Dynamic seal lubricating device and method for rotating mechanism

Abstract

The invention relates to a dynamic seal lubricating device and method for a rotating mechanism. The motor comprises a stator part; the rotor component rotates relative to the stator component, and the rotor component is connected with a rotating shaft; the sealing element is arranged between the stator component and the rotor component, and an oil storage cavity is formed between a sealing lip of the sealing element and the rotor component; the first pressure sensor is arranged on one side of the oil storage cavity and used for detecting the pressure of the oil storage cavity; the second pressure sensor is used for detecting the pressure of the oil storage cavity; the first pressure sensor and the second pressure sensor are symmetrically arranged in the annular direction of the oil storage cavity. The lubricating grease supply device is connected with the oil storage cavity and used for providing lubricating grease to the parts, close to the first pressure sensor and the second pressure sensor, of the oil storage cavity. The lubricating effect of the dynamic seal in long-term operation is improved, and the failure cycle of the dynamic seal is greatly prolonged.

Description

Technical Field

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

[0002] Dynamic seals for rotating mechanisms are widely used, such as the seal between the outer rotor motor housing and the shaft, the seal between the water pump housing and the shaft, etc. As long as there is relative motion between the rotor and the stator of the rotating mechanism, dynamic seals are required. Good dynamic seals can protect components from external dust, liquids, impurities, etc., especially for rotating components working in some harsh environments, such as outer rotor motors that often wade through water. If the dynamic seal fails, it will directly cause problems such as short circuits in the motor's internal circuits, rust in the coils, errors in sensor measurements, or even failure, causing irreversible damage to the motor.

[0003] At present, dynamic seals are generally sealed in the form of contact friction between the lips of rubber or PTFE materials. In order to prevent dry friction between the lip and the frame and reduce the torque generated by friction, grease is applied to the oil storage cavity formed by the lip. After applying grease, in addition to reducing the friction coefficient and reducing the torque generated by friction, the sealing effect can also be enhanced. However, after the rotating parts have been running for a period of time, the grease will be lost. After all the grease is lost, the friction between the contact surface of the rubber or PTFE material and the frame will become dry friction, and the friction torque will increase accordingly. As the friction time increases, the rubber material or PTFE material of the lip will also be worn away, and the sealing effect of the dynamic seal will be greatly reduced, which will directly lead to failure of the dynamic seal. Summary of the invention

[0004] To this end, the present invention provides a dynamic seal lubrication device and method for a rotating mechanism, which can ensure that the grease in the oil storage cavity formed by the sealing lip of the seal exists for a long time. When the grease is lost, there is no need to disassemble the rotating mechanism for grease spraying, but the rotating mechanism is automatically replenished during operation, thereby improving the lubrication effect of the dynamic seal in long-term operation and greatly extending the failure period of the dynamic seal.

[0005] In order to solve the above technical problems, the present invention provides a dynamic seal lubrication device for a rotating mechanism, comprising: Stator components; a rotor component, the rotor component rotates relative to the stator component, and a rotating shaft is connected to the rotor component; A sealing member is disposed between the stator member and the rotor member, and an oil storage cavity is formed between a sealing lip of the sealing member and the rotor member; A first pressure sensor is disposed at one side of the oil storage chamber and is used to detect the pressure of the oil storage chamber; A second pressure sensor is disposed at the other side of the oil storage cavity and is used to detect the pressure of the oil storage cavity; the first pressure sensor and the second pressure sensor are symmetrically arranged along the annular direction of the oil storage cavity; A grease supply device is connected to the oil storage chamber and is used to provide grease to the oil storage chamber near the first pressure sensor and the second pressure sensor respectively.

[0006] In one embodiment of the present invention, it also includes a rotor side dynamic seal skeleton and a stator side skeleton, the rotor side dynamic seal skeleton is connected to the rotor component and the seal respectively, the stator side skeleton is connected to the stator component, the sealing lip of the seal is in friction contact with the stator side skeleton, and the oil storage chamber is formed between the seal and the stator side skeleton.

