The bearing is the component used for supporting, and is also used to support the rotating part of the bearing shaft. The type of bearing is divided according to the friction property: sliding bearing and rolling bearing; according to the direction of bearing load: radial bearing, thrust bearing, radial thrust bearing Wait.
The bearing is the component used for supporting, and is also used to support the rotating part of the bearing shaft. The type of bearing is divided according to the friction property: sliding bearing and rolling bearing; according to the direction of bearing load: radial bearing, thrust bearing, radial thrust bearing Wait.
In this paper, the Dalan oil pump motor series focuses on the assembly of the sliding bearing. The sliding bearing is a sliding friction bearing. It features stable operation, low reliability, low load, and can withstand heavy loads and large impact loads. Can be divided into integral, split and tile type.
1. Assembly of integral sliding bearing
1Integral sliding bearing, commonly known as bushing, is also the simplest form of sliding bearing. It is mainly assembled by pressing and hammering, and hot charging is used for special occasions.
2 Most bushings are made of copper or cast iron. They should be assembled with care. They can be assembled by hammering with wooden hammer or hammer pad. When the interference tolerance is large, press it with a press.
3 It must be prevented from tilting when knocking in or pressing in. After assembly, the oil groove and oil hole should be in the required position.
4 Bearings that are deformed after assembly shall be trimmed with internal holes, smaller sized reamers may be used, and larger sizes may be scraped.
5 At the same time, pay attention to the matching clearance between the control and the shaft within the tolerance range. In order to prevent the rotation of the sleeve during operation, the contact surface of the sleeve and the box body is provided with a positioning pin or a riding screw.
6Because the hardness of the material of the box body and the bushing is not the same, it is easy to make the bit bias to the side of the soft material. Solution: a. Punch the hole with a hard material before drilling; b. Use a short bit to increase The rigidity of the drill bit when drilling.
Split bearing assembly
Split bearing, also known as split bearing, has the characteristics of simple structure, convenient adjustment and disassembly, two bushings on the bearing bush, and a reasonable gap between the joints.
1 bearing bush and bearing body assembly
The contact between the upper and lower bearing bushes and the hole in the bearing body must be good. If the bearing body hole of the thick-walled bearing bush is not met as required, the back of the bearing bush should be scraped, and the ends of the bearing bush should be close to the two ends of the bearing body. The thin-walled tile can be used as long as the mid-section of the bearing bush is about 0.1 mm higher than the mid-section of the bearing body.
The 2 bearing bush is installed in the bearing body, and no displacement is allowed in either the radial direction or the axial direction. Usually, the steps at both ends of the bearing pad are used to stop the positioning or the positioning pin.
3-axis tile
For the split bearing bush, the shaft is usually used to match the shaft. Generally, the bearing bush is scraped off first, and then the bearing bush is scraped. In order to improve the efficiency, the bearing bush and the cover are not installed when the bearing bush is scraped, and the contact point of the lower bearing bush is basically When the requirements are met, the upper bearing bush and the upper cover are pressed together, and the contact point of the lower bearing bush is further corrected when the upper bearing bush is scraped. The degree of tightness of the shaft when shaving can be adjusted by changing the thickness of the gasket as the number of scraping increases. When the bearing cap is tightened, the shaft can be easily rotated without significant clearance, and the contact point meets the requirements, that is, the scraping is completed.
4 bearing clearance measurement
The size of the bearing clearance can be adjusted by the spacer at the mid-section, or by directly shaving the bearing. The bearing clearance is usually measured by the pressure lead method. Take a few lead wires with a diameter larger than the bearing clearance, place it on the journal and the middle split surface, then tighten the nut to press the middle split surface, then unscrew the nut, remove the bearing cap, and carefully The flattened lead wire is taken out, and the thickness is measured for each micrometer. The bearing gap can be known according to the average thickness of the lead wire. Generally, the clearance of the bearing should be 1.5‰-2.5‰(mm) of the shaft diameter, and the smaller gap value should be taken when the diameter is larger. If the shaft diameter is 60mm, the bearing clearance should be between 0.09-0.15mm.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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