CN214403918U - Direct-current variable-frequency diaphragm booster pump - Google Patents

Abstract

The utility model discloses a direct current frequency conversion diaphragm booster pump, which relates to the field of water pumps, and comprises a diaphragm booster pump head, a driving motor and a frequency conversion controller, wherein the driving motor is a brushless motor and comprises a casing, a stator assembly and a rotor assembly, the rotor assembly comprises a motor rotating shaft, a plastic bushing and a polar anisotropic sintered ferrite magnetic ring, and the motor rotating shaft, the plastic bushing and the polar anisotropic sintered ferrite magnetic ring are integrally injection-molded; the frequency conversion controller is fixedly connected with the shell and electrically connected with the brushless motor. The utility model provides a direct current frequency conversion diaphragm booster pump adopts the brushless motor after the improvement as the power supply of diaphragm booster pump head, convenient equipment, and compact structure, stability are strong to cooperation frequency conversion controller can reach energy-conserving effect, satisfies high efficiency, economize the energy, low noise, low vibrations, durability height, life-span height, the domestic booster pump market demand that maintenance problem is few.

Description

Direct-current variable-frequency diaphragm booster pump

Technical Field

The utility model relates to a water pump field, concretely relates to direct current frequency conversion diaphragm booster pump.

Background

In recent years, the trend of energy conservation, environmental protection, intelligence and health of global household appliances is more and more obvious, the energy-saving, environmental protection, intelligence and health household appliances become inevitable choices for the development of the household appliances, and gradually serve as a middle-high-end market leading role.

Firstly, the market scale is further expanded, and high cost is brought to large-scale application of enterprises due to high price, so that many enterprises are forbidden to use the brush motor product instead, the potential demand of the brushless motor is still not fully released, and sufficient development space is provided in the future. The energy consumption of household appliances is a main component of the total energy consumption of the household.

Under the trend of energy conservation and environmental protection globalization, the high efficiency, energy conservation and environmental protection of household appliances become important indexes concerned by household appliance manufacturers, and the market share of the high efficiency, energy conservation and household appliances is continuously increased.

The energy saving and environmental protection of the household appliances are not only embodied in the aspects of saving electricity and saving water and reducing emission in use, but also embodied in the whole life cycle of design, manufacture, use, scrapping and recovery.

At present, a brush motor is mainly adopted as a power source of the diaphragm booster pump in the market, and the main reason is that the brush motor is simple in structure, stable in operation and good in starting and braking effects.

However, the brush motor has the defects that the brush motor is applied to the diaphragm booster pump, because of the self structural characteristics of the brush motor, friction exists between the brush and the commutator, the efficiency is reduced, the noise is increased, the heat is easy to generate, and the service life of the brush motor is several times shorter than that of a brushless motor; because the use of the electric brush has abrasion consumption, the electric brush needs to be changed continuously, and the maintenance is troublesome; because the resistance is large, the efficiency is low and the output power is low; the brush and commutator friction can cause sparking and high interference.

Therefore, a scheme of the booster pump with simple structure and convenient maintenance is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a direct current frequency conversion diaphragm booster pump, it is including adopting modified brushless motor as the power supply to cooperate the converter, carry out frequency conversion control to brushless motor, this direct current frequency conversion diaphragm booster pump of frequency conversion has simple structure and energy-conserving efficient advantage.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a direct-current variable-frequency diaphragm booster pump comprises a diaphragm booster pump head and a driving motor which is connected with the diaphragm booster pump head and drives the diaphragm booster pump head to run, wherein the driving motor is a brushless motor, the brushless motor comprises a shell, a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are arranged in the shell, the rotor assembly comprises a motor rotating shaft, a plastic bushing and a polar anisotropic sintered ferrite magnetic ring, the plastic bushing and the polar anisotropic sintered ferrite magnetic ring are sequentially sleeved on the outer wall of the motor rotating shaft from inside to outside, and the motor rotating shaft, the plastic bushing and the polar anisotropic sintered ferrite magnetic ring are integrally molded by injection;

the direct-current variable-frequency diaphragm booster pump further comprises a variable-frequency controller, wherein the variable-frequency controller is fixedly connected with the casing, and the variable-frequency controller is electrically connected with the brushless motor.

