A shaft sealing structure and a shaft sealing control method

Abstract

The present invention discloses a shaft sealing structure and a shaft sealing control method. The shaft sealing structure includes a sealing ring and a tension adjustment assembly. The sealing ring is formed with an annular installation groove. The tension adjustment assembly includes an adjustment part. The two ends of the adjustment part are movably lapped to enclose an adjustment ring with an adjustable diameter. By adjusting the diameter of the adjustment ring, the inner ring of the sealing ring is always in sealed contact with the shaft, thereby improving the sealing effect and avoiding grease leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly relates to a shaft sealing structure and a shaft sealing control method. Background Art

[0002] An oil seal is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and generally refers to any liquid substance). It isolates the components that need to be lubricated in the transmission components from the output components, so as to prevent the lubricating oil from leaking.

[0003] In the prior art, there are various types of oil seals. Common oil seals include sealing rings. Since the inner ring of the rubber will wear due to the high-speed rotation of the shaft, the sealing will fail and the grease will leak. Summary of the Invention

[0004] The main object of the present invention is to propose a shaft sealing structure, aiming to solve the problem in the prior art that due to the high-speed rotation of the shaft, the inner ring of the rubber will wear, resulting in sealing failure and grease leakage.

[0005] To achieve the above object, the shaft sealing structure proposed by the present invention includes:

[0006] A sealing ring, which forms an annular installation groove; and,

[0007] A tension adjustment assembly, including an adjustment part, the two ends of the adjustment part are movably lapped to enclose an adjustment ring with an adjustable diameter, and the adjustment ring is installed in the annular installation groove.

[0008] Optionally, a guiding structure is provided between the two ends of the adjustment part that overlap each other. The guiding structure includes a guiding part extending circumferentially along the annular installation groove and a matching part adapted to the guiding part. Among the guiding part and the matching part, one is arranged at one end of the adjustment part, and the other is arranged at the other end of the adjustment part; and / or,

[0009] Among the two ends of the adjustment part that overlap each other, one end is a driving end and the other end is a fixed end. The driving end can slide relative to the fixed end. The shaft sealing structure further includes a driving assembly, which is installed in the annular installation groove to drive the driving end to slide.

[0010] Optionally, the guiding part includes a guiding hole, and the matching part includes a guiding strip adapted to the guiding hole; and / or,

[0011] A plurality of tooth portions are provided on the driving end, and the plurality of tooth portions are arranged at intervals in the circumferential direction of the annular mounting groove. The driving assembly includes a driving motor, the driving motor has a driving shaft extending axially along the annular mounting groove, and a driving gear is sleeved on the driving shaft, and the driving gear is selectively engaged with some of the plurality of tooth portions.

[0012] Optionally, the rotating shaft sealing structure further includes:

[0013] A temperature sensor, installed in the annular mounting groove, for detecting the temperature of the inner ring of the sealing ring;

[0014] A controller, installed in the annular mounting groove, and electrically connected to the temperature sensor and the driving motor.

[0015] Optionally, it further includes a pressure sensor, the pressure sensor is installed in the annular mounting groove for detecting the pressure of the inner ring of the sealing ring, and the pressure sensor is electrically connected to the controller; and / or,

[0016] A plurality of the temperature sensors are provided, and the plurality of temperature sensors are arranged at intervals in the circumferential direction of the annular mounting groove.

[0017] Optionally, a plurality of the pressure sensors are provided, and the plurality of pressure sensors are all arranged at intervals in the circumferential direction of the annular mounting groove; and / or,

[0018] The temperature sensor and the pressure sensor are integrated.

[0019] To achieve the above object, the present invention proposes a rotating shaft sealing control method. Based on the rotating shaft sealing structure as described above, the rotating shaft sealing control method includes the following steps:

[0020] Obtain the adjustment parameters of the sealing ring in real time;

[0021] When the adjustment parameters meet the preset conditions, control the tension adjustment assembly to work.

[0022] Optionally, the adjustment parameters include the actual pressure acting on the inner ring of the sealing ring and / or the actual temperature of the inner ring of the sealing ring.

