A device for quick disassembly of centrifugal pump impeller, mechanical seal or bearing

Abstract

This utility model discloses a device for the rapid disassembly of centrifugal pump impellers, mechanical seals, or bearings, belonging to the technical field of mechanical maintenance tools. The device includes a linear drive assembly, a mounting assembly, and a movable hook assembly. The mounting assembly includes a mounting beam; the linear drive assembly includes a jack and a manual pump, with the manual pump connected to the jack via a hydraulic pipe; after assembly, the jack's jack cone extends towards the pump shaft inside the centrifugal pump, and the jack cone and pump shaft are arranged coaxially; the movable hook assembly includes hook I and hook II. Hook I has a through hole I at one end and a locking piece I at the other end; hook II has a through hole II at one end and a locking piece II at the other end; hook I and hook II are respectively distributed on both sides of the jack. Through the mounting assembly, linear drive assembly, and movable hook assembly, precise, rapid, and efficient disassembly of impellers, mechanical seals, or bearings can be achieved.

Description

Technical Field

[0001] This utility model specifically relates to a device suitable for the quick disassembly of centrifugal pump impellers, mechanical seals, or bearings, belonging to the technical field of mechanical maintenance tools. Background Technology

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. Its working principle involves: the high-speed rotation of the impeller generates centrifugal force, throwing the liquid from the center of the impeller to the outer edge, creating a low-pressure zone to draw in the liquid, and simultaneously converting kinetic energy into pressure energy for continuous transport. The impeller is the core component of the centrifugal pump, responsible for converting mechanical energy into the kinetic and pressure energy of the liquid; the mechanical seal is a key component to prevent liquid leakage within the centrifugal pump, widely used in sealing applications involving high temperature, high pressure, corrosive media, or flammable and explosive media; and the bearing is the core component ensuring the stable operation of the pump shaft, providing support, positioning, load bearing, and friction reduction. Currently, the disassembly of the impeller, mechanical seal, or bearings of centrifugal pumps mainly relies on traditional pullers or hydraulic devices, which have the following drawbacks:

[0003] 1. Impeller is easily damaged: During disassembly, due to unstable fixing, the impeller is easily deformed or worn by external impact or torsion. For example, the claws of the manual puller are prone to slippage, resulting in uneven force on the impeller and deformation; the hydraulic device lacks an anti-rotation mechanism, and the impeller is prone to rotating with the ejection action, damaging the sealing surface;

[0004] Second, low efficiency: Existing tools have poor compatibility, requiring frequent replacement of parts to match different specifications of impellers, mechanical seals, or bearings, making operation cumbersome. For example, for impellers of different specifications, due to the fixed dimensions of the chucks or push rods, tools need to be frequently changed to adapt to different impeller specifications; disassembly of irregularly shaped impellers (such as non-standard flange hole positions) is difficult;

[0005] III. Safety Hazards: When manually fixing the impeller, safety accidents may occur due to tool slippage or uneven force; in addition, uncontrolled pressure in the hydraulic system may cause parts to splash.

[0006] Although the prior art CN214661092U discloses "a special tool for disassembling a multi-stage centrifugal pump impeller", it has shortcomings such as low transmission efficiency (relying on manual rotation of the handle, requiring multiple operations to complete the lifting, and the efficiency is far lower than that of a hydraulic system), slow return speed (requiring manual reverse rotation of the handle, which takes a long time), large size and weight (the screw jack is bulky, inconvenient to carry, and requires a rocker arm, so it cannot work in a confined space); and it is only suitable for vertically placed impellers (however, most impellers are horizontally placed). CN214237986U discloses "a centrifugal pump impeller disassembly and assembly tool", which involves two support arms. During operation, the two support arms cannot provide the same force, which can easily damage the impeller when pulling; and the rear end of the impeller has a housing, making it inconvenient to tighten the screws at the end of the support arms.

[0007] Therefore, there is an urgent need for a specialized tool that is efficient, safe, and highly adaptable for quick disassembly of centrifugal pump impellers, mechanical seals, or bearings to meet practical needs. Summary of the Invention

[0008] To address the aforementioned problems in existing technologies, a device suitable for the rapid disassembly of centrifugal pump impellers, mechanical seals, or bearings is proposed. In this technical solution, through the arrangement of mounting components, linear drive components, and movable hook components, precise, rapid, and efficient disassembly of impellers, mechanical seals, or bearings is achieved.

