Fan impeller dismounting tool

Abstract

The utility model belongs to the technical field of maintenance tools, and discloses a fan impeller dismounting tool which comprises a pulling device, a bolt, a connecting frame, a main lead screw and a connecting shaft. The rama device comprises a circular tube, and one end of the circular tube extends outwards in the radial direction to form an annular plate. N pairs of long circular through holes are formed in the circular ring plate; the long circular through holes are radially distributed around the center of the annular plate, and the two long circular through holes in the same pair are symmetrical about the center of the annular plate; the connecting shaft consists of a cylindrical section a and a cylindrical section b which are coaxial; the cylindrical section a is a threaded section; a two-section stepped hole is formed in the end, away from the cylindrical section a, of the cylindrical section b along the axis of the cylindrical section b, and the large-diameter section of the two-section stepped hole is away from the cylindrical section a. The connecting frame is detachably connected with the other end of the round pipe, a threaded through hole matched with the main lead screw is formed in the connecting frame, and the threaded through hole and the round pipe are coaxial. The utility model has the advantages of simple structure, high firmness and wide application range, and is convenient to disassemble, assemble and switch.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of overhaul tools, and relates to a fan impeller dismounting tool. BACKGROUND

[0002] The centrifugal fan is an important equipment in solid-phase tackifying production, and when the bearing of the bearing box of the centrifugal fan needs to be replaced, the impeller and the impeller shaft need to be separated by means of a dismounting device.

[0003] The patent application with the publication number CN111113332A provides a kind of impeller dismounting device, impeller dismounting method and impeller installation method, the impeller dismounting device includes pressing plate, fixed seat of detachable connection on pressing plate, mobile plate embedded in fixed seat, top cover plate, main screw rod and conversion screw rod (by main screw rod size conversion M16 or M20 screw rod, can satisfy the use of M16 and M20 two models), the side of fixed seat close to pressing plate is equipped with the accommodating groove of accommodating mobile plate, the groove depth of accommodating groove is greater than the thickness of mobile plate, the side of fixed seat away from pressing plate is equipped with the installation hole for connecting hollow hydraulic device (hollow hydraulic cylinder) communicated with accommodating groove, the inner diameter of installation hole is greater than the width of accommodating groove, first through-hole is equipped on mobile plate, second through-hole is equipped on pressing plate, the center axis of installation hole, first through-hole and second through-hole coincides;When the impeller dismounting device is used as dismounting device, one end of main screw rod is connected with the output end of hollow hydraulic device, the other end of main screw rod passes through first through-hole and second through-hole in sequence and abuts against the end portion of pump shaft, mobile plate is connected with main screw rod;When the impeller dismounting device is used as installation device, one end of conversion screw rod is connected with top cover plate, the other end of conversion screw rod passes through hollow hydraulic device internal through-hole, first through-hole and second through-hole in sequence and is connected with the end portion of pump shaft. However, the mechanism of the device is complex, and hydraulic device is also needed, which is high in cost, and inconvenient to switch between dismounting and mounting.

[0004] The patent with the authorization announcement number CN207807600U discloses a fan impeller dismounting tool, the dismounting tool comprises a crossbeam, a main jacking rod hole, a vice jacking rod hole and a pressure piece, the main jacking rod is in threaded connection with the crossbeam, the vice jacking rod is in clearance fit with the crossbeam, wherein, an axle hole is arranged at the end of a transmission shaft, an impeller hole is arranged on the impeller, the impeller hole and the axle hole are both threaded holes, when assembling the impeller, the axle hole is in threaded connection with the lower end of the vice jacking rod, when dismounting the impeller, the impeller hole is in threaded connection with the lower end of the vice jacking rod. However, it is found in actual use that the main stress points of the device in the impeller dismounting operation are the two vice jacking rods, the vice jacking rods are easily damaged and deformed when the pressure is large, the impeller dismounting process becomes unstable, the tool requires that two impeller holes are arranged on the impeller to cooperate with the two vice jacking rods, so that the tool can only dismount the impeller with a specific size positioning hole, the use range is limited, and in addition, when the tool needs to be used as an assembling tool, the tool needs to be dismounted and reassembled, which increases the operation complexity; in addition, the jacking rod of the tool directly abuts against the end surface of the impeller shaft, and the end surface of the impeller shaft is damaged in the dismounting process.

[0005] Therefore, it is of great significance to provide a fan impeller dismounting tool capable of solving the above problems. Content of the utility model

[0006] The utility model discloses a fan impeller dismounting tool.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] A fan impeller dismounting tool, the fan comprises an impeller shaft and an impeller, the impeller is provided with an overhaul positioning hole, the end surface of the impeller shaft is provided with a threaded hole, the fan impeller dismounting tool comprises a puller device, a bolt, a connecting frame, a main screw rod and a connecting shaft;

[0009] The puller device comprises a circular tube, one end of the circular tube extends radially outward to form a circular ring plate;

[0010] A plurality of pairs of long circular through holes are formed in the circular ring plate, and n>1; the plurality of pairs of long circular through holes are suitable for bolts with n different diameters; the long circular through holes are distributed radially around the center of the circular ring plate, and the two long circular through holes of the same pair are symmetrical about the center of the circular ring plate, so that different specifications of fan impellers can be dismounted, and the overhaul positioning holes on the fan impellers of different specifications are different in size and position;

