Half-split water retaining ring for axially split pump packing seal

Abstract

The utility model discloses a split-half water retaining ring for axially split pump packing seal, which belongs to the technical field of water retaining rings and comprises a half water retaining ring and a sealing component, and the half water retaining ring is connected with the sealing component. The number of the half water retaining rings is two, the two half water retaining rings are arranged in a central symmetry mode, each half water retaining ring is arranged to be in a semicircular ring shape, each half water retaining ring comprises a water retaining ring body and a fixing part, and the two water retaining ring bodies are connected through the fixing parts. By means of the mode, the two water retaining ring bodies are arranged in a separated mode, the axially split pump does not need to be disassembled during disassembly and assembly, maintenance is convenient, and a large amount of manpower and material resources are saved.

Description

Technical Field

[0001] This utility model relates to the field of water-retaining ring technology, specifically to a split-type water-retaining ring used for packing seals in split-case pumps. Background Technology

[0002] Split-case pumps are widely used in power plants, water conservancy and water management, petrochemicals, papermaking, irrigation, sand dredging and other fields. During the operation of split-case pumps, water-retaining rings are often used to isolate leaking water at the packing and prevent it from entering the bearing chamber.

[0003] For example, Chinese patent application CN111577612B describes a water pump baffle structure. The water pump includes a pump body and a motor. The pump body is equipped with a motor-driven impeller. The impeller is sleeved on one end of a rotating shaft and has a mechanical seal on its inner side. The pump body and the motor are fastened together by a bracket. The bracket is set on the corresponding end faces of the pump body and the motor and sleeved on the rotating shaft. The rotating shaft is arranged laterally. A baffle is sleeved on the rotating shaft between the pump body and the motor. The baffle is interference-fitted with the rotating shaft. The baffle includes an annular part and a disc-shaped part. The bottom of the disc-shaped part is connected to the annular part. The annular part is closer to the pump body, and the disc-shaped part is closer to the motor.

[0004] However, when the water pump is in normal use, replacing the water baffle ring requires disassembling the water pump, which is labor-intensive and costly.

[0005] Based on this, this utility model designs a split-type water-retaining ring for packing seals of split-case pumps to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a split-type water baffle ring for packing seal of split-case pump.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A split-type water-retaining ring for packing seal of split-case pumps includes a half water-retaining ring, a sealing assembly, and a pressure-bearing fitting assembly;

[0009] The semi-water-blocking ring is connected to the sealing assembly and the pressure-bearing bonding assembly;

[0010] Two semi-water-blocking rings are provided, and the two semi-water-blocking rings are symmetrically arranged at the center. The semi-water-blocking rings are set as semi-circular rings, and each semi-water-blocking ring includes a water-blocking ring body and a fixing component. The two water-blocking ring bodies are connected by the fixing component.

[0011] Furthermore, the fixing component includes bolts, a receiving groove is provided on one side of the water-blocking ring body, a through hole for use with the bolt is provided inside the receiving groove, and a threaded hole is provided on the other side of the water-blocking ring body. The two water-blocking ring bodies are fixedly connected by bolts.

[0012] Furthermore, a gap is provided between the two water-blocking ring bodies, with the gap distance set to 2mm.

[0013] Furthermore, the inner diameter of the water baffle ring body is the same as the shaft diameter of the corresponding split-case pump main shaft, with a tolerance of H8. The outer diameter of the water baffle ring body is twice the size of the inner diameter of the water baffle ring body, and the thickness is 12~14mm.

[0014] Furthermore, the sealing assembly includes an O-ring located inside the two water-blocking ring bodies. The two water-blocking ring bodies have sealing grooves on their inner sides, and the O-rings are located inside the sealing grooves and are sealed and engaged with the water-blocking ring bodies.

[0015] Furthermore, there are two pressure-bearing bonding components, which are located at the rear ends of the two water-blocking ring bodies respectively.

[0016] Furthermore, the pressure-bearing fitting component includes a pressure plate and an airbag. The rear end of the water-blocking ring body has an annular groove, and the inner side of the annular groove has a sliding groove for use with the pressure plate. The pressure plate is located inside the annular groove and is slidably connected to the water-blocking ring body. The airbag is fixedly installed between the water-blocking ring body and the pressure plate.

[0017] Furthermore, the pressure plate is a semi-circular plate with an L-shaped cross-section.

