Hydraulic elevator
1. Due to the advantages of stable, comfortable, low noise and high utilization ratio of hydraulic elevators, it is widely used in public places such as factory buildings, shopping malls, office buildings, parking lots, stations and airports, and is perpendicular to common drive forms (such as traction elevators). Compared with transportation vehicles, it has the following characteristics:
(1) Building structure:
Machine room settings are flexible. The machine room can be located around the elevator shaft, with an area of about 2M * 2M, which is enough to accommodate equipment and installation, maintenance space, and can be fully coordinated with the architectural design to layout. Reduce investment costs: The distance from the top floor is more than 3.6 meters, and there is no need to set up a top-floor computer room, which is in line with the overall beauty of the building.
High hoistway utilization rate: Generally, the hydraulic elevator is not provided with a counterweight device, so the hoistway area utilization rate can be improved. Well structure strength is low. Due to the load of the hydraulic elevator car and its load, all the hydraulic cylinders act on the foundation of the bottom pit of the hoistway. The requirements for the building performance of the hoistway floor and top are low, and the earthquake resistance is high.
(2) Technical performance:
Smooth running and comfortable ride. The hydraulic system transmits power uniformly and smoothly, and the proportional valve can achieve stepless speed regulation, and the elevator's running speed curve changes gently, so the comfort is better than the traction speed regulator.
Good safety, high reliability and easy maintenance. In addition to the safety equipment of ordinary traction elevators, hydraulic elevators are also equipped with:
A, relief valve. Prevents excessive pressure during ascent.
B. Emergency manual valve. When the power supply fails, the car can be lowered to the nearest floor position in an emergency. The landing door car door is automatically opened to allow passengers to exit the car safely.
C. Manual pump. When the system fails, the manual pump can be operated to produce high-pressure oil to raise the car to the nearest floor position.
D. Pipeline rupture valve, when the hydraulic system pipeline ruptures and the car stalls and drops, it can automatically cut off the oil circuit.
E. Fuel tank oil temperature protection. When the oil temperature in the fuel tank exceeds a certain value, the oil temperature protection device sends a signal to suspend the use of the elevator. When the oil temperature drops, the elevator can be started.
F, large load capacity. The hydraulic system has a large power-to-weight ratio, so the elevators of the same specifications have a relatively large load capacity and a relatively large car area.
G, low noise. The hydraulic system can use low-noise screw pumps. At the same time, the oil pump and motor can be designed to work submerged, forming a pumping station as a whole, which greatly reduces noise.
H. Good explosion-proof performance. The hydraulic elevator uses low-condensing flame-retardant hydraulic oil, and the oil tank is sealed as a whole. The motor and oil pump are immersed in the hydraulic oil, which can effectively prevent the combustion of flammable gas and liquid.
2. Use maintenance:
1. Low failure rate. Due to the use of advanced hydraulic systems and good electro-hydraulic control methods, elevator failures can be minimized.
2. Good energy saving. When the hydraulic elevator descends, it is driven by the pressure generated by its own weight, which can save energy.
3. Relative to traction elevators, there is no loss of steel wire ropes, saving maintenance costs.
4, simple troubleshooting, simple operation by the management staff, you can rescue the relevant personnel.
