CN215719556U - Booster pump - Google Patents

Abstract

The utility model discloses a booster pump, and belongs to the technical field of water pumps. A booster pump for increasing water pressure, comprising: a water inlet; a water outlet; the impeller supercharging component is used for supercharging the water flow guided from the water inlet through rotation and guiding the water flow to the water outlet; the motor module is used for driving the impeller supercharging component to rotate; the motor module has a stator assembly and a rotor assembly; wherein, impeller pressure boost subassembly has: an impeller member rotating in synchronization with the rotor assembly; the impeller component is provided with a liquid inlet flow channel, a liquid outlet flow channel and a plurality of impeller sheets positioned between the liquid inlet flow channel and the liquid outlet flow channel; an inner sleeve member fitted around an inner side of the impeller member; the inner sleeve member has a mounting hole; a central shaft secured within the booster pump and passing through the impeller member and the mounting hole. The pressurizing of the flowing water is realized by the way of synchronously rotating the impeller member and the rotor assembly. Thus eliminating the need for bearings to reduce friction and ultimately reducing manufacturing costs.

Description

Booster pump

Technical Field

The utility model belongs to the technical field of water pumps, and particularly relates to a booster pump.

Background

At present, water pressure of water used for high-rise buildings is insufficient, so that a booster pump is required to be arranged to increase the water pressure. In the existing household booster pump, the impeller is driven to rotate by the traditional mechanism through the output shaft of the motor section, so that the boosting effect is realized. However, such a design has the disadvantage that several bearings need to be provided to reduce friction. However, the purchase cost of the bearings is high, and the price of the product corresponding to the booster pump is also increased. Further, the market competitiveness of the product is affected.

For example, the Chinese patent has the following patent numbers: 2020202573738, it specifically discloses a domestic booster pump motor, and motor and water pump design formula as an organic whole, effectual save space and can material saving, also can improve the axiality of water pump and motor simultaneously.

But above-mentioned technical scheme still has the great of equipment overall dimension, and the higher problem of price cost, when the application scene falls on specific certain such equipment as gondola water faucet, then can't satisfy corresponding market demand.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-cost booster pump which is more adaptive to the requirements of terminal equipment.

The purpose of the utility model is realized as follows: a booster pump for increasing water pressure, comprising:

the water inlet is used for being externally connected with an undervoltage waterway;

the water outlet is used for being externally connected with the supercharged water channel;

the impeller supercharging component is used for supercharging the water flow guided from the water inlet through rotation and guiding the water flow to the water outlet; and the number of the first and second groups,

the motor module is used for driving the impeller supercharging component to rotate; the motor module has a stator assembly and a rotor assembly;

wherein, impeller pressure boost subassembly has:

an impeller member rotating in synchronization with the rotor assembly; the impeller component is provided with a liquid inlet flow channel, a liquid outlet flow channel and a plurality of impeller sheets positioned between the liquid inlet flow channel and the liquid outlet flow channel;

an inner sleeve member fitted around an inner side of the impeller member; the inner sleeve member has a mounting hole;

and a central shaft secured within the booster pump and passing through the impeller member and the mounting hole.

Preferably, a groove is formed on an inner side wall of the mounting hole, and the groove is used for guiding water flow to enter a gap between the inner sleeve member and the central shaft.

Preferably, the recess extends through the entire mounting hole.

Preferably, the starting point and the end point of the groove are both positioned on the same side of the mounting hole for realizing dynamic balance.

Preferably, the groove is a single pitch helical groove.

Preferably, the number of the grooves is even, and the grooves are arranged in pairs in an opposite mode and used for realizing dynamic balance.

Preferably, the groove is a straight groove or a spiral groove or a slanted groove.

Preferably, the cross-sectional shape of the groove is a circular arc.

Preferably, the booster pump further comprises a pump body and an upper shell, and the central shaft is fixed between the pump body and the upper shell.

Preferably, a cushion block is arranged between the upper shell and the central shaft, an accommodating cavity is formed in the cushion block, and the central shaft abuts against the accommodating cavity.

