tory burch outlet Roller type and design of hydrau

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Roller type and design of hydraulic vibration system


35MPa or more, resulting in peak pressure shock, sometimes accompanied by shrill noise, which systems and components is very unfavorable. Therefore,tory burch outlet, if the election was a high work pressure, more appropriate approach is to increase the buffer device, as shown in Figure 4 of the accumulator 5. Caveats. This closed system, can achieve variable speed motor (frequency conversion), but in the roller vibration system is usually only one or two fixed speed (fixed frequency). The theoretical basis of this application is: to change the excitation frequency of the vibration force transmission to the soil strength is not significant, this solid,love bracelet cartier, such as rollers made YZZ8 group, using this closed system,tory burch outlet, only selected 33.3Hz the amount and rate of 50Hz two kinds, namely, compaction and asphalt used in road base compaction. 3 hydraulic vibration system design calculations 3.1 hydraulic vibration system design parameters in the overall calculation is determined based on the use of the hydraulic system map, select the appropriate pump and motor units. The overall calculation to determine the parameters: vibration power Nv (kW) vibration frequency f (Hz) primary system working pressure: off systems, the rated working pressure P = 12MPa, oil return line back pressure and loss of P2 = 1.0MPa , the pressure difference △ p-Pl-P2 = 11MPa. Of the closed system, rated working pressure P = 17MPa, return oil back pressure P. = 1.0MPa, the pressure difference △ p-P - p; 16MPa. 3.2 3.2 +1 design calculations calculated motor displacement (m / r) present life × 10 - ... where Ⅳ - vibration power (kw) - Motor mechanical efficiency - volumetric efficiency of motor △ - motor oil inlet pressure difference (MPa), - frequency (Hz) (transfer under 29 side) D> 0.8 or T <0.5, the bearing life down very quickly, especially in the negative clearance, that Bearing in preload state. Bearing heat capacity, bearing life down faster. (See Figure 4) In addition to fever caused by poor lubrication. Can also lead to loss of bearing internal clearance, so an internal load bearing failure caused by 5 to determine bearing clearance bearing on the actual work, in determining the bearing radial clearance, in addition to considering the number of lead clearance reduction factors, also need to consider the time of manufacture bearings and other fixed factors shape the impact of the error, so the best practical and effective in the bearing clearance values ​​are generally zero or slightly positive selection in the security side is appropriate, that; △ a . A △. , ~ △ A one △ △ Q Bu a a △ ≈ 0 (m) formula. , - The original state of the radial bearing clearance. (M) 6 end Jian language to determine the bearing radial clearance is a very complex issue, in addition to the several factors on the impact of the bearing radial clearance, the bearing clearance in the design should also consider the following points: (1) high-speed bearing inner ring in the centrifugal force F is likely to further expansion, thereby reducing the effective radial clearance. (2) external heat input bearing parts of the bearing radial clearance effects. (3) bearing parts of the cooling conditions on the effects of radial clearance. (4) lubrication of bearings and lubrication of the bearing affect the heat balance. () From the start due to sudden changes in conditions, many local heat, temperature, rapid acceleration to high speed bearings, radial clearance of the impact. (6) ball bearing roller or rigid and elastic deformation of the radial clamping effect. (7) big bear large axial deflection or load effects on the radial clearance. In short, the value of the bearing with clearance must not be ignored, we must ensure that at a reasonable range, otherwise it will greatly reduce the life of the bearing reference (1] LIU Ze-nine, He Shiji: Machinery Industry Press, 1982 [2] Aisi Man, Ha Siba root, Wiegand special book (Liu Jiawen translation); .2 actual system working pressure P (MPa) households. = × [2j3.2.3 motor speed (r / rain) 3.2.6 converted to calculate the power of the engine vibration system H (kW) H eleven years' . 'm6of (3) where - the mechanical efficiency of the pump flow computing systems 3.2.4 Q (ma / s) 32.5 calculating the pump displacement q (. / r) g6o: Q-type - the engine rated Speed ​​(r / min) Ⅳ - power distribution box gear ratio - the efficiency of the original plot pits (4) (5) (6) - power distribution box transmission efficiency, take 0.97 ~ 0.983.2.7 hydraulic The total efficiency of the vibration system: '. m' Alexandra (7) 3.2.8 by the system pressure P and flow Q select the appropriate parameters and structure of various types of valves in the vibrational frequency calculations than the rated frequency is usually selected High 1 ~ 2Hz.
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