Page 84 - LIFT VISION 39 IÇ SAYFA

SAFETY DEVICES

pany employees who will be relie- el core of the tension rope and the
ved from making adjustments and Figure 2: Z06-3-T speed regulator pulley diameters
supplying materials externally, and (Tandem) should be 300 mm, and the safety
the factory settings of the brake as- Sliding Brake System rope diameter should be at least 8
sembly will not be tampered with. mm in elevators with 10 or more
As far as I can follow in the sector, stops.
I think that part of the problem with
brakes is that this situation is not As an engineer working in the
followed. manufacturing sector, I think that
the cabin manufacturing compa-
The safety device must be main- nies should also manufacture the
tained according to EN 13015. To brakes to be used in the cabin.
summarize in general, dust clea- In addition, I strongly recom-
ning of the system should be done. mend that brake manufacturing
The system should be checked for companies accompany the Type
rust and corrosion due to possible Examination / Conformity Tests
humidity in the elevator shaft. In to be carried out by the Notified
cases where oil should be used, Body of the brakes they will de-
‘thin oil’ should be preferred. sign and certify. The manufacturer
should see on site that the braking
Brake block assemblies are given acceleration of the brake system
the same assembly numbers by the under test goes beyond the range
manufacturers. Brake blocks with allowed by the standard, or even
the same set number must be used in the value of this product is twice as much as the that the brake does not hold and the eleva-
same cab. Each safety device is adjusted and first one, i.e. 6184 kg, because it is a tandem tor crashes to the ground. The manufacturer,
sealed at the factory according to the conditi- product. Of course, tandem braking is not an who will better comprehend the dimensions
on of the load and rail. For safety reasons, it application that applies to every brake sys- of the danger and the frighteningness of the
is not desirable to break the seal and interfere tem. The Notified Body issuing the EU Type event, will have the opportunity to see many
with the brake without contacting the brake Examination Certificates of the brake must negative scenarios that may occur in the fu-
manufacturer. P, Q, P+Q, V rated operating approve this with Type Examination Certi- ture before the product is placed on the mar-
speed, whether the guide rails are machined ficates in order for the relevant brake to be ket. Moreover, there is no compensation for
or cold drawn, whether the surfaces of the tandem. a disaster that may occur after the product is
guide rails are dry or lubricated, must be set on the market.
and sealed by the brake manufacturers accor- The sliding brake system, which is a mecha-
ding to the data. nical system, can be mounted on the lower Bibliography:
or upper support beams of the cabin suspen- 1. 2014/33/EU Elevator Regulation
When determining the P+Q value, the P load sion. If there are accessible cavities beneath 2. TS EN 81-20:2020
is calculated in kg as the sum of the masses the shaft, the counterweight should also be 3. TS EN 81-50:2020
of the empty cabin and the parts suspended in equipped with a sliding brake system and a 4. Ministry of Industry and Technology letter
the cabin )such as flexible cable, etc.( carried separate set of regulators should be used to dated 27.08.2018 and numbered 30968416-
by the cabin and the balancing chain, if any. trigger this system. 622.03-E.29765,
Q is the car carrying capacity and the decla- 5. Sliding brakes in elevators and design
red load of the elevator is taken in kg. In order to provide the minimum tension of problems, Fatih C. BABALIK, Kadir ÇAV-
300 Nm required for the safety rope easily DAR
For example, the maximum P+Q value of and for its continuity, it is strongly recom- 6. Manufacturer Catalogs (Zorlu, Wittur, Dy-
the Z06-3 brake in Figure-2 for 16 mm thi- mended by the safety device manufacturers natech, Metroplast)
ck ‘machined’ and oiled guide rails up to a that the regulator lower tension pulley should 7. Changes in Safety Devices and New Stan-
nominal speed of 1.6 m/s is 3092 kg. The be weighted type and positioned as far as dards, Melih ZORLU, Elevator World Tur-
Z-06-3-T model in Figure-3 is a tandem set possible ahead of the pulley, if the shaft bot- key, July-August 2017
consisting of 2 Z-06 brake systems. The P+Q tom distance is sufficient; in addition, the ste-

84 LIFTVISION
4th QUARTER 2023