starting or braking The wheels should not slip, the walk is smooth, and the bumper works normally.
Second, the driving form of the bridge crane cart
The transmission mode of the bridge crane cart running mechanism is mainly divided into centralized driving and separate driving.
1, centralized drive
It is divided into fast (high speed) and slow (low speed).
The high-speed centrally driven cart running mechanism is directly connected to the coupling and the transmission shaft by the electric motor through the brake wheel, and the speed reducer is at both ends of the main beam running platform. The running shaft of the running mechanism has a high rotation speed, a small transmission torque, a small size of the transmission shaft and the shafting parts, and a light weight of the transmission mechanism.
The running mechanism of the cart driven by the low speed is directly connected to the reducer through the brake wheel, and the reducer is in the middle of the main beam. The transmission mode is characterized by low speed of the transmission shaft and relatively safe, but the torque of the transmission shaft is large, so that the size of some parts is large, making the whole mechanism heavier.
2, separately driven
The separate drive is to install two identical but unconnected drives on the overhead crane. It is characterized by the elimination of the drive shaft. The operating mechanism is lightened by its own weight, and the installation and maintenance department is convenient because of the good grouping.
3. There are two transmission modes for the trolley. That is, the reducer is located in the middle of the trolley drive wheel or the reducer is located on the side of the trolley drive wheel. The reducer is located in the middle of the trolley drive wheel. The torque on the output shaft of the trolley reducer and the drive shafts on both sides is relatively uniform. The speed reducer is located on the side of the drive wheel of the trolley. It is convenient to install and maintain, but the car body has a twisted left and right when the car is started.