CN-122014593-A - Active vibration reduction method and device for axial plunger pump based on magnetic force reverse excitation

CN122014593ACN 122014593 ACN122014593 ACN 122014593ACN-122014593-A

Abstract

A method for actively damping vibration of axial plunger pump based on magnetic reverse excitation includes collecting vibration information of plunger pump and swash plate in real time, extracting pulsation parameter of vibration information by controller, predicting pulsation parameter of next moment based on real-time pulsation parameter by prediction model, obtaining corresponding exciting force by pulsation parameter, calculating target force needed for counteracting exciting force of next moment, controlling current flowing through coil assembly by controller based on target force to generate first magnetic field, generating second magnetic field by permanent magnet assembly in sliding shoe, generating reactive force counteracting exciting force by interaction of first magnetic field and second magnetic field, and suppressing alternating exciting force caused by pressure pulsation of plunger cavity in real time.

Inventors

YE SHAOGAN
Kong Yiying
XIA XIAOSONG
BAO YUE
BU XIANGJIAN
LIU WANSHAN
LI CHUNMEI

Assignees

厦门大学

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. An active vibration reduction method of an axial plunger pump based on magnetic force reverse excitation is characterized by comprising the following steps of. S1, vibration information is acquired in real time, wherein the vibration information comprises pressure pulsation data of an outlet of a plunger pump and vibration signals transmitted to a swash plate; s2, extracting pulsation parameters of the vibration information by the controller, predicting the pulsation parameters at the next moment based on the pulsation parameters in real time through a prediction model, and calculating target force required for counteracting exciting force at the next moment; And S3, the controller controls the current flowing through the coil assembly based on the target force to generate a first magnetic field, the permanent magnet assembly in the sliding shoe generates a second magnetic field, the coil assembly is arranged in the sloping cam plate, and the reaction force for counteracting the exciting force is generated through the interaction of the first magnetic field and the second magnetic field to restrain the vibration of the sliding shoe.
2. The method for actively damping an axial plunger pump based on reverse excitation of magnetic force according to claim 1, wherein the target force is equal to the exciting force in magnitude and opposite in direction, and in step S3, the controller generates a driving current signal corresponding to the driving current in combination with an active waveform cancellation algorithm, and adjusts the generation direction and magnitude of the first magnetic field in real time.
3. The method of active vibration reduction of an axial plunger pump based on magnetic reverse excitation according to claim 2, wherein the controller is further capable of calculating a propagation delay time τ of a pressure wave transmitted from the acquisition position of the vibration message to the shoe and performing phase correction on an output phase of the driving current signal.
4. The method for actively damping vibration of an axial plunger pump based on magnetic reverse excitation according to claim 3, wherein the driving current is , wherein, For the effective magnetic path length of the coil assembly, For the total number of turns of the toroidal electromagnetic coil in the coil assembly, Is the magnetic permeability of the vacuum and is equal to the magnetic permeability of the vacuum, For the force and magnetic field conversion coefficient, In order to integrate the force transmission coefficient(s), For the equivalent area of action of the plunger pump, For predicting instantaneous pressure pulsation value of said plunger pump outlet 。
5. The method for actively damping vibration of an axial plunger pump based on reverse excitation of magnetic force according to claim 1, further comprising the step S4 of the controller recording the actual vibration message after the compensation of the reaction force in the step S3 at the next moment and adaptively adjusting the parameters of the prediction model.
6. The active vibration damper for the axial plunger pump based on magnetic force reverse excitation can achieve the method according to any one of claims 1-5, and is characterized by comprising a sliding shoe and a sloping cam plate, wherein the sloping cam plate is provided with the coil assembly at a position corresponding to an oil discharge area of the plunger pump, the sliding shoe is provided with the permanent magnet assembly, the active vibration damper further comprises a detection assembly, the detection assembly is used for collecting vibration information and transmitting the vibration information to the controller, and the controller is in signal connection with the coil assembly and is used for receiving the vibration information and generating driving current and controlling the generation direction and the generation size of the first magnetic field in real time to achieve vibration damping.
7. The active vibration damper of the axial plunger pump based on magnetic reverse excitation of claim 6, wherein the controller comprises a phase locking module, an amplitude matching module and a phase delay compensation module which are connected through signals, can extract the pulsation parameters comprising dominant vibration frequency, real-time phase, amplitude and vibration acceleration characteristics based on the vibration information, and further comprises a digital signal processor, wherein the digital signal processor is internally provided with the machine learning model, and can predict future pulsation trend based on the pulsation parameters.
8. The active vibration damper of the axial plunger pump based on magnetic reverse excitation according to claim 6, wherein the head of the sliding shoe is provided with a plurality of first mounting grooves along the axial direction thereof for mounting the permanent magnet assembly, each first mounting groove is spirally distributed in a variable diameter mode, the permanent magnet assembly comprises a plurality of magnet units, and the distribution radius of each magnet unit increases along the direction approaching the plunger pump.
9. The active vibration damper of an axial plunger pump based on magnetic force reverse excitation according to claim 6, wherein the swash plate is provided with a second mounting groove corresponding to the coil assembly in an oil discharge area of the plunger pump, and the second mounting groove is in a fan shape.
10. The active vibration damper of the axial plunger pump based on magnetic reverse excitation according to claim 6, wherein an annular cooling channel is further arranged in the swash plate, and the cooling channel can be connected with a fan.

