Graded combined adjusting device and method for efficient coupler of centrifugal blower

Abstract

The invention relates to the technical field of centrifugal blower adjustment, in particular to a centrifugal blower efficient coupler stepped combined adjustment device and method.The centrifugal blower efficient coupler stepped combined adjustment device comprises a motor, a magnetic coupler and a blower, and an output shaft of the motor is connected with an output shaft of the blower through the magnetic coupler; the magnetic coupler comprises a first magnetic rotating disc and a second magnetic rotating disc, the first magnetic rotating disc and the second magnetic rotating disc are arranged on an output shaft of the motor, a rotating cage is arranged on an output shaft of the air feeder, and the first magnetic rotating disc and the second magnetic rotating disc are sleeved with the rotating cage. Energy loss can be reduced, transmission efficiency is improved, and therefore the energy efficiency of the whole power generation system is improved. Meanwhile, due to the characteristic of no mechanical wear, the stability of the system is enhanced, and the failure rate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal blower adjustment, in particular to a centrifugal blower high-efficiency coupler step-by-step combined adjustment device and method. Background Art

[0002] With the acceleration of population growth and industrialization, global energy demand continues to grow. As a reliable energy supply method, thermal power plants can meet a large amount of electricity demand, especially in areas where energy demand is growing rapidly. There are some environmental problems in the process of thermal power generation, such as the emission of pollutants and greenhouse gases such as carbon dioxide, which have a certain impact on the environment. Therefore, during the construction and operation of thermal power plants, a series of environmental protection and consumption reduction measures need to be taken to reduce the impact on the environment.

[0003] In view of this situation, generally speaking, energy-saving transformation of fans is one of the important measures to reduce consumption. At present, there are two main means: one is to equip the fan with a frequency converter, variable speed operation, and improve the actual operating efficiency of the fan. The other is to carry out overall energy-saving transformation of the fan, improve the matching of the fan and the system, and make the fan run in the high-efficiency area.

[0004] Both existing technical routes have certain defects. Although the fan frequency conversion modification and the overall energy-saving modification of the fan can effectively reduce the power consumption of the blower, under the fan frequency conversion modification scheme: the frequency conversion modification requires the construction of a frequency converter room on site to maintain the frequency converter temperature at a low level, and has high requirements for the on-site space and ambient temperature. Under the overall energy-saving modification scheme of the fan: the fan body needs to be modified, including civil engineering, mechanical maintenance, electrical thermal control and other modifications, which is costly and time-consuming, and the overall modification payback period is relatively long.

[0005] Aiming at the problems that the selection margin of centrifugal blowers in existing power stations is large, the actual operating condition point is far from the design condition point, and the fan operating efficiency is low, and taking into account the problems that the use of variable frequency speed regulation is relatively complicated, the maintenance workload is large, and the frequency converter room occupies a large space, on the premise of minimizing the workload of on-site installation and maintenance, reducing the space occupied and improving the energy efficiency of the system, the present invention proposes a method and structure for using a magnetic coupling for step-by-step speed regulation on a centrifugal blower in a power station. To this end, the present invention proposes a centrifugal blower high-efficiency coupler step-by-step combined adjustment device and method. Summary of the invention

[0006] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide a centrifugal blower high-efficiency coupler step-by-step combined adjustment device.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: a centrifugal blower high-efficiency coupler step-by-step combined adjustment device, comprising a motor, a magnetic coupler, and a blower, wherein the output shaft of the motor is connected to the output shaft of the blower through the magnetic coupler.

[0009] As a preferred solution of the centrifugal blower high-efficiency coupler step-by-step combined adjustment device of the present invention, the magnetic coupler includes a first magnetic turntable and a second magnetic turntable arranged on the motor output shaft, and a rotating cage is arranged on the output shaft of the blower.

[0010] As a preferred solution of the step-by-step combined adjustment device for a high-efficiency coupler of a centrifugal blower of the present invention, the rotating cage is arranged outside the first magnetic turntable and the second magnetic turntable.

[0011] As a preferred solution of the centrifugal blower high-efficiency coupler step-by-step combined adjustment device of the present invention, wherein: the first magnetic turntable and the second magnetic turntable are not in contact with the rotating cage.

[0012] As a preferred solution of the centrifugal blower high-efficiency coupler step-by-step combined adjustment device of the present invention, wherein: the output shaft of the motor and the output shaft of the blower are aligned;

[0013] The axes of the first magnetic turntable and the second magnetic turntable coincide with the axis of the rotating cage.

