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The hoist is a large mechanical equipment bearing in transportation, so the installation steps are very important for the hoist to avoid some errors and necessary troubles.
1. Install the underframe and tighten the embedded screws, put the jack up platform in place so that the frame and center line coincide Hoist with the center line of the column, put the bottom section into the frame, and connect the lower end with the underframe with screws.
2. Place the lifting pulley on the top of the two installed columns, install the manual winch on the jack up platform, put on the lifting steel wire rope, and place the derrick on the jack up Hoist platform.
3. Use the hand hoist to lift the platform until the table top is flush with the top surface of the vertical rod, remove the lifting pulley and place it on the top of the Hoist standard section of the block.
4. Install the winch and directional pulley, put on the steel wire rope, and connect the Hoist winch switch box.
5. Send the second group of standard sections into the hanging basket. The lifting basket first heightens one column of the upper lifting rope with a derrick and then fixes it, and then lifts another standard section. At this time, put down the hanging basket to relax the lifting steel wire, with 6m steel wire rope allowance left in the frame, and then take out the top steel wire rope from the pulley groove and buckle it outside the platform jacket,
At this time, install the lifted standard section to the steel wire rope section margin, then take out the top steel wire rope from the pulley, buckle it outside the jacket on the platform, install the lifted standard section, place the lifting pulley on the top of the third group of standard sections, and repeat step 3 to lift the platform.
6. A group of horizontal and diagonal bracing attachment rods are set at the layer connection platform, which are firmly connected with the embedded steel pipe with fasteners, and a group of goose head parking device is set.
7. Reduce 3M according to the total height, place the height limit device and lift the basket to make it close to the limit height of about 0.3m. Repeat several times to check whether the lifting height limit is sensitive and reliable.
The installation of angular contact ball bearings is more complex than that of deep groove ball bearings. They are mostly installed in pairs, and preloading is required. Good installation can greatly improve the working accuracy and bearing life of the host; Otherwise, not only the accuracy can not meet the requirements, but also the service life will be affected.
The installation forms of angular contact ball bearings include back-to-back, face-to-face and series arrangement. When installing back-to-back (the wide end faces of the two bearings are opposite), the contact angle line of the bearing diffuses along the rotation axis, which can increase its radial and axial support angle rigidity and deformation resistance; face to face (the narrow end faces of the two bearings are opposite)
during installation, the contact angle line of the bearing converges towards the rotation axis, and the ground bearing angle rigidity is small. Because the inner ring of the bearing extends out of the outer ring, when the outer rings of the two bearings are pressed together, the original clearance of the outer ring is eliminated, which can increase the preload of the bearing; arranged in series (the wide end faces of the two bearings are in the same direction)
during installation, the contact angle lines of the bearings are in the same direction and parallel, so that the two bearings can share the working load in the same direction. However, when using this installation form, in order to ensure the axial stability of installation, two pairs of bearings arranged in series must be installed opposite at both ends of the shaft.