Mechanical seal structure and pump equipment

Abstract

The utility model provides a mechanical sealing structure and pump equipment, and relates to the technical field of mechanical sealing, the mechanical sealing structure comprises a shaft sleeve, a static ring assembly, a movable ring assembly and an elastic compensation mechanism, the static ring assembly comprises a static ring and a first sealing piece arranged between the static ring and a gland; the movable ring assembly comprises a movable ring, a second sealing piece arranged between the movable ring and the shaft sleeve, and a first connecting part; the elastic compensation mechanism is arranged between the shaft sleeve and the movable ring, detachably connected with the first connecting part and used for pushing the movable ring to slide in the axial direction of the rotating shaft so that the movable ring and the static ring can be attached and sealed. The movable ring can stably abut against the static ring through the elastic compensation mechanism, the stability of the sealing effect is guaranteed, impact borne by the movable ring can be reduced in the using process, the problem that the movable ring is damaged or blocked is solved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, especially mechanical seal structure and pump equipment. BACKGROUND

[0002] In petroleum chemical industry, high pressure fluid delivery, hydraulic system and many industrial fields, the equipment often needs to run in high pressure environment, so that the mechanical seal performance requirement is extremely strict. However, the existing high pressure mechanical seal has many deficiencies: (1) poor sealing stability: the existing mechanical seal is deformed under high pressure condition, and the sealing gap changes, thereby causing leakage problem, and the unstable performance seriously affects the reliability and safety of the system. (2) unreliable transmission structure: high pressure medium makes the friction between the sealing surfaces increase, and the torque of the spring seat transmitted to the dynamic ring also increases, and the existing impeller transmission mode will generate great impact on the dynamic ring, which is easy to cause damage or jam of the dynamic ring, cannot effectively compensate, is easy to cause sealing failure, reduces the service life of the sealing structure, and increases the subsequent maintenance cost and downtime. Therefore, how to improve the sealing reliability and service life of the sealing structure has become a technical problem to be solved at present. SUMMARY

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the utility model embodiment is to provide a mechanical seal structure and pump equipment for improving the sealing reliability and service life.

[0004] The above-mentioned purpose of the utility model can be realized by the following technical scheme, and the utility model provides a mechanical seal structure for being arranged between a gland and a rotating shaft, comprising:

[0005] A shaft sleeve is arranged on the rotating shaft.

[0006] A static ring assembly comprises a static ring arranged on the gland, and a first sealing element arranged between the static ring and the gland.

[0007] A dynamic ring assembly comprises a dynamic ring sleeved on the shaft sleeve, a second sealing element arranged between the dynamic ring and the shaft sleeve, and a first connecting portion arranged on the dynamic ring.

[0008] An elastic compensation mechanism is arranged between the shaft sleeve and the dynamic ring, the elastic compensation mechanism is detachably connected with the first connecting portion, and the elastic compensation mechanism is used for pushing the dynamic ring to slide along the axial direction of the rotating shaft to make the dynamic ring and the static ring fit and seal.

[0009] In a preferred embodiment of the utility model, the elastic compensation mechanism comprises a mounting seat, an elastic member arranged between the mounting seat and the dynamic ring, and a second connecting part arranged on the mounting seat, the first connecting part can slide along the axial direction of the second connecting part and is limited in the circumferential direction by the second connecting part.

[0010] In a preferred embodiment of the utility model, a sliding groove adjusting mechanism is arranged between the first connecting part and the second connecting part, the sliding groove adjusting mechanism comprises a sliding part arranged on the first connecting part and a sliding groove structure arranged on the second connecting part, the sliding part can be connected to the sliding groove structure, the sliding groove structure can provide the sliding part with axial freedom and limit the sliding part in the circumferential direction.

[0011] In a preferred embodiment of the utility model, the sliding groove structure comprises a first sliding groove arranged on the second connecting part along the axial direction of the rotating shaft, a second sliding groove arranged along the circumferential direction of the rotating shaft, and a third sliding groove arranged along the axial direction of the rotating shaft, the two ends of the second sliding groove are connected to the first sliding groove and the third sliding groove respectively, the two ends of the third sliding groove are arranged on the two sides of the second sliding groove respectively, and one end of the first sliding groove penetrates the second connecting part to form an opening for the sliding part to enter.

