Traction ventilator with sand abrasion prevention structure

Abstract

The invention relates to the technical field of fans for power concentration motor train units, in particular to a traction ventilator with a wind sand abrasion prevention structure, which comprises an air inlet formed in the top end of a main air duct and an air inlet mounting plate movably mounted on the main air duct, and an abrasion prevention mechanism for preventing wind sand from abrading the inner wall of the main air duct is arranged in the main air duct. A noise reduction mechanism for reducing noise generated by operation of the fan is arranged in the main air duct, and a pressurization mechanism for increasing operation pressure of the fan is arranged in the main air duct. By arranging the anti-abrasion mechanism, sand and sand abrasion at the corner can be reduced, the centrifugal fan is suitable for the operation environment with severe sand and dust, by arranging the pressurization mechanism and adopting the mode of the centrifugal impeller and the double rows of guide blades (stationary blades), the separation loss of a low-speed area is reduced, the high pressure of the fan is guaranteed, and the efficiency is improved; the plate type blades with the sound level lower than A are adopted, matching between the blade outlet angle and the blade number is optimized, and the noise of the draught fan is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fans for power-concentrated EMUs, and in particular to a traction fan with a wind and sand wear-resistant structure. Background Art

[0002] The traction fan is a high flow coefficient, low noise axial centrifugal fan. One fan cools three traction motors at the same time. Due to the limitations of the space and layout of the EMU, the fan is installed vertically, with air entering from the top of the EMU and air exiting from the bottom. This type of fan requires large flow, high pressure, high efficiency, low noise, and is suitable for high dust environment.

[0003] The existing fan design has problems such as low pressure coefficient, high noise, easy wear when running in high dust environment, etc., which makes it difficult to meet the application requirements of high dust environment. In view of this, we provide a traction fan with anti-wind and sand wear structure. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a traction fan with an anti-wind and sand wear structure, which solves the technical problem in the prior art that the inner cylinder wall of the fan is easily worn when operating in a high dust environment, thereby reducing the problem of wind and sand wear on the fan and extending the service life of the entire device.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a traction fan with an anti-wind and sand wear structure, comprising an air inlet opened at the top of the main wind tube and an air inlet mounting plate movably installed on the main wind tube, an inner wind tube fixedly installed inside the main wind tube, an anti-wear mechanism for preventing wind and sand from wearing the inner wall of the main wind tube inside the main wind tube, a noise reduction mechanism for reducing the noise generated by the operation of the fan inside the main wind tube, and a boosting mechanism for increasing the operating pressure of the fan inside the main wind tube.

[0006] The anti-wear mechanism comprises a plurality of groups of anti-vortex plates installed inside the inner wind tube, and a wind shielding ring adapted to be connected with the anti-vortex plates is installed inside the inner wind tube.

[0007] Preferably, the noise reduction mechanism includes a motor mounting plate installed on the inner wall of the inner wind cylinder, a three-phase asynchronous motor is installed on the motor mounting plate, an impeller is arranged inside the inner wind cylinder, guide vane 1 and guide vane 2 are installed inside the inner wind cylinder, and an inner cylinder plate connected to the motor mounting plate is installed on the guide vane 1 and guide vane 2.

[0008] Preferably, the boost mechanism comprises a wheel core installed at the output end of the three-phase asynchronous motor, a rear wheel disc is installed on the wheel core, a plurality of groups of blades are connected to the rear wheel disc, and a front wheel disc is installed inside the inner wind cylinder.

[0009] Preferably, a plurality of groups of mounting flanges 1 are installed on the main air duct, and a mounting flange 2 is installed at the bottom end of the main air duct.

[0010] Preferably, the wind shield ring is an arc structure, and the gap between the wind shield ring and the impeller is 3-4 mm.

[0011] Preferably, the anti-vortex plates are symmetrically distributed in pairs inside the inner wind tube.

[0012] Preferably, the distance between guide vane 1 and guide vane 2 is 8-10 mm, and both are arc structures, and the arc radius and arc angle of guide vane 1 and guide vane 2 are different.

