WO2022267239A1

WO2022267239A1 - Impeller pump

Info

Publication number: WO2022267239A1
Application number: PCT/CN2021/118458
Authority: WO
Inventors: 朱世军; 蔡卓; 许式省
Original assignee: 温岭正峰数字机电科技有限公司
Priority date: 2021-06-23
Filing date: 2021-09-15
Publication date: 2022-12-29

Abstract

An impeller pump, comprising a pump shaft (4), a flow guide base housing, a plurality of impellers (1) driven by the pump shaft (4) to rotate, and a flow guide body (5) connected to the flow guide base housing. The impellers (1) and the flow guide body (5) are all provided on the periphery of the pump shaft (4) in a sleeving mode; and each impeller (1) comprises an impeller main body (11) and an impeller base (13) matching the impeller main body (11) to form a liquid circulation chamber, the impeller main body (11) is provided with a mounting surface (111), a plurality of blades (12) are mounted on the mounting surface (111), the blades (12) are located in the circulation chamber, and the mounting surface (111) is a conical surface inclining towards a liquid outlet of the pump.

Description

an impeller pump

This application claims the priority of the Chinese patent application with the application number 202110702749.0 and the title of the invention "an impeller pump" submitted to the China Patent Office on June 23, 2021, and submitted to the China Patent Office on June 23, 2021, The priority of the Chinese patent application with the application number 202121407072.X and the application name "An Impeller Pump", the entire content of which is incorporated in this application by reference.

technical field

The present invention relates to the technical field of pumping equipment, and more specifically, relates to an impeller pump.

Background technique

The pump is a kind of mechanical equipment used to transport fluid or pressurize the fluid. The impeller pump is a kind of pump. When it works, the impeller drives the liquid to rotate at a high speed, and transmits mechanical energy to the liquid, so as to achieve the purpose of transporting the liquid.

In the process of using the existing impeller pump, the motor drives the impeller to rotate, the liquid enters from the liquid inlet, and flows out through the liquid outlet after rotating under the drive of the impeller. After the liquid enters from the liquid inlet, the impeller rotates During the process, part of the liquid cannot flow out of the liquid outlet according to the preset path, or the resistance encountered in the process of flowing from the liquid inlet to the liquid outlet is relatively large, resulting in a decrease in the efficiency and head of the pump.

To sum up, how to improve the efficiency and head of the pump is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide an impeller pump. During use, the pump shaft drives the impeller to rotate. During the process, the liquid will flow upward along the installation surface. Under the action of centrifugal force, an oblique upward thrust is applied to the liquid, which is beneficial to increase the kinetic energy of the liquid, so that more liquid enters the guide body, and the liquid entering the guide body will Enter the next impeller or flow out from the liquid outlet, thereby improving the efficiency and head of the pump.

In order to achieve the above object, the present invention provides the following technical solutions:

An impeller pump, comprising: a pump shaft, a deflector housing, several impellers rotated by the pump shaft, and a deflector connected to the deflector housing; the impeller and the deflector are both sleeved It is arranged on the outer periphery of the pump shaft, and a single guide body is arranged on the upper part of the corresponding impeller;

The impeller includes a main body of the impeller and an impeller seat that cooperates with the main body of the impeller to form a liquid circulation chamber, the main body of the impeller is provided with a mounting surface, and a plurality of blades are installed on the mounting surface, and the blades are located in the circulation chamber. The mounting surface is a tapered surface inclined toward the liquid outlet of the pump.

Preferably, the guide body includes a main body structure, a plurality of rudder blades and a guide track, the rudder vanes are arranged towards the outflow direction of the liquid in the impeller, and the guide track is arranged in the main structure away from the one side of the rudder blade;

The rudder blade is arranged along the circumferential direction of the main structure, and the length direction of the rudder blade extends both in the circumferential direction and the radial direction of the main structure, so that the liquid forms a swirl at the outlet of the rudder blade. flow.

Preferably, the inclination angle of the rudder blade is 55°-65°;

The inclination angle of the rudder blade is in a plane perpendicular to the central axis of the main structure, the line connecting the midpoint of the length direction of the rudder blade and the central axis of the main structure, and the The angle between the tangents at the midpoint along the length.

Preferably, the first outlet angle of the guide track is 42°-52°; the first outlet angle is the tangent line outside the end near the central axis of the main structure in the length direction of the guide track and this end The included angle between the radial directions of the main structure at the top position.

