Container type mechanical seal with circumferential tight fit structure

Abstract

The utility model provides a packaging type mechanical seal with a circumferential close-fitting structure, which comprises a support assembling component, a bearing and adapting component, a transfer loading and supporting component, a close-fitting positioning component, a fixed sealing component and a movable sealing component, the packaging type mechanical seal carries out omnibearing sealing on a sealing surface through a multi-layer sealing structure, leakage is effectively prevented, and the sealing performance is improved. The sealing performance of equipment can be improved, the transmission mandrel can stably rotate through the combination of the bearing and adapting assembly and the transferring and carrying assembly, the transmission mandrel is accurately positioned through the tight fit positioning assembly, shaking and deviation in the rotating process are avoided, the operation stability of the equipment can be improved, the fixed sealing assembly is provided with an axial jacking structure, and the sealing performance of the equipment is improved. The position of the fixing seat ring can be adjusted in the axial direction in the assembling end ring so as to meet the sealing requirements under different working conditions, the flexibility and adaptability of mechanical sealing are improved, good sealing performance and abrasion resistance can be kept in the long-time operation process, and then the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to a seal, in particular to a cartridge mechanical seal with a circumferential tight - fitting structure. Background Art

[0002] Patent document CN210715950U discloses a mechanical seal assembly, which includes a stationary ring and a spring seat. A screw is arranged inside the middle of the stationary ring, and an upper sealing ring is arranged around the upper end of the stationary ring. At the same time, a moving ring is fixed at the lower end of the stationary ring, a lower sealing ring is arranged inside the lower end of the moving ring, and a push ring is fixed at the lower end of the moving ring. The upper end of the spring seat is connected with the push ring through a reserved groove, and the outer end of the push ring is connected with the spring seat through a guide wheel. A spring sleeve is fixed at the lower end of the push ring, and the outer end of the spring sleeve is connected with the spring seat through a fixing groove. At the same time, the lower end inside the fixing groove is connected with the spring sleeve through a chute and a slider. A placing groove is arranged inside the lower end of the spring sleeve, and a support spring is arranged inside the placing groove, which is convenient for increasing the axially displaceable amount of the seal assembly and at the same time avoiding the distortion of the support spring in the gap. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cartridge mechanical seal with a circumferential tight - fitting structure to improve its sealing performance.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A cartridge mechanical seal with a circumferential tight - fitting structure, which includes:

[0006] A support and assembly component, which is installed in a frame through a connecting piece and has an assembly space inside;

[0007] A bearing and mating component, which is installed in the support and assembly component and can rotate in the support and assembly component, and has a mating space inside;

[0008] A transfer and carrier component, which is installed in the bearing and mating component and can rotate in the support and assembly component through the bearing and mating component. It has a core shaft carrier space inside. The transfer and carrier component carriers a drive core shaft and rotates with the drive core shaft;

[0009] A tight - fitting and positioning component, which is installed in the transfer and carrier component and cooperates with the drive core shaft. The tight - fitting and positioning component positions the position of the drive core shaft in the transfer and carrier component;

[0010] A fixed seal component, which is installed in the support and assembly component through an axial pressing structure and can adjust its installation position axially in the support and assembly component;

[0011] The movable sealing assembly is installed on the adapter carrier assembly and cooperates with the fixed sealing assembly. It can rotate together with the adapter carrier assembly and maintain a sealed state between the movable sealing assembly and the fixed sealing assembly.

[0012] Specifically, the support and assembly component includes:

[0013] The support end tube has a set of locking bolt holes formed at its edge. Each locking bolt hole axially penetrates both ends of the support end tube and is arranged sequentially in the circumferential direction. The support end tube can be fixed in the frame through the matching locking bolts.

[0014] The assembly end ring is formed at the inner end of the support end tube. It extends along the circumferential direction of the support end tube and protrudes axially backward from the support end tube. Its diameter is smaller than that of the support end tube and can extend into the shaft hole of the frame.

[0015] The positioning convex ring is formed on the inner wall of the support end tube. It extends along the circumferential direction of the support end tube and protrudes radially inward from the support end tube.

