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Wire rope electric hoist operating speed a variety of differe


Wire rope electric hoist has a variety of operating speeds, mainly divided into two speeds and single speed. Today we mainly introduce the two-speed wire rope electric hoist. Its main components include the running mechanism, reducer, reel device, and limit. Positioner, hook device, etc. The two-speed wire rope electric hoist is used more frequently in the daily industry, so it is necessary to understand some of its precautions when operating it.

1. The model of the two-speed wire rope electric hoist installed after the new installation or after dismantling is MD1. First, the empty car test run should be carried out several times. However, before the installation is completed, it is forbidden to turn on the power.

2. Two-speed wire rope electric hoist should be carried out with a rated load of 125% before normal use, lifting up to 100 mm from the ground, 10 minutes of static load test, check whether it is normal.

3. The dynamic load test is based on the rated load weight, repeated lifting and left and right movement test. After the test, check the mechanical transmission part, whether the electrical part and the connecting part are normal and reliable.

4. When using the two-speed electric hoist, it is absolutely forbidden to use it under the unacceptable environment and exceeding the rated load and the rated number of closings per hour (120 times).

5. During installation, commissioning and maintenance, the positioner must be strictly checked for flexibility and reliability. When the hook is raised to the upper limit position, the distance from the hook casing to the drum casing must be greater than 50 mm (10t, 16t, 20t must be greater than 120mm). When the hook is lowered to the lower limit position, the wire rope safety ring on the reel should be ensured, and the effective safety ring must be more than 2 turns.

6. It is not allowed to simultaneously press two flashlight buttons that move the electric hoist in the opposite direction.

7. After the work is completed, the main gate of the power supply must be pulled off to cut off the power.

8. The two-speed electric hoist should be operated by a special person. The operator should fully grasp the safety operation rules and strictly prohibit the slanting sling.

9. In the course of use, the electric hoist must be inspected regularly by special personnel, and the fault should be taken in time and carefully recorded.

10. When adjusting the brake slip of the double-speed wire rope electric hoist, it should be ensured that under the rated load, the brake slip amount S≤V/100 (V is the distance that the load rises stably within the next minute).

11. The scrapping standard of the wire rope of the two-speed electric hoist: the inspection and scrapping standards of the wire rope are carried out according to CB/T5972-1986 "Practical Specification for Inspection and Disposal of Wire Ropes for Lifting Machinery".

12. The two-speed electric hoist must maintain sufficient lubricating oil and keep the lubricating oil clean and should not contain impurities and dirt.

13. Hard wire brush or wooden small piece should be used when oiling the wire rope. It is strictly forbidden to directly apply oil to the working wire rope by hand.

14. When the two-speed electric hoist is not working, it is not allowed to hang heavy objects in the air to prevent permanent deformation of the parts.

15. Special attention should be paid to the wearing parts during use. In the course of use, if a fault is found, the main power should be cut off immediately.