Preferably, the impeller member is a plastic member, and the impeller member, the rotor assembly and the inner sleeve member are injection molded at one time during injection molding.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:

1. the booster pump improves the traditional mode that the output shaft of the motor drives the impeller to rotate. The pressurizing of the flowing water is realized by the way of synchronously rotating the impeller member and the rotor assembly. Thus eliminating the need for bearings to reduce friction and ultimately reducing manufacturing costs.

2. Through set up the recess on the endotheca member to can reduce the friction between endotheca member and the center pin and realize better lubricated effect, reduce wearing and tearing, the life of extension product.

Drawings

FIG. 1 is a schematic view of one embodiment of a booster pump according to the present invention;

FIG. 2 is a schematic view of a second embodiment of the booster pump of the present invention;

FIG. 3 is a top plan view of the booster pump of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a perspective view of the impeller booster assembly and rotor assembly;

FIG. 6 is a top view of the impeller booster assembly and rotor assembly;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;

FIG. 8 is a perspective view of the inner housing member of the first embodiment;

FIG. 9 is a top view of the inner housing member of the first embodiment;

fig. 10 is a perspective view of an inner sleeve member of the second embodiment;

fig. 11 is a sectional view of the inner sleeve member of the second embodiment;

FIG. 12 is a sectional view of a booster pump of the third embodiment;

fig. 13 is an exploded view of the spacer and central shaft.

In the figure: 1-a pump body; 2-an upper shell; 3-water inlet; 4-water outlet; 5-impeller supercharging component; 6-a motor module; 7-cushion block; 51-an impeller member; 52-inner sleeve member; 53-central axis; 61-a stator assembly; 62-a rotor assembly; 63-a housing; 71-an accommodating cavity; 511-a liquid inlet flow channel; 512-liquid outlet flow channel; 513-wheel sheet; 21-mounting holes; 522-grooves; 523-start point; 524-end point.

Detailed Description

The utility model is further described below in terms of specific examples.

The booster pump increases the water pressure, often by means of an external power supply, and then by means of the motor module 6 driving the impeller member 51. But a lack of lubrication occurs during high speed rotation of the impeller member 51. In order to solve the above technical problem, the following embodiments are specifically designed.

[ EXAMPLES one ]

In this embodiment, as shown in fig. 1 to 9, a booster pump is designed to increase the water pressure, and includes:

the water inlet 3 is externally connected with an undervoltage waterway; the under-pressure waterway means that the water pressure is lower and does not meet the requirement of a use scene, and does not particularly refer to the water pressure within a specific value range.

The water outlet 4 is externally connected with a pressurized waterway; in actual use, the water inlet 3 and the water outlet 4 are connected through a pipeline.

Also includes: the impeller pressurizing assembly 5 is used for pressurizing water flow guided from the water inlet 3 and guiding the water flow to the water outlet 4; that is to say, the impeller supercharging component 5 realizes supercharging the water flow at the water inlet 3 through the rotation of the impeller supercharging component itself, and then guides the supercharged water flow to the water outlet 4, thereby realizing the supercharging effect.

In addition the booster pump still include: the motor module 6 is used for driving the impeller supercharging component 5 to rotate; the electric machine module 6 has a stator assembly 61 and a rotor assembly 62; as a preferable technical solution, in this embodiment, the motor module 6 is a permanent magnet motor. Thus, in this embodiment, the rotor assembly 62 is a permanent magnet.

Wherein, impeller boost assembly 5 has:

an impeller member 51 rotating in synchronization with the rotor assembly 62; that is, in the present embodiment, the rotor assembly 62 of the motor module 6 is rotated in synchronization with the impeller member 51. Therefore, when the motor rotates, the impeller member 51 is also rotated in synchronization, thereby achieving the supercharging effect.

The impeller member 51 is provided with a liquid inlet flow passage 511, a liquid outlet flow passage 512 and a plurality of impeller pieces 513 positioned between the liquid inlet flow passage 511 and the liquid outlet flow passage 512; the rotation of the wheel blade 513 can realize the pressurization of the water flow, and at the same time, the water flow is guided from the liquid inlet flow passage 511 to the liquid outlet flow passage 512, and finally flows out from the water outlet 4.

The impeller supercharging assembly 5 further comprises an inner sleeve member 52 which is sleeved on the inner side of the impeller member 51; the inner sleeve member 52 has a mounting hole 521.