[0007] In one embodiment of the present invention, the grease supply device includes a grease storage box, a first grease delivery pipeline, and a second grease delivery pipeline. The grease storage box is connected to the oil storage chamber near the first pressure sensor part through the first grease delivery pipeline, and the grease storage box is connected to the oil storage chamber near the second pressure sensor part through the second grease delivery pipeline.

[0008] In one embodiment of the present invention, a first grease pump is provided on the first grease delivery pipeline, and a second grease pump is provided on the second grease delivery pipeline.

[0009] In one embodiment of the present invention, a first one-way valve is provided on the first grease delivery pipeline, and a second one-way valve is provided on the second grease delivery pipeline.

[0010] In one embodiment of the present invention, the sealing element comprises a rubber sealing ring or a PTFE sealing ring.

[0011] The present invention also provides a method for lubricating a dynamic seal for a rotating mechanism, using the dynamic seal lubricating device for a rotating mechanism, 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 are indicated as pressure values, and the second calibration quantity is less than the first calibration quantity; the third calibration quantity, the fourth calibration quantity and the fifth calibration quantity are indicated as time values, and the fourth calibration quantity is greater than the third calibration quantity and less than the fifth calibration quantity; Working condition 1: in response to the pressure detection values ​​of the first pressure sensor and the second pressure sensor being greater than the first calibration value, it is determined that the grease content in the oil storage chamber is normal at this time, and the first grease pump and the second grease pump are both not working; Working condition 2: in response to the pressure detection value of any one of the first pressure sensor and the second pressure sensor being less than or equal to the first calibration value and greater than the second calibration value, the first grease pump works, the first one-way valve opens, and the clock starts timing; In response to the clock timing duration being equal to the third calibration value, if the pressure detection values ​​of the first pressure sensor and the second pressure sensor are both greater than the first calibration value, the first grease pump stops working and the first one-way valve is closed, confirming that the grease content in the oil storage chamber has returned to normal at this time; if the pressure detection value of any one of the first pressure sensor and the second pressure sensor is less than or equal to the second calibration value, confirming that the grease in the oil storage chamber is insufficient at this time, the first grease pump and the second grease pump start working at the same time, the first one-way valve and the second one-way valve are opened at the same time, and the clock continues timing; In response to the clock timing duration being equal to the fourth calibration value, if the pressure detection value of any one of the first pressure sensor and the second pressure sensor is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element is damaged at this time, the first grease pump and the second grease pump stop working at the same time, the first one-way valve and the second one-way valve are closed at the same time, and a fault alarm is issued; if the pressure detection value of any one of the first pressure sensor and the second pressure sensor is greater than the second calibration value and less than or equal to the first calibration value, the first grease pump continues to work, the second grease pump stops working, and the clock continues to time; In response to the clock timing being equal to the fifth calibration value, if the pressure detection values ​​of the first pressure sensor and the second pressure sensor are both greater than the first calibration value, it is confirmed that the oil storage chamber is full of grease, and the first grease pump stops working; if the pressure detection value of any one of the first pressure sensor and the second pressure sensor is greater than the second calibration value and less than or equal to the first calibration value, it is confirmed that the sealing lip of the seal is damaged at this time, the first grease pump and the second grease pump stop working at the same time, the first one-way valve and the second one-way valve are closed at the same time, and a fault alarm is issued.

[0012] In one embodiment of the present invention, the method further includes working condition three, including: In response to the pressure detection value of any one of the first pressure sensor and the second pressure sensor being less than or equal to a second calibration value, the first grease pump and the second grease pump start working at the same time, the first one-way valve and the second one-way valve open at the same time, and the clock continues to count; In response to the clock timing being equal to the third calibration value, if the pressure detection value of any one of the first pressure sensor and the second pressure sensor is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element is damaged at this time, the first grease pump and the second grease pump stop working at the same time, the first one-way valve and the second one-way valve are closed at the same time, and a fault alarm is issued; If the pressure detection value of any one of the first pressure sensor and the second pressure sensor is greater than the second calibration value and less than or equal to the first calibration value, it is confirmed that the sealing lip of the seal is not damaged at this time, the clock timing is reset, and the working condition two is entered.

