Hydraulic lift energy-saving control system with hydraulic transformer
An energy-saving control system and hydraulic transformer technology, applied in elevators, transportation and packaging, etc., can solve the problems of high system cost and large installed power, and achieve real-time control, reuse, and fast dynamic response
Inactive Publication Date: 2005-06-15
ZHEJIANG UNIV
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Problems solved by technology
Compared with the traditional valve-controlled speed control system, this system has the advantages of load power adaptation and partial recovery of downlink energy, so it is much more energy-efficient than the valve-controlled system, but the installed power is still relatively large, and the system is expensive due to the use of frequency converters
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[0012] figure 1 It is a structural schematic diagram of a hydraulic elevator energy-saving control system using a hydraulic transformer, wherein: 1 is a variable pump / motor, one end is connected to a filter 45 through a pipeline 41, and the oil tank 46 is connected through a pipeline 42, and the other end is connected to a pipeline 31 and a pipe Roads 32 and 30 are connected, and are coaxially connected with quantitative pump / motor 2 through coupling 47. 2 is a quantitative pump / motor, one end is connected with pipelines 31 and 32 through pipeline 30, and the other end is connected with pressure through pipeline 29. The sensor 13-2 is connected, 3 is a speed measuring photoelectric encoder, which is installed on the other end of the quantitative pump / motor 2 through another coupling 50, 4 is the main circuit hydraulic control check valve, and one end is connected to the pressure sensor 13 through the pipeline 28 -2 connection, the other end is connected with the pressure senso...
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The invention discloses a hydraulic elevator energy-saving control system using a hydraulic transformer. Hydraulic transformer consisting of variable pump / motor and constant pump / motor. It extracts energy from the constant voltage network to supply the load through the special pressure-energy conversion element of the hydraulic transformer. As a pressure converter, it can adjust the network pressure to any value within the pressure range without throttling loss. In this way, the lossless transmission of energy can be realized; the transformation process of the transformer is reversible, and energy can be output to the load, and energy can also be recovered from the load, so as to realize energy reuse; the dynamic response of the hydraulic transformer is fast, and real-time control can be easily realized; A transformer can be used as a pressure amplifier, producing an output pressure much higher than the input pressure.
Description
technical field [0001] The invention relates to a hydraulic elevator energy-saving control system using a hydraulic transformer. Background technique [0002] From the beginning of its production, the hydraulic elevator has experienced the development process from the valve-controlled hydraulic system to the frequency conversion control hydraulic system, and energy saving and consumption reduction has always been one of the major topics of research and development in this field. [0003] The traditional valve-controlled throttling speed regulation system is the most mature technology and the most widely used in the current hydraulic elevator control system. It mainly uses the throttling speed regulation technology in hydraulic technology to control the running speed of hydraulic elevators. Its biggest advantage is that the system is simple, the control is convenient, and the price is low. However, since the throttle is used for speed regulation, a large part of the energy o...
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IPC IPC(8): B66B1/04
Inventor 徐兵杨华勇欧阳小平刘贺
Owner ZHEJIANG UNIV