Impeller dismounting device

Abstract

The utility model relates to the technical field of equipment maintenance, in particular to an impeller dismounting device which is used for mounting and dismounting an impeller and a main shaft and comprises a connecting ring and an oil cylinder, one end of the connecting ring is detachably connected to the impeller, the other end of the connecting ring is detachably connected to the oil cylinder, and the oil cylinder comprises a cylinder body, a piston rod and a piston. Each of the cylinder body and the piston rod is a barrel with one open end and the other closed end, the open ends of the cylinder body and the piston rod face opposite directions, a cylinder is arranged in the center of the closed end of the cylinder body, a containing cavity is formed between the outer side of the cylinder and the cylinder body, and the open end of the piston rod extends into the containing cavity and sleeves the cylinder; the piston is located in the containing cavity and fixedly connected to one end of the piston rod. A lead screw penetrates through the center of the cylinder, the left end of the lead screw penetrates through the closed end of the cylinder body and then is connected with the main shaft, and the right end of the lead screw penetrates through the closed end of the piston rod and then is sleeved with a locking nut. The impeller is pulled out or pushed into the main shaft through the cylinder body, so that the impeller is prevented from being heated or knocked.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of equipment maintenance, and particularly relates to a impeller dismounting device. BACKGROUND

[0002] In the field of sewage treatment, the submersible centrifugal pump is one of important equipment for sewage delivery and lifting, and its working principle is to use centrifugal force generated when the motor drives the impeller to rotate to deliver and lift sewage.

[0003] The routine maintenance of the submersible centrifugal pump includes oil change, impeller dismounting and inspection, etc. Among them, the impeller and the main shaft adopt interference fit, and it is difficult to dismount the impeller under normal circumstances, and there is no special tool for corresponding inspection and maintenance operation, so that the maintenance of the submersible centrifugal pump takes a long time and requires a large number of personnel. When dismounting the impeller of the submersible centrifugal pump on site, oxyacetylene flame is often used to directly heat the impeller to make it expand, and when the impeller is mounted, the impeller needs to be knocked, so that the dismounting method not only easily causes damage to the impeller and the main shaft, but also increases the harmful factors and risk coefficient of on-site operation. SUMMARY

[0004] In order to solve the problem that the impeller needs to be heated by open flame when dismounting the impeller of the submersible centrifugal pump on site, and the impeller needs to be knocked when the impeller is mounted, the utility model provides an impeller dismounting device, which connects the hub disc of the impeller with the cylinder body through the connecting ring, and then pulls out or pushes into the impeller on the main shaft through the cylinder body, so as to dismount the impeller from the main shaft or assemble the impeller on the main shaft, thereby avoiding heating or knocking the impeller.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] The utility model provides a kind of impeller disassembler, for the installation and disassembly of impeller and main shaft, including connecting ring and oil cylinder, one end of the connecting ring is detachably connected to impeller, the other end of connecting ring is detachably connected to oil cylinder, the oil cylinder includes cylinder body, piston rod and piston, the cylinder body and piston rod are both open one end, the other end is closed barrel, and the open end of both is opposite, the closed end of cylinder body is provided with cylinder in the center, the outside of the cylinder forms containing cavity with cylinder body, the open end of the piston rod extends into the containing cavity and is sleeved on the cylinder;The piston is located in containing cavity, and the piston is fixedly connected at one end of piston rod, and hydraulic oil is injected into containing cavity to exert thrust on piston, to drive piston rod to move in turn;The center of the cylinder is provided with screw rod, the left end of the screw rod passes through the closed end of the cylinder body and is connected with the main shaft, and the right end of the screw rod passes through the closed end of the piston rod and is sleeved with locking nut.The cylinder is connected with the impeller through the connecting ring, and then the impeller is pulled out or pushed into the main shaft through the cylinder, so that the impeller is disassembled from the main shaft or assembled on the main shaft, avoiding heating or knocking the impeller.

[0007] Further, the impeller includes a hub disc and a plurality of blades distributed on the hub disc, the main shaft is clamped in the interior of the hub disc, the hub disc protrudes right from the right end surface of the main shaft to form a protruding portion, and the protruding portion of the hub disc is threadedly connected with the connecting ring.

[0008] Further, the hub disc is a cylindrical structure extending along the main shaft, the inner wall of the protruding portion of the hub disc is provided with internal thread one, and the left half of the outer wall of the connecting ring is provided with external thread one matched with the internal thread one.

[0009] Further, the right half of the inner wall of the connecting ring is provided with internal thread two, and the connecting ring is threadedly connected with the left flange plate or the right flange plate through the internal thread two.

