The plunger pump is divided into two representative structures: an axial piston pump and a radial piston pump. Since the radial piston pump belongs to a new type of high-efficiency pump with high technical content, it is accelerating with localization. The radial piston pump will inevitably become an important part of the application of the plunger pump; for details, see the radial piston pump encyclopedia; the following only explains the axial piston pump as an example.
An axial piston pump operates with a volume change produced by the reciprocating motion of a plunger parallel to the drive shaft within the plunger bore. Since the plunger and the plunger hole are both round parts, high precision fit can be achieved during processing, so the volumetric efficiency is high, the operation is smooth, the flow uniformity is good, the noise is low, the working pressure is high, etc., but the hydraulic oil is The pollution is more sensitive, the structure is more complicated, and the cost is higher.
MCY14-1B: Quantitative Piston Pump
SCY14-1B: Manual variable piston pump
YCY14-1B: Pressure variable plunger pump
BCY14-1B: Electro-hydraulic control plunger pump
PCY14-1B: Constant pressure variable displacement piston pump
The pumping mechanism of the plunger pump comprises two sets of precision parts: the plunger + the plunger sleeve constitutes the plunger coupler, the oil outlet valve and the oil outlet valve seat constitute the oil valve coupler.
The plunger and the plunger sleeve are a pair of precision coupling parts. They are not interchangeable after paired grinding. High precision and smoothness and good wear resistance are required. The radial clearance is 0.002~0.003mm.
The cylindrical surface of the plunger head is cut with a chute, and communicates with the top through a radial hole and an axial hole, the purpose of which is to change the circulating oil supply amount; the plunger sleeve is provided with an inlet and an oil return hole, and is connected with the pump The low-pressure oil chambers in the body are connected, and the plunger is placed in the upper body of the pump, and the positioning screws are used for positioning.
The position of the chute head chute is different, and the method of changing the oil supply amount is also different.
The oil outlet valve and the oil outlet valve seat are also a pair of precision couple parts, which can not be interchanged after pairing and grinding, and the matching clearance is 0.01mm.
The oil discharge valve is a one-way valve. Under the action of spring pressure, the upper conical surface of the valve is closely matched with the valve seat. The function is to isolate the high pressure oil pipe from the upper end of the plunger when the supply is stopped, and prevent the oil in the high pressure oil pipe. Flow backward into the fuel injection pump.
The lower part of the oil delivery valve has a cross section that can be guided and passed through diesel. There is a small cylindrical surface under the cone surface of the oil discharge valve, which is called the pressure relief belt. Its function is to quickly reduce the oil pressure in the high pressure oil pipe when the oil supply is finished, and avoid the oil drop phenomenon at the injection hole. When the ring is dropped into the valve seat, the upper volume is quickly increased, the pressure is rapidly reduced, and the spray is quickly stopped.
The present invention provides a multifunctional pull faucet, comprising: a faucet body, a drawing part is provided at the water outlet port thereof, and the drawing part is connected to a main channel, wherein at least three are provided in the faucet body A branch channel, and the three branch channels are all connected to the main channel. A multifunctional pull faucet provided by the present invention, wherein the hot water channel, the cold water channel and the water purification channel (pure water channel) are all connected to the main channel , And the main channel is connected with the drawing part on the main body of the faucet, so that the drawing part can obtain the water quality (hot water, cold water, purified water or pure water) required by different users, thereby improving the user experience, and , By integrating the hot water channel, cold water channel and pure water channel (pure water channel) into the main channel, the internal structure of the faucet is simplified, and the production cost of the faucet is reduced.
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