Meridian acceleration impeller with outlet straight section flow channel and fan

Abstract

The utility model discloses a meridian acceleration impeller with an outlet straight section flow channel and a fan, the fan comprises the meridian acceleration impeller and a motor, the meridian acceleration impeller is installed on the motor and driven by the motor, and the meridian acceleration impeller with the outlet straight section flow channel is adopted as the meridian acceleration impeller. A straight section is arranged at an impeller air outlet of the meridian acceleration impeller outer ring, the angle alpha of the meridian acceleration impeller outer ring relative to a rotating shaft from an impeller air inlet to the impeller air outlet is firstly increased and then reduced to be transited to beta, beta = [0 degree, alpha], and the angle of the straight section relative to the rotating shaft is kept beta or gradually transited to beta from alpha. According to the meridian acceleration type fan, the straight section flow channel is additionally arranged, so that a relatively farther range can be provided and noise can be reduced on the basis of high static pressure of the meridian acceleration impeller, and the structure of the straight section of the meridian acceleration impeller can improve the overall strength of the impeller and improve impeller jumping at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a meridian acceleration impeller with an outlet straight section flow channel and a fan. Background Art

[0002] Meridian acceleration fan, also known as mixed flow fan or oblique flow fan, is a fan between axial flow fan and centrifugal fan. The impeller of the meridian acceleration fan allows the air to move both centrifugally and axially, and the movement of the air in the shell is a mixture of axial flow and centrifugal movement. Meridian acceleration fan has a higher wind pressure coefficient than axial flow fan and a larger flow coefficient than centrifugal fan. It fills the gap between axial flow fan and centrifugal fan. In this type of fan, the gas enters the impeller at a certain angle to the axis, obtains energy in the blade channel, and flows out in an inclined direction. The impeller and casing of the meridian acceleration fan are conical in shape, and are widely used in the ventilation and exhaust of high-end civil buildings such as hotels, restaurants, shopping malls, office buildings, gymnasiums, duct pressurized air supply, and ventilation and air exchange places of industrial and mining enterprises.

[0003] In practical applications, conventional meridian acceleration impellers still have room for improvement in air volume, noise, and especially range. Utility Model Content

[0004] In order to solve the above technical problems, the utility model designs a meridian acceleration impeller and a fan with an outlet straight section flow channel.

[0005] The utility model adopts the following technical solutions:

[0006] A meridian acceleration impeller with an outlet straight section flow channel, wherein the outer ring of the meridian acceleration impeller is provided with a straight section at the impeller outlet, and the angle α of the outer ring of the meridian acceleration impeller relative to the rotating shaft from the impeller air inlet to the impeller outlet first increases and then decreases to β, β=[0°,α], and the angle of the straight section relative to the rotating shaft remains β or gradually transitions from α to β. The impeller has a meridian acceleration flow channel rotating along the rotation center, and its blade tip entrainment velocity gradually increases from the inlet to the outlet. There is a straight section near the outlet, and the impeller flow area gradually decreases in the straight section, and the airflow is accelerated; the airflow at the impeller outlet is more concentrated than that of a traditional impeller without a straight transition section.

[0007] Preferably, the length of the outer ring of the meridian acceleration impeller is H, the length of the straight section of the impeller outlet is h, and 5mm≤h≤1 / 2H.

[0008] Preferably, the straight section of the outer ring of the meridian acceleration impeller has double rows of balancing block slots A and balancing block slots B, and the impeller air inlet side of the outer ring of the meridian acceleration impeller is a single row of balancing block slots. Dynamic balancing correction is more flexible and the impeller balancing accuracy is higher.

[0009] Preferably, the balancing block slot A and the balancing block slot B are arranged to be aligned inside and outside, so that the impeller has better runout and strength.

[0010] Preferably, the double-row balancing block slots A and balancing block slots B and the single-row balancing block slots are evenly arranged along the circumference, and the number of slots is 5-100, so that the slot size can be more suitable for conventional balancing blocks while ensuring the roundness of the outer ring of the slot.

[0011] Preferably, the meridian acceleration impeller is integrally formed by injection molding.

[0012] Preferably, a metal insert is installed at the screw hole of the inner ring of the meridian acceleration impeller for mounting the motor.

[0013] A meridian acceleration fan comprises a meridian acceleration impeller and a motor. The meridian acceleration impeller is mounted on the motor and driven by the motor. The meridian acceleration impeller is a meridian acceleration impeller with an outlet straight section flow channel.

