CN211116778U

CN211116778U - Large-flow water pump impeller

Info

Publication number: CN211116778U
Application number: CN201921752805.6U
Authority: CN
Inventors: 杨拥军
Original assignee: Ashland Water Pump Wuxi Co ltd
Current assignee: Ashland Water Pump Wuxi Co ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-07-28
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a large-traffic water pump impeller, concretely relates to water pump unit spare technical field, including the impeller dish, first impeller blade, second impeller blade are installed to the periphery on impeller dish surface, and first impeller blade, second impeller blade are connected, and the impeller axle sleeve is installed at the center of impeller dish, and the through-hole has been seted up at the center of impeller axle sleeve, and the through-hole internal friction of impeller axle sleeve is connected with the tight overcoat that expands, and the internal friction of the tight overcoat that expands is connected with the tight endotheca that expands, expands and tightly endotheca, expand and be provided with the interior hexagonal screw of looks adaptation in the tight overcoat screw. The utility model discloses an improve the shaft hole structure, utilize the even axle mode of the tight cover that expands with impeller and water pump axle head zonulae occludens, long service life, intensity is high, and the cover that expands relies on the friction drive, does not have the keyway to being weakened by the connecting piece, also does not have relative motion, can not produce wearing and tearing in the work, has thoroughly avoided the navigation key drunkenness of impeller, lock nut or not hard up problem, improves the life of this impeller greatly.

Description

Large-flow water pump impeller

Technical Field

The utility model relates to a water pump unit technical field, more specifically says, the utility model specifically is a large-traffic water pump impeller.

Background

Conventional water pump impeller includes shaft hole, wheel hub and connects the blade on wheel hub, the blade is the smooth curved surface of certain radian, and smooth cambered surface blade can reduce the resistance to rivers at the in-process that rivers flow, but under the prerequisite of same circumference radius and same rotational speed, the flow and the lift of cambered surface formula impeller are all on the small side, can not satisfy high lift and large-traffic requirement.

In order to solve the above-mentioned problem, a large-traffic water pump impeller is disclosed in patent application publication No. CN201351634Y, refer to specification figure 5, through the structure that has adopted pitch arc part and straight line portion to constitute in this application, its straight line portion is under the prerequisite of same circumference radius and same rotational speed, possess than the blade of full pitch arc structure to the bigger thrust of water, can improve the flow and the lift index of water pump effectively, use the utility model discloses can be on the basis of same impeller size, provide the water pump of more large-traffic and lift.

However, the technical scheme still has more defects in actual application;

firstly, because the water pump impeller still adopts the traditional shaft hole structure to drive the high-flow water pump impeller, in the practical use, the nut of the water pump impeller is frequently or long-time loosened, so that the impeller is loosened and eccentric wear is caused, and the problems of the play of a positioning key of the impeller, the falling or loosening of a locking nut, the expansion of the gap between the impeller and a pump shell and the like are caused, so that the water pump impeller is easy to damage and the service life is reduced;

secondly, because the technical performance of the traditional pump is that the flow rate is in inverse proportion to the lift, namely the lift is small when the flow rate is large or the flow rate is small when the lift is high, although the lift of the water pump can be properly improved by increasing the number of blades in the water pump impeller under the condition of improving the liquid flow, the increase of the number of blades causes the inlet speed of the impeller to increase due to the large flow, so that the pressure drop from the inlet of the pump to the impeller and in an inlet pipeline is increased, the cavitation limit is exceeded, and serious cavitation is generated.

Therefore, it is highly desirable to provide a high-flow water pump impeller with long service life and good cavitation erosion resistance.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the embodiment of the utility model provides a large-flow water pump impeller, through improving the shaft hole structure, utilize the fixed connecting shaft mode of the tight cover that expands to closely connect fixedly impeller and water pump shaft end, long service life, intensity is high, the cover that expands relies on the friction drive, does not have the keyway to weaken to the piece of being connected, also does not have relative motion, can not produce wearing and tearing in the work, has thoroughly avoided the problem that the navigation key drunkenness of impeller, lock nut drop or become flexible, improve the life of this impeller greatly; additionally, the utility model discloses a series of anti cavitation erosion measures suitably increase blade import width, widen the area of overflowing that can increase blade import department, reduce the axial plane speed and increased the leeway towards axial development for the development process of cavitation bubble to delayed the development process of cavitation bubble towards the export, increased blade import width and can prolong the cavitation latency, improved anti cavitation erosion performance, in order to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a large-traffic water pump impeller, includes the impeller dish, the peripheral fixed mounting on impeller dish surface has first impeller blade, second impeller blade, first impeller blade, second impeller blade fixed connection, the center fixed mounting of impeller dish has the impeller axle sleeve, the through-hole has been seted up at the center of impeller axle sleeve, the through-hole internal friction of impeller axle sleeve is connected with the tight overcoat that expands, the internal friction of the tight overcoat that expands is connected with the tight endotheca that expands, the screw has been seted up on the surface of the tight endotheca that expands, the tight overcoat screw that expands, be provided with the interior hexagonal screw of looks adaptation in the tight endotheca that expands, the tight overcoat screw that expands.

