Bearing isolator and pump

Abstract

The invention relates to the technical field of machine pump monitoring, in particular to a bearing isolator and a machine pump. The bearing isolator comprises a moving ring, a static ring, a voltage regulator and a monitoring sensor used for monitoring operating parameters of a pump. The moving ring is rotatably connected to the static ring, one of a magnet and a coil is arranged in the moving ring, the other of the magnet and the coil is arranged in the static ring, and the coil is electrically connected with the monitoring sensor through the voltage regulator; based on circumferential rotation of the movable ring relative to the static ring, the coil cuts a magnetic induction line of the magnet to generate voltage, and the voltage regulator can regulate parameters of the voltage so as to be suitable for monitoring the sensor. In the process that the movable ring rotates along with the rotating shaft, the coil, the magnet and the voltage regulator jointly form a power supply system for supplying power to the monitoring sensor, the monitoring sensor does not need to be supplied with power through an external power supply, it is avoided that a long power supply cable is arranged between the monitoring sensor and the external power supply, and then potential safety hazards are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of machine pump monitoring, and in particular to a bearing isolator and a machine pump. Background Art

[0002] At present, the monitoring of various operating data during the operation of the pump is mainly carried out through wired monitoring. In this wired monitoring method, the monitoring sensor is arranged at the preset position of the pump, and the power supply cable is arranged between the monitoring sensor and the external power supply. Due to the long distance between the monitoring sensor and the external power supply, the length of the power supply cable is long. However, in petrochemical sites with high explosion-proof requirements, long power supply lines are prone to increase safety hazards. Summary of the invention

[0003] The purpose of the present invention is to overcome the problem in the prior art that a long power supply cable is provided between a monitoring sensor and an external power supply, which easily increases potential safety hazards.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a bearing isolator on the one hand, which includes a moving ring, a stationary ring, a voltage regulator and a monitoring sensor for monitoring the operating parameters of a machine pump; the moving ring is rotatably connected to the stationary ring, the moving ring is provided with one of a magnet and a coil, the stationary ring is provided with the other of a magnet and a coil, and the coil is electrically connected to the monitoring sensor through the voltage regulator; wherein, based on the circumferential rotation of the moving ring relative to the stationary ring, the coil cuts the magnetic flux lines of the magnet to generate voltage, and the voltage regulator can adjust the parameters of the voltage to be suitable for the monitoring sensor.

[0005] In some embodiments, a magnet is disposed in the dynamic ring, a coil is disposed in the static ring, and a monitoring sensor and a voltage regulator are installed in the static ring.

[0006] In some embodiments, the stationary ring has a first shaft mounting hole for mounting the rotating shaft, an axial end of the stationary ring facing the moving ring is provided with a mounting groove, the mounting groove is connected to the first shaft mounting hole, and a coil is provided at the side wall of the mounting groove; the moving ring has a second shaft mounting hole for mounting the rotating shaft, an axial end of the moving ring facing the stationary ring is provided with a protrusion, the protrusion is rotatably mounted in the mounting groove, the second shaft mounting hole passes through the protrusion, and a magnet is provided at the circumferential side wall of the protrusion.

[0007] In some embodiments, the mounting groove and the protrusion are respectively configured to be cylindrical, and the center line of the mounting groove, the axis of the first shaft mounting hole, the center line of the protrusion and the axis of the second shaft mounting hole coincide.

[0008] In some embodiments, a first positioning groove surrounding the first axis mounting hole is provided on the groove side wall of the mounting groove, and a plurality of coils spaced apart around the first axis mounting hole are provided in the first positioning groove; a second positioning groove surrounding the second axis mounting hole is provided on the circumferential side wall of the protrusion, and a plurality of magnets spaced apart around the second axis mounting hole are provided in the second positioning groove.

[0009] In some embodiments, a side wall of the first shaft mounting hole is provided with a third positioning groove surrounding the first shaft mounting hole, and a first sealing ring is embedded in the third positioning groove.

[0010] In some embodiments, the end of the static ring facing away from the dynamic ring has a mounting portion for connecting to the housing of the machine pump, the first shaft mounting hole passes through the mounting portion, the mounting portion is configured to be cylindrical, the center line of the mounting portion coincides with the axis of the first shaft mounting hole, and a fourth positioning groove is provided on the circumferential side wall of the mounting portion, and a second sealing ring is embedded in the fourth positioning groove.