[0018] Compared with the prior art, the advantages of this utility model are as follows: 1. By separating the two water baffle ring bodies, it is not necessary to disassemble the split pump during disassembly and assembly, which makes maintenance convenient and saves a lot of manpower and material resources;

[0019] 2. By setting the two water baffle rings in a symmetrical manner, the problem of rotor imbalance caused by the center of gravity imbalance is avoided. The setting of the pressure plate and air bag allows the two water baffle rings to fit tightly against the inner wall of the split-case pump and be firmly fixed. The gap between the two half water baffle rings ensures that the two water baffle rings fit tightly against the split-case pump main shaft. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a split-type water-retaining ring for packing seal of a split-case pump according to the present invention.

[0022] Figure 2 This is a front view of a split-type water baffle ring for packing seal of a split-case pump according to the present invention;

[0023] Figure 3 This is a cross-sectional disassembly view of a split-type water baffle ring for packing seal of a split-case pump according to the present invention.

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0025] Figure 5 This is a perspective view of the main body of the water-retaining ring of this utility model.

[0026] The labels in the diagram represent:

[0027] 1. Half water-blocking ring; 11. Water-blocking ring body; 12. Bolt; 13. Receiving groove; 2. Sealing assembly; 21. O-ring; 22. Sealing groove; 3. Pressure-bearing fitting assembly; 31. Pressure plate; 32. Airbag; 33. Ring groove; 34. Sliding groove; 35. Protrusion; 36. Shallow groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0030] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-5 A split-type water-retaining ring for packing seal of split-case pump, comprising a half water-retaining ring 1, a sealing assembly 2, and a pressure-bearing fitting assembly 3;

[0031] The semi-water-blocking ring 1 is connected to the sealing assembly 2 and the pressure-bearing bonding assembly 3;

[0032] Two semi-water-blocking rings 1 are provided, and the two semi-water-blocking rings 1 are symmetrically arranged at the center. The semi-water-blocking rings 1 are set as semi-circular rings. Each semi-water-blocking ring 1 includes a water-blocking ring body 11 and a fixing component. The two water-blocking ring bodies 11 are connected by the fixing component.

[0033] When the split-type water baffle ring used for packing seal of split-case pump is in normal use, the sealing component 2 is sleeved on the main shaft of the split-case pump, and the two water baffle ring bodies 11 are attached to the sealing component 2 from both sides and installed using fixing parts. The separation of the two water baffle ring bodies 11 makes it possible to disassemble the split-case pump without disassembling it, which is convenient for maintenance and saves a lot of manpower and material resources.

[0034] The fixing component includes a bolt 12, a receiving groove 13 is provided on one side of the water-blocking ring body 11, a through hole for use with the bolt 12 is provided inside the receiving groove 13, and a threaded hole is provided on the other side of the water-blocking ring body 11. The two water-blocking ring bodies 11 are fixedly connected by the bolt 12.

[0035] The two water-blocking ring bodies 11 are fitted with a gap, the distance of which is set to 2mm.

[0036] The inner diameter of the water baffle ring body 11 is the same as the shaft diameter of the corresponding split-case pump main shaft, with a tolerance of H8. The outer diameter of the water baffle ring body 11 is twice the size of the inner diameter of the water baffle ring body 11, and the thickness is 12~14mm.

[0037] like Figure 1 and Figure 3 As shown, the sealing assembly 2 includes an O-ring 21, which is located inside the two water-blocking ring bodies 11. A sealing groove 22 is provided inside the two water-blocking ring bodies 11, and the O-ring 21 is located inside the sealing groove 22 and is sealed and snapped into the water-blocking ring body 11.

[0038] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, there are two pressure-bearing bonding components 3, which are located at the rear ends of the two water-blocking ring bodies 11 respectively.

[0039] The pressure-bearing bonding component 3 includes a pressure plate 31 and an airbag 32. The rear end of the water-blocking ring body 11 is provided with an annular groove 33. The inner side of the annular groove 33 is provided with a sliding groove 34 for use with the pressure plate 31. The pressure plate 31 is located inside the annular groove 33 and is slidably connected to the water-blocking ring body 11. The airbag 32 is fixedly disposed between the water-blocking ring body 11 and the pressure plate 31.

[0040] The pressure plate 31 is a semi-circular plate with an L-shaped cross section.