And a center shaft 53 fixed in the booster pump and passing through the mounting holes 521 of the impeller member 51 and the inner sleeve member 52.

The way and the working principle of the center shaft 53 will be explained first. In this embodiment, the output shaft of the conventional motor does not directly drive the impeller to rotate, so as to realize supercharging. In the present embodiment, as shown in fig. 4, after the rotor assembly 62 drives the impeller member 51 to rotate synchronously, the impeller member 51 rotates at a high speed. The impeller member 51 rotating at high speed necessarily needs a stable axis capable of rotating around the impeller member 51, so as to firmly lock the rotating axis of the impeller member 51, otherwise, if the shaking of the impeller member 51 exceeds a set value, the equipment is easily halted or the abrasion is too fast, and the service life and the service performance of the product are affected.

Therefore, in order to solve the above-mentioned technical problem, in the present embodiment, the central shaft 53 is disposed inside the impeller member 51, and the central shaft 53 is fixed inside the booster pump. As shown in fig. 4, in particular between the upper casing 2 and the pump body 1. Correspondingly, in the present embodiment, when the impeller member 51 rotates, the central shaft 53 is stationary, and even does not rotate around its own axis. It should be noted that in practical use, the central shaft 53 may also be fixed between the motor housing 63 and the pump body 1, or other positions that can make the central shaft 53 relatively fixed.

The corresponding problem is that there is a high-frequency, high-speed relative rotation between the impeller member 51 and the center shaft 53, and the high-speed rotation causes a problem that the temperature between the impeller member 51 and the center shaft 53 rapidly increases and the wear increases.

In the present embodiment, the impeller member 51 is a plastic member, which may seriously affect the stability of the shape and structure of the impeller member 51. Even causing partial structural hot-melt deformation of the impeller member 51.

In response to the above-described problems, an inner sleeve member 52 is disposed between the impeller member 51 and the center shaft 53.

Therefore, the inner sleeve member 52 in the present embodiment is required to serve as an intermediate medium, which can perform the functions of lubrication and cooling. However, in actual use, the mounting hole 521 of the inner sleeve member 52 is a straight through hole, and even if the inner sleeve member 52 is made of graphite, ceramic, stainless steel or other material, the wear is too fast, the lubrication is poor, and the temperature is too high.

In order to further solve the above technical problem, in the present embodiment, a groove 522 penetrating through the entire mounting hole 521 is formed on the inner sidewall of the mounting hole 521; the purpose of the through-mounting hole 521 is to more conveniently guide running water into the gap between the inner sleeve member 52 and the central shaft 53. Therefore, the purposes of lubricating, cooling, reducing abrasion and prolonging the service life of the product can be realized by quickly utilizing water flow.

It should be noted here that the clearance between the inner sleeve member 52 and the central shaft 53 should be a tightly controlled clearance fit, in other words, a small clearance. Whether or not breakthrough occurs also depends on the requirements of the particular process.

In practical use, since the inner sleeve member 52 rotates at a high speed, the dynamic balance of the inner sleeve member 52 needs to be considered, otherwise the operation of the impeller member 51 is adversely affected, and the magnetic field of the motor module 6 is affected, and the motor performance is affected, and finally the booster pump performance is affected.

In order to solve the above technical problem, as shown in fig. 7 to 8, the groove 522 is a spiral groove 522. Thus, the grooves 522 of the inner cover member 52 are substantially evenly distributed at various angles along the inner side wall of the mounting hole 521.

To further increase the effect of achieving dynamic balance, the start point and the end point of the spiral groove 522 are located on the same side of the mounting hole 521 for achieving dynamic balance.

As shown in fig. 9, the meaning of being located on the same side means that if the starting point 523 and the end point 524 of the spiral groove 522 are projected along the axial direction of the inner sleeve member 52, the starting point 523 and the end point 524 of the spiral groove 522 can substantially coincide on the projection plane. Even if they do not coincide, if the start point and the end point of the spiral groove 522 are respectively connected to the center of the circle in the projected graph, the two lines should be at an angle of less than 180 ° instead of being located at both sides. As a further optimized technical scheme, when the included angle of the two lines is smaller than 90 degrees, the effect on dynamic balance is better.

To further increase the effect of achieving dynamic balance, the helical groove 522 is a single pitch helical groove 522. The single-pitch design can make the movement track of the water flow shortest and make the passing performance of particles in water better.

