CN218093579U - Impeller subassembly and contain its water pump - Google Patents

Abstract

The utility model discloses an impeller subassembly and contain its water pump, including impeller shaft, the impeller dish that is fixed in the impeller shaft periphery and circumference array arrange in a plurality of main blades of impeller shaft periphery, the one end of main blade is connected with the impeller shaft surface and main blade is located the end face of impeller dish towards delivery port in the water pump; the maximum height of the main blade is H1, the minimum height of the main blade is H2, the distance from the surface of the main blade facing the impeller disc to the end surface, close to the water outlet, of the impeller shaft is H, and the diameter of the circumferential array of the main blade is d, so that the following conditions are met: h1: h =1/5 to 1/3; h2: d =0.2 to 0.8. The utility model discloses on the basis of satisfying water pump flow and lift, main blade maximum height reduces, and the impeller shaft is in delivery port department one-tenth optical axis structure, and the relative length of impeller shaft and blade increases, during impeller rotation, changes and produces the centripetal force, makes the foreign matter gathering of aquatic near the impeller shaft to discharge through the delivery port, have the effect of better emission foreign matter.

Description

Impeller assembly and water pump comprising same

Technical Field

The utility model relates to a water pump design technical field especially relates to an impeller subassembly and contain its water pump.

Background

The impeller assembly consists of an impeller shaft 1 and blades 15 (shown in figure 1), the impeller shaft is riveted with a motor shaft, the motor shaft is driven by the starting cavity coupler to rotate, and then the motor shaft drives the blades to rotate. The blades in the prior art are in trapezoid or square shapes, the maximum height of each blade usually occupies the length of the impeller shaft, so that the area of each blade is large, the blades occupy a large space of a water outlet of a water pump, the contact area of each blade and liquid is large, vibration generated is large, and when the impeller rotates, if foreign matters enter the impeller, the situation of insufficient centripetal force exists, the foreign matters cannot be completely discharged.

In addition, in the drainage process of the motor, the impeller moves towards the axial direction of the impeller shaft, and the impeller is higher than the outer end face of the motor shell by a certain height. At this moment, impeller and motor casing outer terminal surface will produce certain clearance, and the production in clearance leads to the foreign matter to get into the rotor chamber from the clearance easily, leads to the rotor to rotate the production noise.

SUMMERY OF THE UTILITY MODEL

The biggest height in order to solve prior art's impeller subassembly blade often occupies the length of impeller shaft more than half, shakes great and the foreign matter is difficult to the exhaust technical problem when leading to the impeller to rotate, the utility model provides an impeller subassembly and contain its water pump and solve above-mentioned problem.

The utility model provides an impeller assembly, which comprises an impeller shaft, an impeller disc fixed at the periphery of the impeller shaft and a plurality of main blades arranged at the periphery of the impeller shaft in a circumferential array manner, wherein one end of each main blade is connected with the outer surface of the impeller shaft, and the main blades are positioned on the end surface of the impeller disc facing a water outlet in a water pump; the maximum height of the main blade is H1, the minimum height of the main blade is H2, the distance from the surface of the main blade facing the impeller disc to the end face, close to the water outlet, of the impeller shaft is H, and the diameter of the circumferential array of the main blade is d, so that the following conditions are met: h1: h =1/5 to 1/3; h2: d =0.2 to 0.8.

Further, the main blades extend radially outward of the impeller shaft, and the diameter D of the impeller disk is larger than the diameter D of the circumferential array of the main blades.

Furthermore, a plurality of auxiliary blades are arranged at one end of the impeller disc, back to the main blades, and the auxiliary blades are arranged close to the outer edge of the impeller disc.

Furthermore, the impeller disc is positioned at one axial end of the impeller shaft, and one end of the impeller shaft close to the impeller disc is provided with a mounting hole for connecting a motor shaft in the water pump.

Furthermore, an annular retainer ring is arranged on the periphery of the impeller shaft positioned in the mounting hole, and the diameter of the annular retainer ring is smaller than the inner diameter of a motor shell in the water pump; and the axial end face of the annular retainer ring protrudes out of the axial end face of the auxiliary blade.

Furthermore, the outer ends of the auxiliary blades are attached to the outer edge of the impeller disc, and the radial length of the auxiliary blades is 3-5 mm.

