1. Elevator Hydraulic Cylinder Manufacturers
2. Hydraulic Elevator Systems
3. Pump For Hydraulic Cylinder Elevator Parts

Modernizing your hydraulic elevators is often necessary to bring the systems up. A standard power unit consists of a tank, pump, motor, control valve, and silencer. The jack assembly components to determine if a hydraulic jack replacement. The Unseen Risk. Hydraulic Elevator Cylinder Upgrades. Inside the cylinder equipped with a small relief orifice. The orifice is. As an oil return pump, returns. (ELEVATOR WORLD, December 2010) gave insight into the selection of components like the pump, motor, flow control valve, cylinders and pipe rupture valve. This concluding article will serve as a guideline in the selec-tion of components such as the hy-draulic tank, oil and oil cooler. This article also explains how an elevator.

The concept of an elevator is incredibly simple - it's just a compartment attached to a lifting system. Tie a piece of rope to a box, and you've got a basic elevator.Of course, modern passenger and freight elevators are a lot more elaborate than this. They need advanced mechanical systems to handle the substantial weight of the elevator car and its cargo. Additionally, they need control mechanisms so passengers can operate the elevator, and they need safety devices to keep everything running smoothly. A tank (the fluid reservoir). A pump, powered by an.

A valve between the cylinder and the reservoirThe pump forces fluid from the tank into a pipe leading to the cylinder. When the valve is opened, the pressurized fluid will take the path of least resistance and return to the fluid reservoir. But when the valve is closed, the pressurized fluid has nowhere to go except into the cylinder. As the fluid collects in the cylinder, it pushes the piston up, lifting the elevator car.When the car approaches the correct floor, the control system sends a signal to the electric motor to gradually shut off the pump. With the pump off, there is no more fluid flowing into the cylinder, but the fluid that is already in the cylinder cannot escape (it can't flow backward through the pump, and the valve is still closed). The piston rests on the fluid, and the car stays where it is.To lower the car, the elevator control system sends a signal to the valve.

Elevator Hydraulic Cylinder Manufacturers

The valve is operated electrically by a basic solenoid switch (check out for information on solenoids). When the solenoid opens the valve, the fluid that has collected in the cylinder can flow out into the fluid reservoir. The weight of the car and the cargo pushes down on the piston, which drives the fluid into the reservoir. The car gradually descends. To stop the car at a lower floor, the control system closes the valve again.This system is incredibly simple and highly effective, but it does have some drawbacks.

In the next section, we'll look at the main disadvantages of using hydraulics.

UPGRADES & PERFORMANCE OPTIMIZATIONModernizing your hydraulic elevators is often necessary to bring the systems up to new codes and regulations. These specific upgrades can make a big difference in the operational efficiency, ride quality, safety, and reliability of the equipment, and can ultimately increase the value of your building. WHAT IS A HYDRAULIC ELEVATOR?A hydraulic elevator is one that is powered by a fluid-driven piston that travels inside of a cylinder. These elevators don’t use overhead hoisting machinery like traction units.Hydraulic elevators operate at slower speeds than other elevator types and are traditionally found in buildings that serve up to 79’ of travel, or up to seven stories.

Hydraulic Elevator Systems

HYDRAULIC ELEVATOR MODERNIZATIONStanley Elevator can modernize any make or model of hydraulic elevator equipment with the latest technology. We begin with a thorough inspection process and field survey to assess the condition of your current equipment. From there, our technicians use their expertise to make recommendations as to whether it’s necessary to retain, recondition, or replace certain parts of the system. Power UnitA power unit is used on all hydraulic elevator equipment types. A standard power unit consists of a tank, pump, motor, control valve, and silencer. The power unit pumps oil to push the piston up.

It also allows the oil to return to the tank as the car travels down. Jack assemblyA conventional jack assembly is one installed in the ground. Major components of a conventional jack assembly include:.

Cylinder. Plunger. Jack head. Packing and flange. Casings. Protection (if any)When considering modernization, we will assess the age, condition, and operation of the jack assembly components to determine if a or upgrade if necessary.Note: Recent code changes in several states have required or recommended the replacement of jack assemblies installed prior to 1972.

