Magnetic suspension fan pressure test system

Abstract

The utility model relates to the technical field of magnetic suspension fan pressure testing, and discloses a magnetic suspension fan pressure testing system which comprises a first connecting tee joint and a second connecting tee joint, the first connecting tee joint is provided with an air inlet end and two air outlet ends, and the second connecting tee joint is provided with two air inlet ends and an air outlet end; one end of the main passage is connected with an air outlet end of the first connecting tee joint and the sealing box, and the other end of the main passage is communicated with an air inlet end of the second connecting tee joint; one end of the bypass pipeline is connected with the other air outlet end of the first connecting tee joint, and the other end is connected with the other air inlet end of the second connecting tee joint; the valve is arranged on the bypass pipeline; and a connecting rod sealing mechanism is arranged in the sealing box. The magnetic suspension blower fan pressure test system satisfies system test of equipment, can well simulate on-site working conditions, can find control logic problems of the system and debugging problems of a magnetic suspension controller in advance, and greatly reduces fault rate of the magnetic suspension blower fan equipment in a client site.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic levitation fan pressure testing, and specifically to a magnetic levitation fan pressure testing system. Background Art

[0002] At present, all the pressure test units for magnetic levitation fans on the market are equipped with one or two valves at the air outlet of the fan, and the size of the air outlet of the magnetic levitation fan is controlled by adjusting the opening of these valves (ball valve, butterfly valve, gate valve). When testing the operation of the magnetic levitation fan equipment, the air outlet is changed from large to small through the valve, and the pressure of the air outlet will also gradually increase with the cross-section of the air outlet until it is adjusted to the rated pressure of the equipment. Once the valve opening is adjusted too much (after the outlet is too small), the magnetic levitation fan equipment will cause abnormal sound, severe surge and shaking of the equipment, and in severe cases, damage to the magnetic levitation motor, rotor, electric bearing, and protective bearing. Therefore, the valve can only be closed slowly and little by little to reduce the risk of over-adjustment. In this way, the system pressure when testing the magnetic levitation fan becomes a process of slowly climbing from low pressure to high pressure, which cannot simulate the customer's on-site working conditions. Equipment that has not undergone on-site working condition simulation is more likely to have problems at the customer's site. For example, when the bypass valve of the blower in the sewage industry is closed, the system pressure suddenly changes from more than 10 kPa to 60-80 kPa. If the control system and controller are not adjusted properly, this sudden change will cause equipment failure and malfunction. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present application provides a magnetic levitation fan pressure testing system.

[0005] (II) Technical solution

[0006] To solve the above problems, the present application provides the following technical solutions: A magnetic suspension fan pressure test system, characterized in that it comprises: a first connecting tee and a second connecting tee, the first connecting tee having an air inlet end and two air outlet ends, and the second connecting tee having two air inlet ends and one air outlet end;

[0007] One end of the main passage is connected to an outlet end of the first connecting tee and the sealing box, and the other end is connected to an inlet end of the second connecting tee; one end of the bypass pipeline is connected to the other outlet end of the first connecting tee, and the other end is connected to the other inlet end of the second connecting tee;

[0008] The valve is arranged on the bypass pipeline to simulate a sudden pressure change;

[0009] A connecting rod sealing mechanism is arranged in the sealing box, which can be opened when the pressure suddenly increases due to the rapid closing of the valve, and can quickly restore the seal when the pressure drops.

[0010] Preferably, a sealing cover is provided inside the sealing box, one side of which is connected to the connecting rod assembly via a first connecting block and can be rotated to close or open the air outlet end of the main passage.

[0011] Preferably, the connecting rod assembly includes a spring and a connecting rod, one end of the spring is connected to the first connecting block, and the other end is connected to the connecting rod, and is used to control the opening and closing of the sealing cover through elastic force.

[0012] Preferably, the end of the connecting rod passes through the bottom of the first connecting tee, and its extension length is adjusted by nuts and bolts, thereby adjusting the elastic force of the spring to control the pressure required to open the sealing cover.