Preferably, the included angle between the installation surface and the central axis of the impeller body is 55°-75°.

Preferably, the included angle between the installation surface and the central axis of the impeller body is 70.4°.

Preferably, the impeller seat is welded to the impeller main body;

Or the impeller seat and the impeller main body are integrally structured.

Preferably, the blades are arranged along the circumferential direction of the installation surface, and the length direction of the blades extends both in the circumferential direction and the radial direction of the installation surface;

The wrapping angle of a single blade is 60°-80°; the wrapping angle is the angle formed by the two ends of the lengthwise direction of a single blade and the center line of the impeller main body respectively.

Preferably, the inlet angle of the blade is 10°-20°; the inlet angle is at the end position of the blade near the center of the installation surface, between the tangent line of the outer edge of the blade and the tangent line of the circumference of this position angle.

Preferably, the second outlet angle of the blade is 25°-35°; the second outlet angle is at the end position of the blade close to the edge of the installation surface, and the tangent line of the outer edge of the blade is the same as this The angle between the tangents of the position circle.

In the process of using the impeller pump provided by the present invention, the main body of the impeller cooperates with the impeller seat to form a liquid circulation chamber, the blades are located in the liquid circulation chamber, and the blades are installed on the mounting surface of the impeller main body, and the impeller is driven during the rotation of the pump shaft. Rotation, during the rotation of the impeller, after the liquid enters the liquid circulation chamber, the kinetic energy is transferred to the liquid when the impeller rotates, and under the action of centrifugal force, it will flow out along the mounting surface and the outlet of the blade to the edge. After the liquid flows out from the impeller, it enters the cavity formed by the corresponding guide body and the guide seat, and flows along the cavity formed by the guide body and the guide seat. After the cavity formed by the guide seat flows out, it enters the next impeller to continue to accelerate or flows out from the liquid outlet.

Compared with the prior art, the installation surface of the impeller pump in the present invention is a conical surface inclined toward the liquid outlet of the pump. Under the action of centrifugal force, the liquid flows out along the conical surface, and the centrifugal force acting on the liquid exists toward the outlet The component force in the direction of the liquid outlet has a pushing effect on the liquid towards the direction of the liquid outlet, which is beneficial to increase the kinetic energy of the liquid, so that the liquid flows to the liquid outlet more quickly and enters the guide body, so that the unit time enters the guide body and the guide body. The flow rate and velocity of the liquid in the cavity formed by the flow seat are increased, thereby improving the efficiency and head of the pump.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the schematic cross-sectional view of the local structure of the impeller pump provided by the present invention;

Fig. 2 is a schematic cross-sectional view of a specific embodiment of the impeller provided by the present invention;

Fig. 3 is the bottom view of the impeller in Fig. 2;

Figure 4 is a top view of the impeller in Figure 2;

Fig. 5 is a schematic structural view of the main body of the impeller provided by the present invention;

Fig. 6 is the schematic diagram of blade installation position;

FIG. 7 is a schematic structural view of a specific embodiment of the guide body provided by the present invention;

Fig. 8 is a schematic structural view of the diversion track of the diversion body in Fig. 7;

FIG. 9 is a schematic cross-sectional view along the direction A-A in FIG. 8 .

In Figure 1-9:

1 is the impeller, 11 is the main body of the impeller, 111 is the installation surface, 12 is the blade, 13 is the impeller seat, 21 is the upper cavity of the guide seat, 22 is the lower cavity of the guide seat, 31 is the friction plate, 32 is the stainless steel seal circle, 4 is the pump shaft, 5 is the guide body, 51 is the rudder blade, 52 is the main structure, 53 is the guide rail, a is the wrap angle, b is the inlet angle, f is the second outlet angle, β is the installation surface and The included angle of the central axis of the impeller body, P is the inclination angle of the rudder blade, γ is the first outlet angle of the guide track, h is the diameter of the inner ring where the rudder blade is located, and L is the diameter of the outer ring where the rudder blade is located.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The core of the present invention is to provide an impeller pump. During use, the pump shaft drives the impeller to rotate. The mounting surface on the main body of the impeller is a conical surface inclined Make the liquid flow out along the mounting surface, and under the action of centrifugal force, apply an oblique upward thrust to the liquid, which is beneficial to increase the kinetic energy of the liquid, so that more liquid enters the guide body, and the liquid entering the guide body will enter the next impeller Or flow out from the liquid outlet, thereby improving the efficiency and lift of the pump.

