Magnetic suspension blower test run pipeline structure and test run method

Abstract

The invention belongs to the field of magnetic suspension air blowers, and particularly relates to a magnetic suspension air blower test run pipeline structure and a test run method.The magnetic suspension air blower test run pipeline structure comprises a magnetic suspension air blower, an air blower outlet flange, a test run pipe, a platinum thermal resistor, a pressure transmitter, an electric butterfly valve, an orifice plate flowmeter and an exhaust pipeline; the fan outlet flange is located on the upper portion of the magnetic suspension air blower, one end of the test run pipeline is connected with the fan outlet flange, the other end of the test run pipeline is connected with the exhaust pipeline, and the platinum thermistor and the pressure transmitter are installed on the test run pipeline. The electric butterfly valve and the orifice plate flowmeter are both arranged on the test run pipeline and located behind the platinum thermal resistor and the pressure transmitter, and the orifice plate flowmeter is located behind the electric butterfly valve; according to the invention, the test time can be greatly saved, the test efficiency is improved, and the dependence on manual debugging is avoided.

Description

Technical Field

[0001] The invention relates to the field of magnetic suspension blowers, and in particular to a test pipeline structure and a test method for a magnetic suspension blower. Background Art

[0002] In order to meet the user's on-site operating conditions, the magnetic levitation blower needs to undergo strict performance testing before leaving the factory to simulate on-site use. In actual applications, the same equipment has different requirements for use at different sites. If each speed is tested during the test, the efficiency is low and it is time-consuming and labor-intensive. If the on-site use requirements cannot be simulated, there will be certain risks to the stable operation of the equipment.

[0003] Therefore, in order to solve the above-mentioned problems, a magnetic levitation blower test pipeline structure and test method are specifically proposed. Summary of the invention

[0004] The present invention is aimed at the above-mentioned problems and specifically designs a magnetic levitation blower test pipeline structure and test method. The present invention can greatly save test time and improve test efficiency. The tested operating boundary line is set as the normal operating area, which ensures the adaptability of the equipment to the on-site working conditions, makes the equipment closer to the use conditions, has a higher degree of automatic adjustment, and avoids dependence on manual debugging.

[0005] To achieve the above-mentioned purpose, the present invention provides a magnetic levitation blower test pipeline structure, comprising: a magnetic levitation blower, a fan outlet flange, a test pipeline, a platinum thermal resistor, a pressure transmitter, an electric butterfly valve, an orifice flowmeter and an exhaust duct, the magnetic levitation blower is placed on the ground, the fan outlet flange is located at the upper part of the magnetic levitation blower, one end of the test pipeline is connected to the fan outlet flange, and the other end of the test pipeline is connected to the exhaust duct, the platinum thermal resistor and the pressure transmitter are installed on the test pipeline, the electric butterfly valve and the orifice flowmeter are both arranged on the test pipeline and located behind the platinum thermal resistor and the pressure transmitter, and the orifice flowmeter is located behind the electric butterfly valve.

[0006] Through the above method, the test pipeline is connected to the air outlet of the magnetic levitation blower. The gas exhausted by the magnetic levitation blower enters the exhaust duct through the test pipeline and is then discharged through the exhaust duct. During the discharge, the gas passes through various components on the test pipeline to measure the temperature, pressure and flow of the gas, thereby simulating the test environment and achieving the effect of simulating working conditions. The recorded data are also data of simulated working conditions.

[0007] The order in which the platinum thermal resistor 4, the pressure transmitter 5, the electric butterfly valve 6, and the orifice flowmeter 7 are installed on the test pipeline 3 is as follows: from the end of the test pipeline 3 connected to the magnetic suspension blower 1 to the end connected to the exhaust pipeline 8, the platinum thermal resistor 4, the pressure transmitter 5, the electric butterfly valve 6, and the orifice flowmeter 7 are installed in sequence. The electric butterfly valve 6 can control the flow in the test pipeline 3, and the orifice flowmeter 7 can measure the flow in the test pipeline 3.

[0008] Furthermore, the air inlet and the air outlet of the magnetic suspension blower are both installed with the platinum thermal resistor and the pressure transmitter.

[0009] Furthermore, the test run pipe is a curved pipe structure, one end of the test run pipe is connected to the upper part of the magnetic levitation blower, and the other end is connected to the side of the exhaust pipe.

[0010] In the above manner, the curved pipe-shaped structure can discharge the discharged wind upward.

