A volute structure of a diagonal flow fan

Abstract

A volute structure of a diagonal flow fan, wherein an outer shell ring, an inner shell ring, and a volute pre-buffer structure constitute the volute structure of the diagonal flow fan; the outer shell ring includes a first outer shell ring and a second outer shell ring, the inner shell ring includes a first inner shell ring and a second inner shell ring, an outer drainage structure is provided between the first outer shell ring and the second outer shell ring, an inner drainage structure is provided between the first inner shell ring and the second inner shell ring, and the volute pre-buffer structure is a multi-stage buffer structure, including a first arc buffer section, a first straight plate buffer section, a second straight plate buffer section, a second arc buffer section, and a third straight plate buffer section connected in sequence. Due to the improvement of the volute structure of the diagonal flow fan, the flow characteristics are improved, the noise is reduced, and the conveying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a volute structure of a diagonal flow fan, in particular to a volute structure of a diagonal flow fan which has the advantages of improving flow characteristics, reducing noise and improving conveying efficiency. Background Art

[0002] Diagonal flow fans are fluid machines that have multiple rotating blades arranged radially with the hub as the center, and blow air in multiple directions to the rotating blades while being rotated by a motor, etc., in order to promote heat dissipation in air-cooled heat exchangers such as electric fans or ventilation fans, or radiators or condensers of automobiles. As products such as life production develop towards intensification and high power, the demand for ventilation and heat dissipation is increasing, and the ventilation performance of diagonal flow fans is attracting more and more attention. Therefore, it is particularly important to design and study the characteristics of diagonal flow fans.

[0003] Prior art CN209743192U discloses a diagonal flow fan, wherein the diagonal flow impeller comprises a plurality of rotor blades extending radially outward from an axially open hub, and the rotor blades are surrounded by an oil slinger. The oil slinger has a flow cross section extending radially outward in the axial flow direction and pointing to the inner wall of the housing. The motor is inserted into the axially open hub of the diagonal flow impeller and is completely enclosed by the hub. The motor extends in the axial direction, i.e., along the rotor shaft, to a depression at the center of the shaft, so that the depression can be positioned closer to the diagonal flow impeller.

[0004] However, the above-mentioned fans all have design limitations, poor adaptability, high power consumption, unstable air volume, low heat dissipation efficiency, high noise and strong vibration. Therefore, in response to these problems, the applicant proposes a new type of diagonal flow fan to solve the above-mentioned problems so as to improve the flow characteristics, reduce the impeller vibration and thus improve the air outlet effect and efficiency. Utility Model Content

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a volute structure of a diagonal flow fan.

[0006] In order to achieve the above purpose, this utility adopts the following technical solutions:

[0007] A volute structure of a diagonal flow fan, comprising a motor 1, wherein the motor 1 is connected to a hub 2 and drives it to rotate, and an impeller comprises blades 3 and an impeller cover ring 4, wherein the blades 3 are evenly arranged between the impeller cover ring 4 and the hub 2; wherein the outer shell ring, the inner shell ring, and the volute pre-buffer structure 5 constitute the volute structure of the diagonal flow fan; the outer shell ring comprises a first outer shell ring 6 and a second outer shell ring 7, and the inner shell ring comprises a first inner shell ring 8 and a second inner shell ring 9, and the outer shell ring and the inner shell ring are arranged in parallel; an external drainage structure is arranged between the first outer shell ring 6 and the second outer shell ring 7, and the external drainage structure is composed of a first outer drainage shell ring 10 and a second outer drainage shell ring 11, wherein an external drainage angle A is formed between the second outer drainage shell ring 11 and the second outer shell ring 7, and the external drainage structure is connected to the volute structure air duct through an external drainage inlet channel 16, and the external drainage inlet channel 16 is located between the first outer shell ring 6 and the second outer shell ring 7; an internal drainage structure is arranged between the first inner shell ring 8 and the second inner shell ring 9 The inner drainage structure includes an inner drainage shell ring 12, one end of the inner drainage shell ring 12 is welded to one end of the first inner shell ring 8, an inner drainage angle B is formed between the inner drainage shell ring 12 and the first inner shell ring 8, and the inner drainage structure is connected to the volute structure air duct through the inner drainage inlet channel 15, and the inner drainage inlet channel 15 is located between the first inner shell ring 8 and the second inner shell ring 9; the inner drainage guide vane 13 is arranged on one side of the inner drainage inlet channel 15 and is only connected to the first inner shell ring 8. The surface of the inner guide vane 13 is an arc structure; the outer guide vane 14 is arranged on one side of the outer guide inlet channel 16 and is only connected to the first outer casing ring 6, and the surface of the outer guide vane 14 is an arc structure; wherein A+B=135°-155°, B>90°; the volute pre-buffer structure 5 is a multi-stage buffer structure, and a tapered flow channel is formed between the outlet part of the volute pre-buffer structure 5 and the impeller cover ring 4, and the gas passing through the flow channel will produce a jet effect.

