Low-resistance and high-flow volute and turbomachinery thereof

Abstract

The invention belongs to the technical field of impeller machinery, and particularly relates to a low-resistance and high-flow volute and an impeller machine.The low-resistance and high-flow volute comprises a volute body, an impeller machinery water inlet is coaxially formed in one end of the volute body, an impeller machinery water outlet is fixedly connected to the outer edge of the volute body, and the impeller machinery water outlet communicates with the volute body through a water drainage structure; the drainage structure comprises a second drainage channel, the second drainage channel communicates with an inner cavity of the volute body through the inner wall drainage opening, a flow guide wall is arranged on the inner side wall of the volute body, one end of the flow guide wall communicates with the inner wall drainage opening, the second drainage channel communicates with a first drainage channel, and the first drainage channel is formed in the impeller mechanical drainage opening. The flow stability of the flow channel can be effectively improved, the drainage efficiency of the turbomachinery can be improved, and meanwhile noise cannot be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of impeller machinery, and in particular relates to a low-resistance, high-flow volute and an impeller machinery thereof. Background Art

[0002] Impeller machinery is a device used to discharge liquid from a stagnant pool or a large liquid storage tank. As a general-purpose machine, impeller machinery is widely used in all walks of life.

[0003] As a commonly used household appliance, air conditioners also have impeller machinery inside. The function of the impeller machinery is to discharge the condensed water produced by the evaporator in the air conditioner to the outside. The impeller machinery is the core component of air conditioning drainage, and its performance has a direct impact on the performance of the entire machine.

[0004] The impeller machinery used for air conditioning drainage in the prior art usually has problems such as uneven flow at the impeller machinery outlet, insufficient flow rate and head during the drainage process. Increasing the head and flow rate of the impeller machinery will increase the noise of the impeller machinery, affecting the consumer experience. Summary of the invention

[0005] The object of the present invention is to provide a low-resistance, high-flow volute and its impeller machinery to solve the above problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A low-resistance, high-flow volute, comprising: a volute body, one end of which is coaxially provided with an impeller mechanical water inlet, an outer edge of which is fixedly connected with an impeller mechanical drain port, and the impeller mechanical drain port is connected to the volute body through a drain structure;

[0008] The drainage structure includes a second drainage channel, which is connected to the inner cavity of the volute body through an inner wall drainage port. A guide wall is provided on the inner wall of the volute body, and one end of the guide wall is connected to the inner wall drainage port. The second drainage channel is connected to the first drainage channel, and the first drainage channel is provided in the impeller machinery drainage port.

[0009] Preferably, the side of the second drainage channel close to the volute body is the outer side, and the calculation formula of the outer cross-sectional diameter of the second drainage channel is:

[0010] D3 = (|D2-D1|)*A;

[0011] Wherein, D3 is the outer cross-sectional diameter of the second drainage channel, D2 is the diameter of the water inlet of the impeller machinery, D1 is the diameter of the drainage outlet of the impeller machinery, and A is a positive number.

[0012] Preferably, the outer cross section and the inner cross section of the second drainage channel are connected by a second-order Bezier curve, and the function form of the second-order Bezier curve is as follows:

[0013]

[0014] Where n is the order of the Bezier curve, P i (i=0,1,2,...,n) is its n+1 control point, b i，n (t) is the Bernstein polynomial, and its mathematical expression is as follows:

[0015]

[0016] Preferably, the inner wall drain port is an arc surface opened on the inner side wall of the volute body, and the radius calculation formula of the arc surface is:

[0017] R1=R2-L4;

[0018] Among them, R1 is the radius of the arc surface, R2 is the inner cavity radius of the volute body, and L4 is the distance between the center of the arc surface and the center of the inner cavity of the volute body.

[0019] Preferably, the guide wall is opened on the arc surface.

[0020] An impeller machine is applied with the low-resistance, high-flow volute, comprising: a motor front cover clamped with the volute body, a motor base fixedly installed on the side of the motor front cover away from the volute body, an impeller motor fixedly installed between the motor base and the motor front cover, the motor shaft of the impeller motor extends into the volute body, an impeller is coaxially arranged in the volute body, an impeller motor shaft hole is coaxially opened on the impeller, and the motor shaft is coaxially fixed in the impeller motor shaft hole.

[0021] Preferably, a sealing base is circumferentially provided at the connection between the volute body and the motor front cover, and the sealing base is opened on the volute body.

