CN113203567B - Device and method for detecting abrasion of non-contact bearing of canned motor pump - Google Patents
Device and method for detecting abrasion of non-contact bearing of canned motor pump Download PDFInfo
- Publication number
- CN113203567B CN113203567B CN202110420041.6A CN202110420041A CN113203567B CN 113203567 B CN113203567 B CN 113203567B CN 202110420041 A CN202110420041 A CN 202110420041A CN 113203567 B CN113203567 B CN 113203567B
- Authority
- CN
- China
- Prior art keywords
- detection
- bearing
- pump
- detection probe
- transmission pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to the field of nondestructive testing equipment, in particular to a device and a method for detecting abrasion of a non-contact bearing of a canned motor pump. The detection device comprises: the device comprises an installation joint, a detection probe, a transmission pipe, a processing device and an adjustable bracket. The mounting joint is used for being detachably and fixedly connected with the tail end of the main shaft of the shielding pump; the inside of the installation joint is provided with a cylindrical detection cavity; the detection probe is positioned in a detection cavity of the installation joint; the detection probe contains a resonance induction circuit composed of a coil and a capacitor. The processing device comprises a signal generation module, a feedback signal sampling module and a data processing module; a signal cable electrically connected with the detection probe and the processing device is arranged in the transmission pipe; the adjustable bracket is fixedly connected to the processing device and used for adjusting and fixing the position of the combined body formed by the processing device, the transmission pipe and the detection probe. The device and the method can overcome the defects of poor reusability and insufficient detection precision of the traditional bearing monitor and realize nondestructive detection of the bearing of the shielding pump.
Description
Technical Field
The invention relates to the field of nondestructive testing equipment, in particular to a device and a method for detecting abrasion of a non-contact bearing of a canned motor pump.
Background
A canned pump is a sealless pump that seals both the pump body and the drive motor within a pressure vessel filled with a pumping medium. In the use process of the pump body, the pump body usually needs to run continuously for a long time, so that the requirements on weather resistance and service life of the shielding pump are high. The operation process of the pump body needs to be monitored in the use process of the shielding pump, and the fault of the pump body is discovered at the first time, so that the pump body is overhauled in time.
Bearing damage is a common type of failure of canned pumps due to damage between the main shaft and the bearings due to friction during long operation of the equipment. The coaxiality of the main shaft and the bearing can be influenced after the bearing is damaged, and for a high-speed running shielding pump main shaft, the phenomenon that the main shaft of the shielding pump swings or shifts due to the fact that the coaxiality of the bearing and the main shaft is insufficient, so that the safety of equipment of the main shaft and the shielding pump is possibly damaged, and abrasion of the bearing is aggravated; and may also have an impact on the load. It is therefore necessary to monitor the bearing wear of the operating canned motor pump.
Conventional bearing wear detection methods are accomplished by mechanical bearing monitors; the bearing monitor consists of a detection probe and a pressure gauge, and is matched with an end nut at the tail part of the rotor. The monitor is filled with gas, the probe contacts with the end nut and generates mutual friction, and the monitor detects the abrasion of the bearing through the change of the air pressure. However, the conventional mechanical bearing monitor has a complex structure, components are worn during use, the reusability of the equipment is poor, consumable materials are required to be replaced frequently, and meanwhile, the detection accuracy is also insufficient.
Disclosure of Invention
The invention provides a device and a method for detecting the abrasion of a non-contact bearing of a canned motor pump, which can overcome the defects of poor reusability and insufficient detection precision of the traditional bearing monitor.
The invention is realized by adopting the following technical scheme:
a shield pump contactless bearing wear detection device, the detection device comprising: the device comprises an installation joint, a detection probe, a processing device and a transmission pipe.
The mounting joint is used for being detachably and fixedly connected with the tail end of the main shaft of the shielding pump; the inside of the installation joint is provided with a cylindrical detection cavity; one end of the mounting joint is provided with a connecting sleeve for connecting the tail end of the rotating shaft of the shielding pump, the other end of the mounting joint is provided with a circular opening, the opening is communicated with the detection cavity, and the aperture of the opening is smaller than the inner diameter of the detection cavity; the mounting joint is made of magnetic permeability material.
The detection probe is positioned in a detection cavity of the installation joint; the detection probe is internally provided with a resonance induction circuit.
The processing device comprises a signal generation module, a feedback signal sampling module and a data processing module; the signal generation module is used for outputting detection signals to the resonance induction circuit so as to enable the periphery of the resonance induction circuit of the detection probe to generate an alternating magnetic field; the feedback signal sampling module is used for collecting feedback oscillation signals which are received at the detection probe and used for representing abrasion of the bearing; the data processing module is used for counting the received feedback oscillation signals and judging whether the bearing reaches the maximum allowable friction according to whether the number of the feedback oscillation signals acquired in unit time exceeds a critical value or not; the critical value is determined empirically, and when the bearing reaches the maximum allowable wear, the feedback signal sampling module samples the number of feedback oscillation signals in the corresponding unit time.
