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Method for controlling plunger pump by frequency and plunger pump

A plunger pump and pump head technology, applied in the field of plunger pumps, can solve the problems of reduced volume, difficult manufacturing, complex structure, etc., and achieve the effects of small volume, convenient control, and light weight

Active Publication Date: 2016-01-13
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of this patent is complex, especially the gear transmission part of the stepping motor is difficult to manufacture, and it is impossible to further reduce the volume and realize miniaturization

Method used

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  • Method for controlling plunger pump by frequency and plunger pump
  • Method for controlling plunger pump by frequency and plunger pump

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Experimental program
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Effect test

Embodiment

[0020] A method of controlling the plunger pump by frequency, such as figure 1 shown. The plunger pump uses a linear stepping motor as the pump power; the linear stepping motor is controlled by a pulse signal, the direction of the drive shaft is changed by the direction of the pulse signal, and the speed of the drive shaft is changed by the frequency of the pulse signal to realize the plunger pump. flow control. The transmission shaft of the linear stepper motor is divided into two sections: the spline shaft 5 and the threaded shaft 10, and the bidirectional rotation of the rotor 12 is converted into the linear reciprocating motion of the threaded shaft 10 through the threaded shaft 10 and the internal thread in the inner hole of the rotor; The spline groove on the front end cover 6 of the linear stepping motor restricts the radial rotation of the spline shaft 5 , and drives the plunger 15 to reciprocate through the spline shaft 5 to realize the oil suction and discharge f...

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PUM

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Abstract

The invention discloses a method for controlling a plunger pump through frequency and the plunger pump. The plunger pump uses a linear stepping motor as the pump power; the linear stepping motor is controlled by a pulse signal, the direction of the drive shaft is changed by the direction of the pulse signal, and the speed of the drive shaft is changed by the frequency of the pulse signal to realize the plunger pump. flow control. The present invention has the following technical features: firstly, the flow control of the pump is realized through the frequency control mode, which is convenient and flexible; secondly, the linear stepping motor and the pump body are integrated into one body, which embodies the integration of hydraulic components, Miniaturization; on the other hand, it reflects the high integration of hydraulic technology and digital control technology; third, it is small in size and light in weight. The displacement of the invention is slightly upgraded, and it is mainly used in hydraulic control systems where low pressure and micro-flow control are required, and can also be used in medical machines such as medical injection machines that require strict control of small medicines.

Description

technical field [0001] The invention relates to a method for controlling a plunger pump through frequency and the plunger pump, belonging to the technical field of plunger pumps. Background technique [0002] Traditional variable plunger pumps usually change the flow rate by changing the inclination angle of the swash plate or cylinder, and are mainly used in high-pressure and high-flow hydraulic pumps. The structure of the pump is generally more complicated, and it is more troublesome to control. Therefore, corresponding to some small displacement pumps, if the above method of changing the inclination angle of the swash plate or the cylinder body is still used to realize the flow change, not only is it more troublesome to manufacture, but also the manufacturing cost is high, and the volume cannot be further reduced. Therefore, the above-mentioned plunger pump is not suitable for small flow working conditions. [0003] For this reason, the applicant applied for the patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06F04B17/04
Inventor 吴怀超路芳
Owner GUIZHOU UNIV