Pulse Width Modulation Hydraulic Transformer
A hydraulic transformer and pulse width modulation technology, which is applied in fluid pressure converters, fluid pressure actuating devices, fluid pressure actuating system components, etc., can solve the inability to reach the industrial application level of hydraulic transformers, and the discrete value of the transformation ratio cannot be realized Problems such as continuous pressure regulation, high manufacturing cost and popularization, to achieve the effect of compact structure, small energy loss and strong self-priming ability
Active Publication Date: 2021-01-19
YANSHAN UNIV
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Problems solved by technology
Although digital hydraulic transformers have high reliability and good linearity, their output transformation ratios are all discrete values, which cannot achieve continuous voltage regulation, and the efficiency of voltage regulation is low. In addition, the manufacturing cost is high and it is difficult to get large-scale promotion.
On the whole, although hydraulic transformers have undergone many innovations in structure and control, and have made certain breakthroughs in applications, so far there is no hydraulic transformer that can reach the level of industrial application in the market.
Method used
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Embodiment Construction
[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0028] The embodiment of the present invention proposes a pulse width modulation type hydraulic transformer, such as figure 1 , figure 2 with image 3 As shown, it is mainly composed of pump / motor flow unit and control valve group. The pump / motor flow unit is a two-way gear motor whose main body includes a driving gear 1 , a driven gear 2 , a shaft sleeve 3 , a sealing ring, a front end cover, a rear end cover 6 and a housing 7 . The control valve group consists of two two-position three normally closed high-speed on-off valves A-side valve 8 and B-side valve 9, which are respectively installed on the A-side valve block 10 and B-side valve block 11 on both sides of the pump / motor flow unit.
[0029]During the installation process, the A-side valve block 10 is fixed on the housing 7 of the flow unit by fastening screws. In order to prevent leakage between the two, a ...
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The invention provides a pulse width modulation type hydraulic transformer. The pulse width modulation type hydraulic transformer is characterized in that the hydraulic transformer comprises a pump / motor flow unit and further comprises an A side valve and a B side valve which are controlled by a PWM signal; by adjusting the duty ratio of the PWM control signal, the hydraulic transformer can achieve continuous pressure regulating, the pressure and flow pulsation generated by the hydraulic transformer during transformation ratio switching are avoided, and a load is protected; meanwhile, continuous pressure regulating has higher efficiency than step pressure regulating, and the pulse width modulation type hydraulic transformer has the wider transformation range which can reach (please see thespecification for the formula); and in addition, the pump / motor flow unit, the A side valve and the B side valve are integrated into a whole, and the advantages of compact structure, high self-absorption capacity, no outward leakage, small energy loss and fast dynamic response are achieved.
Description
technical field [0001] The invention belongs to the technical field of hydraulic transformers, in particular to a pulse width modulation hydraulic transformer. Background technique [0002] Hydraulic transformer is a new type of hydraulic component that realizes pressure conversion in hydraulic transmission. In the secondary regulation hydrostatic transmission of the constant voltage network, the hydraulic transformer can directly obtain energy from the constant voltage network without any energy loss, so that the constant voltage source can drive multiple independent loads with different working pressures at the same time, and can recover the power of the system Gravitational potential and kinetic energy are converted into hydraulic energy and stored in accumulators. At present, the common hydraulic transformers are mainly divided into traditional hydraulic transformers and digital hydraulic transformers. Traditional hydraulic transformers mostly use simple manipulation m...
Claims
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IPC IPC(8): F15B3/00F15B11/16F15B13/06F15B21/08
CPCF15B3/00F15B11/16F15B13/06F15B21/087
Inventor 刘涛韩炎
Owner YANSHAN UNIV