Hydraulic station is a hydraulic source device, composed of hydraulic pump, driving motor, fuel tank, direction valve, throttle valve, overflow valve, or a hydraulic device, including a control valve. According to the flow direction, pressure and flow rate required by the drive device, suitable for the various machinery separated from the drive device and the hydraulic station, the hydraulic station and the drive device (cylinder or motor) with oil pipe connection, the hydraulic system can achieve various specified actions.
Hydraulic station hydraulic station is generally a mechanical device that provides lubrication and power for the mechanical operation of large and medium-sized industrial production.
The use of hydraulic system is due to the hydraulic system, high efficiency and simple structure in power transfer. The main task of the hydraulic system is to transform the power from one form to another.
Operational Principle
Hydraulic station, also known as hydraulic pump station, motor drive oil pump rotation, pump from the oil from the tank, the mechanical energy into hydraulic oil pressure energy, hydraulic oil through the integrated block (or valve combination) by hydraulic valve direction, pressure, flow adjustment after the external transmission to the hydraulic machinery cylinder or motor, to control the direction of the hydraulic motor transformation, strength and speed, promote various hydraulic mechanical work.
Hydraulic station is an independent hydraulic device, it supplies oil according to the drive device (host) requirements, and control the direction, pressure and flow of oil flow, it is suitable for the host and hydraulic device can separate various hydraulic machinery, by the motor drives the oil pump rotation, pump from the oil from the tank after the oil pump, the mechanical energy into hydraulic oil pressure energy.
After the user's purchase, as long as the hydraulic station is connected with the actuator (oil cylinder and oil motor) on the main engine with the oil pipe, the hydraulic machinery can realize various prescribed movements and working cycles.
Basic Classification
The structural form of the hydraulic station is mainly distinguished by the structural form, installation position and cooling mode of the pump device.
Structural Installation
According to the mechanism form and installation position of the pump device can be divided into:
1) Upper vertical: pump device is installed on the tank cap, mainly used for quantitative pump system.
2) Horizontal pump type: the pump device is installed horizontally on the fuel tank cap, mainly used for the variable pump system, so order to facilitate flow regulation.
3) Side type: the pump device is installed horizontally on the separate basis beside the fuel tank. The side type can be equipped with standby pump, mainly used for the system with large fuel tank capacity of 250 liters and motor power of more than 7.5 kw.
Cooling-down Method
1) Natural cooling: by the fuel tank itself and the air heat exchange cooling, generally used for the fuel tank capacity is less than 250 liters of the system.
2) Forced cooling: the cooler is adopted for forced cooling, which is generally used in the system with a fuel tank capacity greater than 250 liters. The hydraulic station takes the effective oil storage measure and motor power as the main technical parameters. Fuel tank capacity has 18 specifications (unit: liter / L): 25,40,63,100,100,160,250,400,630,800,1000,1000,1250,1600,2000,2500,3200,4000,4000,5000,6000 This series of hydraulic stations can do: ① by system and without integrated block, ②; ③ can provide electrical control or without electrical control device [1].
Fuel tank form
1) Ordinary steel plate: the box is welded with 5MM-6MM steel plate, and the panel is of 10-12MM steel plate. If the opening is too much, it can be appropriately thickened or reinforced.
2) Stainless steel plate: the box of 304 stainless steel plate, thickness 2-3MM, panel 304 stainless steel plate thickness 3-5MM, the bearing part increased reinforcement.
3) It is difficult to achieve the internal antirust treatment of the ordinary steel plate oil tank, and the rust entering the oil circulation system will cause many faults. The oil tank with all-stainless steel design solves this problem in the industry.
Structural Style
1. Pistons
Single piston rod hydraulic cylinder only has a piston rod at one end. As shown in Figure 3, it is a single-piston hydraulic cylinder. The two ends of the inlet and export oil ports A and B can pass through the pressure oil or return oil, in order to achieve two-way movement, so it is called a dual-action cylinder.
2. Pistle type
① plunger hydraulic cylinder is a kind of single-action hydraulic cylinder, by the hydraulic pressure can only achieve one direction of movement, the plunger return journey to rely on other external force or the weight of the plunger;
The ② plunger only depends on the cylinder liner support and does not contact with the cylinder liner, so that the cylinder liner is easy to process, so it is suitable for doing a long-stroke hydraulic cylinder;
The ③ is under pressed, so it must have sufficient stiffness;
The ④ plunger weight is often larger, when the horizontal placement is easy to droop due to the dead weight, causing the seal and guide unilateral wear, so its vertical use is more favorable.
3. Expansion type
Retractable hydraulic cylinder has two or multiple stage piston, the telescopic hydraulic cylinder piston extends out from large to small in order, and the order of empty load retraction is generally from small to large. The telescopic cylinder can achieve a longer trip, while the retracted length is shorter, and the structure is more compact. Such hydraulic cylinders are commonly used in construction machinery and agricultural machinery.