One end of the transmission pipe is detachably and fixedly connected with the detection probe, and the other end of the transmission pipe is detachably and fixedly connected with the processing device; a signal cable for electrically connecting the detection probe and the processing device is arranged in the transmission pipe.
Further, the detection device also comprises an adjustable bracket which is fixedly connected to the processing device; the adjustable bracket is used for adjusting and fixing the position of a combination body formed by the processing device, the transmission pipe and the detection probe, so that the initial position of the detection probe in the detection cavity of the installation joint is centered and adjusted, and the bottom surface of the adjustable bracket is provided with an installation foot which is fixedly connected with the installation base surface.
Further, the detection probe also comprises a first shell, wherein the first shell is in a cake shape, and the resonance induction circuit consists of a coil and a capacitor and is hermetically arranged in the first shell; a first threaded port for connecting a transmission pipe is arranged in the first shell; the first shell is prepared from a material with a low magnetic force line damping coefficient, high corrosion resistance and high structural strength; the processing device further includes a second housing; the signal generation module, the feedback signal sampling module and the data processing module are positioned in the second shell; the adjustable support is fixedly connected to the bottom of the second shell, and a second threaded opening for connecting the transmission pipe is formed in the side face of the second shell.
Further, both ends of the transmission pipe are provided with external threads, and both ends of the transmission pipe are detachably connected with the first threaded port and the second threaded port respectively.
Further, a shielding layer is arranged on the inner wall of the transmission pipe, and a signal cable in the transmission pipe is a shielding cable.
Further, the detection device also comprises an alarm device, and the alarm device receives the analysis result of the data processing module and sends out an alarm signal when the analysis result shows that the bearing is excessively worn.
Further, one end of the transmission pipe, which is close to the detection probe, is also provided with a centering auxiliary device, and the centering auxiliary device comprises a depth graduated scale arranged on the outer wall of the transmission pipe and a centering disc sleeved on the outer side of the transmission pipe; the outer diameter of the centering disc is smaller than the aperture of the opening in the mounting adapter.
Further, the signal generation module is powered by an alternating current power supply, and the signal generation module filters an electric signal of the alternating current power supply and converts the electric signal into the input of the resonance induction circuit.
Further, the signal generating module is powered by a direct current power supply, and the processing device also comprises a chargeable battery and a resonant inverter; the resonance inverter converts a direct current signal generated by the battery into an alternating current signal, and the signal generation module filters the alternating current signal and converts the alternating current signal into the input of the resonance induction circuit.
The invention also comprises a method for detecting the abrasion of the non-contact bearing of the canned motor pump, which is applied to the device for detecting the abrasion of the non-contact bearing of the canned motor pump; the detection method comprises the following steps:
s1: arranging a shield pump non-contact bearing abrasion detection device at the tail end of the shield pump, and pre-adjusting the position and the height of the detection device; the preconditioning process needs to ensure that the detection probe is not contacted with the inside of the detection cavity of the installation joint after the installation joint is connected with the tail end of the main shaft of the shielding pump;
s2: fixedly connecting a connecting sleeve of the mounting joint to the tail end of a main shaft of the shielding pump;
s3: fine-tuning the position of the detection device to ensure that the detection probe is kept in a centered state in a detection cavity of the installation joint;
the fine tuning process comprises the following steps:
s31: adjusting the distance between the processing device and the mounting joint by taking the alignment of the opening of the mounting joint and a standard line in the depth graduated scale as a standard, and completing the depth adjustment of the detection probe;
s32: the processing device is adjusted by an adjustable bracket by taking the coaxiality of the opening of the centering disc and the mounting joint as a standard
The horizontal position and the vertical height are arranged, so that the position centering adjustment of the detection probe and the detection cavity is completed;
s33: the detection device for completing the depth adjustment and the position centering adjustment is fixed at the installation position by the installation foot of the adjustable bracket
The base surface is provided with a plurality of holes;
s4: starting the operation of the shielding pump, and starting a non-contact bearing abrasion detection device of the shielding pump;
s5: in the operation process of the shield pump non-contact bearing abrasion detection device, a signal generation module outputs a detection signal to a resonance induction circuit through a cable, and an alternating magnetic field is generated around the resonance induction circuit in a detection probe; the feedback signal sampling module collects feedback oscillation signals received by the detection probe; the data processing module acquires the number of the feedback oscillation signals acquired by the feedback signal sampling module, obtains an analysis result of the abrasion condition of the bearing of the shielding pump according to the magnitude relation between the acquired number of the feedback oscillation signals and the critical value, and makes judgment according to the detection result:
(1) When the number of the collected feedback oscillation signals is smaller than a critical value, the analysis result of the data processing module shows that the abrasion value of the bearing is smaller than a safety threshold value, and the alarm device does not operate;
(2) When the number of the collected feedback oscillation signals is larger than a critical value, the analysis result of the data processing module shows that the abrasion value of the bearing is larger than or equal to a safety threshold value, the data processing module sends an instruction to the alarm device, and the alarm device operates to send an alarm signal.