[0008] Furthermore, the volute front buffer structure 5 includes a first arc buffer section 51 , a first straight plate buffer section 52 , a second straight plate buffer section 53 , a second arc buffer section 54 , and a third straight plate buffer section 55 which are connected in sequence.

[0009] Furthermore, the radial distance between the inlet of the third straight plate buffer section 55 and the impeller cover ring 4 is the injection inlet clearance height H1, and the radial distance between the outlet of the third straight plate buffer section 55 and the impeller cover ring 4 is the injection outlet clearance height H2, wherein H1:H2=1.2-3.6.

[0010] Furthermore, the axial width of the outer flow inlet channel 16 is L1, the axial width of the inner flow inlet channel 15 is L2, and the radial height of the volute air duct between the outer shell ring and the inner shell ring is L3, wherein L3>L1>L2.

[0011] Furthermore, L3 <L1+L2。

[0012] Furthermore, the radius of the impeller is R, and the arc radius of the inner guide vane 13 is R1, wherein R1=(0.03-0.06)R.

[0013] Furthermore, the radius of the impeller is R, and the arc radius of the outer guide vane 14 is R2, wherein R2=(0.07-0.09)R.

[0014] Furthermore, the volute front buffer structure 5 adopts an integral injection molding structure.

[0015] The utility model discloses a volute structure of a diagonal flow fan, wherein an outer shell ring, an inner shell ring, and a volute pre-buffer structure 5 constitute the volute structure of the diagonal flow fan; the outer shell ring comprises a first outer shell ring 6 and a second outer shell ring 7, the inner shell ring comprises a first inner shell ring 8 and a second inner shell ring 9, an outer drainage structure is arranged between the first outer shell ring 6 and the second outer shell ring 7, an inner drainage structure is arranged between the first inner shell ring 8 and the second inner shell ring 9, and the volute pre-buffer structure 5 is a multi-stage buffer structure, comprising a first arc buffer section 51, a first straight plate buffer section 52, a second straight plate buffer section 53, a second arc buffer section 54, and a third straight plate buffer section 55 connected in sequence. As the volute structure of the diagonal flow fan is improved, the flow characteristics are improved, the noise is reduced, and the conveying efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a diagonal flow fan;

[0017] Figure 2 It is a cross-sectional view of a diagonal flow fan;

[0018] Figure 3 Schematic diagram of the volute front buffer structure.

[0019] In the figure: motor 1, hub 2, blades 3, impeller cover ring 4, volute pre-buffer structure 5, first arc buffer section 51, first straight plate buffer section 52, second straight plate buffer section 53, second arc buffer section 54, third straight plate buffer section 55, first outer shell ring 6, second outer shell ring 7, first inner shell ring 8, second inner shell ring 9, first outer drainage shell ring 10, second outer drainage shell ring 11, inner drainage shell ring 12, inner drainage guide vane 13, outer drainage flow guide vane 14, inner flow inlet channel 15, outer flow inlet channel 16, outer flow angle A, inner flow angle B, jet inlet clearance height H1, jet outlet clearance height H2, axial width L1 of outer flow inlet channel 16, axial width L2 of inner flow inlet channel 15, radial height L3 of volute air duct between outer shell ring and inner shell ring, impeller radius R, arc radius R1 of inner flow guide vane 13, arc radius R2 of outer flow guide vane 14; Figure 2 The middle arrows indicate the direction of air circulation. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the practical embodiment clearer, the technical solution in the practical embodiment will be clearly and completely described in conjunction with the drawings in the practical embodiment. Obviously, the described embodiment is a part of the embodiment of the practical embodiment, not all of the embodiments. Based on the embodiments in the practical embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this practical embodiment.

