A disc motor transformer oil pump bearing life monitoring system and control method

Abstract

The present invention discloses a transformer oil pump device, aiming to provide a disc motor transformer oil pump bearing life monitoring system and a control method thereof, wherein a hole is drilled in a disc pump pivot and a vibration sensor is installed to monitor the wear degree of the disc pump bearing to reduce the damage to the impeller and the motor stator and rotor caused by the bearing wear. The key point of the technical solution is that a vibration sensor is installed on the inner wall of the rotating pivot, and the vibration sensor can detect the vibration of the rotating pivot during the operation of the oil pump. The signal processing terminal can generate a bearing wear data curve according to the vibration signal of the rotating pivot, so that when the vibration sensor detects that the trough of the current wear curve is greater than the set value, it is judged that the current bearing is seriously worn, the bearing is abnormally running, and staff are required to come for maintenance. The present invention is applicable to the technical field of transformer oil pump detection equipment.

Description

Technical Field

[0001] The present invention relates to a transformer oil pump device, and more particularly to a disc motor transformer oil pump bearing life monitoring system and a control method thereof. Background Art

[0002] Disc motor oil pumps are widely used in many fields such as electricity, industry, renewable energy and data centers. They have the advantages of stable and reliable operation, low noise, high efficiency, long service life and convenient maintenance. In the prior art, disc motor transformer oil pumps use bearings to support rotating parts. As the running time increases, the bearings may wear out, causing vibration and noise of the pump, affecting the stability of the equipment, reducing the life of the impeller and motor, thereby reducing the flow rate and head, and affecting the cooling efficiency.

[0003] At present, the Chinese patent application number CN200420012746.6 discloses a transformer oil pump with a monitoring function, which includes a motor stator and two tooth harmonic sensors with opposite motor properties arranged in the space of the motor stator at 180° to each other. The two tooth harmonic sensors are connected to the monitoring instrument in real time through wires, which can detect the wear state of the oil pump, thereby preventing failures and eliminating the failures as soon as possible or taking measures such as quitting operation to improve the safe operation level of large-scale power equipment. This solution only studies the motor stator and rotor, and does not take into account that the bearing balls and inner and outer rings have been greatly worn when the motor stator and rotor are offset, and there is a certain deviation in the detection of the motor life.

[0004] For another example, the Chinese invention patent with application number CN202311535062.8 discloses an online sensing device and evaluation method for the status of a large-capacity power transformer oil pump, which includes a disc motor and an oil pump. Electromagnets are fixed on the outer surfaces of the inlet and outlet of the oil pump, respectively. Four pressure sensors are fixed on the inner surfaces of the inlet and outlet of the oil pump corresponding to the positions of the electromagnets and their opposite positions. A flow sensor is also installed at the outlet of the oil pump. A speed sensor is installed on the disc motor shaft. Four distance measuring units are equidistantly installed on the upper surface of the disc motor casing. The axial offset and inclination of the impeller are monitored by the four distance measuring units. A laser generator and a laser receiver are installed on the inner surface of the oil pump casing to ensure the normal circulation of the oil circuit of the large-capacity power transformer and timely heat dissipation. The above scheme also does not take into account the inducing factor of bearing wear caused by the offset of the impeller and the stator and rotor of the motor. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a disc motor transformer oil pump bearing life monitoring system and a control method thereof, which drills a hole in the disc pump pivot and installs a vibration sensor to monitor the degree of wear of the disc pump bearing to reduce the damage to the impeller and the motor stator and rotor caused by bearing wear.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a disc motor transformer oil pump bearing life monitoring system, comprising a pump body, the pump body also comprising a fixed part and a rotating part, the fixed part is covered with a sealing sleeve on the outside, the rotating part is provided with a placement groove on the inside, a rotating pivot is provided in the placement groove, the rotating pivot and the rotating part are clearance-matched, a vibration sensor is provided between the rotating pivot and the rotating part, the vibration sensor is used to detect the vibration signal of the pump body when it is running, a wiring groove is also provided between the rotating pivot and the rotating part, a sensor wire is provided in the wiring groove, one end of the sensor wire is electrically connected to the vibration sensor, and the other end is electrically connected to the signal processing device.

