A sealing ring excitation structure based on the combination of a curved slideway and a push rod

Abstract

The present invention discloses a seal ring excitation structure based on a combination of a curved slideway and a push rod, which includes a seal ring assembly, a push rod assembly, a push rod guide ring, a curved slideway ring, a thrust bearing, a support base and a drive assembly. The push rod assembly, the curved slideway ring and the thrust bearing are sequentially arranged below the seal ring assembly. The thrust bearing and the push rod guide ring are arranged on the support base. The push rod guide ring is provided with a guide hole. The upper surface of the curved slideway ring is provided with multiple groups of curved slideways distributed periodically. Each group of curved slideways includes a slideway peak, a slideway valley and a slideway slope therebetween. The push rod assembly includes a push rod and a ball. The ball is in contact with the curved slideway and can achieve rolling friction. The drive assembly drives the curved slideway ring to rotate. By using the cooperation of the curved slideway and the push rod assembly, the present invention can apply axial disturbing forces, disturbing displacements and angular disturbing displacements with accurately controllable frequencies and amplitudes to the seal ring assembly, and simulate various external excitation forms received by the seal ring in actual engineering.

Description

Technical Field

[0001] The invention belongs to the technical field of end face seal measurement and control, and relates to a mechanical seal excitation structure, in particular to a mechanical seal excitation structure caused by simulating shaft vibration. Background Art

[0002] Mechanical seals are widely used in rotating equipment such as centrifugal pumps, compressors and agitators due to their advantages of small end face wear, long service life and low leakage rate. During the operation of rotating equipment, the shaft end mechanical seal is often subject to various external disturbances, such as axial movement or angular deflection of the rotating shaft, vibration of the solid casing, etc. Among them, the influence of the rotating shaft vibration is the most significant. If the mechanical seal cannot adapt well to the external vibration, it is easy to fail due to excessive end face wear or excessive leakage of the medium. When the mechanical seal is a flexible installation structure of the static ring, the dynamic ring is fixed to the rotating shaft. At this time, the axial movement or angular deflection of the rotating shaft will be directly transmitted to the dynamic ring. At this time, the external disturbances to which the mechanical seal is subjected are axial displacement excitation and angular displacement excitation respectively; when the mechanical seal is a flexible installation structure of the dynamic ring, the dynamic ring is floatingly installed on the rotating shaft. At this time, the axial movement or angular deflection of the rotating shaft mainly acts on the dynamic ring indirectly by changing the spring force or the friction force of the auxiliary sealing ring. At this time, the external disturbance to which the mechanical seal is subjected is force excitation. It is necessary to accurately simulate the excitation force and displacement of the rotating shaft on the mechanical seal in the laboratory simulated working condition test, and then study the influence of the rotating shaft vibration on the performance of the mechanical seal.

[0003] At present, there are excitation devices in mechanical seals that can be used to simulate external disturbances. A pressure regulating chamber is added to the back of the sealing ring. During the test, pressurized gas is introduced into the pressure regulating chamber to apply an axial closing force to the sealing ring; or an exciter is added to the bottom of the sealing ring to excite the bottom of the sealing ring at a preset frequency to simulate the disturbance condition. However, the disturbances under actual working conditions are usually sudden and random. The pressure regulating chamber added to the back of the sealing ring can only give axial force disturbances by slowly pressurizing; and the exciter is often expensive, has a fixed frequency, and can only give excitation at a certain point, making it difficult to achieve simultaneous excitation of multiple locations of the entire sealing ring. Whenever the disturbance form needs to be changed, the test bench needs to be disassembled and assembled, which is not only cumbersome to operate, but also very easy to cause damage to the test platform and the exciter, increasing the cost. It can be seen from this that it is necessary to develop a mechanical seal ring excitation structure with a simple structure and diverse excitation forms. Summary of the invention

[0004] In view of the problems of single excitation form and inconvenient regulation in the existing mechanical seal external excitation simulation scheme, the present invention provides a sealing ring excitation structure based on a curved slideway and a push rod combination with simple structure, convenient operation and various excitation forms. The technical solution of the present invention is:

