Category Archives: Technology

How to manufacture escalator handrail belt and how long its service life?

  1. Production principle of escalator handrail belt:

Escalator handrail belt is through to the already have preliminary shape heating raw material, after a period of time under the high pressure heat vulcanization, make raw material molded into a stable shape of the handrail can use for a long time.

The raw material is in the shape of strip layer, which generally includes organic rubber and plastic layers such as adhesive layer, polyurethane layer, tensile steel wire layer and special adhesion layer on surface. With polyurethane organic matter such as rubber layer is a special spiral screw rubber extrusion type extrusion, while tensile steel wire layer is by cutting machine rolled the wide contain plastic wire length, cutting out by bonding, can turn the layer growth in raw strip. Escalator is common black handrail, with the development of customer demand, began to appear red, green, blue, yellow and so on different color handrail, these armrest different because of mixed with different additives. Different elasticity, different abrasion resistance, different tensile fatigue strength and environmental protection. The escalator handrail can be divided into three parts according to the position: pump station part, main engine part, and mold core linear guide rail oil motor chain drive part.

 

  1. Basic performance parameters of escalator handrail belt:

Automatic handrail with four cylinders total pressure:    100~200   T

Vulcanization time of escalator handrail is:    5~20  min

Escalator handrail belt material vulcanizing temperature :   180  ℃

The escalator armrest belt presses down at a fast speed of:   30  mm /s

The total power of the escalator handrail drive motor is:    22   KW

Escalator handrails with a large vulcanization length of:   3000  mm

The moving speed of the die core of escalator handrail is:   18300-30,000 mm /min

Size of escalator handrail equipment (length, width and height):  12100*1900*2800 mm

The total weight of escalator handrail equipment is:    18   T

 

  1. The service life of escalator handrail belt

In general, the indoor escalator handrail belt service life of 10 years or so, outdoor escalator handrail is normally only used 6 years or less time, the escalator handrail will appear wear fracture, in these cases need to do replacement timely.

ELEVATOR VIP supplies all various of escalator handrails, for more please visit here: escalator handrails

WHAT’S FUNCTION DOES THE ELEVATOR COMPENSATION CHAIN DO?

Speaking of the elevator, we are familiar with this equipment around our daily life. Elevator balance compensation chain engaged in the work of the elevator related aspects and never contact with people who work in this industry in today, today we will introduce one often use the elevator components – the elevator balance compensation chain.

Elevator is a kind of vertical lifting equipment, which has been widely used in today’s high-rise buildings. Elevator balance compensation chain is a compensation device on the elevator. Its application guarantees the safe and stable operation of the elevator.

Often found in the elevator in the elevator using run time car with abnormal sound, a main reason to lead to the phenomenon – length compensation improper selection or do not conform to the requirements, analysis, and the right to choose for chain compensation for the elevator.

Elevator chain that is the weight of the steel wire rope compensation, when the elevator on the top floor, steel wire rope on the heavy side, on the heavy side more than the weight of the steel wire rope when the elevator at the bottom side of wire rope in the car ,which side e is more than the weight of the steel wire rope with compensation chain can balance the gap between the general compensation chain is more than 30 m.

The elevator balance chain compensation chain is commonly used in the elevator. Its structure is wrapped with PVC rubber composite material, which is used to compensate the weight of steel wire rope and make the elevator run smoothly. When the elevator is on the top floor, the steel wire rope is on the opposite side of the weight. When the elevator is on the bottom floor, the steel wire rope is on the side of the car, and the weight of the wire rope is added to the side of the car. The good quality compensation chain can make the elevator run safely and smoothly and achieve quiet and comfortable effect.

Elevator balance compensation chain guide role mainly balance car and weight on both sides of the main cable, cable cars tail, the weight of the compartments tail elevator on both sides of the main cable, cable chain and compensation of equal weight variation, so choose good compensation chain. The compensation is chain can balance this section head, to compensate dynamic balance, because of wire rope has weight, along with the up and down the elevator movement, will produce dynamic imbalance, so only USES compensation chain.