[0010] Further, the left and right ends of the cylinder body are fixedly connected with the left flange plate and the right flange plate respectively, the left half of the outer wall of the left flange plate is provided with external thread two matched with the internal thread two, and the right half of the outer wall of the right flange plate is provided with external thread three matched with the internal thread two.

[0011] Further, the right end surface of the main shaft is provided with threaded hole matched with the screw rod in the center.

[0012] Further, the closed end of the piston rod extends out of the cylinder body, the closed end of the piston rod and the center of the cylinder are jointly provided with through hole penetrating through, and the diameter of the through hole is greater than the outer diameter of the screw rod.

[0013] Further, the lock nuts are provided in two and arranged side by side on the screw rod.

[0014] Through the technical scheme, the utility model discious the following beneficial effects:

[0015] The cylinder body is connected with the hub disc of the impeller through the connecting ring, and the left end of the screw rod is threadedly connected with the main shaft, and when assembling, chamber one of the accommodating cavity is filled with oil, the piston moves from chamber one to chamber two, the piston rod is pushed out to the right side, the left end of the screw rod is fixed to the main shaft, and the right end of the piston rod is limited by the lock nut, therefore, the end face of the piston rod is fixed after abutting to the end face of the lock nut, the cylinder body is subjected to the force of the hydraulic oil, moves to the left relative to the piston rod, and further drives the hub disc to continuously move to the left side until the impeller is pushed into the main shaft and assembled in place, and the assembly of the impeller is completed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of the utility model discious a kind of impeller disassembler, and in the drawing, impeller and main shaft are in assembly state;

[0017] Figure 2 It is a sectional view of the utility model discious a kind of impeller disassembler;

[0018] Figure 3 It is a sectional view of main shaft, hub disc and connecting ring in the utility model discious a kind of impeller disassembler;

[0019] Figure 4 It is a sectional view of oil cylinder in the utility model discious a kind of impeller disassembler;

[0020] Figure 5 It is a schematic view of impeller and main shaft in the utility model discious a kind of impeller disassembler in disassembly state.

[0021] Reference numerals in the drawing are:

[0022] 1, main shaft; 2, hub disc; 3, connecting ring; 4, cylinder; 5, piston rod; 6, cylinder; 7, containing cavity; 8, screw rod; 9, locking nut; 10, internal thread one; 11, external thread one; 12, internal thread two; 13, left flange; 14, right flange; 15, external thread two; 16, external thread three; 17, threaded hole; 18, piston; 19, through hole. DETAILED DESCRIPTION

[0023] The utility model will be further described in connection with the drawings and specific embodiments:

[0024] As Figures 1-5 shown, the embodiment provides a kind of impeller disassembler, for the installation and disassembly of impeller and main shaft 1, including connecting ring 3 and oil cylinder, one end of the connecting ring 3 is detachably connected to impeller, the other end of connecting ring 3 is detachably connected to oil cylinder, the oil cylinder includes cylinder 4, piston rod 5 and piston 18, the cylinder 4 and piston rod 5 are both open-end cylinder, and the open end of the two is opposite, the closed end of cylinder 4 is provided with cylinder 6 in the center, the containing cavity 7 is formed between the outside of cylinder 6 and cylinder 4, and the open end of piston rod 5 extends into the containing cavity 7 and is sleeved on cylinder 6;The piston 18 is located in containing cavity 7, and the piston 18 is fixedly connected to one end of piston rod 5, when hydraulic oil is injected into containing cavity 7, push force is applied to piston 18, and then piston rod 5 is driven to move;The cylinder 6 is provided with screw rod 8 in the center, and the left end of screw rod 8 is connected with main shaft 1 after passing through the closed end of cylinder 4, and locking nut 9 is sleeved on the right end of screw rod 8 after passing through the closed end of piston rod 5.

[0025] It should be noted that, the piston 18 divides containing cavity 7 into two parts, which are chamber one between piston 18 and the closed end of cylinder 4 and chamber two between the open end of cylinder 4 and piston 18, chamber one is filled with oil, and piston 18 moves from chamber one to chamber two, and then drives piston rod 5 to move. After the disassembler completes disassembly or assembly work, open the pressure relief valve, complete oil cylinder pressure relief and piston rod 5 retraction.