[0005] A sealing ring excitation structure based on the combination of a curved slideway and a push rod, comprising a sealing ring assembly and an excitation assembly. The excitation assembly includes a push rod assembly, a push rod guide ring, a curved slideway ring, a thrust bearing, a support base, and a drive assembly. Below the sealing ring assembly, there are successively arranged a push rod assembly, a curved slideway ring, and a thrust bearing. The thrust bearing and the push rod guide ring are placed on the support base. The push rod guide ring is evenly provided with guide holes through which the push rod assembly can pass. The upper surface of the curved slideway ring is provided with multiple groups of curved slideways that are periodically and evenly distributed. The lower end of the push rod assembly is in contact with the curved slideways. The drive assembly is fixed on the support base, and the drive motor in the drive assembly drives the rotation of the curved slideway ring through key transmission, thereby realizing the excitation effect of the push rod assembly on the sealing ring assembly. The support base is fixed on the bottom plate through a support rod.

[0006] Further, each group of curved slideways includes a slideway peak, a slideway valley, and a slideway slope therebetween. The push rod assembly includes a push rod and a ball below. The ball is in contact with the curved slideway and can achieve rolling friction.

[0007] Further, the waveform of each group of curved slideways is one of a sine wave, a triangular wave, or a rectangular wave.

[0008] Further, the push rod guide ring is fixed to the upper end face of the support base by screws. There is a gap between the guide holes on the push rod guide ring and the push rod, and the range of the gap is 0.05 - 0.1 mm.

[0009] Further, the thrust bearing includes an upper bearing seat, a lower bearing seat, and inner balls located therebetween. The lower bearing seat is placed on the inner ring end face of the support base and remains stationary. The curved slideway ring is arranged on the upper bearing seat and rotates with the upper bearing seat. The inner balls are used to reduce the rotational resistance of the upper bearing seat.

[0010] Further, the sealing ring assembly includes a sealing ring and an auxiliary ring. The auxiliary ring is fixed below the sealing ring by fastening screws. The upper part of the push rod is in contact with the lower end face of the auxiliary ring.

[0011] Further, the number of the push rod assemblies is 3, and the number of the curved slideways is a multiple of 3. The preferred number is 6 - 18. The balls of the 3 push rod assemblies can be simultaneously located at the slideway peak or the slideway valley positions to realize the axial excitation of the sealing ring.

[0012] Further, the number of the push rod assemblies is 3, and the number of the curved slideways is not a multiple of 3. The balls of the 3 push rod assemblies are not simultaneously located at the slideway peak or the slideway valley to realize the angular excitation of the sealing ring.

[0013] Further, the seal ring assembly includes a seal ring, a compression spring, a spring seat and an auxiliary seal ring. The compression spring is located between the upper end face of the spring seat and the seal ring. The auxiliary seal ring is located between the outer cylindrical surface of the spring seat and the seal ring. The upper part of the ejector rod is in contact with the lower end face of the spring seat. The balls of all the ejector rod assemblies can be located at the slideway peak or the slideway valley position simultaneously.

[0014] Further, a key groove for mating with a flat key is provided on the inner side of the curved slideway ring. Through the cooperation of the flat key and the key groove, the driving motor drives the rotation of the curved slideway ring.

[0015] The working principle of the present invention is as follows:

[0016] When the present invention is used to apply displacement excitation or force excitation to the seal ring assembly, an ejector rod assembly, a curved slideway ring, a thrust bearing and a fixed support base are successively arranged below the seal ring assembly. The support base is fixed on the lower base plate, and the driving motor is fixed on the support base. The driving motor can drive the curved slideway ring to rotate synchronously through key transmission, and the rotation speed of the curved slideway ring can be changed by changing the rotation speed of the driving motor. The thrust bearing is composed of an upper bearing seat, a lower bearing seat and inner balls located between the two. The lower bearing seat is placed above the support base and remains stationary. The upper bearing seat serves as the mounting seat of the curved slideway ring and rotates therewith. The inner balls enable the upper bearing seat to rotate with very low resistance. The key of the present invention lies in that a plurality of groups of curved slideways with periodic distribution are provided on the upper surface of the curved slideway ring. The waveform of each group of curved slideways can be a sine wave, a triangular wave or a rectangular wave, so as to apply different excitation forms to the seal ring assembly. For example, for the sine wave or triangular wave curved slideways, each group of curved slideways includes a slideway peak, a slideway valley and a slideway slope therebetween. The excitation amplitude can be adjusted by changing the height difference between the slideway peak and the slideway valley, and the excitation frequency can be determined by the number of groups and the rotation speed of the curved slideways. The ejector rod assembly is located between the curved slideway ring and the seal ring assembly. The ejector rod assembly is composed of an ejector rod above and balls below. The balls are in contact with the curved slideway to achieve rolling friction, thereby avoiding serious wear between the lower part of the ejector rod and the curved slideway during relative movement. The upper end of the ejector rod is in contact with the lower end face of the seal ring assembly and drives the seal ring assembly to move. Generally, the upper part of the ejector rod is also designed as a spherical structure so that the contact between the ejector rod and the seal ring assembly is a point contact. A plane can be determined by three points. Therefore, the number of the ejector rod assemblies is preferably 3 and they are evenly distributed along the circumferential direction. When the balls in the ejector rod assembly are located at the slideway peak, the corresponding point of the seal ring assembly is at the highest position; on the contrary, when the balls in the ejector rod assembly are located at the slideway valley, the corresponding point of the seal ring assembly is at the lowest position. In order to enable the ejector rod assembly to keep vertical as much as possible during operation and not tilt, an ejector rod guide ring is also fixed above the support base. A guide hole for the ejector rod assembly to pass through is machined on the ejector rod guide ring, and there is a small radial clearance between the guide hole and the ejector rod to facilitate installation.

[0017] When an axial displacement excitation needs to be applied to the seal ring assembly, the seal ring assembly includes a seal ring and an auxiliary ring. The auxiliary ring is fixed below the seal ring by fastening screws, and the upper part of the ejector rod is in contact with the lower end face of the auxiliary ring. The number of curved slideways needs to be a multiple of 3, so that the balls in the three ejector rod assemblies can be at the same height position in each group of curved slideways, such as being at the slideway peak or the slideway valley at the same time. When the curved slideway ring rotates, the ejector rod assembly can make each point on the circumference of the auxiliary ring perform synchronous axial reciprocating motion, thereby realizing the regulation of the axial displacement excitation of the seal ring.

[0018] When an angular displacement excitation needs to be applied to the seal ring assembly, the difference from the axial displacement excitation scheme is that the number of curved slideways cannot be a multiple of 3, so that the balls in the three ejector rod assemblies will not be at the same height position in each group of curved slideways at the same time. When the curved slideway ring rotates, each point on the circumference of the auxiliary ring shows an angular deflection motion under the drive of the three ejector rod assemblies, thereby realizing the regulation of the angular displacement excitation of the seal ring.

[0019] When an axial force excitation needs to be applied to the seal ring assembly, the difference from the axial displacement excitation scheme is that the seal ring assembly includes a seal ring, a compression spring, a spring seat and an auxiliary sealing ring. The compression spring is located between the upper end face of the spring seat and the seal ring, the auxiliary sealing ring is located between the outer cylindrical surface of the spring seat and the spring seat, and the upper part of the ejector rod is in contact with the lower end face of the spring seat. When the curved slideway ring rotates, the ejector rod assembly can make each point on the circumference of the spring seat perform synchronous axial reciprocating motion. On the one hand, this will change the spring compression amount and thus change the spring force on the seal ring. On the other hand, it will change the axial force of the seal ring through the friction force of the auxiliary sealing ring, thereby realizing the regulation of the axial force excitation of the seal ring.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] (1) It can accurately simulate various excitation modes such as axial force excitation, axial displacement excitation and angular displacement excitation from the rotating shaft during the actual operation of the mechanical seal, and can realize different excitation waveforms such as sine wave, rectangular wave and triangular wave through the design of the curved slideway, providing a reliable test platform for the experimental study on the influence of the rotating shaft excitation on the performance of the mechanical seal;

[0022] (2) The overall structure is compact and the excitation regulation is convenient. By changing the rotation speed of the drive motor, the regulation of the excitation frequency can be realized, and by adopting curved slideways with different peak-to-valley values, the regulation of the excitation amplitude can be realized;

[0023] (3) In the design of the friction pair between the ejector rod and the curved surface slideway, the rolling friction between the ball and the curved surface slideway is used to replace the slideway friction. On the one hand, it can reduce the friction and wear between the ejector rod assembly and the curved surface slideway during operation. On the other hand, it also makes the movement of the ejector rod more stable, thereby providing a more accurate excitation for the sealing ring. Brief Description of the Drawings

