Dynamic balance testing device and measuring method

Abstract

The invention discloses a dynamic balance testing device and a measuring method, and relates to the field of fan maintenance, the dynamic balance testing device comprises a mounting assembly and a control assembly, the mounting assembly is used for mounting and fixing a fan, and then the control assembly is used for collecting data and controlling start and stop of the fan. The mounting assembly can be used for fixedly mounting a fan, and the control assembly comprises a test electric cabinet arranged on one side of the mounting assembly and a vibration sensor fixedly mounted on the mounting assembly; the testing electric cabinet controls start and stop of the fan and receives signals of the vibration sensor, the vibration sensor fixed on the measuring support transmits the unbalance amount of the upper face and the lower face of the fan to the electric testing system, the position and the mass of the unbalance amount of the fan are measured, and the dynamic balance testing machine special for the fan is used for eliminating operation vibration of the fan. The cost for purchasing the fan is saved, and the maintenance quality of the control loop is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fan maintenance, in particular to a dynamic balance testing device and a measuring method. Background Art

[0002] The fan of the inverter cabinet of WK-20 / 35 vertical electric shovel, model RH35B-2EK, is a high-speed fan manufactured by Siemens, with a speed of 3000 rpm. The fan is an outer rotor fan, and its bearings are prone to failure after long-term operation. The housing of the control circuit is cast aluminum, and its rotating end cover and bearing cup are integrally processed and welded to the stator winding. The shaft structure space is small, and the existing maintenance process cannot check the dynamic balance of the fan's rotating parts. The control circuit with excessive fan vibration can only be scrapped, causing great waste.

[0003] Therefore, it is necessary to develop a method for using a self-braking balancing machine to perform dynamic balancing tests on rotating parts of a control circuit, improve the maintenance process of the fan, and extend the service life of the fan. Summary of the invention

[0004] In view of the problems existing in the above-mentioned dynamic balancing test device, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to perform a balance test on a fan.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a dynamic balancing test device, comprising a mounting assembly, which can be used to fix and install a fan;

[0007] A control assembly, comprising a test electric cabinet disposed on one side of the mounting assembly and a vibration sensor fixedly mounted on the mounting assembly;

[0008] The test electric cabinet controls the start and stop of the fan and receives the vibration sensor signal.

[0009] As a preferred solution of the dynamic balancing test device of the present invention, the installation assembly includes a fixing frame, a measuring bracket and a dynamic balancing base, the fixing frame is fixedly connected to the measuring bracket, and the measuring bracket is arranged on the dynamic balancing base.

[0010] As a preferred solution of the dynamic balancing test device of the present invention, wherein: the vibration sensor is fixedly mounted on the measuring bracket.

[0011] As a preferred solution of the dynamic balancing test device of the present invention, wherein: the test electric cabinet comprises a contactor for controlling the start and stop of the control circuit, and the contactor is connected in series with the first power line;

[0012] The contactor is also connected in parallel with the first switch and the second switch.

[0013] As a preferred solution of the dynamic balancing test device of the present invention, wherein: the contactor is connected in series with the first power line and the control circuit.

[0014] As a preferred solution of the dynamic balancing test device of the present invention, wherein: the test electric cabinet further comprises a starting capacitor connected in parallel with the control circuit, and when the control circuit is started, the starting capacitor is connected in series with the control circuit;

[0015] It also includes a motor winding connected in parallel with the control loop. When the control loop is running, the motor winding is connected in series with the control loop.

[0016] As a preferred solution of the dynamic balancing test device of the present invention, wherein: the motor winding is connected in series with the motor rotor, and the motor rotor is connected in parallel with the second power line.

[0017] Another object of the present invention is to provide a measurement method for use in a dynamic balancing test device, comprising: installing a fan on a fixed frame; pressing a first switch to start a control circuit; observing amplitude data transmitted by a vibration sensor; pressing a second switch to stop the control circuit; adding a balancing block according to the amplitude data to adjust the balance point.