[0026] Through the above setting structure, the cylinder body 4 is connected with the impeller through the connecting ring 3, and the left end of the screw rod 8 is threadedly connected with the main shaft 1. When assembling, the chamber one of the accommodating cavity 7 is filled with oil, the piston 18 moves from the chamber one to the chamber two, that is, the piston rod 5 is pushed out to the right side. Since the left end of the screw rod 8 is fixed to the main shaft 1, the right end of the piston rod 5 is limited by the locking nut 9. Therefore, after the end surface of the piston rod 5 abuts against the end surface of the locking nut 9, the piston rod 5 is fixed and cannot move. The cylinder body 4 moves to the left relative to the piston rod 5 under the action of the hydraulic oil, and further drives the wheel hub disc 2 to continuously move to the left, until the impeller is pushed into the main shaft 1 and is assembled in place, and the assembly of the impeller is completed. When disassembling, the chamber one of the accommodating cavity 7 is filled with oil, the piston 18 moves from the chamber one to the chamber two. Since the oil cylinder is turned by 180°, the piston rod 5 is pushed out to the left side, until the end surface of the piston rod 5 abuts against the end surface of the main shaft 1 and is fixed and cannot move. Then, the cylinder body 4 moves to the right relative to the piston rod 5 under the action of the hydraulic oil, and further drives the impeller to continuously move to the right through the connecting ring 3, until the impeller is pulled out of the main shaft 1, and the disassembly of the impeller is completed.

[0027] Further, the impeller comprises the wheel hub disc 2 and a plurality of blades distributed on the wheel hub disc 2, and the main shaft 1 is clamped in the inside of the wheel hub disc 2. The wheel hub disc 2 protrudes from the right end surface of the main shaft 1 to form a protruding portion, and the protruding portion of the wheel hub disc 2 is threadedly connected with the connecting ring 3.

[0028] Specifically, referring again to Figure 3 , the wheel hub disc 2 is a cylindrical structure extending along the main shaft 1. An inner thread one 10 is formed in the inner wall of the protruding portion of the wheel hub disc 2. An outer thread one 11 is formed in the left half of the outer wall of the connecting ring 3 and matches the inner thread one 10. The connecting ring 3 is threadedly connected with the wheel hub disc 2 through the inner thread one 10 and the outer thread one 11.

[0029] In this embodiment, an inner thread two 12 is formed in the right half of the inner wall of the connecting ring 3. The connecting ring 3 is threadedly connected with the left flange plate 13 or the right flange plate 14 on the cylinder body 4 through the inner thread two 12.

[0030] Referring again to Figure 4 , the left and right ends of the cylinder body 4 are respectively fixedly connected with the left flange plate 13 and the right flange plate 14. An outer thread two 15 is formed in the left half of the outer wall of the left flange plate 13 and matches the inner thread two 12. An outer thread three 16 is formed in the right half of the outer wall of the right flange plate 14 and matches the inner thread two 12. When assembling, the left flange plate 13 on the cylinder body 4 is threadedly connected with the connecting ring 3 through the inner thread two 12 and the outer thread two 15. When disassembling, the cylinder body 4 is turned by 180°, and the right flange plate 14 on the cylinder body 4 is threadedly connected with the connecting ring 3 through the inner thread two 12 and the outer thread three 16.

[0031] In this embodiment, the right end face of the main shaft 1 is provided with a threaded hole 17 matched with the screw rod 8.

[0032] Further, the closed end of the piston rod 5 extends out of the cylinder body 4, and the closed end of the piston rod 5 and the center of the cylinder 6 are jointly provided with a through hole 19, the diameter of the through hole 19 is greater than the outer diameter of the screw rod 8.

[0033] In addition, the locking nuts 9 are provided in two and arranged side by side on the screw rod 8.

[0034] It is worth mentioning that, because the main shaft 1 is fixedly connected with the centrifugal pump body, no matter the assembly or disassembly process of the impeller, the main shaft 1 is fixedly connected with the centrifugal pump body.

[0035] The working principle of the utility model is:

[0036] The assembly process of the impeller is as follows: please refer to Figure 2 The impeller is hoisted and aligned with the main shaft 1, then the external thread one 11 on the connecting ring 3 is screwed into the internal thread one 10 on the hub disc 2, then the external thread two 15 on the left flange plate 13 on the cylinder body 4 is screwed into the internal thread two 12 of the connecting ring 3, then the screw rod 8 is passed through the through hole 19, the left end of the screw rod 8 is screwed into the threaded hole 17 on the main shaft 1, finally the two locking nuts 9 are screwed into the screw rod 8 in sequence, tightly close to the right end of the piston rod 5 and lock; the chamber one of the accommodating cavity 7 is filled with oil, the piston 18 moves from the chamber one to the chamber two, that is, the piston rod 5 moves to the right, because the left end of the screw rod 8 is fixed on the main shaft 1, the right end of the piston rod 5 is limited by the locking nuts 9, therefore, the piston rod 5 is fixedly connected after the end face of the piston rod 5 abuts against the end face of the locking nut 9, the cylinder body 4 is moved to the left relative to the piston rod 5 under the action of the hydraulic oil, and further drives the hub disc 2 to continuously move to the left, until the impeller is pushed into the main shaft 1 and assembled in place, the assembly of the impeller is completed.