Through the arrangement, the structure of the brushless motor is improved, so that the structure is simple in assembly mode, only 1 magnetic ring is required to be installed, the magnetic tiles are not required to be bonded in place one by one, the shielding effect is naturally formed by the characteristics of the magnetic rings, the magnetic flux density characteristic is multiplied, the motor shaft and the anisotropic sintered ferrite magnetic ring are connected in an integral injection molding mode through the plastic bushing, any magnetic conductive material is not required to be added in the middle, the overall weight of the rotor is favorably reduced, and the overall weight of the motor is further reduced;

in addition, still through setting up frequency conversion controller, carry out frequency conversion control to brushless motor for this direct current brushless booster water pump can be according to using the different output of adjusting of operating mode, reaches energy-conserving effect.

Preferably, the stator assembly comprises an insulating framework, laminated silicon steel sheets and a winding coil, the insulating framework is fixed on the inner wall of the casing, the laminated silicon steel sheets are arranged on the inner wall of the insulating framework, and the winding coil is arranged outside the laminated silicon steel sheets.

Through setting up like this, by insulating skeleton, fold and press silicon steel sheet and winding coil to form stator module, simple structure.

Furthermore, insulating skeleton, fold and press silicon steel sheet and winding coil to assemble into an organic whole and then be fixed in the casing, through setting up like this, can be convenient for maintain stator module overall change.

Preferably, the rotating shaft of the motor is a non-ferromagnetic spindle.

Through setting up like this, both can lighten motor weight, can not reduce the performance that the magnetism traded moreover, and practice thrift installation and magnetic material cost greatly for the utilization ratio of magnetic ring is higher.

Further, the motor shaft may be made of metals other than fe-co-ni and its alloys, and their corresponding alloys, such as al-alloys.

Preferably, a mounting platform for mounting the variable frequency controller is arranged outside the casing, a mounting bottom plate is arranged on the mounting platform, and the variable frequency controller is fixed on the mounting bottom plate.

Through setting up like this, be convenient for be fixed in the casing with frequency conversion controller.

Preferably, the mounting base plate is a shock-absorbing foam plate.

Through setting up like this, be favorable to reducing the working process of motor in to the frequency conversion controller transmission vibration, improve its job stabilization nature.

Preferably, a supporting boss is arranged on one surface of the mounting base plate, which is in contact with the variable frequency controller, a gap is kept between the top of the supporting boss and the surface of the mounting base plate, and the supporting boss is abutted to the surface of the variable frequency controller.

Through setting up like this, back on the frequency conversion controller fixed mounting bottom plate, support the boss and make mounting bottom plate and frequency conversion controller keep the clearance before the surface, the heat dissipation of being convenient for reduces the heat that produces in the brushless motor working process and directly transmits to frequency conversion controller to lead to the phenomenon that the inside temperature of frequency conversion controller rises, thereby can reach the ageing process that delays the inside electronic components of frequency conversion controller, extension frequency conversion controller's life.

Preferably, a heat dissipation fin structure is disposed outside the chassis.

Through setting up like this, be favorable to brushless motor's heat dissipation.

Preferably, the heat dissipation fin structure comprises a plurality of heat dissipation fins, the heat dissipation fins are fixed on the outer wall of the casing, the casing is cylindrical, and the heat dissipation fins are uniformly distributed on two sides of the mounting platform at intervals along the radial direction of the casing.

Through setting up like this, the radiating effect improves.

Preferably, a damping structure is arranged on one side of the machine shell close to the bottom.

Through setting up like this, shock-absorbing structure can reduce brushless motor installation back and by the vibration transmission between the fixed carrier, is favorable to the noise reduction to produce.

Preferably, one side of the bottom of the casing is provided with a fixed wing plate, the fixed wing plate is provided with a connecting clamping groove, the damping structure comprises a plurality of damping columns, and the damping columns are clamped in the connecting clamping groove.

Through setting up like this, convenient assembling is convenient for produce.

Compared with the prior art, the utility model discloses profitable technological effect has been obtained:

1. the utility model provides a direct current frequency conversion diaphragm booster pump adopts the brushless motor after the improvement as the power supply of diaphragm booster pump head, convenient equipment, and compact structure, stability are strong to cooperation frequency conversion controller can reach energy-conserving effect, satisfies high efficiency, economize the energy, low noise, low vibrations, durability height, life-span height, the domestic booster pump market demand that maintenance problem is few.

2. The stator assembly is formed by the insulating framework, the laminated silicon steel sheets and the winding coil, and the structure is simple.

3. The motor rotating shaft can adopt a non-magnetic-conductive mandrel, so that the weight of the motor can be reduced, the magnetic exchange performance cannot be reduced, the installation and magnetic conductive material cost is greatly saved, and the utilization rate of the magnetic ring is higher.

4. Still set up the shock attenuation cystosepiment, be favorable to improving frequency conversion controller's stability in use, set up shock-absorbing structure, the production of noise reduction ability.

