CN112970656B

CN112970656B - Hydraulic suspension impeller type aerator

Info

Publication number: CN112970656B
Application number: CN202110225618.8A
Authority: CN
Inventors: 杨性楷; 谢华; 李道芳; 杨天杰; 杨毅
Original assignee: Taizhou Yimin Electric Machinery Co ltd
Current assignee: Taizhou Yimin Electric Machinery Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-03-25
Anticipated expiration: 2041-03-01
Also published as: CN112970656A

Abstract

The impeller comprises a connecting disc and a wheel disc, the wheel disc comprises an inner wheel disc and an outer wheel disc, and the connecting disc, the inner wheel disc and the outer wheel disc are sequentially connected from inside to outside; a rotating shaft positioning hole is formed in the center of the connecting disc, and a group of bolt connecting holes are correspondingly formed in the periphery of the rotating shaft positioning hole of the connecting disc; a group of balance holes which are uniformly distributed along the circumference are arranged on the inner wheel disc, and the circumference is concentric with the inner wheel disc; a group of shovel-shaped blades are uniformly arranged on the edge of the outer wheel disc along the circumferential direction, and a group of axial force balance structures are uniformly arranged on the outer wheel disc along the circumferential direction; the axial force balance structure is composed of a long vertical plate, a short vertical plate and a balance rib which are correspondingly arranged on the lower side of the outer wheel disc. After the axial force balance structure is arranged on the outer wheel disc along the circumferential direction, the axial force caused by pressure difference and the axial force caused by dynamic counter force can be balanced, so that the aerator is more stable and reliable in operation.

Description

Hydraulic suspension impeller type aerator

Technical Field

The invention relates to the technical field of oxygenation equipment, in particular to a hydraulic suspension impeller type aerator.

Background

An aerator is a machine that is often used in the aquaculture industry. The main function of the device is to increase the oxygen content in water to ensure that the fish in the water can not lack oxygen, and simultaneously can inhibit the growth of anaerobic bacteria in the water, thereby preventing the deterioration of pond water from threatening the living environment of the fish. Oxygen increasing machines generally pump air into the water to increase the oxygen content of the water. The aerator is divided into an impeller aerator, a waterwheel aerator, a water-jet aerator, an inflatable aerator, a suction aerator and a vortex aerator, wherein the impeller aerator has the comprehensive functions of aeration, water stirring, gas explosion and the like, is the aerator which is most adopted at present, and has aeration capacity and power efficiency superior to other types. When the impeller type aerator works, the impeller can receive a downward axial force, and the axial force can lead the aerator floating on the water to sink as a whole, and brings the following problems:

1) the draft is increased when the aerator runs, the equipment load is increased, and the motor is easy to burn.

2) The safety factor of the motor must be increased for not burning the motor, so that a motor with larger power needs to be equipped, the equipment cost is high, and the running cost is large.

3) The aerator must adopt enlarged bearings or bearings capable of bearing axial force, resulting in complex equipment structure.

In order to balance the axial force, the impeller of the existing impeller type aerator is only provided with a hole at the central part of the impeller, so that the pressure on the working surface and the pressure on the two sides of the back surface of the impeller are consistent, and the aim of balancing the axial force is fulfilled. The impeller of the impeller type aerator usually adopts a shovel type blade (also called a water stirring plate), which is a high-flow low-lift impeller, and the axial force caused by the dynamic counter force generated by the change of the flow moving direction and the axial force caused by the pressure difference are in the same order of magnitude. The existing method for drilling the hole at the central part can only solve the axial force caused by pressure difference and cannot solve the axial force generated by the dynamic reaction force, so that the development of an impeller type aerator capable of balancing the axial force caused by the dynamic reaction force is needed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a hydraulic suspension type impeller aerator. When the hydraulic suspension impeller type aerator works, the axial force caused by pressure difference and the axial force caused by dynamic reaction force can be balanced by the structure of the impeller, so that the draft is smaller under the condition of the same working efficiency.

The technical scheme of the invention is as follows:

the impeller comprises a connecting disc and a wheel disc, the wheel disc comprises an inner wheel disc and an outer wheel disc, and the connecting disc, the inner wheel disc and the outer wheel disc are sequentially connected from inside to outside; a rotating shaft positioning hole is formed in the center of the connecting disc, and a group of bolt connecting holes are correspondingly formed in the periphery of the rotating shaft positioning hole of the connecting disc; a group of balance holes uniformly distributed along the circumference are formed in the inner wheel disc, and the circumference is concentric with the inner wheel disc; a group of shovel-shaped blades are uniformly arranged on the edge of the outer wheel disc along the circumferential direction, and a group of axial force balance structures are uniformly arranged on the outer wheel disc along the circumferential direction; the axial force balance structure comprises long riser, short riser and the balanced muscle of locating outer rim plate downside by the correspondence, short riser is located the place ahead of long riser, the upper and lower both ends of balanced muscle link to each other with the lower extreme of long riser, short riser respectively, be equipped with the limbers of both sides about the outer rim plate of intercommunication on the long riser.

