An electro-hydraulic servo hydraulic system capable of outputting dynamic pressure and sintering equipment
An electro-hydraulic servo and hydraulic system technology, applied in the hydraulic field, can solve problems affecting the density and mechanical properties of sintered materials, uneven microstructure, and difficulty in eliminating hard agglomerates
Active Publication Date: 2017-11-03
TSINGHUA UNIV
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Problems solved by technology
However, in the existing hot press sintering equipment, due to the constraints of the hydraulic system composed of a single hydraulic circuit, the hydraulic system can only provide constant pressure (ie static pressure)
Under the action of this kind of static pressure, it is difficult for particles to slide and rearrange, it is difficult to discharge pores, it is difficult to eliminate the "hard agglomeration" formed between particles, and it is easy to cause uneven microstructure, which affects the density and mechanics of sintered materials. performance
The constant pressure provided by the hydraulic system of an ordinary pressure sintering furnace greatly affects the range of use of the sintering furnace and restricts the possibility of preparing advanced materials with higher performance in a hot-pressed sintering furnace
Method used
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[0024] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
[0025] Please refer to figure 1 , in this embodiment, the electro-hydraulic servo hydraulic system capable of outputting dynamic pressure includes a fuel tank 1, a drive motor 2, a hydraulic pump 3, a first check valve 4, a first filter 5, a second filter 6, a first Three filters 7, air cooler 8, accumulator 9, first pressure gauge 10, second pressure gauge 11, electro-hydraulic servo valve 12, first electromagnetic reversing valve 13, second electromagnetic reversing valve 14, the first Three electromagnetic reversing valves 15, fourth electromagnetic reversing valves 16, pressure sensors 17, first throttle valve 18, second throttle valve 19, first overflow valve 20, first one-way sequence valve 21, upper hydraulic pressu...
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The invention discloses an electro-hydraulic servo hydraulic system capable of outputting dynamic pressure. The system comprises an oil cylinder, a driving motor, a hydraulic pump, a first one-way valve, an electro-hydraulic servo valve, a first electromagnetic reversing valve, a third electromagnetic reversing valve and a fourth electromagnetic reversing valve. The driving motor is connected with the hydraulic pump and drives the hydraulic pump to act to pump out oil in the oil cylinder. The first one-way valve is connected with an oil outlet of the hydraulic pump. A port P of the electro-hydraulic servo valve is connected with the first one-way valve, and a port A of the electro-hydraulic servo valve is connected with a port P of the first electromagnetic reversing valve. A port P of the third electromagnetic reversing valve is connected wit an oil outlet of the first electromagnetic reversing valve. The third electromagnetic reversing valve is connected with an upper hydraulic cylinder. A port P of the fourth electromagnetic reversing valve is connected with an oil outlet of the first electromagnetic reversing valve. The fourth electromagnetic reversing valve is connected with a lower hydraulic cylinder.
Description
technical field [0001] The invention relates to the field of hydraulic technology, in particular to an electro-hydraulic servo hydraulic system capable of outputting dynamic pressure and sintering equipment. Background technique [0002] For ceramics and some metals with higher melting points, hot pressing sintering is usually used in the sintering preparation process. [0003] Hot pressing sintering refers to applying unidirectional or bidirectional pressure to the powder while heating the ceramic or metal powder at high temperature to accelerate the densification process of the powder material. However, in the existing hot-press sintering equipment, due to the constraints of the hydraulic system composed of a single hydraulic circuit, the hydraulic system can only provide constant pressure (ie, static pressure). Under the action of this kind of static pressure, it is difficult for particles to slide and rearrange, it is difficult to discharge pores, it is difficult to eli...
Claims
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IPC IPC(8): F15B1/02F15B11/16F15B13/02F15B21/08
CPCF15B1/02F15B11/16F15B13/02F15B21/08
Inventor 谢志鹏韩耀李双朱天彬
Owner TSINGHUA UNIV