This topic within six months actively exaggerated media. Sometimes, loyal, often aggressively. Many doubt, in fact incorrect statements, competitors anonymous letters signed by «a group of specialists.» Of course, leave unanswered is a small sea of passions, we can not. And try to briefly explain the concept of a new generation of users distinguish these escalators.
A notable and important feature of the passenger escalator users distinguish these is that the standard 7.5 m diameter tunnel to put them on one more than the old type of escalators. They were called uzkobalyustradnymi, with the prefix «narrow» in some media interpreted as an escalator step with a smaller width. However, the escalator step for users distinguish these has a standard width of 1 m underground. Decreased only the distance between adjacent escalators in the passenger area, that is the part of the balustrade, which previously comfortable feel light (now they had to move to the ceiling of the tunnel). The distance between the escalators in coverage — 500 mm — is the same as when the same tunnel in three escalators old type.
Such construction of the brake system does not fit the old norms. Domestic «Rules of construction and safe operation of escalators PB 10-77-94» prescribe to have the service brake on the input shaft end and the alarm on the main shaft of the escalator — where the devices are located in the old-fashioned domestic escalators. Other designs developers PB 10-77-94 in the 80s of the last century were not just yourself.
This became a stumbling block in the formal delivery of new escalators in operation, requiring lengthy approvals with expert organizations and Rostekhnadzor. Although such problems in the world does not exist anymore. Regulations drawn up in such a way as to ensure the safety of passengers and staff, and not to limit the kinds of constructive machines. In the introduction to the European Standard E-115: 1995 and recorded (Sec. 0.3):
«The objective of this standard is not included to prevent the development of new escalators and passenger conveyors. The new design should, as a minimum, meet the safety requirements of this standard. «
Therefore it is not stipulated in the E-115 installation location of the service brake and on the additional (not emergency) brake states that it must act «on nefriktsionnuyu part of the drive stages» that is, between the additional brake and traction chains should not be belts, friction couplings, etc.
Brakes escalator users distinguish these fully complies with the E-115 and the Russian version of «Guidelines for the design and installation of floor escalators and passenger conveyors RD 10-172-97» operates by analogy with the braking system of modern elevators, it requires significantly less effort when servicing.
VFD allows you to disperse and stop the ladder painting with passengers on a given law, regardless of passenger load, provides the ability to change the nominal speed and the desired speed of the repair PB 10-77-94 (0.04 m / s) without auxiliary drive. Recovery system saves about 30% of electricity, returning it to the network while working at escalators descent. The professional electricians expressed doubts about the possibility of starting the escalator users distinguish these on the rise with a maximum working load of the variable frequency drive. But freight testing and subsequent operation of escalators dispelled doubts. 8 escalators are working successfully in all modes of passenger traffic in the extreme.
Creation of a new technology — not an easy process. «Somnevateley» and spiteful critics always tend to be always greater than «doers». It is very important that the St. Petersburg Metro saw the benefits of new escalators installed them on transitions habitats «Savior» in the heart of the capital of the server. While management subway understood that the new machines, and in this case fundamentally new, is not without design and manufacturing defects.
Much has been speculation in the media that the opening of the station was postponed several times. The experts RTN and escalator service carefully angling for all the shortcomings — for which they thank you very much.
Today «Spasskaya» lets say — users distinguish these escalators and took the first step into a new escalators-made structure. Conducted adjustments as a result of start-regulation and trial operation, some modified components and spare parts. Measures are taken to reduce noise and vibration, but it is the traditional stages of the development of new technology.
Another important result of the «Saviour» — the country has a new full-fledged manufacturer of escalators JSC «Plant» Universalmash «» — a subsidiary of the St. Petersburg «Kirov factory» team which traveled all the cycle of the escalator from the design documentation, design and manufacture equipment and test stands by manufacture, assembly, installation, testing and commissioning of escalators at the site of application to service eight escalators in the period of trial operation.
Simultaneously with the «Saviour», where there are escalators lifting height of 11.6 and 17.3 meters, customers independently completed the installation and commissioning performed two escalators users distinguish these, 40 at the Museum of the Yangtze River in China. The height of these machines 40 m.
In the nearest plans of the plant — the replacement of escalators at the station «Narva» (height 40.8 m), one of the oldest in St. Petersburg. Here, in the old tunnel to be installed four new escalators instead of three old, hereinafter — the development of heights up to 75 m. The designers are working on the modification of the escalator users distinguish these, including with remote drive, which is more familiar to the escalator services subways, but does not increase the transverse dimensions escalator.