A shielded pump bearing wear detection circuit and method

Abstract

The invention discloses a shielded pump bearing wear detection circuit and method. The detection circuit comprises a data acquisition module, a data processing module, a display module, a data transmission module for collecting shielded pump bearing wear information, and a host computer for predicting and analyzing the bearing wear amount according to the shielded pump bearing wear information and issuing a detection report. The data processing module is respectively connected to the data acquisition module, the display module and the data transmission module, and the host computer is connected to the data transmission module. The advantages of the invention are: a high degree of digital display, strong display mode and expansibility, real-time data reception and real-time display, real-time visual monitoring, prediction of bearing wear, and modular design. The circuit is in a weak current environment and does not need to be powered by three-phase electricity, thereby avoiding safety hazards. The entire detection circuit is conducive to the digital and intelligent development of shielded pumps.

Description

Technical Field

[0001] The invention relates to the field of shielded pump bearing detection, and more specifically to a shielded pump bearing wear detection circuit and method. Background Art

[0002] There are two ways to measure the wear of existing shielded pumps: radial wear pointer analog measuring instrument and simple bearing wear digital measuring instrument.

[0003] The pointer-type analog measuring device for radial wear of shielded pump is an analog pointer-type measurement and has not yet been digitized. It determines the forward and reverse rotation and the degree of wear based on the rotation speed and amount of the pointer. It cannot detect the phase loss of the three-phase voltage in real time, and the forward and reverse rotation cannot be monitored in real time. The wear degree measurement accuracy is not high and it cannot be displayed digitally. It is not convenient for direct remote intelligent control and is not conducive to the digitalization and intelligent development of shielded pumps.

[0004] The digital bearing wear measuring instrument uses a three-phase power line to draw power. It relies on a small high-voltage transformer to obtain DC power in a narrow space. Long-term use of the high-voltage transformer and the surrounding circuits poses a safety hazard. When the power line voltage fluctuates over a large range, it can damage the high-voltage transformer or even burn the measuring instrument, causing serious consequences. For shielded pumps that are widely used in the petrochemical industry, the safety hazard is even more prominent. In addition, the DC current obtained by the small transformer is relatively small, which is difficult to achieve for LCD display, multi-channel drive and 5G expansion. It is generally only displayed in the form of indicator lights, and the display method and scalability are poor. Therefore, the digital bearing wear measuring instrument is a simple digital measurement, with only a few LED lights to determine the amount of wear, and the low-voltage part draws power from the three-phase electricity, which poses a safety hazard and is not conducive to the digital and intelligent development of shielded pumps. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing shielded pump bearing wear detection method has a low degree of digitization, poor display mode and scalability, no visual monitoring, and cannot predict the amount of bearing wear. The low-voltage part draws power from three-phase electricity, which poses a safety hazard and is not conducive to the digital and intelligent development of the shielded pump.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A shielded pump bearing wear detection circuit includes a data acquisition module for collecting shielded pump bearing wear information, a data processing module, a display module, a data transmission module and a host computer for predicting and analyzing the bearing wear amount according to the shielded pump bearing wear information and issuing a detection report. The data processing module is respectively connected to the data acquisition module, the display module and the data transmission module, and the host computer is connected to the data transmission module.

[0008] Furthermore, the data acquisition module includes a resistor R1, a polarity capacitor C1, a capacitor C2, a detection diode Z1, a polarity capacitor C3 and a capacitor C4, one end of the resistor R1 is connected to one end of a sensor installed on a shielded pump bearing, the other end of the resistor R1 is respectively connected to the positive electrode of the polarity capacitor C1, one end of the capacitor C2 and the anode of the detection diode Z1, the negative electrode of the polarity capacitor C1 is grounded, the other end of the capacitor C2 is connected to the other end of the sensor, the cathode of the detection diode Z1 is respectively connected to the positive electrode of the polarity capacitor C3, one end of the capacitor C4 and the ADC sampling port of the data processing module, and the negative electrode of the polarity capacitor C3 and the other end of the capacitor C4 are both grounded.