Pump For Hydraulic Cylinder Elevator Parts

Control ValveThe control valve is the device on hydraulic elevators that controls the oil flow to and from the jack. Hydraulic elevators only perform as well as the control valve.

If the flow of oil from the power unit to the jack is erratic, the performance of your elevator will be too. This can cause your elevator to ride rough, bouncy, noisy, and/or level improperly.There are many makes and models of valves, all of which have fine adjustment pins, filtering screens, and “O” rings prone to wear and tear. Many older style valve components are currently hard to get or obsolete. A poorly maintained or adjusted valve is one of the most common causes of erratic operation on hydraulic elevators.We will assess the condition of your valves and determine if a rebuild, upgrade, or replacement is necessary. We commonly recommend thyssenkrupp’s patented I-Series® valve.

As the industry’s number one selling valve, the pistons in the I-2® and I-3® valves are machined to reduce friction, making the operation of the elevator smoother, quieter, and more consistent. If you’re in need of thyssenkrupp elevator repair, Overspeed/pipe rupture valveMany older elevators are not equipped with an overspeed valve (OSV), also referred to as a pipe rupture valve. This valve can be designed and adjusted in the field to stop the elevator in the event of an overspeed condition caused by a broken supply line or an abnormally high rate of oil flow between the OSV and the power unit. The OSV will not stop the car from overspeeding due to underground cylinder leaks, and is not a substitute for cylinder replacement or other safety devices. We do recommend one be installed if it doesn’t already exist.

SilencerA muffler-type device installed in the oil line of a hydraulic elevator pump is designed to reduce noise produced as oil moves through the line. These units can develop leaks and lose their effectiveness. We can assess your silencer for proper performance and determine if are necessary for your hydraulic elevator modernization. Car sling/platformThe sling is the basic frame which consists of two stiles, a crosshead, and a bolster or safety plank that supports the platform and cab of an elevator. The platform or floor of the elevator is placed in the sling and supported by brace rods in each corner.The crosshead is the upper member of the car frame. The stiles are the vertical members of the car sling, with one on each side that fastens the crosshead to the safety plank.

The brace rod is a rod extending from the elevator platform. This is framed to another part of the elevator car frame or sling for the purpose of supporting the platform or holding it securely in position.

Brace rods are supports for the outer corners of the platform, each of which tie to upper portions of the stile.The platform isolation is made of rubber or another vibration-absorbing material to reduce the transmission of vibration and noise. These pads are often replaced when modernizing, as new isolation is more resilient and helps to reduce vibration and improve the ride comfort for passengers.The bolster is the bottom horizontal member of a hydraulic car sling to which the platen plate attaches. The safety plank is the bottom member of a sling for a traction elevator which contains the safety. Guide shoesGuide shoes are devices mounted on the top and bottom of the elevator sling and slide or roll on the rails to guide the elevator through the hoistway. They are equipped with rollers, liners, and tension springs that are subject to wear and tear.

Some older style guide shoes require a poured lead Babbitt shoe, rather than a replacement nylon or neoprene liner.If guides are not maintained or adjusted properly, your elevator will tend to rock, sway, squeak, or even rumble its way through the hoistway. We will assess your guides’ type and condition and recommend repairs or replacements as required.BuffersA buffer is a device designed to stop a descending car or counterweight beyond its normal limit and to soften the force with which the elevator runs into the pit during an emergency.A spring buffer is most commonly found on hydraulic elevators or used for elevators with speeds less than 200 feet per minute. These devices are used to cushion the elevator and are almost always located in the elevator pit.An oil buffer is another type of buffer, and is more commonly found on traction elevators with speeds higher than 200 feet per minute. This type of buffer uses a combination of oil and springs to cushion a descending car or counterweight and are most commonly located in the elevator pit. Because of their location in the pit, buffers have a tendency to be exposed to water and flooding. They require routine cleaning and painting to ensure they maintain their proper performance specifications.

Oil buffers also need their oil checked and changed if exposed to flooding.When planning a hydraulic elevator modernization, our technicians will assess the type and condition of your equipment and recommend if any repairs or elevator replacement parts are required.