[0024] Figure 1 is the three-dimensional structural decomposition schematic diagram of the excitation assembly according to the embodiment of the present invention;

[0025] Figure 2 is the structural sectional view of the excitation assembly according to the embodiment of the present invention;

[0026] Figure 3 is the three-dimensional structural schematic diagram of the curved surface slideway ring according to the embodiment of the present invention;

[0027] Figure 4 is the sectional view of the ejector rod assembly and the sealing ring assembly when applying axial displacement excitation according to the first embodiment of the present invention;

[0028] Figure 5 is the sectional view of the ejector rod assembly and the sealing ring assembly when applying angular displacement excitation according to the second embodiment of the present invention;

[0029] Figure 6 is the sectional view of the ejector rod assembly and the sealing ring assembly when applying axial force excitation according to the third embodiment of the present invention;

[0030] Figure 7 is the force analysis diagram of the sealing ring when applying axial force excitation according to the third embodiment of the present invention.

[0031] In the figure: 1, ejector rod guide ring; 11, ejector rod assembly; 111, ball; 112, ejector rod; 12, guide hole; 2, curved surface slideway ring; 21, curved surface slideway; 211, slideway slope; 22, keyway; 23, slideway peak; 24, slideway valley; 3, thrust bearing; 4, support base; 42, support rod; 5, drive assembly; 51, flat key; 52, drive motor; 53, lock nut; 6, sealing ring assembly; 61, sealing ring; 62, auxiliary ring; 63, fastening screw; 64, compression spring; 65, spring seat; 66, auxiliary sealing ring; 7, bottom plate. Detailed Embodiments

[0032] The present invention will be further described below in conjunction with the accompanying drawings of the specification and embodiments, but the protection scope of the present invention is not limited thereto.

[0033] Embodiment 1

[0034] Refer to Figure 1 , 2, 3, and 4, a sealing ring excitation structure based on the combination of a curved slideway and a push rod, comprising a push rod guide ring 1, a push rod assembly 11, a curved slideway ring 2, a thrust bearing 3, a support base 4, a drive assembly 5, and a sealing ring assembly 6. The sealing ring assembly 6, as the excitation object, is located at the topmost position. Below it, the push rod assembly 11, the curved slideway ring 2, the thrust bearing 3, and the support base 4 are successively installed. The support base 4 serves as the mounting base for the push rod guide ring 1, the thrust bearing 3, and the drive assembly 5, and is fixed to the support rod 42 by a locking nut 53. The support rod 42 is fixed to the bottom plate 7.

[0035] The drive assembly 5 includes a drive motor 52 and a flat key 51. The drive motor 52 is fixed to the lower part of the support base 4. The power output shaft of the drive motor 52 drives the curved slideway ring 2 to rotate through the flat key 51. The rotation speed of the curved slideway ring 2 can be adjusted by changing the rotation speed of the drive motor 52, thereby adjusting the excitation frequency.

[0036] The thrust bearing 3 consists of an upper bearing seat, a lower bearing seat, and inner ball bearings located between the two. The lower part of the thrust bearing 3 is placed above the inner ring of the support base 4 and remains relatively stationary with it. The upper part of the thrust bearing 3 serves as the mounting base for the curved slideway ring 2 and rotates with it. Inner ball bearings are provided between the upper bearing seat and the lower bearing seat of the thrust bearing 3, enabling the upper bearing seat to rotate relative to the lower bearing seat with very little resistance.

[0037] The curved slideway ring 2, as the core component of the present invention, has its lower end surface in contact with the upper bearing seat of the thrust bearing 3. A plurality of groups of curved slideways 21 are periodically distributed on the upper end surface of the curved slideway ring 2. Each group of curved slideways 21 includes a slideway peak 23, a slideway valley 24, and a slideway slope 211 therebetween. The waveform of each group of curved slideways 21 can be a sine wave, a triangular wave, or a rectangular wave. The amplitude of the excitation received by the sealing ring assembly 6 can be regulated by changing the height difference between the slideway peak 23 and the slideway valley 24. The number of the curved slideways 21 is a multiple of 3, and preferably the number is 6 - 18. A keyway 22 cooperating with the flat key 51 is provided inside the curved slideway ring 2. Through the cooperation of the flat key 51 and the keyway 22, the drive motor 52 drives the rotation of the curved slideway ring 2.

