TWI482864B - A composition having a damping characteristic, and a damper to which the composition is applied - Google Patents

Description

Composition having damping characteristics and damper applying the same

The present invention relates to a composition having damping characteristics, and more particularly to a composition which can withstand the high temperature generated when the damper is actuated to maintain good damping characteristics, and a damper to which the composition is applied.

The general hydraulic damper is filled with a viscous fluid, that is, a damping oil. When the damper is actuated, the piston rod drives the piston to squeeze the damping oil to generate a damping force.

The common damping oil is eucalyptus oil, which utilizes the high viscosity of eucalyptus oil, allowing the damper to convert mechanical energy into other forms of energy, such as heat. However, eucalyptus oil also has some disadvantages. For example, a piston that is operated for a long time will not only cause bubbles in the sputum oil, but also gradually increase the temperature of the sputum oil itself, so that the viscosity of the damping oil is lowered, resulting in a weakening of the damping force, resulting in "damping decay (Shock Fade)" phenomenon. In addition, since the damping oil is an organic substance, the damping oil having an increased temperature is also liable to undergo a chemical change, thereby deteriorating the damping oil and affecting the damping force of the oil pressure damper.

In order to overcome the aforementioned problems, other components are usually added to the eucalyptus oil to change the characteristics of the eucalyptus oil, or directly switch to other dampers to load the damper. However, these methods increase the cost of the damper and make it difficult to stably control the performance of the damper.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a composition having damping characteristics which can be applied to a damper and which can maintain the damping force of the damper and avoid the occurrence of damping degradation.

Another object of the present invention is to provide a damper to which the composition is applied.

In order to achieve the foregoing, the present invention provides a composition having damping characteristics. The composition mainly includes 10% by weight to 40% by weight of indium (Indium); 45% by weight to 80% by weight of gallium (Ga); and 5% by weight to 25% by weight of tin (tin, Sn).

Since the composition of the present invention is a metal alloy having good viscosity, thermal conductivity and electrical properties but not foaming, and belongs to an inorganic substance, when it is applied to a damper, it is not long due to the damper. The time is generated to generate bubbles, or the chemical change or the viscosity is lowered due to the high temperature generated by the damper operation, so that the damping force of the damper can be maintained and the phenomenon of damping degradation can be avoided.

In the composition of the present invention, mercury (Hg), bismuth (Bi), lithium (lithium, Li), sodium (sodium, Na), potassium (potassium, K), strontium ( Rubidium, Rb) or cesium (Cs) at least one element.

Further, the composition of the present invention exhibits a liquid state at a temperature of from 10 ° C to 30 ° C.

Fig. 1 is a graph showing the relationship between the forward force and the resistance obtained by measuring the composition according to an embodiment of the present invention by an atomic force microscope; and Fig. 2 is a graph showing the results of measuring the composition of the embodiment by a contact angle analyzer.

The invention will now be described in greater detail.

The composition having damping characteristics provided by the present invention preferably includes an indium (In) element, a gallium (Ga) element, and a tin (tin) element, and the content of the indium element is preferably. It is 10% by weight to 40% by weight, more preferably 16% by weight to 26% by weight. When the content of the indium element is less than 10% by weight, precipitates may occur in the composition, affecting damping characteristics; conversely, when the content of the indium (In) element is higher than 40% by weight, the eutectic temperature of the composition may exceed 30%. °C, the composition cannot be rendered liquid, and cannot be applied to the damper. Next, the content of the aforementioned gallium element is preferably from 45 wt% to 80 wt%, more preferably from 56 wt% to 75 wt%. When the gallium element content is less than 45 wt% or more than 80 wt%, the eutectic temperature of the composition may exceed 30 ° C, so that the composition cannot be in a liquid state, and cannot be applied to a damper. Further, the content of the aforementioned tin element is preferably from 5% by weight to 25% by weight, more preferably from 9% by weight to 18% by weight. When the tin element content is less than 5 wt% or more than 25 wt%, the composition The eutectic temperature will exceed 30 ° C, making the composition incapable of presenting a liquid state and not being applied to a damper. Therefore, the content of the aforementioned indium element, gallium element, and tin element is preferably controlled within the above range.

