Backstops are used extensively on pumps used in the primary and secondary cooling systems of power generating equipment.
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The difference between flat bearing and roller bearingHave Read 7011/11/2019
1.Machining process of steel ball, stainless steel ball processing also varies according to the status of raw materials, with sharp cutting or ball in front of the process, can be divided into the following three, before the heat treatment process, and can be divided into the following two kinds, the whole process is: stainless steel bar or wire cold blunt (some bar after cold blunt still need band and annealing) fell sharply cut, coarse grinding, soft grinding or ball hard finishing lapping or polishing grinding heat treatment final inspection group rust, packaging, warehousing < to sets of assembly >.
Ring processing: bearing inner ring and outer ring processing varies according to the difference of the raw materials or blank forms, including car before machining process can be divided into the following three, the whole process is: the bar stock or tube (some bar need to the forging, annealing, normalizing) car heat-treated cylindrical grinding machining parts lapping and polishing final inspection antirust warehousing (stay close set of assembly >
Processing process of cage depending on the design structure and raw materials, the processing process of cage can be divided into the following two categories:(1) sheet - shear - blanking to hot press stamping, plastic and precision machining, ultrasonic cleaning machine pickling or shot peening or string light - final inspection to rust, packaging, warehousing (it can be set of assembly) (2) entity cage machining process: entity cage processing, according to the difference of the raw materials or bad MAO and differ somewhat, the car before the processing can be divided into the following four kinds of blank type, the whole process is: bar, pipe material, forging, casting car inside diameter, outside diameter, end face, chamfering drilling (or pull holes, boring) pickling final inspection rust, packaging, warehousing < to sets of assembly >
Roller of the machining process of the roller varies according to the difference of the raw materials, including heat treatment process can be divided into the following two, before the whole process is: the great skip processing or wire rod string band and soft grinding heat treatment after cold heading list of coarse grinding soft points of coarse grinding diameter end end face fine grinding outer diameter end mill diameter final inspection group rust, packaging, warehousing (stay in sets of assembly >.
flat bearings consist of flat cage components and flat washers with needle bearings or cylindrical rollers. Needle roller bearings and cylindrical rollers are held and guided by a flat cage. When used with different series of DF flat bearing gaskets, many different combinations are available for bearing configurations. Because the choice of high precision cylindrical roller (needle roller) to increase the contact length, so that the bearing in a small space can obtain high load capacity and high stiffness.
Another advantage is, if the adjacent parts surface suitable for raceway surface can eliminate the washer, can make the design compact, DF plane needle roller bearing and plane cylindrical roller bearing used for the cylindrical surface of needle roller and cylindrical roller for modified surface, can reduce the edge stress, improve the service life. Flat needle roller and cage assembly are the main components of flat bearing. The needle roller is held and guided by a radial array of pouches. The cage profile has a specific shape and is formed with hardened steel strips. The small size retainer is made of industrial plastics. The grouping tolerance of high-precision needle roller diameter is 0.002mm to ensure the even distribution of load.
The flat needle roller and cage assembly are shaft guided. In this way, a relatively low circumferential velocity can be obtained on the guide surface even at high speed. If the surface of the adjacent piece is designed as a raceway surface to eliminate the washer, the support can be obtained with special space saving. If this scheme cannot be carried out, the design can also be compact with the use of thin-walled steel AS series washers under the condition of sufficient support.