[0014] Beneficial effects of the centrifugal blower high-efficiency coupler step-by-step combined adjustment device of the present invention: The present invention connects the motor and the blower through a magnetic coupler and adopts a non-mechanical contact transmission mode, which can reduce energy loss and improve transmission efficiency, thereby improving the energy efficiency of the entire power generation system. At the same time, due to its characteristic of no mechanical wear, it also enhances the stability of the system and reduces the failure rate.

[0015] In order to solve the above technical problems, the present invention also provides the following technical solutions: a centrifugal fan high-efficiency coupler step-by-step combined adjustment method, applied to the centrifugal fan high-efficiency coupler step-by-step combined adjustment device, comprising:

[0016] Calculate the performance parameters of the blower;

[0017] Establish the maximum output parameters of the system where the blower is located;

[0018] Adjust the air gap thickness H according to the performance parameters of the blower and the maximum output parameters of the system;

[0019] The number of gears is determined according to the speed of the blower;

[0020] Adjust the gear position according to the needs of the system in which the blower is located.

[0021] As a preferred solution of the centrifugal blower high-efficiency coupler step-by-step combined adjustment method of the present invention, the air gap thickness H is adjusted according to the opening K of the blower to achieve the gear switching of the blower.

[0022] As a preferred solution of the centrifugal blower high-efficiency coupler step-by-step combined adjustment method of the present invention, when the opening of the blower is at 70% or below for more than 1 minute, the speed is reduced by one gear.

[0023] As a preferred solution of the centrifugal blower high-efficiency coupler step-by-step combined adjustment method of the present invention, when the opening of the blower is at 95% or above for more than 1 minute, the speed is increased by one step.

[0024] As a preferred solution of the centrifugal blower high-efficiency coupler step-by-step combined adjustment method of the present invention, wherein: the speed change rate of the blower is less than 50r / min, and the opening change rate of the blower is less than 3% / second

[0025] The beneficial effect of the centrifugal blower high-efficiency coupler step-by-step combined adjustment method of the present invention is that the system stability can be achieved by adjusting the gear position in this way. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 It is an overall schematic diagram of the step-by-step joint adjustment device of the high-efficiency coupler of the centrifugal blower.

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the step-by-step joint adjustment device of the high-efficiency coupler of the centrifugal blower.

[0029] In the figure: 1. Motor; 2. Magnetic coupler; 21. First magnetic turntable; 22. Second magnetic turntable; 23. Rotating cage; 3. Air blower. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1, reference Figure 1 to Figure 2 , which is the first embodiment of the present invention, provides a centrifugal blower high-efficiency coupler step-by-step combined adjustment device, including a motor 1, a magnetic coupler 2, and a blower 3, wherein the output shaft of the motor 1 is connected to the output shaft of the blower 3 via the magnetic coupler 2.

[0034] In this embodiment, when the motor 1 is started, transmission is performed through the magnetic coupling 2 .

[0035] Specifically, the magnetic coupler 2 includes a first magnetic turntable 21 and a second magnetic turntable 22 arranged on the output shaft of the motor 1 , and a rotating cage 23 is arranged on the output shaft of the blower 3 .

[0036] In this embodiment, when the output shaft of the motor 1 rotates, the first magnetic turntable 21 and the second magnetic turntable 22 generate a magnetic coupling effect with the rotating cage 23, thereby driving the output shaft of the blower 3 to rotate.

[0037] Furthermore, the rotating cage 23 is sleeved on the outside of the first magnetic turntable 21 and the second magnetic turntable 22. In this embodiment, the first magnetic turntable 21 and the second magnetic turntable 22 both generate a magnetic coupling effect with the rotating cage 23, which can increase the output torque.

[0038] Among them, the first magnetic turntable 21 and the second magnetic turntable 22 are not in contact with the rotating cage 23. In this embodiment, the first magnetic turntable 21 and the second magnetic turntable 22 are not in contact with the rotating cage 23, which can reduce friction and wear, reduce energy loss, and improve transmission efficiency. Due to its characteristic of no mechanical wear, it also enhances the stability of the system and reduces the failure rate.

[0039] Preferably, the output shaft of the motor 1 is aligned with the output shaft of the blower 3; the axes of the first magnetic turntable 21 and the second magnetic turntable 22 coincide with the axis of the rotating cage 23. In this embodiment, the alignment of the output shafts and the coincidence of the axes can improve the smoothness of rotation.

[0040] When it is necessary to adjust the rotation speed of the blower 3, the rotation speed can be adjusted by adjusting the distance between the first magnetic turntable 21 and the second magnetic turntable 22 to change the air gap thickness. When adjusting the performance of the blower 3, the power of the blower 3 can be increased by adjusting the opening of the blower 3.