[0012] In a preferred embodiment of the utility model, a plurality of sliding groove structures are arranged, the plurality of sliding groove structures are arranged in the form of a ring and are spaced apart along the circumferential direction of the rotating shaft, and the sliding part is arranged corresponding to the sliding groove structure.

[0013] In a preferred embodiment of the utility model, the first connecting part comprises a reinforcing ring sleeved on the dynamic ring, the sliding part is arranged on the reinforcing ring, the second connecting part comprises a mounting ring arranged in an integrated mode with the mounting seat, the mounting ring is arranged on the outer side of the reinforcing ring, and the sliding groove structure is arranged on the mounting ring.

[0014] In a preferred embodiment of the utility model, the sliding part comprises a pin connected to the reinforcing ring, at least part of the pin protrudes from the reinforcing ring and is slidably arranged in the sliding groove structure.

[0015] In a preferred embodiment of the utility model, the mechanical seal structure further comprises a push ring, the push ring is movably arranged in the mounting ring and is arranged between the elastic member and the dynamic ring.

[0016] In a preferred embodiment of the utility model, the elastic member comprises at least one spring arranged between the mounting seat and the dynamic ring, and at least one clamping groove is arranged on the mounting seat to accommodate the spring.

[0017] In a preferred embodiment of the utility model, the mechanical seal mechanism further includes fastening screw, the mounting base is fixed to the shaft sleeve through the fastening screw.

[0018] In a preferred embodiment of the utility model, the static ring is equipped with first sealing end face, the dynamic ring is equipped with second sealing end face, the first sealing end face can be sealed with the second sealing end face.

[0019] The utility model discloses still provide a kind of pump equipment, including pump cover, gland, rotating shaft and the mechanical seal structure of preceding, the pump cover with the gland is connected, the accommodating cavity for accommodating the mechanical seal structure is formed between the pump cover with the gland.

[0020] In a preferred embodiment of the utility model, the end of the shaft sleeve is equipped with locking disc, the shaft sleeve is fixed on the rotating shaft through the locking disc, and a third sealing member is arranged between the shaft sleeve and the rotating shaft.

[0021] In a preferred embodiment of the utility model, a fourth sealing member is arranged between the gland and the pump cover, and a throttling bushing is arranged between the gland and the shaft sleeve.

[0022] The technical scheme of the utility model has the following remarkable beneficial effects:

[0023] When the mechanical seal structure is used, the mechanical seal structure is arranged between the gland and the rotating shaft to play a sealing role. The shaft sleeve is sleeved on the rotating shaft to serve as a mounting base of the dynamic ring assembly and the elastic compensation mechanism, and the static ring assembly is arranged on the gland. The elastic compensation mechanism and the first connecting portion on the dynamic ring can be detachably connected, thereby helping to improve the installation efficiency of the dynamic ring. When the dynamic ring is damaged or needs to be replaced, the dynamic ring can be easily detached, and the maintenance efficiency is improved.

[0024] Moreover, the dynamic ring can be stably abutted on the static ring by means of the elastic action of the elastic compensation mechanism, so that the dynamic ring is prevented from accidentally coming off during transportation and assembly, and the assembly stability is ensured. Moreover, when the elastic compensation mechanism is connected to the first connecting portion on the dynamic ring, the elastic compensation mechanism can transmit force to the dynamic ring by means of the first connecting portion, so that the force is not directly applied to the dynamic ring, the dynamic ring is not damaged, and the sealing is not affected even if the pump is frequently started and stopped.

[0025] When the elastic compensation mechanism is connected to the first connecting portion on the dynamic ring, the elastic compensation mechanism can push the dynamic ring to slide along the axial direction of the rotating shaft so that the dynamic ring is sealed with the static ring. The dynamic ring and the static ring can be stably sealed by means of the elastic compensation action of the elastic compensation mechanism, so that the sealing gap between the dynamic ring and the static ring is prevented from changing, and the stability of the sealing effect is ensured.