Preferably, the cross-sectional shape of the groove 522 is a circular arc, which facilitates the customization of the tool on the lathe and reduces the processing cost.

[ example two ]

As shown in fig. 10 to 11, this embodiment is substantially the same as the first embodiment, except that the grooves 522 are straight grooves, and an even number of the grooves 522 are oppositely arranged in pairs for realizing dynamic balance. The design has the advantages that the processing difficulty can be reduced, and the processing cost is reduced.

[ EXAMPLE III ]

As shown in fig. 12 to 13, this embodiment is substantially the same as the first embodiment, except that in actual use, as shown in the sectional view of fig. 4, two washers, more specifically, ceramic washers are sleeved on the upper side of the central shaft.

And because the impeller member 51 is a plastic part, there are naturally injection molding errors, especially the difference in coaxiality between the upper and lower ends, and the poor roundness of the ends. And the impeller member 51 is rotated at high speed. Therefore, the problem of poor coaxiality needs to be solved, but if cutting machining is adopted, the equipment cost is increased, the physical properties such as strength of an injection molding part are reduced, and the equipment competitiveness is reduced.

In order to solve the above technical problem, in the present embodiment, a pad 7 is disposed at an end portion, particularly an upper end portion, of the central shaft 53, the pad 7 has a certain elasticity, and then a receiving cavity is formed in a middle portion of the pad, so that at least one end portion of the central shaft 53 abuts against the receiving cavity, thereby correcting an injection molding error caused by a plastic part by using the elasticity of the pad 7, reducing wear, and improving a service life of a product. The elastic magnitude of the cushion block 7 can be set according to actual conditions.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.

Claims (10)

1. A booster pump is used for increasing water pressure and is characterized by comprising:

the water inlet (3) is externally connected with an undervoltage waterway;

the water outlet (4) is externally connected with a pressurized waterway;

the impeller pressurizing assembly (5) is used for pressurizing water flow guided from the water inlet (3) through rotation and guiding the water flow to the water outlet (4); and the number of the first and second groups,

the motor module (6) is used for driving the impeller pressurizing assembly (5) to rotate; the electric machine module (6) has a stator assembly (61) and a rotor assembly (62);

wherein the impeller supercharging assembly (5) has:

an impeller member (51) that rotates in synchronization with the rotor assembly (62); the impeller member (51) is provided with a liquid inlet flow channel (511), a liquid outlet flow channel (512) and a plurality of impeller sheets (513) positioned between the liquid inlet flow channel (511) and the liquid outlet flow channel (512);

an inner sleeve member (52) fitted inside the impeller member (51); the inner sleeve member (52) has a mounting hole (521);

and a central shaft (53) fixed within the booster pump and passing through the impeller member (51) and the mounting hole (521).

2. The booster pump according to claim 1, wherein a groove (522) is formed on an inner sidewall of the mounting hole (521), the groove (522) for guiding a water flow into a gap between the inner race member (52) and the central shaft (53).

3. The booster pump of claim 2, wherein the groove (522) extends through the entire mounting hole (521).

4. The booster pump of claim 3, wherein the starting point and the ending point of the groove (522) are located on the same side of the mounting hole (521) for dynamic balance.

5. The booster pump of claim 3 or 4, wherein the grooves (522) are single pitch helical grooves.

6. The booster pump of claim 2, wherein an even number of said grooves (522) are arranged opposite to each other two by two for dynamic balancing.

7. The booster pump of claim 6, wherein the grooves (522) are straight grooves, or spiral grooves, or inclined grooves.

8. The booster pump according to claim 1, wherein the booster pump further comprises a pump body (1) and an upper casing (2), and the center shaft (53) is fixed between the pump body (1) and the upper casing (2).

9. Booster pump according to claim 8, characterized in that a resilient spacer (7) is arranged between the upper housing (2) and the central shaft (53), the spacer (7) being formed with a receiving cavity (71), the central shaft (53) resting in the receiving cavity (71).

10. The booster pump according to claim 1, wherein the impeller member (51) is a plastic member, and the impeller member (51), the rotor assembly (62), and the inner sleeve member (52) are injection molded at one time at the time of injection molding.

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