Anti-vibration mechanical sealing element

Abstract

The utility model provides an anti-vibration type mechanical sealing element, which belongs to the technical field of mechanical parts and further comprises a positioning ring fixed on the outer side of a shaft sleeve, a gland sleeved on the outer side of the shaft sleeve, a movable structure arranged on one side of the positioning ring, a spring connected with one side of the movable structure, and a static ring arranged inside the gland, a second sealing ring is fixed between the static ring and the gland, and the lubricating structure is inserted into the top end of the shaft sleeve. According to the utility model, the screw rod is rotated to push the movable ring to extrude the spring, the pressure of the spring on the sealing movable ring is increased, and the locking nut is rotated to lock and fix the position between the screw rod and the fixed screw sleeve, so that the tightness adjusting function of the device is realized, and the tightness of the spring is conveniently adjusted after long-time use; the radial pressure between the moving ring and the static ring is guaranteed, the sealing effect of the device is guaranteed, and the functionality of the device is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical accessories, in particular to a vibration-resistant mechanical seal. Background Art

[0002] Traditional mechanical seals often experience problems such as reduced sealing performance and leakage when exposed to vibration, which not only affects the normal operation of the equipment, but also may pollute the environment and even cause safety accidents. In order to solve this problem, vibration-resistant mechanical seals came into being, which can effectively prevent fluid or gas leakage and improve the stability and operating efficiency of the equipment.

[0003] After searching, the Chinese patent application number 202122898713.2 discloses a vibration-resistant mechanical seal, including a main body, the interior of the main body is connected to a mechanical shaft, the top and bottom of one side of the main body are respectively penetrated by threaded columns, one end of the two threaded columns extend to the interior of the main body, the surfaces of the two threaded columns are provided with connecting sleeves, one end of the two connecting sleeves are fixedly connected to a moving plate, and one end of the two moving plates are respectively slidably connected to sliding blocks. In the vibration-resistant mechanical seal described in the utility model, when the main body vibrates, the sliding block moves on the moving plate through the expansion and contraction of the auxiliary spring, and the fixed column can be driven to slide on the mechanical shaft through the expansion and contraction of the expansion spring. The main body can be buffered by the use of the expansion spring, and the main body can be buffered for the second time by the use of the buffer device to prevent abnormal wear of the main body during vibration and cause medium leakage;

[0004] The above patent still has the following shortcomings: the spring is easy to loosen. With the long-term use of the equipment, the spring material may age and fatigue, resulting in its performance degradation and reduced tightening force, which in turn causes loosening, reducing the radial pressure between the dynamic ring and the static ring and failing to achieve the expected sealing effect, thereby causing leakage and affecting the service life of the device.

[0005] Therefore, there is an urgent need for a vibration-resistant mechanical seal to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to address the problem that the existing springs are easy to loosen. With the long-term use of the equipment, the spring material may age and fatigue, resulting in a decline in its performance and a reduction in the fastening force, which in turn causes loosening, reduces the radial pressure between the dynamic ring and the static ring, and fails to achieve the expected sealing effect, thus causing leakage and affecting the service life of the device.

[0007] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0008] A vibration-resistant mechanical seal comprises a shaft sleeve and further comprises:

[0009] A positioning ring is fixed on the outer side of the shaft sleeve, and a moving structure is provided on one side of the positioning ring, and a spring is connected to one side of the moving structure;

[0010] A push ring is installed on one side of the spring, and one side of the push ring is connected to a sealing dynamic ring, and a first sealing ring is installed at a middle position between the push ring and the sealing dynamic ring;

[0011] A gland is sleeved on the outer side of the shaft sleeve, and a static ring is installed inside the gland, and a second sealing ring is fixed between the static ring and the gland;

[0012] The lubrication structure is inserted inside the top end of the sleeve.

[0013] As a preferred technical solution of the present application, the movable structure includes a movable ring sliding on the outside of the sleeve and connected to the push ring, a screw sleeved inside the fixed nut and connected to the rotating seat, a locking nut threadedly connected to the outside of the locking nut, a fixed nut fixed on the outside of the positioning ring, and a rotating seat installed on one side of the movable ring.

[0014] As a preferred technical solution of the present application, the lubrication structure includes a rubber bag installed on the top of the connecting seat, a connecting seat installed on the top of the catheter, an oil filling hole fixed inside the top of the pressure cover, a rubber membrane fixed inside the oil filling hole, and a catheter inserted inside the rubber membrane.

[0015] As a preferred technical solution of the present application, a sliding structure is formed between the push ring and the shaft sleeve, and a rotating structure is formed between the sealing dynamic ring and the static ring.

[0016] As a preferred technical solution of the present application, an external thread is arranged on the outer wall of the screw rod, and an internal thread cooperating with the external thread is arranged inside the fixing screw sleeve.