[0011] In some embodiments, a side wall of the second shaft mounting hole is provided with a fifth positioning groove surrounding the second shaft mounting hole, and a third sealing ring is embedded in the fifth positioning groove.

[0012] In some embodiments, there are multiple monitoring sensors, each of which is used to monitor a different operating parameter.

[0013] Another aspect of the present invention provides a machine pump, which includes a casing, a rotating shaft and the above-mentioned bearing isolator. The rotating shaft is rotatably installed in the casing, the rotating shaft has an extension portion extending from the casing, and the bearing isolator is installed on the extension portion.

[0014] The above technical solution of the present invention has the following beneficial effects:

[0015] When the moving ring rotates, the coil cuts the magnetic flux lines of the magnet, so that the coil generates voltage, and the voltage regulator can adjust the voltage so that the adjusted voltage can be applied to the monitoring sensor. After the monitoring sensor is powered on, it can monitor the operating status of the pump. Therefore, when the moving ring rotates with the shaft, the coil, magnet and voltage regulator together constitute a power supply system for the monitoring sensor. The monitoring sensor does not need to be powered by an external power supply, which avoids the need to set a long power supply cable between the monitoring sensor and the external power supply, thereby helping to reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional schematic diagram of a bearing isolator in one embodiment of the present invention;

[0017] Figure 2 It is a cross-sectional schematic diagram of the connection between the rotating shaft and the bearing isolator in one embodiment of the present invention.

[0018] Description of Reference Numerals

[0019] 1. Moving ring; 11. Magnet; 12. Second shaft mounting hole; 13. Protrusion; 14. Third positioning groove; 2. Stationary ring; 21. Coil; 22. First shaft mounting hole; 23. Mounting groove; 24. Mounting portion; 25. Fourth positioning groove; 26. Fifth positioning groove; 3. Rotating shaft; 4. Axial clamp. DETAILED DESCRIPTION

[0020] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention, rather than to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0021] like Figure 1 and Figure 2 As shown, the present invention provides a bearing isolator, which includes a dynamic ring 1, a static ring 2, a voltage regulator and a monitoring sensor for monitoring the operating parameters of a machine pump; the dynamic ring 1 is rotatably connected to the static ring 2, the dynamic ring 1 is provided with one of a magnet 11 and a coil 21, the static ring 2 is provided with the other of the magnet 11 and the coil 21, and the coil 21 is electrically connected to the monitoring sensor through the voltage regulator; wherein, based on the circumferential rotation of the dynamic ring 1 relative to the static ring 2, the coil 21 cuts the magnetic flux lines of the magnet 11 to generate a voltage, and the voltage regulator can adjust the parameters of the voltage to be suitable for the monitoring sensor.

[0022] Specifically, the dynamic ring 1 and the static ring 2 are both annular structures. One axial end of the static ring 2 is used to connect to the casing of the machine pump, and the other axial end of the static ring 2 is connected to the dynamic ring 1. One axial end of the dynamic ring 1 is connected to the static ring 2, and the other axial end of the dynamic ring 1 faces away from the static ring 2. The dynamic ring 1 is rotatably mounted on the static ring 2. When the static ring 2 is installed in the casing, the static ring 2 is fixed, and the dynamic ring 1 can rotate with the rotating shaft 3. Of course, the dynamic ring 1 and the static ring 2 can be connected by a sealing clamping structure common in the field, and the present invention will not elaborate on it here. The voltage regulator and the monitoring sensor are both common electronic devices in the field, and the present invention will not elaborate on their structures and principles. Preferably, the voltage regulator and the monitoring sensor can be installed in the static ring 2. The monitoring sensor can be a temperature sensor, a vibration sensor or a temperature sensor, etc., and the present invention does not limit it.

[0023] In this embodiment, when the moving ring 1 rotates, the coil 21 moves to cut the magnetic flux lines of the magnet 11, so that the coil 21 generates a voltage, and the voltage regulator can adjust the voltage so that the adjusted voltage can be applied to the monitoring sensor, and the monitoring sensor can monitor the operating status of the pump after being powered on. Therefore, in the process of the moving ring 1 rotating with the rotating shaft 3, the coil 21, the magnet 11 and the voltage regulator together constitute a power supply system for the monitoring sensor. The monitoring sensor does not need to be powered by an external power supply, which avoids the need to set a long power supply cable between the monitoring sensor and the external power supply, thereby helping to reduce safety hazards.