[0026] And the elastic compensation mechanism can provide a larger elastic adjustment amount for the dynamic ring, and through the elastic compensation effect, it is helpful to reduce the impact on the dynamic ring in use, avoids the problem that the dynamic ring is damaged or stuck, and improves the service life of the mechanical seal structure. Especially when the mechanical seal structure is in high pressure working condition, the mechanical seal structure has better sealing reliability and service life. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0028] The drawings described herein are for illustrative purposes only, and are not intended to limit the scope of the present application in any way. In addition, the shape and scale of the components in the drawings are only illustrative, and are used to help understand the present application, and are not specifically limited to the shape and scale of the components. Those skilled in the art can select various possible shapes and scales to implement the present application according to specific conditions under the guidance of the present application.

[0029] Figure 1 A cross-sectional view of an embodiment of the mechanical seal structure of the present application;

[0030] Figure 2 A perspective structural schematic view of an embodiment of the mounting seat of the present application;

[0031] Figure 3 A perspective structural schematic view of an embodiment of the reinforcing ring of the present application.

[0032] Reference signs of the above drawings:

[0033] 10, gland;

[0034] 20, shaft;

[0035] 30, pump cover;

[0036] 100, shaft sleeve; 110, locking disc; 120, third sealing element;

[0037] 200, static ring; 210, first sealing element;

[0038] 300, dynamic ring; 310, second sealing element; 320, reinforcing ring; 330, pin;

[0039] 400, mounting seat; 410, mounting ring; 420, elastic member; 430, push ring; 440, fastening screw;

[0040] 500, sliding groove structure; 510, first sliding groove; 520, second sliding groove; 530, third sliding groove;

[0041] 600, fourth sealing member;

[0042] 700, throttle bushing. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] Embodiment one

[0045] Please refer to Figure 1 , Figure 2 and Figure 3 , the embodiment of the present application provides a mechanical seal structure for being arranged between a gland 10 and a rotating shaft 20, which comprises a shaft sleeve 100, a static ring assembly, a dynamic ring assembly and an elastic compensation mechanism. The shaft sleeve 100 is arranged on the rotating shaft 20. The static ring assembly comprises a static ring 200 arranged on the gland 10 and a first sealing member 210 arranged between the static ring 200 and the gland 10. The dynamic ring assembly comprises a dynamic ring 300 sleeved on the shaft sleeve 100, a second sealing member 310 arranged between the dynamic ring 300 and the shaft sleeve 100, and a first connecting part arranged on the dynamic ring 300. The elastic compensation mechanism is arranged between the shaft sleeve 100 and the dynamic ring 300, and the elastic compensation mechanism is detachably connected with the first connecting part. The elastic compensation mechanism is used to push the dynamic ring 300 to slide along the axial direction of the rotating shaft 20 so as to make the dynamic ring 300 and the static ring 200 adhere to each other and seal.

[0046] Overall, when the mechanical seal structure is used, the mechanical seal structure is arranged between the gland 10 and the rotating shaft 20 to play a sealing role. The shaft sleeve 100 is sleeved on the rotating shaft 20 to serve as a mounting basis of the dynamic ring assembly and the elastic compensation mechanism, and the static ring assembly is arranged on the gland 10. The elastic compensation mechanism and the first connecting part on the dynamic ring 300 can be detachably connected, thereby helping to improve the installation efficiency of the dynamic ring 300. Moreover, when the dynamic ring 300 is damaged or needs to be replaced, the dynamic ring 300 can also be easily detached, thereby improving the maintenance efficiency.

[0047] And, by means of the elastic effect of the elastic compensation mechanism, the dynamic ring 300 can be stably abutted on the static ring 200, the dynamic ring 300 is prevented from being accidentally separated out during transportation and assembly, and the assembly stability is ensured.

[0048] When the elastic compensation mechanism is in contact with the first connecting part on the dynamic ring 300, the elastic compensation mechanism can transmit force to the dynamic ring 300 by means of the first connecting part, the acting force is prevented from directly acting on the dynamic ring 300, the dynamic ring 300 is prevented from being damaged, and the sealing is prevented from being affected even if frequent start and stop occur.