Further, the number of the main blades is 4 or 5 or 6 or 8 or 9 or 10.

The utility model discloses still provide a water pump, including pump case, motor and above the impeller subassembly, the impeller shaft of impeller subassembly and the motor shaft fixed connection of motor are equipped with water inlet and the delivery port that communicates with the impeller subassembly in the pump case.

Further, the motor comprises a motor shell fixedly connected with the water pump shell, an impeller cavity for accommodating the impeller assembly is formed by enclosing the outer end faces of the water pump shell and the motor shell, a groove for accommodating the impeller disc is formed in the outer end face of the motor shell, and the diameter difference between the diameter of the groove and the diameter of the impeller disc is 0.1-0.15 mm.

Further, the motor still includes stator module, rotor subassembly, and the axial both ends of rotor subassembly are rotated through upper bearing and lower bearing and motor casing respectively and are connected, the injection molding body axial length L of rotor subassembly and the terminal surface distance M of upper bearing and lower bearing satisfy following relation: M-L =0-1.8mm.

The utility model has the advantages that:

(1) Impeller subassembly and contain its water pump, the main blade maximum height reduces, the impeller shaft is in delivery port department one-tenth optical axis structure, the relative length of impeller shaft and blade increases, when the impeller rotates, changes and produces centripetal force, makes the foreign matter gathering of aquatic near the impeller shaft to discharge through the delivery port, have the better effect of discharging the foreign matter.

(2) Impeller subassembly and contain its water pump, through the maximum height that reduces the main blade to the proportion of the minimum height of adjustment main blade and diameter, on the basis that satisfies water pump flow and lift, the blade area reduces 30% to 80% than prior art scheme, has directly reduced the area of contact of impeller subassembly with liquid, has reduced frictional force, the effectual noise that has reduced the impeller subassembly and has rotated and bring.

(3) Impeller subassembly and contain its water pump, the cooperation through auxiliary vane and annular retaining ring carries out comprehensive protection to the motor shaft, avoids the motor shaft to receive the drainage amount of deflection and fracture.

(4) Impeller subassembly and contain its water pump, through the axial displacement volume of control rotor subassembly, avoid the outer terminal surface of impeller dish protrusion motor casing, reduce the possibility that the foreign matter got into the rotor chamber.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of a prior art impeller assembly;

fig. 2 is a perspective view (from above looking down) of the impeller assembly of the present invention;

fig. 3 is a perspective view (from below looking up) of the impeller assembly of the present invention;

FIG. 4 is a front view of FIG. 2;

FIG. 5 isbase:Sub>A sectional view taken along line A-A of FIG. 4;

fig. 6 is a schematic view of a motor casing in the water pump of the present invention;

FIG. 7 is a schematic view of an embodiment of the water pump of the present invention (the pump housing is not shown);

FIG. 8 is a schematic diagram of an embodiment of the water pump of the present invention;

FIG. 9 is a table relating vane minimum height to noise.

In the figure, the impeller comprises an impeller shaft 1, an impeller shaft 101, an annular retainer ring 2, an impeller disc 3, a main blade 4, a motor shaft 5, a mounting hole 6, an auxiliary blade 7, a water pump shell 8, an impeller component 9, a motor shell 10, a water outlet 11, a pressure relief hole 12, a groove 13, an injection molding body 14, an upper bearing 15, a blade 16 and a lower bearing.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The utility model discloses use the axial of water pump as upper and lower direction, wherein be close to the one end of motor for the below, the one end that is close to the pump chamber is the top.

Example one

As shown in fig. 2-8, an impeller assembly comprises an impeller shaft 1, an impeller disc 2 fixed on the periphery of the impeller shaft 1, and a plurality of main blades 3 arranged on the periphery of the impeller shaft 1 in a circumferential array, wherein the impeller disc 2 is in a disc-shaped structure, and the main blades 3 are connected into a whole by the impeller disc 2, so that the main blades 3 have the effects of improving the strength and stability during rotation. One end of the main blade 3 is connected with the outer surface of the impeller shaft 1, and the main blade 3 is positioned on the end surface of the impeller disc 2 facing the water outlet 10 in the water pump; let the maximum height of the main blades 3 be H1, the minimum height be H2, and the distance between the surface of the main blades 3 facing the impeller disk 2 and the end surface of the impeller shaft 1 near the water outlet 10 be H, that is, the distance between the lower surface of the main blades 3 and the upper end surface of the impeller shaft 1 is H, and the diameter of the circumferential array of the main blades 3 is d, then the following conditions are satisfied: h1: h =1/5 to 1/3; h2: d =0.2 to 0.8.