[0013] Preferably, the outlet angle of the blade is 59.5, and the leading edge of the blade is an inclined structure.

[0014] By means of the above technical solution, the present invention provides a traction fan with a wind and sand wear-resistant structure, which has at least the following beneficial effects:

[0015] 1. The present invention can reduce the pressure loss at the corner of the impeller outlet and reduce the wind and sand wear at the corner by arranging an anti-wear mechanism. In addition, with the cooperation of the wind shield ring and the anti-vortex plate, it can reduce the sand and dust in the air flow at the impeller outlet from entering the upper part of the wind duct and floating in the upper part of the wind duct. The anti-vortex plate prevents the sand and dust from rotating with the impeller and causing wear to the inner wall of the wind duct, thereby extending the service life of the entire device and being suitable for operating environments with relatively severe sand and dust.

[0016] 2. The present invention sets a boosting mechanism and adopts a centrifugal impeller + double-row guide vanes (stationary blades). Since the required pressure head of the fan is relatively high and the absolute airflow angle at the impeller outlet is too large, the double-row stator blades realize the twisting of the airflow, reduce the diversion flow in the stator channel, reduce the separation loss in the low-speed zone, ensure the high pressure of the fan and improve the efficiency.

[0017] 3. The present invention sets a noise reduction mechanism, adopts plate blades with lower sound level than A, optimizes the blade outlet angle and the number of blades, greatly reduces the fan noise. At the same time, the inner cylinder plate of the fan is an inclined structure, which reduces the eddy current loss at the fan impeller outlet, thereby solving the problem of small pressure coefficient of existing fans. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0019] In the attached picture:

[0020] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0021] Figure 2 It is a schematic plan view of the overall structure of the present invention;

[0022] Figure 3 It is a schematic plan view of the internal structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the top view of the structure of the present invention;

[0024] Figure 5 It is a schematic cross-sectional plan view of the internal structure of the main air duct of the present invention;

[0025] Figure 6 It is a schematic plan view of the local cross-sectional structure of the present invention.

[0026] In the figure: 1. Main air duct; 2. Air inlet; 3. Air inlet mounting plate; 4. Mounting flange 1; 5. Inner air duct;

[0027] 6. Anti-wear mechanism; 61. Anti-vortex plate; 62. Wind shield ring;

[0028] 7. Install flange 2;

[0029] 8. Noise reduction mechanism; 81. Motor mounting plate; 82. Three-phase asynchronous motor; 83. Impeller; 84. Guide vane 1; 85. Guide vane 2; 86. Inner cylinder plate;

[0030] 9. Supercharging mechanism; 91. Wheel core; 92. Rear wheel disc; 93. Blades; 94. Front wheel disc. DETAILED DESCRIPTION

[0031] 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.

[0032] Embodiment 1

[0033] Figure 1-Figure 6This is an embodiment of the present invention: Based on the problem that the inner cylinder wall of the fan is prone to wear when operating in a high dust environment in the existing prior art, this embodiment provides a traction fan with an anti-wind and sand wear structure, including an air inlet 2 opened at the top of the main wind cylinder 1 and an air inlet mounting plate 3 movably installed on the main wind cylinder 1, a plurality of groups of mounting flanges 4 are installed on the main wind cylinder 1, and the main wind cylinder 1 can be fixed by mounting flanges 4, which is also convenient for moving and transporting the entire device, and a mounting flange 2 7 is installed at the bottom end of the main wind cylinder 1, and the mounting flange 2 7 can fix the bottom end of the main wind cylinder 1, thereby improving the installation stability of the entire device, an inner wind cylinder 5 is fixedly installed inside the main wind cylinder 1, an anti-wear mechanism 6 is arranged inside the main wind cylinder 1 to prevent the inner wall of the main wind cylinder 1 from being worn by wind and sand, a noise reduction mechanism 8 is arranged inside the main wind cylinder 1 to reduce the noise generated by the operation of the fan, and a boosting mechanism 9 is arranged inside the main wind cylinder 1 to increase the operating pressure of the fan. The anti-wear mechanism 6 can reduce pressure loss, avoid the suspension of sand and dust, prevent sand and dust from wearing the inner wall of the inner wind tube 5, and improve the applicability of the device. The noise reduction mechanism 8 can reduce the noise generated by the operation of the fan and improve the efficiency of the fan. The boosting mechanism 9 can twist the airflow, reduce the diversion flow in the stator channel, reduce the separation loss in the low-speed zone, ensure the high pressure of the fan and improve the efficiency.

