A device for monitoring axial displacement of a shielded pump

Abstract

The present application relates to the technical field of monitoring devices, and in particular to an axial displacement monitoring device for a shielded pump, comprising a bearing outer ring, a bearing inner ring, a shielded pump transmission rod, a self-compensating and monitoring mechanism, and a transmission mechanism. The bearing outer ring is rotatably clamped at the axis of the bearing inner ring, the bearing inner ring is sleeved on the outside of the shielded pump transmission rod, an installation cavity is provided in the bearing outer ring, and the self-compensating and monitoring mechanism is provided in the installation cavity. The bearing outer ring and the bearing inner ring are combined to form a bearing structure, and the dynamic adjustment of the elastic elements inside the bearing ensures that the worn ball always maintains effective contact with the bearing inner ring to avoid the accumulation of axial displacement caused by the expansion of the gap. A micro sensor is integrated in the bearing to directly measure the displacement compensation amount and axial offset data, thereby improving the anti-interference ability. The linkage ring combination constitutes a displacement amplification lever mechanism, and the displacement / pressure dual signals are generated through mechanical linkage to cross-verify the data reliability.

Description

Technical Field

[0001] The present application relates to the technical field of monitoring devices, and in particular to an axial displacement monitoring device for a shielded pump. Background Art

[0002] With the continuous improvement of modern industrial automation, condition monitoring of various types of mechanical equipment has become a crucial component in ensuring the safe and stable operation of systems. In particular, in industries such as the chemical and petroleum industries, shielded pumps (SPMs) are widely used in the transmission of corrosive or hazardous liquids due to their efficient sealing properties. However, in practice, axial movement, caused by factors such as bearing wear and uneven rotor force, frequently occurs, posing a threat to the reliability of the entire system. Consequently, research into this phenomenon has gradually deepened, and various monitoring mechanisms have been developed to ensure the normal operation of equipment. These studies have not only promoted the application and promotion of new technologies but also greatly enhanced the economic and social benefits of enterprises. At the same time, the ability to accurately and rapidly capture the dynamic changes within SPMs has become a key issue that urgently needs to be overcome.

[0003] Currently, common practices in the industry include the following: First, installing a vibration sensor on the outside of the canned motor pump to collect the overall vibration signal and indirectly infer possible axial misalignment; second, using an eddy current probe to directly measure the relative distance between the rotor surfaces to obtain precise numerical results; and third, using the principle of ultrasonic reflection to calculate the time difference to determine the position offset of the target object. The first method is simple and easy, but its accuracy is limited and it is prone to external interference and misjudgment. The second method, while highly accurate, can cause component damage and increase maintenance costs due to long-term exposure to harsh operating conditions. The third method, while non-invasive, still faces problems such as poor adaptability to complex environments. As can be seen from the above, each method has certain limitations and cannot fully meet practical needs.

[0004] In related technologies, the existing shielded pump axial displacement monitoring methods generally have problems such as weak anti-interference ability, short service life or high cost, making it difficult to balance economy and practicality. In addition, some traditional technologies rely on regular manual inspections to detect problems, which obviously does not meet the requirements of modern unmanned factories. Summary of the Invention

[0005] In order to solve the problems that existing shielded pump axial displacement monitoring means generally have weak anti-interference ability, short service life or high cost, the present application provides a shielded pump axial displacement monitoring device.

[0006] The present application provides a canned motor pump axial displacement monitoring device that adopts the following technical solution:

[0007] A shielded pump axial displacement monitoring device, comprising:

[0008] A bearing outer ring, wherein the bearing inner ring is rotatably connected to the axis of the bearing outer ring, and the bearing inner ring is sleeved on the outside of the shielded pump transmission rod;

[0009] A self-compensating and monitoring mechanism, which is used for displacement self-compensation and real-time monitoring of axial displacement, and a mounting cavity is provided in the outer ring of the bearing, the self-compensating and monitoring mechanism is provided in the mounting cavity, and the self-compensating and monitoring mechanism includes a linkage ring, a sliding groove, a driven rod, a support rod, a ball and a micro sensor, the linkage ring is coaxially rotatably connected in the mounting cavity, the sliding groove is provided on the linkage ring, one end of the driven rod is slidably engaged in the sliding groove, the support rod is fixed to the other end of the driven rod, the ball is embedded and rollingly provided on the support rod at one end close to the axis of the linkage ring, and the ball rolls against the outer wall of the bearing inner ring, the micro sensor is provided on the peripheral wall of the linkage ring, and the micro sensor is used to directly measure the axial displacement of the bearing inner ring;

[0010] The transmission mechanism is used to drive the self-compensation and monitoring mechanism to be linked as a whole, and the transmission mechanism is arranged in the installation cavity and is located on one side of the linkage ring.

[0011] By adopting the above technical solution, the bearing structure is formed by combining the outer ring and the inner ring of the bearing, and the elastic elements inside the bearing are dynamically adjusted to ensure that the worn ball always maintains effective contact with the inner ring of the bearing, avoiding the accumulation of axial displacement due to the expansion of the gap, and integrating a micro sensor in the bearing to directly measure the displacement compensation amount and axial offset data, thereby improving the anti-interference ability. The linkage ring combination is combined to form a displacement amplification lever mechanism, and the displacement / pressure dual signals are generated through mechanical linkage to cross-verify the data reliability, and the false alarm rate is greatly reduced. The present invention systematically solves the reliability, cost and maintenance problems in the axial displacement monitoring of shielded pumps through the integration of mechanical structure innovation and intelligent monitoring technology, and provides a cost-effective solution for industrial equipment status monitoring.

[0012] Optionally, a limiting ring is coaxially fixed in the mounting cavity of the bearing outer ring, the limiting ring is located on one side of the linkage ring, and a strip groove perpendicular to the axial direction is provided on the limiting ring, and the support rod is slidably engaged in the strip groove.

[0013] By adopting the above technical solution, the support rod is limited by the limiting ring to enable it to slide in a directional manner.

[0014] Optionally, the driven rod and the support rod are detachably connected via screws, and the overall structure formed by the support rod and the ball combination is provided with a corresponding replacement component.

[0015] By adopting the above technical solution and utilizing a detachable and replaceable connection structure, the balls can be disassembled and replaced after being worn, thus avoiding replacement of the entire device and reducing economic losses.

[0016] Optionally, the transmission mechanism includes a transmission gear cylinder, a fixed rod and a transmission gear, the transmission gear cylinder is coaxially fixed on the side of the linkage ring away from the sliding groove, the fixed rod is fixed in the mounting cavity of the bearing outer ring, the transmission gear is rotatably connected to the fixed rod, the inner wall of the transmission gear cylinder is provided with a tooth groove, and the transmission gear is engaged with the tooth groove.

[0017] By adopting the above technical solution, the transmission gear drives the transmission gear cylinder to engage and link, thereby enabling the linkage ring to engage and link synchronously.

[0018] Optionally, the transmission mechanism further includes a driven gear, an adjusting rod and a driving gear, the driven gear is rotatably connected to the fixed rod and fixed to the transmission gear, the adjusting rod is rotatably connected in the mounting cavity, the driving gear is coaxially rotatably connected to the adjusting rod, and the driving gear is engaged with the driven gear.

[0019] By adopting the above technical solution, the rotation of the driving gear drives the driven gear to engage and link, and then the driven gear drives the transmission gear to rotate synchronously.

[0020] Optionally, the transmission mechanism further includes a ratchet ring and a pawl, wherein the ratchet ring is coaxially fixed to one side of the driving gear, and a ratchet is provided on the inner wall of the ratchet ring, and one end of the pawl is fixed to the adjusting rod, and the other end is in sliding contact with the ratchet.

[0021] By adopting the above technical solution, the pawl is brought into contact with the ratchet ring, so that when the adjusting rod rotates, the driving gear can be driven to rotate synchronously.

[0022] Optionally, the transmission mechanism further comprises a spring, one end of the spring close to the axis is engaged and locked with the adjusting rod, and the other end is sleeved on the fixing rod.

[0023] By adopting the above technical solution, the spring is used to generate elastic force, so that after the ball is worn, it can automatically drive the adjustment rod and other components to work synchronously, thereby enabling the ball to achieve self-compensating contact with the inner ring of the bearing.

[0024] Optionally, a strip-shaped notch is provided on the side wall of the adjusting rod, a through hole is provided through one end of the mainspring near the axis, a protrusion is provided on the inner wall of the through hole, and the protrusion is slidably engaged in the strip-shaped notch.

[0025] By adopting the above technical solution, the projection is used to limit the mainspring, and the notch is provided so that the mainspring can be replaced after its elastic force is weakened or disappears.

[0026] Optionally, the sliding groove has an arc-shaped structure, and a plurality of the sliding grooves are equidistantly arranged, and the plurality of sliding grooves are axially arranged along the linkage ring.

[0027] By adopting the above technical solution and utilizing the arc structure, when the linkage ring rotates, the driven rod can drive the support rod to slide under the limiting effect of the sliding groove.

[0028] Optionally, the transmission gear and the driving gear have the same diameter, and the overall structure of the tooth groove on the inner wall of the transmission gear cylinder is larger than the transmission gear.

[0029] By adopting the above technical solution and utilizing gear sets of different diameters, the overall output torque of the transmission mechanism is increased, thereby enabling the balls to firmly contact the inner ring of the bearing.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] The bearing structure is composed of a bearing outer ring and a bearing inner ring. Through the dynamic adjustment of the elastic element inside the bearing, the worn balls always maintain effective contact with the bearing inner ring, avoiding the accumulation of axial displacement caused by the expansion of the gap.

[0032] Utilize the micro sensor integrated in the bearing to directly measure the displacement compensation and axial offset data, thus improving the anti-interference capability.

[0033] A displacement amplification lever mechanism is formed by combining linkage rings, and displacement / pressure dual signals are generated through mechanical linkage. The reliability of the data is cross-verified, and the false alarm rate is greatly reduced. The present invention systematically solves the reliability, cost and maintenance problems in the axial displacement monitoring of shielded pumps through the integration of mechanical structure innovation and intelligent monitoring technology, providing a cost-effective solution for industrial equipment status monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the external overall connection structure of a shielded pump axial displacement monitoring device in this embodiment.

[0035] Figure 2 This is a schematic diagram of the separation structure of the bearing outer ring and the bearing inner ring in this embodiment.

[0036] Figure 3 Schematic diagram of the self-compensation and monitoring mechanism structure in this embodiment.

[0037] Figure 4 Schematic diagram of the connection structure of the limiting ring in this embodiment.

[0038] Figure 5 Schematic diagram of the support rod and its connection structure in this embodiment.

[0039] Figure 6 Schematic diagram of the transmission mechanism structure in this embodiment.

[0040] Figure 7 Schematic diagram of the mainspring and its overall connection structure in this embodiment.

[0041] Figure 8 Schematic diagram of the driving gear connection structure in this embodiment.

[0042] Description of reference numerals:

[0043] 1. Bearing outer ring; 2. Bearing inner ring; 3. Shielded pump transmission rod; 4. Self-compensation and monitoring mechanism; 41. Linkage ring; 42. Slide groove; 43. Driven rod; 44. Support rod; 45. Ball; 46. Micro sensor; 47. Limit ring; 5. Transmission mechanism; 51. Transmission gear cylinder; 52. Fixed rod; 53. Transmission gear; 54. Driven gear; 55. Adjustment rod; 56. Driving gear; 57. Ratchet ring; 58. Pawl; 59. Spring. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-8 This application is described in further detail.

[0045] An embodiment of the present application discloses a device for monitoring the axial displacement of a canned motor pump.

[0046] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] Reference Figure 1 and Figure 2A shielded pump axial displacement monitoring device includes a bearing outer ring 1, a bearing inner ring 2, a shielded pump transmission rod 3, a self-compensating and monitoring mechanism 4, and a transmission mechanism 5. The bearing outer ring 1 is rotatably clamped with the bearing inner ring 2 at its axis, and the bearing inner ring 2 is sleeved on the outside of the shielded pump transmission rod 3. A mounting cavity is provided in the bearing outer ring 1, and the self-compensating and monitoring mechanism 4 is provided in the mounting cavity. The transmission mechanism 5 is used to drive the self-compensating and monitoring mechanism 4 to work in a coordinated manner. The bearing outer ring 1 and the bearing inner ring 2 are combined to form a bearing structure. Through dynamic adjustment of the elastic elements inside the bearing, the worn ball always maintains effective contact with the bearing inner ring, avoiding the accumulation of axial displacement caused by the expansion of the gap. A micro sensor 46 is integrated in the bearing to directly measure the displacement compensation amount and axial offset data, thereby improving the anti-interference ability. Combined with the linkage ring 41, a displacement amplification lever mechanism is formed. Through mechanical linkage, displacement / pressure dual signals are generated to cross-verify the data reliability, significantly reducing the false alarm rate. By integrating mechanical structure innovation with intelligent monitoring technology, the present invention systematically solves the reliability, cost and maintenance problems in shielded pump axial displacement monitoring, providing a cost-effective solution for industrial equipment status monitoring.

[0048] Reference Figure 3 Specifically, the self-compensation and monitoring mechanism 4 includes a linkage ring 41, a sliding groove 42, a driven rod 43, a support rod 44, a ball 45 and a micro sensor 46. The linkage ring 41 is coaxially connected in the installation cavity, the sliding groove 42 is set on the linkage ring 41, one end of the driven rod 43 is slidably engaged in the sliding groove 42, the support rod 44 is fixed to the other end of the driven rod 43, and the ball 45 is embedded and rolled on the support rod 44 at one end close to the axis of the linkage ring 41, and the ball 45 rolls against the outer wall of the bearing inner ring 2. The micro sensor 46 is set on the peripheral wall of the linkage ring 41, and the micro sensor 46 is used to directly measure the axial displacement of the bearing inner ring 2.

[0049] Reference Figure 4 Specifically, in the embodiment of the present application, a limit ring 47 is coaxially fixed in the installation cavity of the bearing outer ring 1. The limit ring 47 is located on one side of the linkage ring 41, and a strip groove perpendicular to the axial direction is provided on the limit ring 47. The support rod 44 is slidably engaged in the strip groove, and the limit ring 47 is used to limit the support rod 44 so that it can slide in a directional manner.

[0050] Reference Figure 5 and Figure 6Specifically, in the embodiment of the present application, regarding the transmission mechanism 5, the transmission mechanism 5 includes a transmission gear cylinder 51, a fixed rod 52, a transmission gear 53, a driven gear 54, an adjusting rod 55 and a driving gear 56. The rotation of the driving gear 56 drives the driven gear 54 to engage and link, and then the driven gear 54 drives the transmission gear 53 to rotate synchronously, and the transmission gear 53 drives the transmission gear cylinder 51 to engage and link, so that the linkage ring 41 can be synchronized and linked.

[0051] The transmission gear cylinder 51 is coaxially fixed on the side of the linkage ring 41 away from the sliding groove 42, the fixed rod 52 is fixed in the mounting cavity of the bearing outer ring 1, the transmission gear 53 is rotatably connected to the fixed rod 52, the inner wall of the transmission gear cylinder 51 is provided with a tooth groove, the transmission gear 53 is engaged with the tooth groove, the driven gear 54 is rotatably connected to the fixed rod 52 and fixed to the transmission gear 53, the adjusting rod 55 is rotatably connected in the mounting cavity, the driving gear 56 is coaxially rotatably connected to the adjusting rod 55, and the driving gear 56 is engaged with the driven gear 54.

[0052] Reference Figure 7 and Figure 8 Regarding the transmission mechanism 5 in the embodiment of the present application, the transmission mechanism 5 also includes a ratchet ring 57, a pawl 58 and a spring 59. The pawl 58 is used to abut against the ratchet ring 57, so that when the adjusting rod 55 rotates, it can drive the driving gear 56 to rotate synchronously, and the spring 59 is used to generate elastic force, so that after the ball 45 is worn, it can automatically drive the adjusting rod 55 and other components to move synchronously, so that the ball 45 can achieve self-compensating abutment with the inner ring 2 of the bearing.

[0053] In the embodiment of the present application, the ratchet ring 57 is coaxially fixed on one side of the driving gear 56, and a ratchet is provided on the inner wall of the ratchet ring 57. One end of the pawl 58 is fixed on the adjusting rod 55, and the other end slides in contact with the ratchet. One end of the spring 59 close to the axis is engaged and locked with the adjusting rod 55, and the other end is sleeved on the fixed rod 52.

[0054] Specifically, in the embodiment of the present application, a strip-shaped slot is provided on the side wall of the adjusting rod 55, a through hole is provided through one end of the mainspring 59 near the axis, a protrusion is provided on the inner wall of the through hole, and the protrusion is slidably engaged in the strip-shaped slot. The protrusion is used to limit the mainspring 59, and the setting of the strip-shaped slot allows the mainspring 59 to be replaced after its elastic force is weakened or disappears.

[0055] In the embodiment of the present application, the sliding groove 42 has an arc-shaped structure, and multiple sliding grooves 42 are equidistantly arranged. The multiple sliding grooves 42 are arranged axially along the linkage ring 41. The arc-shaped structure is utilized so that when the linkage ring 41 rotates, the driven rod 43 can drive the support rod 44 to slide under the limiting action of the sliding groove 42.

[0056] The transmission gear 53 and the driving gear 56 have the same diameter. The overall structure of the inner wall tooth groove of the transmission gear cylinder 51 is larger than the transmission gear 53. The use of gear sets with different diameters can increase the overall output torque of the transmission mechanism 5, thereby enabling the ball 45 to firmly abut against the inner ring 2 of the bearing.

[0057] In the embodiment of the present application, regarding the driven rod 43, the driven rod 43 and the support rod 44 are detachably connected by screws, and the overall structure composed of the support rod 44 and the ball 45 is provided with a corresponding replacement component. The detachable and replaceable connection structure allows the ball 45 to be removed and replaced after wear, thereby avoiding replacement of the entire device and reducing economic losses.

[0058] The implementation principle of the axial displacement monitoring device of a shielded pump in an embodiment of the present application is as follows: first, the bearing inner ring 2 is connected and locked with the shielded pump transmission rod 3, and then the adjusting rod 55 is rotated to wind up the mainspring 59, and the elastic force of the mainspring 59 drives the adjusting rod 55 to rotate in the opposite direction, and at the same time, the pawl 58 drives the ratchet ring 57 and the driving gear 56 to rotate, and the driving gear 56 drives the driven gear 54 to engage and link, and at the same time, the transmission gear 53 rotates, and the transmission gear 53 drives the transmission gear cylinder 51 to engage and link, and drives the linkage ring 41 to rotate through the transmission gear cylinder 51. At this time, the driven rod 43 drives the support rod 44 to move under the limiting action of the sliding groove 42, and makes the ball 45 abut against the bearing inner ring 2. During monitoring, the displacement compensation amount and axial offset data can be directly measured by the micro sensor 46.

[0059] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A canned motor pump axial displacement monitoring device, characterized in that: include: A bearing outer ring (1), wherein the bearing outer ring (1) is rotatably engaged with a bearing inner ring (2) at its axis, and the bearing inner ring (2) is sleeved on the outside of a shielded pump transmission rod (3); A self-compensating and monitoring mechanism (4) is provided for displacement self-compensation and real-time monitoring of axial displacement, and a mounting cavity is provided in the bearing outer ring (1), the self-compensating and monitoring mechanism (4) is provided in the mounting cavity, and the self-compensating and monitoring mechanism (4) comprises a linkage ring (41), a sliding groove (42), a driven rod (43), a support rod (44), a ball (45) and a micro sensor (46), the linkage ring (41) is coaxially rotatably connected in the mounting cavity, the sliding groove (42) is provided on the linkage ring (41), ... One end of the driven rod (43) is slidably engaged in the sliding groove (42), the support rod (44) is fixed to the other end of the driven rod (43), the ball (45) is embedded and rollingly arranged on the support rod (44) at one end close to the axis of the linkage ring (41), and the ball (45) is in rolling contact with the outer wall of the bearing inner ring (2), the micro sensor (46) is arranged on the peripheral wall of the linkage ring (41), and the micro sensor (46) is used to directly measure the axial displacement of the bearing inner ring (2); A transmission mechanism (5) is used to drive the self-compensation and monitoring mechanism (4) to move in linkage as a whole, and the transmission mechanism (5) is arranged in the installation cavity and located on one side of the linkage ring (41).

2. The canned motor pump axial displacement monitoring device according to claim 1, characterized in that: A limiting ring (47) is coaxially fixed in the mounting cavity of the bearing outer ring (1), the limiting ring (47) is located on one side of the linkage ring (41), and a strip-shaped notch perpendicular to the axial direction is provided on the limiting ring (47), and the support rod (44) is slidably engaged in the strip-shaped notch.

3. The canned motor pump axial displacement monitoring device according to claim 1, characterized in that: The driven rod (43) and the support rod (44) are detachably connected via screws, and the overall structure formed by the combination of the support rod (44) and the ball (45) is provided with a corresponding replacement component.

4. The canned motor pump axial displacement monitoring device according to claim 1, characterized in that: The transmission mechanism (5) comprises a transmission gear cylinder (51), a fixing rod (52) and a transmission gear (53); the transmission gear cylinder (51) is coaxially fixed to a side of the linkage ring (41) away from the sliding groove (42); the fixing rod (52) is fixed in the mounting cavity of the bearing outer ring (1); the transmission gear (53) is rotatably connected to the fixing rod (52); the inner wall of the transmission gear cylinder (51) is provided with a tooth groove, and the transmission gear (53) is engaged with the tooth groove.

5. The canned motor pump axial displacement monitoring device according to claim 4, characterized in that: The transmission mechanism (5) further comprises a driven gear (54), an adjusting rod (55) and a driving gear (56), wherein the driven gear (54) is rotatably connected to the fixing rod (52) and fixed to the transmission gear (53), the adjusting rod (55) is rotatably connected in the mounting cavity, the driving gear (56) is coaxially rotatably connected to the adjusting rod (55), and the driving gear (56) is meshed with the driven gear (54).

6. The canned motor pump axial displacement monitoring device according to claim 5, characterized in that: The transmission mechanism (5) further comprises a ratchet ring (57) and a pawl (58), wherein the ratchet ring (57) is coaxially fixed to one side of the driving gear (56), and ratchet teeth are provided on the inner wall of the ratchet ring (57), and one end of the pawl (58) is fixed to the adjusting rod (55), and the other end is in sliding contact with the ratchet teeth.

7. The canned motor pump axial displacement monitoring device according to claim 6, characterized in that: The transmission mechanism (5) further comprises a spring (59), one end of the spring (59) close to the axis is locked with the adjustment rod (55), and the other end is sleeved on the fixing rod (52).

8. The canned motor pump axial displacement monitoring device according to claim 7, characterized in that: A strip-shaped notch is provided on the side wall of the regulating rod (55); a through hole is provided through one end of the mainspring (59) near the axis; a protrusion is provided on the inner wall of the through hole; and the protrusion is slidably engaged in the strip-shaped notch.

9. The canned motor pump axial displacement monitoring device according to claim 1, characterized in that: The sliding groove (42) has an arc-shaped structure, and a plurality of the sliding grooves (42) are arranged at equal intervals, and the plurality of sliding grooves (42) are arranged axially along the linkage ring (41).

10. The canned motor pump axial displacement monitoring device according to claim 5, characterized in that: The transmission gear (53) and the driving gear (56) have the same diameter, and the overall structure of the tooth groove on the inner wall of the transmission gear cylinder (51) is larger than that of the transmission gear (53).

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