[0017] As a preferred technical solution of the present application, the front cross-section of the rubber membrane is a funnel-shaped inclined structure, and a hole smaller than the diameter of the catheter is opened at the bottom of the rubber membrane.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In the scheme of this application:

[0020] The screw is rotated to push the moving ring to squeeze the spring, increasing the pressure of the spring on the sealing dynamic ring, and the locking nut is rotated to lock the position between the screw and the fixed screw sleeve, thereby realizing the tightness adjustment function of the device, which is convenient for adjusting the tightness of the spring after long-term use, ensuring the radial pressure between the dynamic ring and the static ring, ensuring the sealing effect of the device, and enhancing the functionality of the device;

[0021] The lubricating oil can be easily injected into the interior of the gland through the oil filling hole, and the rubber bag is pressed to allow the catheter to extract the contaminated lubricating oil inside the gland, thereby realizing the easy maintenance function of the device, making it easy to inject the lubricating oil into the interior of the device, and also to suck out the lubricating oil inside the device, so that the staff can maintain the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure provided for this application;

[0023] Figure 2 A schematic diagram of a three-dimensional cross-sectional structure provided for this application;

[0024] Figure 3 A schematic diagram of a three-dimensional cross-sectional structure of a mobile structure provided for this application;

[0025] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the lubrication structure provided in this application.

[0026] Indications in the figure: 1. sleeve; 2. gland; 3. push ring; 4. spring; 5. moving structure; 501. moving ring; 502. screw; 503. locking nut; 504. fixing screw sleeve; 505. rotating seat; 6. positioning ring; 7. lubrication structure; 701. rubber bag; 702. connecting seat; 703. oil filling hole; 704. rubber membrane; 705. guide tube; 8. first sealing ring; 9. sealing dynamic ring; 10. second sealing ring; 11. static ring. DETAILED DESCRIPTION

[0027] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0028] like Figure 1-4 As shown, a vibration-resistant mechanical seal proposed in this embodiment includes a shaft sleeve 1, and also includes:

[0029] A positioning ring 6 is fixed on the outer side of the shaft sleeve 1, and a moving structure 5 is provided on one side of the positioning ring 6, and a spring 4 is connected to one side of the moving structure 5;

[0030] A push ring 3 is installed on one side of the spring 4, and a sealing dynamic ring 9 is connected to one side of the push ring 3, and a first sealing ring 8 is installed in the middle position between the push ring 3 and the sealing dynamic ring 9;

[0031] A gland 2 is sleeved on the outer side of the shaft sleeve 1, and a stationary ring 11 is installed inside the gland 2, and a second sealing ring 10 is fixed between the stationary ring 11 and the gland 2;

[0032] The lubricating structure 7 is inserted inside the top end of the sleeve 1 .

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, as a preferred embodiment, on the basis of the above method, further, the moving structure 5 includes a moving ring 501 sliding on the outside of the sleeve 1 and connected to the push ring 3, a screw 502 sleeved inside the fixed screw sleeve 504 and connected to the rotating seat 505, a locking nut 503 threadedly connected to the outside of the locking nut 503, a fixed screw sleeve 504 fixed on the outside of the positioning ring 6 and a rotating seat 505 installed on one side of the moving ring 501, an outer wall of the screw 502 is provided with an external thread, and the fixed screw sleeve The interior of 504 is provided with an internal thread that cooperates with the external thread. By rotating the three sets of screws 502 at the same time, the screws 502 push the movable ring 501 to move to the right, so that the movable ring 501 squeezes the spring 4, increasing the pressure of the spring 4 on the sealing dynamic ring 9, and rotating the locking nuts 503 so that the two sets of locking nuts 503 are tightly attached to the two sides of the fixed screw sleeve 504, locking and fixing the position between the screw 502 and the fixed screw sleeve 504, and the screw 502 is rotated on one side of the movable ring 501 by rotating the seat 505.

[0034] like Figure 1 , Figure 2 and Figure 4 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the lubricating structure 7 includes a rubber bag 701 installed on the top of the connecting seat 702, a connecting seat 702 installed on the top of the conduit 705, an oil injection hole 703 fixed inside the top of the gland 2, a rubber membrane 704 fixed inside the oil injection hole 703, and a conduit 705 inserted inside the rubber membrane 704, the front view cross section of the rubber membrane 704 is a funnel-shaped inclined structure, and a hole smaller than the diameter of the conduit 705 is opened at the bottom of the rubber membrane 704, through which the rubber membrane 704 is provided. The lubricating oil can be directly injected into the interior of the gland 2 through the oil filling hole 703. At the same time, the funnel-shaped rubber membrane 704 prevents the lubricating oil from leaking outward from the oil filling hole 703. The rubber bag 701 is pressed to squeeze out the air inside the rubber bag 701. Then, the conduit 705 is inserted into the interior of the gland 2 through the rubber membrane 704, so that the rubber bag 701 can extract the contaminated lubricating oil inside the gland 2 through the conduit 705. The lubricating oil extracted by the rubber bag 701 can be injected into the interior of the gland 2 through the oil filling hole 703 to replace the lubricating oil inside the gland 2.