Further, in order to lower the eutectic temperature of the composition to 10 ° C to 30 ° C to maintain its damping characteristics, the composition may further preferably include mercury (mercury, Hg), bismuth (Bi), lithium. (lithium, Li), sodium (sodium, Na), potassium (potassium, K), rubidium (Rb) or cesium (Cs), at least one element, and its content is preferably from 1 to 5 wt%.

Another aspect of the present invention provides a damper using the above composition, which can be filled into a sleeve of a general damper by any conventional means to maintain a good damping force after a long period of operation. There is no damper that damps the decay phenomenon.

The manufacturing process of the composition and the damper of the present invention will be described below by way of an experimental example. However, the following description is only for explaining the present invention, and the manufacturing process of the composition and the damper of the present invention is not limited thereto.

First, indium, gallium, and tin having different ratios are placed in a melting furnace, and then the materials are fused by a high temperature or other means capable of achieving fusion in a vacuum environment, such as magnetic vibration, pressure, or the like. The composition of the present invention is obtained. The damper prepared by the above method is filled and sealed in a sleeve to obtain a damper.

The composition obtained by the above method was measured for its forward force and resistance by an atomic force microscope (AFM, model Agil, model Solver P47H, available from NT-MDT), and a contact angle analyzer (Model Angle FRA125) was used. The contact angle of the composition was measured, as shown in the first figure and the table below, respectively, for five different ratios of composition and the frictional resistance coefficient of the composition.

It can be seen from the above table that the friction resistance coefficient of the composition provided by the present invention is about 1.5 to 4, and the contact angle of the third composition ratio test is about 4.72 degrees (as shown in the second figure), as compared with Since the contact angle of the conventional damping oil is more than 40 degrees, it is understood that when the composition of the present invention is applied to the damper, it is not easy to be heated by the long-term action, and the damping force of the damper is relatively not attenuated.

In summary, since the composition is an inorganic substance, it is liquid at a temperature of 10 ° C to 30 ° C and has good viscosity, thermal conductivity and electrical properties, so when it is applied to a damper, the damper is not long. When the time is activated and the characteristic changes, or the viscosity is lowered due to the high temperature generated by the damper operation, the damping force of the damper can be maintained to avoid the occurrence of damping degradation.

Claims (10)

A composition having damping characteristics comprising: (a) 10% by weight to 40% by weight of indium (In); (b) 45% by weight to 80% by weight of gallium (Ga); and (c) 5wt% to 25% by weight of tin (Sn). The composition having damping characteristics according to claim 1, comprising: (a) 16 wt% to 26 wt% of indium (In); (b) 56 wt% to 75 wt% of gallium (Ga); and (c) 9 wt% to 18 wt% of tin (Sn). The composition having damping characteristics according to claim 1 further comprising a component selected from the group consisting of mercury (Hg), bismuth (Bi), lithium (Li), sodium (Na), potassium (K), ruthenium (Rb), and ruthenium. (Cs) at least one of the added elements of the group. A composition having damping properties as described in claim 3, wherein the additive element is contained in an amount of from 1% by weight to 5% by weight. A composition having damping properties as described in claim 1 which is liquid at a temperature of from 10 ° C to 30 ° C. A damper comprising a composition having damping characteristics as described in claim 1. The damper according to claim 6, wherein the composition having damping characteristics comprises (a) 16 wt% to 26 wt% of indium (In); (b) 56 wt% to 75 wt% of gallium (Ga); (c) 9 wt% to 18 wt% of tin (Sn). The damper according to claim 6, wherein the composition having damping characteristics further comprises a component selected from the group consisting of mercury (Hg), bismuth (Bi), lithium (Li), sodium (Na), potassium (K), and strontium ( At least one of the group consisting of Rb) and 铯(Cs) is an additive element. The damper according to claim 8, wherein the content of the additive element is 1 wt% to 5 Wt%. The damper according to claim 6, wherein the composition having the damping property is a liquid at a temperature of 10 ° C to 30 ° C.