[0007] The present invention is further configured as follows: a sealing groove is further provided at the connection between the sealing sleeve and the fixing portion, and a sealing gasket is provided in the sealing groove.

[0008] The present invention is further configured as follows: a mounting hole is also penetrated in the fixing portion, and the mounting hole is configured to be used for passing a wire at the rotating portion.

[0009] The present invention is further configured as follows: a mounting groove is further provided on a side of the fixing portion away from the rotating portion, a fixing bolt is provided in the mounting groove, and the fixing bolt is configured to fix the sealing sleeve and the fixing portion.

[0010] The present invention is further configured as follows: the signal processing device includes a signal conditioning circuit, a signal processing terminal electrically connected to the signal conditioning circuit, and a signal transmission structure arranged between the signal conditioning circuit and the signal processing terminal.

[0011] Preferably, the fixing bolt is further provided with a wire outlet hole, and the diameter of the wire outlet hole matches the width of the sensor wire.

[0012] The present application also provides a control method for a disk motor transformer oil pump bearing life monitoring system, the control method comprising the following steps: S1, installing the disk motor so that the vibration sensor can fit with the rotating pivot, and the vibration sensor is arranged in a wiring groove between the rotating pivot and the rotating part;

[0013] S2. Leading out a sensor wire from the vibration sensor, wherein the sensor wire is electrically connected to the signal processing device through a wiring groove, a mounting hole, and a wire outlet hole;

[0014] S3, start the device, and the oil pump continues to run for T time;

[0015] S4, within the T time period, the vibration sensor detects the vibration signal of the rotating pivot and transmits it to the signal conditioning circuit, the signal conditioning circuit converts the vibration signal of the rotating pivot into an analog signal and transmits the analog signal to the signal processing terminal through the signal transmission structure;

[0016] S5. The signal processing terminal records the current vibration curve trough, and records the current vibration curve trough as the original wear data curve of the bearing;

[0017] S7, the oil pump continues to run for T1 time. After T1 time period, the vibration sensor detects the vibration signal again and records the wear data curve of that time;

[0018] S8, the signal processing terminal compares the current wear data curve with the original wear data curve, and calculates the average wear amount during the operation according to the difference between the two data;

[0019] S9. When the vibration sensor detects that the trough of the vibration curve of the rotating pivot is X, the bearing cannot work, and the signal processing terminal calculates the remaining use time of the current disc pump according to the current trough of the vibration curve and the average wear amount.

[0020] Preferably, the control method further includes working condition detection during the operation of the oil pump, including the following steps: S10, the oil pump continues to operate, during which the vibration sensor continuously detects the vibration signal, and transmits the vibration signal to the signal processing terminal to obtain the current vibration curve trough as X1;

[0021] S11. The signal processing terminal compares X1 with X. If X1>X, it is determined that the current bearing is operating abnormally, the oil pump stops running and the staff is notified to come for maintenance. Otherwise, it is determined that the current bearing is operating normally, and the device continues to run and detect.

[0022] By adopting the above technical scheme, the beneficial effects are as follows: 1. By installing a vibration sensor on the inner wall of the rotating pivot, the vibration sensor can detect the vibration of the rotating pivot during the operation of the oil pump. Specifically, the vibration sensor is tightly fitted with the rotating pivot, so that the vibration sensor can easily detect the vibration of the rotating pivot with high detection accuracy. At the same time, the vibration data of the rotating pivot detected by the vibration sensor is transmitted to the signal processing terminal, and the signal processing terminal can generate a wear data curve of the bearing according to the vibration signal of the rotating pivot. Generally speaking, the more serious the wear of the rotating pivot, the larger the trough of the wear data curve of the bearing. By setting the limit value of the trough of the wear curve, when the vibration sensor detects that the trough of the current wear curve is greater than the set value, it is judged that the current bearing is seriously worn and the bearing is running abnormally, and staff is required to come for maintenance.

