Split quick-change sealing ring

Abstract

The utility model discloses a split type quick change sealing ring. The sealing ring is composed of a first half ring and a second half ring, and a limiting shoulder is formed on the radial outer side; an outer circular arc surface of the limiting shoulder is provided with a ring pump limiting groove, which cooperates with a ring pump limiting key on the inner wall of the pump body to limit the circumferential rotation; meanwhile, a dismounting groove is arranged along the circumference, and a yielding passage is formed when the dismounting groove is aligned with the ring pump limiting key, so that the sealing ring can be axially mounted or taken out without the need of pulling out the shaft. The half ring abutting surface is provided with a ring ring limiting key and a ring ring limiting groove to limit the radial and axial misalignment and make the end faces flush. The structure realizes quick mounting and dismounting, reliable rotation stopping and repeated positioning, has good introduction and low risk of jamming, and is suitable for the interstage sealing of a multistage centrifugal pump.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump sealing and maintenance technology, and in particular to a split quick-change sealing ring, which is suitable for multi-stage centrifugal pumps and other applications where the sealing ring needs to be quickly replaced within the pump body. Background Technology

[0002] Interstage seals in multistage centrifugal pumps are high-frequency maintenance components: integral seals often require shaft removal or major disassembly, resulting in prolonged downtime; split / easy-to-disassemble solutions mostly rely on screws / pressure rings, involving multiple steps and requiring precise alignment; they are prone to jamming under particle conditions, and reassembly consistency and anti-rotation reliability are insufficient. Existing technologies (CN210859321U, CN219654943U, CN211082372U) involve split / easy-to-disassemble or sliding locking mechanisms, but they generally rely on screws or universal locking mechanisms, failing to integrate the quick-change channel for "alignment and repositioning" with circumferential anti-rotation.

[0003] Therefore, there is an urgent need for a split sealing ring structure that can be quickly assembled and disassembled, reliably prevented from rotating, and repositioned without the need for shaft removal. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a split quick-change sealing ring that can be quickly installed and disassembled without the need for shaft removal, reliably stops rotation, and is easy to reposition.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a split-type quick-change sealing ring, comprising a first half-ring 1 and a second half-ring 2, the outer radial sides of which together form a limiting shoulder 9 for axial positioning; the outer arc surface of the limiting shoulder 9 is provided with at least one ring pump limiting groove 4, which cooperates with the ring pump limiting key 8 on the inner wall of the sealing ring mounting hole of the pump body 7 to restrict circumferential rotation; the outer arc surface of the limiting shoulder 9 is also provided with at least one disassembly groove 3 along the circumferential direction, which forms a clearance channel when the disassembly groove 3 is aligned with the ring pump limiting key 8, so that the sealing ring can be installed or removed axially.

[0006] As a preferred technical solution of this utility model, the axial cross-section of the first half-ring 1 is provided with an annular limiting groove 6, and the axial cross-section of the second half-ring 2 is provided with an annular limiting key 5 that cooperates with it, which is used to limit the radial and axial misalignment when the half-rings are engaged and to make the end faces flush.

[0007] As a preferred technical solution of this utility model, the width of the disassembly groove 3 is not less than the key width of the ring pump limiting key 8, and the groove depth is not less than the key height of the ring pump limiting key 8.

[0008] As a preferred technical solution of this utility model, the ring pump limiting groove 4 and the disassembly groove 3 are correspondingly arranged in the circumferential direction, and each ring pump limiting groove 4 has a disassembly groove 3 on the same side of the circumference.

[0009] As a preferred technical solution of this utility model, the ring pump limiting groove 4 is a circumferential non-through groove extending along the circumferential direction, and its groove opening is provided with a chamfer or guide slope.