[0049] When the elastic compensation mechanism is in contact with the first connecting part on the dynamic ring 300, the elastic compensation mechanism can push the dynamic ring 300 to slide along the axial direction of the rotating shaft 20 so that the dynamic ring 300 is tightly sealed with the static ring 200, by means of the elastic compensation effect of the elastic compensation mechanism, the dynamic ring 300 and the static ring 200 can be stably tightly sealed, the sealing gap between the dynamic ring 300 and the static ring 200 is prevented from being changed, and the stability of the sealing effect is ensured. The tight sealing refers to that the dynamic ring 300 and the static ring 200 are always tightly sealed with each other to prevent leakage, and the sealing surfaces between the dynamic ring 300 and the static ring 200 can relatively rotate.

[0050] And, the elastic compensation mechanism can provide a larger elastic adjustment amount for the dynamic ring 300, by means of the elastic compensation effect, the impact on the dynamic ring 300 during use is reduced, the dynamic ring 300 is prevented from being damaged or stuck, and the service life of the mechanical sealing structure is improved.

[0051] In particular, when the mechanical sealing structure is in a high-pressure working condition, the mechanical sealing structure has better sealing reliability and service life.

[0052] In the embodiment of the utility model, the static ring 200 is abutted on the gland 10, the first sealing piece 210 is arranged between the static ring 200 and the gland 10, and the first sealing piece 210 can prevent medium from leaking from the connecting part between the static ring 200 and the gland 10.

[0053] The designer can determine the specific structure of the first sealing piece 210 according to the use requirement, which is not specifically limited here. Preferably, the first sealing piece 210 comprises a first sealing ring.

[0054] Specifically, the gland 10 is provided with a first sealing groove for accommodating the first sealing ring, the first sealing ring is arranged in the first sealing groove, and the back end surface of the static ring 200 is tightly combined with the gland 10.

[0055] The force on the static ring 200 can be directly conducted to the gland 10, so that a large extrusion effect is not generated on the first sealing element 210, and the use stability of the first sealing element 210 is ensured.

[0056] In the embodiment of the utility model, the specific structure of the second sealing element 310 can be determined by the designer according to the use requirement, which is not specifically limited here. Preferably, the second sealing element 310 comprises a second sealing ring.

[0057] Specifically, the dynamic ring 300 is provided with a second sealing groove for accommodating the second sealing ring at one end close to the elastic element 420, and the second sealing ring is arranged in the second sealing groove. The gap between the dynamic ring 300 and the shaft sleeve 100 can be sealed by the second sealing element 310, and the sealing effect between the dynamic ring 300 and the shaft sleeve 100 is ensured.

[0058] In the embodiment of the utility model, the elastic compensation mechanism comprises a mounting seat 400, an elastic element 420 arranged between the mounting seat 400 and the dynamic ring 300, and a second connecting part arranged on the mounting seat 400, and the first connecting part can slide along the axial direction of the second connecting part and be circumferentially limited by the second connecting part.

[0059] Specifically, the mounting seat 400 is fixed on the shaft sleeve 100, so that the mounting seat 400 can support the second connecting part and be used for accommodating the elastic element 420, and the mounting stability of the elastic element 420 and the second connecting part is ensured. The axial direction of the second connecting part is parallel to the axial direction of the rotating shaft 20.

[0060] By cooperating the second connecting part with the first connecting part, the first connecting part can slide along the axial direction of the second connecting part, so that the dynamic ring 300 is provided with an adjustment free amount in the axial direction, and the adjustment effect of the dynamic ring 300 is ensured. Moreover, the second connecting part and the first connecting part are circumferentially limited, and the torque can be transmitted from the second connecting part to the first connecting part, so that the dynamic ring 300 can be driven to rotate.

[0061] Moreover, the displacement of the dynamic ring 300 due to wear or pressure change can be automatically compensated by the elastic element 420, so that the dynamic ring 300 is always attached to the static ring 200, and the sealing stability is ensured.

[0062] In the embodiment of the utility model, the circumferential limitation is circumferential limitation in the clockwise direction and / or circumferential limitation in the counterclockwise direction, which is not specifically limited here.

[0063] In a feasible embodiment, the circumferential limitation is circumferential limitation in the clockwise direction.

[0064] In another feasible embodiment, the circumferential limitation is circumferential limitation in the counterclockwise direction.