[0009] To achieve the above technical objectives, the following technical solution is proposed:

[0010] The purpose of this technical solution is to provide: a device suitable for quick disassembly of centrifugal pump impellers, mechanical seals, or bearings, comprising a linear drive assembly, a mounting assembly, and a movable hook assembly, wherein,

[0011] Installation components: including installation beams;

[0012] Linear drive assembly: This includes a jack and a manual pump, with the manual pump connected to the jack via a hydraulic pipe. After assembly, the jack's jacking cone extends towards the pump shaft inside the centrifugal pump, and the jacking cone and pump shaft are coaxially aligned. The jack and manual pump provide axial ejection power for linear drive, enabling the hook to pull the impeller, mechanical seal, or bearing off the pump shaft at a uniform speed and with balanced tension, thus separating the impeller, mechanical seal, or bearing from the pump shaft. Furthermore, the jack and manual pump configuration allows for a dual hydraulic + mechanical drive mode, facilitating rapid assembly and, consequently, quick disassembly and assembly of the impeller, mechanical seal, or bearing.

[0013] The movable hook assembly includes hook I and hook II. Hook I has a through hole I at one end for fitting onto the mounting beam, and a clamp I at the other end for fixing the impeller, mechanical seal, or bearing. Hook II has a through hole II at one end for fitting onto the mounting beam, and a clamp II at the other end for fixing the impeller, mechanical seal, or bearing. Hook I and hook II are respectively distributed on both sides of the jack.

[0014] Preferably, the end face of the top cone engages with the front end of the pump shaft inside the centrifugal pump. For example, the end face of the top cone is a conical sawtooth surface that meshes with the groove at the front end of the pump shaft inside the centrifugal pump. This arrangement ensures that the end face of the top cone meshes with the front end of the pump shaft, thereby ensuring the stability between the top cone and the pump shaft and preventing the pump shaft from rotating. Ultimately, this allows the impeller, mechanical seal, or bearing to be removed from the pump shaft.

[0015] Preferably, the jack is equipped with a quick-connect plug, and the hydraulic hose is detachably connected to the quick-connect plug (connected in the working state and detachable in the non-working state). This design ensures that the jack, hydraulic hose, and manual pump are designed as separate units, making them more convenient to carry; and that assembly is quicker during use.

[0016] Preferably, hook I is fixed to the mounting beam by an adjustable fastener I (e.g., screwed in or out), and hook II is fixed to the mounting beam by an adjustable fastener II (e.g., screwed in or out). Both fastener I and fastener II are bolts; fastener I and fastener II are used to fix hook I and hook II respectively, and the distance between hook I and hook II can be adjusted by adjusting fastener I and fastener II; the bolts can be tightened by hand, making it more convenient.

[0017] Preferably, the outer side of the mounting beam is provided with a groove for limiting fastener I and fastener II. The end of hook I is provided with a threaded hole I for installing fastener I, and threaded hole I communicates with through hole I; the end of hook II is provided with a threaded hole II for installing fastener II, and threaded hole II communicates with through hole II. This arrangement ensures that hook I and hook II can effectively slide and be limited on the mounting beam, and facilitates adjustment of the distance between hook I and hook II.

[0018] Preferably, both clip I and clip II are L-shaped, which facilitates their attachment to the impeller, mechanical seal, or bearing, and also ensures more stable fixation. Both clip I and clip II have elastic elements on their inner sides for cushioning, shock absorption, and frictional resistance. These elastic elements are made of polyurethane, ethylene propylene rubber, fluororubber, or silicone rubber elastomers.

[0019] Preferably, the mounting beam has a mounting frame for fixing the jack on its lower side; the mounting frame includes a mounting frame for mounting the jack body and a mounting cylinder for mounting the jack cone, and the mounting cylinder and the mounting frame are connected by threads.

[0020] In this technical solution, the positional relationships involved, such as "upper", "axial direction", "one end", "the other end", "end", "end face", "front end", "both sides", "inner side", "inner", and "lateral", are defined according to the actual usage conditions and are conventional terms in this technical field, as well as conventional terms used by those skilled in the art in actual use.

[0021] The beneficial technical effects of adopting this technical solution include:

[0022] (1) In this utility model, the impeller, mechanical seal or bearing can be disassembled accurately, quickly and efficiently by setting up the mounting components, linear drive components and movable hook components;

[0023] (2) In this utility model, the design of the sliding groove on the mounting beam and the movable hook assembly is suitable for impellers, mechanical seals or bearings of different sizes, and has a wide range of applications.