[0034] During the use of the fan, in order to make the fan adapt to relatively harsh environments, reduce the wear of sand and dust on the inner wall of the wind tube, and extend the service life of the entire device, the anti-wear mechanism 6 includes a plurality of groups of anti-vortex plates 61 installed inside the inner wind tube 5. The anti-vortex plates 61 are symmetrically distributed in pairs inside the inner wind tube 5, which can reduce the suspension of sand and dust in the air flow at the outlet of the impeller 83 in the upper part of the wind tube, thereby improving the anti-wear performance of the device. A wind shield ring 62 that is adapted to be connected to the anti-vortex plate 61 is installed inside the inner wind tube 5. The wind shield ring 62 has an arc structure. The arc-shaped wind shield ring reduces the pressure loss of the impeller outlet at the corner, reduces the wind and sand wear at the corner, and the gap between the wind shield ring 62 and the impeller 83 is 3-4 mm, thereby improving the anti-wear effect of the device and extending the service life of the fan. Through the cooperation between the anti-vortex plate 61 and the wind shield ring 62, the dust in the air flow at the outlet of the impeller 83 can be reduced from being suspended in the upper part of the wind tube. The anti-vortex plate 61 can prevent the dust from rotating with the impeller 83 and causing wear on the inner wall of the main wind tube 1, thereby playing a protective role for the fan.

[0035] Embodiment 2

[0036] Based on the first embodiment, Figure 1-Figure 6 As shown, based on the problem in the existing prior art that the inner cylinder wall of the fan is prone to wear when operating in a high dust environment, there is still a problem that the static pressure of the fan is difficult to reach 4500Pa, resulting in a low pressure coefficient. Therefore, the device is also provided with a structure to increase the pressure coefficient.

[0037] During the use of the fan, the operation of the fan will generate certain noise, which will affect the use environment of the fan. In order to reduce the noise generated by the operation of the fan and improve the practical performance of the device, the noise reduction mechanism 8 includes a motor mounting plate 81 installed on the inner wall of the inner wind tube 5, and a three-phase asynchronous motor 82 is installed on the motor mounting plate 81. An impeller 83 is arranged inside the inner wind tube 5, and a guide vane 1 84 and a guide vane 2 85 are installed inside the inner wind tube 5. The spacing between the guide vane 1 84 and the guide vane 2 85 is 8-10 mm, which is convenient for the two to cooperate with each other, so as to play a certain noise reduction role. Both of them are arc structures, and the arc structure can extend the propagation path of sound and improve the noise reduction performance of the device. The arc radius and arc angle of the guide vane 1 84 and the guide vane 2 85 are different, thereby further improving the noise reduction efficiency of the device. The guide vane 1 84 and the guide vane 2 85 are installed with an inner cylinder plate 86 connected to the motor mounting plate 81. Through the cooperation between the guide vane 1 84 and the guide vane 2 85 , the outlet angle of the blade 93 and the number of the blades 93 are optimally matched, which greatly reduces the noise generated by the operation of the fan and improves the operating environment of the fan.

[0038] Embodiment 3

[0039] On the basis of the first and second embodiments, Figure 1-Figure 6 As shown, based on the problem in the existing prior art that the inner cylinder wall of the fan is prone to wear when operating in a high dust environment, there is still a problem of high noise during fan operation, so the device is also provided with a noise reduction structure.