[0024] In addition, it should be noted that, as known to those skilled in the art, a first axial clamping portion is provided at one end of the stationary ring 2 facing the dynamic ring 1, and a second axial clamping portion is provided at one end of the dynamic ring 1 facing the stationary ring 2. The first axial clamping portion and the second axial clamping portion are connected by an axial clamping member 4, so that the stationary ring 2 and the dynamic ring 1 will not be axially separated, and the dynamic ring 1 can rotate circumferentially relative to the stationary ring 2. Of course, the clamping method between the stationary ring 2 and the dynamic ring 1 is not an improved content of the present invention, and the present invention will not elaborate on this.

[0025] In some embodiments, the voltage regulator is a common electronic device in the art. Specifically, the voltage regulator may include a rectifier and a step-down device, the rectifier may be a bridge rectifier, and the step-down device may be an LM2596 or LM2596S chip. The voltage is regulated by the rectifier and the step-down device and provided to the monitoring sensor. Of course, the voltage regulator may also include a filter device and an overvoltage protection device, etc., which are not limited by the present invention. In addition, a regulator installation chamber may be reserved on the static ring 2, and the voltage regulator may be installed and fixed in the regulator installation chamber.

[0026] In some embodiments of the present invention, a magnet 11 is disposed in the dynamic ring 1 , a coil 21 is disposed in the static ring 2 , and a monitoring sensor and a voltage regulator are installed in the static ring 2 .

[0027] Specifically, since the coil 21 is disposed in the stationary ring 2, the position of the coil 21 is fixed, and the coil 21 can be directly connected to the voltage regulator, which helps to simplify the structure of the entire bearing isolator. In some embodiments of the present invention, the stationary ring 2 has a first shaft mounting hole 22 for mounting the rotating shaft 3, and an axial end of the stationary ring 2 facing the moving ring 1 is provided with a mounting groove 23, the mounting groove 23 is connected to the first shaft mounting hole 22, and the groove side wall of the mounting groove 23 is provided with a coil 21; the moving ring 1 has a second shaft mounting hole 12 for mounting the rotating shaft 3, and an axial end of the moving ring 1 facing the stationary ring 2 is provided with a protrusion 13, the protrusion 13 is rotatably mounted in the mounting groove 23, the second shaft mounting hole 12 passes through the protrusion 13, and a magnet 11 is provided at the circumferential side wall of the protrusion 13.

[0028] Specifically, one axial end of the stationary ring 2 faces the moving ring 1, and the other axial end of the stationary ring 2 faces the housing of the pump. The mounting groove 23 is recessed from the end surface of the stationary ring 2 facing the moving ring 1 to the end surface of the stationary ring 2 facing away from the moving ring 1. One axial end of the moving ring 1 faces the stationary ring 2, and the other axial end of the moving ring 1 faces away from the stationary ring 2. The protrusion 13 extends from the end surface of the moving ring 1 facing the stationary ring 2 to the stationary ring 2, and the protrusion 13 is rotatably installed in the mounting groove 23. Of course, the shape of the protrusion 13 is adapted to the shape of the mounting groove 23. In the radial direction of the first shaft mounting hole 22 or the second shaft mounting hole 12, the circumferential side wall of the protrusion 13 and the groove side wall of the mounting groove 23 are opposite to each other, and a certain gap is retained between the two. In the axial direction of the first shaft mounting hole 22 or the second shaft mounting hole 12, the end face of the protrusion 13 and the groove bottom wall of the mounting groove 23 are opposite to each other, and a certain gap is retained between the two. Of course, the installation position of the coil 21 is adapted to the installation position of the magnet 11, so that the coil 21 can cut the position where the magnetic flux lines are most dense, thereby generating a voltage that meets the requirements. In addition, the protrusion 13 has a sufficient radial thickness, so installing the magnet 11 at the circumferential side wall of the protrusion 13 will not affect the overall structural strength of the dynamic ring 1; similarly, the groove wall of the installation groove 23 also has a sufficient radial thickness, so installing the coil 21 at the groove side wall of the installation groove 23 will not affect the overall structural strength of the static ring 2.