[0023] 2. Furthermore, in order to make the disc motor have higher stability and sealing during operation, a sealing sleeve is provided on the outer sleeve of the fixed part, a sealing groove is also provided in the sealing sleeve, a sealing gasket is provided in the sealing groove, and the sealing ring is configured to ensure the sealing of the fixed part to prevent oil leakage. At the same time, bolts for sealing are provided at both ends of the fixed part and the rotating part, so that the cavities inside the fixed part and the rotating part remain sealed. At the same time, the sealing sleeve is fixed to the fixed part by fixing bolts, the sealing sleeve is tightly connected to the fixed part, and the sealing effect is good.

[0024] 3. At the same time, in order to facilitate the installation of the vibration sensor inside the disc motor, the rotating pivot and the rotating part are clearance-matched, and the vibration sensor is arranged in the gap formed by the clearance-matching of the rotating pivot and the rotating part, so that the vibration sensor and the rotating pivot are tightly fitted, and the detection effect is good. At the same time, a sensor wire is provided at one end of the vibration sensor, and the sensor wire enters the fixed part through the wiring groove between the rotating pivot and the rotating part. The fixed part is penetrated by a mounting hole, and the mounting hole is used to pass the sensor wire at the rotating part. At the same time, since the signal processing device is arranged on the outside of the disc motor, the sensor wire needs to extend to the outside of the disc motor. By providing a wire outlet hole on the fixing bolt, the diameter of the wire outlet hole matches the width of the sensor wire. The sensor wire passes through the wire outlet hole and is electrically connected to the signal processing device. During the rotation of the disc motor, the sensor wire inside the disc motor can be effectively prevented from being entangled, and the fixing effect is good and the connection is stable.

[0025] 4. In addition, during the operation of the disc motor, the vibration sensor detects the vibration signal generated when the oil pump is running, and transmits the vibration signal to the signal processing terminal to generate a vibration curve. The vibration curve can intuitively reflect the current wear condition of the bearing. Specifically, the vibration curve is a wavy curve, and the difference between the maximum and minimum values ​​of the curve is the current wear state of the bearing. The larger the difference, the more serious the bearing wear. When the bearing wear reaches a certain value, the oil pump will be unusable. By setting the specified value of the trough of the vibration curve, when the signal processing terminal detects that the current trough of the vibration curve is greater than the set value, the current use state of the disc motor can be easily obtained, and the staff can be notified to maintain or replace the motor that does not meet the requirements, and the detection efficiency is high. Further, the signal processing terminal can calculate the average wear of the disc oil pump according to the wear data curve when the disc motor works for the first time and the wear data curve after a period of time, and calculate the remaining working time of the current disc oil pump based on the average wear of the disc oil pump, and can uniformly integrate the real-time data, historical data and working state of the disc oil pump, so as to facilitate the monitoring and operation of the staff, and the human-computer interaction effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A cross-sectional view of an embodiment of a disc motor transformer oil pump bearing life monitoring system and a control method thereof according to the present invention;

[0027] Figure 2 It is an overall control structure diagram of an embodiment of a disc motor transformer oil pump bearing life monitoring system and a control method thereof of the present invention;

[0028] Figure 3 It is a flow chart of a detection method of an embodiment of a disc motor transformer oil pump bearing life monitoring system and a control method thereof of the present invention;

[0029] Figure 4 It is a working condition detection flow chart of an embodiment of a disc motor transformer oil pump bearing life monitoring system and a control method thereof of the present invention;

[0030] Reference numerals in the figure: 1, pump body; 102, fixed part; 103, rotating part; 4, sealing sleeve; 5, placement groove; 6, rotating pivot; 7, vibration sensor; 8, wiring groove; 9, sensor wire; 10, sealing groove; 11, sealing gasket; 12, mounting hole; 13, mounting groove; 14, fixing bolt; 15, wire outlet hole. DETAILED DESCRIPTION

[0031] Reference Figures 1 to 4 The present invention further describes a disc motor transformer oil pump bearing life monitoring system and a control method embodiment thereof.