Please refer to Figure 1-9.

This specific embodiment discloses an impeller pump, which includes a pump shaft 4, a deflector housing, a number of impellers 1 driven by the pump shaft 4, and a deflector 5 connected to the deflector housing; the impeller 1 and the deflector 5 are sleeved on the outer periphery of the pump shaft 4, and a single deflector 5 is arranged on the upper part of the corresponding impeller 1; the impeller 1 includes an impeller main body 11 and an impeller seat 13 that cooperates with the impeller main body 11 to form a liquid circulation chamber, and the impeller main body 11 A mounting surface 111 is provided. Several blades 12 are installed on the mounting surface 111. The blades 12 are located in the flow chamber. The mounting surface 111 is a tapered surface inclined toward the liquid outlet of the pump.

As shown in Figure 1, a plurality of impellers 1 are provided, and each impeller 1 is provided with a one-to-one corresponding deflector 5. During use, the liquid first enters the impeller 1 close to the liquid inlet, and flows through the impeller 1 The kinetic energy is transferred to the liquid under the rotation. After the liquid is accelerated, it enters the next-stage impeller 1 through the corresponding guide body 5. After being accelerated again, it enters the next-stage impeller 1 through the corresponding guide body 5 or through the liquid outlet. The outflow is determined according to the actual situation.

In the process of using the impeller pump provided in this specific embodiment, the impeller body 11 cooperates with the impeller seat 13 to form a liquid circulation chamber, the blade 12 is located in the liquid circulation chamber, and the blade 12 is installed on the mounting surface 111 of the impeller body 11, The impeller 1 is driven to rotate during the rotation of the pump shaft 4. During the rotation of the impeller 1, after the liquid enters the liquid circulation chamber, the impeller 1 transmits kinetic energy to the liquid when it rotates. Under the action of centrifugal force, it will move along the installation surface 111 and The blades 12 flow out towards the outlet of the edge. After the liquid flows out from the impeller 1, it enters the cavity formed by the corresponding guide body 5 and the guide seat, and flows along the cavity formed by the guide body 5 and the guide seat. The guide body 5 and the guide seat shell are fixedly arranged, and the liquid After flowing out of the cavity formed by the guide body 5 and the guide seat, it enters the next impeller 1 to continue accelerating or flows out from the liquid outlet.

It should be noted that the number of blades 12 can be set to six as shown in FIG. 6 , or can be other values that meet the requirements, which are determined according to actual conditions.

The liquid outlet mentioned in this specific embodiment is the liquid outlet of the pump, and in the process of use, after the liquid is accelerated, it finally flows out from the liquid outlet.

In another specific embodiment, as shown in Figure 1, the impeller pump includes an upper cavity 21 of the flow guide seat, a guide body 5, an impeller 1, a lower cavity 22 of the flow guide seat and a pump shaft 4, and the upper cavity of the flow guide seat 21. The guide body 5, the impeller 1, and the lower cavity 22 of the guide seat are all sleeved on the outer periphery of the pump shaft 4, and a stainless steel sealing ring 32 is arranged between the upper cavity 21 of the guide seat and the lower cavity 22 of the guide seat ; The lower part of the impeller 1 is set on the friction plate 31 sleeved on the outer periphery of the pump shaft 4 . Of course, the impeller pump can also have other structural forms, which will not be repeated here.

Compared with the prior art, the mounting surface 111 of the impeller pump in this specific embodiment is a conical surface inclined toward the liquid outlet of the pump. Under the action of centrifugal force, the liquid flows out along the conical surface, and the centrifugal force acting on the liquid There is a component force toward the liquid outlet, which pushes the liquid toward the liquid outlet, which is beneficial to increase the kinetic energy of the liquid, so that the liquid flows to the liquid outlet more quickly and enters the guide body 5, so that the liquid enters the liquid outlet in a unit time. Both the flow rate and the flow velocity of the liquid in the cavity formed by the guide body 5 and the guide seat are increased, thereby improving the efficiency and head of the pump.

The lift mentioned in this specific embodiment is the pressure head of the pump, which refers to the energy obtained by the fluid per unit weight through the pump. The head of the pump depends on the structure of the pump, such as the size of the diameter of the impeller 1, the curvature of the blade 12, the speed of rotation, etc.; After the liquid flows through the chamber, since the installation surface 111 is a conical surface inclined toward the liquid outlet of the pump, compared with the installation method in the prior art where the installation surface 111 is a horizontal plane, the force of the centrifugal force acting on the liquid increases toward the outlet. The component force of the liquid port increases the energy obtained by the fluid per unit weight through the pump and increases the head of the pump.