Compared with the prior art, the utility model discloses a 1 up end of impeller shaft has the optical axis section that exceeds 2/3, has directly enlarged about 30% to 80% of discharge space of water pump delivery port 10, during the impeller rotation, changes and produces the centripetal force, makes the foreign matter gathering in aqueous near 1 impeller shaft to discharge through delivery port 10, have the effect of better emission foreign matter.

The diameter d of the main blade 3 influences the lift, the larger the diameter of the main blade 3 is, the higher the lift is, and conversely the lower the lift is. The minimum height h2 of the main blades 3 and the number of the main blades 3 influence the flow, and the larger the minimum height of the main blades 3 is, the larger the number is, the larger the flow is, otherwise, the smaller the flow is. Under the condition that the lift and the flow meet the performance requirements, the total area of the main blades 3 is required to be reduced as much as possible, the total area of the main blades 3 is related to the diameter of the main blades 3, the lowest height of the main blades 3 and the number of the blades, the ratio of the lowest height h2 of the main blades 3 to the diameter d of the main blades 3 ranges from 0.2 to 0.8, the optimal value is 0.25, when the ratio of the lowest height h2 of the main blades 3 to the diameter d of the main blades 3 is 0.25, the lowest height h2 of the main blades 3 is lower, the direct contact area of the impeller assembly 8 and liquid is reduced, the rotating resistance of the impeller assembly 8 is reduced, the rotating stability of the impeller assembly 8 is improved, and the noise generated by the rotation of the impeller assembly 8 is favorably reduced. Fig. 9 is a table showing the relationship between the minimum blade height and the noise, and it can be seen from fig. 9 that the reduction of the minimum blade height has a beneficial effect on reducing the noise generated by the impeller.

The inner end face of the main blade 3 is connected with the impeller shaft 1, the outer end face of the main blade 3 preferably extends outwards along the radial direction of the impeller shaft 1, so that the stress of the main blade 3 can be balanced, the outer end face of the main blade 3 can extend to the outer edge of the impeller disc 2, and in order to reduce the stress of the main blade 3, the diameter D of the impeller disc 2 is larger than the diameter D of the circumferential array of the main blade 3 in the embodiment, when the impeller assembly 8 rotates, fluid pressure is uniformly distributed on the impeller disc 2 and the main blade 3, the fluid pressure borne by the main blade 3 is effectively reduced, and the stress is uniform, so that the shaking of the impeller assembly 8 is reduced, and the noise caused by the shaking of the impeller assembly 8 is reduced. The impeller disc 2 is provided with pressure relief holes 11 which have a pressure relief function and are distributed at an angle of 45 degrees and are equidistant. The pressure relief holes 11 effectively reduce the fluid pressure experienced on the impeller disc 2.

The main blade 3 may be trapezoidal, curved or otherwise irregular in shape, as long as the above height requirements are met.

The number of main blades 3 may be 4 or 5 or 6 or 8 or 9 or 10, preferably 6. The blade quantity increases, under half water half gas condition, then has increased blade and equal probability of liquid area of contact and blade and gas area of contact, and the impeller rotates more steadily, and the noise is littleer. When the area of the blade is fixed, the number of the blades is increased by selecting six blades compared with four blades and five blades, the minimum height of the blades is reduced, and the diameter of the blades is larger. Under half water half gas condition, when the impeller rotated, the equal probability increase of blade and liquid area of contact and blade and gas area of contact, the impeller rotated more steadily, and the noise is littleer, and compares the blade number more than six blade numbers and saves more the material, and the cost of manufacture is lower.

The impeller shaft 1 and the motor shaft 4 are usually riveted and fixed, and in order to increase the fixed connection surface, the lower end surface of the impeller shaft 1 is provided with a mounting hole 5 for connecting the motor shaft 4 in the water pump. Both axial ends of the impeller shaft 1 can protrude out of the end surface of the impeller disc 2, and the impeller disc 2 is arranged at the lower end of the impeller shaft 1, namely the end where the mounting hole 5 is located.