[0037] The disassembly process of the impeller is as follows: please refer to Figure 5, take down the screw rod 8 and then carry out the disassembly work, when disassembling the impeller, the oil cylinder needs to be adjusted by 180°. Specifically, first, the external thread one 11 on the connecting ring 3 is screwed into the internal thread one 10 on the hub disc 2, and then the external thread three 16 on the right flange plate 14 on the cylinder body 4 is screwed into the internal thread two 12 of the connecting ring 3; the chamber one of the containing cavity 7 is filled with oil, the piston 18 moves from the chamber one to the chamber two, because the oil cylinder is adjusted by 180°, the piston rod 5 is pushed out to the left side, until the end face of the piston rod 5 abuts against the end face of the main shaft 1 and is fixed, then the cylinder body 4 is subjected to the action force of the hydraulic oil, moves to the right relative to the piston rod 5, and then drives the impeller to continuously move to the right through the connecting ring 3, until the impeller is pulled out of the main shaft 1, the disassembly work of the impeller is completed.

[0038] The above-mentioned embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Any equivalent changes or modifications made in accordance with the structure, features and principles of the present application should be included in the scope of the present application.

Claims

1. An impeller disassembler for mounting and dismounting of an impeller and a main shaft (1), characterized in that, The utility model provides a connecting ring (3) and oil cylinder, one end of connecting ring (3) is detachably connected to impeller, the other end of connecting ring (3) is detachably connected to oil cylinder, the oil cylinder includes cylinder body (4), piston rod (5) and piston (18), cylinder body (4) and piston rod (5) are both open one end, the other end is closed cylinder and the open end of both is opposite, the closed end center of cylinder body (4) is provided with cylinder (6), the outside between cylinder (6) and cylinder body (4) forms containing cavity (7), the open end of piston rod (5) is in containing cavity (7) and is sleeved on cylinder (6);Piston (18) is located in containing cavity (7), and piston (18) is fixedly connected at one end of piston rod (5);The center of cylinder (6) is provided with lead screw (8), the left end of lead screw (8) is connected with main shaft (1) after passing through the closed end of cylinder body (4), and the right end of lead screw (8) is sleeved with locking nut (9) after passing through the closed end of piston rod (5).

2. A blade extractor according to claim 1, wherein The impeller includes a hub disc (2) and a plurality of blades distributed on the hub disc (2), the main shaft (1) is clamped in the inside of the hub disc (2), the hub disc (2) protrudes from the right end surface of the main shaft (1) to form a protruding part, and the protruding part of the hub disc (2) is threadedly connected with the connecting ring (3).

3. A blade extractor as claimed in claim 2, wherein The hub disc (2) is a cylindrical structure extending along the main shaft (1), and an inner thread (10) is formed on the inner wall of the protruding part of the hub disc (2), and an outer thread (11) is formed on the left half of the outer wall of the connecting ring (3).

4. A turbine wheel remover according to claim 1, wherein An inner thread (12) is formed on the right half of the inner wall of the connecting ring (3).

5. An impeller assembly / disassembly device according to claim 4, characterized in that, The left flange plate (13) and the right flange plate (14) are fixedly connected to the left and right ends of the cylinder body (4) respectively, an outer thread (15) is formed on the left half of the outer wall of the left flange plate (13) and matches with the inner thread (12), and an outer thread (16) is formed on the right half of the outer wall of the right flange plate (14) and matches with the inner thread (12).

6. A turbine wheel remover according to claim 1, wherein A threaded hole (17) is formed at the center of the right end surface of the main shaft (1) and matches with the lead screw (8).

7. A turbine wheel remover according to claim 1 wherein, The closed end of the piston rod (5) protrudes from the cylinder body (4), a through hole (19) is formed at the center of the closed end of the piston rod (5) and the center of the cylinder (6), and the diameter of the through hole (19) is greater than the outer diameter of the lead screw (8).

8. A turbine wheel remover according to claim 1, wherein, The locking nuts (9) are arranged in parallel on the lead screw (8).

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