Compared with the prior art, the hydraulic suspension impeller type aerator is provided with the impeller with a specific structure, the impeller is provided with the balance hole, the axial force caused by pressure difference can be balanced, meanwhile, the impeller is also provided with the specific axial force balance structure, the impeller can bear a force (hereinafter referred to as hydraulic force) vertical to the surface of the balance rib when rotating, the vertical component of the force is upward, the vertical downward dynamic counter force can be counteracted when the impeller rotates, the aim of dynamic balance is fulfilled, the draft of the aerator is smaller, the equipment load is small, the reliability is high, a motor with smaller power can be arranged, the cost is reduced, and meanwhile, a bearing which is enlarged or can bear the axial force is not needed, so that the equipment structure can be simplified, and the manufacturing cost can be controlled.

Preferably, in the hydrodynamic suspension impeller type aerator, an included angle θ between the balance rib and a rotating shaft of the impeller may be 45-60 °. When the included angle theta is smaller, the horizontal component of the hydraulic force borne by the balance rib is larger, so that the running resistance of the impeller is larger, and the vertical component of the hydraulic force borne by the balance rib is smaller, so that the axial force balance effect is poor; and when contained angle theta was great, although the hydraulic horizontal component that balanced muscle received was less, the vertical component was great, but this moment because the projection area of balanced muscle on long riser is less, and the hydraulic that balanced muscle received is less, is unfavorable for obtaining better balanced effect of axial force, and research shows that, when the contained angle theta of balanced muscle and impeller rotation axis was in 45 ~ 60 within ranges, the axial force that produces during operation of balanced oxygen-increasing machine that can be better. Further, the angle θ between the balance rib and the rotation axis of the impeller may preferably be 45 °.

Preferably, in the hydraulic suspension impeller type aerator, the upper surface of the shovel blade is an arc surface, the lower surface of the shovel blade is distributed with grids, and the bottom of each grid is provided with a water through slot hole. The grids are arranged on the lower surfaces of the shovel-shaped blades, so that the effect of enhancing the mechanical strength of the blades is achieved; and the bottom of the grid is provided with a water through slotted hole, so that the resistance of the impeller during operation can be reduced.

For optimization, in the hydrodynamic suspension impeller type aerator, the connecting disc and the inner wheel disc are respectively fixed with a reinforcing cylinder A and a reinforcing cylinder B; a group of reinforcing ribs A is arranged between the connecting disc and the reinforcing cylinder body A along the circumferential direction, and a group of reinforcing ribs B is arranged between the inner wheel disc and the reinforcing cylinder body B along the circumferential direction; the inner end of the axial force balance structure is connected with the reinforcing cylinder A. The arrangement of the reinforcing cylinder body and the reinforcing ribs enables the strength of the connecting disc and the wheel disc to be improved.

Preferably, in the hydrodynamic suspension impeller aerator, the impeller is injection molded from a polypropylene material. By adopting the material, the material cost of the impeller is lower while the strength of the impeller is ensured.

As an optimization, in the hydrodynamic suspension type impeller aerator, the number of the axial force balance structures is equal to the number of the shovel-type blades; in the circumferential direction, an axial force balance structure is arranged between two adjacent shovel-shaped blades. The quantity of axial force balanced structure and shovel type blade equals and sets up between shovel type blade for the mass distribution of impeller is more even, and is more steady during the rotation, and axial force balanced structure plays the effect of strengthening rib, makes impeller mechanical strength higher. Further, the number of the shovel-shaped blades is 6, 8 or 10.

