CN112855487A

CN112855487A - Booster pump

Info

Publication number: CN112855487A
Application number: CN201911100372.0A
Authority: CN
Inventors: 孙文豪; 王行飞
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2021-05-28

Abstract

The invention relates to a booster pump, which comprises a casing and a motor assembly arranged in the casing, wherein the motor assembly is provided with a motor output shaft, and the booster pump is characterized in that: the piezoelectric actuator is arranged in the shell, is in contact with the output shaft of the motor and can generate vibration after being electrified so as to offset the vibration generated when the output shaft of the motor works, and can move along the axial direction of the output shaft of the motor. Compared with the prior art, the invention has the advantages that: through be equipped with in the casing with the motor output shaft contact, thereby can produce the piezoelectricity actuator that vibration that the during operation produced with the motor output shaft was offset after the circular telegram, piezoelectricity actuator can follow motor output shaft axial displacement, can effectively reduce the vibration range of booster pump during operation.

Description

Booster pump

Technical Field

The invention relates to a booster pump.

Background

The booster pump is one of the core components of the water purifier, and is used for boosting tap water, adjusting the water pressure in front of the RO membrane and enabling the tap water to pass through the RO membrane to generate purified water. Along with the continuous promotion of the demand to big flux purifier in the market, the requirement to purifier booster pump working parameter and working property is higher and higher. The higher working pressure inevitably causes the booster pump to generate more severe vibration; the vibration from the pump body is also one of the main vibration sources causing the booster pump assembly and the water purifier to generate vibration. Under actual conditions, because the rotor is unbalanced, the installation basis is not good, the existence of reasons such as poor bearing assembly quality will probably cause the motor shaft to produce radial and axial vibration, and the high-speed operation of booster pump motor shaft outwards transmits the vibration through the main connection structure in the casing to lead to the pump body to produce violent vibration. The long-time severe vibration not only can seriously affect the working performance of a booster pump component, but also can seriously damage the whole structure of the water purifier, thereby influencing the service life of the whole water purifier.

Disclosure of Invention

The invention aims to solve the technical problem of providing a booster pump which has light overall vibration during working aiming at the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a booster pump, includes the casing, sets up the motor element in the casing, and motor element has motor output shaft, its characterized in that: the piezoelectric actuator is arranged in the shell, is in contact with the output shaft of the motor and can generate vibration after being electrified so as to offset the vibration generated when the output shaft of the motor works, and can move along the axial direction of the output shaft of the motor.

As an improvement, the piezoelectric actuator is connected with a driving device which can drive the piezoelectric actuator to move along the axial direction of the output shaft of the motor.

The invention further improves the structure, and the structure comprises a self-adaptive controller electrically connected with the piezoelectric actuator, wherein the electric signal intensity of the piezoelectric actuator is controlled by the self-adaptive controller, an acceleration sensor used for detecting a vibration signal of the machine shell is arranged in the machine shell, and the self-adaptive controller controls a feedback signal acquired according to the acceleration sensor, so that the electric signal intensity of the piezoelectric actuator is continuously adjusted.

And the acceleration sensor comprises a first acceleration sensor and a second acceleration sensor, and the first acceleration sensor and the second acceleration sensor are used as two signal input ends of the adaptive controller and are electrically connected with the adaptive controller.

And then, the self-adaptive controller adopts an RLS self-adaptive algorithm or an LMS self-adaptive algorithm or an FxLMS self-adaptive algorithm or a PID self-adaptive control algorithm.

And the number of the piezoelectric actuators is three, and the piezoelectric actuators are uniformly distributed along the circumferential direction of the output shaft of the motor.

The improved motor is characterized in that a bearing is sleeved on the output shaft of the motor, the front end of the piezoelectric actuator is in contact with the bearing, the tail end of the piezoelectric actuator is connected with the inner wall of the shell through a fastening device, the driving device is connected with the fastening device, and the piezoelectric actuator is driven to move along the axial direction of the output shaft of the motor by driving the fastening device to move.

And the fastening device is provided with an axial through hole, and the tail end of the piezoelectric actuator can move in the axial through hole.

And the inner wall of the shell is provided with a slide rail groove which is convenient for the fastening device to slide.