[0018] As a preferred solution of the measuring method of the present invention, after starting the fan, it is necessary to wait for the rotation speed to stabilize before reading the data to determine the imbalance between the left and right sides.

[0019] As a preferred solution of the measuring method of the present invention, after adding the balancing block, the above measuring method is repeated until the unbalance is eliminated.

[0020] The beneficial effects of the present invention are:

[0021] 1. This technical solution improves the maintenance process of the fan through a dedicated dynamic balancing test machine.

[0022] 2. Through precise dynamic balancing test, the vibration problem of the fan during operation can be eliminated and the stability and reliability of the fan can be improved.

[0023] 3. By repairing rather than scrapping fans that exceed the vibration standard, you can save the cost of purchasing new fans.

[0024] 4. This solution improves the quality of control circuit maintenance, extends the service life of the fan, and reduces resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0026] Figure 1 This is a scene diagram of the dynamic balance test device.

[0027] Figure 2 The circuit diagram of the control components of the dynamic balancing test device. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] 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.

[0030] 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 is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0031] Example 1

[0032] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a dynamic balancing test device, which includes an installation component 100 and a control component 200. The installation component 100 is used to install and fix the fan, and the control component 200 is used to collect data and control the start and stop of the fan.

[0033] Specifically, the mounting assembly 100 can be used to fix and install the fan.

[0034] Preferably, the control assembly 200 includes a test electric cabinet 201 disposed on one side of the mounting assembly 100 and a vibration sensor 202 fixedly mounted on the mounting assembly 100;

[0035] The test cabinet 201 controls the start and stop of the fan and receives the signal from the vibration sensor 202

[0036] When in use, the vibration sensor 202 fixed on the measuring bracket 102 transmits the unbalanced amount of the upper and lower sides of the fan to the electrical measuring system, and measures the position and mass of the fan unbalanced amount.

[0037] Example 2

[0038] Reference Figure 2 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0039] Specifically, the mounting assembly 100 includes a fixing frame 101 , a measuring bracket 102 and a dynamic balancing base 103 . The fixing frame 101 is fixedly connected to the measuring bracket 102 , and the measuring bracket 102 is disposed on the dynamic balancing base 103 .

[0040] Preferably, the vibration sensor 202 is fixedly mounted on the measuring bracket 102 .

[0041] Preferably, the test electric cabinet 201 includes a main circuit 201b for controlling the start and stop of the control circuit 201a, and the main circuit 201b is connected in series with the first power line L;

[0042] It also includes a main circuit 201b connected in parallel with the first switch 201a-1 and the second switch 201a-2. The main circuit 201b is used to control the start and stop of the control circuit.

[0043] Preferably, the main circuit 201b is connected in series with the first power line L and the control circuit 201a; the first power line L is the live line, and the second power line M is the neutral line.

[0044] Preferably, the test cabinet 201 further comprises a starting capacitor 201c connected in parallel with the control circuit 201a. When the control circuit 201a is started, the starting capacitor 201c is connected in series with the control circuit 201a. The starting capacitor 201c is used to provide additional phase shift when the control circuit is started so as to generate starting torque.

[0045] The motor winding 201d is connected in parallel with the control loop 201a. When the control loop 201a is running, the motor winding 201d is connected in series with the control loop 201a.

[0046] Preferably, the motor winding 201d is connected in series with the motor rotor 201e, and the motor rotor 201e is connected in parallel with the second power line M. The motor winding 201d is used to maintain the torque of the control loop when the control loop is running.

[0047] During use, when the first switch 201a-1 is pressed, the coil of the main circuit 201b is energized, the main circuit 201b is closed, the control circuit 201a is powered and starts to operate, and the starting capacitor 201c provides additional phase shift when the control circuit 201a starts, helping the control circuit 201a to generate sufficient starting torque. Once the control circuit 201a reaches a certain speed, the main circuit 201b may be disconnected, and the control circuit 201a continues to operate by relying on the motor winding 201d. The second switch 201a-2 is used to disconnect the circuit to stop the control circuit 201a from operating.