[0024] (3) This utility model has a simple structure and reasonable design, which can effectively avoid damage to the impeller, mechanical seal or bearing, and improve operational safety. Attached Figure Description

[0025] Figure 1 This is a top sectional view (I) of the present invention.

[0026] Figure 2 This is a top sectional view (II) of the present invention.

[0027] Figure 3 This is a schematic diagram (right view) showing the installation status of the mounting beam, hook I, and hook II involved in this utility model.

[0028] Figure 4 This is the schematic diagram of the apex cone structure in this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of hook I in this utility model;

[0030] Figure 6 This is a cross-sectional view of hook I in this utility model;

[0031] Figure 7 This is the structural schematic of hook II in this utility model;

[0032] Figure 8 This is a cross-sectional view of hook II in this utility model;

[0033] Figure 9 This is a schematic diagram of the mounting frame for the jack in Example 6;

[0034] Figure 10 This is a partial schematic diagram of the arrangement of the mounting beam, hook I, fastener I, through hole I, threaded hole I, and slide groove in Example 7.

[0035] In the diagram, 1 is the mounting component, 11 is the mounting beam, and 12 is the chute.

[0036] 2. Linear drive assembly; 21. Jack; 22. Manual pump; 23. Hydraulic hose; 24. Jack cone; 25. Quick connector.

[0037] 3. Movable hook assembly, 31. Hook I, 311. Through hole I, 312. Clip I, 313. Threaded hole I, 32. Hook II, 321. Through hole II, 322. Clip II, 323. Threaded hole II, 33. Fastener I, 34. Fastener II, 35. Elastic element;

[0038] 4. Impeller;

[0039] 5. Pump shaft;

[0040] 6. Mounting bracket; 61. Mounting frame; 62. Mounting cylinder. Detailed Implementation

[0041] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0042] Example 1

[0043] The purpose of this technical solution is to provide: a device suitable for quick disassembly of the impeller 4, mechanical seal, or bearing of a centrifugal pump, such as... Figure 1-2 As shown, it includes a linear drive assembly 2, a mounting assembly 1, and a movable hook assembly 3, wherein,

[0044] Mounting component 1: includes mounting beam 11. In one specific embodiment, mounting beam 11 is arranged horizontally and is mainly used to install movable hook assembly 3, ensuring that hook I 31 in movable hook assembly 3, mounting beam 11 and hook II 32 in movable hook assembly 3 form a frame for fixing impeller 4, mechanical seal or bearing.

[0045] Linear drive assembly 2 includes a jack 21 and a manual pump 22. The manual pump 22 is connected to the jack 21 via a hydraulic pipe 23 (specifically, this connection can be fixed or detachable). After assembly, in the working mode, the jack cone 24 in the jack 21 extends towards the pump shaft 5 inside the centrifugal pump, and the jack cone 24 and the pump shaft 5 are arranged coaxially. The jack 21 and the manual pump 22 provide axial ejection power for linear drive, enabling the hook to pull the impeller 4, mechanical seal, or bearing from the pump shaft 5 at a uniform speed and with balanced tension, thus separating the impeller 4, mechanical seal, or bearing from the pump shaft 5. Furthermore, the arrangement of the jack 21 and the manual pump 22 allows this device to adopt a hydraulic + mechanical dual-drive mode, facilitating rapid assembly and thus enabling quick disassembly and assembly of the impeller 4, mechanical seal, or bearing.

[0046] The movable hook assembly 3 includes hook I 31 and hook II 32. Hook I 31 has a through hole I 311 at one end for fitting onto the mounting beam 11, and a clamp I 312 at the other end for fixing the impeller 4, mechanical seal, or bearing. Hook II 32 has a through hole II 321 at one end for fitting onto the mounting beam 11, and a clamp II 322 at the other end for fixing the impeller 4, mechanical seal, or bearing. Hook I 31 and hook II 32 are respectively distributed on both sides of the jack 21. In one specific embodiment, hook I 31 and hook II 32 are arranged in parallel to ensure that the impeller 4, mechanical seal, or bearing receives a balanced fixing force, thereby reducing damage to the impeller 4, mechanical seal, or bearing due to unbalanced forces. The through holes I311 at the end of hook I31 and II321 at the end of hook II32 allow hook I31 and hook II32 to slide on the mounting beam 11, thereby adjusting the distance between hook I31 and hook II32 to accommodate impellers, mechanical seals or bearings of different sizes.