The installation surface 111 mentioned in this specific embodiment is a tapered surface inclined towards the liquid outlet of the pump. The upper position of the impeller 1 in Fig. 2 .

On the basis of the above-mentioned embodiments, the guiding body 5 can be made to include a main body structure 52, a plurality of rudder blades 51 and a flow guiding track 53, the rudder vanes 51 are arranged towards the outflow direction of the liquid in the impeller 1, and the guiding track 53 is arranged on the main structure 52 is away from the side of the rudder blade 51; the rudder blade 51 is arranged along the circumferential direction of the main structure 52, and the length direction of the rudder blade 51 has an extension in the circumferential direction and the radial direction of the main structure 52, so that the liquid flows on the rudder blade 51 A swirl is formed at the outlet.

It should be noted that the length direction of the rudder blade 51 extends both in the circumferential direction and the radial direction of the main structure 52. It means that as shown in FIG. The length direction has a component in the radial direction of the main structure 52 and also has a component in the circumferential direction of the main structure 52 .

Preferably, the rudder blades 51 are evenly arranged along the circumferential direction of the main structure 52, and the number of the rudder blades 51 needs to be determined according to the actual situation, and details will not be described here.

In the process of using the impeller pump provided by this specific embodiment, when the impeller pump rotates, the impeller 1 drives the liquid to perform centrifugal motion, and the guide body 5 and the guide seat housing remain fixed. As shown in Figure 7, the bottom of the guide body 5 A rudder blade 51 is arranged on the side, and the centrifugal liquid flows out from the impeller 1, enters the rudder blade 51, flows along the rudder blade 51, then flows out from the outlet of the rudder blade 51, and forms a swirl at the outlet of the rudder blade 51. The liquid flowing out from the outlet of the rudder blade 51 enters the guide track 53 of the guide body 5 and flows along the guide track 53 , and the liquid flowing out from the guide track 53 enters the next impeller 1 .

Compared with the prior art, during the use of the impeller pump provided by this specific embodiment, the setting of the rudder blade 51 can make the liquid form a swirling flow at the outlet of the rudder blade 51, thereby increasing the single-stage pressure, thereby making more The liquid can enter the impeller 1, and the setting of the rudder blade 51 has a certain guiding effect on the liquid, thereby improving the efficiency and head of the pump.

On the basis of the foregoing embodiments, in order to further improve the effect of the swirling flow at the outlet of the rudder blade 51, the angle of inclination P of the rudder blade 51 can be 55°-65°; In the plane of the central axis of the rudder blade 51, the angle between the line connecting the midpoint of the length direction of the rudder blade 51 and the central axis of the main structure 52 and the tangent line at the midpoint of the length direction of the rudder blade 51; as shown in Figure 7 . In this specific embodiment, the tangent line at the midpoint of the length direction of the rudder blade 51 is the tangent line of the outer surface of the rudder blade 51 .

When the rudder blade 51 is a linear structure, the inclination angle P of the rudder blade 51 is the line connecting the midpoint of the longitudinal direction of the rudder blade 51 and the central axis of the main structure 52 in a plane perpendicular to the central axis of the main structure 52 , and the angle between the length direction of the rudder blade 51 .

Preferably, the inclination angle of the rudder blade 51 can be set to 61.3°, so as to further improve the swirling effect, so that more liquid can enter the next impeller 1 .

Preferably, as shown in Figure 7, h is the diameter of the inner ring where the rudder blade 51 is located, and L is the diameter of the outer ring where the rudder blade 51 is located. In a specific embodiment, the diameter h of the inner ring where the rudder blade 51 is located is 63.7mm. The diameter L of the outer ring where the rudder blade 51 is located is 75.1mm; of course, it can also be other set values, which will not be repeated here.

Based on the above embodiments, the guide track 53 can be arranged along the circumferential direction of the main structure 52 , and the length direction of the guide track 53 extends both in the circumferential direction and the radial direction of the main structure 52 .

It should be noted that the length direction of the guide track 53 extends both in the circumferential direction and the radial direction of the main structure 52, which means that as shown in FIG. The flow track 53 is a structure with a smooth transition curve; the length direction of the flow guide track 53 has a component in the radial direction of the main structure 52 and also has a component in the circumferential direction of the main structure 52 .