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-3 As shown, a volute structure of a diagonal flow fan comprises a motor 1, which is connected to a hub 2 and drives it to rotate, and an impeller comprises blades 3 and an impeller cover ring 4, and the blades 3 are evenly arranged between the impeller cover ring 4 and the hub 2; it is characterized in that: an outer shell ring, an inner shell ring, and a volute pre-buffer structure 5 constitute the volute structure of the diagonal flow fan; the outer shell ring comprises a first outer shell ring 6 and a second outer shell ring 7, and the inner shell ring comprises a first inner shell ring 8 and a second inner shell ring 9, and the outer shell ring and the inner shell ring are arranged in parallel; an external drainage structure is provided between the first outer shell ring 6 and the second outer shell ring 7, and the external drainage structure consists of a first outer drainage shell ring 10 and a second outer drainage shell ring 11, wherein an external drainage angle A is formed between the second outer drainage shell ring 11 and the second outer shell ring 7, and the external drainage structure is connected to the volute structure air duct through an external drainage inlet channel 16, and the external drainage inlet channel 16 is located between the first outer shell ring 6 and the second outer shell ring 7; a The inner drainage structure includes an inner drainage shell ring 12, one end of the inner drainage shell ring 12 is welded to one end of the first inner shell ring 8, and an inner drainage angle B is formed between the inner drainage shell ring 12 and the first inner shell ring 8. The inner drainage structure is connected to the volute structure air duct through the inner drainage inlet channel 15, and the inner drainage inlet channel 15 is located between the first inner shell ring 8 and the second inner shell ring 9; the inner drainage guide vane 13 is arranged on one side of the inner drainage inlet channel 15 and is only connected to the first inner shell ring 8. The surface of the inner guide vane 13 is an arc structure; the outer guide vane 14 is arranged on one side of the outer guide inlet channel 16 and is only connected to the first outer casing ring 6, and the surface of the outer guide vane 14 is an arc structure; wherein A+B=135°-155°, B>90°; the volute pre-buffer structure 5 is a multi-stage buffer structure, and a tapered flow channel is formed between the outlet part of the volute pre-buffer structure 5 and the impeller cover ring 4, and the gas passing through the flow channel will produce a jet effect.

[0023] Furthermore, the volute front buffer structure 5 includes a first arc buffer section 51 , a first straight plate buffer section 52 , a second straight plate buffer section 53 , a second arc buffer section 54 , and a third straight plate buffer section 55 which are connected in sequence.

[0024] Furthermore, the radial distance between the inlet of the third straight plate buffer section 55 and the impeller cover ring 4 is the injection inlet clearance height H1, and the radial distance between the outlet of the third straight plate buffer section 55 and the impeller cover ring 4 is the injection outlet clearance height H2, wherein H1:H2=1.2-3.6.

[0025] Furthermore, the axial width of the outer flow inlet channel 16 is L1, the axial width of the inner flow inlet channel 15 is L2, and the radial height of the volute air duct between the outer shell ring and the inner shell ring is L3, wherein L3>L1>L2.

[0026] Furthermore, L3 <L1+L2。

[0027] Furthermore, the radius of the impeller is R, and the arc radius of the inner guide vane 13 is R1, wherein R1=(0.03-0.06)R.

[0028] Furthermore, the radius of the impeller is R, and the arc radius of the outer guide vane 14 is R2, wherein R2=(0.07-0.09)R.

[0029] Furthermore, the volute front buffer structure 5 adopts an integral injection molding structure.

[0030] The utility model discloses a volute structure of a diagonal flow fan, wherein an outer shell ring, an inner shell ring, and a volute pre-buffer structure 5 constitute the volute structure of the diagonal flow fan; the outer shell ring comprises a first outer shell ring 6 and a second outer shell ring 7, the inner shell ring comprises a first inner shell ring 8 and a second inner shell ring 9, an outer drainage structure is arranged between the first outer shell ring 6 and the second outer shell ring 7, an inner drainage structure is arranged between the first inner shell ring 8 and the second inner shell ring 9, and the volute pre-buffer structure 5 is a multi-stage buffer structure, comprising a first arc buffer section 51, a first straight plate buffer section 52, a second straight plate buffer section 53, a second arc buffer section 54, and a third straight plate buffer section 55 connected in sequence. As the volute structure of the diagonal flow fan is improved, the flow characteristics are improved, the noise is reduced, and the conveying efficiency is improved.