Drawings

FIG. 1 is a top view of a hydrodynamic suspension impeller aerator according to the present invention;

FIG. 2 is a top view of the aerator impeller of the present invention;

FIG. 3 is a perspective view (looking down) of one perspective of the aerator impeller of the present invention;

FIG. 4 is a bottom view of the aerator impeller of the present invention;

FIG. 5 is a perspective view (from below) of one perspective of the aerator impeller of the present invention;

FIG. 6 is a cross-sectional view A-A of the impeller of the aerator of FIG. 2;

FIG. 7 is an enlarged view of the structure in the circle at B of FIG. 6;

FIG. 8 is a schematic view of the balance bar of FIG. 7 under stress;

FIG. 9 is an enlarged view of the structure within the circle at C in FIG. 4;

the labels in the figures are: 1-connecting disc, 101-rotating shaft positioning hole and 102-bolt connecting hole; 2-wheel disc, 201-inner wheel disc, 201A-balance hole, 202-outer wheel disc; 3-shovel type blades, 301-upper surface, 302A-grid and 302B-water through slotted holes; 4-axial force balance structure, 401-long vertical plate, 401A-water through hole, 402-short vertical plate and 403-balance rib; 5-reinforcing the cylinder A; 6-reinforcing the cylinder B; 7-reinforcing rib A; 8-reinforcing rib B; 9-a floating body; 10-a connecting frame; 11-motor.

Detailed Description

The invention is further described below with reference to the drawings and the detailed description, including examples, but not by way of limitation.

Referring to fig. 1 to 9, the hydrodynamic suspension type impeller aerator of the present invention also includes a motor 11, a connecting frame 10, a floating body 9, an impeller, and the like, as in the impeller aerator of the prior art. Different from the prior art, the method comprises the following steps: in the invention, the impeller comprises a connecting disc 1 and a wheel disc 2, wherein the wheel disc 2 comprises an inner wheel disc 201 and an outer wheel disc 202, and the connecting disc 1, the inner wheel disc 201 and the outer wheel disc 202 are sequentially connected from inside to outside; a rotating shaft positioning hole 101 is formed in the center of the connecting disc 1, and a group of bolt connecting holes 102 are correspondingly formed in the periphery of the rotating shaft positioning hole 101 of the connecting disc 1; a group of balance holes 201A uniformly distributed along the circumference are formed in the inner wheel disc 201, and the circumference is concentric with the inner wheel disc 201; a group of shovel-shaped blades 3 are uniformly arranged on the edge of the outer wheel disc 202 along the circumferential direction, and a group of axial force balance structures 4 are uniformly arranged on the outer wheel disc 202 along the circumferential direction; axial force balanced structure 4 comprises long riser 401, short riser 402 and balanced muscle 403 that the correspondence was located outer rim plate 202 downside, short riser 402 is located long riser 401's the place ahead, the upper and lower both ends of balanced muscle 403 link to each other with the lower extreme of long riser 401, short riser 402 respectively, be equipped with the limbers 401A of both sides about the outer rim plate 202 of intercommunication on the long riser 401.

When the aerator is used, the aerator is put into water, and the floating body 9 enables the aerator to float on the water surface. Because the impeller is provided with the axial force balance structure 4 with a specific structure, the balance rib 403 on the axial force balance structure 4 forms an included angle theta with the rotation axis of the impeller, as shown in fig. 8, when the impeller rotates, the balance rib 403 forms an included angle of 90 degrees to theta with the water flow direction, the impeller receives hydraulic force perpendicular to the surface of the balance rib 403 when rotating, the vertical component of the force is upward, the vertical downward dynamic reaction force when the impeller rotates can be counteracted, and the purpose of dynamic balance is achieved. On the other hand, the long vertical plate 401 of the axial force balance structure 4 is provided with a water through hole 401A, when the impeller runs, water on the upper side of the outer wheel disc 202 flows to the lower side of the outer wheel disc 202 from the water through hole 401A, and a certain axial force balance effect is also achieved, more importantly, after the axial force balance structure 4 passes through due to the liquid flow, the space behind the axial force balance structure 4 can be supplemented with liquid in time, so that the surface of the balance rib 403 of the next axial force balance structure 4 is not reduced by the hydraulic force, the balance effect of the axial force balance structure 4 is ensured, and the purpose of the invention is achieved.

As a specific embodiment of the present invention, see fig. 1-9:

in this embodiment, the included angle θ between the balance rib 403 and the rotation axis of the impeller is 45 °, and when the included angle θ is 45 °, the axial force generated during the operation of the aerator can be well balanced.

In this embodiment, the upper surface 301 of the shovel blade 3 is an arc surface, grids 302A are distributed on the lower surface 302 of the shovel blade 3, and a water through slot hole 302B is formed at the bottom of each grid 302A. The grid 302A is arranged on the lower surface 302 of the shovel-shaped blade 3, so that the mechanical strength of the blade is enhanced; and the bottom of the grid 302A is provided with a water through slot hole 302B, so that the resistance of the impeller during operation can be reduced.