The device and the method for detecting the abrasion of the non-contact bearing of the canned motor pump have the following beneficial effects:
1. the non-contact bearing wear detection device of the canned motor pump realizes accurate detection of the runout amount of the spindle of the canned motor pump through a non-contact detection method, is further used for judging the wear amount of the bearing of the canned motor pump, cannot wear the canned motor pump in the detection process, cannot influence the operation process of the canned motor pump, is a non-inductive type monitoring method, and is particularly suitable for being applied to equipment which needs continuous long-time operation of the canned motor pump.
2. The detection device adopts the resonance induction circuit to detect, a special electromagnetic induction sensor is formed between the detection probe and the detection cavity of the installation joint, the detection precision of the sensor is extremely high, the extremely small deviation of the main shaft of the shielding pump can be accurately measured, the physical quantity of the current displacement is converted into the electric quantity through the corresponding feedback signal sampling module, and the abrasion loss of the bearing is calculated and evaluated based on the acquired result by the data processing module, so that the defect of insufficient detection precision of the traditional mechanical bearing monitor is overcome.
3. Because the invention adopts a non-contact measurement scheme, the relative friction between the detection probe and the mounting joint does not occur in the use process, and each component in the bearing abrasion detection device does not generate abrasion; the reusability of the detection device is better, the service life of the equipment is greatly prolonged, and the use cost of the equipment is reduced.
Drawings
Fig. 1 is a schematic structural view of a shield pump contactless bearing wear detection device in this embodiment 1;
fig. 2 is a schematic diagram showing the modular connection of the shield pump contactless bearing wear detection device in this embodiment 1;
fig. 3 is a schematic structural view of a shield pump contactless bearing wear detection device in this embodiment 2;
fig. 4 is a schematic diagram showing the modular connection of the shield pump contactless bearing wear detection device in this embodiment 3;
fig. 5 is a schematic structural view of a transmission pipe and a fitting portion in the shield pump contactless bearing wear detection device in this embodiment 4;
FIG. 6 is a schematic diagram showing the modular connection of the contact-less bearing wear detection device of the canned motor pump in example 5;
fig. 7 is a flowchart of a detection method of the shield pump contactless bearing wear detection device in this embodiment 6;
marked in the figure as: 1. installing a joint; 2. a detection probe; 3. a transmission tube; 4. a processing device; 5. an adjustable bracket; 7. an alarm device; 10. a detection chamber; 11. connecting sleeves; 12. an opening; 21. a resonant induction circuit; 41. a signal generation module; 42. a feedback signal sampling module; 43. a data processing module; 44. a resonant inverter; 45. a battery; 51. a mounting foot; 61. centering the disk; 62. a depth scale.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a shield pump contactless bearing wear detection device, which includes: fitting 1, detection probe 2, transfer tube 3, and processing device 4 are installed.
The mounting joint 1 is used for being detachably and fixedly connected with the tail end of the main shaft of the shielding pump; the inside of the installation joint 1 is provided with a cylindrical detection cavity 10; one end of the installation joint 1 is provided with a connecting sleeve 11 for connecting the tail end of the rotating shaft of the shielding pump, the other end of the installation joint is provided with a circular opening 12, the opening 12 is communicated with the detection cavity 10, and the aperture of the opening 12 is smaller than the inner diameter of the detection cavity 10; the mounting joint 1 is made of magnetically permeable material.
The detection probe 2 is positioned in the detection cavity 10 of the installation joint 1; the size of the detection probe 2 is smaller than the size of the detection cavity 10; the detection probe 2 includes a resonance induction circuit 21 including a coil and a capacitor.
One end of the transmission pipe 3 is detachably and fixedly connected with the detection probe 2, and the other end of the transmission pipe is detachably and fixedly connected with a processing device 4; a signal cable for electrically connecting the detection probe 2 and the processing device 4 is provided in the transmission tube 3.
The processing device 4 comprises a signal generating module 41, a feedback signal sampling module 42, and a data processing module 43; the signal generating module 41 is configured to output a detection signal to the resonance sensing circuit 21 through a signal cable, so that the resonance sensing circuit 21 generates an alternating magnetic field around the detection probe 2; the feedback signal sampling module 42 is used for collecting a feedback oscillation signal representing the bearing wear received by the detection probe 2; the data processing module 43 is configured to count the feedback oscillation signal collected by the feedback signal sampling module 42 in a unit time, and compare the count value with a critical value representing the maximum allowable friction of the bearing, so as to obtain an analysis result of the wear condition of the bearing of the canned motor pump.
