Dynamic balance detector for fan

Abstract

The utility model discloses a dynamic balance detector for a fan. The dynamic balance detector comprises a base and a bottom measuring mechanism, supports are arranged on the upper surface of the base in a bilateral symmetry mode, mounting plates are arranged at the upper ends of the two supports respectively, arc-shaped containing grooves are formed in the upper ends of the two mounting plates respectively, and a single-chip microcomputer is arranged outside the base. The bottom measuring mechanism comprises a transverse mounting frame, a telescopic rod, a spring and a semi-arc plate, the transverse mounting frame is fixedly connected to the middle between the two mounting plates, the telescopic rod is fixedly connected to the upper end of the transverse mounting frame, and the semi-arc plate is fixedly connected to the telescopic end of the telescopic rod; a spring is fixedly connected between the outer arc surface of the semi-arc plate and the upper surface of the transverse mounting frame, the spring is movably arranged on the outer arc surface of the telescopic rod in a sleeving mode, vibration probes are evenly distributed in the semi-arc plate, and the vibration probes are electrically connected with a single-chip microcomputer in a two-way mode. The vibration probe can be attached to the fan main shaft in real time according to the amplitude of the fan main shaft, and the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a dynamic balance detector for a fan. Background Technique

[0002] The balance of a fan is crucial for the performance and stable operation of the ventilator. When the impeller of an unbalanced fan rotates at high speed, it may generate vibrations and noises exceeding the limit values. The excessive centrifugal force will damage the impeller support bearings, and the abnormal vibrations may quickly damage the impeller and bearings. Therefore, the dynamic balance detection of the fan is particularly important.

[0003] The operation of detecting the dynamic balance of the fan spindle is often carried out in the fan spindle production factory. The specific measurement method is to install the measuring instrument on the fan spindle successively through external bolts, and then use a drive motor to drive the fan spindle to rotate.

[0004] However, there are some problems in the way of installing each sensor with bolts in use. For example, the long-term vibration of the spindle will loosen the vibration sensors installed on the spindle, which will affect the measurement accuracy, and further affect the accuracy of the dynamic balance detection of the fan. For this reason, we propose a dynamic balance detector for a fan. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the existing defects, provide a dynamic balance detector for a fan, which can improve the test accuracy of the detector, and can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: A dynamic balance detector for a fan, including a base and a bottom measurement mechanism;

[0007] Base: On its upper surface, brackets are symmetrically arranged on the left and right. Installation plates are respectively arranged at the upper ends of the two brackets. Arc-shaped placement grooves are respectively arranged at the upper ends of the two installation plates. A single-chip microcomputer is arranged outside the base.

[0008] Bottom measurement mechanism: It includes a horizontal mounting frame, a telescopic rod, a spring and a semi-circular arc plate. The horizontal mounting frame is fixedly connected to the middle between the two installation plates. The upper end of the horizontal mounting frame is fixedly connected with a telescopic rod. The telescopic end of the telescopic rod is fixedly connected with a semi-circular arc plate. A spring is fixedly connected between the outer arc surface of the semi-circular arc plate and the upper surface of the horizontal mounting frame. The spring is movably sleeved on the outer arc surface of the telescopic rod. Uniformly distributed vibration probes are arranged inside the semi-circular arc plate. The vibration probes are bidirectionally electrically connected with the single-chip microcomputer. No matter how large the amplitude of the fan spindle is, the vibration probes can be tightly attached to the fan spindle in real time, improving the detection accuracy.

[0009] Further, it also includes a circular indexing instrument which is located outside the detector. The circular indexing instrument is electrically connected to the single-chip microcomputer bidirectionally to realize the function of measuring the eccentricity of the main shaft of the fan.

[0010] Further, it also includes a transverse reinforcing frame which is fixedly connected to the lower side between the two mounting plates. There are uniformly distributed diagonal reinforcing rods between the two mounting plates and the base to realize the function of enhancing the stability of the measuring instrument.