[0009] Furthermore, the shielded pump bearing wear detection circuit also includes a power module, which supplies power to the entire detection circuit. The power module includes a polarity capacitor C5, a capacitor C6, sequentially numbered drive current sources B1 to B3, an isolation capacitor Y1, an isolation transformer GELI, a polarity capacitor C7, a capacitor C8, a polarity capacitor C9 and a capacitor C10. The positive electrode of the polarity capacitor C5, one end of the capacitor C6 and one end of the drive current source B3 are all connected to the power supply VIN. 24V, the negative electrode of the polar capacitor C5 and the other end of the capacitor C6 are grounded, the isolation transformer GELI includes a primary winding, a secondary first winding and a secondary second winding, one end of the primary winding is connected to the other end of the driving current source B3, the other end of the primary winding is connected to one end of the isolation capacitor Y1 and grounded, one end of the secondary first winding is connected to one end of the driving current source B1, the other end of the driving current source B1 is respectively connected to the positive electrode of the polar capacitor C7 and one end of the capacitor C8, the negative electrode of the polar capacitor C7 and the other end of the capacitor C8 are both connected to the other end of the secondary first winding and grounded, and one end of the capacitor C8 serves as the output port of the power supply 5V_OUT;

[0010] One end of the second winding on the secondary side is connected to one end of the driving current source B2, and the other end of the driving current source B2 is respectively connected to the positive electrode of the polarity capacitor C9 and one end of the capacitor C10, the negative electrode of the polarity capacitor C9 and the other end of the capacitor C10 are both grounded, one end of the capacitor C10 serves as the output port of the power supply 3.3V_OUT, and the other end of the second winding on the secondary side is connected to the other end of the isolation capacitor Y1 and grounded.

[0011] Furthermore, the data processing module includes a chip U1, sequentially numbered capacitors C11 to C13, a crystal oscillator Y2 and a resistor R2, the fifth pin of the chip U1 is respectively connected to one end of the crystal oscillator Y2 and one end of the capacitor C11, the sixth pin of the chip U1 is respectively connected to the other end of the crystal oscillator Y2 and one end of the capacitor C12, the other end of the capacitor C11 and the other end of the capacitor C12 are both grounded; the seventh pin of the chip U1 is connected to one end of the resistor R2 and one end of the capacitor C13, the other end of the capacitor C13 is grounded, and the other end of the resistor R2 is connected to the power supply VDD.

[0012] Further, the data transmission module includes a 485 interface chip J1, a diode D1, a diode D2, a diode D3 and a capacitor C14, a first pin of the 485 interface chip J1 is connected to the RXD port of the data processing module, a second pin of the 485 interface chip J1 is connected to the third pin and connected to the RE port of the data processing module, and a fourth pin of the 485 interface chip J1 is connected to the TXD port of the data processing module; an eighth pin of the 485 interface chip J1 is grounded through the capacitor C14, one end of the diode D1 is connected to the power supply VCC, one end of the diode D3 and one end of the diode D2 are both connected to the sixth pin of the 485 interface chip J1, the other end of the diode D1 is respectively connected to the seventh pin of the 485 interface chip J1 and the other end of the diode D3, the other end of the diode D2 is grounded, one end of the diode D3 serves as the external communication interface A, and the other end of the diode D3 serves as the external communication interface B.

[0013] Furthermore, the shielded pump bearing wear detection circuit also includes a zeroing module, which includes a zeroing switch S1 and sequentially numbered resistors R3 to R8, one end of the resistor R7, one end of the resistor R3 and one end of the resistor R5 are all connected to the power supply VIN, the other end of the resistor R7 is respectively connected to one end of the resistor R8 and the first pin of the zeroing switch S1, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and the second pin of the zeroing switch S1, the other end of the resistor R5 is respectively connected to one end of the resistor R6 and the third pin of the zeroing switch S1, the other end of the resistor R8, the other end of the resistor R4 and the other end of the resistor R6 are all grounded, and the fourth pin to the sixth pin of the zeroing switch S1 are respectively connected to an IO control port of the data processing module.

