Digital servo hydraulic cylinder

A digital servo and hydraulic cylinder technology, applied in the direction of fluid pressure actuators, mechanical equipment, etc., can solve the problems of low stability and reliability of digital servo hydraulic cylinders, and achieve the effects of low cost, high precision and wide application range

Inactive Publication Date: 2017-02-01
OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability and reliability of the existing digital servo hydraulic cylinders are not strong. For example, on June 29, 2010, a safety accident occurred in the "Space Trek" amusement project "Space Trek" in the Overseas Chinese Town in Eastern Shenzhen, resulting in 6 deaths and 10 injuries, including serious injuries. 5-people

Method used

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  • Digital servo hydraulic cylinder

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Effect test

Embodiment Construction

[0019] Such as figure 1 As shown, the digital servo hydraulic cylinder of this embodiment is mainly composed of a front end cover 1, a cylinder barrel 2, a piston rod 3, a ball screw 4, a piston 5, a screw nut 6, a servo direction control spool 7, a rear end cover 8, and a limiter. It is composed of bit block 9, axial gap compensator 10, control motor 11 and so on.

[0020] figure 1 Among them, the piston rod 3 is a hollow piston rod. The hydraulic cylinder has a rod chamber directly connected to high-pressure oil Ps, the piston surface area of ​​the rodless chamber is twice the piston surface area (A1) of the rod chamber, and the hydraulic oil pressure of the rodless chamber is 0.5 times that of the rod chamber hydraulic oil pressure (Ps) , the pressure on the left and right sides of the piston 5 is consistent at the initial stage, and the digital servo hydraulic cylinder is in a balanced state.

[0021] figure 1 Among them, the servo directional control valve is a three-...

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Abstract

The invention discloses a digital servo hydraulic cylinder mainly composed of a piston rod, a ball screw, a piston, a screw nut, a servo directional control valve core, a limiting block, an axial clearance compensator and a control motor. The piston rod is a hollow piston rod; and a rod cavity of the digital servo hydraulic cylinder is directly connected with high-pressure oil. A servo directional control valve where the servo directional control valve core is located is a three-position zero-opening valve, the servo directional control valve core and the ball screw are formed into an integer, and the ball screw extends into a center hole of the piston rod and is meshed with the screw nut in the center hole; the other end of the servo directional control valve core is connected with one end of the limiting block, the other end of the limiting block is connected with one end of the axial clearance compensator, and the other end of the axial clearance compensator is connected with a shaft of the control motor; and when rotating, the control motor drives the servo directional control valve core and the ball screw to rotate together. The digital servo hydraulic cylinder has the characteristics of high frequency response, high starting frequency, low unit power cost and the like.

Description

technical field [0001] The invention belongs to the field of electromechanical equipment, and in particular relates to a digital servo hydraulic cylinder. Background technique [0002] Digital servo hydraulic cylinder is a high-end intelligent basic hydraulic component. It is a high-tech hydraulic transmission and control product that organically combines oil cylinder, digital servo / proportional valve and digital servo controller into a single device. It is especially suitable for transmission systems such as high-precision speed, position control, and coordinated motion control. Especially in terms of large flow or ultra-large flow (kiloliters per minute), high-frequency or ultra-high-frequency servo control, the digital hydraulic system has incomparable advantages. Competitive advantage and cost-effective. Its application fields mainly include: injection molding machine hydraulic energy saving, ship digital hydraulic steering gear system, ship fin stabilizer system, canti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14F15B15/20
CPCF15B15/1423F15B15/1457F15B2215/30
Inventor 蔡勇丁凡刘硕沈莹杰方辉
Owner OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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