CN203978858U - Anti-blocking brushless DC water pump - Google Patents

Abstract

The utility model discloses an anti-blocking brushless direct current water pump, which comprises a pump shell, a front end cover, a rear end cover, a rotor, a stator, an impeller and a blocking frame, wherein the front end cover and the rear end cover are correspondingly covered at two ends of the pump shell; the utility model discloses structural design is ingenious, reasonable, adds to be equipped with and keeps off the frame, can prevent effectively that the large granule foreign matter from getting into between rotor and the stator, guarantees normal operating, and job stabilization nature is good, effective increase of service life. The graphite shaft sleeves are selected at the two ends, so that the lubricating effect is good, the friction force is further reduced, the vibration is reduced, the noise is reduced, and the working stability is good; in addition, the water outlet and the water inlet are arranged on the same axis, so that water inlet and outlet are smooth, the water supply effect is improved, the installation and the use are convenient, the water supply device can be suitable for assembly of certain occasions, different installation and use requirements are met, and the water supply device is beneficial to wide popularization and application.

Description

Anti-blocking brushless DC water pump

technical field

The utility model relates to the technical field of water pumps, in particular to an anti-blocking brushless DC water pump.

Background technique

A pump is a machine that transports or pressurizes a liquid. It transmits the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali, emulsions, suspoemulsions and liquid metals, etc., and can also transport liquid and gas mixtures. and liquids containing suspended solids.

The gap between the rotor and the stator in the existing brushless DC water pump is directly exposed, so that large particles of foreign matter in the water can easily enter between the rotor and the stator, and then block the rotor, causing the pump to not work normally and greatly shortening the pump life. service life.

Utility model content

In view of the above shortcomings, the purpose of this utility model is to provide an anti-blocking brushless DC water pump with ingenious and reasonable structural design, which can effectively prevent large particles of foreign matter from entering between the rotor and stator, reliable operation, and long service life.

In order to achieve the above purpose, the technical solution provided by the utility model is: an anti-blocking brushless DC water pump, which includes a pump casing, a front end cover, a rear end cover, a rotor, a stator, an impeller and a retaining frame, the front end cover and The rear end cover is correspondingly covered on both ends of the pump casing. The middle position of the front end surface of the pump casing is inwardly recessed to form a rotor cavity for setting the rotor. The rear end surface of the pump casing corresponds to the peripheral position of the rotor cavity inward. Concave to form a stator cavity for setting the stator, the stator is set in the stator cavity, the rotor is set in the rotor cavity, the stop frame is set on the opening of the rotor cavity, and the impeller is set on the rotating shaft of the stator superior.

As an improvement of the present utility model, the stop frame includes a circular body, and a shaft hole is arranged at the center of the round body, and a graphite bushing adapted to the rotating shaft of the stator is arranged on the shaft hole , the periphery of the circular body is symmetrically provided with a plurality of fixed connecting rods, and the pump casing is provided with a positioning installation groove suitable for the fixed connecting rods, corresponding to the gap between two adjacent fixed connecting rods. There is a notch on the circular body at the position.

As an improvement of the utility model, the bottom surface of the inner cavity of the rotor cavity is provided with a graphite bushing adapted to the rotating shaft of the stator. Graphite bushing is used, which has a good lubricating effect, can effectively reduce friction and improve work efficiency.

As an improvement of the utility model, the impeller is a closed impeller, which can effectively increase the head of the water pump.

As an improvement of the utility model, the front end cover is provided with a water inlet, and the rear end cover is provided with a water outlet, and the water outlet and the water inlet are on the same axis. Not only the water in and out is smooth, but also the water supply effect is improved, and the installation and use are convenient, which can be suitable for assembly in some occasions and meet different installation and use requirements.

The beneficial effects of the utility model are as follows: the utility model has an ingenious and reasonable structural design, and is equipped with a retaining frame, which can effectively prevent large particles of foreign matter from entering between the rotor and the stator, ensure normal operation, have good working stability, and effectively prolong the service life. Moreover, graphite bushings are used at both ends, which has a good lubricating effect and further reduces friction, thereby reducing vibration, reducing noise, good working stability, low loss, reliable operation, and high work efficiency; in addition, the water outlet and the water inlet On the same axis, not only the water in and out is smooth, the water supply effect is improved, but also the installation and use are convenient, which can be suitable for assembly on certain occasions and meet different installation and use requirements, which is conducive to wide application.

Below in conjunction with accompanying drawing and embodiment, the utility model is further described.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model.

FIG. 2 is a schematic diagram of a full cross-section of FIG. 1 .

FIG. 3 is a schematic diagram of an exploded structure of FIG. 1 .

