Single rod equal area double acting hydraulic cylinder capable of balancing weight

A technology of double-acting hydraulic cylinder and balancing weight, applied in the direction of fluid pressure actuating device, etc., can solve the problems of poor stiffness, slender hydraulic cylinder, complex structure, etc., and achieve the effects of high stiffness, high vibration frequency and simple structure

Inactive Publication Date: 2004-09-08
ZHEJIANG UNIV
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Problems solved by technology

[0002] In order to increase the vibration frequency, reduce the power of the hydraulic source, and be able to carry heavy objects with heavy weight, hydraulic vibration tables use external hydraulic cylinders or air cylinders to balance the weight of the heavy objects, and some use double-rod excitation hydraulic cylinders The piston rod protruding fr

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  • Single rod equal area double acting hydraulic cylinder capable of balancing weight
  • Single rod equal area double acting hydraulic cylinder capable of balancing weight

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[0010] As shown in the drawings, the present invention includes piston rod 2, cylinder 3, gas storage tank or accumulator 4, constant pressure controller 5, end cover 8, inner plunger 9, three-position four-way electro-hydraulic servo / proportional valve 10. Hydraulic source 11, piston 12; the lower end of the cylinder tube 3 is connected with the end cover 8. The center of the end cover 8 in the cylinder tube 3 is equipped with an inner plunger 9 with a through hole 13 in the center, and one end of the hollow piston rod 2 The inner plunger 9 is sleeved from the upper end of the cylinder 3, and a piston 12 is mounted on one end of the hollow piston rod 2. The other end of the hollow piston rod 2 is in contact with the vibrated object 1, and the outer cylindrical surface of the piston rod 2 It is in a sealed sliding fit with the hole of the cylinder 3, the outer cylindrical surface of the piston 12 is a sealed sliding fit with the inner cylindrical surface of the cylinder 3, and the...

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Abstract

The present invention is one kind of single rod equal area double acting hydraulic cylinder capable of balancing weight. The hydraulic cylinder has cylinder with lower end connected to end cap, plunger mounted on the end cap, piston rod with one end jacketing the inner plunger and with piston mounted and the other end contacting with vibrated weight, oil cavity connected to the load port of three-position-four-way electric liquid servo/proportional valve, and empty cavity communicated with gas storage or energy accumulator and constant pressure controller. The present invention combines the hydraulic or pneumatic cylinder to balance weight inside the exciting hydraulic cylinder, has single rod equal area double acting structure cooperating with three-position-four-way electric liquid servo/proportional valve, and thus has high vibration frequency, simple structure and great rigidity.

Description

Technical field [0001] The invention relates to a fluid pressure actuator, in particular to a single-rod equal-area double-acting hydraulic cylinder capable of balancing weight. Background technique [0002] In order to increase the vibration frequency, reduce the power of the hydraulic source, and be able to carry heavy objects to be vibrated, hydraulic vibration tables use external hydraulic cylinders or air cylinders to balance the weight of the heavy objects, and some use double-rod excitation hydraulic cylinders The piston rod protruding from one end of the non-loaded heavy object is pushed by air pressure or oil pressure to achieve the purpose of balancing the weight of the heavy object. As a result, multiple hydraulic cylinders or air cylinders are added to balance the weight of the heavy object. The structure is complicated, or The hydraulic cylinder is slender and has poor stiffness. Contents of the invention [0003] The purpose of the present invention is to pr...

Claims

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Application Information

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IPC IPC(8): F15B15/14
Inventor 丁凡王宣银崔剑王洁
Owner ZHEJIANG UNIV
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