[0013] In one embodiment of the present invention, the method further includes working condition 4, including: In response to the pressure detection values ​​of the first pressure sensor and the second pressure sensor being both less than or equal to the second calibration value, the first grease pump and the second grease pump start working at the same time, the first one-way valve and the second one-way valve open at the same time, and the clock starts timing; In response to the clock timing being equal to the third calibration value, if the pressure detection values ​​of the first pressure sensor and the second pressure sensor are both less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element is damaged at this time, the first grease pump and the second grease pump stop working at the same time, the first one-way valve and the second one-way valve are closed at the same time, and a fault alarm is issued; If the pressure detection value of any one of the first pressure sensor and the second pressure sensor is less than or equal to the second calibration value, it is confirmed that the sealing lip of the seal is not damaged at this time, the clock timing is reset, and the working condition three is entered.

[0014] The above technical solution of the present invention has the following advantages compared with the prior art: The present invention discloses a dynamic seal lubrication device and method for a rotating mechanism. After the grease in the dynamic seal oil storage cavity formed of PTFE or rubber material is lost, there is no need to disassemble the dynamic seal and spray grease. During the operation of the rotating mechanism, the grease can be automatically replenished after it is lost. Since the dynamic seal has sufficient grease for lubrication throughout its entire life cycle, the life cycle of the dynamic seal structure can be greatly extended, and while ensuring a good sealing effect throughout the entire life cycle, a lower friction torque can be achieved. During the rotation of the rotating mechanism, if the PTFE lip or rubber lip of the dynamic seal mechanism ruptures, the fault can be reported in time, which is convenient for later detection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 It is a structural schematic diagram of a dynamic seal lubrication device for a rotating mechanism of the present invention.

[0017] Figure 2 yes Figure 1 Cross-sectional view along AA direction.

[0018] Figure 3 It is a flow chart of the dynamic seal lubrication method for the rotating mechanism of the present invention (operating condition one).

[0019] Figure 4 It is a flow chart of the dynamic seal lubrication method for the rotating mechanism of the present invention (a part of the second working condition).

[0020] Figure 5 It is a flow chart of the dynamic seal lubrication method for the rotating mechanism of the present invention (another part of the second working condition).

[0021] Figure 6 It is a flow chart of the dynamic seal lubrication method for the rotating mechanism of the present invention (operating condition three).

[0022] Figure 7 It is a flow chart of the dynamic seal lubrication method for the rotating mechanism of the present invention (operating condition four).

[0023] Description of the Figures in the Specification: 1. Grease storage box; 2. First grease pump; 3. First grease delivery pipeline; 4. Stator component; 5. Rotor component; 6. Seal; 7. Rotor side dynamic seal frame; 8. First pressure sensor; 9. First one-way valve; 10. Rotating shaft; 11. Second grease pump; 12. Second one-way valve; 13. Second pressure sensor; 14. Stator side frame; 15. Oil storage chamber; 16. Second grease delivery pipeline. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Example 1 Reference Figure 1 , Figure 2 As shown, a dynamic seal lubrication device for a rotating mechanism of this embodiment includes: Stator component 4; a rotor component 5, wherein the rotor component 5 rotates relative to the stator component 4, and a rotating shaft 10 is connected to the rotor component 5; A sealing member 6 is disposed between the stator member 4 and the rotor member 5, and an oil storage chamber 15 is formed between a sealing lip of the sealing member 6 and the rotor member 5; A first pressure sensor 8 is disposed at one side of the oil storage chamber 15 and is used to detect the pressure of the oil storage chamber 15 in real time; The second pressure sensor 13 is disposed at the other side of the oil storage chamber 15 and is used to detect the pressure of the oil storage chamber 15 in real time; the first pressure sensor 8 and the second pressure sensor 13 are symmetrically arranged along the oil storage chamber 15; The grease supply device is connected to the oil storage chamber 15 and is used to provide grease to the oil storage chamber 15 near the first pressure sensor 8 and the second pressure sensor 13 respectively.

