High-pressure centrifugal fan

Abstract

The utility model relates to the technical field of centrifugal fans, in particular to a high-pressure centrifugal fan which comprises a steel base, a machine shell is connected to the left side of the steel base, an air inlet is connected to the left side of the machine shell, a sprayer is installed on the top of the air inlet, the bottom of the sprayer extends into the air inlet, and an air outlet is connected to the bottom of the rear side of the machine shell. A bearing box, a protective cover and a motor are sequentially connected to the top of the steel base from left to right, a spindle is arranged on the right side of the bearing box, and the left side of the spindle penetrates through the bearing box and extends into the machine shell. According to the high-pressure centrifugal fan, the air inlet, the machine shell and the impeller are matched, the overall volute-shaped structure of the machine shell, the convergent streamline overall structure of the air inlet and the efficient forward bending design of impeller blades are utilized, the conveying efficiency of the high-pressure centrifugal fan is effectively improved, meanwhile, noise in the operation process is reduced, and the service life of the high-pressure centrifugal fan is prolonged. And no great influence is brought to field workers, so that the field workers are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a high-pressure centrifugal fan. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air intake of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains; wind tunnel wind source and inflation and propulsion of hovercraft, etc.

[0003] There are many types of centrifugal fans, including high-pressure centrifugal fans, which are widely used in industrial production. Existing centrifugal fans have low air delivery efficiency and generate large noise during operation, which greatly affects the normal work of on-site workers. Therefore, in order to solve such problems, we proposed a high-pressure centrifugal fan. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a high-pressure centrifugal fan.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-pressure centrifugal fan comprises a steel base, wherein the left side of the steel base is connected to a casing, the left side of the casing is connected to an air inlet, a sprayer is installed on the top of the air inlet, the bottom of the sprayer extends to the inside of the air inlet, the bottom of the rear side of the casing is connected to an air outlet, the top of the steel base is connected to a bearing box, a protective cover and a motor from left to right in sequence, a main shaft is arranged on the right side of the bearing box, the left side of the main shaft passes through the bearing box and extends to the inside of the casing, and an end cover and an impeller are respectively sleeved on the left side of the outside of the main shaft.

[0007] Preferably, the bottom of the motor, the bottom of the bearing box and the bottom of the protective cover are all connected to the top of the steel base by bolts.

[0008] Preferably, a shock-absorbing pad is connected to the left side of the bottom of the steel base by bolts, and the right side of the air inlet is connected to the left side of the casing by bolts.

[0009] Preferably, the end cover is located on the left side of the impeller, and the casing is welded from titanium plates into an integral volute-shaped structure.

[0010] Preferably, the air inlet is made of titanium plate to form a convergent streamlined overall structure, and the main shaft is made of 45# high-quality carbon steel and is subjected to quenching and tempering treatment.

[0011] Preferably, the right side of the main shaft extends to the inside of the protective cover, and the output end of the motor extends to the inside of the protective cover and is connected to the main shaft through a diaphragm coupling.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model effectively improves the delivery efficiency of the high-pressure centrifugal fan through the coordination of the air inlet, the casing and the impeller, utilizing the overall volute structure of the casing, the convergent streamlined overall structure of the air inlet and the efficient forward curved design of the impeller blades, while also reducing the noise during operation, without causing a significant impact on on-site workers, thereby protecting on-site workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 For this utility model Figure 1 Right view of .

[0016] In the figure: 1. air inlet; 2. casing; 3. impeller; 4. bearing box; 5. protective cover; 6. motor; 7. steel base; 8. end cover; 9. shock pad; 10. main shaft; 11. sprinkler; 12. air outlet. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] See also Figure 1-Figure 2A high-pressure centrifugal fan comprises a steel base 7, the left side of the steel base 7 is connected to a casing 2, the left side of the casing 2 is connected to an air inlet 1, a sprayer 11 is installed on the top of the air inlet 1, the bottom of the sprayer 11 extends to the inside of the air inlet 1, the bottom of the rear side of the casing 2 is connected to an air outlet 12, the top of the steel base 7 is connected to a bearing box 4, a protective cover 5 and a motor 6 from left to right, a main shaft 10 is arranged on the right side of the bearing box 4, the left side of the main shaft 10 passes through the bearing box 4 and extends to the inside of the casing 2, and the left side of the outside of the main shaft 10 is respectively sleeved with an end cover 8 and an impeller 3; the impeller 3 is composed of The blades, conical front disc and straight rear disc are welded together, the rear disc and the hub are riveted, the blades are designed according to the new high-efficiency forward curved shape, the impeller 3 is tempered, machined and formed after welding, and then static and dynamic balance correction is performed, it has good aerodynamic performance, high efficiency, low noise and stable operation; the bearing box 4 adopts a multi-channel sealing form, which is mainly composed of an oil retaining ring, a rubber ring, and a gland seal with an oil return groove, which ensures the best sealing effect of the bearing box 4. There is enough volume in the bearing box 4 to place cooling oil, and it is equipped with an oil level indicator to facilitate users to detect on site to ensure the normal operation of the fan.