[0065] In still another possible embodiment, the circumferential limitation is a circumferential limitation in two directions, i.e. the first connecting part and the second connecting part only have a degree of freedom in the axial direction.

[0066] In the embodiment of the utility model, the first connecting part and the second connecting part are provided with a sliding groove adjusting mechanism, the sliding groove adjusting mechanism comprises a sliding part arranged on the first connecting part and a sliding groove structure 500 arranged on the second connecting part, the sliding part can be connected to the sliding groove structure 500, and the sliding groove structure 500 can provide the sliding part with a degree of freedom in the axial direction and limit the sliding part in the circumferential direction.

[0067] Specifically, the sliding groove structure 500 comprises a first sliding groove 510 arranged on the second connecting part in the axial direction of the rotating shaft 20, a second sliding groove 520 arranged in the circumferential direction of the rotating shaft 20 and a third sliding groove 530 arranged in the axial direction of the rotating shaft 20, both ends of the second sliding groove 520 are connected to the first sliding groove 510 and the third sliding groove 530 respectively, both ends of the third sliding groove 530 are arranged on both sides of the second sliding groove 520 respectively, and one end of the first sliding groove 510 penetrates the second connecting part to form an opening for the sliding part to enter.

[0068] The sliding part can enter the first sliding groove 510 through the opening, and then enter the third sliding groove 530 through the second sliding groove 520, so that the third sliding groove 530 provides the sliding part with an adjusting free amount in the axial direction.

[0069] Moreover, by arranging both ends of the third sliding groove 530 on both sides of the second sliding groove 520 respectively, the problem that the sliding part moves to the end of the third sliding groove 530 and slides out is avoided, thereby limiting the movement and enabling the first connecting part and the second connecting part to be matched more stably.

[0070] The designer can adjust the specific shape and structure of the first connecting part and the second connecting part according to the use requirement, which is not limited specifically herein.

[0071] Preferably, the first connecting part comprises a reinforcing ring 320 sleeved on the movable ring 300, and the sliding part is arranged on the reinforcing ring 320; the second connecting part comprises a mounting ring 410 arranged in an integral mode with the mounting seat 400, the mounting ring 410 is arranged outside the reinforcing ring 320, and the sliding groove structure 500 is arranged on the mounting ring 410.

[0072] Specifically, the mounting ring 410 is sleeved outside the reinforcing ring 320, and the sliding part protrudes outward from the reinforcing ring 320, so that the sliding part can enter the sliding groove structure 500 through the opening. When disassembling, the sliding part is controlled to exit the sliding groove structure 500 through the opening, and then the movable ring 300 can be disassembled.

[0073] In the embodiment of the utility model, chute structure 500 is provided with multiple, multiple chute structure 500 is along the circumferential interval ring of rotation axis 20, and the sliding part is correspondingly arranged with chute structure 500.

[0074] By setting multiple chute structure 500 and correspondingly setting multiple sliding parts, the connection strength is improved by multiple chute structure 500 and sliding part cooperation and coordination, so that the mounting ring 410 can better transmit torque to the reinforcing ring 320.

[0075] The designer can adjust the specific setting number and arrangement mode of chute structure 500 and sliding part according to the use requirement, which is not limited here.

[0076] For example, chute structure 500 and sliding part are both provided with two, two chute structure 500 is symmetrically arranged relative to the axis of rotation axis 20, and two sliding parts are arranged in the corresponding chute structure 500.

[0077] In the embodiment of the utility model, the sliding part includes the pin 330 connected with the reinforcing ring 320, and at least part of the pin 330 protrudes from the reinforcing ring 320 and is slidably arranged in the chute structure 500.

[0078] The pin 330 can be threadedly connected on the reinforcing ring 320, which helps to reduce the installation difficulty and improve the assembly efficiency. Moreover, when the pin 330 is damaged, the pin 330 can also be quickly disassembled, which improves the maintenance efficiency.

[0079] Wherein, when the static ring 200 is not installed, the pin 330 on the reinforcing ring 320 is pushed to the other end of the third chute 530 by the elastic action of the elastic compensation mechanism, so that the dynamic ring 300 is clamped, so that the dynamic ring 300 will not be out. And the pin 330 can move freely in the third chute 530, which will not affect the axial movement of the dynamic ring 300, so as to avoid the problem that the dynamic ring 300 is stuck.

