GP Girard-Perregaux released a prototype of Constant Escapement a few years ago, which shocked many watch art connoisseurs; GP Girard-Perregaux’s five-year research and development revolutionized the technology A field of technology that has never been involved in watchmaking, it is now officially assembled in the Haute Horlogerie series, writing an important chapter in the research on the stability of escapement systems.
Girard-Perregaux named Constant Escapement Constant Escapement to pay tribute to the founder Constant Girard-Perregaux, whose name is in keeping with the technical challenge that has plagued watchmakers for centuries-constant force By coincidence, Girard Perregaux was determined to develop a constant-power escapement technology with a revolutionary concept.
Five years ago GP Girard-Perregaux published a constant-power escapement that was exciting. The extremely lightweight escapement was not only beautiful, but also had great potential for practical application. It is the ultimate precision of mechanical watches pursued by the watchmaking industry in the century And stability, providing a new and reliable technical solution.
To understand the importance of constant-power escapement technology, first return to the basic principle of mechanical watch operation: the escapement structure regularly transmits the energy of the barrel to the drive wheel system and controls the speed of the pointer operation, just like a faucet controls water Throat output is the same.
的 The key to the entire power transmission process is not the escapement speed or wobble frequency, but its stability: whether the wobble frequency is three or four times or even a thousand times per second, the accuracy of the travel time ultimately depends on the wobble frequency and can maintain stability for a long time.
不少 A lot of escapement structures have appeared in the past few hundred years. It didn’t become mainstream until the launch of Swiss lever escapement technology. Most mechanical watches still use this technology today. However, the Swiss lever escapement has a disadvantage, that is, how much power is transmitted from the barrel. It can only send the same power to the balance wheel. The problem is that the power of the barrel is slowly consumed, and the stable power is precisely timed. The key is that the power decreases, and the balance of the balance wheel also decreases. As the watch lacks power, the accuracy of the travel time is difficult to maintain. This phenomenon can be said to be a mantra that troubles the watchmaker.
The principle of constant power escapement is that it can output stable power to the balance wheel no matter how much power is transmitted from the barrel. GP Girard-Perregaux’s revolutionary technology is to add a very small elastic silicon hairspring to the escapement system. It can store energy within a certain limit. When it approaches a stable threshold, the hairspring appears. The unstable state, and the energy is sent out in real time in the form of wave vibration, and it repeatedly provides stable and average power to the balance wheel.
You can understand this process visually: Hold a business card vertically with your thumb and forefinger, apply a little pressure to bend the business card into a left-opening bracket “(), and then apply pressure to the bent side to a certain limit. The business card will snap and bend in the other direction, and it will turn into the opposite right-closed bracket “”. Try everything.
This phenomenon is called buckling. GP Girard-Perregaux hairspring experts extended it to the concept of buckling hairspring: an elastic silicon hairspring as young as six points and one hair plays the role of energy storage. The wheel has very little power, and when it reaches the critical point, it bends to the other side and sends the power back to the balance wheel. This process is not affected by the change of the spring power, and the same power is output to the balance wheel every time.
Most of the constant power technology in the past is the average value of the total power over a period of time, but the Girard-Perregaux watch technology is a veritable constant-power escapement in real time, and it can be verified by laboratory test methods.
芝 GP Girard Perregaux’s constant dynamic escapement is a symmetrical structure, but it is not an aesthetic consideration. Instead, it can balance the power in the center of the balance wheel, so that the balance wheel can rotate completely smoothly.
两端 Both ends of the hairspring are fixed on the frame, and the hairspring and the frame are integrally formed by a silicon crystal. This structure can accurately connect the power contact points and bend the hairspring to the other side. Although the principle is simple, it requires extremely high accuracy in practice. Without silicon crystal technology and DRIE etching technology, it would be difficult to achieve. Girard-Perregaux collaborated with Swiss Electronics and Micro-engineering Centre in Neuchâtel, Switzerland. The watchmakers and physicists on both sides went through complex calculation procedures to determine the characteristics of the hairspring and the factors affecting the bending point, and finally decided to integrate them. The forming technology makes the hairspring vibrate as if floating in the air. Except for the moment of pushing and contracting, basically no friction occurs, so that the hairspring returns the power directly to the balance wheel.
The elastic balance spring is the heart of a constant dynamic escapement system, vibrating at a frequency of 3 Hz (21,600 times per hour); however, Girard-Perregaux watches have conducted other studies on the frequency of vibrations, but the purpose is not to simply challenge higher speed swing frequencies.
The two escapement wheels are quite different from the escapement wheels of the lever escapement system. The escapement wheel with a frequency of 3 Hz has three teeth and the escapement wheel with a frequency of 4 Hz has four teeth. The movement has multiple days of power and the dial has The linear power reserve display can show the efficiency of the escapement system for a long time; the movement power is provided by two parallel barrels, which includes a new patented design: the barrel cover and the pawl are integrally formed to make the best use of it. Movement space; each winding drum has two winding springs; in addition GP Girard-Perregaux has applied for registration of two patents, including the hairspring technology published in 2008, and the other for the first time in the flexible parts system (flexible system) with limit stops.
Although the balance spring and escape wheel are most ideally made of silicon, the final escapement wheel is made of other materials; the main body of the brass movement is treated with black PVD coating to add a sense of time; the modified structure of the movement has both a three-dimensional effect and See the excellent tradition of Girard Perregaux, for example, near the dial, the brand’s classic three bridge plywood is arranged in a new layout, and the back of the movement has two arrow-shaped plywood.
芝 GP Girard Perregaux has considered future maintenance when designing this escapement. The entire escapement structure is a module that can be handled by a designated watchmaker.
The first constant-power escapement watch
别 The design of the case with the revolutionary constant-power escapement movement is ingenious and perfectly shows the value of this innovative technology.
Girard Perregaux Haute Horlogerie The first constant-power escapement watch, combining cutting-edge technological achievements and time-honored design, and strictly adhere to the brand’s traditional design style; white gold case diameter 48 mm, curved ring Beautiful.
The dial layout emphasizes the structure of the butterfly wing frame of the constant power escapement system and the structure of the elastic hairspring. The hour dial is moved to the 12 o’clock position, with two spring drums on the left and right, and a linear power reserve display at 9 o’clock.
下方 Under the dial is the stage where the constant-power escapement is unveiled, swinging at a frequency of 21,600 times (3 Hz) per hour. The new arrangement of Girard-Perregaux classic three bridge splints can be seen through anti-glare crystal glass.
The thickness of the manual-winding movement is less than 8 mm, the case thickness is 14.63 mm, and the crystal glass back is set with 6 screws. You can see the three-dimensional movement structure and decorative beauty. It is equipped with a hand-stitched crocodile leather watch. Belts and discounts; belonging to Haute Horlogerie.
Girard-Perregaux Constant Power Escapement
Polished white gold case
Diameter: 48.00 mm
Bezel: Frosted Bezel
Table glass: curved anti-glare crystal glass
Crown: Platinum crown engraved with GP logo
Dial: Silver textured dial with rhodium-plated details
Pointer: Crown Princess
Case back: Crystal glass is densely set by 6 screws, carved by hand
Waterproof depth: 30 meters
IrGirard-Perregaux Movement MVT-009100-0007 manual winding movement
Movement diameter: 17 1/2
Swing frequency: 21,600 times per hour (3 Hz)
Power reserve: about 7 days
Gem: 28 pieces
Functions: hours, minutes, central seconds, linear power reserve display
Strap: Black alligator strap, discount