Volute-free fan impeller efficiency testing device

Abstract

A volute-free fan impeller efficiency testing device comprises a base, an air inlet panel is arranged on one side of the base, an air inlet flow guide ring is arranged on the air inlet panel, a sliding motor mounting seat is arranged on the base, and a servo driving mechanism is further arranged on the base to drive the motor mounting seat to slide and stay at a set position. A bearing seat, a fan shaft, a torquemeter and a driving motor are arranged above the motor mounting seat, the torquemeter is arranged between the fan shaft and the driving motor, and the center lines of the fan shaft, the torquemeter and the driving motor and the center of the air inlet flow guide ring are kept on the same straight line; the free end of the fan shaft is used for configuring and installing a to-be-tested volute-free fan impeller.

Description

Technical Field

[0001] The utility model relates to a device for testing the efficiency of a fan impeller without a volute. Background Art

[0002] The traditional test of a fan without a volute is the total efficiency of the fan. The test of the impeller efficiency requires the use of the calibration motor method to perform the motor efficiency stripping and deduction calculation. In addition, the small-sized torque table cannot perform the test of the structure without a volute (the coaxiality after the lengthened drive shaft cannot be guaranteed, the test speed cannot be higher, the transmission loss is large, and the test process requires the motor performance characteristics to be known in advance); the acoustic test includes the drive motor and bearing transmission noise, and the impeller noise cannot be obtained. In addition, the existing method of testing and calibrating the motor without a volute requires the fan base to be configured one-to-one according to the impeller specifications, the sample preparation time is relatively long, and the process consumes a lot of cost resources.

[0003] When the traditional torque method is used to test the impeller efficiency of a volute-free fan, it has poor compatibility with small-sized impellers. Due to the length limit of the connecting parts and the unreasonable structural design, the centering and coaxiality are difficult to control, which may lead to large mechanical vibration and transmission losses. In addition, when the calibration motor method is used, there is a secondary calculation error when the total efficiency is deducted from the motor efficiency, and the power consumption value is not easy to be in the optimal area; and the calibration motor method test requires a large number of motors and corresponding fan bases, making it difficult to quickly and conveniently obtain the efficiency of various types of impellers. Summary of the invention

[0004] In view of the shortcomings existing in the above problems, the utility model provides a device for testing the efficiency of a volute-free fan impeller.

[0005] To achieve the above-mentioned purpose, the utility model provides an efficiency testing device for a volute-free fan impeller, comprising a base, an air inlet panel is provided on one side of the base, an air inlet guide ring is provided on the air inlet panel, a sliding motor mounting seat is provided on the base, and a servo drive mechanism is also provided on the base to drive the motor mounting seat to slide and stay in a set position, a bearing seat, a fan shaft, a torque meter, and a drive motor are provided above the motor mounting seat, the torque meter is arranged between the fan shaft and the drive motor, the center lines of the fan shaft, the torque meter, and the drive motor are kept in a straight line with the center of the air inlet guide ring, and the free end of the fan shaft is used for configuring and installing the volute-free fan impeller to be tested.

[0006] Furthermore, the air inlet panel is composed of multiple sets of transition rings, and correspondingly, the air inlet guide rings are also composed of multiple sets to form a correspondence.

[0007] Furthermore, the air inlet guide ring and the air inlet panel are assembled and spliced ​​by countersunk method to ensure that the joint surface is flat and that there is no foreign matter in the fluid intake state to cause boundary loss.

[0008] Furthermore, a sliding structure is realized between the motor mounting seat and the base through a slide rail and a slider, the slide rail is fixed on the base, and the slider is fixed below the motor mounting seat.

[0009] Furthermore, the servo drive mechanism includes a servo motor fixed on the base, a ball screw driven by the servo motor, and a nut seat threadedly connected to the ball screw, and the nut seat is fixedly connected to the motor mounting seat through a connecting piece.

[0010] Furthermore, the device also includes a control box, which has a built-in frequency converter, and the drive motor is switched on and off and the speed is adjusted by the frequency converter.

[0011] Furthermore, a muffler cover is fixed above the motor mounting seat, and the muffler cover houses the fan shaft, the torque meter, and the drive motor cover.

[0012] Furthermore, the muffler cover is made of a high-strength density board, and has muffler egg cotton inside, and the surface of the muffler egg cotton is evenly covered with an undulating spherical shape;

[0013] The beneficial effects of the utility model compared with the prior art are:

[0014] 1. The test device directly configures the torque meter between the drive motor and the impeller. The fan shaft, the torque meter and its drive motor form a work surface. The installation accuracy is guaranteed through design and manufacturing. It can well ensure that the small-sized impeller is tested at high speed and the additive manufacturing products in the research and development process can run at medium and low speeds. It can reduce the test errors caused by low flow, pressure and impeller power, reduce the system vibration caused by multi-component transmission, ensure that the drive motor power is directly output to the torque meter, and the torque meter is directly transmitted to the fan shaft, so as to obtain stable impeller power.

