Improved impeller set and three-dimensional flow fan

Abstract

The utility model relates to the technical field of impellers, and provides an improved impeller set and a three-dimensional flow fan, the improved impeller set comprises a plurality of blades and a shaft disc, and the blades are annularly and uniformly welded on the shaft disc; the value range of the angle of one end of the inlet of the blade is [68 degrees, 71.5 degrees], the value range of the angle of the other end of the inlet of the blade is [36 degrees, 38.4 degrees], and the value range of the angle of the outlet of the blade is [58 degrees, 61.8 degrees]; the utility model has the beneficial effects that the inlet angle and the outlet angle of the blade are optimized, the air fluidity is better met, the working efficiency of the fan is greatly improved, and the energy-saving purpose of the fan is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of impellers, in particular to an improved impeller assembly and a three-dimensional flow fan. Background Art

[0002] The impeller is an important part of the fan. It is composed of continuously rotating blades, which convert energy between the fluid and the shaft power. Specifically, the impeller refers to the wheel disk with moving blades, and is also a component of the impulse turbine rotor. At the same time, the impeller can also refer to the wheel disk and the rotating blades installed on it.

[0003] In the prior art, the sizes of the inlet and outlet angles of the blades in the impeller group will directly affect the working efficiency of the fan. The gas fluidity of the current model 6-38 fan is poor when working, resulting in low working efficiency. Therefore, an improved impeller group and a three-dimensional flow fan are urgently needed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the above-mentioned technical problems existing in the prior art, an improved impeller group and a three-dimensional flow fan are provided, which optimize the blade inlet angle and outlet angle, are more in line with the fluidity of the gas, greatly improve the working efficiency of the fan, and thus achieve the purpose of fan energy saving.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means:

[0006] On the one hand, the utility model provides an improved impeller assembly, including blades and a shaft disk, wherein the blades are provided with a plurality of blades and are evenly welded to the shaft disk in an annular shape;

[0007] The value range of the angle at one end of the blade inlet is [68°, 71.5°], the value range of the angle at the other end of the blade inlet is [36°, 38.4°], and the value range of the outlet angle is [58°, 61.8°].

[0008] Optionally, the angle of one end of the blade inlet is 69.8°, and the angle of the other end of the blade inlet is 59°.

[0009] Optionally, the blade outlet angle is 60.3°.

[0010] Optionally, it also includes an impeller front disk and an impeller rear disk distributed front and back, and a plurality of blades are fixed between the impeller front disk and the impeller rear disk.

[0011] Optionally, a reinforcing plate is fixed between the impeller front disk and the impeller rear disk to improve the overall strength of the impeller assembly.

[0012] Optionally, a stopper is installed at the air inlet of the impeller front disk to guide and control the fluid entering the impeller assembly.

[0013] On the other hand, the utility model also provides a three-dimensional flow fan, including the above-mentioned improved impeller assembly.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] Based on the rotation speed and pressure coefficient of the 6-38 model three-dimensional flow fan, this impeller group has been tested many times and found that the angle of one end of the blade inlet is in the range of [68°, 71.5°], and the angle of the other end of the blade inlet is in the range of [36°, 38.4°], and the outlet angle is in the range of [58°, 61.8°], which is more in line with the fluidity of the gas, greatly improving the working efficiency of the fan, thereby achieving the purpose of fan energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall side cross-sectional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall side view structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0019] Markings in the figure: impeller rear disc 1, reinforcement plate 2, blades 3, impeller front disc 4, stop 5, shaft disc 6. DETAILED DESCRIPTION

[0020] See also Figure 1-3 , the embodiments of the utility model are further described;

[0021] An improved impeller assembly includes blades 3 and a shaft disc 6. The blades 3 are provided with a plurality of blades and are evenly welded on the shaft disc 6 in an annular shape. The shaft disc 6 is connected to a prime mover on the fan. When the prime mover is working, the shaft disc 6 and the plurality of blades 3 are driven to rotate, and the mechanical energy of the prime mover is converted into static pressure energy and dynamic pressure energy of the working fluid.

[0022] The value range of the angle of one end of the inlet of the blade 3 is [68°, 71.5°], and the value range of the angle of the other end of the inlet of the blade 3 is [36°, 38.4°], and the value range of the outlet angle is [58°, 61.8°]. The impeller assembly is used for a three-dimensional flow fan of model 6-38. According to the rotation speed and pressure coefficient of the three-dimensional flow fan of this model, after multiple tests, it is concluded that the angle of one end of the inlet of the blade 3 is in the range of [68°, 71.5°], and the angle of the other end of the inlet of the blade 3 is in the range of [36°, 38.4°], and the outlet angle is in the range of [58°, 61.8°], which is more in line with the fluidity of the gas, greatly improves the working efficiency of the fan, and thus achieves the purpose of energy saving of the fan.