[0038] The ejector rod assembly 11 includes an ejector rod 112 and a lower ball 111. The ball 111 remains in contact with the curved slideway 21 and realizes rolling friction, thereby reducing the frictional wear between the curved slideway 21 and the ejector rod assembly 11 during the rotation of the curved slideway ring 2. The upper end of the ejector rod 112 is in contact with the lower end face of the seal ring assembly 6. The structure of its upper end is generally spherical so that the contact between the ejector rod 112 and the seal ring assembly 6 is a point contact, which is beneficial for the ejector rod 112 to control the displacement of the seal ring assembly 6. Since three points can determine a plane, the number of ejector rod assemblies 11 is preferably three and they are evenly distributed circumferentially. The balls 111 of the three ejector rod assemblies 11 can be simultaneously located at the slideway peak 23 or the slideway valley 24, thereby realizing the axial excitation of the seal ring assembly 6.

[0039] In order to enable the ejector rod assembly 11 to always maintain a vertical state during operation without skew, an ejector rod guide ring 1 is fixed on the upper end face of the support base 4. The ejector rod guide ring 1 is evenly provided with guide holes 12 through which multiple ejector rod assemblies can pass. There is a radial gap between the guide holes 12 and the ejector rod 112, and the preferred value of this gap is 0.05 - 0.1 mm.

[0040] The seal ring assembly 6 includes a seal ring 61 and an auxiliary ring 62. The auxiliary ring 62 is fixed below the seal ring 61 by fastening screws 63. The lower end face of the auxiliary ring 62 is always in contact with the upper end of the ejector rod 112. The reciprocating movement of the ejector rod 112 can be converted into the reciprocating displacement movement of the auxiliary ring 62 and the seal ring 61, thereby realizing the precise simulation of the axial displacement excitation received by the mechanical seal in engineering practice. The amplitude of this displacement excitation can be adjusted by the height difference between the slideway peak 23 and the slideway valley 24 of the curved slideway 21, and the frequency of the displacement excitation can be realized by changing the rotational speed of the drive motor 52 or selecting different groups of curved slideway rings 2 of the curved slideway 21. This embodiment is mainly used to simulate the situation of a mechanical seal with a flexible installation of the stationary ring when it is disturbed by the axial displacement of the rotating shaft.

[0041] Embodiment Two

[0042] Reference Figure 5 In this embodiment, the difference from Embodiment One is that the number of curved slideways 21 is not a multiple of three, and the balls 111 of the three ejector rod assemblies 11 cannot be simultaneously located at the slideway peak 23 or the slideway valley 24, that is, at the same moment, the three ejector rod assemblies 11 are at different height positions, thereby realizing the angular displacement excitation of the seal ring 61. This embodiment is mainly used to simulate the situation of a mechanical seal with a flexible installation of the stationary ring when it is disturbed by the angular yaw of the rotating shaft.

[0043] Embodiment Three

[0044] Reference Figure 6 、 7, the difference between this embodiment and the first embodiment is that: the seal ring assembly 6 includes a seal ring 61, a compression spring 64, a spring seat 65 and an auxiliary seal ring 66. The compression spring 64 is located between the upper end face of the spring seat 65 and the seal ring 61, the auxiliary seal ring 66 is located between the outer cylindrical surface of the spring seat 65 and the seal ring 61, and the upper end of the ejector rod 112 is in contact with the lower end face of the spring seat 65. When the three ejector rod assemblies drive the spring seat 65 to move up and down reciprocally, on the one hand, this changes the deformation amount of the compression spring 64, and further changes the spring force acting on the back of the seal ring 61 F sp ; on the other hand, the axial force of the seal ring 61 is changed by the change of the friction force of the auxiliary seal ring 66 F f . This embodiment is mainly used to simulate the situation of a mechanical seal with a flexible installation of the dynamic ring when it is disturbed by the axial displacement of the rotating shaft.

[0045] The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention also extends to equivalent technical means that those skilled in the art can think of according to the inventive concept of the present invention.