[0016] In an embodiment of the present utility model, a pair of shaft hole sealing rings are provided between the outer wall of the assembly end ring and the shaft hole of the frame, and the mating surface between the assembly end ring and the shaft hole is sealed by the shaft hole sealing rings.

[0017] The bearing and adapter component includes:

[0018] The mating bearing, the outer ring of which abuts against the inner wall of the support end tube, the inner ring of which engages with the adapter carrier assembly, and the positioning convex ring abuts against the inner end of the mating bearing.

[0019] The mating end cover, the outer edge part of which covers the outer end of the support end tube and is joined to the support end tube through locking bolts, and the inner edge part of which abuts against the outer end of the mating bearing. The mating bearing is axially positioned by the mating end cover and the positioning convex ring.

[0020] The adapter carrier assembly includes:

[0021] The carrier sleeve axially penetrates through the mating bearing. Its outer wall abuts against the inner wall of the mating bearing and can rotate through the mating bearing. Its inner end extends backward from the assembly end ring, and its outer end extends forward from the support end tube. The drive core shaft axially penetrates through the carrier sleeve.

[0022] The carrier flange is formed at the inner end of the carrier sleeve. It extends along the circumferential direction of the carrier sleeve and is folded towards the positioning convex ring.

[0023] In an embodiment of the present utility model, a pair of core shaft sealing rings are provided on the inner wall of the carrier sleeve, and the mating surface between the carrier sleeve and the drive core shaft is sealed by the core shaft sealing rings.

[0024] The tight fit positioning assembly includes:

[0025] A group of tight-fitting slots is provided, each of which is formed at the outer end of the support sleeve, penetrates both sides of the support sleeve in the radial direction, and extends along the axial direction of the support sleeve. Each of the tight-fitting slots is sequentially arranged along the circumference of the support sleeve, so that the outer end of the support sleeve can be contracted inward or expanded outward;

[0026] A tightening hoop, which is wrapped around the outer end of the carrier sleeve and corresponds to the position of the tightening slot, and has an adjusting fracture inside, so that it can shrink inward or expand outward together with the outer end of the carrier sleeve, and a guide arc surface is provided on the outer wall of the tightening hoop, which extends along the axial direction of the tightening hoop, and the middle part of which protrudes radially toward the outside of the tightening hoop;

[0027] A tight inner ring, which is sleeved on the outer wall of the tight hoop and located at the inner end of the tight hoop, and whose inner wall is provided with an inner end inclined surface adapted to the guide arc surface;

[0028] The tightening outer ring is sleeved on the outer wall of the tightening hoop and is located at the outer end of the tightening hoop. The inner wall of the tightening outer ring is provided with an outer end inclined surface adapted to the guide arc surface. The tightening outer ring and the tightening inner ring are locked by a tightening bolt rod extending axially. The tightening bolt rod drives the tightening outer ring and the tightening inner ring to move axially, and drives the tightening hoop to contract radially, so that the outer end of the supporting sleeve is clamped on the outer wall of the transmission core shaft, and the transmission core shaft rotates together with the supporting sleeve.

[0029] The fixed seal assembly includes:

[0030] A fixed seat ring, which is installed in the assembly end ring, and whose inner end cooperates with the positioning convex ring through an axial guide structure, and can be adjusted in the axial direction in the assembly end ring;

[0031] A fixed compression spring is provided in a group, each fixed compression spring is installed in a positioning convex ring, extends axially, and abuts against a fixed seat ring, and the fixed compression spring applies axial pressure to the fixed seat ring.

[0032] In one embodiment of the utility model, a fixed sealing ring is provided on the inner wall of the assembly end ring, and the fixed sealing ring seals the matching surface between the fixed seat ring and the assembly end ring.

[0033] The movable seal assembly includes:

[0034] The movable swivel is installed at the connection part between the support flange and the support sleeve through a circumferential positioning structure, and can rotate together with the support sleeve and the support flange. It is in contact with the fixed seat ring, and the fixed seat ring applies axial pressure to the movable swivel to form a sealing surface between the fixed seat ring and the movable swivel.

[0035] In an embodiment of the present utility model, a movable sealing ring is provided at the joint of the supporting flange and the supporting sleeve, and the movable sealing ring seals the mating surfaces between the movable rotating ring, the supporting flange and the supporting sleeve.