[0011] The present invention also provides a magnetic suspension blower test method, comprising the following steps: Step 1: Run the magnetic suspension blower at the highest speed and rated current until the temperature at all locations is stable, and record the data at this time; Step 2: adjusting the speed to a speed close to the working condition, adjusting the magnetic suspension blower to a surge state through manipulation, and recording various data in the surge state; Step 3: Keep the speed unchanged, and change the pressure value by controlling the valve, so that every same change in pressure value is a test point, until the value of the orifice flow meter no longer changes by adjusting the valve, and record the data at all test points; Step 4: After the temperature of the magnetic suspension blower is stabilized, record various data; Step 5: Arrange and calculate each set of data obtained through the test points to obtain a curve graph of the magnetic levitation blower.

[0012] Furthermore, the data recorded in the above steps include: the temperature and pressure of the air inlet and outlet of the magnetic levitation blower, the pressure and temperature in the test pipeline, the value of the orifice flowmeter and the variable efficiency of the magnetic levitation blower.

[0013] Furthermore, the temperatures at various locations described in step one are stabilized to be the inlet and outlet temperatures of the magnetic levitation blower.

[0014] Furthermore, in the step 2, the magnetic suspension blower is adjusted to the surge state by closing the annular electric butterfly valve.

[0015] Furthermore, in step three, the specific method of controlling the gate to change the pressure value and record the test point is to gradually open the electric butterfly valve so that the pressure value is the same as a test point.

[0016] Furthermore, in step 4, after the temperature of the magnetic levitation blower is stabilized and various data are recorded, the rotation speed is adjusted to test and record the data of two to three test points.

[0017] Furthermore, the horizontal and vertical coordinates of the curve graph in step five are flow rate and polytropic efficiency, respectively.

[0018] In the above manner, the measured data are used to draw a curve in a coordinate diagram in which the horizontal and vertical coordinates are flow rate and variable efficiency, i.e., pressure ratio. According to different periods, the curve is divided into surge line, surge protection line, trip line, blockage line, and connecting line. The area surrounded by the curve and the straight line with a pressure ratio of 1.1 is the stable operation area of ​​the magnetic levitation blower, and the values ​​contained in the area of ​​the blower can be considered as normal operation.

[0019] In summary, the magnetic suspension blower test pipeline structure and test method of the present invention have the following advantages and beneficial technical effects: 1. The magnetic suspension blower test pipeline structure of the present invention can simulate the working conditions of the magnetic suspension blower during operation, achieve the experimental effect through a simple structure, and the test pipeline is provided with elements for measuring various data, which can record various data in the device at various times, providing a place for test experiments; 2. A magnetic suspension blower test method of the present invention obtains various data of the blower at each stage by controlling the working state of the magnetic suspension blower, simulates various states of the blower when in working condition, and improves the integrity of the data obtained by the test; 3. A magnetic suspension blower test method of the present invention arranges and combines the data of various states of the blower into line segments through the coordinate axes whose horizontal and vertical coordinates are flow and pressure ratio. The area above the line segment is the unsafe stage of the blower operation. Therefore, according to the curve chart, the state of the blower operation is controlled to ensure the safe operation of the blower; 4. The magnetic levitation blower test method of the present invention can greatly save test time, improve test efficiency, set the tested operating boundary line as the normal operating area, ensure the adaptability of the equipment to the on-site working conditions, make the equipment closer to the use conditions, and have a higher degree of automatic adjustment, avoiding dependence on manual debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a structural schematic diagram of a test pipeline structure of a magnetic suspension blower of the present invention; Figure 2 It is a schematic flow chart of a magnetic suspension blower test method of the present invention; Figure 3 The present invention is a curve diagram of the data obtained by the test pipeline structure and test method of a magnetic levitation blower.

