| 摘要 |
An energy recovery actuating method and a pressure gas actuating device accordingly, for cyclic upward and downward movements, utilized to lift a useful load together with a permanent weight, consuming less energy by recovering a part of the kinetic energy of the permanent weight during downward movement, having a pressure gas closed circuit, which comprises a pressure generator or a booster, a linear ^as actuator, a means which directs the fluid in one direction or in reverse, a gas accumulator and an auxiliary pressure generator. The energy drawn from electrical power grid is distributed over entire, up and down cycle, therefore is required less power and in consequence a smaller electrical motor size. Application fields: - Down hole oil or water pump sucker rod lift system, with front mounted geometry, class m lever system; - Lifting equipments for cyclic upward and downward movements, which carry significant loads and weights.
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