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3, an anti-blocking brushless DC water pump provided in this embodiment includes a pump casing 1, a front end cover 2, a rear end cover 3, a rotor 4, a stator 5, an impeller 6 and a retaining frame 7. The front end cover 2 and the rear end cover 3 are respectively covered on both ends of the pump casing 1, and the middle position of the front end surface of the pump casing 1 is inwardly recessed to form a rotor chamber for setting the rotor 4. The pump The rear end surface of the shell 1 is recessed inward corresponding to the peripheral position of the rotor cavity to form a stator cavity for setting the stator 5, the stator 5 is set in the stator cavity, and then the opening of the stator cavity is closed, and the rotor 4 is set In the rotor chamber, the baffle frame 7 is arranged on the opening of the rotor chamber, and the impeller 6 is arranged on the rotating shaft of the stator. Specifically, the stop frame 7 includes a circular body 71, the center of which is provided with a shaft hole, and the shaft hole is provided with a graphite shaft sleeve 51 adapted to the rotating shaft of the stator 5, The bottom surface of the inner cavity of the rotor cavity is provided with a graphite bushing 52 adapted to the rotating shaft of the stator 5 . Graphite shaft sleeves 51, 52 are used, which have good lubricating effect, can effectively reduce frictional force, and improve working efficiency. The periphery of the circular body 71 is symmetrically provided with a plurality of fixed connecting rods 72 , and the pump housing 1 is provided with positioning installation grooves 11 matching the fixed connecting rods 72 . The number of fixed connecting rods 72 is preferably four. During installation, the fixed connecting rod 72 can be aligned with the positioning installation groove 11, then placed in the positioning installation groove 11, and pasted and fixed by glue, so that it can be positioned and fixed on the opening of the rotor cavity. Notches 73 may also be provided on the circular body 71 corresponding to positions between two adjacent fixed connecting rods 72 . A gap 73 is provided to allow water to enter for cooling while preventing the entry of large particles of foreign matter to further ensure the stability of operation.

In this embodiment, the impeller 6 is preferably a closed impeller, which can effectively increase the head of the water pump. In other embodiments, other types of open impellers, semi-open impellers, etc. may be used.

The front end cover 2 is provided with a water inlet 21 , and the rear end cover 3 is provided with a water outlet 31 , and there is an axial gap between the outer wall of the rotor chamber and the inner wall of the pump casing 1 to form a water channel 8 . Preferably, the water outlet 31 and the water inlet 21 are on the same axis. That is, the angle between the water outlet 31 and the water inlet 21 is 180 degrees, not only the water in and out is smooth, and the water supply effect is improved, but also easy to install and use, suitable for assembly in certain occasions, and meet different installation and use requirements. For the convenience of installation, an internal thread can be provided on the water inlet 21, and an external thread can be provided on the water outlet 31, which is convenient for quick installation and use during use, and greatly improves work efficiency.

When working, turn on the power, the rotor 4 drives the impeller 6 to rotate, the liquid enters the pump casing 1 through the water inlet 21, and flows out from the water outlet 31 through the water channel 8 quickly. When large particles of foreign matter enter the pump casing 1, under the blocking action of the retainer 7, the large particles of foreign matter are effectively prevented from entering between the rotor 4 and the stator, ensuring normal operation, good working stability, and effectively extending the service life. Preferably, the control method of the anti-blocking brushless DC water pump of the present invention adopts a brushless and sensorless control mode, which is back electromotive force control technology. The analog electronic circuit is used to test its back electromotive force. Its advantage is that three position sensors are omitted, which makes the structure of the anti-blocking brushless DC water pump simple and suitable for long-term stable operation. This control method also increases the protection of the anti-blocking brushless DC water pump in different working conditions, such as high pressure, low pressure, overcurrent, overheating, water shortage, time delay, etc.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also change and modify the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this description, these terms are only for convenience of description, and do not constitute any limitation to the present invention. The use of other water pumps that are the same as or similar to them are all within the protection scope of the present invention.

Claims (5)

1. an anti-blocking brushless direct-current water pump, it is characterized in that, it comprises pump case, front cover, rear end cover, rotor, stator, impeller and divider, described front cover and rear end cover corresponding lid are combined in the two ends of pump case, the front-end face neutral position of described pump case inwardly concaves the rotor chamber that formation one is used for arranging rotor, the peripheral position in the ear end face respective rotor chamber of this pump case inwardly concaves the stator cavity that formation one is used for arranging stator, described stator arranges in this stator cavity, described rotor arranges in rotor chamber, described divider is arranged on the opening of this rotor chamber, described impeller is arranged in the rotating shaft of stator.

2. anti-blocking brushless direct-current water pump according to claim 1, it is characterized in that: described divider comprises a circular body, the central position of this circular body is provided with an axis hole, this axis hole is provided with the graphite bushing suitable with the rotating shaft of described stator, the periphery of described circular body is the center of circle and is arranged with many fixed connecting rods, and on described pump case, being provided with the location and installation groove suitable with this fixed connecting rod, the position between corresponding adjacent two fixed connecting rods is provided with breach in described circular body.

3. anti-blocking brushless direct-current water pump according to claim 1 and 2, is characterized in that: the inner chamber bottom surface of described rotor chamber is provided with the graphite bushing suitable with the rotating shaft of described stator.

4. anti-blocking brushless direct-current water pump according to claim 1 and 2, is characterized in that: described impeller is double shrouded wheel.

5. anti-blocking brushless direct-current water pump according to claim 1 and 2, is characterized in that: described front cover is provided with water intake, and described rear end cover is provided with water outlet, and this water outlet and described water intake are on same axis.