As shown in fig. 2, the working principle of the non-contact bearing wear detection device of the canned motor pump is as follows:
the detection device comprises a movable component and a fixed component. The movable assembly, i.e. the mounting joint 1, is connected to the tail end of the main shaft of the canned motor pump, so that the mounting joint 1 can rotate coaxially with the main shaft of the canned motor pump. The combination body formed by the detection probe 2, the transmission pipe 3 and the processing device 4 is a fixed component; the position of the detection probe 2 in the installation cavity of the installation joint 1 can be adjusted, so that the detection probe 2 is just positioned in the middle of the installation cavity in an initial state, the center line of the detection probe 2 and the center axis of the installation joint 1 are positioned on the same straight line, and the fixing component is fixed on a certain fixed installation base surface.
In this installed state, there is a uniform gap between the inspection probe 2 and the inspection chamber 10 in the installation adapter 1, and there is no contact therebetween. When the canned motor pump is operated and the detection device is operated, the mounting joint 1 rotates along with the canned motor spindle, the signal generator in the processing device 4 inputs an alternating current signal to the resonance induction circuit 21 in the detection probe 2, and the resonance induction circuit 21 generates an alternating magnetic field around the detection probe 2 under the excitation of the alternating current signal. In this state, the resonance induction circuit 21 in the detection probe 2 and the detection chamber 10 in the mounting joint 1 correspond to constitute a "sensor" that detects a change in inductance; the resonant frequency of the resonant induction circuit 21 is the oscillation frequency of the "sensor", and the magnitude of the oscillation frequency is determined by the capacitance and the coil inside the detection probe 2 and the detection cavity 10 of the installation joint 1.
The oscillation frequency of the "sensor" can be described by the model of the LC oscillation circuit as follows:
in the above formula, f represents the oscillation frequency of the sensor; l represents the inductance of the sensor; c represents the capacitance of the sensor, and the capacitance C in the resonant induction circuit 21 is a fixed capacitance.
During the detection process of the detection device of the present embodiment, the canned motor pump is operated. Theoretically, when the bearing is not worn, the main shaft of the canned motor pump rotates without offset according to the original concentricity, so that the rotation of the installation joint 1 is also without offset; and because the rest of the fixed components in the detection device are also fixed in position, no relative displacement is equivalent between the mounting joint 1 and the detection probe 2. At this time, L and C in the sensor are unchanged.
However, when the canned pump bearing rubs, the position of the rotor assembly changes, and the rotation process of the canned pump main shaft shifts. The mounting adapter 1 attached to the end of the spindle is also rotated with the spindle in an offset manner, and because the mounting adapter 1 attached to the end of the spindle is substantially equivalent to extending the length of the spindle, the magnitude of the rotational offset on the mounting adapter 1 is substantially more amplified.
In the foregoing case, once the wear amount of the bearing exceeds the threshold value, the runout amount during the rotation of the spindle is excessively large; the relative position of the detection cavity 10 and the detection probe 2 in the installation joint 1 is changed continuously; at this time, the inductance L of the "sensor" changes. In the state of wear of the bearing, the inductance L of the "sensor" is different when the maximum allowable wear is reached and when the maximum allowable wear is not reached; when the maximum allowable wear is reached, the inductance becomes large.
The feedback signal sampling module 42 in the processing means 4 sets a corresponding oscillation frequency when the maximum allowable wear of the bearing is reached and thereby measures a threshold value for the number of pulses per unit time of judgment. The oscillation frequency will generally be substantially greater when the maximum allowable wear is not reached. Meanwhile, the feedback signal sampling module 42 in the processing device 4 is configured to collect the feedback oscillation signal received at the detecting probe 2, in this embodiment, the data processing module 43 in the processing device 4 samples and counts the feedback oscillation signal sent according to the sampling result of the feedback signal sampling module 42 in a unit time; comparing the pulse number obtained in unit time with a pulse number critical value to determine whether the maximum allowable abrasion is obtained, so as to obtain an evaluation analysis result of the abrasion loss of the bearing; when the number of pulses exceeds a critical value, the bearing wear is considered to exceed the maximum allowable wear amount, and overhauling and maintenance are needed.
In this embodiment, the detection probe 2 further includes a first housing, where the first housing is in a shape of a cake, and the resonant induction circuit 21 is hermetically installed inside the first housing; a first threaded port for connecting the transmission pipe 3 is arranged in the first shell; the first housing is made of a material having a low magnetic flux damping coefficient, high corrosion resistance and high structural strength.
The first housing serves as a protective cover for the resonant induction circuit 21 in the test probe 2, so that the first housing generally needs to be made of a material with high corrosion resistance and high structural strength. Meanwhile, since the first housing is not yet capable of interfering with the magnetic field environment around the resonance induction circuit 21, the material of the first housing is required to have a first magnetic line damping coefficient. In this embodiment, the first housing is made of glass ceramic.