Example two

On the basis of the first embodiment, a plurality of auxiliary blades 6 are arranged at one end of the impeller disc 2, which is back to the main blades 3, and the auxiliary blades 6 are arranged close to the outer edge of the impeller disc 2.

As shown in fig. 3 and 8, the back of the impeller disc 2 has 45 ° angularly equally spaced secondary blades 6. When the blades rotate, the stress direction from the center of the impeller assembly 8 to the edge of the blades is folded towards the center of the impeller assembly 8, so that when the impeller assembly 8 rotates at a high speed for drainage, the drainage deflection of the impeller assembly 8 around the central shaft is reduced, and the stress balance of each main blade 3 and each auxiliary blade 6 is not easy to cause the impeller assembly 8 to shake for drainage, thereby reducing the drainage noise. The size of the auxiliary blade 6 cannot be too large, so that excessive space of an impeller cavity is avoided, preferably, the outer end of the auxiliary blade 6 is attached to the outer edge of the impeller disc 2, and the radial length of the auxiliary blade 6 is 3-5 mm.

EXAMPLE III

The utility model discloses because centripetal force increases when impeller subassembly is rotatory, the drainage amount of deflection that impeller shaft 1 and motor shaft 4 received also increases, for reducing the influence of drainage amount of deflection to motor shaft 4, avoids motor shaft 4 and impeller shaft 1's the position of being connected to receive the shearing force fracture, and the embodiment is as follows further improvement on the basis of embodiment two: an annular retainer ring 101 is arranged on the periphery of the impeller shaft 1 positioned in the mounting hole 5, and the diameter of the annular retainer ring 101 is smaller than the inner diameter of a motor shell 9 in the water pump; and an axial end face of the annular retainer ring 101 projects beyond an axial end face of the secondary vane 6. The axial length of the annular retainer 101 can be increased at this time, and the motor shaft 4 located in the pump chamber can be completely protected.

Example four

A water pump comprises a water pump shell 7, a motor and the impeller assembly 8, wherein an impeller shaft 1 of the impeller assembly 8 is fixedly connected with a motor shaft 4 of the motor, and a water inlet and a water outlet 10 communicated with the impeller assembly 8 are formed in the water pump shell 7. The impeller assembly 8 is rotated by the motor shaft 4 so that liquid is drawn into the pump through the inlet and discharged through the outlet 10. The motor comprises a motor shell 9 fixedly connected with a water pump shell 7, an impeller cavity for accommodating an impeller component 8 is defined by the outer end faces of the water pump shell 7 and the motor shell 9, and preferably, as shown in fig. 5, 6 and 8, a groove 12 for accommodating the impeller disc 2 is arranged on the outer end face of the motor shell 9, the groove 12 is in clearance fit with the impeller disc 2, and the inner wall of the groove 12 is approximately parallel to the outer surface of the impeller disc 2. Although the impeller disk 2 is located inside the groove 12, if the gap between the groove 12 and the circumferential side surface of the impeller disk 2 is large, foreign matters may enter the inside of the motor through the gap, and for this reason, it is preferable that the difference between the diameter of the groove 12 and the diameter of the impeller disk 2 is 0.1mm to 0.15mm, reducing the possibility of foreign matters entering the inside of the motor.

EXAMPLE five

On the basis of the fourth embodiment, as shown in fig. 7, the motor further includes a stator assembly and a rotor assembly, and both axial ends of the rotor assembly are respectively rotatably connected with the motor casing 9 through an upper bearing 14 and a lower bearing 16. In the drainage process of the motor, the impeller assembly 8 may jump towards the axial direction of the impeller shaft 1, if the jumping amount is too large, the impeller disc 2 may axially move to the outside of the groove 2, that is, the end surface of the impeller disc 2 (or the end surface of the secondary blade 6) is located at the outside of the outer end surface of the motor housing 9, under the condition that the size of the motor housing 9 is not changed, the jumping amount of the impeller assembly 8 mainly includes a front jumping amount N and a rear jumping amount P of the rotor assembly, the front jumping amount N of the rotor assembly is the jumping amount of the injection molded body 13 of the rotating assembly towards the lower bearing 16, and the rear jumping amount P is the jumping amount of the injection molded body 13 of the rotating assembly towards the upper bearing 14, so that the total jumping amount of the impeller assembly 8 is the difference between the axial length L of the injection molded body 13 of the rotor assembly and the end surface distance M between the upper bearing 14 and the lower bearing 16, in this embodiment preferably M-L =0-1.8mm, even if the maximum jumping amount state, the end surface of the secondary blade 6 still stretches into the groove 12, and has an outer end surface distance of about 0.1-0.2mm from the motor housing 9. This structure has effectively reduced the clearance that 8 drunkenness of impeller subassembly produced, prevents that the foreign matter from getting into the rotor chamber, has effectively reduced the impeller noise.