[0029] Specifically, it also includes a rotor-side dynamic seal skeleton 7 and a stator-side skeleton 14. The rotor-side dynamic seal skeleton 7 is connected to the rotor component 5 and the seal 6 respectively, and rotates with the rotor component 5. The stator-side skeleton 14 is connected to the stator component 4. The (two) sealing lips of the seal 6 are in friction contact with the stator-side skeleton 14, and the oil storage chamber 15 is formed between the stator-side skeleton 14 and the stator-side skeleton 14.

[0030] Specifically, the grease supply device includes a grease storage box 1, a first grease delivery pipeline 3, and a second grease delivery pipeline 16. The grease storage box 1 is connected to the oil storage chamber 15 near the first pressure sensor 8 through the first grease delivery pipeline 3, and the grease storage box 1 is connected to the oil storage chamber 15 near the second pressure sensor 13 through the second grease delivery pipeline 16.

[0031] Specifically, the first grease delivery pipeline 3 is provided with a first grease pump 2 , and the second grease delivery pipeline 16 is provided with a second grease pump 11 .

[0032] Specifically, the first grease delivery pipeline 3 is provided with a first one-way valve 9, and the second grease delivery pipeline 16 is provided with a second one-way valve 12. The first one-way valve 9 and the second one-way valve 12 only allow the grease in the delivery pipeline to flow from the grease storage box 1 to the oil storage cavity 15 formed by the lip of the seal 6, and do not allow the grease to flow in the reverse direction.

[0033] Specifically, the sealing member 6 includes a rubber sealing ring or a PTFE sealing ring.

[0034] It can be understood that the first pressure sensor 8 and the second pressure sensor 13 are symmetrically arranged along the annular direction of the oil storage chamber 15 and are 180° apart from each other, so that the pressure of the oil storage chamber 15 can be detected in all directions, and the cost is saved.

[0035] It should be noted that after a period of operation, the grease of the traditional dynamic sealing system will gradually be lost, and the grease needs to be manually replenished by disassembling the device, which not only increases the maintenance cost, but also prolongs the downtime, affecting the continuous operation of the equipment. The grease supply device realizes the automatic replenishment of grease. When the grease in the oil storage chamber 15 is lost, the system can automatically transport the grease from the storage box to the oil storage chamber 15 without manual intervention. This design greatly simplifies the maintenance process, reduces the frequency of manual operation and possible errors, and improves the overall operation efficiency and reliability of the equipment.

[0036] Example 2 This embodiment provides a method for lubricating a dynamic seal for a rotating mechanism, using the dynamic seal lubricating device for a rotating mechanism in Embodiment 1, 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 are indicated as pressure values, and the second calibration quantity is smaller than the first calibration quantity; the third calibration quantity, the fourth calibration quantity and the fifth calibration quantity are indicated as time values, and the fourth calibration quantity is larger than the third calibration quantity but smaller than the fifth calibration quantity.

[0037] After the rotating mechanism is powered on, if the speed of the rotor component 5 of the rotating mechanism is ≤0, the first pressure sensor 8 and the second pressure sensor 13 do not work; if the speed of the rotor component 5 is >0, the first pressure sensor 8 and the second pressure sensor 13 start to detect the pressure of the oil storage chamber 15 between the lips, and process it in four working conditions, refer to Figures 3 to 6 shown.

[0038] Working condition 1: In response to the pressure detection values ​​of the first pressure sensor 8 and the second pressure sensor 13 being greater than the first calibration value, it is determined that the grease content in the oil storage chamber 15 is normal at this time, and the first grease pump 2 and the second grease pump 11 are not working; Figure 3 shown.