Claims

1. A volute structure of a diagonal flow fan, comprising a motor (1), the motor (1) being connected to a hub (2) and driving the hub to rotate, the impeller comprising blades (3) and an impeller cover ring (4), the blades (3) being evenly arranged between the impeller cover ring (4) and the hub (2); characterized in that: An outer shell ring, an inner shell ring, and a volute front buffer structure (5) form a volute structure of a diagonal flow fan; the outer shell ring comprises a first outer shell ring (6) and a second outer shell ring (7), and the inner shell ring comprises a first inner shell ring (8) and a second inner shell ring (9), and the outer shell ring and the inner shell ring are arranged in parallel; an outer drainage structure is arranged between the first outer shell ring (6) and the second outer shell ring (7), and the outer drainage structure comprises a first outer drainage shell ring (10) and a second outer drainage shell ring (11), wherein an outer drainage angle A is formed between the second outer drainage shell ring (11) and the second outer shell ring (7), and the outer drainage structure is connected to the volute structure air duct through an outer drainage inlet channel (16), and the outer drainage inlet channel (16) is located between the first outer shell ring (6) and the second outer shell ring (7); an inner drainage structure is arranged between the first inner shell ring (8) and the second inner shell ring (9), and the inner drainage structure comprises an inner drainage shell ring (12), and one end of the inner drainage shell ring (12) is connected to the first inner shell ring ( The inner guide shell ring (12) and the first inner shell ring (8) are welded to one end of the inner guide shell ring (12), an inner guide angle B is formed between the inner guide shell ring (12) and the first inner shell ring (8), the inner guide structure is connected to the volute structure air duct through the inner guide inlet channel (15), and the inner guide inlet channel (15) is located between the first inner shell ring (8) and the second inner shell ring (9); the inner guide vane (13) is arranged on one side of the inner guide inlet channel (15) and is only connected to the first inner shell ring (8), and the surface of the inner guide vane (13) is circular. The outer guide vane (14) is arranged on one side of the outer guide inlet channel (16) and is connected only to the first outer casing ring (6), and the surface of the outer guide vane (14) is an arc structure; wherein A+B=135°-155°, and B>90°; the volute front buffer structure (5) is a multi-stage buffer structure, and a gradually contracting flow channel is formed between the outlet portion of the volute front buffer structure (5) and the impeller cover ring (4), and the gas will produce a jet effect when passing through the flow channel.

2. The volute structure of a diagonal flow fan according to claim 1, characterized in that: The volute front buffer structure (5) comprises a first circular arc buffer section (51), a first straight plate buffer section (52), a second straight plate buffer section (53), a second circular arc buffer section (54), and a third straight plate buffer section (55) which are connected in sequence.

3. A volute structure of a diagonal flow fan according to claim 2, characterized in that: The radial distance between the inlet of the third straight plate buffer section (55) and the impeller cover ring (4) is the injection inlet clearance height H1, and the radial distance between the outlet of the third straight plate buffer section (55) and the impeller cover ring (4) is the injection outlet clearance height H2, wherein H1: H2＝1.2-3.6。 4. The volute structure of a diagonal flow fan according to claim 1, characterized in that: The axial width of the outer flow inlet channel (16) is L1, the axial width of the inner flow inlet channel (15) is L2, and the radial height of the volute air duct between the outer shell ring and the inner shell ring is L3, wherein L3>L1>L2.

5. The volute structure of a diagonal flow fan according to claim 4, characterized in that: L3 <L1+L2。 6. The volute structure of a diagonal flow fan according to claim 1, characterized in that: The radius of the impeller is R, and the arc radius of the inner guide vane (13) is R1, wherein R1=(0.03-0.06)R.

7. The volute structure of a diagonal flow fan according to claim 1, characterized in that: The radius of the impeller is R, and the arc radius of the outer guide vane (14) is R2, wherein R2=(0.07-0.09)R.

8. The volute structure of a diagonal flow fan according to claim 2, characterized in that: The volute front buffer structure (5) adopts an injection-molded integral structure.

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