According to its structural characteristics can be divided into different types of piston pump, there are single piston pump, horizontal piston pump, axial piston pump, etc. Then for the simple introduction of these Piston pump, as follows: Piston pump mechanical type 1, the structure of a single plunger pump consists mainly of eccentric, plunger, spring, cylinder, two one-way valve. A closed volume is formed between the plunger and the cylinder bore. Eccentric rotation of a revolution, the plunger up and down a reciprocating motion, downward movement of oil absorption, upward movement of oil. The volume of oil discharged per revolution of the pump is referred to as displacement. The displacement is only related to the structural parameters of the pump. 2, horizontal piston pump horizontal piston pump is composed of several plungers (usually 3 or 6) mounted side by side, with a crankshaft through the connecting rod slider or eccentric shaft directly push the plunger reciprocating motion , To achieve suction, drain liquid pump. They also use valve-type flow devices, and most are quantitative pumps. The emulsion pump in the coal mine hydraulic support system is usually a horizontal piston pump. Emulsion pump for coal mining face, hydraulic support for the emulsion, the working principle of crankshaft rotation driven reciprocating piston to achieve aspiration and drainage. 3, axial piston pump axial piston pump (English name: Pistonpump) is the piston or plunger reciprocating direction parallel to the central axis of the cylinder piston pump. Axial piston pumps utilize a change in volume generated by the reciprocation of a plunger parallel to the drive shaft within the plunger bore. As the plunger and plunger holes are round parts, machining can achieve high precision with high volumetric efficiency 4, Straight shaft swash plate piston pump Swash plate piston pump is divided into pressure oil supply Type and self-absorption of oil two. Pressure oil supply type hydraulic pumps are mostly used by the pressure of the fuel tank, by hydraulic pressure oil tank, after each start the machine, such as the need to wait until the hydraulic pressure box to use the pressure, to operate machinery. If the hydraulic pressure tank when the lack of pressure on the start of the machine, the hydraulic pump and slipper boots cause pull off phenomenon, the pump will cause the return plate and platen non-normal wear and tear. 5, radial piston pump radial piston pump can be divided into valve with the flow and shaft with two major categories. Valve distribution radial piston pump has the disadvantage of high failure rate and low efficiency. The international development of the 70,80 generation shaft radial flow radial piston pump to overcome the valve with radial piston pump deficiencies. Due to the structural features of the radial pump, the axial-flow radial piston pump is more resistant to impact than the axial piston pump, has a long service life and high control precision. Variable stroke Short pump variable is variable piston and limit plunger under the action of changing the eccentricity of the stator to achieve, and set the maximum eccentricity of 5-9mm (depending on displacement size), the variable stroke is very short . The variable mechanism is designed for high-pressure operation and is controlled by a control valve. Therefore, the pump response speed. The radial structure design overcomes the problem of partial wear of the axial piston pump slipper. Its anti-impact ability is greatly improved. 6, hydraulic piston pump Hydraulic piston pump by hydraulic pressure hydraulic tank, each time you start the machine, the hydraulic tank must be used to reach the use of pressure, to operate machinery. Straight shaft swash plate piston pump is divided into two types of self-suction oil pressure type. Most of the pressure supply type hydraulic pump with air pressure tank, there are hydraulic pump itself with a charge pump to the hydraulic pump inlet to provide pressure oil. Self-priming oil pump self-priming oil capacity, no external oil supply. Extended reading: Top ten brands of motorcycles Canton Fair Central China Construction Water Exhibition Pump manufacturers ranked ptc exhibition industry Internet (Xiamen) Technology Co., Ltd. Asia Pump Network Editor: He Duanhui (QQ / WeChat:) http: //beng.liuti. cn / (Service Hotline:)
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