[0011] Further, it also includes a U-shaped fixing plate which is symmetrically and fixedly connected to the outer sides of the two mounting plates back and forth respectively to realize the function that the main shaft of the fan can closely adhere to the detector.

[0012] Further, it also includes a rotational speed probe which is fixedly connected to the middle of the left side of the left mounting plate. The rotational speed probe is electrically connected to the single-chip microcomputer bidirectionally to realize the function of measuring the rotational speed of the main shaft of the fan.

[0013] Further, it also includes a driver which is arranged at the rear end of the left mounting plate. The input end of the driver is electrically connected to the output end of the single-chip microcomputer to realize the function of driving the main shaft of the fan to operate.

[0014] Further, it also includes a bottom U-shaped sliding frame which is respectively arranged at the four corners of the upper surface of the base to realize the function of installing the measuring instrument on an external bracket.

[0015] Further, the bracket is designed to be hollow to ensure the stability of the entire detector.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: This fan dynamic balance detector has the following advantages:

[0017] When the dynamic balance detection of the fan needs to be carried out, the main shaft of the fan is disassembled, and then the main shaft of the fan is placed into the inner part of the arc-shaped placement groove by using a crane. During the placement process, the inner arc surface of the semi-circular plate contacts the lower middle part of the outer arc surface of the main shaft, and the vibration probe sequentially contacts the outer arc surface of the main shaft of the fan. Due to the influence of the spring expansion force, the semi-circular plate is jacked up to tightly adhere to the lower side of the outer arc surface of the main shaft of the fan, thereby driving the vibration probe to tightly adhere to the lower side of the outer arc surface of the main shaft of the fan. No matter how large the amplitude of the main shaft of the fan is, the vibration probe can always tightly adhere to the main shaft of the fan in real time, improving the accuracy of the fan dynamic balance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic cross-sectional structural diagram of the bottom measuring mechanism of the present utility model.

[0020] In the figure: 1 base, 2 support, 3 mounting plate, 4 arc-shaped placement groove, 5 bottom measuring mechanism, 51 horizontal mounting frame, 52 telescopic rod, 53 spring, 54 semi-circular plate, 6 horizontal strengthening frame, 7 inclined strengthening rod, 8 U-shaped fixing plate, 9 single-chip microcomputer, 10 vibration probe, 11 circular dividing instrument, 12 driver, 13 rotational speed probe, 14 bottom U-shaped sliding frame. Specific implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figure 1-2 , this embodiment provides a technical solution: a fan dynamic balance detector, including a base 1 and a bottom measuring mechanism 5;

[0023] Base 1: On its upper surface, supports 2 are symmetrically arranged on the left and right. At the upper ends of the two supports 2, mounting plates 3 are respectively provided. At the upper ends of the two mounting plates 3, arc-shaped placement grooves 4 are respectively provided. Outside the base 1, a single-chip microcomputer 9 is provided. It also includes a circular dividing instrument 11. The circular dividing instrument 11 is located outside the detector, and the circular dividing instrument 11 is electrically connected to the single-chip microcomputer 9 bidirectionally. It also includes a horizontal strengthening frame 6. The horizontal strengthening frame 6 is fixedly connected to the lower side between the two mounting plates 3. Uniformly distributed inclined strengthening rods 7 are provided between the two mounting plates 3 and the base 1. It also includes a U-shaped fixing plate 8. The U-shaped fixing plate 8 is fixedly connected to the outer sides of the two mounting plates 3 that are opposite to each other symmetrically in the front and back. It also includes a rotational speed probe 13. The rotational speed probe 13 is fixedly connected to the middle of the left side of the left mounting plate 3. The rotational speed probe 13 is electrically connected to the single-chip microcomputer 9 bidirectionally. It also includes a driver 12. The driver 12 is arranged at the rear end of the left mounting plate 3. The input end of the driver 12 is electrically connected to the output end of the single-chip microcomputer 9. It also includes a bottom U-shaped sliding frame 14. The bottom U-shaped sliding frames 14 are respectively arranged at the four corners of the upper surface of the base 1. The support 2 is of a hollow design. When the dynamic balance detection of the fan needs to be carried out, the main shaft of the fan is disassembled, and then the main shaft of the fan is placed into the arc-shaped placement groove 4 by using a crane, and then the main shaft of the fan is conventionally connected to the driver 12 through a conventional installation method;

