Gravity has any influence on precision of ladies watches walking?

1, Balance wheel hairspring system of ladies watches is imbalance, namely the phenomenon that system's center of gravity and the pendulum shaft axis doesn’t overlap.

Usually balance wheel hairspring system quality, for the most part, focused on the wheel itself, and the thickness of it with diameter less than many, so the balance wheel balance spring system imbalance, also is the center of gravity of the thickness of the deviation will occur on a balance wheel in the plane of symmetry. Owing to the eccentricity of the system will directly affect the motion of the balance wheel cycle, cycle increased, ladies watches walking will slow down; On the other hand, the cycle reduced, ladies watches will be faster as well. Worse by methods of static balance and dynamic balance as far as possible the balance wheel of eccentricity reduce to minimum, the imbalance of cycle effect is to reduce the system the most direct and effective method. However, it is impossible to make absolutely no eccentric ideal it.

2, Balance spring fixed gravity effect, namely its gravity affect cycle.

Because the balance spring of ladies watches in commanding can't keep the shape of spiral of Archimedes, and therefore the focus of it in motion will be effected according to the tracks are very complicated. Balance spring when the pendulum shaft placed additional torque developed by the center of gravity of pendulum shaft is superimposed on the balance spring torque directly. Due to focus on pendulum shaft of additional torque is nonlinear, and thus will make the system have isochronous error.

3, Horizontal and vertical shaft transformation position amplitude changes

Pendulum shaft vertically, with journal of end face and bearing contact, and in the horizontal, with journal of cylindrical and bearing contact. Small friction torque of the former than the latter, this can make pendulum shaft vertically when the balance wheel of high amplitude than the horizontal. Because any the system of ladies watches have some time difference, such as amplitude changes as a result, will cause a cycle change accordingly.

4, Escapement of escapement gear shaft and a fork shaft and bearing in the axial or radial clearance

When vertically, journal of end face and bearing axial clearance, contact when horizontal, journal of cylindrical and bearing radial clearance, contact causing escapement working status changes, has bit error.

5, (gap between clip and hair spring affect cycle.

Common (system is through the toggle (adjust the speed. Due to strike (the balance spring do not get stuck with clip, hair spring and clip should have a certain gap between. When the ladies watch is in different position, balance spring (clip in the position will be changed for clearance, makes the hair length change of the practical work, leading to bits.

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Created on Dec 31st 1969 18:00. Viewed 0 times.

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