[0035] A sliding structure is formed between the push ring 3 and the shaft sleeve 1 , and a rotating structure is formed between the sealing dynamic ring 9 and the static ring 11 .

[0036] Specifically, when the vibration-resistant mechanical seal is in use: when the shaft sleeve 1 rotates, the sealing dynamic ring 9 rotates with the shaft sleeve 1, while the static ring 11 remains stationary, and a very thin liquid film is formed by the contact and friction between the sealing dynamic ring 9 and the static ring 11, thereby achieving the purpose of sealing, and the spring 4 pushes the sealing dynamic ring 9 to contact with the static ring 11 through the push ring 3 to provide radial pressure, and the gap between the static ring 11 and the pressure cover 2 is sealed by the second sealing ring 10, and at the same time, the second sealing ring 10 wraps the static ring 11 to reduce the vibration transmitted to the static ring 11 by the pressure cover 2.

[0037] Specifically, when the vibration-resistant mechanical seal is in use: by rotating the three sets of screws 502 at the same time, the screws 502 push the movable ring 501 to move to the right, so that the movable ring 501 squeezes the spring 4, increasing the pressure of the spring 4 on the sealing dynamic ring 9, and rotating the locking nuts 503 so that the two sets of locking nuts 503 are tightly attached to both sides of the fixed screw sleeve 504, the position between the screw 502 and the fixed screw sleeve 504 is locked and fixed, and the screw 502 is rotated on one side of the movable ring 501 by rotating the seat 505.

[0038] Specifically, when the vibration-resistant mechanical seal is in use: the lubricating oil is conveniently injected directly into the interior of the gland 2 through the oil filling hole 703, and at the same time, the funnel-shaped rubber membrane 704 prevents the lubricating oil from leaking outward from the oil filling hole 703, and the rubber bag 701 is pressed to squeeze out the air inside the rubber bag 701, and then the conduit 705 is inserted into the interior of the gland 2 through the rubber membrane 704, so that the rubber bag 701 extracts the contaminated lubricating oil inside the gland 2 through the conduit 705, and the lubricating oil extracted by the rubber bag 701 can be injected into the interior of the gland 2 through the oil filling hole 703, so as to replace the lubricating oil inside the gland 2.

[0039] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A vibration-resistant mechanical seal, comprising a sleeve (1), characterized in that: Also includes, A positioning ring (6) is fixed on the outside of the shaft sleeve (1), and a moving structure (5) is provided on one side of the positioning ring (6), and a spring (4) is connected to one side of the moving structure (5); A push ring (3) is installed on one side of the spring (4), and one side of the push ring (3) is connected to a sealing dynamic ring (9), and a first sealing ring (8) is installed at a middle position between the push ring (3) and the sealing dynamic ring (9); A gland (2) is sleeved on the outside of the shaft sleeve (1), and a stationary ring (11) is installed inside the gland (2), and a second sealing ring (10) is fixed between the stationary ring (11) and the gland (2); The lubrication structure (7) is inserted into the interior of the top end of the shaft sleeve (1).

2. A vibration-resistant mechanical seal according to claim 1, characterized in that: The movable structure (5) comprises a movable ring (501) sliding on the outside of the shaft sleeve (1) and connected to the push ring (3), a screw rod (502) sleeved inside the fixed screw sleeve (504) and connected to the rotating seat (505), a locking nut (503) threadedly connected to the outside of the locking nut (503), a fixed screw sleeve (504) fixed to the outside of the positioning ring (6), and a rotating seat (505) mounted on one side of the movable ring (501).

3. The vibration-resistant mechanical seal according to claim 1, characterized in that: The lubrication structure (7) comprises a rubber bag (701) mounted on the top of a connection seat (702), a connection seat (702) mounted on the top of a guide tube (705), an oil injection hole (703) fixed inside the top of a gland (2), a rubber membrane (704) fixed inside the oil injection hole (703), and a guide tube (705) inserted inside the rubber membrane (704).

4. The vibration-resistant mechanical seal according to claim 1, characterized in that: A sliding structure is formed between the push ring (3) and the shaft sleeve (1), and a rotating structure is formed between the sealing dynamic ring (9) and the static ring (11).

5. The vibration-resistant mechanical seal according to claim 2, characterized in that: An external thread is provided on the outer wall of the screw rod (502), and an internal thread that cooperates with the external thread is provided inside the fixing screw sleeve (504).

6. The vibration-resistant mechanical seal according to claim 3, characterized in that: The front cross-section of the rubber membrane (704) is a funnel-shaped inclined structure, and a hole smaller than the diameter of the catheter (705) is provided at the bottom of the rubber membrane (704).

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