Nuclear island centrifugal fan

Abstract

The utility model discloses a nuclear island centrifugal fan, and belongs to the field of nuclear island centrifugal fans. Comprising a base; the first bracket is arranged on the base; the machine shell is installed on the first support, and the machine shell is provided with an air inlet and an air outlet; the motor is mounted on the shell; one end of the connecting shaft is connected to the output end of the motor, and the other end of the connecting shaft extends into the shell; the impeller is rotationally arranged in the machine shell, and one end of the impeller is fixedly arranged on the connecting shaft; the center line of the air outlet and the center line of the motor are located on the same straight line. The nuclear island centrifugal fan has the beneficial effects that the wind speed of an outlet is reduced, and the nuclear island centrifugal fan has the beneficial effects of being symmetrical and compact in structure.

Description

Technical Field

[0001] This application relates to the field of centrifugal fans for nuclear islands, and more specifically, to a centrifugal fan for nuclear islands. Background Technology

[0002] Centrifugal fans in nuclear islands are a component of the ventilation system of nuclear power plants. Existing centrifugal fans in nuclear islands have problems such as high outlet air velocity and structural asymmetry in the fan casing, resulting in excessively large installation dimensions. Utility Model Content

[0003] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0004] To address the technical problems mentioned in the background section above, some embodiments of this application provide a nuclear island centrifugal fan, comprising:

[0005] Base;

[0006] The first support is located on the base;

[0007] The housing is mounted on the first bracket and has an air inlet and an air outlet.

[0008] The motor is mounted on the housing;

[0009] The connecting shaft has one end connected to the output end of the motor and the other end extending into the housing;

[0010] The impeller is rotatably mounted inside the casing, and one end of the impeller is fixed to the connecting shaft;

[0011] The center line of the air outlet and the center line of the motor are on the same straight line.

[0012] When in use, this application involves connecting the power supply, causing the motor to run and drive the impeller via the connecting shaft. This draws air in through the air inlet, through the impeller and the casing, and then discharges it through the air outlet. By aligning the centerline of the air outlet with the centerline of the motor, the outlet air velocity is reduced, and the design features a symmetrical and compact structure.

[0013] Furthermore, the casing is composed of a semi-circular section and a straight section.

[0014] Furthermore, the casing is symmetrically arranged.

[0015] Furthermore, the air outlet, the first bracket, and the casing are connected by welding.

[0016] Furthermore, the nuclear island centrifugal fan also includes a second bracket fixed on the base, and the motor is mounted on the second bracket.

[0017] Furthermore, the air inlet adopts a conical arc shape.

[0018] Furthermore, the impeller adopts backward-curved oblique blades and a single-plate structure.

[0019] The beneficial effects of this application are: it provides a nuclear island centrifugal fan that reduces outlet wind speed and has the characteristics of symmetrical and compact structure. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0021] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0022] In the attached diagram:

[0023] Figure 1 This is an overall schematic diagram based on an embodiment of this application;

[0024] Figure 2 This is a structural schematic diagram as part of an embodiment, mainly showing the casing.

[0025] Figure label:

[0026] 1. Base; 2. First bracket; 3. Second bracket; 4. Housing; 5. Motor; 6. Connecting shaft; 7. Impeller; 8. Air inlet; 9. Air outlet; 10. Semicircular section; 11. Straight section. Detailed Implementation

[0027] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0028] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0029] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0030] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0031] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Reference Figure 1-2 A centrifugal fan for a nuclear island includes a base 1, a first support 2, a second support 3, a housing 4, a motor 5, a connecting shaft 6, and an impeller 7. The first support 2 and the second support 3 are both fixed to the base 1 by bolts. The housing 4 is mounted on the first support 2. The motor 5 is mounted on the housing 4 and the second support 3 by bolts, respectively. The second support 3 supports the motor 5. The connecting shaft 6 is located on the output end of the motor 5, and the other end extends into the housing 4 and is fixedly connected to the impeller 7. The impeller 7 is located inside the housing 4. The housing 4 has an air inlet 8 and an air outlet 9. The air outlet 9, the first support 2, and the housing 4 are connected by welding. The centerline of the air outlet 9 and the centerline of the motor 5 are on the same straight line.

[0033] The casing 4 is rigidly connected to the air inlet 8, the second bracket 3, the motor 5, and other components, which can ensure the strength and rigidity of the fan and avoid the scraping between the rotor impeller 7 and the stationary air inlet 8 caused by external impacts, earthquakes, and other forces.

[0034] The casing 4 is composed of a semi-circular part 10 and a straight part 11, which increases the area of ​​the air outlet 9, reduces the outlet air velocity, and increases the static pressure at the fan outlet.

[0035] The housing 4 is symmetrically arranged, so there is no distinction between left-handed and right-handed rotation, making the structure more compact and easier to install.

[0036] The air inlet 8 is designed with a conical arc shape and has a gap between it and the impeller 7 to minimize air intake loss and improve fan efficiency. The specific clearance fit should conform to the requirements of JB / T10563 "Technical Conditions for General Purpose Centrifugal Fans".

[0037] Impeller 7 adopts backward-curved oblique blades and a single-plate structure.

[0038] As attached Figure 1 As shown by the middle arrow, when in use, the power is turned on and the motor 5 runs, which drives the impeller 7 to run through the connecting shaft 6, so that air is drawn in through the air inlet 8 and passes through the impeller 7 and the casing 4, and is discharged through the air outlet 9.

[0039] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A centrifugal fan for a nuclear island, characterized in that: include: Base; The first bracket is disposed on the base; A housing is mounted on the first bracket, and the housing has an air inlet and an air outlet. The motor is mounted on the housing; A connecting shaft, one end of which is connected to the output end of the motor, and the other end extends into the housing; An impeller is rotatably disposed within the housing, and one end of the impeller is fixedly disposed on the connecting shaft; The centerline of the air outlet and the centerline of the motor are on the same straight line.

2. The nuclear island centrifugal fan according to claim 1, characterized in that: The casing consists of a semi-circular section and a straight section.

3. The nuclear island centrifugal fan according to claim 1, characterized in that: The casing is symmetrically arranged.

4. The nuclear island centrifugal fan according to claim 1, characterized in that: The air outlet, the first bracket, and the casing are connected by welding.

5. The nuclear island centrifugal fan according to claim 1, characterized in that: The nuclear island centrifugal fan also includes a second bracket fixedly mounted on the base, and the motor is mounted on the second bracket.

6. The nuclear island centrifugal fan according to claim 1, characterized in that: The air inlet is designed in a conical arc shape.

7. The nuclear island centrifugal fan according to claim 1, characterized in that: The impeller adopts backward-curved oblique blades and a single-plate structure.

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