Thin wall bearing on how to improve the preset

Thin wall bearing source: how to improve the preset bearing | last updated: - 2020 11 - 11 thin wall bearing on how to improve the preset clear objective function and the improvement of the thin wall bearing preset limit bearing of ascension. Common objective function is fatigue service life is long, Basic load rating is very big) , damage to the service life is longer, Small oil slick alternated very big) The friction torque is very low. Because of the small office environment regulations bearing application as far as possible, the diameter of the bearing steel ball, interior space is limited to make the inner diameter of the bearing and the diameter of the relatively large axial force and, therefore should take into account the strength of shaft big compressive strength ( Thin thin bearing) Represents the outer and inner hole in large axial force must have a certain alternated. The thick and the diameter of the bearing steel ball and the ball group associated with the diameter of the pitch circle. Because the diameter of the bearing steel ball, half the pitch diameter of ball type group is the independent variable in the relation between the basic load rating. In addition, give full consideration to the provisions of the fatigue damage and bearing is commonly used in the experiments, picked out the improve overall objectives: constraints on the basis of the bearing under rating load is very large. The solution of the design variables in the design of thin wall bearing, the total number of bearing steel ball Z as an integer value of independent variable; Bearing steel ball diameter of Dw in general should be selected based on specification, it is discrete variable. The ball group Dpw pitch diameter for continuous variables. Thus, the reliability design of the bearing is mixed the reliability design of the independent variables. Bearing steel ball diameter of Dw to result harm is very big. The specification standards of the diameter of the bearing steel ball is only five. 0 and 5. 5 mm. Not too much. Thus, in the whole process of ascension, bearing steel ball diameter Dw was conducted on the basis of continuous variables, it is to improve results out of condition. If is not very big difference with parameter values, choose the most close to the parameter values. If the difference is very big, please according to the results of ascension, tailored to the producers. In addition, full of thin wall bearing assembly is also a difficulty. Fully considering bearing tolerance only in 1/2 area, choose in non load bearing area of annular secure channel bottom add filling way of bearing steel ball in the hole. Correction accurately measure and control module type data signals after U, adjust the precise measurement and control module of the larger multiplier to display information relative to the vibration of the offset A ( Lm） 。 If application of instantaneous speed sensors, sensor in theory of power Q to Q = AX3D = vXD = aD ( 10) Among them: D is the working voltage of the instantaneous speed sensors sensitivity, mV/g; V is vibration rate, m/s; A is shaking instantaneous velocity g ( 1 g = 9。 8 m/s2) 。 In the understanding of the sensitivity of the sensor, application ( 10) Measurement and vibration offset, rate and the instantaneous velocity of the three main parameters relativity should power output of the sensor output. Instantaneous velocity instantaneous velocity sensor application main parameters calibration instruments more visual, more easily. To calibration target only accurate measurement and control module, not including sensors. Correction accuracy is the credibility of the sensor sensitivity technical specifications and type data signals and monitoring equipment and precision instruments and equipment. Also see the 'read this article: the basis of thin wall bearing to rubber seals provisions: 1. Thin-wall shaft is wear resistance, not easy to etching metal materials; 2. Excellent oxygen resistance and aging resistance, strong and durable; 3. Bearing heat and temperature. It is not easy generation and soften at high temperature, it is not easy to under cryogenic YingDeHua; 4. Thin-wall shaft fit with the work material, no solubilization, generation, YingDeHua etc. 5. Moderate ductility and strength, compaction less permanent deformation; Thin-wall shaft metallurgical industry quality of raw materials is harmful before early 6209 thin wall bearing invalid key elements. With the development of metallurgical technology ( Such as bearing steel vacuum degassing. ) , raw material quality improved. Raw material quality factor of bearing failure shows that central plains has been significantly reduced, but still is one of the key elements of the hazard bearing is invalid. Proper raw material selection is still bearing failure description must consider the factors.