[0047] Example 2

[0048] Based on Example 1, this example further improves the top cone 24:

[0049] The end face of the top cone 24 mates with the front end of the pump shaft 5 inside the centrifugal pump, as shown in the example: Figure 4 As shown, the end face of the top cone 24 is a tapered serrated surface that meshes with the groove at the front end of the pump shaft 5. In other words, the end face of the top cone 24 is a tapered serrated surface to fit the groove at the front end of the pump shaft 5. This design ensures that the end face of the top cone 24 meshes with the front end of the pump shaft 5, thereby ensuring the stability between the top cone 24 and the pump shaft 5, preventing the pump shaft 5 from rotating, and ultimately enabling the impeller 4, mechanical seal, or bearing to be removed from the pump shaft 5.

[0050] Example 3

[0051] Based on embodiments 1-2, this embodiment further improves the connection between the jack 21 and the manual pump 22:

[0052] The jack 21 is equipped with a quick-connect plug 25, and the hydraulic hose 23 is detachably connected to the quick-connect plug 25 (connected in the working state and detachable in the non-working state). This design ensures that the jack 21, hydraulic hose 23 and manual pump 22 are designed as separate units, making them more convenient to carry; and that assembly is quicker during use.

[0053] For jack 21, the RCH series from Shanghai Hugong Lifting Machinery Co., Ltd. can be selected; for manual pump 22, the CP series from Shanghai Hugong Lifting Machinery Co., Ltd. can be selected.

[0054] Example 4

[0055] Based on Examples 1-3, this example further improves the installation of hook I 31 and hook II 32:

[0056] Hook I 31 is secured to the mounting beam 11 by an adjustable fastener I 33 (e.g., screwed in or out), and hook II 32 is secured to the mounting beam 11 by an adjustable fastener II 34 (e.g., screwed in or out). Both fasteners I 33 and II 34 are bolts; they are used to secure hook I 31 and hook II 32 respectively, and the distance between hook I 31 and hook II 32 can be adjusted by adjusting fasteners I 33 and II 34; the bolts can be tightened by hand for added convenience.

[0057] like Figure 3 As shown, the outer side of the mounting beam 11 is provided with a groove 12 for limiting fasteners I 33 and II 34, such as... Figure 5 As shown, the end of hook I31 is provided with a threaded hole I313 for installing fastener I33, and the threaded hole I313 communicates with the through hole I311; as Figure 7 As shown, the end of hook II 32 is provided with a threaded hole II 323 for installing fastener II 34, and the threaded hole II 323 communicates with the through hole II 321. In one embodiment, when hook I 31, hook II 32 are assembled with mounting beam 11, threaded holes I 313 and II 323 are both located at the position of the slide groove 12 on mounting beam 11, and the fastening bolts in fastener I 33 and fastener II 34 are located exactly in the slide groove 12, which not only serves as a limit but also facilitates the tightening of the bolts, thereby fixing the distance between hook I 31 and hook II 32 to adapt to impellers, mechanical seals or bearings of specific sizes.

[0058] Example 5

[0059] Based on embodiments 1-4, this embodiment further defines card I 312 and card II 322 to further illustrate the technical solution.

[0060] Both clip I 312 and clip II 322 are L-shaped, which facilitates their attachment to the impeller 4, mechanical seal, or bearing, and also ensures a more stable fixation. Both clip I 312 and clip II 322 have an elastic element 35 on their inner side (e.g., Figure 6 , 8 As shown, it is used for cushioning and shock absorption, while also providing frictional resistance. The elastic element 35 is made of polyurethane, ethylene propylene rubber, fluororubber, or silicone rubber elastomer.

[0061] Example 6

[0062] Based on Examples 1-5, this example further improves the installation of jack 21:

[0063] like Figure 9 As shown, the lower side of the mounting beam 11 is provided with a mounting bracket 6 for fixing the jack 21. The mounting bracket 6 includes a mounting frame 61 for mounting the jack 21 body and a mounting cylinder 62 for mounting the jack cone 24. The mounting cylinder 62 and the mounting frame 61 are connected by threads. This arrangement allows for easy disassembly or replacement of the jack 21 body and the jack cone 24, while also ensuring that the linear drive assembly 2 can provide a stable driving force.

[0064] Example 7

[0065] Based on Examples 1-6, this example provides a quick disassembly method for centrifugal pump impeller 4, including the following steps:

[0066] 1. Positioning and fixing: The frame formed by the mounting beam 11, hook I 31 and hook II 32 is placed against the mounting surface of the centrifugal pump body. At the same time, the top cone 24 is adjusted to align with the pump shaft 5 at the center of the impeller 4.