[0014] The beneficial effect of the utility model is that the straight section flow channel added to the meridian acceleration fan can provide a relatively longer range and reduce noise based on the high static pressure of the meridian acceleration impeller, and the structure of the straight section of the meridian acceleration impeller can simultaneously improve the overall strength of the impeller and better impeller jump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a fan with an outlet straight section flow channel of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a meridian acceleration impeller with an outlet straight section flow channel of the utility model;

[0017] Figure 3 It is a cross-sectional view of the meridian acceleration impeller with an outlet straight section flow channel of the utility model;

[0018] In the figure: 1, straight section, 2, balancing block slot A, 3, balancing block slot B, 20, metal insert, 30, impeller air outlet, 31, impeller air inlet. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0020] Example: Figure 1-Figure 3As shown, a meridian acceleration fan comprises a meridian acceleration impeller with a straight section flow channel and a motor, the meridian acceleration impeller is mounted on the motor and driven by the motor, the outer ring of the meridian acceleration impeller is provided with a straight section 1 at the impeller air outlet, the angle α of the outer ring of the meridian acceleration impeller relative to the rotating shaft from the impeller air inlet 31 to the impeller air outlet 30 first increases and then decreases to β, β=[0°,α], the angle of the straight section relative to the rotating shaft remains β, and the angle of the outer ring of the meridian acceleration impeller relative to the rotating shaft is 0°<α≤60°.

[0021] The length of the outer ring of the meridian acceleration impeller is H, the length of the straight section of the impeller outlet is h, and 5mm≤h≤1 / 2H.

[0022] The straight section of the outer ring of the meridian acceleration impeller has double rows of balancing block slots A2 and balancing block slots B3, and the impeller air inlet side of the outer ring of the meridian acceleration impeller is a single row of balancing block slots. The double rows of balancing block slots A and balancing block slots B and the single row of balancing block slots are evenly arranged along the circumference, and the number of slots is 5-100. The balancing block slots A and balancing block slots B are aligned inside and outside. The meridian acceleration impeller is integrally formed by injection molding. A metal insert 20 is assembled at the screw hole of the inner ring of the meridian acceleration impeller for mounting the motor.

[0023] The straight section flow channel added to the meridian acceleration fan can provide a relatively longer range and reduce noise based on the high static pressure of the meridian acceleration impeller. The structure of the straight section of the meridian acceleration impeller can simultaneously improve the overall strength of the impeller and improve the impeller runout.

[0024] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A meridian acceleration impeller with an outlet straight section flow channel, characterized in that: The meridian acceleration impeller outer ring is provided with a straight section at the impeller outlet. The angle α of the meridian acceleration impeller outer ring relative to the rotating shaft from the impeller air inlet to the impeller air outlet first increases and then decreases to β, β=[0°,α], and the angle of the straight section relative to the rotating shaft remains β or gradually transitions from α to β.

2. A meridian acceleration impeller with an outlet straight section flow passage according to claim 1, characterized in that: The length of the outer ring of the meridian acceleration impeller is H, the length of the straight section of the impeller outlet is h, and 5mm≤h≤1 / 2H.

3. The meridian acceleration impeller with an outlet straight section flow channel according to claim 1, characterized in that: The straight section of the outer ring of the meridian acceleration impeller has double rows of balancing block grooves A and balancing block grooves B, and the impeller air inlet side of the outer ring of the meridian acceleration impeller is a single row of balancing block grooves.

4. A meridian acceleration impeller with an outlet straight section flow passage according to claim 3, characterized in that: The balancing weight slot A and the balancing weight slot B are arranged to be aligned inside and outside.

5. The meridian acceleration impeller with an outlet straight section flow passage according to claim 3, characterized in that: The double-row balancing weight slots A and balancing weight slots B and the single-row balancing weight slots are evenly arranged along the circumference, and the number of slots is 5-100.

6. The meridian acceleration impeller with an outlet straight section flow passage according to claim 1, characterized in that: The meridian acceleration impeller is integrally formed by injection molding.

7. The meridian acceleration impeller with an outlet straight section flow passage according to claim 1, characterized in that: The screw holes of the inner ring of the meridian acceleration impeller for mounting the motor are equipped with metal inserts.

8. A meridian acceleration fan with an outlet straight section flow channel, comprising a meridian acceleration impeller and a motor, wherein the meridian acceleration impeller is mounted on the motor and driven by the motor, and wherein: The meridian acceleration impeller adopts the meridian acceleration impeller with an outlet straight section flow channel as described in any one of claims 1 to 7.

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