[0022] Preferably, a plurality of volute buckles are fixedly connected to one side of the volute body at equal intervals in the circumferential direction, and the volute body is buckled onto the motor front cover through the volute buckles.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] When the present invention is in use, the impeller motor drives the impeller to rotate through the motor shaft, and water is sucked into the inner cavity (pump chamber) of the volute body through the impeller machinery water inlet, obtains centrifugal force through the rotating blades on the impeller, and flows out to the impeller machinery drain port. The inner wall drain port and the guide wall allow water to easily and smoothly flow into the impeller machinery drain port, which can effectively improve the flow stability of the flow channel and improve the drainage efficiency of the impeller machinery without increasing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0026] Figure 1 It is a front view of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the volute body in the present invention;

[0029] Figure 4 is a cross-sectional view of the volute body of the present invention;

[0030] Figure 5 is a schematic structural diagram of the second drainage channel in the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the inner wall drain port in the present invention;

[0032] Figure 7 It is a structural schematic diagram of the guide wall in the present invention;

[0033] Figure 8 A flow rate comparison diagram of the impeller machinery of the present invention and the existing impeller machinery at different heads;

[0034] Among them, 1. Motor base; 2. Impeller motor; 3. Motor front cover; 4. Volute body; 5. Impeller; 6. Sealed cabin; 7. Motor shaft; 8. Impeller motor shaft hole; 9. Impeller mechanical drain port; 10. Impeller mechanical water inlet; 11. Inner wall drain port; 12. Guide wall; 13. Volute buckle; 14. Sealed base; 15. First drain channel; 16. Second drain channel. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1 to 7 The present invention discloses a low-resistance, high-flow volute, comprising: a volute body 4, one end of which is coaxially provided with an impeller mechanical water inlet 10, an outer edge of which is fixedly connected with an impeller mechanical drain port 9, and the impeller mechanical drain port 9 is connected to the volute body 4 through a drain structure;

[0038] The drainage structure includes a second drainage channel 16, which is connected to the inner cavity of the volute body 4 through the inner wall drainage port 11. A guide wall 12 is provided on the inner wall of the volute body 4, and one end of the guide wall 12 is connected to the inner wall drainage port 11. The second drainage channel 16 is connected to the first drainage channel 15, and the first drainage channel 15 is provided in the impeller machinery drainage port 9.

[0039] Further optimization scheme, the side of the second drainage channel 16 close to the volute body 4 is the outer side, and the calculation formula of the outer cross-sectional diameter of the second drainage channel 16 is:

[0040] D3 = (|D2-D1|)*A;

[0041] Wherein, D3 is the outer cross-sectional diameter of the second drainage channel 16, D2 is the diameter of the impeller machinery water inlet 10, D1 is the diameter of the impeller machinery drainage port 9, and A is a positive number.

[0042] According to a further optimization scheme, the outer cross section and the inner cross section of the second drainage channel 16 are connected by a second-order Bezier curve, and the function form of the second-order Bezier curve is as follows:

[0043]

[0044] Where n is the order of the Bezier curve, P i i=0,1,2,...,n are its n+1 control points, b i，n (t) is the Bernstein polynomial, and its mathematical expression is as follows:

[0045]

[0046] In a further optimized solution, the inner wall drain port 11 is an arc surface opened on the inner wall of the volute body 4, and the radius calculation formula of the arc surface is:

[0047] R1=R2-L4;

[0048] Among them, R1 is the radius of the arc surface, R2 is the inner cavity radius of the volute body 4, and L4 is the distance between the center of the arc surface and the center of the inner cavity of the volute body 4.

[0049] According to a further optimized solution, the guide wall 12 is provided on a curved surface.

[0050] An impeller machine is applied with a low-resistance, high-flow volute, comprising: a motor front cover 3 clamped with a volute body 4, a motor base 1 fixedly installed on the side of the motor front cover 3 away from the volute body 4, an impeller motor 2 fixedly installed between the motor base 1 and the motor front cover 3, a motor shaft 7 of the impeller motor 2 extends into the volute body 4, an impeller 5 is coaxially arranged in the volute body 4, an impeller motor shaft hole 8 is coaxially opened on the impeller 5, and the motor shaft 7 is coaxially fixed in the impeller motor shaft hole 8.