[0021] The reference numerals in the accompanying drawings are: 1-magnetic levitation blower; 2-blower outlet flange; 3-test pipeline; 4-platinum thermal resistor; 5-pressure transmitter; 6-electric butterfly valve; 7-orifice flowmeter; 8-exhaust duct. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the implementation of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions; the described embodiments are part of the embodiments of the present invention, not all of the embodiments; the embodiments described below with reference to the drawings and directional terms are exemplary and are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The parts and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. The embodiments of the present invention are described in detail below in conjunction with the drawings: like Figure 1As shown, a test pipeline structure of a magnetic levitation blower includes: a magnetic levitation blower 1, a fan outlet flange 2, a test pipeline 3, a platinum thermal resistor 4, a pressure transmitter 5, an electric butterfly valve 6, an orifice flowmeter 7 and an exhaust pipeline 8. The magnetic levitation blower 1 is placed on the ground, the fan outlet flange 2 is located at the upper part of the magnetic levitation blower 1, one end of the test pipeline 3 is connected to the fan outlet flange 2 by bolts, and the other end of the test pipeline 3 is connected to the exhaust pipeline 8 by a flange. The platinum thermal resistor 4 and the pressure transmitter 5 are installed on the test pipeline 3, the electric butterfly valve 6 and the orifice flowmeter 7 are both arranged on the test pipeline 3 and located behind the platinum thermal resistor 4 and the pressure transmitter 5, and the orifice flowmeter 7 is located behind the electric butterfly valve 6. The order in which the platinum thermal resistor 4, the pressure transmitter 5, the electric butterfly valve 6, and the orifice flowmeter 7 are installed on the test pipeline 3 is as follows: from the end of the test pipeline 3 connected to the magnetic suspension blower 1 to the end connected to the exhaust pipeline 8, the platinum thermal resistor 4, the pressure transmitter 5, the electric butterfly valve 6, and the orifice flowmeter 7 are installed in sequence. The electric butterfly valve 6 can control the flow in the test pipeline 3, and the orifice flowmeter 7 can measure the flow in the test pipeline 3.

[0023] The test pipeline is connected to the air outlet of the magnetic levitation blower. The gas exhausted by the magnetic levitation blower enters the exhaust duct through the test pipeline and is then discharged through the exhaust duct. During the discharge, the gas passes through various components on the test pipeline to measure the temperature, pressure and flow of the gas, thereby simulating the test environment and achieving the effect of simulating working conditions. The recorded data are also data of simulated working conditions.

[0024] like Figure 1 As shown, the air inlet and the air outlet of the magnetic suspension blower 1 are both installed with a platinum thermal resistor 4 and a pressure transmitter 5 .

[0025] like Figure 1 As shown, the test pipe 3 is a curved pipe structure, one end of the test pipe 3 is connected to the upper part of the magnetic suspension blower 1, and the other end is connected to the side of the exhaust pipe 8.

[0026] A magnetic suspension blower test method of the present invention comprises the following steps: Step 1: Run the magnetic suspension blower 1 at the highest speed and rated current until the temperature at various locations is stable, and record various data at this time; Step 2: Adjust the speed to a speed close to the working condition, adjust the magnetic suspension blower 1 to the surge state through control, and record various data in the surge state; Step 3: Keep the speed unchanged, and change the pressure value by controlling the valve, so that every same change in the pressure value is a test point, until the value of the orifice flowmeter 7 no longer changes by adjusting the valve, and record the data at all test points; Step 4: After the temperature of the magnetic suspension blower 1 is stabilized, record various data; Step 5: Arrange and calculate each set of data obtained through the test points to obtain a curve graph of the magnetic levitation blower 1.

[0027] like Figure 2 and Figure 3 As shown, the data recorded in the above steps include: the temperature and pressure of the air inlet and outlet of the magnetic levitation blower 1, the pressure and temperature in the test pipeline 3, the value of the orifice flowmeter 7 and the variable efficiency of the magnetic levitation blower 1.

[0028] like Figure 2 and Figure 3 As shown, the temperatures at various locations in step 1 are stabilized to be the inlet and outlet temperatures of the magnetic suspension blower 1 .

[0029] like Figure 2 and Figure 3 As shown, in step 2, the method of adjusting the magnetic suspension blower 1 to the surge state is to close the annular electric butterfly valve 6.

[0030] like Figure 2 and Figure 3 As shown, in step three, the specific method of controlling the gate to change the pressure value and record the test point is to gradually open the electric butterfly valve 6 so that the pressure value is the same as a test point.

[0031] like Figure 2 and Figure 3 As shown, in step 4, after the temperature of the magnetic suspension blower 1 is stabilized and various data are recorded, the speed is adjusted to test the data of two to three test points and record them.

