Micro-stroke double-action vibration-exciting hydraulic cylinder
A double-acting hydraulic cylinder and double-acting technology, applied in fluid pressure actuation devices, fluid pressure actuation system components, mechanical equipment, etc., can solve difficult position control, small vibration amplitude of working load, complex position control system, etc. problem, to achieve the effect of realizing high-frequency vibration, solving the rise of oil temperature, and simple system
Inactive Publication Date: 2012-01-04
ZHEJIANG UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to provide a micro-stroke double-acting excitation hydraulic cylinder, which solves the problems of the existing hydraulic cylinder such as large stroke, complicated position control system, high cost, unsatisfactory working load, small vibration amplitude, and difficult position control.
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[0015] The present invention will be further described below in conjunction with drawings and embodiments.
[0016] Such as figure 1 As shown, the micro-stroke double-acting excitation hydraulic cylinder of the present invention is mainly composed of an end cover 1, an end cover 2, a cylinder barrel 3, a piston rod 4, a piston 5, a first flow channel 15, a first flow channel 16, a second flow channel 17, The second flow channel 18, the eighth flow channel 10, the fifth flow channel 6, the sixth flow channel 7, the ninth flow channel 9, the tenth flow channel 11, the annular groove 8, the one-way valve 12, the one-way valve 13, Check valve 14, main oil port A 1 and main port A 2 and so on. The end cap 1 on the left side of the piston 5, the cylinder barrel 3, the left part of the piston rod 4 and the piston 5 form a closed second working oil chamber C, the end cap 2 on the right side of the piston, the cylinder barrel 3, and the right side of the piston rod 4 The side part...
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The invention discloses a micro-stroke double-action vibration-exciting hydraulic cylinder which is characterized in that piston rods at two sides of a piston are internally simultaneously provided with first and second flow channels communicated with each other; the outlet of each second channel is provided with a one-way valve; the piston rod at each side is provided with more than one pair of spacing holes communicated with the first flow channel along the circumferential direction at intervals; the central axes of each pair of spacing holes coincide with each other and intersect the central axis of the first flow channel respectively; the central axes of all spacing holes in the piston rod at the same side are located on the same transverse cross section of the piston rod; all spacingholes have the same inner diameter and the central axes of all the spacing holes have the same distance from the central transverse cross section of the piston; the first flow channels in the piston rods at both sides of the piston are in mirror symmetry in respect of the central transverse cross section of the piston; and the second flow channels in the piston rods at both sides of the piston are in mirror symmetry in respect of the central transverse cross section of the piston. The distance between end covers at both sides of the piston is equal to the that between the central axes of the spacing holes at both sides of the piston.
Description
technical field [0001] The invention relates to a double-acting hydraulic cylinder, which is mainly used in the technical field of hydraulic vibration exciters for external load vibration. Background technique [0002] The exciter is a device attached to some machinery and equipment to generate exciting force, and is an important part of using mechanical vibration. The vibrator can make the excited object obtain a certain form and size of vibration, so as to perform vibration and strength tests on the object, or to calibrate vibration testing instruments and sensors. According to the different excitation types, the exciter is divided into inertial electric type, electromagnetic type, electro-hydraulic type, pneumatic type and hydraulic type. The vibrator can be used as an exciting part to form a vibrating machine, which is used to realize the conveying, screening, compacting, forming and tamping of soil and gravel of materials or objects. In recent years, hydraulic exciter...
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IPC IPC(8): F15B21/12
Inventor 龚国芳闵超庆刘毅杨学兰
Owner ZHEJIANG UNIV