In this embodiment, the processing device 4 further includes a second housing; the signal generating module 41, the feedback signal sampling module 42 and the data processing module 43 are located inside the second housing; the side of the second housing is provided with a second threaded opening for connection of the transfer tube 3.
The second housing is mainly used as a protective housing of the signal generating module 41, the feedback signal sampling module 42 and the data processing module 43, so that metal or polymer materials and the like can be selected according to requirements, and the requirements of factors such as heat dissipation performance, shock resistance, corrosion resistance and production cost of the second housing in the actual application process are comprehensively considered.
In the embodiment, external threads are arranged at two ends of the transmission pipe 3, and two ends of the transmission pipe 3 are detachably connected with the first threaded port and the second threaded port respectively; the inner wall of the transmission pipe 3 is provided with a shielding layer, and the signal cable in the transmission pipe 3 is a shielding cable.
The function of the transfer tube 3 includes two aspects: on the one hand, as a structural connection between the processing device 4 and the detection probe 2, and on the other hand, as a container for mounting shielded cables between the signal generating module 41, the feedback signal sampling module 42 and the resonance sensing circuit 21 in the detection probe 2. The shielding layer of the transmission pipe 3 further improves the electromagnetic protection performance of the shielding cable, thereby improving the detection precision of the overhaul device.
The signal generating module 41 in this embodiment is powered by an ac power source, and the signal generating module 41 filters an electrical signal of the ac power source and converts the filtered electrical signal into an input of the resonant induction circuit 21. With this structure, the shield pump contactless bearing wear detection device of the present embodiment directly adopts alternating current to supply power, and the signal generation module 41 can convert the commercial power into a high-frequency alternating current signal to output, or directly use the high-frequency alternating current, as required.
Example 2
This example compares with example 1: in the embodiment, an adjustable bracket 5 is added, and the adjustable bracket 5 is fixedly connected to the processing device 4; the adjustable bracket 5 is used for adjusting and fixing the position of the combination body formed by the processing device 4, the transmission pipe 3 and the detection probe 2, so as to perform centering adjustment on the initial position of the detection probe 2 in the detection cavity 10 of the installation joint 1, and the bottom surface of the adjustable bracket 5 is provided with an installation foot 51 which is fixedly connected with the installation base surface.
The adjustable bracket is used to more conveniently adjust the position of the detection probe 2 in the detection cavity of the installation joint 1, so that the detection device is in the optimal detection state, and the most accurate detection result is obtained.
Example 3
This embodiment differs from embodiment 2 in that: as shown in fig. 4, the device for detecting the abrasion of the contact-free bearing of the canned motor pump in this example further comprises an alarm device 7, wherein the alarm device 7 receives the analysis result of the data processing module and sends out an alarm signal when the analysis result shows that the bearing is excessively abraded.
The alarm device 7 may be various devices such as a buzzer and a stroboscope, which can send out an alarm, when the processing device 4 determines that the abrasion loss of the bearing of the canned motor pump exceeds a threshold value, the alarm device 7 sends out an alarm signal, and the related operation and maintenance manager can receive the related fault condition at the first time and overhaul the canned motor pump according to the operation and maintenance requirement.
Example 4
This embodiment differs from embodiment 3 in that: as shown in fig. 5, in the device for detecting wear of a contact-free bearing of a canned motor pump according to the present embodiment, a centering auxiliary device is further disposed at one end of the transmission tube 3 near the detection probe 2, and the centering auxiliary device includes a depth scale 62 disposed on the outer wall of the transmission tube 3, and a centering disk 61 sleeved on the outer side of the transmission tube 3; the outer diameter of the central disk 61 is smaller than the aperture of the opening 12 in the mounting adapter 1.
As described in the principle of this type of detection device in embodiment 1, the product of this embodiment has strict requirements for the installation conditions of the apparatus. When the detection probe 2 has poor coaxiality and inaccurate position in the detection cavity 10 of the mounting joint 1 or relative displacement caused by the deflection of the rotating shaft of the non-shielding pump occurs, the final detection result is affected. Therefore, in order to ensure the accuracy in the installation process of the equipment, a centering auxiliary device is designed on the transmission pipe 3 in the embodiment.
Typically, each time the mounting is performed, the opening 12 of the mounting joint 1 is ensured to be positioned on the same scale of the depth scale 62, so that the depth of the detection probe 2 in the detection cavity 10 can be kept constant. And then the high concentricity of the middle circular disc 61 and the circular opening 12 of the mounting joint 1 is ensured, so that the high concentricity of the detection probe 2 and the detection cavity 10 can be maintained. This ensures that the detection results have a very high degree of accuracy.
The centering disc 61 is not used for blocking the opening 12 of the mounting joint 1, but is used for comparing with the opening 12 of the mounting joint 1, and is used as a reference object for being convenient for an operator to observe, thereby determining the coaxiality between the two during the mounting process.