[0039] Working condition 2: In response to the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 being less than or equal to the first calibration value and greater than the second calibration value, the first grease pump 2 works, the first one-way valve 9 opens, and the clock starts timing; In response to the clock timing duration being equal to the third calibration amount, if the pressure detection values ​​of the first pressure sensor 8 and the second pressure sensor 13 are both greater than the first calibration amount, the first grease pump 2 stops working, and the first one-way valve 9 is closed, confirming that the grease content in the oil storage chamber 15 has returned to normal at this time; if the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 is less than or equal to the second calibration amount, confirming that the grease in the oil storage chamber 15 is insufficient at this time, the first grease pump 2 and the second grease pump 11 start working at the same time, the first one-way valve 9 and the second one-way valve 12 are opened at the same time, and the clock continues timing; In response to the clock timing being equal to the fourth calibration value, if the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element 6 is damaged, the pressure in the oil storage chamber 15 is low, and there is a greater risk of leakage, the first grease pump 2 and the second grease pump 11 stop working at the same time, the first one-way valve 9 and the second one-way valve 12 are closed at the same time, and a fault alarm is issued; if the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 is greater than the second calibration value and less than or equal to the first calibration value , it is considered that a certain amount of grease has been filled into the oil storage chamber 15 at this time. In order to ensure that the grease is not overfilled, the grease filling speed is reduced (if the two pumps pump the grease at the same time, the filling speed will be very fast. When the pressure sensor detects that the grease is saturated and issues a command to stop the pump, some grease will still be filled into the oil storage chamber 15 due to the inertia of the liquid flow, which will cause the grease to be overfilled. In order to prevent the grease from being overfilled, one of the grease pumps is turned off to reduce the grease filling speed). The first grease pump 2 continues to work, the second grease pump 11 stops working, and the clock continues to count; In response to the clock timing being equal to the fifth calibration value, if the pressure detection values ​​of the first pressure sensor 8 and the second pressure sensor 13 are both greater than the first calibration value, it is confirmed that the oil storage chamber 15 is full of grease and the first grease pump 2 stops working; if the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 is greater than the second calibration value and less than or equal to the first calibration value, it is confirmed that the sealing lip of the seal 6 is damaged, the oil storage chamber 15 has low pressure, and there is a risk of leakage, the first grease pump 2 and the second grease pump 11 stop working at the same time, the first one-way valve 9 and the second one-way valve 12 are closed at the same time, and a fault alarm is issued. Figure 4 , Figure 5 shown.

[0040] Working condition three: In response to the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 being less than or equal to the second calibration value, the first grease pump 2 and the second grease pump 11 start working at the same time, the first one-way valve 9 and the second one-way valve 12 open at the same time, and the clock continues to count; In response to the clock timing being equal to the third calibration value, if the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element 6 is damaged, the pressure of the oil storage chamber 15 is low, and there is a greater risk of leakage, the first grease pump 2 and the second grease pump 11 stop working at the same time, the first one-way valve 9 and the second one-way valve 12 are closed at the same time, and a fault alarm is issued; If the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 is greater than the second calibration value and less than or equal to the first calibration value, it is confirmed that the sealing lip of the sealing member 6 is not damaged at this time, and the grease in the oil storage chamber 15 is lost normally, so it can be replenished. At this time, the clock timing is reset and the second working condition is entered. Figure 6 shown.

[0041] Working condition 4: In response to the pressure detection values ​​of the first pressure sensor 8 and the second pressure sensor 13 being less than or equal to the second calibration value, the first grease pump 2 and the second grease pump 11 start working at the same time, the first one-way valve 9 and the second one-way valve 12 open at the same time, and the clock starts timing; In response to the clock timing being equal to the third calibration value, if the pressure detection values ​​of the first pressure sensor 8 and the second pressure sensor 13 are both less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element 6 is damaged at this time, and continued replenishment of grease will flow out from the damaged position, the first grease pump 2 and the second grease pump 11 stop working at the same time, the first one-way valve 9 and the second one-way valve 12 are closed at the same time, and a fault alarm is issued; If the pressure detection value of any one of the first pressure sensor 8 and the second pressure sensor 13 is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing member 6 is not damaged and the grease in the oil storage chamber 15 is lost normally, so it can be replenished. At this time, the clock timing is reset and the working condition 3 is entered. Figure 7 shown.