Drawings

FIG. 1 is an explosion diagram of the overall structure of the DC variable frequency diaphragm booster pump of embodiment 1 of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic view of an internal structure of a brushless motor according to embodiment 1 of the present invention;

fig. 4 is a front view of a stator assembly in embodiment 1 of the present invention;

FIG. 5 is a cross-sectional view taken along the plane A-A in FIG. 4;

fig. 6 is an exploded view of the overall structure of a rotor assembly in embodiment 1 of the present invention;

fig. 7 is a sectional view showing the overall structure of a rotor assembly according to embodiment 1 of the present invention;

FIG. 8a is a schematic view of the anisotropy of radiation orientation and the polarity of a tile magnet in the prior art;

fig. 8b is a schematic view of polarity of the anisotropic sintered ferrite bead in embodiment 1 of the present invention;

FIG. 8c is a waveform comparison of the surface magnetic flux density distributions of the different polarity distributions of FIGS. 8a and 8 b;

fig. 9 is a schematic view of structural connection between the mounting baseplate and the frequency conversion controller in embodiment 2 of the present invention.

Wherein, the technical characteristics that each reference numeral refers to are as follows:

1. a diaphragm booster pump head; 2. a drive motor; 201. a housing; 2011. mounting a bottom plate; 20111. supporting the boss; 2012. a heat sink fin structure; 202. a stator assembly; 2021. a rim skeleton; 2022. laminating silicon steel sheets; 2023. a winding coil; 203. a rotor assembly; 2031. a motor shaft; 20311. injection molding a groove; 2032. a plastic bushing; 20321. a sleeve portion; 203211, a protrusion; 20322. a limiting end part; 20323. an inner cylinder structure part; 20324. a rib structure; 2033. a polar anisotropic sintered ferrite bead; 20331. an annular blocking edge; 20332. a pit; 3. a variable frequency controller; 4. a front end cover; 401. a bearing; 5. a rear end cap; 6. a screw; 7. a shock-absorbing structure; 701. a shock-absorbing post; 7011. clamping the ring groove; 8. a fixed wing plate; 801. a connecting clamping groove; 8011. a guide portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following specific embodiments.

Example 1

Referring to fig. 1 to 7, the present embodiment discloses a direct current variable frequency diaphragm booster pump, which includes a diaphragm booster pump head 1 and a driving motor 2 connected to and driving the diaphragm booster pump head 1 to operate, wherein the diaphragm booster pump head 1 adopts an existing booster pump head.

The driving motor 2 is a brushless motor, which includes a housing 201, a stator assembly 202 and a rotor assembly 203 disposed in the housing 201, the rotor assembly 203 includes a motor shaft 2031, a plastic bushing 2032 and a polar anisotropic sintered ferrite bead 2033, the plastic bushing 2032 and the polar anisotropic sintered ferrite bead 2033 are sequentially sleeved on an outer wall of the motor shaft 2031 from inside to outside, the motor shaft 2031, the plastic bushing 2032 and the polar anisotropic sintered ferrite bead 2033 are injection molded into a whole, and no magnetic conductive material is required to be added in the middle.

Referring to fig. 6, a plurality of injection grooves 20311 are formed on an outer wall of the middle portion of the motor shaft 2031 at intervals in a radial direction thereof, so that the plastic bushing 2032 is injection-molded to have an enhanced fastening property with the motor shaft 2031.

The two ends of the anisotropic sintered ferrite magnetic ring 2033 form annular retaining edges 20331 towards the middle, one side of the annular retaining edges 20331 towards the center is provided with a plurality of pits 20332, the plastic bushing 2032 after injection molding comprises a sleeve portion 20321 and limiting end portions 20322 at the two ends of the sleeve, a motor shaft 2031 is fixed at the centers of the limiting end portions 20322 and the sleeve portion 20321, a protrusion 203211 is formed at the limiting end portions 20322, and the protrusion 203211 is matched with the pits 20332.

Referring to fig. 6 and 7, the plastic bushing 2032 is hollow, an inner cylindrical structure 20323 is formed inside the sleeve portion 20321, a gap is maintained between the inner cylindrical structure 20323 and the sleeve portion 20321, the inner cylindrical structure 20323 and the sleeve portion 20321 are connected by a rib structure 20324, and the motor shaft 2031 is connected to the inner cylindrical structure 20323.

By such an arrangement, the weight of the rotor assembly 203 can be further reduced, and the weight of the entire motor can be reduced.