In a preferred embodiment, the number of the first impeller blade and the second impeller blade is two, and the other end of the first impeller blade is fixedly connected with the edge of the impeller shaft sleeve.

In a preferred embodiment, the edges of the inner expanding sleeve and the outer expanding sleeve are provided with notches, and the inner expanding sleeve and the outer expanding sleeve are low-carbon steel members.

In a preferred embodiment, the length of the second impeller blades is greater than the length of the first impeller blades, the first impeller blades have an arc-shaped configuration, and the second impeller blades have a linear configuration.

In a preferred embodiment, the second impeller blades have a width that gradually decreases in the axial direction of the impeller disk, and the end width of the second impeller blades in the axial direction of the impeller disk is the same as the width of the first impeller blades.

In a preferred embodiment, the bottom surface of the impeller disk is provided with reinforcing ribs which scatter outwards from the shaft hole, and annular reinforcing ribs are arranged between the edge of the impeller shaft sleeve and the second impeller blade.

In a preferred embodiment, the edge of the impeller disc is in a truncated cone shape, the height of the second impeller blade gradually increases outwards along the axial direction of the impeller disc, and the impeller disc, the first impeller blade, the second impeller blade and the impeller shaft sleeve are of an integrally formed structure.

The utility model discloses a technological effect and advantage:

1. the utility model has the advantages that the shaft hole structure is improved, the impeller and the water pump shaft end are tightly connected and fixed by utilizing the connecting shaft mode of fixing the expansion sleeve, the service life is long, the strength is high, the expansion sleeve is driven by friction, the connected piece is not weakened by a key groove, and does not have relative motion, no abrasion is generated in the work, the problems of the play of a positioning key of the impeller and the falling or loosening of a locking nut are thoroughly avoided, and the service life of the impeller is greatly prolonged;

2. the utility model discloses a series of anti cavitation erosion measures suitably increase blade import width, widen the flow area that can increase blade import department, reduce the axial plane speed and increased the leeway towards axial development for the development process of cavitation bubble to delayed the development process of cavitation bubble towards the export, increased blade import width and can prolong the cavitation incubation period, improved anti cavitation erosion performance.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a sectional view of the overall structure of the present invention.

Fig. 3 is the structural schematic diagram of the expansion sleeve of the utility model.

Fig. 4 is a schematic structural view of an impeller blade according to the present invention.

Fig. 5 is a schematic diagram of a comparison file structure of the present invention.

The reference signs are: 1. an impeller disc; 2. a first impeller blade; 3. a second impeller blade; 4. an impeller shaft sleeve; 5. expanding the inner sleeve; 6. expanding the outer sleeve; 7. and a socket head cap screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The large-flow water pump impeller shown in the attached drawings 1-4 comprises an impeller disc 1, wherein a first impeller blade 2 and a second impeller blade 3 are fixedly installed on the periphery of the surface of the impeller disc 1, the first impeller blade 2 and the second impeller blade 3 are fixedly connected, an impeller shaft sleeve 4 is fixedly installed at the center of the impeller disc 1, a through hole is formed in the center of the impeller shaft sleeve 4, an expansion outer sleeve 6 is connected to the through hole of the impeller shaft sleeve 4 in a friction mode, an expansion inner sleeve 5 is connected to the inner portion of the expansion outer sleeve 6 in a friction mode, screw holes are formed in the surfaces of the expansion inner sleeve 5 and the expansion outer sleeve 6, and inner hexagon screws 7 which are matched with each other are arranged in the screw holes of the expansion inner sleeve.

The implementation mode is specifically as follows: the impeller and the water pump shaft end are tightly connected and fixed by improving the shaft hole structure and utilizing the shaft connecting mode of fixing the expansion sleeve, so that the impeller has long service life and high strength, the expansion sleeve is driven by friction, the connected piece is not weakened by a key groove and does not move relatively, no abrasion is generated in the work, the problems of play of a positioning key of the impeller and falling or loosening of a locking nut are thoroughly avoided, and the service life of the impeller is greatly prolonged; additionally, the utility model discloses a series of anti cavitation erosion measures adopt to widen the flow area that can increase blade import department, reduce the axial plane speed and increased the leeway towards axial development for the development process of cavitation bubble to delayed the development process of cavitation bubble towards the export, increased the blade import width and can prolong the cavitation incubation period, improved anti cavitation erosion performance.

The number of the first impeller blades 2 and the second impeller blades 3 is 9, the other end of the first impeller blades 2 is fixedly connected with the edge of the impeller shaft sleeve 4, and the preferred 9 impeller blades can increase the water stirring force and efficiency, so that the water pump has the performance of high lift, high flow and efficiency of more than 80%.

The edges of the expansion inner sleeve 5 and the expansion outer sleeve 6 are provided with notches, the expansion inner sleeve 5 and the expansion outer sleeve 6 are low-carbon steel members, the impeller and the water pump shaft end are tightly connected and fixed in a shaft connecting mode of fixing the expansion sleeve, the service life is long, the strength is high, the expansion sleeve is driven by friction, no key groove is weakened on a connected piece, no relative movement exists, and abrasion cannot be generated in work.