[0036] The advantages of the present utility model are as follows:

[0037] Through the cooperation of multiple sealing structures and components, including shaft hole sealing rings, mandrel sealing rings, fixed sealing rings, movable sealing rings, etc., the integral mechanical seal provides all-round sealing for the sealing surface, effectively preventing leakage, improving the sealing performance of the equipment. The combination of the bearing and connecting component and the adapter and supporting component enables the drive mandrel to rotate smoothly, and the drive mandrel is accurately positioned by the tight-fitting positioning component, avoiding shaking and offset during rotation, which is beneficial to improving the operation stability of the equipment. The fixed sealing component is provided with an axial pressing structure, enabling the fixed seat ring to be axially adjusted in the assembled end ring to adapt to the sealing requirements under different working conditions, improving the flexibility and adaptability of the mechanical seal, and maintaining good sealing performance and wear resistance during long-term operation, thereby extending the service life of the equipment. Description of the Drawings

[0038] Figure 1 is a schematic cross-sectional structure view of the integral mechanical seal with a circumferential tight-fitting structure proposed by the present utility model. Detailed Embodiments

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can generally be arranged and designed in a variety of different configurations. Therefore, the detailed description of the embodiments of the present utility model provided herein is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0040] Such as Figure 1As shown in the figure, the assembled mechanical seal with a circumferential fastening structure proposed by the present utility model includes a support assembly component, a bearing and connection component, a connection and support component, a fastening and positioning component, a fixed seal component, and a movable seal component. The support assembly component is installed in the frame through a connecting member and has an assembly space inside. The bearing and connection component is installed in the support assembly component and can rotate in the support assembly component, and has a connection space inside. The connection and support component is installed in the bearing and connection component and can rotate in the support assembly component through the bearing and connection component, and has a core shaft support space inside. The connection and support component supports the drive core shaft and rotates with the drive core shaft. The fastening and positioning component is installed in the connection and support component and cooperates with the drive core shaft to position the drive core shaft in the connection and support component. The fixed seal component is installed in the support assembly component through an axial pressing structure and can adjust its installation position axially in the support assembly component. The movable seal component is installed on the connection and support component and cooperates with the fixed seal component, and can rotate with the connection and support component to maintain a sealed state between the movable seal component and the fixed seal component.

[0041] In this embodiment, the support assembly component includes a support end tube 110, an assembly end ring 120, and a positioning convex ring 130. A set of locking bolt holes are formed at the edge of the support end tube. Each locking bolt hole penetrates through both ends of the support end tube axially and is arranged sequentially in the circumferential direction. The support end tube can be fixed in the frame through a locking bolt adapted thereto. The assembly end ring is formed at the inner end of the support end tube, extends along the circumferential direction of the support end tube, and protrudes backward along the axial direction of the support end tube. Its diameter is smaller than that of the support end tube and can extend into the shaft hole of the frame. The positioning convex ring is formed on the inner wall of the support end tube, extends along the circumferential direction of the support end tube, and protrudes inward along the radial direction of the support end tube.

[0042] In this embodiment, a pair of shaft hole sealing rings 121 are arranged between the outer wall of the assembly end ring and the shaft hole of the frame to seal the mating surface between the assembly end ring and the shaft hole.

[0043] The bearing and connection component includes a connection bearing 210 and a connection end cover 220. The outer ring of the connection bearing abuts against the inner wall of the support end tube, and its inner ring is joined to the connection and support component. The positioning convex ring abuts against the inner end of the connection bearing. The outer edge part of the connection end cover covers the outer end of the support end tube and is joined to the support end tube through a locking bolt. Its inner edge part abuts against the outer end of the connection bearing to axially position the connection bearing by the connection end cover and the positioning convex ring.

[0044] The transfer support assembly includes a support sleeve 310 and a support flange 320. The support sleeve passes through the matching bearing in the axial direction, and its outer wall abuts against the inner wall of the matching bearing. It can be rotated through the matching bearing, and its inner end extends to the rear of the assembly end ring, and its outer end extends to the front of the support end tube. The transmission core shaft passes through the support sleeve in the axial direction. The support flange is formed at the inner end of the support sleeve, which extends along the circumference of the support sleeve and is rolled toward the positioning convex ring.