Example 5
The difference between this embodiment and embodiment 4 is that: in this embodiment, as shown in fig. 6, the signal generating module 41 is powered by a dc power supply, and the processing device 4 further includes a rechargeable battery 45 and a resonant inverter 44; the resonant inverter 44 converts the dc signal generated by the battery 45 into an ac signal, and the ac signal is filtered by the signal generating module 41 and then converted into an input of the resonant induction circuit 21.
In this embodiment, since the battery 45 and the direct current are used for power supply, the product of this embodiment can have better adaptability, and the device itself can be charged without considering the problem of power connection. The requirements of the product of the embodiment on the installation conditions of equipment and an installation site are reduced.
Example 6
As shown in fig. 7, the present embodiment provides a detection method of a canned motor pump contactless bearing wear detection device, which is applied to the canned motor pump contactless bearing wear detection device of any one of embodiment 5; the detection method comprises the following steps:
s1: arranging a shield pump non-contact bearing abrasion detection device at the tail end of the shield pump, and pre-adjusting the position and the height of the detection device; the preconditioning process needs to ensure that the detection probe 2 is not contacted with the inside of the detection cavity 10 of the installation joint 1 after the installation joint 1 is connected with the tail end of the main shaft of the shielding pump;
s2: fixedly connecting a connecting sleeve 11 of the mounting joint 1 to the tail end of a main shaft of the shielding pump;
s3: fine-tuning the position of the detection device to ensure that the detection probe 2 is kept centered in the detection cavity 10 of the mounting joint 1;
the fine tuning process comprises the following steps:
s31: with the provision of keeping the opening 12 of the mounting adapter 1 aligned with a standard line in the depth scale 62
The distance between the processing device 4 and the mounting joint 1 is used for finishing the depth adjustment of the detection probe 2;
s32: the horizontal position and the vertical height of the processing device 4 are adjusted through the adjustable bracket 5 by taking the coaxiality of the centering disc 61 and the opening 12 of the mounting joint 1 as a standard, so that the position centering adjustment of the detection probe 2 and the detection cavity 10 is completed;
s33: the detection device for completing the depth adjustment and the position centering adjustment is fixed by the mounting feet 51 of the adjustable bracket 5
On the mounting base surface;
s4: starting the operation of the shielding pump, and starting a non-contact bearing abrasion detection device of the shielding pump;
s5: during the operation of the shield pump non-contact bearing wear detection device, the signal generation module 41 outputs a detection signal to the resonance induction circuit 21 through a cable, and the resonance induction circuit 21 generates an alternating magnetic field around the detection probe 2; the feedback signal sampling module 42 collects feedback oscillation signals which are received by the detection probe 2 and represent the abrasion of the bearing; the data processing module 43 obtains the number of the feedback oscillation signals collected by the feedback signal sampling module 42, processes the sampling result to obtain an analysis result of the abrasion condition of the bearing of the shielding pump, and makes a judgment according to the detection result:
(1) When the number of the collected feedback oscillation signals is smaller than a critical value, the analysis result of the data processing module shows that the abrasion value of the bearing is smaller than a safety threshold value, and the alarm device 7 does not operate;
(2) When the number of the collected feedback oscillation signals is larger than or equal to a critical value, the analysis result of the data processing module shows that the abrasion value of the bearing is larger than or equal to a safety threshold value, the data processing module sends an instruction to the alarm device 7, and the alarm device 7 operates to send an alarm signal.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A shield pump contactless bearing wear detection device, the detection device comprising:
the mounting joint is used for being detachably and fixedly connected with the tail end of the main shaft of the shielding pump; the inside of the installation joint is provided with a cylindrical detection cavity; one end of the mounting joint is provided with a connecting sleeve for connecting the tail end of the rotating shaft of the shielding pump, the other end of the mounting joint is provided with a circular opening, the opening is communicated with the detection cavity, and the aperture of the opening is smaller than the inner diameter of the detection cavity; the mounting joint is made of magnetic permeability materials;
the detection probe is positioned in the detection cavity of the mounting joint; a resonance induction circuit is arranged in the detection probe;
the processing device comprises a signal generation module, a feedback signal sampling module and a data processing module; the signal generation module is used for outputting detection signals to the resonance induction circuit so as to enable the periphery of the resonance induction circuit of the detection probe to generate an alternating magnetic field; the feedback signal sampling module is used for collecting feedback oscillation signals which are received at the detection probe and used for representing abrasion of the bearing; the data processing module is used for counting the received feedback oscillation signals and judging whether the bearing reaches the maximum allowable friction according to whether the number of the feedback oscillation signals acquired in unit time exceeds a critical value or not; the critical value is determined empirically, and when the bearing reaches the maximum allowable abrasion loss, the feedback signal sampling module obtains the number of corresponding feedback oscillation signals in unit time; and
one end of the transmission pipe is detachably and fixedly connected with the detection probe, and the other end of the transmission pipe is detachably and fixedly connected with the processing device; and a signal cable for electrically connecting the detection probe and the processing device is arranged in the transmission pipe.