[0019] As a technical optimization solution of the utility model, the bottom of the motor 6, the bottom of the bearing box 4 and the bottom of the protective cover 5 are all connected to the top of the steel base 7 by bolts.

[0020] As a technical optimization solution of the utility model, the left side of the bottom of the steel base 7 is connected with a shock-absorbing pad 9 by bolts, and the right side of the air inlet 1 is connected to the left side of the casing 2 by bolts.

[0021] As a technical optimization solution of the utility model, the end cover 8 is located on the left side of the impeller 3, and the casing 2 is welded from titanium plates into an integral volute-shaped structure; the impeller 3 can be limited by the end cover 8 to prevent the impeller 3 from detaching from the main shaft 10.

[0022] As a technical optimization solution of the utility model, the air inlet 1 is made of titanium plate to form a convergent streamlined overall structure, and the air inlet 1 allows the gas to enter the impeller 3 evenly with less loss; the main shaft 10 is made of 45# high-quality carbon steel and is tempered.

[0023] As a technical optimization solution of the utility model, the right side of the main shaft 10 extends to the inside of the protective cover 5, and the output end of the motor 6 extends to the inside of the protective cover 5 and is connected to the main shaft 10 through a diaphragm coupling.

[0024] When the utility model is in use, the external control end of the high-pressure centrifugal fan is used to control the operation of the motor 6, thereby driving the main shaft 10 to rotate, and the main shaft 10 is used to drive the impeller 3 to rotate, so that the outside air is introduced through the air inlet 1 and discharged from the air outlet 12. Through the cooperation of the air inlet 1, the casing 2 and the impeller 3, the overall volute structure of the casing 2, the convergent streamlined overall structure of the air inlet 1 and the efficient forward curved design of the impeller 3 blades are used to effectively improve the delivery efficiency of the high-pressure centrifugal fan, and at the same time reduce the noise during operation, which will not have a significant impact on the on-site workers and protect the on-site workers.

[0025] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A high-pressure centrifugal fan, comprising a steel base (7), characterized in that: The left side of the steel base (7) is connected to the casing (2), the left side of the casing (2) is connected to the air inlet (1), the top of the air inlet (1) is equipped with a sprayer (11), the bottom of the sprayer (11) extends to the inside of the air inlet (1), the bottom of the rear side of the casing (2) is connected to the air outlet (12), the top of the steel base (7) is connected to the bearing box (4), the protective cover (5) and the motor (6) in sequence from left to right, the right side of the bearing box (4) is provided with a main shaft (10), the left side of the main shaft (10) passes through the bearing box (4) and extends to the inside of the casing (2), and the left side of the outside of the main shaft (10) is respectively provided with an end cover (8) and an impeller (3).

2. A high pressure centrifugal fan according to claim 1, characterized in that: The bottom of the motor (6), the bottom of the bearing box (4) and the bottom of the protective cover (5) are all connected to the top of the steel base (7) by bolts.

3. A high pressure centrifugal fan according to claim 1, characterized in that: The left side of the bottom of the steel base (7) is connected to a shock-absorbing pad (9) by bolts, and the right side of the air inlet (1) is connected to the left side of the casing (2) by bolts.

4. A high pressure centrifugal fan according to claim 1, characterized in that: The end cover (8) is located on the left side of the impeller (3), and the casing (2) is welded from titanium plates into an integral volute-shaped structure.

5. A high pressure centrifugal fan according to claim 1, characterized in that: The air inlet (1) is made of titanium plate to form a convergent streamlined integral structure, and the main shaft (10) is made of 45# high-quality carbon steel and is refined and tempered.

6. A high pressure centrifugal fan according to claim 1, characterized in that: The right side of the main shaft (10) extends to the inside of the protective cover (5), and the output end of the motor (6) extends to the inside of the protective cover (5) and is connected to the main shaft (10) through a diaphragm coupling.

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