In this embodiment, a reinforcing cylinder a5 and a reinforcing cylinder B6 are respectively fixed on the connecting disc 1 and the inner wheel disc 201, a set of reinforcing ribs a7 is circumferentially arranged between the connecting disc 1 and the reinforcing cylinder a5, and a set of reinforcing ribs B8 is circumferentially arranged between the inner wheel disc 201 and the reinforcing cylinder B6; the inner end of the axial force balancing structure 4 is connected to a reinforcing cylinder a 5. The arrangement of the reinforcing cylinder body and the reinforcing ribs enables the strength of the connecting disc 1 and the strength of the wheel disc 2 to be improved.

In this embodiment, the impeller is injection molded from a polypropylene material. By adopting the material, the material cost of the impeller can be reduced while the strength of the impeller is ensured.

In the present embodiment, the number of the axial force balance structures 4 is equal to the number of the shovel blades 3; in the circumferential direction, an axial force balance structure 4 is arranged between two adjacent shovel-type blades 3. Axial force balanced structure 4 with the quantity of shovel type blade 3 equals and sets up between shovel type blade 3 for the mass distribution of impeller is more even, and is more steady during the rotation, and axial force balanced structure plays the effect of strengthening rib, makes impeller mechanical strength higher. The number of the shovel-shaped blades 3 is 8.

The above general description of the invention and the description of the specific embodiments thereof, as referred to in this application, should not be construed as limiting the technical solutions of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the protection scope of the present application according to the disclosure of the present application without departing from the structural elements of the present invention.

Claims

1. The hydraulic suspension impeller type aerator comprises an impeller; the method is characterized in that: the impeller comprises a connecting disc (1) and a wheel disc (2), the wheel disc (2) comprises an inner wheel disc (201) and an outer wheel disc (202), and the connecting disc (1), the inner wheel disc (201) and the outer wheel disc (202) are sequentially connected from inside to outside; a rotating shaft positioning hole (101) is formed in the center of the connecting disc (1), and a group of bolt connecting holes (102) are correspondingly formed in the periphery of the rotating shaft positioning hole (101) of the connecting disc (1); a group of balance holes (201A) which are uniformly distributed along the circumference are formed in the inner wheel disc (201), and the circumference is concentric with the inner wheel disc (201); a group of shovel-shaped blades (3) are uniformly arranged on the edge of the outer wheel disc (202) along the circumferential direction, and a group of axial force balance structures (4) are uniformly arranged on the outer wheel disc (202) along the circumferential direction; axial force balanced structure (4) are located long riser (401), short riser (402) and balanced muscle (403) of outer rim plate (202) downside by the correspondence and are constituteed, short riser (402) are located the place ahead of long riser (401), the upper and lower both ends of balanced muscle (403) link to each other with the lower extreme of long riser (401), short riser (402) respectively, be equipped with limbers (401A) of both sides about intercommunication outer rim plate (202) on long riser (401).

2. The hydrodynamic suspension impeller aerator of claim 1 wherein: the included angle theta between the balance rib (403) and the rotating shaft of the impeller is 45-60 degrees.

3. The hydrodynamic suspension impeller aerator of claim 2 wherein: the included angle theta between the balance rib (403) and the rotating shaft of the impeller is 45 degrees.

4. The hydrodynamic suspension type impeller aerator of claim 1, 2 or 3, wherein: the shovel type blade (3) upper surface (301) are the arcwall face, it has grid (302A) to distribute on the lower surface (302) of shovel type blade (3), and the top of each grid (302A) all is equipped with one and leads to water slotted hole (302B).

5. The hydrodynamic suspension type impeller aerator of claim 1, 2 or 3, wherein: a reinforcing cylinder A (5) and a reinforcing cylinder B (6) are distributed on the lower sides of the outer edges of the connecting disc (1) and the inner disc (201); a group of reinforcing ribs A (7) are arranged between the connecting disc (1) and the reinforcing cylinder body A (5) along the circumferential direction, and a group of reinforcing ribs B (8) are arranged between the inner wheel disc (201) and the reinforcing cylinder body B (6) along the circumferential direction; the inner end of the axial force balance structure (4) is connected with the reinforcing cylinder A (5).

6. The hydrodynamic suspension type impeller aerator of claim 1, 2 or 3, wherein: the impeller is injection molded from a polypropylene material.

7. The hydrodynamic suspension type impeller aerator of claim 1, 2 or 3, wherein: the number of the axial force balance structures (4) is equal to that of the shovel-shaped blades (3); in the circumferential direction, an axial force balance structure (4) is arranged between two adjacent shovel-shaped blades (3).

8. The hydrodynamic suspension impeller aerator of claim 7 wherein: the number of the shovel-shaped blades (3) is 6, 8 or 10.