[0041] Example 2, reference Figure 1-2 , which is the second embodiment of the present invention, is different from the previous embodiment in that this embodiment provides a centrifugal fan high-efficiency coupler step-by-step combined adjustment method, which is applied to a centrifugal fan high-efficiency coupler step-by-step combined adjustment device, comprising:

[0042] Calculate the performance parameters of the blower 3;

[0043] Formulate the maximum output parameters of the system where the blower 3 is located;

[0044] Adjust the air gap thickness H according to the performance parameters of the blower 3 and the maximum output parameters of the system;

[0045] The number of gears is determined according to the rotation speed of the blower 3;

[0046] The gear position is adjusted according to the requirements of the system in which the blower 3 is located.

[0047] Specifically, the air gap thickness H is adjusted according to the opening K of the air blower 3 to achieve gear switching of the air blower 3. By adjusting the air gap thickness H, the rotation speed of the air blower 3 can be adjusted and then switched to different rotation speed gears.

[0048] Furthermore, when the opening of the air blower 3 is at or below 70% for more than 1 minute, the rotation speed is reduced by one level. By reducing the rotation speed, the power consumption of the air blower 3 can be reduced.

[0049] Preferably, when the opening of the air blower 3 is at 95% or above for more than 1 minute, the speed is increased by one gear. When the power required by the system is large, the gear is increased to ensure that the air blower 3 can have sufficient output power.

[0050] Preferably, the speed change rate of the blower 3 is less than 50 r / min, and the opening change rate of the blower 3 is less than 3% / second. This method can ensure the stable operation of the system.

[0051] The rest of the structure is the same as that of Example 1.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A centrifugal blower high-efficiency coupler step-by-step combined adjustment device, characterized in that: It comprises a motor (1), a magnetic coupler (2) and a blower (3), wherein the output shaft of the motor (1) is connected to the output shaft of the blower (3) via the magnetic coupler (2).

2. The centrifugal blower high-efficiency coupler step-by-step combined adjustment device according to claim 1, characterized in that: The magnetic coupler (2) comprises a first magnetic turntable (21) and a second magnetic turntable (22) which are arranged on the output shaft of the motor (1), and a rotating cage (23) is arranged on the output shaft of the blower (3).

3. The high-efficiency coupler step-by-step combined adjustment device for a centrifugal blower according to claim 2, characterized in that: The rotating cage (23) is sleeved on the outside of the first magnetic rotating disk (21) and the second magnetic rotating disk (22).

4. The centrifugal blower high-efficiency coupler step-by-step combined adjustment device according to claim 3, characterized in that: The first magnetic turntable (21) and the second magnetic turntable (22) are not in contact with the rotating cage (23).

5. The high-efficiency coupler step-by-step combined adjustment device for a centrifugal blower according to claim 4, characterized in that: The output shaft of the motor (1) is aligned with the output shaft of the blower (3); The axis centers of the first magnetic turntable (21) and the second magnetic turntable (22) both coincide with the axis center of the rotating cage (23).

6. A method for combined adjustment of high-efficiency couplers of centrifugal blowers in different grades, applied to the device for combined adjustment of high-efficiency couplers of centrifugal blowers in different grades as claimed in any one of claims 1 to 5, characterized in that: include, Calculating performance parameters of the air blower (3); Formulate the maximum output parameters of the system in which the blower (3) is located; The air gap thickness H is adjusted according to the performance parameters of the air blower (3) and the maximum output parameters of the system; The number of gears is determined according to the rotation speed of the blower (3); The gear position is adjusted according to the requirements of the system in which the blower (3) is located.

7. The method for combined adjustment of high-efficiency couplers of centrifugal blowers according to claim 6, characterized in that: The air gap thickness H is adjusted according to the opening degree K of the air blower (3), thereby achieving gear switching of the air blower (3).

8. The method for combined adjustment of high-efficiency couplers of centrifugal blowers according to claim 7, characterized in that: When the opening degree of the air supply fan (3) is at or below 70% for more than 1 minute, the rotation speed is reduced by one level.

9. The method for combined adjustment of high-efficiency couplers of centrifugal blowers according to claim 8, characterized in that: When the opening degree of the air supply fan (3) is at 95% or above for more than 1 minute, the rotation speed is increased by one level.

10. The method for combined adjustment of high-efficiency couplers of centrifugal blowers according to claim 9, characterized in that: The speed change rate of the air blower (3) is less than 50 r / min, and the opening change rate of the air blower (3) is less than 3% / second.

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