[0080] Of course, in other feasible embodiments, the designer can adjust the specific structure of the sliding part according to the use requirement, which is not limited here. For example, the sliding part is integrally arranged with the reinforcing ring 320.

[0081] In the embodiment of the utility model, the mechanical seal structure further includes a push ring 430, which is movably arranged in the mounting ring 410 and placed between the elastic member 420 and the dynamic ring 300.

[0082] By setting the push ring 430 between the elastic member 420 and the movable ring 300, the elastic member 420 abuts on the push ring 430 and drives the movable ring 300 by means of the push ring 430, the push ring 430 can be attached to the movable ring 300, thereby improving the uniformity of force transmission, so that the movable ring 300 can slide more stably, and the force transmission effect is improved.

[0083] In the embodiment of the utility model, the designer can adjust the specific structure of the elastic member 420 according to the use requirement, which is not specifically limited here. For example, the elastic member 420 comprises at least one spring arranged between the mounting seat 400 and the movable ring 300, and the mounting seat 400 is provided with at least one clamping groove accommodating the spring.

[0084] Preferably, the spring is provided with a plurality of clamping grooves. The plurality of clamping grooves are arranged equidistantly along the axis of the rotating shaft 20, and each spring is respectively inserted into the corresponding clamping groove. By utilizing a plurality of springs, the strength and uniformity of the elastic force are improved, so that the movable ring 300 can be more stably pushed to abut on the static ring 200.

[0085] Of course, in other feasible embodiments, the elastic member 420 can also be provided as other structures with elastic effect, such as elastic blocks or disc springs, etc., which are not specifically limited here.

[0086] In the embodiment of the utility model, the mechanical seal mechanism further comprises a fastening screw 440, and the mounting seat 400 is fixed to the shaft sleeve 100 by means of the fastening screw 440.

[0087] The mounting seat 400 can be fixed on the shaft sleeve 100 by means of the fastening screw 440, thereby improving the structural stability of the mounting seat 400, so that the mounting seat 400 can better support the second connecting part.

[0088] In the embodiment of the utility model, the static ring 200 is provided with a first sealing end face, and the movable ring 300 is provided with a second sealing end face, and the first sealing end face and the second sealing end face can be attached and sealed. Preferably, the first sealing end face is parallel to the back end face of the static ring 200, thereby helping to better transmit the force to the gland 10.

[0089] By adopting the surface contact matching mode, the first sealing end face and the second sealing end face can maintain a high degree of close contact under high pressure environment, thereby effectively preventing the leakage of the medium and ensuring the reliability of the seal.

[0090] In the embodiment of the utility model, the mechanical seal structure further comprises a positioning structure arranged between the shaft sleeve 100 and the gland 10. The positioning structure can realize the positioning and installation between the shaft sleeve 100 and the gland 10.

[0091] Specifically, the positioning structure comprises a positioning piece detachably arranged on the gland 10 and a positioning groove arranged on the shaft sleeve 100, the positioning piece is capable of being inserted into the positioning groove for positioning the shaft sleeve 100 and the gland 10.

[0092] The designer can adjust the specific structure of the positioning piece according to the use requirement, which is not specifically limited here. For example, the positioning piece comprises a positioning sheet arranged on the outer side of the gland 10, and the positioning sheet is detachably connected with the gland 10 through a connecting bolt.

[0093] In a specific embodiment of the utility model, during installation, the mounting seat 400 is sleeved on the shaft sleeve 100, the fastening screw 440 is tightened, the spring is put into the clamping groove of the mounting seat 400 and the push ring 430, the movable ring 300 and the second sealing ring with the reinforcing ring 320 embedded are pressed into the first sliding groove 510 until the pin 330 reaches the end of the first sliding groove 510, the movable ring 300 is rotated by a certain angle, the pin 330 enters the third sliding groove 530 through the second sliding groove 520, and then the movable ring 300 is loosened. Under the elastic force of the spring, the pin 330 is pushed into one end of the third sliding groove 530, so that the movable ring 300 is clamped in the mounting seat 400.