[0032] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0033] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0034] A disc motor transformer oil pump bearing life monitoring system includes a pump body 1, the pump body 1 also includes a fixed part 102 and a rotating part 103, the fixed part 102 is covered with a sealing sleeve 4 on the outside, the rotating part 103 is provided with a placement groove 5 on the inside, a rotating pivot 6 is provided in the placement groove 5, the rotating pivot 6 and the rotating part 103 are clearance-matched, a vibration sensor 7 is provided between the rotating pivot 6 and the rotating part 103, the vibration sensor 7 is used to detect vibration signals when the pump body 1 is running, a wiring groove 8 is also provided between the rotating pivot 6 and the rotating part 103, a sensor wire 9 is provided in the wiring groove 8, one end of the sensor wire 9 is electrically connected to the vibration sensor 7, and the other end is electrically connected to a signal processing device.

[0035] A sealing groove 10 is further provided at the connection between the sealing sleeve 4 and the fixing portion 102 , and a sealing gasket 11 is provided in the sealing groove 10 .

[0036] The fixing portion 102 is also provided with a mounting hole 12 therein, and the mounting hole 12 is configured to allow a wire at the rotating portion 103 to pass through.

[0037] A mounting groove 13 is further provided on a side of the fixing portion 102 away from the rotating portion 103 . A fixing bolt 14 is provided in the mounting groove 13 . The fixing bolt 14 is configured to fix the sealing sleeve 4 and the fixing portion 102 .

[0038] The signal processing device comprises a signal conditioning circuit, a signal processing terminal electrically connected to the signal conditioning circuit, and a signal transmission structure arranged between the signal conditioning circuit and the signal processing terminal.

[0039] Preferably, the fixing bolt 14 is further provided with a wire outlet hole 15 , and the diameter of the wire outlet hole 15 matches the width of the sensor wire 9 .

[0040] A vibration sensor 7 is installed on the inner wall of the rotating pivot 6, and the vibration sensor 7 can detect the vibration of the rotating pivot 6 during the operation of the oil pump. Specifically, the vibration sensor 7 is tightly fitted with the rotating pivot 6, so that the vibration sensor 7 can easily detect the vibration of the rotating pivot 6 with high detection accuracy. At the same time, the vibration data of the rotating pivot 6 detected by the vibration sensor 7 is transmitted to the signal processing terminal, and the signal processing terminal can generate a wear data curve of the bearing according to the vibration signal of the rotating pivot 6. Generally speaking, the more serious the wear of the rotating pivot 6 is, the larger the trough of the wear data curve of the bearing is. By setting the limit value of the trough of the wear curve, when the vibration sensor 7 detects that the trough of the current wear curve is greater than the set value, it is judged that the current bearing is seriously worn and the bearing is running abnormally, and staff is required to come for maintenance.

[0041] Furthermore, in order to ensure that the disc motor has higher stability and sealing during operation, the fixed part 102 is provided with a sealing sleeve 4, and a sealing groove 10 is also provided in the sealing sleeve 4. A sealing gasket 11 is provided in the sealing groove 10, and the sealing ring is configured to ensure the sealing of the fixed part 102 to prevent oil leakage. At the same time, bolts for sealing are provided at both ends of the fixed part 102 and the rotating part 103, so that the cavities inside the fixed part 102 and the rotating part 103 remain sealed. At the same time, the sealing sleeve 4 is fixed to the fixed part 102 by fixing bolts 14, and the sealing sleeve 4 is tightly connected to the fixed part 102, and the sealing effect is good.