In general, the elevator balance compensation chain first according to the weight of the traction rope chain minus the weight of the accompanying cable chain to determine the weight of the compensation, and then determine the weight per meter of compensation chain, from manufacturer’s compensation chain varieties selection. Professional compensation chain manufacturers generally have flexible weight distribution options. A certain error range is allowed in calculating the weight of the compensation chain per meter. There are two choices of elevator balance compensation chain within the error range, two compensation chains with lighter weight per meter can be selected, and one compensation chain with heavier weight per meter can be selected.

Lecture on elevator parts and elevator knowledge Elevator Safety Gear & Reducer

Lecture on elevator parts and elevator knowledge

Lecture on elevator parts and elevator knowledge Elevator Safety Gear & Reducer

  • Elevator Safety Gear & Reducer

Elevator safety gear is a mechanical device, which stop the car (or counter-weight) from moving. Safety pliers are required for any manned car suspended by a wire rope or chain. When there is a passageway or space under the bottom pit, a safety clamp is also required for the weight. The safety clamp is set on the beam under the cage frame and ACTS in pairs on the guide rail at the same time.

A speed limiter is a device that limits the speed of a car (counter-weight), and usually installed in the machine room or at the top of the well. The tension device is placed in the bottom pit.

Safety gear and speed limiters must be combined to work.

 

  1. Elevator Speed limiter (Reducer)

Speed limiter can be divided into swing hammer type and centrifugal type according to its action principle.

Hem hammer speed limiter is to use the CAM on the rope wheel in contact with the roller at the end of the pendulum in the process of rotating, the frequency of the pendulum swings associated with rope wheel speed, when the vibration of the pendulum frequency exceeds a predetermined value, the pendulum of the ratchet into rope wheel stop stop claws, so that the speed limiter to stop running.

The speed limiter of centrifugal structure can be divided into vertical axis rotating type and horizontal axis rotating type. It is characterized by simple structure, high controllable ability and small space required for installation.

When designing or selecting, the following problems should be noted:

1). Speed limiter operating speed

2). Pretension force of speed limiter rope

3). Adhesion of the speed limiter rope to the rope wheel or the tension force of the speed limiter during operation

4). The response time of the limiter action should be as short as possible.

 

  1. Instantaneous safety gear

It features a short braking distance and a strong impact on the car.

Divided into several categories:

Wedge type instantaneous safety pliers

Eccentric block type instantaneous safety clamp

Roller type instantaneous safety pliers

 

  1. Progressive safety gear

It is characterized by elastic clamping of the clamping body, long stopping distance and stable car.

What are the elevator safety circuit switch parts?

In order to ensure the elevator running safely, there are many safety parts on the elevator. The elevator run based on each safety component in normal condition, otherwise it will be stopped. The so-called safety circuit is to install a safety switch in each safety elevator part, all safety switches are connected in series, controlling a safety relay. Only when all the safety switches are on, the safety relay is closed, and the elevator can run electrically.

Safety component switch of common elevator safety circuit:

  1. Speed limit switch (including speed limiter cut rope switch) – when the elevator at a faster rate than the rated speed value must be at least equal to the rated speed (115%), its action can lead to safety clamp work safety device.
  2. Maintenance switch — divided into control cabinet maintenance switch, car maintenance switch and car top maintenance switch. The three repair switches lock each other to prevent wrong operation and ensure the safety of maintenance personnel.
  3. Bottom pit buffer switch — this device is located at the bottom of the well path and is set at the bottom limit position of the car and the counterweight stroke. In the buffer (an elastic buffer safety device used to absorb the car and against heavy kinetic energy). After the action, the elevator cannot operate normally until it returns to its normal elongation position.
  4. Upper and lower limit of interlock switch, when the car running beyond magnetic induction device, flat layer in capsules or have not contact with buffer before the weighing device, forced to cut off the main power supply and control power of the safety device of automatic reset. The device is located as close as possible to the end of the station when working without error in the dangerous position of movement. It shall operate in the cage or before heavy (if any) contact with the buffer and maintain its action status during compression of the buffer. For the forced drive elevator, the limit switch is used to cut off the power supply circuit of the motor and brake. The elevator cannot resume operation automatically after the limit switch action.
  5. Safety clamp switch — check whether the speed limiter is operating. When the speed limiter moves, then a mechanical safety device that keeps the car or the car in a static state and can clamp the guide rail.
  6. Safety window switch — means that the car safety window is equipped with a safety device for manual locking. If the lock fails, the device can stop the elevator. The elevator will not be able to resume operation until it is re-locked.
  7. Door and door interlock switch — door and door of the hall are locked after closing, and the control loop is connected at the same time. The safety device of mechanical & electrical interlock safety device can only operate the car. Its function is that when the elevator car stops at a certain floor station, the door of the other floor station is effectively locked, and if the elevator is opened, it cannot start or keep running normally.

What are the factors influencing the elevator traction machine?

Elevator traction machine is the power of the elevator equipment, and call it is the host; the main function of the elevator traction machine is through the transmission and transmission power to keep normal operation of the elevator, what factors will affect the normal operation of the tractor when it is used? Refer to below:

 

  1. The balance coefficient. We know the capsules and traction is for heavy gravity jointly produced mainly by traction rope, acting on the rope tractive sheave groove keep capsules weight and the weight of the payload balance, make the normal operation of elevator, reduce some of the power consumption of transmission device.
  2. The influence of the equivalent friction coefficient” f “and the shape of the rope groove on the elevator traction machine are also relatively large, with different friction coefficients and varying degrees of influence.
  3. Traction rope tractive sheave on the angle of the traction steel wire rope groove of the contact arc, the size of the friction Angle, the greater the corresponding bigger, so that the elevator safety line will be as high.

How to choose and buy elevator parts correctly?

Along with the development of the city, for some of the high-rise building, if the use of simple stair brightness caused a lot of trouble for people, and people will waste a lot of time, therefore, the emergence of the elevator for people to solve the problem of the stairs, the elevator is not only has the characteristics of simple operation, fast, and it is very convenient in use, the fittings of elevator running is mainly used to help the elevator components, the operation of the elevator depends on the use of the elevator parts, as a result, the quality of elevator parts for elevator has important influence and role, and therefore, when the elevator parts of choose and buy, should how to choose:

  1. There are many different specifications for the selection of elevator parts, so the selection should be made according to the load capacity and model of the elevator, so that it is more convenient to use
  2. When choosing the elevator parts, had better not choose the poor quality of the parts, poor quality of the product when use may cause a lot of trouble, and no good product service life long, and some of the products are special, therefore, when making purchase better pay attention to the place, so that can save time for replacement.

Some Main Technical Parameters of Escalator You Should Know

Rise Height: generally within 10 meters, special conditions can reach tens of meters.

Angle: general for 30 °, 35 °

Speed: generally 0.5 m/s, some ladders can reach 0.65 m/s, 0.75 m/s.

Step Width: 600 mm, 800 mm, 1000 mm.

Theoretical transportation capacity: according to the speed of 0.5 m/s, the conveying capacity of different cascade width is corresponding to 4500 people/time, 6750 people/time, and 9000 people/time.

 

Execution standard

 

Gb16899-2011<< safety specification for manufacturing and installation of escalators and automatic sidewalks

JB/ t8545-2010 “escalator cascade chain, accessories and sprockets”

What is the elevator guide rail of Elevator Spare Parts?

Elevator guide rail is the safety track of the elevator running up and down in the well road; and is also one of the elevator spare parts. It can be known that the guide rail is be installed on the hoistway wall; and be fixed and connected between guide rail bracket and rail support on the hoistway wall. The common guide rail for elevators is ‘T’ shaped guide rail. For this kind of elevator parts, it has the characteristics of high reliability, high safety and low security. The guide rail plane must be smooth, with no obvious uneven surface. Due to the guide rail is shuttle track for guide shoe and safety gear of car, so the clearance must be kept during installation. The rigidity of guide rail cannot be ignored, because it will be born import duty for stop running when elevator happens the speed of the accident.