[0015] 2. The test device is designed to be high enough to ensure that it can adapt to the installation size of 630mm diameter impeller without volute. The air inlet panel is a plurality of transition rings, which can be used for various corresponding configurations of air inlet guide rings. The air inlet panel and the air inlet guide ring are assembled by countersunk method to ensure the flatness of the joint surface and the absence of foreign matter in the fluid intake state to cause boundary loss. The servo motor can control the rotation of the ball screw to make the motor mounting seat slide on the slide rail of the base, and one-to-one precise positioning and locking can be performed with different impellers and outlet heights.

[0016] 3. The test device is equipped with a set of independently pluggable control boxes. The internal PLC can control the servo motor to move the motor mount through the display screen above the control box, and the distance value can be input for precise movement control; a frequency converter is configured in the control box to switch and adjust the speed of the drive motor; the torque meter transmits the signal to the test device in the form of pulses through the signal line, and obtains the speed and torque values ​​to calculate the shaft power under the current working conditions.

[0017] 4. The test device introduces a movable motor mount driven by a servo motor, which enables the test device to be adjusted accurately and conveniently to adapt to the installation and testing of different types of impellers, greatly improving the versatility and work efficiency of the device. Compared with conventional torque benches, since the fan shaft, torque meter, and drive motor are highly aligned and coaxial during installation, the power of the drive motor is directly and effectively transmitted to the fan impeller, which can significantly reduce vibration, stably increase the upper limit of the measured speed, significantly improve the air volume, pressure, and torque values, ensure the accuracy and stability of torque measurement, and thus improve the accuracy of impeller efficiency testing.

[0018] 5. The design of the silencer effectively reduces the operating noise of the drive motor, torque meter, bearings, etc., and realizes the simultaneous monitoring and analysis of the impeller operating noise, ensuring that while obtaining the impeller performance data, the noise value under the working condition is measured simultaneously, meeting the needs of overall performance evaluation of the voluteless fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional diagram of a device for testing the efficiency of a fan impeller without a volute according to the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram behind the hidden muffler;

[0021] Figure 3 for Figure 2 Schematic diagram of the other direction.

[0022] In the figure: 1. base; 2. air inlet panel; 3. air inlet guide ring; 4. slide rail; 5. slider; 6. motor mounting seat; 7. servo drive mechanism; 71. servo motor; 72. ball screw; 73. nut seat; 74. connector; 8. drive motor; 9. torque meter; 10. bearing seat; 11. fan shaft; 12. silencer cover. DETAILED DESCRIPTION

[0023] like Figure 1 , Figure 2 and Figure 3As shown, a device for testing the efficiency of a volute-free fan impeller is provided in an embodiment of the utility model, comprising a base 1, an air inlet panel 2 is provided on one side of the base 1, an air inlet guide ring 3 is provided on the air inlet panel 2, a sliding motor mounting seat 6 is provided on the base 1, and a servo drive mechanism 7 is also provided on the base 1 to drive the motor mounting seat 6 to slide and stay at a set position, a bearing seat 10, a fan shaft 11, a torque meter 9, and a drive motor 8 are provided above the motor mounting seat 6, the torque meter 9 is arranged between the fan shaft 11 and the drive motor 8, the center lines of the fan shaft 11, the torque meter 9, and the drive motor 8 are kept in a straight line with the center of the air inlet guide ring 3, and the free end of the fan shaft 11 is used for configuring and installing the impeller of the volute-free fan to be tested; the air inlet panel 2 is a plurality of sets of transition rings, and correspondingly, the air inlet guide ring 3 is also a plurality of sets to form a correspondence; the air inlet guide ring 3 and the air inlet panel 2 are assembled and spliced ​​by countersunk method to ensure The joint surface is flat to ensure that there is no foreign matter in the fluid intake state causing boundary loss; a sliding structure is realized between the motor mounting seat 6 and the base 1 through a slide rail 4 and a slider 5, the slide rail 4 is fixed on the base 1, and the slider 5 is fixed below the motor mounting seat 6; the servo drive mechanism 7 includes a servo motor 71 fixed on the base 1, a ball screw 72 driven by the servo motor 71, and a nut seat 73 threadedly connected to the ball screw 72, and the nut seat 73 is fixedly connected to the motor mounting seat 6 through a connecting piece 74; the device also includes a control box, which has a built-in frequency converter, and the drive motor 8 is switched on and off and the speed is adjusted by the frequency converter; a silencer 12 is fixed above the motor mounting seat 6, and the silencer 12 covers the fan shaft 11, the torque meter 9, and the drive motor 8; the silencer 12 is made of high-strength density board, and has silencer egg cotton inside, and the surface of the silencer egg cotton is evenly covered with undulating spherical shapes.

