Will be changed to 2000 and 1 and 3 to 2, can reduce the value of the resistance, the result 6, the piston returns to the original position around 0.53, waiting for the next brake, the plunger movement is gentle, this process is fully satisfied with the piston Return sensitivity requirements.
5 Conclusion In summary, the oil return rate is more than 1.53 times from the oil pressure loss of the piston along the path, which is three times the expected return time of 0.53. The above result is mainly because the recovery coefficient is too large. There is a large fluctuation in the piston movement. Change the ruler to other parameters, the simulation result is 5, the piston movement does not fluctuate, but the return time is still around 1. Knowing that the returning oil friction and oil inertia force play a major role, that is, the oil path appears. Blockage.
The coefficient of the Nie and the magnitude of the restoring force are determined together. The piston viscous damping force is small. The pressure loss along the path is mainly determined by the roughness of the tubing inner diameter tubing. The spring stiffness cannot be too high. The long-term use will cause the spring to age.
Therefore, it is necessary to reduce the pressure loss as much as possible. From the analysis of the first part, it can be known that increasing the inner diameter of the pipe and reducing the frictional resistance of the pipe can be effectively reduced, thereby achieving a fast and stable returning effect.
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Carbomer Carbopol 940,also called Carbomer or Carboxypoly-methylene is a generic name for synthetic high molecular weight polymers of acrylic ACID used as thickening, dispersing, suspending and emulsifying agents in pharmaceuticals and cosmetics. They may be homopolymers of acrylic acid, crosslinked with an allyl ether pentaerythritol, allyl ether of sucrose or allyl ether of propylene. Carbomers are found in the market as white and fluffy powders. They have the ability to absorb, retain water and swell to many times their original volume. Carbomers codes (910, 934, 940, 941 and 934P) are an indication of molecular weight and the specific components of the polymer . This product is acrylic bonded allyl sucrose or pentaerythritol allyl ether polymer. Calculated on dry goods, including carboxylic acid group (-cooh) group - should be 56. 0 % ~ 68. 0 %.
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