[0045] In this embodiment, a pair of core shaft sealing rings 311 are provided on the inner wall of the support sleeve, and the core shaft sealing rings are used to seal the matching surface between the support sleeve and the transmission core shaft.

[0046] The tightening and positioning assembly includes a tightening slot 410, a tightening hoop 420, a tightening inner ring 430 and a tightening outer ring 440. A group of tightening slots are provided, each of which is formed at the outer end of the support sleeve, and penetrates both sides of the support sleeve in the radial direction and extends along the axial direction of the support sleeve. Each tightening slot is arranged in sequence along the circumference of the support sleeve, so that the outer end of the support sleeve can shrink inward or expand outward. The tightening hoop is wrapped around the outer end of the support sleeve and corresponds to the position of the tightening slot. An adjusting fracture is opened inside the tightening hoop so that it can shrink inward or expand outward with the outer end of the support sleeve. A guide arc surface is opened on the outer wall of the tightening hoop. The guide arc surface is arranged along the The tightening hoop ring extends axially, and its middle part protrudes radially toward the outside of the tightening hoop ring. The tightening inner ring is sleeved on the outer wall of the tightening hoop ring and is located at the inner end of the tightening hoop ring. Its inner wall is provided with an inner end inclined surface adapted to the guide arc surface. The tightening outer ring is sleeved on the outer wall of the tightening hoop ring and is located at the outer end of the tightening hoop ring. Its inner wall is provided with an outer end inclined surface adapted to the guide arc surface. The tightening outer ring and the tightening inner ring are locked by a tightening bolt rod extending axially, and the tightening outer ring and the tightening inner ring are driven by the tightening bolt rod to move axially, and the tightening hoop ring is driven to contract radially, so that the outer end of the supporting sleeve is clamped on the outer wall of the transmission core shaft, and the transmission core shaft rotates together with the supporting sleeve.

[0047] The fixed sealing assembly includes a fixed seat ring 510 and a fixed compression spring 520. The fixed seat ring is installed in the assembly end ring. The inner end of the fixed seat ring cooperates with the positioning convex ring through an axial guide structure, and the position can be adjusted axially in the assembly end ring. A group of fixed compression springs are provided, and each fixed compression spring is installed in the positioning convex ring respectively. It extends axially and abuts against the fixed seat ring, and the fixed compression spring applies axial pressure to the fixed seat ring.

[0048] In this embodiment, a fixed sealing ring 122 is provided on the inner wall of the assembly end ring, and the fixed sealing ring seals the matching surface between the fixed seat ring and the assembly end ring.

[0049] The movable seal assembly includes a movable swivel ring 600. The movable swivel ring is installed at the joint of the carrier flange and the carrier sleeve through a circumferential positioning structure and can rotate together with the carrier sleeve and the carrier flange. It abuts against the fixed seat ring, and an axial pressure is applied to the movable swivel ring by the fixed seat ring to form a sealing surface between the fixed seat ring and the movable swivel ring.

[0050] In this embodiment, a movable sealing ring 321 is provided at the joint of the carrier flange and the carrier sleeve to seal the mating surfaces between the movable swivel ring and the carrier flange and the carrier sleeve.

[0051] In the description of the present utility model, it should be noted that when terms indicating orientation or positional relationships such as "upper", "lower", "inner", "outer", "left", "right", etc. appear, they should be understood as based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the product of the present utility model is usually placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, when terms such as "first", "second", etc. appear, they are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A cartridge mechanical seal with a circumferentially tight structure, characterized in that: include: A support assembly component, which is installed in the frame through a connecting piece and has an assembly space inside; A transfer fitting assembly, which is installed in the supporting assembly assembly and can rotate in the supporting assembly assembly, and has a fitting space inside; The transfer support assembly is installed in the transfer and matching assembly, and can be rotated in the supporting assembly through the transfer and matching assembly. The interior of the transfer support assembly has a core shaft supporting space, and the transfer support assembly supports the transmission core shaft and rotates with the transmission core shaft; A tight fitting and positioning assembly, which is installed in the adapter carrier assembly and cooperates with the transmission mandrel, and the tight fitting and positioning assembly is used to position the transmission mandrel in the adapter carrier assembly; A fixed sealing assembly, which is installed in the supporting assembly assembly through an axial pressing structure, and the installation position can be adjusted axially in the supporting assembly assembly; The movable sealing component is installed on the transfer carrier component and cooperates with the fixed sealing component. It can rotate with the transfer carrier component to maintain a sealing state between the movable sealing component and the fixed sealing component.