[0010] As a preferred technical solution of this utility model, the mating structure between the ring-shaped limiting key 5 and the ring-shaped limiting groove 6 is any one of a cylindrical pin, a semi-circular tenon, or a dovetail groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Quick assembly and disassembly: By aligning the disassembly groove 3 with the ring pump limit key 8, a clearance channel is formed, enabling axial insertion / retraction of the sealing ring without the need for shaft removal, significantly shortening downtime; 2. Reliable anti-rotation: The ring pump limiting groove 4 and the ring pump limiting key 8 cooperate to stably limit the circumferential rotation of the sealing ring and suppress slippage and abrasion during operation; 3. Repeated positioning: When the ring-ring limiting key 5 and the ring-ring limiting groove 6 are engaged, they restrict radial and axial misalignment, making the end faces of the two half rings flush, improving the consistency of assembly and the geometric stability of the sealing channel. 4. Assembly error tolerance and anti-jamming: The chamfer / guide slope of the four slots of the ring pump limit groove improves the guideability and reduces the risk of particle jamming and scratches; 5. Simple structure and easy to promote: quick change and anti-rotation are achieved only through limiting shoulders and a few keyways, without the need for additional fasteners, resulting in low manufacturing and modification costs. It is suitable for scenarios such as interstage sealing rings in multi-stage pumps. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top view (split-opening) structural schematic diagram of this utility model; Figure 3 This is a schematic diagram of the lateral (split-opening) structure of this utility model; Figure 4 This is a cross-sectional view of the present invention along its axial direction. Figure 5 This is a schematic cross-sectional view of the pump body end of this utility model; In the diagram: 1. First half ring; 2. Second half ring; 3. Disassembly groove; 4. Ring pump limit groove; 5. Ring limit key; 6. Ring limit groove; 7. Pump body; 8. Ring pump limit key; 9. Limit shoulder. Detailed Implementation

[0013] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0014] In the attached diagram, all identical reference numerals refer to the same components.

[0015] like Figure 1-5 As shown, this utility model provides a split-type quick-change sealing ring, including a first half-ring 1 and a second half-ring 2, which together form a limiting shoulder 9 for axial positioning on their radially outer sides. The outer arc surface of the limiting shoulder 9 is provided with at least one ring pump limiting groove 4, which cooperates with the ring pump limiting key 8 on the inner wall of the sealing ring mounting hole of the pump body 7 to restrict circumferential rotation; the outer arc surface of the limiting shoulder 9 is also provided with at least one disassembly groove 3 along the circumference, which forms a clearance channel when the disassembly groove 3 is aligned with the ring pump limiting key 8, so that the sealing ring can be installed or removed axially. In order to achieve flush and stable positioning of the two half-rings, the axial cross-section of the first half-ring 1 is provided with a ring-ring limiting groove 6, and the axial cross-section of the second half-ring 2 is provided with a ring-ring limiting key 5 that cooperates with it, which restricts radial and axial misalignment and makes the end faces flush when they are aligned.

[0016] The utility model can be used in the following ways: 1. Align the first half-ring 1 and the second half-ring 2 around the shaft so that the ring-ring limiting key 5 and the ring-ring limiting groove 6 are properly engaged and the end faces are flush. 2. Rotate the sealing ring assembly relative to the pump body 7 until the disassembly groove 3 is aligned with the ring pump limit key 8 to form a clearance channel; 3. Push the sealing ring into the mounting hole along the axial direction until the limiting shoulder 9 fits and is positioned against the corresponding end face of the pump body. Then, rotate the sealing ring slightly in the circumferential direction to make the ring pump limiting groove 4 engage with the ring pump limiting key 8 to complete the anti-rotation and reset. 4. Disassembly should be performed in reverse order: first rotate the sealing ring back to align it with the disassembly groove 3 and the ring pump limit key 8, and then pull it out axially.

[0017] Furthermore, the width of the disassembly groove 3 is not less than the key width of the ring pump limit key 8, and the groove depth is not less than the key height of the ring pump limit key 8, so as to ensure that a smooth clearance channel is formed during alignment and to take into account assembly tolerances.