In another improvement, the driving device is not provided with an electric push rod.

And the fastening device is provided with a limiting hole which is communicated with the axial through hole and is perpendicular to the axial through hole, and a manual tightening screw which can fasten and limit the tail end of the piezoelectric actuator is arranged in the limiting hole.

Compared with the prior art, the invention has the advantages that: through be equipped with in the casing with the motor output shaft contact, thereby can produce the piezoelectricity actuator that vibration that the during operation produced with the motor output shaft was offset after the circular telegram, piezoelectricity actuator can follow motor output shaft axial displacement, can effectively reduce the vibration range of booster pump during operation.

Drawings

Fig. 1 is a schematic structural diagram of a booster pump assembly according to a first embodiment of the present invention.

Fig. 2 is a structural diagram of the connection between the fastening device and the piezoelectric actuator according to the first embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a booster pump assembly according to a second embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Example one

As shown in fig. 1, including casing 1, set up motor element 2 in the casing, motor element has motor output shaft 21, is equipped with in the casing 1 with motor output shaft contact, can produce vibration after the circular telegram thereby carry out the piezoelectric actuator 3 that offsets the vibration that the motor output shaft during operation produced to and the adaptive controller 4 of being connected with piezoelectric actuator 3 electricity, piezoelectric actuator 3's signal intensity is controlled by adaptive controller 4, be equipped with the acceleration sensor who is used for detecting casing vibration signal in the casing 1, the feedback signal that adaptive controller 4 control was gathered according to acceleration sensor to constantly adjust piezoelectric actuator 3's signal intensity of telecommunication.

In this embodiment, the acceleration sensor includes a first acceleration sensor 5a and a second acceleration sensor 5b, and the first acceleration sensor 5a and the second acceleration sensor 5b are used as two signal input ends of the adaptive controller 4 and are electrically connected to the adaptive controller. The adaptive controller 4 may adopt an RLS adaptive algorithm, an LMS adaptive algorithm, an FxLMS adaptive algorithm, or a PID adaptive control algorithm to adjust and control the electric signal strength of the piezoelectric actuator 3 according to the feedback signals acquired by the two acceleration sensors.

In addition, in this embodiment, three piezoelectric actuators 3 are provided and are uniformly distributed along the circumferential direction of the motor output shaft 21. The bearing 22 is sleeved on the motor output shaft 21, the front ends of the three piezoelectric actuators 3 are in contact with the bearing 22, the tail ends of the three piezoelectric actuators 3 are connected with the inner wall of the machine shell 1 through the fastening device 6, the inner wall of the machine shell 1 is provided with the slide rail groove 11 which is convenient for the fastening device 6 to slide, and the fastening device 6 can be moved manually, so that the piezoelectric actuators 3 can be driven to move axially along the motor output shaft when the fastening device 6 moves along the slide rail groove 11; the three piezoelectric actuators 3 can move simultaneously or respectively, and after moving, the three piezoelectric actuators 3 can move at different positions in the axial direction of the motor output shaft 21, as shown in fig. 2. The fastening device 6 is provided with an axial through hole 61, the tail end of the piezoelectric actuator 61 can move in the axial through hole, the fastening device 6 is provided with a limiting hole which is communicated with the axial through hole 61 and is perpendicular to the axial through hole, and a manual tightening screw 62 which can fasten the tail end of the piezoelectric actuator for limiting is arranged in the limiting hole.

Under the real-time working condition, the first acceleration sensor 5a collects vibration signals of the shell and then transmits the vibration signals into the adaptive controller 4 to serve as a signal input end of an RLS adaptive algorithm or an LMS adaptive algorithm or an FxLMS adaptive algorithm or a PID adaptive control algorithm in the adaptive controller 4, the second acceleration sensor 5b similarly transmits the collected vibration signals to the other signal input end of the adaptive controller 4 to serve as expected signals in the adaptive control algorithm, input signals collected by the first acceleration sensor 5a are subjected to iterative operation of the adaptive algorithm in the adaptive controller 4 to output control commands to the piezoelectric actuator 3 in real time, the piezoelectric actuator 3 performs corresponding action output according to the control commands to counteract the vibration of the output shaft of the motor, and after vibration control begins, real-time vibration signals collected by the second acceleration sensor 5b and signals before the last iterative control output are subjected to difference operation And obtaining an adjusting error, feeding back the obtained real-time adjusting error signal to iteration of the adaptive control algorithm, and continuously adjusting the convergence condition of the adaptive control algorithm, so that the output of the control signal is continuously optimized, namely the action mode of the piezoelectric actuator 3 is continuously adjusted, and the overall vibration control effect of the booster pump tends to be optimal.

