全部博文（242）
分类： Mysql/postgreSQL
2009-04-15 11:07:25
The application scope is very broad, varietyvery many, may according to the vibration principle, the structure andthe use characteristic classification. May divide into the usefrequency lower mechanical vibrations according to the vibrationprinciple , like pendulum clock, balance wheel clockand so on; Using frequency higher electromagnetic oscillation andquartz vibration , like synchronous motor clock, replica and so on; May divide into the mechanical typeaccording to the unique feature, like the mechanical alarm clock, isautomatic, the calendar, the double experience, hits and so on reedmanipulator ; Electricity mechanical type, likeelectricity pendulum clock, electricity balance wheel and so on, like balance wheel electron replica watches,tuning fork electron , indicator type and digitaldemonstration type quartz electron and so on.
Machinery has the many kinds of structural style, butits principle of work basic is same, all is by the velometer, the indicator is and on the strip dials theneedle is and so on partially is composed.
Machinery using the spiral spring took the power the department, passes through group of gears to compose impels the velometer work; Again in turn controls by the velometer rotational speed; also leadsthe indicator organization during impetus velometer, the rotational speed is controlled to the velometer, thereforethe indicator can plate instruct the time according to the certainrule in replica on the watch; On the strip dials the needle departmentis the applied spiral spring or moves the indicator the part.
In addition, but also has some attachment organizations, may increase the function, like on the automatic striporganization, the calendar (double experience) the organization, isnoisy when installs, the month instructs with the survey time intervalorganization and so on.
?the department is the storage and the transmission work energyorganization, usually by outside the strip box wheel, the strip lid,the strip axis, the spiral spring and the spiral spring the hook iscomposed. Spiral spring when free state is a helix or the S shapespring, its inner end has an eyelet, the set in on the strip axishook. Its outside end passes outside the spiral spring to hook, hookon strip box turn of endophragm. When on strip, dials the needlethrough on strip is causes the strip rotation of axis the spiralspring on the strip axis. The spiral spring elastic functioncauses a strip box turn of rotation, thus actuates.
is passes on department's energy to avelometer gear, it is by two turn (central ring), three turn(turn), four turn (a second wheel) and the escape wheel tooth axis iscomposed, turn of piece is the drive gear, the tooth axis is thedriven gear. Replica the watches tooth profile major part isacts according to the theory cycloid the principle, the processrevises the revision cycloid tooth profile which manufactures.
the velometer is composed by the escapement mechanism and thevibrating system two parts, it depends upon the vibrating system theperiodic vibration, makes the escapement mechanism to maintain preciseand the regular intermittent motion, thus obtains the velocitymodulation function. Forks the tile type escapement mechanism appliesthe broadest one kind of escapement mechanism. It by the escape wheel,forks, the double disc and the spacing nail and so on iscomposed. Its function is department's energy transfer for thevibrating system, in order to the maintenance vibrating system makesthe vibration, and transmits the vibrating system vibrationnumber of times for the indicating mechanism, achieves the measurementtime the goal.
The vibrating system mainly by outside the balance wheel, the pendulumshaft, the gossamer, the activity, the speed needle and so onis composed. The gossamer inside and outside end separately fixes atthe pendulum shaft and suspends on the clamping plank; The balancewheel deviates the external force when its position of equilibriumstarts to swing, the gossamer is then reversed produces the potentialenergy, is called restores the moment of force. Front the escapementmechanism completes states two movements the processes, the vibrationis under the gossamer potential energy function, carries on thereversed direction to swing completes another half period ofvibration, this is machinery when the revolution velometer unceasingly with repetitive cycle work principle.
On the strip dials the needle department the function is on the stripand dials the needle. It by , the vertical wheel, themeeting and parting turn, the reed, pulls thefiles, the pressure reed, dials the pin gear, the cross wheel, whenthe wheel, the split wheel, the big steel wheel, the young steelwheel, the thorn pawl spring and so on is composed.
On the strip and dials the needle all is realizes through thepart. When on strip, sets up turn and the meeting and parting wheel isat meshes the condition, when rotates, a meeting and partingturn of impetus sets up the wheel, stands turn passes through thesmall steel wheel and the big steel wheel, causes the strip axis spiral spring. prevents the big steel wheel to reverse.When dials the needle, pulls out, pulls the files in to pull onthe files axis to revolve and the impetus, causes themeeting and parting turn and sets up the wheel to withdraw, with dialsthe pin gear to mesh. This time rotates then dials the pin gearleads through the cross wheel when turn and the split wheel, achievedadjusts the hand of a clock and the minute hand goal.
Replica the request is in luck accurately, stable is reliable.But some internal factors and the external environment condition canaffect to be in luck the precision. The internalfactor including each composition system structural design, theoperating performance, selects the material, the processing craft andthe assembly quality and so on. For example, the spiral spring momentof force stability,? the work stability, the velometeraccurate and so on all affects is in luck the precision.
The external environment condition including the temperature, themagnetic field, the humidity, the barometric pressure, the vibration,the collision, uses the position and so on. For example, thetemperature change can cause in the lubricating oiland the balance wheel gossamer performance change, thus causes is inluck the performance change; When the environment magnetic fieldstrength is bigger than 60 oersteds, can cause the partial componentsmagnetization to walk slowly; The humidity congress causes partialcomponents oxidation and corrosion and so on.