[0042] In this embodiment, the first pressure sensor 8 and the second pressure sensor 13 are 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.

[0043] By integrating a pressure sensor in the sealing structure, the pressure change in the oil storage chamber 15 can be monitored in real time. When the dynamic seal lip is broken or the grease is insufficient, the system can detect the pressure abnormality in time and issue a fault alarm through alarm devices such as buzzers and LED indicators. Not only can it prompt the operator to carry out maintenance in time to prevent the fault from further expanding, but it can also automatically start the replenishment mechanism when the grease is insufficient to ensure that the equipment will not cause more serious damage due to poor lubrication. The safety and reliability of the equipment are improved, and the probability of serious faults such as circuit short circuit and component corrosion caused by dynamic seal failure is reduced.

[0044] 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 lubrication device for a rotating mechanism, characterized in that: include: stator component (4); a rotor component (5), the rotor component (5) rotating relative to the stator component (4), the rotor component (5) being connected to a rotating shaft (10); A sealing member (6) is arranged between the stator member (4) and the rotor member (5), and an oil storage chamber (15) is formed between a sealing lip of the sealing member (6) and the rotor member (5); A first pressure sensor (8) is arranged on one side of the oil storage chamber (15) and is used to detect the pressure of the oil storage chamber (15); a second pressure sensor (13) disposed at the other side of the oil storage chamber (15) and used to detect the pressure of the oil storage chamber (15); the first pressure sensor (8) and the second pressure sensor (13) are symmetrically arranged in the annular direction along the oil storage chamber (15); A grease supply device is connected to the oil storage chamber (15) and is used to supply grease to the oil storage chamber (15) near the first pressure sensor (8) and the second pressure sensor (13), respectively.

2. A dynamic seal lubrication device for a rotating mechanism according to claim 1, characterized in that: It also includes a rotor-side dynamic seal skeleton (7) and a stator-side skeleton (14), wherein the rotor-side dynamic seal skeleton (7) is connected to the rotor component (5) and the seal (6) respectively, and the stator-side skeleton (14) is connected to the stator component (4), and the sealing lip of the seal (6) is in frictional contact with the stator-side skeleton (14), and the oil storage chamber (15) is formed between the seal and the stator-side skeleton (14).

3. The dynamic seal lubrication device for a rotating mechanism according to claim 1, characterized in that: The grease supply device comprises a grease storage box (1), a first grease delivery pipeline (3), and a second grease delivery pipeline (16); the grease storage box (1) is connected to the oil storage chamber (15) near the first pressure sensor (8) via the first grease delivery pipeline (3); and the grease storage box (1) is connected to the oil storage chamber (15) near the second pressure sensor (13) via the second grease delivery pipeline (16).

4. A dynamic seal lubrication device for a rotating mechanism according to claim 3, characterized in that: The first grease delivery pipeline (3) is provided with a first grease pump (2), and the second grease delivery pipeline (16) is provided with a second grease pump (11).

5. The dynamic seal lubrication device for a rotating mechanism according to claim 3, characterized in that: The first lubricating grease delivery pipeline (3) is provided with a first one-way valve (9), and the second lubricating grease delivery pipeline (16) is provided with a second one-way valve (12).

6. The dynamic seal lubrication device for a rotating mechanism according to claim 1, characterized in that: The sealing element (6) comprises a rubber sealing ring or a PTFE sealing ring.