[0023] Optionally, set the actual pressure acting on the inner ring of the sealing ring as P1, and set the preset pressure acting on the inner ring of the sealing ring as P;

[0024] The step of controlling the tension adjustment assembly to work when the adjustment parameters meet the preset conditions includes:

[0025] When P1 > P(1 + 2%), control the tension adjustment assembly to work to increase the diameter of the adjustment ring;

[0026] When P1 < P(1 - 2%), control the tension adjustment component to work and reduce the diameter of the adjustment ring;

[0027] When P(1 - 2%) ≤ P1 ≤ P(1 + 2%), this is the measurement tolerance range, and the actuator does not make any adjustment.

[0028] Optionally, set the actual temperature acting on the inner ring of the sealing ring as T1, and set the preset temperature acting on the inner ring of the sealing ring as T;

[0029] The step of controlling the tension adjustment component to work when the adjustment parameter meets the preset condition includes:

[0030] When T1 > T(1 + 2%), control the tension adjustment component to work to increase the diameter of the adjustment ring;

[0031] When T1 < T(1 - 2%), control the tension adjustment component to work and reduce the diameter of the adjustment ring;

[0032] When T(1 - 2%) ≤ T1 ≤ T(1 + 2%), this is the measurement tolerance range, and the actuator does not make any adjustment.

[0033] In the technical solution provided by the present invention, the adjustment ring is installed in the annular installation groove. By adjusting the size of the diameter of the adjustment ring, the inner ring of the sealing ring is always in sealed fit with the rotating shaft, thereby improving the sealing effect and avoiding grease leakage. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0035] Figure 1 It is a schematic structural diagram of an embodiment of the rotating shaft sealing structure provided by the present invention;

[0036] Figure 2 For Figure 1 The left view schematic diagram of the rotating shaft sealing structure in

[0037] Figure 3 For Figure 1 The schematic structural diagram of the tension adjustment component in installed with a temperature sensor and / or a pressure sensor;

[0038] Figure 4 ForFigure 1 Schematic structural diagram of the tension adjustment component and the drive component in

[0039] Figure 5 is Figure 1 Schematic structural diagram of the controller of the hardware operating environment involved in the solution of the embodiment in

[0040] Figure 6 Schematic flow chart of an embodiment of the shaft seal control method provided by the present invention.

[0041] Explanation of the reference numerals in the drawings:

[0042] Label Name Label Name 100 Rotating shaft sealing structure 4 Drive assembly 1 Sealing ring 41 Drive motor 11 Annular mounting groove 411 Drive shaft 2 Tension adjustment assembly 412 Drive gear 21 Adjusting part 51 Tooth part 21a Drive end 6 Temperature sensor 21b Fixed end 7 Controller 3 Guide structure 8 Pressure sensor 31 Guide part a Adjusting ring 32 Fitting part

[0043] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0045] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] An oil seal is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and generally refers to any liquid substance). It isolates the components that need to be lubricated in the transmission components from the output components, preventing the leakage of lubricating oil.

[0048] In the prior art, there are various types of oil seals. Common oil seals include sealing rings. Since the high-speed rotation of the rotating shaft will cause wear of the inner ring of the rubber, resulting in seal failure and grease leakage.

[0049] The present invention provides a rotating shaft sealing structure and a rotating shaft sealing control method. Among them, Figures 1 to 4 is a schematic structural diagram of an embodiment of the rotating shaft sealing structure provided by the present invention.

[0050] Please refer to Figures 1 to 3 , the rotating shaft sealing structure 100 includes a sealing ring 1 and a tension adjustment assembly 2. The sealing ring 1 is formed with an annular installation groove 11. The tension adjustment assembly 2 includes an adjustment portion 21. The two ends of the adjustment portion 21 are movably lapped to enclose an adjustment ring a with an adjustable diameter. The adjustment ring a is installed in the annular installation groove 11.

[0051] In the technical solution provided by the present invention, the adjustment ring a is installed in the annular installation groove 11. By adjusting the diameter of the adjustment ring a, the inner ring of the sealing ring 1 is always in sealing contact with the rotating shaft, thereby improving the sealing effect and preventing grease leakage.