[0040] During the use of the fan, in order to increase the pressure and improve the efficiency of the fan, the booster mechanism 9 includes a wheel core 91 installed at the output end of the three-phase asynchronous motor 82, a rear wheel disc 92 is installed on the wheel core 91, and a plurality of groups of blades 93 are connected to the rear wheel disc 92. The outlet angle of the blade 93 is 59.5, so that the flow of the gas can be better reversed, thereby reducing the separation loss in the low-speed zone and increasing the pressure. The leading edge of the blade 93 is an inclined structure, which can better maintain the flow direction of the gas, thereby increasing the operating pressure of the fan and improving the performance of the entire device. A front wheel disc 94 is installed inside the inner wind tube 5. By adopting the centrifugal impeller + double-row guide vanes (static vanes), the flow of the airflow can be realized, the diversion flow in the stator channel is reduced, the separation loss in the low-speed zone is reduced, and the high pressure and efficiency of the fan are guaranteed.

[0041] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A traction fan with a wind and sand wear-resistant structure, comprising an air inlet (2) provided at the top of a main air cylinder (1) and an air inlet mounting plate (3) movably mounted on the main air cylinder (1), an inner air cylinder (5) being fixedly mounted inside the main air cylinder (1), characterized in that: The main wind tube (1) is provided with an anti-wear mechanism (6) for preventing wind and sand from wearing the inner wall of the main wind tube (1), the main wind tube (1) is provided with a noise reduction mechanism (8) for reducing the noise generated by the operation of the fan, and the main wind tube (1) is provided with a pressure-increasing mechanism (9) for increasing the operating pressure of the fan; The anti-wear mechanism (6) comprises a plurality of groups of anti-vortex plates (61) installed inside the inner wind tube (5), and a wind shielding ring (62) adapted to be connected to the anti-vortex plates (61) is installed inside the inner wind tube (5).

2. A traction fan with a wind and sand wear-resistant structure according to claim 1, characterized in that: The noise reduction mechanism (8) comprises a motor mounting plate (81) mounted on the inner wall of the inner wind tube (5), a three-phase asynchronous motor (82) being mounted on the motor mounting plate (81), an impeller (83) being arranged inside the inner wind tube (5), a guide vane 1 (84) and a guide vane 2 (85) being mounted inside the inner wind tube (5), and an inner tube plate (86) connected to the motor mounting plate (81) being mounted on the guide vane 1 (84) and the guide vane 2 (85).

3. A traction fan with a wind and sand wear-resistant structure according to claim 1, characterized in that: The boost mechanism (9) comprises a wheel core (91) mounted on the output end of a three-phase asynchronous motor (82), a rear wheel disc (92) being mounted on the wheel core (91), a plurality of groups of blades (93) being connected to the rear wheel disc (92), and a front wheel disc (94) being mounted inside the inner wind tube (5).

4. The traction fan with a wind and sand wear-resistant structure according to claim 1, characterized in that: The main air duct (1) is provided with a plurality of groups of mounting flanges 1 (4), and the bottom end of the main air duct (1) is provided with mounting flange 2 (7).

5. The traction fan with a wind and sand wear-resistant structure according to claim 1, characterized in that: The wind shield ring (62) is an arc structure, and the gap between the wind shield ring (62) and the impeller (83) is 3-4 mm.

6. The traction fan with a wind and sand wear protection structure according to claim 1, characterized in that: The anti-vortex plates (61) are symmetrically distributed in pairs inside the inner wind tube (5).

7. The traction fan with a wind and sand wear-resistant structure according to claim 2, characterized in that: The distance between the guide vane 1 (84) and the guide vane 2 (85) is 8-10 mm, and both are arc structures. The arc radius and arc angle of the guide vane 1 (84) and the guide vane 2 (85) are different.

8. The traction fan with a wind and sand wear-resistant structure according to claim 3, characterized in that: The outlet angle of the blade (93) is 59.5, and the leading edge of the blade (93) is an inclined structure.

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