[0048] The motor rotor 201e is used to protect the circuit and prevent the back electromotive force generated when the control loop 201a is powered off from damaging other components.

[0049] Example 3

[0050] Reference Figure 2 , which is the third embodiment of the present invention, and is based on the first two embodiments.

[0051] Specifically, the fan is installed on the fixing frame 101;

[0052] Press the first switch 201a-1, and the control circuit 201a starts to operate;

[0053] Observe the amplitude data transmitted by the vibration sensor 202;

[0054] Press the second switch 201a-2, and the control circuit 201a stops running;

[0055] Add balance blocks according to the amplitude data and adjust the balance point.

[0056] Preferably, after starting the fan, it is necessary to wait until the speed is stable before reading the data to determine the imbalance between the left and right sides.

[0057] Preferably, after adding the balancing weight, the above measurement method is repeated until the unbalance is eliminated.

[0058] When in use, install the fan on the fixed frame 101, connect the fan power cord, start the test system, input the control loop 201a parameter value (rotation speed, weight, geometric dimensions of the installation balance block position), and determine the allowable imbalance; start the fan, and after the rotation speed stabilizes, read the imbalance of the left and right sides of the test system; press the stop button to stop the fan rotation, and after the fan stops steadily, add a balance block of calibrated weight to the displayed angle; until the test system displays that the fan imbalance is within the allowable range; stop the main power of the test system and disassemble the fan.

[0059] 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 dynamic balance test device, characterized in that: include, A mounting assembly (100) can be used to securely mount the fan; A control component (200) comprising a test electric cabinet (201) arranged on one side of the installation component (100) and a vibration sensor (202) fixedly mounted on the installation component (100); The test electric cabinet (201) controls the start and stop of the fan, and receives a signal from the vibration sensor (202).

2. The dynamic balancing test device according to claim 1, characterized in that: The mounting assembly (100) comprises a fixing frame (101), a measuring bracket (102) and a dynamic balancing base (103); the fixing frame (101) is fixedly connected to the measuring bracket (102); and the measuring bracket (102) is arranged on the dynamic balancing base (103).

3. The dynamic balancing test device according to claim 2, characterized in that: The vibration sensor (202) is fixedly mounted on the measurement bracket (102).

4. The dynamic balancing test device according to claim 3, characterized in that: The test electric cabinet (201) comprises a main circuit (201b) for controlling the start and stop of a control circuit (201a), and the main circuit (201b) is connected in series with a first power line (L); It also includes connecting the main circuit (201b) in parallel with the first switch (201a-1) and the second switch (201a-2).

5. The dynamic balancing test device according to claim 4, characterized in that: The main circuit (201b) is connected in series with the first power line (L) and the control circuit (201a).

6. The dynamic balancing test device according to claim 5, characterized in that: The test electric cabinet (201) further comprises a starting capacitor (201c) connected in parallel with the control circuit (201a); when the control circuit (201a) is started, the starting capacitor (201c) is connected in series with the control circuit (201a); It also includes a motor winding (201d) connected in parallel with the control loop (201a); when the control loop (201a) is in operation, the motor winding (201d) is connected in series with the control loop (201a).

7. The dynamic balancing test device according to claim 6, characterized in that: The motor winding (201d) is connected in series with the motor rotor (201e), and the motor rotor (201e) is connected in parallel with the second power line (M).

8. A measurement method, applied to the dynamic balancing test device according to claims 1 to 7, the method comprising: Install the fan on the fixing frame (101); Press the first switch (201a-1), and the control circuit (201a) starts to operate; observing amplitude data transmitted by a vibration sensor (202); When the second switch (201a-2) is pressed, the control circuit (201a) stops operating; Add balance blocks according to the amplitude data and adjust the balance point.

9. The measuring method according to claim 8, characterized in that: After starting the fan, you need to wait until the speed stabilizes before reading the data to determine the imbalance between the left and right sides.

10. The measuring method according to claim 9, characterized in that: After adding the balancing weight, repeat the above measurement method until the imbalance is eliminated.

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