External influences
Is the impact from various external clocks, watches and clocks, depending on the working environment. Often used measures are: shock-proof design, waterproof design, magnetic design, additional protection shell. Precision navigation is often used on the bell joint, so that navigation can be maintained in the clock in the rough level.
Friction
Friction usually have both positive and negative effects, it has the positive side, such as friction points wheel, automatic watch springs and the friction between the box section, self-locking screws, etc.; the other hand, the friction will lead to lower transmission efficiency and parts of the friction loss, thus affecting the timing. Common solution: to improve the lubrication condition, according to different requirements, use of different lubricants; with jewel bearings or pads; improved gear tooth surface conditions, including the use of scientific and increase the conjugate tooth surface finish, etc., but in general Gear surface without lubrication (In that case, Viscous oil could be higher than the resistance generated by friction).
Speed needle
Speed when the needle is an easy-economic structure of the school, but the theory and practice have proven to affect the system, etc., which also may have potential difference, the random timing error is relatively large, can not compensate for or offset. Solution are: minimizing the speed inside and outside the needle spacing; but the best way is to not speed needle, by adjusting the inertia of the balance wheel to regulate the speed, such as Rolex's Mircro stella conditioning.
Escapement
The major impact of escapement is the energy transfer process of the balance spring system, the impact of balance spring system only in the case of free vibration in order to maintain a fixed oscillation frequency, it is clear escapement of the energy transfer process oscillation frequency. Theory suggests that the balance transfer process close to equilibrium, this impact will be reduced. Solution are: the use of sophisticated escapement, such as the claw escapement, it is the energy transfer process occurred in the equilibrium point, red point of transmission is very small, the impact is relatively small, but it also makes one-way transmission impulse balance spring system has more free oscillation space (on this point, the relative error can be reduced by half!). Of course, the Swiss lever escapement, a technology is good, easy to adjust the merit of being the mainstream of the international mechanical watch escapement, but in the design, should be washed to minimize the angle of transmission. Swiss Omega company to reduce the escapement on the basis of time, the introduction of the coaxial escapement, this is a British invention of Dr. George Daniel, but the principle point of view, it is a lever escapement and claws escapement mixture.
Temperature
Temperature mainly in two aspects: First, temperature changes the length of the work will be gossamer, while changing the balance wheel of inertia, can directly affect the timing accuracy; Second, temperature changes will affect the viscosity of lubricating oil, affecting transmission efficiency, thus affecting the timing. This can take the following approach: using open bi-metallic temperature compensation balance spring system; use of special alloy materials and the balance wheel hairspring so that the temperature in the work area (8 ° -38 °) have a certain temperature compensation; use of mobile speed needle temperature compensation. Standard lubricants, for extreme temperature conditions, such as Omega moon table, with no lubrication or solid lubricant.
Magnetic field
Most gossamer magnetic fields can change the elastic modulus, also under the action of springs in a magnetic field distortion, resulting in additional stress, serious, the magnetic field can lead to gossamer adhesions, serious impact on travel time. The solution is: using magnetic materials.
Hairspring balance
General swing box springs, and its center of gravity with the balance wheel swing angle change, under gravity, it will produce the position error. The solution is: The Breguet balance spring, the Center contracted with the swing angle does not change the focus; by Phillips terminal curve and the upper and lower cylindrical symmetry with gossamer; using linear springs; history gossamer ball was used, superior performance, but the process is poor , very few practical applications.
Balance wheel balance
Balance wheel components directly affect the balance bit poor, the balance wheel static balance component is a basic requirement.
If the above factors are more ideal, Shiyou go watch more stable, through the watches of the dynamic balance can be integrated to improve the travel time performance. There is a very special way: the principle is when the balance wheel swings up to 220 degrees, all delivered to swing the momentum wheel has no effect on the frequency, it has been installed on the use of the balance wheel escapement force agencies to control the swing 220 near the site, which may well be a method.
Article Source: http://www.watchreviewcenter.com
Relate Article: Versace V Master Mens Watch
No comments:
Post a Comment