[0014] Furthermore, the display module includes a power status display unit and a wear display unit. Both the power status display unit and the wear display unit adopt a liquid crystal display screen and are connected to the display screen interface of the data processing module.

[0015] Furthermore, it also includes a shell, the detection circuit is encapsulated in the shell, and the surface of the shell is provided with three grooves which match the sizes of the power status display unit, the data acquisition module and the data transmission module respectively. The power status display unit, the data acquisition module and the data transmission module are respectively embedded in the corresponding grooves, and the surfaces of the power status display unit, the data acquisition module and the data transmission module are flush with the surface of the shell.

[0016] Furthermore, the shell is also provided with a plurality of positioning posts and a plurality of screw holes, and the positioning posts on the shell pass through the screw holes to fix the shell on the canned pump.

[0017] The present invention also provides a method for a shielded pump bearing wear detection circuit, the method comprising: a data acquisition module acquires sensor data of the shielded pump bearing and sends the data to a data processing module, the data processing module performs analog-to-digital conversion on the data and sends the data to a display module for display, and at the same time sends the analog-to-digital converted data to a host computer through a data transmission module, the host computer predicts and analyzes the bearing wear amount according to the received data and issues a detection report.

[0018] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0019] 1. The data acquisition module in the present invention collects sensor data of the shielded pump bearing and sends the data to the data processing module. The data processing module converts the data into digital data and then sends it to the display module for digital display. The data is received and displayed in real time. The digital display degree is high, and the display mode and scalability are strong. Visual real-time monitoring can be achieved, and the bearing wear can be predicted. In addition, a modular design is adopted. The circuit is in a weak current environment and does not need to be powered by three-phase electricity, thus avoiding safety hazards. The entire detection circuit is conducive to the digital and intelligent development of the shielded pump.

[0020] 2. The data acquisition module of the present invention realizes RC filtering through resistor R1, capacitor C1 and capacitor C2, realizes detection through detector diode Z1, and then filters again through capacitor C3 and capacitor C4, providing stable data for the system with strong anti-interference ability.

[0021] 3. The power module of the present invention uses a three-phase power line 380V high voltage and a 24V power supply for physical isolation, which is highly safe. The drive current can reach more than 1A after isolation and voltage stabilization using a 24V power input, which can simultaneously meet the needs of multi-channel acquisition, LCD display, data remote transmission, and function expansion.

[0022] 4. The zeroing module of the present invention can automatically adjust the initial state of bearing wear of each shielded pump to zero by adjusting the dial state through the three-way dial circuit connected to the front end of the zeroing switch S1, effectively solving the problem of inconsistent initial amount of bearing wear.

[0023] 5. The host computer of the present invention predicts and analyzes the wear amount, and uploads the monitoring data to the integrated control room or Internet platform. A test report is automatically generated at fixed intervals. The industrial software monitors and analyzes the entire life cycle of bearing wear, and can predict the approximate life of the bearing, so that the bearing can be replaced before the wear reaches a certain level, protecting the shielded pump from damage.

[0024] 6. The housing and functional display interface of the present invention are designed according to the structure of the canned motor pump and the characteristics of the system provided by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A structural block diagram of a shielded pump bearing wear detection circuit provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a data acquisition module in a shielded pump bearing wear detection circuit provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a power supply module in a shielded pump bearing wear detection circuit provided by an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of a data processing module in a shielded pump bearing wear detection circuit provided by an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of a data transmission module in a shielded pump bearing wear detection circuit provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of a zeroing module in a shielded pump bearing wear detection circuit provided by an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of a liquid crystal display screen in a shielded pump bearing wear detection circuit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of 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.

[0034] The present invention will be further described below in conjunction with the embodiments.