4. Swing type
Swing hydraulic cylinder is an actuator that output torque and reciprocating motion, also known as swing hydraulic motor. There are two single-leaf and double-leaf forms. The stator block is fixed to the cylinder block, while the blade and the rotor are joined together. Depending to the oil direction, the blade will swing the rotor.
Two Stage Braking
The TY1S (B792S), B157, TE130 are used for the 2JK, 2JK / A, 2JK / E type single rope double cylinder series hoists.
TY1D (B792D), B159, TE131 are used for the JK, JK / A, JK / E single-rope single-cylinder series hoists and the JKM-C, JKMD-C, JKM-A, JKMD-A, JKM-E, JKMD-E well-tower and ground-based multi-rope hoists.
Hydraulic Pressure Station
Hydraulic delay secondary brake hydraulic station:
TY3S (TK083S), TE002 are used for single rope twin cylinder series lifts (lift model is the same as above).
TY3D (BTK083D), TE003 is used for single rope single cylinder series elevator and multi-rope series (tower and floor type) elevator (lift model as above).
Constituent Elements
FU
Hydraulic station is composed of pump device, integrated block or valve combination, fuel tank and electrical box. The function of each component is as follows:
The pump device —— is equipped with a motor and an oil pump, which is the power source of the hydraulic station, and converts the mechanical energy into the power energy of the hydraulic oil.
The integrated block —— is composed of a hydraulic valve and a channel body. It implements the direction, pressure and flow regulation of the hydraulic oil.
Valve combination —— is a plate valve mounted on the vertical plate, plate rear pipe connection, and the same function as the integrated block.
Oil tank —— is a semi-closed container for steel plate welding, and it is also equipped with oil filter net, air filter, etc., and it is used to store oil, oil cooling and filtration.
Box —— has two forms: one terminal board with external leads; one is equipped with a full set of control appliances.
component
⑴ electric motor, gear pump —— to provide the driving force for the hydraulic system.
The ⑵ electromagnetic reversing valve —— controls the direction of the hydraulic oil flow and changes the movement direction of the cylinder.
⑶ electromagnetic overflow valve —— prevents the entire hydraulic system overpressure, equivalent to the safety valve, protect the oil pump and oil circuit system safety and keep the pressure of the hydraulic system constant.
The ⑷ pressure relief valve —— can adjust the pressure relief valve to meet the requirements of different working mechanisms that need different working pressure requirements, so that the secondary oil circuit pressure is lower than the primary oil circuit pressure.
The ⑸ governor —— adjusts the oil circuit to change the operating speed of the driver hydraulic cylinder.
The ⑹ hydraulic oil filter —— has two oil filters in the hydraulic station. One is installed at the suction port of the gear pump to avoid inhaling impurities such as particles from the hydraulic oil in the tank. The other is installed in the hydraulic oil conveying pipeline of the system to remove the impurities in the hydraulic oil, and also to remove the gum, bituminous tic, carbonized particles caused by the chemical changes of the hydraulic oil itself. So as to prevent the valve stem stuck, damper hole blockage and other failures. The pipeline system is equipped with differential pressure alarm device. When the filter element is blocked, the electric signal is issued, and the filter element should be cleaned or replaced.
The ⑺ pressure gauge —— is used to display the working pressure of the hydraulic station to help the operator control the oil pressure.
⑻ air filter —— is installed on the tank, has three functions, one is to prevent the air pollutants from entering the tank; the other is to avoid the oil pump suction phenomenon; the third is to do the hydraulic oil supplement mouth.
The ⑼ level gauge —— is mounted on the side of the tank showing the level of the hydraulic oil.
⑽ thermometer —— Some tanks are equipped with a thermometer showing the temperature of the hydraulic oil.
⑾ connection line —— transport hydraulic driving force, That include hydraulic fittings , hydraulic hose , hydraulic adapters or hydraulic adaptors , most of the steel pipe, also useful pressure hose.
Main Parameter
Maximum working oil pressure =6.3MPa Maximum flow rate: " = 9 L/min
Primary oil pressure value during secondary braking: level 1 is 0-4 M P a adjustable
Operating oil temperature: 15~60°C
Oil tank storage capacity: 500L
Secondary brake delay time: 110s
The maximum input current of the hydraulic regulator: 250mA
Hydraulic oil plate number: No.22 turbine oil.
The use of hydraulic station on the gas generator has been very common, used for the coal adding mechanism and ash basin transmission, in the use should pay attention to reasonable maintenance and maintenance:
1. If pipeline oil leakage and other abnormal phenomena are found during work, stop down immediately for maintenance.
2. In order to extend the service life of the hydraulic oil, the oil temperature should be less than 65℃; check the quality of the hydraulic oil every three months, and replace the hydraulic oil quality once for half a year.
3. Observe the oil level of the tank in time, and supplement the hydraulic oil that meets the requirements in time to avoid the oil pump.
4. Clean or replace the oil filter regularly.
5. Keep the working environment of the hydraulic station clean and tidy.