[0024] Bottom measuring mechanism 5: It includes a transverse mounting frame 51, a telescopic rod 52, a spring 53 and a semi-circular plate 54. The transverse mounting frame 51 is fixedly connected to the middle between two mounting plates 3. The upper end of the transverse mounting frame 51 is fixedly connected with a telescopic rod 52. The telescopic end of the telescopic rod 52 is fixedly connected with a semi-circular plate 54. A spring 53 is fixedly connected between the outer arc surface of the semi-circular plate 54 and the upper surface of the transverse mounting frame 51. The spring 53 is movably sleeved on the outer arc surface of the telescopic rod 52. The inside of the semi-circular plate 54 is provided with vibration probes 10 evenly distributed. The vibration probes 10 are bidirectionally electrically connected to the single-chip microcomputer 9. During the process of placing the main shaft, the inner arc surface of the semi-circular plate 54 contacts the lower middle part of the outer arc surface of the main shaft. The vibration probes 10 sequentially contact the outer arc surface of the fan main shaft. Due to the influence of the elastic force of the spring 53, the semi-circular plate 54 is jacked up to closely adhere to the lower side of the outer arc surface of the fan main shaft, thereby driving the vibration probes 10 to closely fit the lower side of the outer arc surface of the fan main shaft. Then the circular dividing instrument 11 can be placed at the specified position. At the same time, the single-chip microcomputer 9 can be adjusted, and the driver 12 operates, thereby driving the fan main shaft to operate. When the fan main shaft is operating, the single-chip microcomputer 9 can be adjusted at the same time. The vibration probes 10, the circular dividing instrument 11 and the rotational speed probe 13 operate simultaneously. The vibration probes 10 measure the vibration amplitude of the fan main shaft in real time and return this information to the single-chip microcomputer 9 in real time. The rotational speed probe 13 operates in real time and returns the rotational speed information of the fan main shaft to the single-chip microcomputer 9 in real time. The circular dividing instrument 11 analyzes the eccentricity difference information of the fan main shaft in real time and returns it to the single-chip microcomputer 9 in real time. The single-chip microcomputer 9 processes the information returned by the vibration probes 10, the circular dividing instrument 11 and the rotational speed probe 13 in sequence, and processes this information, and gives various data of the fan main shaft.

[0025] The working principle of a fan dynamic balance detector provided by the present utility model is as follows: When a fan dynamic balance detection is required, the main shaft of the fan is disassembled, and then the main shaft of the fan is placed into the inner part of the arc-shaped placement groove 4 by using a crane. Then, through a conventional installation method, the main shaft of the fan is conventionally connected to the driver 12. During the process of placing the main shaft, the inner arc surface of the semi-circular plate 54 contacts the lower side of the outer arc surface of the main shaft, and the vibration probe 10 sequentially contacts the outer arc surface of the fan main shaft. Due to the influence of the elastic force of the spring 53, the semi-circular plate 54 is pushed up to tightly adhere to the lower side of the outer arc surface of the fan main shaft, thereby driving the vibration probe 10 to tightly fit the lower side of the outer arc surface of the fan main shaft. At this time, the circular indexing instrument 11 can be placed at the designated position, and at the same time, the single-chip microcomputer 9 can be adjusted. The driver 12 operates, thereby driving the fan main shaft to operate. When the fan main shaft is operating, at the same time, the single-chip microcomputer 9 can be adjusted, and the vibration probe 10, the circular indexing instrument 11, and the rotational speed probe 13 operate simultaneously. The vibration probe 10 measures the vibration amplitude of the fan main shaft in real time and returns this information to the single-chip microcomputer 9 in real time. The rotational speed probe 13 operates in real time and returns the rotational speed information of the fan main shaft to the single-chip microcomputer 9 in real time. The circular indexing instrument 11 analyzes the eccentricity difference information of the fan main shaft in real time and returns it to the single-chip microcomputer 9 in real time. The single-chip microcomputer 9 processes the information returned by the vibration probe 10, the circular indexing instrument 11, and the rotational speed probe 13 in sequence, processes this information, and gives various data of the fan main shaft.