[0094] Then, the static ring 200 is installed on the gland 10, the floating throttling bushing 700 is installed on the gland 10, the gland 10 is sleeved on the shaft sleeve 100, the movable ring 300 and the static ring 200 are abutted and sealed, the gland 10 is pressed downward, the movable ring 300 slides along the axial direction of the rotating shaft 20, so that the pin 330 can move in the third sliding groove 530, and the gland 10 is inserted into the positioning groove of the shaft sleeve 100 through the positioning sheet, so that the positioning and installation are realized, and finally the locking disc 110 is sleeved on the shaft sleeve 100.

[0095] Embodiment two

[0096] Please refer to Figure 1 As shown in the figure, the utility model provides a kind of pump equipment in the embodiment of the utility model, the pump equipment includes pump cover 30, gland 10, rotating shaft 20 and the mechanical seal structure described in embodiment one, pump cover 30 is connected with gland 10, and accommodating cavity for accommodating mechanical seal structure is formed between pump cover 30 and gland 10. The structure and effect of the mechanical seal structure are the same as described in embodiment one, which is not repeated here.

[0097] In the embodiment of the utility model, the end of the shaft sleeve 100 is provided with the locking disc 110, the shaft sleeve 100 is fixed to the rotating shaft 20 through the locking disc 110, and the third sealing member 120 is arranged between the shaft sleeve 100 and the rotating shaft 20. By arranging the locking disc 110 at the end of the shaft sleeve 100, the shaft sleeve 100 can be fixed to the rotating shaft 20 by using the locking disc 110, thereby improving the structural stability of the shaft sleeve 100.

[0098] The designer can adjust the specific structure of the third sealing member 120 according to the use requirement, which is not specifically limited here. Preferably, the third sealing member 120 is a third sealing ring.

[0099] Specifically, the shaft sleeve 100 is provided with a third sealing groove for accommodating the third sealing ring, and the third sealing ring is arranged in the third sealing groove. The gap between the shaft sleeve 100 and the rotating shaft 20 can be sealed by the third sealing ring, thereby ensuring the sealing effect between the shaft sleeve 100 and the rotating shaft 20.

[0100] In the embodiment of the utility model, the fourth sealing member 600 is arranged between the gland 10 and the pump cover 30, and the throttle bushing 700 is arranged between the gland 10 and the shaft sleeve 100.

[0101] By arranging the throttle bushing 700 between the gland 10 and the shaft sleeve 100, the gap between the gland 10 and the shaft sleeve 100 is reduced due to the presence of the throttle bushing 700. Once the seal leaks, the high-pressure medium will not directly spray out of the gap between the two, thereby avoiding damage to the environment, personnel and equipment.

[0102] The designer can adjust the specific structure of the fourth sealing member 600 according to the use requirement, which is not specifically limited here. Preferably, the fourth sealing member 600 is a fourth sealing ring.

[0103] Specifically, the gland 10 is provided with a fourth sealing groove for accommodating the fourth sealing ring, and the fourth sealing ring is arranged in the fourth sealing groove. The gap between the gland 10 and the pump cover 30 can be sealed by the fourth sealing ring, thereby ensuring the sealing effect between the gland 10 and the pump cover 30.

[0104] When the mechanical seal structure is installed on the pump equipment, the mechanical seal structure is sleeved on the rotating shaft 20, the gland 10 is attached to the surface of the pump cover 30, and the gland 10 is fixed to the pump cover 30 by using the stud and the nut, the bolt on the locking disc 110 is tightened, the shaft sleeve 100 is locked to the rotating shaft 20, and then the positioning sheet is removed from the positioning groove of the shaft sleeve 100.

[0105] When the pump equipment is running, the rotating shaft 20 drives the shaft sleeve 100 to rotate through the locking disc 110, the shaft sleeve 100 drives the mounting seat 400 to rotate, the mounting seat 400 drives the pin 330 inside it to rotate through the sliding groove structure 500, thereby driving the dynamic ring 300 to rotate, and the sealing surface between the dynamic ring 300 and the static ring 200 rotates relatively. The pin 330 can move along the axial direction of the rotating shaft 20 in the third sliding groove 530, and the spring force is used to make the dynamic ring 300 always adhere to the static ring 200, thereby ensuring the sealing reliability.