Wherein, the length of second impeller piece 3 is greater than the length of first impeller piece 2, and first impeller piece 2 is the arc structure, and second impeller piece 3 is the linear type structure, has adopted the structure that pitch arc part and linear part are constituteed, and its linear part possess than the blade of full pitch arc structure to the bigger driving force of water under the prerequisite of the same circumference radius and the same rotational speed, can improve the flow and the lift index of water pump effectively.

Wherein, its width of second impeller piece 3 along the axial direction of impeller dish 1 diminishes gradually, second impeller piece 3 is the same with 2 widths of first impeller pieces along the axial direction end width of impeller dish 1, increase impeller import effective area, can improve the cavitation erosion resistance of pump, but not the big better, it is too big simultaneously still will make sealing ring department clearance area increase, thereby make the leakage loss increase, the volumetric efficiency reduces, through the outside one end width of the axial direction of the statistics second impeller piece 3 of relapseing 1.15 ~ 1.25 times of the inside one end width of edge axial direction.

Wherein, the bottom surface of the impeller disc 1 is provided with a reinforcing rib which scatters outwards from the shaft hole, an annular reinforcing rib is arranged between the edge of the impeller shaft sleeve 4 and the second impeller blade 3, and the reinforcing rib can play a certain turbulence role, resist a part of water erosion and enhance the cavitation erosion resistance of the impeller.

Wherein, 1 edge of impeller dish is the round platform type, and the outside grow gradually of the axial direction of impeller dish 1 is followed to the height of second impeller piece 3, and impeller dish 1, first impeller piece 2, second impeller piece 3, impeller axle sleeve 4 are integrated into one piece structure for it is stronger to connect inseparabler structure between impeller dish 1, first impeller piece 2, second impeller piece 3, the impeller axle sleeve 4, is fit for large-traffic water pump work.

The utility model discloses the theory of operation:

firstly, an impeller disc 1, an expansion inner sleeve 5 and an expansion outer sleeve 6 with proper sizes are selected according to the power of a water pump and the diameter of a rotating shaft, the impeller disc 1, the expansion inner sleeve 5 and the expansion outer sleeve 6 are sleeved at the shaft end of the water pump, the expansion inner sleeve 5 is connected into the expansion outer sleeve 6 through an inner hexagon screw 7, and the expansion outer sleeve 6 is expanded through inward extrusion of the expansion inner sleeve 5 so that the impeller disc 1 and the shaft end of the water pump are firmly fixed.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a large-traffic water pump impeller, includes impeller dish (1), its characterized in that: the impeller disc is characterized in that a first impeller blade (2) and a second impeller blade (3) are fixedly mounted on the periphery of the surface of the impeller disc (1), the first impeller blade (2) and the second impeller blade (3) are fixedly connected, an impeller shaft sleeve (4) is fixedly mounted at the center of the impeller disc (1), a through hole is formed in the center of the impeller shaft sleeve (4), an expansion outer sleeve (6) is connected to the through hole of the impeller shaft sleeve (4) in a friction mode, an expansion inner sleeve (5) is connected to the inner friction of the expansion outer sleeve (6) in an expansion mode, screw holes are formed in the surfaces of the expansion inner sleeve (5) and the expansion outer sleeve (6), and inner hexagonal screws (7) matched with each other are arranged in the screw holes of the expansion inner sleeve (5) and the expansion.

2. A high flow water pump impeller according to claim 1, characterized in that: the number of the first impeller blades (2) and the second impeller blades (3) is 9, and the other ends of the first impeller blades (2) are fixedly connected with the edge of the impeller shaft sleeve (4).

3. A high flow water pump impeller according to claim 1, characterized in that: the edge of the expansion inner sleeve (5) and the expansion outer sleeve (6) is provided with a gap, and the expansion inner sleeve (5) and the expansion outer sleeve (6) are low-carbon steel components.

4. A high flow water pump impeller according to claim 1, characterized in that: the length of the second impeller blade (3) is greater than that of the first impeller blade (2), the first impeller blade (2) is of an arc structure, and the second impeller blade (3) is of a linear structure.

5. A high flow water pump impeller according to claim 1, characterized in that: the width of the second impeller blade (3) is gradually reduced along the axial direction of the impeller disc (1), and the width of the end of the second impeller blade (3) along the axial direction of the impeller disc (1) is the same as that of the first impeller blade (2).

6. A high flow water pump impeller according to claim 1, characterized in that: the bottom surface of the impeller disc (1) is provided with reinforcing ribs which scatter outwards from the shaft hole, and annular reinforcing ribs are arranged between the edge of the impeller shaft sleeve (4) and the second impeller blades (3).

7. A high flow water pump impeller according to claim 1, characterized in that: the impeller disc (1) edge is the round platform type, the height of second impeller piece (3) outwards grows gradually along the axial direction of impeller disc (1), first impeller piece (2), second impeller piece (3), impeller axle sleeve (4) are the integrated into one piece structure.