[0052] Specifically, a guiding structure 3 is provided between the two mutually lapped ends of the adjustment portion 21. The guiding structure 3 includes a guiding portion 31 extending circumferentially along the annular installation groove 11 and a cooperating portion 32 adapted to the guiding portion 31. Among the guiding portion 31 and the cooperating portion 32, one of them is provided at one end of the adjustment portion 21, and the other is provided at the other end of the adjustment portion 21. Through the cooperation and installation of the guiding portion 31 and the cooperating portion 32, the adjustment is convenient when adjusting the diameter of the adjustment ring a, and the adjustment accuracy is ensured.

[0053] There are various types of the guiding portion 31 and the cooperating portion 32. For example, among the guiding portion 31 and the cooperating portion 32, one of them can be set as a guiding groove, and the other is set as a guiding protrusion adapted to the guiding groove. Specifically, in the embodiment of the present application, the guiding portion 31 includes a guiding hole, and the cooperating portion 32 includes a guiding strip adapted to the guiding hole. Through the cooperation and installation of the guiding hole and the guiding strip, the guiding of the two ends of the adjustment portion 21 to be movably lapped is realized, and the structure is simple and easy to operate.

[0054] Specifically, refer to Figure 4Among the two ends of the adjusting portion 21 that overlap each other, one end is a driving end 21a and the other end is a fixed end 21b. The driving end 21a can slide relative to the fixed end 21b. The rotating shaft sealing structure 100 also includes a driving component 4, and the driving component 4 is installed in the annular mounting groove 11. The driving end 21a is driven to slide by the driving component 4, thereby realizing automation and simple operation.

[0055] There are many ways to drive the driving end 21a to slide, for example, by driving through a transmission belt structure or a transmission chain structure, etc. Specifically, in this application, reference is made to Figure 1 A plurality of teeth 51 are arranged on the driving end 21a, and the plurality of teeth 51 are arranged at intervals along the circumference of the annular mounting groove 11. The driving assembly 4 includes a driving motor 41, and the driving motor 41 has a driving shaft 411 extending axially along the annular mounting groove 11. A driving gear 412 is mounted on the driving shaft 411, and the driving gear 412 can selectively mesh with part of the plurality of teeth 51, so as to drive the driving end 21a to slide. Since the plurality of teeth 51 have a self-locking function when meshing with the driving gear 412, after the diameter of the adjusting ring a is adjusted, when there is no external force, the driving end 21a is fixed relative to the fixed end 21b, and the effect is good.

[0056] Specifically, the rotating shaft sealing structure 100 also includes a temperature sensor 6 and a controller 7. The temperature sensor 6 is installed in the annular mounting groove 11, and the temperature of the inner ring of the sealing ring 1 is detected by the temperature sensor 6. The controller 7 is installed in the annular mounting groove 11 and is electrically connected to the temperature sensor 6 and the driving motor 41. In this way, when the temperature sensor 6 detects that the temperature of the inner ring of the sealing ring 1 is too high, the over-temperature signal is transmitted to the controller 7. The controller 7 controls the driving motor 41 to work, and the driving motor 41 drives the driving gear 412 to rotate, thereby driving the driving end 21a to move, so that the diameter of the adjusting ring a is reduced, so that the inner ring of the sealing ring 1 is sealed and fitted with the rotating shaft, thereby improving the sealing effect and avoiding grease leakage.

[0057] Considering that the inner ring of the sealing ring 1 is worn when it is mounted on the rotating shaft, resulting in different temperatures at different locations on the inner ring of the sealing ring 1, refer to Figure 3 A plurality of temperature sensors 6 are provided, and the plurality of temperature sensors 6 are arranged at circumferential intervals along the annular mounting groove 11. By so arranging, the temperatures of a plurality of locations of the inner ring of the sealing ring 1 arranged at circumferential intervals are acquired by the plurality of temperature sensors 6, so as to realize accurate monitoring of the wear condition and accurate adjustment of the diameter of the adjustment ring a, thereby improving the sealing effect.

[0058] Furthermore, the rotating shaft sealing structure 100 also includes a pressure sensor 8, which is installed in the annular mounting groove 11. The pressure of the inner ring of the sealing ring 1 is detected by the pressure sensor 8. The pressure sensor 8 is electrically connected to the controller 7. In this way, when the pressure sensor 8 detects that the pressure of the inner ring of the sealing ring 1 is too low, the pressure sensor 8 transmits a signal of too low pressure to the controller 7. The controller 7 controls the driving motor 41 to work, and the driving motor 41 drives the driving gear 412 to rotate, thereby driving the driving end 21a to move, so that the diameter of the adjusting ring a is reduced, so that the inner ring of the sealing ring 1 is sealed and fitted with the rotating shaft, thereby improving the sealing effect and avoiding grease leakage.