In the description of the present invention, it is to be understood that the terms "center", "width", "thickness", "upper", "lower", "inner", "outer", "axial", "radial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.

Claims (10)

1. An impeller assembly, characterized by: the impeller comprises an impeller shaft (1), an impeller disc (2) fixed on the periphery of the impeller shaft (1) and a plurality of main blades (3) arranged on the periphery of the impeller shaft (1) in a circumferential array manner, wherein one end of each main blade (3) is connected with the outer surface of the impeller shaft (1), and the main blades (3) are positioned on the end surface, facing a water outlet (10) in a water pump, of the impeller disc (2);

the maximum height of the main blade (3) is H1, the minimum height of the main blade is H2, the distance from the surface of the main blade (3) facing the impeller disc (2) to the end face, close to the water outlet (10), of the impeller shaft (1) is H, and the diameter of the circumferential array of the main blade (3) is d, so that the following conditions are met: h1: h =1/5 to 1/3; h2: d =0.2 to 0.8.

2. The impeller assembly of claim 1, wherein: the main blades (3) extend outwards along the radial direction of the impeller shaft (1), and the diameter D of the impeller disc (2) is larger than the diameter D of the circumferential array of the main blades (3).

3. The impeller assembly of claim 1, wherein: a plurality of auxiliary blades (6) are arranged at one end of the impeller disc (2) back to the main blades (3), and the auxiliary blades (6) are arranged close to the outer edge of the impeller disc (2).

4. The impeller assembly of claim 3, wherein: the impeller disc (2) is positioned at one axial end of the impeller shaft (1), and one end of the impeller shaft (1) close to the impeller disc (2) is provided with a mounting hole (5) connected with a motor shaft (4) in the water pump.

5. The impeller assembly of claim 4, wherein: an annular retainer ring (101) is arranged on the periphery of the impeller shaft (1) positioned in the mounting hole (5), and the diameter of the annular retainer ring (101) is smaller than the inner diameter of a motor shell (9) in the water pump; and the axial end face of the annular retainer ring (101) protrudes out of the axial end face of the auxiliary blade (6).

6. The impeller assembly of claim 4, wherein: the outer ends of the auxiliary blades (6) are attached to the outer edge of the impeller disc (2), and the radial length of the auxiliary blades (6) is 3-5 mm.

7. The impeller assembly of claim 1, wherein: the number of the main blades (3) is 4 or 5 or 6 or 8 or 9 or 10.

8. A water pump, characterized in that: the impeller assembly (8) comprises a water pump shell (7), a motor and the impeller assembly (8) as claimed in any one of claims 1 to 7, wherein an impeller shaft (1) of the impeller assembly (8) is fixedly connected with a motor shaft (4) of the motor, and a water inlet and a water outlet (10) which are communicated with the impeller assembly (8) are arranged in the water pump shell (7).

9. The water pump of claim 8, wherein: the motor comprises a motor shell (9) fixedly connected with a water pump shell (7), an impeller cavity for accommodating an impeller component is formed by enclosing the outer end faces of the water pump shell (7) and the motor shell (9), a groove (12) for accommodating an impeller disc (2) is formed in the outer end face of the motor shell (9), and the diameter difference between the diameter of the groove (12) and the diameter of the impeller disc (2) is 0.1-0.15 mm.

10. The water pump of claim 9, wherein: the motor also comprises a stator assembly and a rotor assembly, wherein the two axial ends of the rotor assembly are respectively connected with the motor shell through an upper bearing (14) and a lower bearing (16), and the axial length L of an injection molding body (13) of the rotor assembly and the end surface distance M of the upper bearing (14) and the lower bearing (16) satisfy the following relations: M-L =0-1.8mm.

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