[0035] Example

[0036] like Figure 1 As shown, a shielded pump bearing wear detection circuit includes a data acquisition module 1 for collecting shielded pump bearing wear information, a data processing module 2, a display module 3, a data transmission module 4 and a host computer 5 for predicting and analyzing the bearing wear amount according to the shielded pump bearing wear information and issuing a detection report, the data processing module 2 is respectively connected to the data acquisition module 1, the display module 3 and the data transmission module 4, and the host computer 5 is connected to the data transmission module 4.

[0037] like Figure 2 As shown, the data acquisition module 1 includes a resistor R1, a polar capacitor C1, a capacitor C2, a detector diode Z1, a polar capacitor C3 and a capacitor C4, one end of the resistor R1 is connected to one end of the sensor installed on the shielded pump bearing, the other end of the resistor R1 is respectively connected to the positive electrode of the polar capacitor C1, one end of the capacitor C2 and the anode of the detector diode Z1, the negative electrode of the polar capacitor C1 is grounded, the other end of the capacitor C2 is connected to the other end of the sensor, the cathode of the detector diode Z1 is respectively connected to the positive electrode of the polar capacitor C3, one end of the capacitor C4 and the ADC sampling port of the data processing module 2, and the negative electrode of the polar capacitor C3 and the other end of the capacitor C4 are both grounded. RC filtering is achieved by resistor R1, capacitor C1 and capacitor C2, detection is achieved by detector diode Z1, and then filtering is performed again by capacitor C3 and capacitor C4, providing stable data for the system with strong anti-interference ability.

[0038] like Figure 3As shown, the shielded pump bearing wear detection circuit also includes a power module, which supplies power to the entire detection circuit. The power module includes a polarity capacitor C5, a capacitor C6, a sequentially numbered driving current source B1 to a driving current source B3, an isolation capacitor Y1, an isolation transformer GELI, a polarity capacitor C7, a capacitor C8, a polarity capacitor C9 and a capacitor C10. The positive electrode of the polarity capacitor C5, one end of the capacitor C6 and one end of the driving current source B3 are all connected to the power supply VIN 24V, the negative electrode of the polar capacitor C5 and the other end of the capacitor C6 are grounded, the isolation transformer GELI includes a primary winding, a secondary first winding and a secondary second winding, one end of the primary winding is connected to the other end of the driving current source B3, the other end of the primary winding is connected to one end of the isolation capacitor Y1 and grounded, one end of the secondary first winding is connected to one end of the driving current source B1, the other end of the driving current source B1 is respectively connected to the positive electrode of the polar capacitor C7 and one end of the capacitor C8, the negative electrode of the polar capacitor C7 and the other end of the capacitor C8 are both connected to the other end of the secondary first winding and grounded, and one end of the capacitor C8 serves as the output port of the power supply 5V_OUT;

[0039] One end of the secondary side second winding is connected to one end of the driving current source B2, and the other end of the driving current source B2 is respectively connected to the positive electrode of the polar capacitor C9 and one end of the capacitor C10, and the negative electrode of the polar capacitor C9 and the other end of the capacitor C10 are grounded, and one end of the capacitor C10 is used as the output port of the power supply 3.3V_OUT, and the other end of the secondary side second winding is connected to the other end of the isolation capacitor Y1 and grounded. The standard industrial power supply voltage 24V is input, and the 5V and 3.3V reference voltages are obtained after voltage transformation and voltage stabilization by the isolation transformer GELI, which provides a regulated power supply for each chip, and the isolation capacitor Y1 is added, the driving current can reach more than 1A, which can drive liquid crystal display, multi-channel drive and multi-function expansion, and has excellent expansion performance.