The direct-current variable-frequency diaphragm booster pump further comprises a variable-frequency controller 3, the variable-frequency controller 3 is an AC-DC variable-frequency controller 3, the variable-frequency controller 3 is fixedly connected with the casing 201, and the variable-frequency controller 3 is electrically connected with the brushless motor.

Further, the anisotropic sintered ferrite bead 2033 is a bead using the conventional Halbach (Halbach) magnetizing method, and referring to fig. 8a, 8b and 8c, the bead uses the Halbach array magnetizing method, and the surface magnetic field is in a standard sine wave distribution; the magnetic flux density at the middle position of the pole is more concentrated, and the magnetic field intensity is higher, so that the magnetic density characteristic of the brushless motor is enhanced, and the designed power density and efficiency of the whole motor are greatly improved.

The mutual superposition of the parallel magnetic field and the radial magnetic field after the decomposition of the Halbach magnetic ring greatly improves the magnetic field intensity on the other side, so that the size of the motor can be effectively reduced, and the power density of the motor is improved.

Because the resonance density magnetic field inevitably has harmonic waves, the Halbach array resonance magnetic field has higher sine distribution degree and small harmonic content, so the stator and rotor components 203 do not need chute design.

The unilateral magnetic field distribution generated by the Halbach magnetic ring self-inhibition effect does not need a magnetic material to provide a passage for the rotor, so that the system has lower rotational inertia and better quick response performance.

As a result of the branch magnetization of the Halbach array magnet ring, the working point of the permanent magnet is higher and generally exceeds 0.9, so that the utilization rate of the ferrite magnet is improved.

The Halbach array magnetic ring not only greatly reduces the cogging torque and the starting torque effect, but also further improves the performance problems of the motor such as efficiency, vibration and noise, and further reduces the structural cost of the motor.

Referring to fig. 4, the rotor assembly 203 is fitted with the stator assembly 202 using a pole slot number of 12 slots and 8 poles.

Referring to fig. 1 and 3, the casing 201 is further connected to a front end cover 4 and a rear end cover 5, the front end cover 4 and the rear end cover 5 are positioned and fastened with the casing 201 through screws 6, a bearing 401 is respectively sleeved at the front end and the rear end of the motor rotating shaft 2031, and the bearing 401 is fixed on the front end cover 4/the rear end cover 5.

The stator assembly 202 includes an insulating framework 2021, a laminated silicon steel sheet 2022, and a winding coil 2023, the insulating framework 2021 is fixed to the inner wall of the casing 201, the laminated silicon steel sheet 2022 is disposed on the inner wall of the insulating framework 2021, and the winding coil 2023 is disposed outside the laminated silicon steel sheet 2022.

Further, the insulating framework 2021, the laminated silicon steel sheet 2022 and the winding coil 2023 are assembled into a whole and then fixed in the casing 201, so that the stator assembly 202 can be integrally replaced and maintenance is facilitated.

The motor shaft 2031 is a non-ferromagnetic spindle.

Further, the motor shaft 2031 may be made of metals other than fe, co, ni and their alloys, such as al alloy.

A mounting platform (not labeled in the figure) for mounting the frequency conversion controller 3 is arranged outside the casing 201, a mounting bottom plate 2011 is arranged on the mounting platform, and the frequency conversion controller 3 is fixed on the mounting bottom plate 2011.

The mounting base 2011 is a shock absorbing foam board.

Referring to fig. 1, a heat dissipation fin structure 2012 is disposed outside the chassis 201.

The heat dissipation fin structure 2012 includes a plurality of heat dissipation fins (not labeled in the figure), the plurality of heat dissipation fins are fixed on the outer wall of the casing 201, the casing 201 is cylindrical, and the plurality of heat dissipation fins are uniformly distributed on two sides of the mounting platform along the radial direction of the casing 201 at intervals.

Referring to fig. 1 and 2, a shock absorbing structure 7 is disposed on a side of the housing 201 close to the bottom.

One side that casing 201 leans on the bottom is provided with fixed pterygoid lamina 8, and fixed pterygoid lamina 8 sets up two, is located the left and right sides of casing 201 respectively, has seted up connection slot 801 on the fixed pterygoid lamina 8, and shock-absorbing structure 7 includes a plurality of shock absorber posts 701, and shock absorber posts 701 joint is in connection slot 801.

Referring to fig. 2, the connecting slot 801 includes a guiding portion 8011 and a clamping portion (not labeled in the figure), an included angle of 30-60 degrees is formed between the guiding portion 8011 and the edge of the fixed wing plate 8, and the clamping portion is connected to the guiding portion 8011 and is circular.