[0013] Preferably, a bearing is provided at one end of the connecting rod connected to the spring, and the second connecting block is rotatably connected inside the bearing. The second connecting block is provided with a connecting hole connected to the spring to ensure that the normal working state of the spring is not affected when the connecting rod rotates.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present application provides a magnetic suspension fan pressure test system, which has the following beneficial effects:

[0016] 1. The magnetic levitation fan pressure test system meets the system test of the equipment, can well simulate the working conditions on site, discover the control logic problems of the system and the debugging problems of the magnetic levitation controller in advance, and greatly reduce the failure rate of the magnetic levitation fan equipment at the customer site; it provides reliable support for the debugging of the magnetic levitation fan equipment, equipment maintenance and long-term operation of the equipment in the later period, and further increases the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a magnetic suspension fan pressure test system for this application;

[0018] Figure 2 This is a structural schematic diagram of the bypass butterfly valve in the closed state of this application;

[0019] Figure 3 This is a schematic diagram of the bypass butterfly valve in this application when it is open;

[0020] Figure 4 This is a schematic diagram of the structure of the connecting rod mechanism of this application.

[0021] In the figure: 1, main passage; 2, first connecting tee; 3, sealing box; 4, second connecting tee; 5, bypass pipeline; 6, valve; 31, sealing cover; 32, first connecting block; 33, spring; 34, connecting rod; 35, nut; 36, bolt; 37, bearing; 38, second connecting block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] See also Figure 1 , the present application provides a new technical solution: a magnetic suspension fan pressure test system, including a first connecting tee 2 and a second connecting tee 4, the first connecting tee 2 including an air inlet end and two air outlet ends, the second connecting tee 4 including two air inlet ends and an air outlet end, the air inlet end is connected to the magnetic suspension fan, one air outlet end is connected to the main passage 1, the other end of the main passage 1 is connected to the sealing box 3, the other end of the sealing box 3 is connected to the air inlet end on one side of the second connecting tee 4, the air inlet end on one side of the first connecting tee 2, the main passage 1, the sealing box 3, and the air inlet end on one side of the second connecting tee 4 are the main passage, the air outlet end on the other side of the first connecting tee 2 is connected to the bypass pipeline 5, the other end of the bypass pipeline 5 is connected to the air inlet end on the other side of the second connecting tee 4, the air outlet end on the other side of the first connecting tee 2, the bypass pipeline 5, and the other air inlet end of the second connecting tee 4 are bypass pipelines;

[0024] The bypass line 5 is provided with a valve 6, which is preferably a butterfly valve, for simulating a sudden pressure change scenario during the test, especially a sudden pressure rise when the bypass valve is closed instantly.

[0025] The sealing box 3 is provided with a connecting rod sealing mechanism inside, which can open instantly due to a sudden pressure increase when the bypass butterfly valve is quickly closed, and then quickly restore the sealing state when the pressure drops, accurately simulating the impact effect of external pressure on the magnetic suspension rotor.

[0026] When the magnetic suspension fan device is connected to the first connecting tee 2 and starts working, the valve 6 is in the open state (see the attached Figure 2 ), the equipment enters the rated speed. At this time, the air volume generated by the magnetic levitation fan is from the bypass pipeline> butterfly valve (butterfly valve is open)> air outlet. Since the pipeline is unobstructed and there is no resistance in the pipe, basically no pressure is generated.

[0027] When the valve 6 on the bypass line is closed quickly (see Appendix Figure 3 ), the pressure in the pipeline has nowhere to be released, the pressure at the air outlet increases, and the pressure quickly pushes open the connecting rod sealing mechanism.

[0028] When the magnetic levitation fan equipment is shut down, the bypass valve inside the fan equipment opens and the inverter stops driving the motor; since the bypass valve inside the magnetic levitation fan equipment is opened, the pressure in the pressure test system will decrease. As the pressure decreases, the connecting rod sealing structure in the pressure test system will quickly seal the main air outlet; this can simulate the pressure in the on-site pipeline and the impact of the airflow on the magnetic levitation rotor at the moment of closure.