[0018] Furthermore, the ring pump limiting groove 4 and the disassembly groove 3 are correspondingly arranged in the circumferential direction, and each ring pump limiting groove 4 is provided with a disassembly groove 3 on the same side of the circumference, which makes it easy to switch between the "locking / yielding" two work positions by rotating at a small angle during operation.

[0019] Furthermore, the ring pump limiting groove 4 is a non-through groove extending in the circumferential direction, and its opening is provided with a chamfer or guide slope to improve the guideability of the ring pump limiting key 8 and reduce the risk of particle jamming and scratching.

[0020] Furthermore, the mating structure of the ring-shaped limiting key 5 and the ring-shaped limiting groove 6 can be any one of a cylindrical pin, a semi-circular tenon, or a dovetail groove. Preferably, one or more locations can be selected in the circumferential direction to meet the assembly stability requirements under different size specifications.

[0021] Furthermore, the ring pump limit key 8 can be installed on the inner wall of the sealing ring mounting hole of the pump body 7 by means of threaded connection, interference fit or locating pin-screw composite fixation; the sealing ring body can be made of wear-resistant stainless steel, copper alloy or engineering ceramic material, and surface hardening treatment or coating treatment can be performed on the outer arc surface or groove of the limit shoulder 9 according to the working conditions.

[0022] Furthermore, preferably, provided that the claims are satisfied, the disassembly groove 3 can be designed as one of a straight groove, a stepped groove, or a partially widened groove that penetrates the thickness of the limiting shoulder 9, in order to accommodate the insertion requirements of ring pump limiting keys 8 of different specifications and assembly tools.

[0023] This utility model is a split quick-change sealing ring with a simple structure, which can be quickly assembled and disassembled without removing the shaft and has reliable anti-rotation and repeatable positioning. It is suitable for multi-stage centrifugal pumps and other ring components that need to be quickly maintained and replaced inside the housing.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A split-type quick-change sealing ring, installed on a pump body (7), comprising a first half-ring (1) and a second half-ring (2), characterized in that, The two radially outer sides together form a limiting shoulder (9) for axial positioning; The outer arc surface of the limiting shoulder (9) is provided with at least one ring pump limiting groove (4), which cooperates with the ring pump limiting key (8) on the inner wall of the sealing ring mounting hole of the pump body (7) to limit circumferential rotation. The outer arc surface of the limiting shoulder (9) is also provided with at least one disassembly groove (3) along the circumferential direction. When the disassembly groove (3) is aligned with the ring pump limiting key (8), a clearance channel is formed so that the sealing ring can be installed or removed along the axial direction.

2. The split-type quick-change sealing ring according to claim 1, characterized in that, The first half-ring (1) has an axial section with a ring-ring limiting groove (6), and the second half-ring (2) has an axial section with a matching ring-ring limiting key (5) to limit radial and axial misalignment when the half-rings are engaged and to make the end faces flush.

3. A split-type quick-change sealing ring according to claim 2, characterized in that, The width of the disassembly groove (3) is adapted to the key width of the ring pump limit key (8), and the depth of the disassembly groove (3) is adapted to the key height of the ring pump limit key (8).

4. A split-type quick-change sealing ring according to claim 1, characterized in that, The ring pump limiting groove (4) and the disassembly groove (3) are correspondingly arranged in the circumferential direction, and each ring pump limiting groove (4) has a disassembly groove (3) on the same side of the circumferential direction.

5. A split-type quick-change sealing ring according to any of the preceding claims, characterized in that, The ring pump limiting groove (4) is a non-through groove extending along the circumference, and its opening is provided with a chamfer or guide slope.

6. A split-type quick-change sealing ring according to claim 2, characterized in that, The mating structure between the ring-shaped limiting key (5) and the ring-shaped limiting groove (6) is any one of cylindrical pin, semi-circular tenon or dovetail groove.

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