[0067] 2. Adjust the distance between hook I 31 and hook II 32 according to the size of impeller 4, and, as follows: Figure 10 As shown, screw fastener I33 into threaded hole I313 and slide groove 12, and tighten fastener I33 to lock hook I31 in position, that is, fix hook I31 on mounting beam 11; similarly, screw fastener II34 into threaded hole II323 and slide groove 12, and tighten fastener II34 to lock hook II32 in position, that is, fix hook II32 on mounting beam 11, so that the distance between hook I31 and hook II32 is appropriate (so that the clamps I312 and clamps II322 located at their other ends can contact and clamp the edge of impeller 4 with the maximum contact area);

[0068] 3. Ejection and separation: Start the jack 21, connect the hydraulic pipe 23, operate the manual pump 22, so that the jack cone 24 advances at a constant speed, the jack cone 24 ejects the impeller 4 until the impeller 4 is completely separated from the pump shaft 5, the impeller 4 is separated from the pump shaft 5, and the disassembly of the impeller 4 is completed.

[0069] It should be noted that components with similar structures to impeller 4 that require tools to be pulled off the pump shaft 5, such as bearings and mechanical seals, can also be disassembled using the same method as impeller 4. Therefore, the disassembly method represented by impeller 4 is also applicable to the disassembly of mechanical seals, bearings, and other components of centrifugal pumps. Only the distance between hook I 31 and hook II 32 needs to be adjusted.

Claims

1. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing, characterized in that: It includes a linear drive assembly (2), a mounting assembly (1), and a movable hook assembly (3), wherein, The mounting component (1) includes the mounting beam (11); The linear drive assembly (2) includes a jack (21) and a manual pump (22). The manual pump (22) is connected to the jack (21) through a hydraulic pipe (23). After assembly, the jack cone (24) in the jack (21) extends toward the pump shaft (5) inside the centrifugal pump, and the jack cone (24) and the pump shaft (5) are arranged in the same direction. The movable hook assembly (3) includes hook I (31) and hook II (32). One end of hook I (31) is provided with a through hole I (311) for fitting onto the mounting beam (11), and the other end is provided with a clamp I (312) for fixing the impeller (4), mechanical seal or bearing. One end of hook II (32) is provided with a through hole II (321) for fitting onto the mounting beam (11), and the other end is provided with a clamp II (322) for fixing the impeller (4), mechanical seal or bearing. Hook I (31) and hook II (32) are respectively distributed on both sides of the jack (21).

2. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 1, characterized in that: The end face of the top cone (24) is matched with the front end of the pump shaft (5) inside the centrifugal pump.

3. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 2, characterized in that: The end face of the top cone (24) is a conical sawtooth surface that meshes with the front groove of the pump shaft (5).

4. The device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 1, characterized in that: The jack (21) is equipped with a quick-connect plug (25), and the hydraulic pipe (23) is connected to the quick-connect plug (25) in a detachable manner.

5. The device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 1, characterized in that: The hook I (31) is fixed to the mounting beam (11) by adjustable fastener I (33), and the hook II (32) is fixed to the mounting beam (11) by adjustable fastener II (34).

6. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 5, characterized in that: Both fastener I (33) and fastener II (34) are fastening bolts.

7. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 6, characterized in that: The outer side of the mounting beam (11) is provided with a groove (12) for limiting fastener I (33) and fastener II (34). The end of the hook I (31) is provided with a threaded hole I (313) for installing fastener I (33), and the threaded hole I (313) is connected to the through hole I (311); The end of the hook II (32) is provided with a threaded hole II (323) for installing fastener II (34), and the threaded hole II (323) is connected to the through hole II (321).

8. The device for quick disassembly of centrifugal pump impellers, mechanical seals, or bearings according to claim 1, characterized in that: Both card I (312) and card II (322) are L-shaped.

9. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 8, characterized in that: Both the inner sides of the card I (312) and the card II (322) are provided with elastic elements (35).

10. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to claim 9, characterized in that: The elastic element (35) is an elastic element made of polyurethane, ethylene propylene rubber, fluororubber or silicone rubber elastomer.

11. A device suitable for quick disassembly of a centrifugal pump impeller, mechanical seal or bearing according to any of claims 1-10, characterized in that: The mounting beam (11) is provided with a mounting bracket (6) for fixing the jack (21) on the lower side. The mounting bracket (6) includes a mounting frame (61) for mounting the body of the jack (21) and a mounting cylinder (62) for mounting the top cone (24), which is connected to the mounting frame (61) by threads.

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