[0024] The test device directly configures the torque meter between the drive motor and the impeller. The fan shaft, torque meter and its drive motor form a work surface. The installation accuracy is guaranteed by design and manufacturing. It can well ensure that the small impeller runs at high speed and ensure the medium and low speed operation of the additive manufacturing products in the research and development process, reduce the test errors caused by the small flow, pressure and impeller power, reduce the system vibration caused by the multi-component transmission, ensure that the drive motor power is directly output to the torque meter, and the torque meter is directly transmitted to the fan shaft, so as to obtain a stable impeller power. The test device is designed with sufficient height to ensure that it can adapt to the installation size of 630mm diameter without volute impeller. The air inlet panel is a plurality of transition rings, which can be used for various corresponding configurations of air inlet guide rings. The air inlet panel and the air inlet guide ring are combined and assembled by countersunk head to ensure that the joint surface is flat and there is no foreign matter in the fluid intake state to cause boundary loss; the servo motor can control the rotation of the ball screw to make the motor mounting seat slide on the slide rail of the base, and one-to-one precise positioning and locking are performed with different impellers and outlet heights. The test device is equipped with a set of independently pluggable control boxes. The internal PLC can control the servo motor to move the motor mount through the display screen above the control box, and the distance value can be input for precise movement control; a frequency converter is configured in the control box to switch and adjust the speed of the drive motor; the torque meter transmits the signal line to the test device in the form of pulses, and obtains the speed and torque values ​​to calculate the shaft power under the current working conditions. The test device introduces a movable motor mount driven by a servo motor, so that the test device can be adjusted accurately and conveniently to adapt to the installation and testing of impellers of different models, greatly improving the versatility and work efficiency of the device. Compared with conventional torque stations, since the fan shaft, torque meter, and drive motor are highly aligned and coaxial when installed, the power of the drive motor is directly and effectively transmitted to the fan impeller, which can significantly reduce vibration, stably increase the upper limit of the measured speed, significantly improve the air volume, pressure, and torque values, ensure the accuracy and stability of torque measurement, and thus improve the accuracy of impeller efficiency testing. The design of the silencer effectively reduces the operating noise of the drive motor, torque meter, bearings, etc., and realizes the simultaneous monitoring and analysis of the impeller operating noise, ensuring that while obtaining the impeller performance data, the noise value under the working condition is measured simultaneously, meeting the needs of overall performance evaluation of the voluteless fan.

[0025] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for testing the efficiency of a fan impeller without a volute, characterized in that: The invention comprises a base (1), an air inlet panel (2) is provided on one side of the base (1), an air inlet guide ring (3) is provided on the air inlet panel (2), a sliding motor mounting seat (6) is provided on the base (1), and a servo drive mechanism (7) is also provided on the base (1) to drive the motor mounting seat (6) to slide and stay at a set position, a bearing seat (10), a fan shaft (11), a torque meter (9), and a drive motor (8) are provided above the motor mounting seat (6), the torque meter (9) is arranged between the fan shaft (11) and the drive motor (8), the center lines of the fan shaft (11), the torque meter (9), and the drive motor (8) are kept in a straight line with the center of the air inlet guide ring (3), and the free end of the fan shaft (11) is used for arranging and mounting an impeller of a volute-free fan to be tested.

2. The device for testing the efficiency of a fan impeller without a volute according to claim 1, characterized in that: The air inlet panel (2) is composed of a plurality of transition rings, and correspondingly, the air inlet guide rings (3) are also composed of a plurality of sets to form a correspondence.

3. The device for testing the efficiency of a fan impeller without a volute according to claim 2, characterized in that: The air inlet guide ring (3) and the air inlet panel (2) are assembled and spliced ​​by countersunk method, so as to ensure that the joint surface is flat and that there is no foreign matter in the fluid intake state to cause boundary loss.

4. The device for testing the efficiency of a volute-free fan impeller according to claim 1, characterized in that: A slidable structure is realized between the motor mounting seat (6) and the base (1) via a slide rail (4) and a slider (5); the slide rail (4) is fixed on the base (1), and the slider (5) is fixed below the motor mounting seat (6).

5. The device for testing the efficiency of a volute-free fan impeller according to claim 1, characterized in that: The servo drive mechanism (7) comprises a servo motor (71) fixed on the base (1), a ball screw (72) driven by the servo motor (71), and a nut seat (73) threadedly connected to the ball screw (72), wherein the nut seat (73) is fixedly connected to the motor mounting seat (6) via a connecting piece (74).

6. The device for testing the efficiency of a volute-free fan impeller according to claim 1, characterized in that: The device also includes a control box, wherein the control box has a built-in frequency converter, and the drive motor (8) is switched on and off and the speed is adjusted by the frequency converter.

7. The device for testing the efficiency of a fan impeller without a volute according to claim 1, characterized in that: A muffler cover (12) is fixed above the motor mounting seat (6), and the muffler cover (12) covers the fan shaft (11), the torque meter (9), and the drive motor (8).

8. The device for testing the efficiency of a fan impeller without a volute according to claim 7, characterized in that: The silencer cover (12) is made of a high-strength density board and has silencer egg cotton inside, wherein the surface of the silencer egg cotton is in the shape of an evenly covered undulating spherical surface.

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