[0042] At the same time, in order to facilitate the installation of the vibration sensor 7 inside the disc motor, the rotating pivot 6 and the rotating part 103 are clearance-matched, and the vibration sensor 7 is arranged in the gap formed by the clearance-matching of the rotating pivot 6 and the rotating part 103, so that the vibration sensor 7 and the rotating pivot 6 are tightly fitted, and the detection effect is good. At the same time, a sensor wire 9 is provided at one end of the vibration sensor 7, and the sensor wire 9 enters the fixed part 102 through the wiring groove 8 between the rotating pivot 6 and the rotating part 103. The fixed part 102 is penetrated by a mounting hole 12, and the mounting hole 12 is used to pass the sensor wire 9 at the rotating part 103. At the same time, since the signal processing device is arranged on the outside of the disc motor, the sensor wire 9 needs to extend to the outside of the disc motor. By providing a wire outlet hole 15 on the fixing bolt 14, the diameter of the wire outlet hole 15 matches the width of the sensor wire 9. The sensor wire 9 passes through the wire outlet hole 15 and is electrically connected to the signal processing device. During the rotation of the disc motor, the sensor wire 9 inside the disc motor can be effectively prevented from being entangled, and the fixing effect is good and the connection is stable.

[0043] The present application also provides a control method for a disk motor transformer oil pump bearing life monitoring system, the control method comprising the following steps: S1, installing the disk motor so that the vibration sensor can fit with the rotating pivot, and the vibration sensor is arranged in a wiring groove between the rotating pivot and the rotating part;

[0044] S2. Leading out a sensor wire from the vibration sensor, wherein the sensor wire is electrically connected to the signal processing device through a wiring groove, a mounting hole, and a wire outlet hole;

[0045] S3, start the device, and the oil pump continues to run for T time;

[0046] S4, within the T time period, the vibration sensor detects the vibration signal of the rotating pivot and transmits it to the signal conditioning circuit, the signal conditioning circuit converts the vibration signal of the rotating pivot into an analog signal and transmits the analog signal to the signal processing terminal through the signal transmission structure;

[0047] S5. The signal processing terminal records the current vibration curve trough, and records the current vibration curve trough as the original wear data curve of the bearing;

[0048] S7, the oil pump continues to run for T1 time. After T1 time period, the vibration sensor detects the vibration signal again and records the wear data curve of that time;

[0049] S8, the signal processing terminal compares the current wear data curve with the original wear data curve, and calculates the average wear amount during the operation according to the difference between the two data;

[0050] S9. When the vibration sensor detects that the trough of the vibration curve of the rotating pivot is X, the bearing cannot work, and the signal processing terminal calculates the remaining use time of the current disc pump according to the current trough of the vibration curve and the average wear amount.

[0051] Preferably, the control method further includes working condition detection during the operation of the oil pump, including the following steps: S10, the oil pump continues to operate, during which the vibration sensor continuously detects the vibration signal, and transmits the vibration signal to the signal processing terminal to obtain the current vibration curve trough as X1;

[0052] S11. The signal processing terminal compares X1 with X. If X1>X, it is determined that the current bearing is operating abnormally, the oil pump stops running and the staff is notified to come for maintenance. Otherwise, it is determined that the current bearing is operating normally, and the device continues to run and detect.