[0040] like Figure 4 As shown, the data processing module 2 includes a chip U1, sequentially numbered capacitors C11 to C13, a crystal oscillator Y2 and a resistor R2, the fifth pin of the chip U1 is respectively connected to one end of the crystal oscillator Y2 and one end of the capacitor C11, the sixth pin of the chip U1 is respectively connected to the other end of the crystal oscillator Y2 and one end of the capacitor C12, the other end of the capacitor C11 and the other end of the capacitor C12 are both grounded; the seventh pin of the chip U1 is connected to one end of the resistor R2 and one end of the capacitor C13, the other end of the capacitor C13 is grounded, and the other end of the resistor R2 is connected to the power supply VDD.

[0041] like Figure 5As shown, the data transmission module 4 includes a 485 interface chip J1, a diode D1, a diode D2, a diode D3 and a capacitor C14, a first pin of the 485 interface chip J1 is connected to the RXD port of the data processing module 2, a second pin of the 485 interface chip J1 is connected to the third pin and connected to the RE port of the data processing module 2, and a fourth pin of the 485 interface chip J1 is connected to the TXD port of the data processing module 2; an eighth pin of the 485 interface chip J1 is grounded through the capacitor C14, one end of the diode D1 is connected to the power supply VCC, one end of the diode D3 and one end of the diode D2 are both connected to the sixth pin of the 485 interface chip J1, the other end of the diode D1 is respectively connected to the seventh pin of the 485 interface chip J1 and the other end of the diode D3, the other end of the diode D2 is grounded, one end of the diode D3 serves as the external communication interface A, and the other end of the diode D3 serves as the external communication interface B.

[0042] like Figure 6 As shown, the shielded pump bearing wear detection circuit also includes a zeroing module, which includes a zeroing switch S1 and sequentially numbered resistors R3 to R8, one end of the resistor R7, one end of the resistor R3 and one end of the resistor R5 are all connected to the power supply VIN, the other end of the resistor R7 is respectively connected to one end of the resistor R8 and the first pin of the zeroing switch S1, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and the second pin of the zeroing switch S1, the other end of the resistor R5 is respectively connected to one end of the resistor R6 and the third pin of the zeroing switch S1, the other end of the resistor R8, the other end of the resistor R4 and the other end of the resistor R6 are all grounded, and the fourth pin to the sixth pin of the zeroing switch S1 are respectively connected to an IO control port of the data processing module 2. The third pin of the zeroing switch S1 is in the ON position, and the first pin and the second pin are in the disconnected position. Normally, no toggling is required. If the wear and tear of a new bearing is displayed as a yellow light when it is initially used, move the second pin upwards, and move the first and third pins downwards at the same time, and adjust the initial value to zero in the green light zone; if the wear and tear of a new bearing is displayed as a red light when it is initially used, move the first pin upwards, and move the second and third pins downwards at the same time, and adjust the initial value to zero in the green light zone, thereby automatically adjusting the initial state of the shielded pump wear. After the zeroing switch S1 moves a certain pin, the display state of the wear display unit switches to red light, yellow light, green light, etc. The process can be achieved by setting a program in the data processing module 2.

[0043] The display module 3 includes a power status display unit and a wear display unit. Both the power status display unit and the wear display unit are LCD screens and are connected to the display screen interface of the data processing module 2. The schematic diagram of the LCD screen is shown in FIG. Figure 7As shown. Taking the wear display unit as an example, the LCD displays two modes: normal and dangerous. There are 6 scroll bars from left to right. Normal displays 1 to 5, and dangerous displays the 6th. When the scroll bar is in the normal position, the corresponding 3 green lights and yellow lights of the light strip are on. In the dangerous position, the corresponding red light of the light strip is on. The scroll bar gradually increases from 1 to 6, indicating that the degree of wear is gradually increasing. The green light area indicates that the degree of wear is small and can be used normally; the yellow light area indicates that there is a small amount of wear and it can still be used but you need to be cautious; the red light area indicates that the degree of wear is large and the bearing needs to be replaced.