Continue reading→

How long does the elevator steel belt useful life of OTIS Gen2?

OTIS GEN2 elevator traction refers to the scrap basic standard of steel belt.
1. The design life of the steel belt is 20 years, which is 2-3 times of the traditional steel wire rope. It is recommended to conduct a comprehensive appearance inspection of the steel belt at least once a year during the design life cycle of the steel belt.
2. If there is no abrasion or damage to the steel core in the cladding layer and the steel belt real-time monitoring alarm device without abnormal alarm, then the steel belt will be recommended to be scrapped after 20 years of use.
3.Such as found in the routine maintenance of steel belt real-time monitoring alarm device has the abnormal alarm but did not stop running , need to check the steel belt monitor alarm device whether it is abnormal. If the belt monitor alarm device itself without exception, we suggest replacing the steel belt immediately.
4. If the steel belt monitor device alarming in real time and the elevator stop running. We should scrap and replace the steel belt immediately if the elevator does not re-serve in any way.
5. One of the following situations should be forced to scrap and replaced.

How long does the elevator steel belt useful life of OTIS Gen2?

Steel cords breaking through polyurethane.

How long does the elevator steel belt useful life of OTIS Gen2?

Wear marks, visual signs of cord imprints from exterior.

Elevator accessories – selection of steel rope

In order to be safe, the hoisting steel rope of the elevator is used with special or no. 1 steel wire, and its steel wire diameter is limited to between 0.3 and 1.3mm. The hoisting rope of the elevator is seru (X type) and warrington (W type). At present, the domestic elevator generally uses the silu-style 8 or 6 steel rope hauling steel rope, among which 8X(19) has more applications.

Elevator accessories - selection of steel rope

Elevator parts – selection of steel rope

1. Example of steel rope mark identification.

1000kg of passenger elevator to the rated load, for example, SCH elevator traction rope with 8 X (19) – 16-140 right hand in, eight for the line number of shares, X is west lu type, (19) for each strand of wire number, 16 for SCH elevator traction rope nominal diameter (mm), and 140 for SCH elevator traction rope tensile strength (KGF/was), the right to pay for steel wire strand and strand in line right direction twist system. The domestic SCH elevator traction steel rope is right handed.

2. Steel rope core

SCH elevator traction steel rope was used for the oiled fiber rope, rope support and fixed rope stock position so as to improve the contact between the steel rope, slow down the impact load, fuel storage pool role for SCH elevator traction steel rope of lubrication oil source for a long time, make good lubrication performance of the steel wire.

3. The structure and characteristics of the siu-type (X) SCH elevator traction steel rope.

The structure and characteristics of the siu-type (X) SCH elevator traction steel rope.

SCH elevator traction rope in strands of the cross section of a share to 1 + 9 + 9, namely core plus the first layer and the second layer, a total of 19 roots of steel wire: center wire 1 root, φ1.2 mm, inner layer steel wire 9 root, φ0.6 mm, outer wire 9 root φ1.05 mm. The outer diameter is larger than the inner diameter, so it is also called the outer rough elevator to drag the steel rope. It is characterized by the same number of steel lines in the inner and outer layers of each share, but the diameter is different, the outer layer is embedded in the inner cavity of the inner layer, the twisting distance of the multi-layer steel wire is equal, the structure is tight and strong, and it is not easy to open the volume. The outer thick steel wire increases the wear resistance; the inner layer fine steel wire enhances softness, which is advantageous to the sliding of the bending moment, thus improving the flexibility and service life of the elevator traction steel rope. Between the two layers, the steel rope is in contact with the steel rope, and the fatigue resistance of the steel rope is good. The resistance of the steel wire is good, the contact area is increased and the contact stress is reduced.