[0023] The angle of one inlet end of the blade 3 is preferably 69.8°, and the angle of the other inlet end of the blade 3 is preferably 59°.

[0024] The outlet angle of the blade 3 is preferably 60.3°.

[0025] The impeller assembly further includes an impeller front disk 4 and an impeller rear disk 1 which are distributed front and back. A plurality of blades 3 are fixed between the impeller front disk 4 and the impeller rear disk 1 . The impeller front disk 4 and the impeller rear disk 1 play a fixing role for the blades 3 .

[0026] A reinforcing plate 2 is fixed between the impeller front disc 4 and the impeller rear disc 1 to improve the overall strength of the impeller assembly.

[0027] A stopper 5 is installed at the air inlet of the impeller front disk 4 to guide and control the fluid to enter the impeller assembly.

[0028] The utility model also provides a three-dimensional flow fan, including the improved impeller group in any of the above embodiments, a three-dimensional flow fan of model 6-38, according to the rotation speed and pressure coefficient of the three-dimensional flow fan of this model, the inlet angle and outlet angle of the blade 3 are optimized, which is more in line with the fluidity of the gas, greatly improving the working efficiency of the fan, thereby achieving the purpose of energy saving of the fan.

[0029] The 6-38 model three-dimensional flow fan was a two-dimensional flow fan before improvement. The two-dimensional flow fan has only one inlet angle and outlet angle, and the angle ranges are [27°, 31°] and [70°, 75°] respectively. The inlet angle and outlet angle of the two-dimensional flow fan are preferably 29° and 74°. The formula used in the test is as follows:

[0030]

[0031]

[0032]

[0033] Among them, the shaft power is obtained through torque meter testing.

[0034] Taking the flow rate of 8900m3 / h and the pressure of 3238N as an example, and the inlet angle and outlet angle of the three-dimensional flow fan and the two-dimensional flow fan are both the preferred angles for this test, the power (shaft power) required by the two-dimensional flow fan is 15KW, and the efficiency of the two-dimensional flow fan is 54%; while the three-dimensional flow fan under the same parameters (flow rate, pressure and output power), the power (shaft power) required by the three-dimensional flow fan is 11.76KW, and the efficiency of the three-dimensional flow fan is 68%;

[0035] Power saving = two-dimensional flow fan shaft power - three-dimensional flow fan shaft power

[0036] =15-11.76

[0037] =3.24KW

[0038] Assuming it runs 12 hours a day and 300 days a year, it can save about 11,700 kW of electricity each year; at 0.5 yuan per kilowatt-hour, the annual cost savings are about 5,900 yuan.

[0039] According to the actual test results, by optimizing the inlet and outlet angles of blade 4, it is more in line with the flow of gas, greatly improving the working efficiency of the fan, thereby achieving the purpose of fan energy saving.

Claims

1. An improved impeller assembly, comprising blades and a shaft disk, wherein the blades are provided in a plurality and are evenly welded to the shaft disk in an annular shape, characterized in that: The value range of the angle at one end of the blade inlet is [68°, 71.5°], the value range of the angle at the other end of the blade inlet is [36°, 38.4°], and the value range of the outlet angle is [58°, 61.8°].

2. An improved impeller assembly according to claim 1, characterized in that: The angle of one end of the blade inlet is 69.8°, and the angle of the other end of the blade inlet is 59°.

3. An improved impeller assembly according to claim 1, characterized in that: The blade outlet angle is 60.3°.

4. An improved impeller assembly according to claim 1, characterized in that: It also includes an impeller front disk and an impeller rear disk which are distributed front and back, and a plurality of blades are fixed between the impeller front disk and the impeller rear disk.

5. An improved impeller assembly according to claim 4, characterized in that: A reinforcing plate is fixed between the impeller front disc and the impeller rear disc to improve the overall strength of the impeller assembly.

6. An improved impeller assembly according to claim 4, characterized in that: A stopper is installed at the air inlet of the impeller front disk to guide and control the fluid to enter the impeller assembly.

7. A three-dimensional flow fan, characterized in that: The invention comprises the improved impeller assembly as described in any one of claims 1-6.

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