[0029] In some embodiments, the air outlet end of the main passage 1 is located inside the sealing box 3, and a sealing cover 31 is provided at the air outlet end of the main passage 1 for sealing the sealing cover 31. One side of the sealing cover 31 is rotatably connected to one side of the main passage 1, and the other side is connected to the connecting rod assembly at the bottom through a first connecting block 32; the sealing cover 31 can be pulled by the connecting rod assembly to seal the air outlet end of the main passage 1.

[0030] In some embodiments, the connecting rod assembly includes a spring 33 and a connecting rod 34. One end of the spring 33 is connected to the first connecting block 32, and the other end is connected to the connecting rod 34. The spring 33 pulls the sealing cover 31 to make the air outlet end of the main passage 1 in a sealed state. When the internal pressure of the main passage 1 is too high, the sealing cover 31 can be pushed to put the main passage 1 in an open state.

[0031] In some embodiments, the other end of the connecting rod 34 passes through the bottom of the first connecting tee 2, and a nut 35 is installed at the through hole below the first connecting tee 2. One end of the connecting rod 34 is provided with a thread, which is threadedly connected to the nut 35. The connecting rod 34 passes through the first connecting tee 2 and is provided with a bolt 36 at one end. The bolt 36 is turned with a wrench to drive the connecting rod 34 to rotate, and the length of the connecting rod 34 extending inside the main passage 1 can be adjusted. The elasticity of the spring 33 can be adjusted according to the expansion and contraction of the connecting rod 34, and the pressure of opening the sealing cover 31 can be adjusted, which can be adjusted according to needs.

[0032] In some embodiments, a bearing 37 is provided at one end of the connecting rod 34 connected to the spring 33, and a second connecting block 38 is rotatably connected inside the bearing 37. The second connecting block 38 is provided with a connecting hole connected to one end of the spring 33; this can ensure that the connecting rod 34 does not affect the spring 33 during the rotation process, and will not cause the spring 33 to rotate synchronously and deform.

[0033] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A magnetic suspension fan pressure test system, characterized in that: include: A first connecting tee, a second connecting tee, a main passage and a bypass pipeline, wherein the first connecting tee has an air inlet end and two air outlet ends, and the second connecting tee has two air inlet ends and one air outlet end; One end of the main passage is connected to an outlet end of the first connecting tee and the sealing box, and the other end is connected to an inlet end of the second connecting tee; one end of the bypass pipeline is connected to the other outlet end of the first connecting tee, and the other end is connected to the other inlet end of the second connecting tee; The bypass pipeline is provided with a valve for simulating a sudden pressure change; A connecting rod sealing mechanism is arranged in the sealing box, which can be opened when the pressure suddenly increases due to the rapid closing of the valve, and can quickly restore the seal when the pressure drops.

2. A magnetic suspension fan pressure test system according to claim 1, characterized in that: The connecting rod sealing mechanism comprises a sealing cover, one side of which is connected to the connecting rod assembly through a first connecting block and can be rotated to close or open the air outlet end of the main passage.

3. A magnetic suspension fan pressure test system according to claim 2, characterized in that: The connecting rod assembly comprises a spring and a connecting rod, one end of the spring is connected to the first connecting block, and the other end is connected to the connecting rod, and is used to control the opening and closing of the sealing cover through elastic force.

4. A magnetic suspension fan pressure test system according to claim 3, characterized in that: The end of the connecting rod passes through the bottom of the first connecting tee, and its extension length is adjusted by nuts and bolts, thereby adjusting the elastic force of the spring to control the pressure required for opening the sealing cover.

5. A magnetic levitation fan pressure test system according to claim 3, characterized in that: A bearing is provided at one end of the connecting rod connected to the spring, and the second connecting block is rotatably connected in the bearing. The second connecting block is provided with a connecting hole connected to the spring to ensure that the normal working state of the spring is not affected when the connecting rod rotates.

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