Hydraulic Elevator Components Flashcards

Flashcards covering the mechanical, safety, electrical, and hydraulic components of an elevator system as described in the lecture notes.

Guide rails

Steel rails that run the height of the shaft. They keep the car moving straight up and down.

Guide Shoes

Attached to the car and slide on the guide rails. They keep the car centered and reduce sway.

CAR(CAB)

The passenger compartment where people ride.

Door Interlock

A safety device that looks the landing door. It only opens when the car is present the door cannot open unless the car is at that floor.

Traveling Cable

A flexible cable that moves with the car. It supplies power and signals to the car.

Landing Door

The door at each floor (landing).

Pit ladder

Allows maintenance personnel to climb in and out of the pil.

Car Door

The door on the car that opens and closes for passengers

Door operator

A motorized system (usual on top of the car) that opens and closes the car doors.

Hall Button (hop)

The call button outside the elevator used to request the car.

car operating panel (cop)

The buttons inside the car used to select floors and operate doors and other functions.

Position Indicator

Shows the currert floor and direction of travel.

Overhead limit Switch

Stops the car if it goes too high in the shaft.

Pit Switch

Stops the car if it goes too low in the shaft.

Buffers

Cushions the car if it goes too low in the pit.

PIT

The space below the lowest landing. It houses the pitton, buffer, pit switch, etc.

Overspeed Governor

Detects if the car is moving too fast and trippers the safety system to stop it.

Final Limit Switch

Stops the car if it reaches the top or bottom extreme position.

Saftey gear

Mechanically stops the car on the guide rails if car moves too fast.

Slack rope Switch

Detects if the cable becomes slack (loses tension) and stops the elevator.

Saftey circuit

A series of safety devices wired together. if any one opens, the elevator stops.

Door Lock (car)

Keeps the car door locked when the car is moving.

Door Lock (landing)

Keeps the landing door locked when the car is not at that floor.

overload Sensor

Detects if the car is overloaded and prevents movement.

Emergency Stop

Stops all elevator operation immediately when pressed.

Earthquake Sensor

Detects earthquakes and brings the elevator to the nearest Boor.

Power Supply

Converts incoming man power to stable DC power for the system.

Controller

The "brain" of the elevator. It processes inputs and controls all operations.

Circuit Breaker Fuses

Protect electrical circuits from overcurrent or short circuits.

Terminal Blocks

Connect and organize electrical wires.

VFD

Controls motor speed smoothly (used in some systems).

Battery

Provides backup power for emergency lowering or alarms.

Contacters Relays

Electrical switches that control power to motors and other devices.

Transformer

Stops down high voltage to a lower voltage for control circuits.

Vent/Breather

Allows air in and out of the tank as oil level changes.

Fill Cap/Strainer

Used to add oil to the oil tank and filter contaminants.

Sight Glass

Shows the oil level in the tank.

Drain plug

Used to drain old or contaminated ol from the tank.

Hoistway Light

Illuminates the hoistway for safety and inspection.

Machine Room Light

Lights the machine room for maintenance work.

Fire Switch service

Returns elevator to a designated floor during fire emergencies.

Inspection Box

Allows technicians to run the elevator in inspection mode.

Valve manifold

Controls the direction speed and stopping of the car by controlling oil flow.

Electric motor

Provides the mechanical power to drive the hydraulic pump.

Pump

Converts mechanical energy of the motor into hydraulic energy.

Relief valve

Protects the system from over-pressure by diverting oil back to the tank.

Oil Reservoir (tank)

Stores the hydraulic oil used in the system.

Return Line Fliter

Cleans the oil as it returns to the tank.

Check Valve

Allows oil to flow in only one direction (stops it from flowing back).

Pressure Gauge

Displays the hydraulic pressure in the system.

Solenoid valve

Controls the direction speed and stopping of the car by controlling oil flow.

Oil Cooler

Cools the hydraulic oil to keep the system running property.

Power Unit Base

The base or tank tha supports al HPU component.

Cylinder

A steel tube that holds the hydraulic oil. The piston moves inside it.

Piston/plunger

The solid steel rod that moves up and down inside the cylinder. It pushes the car up.

Piston Seal

Seals around the piston to prevent oil from leaking past it.

Piston head

The bottom part of the piston that separates the oil from the return side.

Cylinder Seal

Seals between the cylinder and the subide to prevent oil leakage.

Fluid (hydraulic oil)

Tarots the power in the system. It also Lubricates and cool.