[0026] It should be noted that the single-chip microcomputer 9 disclosed in the above embodiments has a specific model of S7-200, and the vibration probe 10, the circular indexing instrument 11, the driver 12, and the rotational speed probe 13 can be freely configured according to the actual application scenario. It is recommended to select the JK9300B01 vibration probe sensor for the vibration probe 10, the CA65 high-precision circular indexing instrument for the circular indexing instrument 11, the YWF 2E-92 outer rotor centrifugal fan driver for the driver 12, and the CS-3F model rotational speed probe for the rotational speed probe 13. The single-chip microcomputer 9 controls the operation of the vibration probe 10, the circular indexing instrument 11, the driver 12, and the rotational speed probe 13 by using the commonly used methods in the existing technology.

[0027] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A wind turbine dynamic balance detector, characterized in that: It comprises a base (1) and a bottom measuring mechanism (5); Base (1): brackets (2) are symmetrically arranged on the upper surface thereof, mounting plates (3) are respectively arranged at the upper ends of the two brackets (2), arc-shaped placement grooves (4) are respectively arranged at the upper ends of the two mounting plates (3), and a single-chip computer (9) is arranged outside the base (1); The bottom measuring mechanism (5) comprises a transverse mounting frame (51), a telescopic rod (52), a spring (53) and a semi-arc plate (54). The transverse mounting frame (51) is fixedly connected to the middle part between the two mounting plates (3). The upper end of the transverse mounting frame (51) is fixedly connected to the telescopic rod (52). The telescopic end of the telescopic rod (52) is fixedly connected to the semi-arc plate (54). The spring (53) is fixedly connected between the outer arc surface of the semi-arc plate (54) and the upper surface of the transverse mounting frame (51). The spring (53) is movably sleeved on the outer arc surface of the telescopic rod (52). The interior of the semi-arc plate (54) is provided with uniformly distributed vibration probes (10). The vibration probes (10) are bidirectionally electrically connected to the single-chip computer (9).

2. A wind turbine dynamic balance detector according to claim 1, characterized in that: It also comprises a circular indexer (11), which is located outside the detector and is bidirectionally electrically connected to the single-chip microcomputer (9).

3. A wind turbine dynamic balance detector according to claim 1, characterized in that: It also comprises a transverse reinforcement frame (6), wherein the transverse reinforcement frame (6) is fixedly connected to the lower side between the two mounting plates (3), and evenly distributed oblique reinforcement rods (7) are provided between the two mounting plates (3) and the base (1).

4. A wind turbine dynamic balance detector according to claim 1, characterized in that: It also comprises a U-shaped fixing plate (8), wherein the U-shaped fixing plate (8) is symmetrically fixedly connected to the opposite outer side surfaces of the two mounting plates (3) in a front-to-back manner.

5. A wind turbine dynamic balance detector according to claim 1, characterized in that: It also comprises a rotation speed probe (13), which is fixedly connected to the middle part of the left side surface of the left mounting plate (3), and the rotation speed probe (13) is bidirectionally electrically connected to the single chip computer (9).

6. A wind turbine dynamic balance detector according to claim 1, characterized in that: It also includes a driver (12), which is arranged at the rear end of the left mounting plate (3), and the input end of the driver (12) is electrically connected to the output end of the single chip computer (9).

7. A wind turbine dynamic balance detector according to claim 1, characterized in that: It also comprises a bottom U-shaped sliding frame (14), wherein the bottom U-shaped sliding frame (14) is respectively arranged at the four corners of the upper surface of the base (1).

8. A wind turbine dynamic balance detector according to claim 1, characterized in that: The support (2) is of hollow design.

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