[0059] Considering that the inner ring of the sealing ring 1 is worn when it is mounted on the rotating shaft, resulting in different pressures at different locations on the inner ring of the sealing ring 1, refer to Figure 1 A plurality of pressure sensors 8 are provided, and the plurality of pressure sensors 8 are arranged at circumferential intervals along the annular mounting groove 11. The pressures of a plurality of locations of the inner ring of the sealing ring 1 arranged at circumferential intervals are obtained by the plurality of pressure sensors 8, so as to realize accurate monitoring of wear conditions and accurate adjustment of the diameter of the adjustment ring a, thereby improving the sealing effect.

[0060] In order to reduce the volume, in the embodiment of the present application, the temperature sensor 6 and the pressure sensor 8 are integrated into one body. Such an arrangement makes the temperature sensor 6 and the pressure sensor 8 integrated into one body have a small overall volume and are easy to install, thereby improving the installation efficiency.

[0061] It should be noted that the control device in the above embodiment may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0062] exist Figure 5 In the control device shown, the processor 1001 calls the shaft sealing control program stored in the memory 1005, and the shaft sealing control program performs the following operations:

[0063] Obtain the adjustment parameters of the sealing ring in real time;

[0064] When the adjustment parameters meet the preset conditions, control the tension adjustment component to work.

[0065] Call the test program of the transmission efficiency test system 100 stored in the memory 1005 through the processor 1001, and perform the following operations:

[0066] The adjustment parameters include the actual pressure acting on the inner ring of the sealing ring and / or the actual temperature of the inner ring of the sealing ring.

[0067] Call the test program of the transmission efficiency test system 100 stored in the memory 1005 through the processor 1001, and perform the following operations:

[0068] Set the actual pressure acting on the inner ring of the sealing ring as P1, and set the preset pressure acting on the inner ring of the sealing ring as P; the step of controlling the tension adjustment component to work when the adjustment parameters meet the preset conditions includes:

[0069] When P1 > P(1 + 2%), control the tension adjustment component to work to increase the diameter of the adjustment ring;

[0070] When P1 < P(1 - 2%), control the tension adjustment component to work to reduce the diameter of the adjustment ring;

[0071] When P(1 - 2%) ≤ P1 ≤ P(1 + 2%), this is the measurement tolerance range, and the actuator does not make any adjustment.

[0072] Call the test program of the transmission efficiency test system 100 stored in the memory 1005 through the processor 1001, and perform the following operations:

[0073] Set the actual temperature acting on the inner ring of the sealing ring as T1, and set the preset temperature acting on the inner ring of the sealing ring as T; the step of controlling the tension adjustment component to work when the adjustment parameters meet the preset conditions includes:

[0074] When T1 > T(1 + 2%), control the tension adjustment component to work to increase the diameter of the adjustment ring;

[0075] When T1 < T(1 - 2%), control the tension adjustment component to work to reduce the diameter of the adjustment ring;

[0076] When T(1 - 2%) ≤ T1 ≤ T(1 + 2%), this is the measurement tolerance range, and the actuator does not make any adjustment.

[0077] Based on the above hardware structure, the present invention proposes a shaft seal control method. By obtaining the adjustment parameters of the sealing ring 1 in real time, when the adjustment parameters meet the preset conditions, the tension adjustment assembly 2 is controlled to work, so as to adjust the diameter of the adjustment ring a according to the specific situation, improve the sealing effect between the inner ring of the sealing ring 1 and the shaft, and avoid grease leakage.