[0051] According to a further optimized solution, a sealing base 14 is circumferentially arranged at the connection between the volute body 4 and the motor front cover 3 , and the sealing base 14 is opened on the volute body 4 .

[0052] According to a further optimized solution, a plurality of volute buckles 13 are fixedly connected to one side of the volute body 4 at equal intervals in the circumferential direction, and the volute body 4 is clamped to the motor front cover 3 through the volute buckles 13 .

[0053] The volute body 4 is clamped with the motor front cover 3 via a plurality of volute buckles 13 , and the sealing base 14 is abutted against the motor front cover 3 , thereby forming a sealed cabin 6 .

[0054] One specific example:

[0055] In the present invention, the diameters of the impeller machine drain port 9 and the impeller machine water inlet 10 are determined according to actual use requirements. In this example, the diameter D1 of the impeller machine drain port 9 is 9 mm, the diameter D2 of the impeller machine water inlet 10 is 10.7 mm, and the outer cross-sectional diameter D3 of the second drainage channel 16 is calculated according to the formula D3=(|D2-D1|)*A to obtain an outer cross-sectional diameter D3 of 5.1 mm, wherein the value range of A is [2,4], and the optimal value is 3;

[0056] The distance L1 between the outer section and the axis of the impeller machinery water inlet 10 is [18mm, 19.2mm], and the optimal value is 19mm. The distance L2 between the axis of the outer section and the upper end of the volute body 4 is [6mm, 10mm], and the optimal value is 7.3mm. The inner section diameter D4 is [6mm, 9mm], and the optimal value is 8mm. The distance L3 between the outer section and the inner section is [6mm, 10mm], and the optimal value is 8mm. The second drainage channel 16 is formed by connecting the outer section and the inner section through a second-order Bezier curve. The Bezier curve function form is as follows:

[0057]

[0058] Where n is the order of the Bezier curve, (i = 0, 1, 2, ..., n) is its n + 1 control points, which is a Bernstein polynomial. The mathematical expression is as follows:

[0059]

[0060] The control points P0 and P2 are the highest points of the outer and inner cross sections respectively. The distance between the two points ranges from [5mm, 12mm], and the optimal value is 8.5mm. Taking P0 as the origin, P0 is [0mm, 0mm], and P2 is [8.5mm, 1.45mm]. The x-coordinate value range of the control point P1 is [2mm, 8mm], and the y-coordinate value range is [1.5mm, 3mm], and the optimal value is [2.55mm, 2.5mm].

[0061] The inner wall drain outlet 11 is set as an arc surface, which is opened on the inner wall of the volute body 4. The distance L4 between the center of the arc surface and the axis of the volute body 4 is [5mm, 15mm], and the optimal value is 7.65mm. The radius of the arc surface R1 is calculated by the formula R1=R2-L4 to obtain 9mm, wherein the radius R2 of the volute body 4 is [19.55mm, 19.8mm], and the optimal value is 19.65mm.

[0062] Reference Figure 7 The guide wall 12 is opened on the arc surface of the inner wall drainage outlet 11, and is obtained by rotating the plane or projecting the curved surface at a certain angle with the straight line Z1 on the inner wall of the volute body 4 as the axis. Its shape includes but is not limited to rectangle, circle, triangle, trapezoid, etc.

[0063] Take the plane rectangle as an example: the straight line Z1 is located on the inner wall of the volute body 4, and the position is determined by the inner wall of the volute body 4. The position distance ratio P1 is determined in the range of [2%, 9%], and the optimal value is 5%. The rectangle length is the distance ratio P2 from the straight line Z1 to the axial line of the impeller machinery water inlet 10 is determined in the range of [60%, 85%], and the optimal value is 80%. The rectangle width is the outer section diameter D3 ratio P3 is determined in the range of [40%, 90%], and the optimal value is 80%. The rectangle rotation angle P4 is determined in the range of [25°, 60°], and the optimal value is 35°.

[0064] The impeller motor 2 drives the impeller 5 to rotate through the motor shaft 7. Water is sucked into the inner cavity (pump chamber) of the volute body 4 through the impeller machinery water inlet 10, obtains centrifugal force through the rotating blades on the impeller 5, and flows out to the impeller machinery drain port 9. The inner wall drain port 11 and the guide wall 12 allow water to easily and smoothly flow into the impeller machinery drain port 9, which can effectively improve the flow stability of the flow channel and improve the drainage efficiency of the impeller machinery.