[0053] During the operation of the disc motor, the vibration sensor 7 detects the vibration signal generated when the oil pump is running, and transmits the vibration signal to the signal processing terminal to generate a vibration curve. The vibration curve can intuitively reflect the current wear condition of the bearing. Specifically, the vibration curve is a wavy curve. The difference between the maximum value and the minimum value of the curve is the current wear condition of the bearing. The larger the difference, the more serious the bearing wear. When the bearing wear reaches a certain value, the oil pump cannot be used. By setting the specified value of the trough of the vibration curve, when the signal processing terminal detects that the current trough of the vibration curve is greater than the set value, the current use status of the disc motor can be easily obtained, and the staff can be notified to maintain or replace the motor that does not meet the requirements, and the detection efficiency is high. Further, the signal processing terminal can calculate the average wear of the disc oil pump according to the wear data curve when the disc motor works for the first time and the wear data curve after a period of time, and calculate the remaining working time of the current disc oil pump based on the average wear of the disc oil pump, and can uniformly integrate the real-time data, historical data and working status of the disc oil pump, so as to facilitate the monitoring and operation of the staff, and the effect of human-computer interaction is good.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for a bearing life monitoring system of a disc motor transformer oil pump, comprising a pump body (1), wherein the pump body (1) further comprises a fixed part (102) and a rotating part (103), characterized in that: The fixed part (102) is sleeved with a sealing sleeve (4) on the outside, the rotating part (103) is provided with a placement groove (5) on the inside, a rotating pivot (6) is provided in the placement groove (5), the rotating pivot (6) and the rotating part (103) are clearance-matched, a vibration sensor (7) is provided between the rotating pivot (6) and the rotating part (103), the vibration sensor (7) is used to detect the vibration signal of the pump body (1) when it is running, and a wiring groove (8) is also provided between the rotating pivot (6) and the rotating part (103), a sensor wire (9) is provided in the wiring groove (8), one end of the sensor wire (9) is electrically connected to the vibration sensor (7), and the other end is electrically connected to the signal processing device; The control method comprises the following steps: S1, installing the disc motor so that the vibration sensor can fit with the rotating pivot, and the vibration sensor is arranged in the wiring groove between the rotating pivot and the rotating part; S2. Leading out a sensor wire from the vibration sensor, wherein the sensor wire is electrically connected to the signal processing device through a wiring groove, a mounting hole, and a wire outlet hole; S3, start the device, and the oil pump continues to run for T time; S4, within the T time period, the vibration sensor detects the vibration signal of the rotating pivot and transmits it to the signal conditioning circuit, the signal conditioning circuit converts the vibration signal of the rotating pivot into an analog signal and transmits the analog signal to the signal processing terminal through the signal transmission structure; S5. The signal processing terminal records the current vibration curve trough, and records the current vibration curve trough as the original wear data curve of the bearing; S7, the oil pump continues to run for T1 time. After T1 time period, the vibration sensor detects the vibration signal again and records the wear data curve of that time; S8, the signal processing terminal compares the current wear data curve with the original wear data curve, and calculates the average wear amount during the operation according to the difference between the two data; S9. When the vibration sensor detects that the trough of the vibration curve of the rotating pivot is X, the bearing cannot work, and the signal processing terminal calculates the remaining use time of the current disc pump according to the current trough of the vibration curve and the average wear amount.

2. The control method of a disc motor transformer oil pump bearing life monitoring system according to claim 1 is characterized in that: A sealing groove (10) is also provided at the connection between the sealing sleeve (4) and the fixing portion (102), and a sealing gasket (11) is provided in the sealing groove (10).

3. The control method of a disc motor transformer oil pump bearing life monitoring system according to claim 1 is characterized in that: The fixing portion (102) is also provided with a mounting hole (12) extending therethrough, and the mounting hole (12) is configured to be used for passing a sensor wire (9) at the rotating portion (103).

4. The control method of a disc motor transformer oil pump bearing life monitoring system according to claim 1 is characterized in that: A mounting groove (13) is also provided on a side of the fixing portion (102) away from the rotating portion (103), and a fixing bolt (14) is provided in the mounting groove (13). The fixing bolt (14) is configured to fix the sealing sleeve (4) and the fixing portion (102).

5. The control method of a disc motor transformer oil pump bearing life monitoring system according to claim 1 is characterized in that: The signal processing device comprises a signal conditioning circuit, a signal processing terminal electrically connected to the signal conditioning circuit, and a signal transmission structure arranged between the signal conditioning circuit and the signal processing terminal.

6. The control method of a disc motor transformer oil pump bearing life monitoring system according to claim 1 is characterized in that: The control method further includes working condition detection during the operation of the oil pump, including the following steps: S10, the oil pump continues to operate, during which the vibration sensor continuously detects the vibration signal, and transmits the vibration signal to the signal processing terminal to obtain the current vibration curve trough as X1; S11. The signal processing terminal compares X1 with X. If X1>X, it is determined that the current bearing is operating abnormally, the oil pump stops running and the staff is notified to come for maintenance. Otherwise, it is determined that the current bearing is operating normally, and the device continues to run and detect.

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