Machine liquid composite transmission system based on pressure control
A compound transmission and pressure control technology, applied in transmission, fluid transmission, mechanical equipment, etc., can solve problems such as high cost and complex structure
Pending Publication Date: 2017-09-05
ZHEJIANG UNIV
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Problems solved by technology
However, due to its relatively complex structure, the mechanical-hydraulic transmission using planetary gear trains has a high cost.
Method used
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[0040] Figure 4 It is another application example of the present invention, and the present invention is applied in the fan cooling system of construction machinery. Wherein the input shaft is connected with the diesel engine 6, and the output shaft is connected with the engineering machinery cooling fan 8. When construction machinery is working, it is necessary to adjust the speed of the cooling fan in real time according to different working conditions. When the working condition is light, the variable pump / motor unit can work in the motor mode. When the working conditions are severe, the variable pump / motor unit can be operated in the pump mode, and the actual speed of the fan can be adjusted in real time according to the required speed to realize the speed-up of the fan blades.
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The invention discloses a machine liquid composite transmission system based on pressure control. The system comprises a variable pump/motor unit, a novel hydraulic transmission and a hydraulic oil tank; the novel hydraulic transmission is provided with two oil liquid ports, an input shaft and an output shaft, and the input shaft and the output shaft are driven through a hydraulic structure in a transmission mode; and the variable pump/motor unit adopts a through-shaft type, the variable pump/motor unit and the input shaft of the novel hydraulic transmission are coaxially connected, the variable pump/motor unit communicates with one oil liquid port of the novel hydraulic transmission in a connected mode, and the variable pump/motor unit and the other oil liquid port of the novel hydraulic transmission are both connected to the hydraulic oil tank. According to the system, the speed increasing and reducing functions can be achieved so as to be matched with the rotating speed and the torque which are needed by the load. Compared with a traditional hydrostatic transmission, repeated assemblies and pipeline connection in a hydraulic pump control motor system are omitted, so that the structure is simpler, and the transmission efficiency is higher.
Description
technical field [0001] The invention relates to a hydrostatic transmission device, in particular to a pressure-controlled machine-hydraulic compound transmission system. Background technique [0002] The traditional hydrostatic transmission technology is widely used in the field of construction machinery due to its high power-to-weight ratio, compact structure, and easy realization of large torque. However, limited by the efficiency of the current hydraulic pump motor components, the overall efficiency of the hydrostatic transmission system is generally not high, especially under low load conditions, the efficiency of the hydraulic variable components drops significantly as the displacement decreases. In order to improve the advantages of hydrostatic transmission technology, at the system level, hydraulic accumulators are used to form a hydraulic hybrid system to realize braking energy recovery and start-up power assistance; at the component level, hydraulic pumps are improv...
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IPC IPC(8): F16H47/02
CPCF16H47/02F16H2047/025
Inventor 王峰张浩翔迈克尔·古斯特金·斯特尔森
Owner ZHEJIANG UNIV
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