2. A cartridge mechanical seal with a circumferentially tight structure according to claim 1, characterized in that: The support assembly components include: The support end tube has a group of locking bolt holes on its edge, each of which penetrates both ends of the support end tube in the axial direction and is arranged in sequence in the circumferential direction, and the support end tube can be fixed in the frame by locking bolts adapted thereto; An assembly end ring is formed at the inner end of the support end tube, extends along the circumference of the support end tube, and protrudes axially toward the rear of the support end tube. The diameter of the assembly end ring is smaller than the diameter of the support end tube, and can extend into the axial hole of the frame; A positioning convex ring is formed on the inner wall of the support end tube, extends along the circumference of the support end tube, and protrudes radially toward the inner side of the support end tube.

3. A cartridge mechanical seal with a circumferentially tight structure according to claim 2, characterized in that: The transfer adapter components include: A matching bearing, the outer ring of which abuts against the inner wall of the supporting end tube, the inner ring of which is engaged with the transfer support assembly, and the positioning convex ring abuts against the inner end of the matching bearing; The matching end cover has an outer edge portion that covers the outer end of the supporting end tube and is connected to the supporting end tube through a locking bolt, and an inner edge portion that abuts against the outer end of the matching bearing.

4. A cartridge mechanical seal with a circumferentially tight structure according to claim 3, characterized in that: The transfer carrier assembly includes: A support sleeve, which passes through the matching bearing in the axial direction, has an outer wall that abuts against the inner wall of the matching bearing, has an inner end that extends to the rear of the assembly end ring, and an outer end that extends to the front of the support end tube, and the transmission core shaft passes through the support sleeve in the axial direction; The supporting flange is formed at the inner end of the supporting sleeve, extends along the circumference of the supporting sleeve, and is rolled toward the positioning convex ring.

5. A cartridge mechanical seal with a circumferentially tight structure according to claim 4, characterized in that: The tight fit positioning assembly includes: A group of tight-fitting slots is provided, each of which is formed at the outer end of the support sleeve, penetrates both sides of the support sleeve in the radial direction, and extends along the axial direction of the support sleeve, and each of the tight-fitting slots is arranged in sequence along the circumference of the support sleeve; A tightening hoop, which is wrapped around the outer end of the carrier sleeve and corresponds to the position of the tightening slot, and has an adjusting fracture inside, so that it can shrink inward or expand outward together with the outer end of the carrier sleeve, and a guide arc surface is provided on the outer wall of the tightening hoop, which extends along the axial direction of the tightening hoop, and the middle part of which protrudes radially toward the outside of the tightening hoop; A tight inner ring, which is sleeved on the outer wall of the tight hoop and located at the inner end of the tight hoop, and whose inner wall is provided with an inner end inclined surface adapted to the guide arc surface; The tightening outer ring is sleeved on the outer wall of the tightening hoop and is located at the outer end of the tightening hoop. The inner wall of the tightening outer ring is provided with an outer end inclined surface adapted to the guide arc surface. The tightening outer ring and the tightening inner ring are locked by a tightening bolt rod extending axially, so that the outer end of the supporting sleeve is clamped on the outer wall of the transmission core shaft.

6. The cartridge mechanical seal with a circumferentially tight structure according to claim 4, characterized in that: The fixed seal assembly includes: A fixed seat ring, which is installed in the assembly end ring, and whose inner end cooperates with the positioning convex ring through an axial guide structure, and can be adjusted in the axial direction in the assembly end ring; A fixed compression spring is provided in a group, each of which is installed in a positioning convex ring, extends axially, and abuts against a fixed seat ring.

7. A cartridge mechanical seal with a circumferentially tight structure according to claim 6, characterized in that: The movable seal assembly includes: The movable swivel is installed at the connection part between the support flange and the support sleeve through a circumferential positioning structure, and can rotate together with the support sleeve and the support flange, and is in contact with the fixed seat ring.

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