Claims

1. A sealing ring excitation structure based on a combination of a curved slideway and a push rod, characterized in that: It includes a seal ring assembly (6) and an excitation assembly. The excitation assembly includes a push rod assembly (11), a push rod guide ring (1), a curved slideway ring (2), a thrust bearing (3), a support base (4) and a drive assembly (5). Below the seal ring assembly (6), there are successively arranged a push rod assembly (11), a curved slideway ring (2) and a thrust bearing (3). The thrust bearing (3) and the push rod guide ring (1) are arranged on the support base (4). There are 3 push rod assemblies (11). The push rod guide ring (1) is evenly provided with guide holes (12) through which the push rod assemblies (11) can pass. The upper surface of the curved slideway ring (2) is provided with multiple groups of curved slideways (21) that are periodically and evenly distributed. The lower end of the push rod assembly (11) is in contact with the curved slideway (21). The drive assembly (5) is fixed on the support base (4). The drive motor (52) in the drive assembly (5) drives the curved slideway ring (2) to rotate through a flat key (51), so as to realize the excitation effect of the push rod assembly (11) on the seal ring assembly (6). The support base (4) is fixed on the bottom plate (7) through a support rod (42). Each group of curved slideways (21) includes a slideway peak (23), a slideway valley (24) and a slideway slope (211) therebetween.

2. The sealing ring excitation structure based on the combination of a curved slideway and a push rod according to claim 1, characterized in that: The push rod assembly (11) includes a push rod (112) and a ball (111) below. The ball (111) is in contact with the curved slideway (21) and can realize rolling friction.

3. The sealing ring excitation structure based on the combination of a curved slideway and a push rod according to claim 2, characterized in that: The waveform of each group of curved slideways (21) is one of a sine wave, a triangular wave or a rectangular wave.

4. A seal ring excitation structure based on a combination of a curved slideway and a push rod according to claim 1, characterized in that: The push rod guide ring (1) is fixed to the upper end surface of the support base (4) by screws. There is a gap between the guide hole (12) on the push rod guide ring (1) and the push rod (112). The range of the gap is 0.05 - 0.1 mm.

5. A seal ring excitation structure based on a combination of a curved slideway and a push rod according to claim 1, characterized in that: The thrust bearing (3) includes an upper bearing seat, a lower bearing seat and inner balls located therebetween. The lower bearing seat is placed on the inner ring end surface of the support base (4) and remains stationary. The curved slideway ring (2) is arranged on the upper bearing seat and rotates with the upper bearing seat. The inner balls are used to reduce the rotational resistance of the upper bearing seat.

6. The sealing ring excitation structure based on the combination of a curved slideway and a push rod according to claim 2, characterized in that: The seal ring assembly (6) includes a seal ring (61) and an auxiliary ring (62). The auxiliary ring (62) is fixed below the seal ring (61) by fastening screws (63). The upper part of the push rod (112) is in contact with the lower end surface of the auxiliary ring (62).

7. The sealing ring excitation structure based on the combination of a curved slideway and a push rod according to claim 6, characterized in that: The number of the curved slideways (21) is a multiple of 3. The balls (111) of the 3 push rod assemblies (11) can be simultaneously located at the slideway peak (23) or the slideway valley (24) to realize the axial excitation of the seal ring (61).

8. A seal ring excitation structure based on a combination of a curved slideway and a push rod according to claim 6, characterized in that: The number of the curved slideways (21) is not a multiple of 3. The balls (111) of the 3 push rod assemblies (11) cannot be simultaneously located at the slideway peak (23) or the slideway valley (24), so as to realize the angular excitation of the seal ring (61).

9. The sealing ring excitation structure based on the combination of a curved slideway and a push rod according to claim 2, wherein: The seal ring assembly (6) includes a seal ring (61), a compression spring (64), a spring seat (65), and an auxiliary seal ring (66). The compression spring (64) is located between the upper end surface of the spring seat (65) and the seal ring (61). The auxiliary seal ring (66) is located between the outer cylindrical surface of the spring seat (65) and the seal ring (61). The upper part of the ejector rod (112) is in contact with the lower end surface of the spring seat (65). The balls (111) of all the ejector rod assemblies (11) can be simultaneously located at the position of the slideway peak (23) or the slideway valley (24).

10. A seal ring excitation structure based on a combination of a curved slideway and a push rod according to claim 1, characterized in that: A keyway (22) adapted to a flat key (51) is provided on the inner side of the curved slideway ring (2). Through the cooperation of the flat key (51) and the keyway (22), the driving motor (52) drives the rotation of the curved slideway ring (2).

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