| 摘要 |
PURPOSE:To obtain a highly accurate flowmeter characterized by a simple structure and low noises, by arranging a plurality of cam rollers, which are freely rotated independently, on supporting shafts, which are fixed to both end parts in the direction of a rotor shaft at the rear ends of blades, with a specified interval being provided. CONSTITUTION:A plurality of cam rollers 14a and 14b are arranged on supporting shafts 13, which are fixed to both end parts in the direction of a rotor shaft 9 at the rear ends of blades 12a and 12b, with a specified interval being provided, so that the rollers are reely rotated independently. Caps 6 and 7 are arranged on both ends of a rotor 8. A groove in each cap comprises a cam surface 15a, to which either of the cam roller 14a or 14b is contacted, and a cam surface 15b, to which the other roller is contacted. When the blades 12a and 12b are protruded, one cam roller is moved on one cam surface 15a. When the blades 12a and 12b are put inside, the other cam roller is moved on the other cam surface 15b. Thus the resistance between the cam groove and the cam roller is decreased, and the measuring accuracy of liquid is improved. Since the cam rollers move on the cam surface independently, noises are decreased. |