2. The canned motor pump contactless bearing wear detection device according to claim 1, wherein: the detection device further comprises an adjustable bracket which is fixedly connected to the processing device; the adjustable support is used for adjusting and fixing the position of the combined body formed by the processing device, the transmission pipe and the detection probe, so that the initial position of the detection probe in the detection cavity of the installation joint is centered and adjusted, and the bottom surface of the adjustable support is provided with an installation foot fixedly connected with an installation base surface.
3. The canned motor pump contactless bearing wear detection device according to claim 2, wherein: the detection probe also comprises a first shell, wherein the first shell is in a round cake shape, and the resonance induction circuit consists of a coil and a capacitor and is hermetically arranged in the first shell; a first threaded port for connecting a transmission pipe is arranged in the first shell; the first shell is prepared from a material with a low magnetic force line damping coefficient, high corrosion resistance and high structural strength; the processing device further includes a second housing; the signal generation module, the feedback signal sampling module and the data processing module are positioned in the second shell; the adjustable support is fixedly connected to the bottom of the second shell, and a second threaded port for connecting the transmission pipe is formed in the side face of the second shell.
4. A canned motor pump contactless bearing wear detection device according to claim 3, wherein: external threads are arranged at two ends of the transmission pipe, and the two ends of the transmission pipe are detachably connected with the first threaded port and the second threaded port respectively.
5. The canned motor pump contactless bearing wear detection device according to claim 1, wherein: and a shielding layer is arranged on the inner wall of the transmission pipe, and a signal cable in the transmission pipe is a shielding cable.
6. The canned motor pump contactless bearing wear detection device according to claim 1, wherein: the detection device also comprises an alarm device, and the alarm device receives the analysis result of the data processing module and sends out an alarm signal when the analysis result shows that the bearing is excessively worn.
7. The canned motor pump contactless bearing wear detection device according to claim 1, wherein: the centering auxiliary device comprises a depth graduated scale arranged on the outer wall of the transmission pipe and a centering disc sleeved on the outer side of the transmission pipe; the outer diameter of the centering disc is smaller than the aperture of the opening in the mounting joint.
8. The canned motor pump contactless bearing wear detection device according to claim 1, wherein: the signal generation module is powered by an alternating current power supply, and the signal generation module filters an electric signal of the alternating current power supply and converts the electric signal into an input of the resonance induction circuit.
9. The canned motor pump contactless bearing wear detection device according to claim 1, wherein: the signal generation module is powered by a direct current power supply, and the processing device further comprises a chargeable battery and a resonant inverter; the resonance inverter converts a direct current signal generated by the battery into an alternating current signal, and the signal generation module filters the alternating current signal and converts the alternating current signal into the input of the resonance induction circuit.
10. A method for detecting abrasion of a non-contact bearing of a canned motor pump is characterized by comprising the following steps of: the detection method is applied to the shield pump contactless bearing wear detection device according to any one of claims 1 to 9; the detection method comprises the following steps:
s1: arranging a shield pump non-contact bearing abrasion detection device at the tail end of the shield pump, and pre-adjusting the position and the height of the detection device; the preconditioning process needs to ensure that the detection probe is not contacted with the inside of the detection cavity of the installation joint after the installation joint is connected with the tail end of the main shaft of the shielding pump;
s2: fixedly connecting a connecting sleeve of the mounting joint to the tail end of a main shaft of the shielding pump;
s3: fine-tuning the position of the detection device to ensure that the detection probe is kept in a centered state in a detection cavity of the installation joint;
the fine tuning process comprises the following steps:
s31: adjusting the distance between the processing device and the mounting joint by taking the alignment of the opening of the mounting joint and a standard line in the depth graduated scale as a standard, and completing the depth adjustment of the detection probe;
s32: the method comprises the steps that the alignment of the positions of the detection probes and the detection cavity is completed by taking the coaxiality of the alignment disc and an opening of the installation joint as a standard and adjusting the horizontal position and the vertical height of the processing device through an adjustable bracket;
s33: fixing the detection device which completes the depth adjustment and the position centering adjustment on a mounting base surface through mounting feet of the adjustable bracket;
s4: starting the operation of the shielding pump, and starting a non-contact bearing abrasion detection device of the shielding pump;