During use, the liquid at the outlet of the rudder blade 51 flows from the edge of the guide rail 53 along the guide rail 53 to a position where the guide rail 53 is close to the central axis of the main structure 52, which has a certain guiding effect on the liquid.

The first outlet angle γ of the guide rail 53 can be 42°-52°; the first outlet angle γ is the tangent line outside the end of the guide rail 53 in the length direction close to the central axis of the main structure 52 and the main structure at the end position. The included angle between the radial directions of 52.

Preferably, the first outlet angle can be set to 46.3°.

As shown in Figure 8, the thickness of the end of the guide rail 53 near the outer edge of the main body structure 52 in the length direction gradually decreases from the position away from the end to the position near the end. 53 The area of the inlet is increased, which is beneficial to the entry of liquid.

The end of the guide rail 53 in the length direction away from the central axis of the main structure 52 has a bend, and the bend is a smooth transition, and the specific bend angle needs to be determined according to the actual situation.

Based on the above embodiments, the included angle between the installation surface 111 and the central axis of the impeller main body 11 can be set to 55°-75°.

As shown in FIG. 2 , the included angle β between the installation surface 111 and the central axis of the impeller main body 11 can be 70.4°. Of course, the included angle β between the installation surface 111 and the central axis of the impeller body 11 can also be set to other appropriate angle values, which are specifically determined according to actual conditions.

On the basis of the above embodiments, a matching taper surface with the same angle as the top of the installation surface 111 can be provided on the impeller seat 13 , and the matching taper surface is opposite to the installation surface 111 to form a flow chamber.

The same angle as the top of the mounting surface 111 mentioned here means that the distance between the matching taper surface and any position between the mounting surface 111 is consistent, as shown in Figure 2, so that the liquid circulation chamber is inclined with the same height and dimension The chamber avoids the influence on the flow rate of the liquid due to the change of the cross section in the liquid circulation chamber during the flow of the liquid, and further improves the efficiency of the pump.

In the process of processing the impeller seat 13, the impeller seat 13 and the impeller main body 11 can be separately processed, and after the processing, the impeller seat 13 is welded to the impeller main body 11; the impeller seat 13 and the impeller main body 11 can also be integrated The formula structure is determined according to the actual situation, and will not be repeated here.

On the basis of the above embodiments, the blade 12 can be arranged along the circumferential direction of the installation surface 111, and the length direction of the blade 12 has extensions in both the circumferential direction and the radial direction of the installation surface 111;

The wrap angle a of a single blade 12 is 60°-80°; the wrap angle a is the angle formed by the two ends of the length direction of a single blade 12 and the center line of the impeller main body 11 respectively, as shown in Figure 6; the blade 12 The specific shape can be designed according to theoretical basis such as Bernoulli equation and Euler equation. The wrapping angle a in this specific embodiment is shown in Figure 6, in the same plane, connect the center of the installation surface 111 and one end of the length direction of the blade 12, connect the center of the installation surface 111 and the other end of the length direction of the blade 12, both The included angle between the connecting lines of the segments is the wrap angle a of the blade 12 .

Preferably, the blade 12 is a smooth curved structure, and as shown in 6 , the thickness of the blade 12 gradually becomes thicker from an end near the center of the installation surface 111 to an end near the edge of the installation surface 111 .

Preferably, the wrap angle a is 69.4°. Of course, the wrap angle a may also be other angle values that meet the requirements, which will not be repeated here.

The inlet angle b of the blade 12 is 10°-20°; the inlet angle b is the angle between the tangent line of the outer edge of the blade 12 and the tangent line of the circumference at the end position of the blade 12 close to the center of the installation surface 111 . As shown in Figure 6, the end of the blade 12 close to the center of the mounting surface 111 is arranged along the same circumference. At the end position of the blade 12 close to the center of the mounting surface 111, the angle between the tangent of the outer edge of the blade 12 and the tangent of the circumference of this position is That is the entrance angle b.

Preferably, the entrance angle b is 14.9°. Of course, the entrance angle b can also be other angle values that meet the requirements, which will not be repeated here.

The second outlet angle f of the blade 12 is 25°-35°; the second outlet angle f is the distance between the tangent line of the outer edge of the blade 12 and the tangent line of the circumference of this position at the end position of the blade 12 near the edge of the mounting surface 111 Angle; as shown in Figure 6, the end of the blade 12 near the edge of the mounting surface 111 is arranged along the same circumference, at the end position of the blade 12 near the edge of the mounting surface 111, the distance between the tangent line of the outer edge of the blade 12 and the tangent line of this position The included angle is the second outlet angle f.

