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A New Type of Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Mechanism

A positive and negative stiffness, negative stiffness technology, applied in the field of new positive and negative stiffness parallel low-frequency vibration isolation mechanism, can solve the problems of poor adaptability to working conditions, poor flexibility, low stability, etc., achieve good stiffness characteristics, convenient installation and transportation, The effect of improving adaptability

Inactive Publication Date: 2019-04-16
BEIJING UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to improve the traditional low-frequency vibration isolation mechanism with positive and negative stiffness in parallel, which is inconvenient to install, complex in structure, poor in adaptability to working conditions, poor in flexibility, high in cost and low in stability, and proposes a new type of low-frequency vibration isolation mechanism in parallel with positive and negative stiffness. Vibration isolation mechanism

Method used

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  • A New Type of Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Mechanism
  • A New Type of Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Mechanism
  • A New Type of Positive and Negative Stiffness Parallel Low Frequency Vibration Isolation Mechanism

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Embodiment 1

[0068] Such as figure 1 As shown, it is a block diagram of the system composition structure of a novel positive and negative stiffness parallel low-frequency vibration isolation mechanism in the present invention and this embodiment. Among them, the connection relationship of each component module is as follows:

[0069] The lower end of the load-bearing structure A is connected with the support and fixed structure of the base; the horizontal spring support column B is fixed on the upper surface of the support and fixed structure G of the base; The negative stiffness spring adjustment device D on the inner side of B is connected, and the other end is hinged with the load-bearing structure A; the damping structure E is fixed on the upper end surface of the base support fixed structure G and connected with the cylinder side wall of the load-bearing structure A, and the positive stiffness spring adjustment device H Fixed on the lower end surface of the base supporting and fixing...

Embodiment 2

[0077] Figure 8 Shown is a schematic structural diagram of a novel positive and negative stiffness parallel low-frequency vibration isolation mechanism of this embodiment. Basically similar to Example 1, the difference is that the adjustment knob 33 is used in conjunction with the spoke pressure sensor 30 (such as Figure 7 shown) to adjust the static balance position of the vibration isolation mechanism, and ensure the accuracy and consistency of the adjustments of all vertical springs.

[0078] If the load-bearing quality of the system changes, the horizontal spring connecting rod 25 is not in a horizontal state at the static equilibrium position of the system. At this time, the adjustment knob 33 can be rotated and used in conjunction with the spoke pressure sensor 30 to make the adjustments of several vertical springs accurate and consistent. . Move the static equilibrium position of the system so that when the system is in the static equilibrium position, the horizonta...

Embodiment 3

[0080] Figure 9 Shown is a schematic structural diagram of a novel positive and negative stiffness parallel low-frequency vibration isolation mechanism of this embodiment. Basically similar to Example 1, the difference is that the compression spring adjustment nut 22 is used in conjunction with the S-type pressure sensor 17 (such as Image 6 shown), adjust the pressure of the compression spring main body, thereby continuously adjusting the pre-compression of the horizontal spring main body 14, and ensure the accuracy and consistency of the pre-compression of several horizontal springs. After the adjustment of the pre-compression amount of the main body of the horizontal spring is completed, the proximal sliding block 15 of the horizontal spring is fixed by the fixing screw 16 of the proximal sliding block of the horizontal spring. By controlling the pre-compression of the horizontal spring body, the negative stiffness characteristic range of the system can be adjusted. When...

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Abstract

The invention discloses a novel positive / negative rigidity parallel low-frequency vibration isolation mechanism. The mechanism comprises a positive-rigidity spring adjusting device, a vertical spring body, a negative-rigidity structure, a negative-rigidity spring adjusting device, a damping structure, a bearing structure, a horizontal spring support column and a base support fixed structure, wherein the positive-rigidity spring adjusting device includes a circular sleeve, an adjusting knob and a pressure sensor 1; the negative-rigidity structure includes a horizontal spring body and a sleeve, horizontal spring slide blocks 1 and 2, a horizontal spring connecting rod and a cylinder side wall hinge device; the negative-rigidity spring adjusting device includes a stud and and an adjusting knob thereof, a stud fixed frame, a pressing spring body, a pressing adjusting nut, and a pressure sensor 2 and a fastening nut thereof; the damping structure includes an adjusting cushion plate, a damper and a connecting plate thereof; the bearing structure includes a bearing table and a cylinder side wall; and the base support fixed structure includes a support plate, a disc base, a support cushion leg, a support column and a linear bearing. The mechanism has such vibration isolation advantages as compact structure and accurate adjustment.

Description

technical field [0001] This patent relates to a new type of positive and negative stiffness parallel low-frequency vibration isolation mechanism, which can be widely used in the technical field of low-frequency vibration control in the fields of vehicles, suspensions, and precision instruments. Background technique [0002] Vibration is a common phenomenon in mechanical engineering, and vibration is harmful in many cases. With the continuous development of engineering technology, the power and speed of operating machinery continue to increase, and vibration has become a very common and urgent problem. question. Mechanical vibration not only damages the efficiency and life of mechanical equipment, but also produces noise, which affects the stability of mechanical equipment operation and has adverse effects on the surrounding environment. For a long time, people have formed three methods to control vibration problems: reducing and eliminating vibration source excitation (impr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/04
Inventor 曹东兴史晓峰刘彦琦张伟
Owner BEIJING UNIV OF TECH
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