Open-type low-speed high-flow radial plunger pump

Abstract

The invention discloses an open-type low-speed high-flow radial plunger pump, which comprises a bracket and a crankshaft, wherein an eccentric section around the crankshaft is provided with a plurality of double-acting cylinders which are uniformly distributed; the bottom of each double-acting cylinder is hinged with the bracket; a piston rod of each double-acting cylinder is connected with the eccentric section of the crankshaft through a rotatable connecting structure; a rod cavity oil port and a rodless cavity oil port of each double-acting cylinder are connected through two groups of parallel one-way valves; each group of one-way valves comprises two one-way valves; the two one-way valves in one group are arranged opposite to each other, and the two one-way valves in the other group are arranged back to each other; the middle position of two one-way valves which are arranged back to each other is connected with an oil outlet pipe; and a middle position of two one-way valves which are arranged opposite to each other is connected with an oil inlet pipe. The open-type low-speed high-flow radial plunger pump has the advantages of simple structure and transmission relationship, low cost and fault rate and high power acquisition rate and operating efficiency.

Description

technical field [0001] The invention relates to a plunger pump, in particular to a low-speed and high-flow radial plunger pump used in a large-scale wind-electric power-hydraulic conversion system. Background technique [0002] Traditional hydraulic pumps mostly use impeller, gear and plunger structures. If they are used in wind power hydraulic transmission systems, the blades of the wind power generator will drive the impeller or gear to rotate or the piston to reciprocate. However, the characteristics of large wind power The speed of the propeller is very slow, usually 10 - 48 rpm. Obviously, the traditional hydraulic pump cannot output high-pressure and large-flow hydraulic oil under this working condition, and it is difficult to achieve the high-efficiency power generation of the hydraulic motor driving the generator behind. Later, in order to meet the needs of wind power generation, some foreign companies specially developed a large external curve plunger pump, whic...

AI Technical Summary

Problems solved by technology

[0002] Traditional hydraulic pumps mostly use impeller, gear and plunger structures. If they are used in wind power hydraulic transmission systems, the blades of the wind power generator will drive the impeller or gear to rotate or the piston to reciprocate. However, the characteristics of large wind power The speed of the propeller is very slow, usually 10 - 48 rpm. Obviously, the traditional hydraulic pump cannot output high-pressure and large-flow hydraulic oil under this working condition, and it is difficult to achieve the high-efficiency power generation of the hydraulic motor driving the generator behind. Later, in order to meet the needs of wind power generation, some foreign companies specially developed a large external curve plunger pump, which includes dozens of oil cylinders arranged in a ring, rail rollers at the bottom of each cylinder piston, and rails. The wave parts contacted by the rollers, the wave parts are located inside all rail rollers and are driven to rotate by the paddles, and the bottom and top of each oil cylinder are respectively equipped with low pressure valves and high pressure valves; when the wave parts rotate, the rail rollers drive the pistons to make Moving up and down, when the piston moves down, the low-pressure valve is opened to absorb oil; when the piston moves up, the oil in the cylinder is compressed and pressurized until the high-pressure valve is opened, and the oil pressure generated by each piston is gathered through the piping. The power provided by the impeller of the wind turbine is converted into a high-pressure oil source through the outer curve plunger pump, which drives the hydraulic motor to drive the generator to generate electricity; the disadvantages of the plunger pump are: 1) complex structure, many parts, and high cost; 2) The transmission relationship is relatively complicated, the failure rate is high, and the maintenance workload is large; 3) The piston only acts in one direction, and the power collection rate and operating efficiency are low

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