[0032] like Figure 3 As shown, the horizontal and vertical coordinates of the curve graph in step five are flow rate and variable efficiency, respectively. The measured data are used to draw a curve in a coordinate graph in which the horizontal and vertical coordinates are flow rate and variable efficiency, i.e., pressure ratio, respectively. According to different periods, the curve is divided into a surge line 10, a surge protection line 20, a trip line 30, a blocking line 40, and a connecting line 50. The area surrounded by the curve and the straight line with a pressure ratio of 1.1 is the stable operation area of ​​the magnetic suspension blower. The values ​​contained in the area of ​​the blower can be operated normally. The surge line is composed of the surge points of the blower at different flow rates and pressures, which is the prohibited operation line of the blower; the surge protection line is composed of points within a certain range from the surge point at different flow rates and pressures, which is the alarm line for the operation of the blower; the trip line is the maximum flow values ​​corresponding to different pressures of the blower at the rated speed; the blocking line is the maximum flow value at different operating frequencies; the connecting line is the flow value corresponding to different pressures when there is only pipeline resistance at the blower outlet.

[0033] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic suspension blower test pipeline structure, characterized in that: include: A magnetic levitation blower (1), a blower outlet flange (2), a test pipeline (3), a platinum thermal resistor (4), a pressure transmitter (5), an electric butterfly valve (6), an orifice flowmeter (7) and an exhaust pipeline (8), wherein the magnetic levitation blower (1) is placed on the ground, the blower outlet flange (2) is located on the upper part of the magnetic levitation blower (1), one end of the test pipeline (3) is connected to the blower outlet flange (2), and the other end of the test pipeline (3) is connected to the exhaust pipeline (8), the platinum thermal resistor (4) and the pressure transmitter (5) are installed on the test pipeline (3), the electric butterfly valve (6) and the orifice flowmeter (7) are both arranged on the test pipeline (3) and located behind the platinum thermal resistor (4) and the pressure transmitter (5), and the orifice flowmeter (7) is located behind the electric butterfly valve (6).

2. The magnetic suspension blower test pipeline structure according to claim 1, characterized in that: The air inlet and the air outlet of the magnetic suspension blower (1) are both installed with the platinum thermal resistor (4) and the pressure transmitter (5).

3. The magnetic suspension blower test pipeline structure according to claim 1, characterized in that: The test run pipe (3) is a curved pipe structure; one end of the test run pipe (3) is connected to the upper part of the magnetic suspension blower (1), and the other end is connected to the side of the exhaust pipe (8).

4. A magnetic suspension blower test method, characterized in that: A test method using a magnetic suspension blower test pipeline structure according to claim 1 comprises the following steps: Step 1: operate the magnetic suspension blower (1) at the highest speed and rated current until the temperature at various locations is stable, and record various data at this time; Step 2: adjusting the rotation speed to a rotation speed close to that in working condition, adjusting the magnetic suspension blower (1) to a surge state through manipulation, and recording various data in the surge state; Step 3: Keep the speed constant and change the pressure value by controlling the valve, so that every pressure change value is a test point, until the value of the orifice flow meter (7) no longer changes by adjusting the valve, and record the data at all test points; Step 4: After the temperature of the magnetic suspension blower (1) is stabilized, various data are recorded; Step 5: Arrange and calculate the groups of data obtained through the test points to obtain a curve graph of the magnetic levitation blower (1).

5. A magnetic suspension blower test method according to claim 4, characterized in that: The data recorded in the above steps include: the temperature and pressure of the air inlet and outlet of the magnetic levitation blower (1), the pressure and temperature in the test pipeline (3), the value of the orifice flow meter (7) and the variable efficiency of the magnetic levitation blower (1).

6. A magnetic suspension blower test method according to claim 4, characterized in that: The temperatures at various locations described in step 1 are stabilized to be the temperatures of the air inlet and outlet of the magnetic suspension blower (1).

7. A magnetic suspension blower test method according to claim 4, characterized in that: In the step 2, the magnetic suspension blower (1) is adjusted to the surge state by closing the annular electric butterfly valve (6).

8. A magnetic suspension blower test method according to claim 7, characterized in that: In step three, the specific method of controlling the gate to change the pressure value and record the test point is to gradually open the electric butterfly valve (6) so that the pressure value is the same as a test point.

9. A magnetic suspension blower test method according to claim 4, characterized in that: In the fourth step, after the temperature of the magnetic suspension blower (1) is stabilized and various data are recorded, the rotation speed is adjusted to test the data of two to three test points and record them.

10. A magnetic suspension blower test method according to claim 4, characterized in that: The horizontal and vertical coordinates of the curve graph in step five are flow rate and polytropic efficiency respectively.

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