In addition, considering that dynamic vibration amplitudes of different positions of the motor output shaft are different in the working process, in order to control the vibration of the motor output shaft more pertinently to improve the vibration control level of the whole machine, in the embodiment, the piezoelectric actuator 3 acts on the most remarkable part of the vibration of the motor output shaft by moving the piezoelectric actuator, so that the piezoelectric actuator acts on a place with larger vibration on the motor output shaft more effectively, the vibration of the whole machine is restrained more effectively, and the three piezoelectric actuators 3 can act on three different positions of the motor output shaft. And the most obvious part of the output shaft of the motor vibrates can be detected by the displacement sensor.

Example two

Unlike the first embodiment, the fastening device 6 is connected with a driving device 7, the driving device 7 can drive the fastening device 6 to move along the slide rail groove 11, so as to drive the piezoelectric actuator to move along the axial direction of the output shaft of the motor, and the driving device 7 is an electric push rod, as shown in fig. 3.

Claims

1. The utility model provides a booster pump, includes the casing, sets up the motor element in the casing, and motor element has motor output shaft, its characterized in that: the piezoelectric actuator is arranged in the shell, is in contact with the output shaft of the motor and can generate vibration after being electrified so as to offset the vibration generated when the output shaft of the motor works, and can move along the axial direction of the output shaft of the motor.

2. The booster pump assembly of claim 1, wherein: the piezoelectric actuator is connected with a driving device capable of driving the piezoelectric actuator to move along the axial direction of the output shaft of the motor.

3. The booster pump assembly of claim 1, wherein: still include the self-adaptation controller of being connected with the piezoelectricity actuator electricity, the signal of telecommunication intensity of piezoelectricity actuator is controlled by the self-adaptation controller, be equipped with the acceleration sensor who is used for detecting casing vibration signal in the casing, the feedback signal that the self-adaptation controller control was gathered according to acceleration sensor to constantly adjust the signal of telecommunication intensity of piezoelectricity actuator.

4. A booster pump assembly as set forth in claim 3, wherein: the acceleration sensor comprises a first acceleration sensor and a second acceleration sensor, and the first acceleration sensor and the second acceleration sensor are used as two signal input ends of the self-adaptive controller and are electrically connected with the self-adaptive controller.

5. A booster pump assembly according to claim 3 or 4, wherein: the self-adaptive controller adopts an RLS self-adaptive algorithm or an LMS self-adaptive algorithm or an FxLMS self-adaptive algorithm or a PID self-adaptive control algorithm.

6. The booster pump assembly of claim 1 or 2 or 3 or 4, wherein: the piezoelectric actuators are three and are evenly distributed along the circumferential direction of the output shaft of the motor.

7. The booster pump assembly of claim 1 or 2 or 3 or 4, wherein: the motor is characterized in that a bearing is sleeved on the motor output shaft, the front end of the piezoelectric actuator is in contact with the bearing, the tail end of the piezoelectric actuator is connected with the inner wall of the shell through a fastening device, and the driving device is connected with the fastening device and drives the piezoelectric actuator to move along the axial direction of the motor output shaft by driving the fastening device to move.

8. The booster pump assembly of claim 7, wherein: the fastening device is provided with an axial through hole, and the tail end of the piezoelectric actuator can move in the axial through hole.

9. The booster pump assembly of claim 7, wherein: the inner wall of the shell is provided with a slide rail groove which is convenient for the fastening device to slide; the driving device is an electric push rod.

10. The booster pump assembly of claim 7, wherein: the fastening device is provided with a limiting hole which is communicated with the axial through hole and is perpendicular to the axial through hole, and a manual tightening screw capable of fastening and limiting the tail end of the piezoelectric actuator is arranged in the limiting hole.