Description

Active vibration reduction method and device for axial plunger pump based on magnetic force reverse excitation Technical Field The invention relates to the technical field of hydraulic pump vibration reduction, in particular to an active vibration reduction method and device for an axial plunger pump based on magnetic force reverse excitation. Background The axial plunger pump is used as a core power element of a hydraulic system, and vibration induced by periodic pressure pulsation of a plunger cavity, reciprocating inertial impact of a plunger assembly and dynamic load change of a slipper-swash plate pair in the interior of the axial plunger pump is a key technical bottleneck for restricting the development of the axial plunger pump to high pressure, high speed, high reliability and low noise. In particular, the slipper-swashplate friction pair, as a critical interface for transmitting the hydraulic pulsating load, its vibration level directly affects the mechanical efficiency of the pump, the component life and the system noise emissions. The prior vibration reduction technology is mainly focused on structure optimization, passive damping material application or global vibration isolation, and the methods have certain effects on medium-low frequency vibration, but have limited capability of inhibiting high-frequency vibration forced to be generated by the sliding shoes, and are difficult to adapt to variable working condition operation. Therefore, an active vibration reduction scheme which does not interfere with the core lubrication and bearing functions of the bottom of the sliding shoe, can accurately sense and offset high-frequency hydraulic excitation force in real time and has self-adaption and prediction capabilities is urgently needed, so that the running stability of the sliding shoe pair is improved from the source. Disclosure of Invention The invention provides an active vibration reduction method and device for an axial plunger pump based on magnetic force reverse excitation, and aims to realize the suppression of high-frequency vibration of a sliding shoe by introducing magnetic force as active control force. In order to achieve the above purpose, the present invention provides the following technical solutions: An active vibration reduction method of an axial plunger pump based on magnetic force reverse excitation comprises the following steps: S1, vibration information is acquired in real time, wherein the vibration information comprises pressure pulsation data of an outlet of a plunger pump and vibration signals transmitted to a swash plate; s2, extracting pulsation parameters of the vibration information by the controller, predicting the pulsation parameters at the next moment based on the pulsation parameters in real time through a prediction model, and calculating target force required for counteracting exciting force at the next moment; And S3, the controller controls the current flowing through the coil assembly based on the target force to generate a first magnetic field, the permanent magnet assembly in the sliding shoe generates a second magnetic field, the coil assembly is arranged in the sloping cam plate, and the reaction force for counteracting the exciting force is generated through the interaction of the first magnetic field and the second magnetic field to restrain the vibration of the sliding shoe. Further, in the step S3, the controller generates a driving current signal corresponding to the driving current in combination with an active waveform cancellation algorithm, and adjusts the generation direction and the magnitude of the first magnetic field in real time Further, the controller is also capable of calculating a propagation delay time τ of a pressure wave transmitted from the acquisition position of the vibration message to the shoe, and performing phase correction on an output phase of the driving current signal. Further, the driving current is, wherein,For the effective magnetic path length of the coil assembly,For the total number of turns of the toroidal electromagnetic coil in the coil assembly,Is the magnetic permeability of the vacuum and is equal to the magnetic permeability of the vacuum,For the force and magnetic field conversion coefficient,In order to integrate the force transmission coefficient(s),For the equivalent area of action of the plunger pump,For predicting instantaneous pressure pulsation value of said plunger pump outlet。 Further, the method also comprises a step S4, wherein the controller records the actual vibration message after the compensation of the reactive force in the step S3 at the next moment, and adaptively adjusts the parameters of the prediction model. The axial plunger pump active vibration damper based on magnetic force reverse excitation can realize the method, and comprises a sliding shoe, a sloping cam plate, a detection component and a controller, wherein the sloping cam plate is provided with the coil component at a posit