[0078] Specifically, referring to Figure 6 , the present invention provides a shaft seal control method. The shaft seal control method is based on the shaft seal structure 100 as described above, wherein, Figure 6 is a schematic flow chart of the shaft seal control method provided by the present invention. Specifically, the shaft seal control method includes the following steps:

[0079] Step 10: Obtain the adjustment parameters of the sealing ring 1 in real time;

[0080] It should be noted that the adjustment parameters include the actual pressure acting on the inner ring of the sealing ring 1 and / or the actual temperature of the inner ring of the sealing ring 1. That is, the adjustment parameters may only include the actual pressure acting on the inner ring of the sealing ring 1, or may only include the actual temperature of the inner ring of the sealing ring 1. In order to accurately realize the inner ring of the adjustment ring a, in the embodiments of the present application, the adjustment parameters include the actual pressure acting on the inner ring of the sealing ring 1 and the actual temperature of the inner ring of the sealing ring 1. Of course, in other embodiments, the adjustment parameters can be set as needed, and the present application does not limit this.

[0081] Step 20: When the adjustment parameters meet the preset conditions, control the tension adjustment assembly 2 to work.

[0082] In the technical solution provided by the present invention, by obtaining the adjustment parameters of the sealing ring 1 in real time, when the adjustment parameters meet the preset conditions, the tension adjustment assembly 2 is controlled to work, so as to adjust the diameter of the adjustment ring a according to the specific situation, improve the sealing effect between the inner ring of the sealing ring 1 and the shaft, and avoid grease leakage.

[0083] Specifically, set the actual pressure acting on the inner ring of the sealing ring 1 as P1, and set the preset pressure acting on the inner ring of the sealing ring 1 as P; Step S20 When the adjustment parameters meet the preset conditions, the steps of controlling the tension adjustment assembly 2 to work include:

[0084] Step 201a: When P1 > P(1 + 2%), control the tension adjustment assembly 2 to work to increase the diameter of the adjustment ring a;

[0085] It should be noted that in this step, K1 = P1 / P is set. Wherein, when 1.02 < K1, the displacement of the driving end 21a is L1, where L1 = a1x + b1, and both a1 and b1 are constants. The change in L1 will cause the coefficient K1 to change until the coefficient K1 returns to 0.98 ≤ K1 ≤ 1.02, and the displacement of L1 will stop changing.

[0086] Step 202a: When P1 < P(1 - 2%), control the tension adjustment assembly 2 to work and reduce the diameter of the adjustment ring a.

[0087] It should be noted that in this step, K1 = P1 / P is set. Wherein, when 0.98 < K1 < 1.02, the displacement of the driving end 21a is L2, where L2 = a2x + b2, and both a2 and b2 are constants. The change in L2 will cause the coefficient K1 to change until the coefficient K2 returns to 0.98 ≤ K1 ≤ 1.02, and the displacement of L2 will stop changing.

[0088] When P(1 - 2%) ≤ P1 ≤ P(1 + 2%), this is the measurement tolerance range, and the actuator does not make any adjustments.

[0089] It should be noted that in this step, when P1 > P(1 + 2%), control the tension adjustment assembly 2 to work to increase the diameter of the adjustment ring a; when P1 < P(1 - 2%), control the tension adjustment assembly 2 to work to reduce the diameter of the adjustment ring a. In this way, the inner ring of the sealing ring 1 is always in sealed contact with the inner ring of the rotating shaft, ensuring the sealing effect.

[0090] Further, in the above steps, according to

[0091] Specifically, the actual temperature acting on the inner ring of the sealing ring 1 is set as T1, and the preset temperature acting on the inner ring of the sealing ring 1 is set as T; Step S20: When the adjustment parameter meets the preset condition, the steps of controlling the tension adjustment assembly 2 to work include:

[0092] Step 201b: When T1 > T(1 + 2%), control the tension adjustment assembly 2 to work to increase the diameter of the adjustment ring a;

[0093] It should be noted that in this step, K2 = T1 / T is set. Wherein, when 1.02 < K2, the displacement of the driving end 21a is L3, where L3 = c1x + d1, and both c1 and d1 are constants. The change in L3 will cause the coefficient K2 to change until the coefficient K2 returns to 0.98 ≤ K2 ≤ 1.02, and the displacement of L2 will stop changing.

[0094] Step 202b: When T1 < T(1 - 2%), control the tension adjustment assembly 2 to work and reduce the diameter of the adjustment ring a.

[0095] It should be noted that in this step, K2 = T1 / T is set. Wherein, when 0.98 < K2 < 1.02, the displacement of the driving end 21a is L4, where L4 = c2x + d2, both c2 and d2 are constants, and the change of L4 will cause the coefficient K2 to change until the coefficient K2 returns to 0.98 ≤ K2 ≤ 1.02, and the displacement of L2 stops changing.

