Analysis and application of various components of bearing disassembly press

The bearing disassembly press is a versatile tool designed for safely removing and installing bearings from fan rotors. It consists of several key components, including a hand wheel, a bearing support plate, a slide rail, a drawbar, a lead screw, and a support plate frame. These parts work together to provide controlled pressure and alignment during the bearing removal and installation process. The hand wheel features a handle, a central screw, a key, and a nut, allowing users to adjust the position of the bearing support plate. By rotating the hand wheel, the user can move the support plate forward or backward, enabling precise positioning. The bearing support plate itself is made up of a base plate, a retaining iron, and bolts. Its front end is designed with a stepped shape, allowing it to fit into the gap between the bearing and the rotor. The curved surface of the support plate is slightly larger than the journal radius, ensuring smooth movement, while the thicker section matches the bearing’s inner diameter to securely hold it in place. The slide mechanism includes upper and lower blocks, a press plate, and a front panel, all connected by bolts. This system guides the support plate and transfers force efficiently during operation. The drawbar connects the front panel and bottom plate via nuts, forming a stable structure that can be adjusted to accommodate different rotor sizes. It also helps maintain tension between the front panel and the base. The lead screw assembly includes a screw, a nut, a rocker, a tip, and a bottom plate. The nut is fixed to the base, while the tip and screw rotate independently. The sharp angle of the tip is matched to the central hole of the shaft, allowing it to apply even pressure on the rotor shaft or sleeve during operation. The support plate frame, made of a base block, reinforcing ribs, and a pull block, ensures stability and allows for rotation around the axis. To use the press, a suitable support plate is selected based on the bearing type and mounted onto the frame using pins. The fan rotor is centered on the front panel, and the hand wheel is turned to clamp the front bearing. The lead screw is then rotated to press the shaft’s center hole, forcing the journal out of the bearing. After rotating the rotor 180 degrees, the same process is repeated to remove the rear bearing. For each bearing type, a custom casing is machined in advance. The casing has an inner diameter slightly larger than the journal and a length sufficient to avoid contact with the shaft end. During installation, the new bearing is placed between two support plates, aligned with the rotor’s journal, and pressed into place using the rotating screw. Once installed, the sleeve is added, and final adjustments ensure proper alignment before pressing the sleeve into the bearing. This bearing disassembly press is highly adaptable, capable of handling various bearing sizes by simply replacing the support plate. It can be used in both horizontal and vertical positions, making it ideal for large motor maintenance. Its portability and ease of use make it a valuable tool in industrial and mechanical settings.

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