What is the difference between a set sleeve and a release sleeve? Bearing adapter sleeve

Tensioning and dismounting sleeves are generally suitable for large bearings. The tightening sleeve is used to tighten the round nut and tighten the bearing, while the withdrawal sleeve is the opposite. To facilitate installation and disassembly of bearings, improve efficiency, and reduce the cost of mechanical maintenance, it is the original intention of tightening and disassembling the sleeve. In general, it means using a fastening sleeve for ease of installation, and using a detachable sleeve for ease of disassembly. The use of both the release sleeve and the locking sleeve can achieve the effect of adjusting the internal clearance.

The locking sleeve is convenient for adjusting the axial positioning of the bearing, and has good self-locking performance. The use of an optical shaft avoids the stress concentration phenomenon existing in the stepped shaft, which is beneficial for use in situations with heavy load transmission or impact vibration. Although this bearing device has a simple structure, it can only achieve satisfactory results under the premise of correct installation and maintenance. Otherwise, lack of speed can even backfire.

Installation steps

1. Apply grease to the inner diameter, outer diameter, threads, and large end faces of the locking sleeve and the release sleeve.

2. Assemble the fastening sleeve or withdrawal sleeve and the bearing together, initially lock them with a lock nut or hydraulic nut, and inject high-pressure oil into the end face (one oil hole for the fastening sleeve and two oil holes for the withdrawal sleeve) using a hand pump.

3. Use a lock nut to adjust the bearing clearance. After the clearance is adjusted, directly lock it or use a hydraulic nut to install the bearing. To adjust the clearance, remove the hydraulic nut and lock it with the lock nut.

Disassembly steps

1. When disassembling the fastening sleeve and withdrawal sleeve, apply grease to the threads on the fastening sleeve and withdrawal sleeve. Remove the nut and apply grease to the end face where the bearing contacts.

2. Inject high-pressure oil into the oil hole on the end face of the tightening sleeve or withdrawal sleeve with the hand oil pump. Under the action of high-pressure oil, forcefully rotate the disassembly nut or hydraulic nut to pressurize, so as to withdraw the tightening sleeve or withdrawal sleeve. (Removal of the fastening sleeve requires a threaded mounting nut at the shaft end as a fixing point.)

Removal of the sleeve bearing requires not only the use of a bearing remover, but also attention to some parts of the sleeve bearing for easy and simple removal. If you do not pay attention to these parts, the bearing may also be damaged. The following are precautions for disassembling the bearing on the disassembly sleeve: When disassembling the bearing on the disassembly sleeve, the axial locking device, such as the locking nut and end cap, must be removed.

When disassembling small and medium-sized bearings, use a lock nut, hook wrench, or impact wrench to loosen the bearings. The method of removing large bearings is to use hydraulic nuts. If the threaded portion of the shaft sleeve protrudes from the shaft end or shoulder, a support ring should be inserted into the sleeve hole, and the wall of the support ring should be as thick as possible to avoid causing thread deformation and damage when tightening the nut when using hydraulic pressure. It is recommended to add a barrier to the hydraulic nut end, such as through the shaft end. If the withdrawal sleeve suddenly separates from its shaft seat, a barrier can be used to prevent the withdrawal sleeve and hydraulic nut from completely withdrawing from the shaft.

The removal sleeve for large bearings is generally equipped with an oil distribution groove to facilitate the use of the oil injection method, greatly reducing the time required to install and disassemble large bearings.