[0096] When T(1 - 2%) ≤ T1 ≤ T(1 + 2%), at this time it is the measurement tolerance range, and the actuator does not make any adjustment.

[0097] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A shaft sealing structure, characterized in that, Comprising: A sealing ring, which is formed with an annular mounting groove; And A tension adjusting assembly, including an adjusting part, the two ends of the adjusting part are movably lapped to enclose an adjusting ring with an adjustable diameter, and the adjusting ring is installed in the annular mounting groove; A guiding structure is arranged between the two ends of the adjusting part that are lapped with each other. The guiding structure includes a guiding part extending along the circumferential direction of the annular mounting groove and a matching part adapted to the guiding part. Among the guiding part and the matching part, one is arranged at one end of the adjusting part, and the other is arranged at the other end of the adjusting part; and / or, among the two ends of the adjusting part that are lapped with each other, one end is a driving end and the other end is a fixed end. The driving end can slide relative to the fixed end. The shaft sealing structure further includes a driving assembly installed in the annular mounting groove for driving the driving end to slide; The guiding part includes a guiding hole, and the matching part includes a guiding strip adapted to the guiding hole; The shaft sealing structure further includes a sensor and a controller. The sensor is installed in the annular mounting groove and is electrically connected to the controller. The sensor is used to detect the temperature and / or pressure of the inner ring of the sealing ring. The controller is installed in the annular mounting groove for controlling the tension adjusting assembly to work through the adjustment parameters obtained by the sensor.

2. The shaft seal structure according to claim 1, characterized in that A plurality of tooth parts are arranged on the driving end, and the plurality of tooth parts are arranged at intervals along the circumferential direction of the annular mounting groove. The driving assembly includes a driving motor, the driving motor has a driving shaft extending along the axial direction of the annular mounting groove, and a driving gear is sleeved on the driving shaft. The driving gear can selectively mesh with some of the plurality of tooth parts.

3. The shaft seal structure according to claim 1, characterized in that, The sensor includes a temperature sensor, and a plurality of temperature sensors are arranged. The plurality of temperature sensors are arranged at intervals along the circumferential direction of the annular mounting groove.

4. The shaft seal structure according to claim 3, characterized in that, The sensor includes a pressure sensor, and a plurality of pressure sensors are arranged. The plurality of pressure sensors are all arranged at intervals along the circumferential direction of the annular mounting groove; and / or The temperature sensor and the pressure sensor are integrated.

5. A shaft seal control method, based on the shaft seal structure according to any one of claims 1 to 4, characterized in that, The shaft sealing control method includes the following steps: Obtain the adjustment parameters of the sealing ring in real time; When the adjustment parameters meet the preset conditions, control the tension adjusting assembly to work.

6. The shaft seal control method according to claim 5, characterized in that, The adjustment parameters include the actual pressure acting on the inner ring of the sealing ring and / or the actual temperature of the inner ring of the sealing ring.

7. The shaft seal control method according to claim 6, wherein Set the actual pressure acting on the inner ring of the sealing ring as P1, and set the preset pressure acting on the inner ring of the sealing ring as P; The step of controlling the tension adjusting assembly to work when the adjustment parameters meet the preset conditions includes: When P1 > P(1 + 2%), control the tension adjusting assembly to work to increase the diameter of the adjusting ring; When P1 < P(1 - 2%), control the tension adjusting assembly to work to reduce the diameter of the adjusting ring; When P(1 - 2%) ≤ P1 ≤ P(1 + 2%), this is the measurement tolerance range, and the actuator does not make any adjustment.

8. The shaft seal control method according to claim 6, wherein Set the actual temperature acting on the inner ring of the sealing ring as T1, and set the preset temperature acting on the inner ring of the sealing ring as T; The step of controlling the tension adjustment assembly to work when the adjustment parameter meets the preset condition includes: When T1 > T(1 + 2%), control the tension adjustment assembly to work to increase the diameter of the adjustment ring; When T1 < T(1 - 2%), control the tension adjustment assembly to work to reduce the diameter of the adjustment ring; When T(1 - 2%) ≤ T1 ≤ T(1 + 2%), this is the measurement tolerance range, and the actuator does not make any adjustment.

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