[0065] Reference Figure 8 The flow rate of the impeller machinery of the present invention decreases slowly as the lift increases, and it has a higher flow rate than the existing impeller machinery. At a lift of 1.2m, its flow rate is increased by about 45.6%. Compared with the existing impeller machinery, the maximum lift of the impeller machinery of the present invention is increased by about 8.4%, and the noise is the same as the original impeller machinery.

[0066] The present invention improves the efficiency of the impeller machinery by setting the inner wall drain port 11 and the guide wall 12, and sets the second drain channel 16 by the Bezier curve. The second drain channel 16 can improve the problem of uneven water flow field at the drain port 9 of the impeller machinery and increase the working capacity.

[0067] The setting of the guide wall 12 and the inner wall drain port 11 can enable the water flow inside the volute body 4 to obtain a more suitable flow velocity and direction before entering the second drain channel 16, thereby increasing the drainage volume and improving the drainage efficiency. At the same time, the guide wall 12 and the inner wall drain port 11 are inclined to relieve the pressure at the drain port and weaken the drainage noise.

[0068] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0069] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A low resistance, high flow volute, characterized in that: include: A volute body (4), one end of the volute body (4) is coaxially provided with an impeller mechanical water inlet (10), an outer edge of the volute body (4) is fixedly connected with an impeller mechanical drain port (9), and the impeller mechanical drain port (9) is connected to the volute body (4) via a drain structure; The drainage structure comprises a second drainage channel (16), the second drainage channel (16) being connected to the inner cavity of the volute body (4) through an inner wall drainage port (11), a guide wall (12) being provided on the inner side wall of the volute body (4), one end of the guide wall (12) being connected to the inner wall drainage port (11), the second drainage channel (16) being connected to the first drainage channel (15), and the first drainage channel (15) being provided in the impeller machine drainage port (9).

2. A low resistance, high flow volute according to claim 1, characterized in that: The side of the second drainage channel (16) close to the volute body (4) is the outer side, and the calculation formula of the outer cross-sectional diameter of the second drainage channel (16) is: D3 = (|D2-D1|)*A; Wherein, D3 is the outer cross-sectional diameter of the second drainage channel (16), D2 is the diameter of the impeller machine water inlet (10), D1 is the diameter of the impeller machine drainage outlet (9), and A is a positive number.

3. A low resistance, high flow volute according to claim 2, characterized in that: The outer cross section and the inner cross section of the second drainage channel (16) are connected by a second-order Bezier curve, and the function form of the second-order Bezier curve is as follows: Where n is the order of the Bezier curve, P i (i=0,1,2,...,n) is its n+1 control point, b i，n (t) is the Bernstein polynomial, and its mathematical expression is as follows:

4. A low resistance, high flow volute according to claim 3, characterized in that: The inner wall drain port (11) is an arc surface opened on the inner side wall of the volute body (4), and the radius calculation formula of the arc surface is: R1 = R2 - L4; Among them, R1 is the radius of the arc surface, R2 is the radius of the inner cavity of the volute body (4), and L4 is the distance between the center of the arc surface and the center of the inner cavity of the volute body (4).

5. A low resistance, high flow volute according to claim 4, characterized in that: The flow guide wall (12) is arranged on the arc surface.

6. An impeller machine, using the low-resistance, high-flow volute according to any one of claims 1 to 5, characterized in that: include: A motor front cover (3) is snap-connected to the volute body (4); a motor base (1) is fixedly mounted on a side of the motor front cover (3) away from the volute body (4); an impeller motor (2) is fixedly mounted between the motor base (1) and the motor front cover (3); a motor shaft (7) of the impeller motor (2) extends into the volute body (4); an impeller (5) is coaxially arranged in the volute body (4); an impeller motor shaft hole (8) is coaxially opened on the impeller (5); and the motor shaft (7) is coaxially fixed in the impeller motor shaft hole (8).

7. The impeller machine according to claim 6, characterized in that: A sealing base (14) is circumferentially arranged at the connection between the volute body (4) and the motor front cover (3), and the sealing base (14) is opened on the volute body (4).

8. The impeller machine according to claim 7, characterized in that: A plurality of volute buckles (13) are fixedly connected to one side of the volute body (4) at equal intervals in the circumferential direction, and the volute body (4) is buckled onto the motor front cover (3) via the volute buckles (13).

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