[0029] In some embodiments of the present invention, the mounting groove 23 and the protrusion 13 are respectively configured to be cylindrical, and the center line of the mounting groove 23, the axis of the first shaft mounting hole 22, the center line of the protrusion 13 and the axis of the second shaft mounting hole 12 coincide.

[0030] Specifically, during the rotation of the dynamic ring 1, a consistent gap is always maintained between the circumferential side wall of the protrusion 13 and the groove side wall of the mounting groove 23, and the center line of the mounting groove 23, the axis of the first shaft mounting hole 22, the center line of the protrusion 13 and the axis of the second shaft mounting hole 12 coincide with each other, which helps to ensure the stable operation of the dynamic ring 1.

[0031] In some embodiments of the present invention, a first positioning groove surrounding the first shaft mounting hole 22 is provided on the groove side wall of the mounting groove 23, and a plurality of coils 21 spaced apart around the first shaft mounting hole 22 are arranged in the first positioning groove; a second positioning groove surrounding the second shaft mounting hole 12 is provided on the circumferential side wall of the protrusion 13, and a plurality of magnets 11 spaced apart around the second shaft mounting hole 12 are arranged in the second positioning groove.

[0032] Specifically, the first positioning groove is recessed radially outward from the groove side wall of the mounting groove 23, the second positioning groove is recessed radially inward from the circumferential side wall of the protrusion 13, and the openings of the first positioning groove and the second positioning groove are opposite to each other. Preferably, the magnet 11 can be a bar magnet, all magnets 11 are oriented in the same direction so that all magnets 11 can generate magnetic flux lines in the same direction, and all magnets 11 are circumferentially spaced along the second shaft mounting hole 12. Preferably, the coil 21 is a copper wire wound into a cylindrical shape, the center line of the coil 21 extends radially along the first shaft mounting hole 22, all coils 21 are circumferentially spaced along the first shaft mounting hole 22, and all coils 21 are connected to a voltage regulator. During the rotation of the moving ring 1, all coils 21 can continuously cut the position where the magnetic flux lines are most dense, so that a voltage that can meet the use requirements is generated in the coil 21.

[0033] In some embodiments, a plurality of cylindrical coils 21 are embedded in the first positioning groove, and the center line of the coil 21 is consistent with the radial direction of the first shaft mounting hole 22. The radial side of the coil 21 can be stuck on the side wall of the first positioning groove, and the coil 21 can also be bonded to the side wall of the first positioning groove and the bottom wall of the first positioning groove by glue to prevent it from falling off. Of course, a cylindrical plastic cover plate can also be provided to close the opening of the first positioning groove to prevent the coil 21 from falling off.

[0034] In some embodiments, the coil 21 includes an input line and an output line. The output line of the first coil 21 is connected to the input line of the second coil 21, and the output line of the second coil 21 is connected to the input line of the third coil 21, and so on. And the input line of the first coil 21 and the output line of the last coil 21 are connected to the voltage regulator. In order to facilitate the connection between the coil 21 and the voltage regulator, some channels can be set in the static ring 2, and these channels are used to accommodate the lines between the coil 21 and the voltage regulator. Of course, the surface of these channels can be coated with an insulating layer, such as a rubber layer or an insulating paint layer, so as to insulate the static ring 2 from the power transmission circuit.

[0035] In some embodiments, a plurality of bar magnets are embedded in the second positioning groove, and the length direction of the bar magnets is consistent with the axial direction of the second shaft mounting hole 12. The bar magnets can be fixed in the second positioning groove by glue, or by interference fit to prevent the bar magnets from falling off. Of course, a cylindrical plastic cover plate can also be provided to close the opening of the second positioning groove to prevent the bar magnets from falling off.

[0036] In some embodiments of the present invention, a third positioning groove 14 surrounding the first shaft mounting hole 22 is formed on a side wall of the first shaft mounting hole 22 , and a first sealing ring is embedded in the third positioning groove 14 .

[0037] Specifically, the third positioning groove 14 is recessed radially outward from the side wall of the first shaft mounting hole 22, and the opening of the third positioning groove 14 faces the first shaft mounting hole 22. The third positioning groove 14 is annular, so an annular first sealing ring is embedded in the third positioning groove 14. Of course, the diameter of the first sealing ring is greater than the depth of the third positioning groove 14, so that the first sealing ring can extend a portion from the third positioning groove 14 to contact the rotating shaft 3, thereby forming a seal.

[0038] In some embodiments of the present invention, the end of the static ring 2 facing away from the dynamic ring 1 has a mounting portion 24 for connecting to the housing of the machine pump, the first shaft mounting hole 22 passes through the mounting portion 24, the mounting portion 24 is configured to be cylindrical, the center line of the mounting portion 24 coincides with the axis of the first shaft mounting hole 22, and a fourth positioning groove 25 is provided on the circumferential side wall of the mounting portion 24, and a second sealing ring is embedded in the fourth positioning groove 25.

[0039] Specifically, the fourth positioning groove 25 is recessed radially inward from the circumferential side wall of the mounting portion 24, and the opening of the fourth positioning groove 25 faces away from the first shaft mounting hole 22. The fourth positioning groove 25 is annular, so an annular second sealing ring is embedded in the fourth positioning groove 25. Of course, the diameter of the second sealing ring is greater than the depth of the fourth positioning groove 25, so that a portion of the second sealing ring can extend from the fourth positioning groove 25 to contact the housing of the machine pump, thereby forming a seal. Of course, along the axial direction of the first shaft mounting hole 22, a plurality of fourth positioning grooves 25 distributed at intervals can be set on the mounting portion 24, and a second sealing ring is set in each fourth positioning groove 25.

[0040] In some embodiments of the present invention, a side wall of the second shaft mounting hole 12 is provided with a fifth positioning groove 26 surrounding the second shaft mounting hole 12 , and a third sealing ring is embedded in the fifth positioning groove 26 .

[0041] Specifically, the fifth positioning groove 26 is recessed radially outward from the side wall of the second shaft mounting hole 12, and the opening of the fifth positioning groove 26 faces the second shaft mounting hole 12. The fifth positioning groove 26 is annular, so an annular third sealing ring is embedded in the fifth positioning groove 26. Of course, the diameter of the third sealing ring is greater than the depth of the fifth positioning groove 26, so that the third sealing ring can extend a portion from the fifth positioning groove 26 to contact the rotating shaft 3, thereby forming a seal.

[0042] In some embodiments of the present invention, there are multiple monitoring sensors, each of which is used to monitor different operating parameters. The monitoring sensor can also transmit various operating data to a display device to facilitate real-time monitoring by on-site personnel.

[0043] Specifically, the bearing isolator may include multiple sensors such as vibration sensors, temperature sensors, and oil sensors. For example, the vibration sensor may be arranged in an installation chamber reserved in the stationary ring 2, which is close to the first shaft installation hole 22, so as to facilitate the vibration sensor to monitor vibration data, which is conducive to evaluating the vibration level and judging the fault type. The vibration sensor may further adopt a velocity sensor, an acceleration sensor, or a displacement sensor. More preferably, the vibration sensor may adopt a three-axis acceleration sensor. For another example, the temperature sensor is installed in another installation chamber reserved in the stationary ring 2, which is also close to the first shaft installation hole 22. The temperature sensor can monitor the temperature of the machine pump operation. For another example, the oil sensor is installed on the side of the stationary ring 2 facing the dynamic ring 1. The oil sensor can monitor the quality change of the bearing box oil on the casing.

[0044] In some embodiments, a plurality of sensor installation chambers are provided at the radial outer edge of the stationary ring 2 , and each monitoring sensor is installed and fixed in a sensor installation chamber.

[0045] In some embodiments, a signal transmission device may also be provided on the static ring 2, and the signal transmission device may transmit the monitoring data to the cloud.

[0046] The present invention also provides a machine pump, which includes a casing, a rotating shaft 3 and the bearing isolator of the above embodiment, wherein the rotating shaft 3 is rotatably installed in the casing, the rotating shaft 3 has an extension portion extending from the casing, and the bearing isolator is installed on the extension portion.

[0047] In this embodiment, when the moving ring 1 rotates with the rotating shaft 3, the coil 21, the magnet 11 and the voltage regulator together constitute a power supply for the monitoring sensor. The monitoring sensor does not need to be powered by an external power supply, thereby avoiding the need to set a long power supply cable between the monitoring sensor and the external power supply, thereby helping to reduce safety hazards.

[0048] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the present invention to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A bearing isolator, It is characterized in that The invention comprises a moving ring (1), a stationary ring (2), a voltage regulator and a monitoring sensor for monitoring the operating parameters of a pump; the moving ring (1) is rotatably connected to the stationary ring (2); the moving ring (1) is provided with one of a magnet (11) and a coil (21); the stationary ring (2) is provided with the other of the magnet (11) and the coil (21); the coil (21) is electrically connected to the monitoring sensor via the voltage regulator; Wherein, based on the circumferential rotation of the moving ring (1) relative to the stationary ring (2), the coil (21) cuts the magnetic flux lines of the magnet (11) to generate voltage, and the voltage regulator can adjust the parameters of the voltage to be suitable for the monitoring sensor.

2. The bearing isolator according to claim 1, It is characterized in that The magnet (11) is arranged in the moving ring (1), the coil (21) is arranged in the stationary ring (2), and the monitoring sensor and the voltage regulator are installed on the stationary ring (2).

3. The bearing isolator according to claim 2, It is characterized in that The stationary ring (2) has a first shaft mounting hole (22) for mounting the rotating shaft (3); an axial end of the stationary ring (2) facing the moving ring (1) is provided with a mounting groove (23); the mounting groove (23) is communicated with the first shaft mounting hole (22); and the coil (21) is provided on the groove side wall of the mounting groove (23); The movable ring (1) has a second shaft mounting hole (12) for mounting a rotating shaft (3); an axial end of the movable ring (1) facing the stationary ring (2) is provided with a protrusion (13); the protrusion (13) is rotatably mounted in the mounting groove (23); the second shaft mounting hole (12) passes through the protrusion (13); and the magnet (11) is provided on the circumferential side wall of the protrusion (13).

4. The bearing isolator according to claim 3, It is characterized in that The mounting groove (23) and the protrusion (13) are respectively configured to be cylindrical, and the center line of the mounting groove (23), the axis of the first shaft mounting hole (22), the center line of the protrusion (13) and the axis of the second shaft mounting hole (12) coincide with each other.

5. The bearing isolator according to claim 3, It is characterized in that A first positioning groove surrounding the first shaft mounting hole (22) is provided on the groove side wall of the mounting groove (23), and a plurality of coils (21) are arranged in the first positioning groove and are spaced apart around the first shaft mounting hole (22); A second positioning groove surrounding the second shaft mounting hole (12) is provided on the circumferential side wall of the protrusion (13), and a plurality of magnets (11) spaced apart and distributed around the second shaft mounting hole (12) are arranged in the second positioning groove.

6. A bearing isolator according to any one of claims 3 to 5, It is characterized in that A third positioning groove (14) surrounding the first shaft mounting hole (22) is provided on the side wall of the first shaft mounting hole (22), and a first sealing ring is embedded in the third positioning groove (14).

7. A bearing isolator according to any one of claims 3 to 5, It is characterized in that The end of the stationary ring (2) facing away from the dynamic ring (1) has a mounting portion (24) for connecting to the housing of the pump, the first shaft mounting hole (22) passes through the mounting portion (24), the mounting portion (24) is arranged in a cylindrical shape, the center line of the mounting portion (24) coincides with the axis of the first shaft mounting hole (22), and a fourth positioning groove (25) is provided on the circumferential side wall of the mounting portion (24), and a second sealing ring is embedded in the fourth positioning groove (25).

8. A bearing isolator according to any one of claims 3 to 5, It is characterized in that A fifth positioning groove (26) surrounding the second shaft mounting hole (12) is provided on the side wall of the second shaft mounting hole (12), and a third sealing ring is embedded in the fifth positioning groove (26).

9. A bearing isolator according to any one of claims 3 to 5, It is characterized in that There are multiple monitoring sensors, and each monitoring sensor is used to monitor different operating parameters.

10. A pump, It is characterized in that It comprises a casing, a rotating shaft (3) and the bearing isolator described in any one of claims 1 to 9, wherein the rotating shaft (3) is rotatably installed in the casing, the rotating shaft (3) has an extension extending from the casing, and the bearing isolator is installed on the extension.

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