Cylinder head bypass backflow type piston compressor gas amount stepless adjustment method

A stepless regulation, compressor technology, applied in multi-stage pumps, mechanical equipment, machines/engines, etc., can solve the problems of extremely high fatigue life requirements of actuators, high investment and maintenance costs, and high actuator costs. Simple structure, low cost, and significant reduction in energy consumption

Active Publication Date: 2019-04-19
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of top-opening the intake valve to control the gas return can realize the gas volume adjustment of 0-100% of the full range, and the adjustment effect is optimal. However, to realize the opening and closing of the control gas valve in each cycle of the compressor, the fast speed of the actuator in milliseconds is required. Response and action at a frequency equivalen

Method used

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  • Cylinder head bypass backflow type piston compressor gas amount stepless adjustment method
  • Cylinder head bypass backflow type piston compressor gas amount stepless adjustment method
  • Cylinder head bypass backflow type piston compressor gas amount stepless adjustment method

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Example Embodiment

[0040] Implementation case:

[0041] Take a 2D two-row two-cylinder reciprocating compressor with a working speed of 500r / min, a rated suction pressure of 0.1MPa, and a rated discharge pressure of 0.3MPa as an example.

[0042] Compressor working speed is n=500r / min

[0043] Number of cylinders N=2

[0044] The absolute phase angle of each cylinder piston when it reaches the outer dead center is θ i =0°(i=1~2)

[0045] Crankshaft radius r=90mm

[0046] Length of connecting rod l=450mm

[0047] Crank connecting rod ratio λ=0.2

[0048] Cylinder clearance volume V cle =1.26e06mm 3

[0049] The bore of both cylinders is D cy =250mm

[0050] Expansion coefficient n e = 1.4

[0051] Calculate the compressor working cycle time

[0052] The time T from when the controller outputs the on-off valve opening signal to when the valve is fully opened 1 =7ms

[0053] The time T from when the controller outputs the on-off valve closing signal to when the valve is completely closed 2 =6ms

[0054] Under the s...

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Abstract

The invention relates to a reciprocating compressor gas amount adjustment method, and provides a method for achieving gas amount stepless adjustment by additionally installing a bypass pipeline on a cylinder head of a cover side cylinder based on the gas backflow fundamental principle. By controlling opening and closing of a cylinder head bypass pipeline, the effect that the specific amount of gasin an air cylinder flows back into a gas feeding pipeline in the uncompressed low-pressure state, only the required amount of gas needs to be compressed, and gas amount energy-saving adjustment is achieved. The method is good in energy saving effect, a required adjusting device is simple in structure, the investment cost for additionally installing the stepless gas amount adjustment device on a reciprocating compressor is effectively reduced, in addition, a control system is simplified, and a technological means is provided for energy saving improvement of piston compressor gas amount stepless adjustment.

Description

technical field [0001] The invention relates to a method for adjusting the stepless gas volume of a piston compressor, which realizes the stepless adjustment of the gas volume of the compressor by allowing the gas in the cylinder to flow back into the intake pipe in an uncompressed low-pressure state, so that the displacement of the compressor can adapt to the Gas consumption requirements for back-end processes. At the same time, the uncompressed backflow of excess gas saves the energy wasted in compressing excess gas, and realizes energy-saving and efficient operation of the compressor. Background technique [0002] The piston compressor used in the process industry is a positive displacement compressor, and its displacement is determined by the size of the compressor cylinder under a certain intake pressure. In the industrial field, the size of the compressor cylinder is generally selected and designed according to the maximum volume flow required by the device, and there...

Claims

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Application Information

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IPC IPC(8): F04B25/00F02M35/04F04B49/24F04B49/22F04B49/06
CPCF02M35/04F04B25/005F04B49/007F04B49/06F04B49/22F04B49/24
Inventor 王瑶张进杰江志农周超刘雯华
Owner BEIJING UNIV OF CHEM TECH
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