The shock absorber column 701 is the flexible material post, for example the rubber column, and the middle part of shock absorber column 701 is provided with cylindric joint annular 7011, is connected with joint portion through joint annular 7011 to realize shock absorber column 701's fixed, easy to assemble changes the maintenance with dismantling.

Referring to fig. 8a, 8b and 8c, the polar anisotropy sintered ferrite bead and the radiation orientation anisotropy of the diaphragm booster pump and the polarity distribution between the tile magnets are shown as the waveform contrast diagrams of the surface magnetic flux density distribution.

Example 2

Referring to fig. 9, the present embodiment discloses another dc variable frequency diaphragm booster pump, which is based on embodiment 1 and is different from the present embodiment in that:

a support boss 20111 is provided on one surface of the mounting base plate 2011 that contacts the frequency conversion controller 3, a gap is maintained between the top of the support boss 20111 and the surface of the mounting base plate 2011, and the support boss 20111 abuts against the surface of the frequency conversion controller 3.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the specification, the terms are used for convenience of description and do not limit the utility model in any way.

Claims (10)

1. The utility model provides a direct current frequency conversion diaphragm booster pump, includes diaphragm booster pump head (1) and is connected and drives its moving driving motor (2) with diaphragm booster pump head (1), its characterized in that: the driving motor (2) is a brushless motor, the brushless motor comprises a machine shell (201), a stator assembly (202) and a rotor assembly (203) which are arranged in the machine shell (201), the rotor assembly (203) comprises a motor rotating shaft (2031), a plastic bushing (2032) and a polar anisotropic sintered ferrite magnetic ring (2033), the plastic bushing (2032) and the polar anisotropic sintered ferrite magnetic ring (2033) are sequentially sleeved on the outer wall of the motor rotating shaft (2031) from inside to outside, and the three components of the motor rotating shaft (2031), the plastic bushing (2032) and the polar anisotropic sintered ferrite magnetic ring (2033) are molded into a whole by injection;

this direct current frequency conversion diaphragm booster pump still includes frequency conversion controller (3), frequency conversion controller (3) with casing (201) fixed connection, frequency conversion controller (3) and this brushless motor electric connection.

2. The direct-current variable-frequency diaphragm booster pump according to claim 1, wherein the stator assembly (202) comprises an insulating framework (2021), a laminated silicon steel sheet (2022) and a winding coil (2023), the insulating framework (2021) is fixed on the inner wall of the casing (201), the laminated silicon steel sheet (2022) is arranged on the inner wall of the insulating framework (2021), and the winding coil (2023) is arranged outside the laminated silicon steel sheet (2022).

3. The direct-current variable-frequency diaphragm booster pump according to claim 1, wherein the motor shaft (2031) is a non-ferromagnetic spindle.

4. The direct-current variable-frequency diaphragm booster pump according to claim 1, wherein a mounting platform for mounting the variable-frequency controller (3) is arranged outside the casing (201), a mounting bottom plate (2011) is arranged on the mounting platform, and the variable-frequency controller (3) is fixed on the mounting bottom plate (2011).

5. The direct current variable frequency diaphragm booster pump of claim 4, wherein the mounting base plate (2011) is a shock absorbing foam plate.

6. The direct-current variable-frequency diaphragm booster pump according to claim 5, wherein a supporting boss (20111) is arranged on one surface of the mounting base plate (2011) which is in contact with the variable-frequency controller (3), a gap is kept between the top of the supporting boss (20111) and the surface of the mounting base plate (2011), and the supporting boss (20111) is abutted to the surface of the variable-frequency controller (3).

7. The direct-current variable-frequency diaphragm booster pump according to claim 4, wherein a heat dissipation fin structure (2012) is arranged outside the casing (201).

8. The direct-current variable-frequency diaphragm booster pump according to claim 7, wherein the heat dissipation fin structure (2012) comprises a plurality of heat dissipation fins fixed on the outer wall of the casing (201), the casing (201) is cylindrical, and the plurality of heat dissipation fins are uniformly distributed on two sides of the mounting platform along the radial direction of the casing (201).

9. The direct-current variable-frequency diaphragm booster pump according to claim 1, wherein a damping structure (7) is arranged on one side of the casing (201) close to the bottom.

10. The direct-current variable-frequency diaphragm booster pump according to claim 9, wherein a fixed wing plate (8) is arranged on one side of the bottom of the casing (201), a connecting slot (801) is formed in the fixed wing plate (8), the damping structure (7) comprises a plurality of damping columns (701), and the damping columns (701) are clamped in the connecting slot (801).

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