[0044] The detection circuit of the present invention also includes a shell, and the detection circuit is encapsulated in the shell. The surface of the shell is provided with three grooves that match the sizes of the power status display unit, the data acquisition module 1, and the data transmission module 4, respectively. The power status display unit, the data acquisition module 1, and the data transmission module 4 are respectively embedded in the corresponding grooves, and the surfaces of the power status display unit, the data acquisition module 1, and the data transmission module 4 are flush with the surface of the shell. The shell is also provided with a plurality of positioning posts and a plurality of screw holes, and the positioning posts on the shell pass through the screw holes to fix the shell to the shielded pump. There is no special limitation on the structure of the shell, as long as the detection circuit can be encapsulated therein and fixed as a whole to the shielded pump.

[0045] The working process of the present invention is as follows: the data acquisition module 1 collects the sensor data of the shielded pump bearing and sends the data to the data processing module 2; the data processing module 2 performs analog-to-digital conversion on the data and sends it to the display module 3 for display; at the same time, the analog-to-digital converted data is sent to the host computer 5 through the data transmission module 4; the host computer 5 predicts and analyzes the bearing wear amount according to the received data and issues a detection report.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shielded pump bearing wear detection circuit, characterized in that: It includes a data acquisition module for collecting shielded pump bearing wear information, a data processing module, a display module, a data transmission module and a host computer for predicting and analyzing the bearing wear amount according to the shielded pump bearing wear information and issuing a test report. The data processing module is respectively connected to the data acquisition module, the display module and the data transmission module, and the host computer is connected to the data transmission module; the data acquisition module includes a resistor R1, a polar capacitor C1, a capacitor C2, a detector diode Z1, a polar capacitor C3 and a capacitor C4, one end of the resistor R1 is connected to one end of a sensor installed on the shielded pump bearing, the other end of the resistor R1 is respectively connected to the positive electrode of the polar capacitor C1, one end of the capacitor C2 and the anode of the detector diode Z1, the negative electrode of the polar capacitor C1 is grounded, the other end of the capacitor C2 is connected to the other end of the sensor, the cathode of the detector diode Z1 is respectively connected to the positive electrode of the polar capacitor C3, one end of the capacitor C4 and the ADC sampling port of the data processing module, and the negative electrode of the polar capacitor C3 and the other end of the capacitor C4 are both grounded.

2. A shielded pump bearing wear detection circuit according to claim 1, characterized in that: It also includes a power supply module, which supplies power to the entire detection circuit. The power supply module includes a polarity capacitor C5, a capacitor C6, sequentially numbered drive current sources B1 to B3, an isolation capacitor Y1, an isolation transformer GELI, a polarity capacitor C7, a capacitor C8, a polarity capacitor C9 and a capacitor C10. The positive electrode of the polarity capacitor C5, one end of the capacitor C6 and one end of the drive current source B3 are all connected to the power supply VIN24V, the negative electrode of the polarity capacitor C5 and the other end of the capacitor C6 are grounded, and the isolation transformer GELI includes a primary side Winding, a secondary first winding and a secondary second winding, one end of the primary winding is connected to the other end of the driving current source B3, the other end of the primary winding is connected to one end of the isolation capacitor Y1 and is grounded, one end of the secondary first winding is connected to one end of the driving current source B1, the other end of the driving current source B1 is respectively connected to the positive electrode of the polarity capacitor C7 and one end of the capacitor C8, the negative electrode of the polarity capacitor C7 and the other end of the capacitor C8 are both connected to the other end of the secondary first winding and are grounded, and one end of the capacitor C8 serves as the output port of the power supply 5V_OUT; One end of the second winding on the secondary side is connected to one end of the driving current source B2, and the other end of the driving current source B2 is respectively connected to the positive electrode of the polarity capacitor C9 and one end of the capacitor C10, the negative electrode of the polarity capacitor C9 and the other end of the capacitor C10 are both grounded, one end of the capacitor C10 serves as the output port of the power supply 3.3V_OUT, and the other end of the second winding on the secondary side is connected to the other end of the isolation capacitor Y1 and grounded.