Preferably, the second outlet angle f is 30.2°. Of course, the second outlet angle f can also be other angle values that meet the requirements, which will not be repeated here.

It should be noted that the impeller is mounted on the pump shaft 4 through double bearings, and one of the bearings is located on the upper part of the friction plate 31. The guide body 5 is provided with a groove for supporting the bearing. The depth of the groove is 3mm-10mm, preferably , the depth of the groove is 5mm; the other bearing is located at the stainless steel sealing ring 32, the double bearing setting method can improve the stability of the impeller during rotation and prevent the impeller from being unstable under high-speed rotation.

Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. Any combination of all the embodiments provided by the present invention is within the protection scope of the present invention, and will not be repeated here.

The impeller pump provided by the present invention has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

An impeller pump, characterized in that it comprises: a pump shaft (4), a deflector housing, several impellers (1) driven and rotated by the pump shaft (4), and a pump connected to the deflector housing Guide body (5); the impeller (1) and the guide body (5) are both sleeved on the outer periphery of the pump shaft (4), and a single guide body (5) is arranged on the corresponding impeller the upper part of (1);

The impeller (1) includes an impeller main body (11) and an impeller seat (13) that cooperates with the impeller main body (11) to form a liquid circulation chamber, and the impeller main body (11) is provided with a mounting surface (111), so Several blades (12) are installed on the installation surface (111), the blades (12) are located in the flow chamber, and the installation surface (111) is a conical surface inclined toward the liquid outlet of the pump.
The impeller pump according to claim 1, characterized in that, the guide body (5) comprises a main body structure (52), a plurality of rudder blades (51) and a guide rail (53), and the rudder blades (51) Set towards the outflow direction of the liquid in the impeller (1), the guide track (53) is set on the side of the main structure (52) away from the rudder blade (51);

The rudder blade (51) is arranged along the circumferential direction of the main structure (52), and the length direction of the rudder blade (51) has an extension both in the circumferential direction and the radial direction of the main structure (52), so as to The liquid is formed into a swirl flow at the outlet of the rudder blade (51).
The impeller pump according to claim 2, characterized in that, the inclination angle (P) of the rudder blade (51) is 55°-65°;

The inclination angle (P) of the rudder blade (51) is that in a plane perpendicular to the central axis of the main structure (52), the midpoint of the longitudinal direction of the rudder blade (51) and the main structure ( 52), the angle between the line connecting the central axes of the rudder blade (51) and the tangent line at the midpoint of the length direction of the rudder blade (51).
The impeller pump according to claim 2, characterized in that, the first outlet angle (γ) of the guide track (53) is 42°-52°; the first outlet angle (γ) is the guide The included angle between the tangent outside the end near the central axis of the main structure (52) in the length direction of the flow track (53) and the radial direction of the main structure (52) at this end.
The impeller pump according to any one of claims 1-4, characterized in that, the included angle (β) between the mounting surface (111) and the central axis of the impeller main body (11) is 55°-75°.
The impeller pump according to claim 5, characterized in that, the included angle (β) between the installation surface (111) and the central axis of the impeller main body (11) is 70.4°.
The impeller pump according to claim 5, characterized in that, the impeller seat (13) is welded to the impeller main body (11);

Or the impeller seat (13) and the impeller main body (11) are integrally structured.
The impeller pump according to claim 5, characterized in that, the blades (12) are arranged along the circumferential direction of the installation surface (111), and the length direction of the blades (12) is on the installation surface (111). ) has both circumferential and radial extension;

The wrap angle (a) of a single blade (12) is 60°-80°; The angle formed by the lines connecting the centers.
The impeller pump according to claim 8, characterized in that, the inlet angle (b) of the blade (12) is 10°-20°; the inlet angle (b) is when the blade (12) is close to the The end position of the center of the mounting surface (111), the angle between the outer edge tangent of the blade (12) and the circumferential tangent of this position.
The impeller pump according to claim 9, characterized in that, the second outlet angle (f) of the blade (12) is 25°-35°; the second outlet angle (f) is at the blade ( 12) At the end position close to the edge of the mounting surface (111), the included angle between the tangent line of the outer edge of the blade (12) and the circumferential tangent line at this position.