7. A method for lubricating a dynamic seal for a rotating mechanism, characterized in that: The dynamic seal lubrication device for a rotating mechanism according to any one of claims 1 to 6 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 are indicated as pressure values, and the second calibration quantity is less than the first calibration quantity; the third calibration quantity, the fourth calibration quantity and the fifth calibration quantity are indicated as time values, and the fourth calibration quantity is greater than the third calibration quantity and less than the fifth calibration quantity; Working condition 1: in response to the pressure detection values ​​of the first pressure sensor (8) and the second pressure sensor (13) being greater than the first calibration value, it is determined that the grease content in the oil storage chamber (15) is normal at this time, and the first grease pump (2) and the second grease pump (11) are both not working; Working condition 2: in response to the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) being less than or equal to the first calibration value and greater than the second calibration value, the first grease pump (2) operates, the first one-way valve (9) opens and the clock starts timing; In response to the clock timing duration being equal to the third calibration value, if the pressure detection values ​​of the first pressure sensor (8) and the second pressure sensor (13) are both greater than the first calibration value, the first grease pump (2) stops working and the first one-way valve (9) is closed, confirming that the grease content in the oil storage chamber (15) has returned to normal at this time; if the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) is less than or equal to the second calibration value, confirming that the grease in the oil storage chamber (15) is insufficient at this time, the first grease pump (2) and the second grease pump (11) start working at the same time, the first one-way valve (9) and the second one-way valve (12) are opened at the same time, and the clock continues timing; In response to the clock timing duration being equal to the fourth calibration value, if the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing member (6) is damaged at this time, the first grease pump (2) and the second grease pump (11) stop working at the same time, the first one-way valve (9) and the second one-way valve (12) are closed at the same time, and a fault alarm is issued; if the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) is greater than the second calibration value and less than or equal to the first calibration value, the first grease pump (2) continues to work, the second grease pump (11) stops working, and the clock continues to count; In response to the clock timing being equal to the fifth calibration value, if the pressure detection values ​​of the first pressure sensor (8) and the second pressure sensor (13) are both greater than the first calibration value, it is confirmed that the grease in the oil storage chamber (15) is full, and the first grease pump (2) stops working; if the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) is greater than the second calibration value and less than or equal to the first calibration value, it is confirmed that the sealing lip of the sealing element (6) is damaged at this time, the first grease pump (2) and the second grease pump (11) stop working at the same time, the first one-way valve (9) and the second one-way valve (12) are closed at the same time, and a fault alarm is issued.

8. A method for lubricating a dynamic seal for a rotating mechanism according to claim 7, characterized in that: The method further includes working condition 3, including: In response to the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) being less than or equal to a second calibration value, the first grease pump (2) and the second grease pump (11) start working at the same time, the first one-way valve (9) and the second one-way valve (12) open at the same time, and the clock continues to count; In response to the clock timing being equal to the third calibration value, if the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element (6) is damaged at this time, the first grease pump (2) and the second grease pump (11) stop working at the same time, the first one-way valve (9) and the second one-way valve (12) are closed at the same time, and a fault alarm is issued; If the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) is greater than the second calibration value and less than or equal to the first calibration value, it is confirmed that the sealing lip of the sealing element (6) is not damaged at this time, the clock timing is reset, and the second working condition is entered.

9. A method for lubricating a dynamic seal for a rotating mechanism according to claim 8, characterized in that: The method further includes working condition 4, including: In response to the pressure detection values ​​of the first pressure sensor (8) and the second pressure sensor (13) being less than or equal to the second calibration value, the first grease pump (2) and the second grease pump (11) start working at the same time, the first one-way valve (9) and the second one-way valve (12) open at the same time, and a clock starts timing; In response to the clock timing being equal to the third calibration value, if the pressure detection values ​​of the first pressure sensor (8) and the second pressure sensor (13) are both less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element (6) is damaged at this time, the first grease pump (2) and the second grease pump (11) stop working at the same time, the first one-way valve (9) and the second one-way valve (12) are closed at the same time, and a fault alarm is issued; If the pressure detection value of any one of the first pressure sensor (8) and the second pressure sensor (13) is less than or equal to the second calibration value, it is confirmed that the sealing lip of the sealing element (6) is not damaged at this time, the clock timing is reset, and the working condition three is entered.

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