3. A shielded pump bearing wear detection circuit according to claim 1, characterized in that: The data processing module includes a chip U1, sequentially numbered capacitors C11 to C13, a crystal oscillator Y2 and a resistor R2. The fifth pin of the chip U1 is respectively connected to one end of the crystal oscillator Y2 and one end of the capacitor C11, the sixth pin of the chip U1 is respectively connected to the other end of the crystal oscillator Y2 and one end of the capacitor C12, the other end of the capacitor C11 and the other end of the capacitor C12 are both grounded; the seventh pin of the chip U1 is connected to one end of the resistor R2 and one end of the capacitor C13, the other end of the capacitor C13 is grounded, and the other end of the resistor R2 is connected to the power supply VDD.

4. A shielded pump bearing wear detection circuit according to claim 1, characterized in that: The data transmission module includes a 485 interface chip J1, a diode D1, a diode D2, a diode D3 and a capacitor C14. The first pin of the 485 interface chip J1 is connected to the RXD port of the data processing module, the second pin of the 485 interface chip J1 is connected to the third pin and connected to the RE port of the data processing module, and the fourth pin of the 485 interface chip J1 is connected to the TXD port of the data processing module; the eighth pin of the 485 interface chip J1 is grounded through the capacitor C14, one end of the diode D1 is connected to the power supply VCC, one end of the diode D3 and one end of the diode D2 are both connected to the sixth pin of the 485 interface chip J1, the other end of the diode D1 is respectively connected to the seventh pin of the 485 interface chip J1 and the other end of the diode D3, the other end of the diode D2 is grounded, one end of the diode D3 serves as an external communication interface A, and the other end of the diode D3 serves as an external communication interface B.

5. A shielded pump bearing wear detection circuit according to claim 1, characterized in that: It also includes a zeroing module, which includes a zeroing switch S1 and sequentially numbered resistors R3 to R8, one end of the resistor R7, one end of the resistor R3, and one end of the resistor R5 are all connected to the power supply VIN, the other end of the resistor R7 is respectively connected to one end of the resistor R8 and the first pin of the zeroing switch S1, the other end of the resistor R3 is respectively connected to one end of the resistor R4 and the second pin of the zeroing switch S1, the other end of the resistor R5 is respectively connected to one end of the resistor R6 and the third pin of the zeroing switch S1, the other end of the resistor R8, the other end of the resistor R4, and the other end of the resistor R6 are all grounded, and the fourth pin to the sixth pin of the zeroing switch S1 are respectively connected to an IO control port of the data processing module.

6. A shielded pump bearing wear detection circuit according to claim 1, characterized in that: The display module includes a power status display unit and a wear display unit. Both the power status display unit and the wear display unit adopt liquid crystal display screens and are connected to the display screen interface of the data processing module.

7. A shielded pump bearing wear detection circuit according to claim 6, characterized in that: It also includes a shell, the detection circuit is encapsulated in the shell, and the surface of the shell is provided with three grooves that match the sizes of the power status display unit, the data acquisition module and the data transmission module respectively. The power status display unit, the data acquisition module and the data transmission module are respectively embedded in the corresponding grooves, and the surfaces of the power status display unit, the data acquisition module and the data transmission module are flush with the surface of the shell.

8. A shielded pump bearing wear detection circuit according to claim 7, characterized in that: The shell is also provided with a plurality of positioning posts and a plurality of screw holes, and the positioning posts on the shell pass through the screw holes to fix the shell on the canned pump.

9. A method for detecting bearing wear of a shielded pump according to any one of claims 1 to 8, characterized in that: The method comprises: a data acquisition module acquires sensor data of a shielded pump bearing and sends the data to a data processing module; the data processing module performs analog-to-digital conversion on the data and sends the data to a display module for display; and at the same time, the analog-to-digital converted data is sent to a host computer through a data transmission module; the host computer predicts and analyzes the bearing wear amount according to the received data and issues a test report.

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