[0041] The pressure-bearing bonding component 3 also includes a protrusion 35, which is fixedly disposed on one side of the pressure plate 31 that is in contact with the water-blocking ring body 11. A shallow groove 36 is correspondingly provided on the water-blocking ring body 11 to cooperate with the protrusion 35 for sliding engagement.

[0042] In normal use, the split-type water-retaining ring used for packing seals of split-case pumps involves fitting the O-ring 21 onto the main shaft of the split-case pump, with the two water-retaining ring bodies 11 adhering to the O-ring 21 from both sides. The O-ring 21 is then inserted into the sealing groove 22, and bolts 12 are used to secure the two water-retaining ring bodies 11 from the receiving groove 13. When the water-retaining ring body 11 is under pressure, the pressure plate 31 slides along the water-retaining ring body 11, compressing the air bladder 32. The air bladder 32 expands outwards, adhering to the inner wall of the split-case pump, and the protrusion 35... The shallow groove 36 is used to slide and snap together to prevent the pressure plate 31 from detaching from the water baffle body 11 when it is removed. The two water baffle bodies 11 are centrally symmetrically arranged to avoid the problem of rotor imbalance caused by the center of gravity being unbalanced. The pressure plate 31 and the air bag 32 are arranged to ensure that the two water baffle bodies 11 can fit tightly against the inner wall of the split-case pump and be firmly fixed. The gap between the two half water baffles 1 ensures that the two water baffle bodies 11 fit tightly against the split-case pump main shaft.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A split-type water-retaining ring for packing seals of split-case pumps, comprising a half-water-retaining ring (1), characterized in that: It also includes a sealing assembly (2) and a pressure-adhesive assembly (3), wherein the semi-water-blocking ring (1) is connected to the sealing assembly (2) and the pressure-adhesive assembly (3); Two semi-water-blocking rings (1) are provided, and the two semi-water-blocking rings (1) are symmetrically arranged in the center. The semi-water-blocking rings (1) are set as semi-circular rings. The semi-water-blocking rings (1) include a water-blocking ring body (11) and a fixing component. The two water-blocking ring bodies (11) are connected by the fixing component. The fixing component includes a bolt (12), and a receiving groove (13) is provided on one side of the water-blocking ring body (11).

2. The split-type water-retaining ring for packing seal of a split-case pump according to claim 1, characterized in that, The inner side of the receiving groove (13) is provided with a through hole for use with the bolt (12), and the other side of the water-blocking ring body (11) is provided with a threaded hole. The two water-blocking ring bodies (11) are fixedly connected by bolts (12).

3. The split-type water-retaining ring for packing seal of a split-case pump according to claim 1, characterized in that, The two water-blocking ring bodies (11) are fitted with a gap, and the gap distance is set to 2mm.

4. The split-type water-retaining ring for packing seal of a split-case pump according to claim 1, characterized in that, The inner diameter of the water baffle body (11) is the same as the shaft diameter of the corresponding split-case pump main shaft, with a tolerance of H8. The outer diameter of the water baffle body (11) is twice the size of the inner diameter of the water baffle body (11), and the thickness is 12~14mm.

5. The split-type water-retaining ring for packing seal of a split-case pump according to claim 1, characterized in that, The sealing assembly (2) includes an O-ring (21), which is located inside the two water-blocking ring bodies (11). A sealing groove (22) is provided inside the two water-blocking ring bodies (11), and the O-ring (21) is located inside the sealing groove (22) and is sealed and snapped into the water-blocking ring body (11).

6. The split-type water-retaining ring for packing seal of a split-case pump according to claim 1, characterized in that, There are two pressure-adhesive components (3), and the two pressure-adhesive components (3) are located at the rear ends of the two water-blocking ring bodies (11).

7. The split-type water-retaining ring for packing seal of a split-case pump according to claim 6, characterized in that, The pressure-bearing fitting component (3) includes a pressure plate (31) and an airbag (32). The rear end of the water-blocking ring body (11) is provided with an annular groove (33). The inner side of the annular groove (33) is provided with a sliding groove (34) for use with the pressure plate (31). The pressure plate (31) is located inside the annular groove (33) and is in a sliding connection with the water-blocking ring body (11). The airbag (32) is fixedly installed between the water-blocking ring body (11) and the pressure plate (31).

8. The split-type water-retaining ring for packing seal of a split-case pump according to claim 7, characterized in that, The pressure plate (31) is a semi-circular plate with an L-shaped cross section.

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