s5: in the operation process of the shield pump non-contact bearing abrasion detection device, a signal generation module outputs a detection signal to a resonance induction circuit through a cable, and an alternating magnetic field is generated around the resonance induction circuit in a detection probe; the feedback signal sampling module collects feedback oscillation signals received by the detection probe; the data processing module acquires the number of the feedback oscillation signals acquired by the feedback signal sampling module, obtains an analysis result of the abrasion condition of the bearing of the shielding pump according to the magnitude relation between the acquired number of the feedback oscillation signals and the critical value, and makes judgment according to the detection result:
(1) When the number of the collected feedback oscillation signals is smaller than a critical value, the analysis result of the data processing module shows that the abrasion value of the bearing is smaller than a safety threshold value, and the alarm device does not operate;
(2) When the number of the collected feedback oscillation signals is larger than a critical value, the analysis result of the data processing module shows that the abrasion value of the bearing is larger than or equal to a safety threshold value, the data processing module sends an instruction to the alarm device, and the alarm device operates to send an alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420041.6A CN113203567B (en) | 2021-04-19 | 2021-04-19 | Device and method for detecting abrasion of non-contact bearing of canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420041.6A CN113203567B (en) | 2021-04-19 | 2021-04-19 | Device and method for detecting abrasion of non-contact bearing of canned motor pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113203567A CN113203567A (en) | 2021-08-03 |
| CN113203567B true CN113203567B (en) | 2023-07-18 |
Family
ID=77027593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110420041.6A Active CN113203567B (en) | 2021-04-19 | 2021-04-19 | Device and method for detecting abrasion of non-contact bearing of canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113203567B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001304180A (en) * | 2000-04-26 | 2001-10-31 | Ebara Corp | Canned motor pump |
| CN108225772A (en) * | 2017-12-27 | 2018-06-29 | 合肥新沪屏蔽泵有限公司 | A kind of number shows bearing wear measuring instrument |
| CN108612658A (en) * | 2018-04-22 | 2018-10-02 | 大连理工大学 | A kind of fault detect prior-warning device for canned motor pump |
| CN111879517A (en) * | 2020-08-31 | 2020-11-03 | 合肥工业大学 | Device and method for detecting bearing abrasion in canned motor pump |
-
2021
- 2021-04-19 CN CN202110420041.6A patent/CN113203567B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001304180A (en) * | 2000-04-26 | 2001-10-31 | Ebara Corp | Canned motor pump |
| CN108225772A (en) * | 2017-12-27 | 2018-06-29 | 合肥新沪屏蔽泵有限公司 | A kind of number shows bearing wear measuring instrument |
| CN108612658A (en) * | 2018-04-22 | 2018-10-02 | 大连理工大学 | A kind of fault detect prior-warning device for canned motor pump |
| CN111879517A (en) * | 2020-08-31 | 2020-11-03 | 合肥工业大学 | Device and method for detecting bearing abrasion in canned motor pump |
Non-Patent Citations (1)
| Title |
|---|
| 屏蔽式智能矿用馈电状态传感器;黄春;;煤矿安全(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113203567A (en) | 2021-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103267637B (en) | Self-balancing motorized spindle comprehensive performance test platform | |
| CN113250976B (en) | Device and method for detecting and controlling radial runout of main shaft of canned motor pump and canned motor pump | |
| US4924180A (en) | Apparatus for detecting bearing shaft wear utilizing rotatable magnet means | |
| CN104007386A (en) | Comprehensive offline test platform of generator rotor insulation measurement device | |
| EP0025631A1 (en) | Piston position detector | |
| CN113203567B (en) | Device and method for detecting abrasion of non-contact bearing of canned motor pump | |
| CN113250975B (en) | Detection and control device and method for axial movement of main shaft of shield pump and shield pump | |
| CN105828952A (en) | Cone Crusher Shaft Position Measurement Sensor Arrangement | |
| KR101070789B1 (en) | Absolute vibration measuring equipment of portable shaft using casing vibration and relative vibration of shaft | |
| CN203443733U (en) | High-speed wire transmission cabinet cooling fan dynamic balance correcting apparatus | |
| CN109654990B (en) | Continuous oil pipe wall thickness online measurement probe based on pulse ACFM | |
| CN113236580B (en) | Self-driven sensing device for measuring rotating speed of main shaft of shield pump | |
| CN110207874A (en) | A kind of experimental rig for probing into non-destructive testing residual stress | |
| CN115638717A (en) | Current vortex sensor probe capable of measuring self-vibration and measuring method thereof | |
| CN113266579B (en) | Shielding pump isolation sleeve burst protection method and device and shielding pump | |
| CN215070904U (en) | Shield pump block terminal and shield pump | |
| CN219284459U (en) | Eddy current sensor calibration device | |
| CN204404986U (en) | A kind of electronic installation for installing current vortex sensor probe | |
| EP0241013A2 (en) | Apparatus for detecting surface microdefects in a metal workpiece | |
| CN106053590B (en) | Magnetic suspension thrombus elasticity testing device | |
| CN220525116U (en) | Eddy current sensor detection device | |
| CN218723942U (en) | Detection apparatus for eccentric mass distance of eccentric block | |
| CN110823569A (en) | Bearing fault detection method | |
| CN111537061B (en) | Elevator traction motor vibration on-line detection system | |
| CN218847632U (en) | Transmission shaft fault detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |