Dynamic seal detection device and method for rotating mechanism

Abstract

The invention relates to a dynamic seal detection device and method for a rotating mechanism. The motor comprises a stator part; the rotor part rotates relative to the stator part, and a rotating shaft connected to a motor is connected to the rotor part; the expansion part is annular and is arranged between the stator part and the rotor part; the plurality of position sensors are arranged between the stator component and the rotor component, and the detection end of each position sensor extends along the axial direction and is in contact with one axial end of the expansion component; the movable sealing ring is arranged between the stator component and the rotor component and is close to the expansion component; after the movable sealing ring loses efficacy, the expansion part can absorb liquid entering from the side of the movable sealing ring and expand so as to push the detection ends of the position sensors. Damage of liquid to the rotating mechanism is reduced, and safety and reliability of equipment are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotating devices, and in particular to a dynamic seal detection device and method for a rotating mechanism. Background Art

[0002] Rotary mechanisms are widely used. Generally speaking, a rotary mechanism can be understood as a mechanical device used to achieve rotary motion. Its core function is to achieve power transmission or perform work tasks through the cooperation between the fixed part (stator) and the rotating part (rotor). This mechanism is usually used in work scenarios that require continuous or periodic rotation.

[0003] The working environment of some rotating mechanisms is relatively harsh, and they often work in water and dusty environments. In order to prevent water seepage in the rotating mechanism, a dynamic sealing structure is installed between the rotating parts and the fixed parts of the rotating mechanism. This structure can effectively prevent external dust, liquids, impurities, etc. from entering the motor. However, long-term operation of the motor and some uncertain factors such as high temperature and high humidity may cause the dynamic sealing structure to fail.

[0004] Existing rotating mechanisms protect electrical components by wrapping the internal circuit boards with insulating glue. Although water and liquid impurities entering the steel sheets, sensors and other components inside the rotating mechanism will not cause immediate failure, long-term operation in a humid environment will cause rust on the components and sensor measurement deviations. Some rotating mechanisms work in a high-voltage environment and are prone to short-circuit failures after water ingress. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that liquid enters the interior of the rotating mechanism after the seal fails, thereby causing malfunction.

[0006] In order to solve the above technical problems, the present invention provides a dynamic seal detection device for a rotating mechanism, comprising: Stator components; a rotor component, the rotor component rotates relative to the stator component, and a rotating shaft connected to the motor is connected to the rotor component; an expansion component, which is annular and disposed between the stator component and the rotor component; A plurality of position sensors are disposed between the stator component and the rotor component, and a detection end of each of the position sensors extends axially and contacts one axial end of the expansion component; A dynamic sealing ring, disposed between the stator component and the rotor component and close to the expansion component; The expansion component can absorb the liquid entering from the side of the driven sealing ring and expand to push the detection end of each position sensor.

[0007] In one embodiment of the present invention, the plurality of position sensors are evenly distributed along the circumference of the rotor component.

[0008] In one embodiment of the present invention, four position sensors are provided.

[0009] In one embodiment of the present invention, the expansion component is made of an expansion material that can expand after absorbing liquid.

[0010] In one embodiment of the present invention, the expansion component is made of highly water-absorbent polymer, expanded rubber, expanded polyurethane foam or fiber-based water-absorbent material.

[0011] The present invention also provides a method for detecting a dynamic seal for a rotating mechanism, using the dynamic seal detection device for a rotating mechanism, the method comprising: A first calibration quantity, a second calibration quantity, a third calibration quantity, a fourth calibration quantity and a fifth calibration quantity are preset; wherein the first calibration quantity and the second calibration quantity indicate the distance value of the position change of the detection end of the position sensor, and the second calibration quantity is greater than the first calibration quantity; the third calibration quantity, the fourth calibration quantity and the fifth calibration quantity indicate the maintenance time of issuing different levels of fault alarms, and the fourth calibration quantity is greater than the third calibration quantity and less than the fifth calibration quantity; In response to the measurement values ​​of all the position sensors being less than or equal to the first calibration value, it is determined that no liquid has entered the interior of the rotating mechanism and the rotating mechanism operates normally; In response to the measurement value of any one of the position sensors being less than or equal to the second calibration value and greater than the first calibration value, a minor fault alarm is issued and the clock starts timing at this time; in response to the clock timing duration being equal to the fifth calibration value, when the measurement values ​​of all the position sensors are less than or equal to the first calibration value, the minor fault alarm disappears and the rotating mechanism operates normally; when the measurement value of any one of the position sensors is less than or equal to the second calibration value and greater than the first calibration value, the minor fault alarm is retained, confirming that the liquid entering the rotating mechanism does not affect the normal operation of the rotating mechanism, and the rotating mechanism operates normally at this time; In response to the measurement values ​​of more than two of the position sensors being less than or equal to the second calibration value and greater than the first calibration value, a minor fault alarm is issued and the clock starts timing at this time; in response to the clock timing duration being equal to the fourth calibration value, when the measurement value of any one of the position sensors is less than or equal to the second calibration value and greater than the first calibration value, the minor fault alarm is retained and the rotating mechanism operates normally; in response to the measurement values ​​of more than two of the position sensors being less than or equal to the second calibration value and greater than the first calibration value, a serious fault alarm is issued and the motor speed is limited to the first speed; In response to the measurement value of any one or more of the position sensors being greater than the second calibration value, a serious fault alarm is issued, the motor is speed-limited and the clock starts timing; in response to the clock timing duration being equal to the third calibration value, when the measurement value of more than one of the position sensors is less than or equal to the second calibration value and greater than the first calibration value, the serious fault alarm is retained and the motor is speed-limited to the second speed; when the measurement value of more than one of the position sensors is greater than the second calibration value, a particularly serious fault alarm is issued, the motor is speed-limited to the third speed and the limp home mode is entered.

[0012] In one embodiment of the present invention, the first rotational speed is 60% of the maximum rotational speed of the motor.

[0013] In one embodiment of the present invention, the second rotational speed is 50% of the maximum rotational speed of the motor.

[0014] In one embodiment of the present invention, the third rotational speed is 30% of the maximum rotational speed of the motor.

[0015] The above technical solution of the present invention has the following advantages compared with the prior art: The present invention discloses a dynamic seal detection device and method for a rotating mechanism. When seal failure liquid enters, the expansion component quickly absorbs and expands, pushing the position sensor to produce a displacement change. The system sends out an alarm signal and promptly processes the rotating mechanism, which can effectively prevent further intrusion of the liquid, thereby reducing damage to the rotating mechanism and significantly improving the safety and reliability of the equipment.

[0016] The present invention combines intelligent control logic to differentiate and handle different degrees of liquid intrusion. When a small amount of liquid is detected and the liquid can disappear naturally within the set time, the system allows the rotating mechanism to continue to operate normally without affecting the overall function of the equipment. However, when the amount of liquid is large and cannot be eliminated within the set time, the system will automatically limit the speed of the rotating mechanism to a preset speed (such as 30%, 50%, 60% of the maximum speed) to prevent further mechanical damage. This graded processing method not only improves the adaptability of the equipment in harsh environments, but also extends the service life of the equipment and reduces maintenance costs.

[0017] The expansion component of the present invention is installed after the dynamic seal ring. In addition to playing a detection role when liquid invades, the expansion material itself also has a certain liquid absorption capacity. After a small amount of liquid passes through the dynamic seal, the expansion material can quickly absorb it, further preventing the liquid from diffusing inward. This design not only improves the overall sealing effect of the dynamic seal structure, but also provides an additional protective layer when the dynamic seal fails, effectively slowing down the erosion rate of the liquid on the internal components of the motor, and ensuring that the motor can still operate stably in the case of slight leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0019] Figure 1 It is a structural schematic diagram of a dynamic seal detection device for a rotating mechanism of the present invention.

[0020] Figure 2 This is a schematic diagram of the distribution structure of the position sensor of the present invention ( Figure 1 AA section view).

[0021] Figure 3 It is a flow chart of the dynamic seal detection method for the rotating mechanism of the present invention.

[0022] Description of the Figures in the Specification: 1. Stator components; 2. Rotor parts; 3. Dynamic sealing ring; 4. Expansion components; 5. Position sensor; 6. Rotation axis. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0025] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] Example 1 Reference Figure 1 As shown, a dynamic seal detection device for a rotating mechanism of the present invention comprises: Stator component 1; a rotor component 2, the rotor component 2 rotates relative to the stator component 1, and a rotating shaft 6 connected to the motor is connected to the rotor component 2; An expansion component 4, which is annular and disposed between the stator component 1 and the rotor component 2; A plurality of position sensors 5 are disposed between the stator component 1 and the rotor component 2, and a detection end of each position sensor 5 extends axially and contacts one axial end of the expansion component 4; The dynamic sealing ring 3 is arranged between the stator component 1 and the rotor component 2 and close to the expansion component 4; the main function of the dynamic sealing ring 3 is to prevent external liquid, dust, impurities, etc. from entering the motor during the operation of the motor; After the dynamic sealing ring 3 fails, the expansion component 4 can absorb the liquid entering from the side of the dynamic sealing ring 3 and expand to push the detection end of each position sensor 5.

[0028] It should be noted that during the operation of the rotating mechanism, once the dynamic sealing structure fails, external liquid may enter the interior. Traditional methods are difficult to detect such leakage in time, resulting in the long-term presence of liquid inside, which in turn causes serious faults such as circuit short circuit, component corrosion or sensor misalignment. By setting an expansion component 4 and multiple position sensors 5 between the stator and the rotor, it can be detected as soon as the liquid enters. When the seal fails and liquid enters, the expansion component 4 quickly absorbs and expands, pushing the position sensor 5 to produce a displacement change, the system sends an alarm signal, and promptly processes the rotating mechanism, which can effectively prevent further intrusion of liquid, thereby reducing damage to the rotating mechanism and significantly improving the safety and reliability of the equipment.

[0029] In addition, the expansion component 4 is installed after the dynamic seal ring 3. In addition to playing a detection role when liquid invades, the expansion material itself also has a certain ability to absorb liquid. After a small amount of liquid passes through the dynamic seal, the expansion material can quickly absorb it, further preventing the liquid from diffusing inward. This design not only improves the overall sealing effect of the dynamic seal structure, but also provides an additional protective layer when the dynamic seal fails, effectively slowing down the erosion rate of the liquid on the internal components of the motor, and ensuring that the motor can still operate stably in the case of slight leakage.

[0030] Reference Figure 2 As shown, the plurality of position sensors 5 are evenly distributed along the circumference of the rotor component 2 and are located on the same circle.

[0031] Position sensors 5 are evenly arranged at multiple key positions of the rotating mechanism, preferably four, with intervals of 90°. The multi-point detection method ensures that the expansion component 4 can be sensed by the position sensor 5 in a timely manner when liquid penetrates from multiple directions, greatly improving the comprehensiveness and accuracy of the detection. Compared with a single-point sensor layout, the multi-sensor system can more effectively identify the specific location and degree of liquid invasion, and improve the processing accuracy.

[0032] Specifically, the expansion component 4 is made of expansion material and can expand after absorbing liquid.

[0033] The expansion component 4 is made of highly absorbent polymer, expandable rubber, expandable polyurethane foam or fiber-based water-absorbing material, all of which have good liquid absorption and expansion performance and environmental adaptability. These materials can work stably under different working conditions, such as high temperature, high humidity, wading or dusty environment, ensuring that the system can effectively detect liquid intrusion in a variety of complex environments.

[0034] During operation, the expansion component 4 absorbs the liquid entering the interior of the rotating mechanism and physically expands due to the absorption of the liquid, thereby triggering the position sensor 5 to detect and alarm. When the rotating mechanism operates in a harsh working environment, the main function of the dynamic seal ring 3 is to prevent foreign liquids, dust and other impurities from entering the interior of the motor. However, due to factors such as long-term operation, high temperature, and high humidity, the dynamic seal structure may fail, causing liquid to penetrate into the interior of the rotating mechanism. When the liquid enters the interior of the rotating mechanism through the failed dynamic seal ring 3, the expansion component 4 located between the stator component 1 and the rotor component 2 will quickly absorb the liquid. After the expansion material absorbs the liquid, its volume will increase significantly, causing the expansion component 4 to physically expand as a whole. This expansion will promote the relative displacement between the expansion component 4 and the contact end of the position sensor 5. Since the expansion component 4 and the dynamic seal ring 3 are both annular structures, the expansion is mainly carried out in the axial direction to ensure that the position sensor 5 is pushed. The position change caused by the expansion of the expansion component 4 is detected by multiple position sensors 5 (usually four, with an angle of 90° to each other) pre-arranged around the rotating mechanism. The detection end of the position sensor 5 is in axial contact with the expansion component 4. When expansion occurs, the detection end of the sensor will undergo displacement changes. These displacement changes are converted into electrical signals by the sensor and transmitted to the control system for processing.

[0035] Example 2 Reference Figure 3 As shown, this embodiment provides a method for detecting a dynamic seal for a rotating mechanism, using the dynamic seal detection device for a rotating mechanism described in Embodiment 1, the method comprising: A first calibration quantity, a second calibration quantity, a third calibration quantity, a fourth calibration quantity and a fifth calibration quantity are preset; wherein the first calibration quantity and the second calibration quantity indicate the distance value of the position change of the detection end of the position sensor 5, and the second calibration quantity is greater than the first calibration quantity; the third calibration quantity, the fourth calibration quantity and the fifth calibration quantity indicate the maintenance time of issuing different levels of fault alarms, and the fourth calibration quantity is greater than the third calibration quantity and less than the fifth calibration quantity; after the rotating mechanism is powered on: Working condition 1: in response to the measurement values ​​of all the position sensors 5 (four in this embodiment) being less than or equal to the first calibration value, it is determined that no liquid has entered the interior of the rotating mechanism and the rotating mechanism operates normally; Working condition 2: in response to the measurement value of any one of the position sensors 5 being less than or equal to the second calibration value and greater than the first calibration value, a minor fault alarm is issued and the clock starts timing at this time; in response to the clock timing duration being equal to the fifth calibration value, when the measurement values ​​of all the position sensors 5 are less than or equal to the first calibration value, the minor fault alarm disappears and the rotating mechanism operates normally; when the measurement value of any one of the position sensors 5 is less than or equal to the second calibration value and greater than the first calibration value, the minor fault alarm is retained, and at this time the amount of liquid entering the rotating mechanism is very small, and it is confirmed that the liquid entering the rotating mechanism does not affect the normal operation of the rotating mechanism, and the rotating mechanism operates normally at this time; Working condition three: In response to the measurement values ​​of more than two position sensors 5 being less than or equal to the second calibration value and greater than the first calibration value, a minor fault alarm is issued and the clock starts timing at this time; in response to the clock timing duration being equal to the fourth calibration value, when the measurement value of any one of the position sensors 5 is less than or equal to the second calibration value and greater than the first calibration value, the minor fault alarm is retained and the rotating mechanism operates normally; in response to the measurement values ​​of any two or more position sensors 5 being less than or equal to the second calibration value and greater than the first calibration value, a serious fault alarm is issued and the motor speed is limited to the first speed; the first speed is 60% of the maximum speed of the motor. At this time, it is recommended to inspect the dynamic sealing components of the rotating mechanism and discharge a small amount of liquid inside the motor.

[0036] Working condition 4: in response to the measurement value of any one or more of the position sensors 5 being greater than the second calibration value, a serious fault alarm is issued, the motor is speed-limited and the clock starts timing; in response to the clock timing duration being equal to the third calibration value, when the measurement value of one or more of the position sensors 5 is less than or equal to the second calibration value and greater than the first calibration value, the serious fault alarm is retained and the motor is speed-limited to the second speed; the second speed is 50% of the maximum speed of the motor; When the measurement value of more than one position sensor 5 is greater than the second calibration value, it is considered that a lot of liquid has entered the rotating mechanism and needs to be dealt with in time, and a particularly serious fault alarm is issued. The motor speed is limited to the third speed and enters the limp home mode. The third speed is 30% of the maximum speed of the motor.

[0037] In this embodiment, the position sensor 5 is connected to a control system, and the control system adopts a programmable logic controller (PLC) or a microcontroller unit (MCU), and the fault alarm includes a buzzer, a speaker, an LED indicator light, a flash light, etc. The clock timing uses a software program in the control system to realize the timing function, and controls the time interval through a counter or a delay function, or uses a hardware timer / timer module.

[0038] For example, when the control system detects a serious fault, a buzzer emits a continuous beep to prompt the operator to check. Different colored LED indicators (such as red for a serious fault and yellow for a minor fault) are used to display the current system status.

[0039] Through the above method, after the dynamic seal ring 3 of the rotating mechanism fails, if liquid enters the rotating mechanism, the presence of liquid can be quickly detected and an alarm can be issued, so as to minimize the damage caused by the liquid entering the rotating mechanism, and prevent the liquid from entering the rotating mechanism for a long time, thereby causing the rotating mechanism to continue to work after entering the liquid, and finally causing major losses such as a short circuit of the entire circuit or the scrapping of the rotating mechanism. The detection of liquid intrusion is realized, and the operational safety of the rotating mechanism is fully guaranteed through a systematic alarm mechanism and speed limit strategy. According to the degree and duration of liquid intrusion, the system can automatically adjust the speed of the motor, and even enter the limp home mode in extreme cases, to ensure that the equipment can still maintain basic functions in the event of a serious fault, and prevent greater losses due to the expansion of the fault. This intelligent fault response measure not only improves the reliability of the equipment, but also simplifies the maintenance process and reduces the risk of downtime and economic losses caused by equipment failure.

[0040] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A dynamic seal detection device for a rotating mechanism, characterized in that: include: Stator component (1); A rotor component (2), the rotor component (2) rotates relative to the stator component (1), and a rotating shaft (6) connected to the motor is connected to the rotor component (2); An expansion component (4) is annular and is arranged between the stator component (1) and the rotor component (2); A plurality of position sensors (5) are arranged between the stator component (1) and the rotor component (2), and a detection end of each position sensor (5) extends axially and contacts one axial end of the expansion component (4); A dynamic sealing ring (3) is arranged between the stator component (1) and the rotor component (2) and is close to the expansion component (4); The expansion component (4) is capable of absorbing liquid entering from the side of the driven sealing ring (3) and expanding to push the detection end of each position sensor (5).

2. A dynamic seal detection device for a rotating mechanism according to claim 1, characterized in that: The plurality of position sensors (5) are evenly distributed along the circumference of the rotor component (2).

3. A dynamic seal detection device for a rotating mechanism according to claim 2, characterized in that: Four position sensors (5) are provided.

4. The dynamic seal detection device for a rotating mechanism according to claim 1, characterized in that: The expansion component (4) is made of expansion material and can expand after absorbing liquid.

5. A dynamic seal detection device for a rotating mechanism according to claim 4, characterized in that: The expansion component (4) is made of highly water-absorbent polymer, expansion rubber, expansion polyurethane foam or fiber-based water-absorbent material.

6. A method for detecting dynamic seals for rotating mechanisms, characterized in that: Using the dynamic seal detection device for a rotating mechanism according to any one of claims 1 to 5, the method comprises: A first calibration quantity, a second calibration quantity, a third calibration quantity, a fourth calibration quantity and a fifth calibration quantity are preset; wherein the first calibration quantity and the second calibration quantity indicate the distance value of the position change of the detection end of the position sensor (5), and the second calibration quantity is greater than the first calibration quantity; the third calibration quantity, the fourth calibration quantity and the fifth calibration quantity indicate the duration of issuing fault alarms of different levels, and the fourth calibration quantity is greater than the third calibration quantity but less than the fifth calibration quantity; In response to the measurement values ​​of all the position sensors (5) being less than or equal to the first calibration value, it is determined that no liquid has entered the interior of the rotating mechanism and the rotating mechanism is operating normally; In response to the measurement value of any one of the position sensors (5) being less than or equal to the second calibration value and greater than the first calibration value, a minor fault alarm is issued and the clock starts timing at this time; in response to the clock timing duration being equal to the fifth calibration value, when the measurement values ​​of all the position sensors (5) are less than or equal to the first calibration value, the minor fault alarm disappears and the rotating mechanism operates normally; when the measurement value of any one of the position sensors (5) is less than or equal to the second calibration value and greater than the first calibration value, the minor fault alarm is retained, confirming that the liquid entering the rotating mechanism does not affect the normal operation of the rotating mechanism, and the rotating mechanism operates normally at this time; In response to the measurement values ​​of two or more of the position sensors (5) being less than or equal to the second calibration value and greater than the first calibration value, a minor fault alarm is issued and the clock starts timing at this time; in response to the clock timing duration being equal to the fourth calibration value, when the measurement value of any one of the position sensors (5) is less than or equal to the second calibration value and greater than the first calibration value, the minor fault alarm is retained and the rotating mechanism operates normally; in response to the measurement values ​​of any two or more of the position sensors (5) being less than or equal to the second calibration value and greater than the first calibration value, a serious fault alarm is issued and the motor speed is limited to the first speed; In response to the measurement value of any one or more of the position sensors (5) being greater than the second calibration value, a serious fault alarm is issued, the motor is speed-limited and the clock starts timing; in response to the clock timing duration being equal to the third calibration value, when the measurement value of one or more of the position sensors (5) is less than or equal to the second calibration value and greater than the first calibration value, the serious fault alarm is retained and the motor is speed-limited to the second speed; when the measurement value of one or more of the position sensors (5) is greater than the second calibration value, a particularly serious fault alarm is issued, the motor is speed-limited to the third speed and the limp home mode is entered.

7. A method for detecting dynamic seals for a rotating mechanism according to claim 6, characterized in that: The first speed is 60% of the maximum speed of the motor.

8. A method for detecting dynamic seals for a rotating mechanism according to claim 6, characterized in that: The second speed is 50% of the maximum speed of the motor.

9. A method for detecting dynamic seals for a rotating mechanism according to claim 6, characterized in that: The third speed is 30% of the maximum speed of the motor.

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