[0106] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0107] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A mechanical seal structure for being provided between a gland and a rotary shaft, characterized by, The mechanical seal structure comprises: a shaft sleeve arranged on the rotating shaft; a static ring assembly comprising a static ring arranged on the gland and a first sealing element arranged between the static ring and the gland; a dynamic ring assembly comprising a dynamic ring sleeved on the shaft sleeve, a second sealing element arranged between the dynamic ring and the shaft sleeve, and a first connecting portion arranged on the dynamic ring; a resilient compensation mechanism arranged between the shaft sleeve and the dynamic ring, the resilient compensation mechanism being detachably connected with the first connecting portion, and the resilient compensation mechanism being used to push the dynamic ring to slide along the axial direction of the rotating shaft so as to make the dynamic ring and the static ring tightly seal.

2. The mechanical seal structure as set forth in claim 1, wherein The resilient compensation mechanism comprises a mounting seat, a resilient element arranged between the mounting seat and the dynamic ring, and a second connecting portion arranged on the mounting seat, and the first connecting portion is capable of sliding along the axial direction of the second connecting portion and is limited in the circumferential direction by the second connecting portion.

3. The mechanical seal structure as set forth in claim 2, wherein A sliding groove adjusting mechanism is arranged between the first connecting portion and the second connecting portion, the sliding groove adjusting mechanism comprising a sliding portion arranged on the first connecting portion and a sliding groove structure arranged on the second connecting portion, the sliding portion being capable of being clamped to the sliding groove structure, and the sliding groove structure being capable of providing the sliding portion with axial freedom and limiting the sliding portion in the circumferential direction.

4. The mechanical seal structure as set forth in claim 3, wherein The sliding groove structure comprises a first sliding groove arranged on the second connecting portion along the axial direction of the rotating shaft, a second sliding groove arranged along the circumferential direction of the rotating shaft, and a third sliding groove arranged along the axial direction of the rotating shaft, two ends of the second sliding groove being respectively connected with the first sliding groove and the third sliding groove, two ends of the third sliding groove being respectively arranged on two sides of the second sliding groove, and one end of the first sliding groove penetrating through the second connecting portion to form an opening for the sliding portion to enter.

5. The mechanical seal structure as set forth in claim 3, wherein A plurality of sliding groove structures are arranged, and the sliding groove structures are arranged in a ring shape along the circumferential direction of the rotating shaft, and the sliding portion is arranged corresponding to the sliding groove structure.

6. The mechanical seal structure as set forth in claim 4, wherein The first connecting portion comprises a reinforcing ring sleeved on the dynamic ring, and the sliding portion is arranged on the reinforcing ring; the second connecting portion comprises a mounting ring arranged in an integral manner with the mounting seat, the mounting ring being arranged outside the reinforcing ring, and the sliding groove structure being arranged on the mounting ring.

7. The mechanical seal structure as set forth in claim 6, wherein The sliding portion comprises a pin connected with the reinforcing ring, at least part of the pin protruding from the reinforcing ring and being slidably arranged in the sliding groove structure; and / or the mechanical seal structure further comprises a pushing ring movably arranged in the mounting ring and arranged between the resilient element and the dynamic ring.

8. The mechanical seal structure as set forth in claim 2, wherein The resilient element comprises at least one spring arranged between the mounting seat and the dynamic ring, and the mounting seat is provided with at least one clamping groove accommodating each spring; and / or the mechanical seal structure further comprises a fastening screw, and the mounting seat is fixed to the shaft sleeve through the fastening screw.

9. A pump apparatus, characterized by The pump cover is connected with the gland cover, and a containing cavity for containing the mechanical seal structure is formed between the pump cover and the gland cover.

10. The pump apparatus of claim 9, wherein, The end of the shaft sleeve is provided with a locking disc, the shaft sleeve is fixed to the rotating shaft through the locking disc, and a third seal is arranged between the shaft sleeve and the rotating shaft; and / or a fourth seal is arranged between the gland cover and the pump cover, and a throttling bushing is arranged between the gland cover and the shaft sleeve.

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