[0011] The connecting shaft is composed of coaxial cylinder segment a and cylinder segment b; the cylinder segment a is a threaded segment for connecting the threaded hole of the impeller shaft end face; the end of the cylinder segment b away from the cylinder segment a is provided with a two-section stepped hole along the axis thereof, the large-diameter section of the two-section stepped hole is away from the cylinder segment a, and the diameter of the main screw rod is between the diameters of the small-diameter section and the large-diameter section; the outer diameter of the cylinder segment b is smaller than the diameter of the impeller shaft;

[0012] The connecting frame is detachably fixed on the other end of the circular pipe, the connecting frame is provided with a threaded through hole matched with the main screw rod, and the threaded through hole is coaxial with the circular pipe, so that the position of the impeller shaft can be observed through the tail of the LAMA device during operation;

[0013] During use, the LAMA device and the connecting frame are integrally stressed, so that the components are prevented from being damaged and deformed, and the stability is improved.

[0014] As a preferred technical scheme:

[0015] The fan impeller dismounting tool as described above, the threaded hole a and the threaded hole b are provided with the bolt a and the bolt b respectively;

[0016] The connecting frame is a “” shaped frame composed of the horizontal part a, the vertical part and the horizontal part b;

[0017] The horizontal part a is detachably fixedly connected with the circular pipe through the bolt a and the threaded hole a, and the horizontal part b is detachably fixedly connected with the circular pipe through the bolt b and the threaded hole b;

[0018] The threaded through hole is arranged on the vertical part.

[0019] The fan impeller dismounting tool as described above, the outer wall of the circular pipe is fixedly connected with two handles, so that the rotation of the impeller during dismounting is prevented, and unnecessary risks caused by the instantaneous falling of the impeller from the impeller shaft are also prevented.

[0020] The fan impeller dismounting tool as described above, the fan impeller dismounting tool further comprises a secondary screw rod and an external hexagonal nut;

[0021] The inner wall of the small-diameter section of the two-section stepped hole is provided with a thread matched with the secondary screw rod;

[0022] The external hexagonal nut is located at the end of the secondary screw rod away from the small-diameter section, and the diameter of the circumscribed circle of the cross section of the external hexagonal nut is greater than the diameter of the threaded through hole;

[0023] The diameter of the secondary screw rod satisfies that when the secondary screw rod is located in the threaded through hole and moves along the axis of the threaded through hole, the secondary screw rod does not contact the threaded through hole.

[0024] The fan impeller dismounting tool as described above, the thickness of the circular ring plate is 20-22 mm, and the outer diameter of the circular ring plate is 50-60 mm greater than the inner diameter.

[0025] The hole depth of the small diameter section is 10-15mm, the hole depth of the large diameter section is 5-6mm, and the length of the cylindrical section b is 30-35mm.

[0026] Beneficial effects:

[0027] (1) When the tool is used to separate and assemble the impeller and the impeller shaft, only the main lead screw or the auxiliary lead screw needs to be replaced, and the tool is convenient to use; moreover, the LAMA device is provided with a handle, which can not only prevent the impeller from rotating during the disassembling process, but also avoid unnecessary risks caused by the instantaneous drop of the impeller from the impeller shaft; the connecting shaft is used during the disassembling process, and the end face of the impeller shaft can be prevented from being damaged.

[0028] (2) The device can disassemble and assemble impellers with different sizes and distances of the positioning holes, and has a wide application range.

[0029] (3) The device has simple structure, low cost and convenient installation, and is convenient to switch between the disassembling and assembling of the impeller (only the main lead screw or the auxiliary lead screw needs to be replaced), and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a front view structural schematic diagram of the connecting frame of the utility model;

[0031] Figure 2 It is a right view structural schematic diagram of the connecting frame of the utility model;

[0032] Figure 3 It is a structural schematic diagram of the ring plate of the LAMA device of the utility model;

[0033] Figure 4 It is a sectional view structural schematic diagram of the connecting shaft of the utility model;

[0034] Figure 5 It is a schematic diagram of disassembling the impeller of the fan by using the utility model;

[0035] Figure 6 It is a schematic diagram of assembling the impeller of the fan by using the utility model;

[0036] Wherein, 1-impeller, 2-impeller shaft, 3-connecting shaft, 4-bolt, 5-LAMA device, 6-connecting frame, 7-bolt a, 8-main lead screw, 9-auxiliary lead screw, 10-large diameter section, 11-small diameter section, 12-handle, 13-long circular through hole, 14-threaded hole. DETAILED DESCRIPTION

[0037] With reference to the specific embodiments, the utility model is further described. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, the person skilled in the art can make various alterations or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0038] A fan impeller dismounting tool, the fan includes an impeller shaft 2 and an impeller 1, the impeller 1 is provided with an overhaul positioning hole, and the end face of the impeller shaft 2 is provided with a threaded hole, as shown in Figures 1-6 The fan impeller dismounting tool includes a puller device 5, a bolt 4, a connecting frame 6, a main lead screw 8, a connecting shaft 3, an auxiliary lead screw 9 and an outer hexagonal nut.

[0039] The puller device 5 includes a circular tube, and the one end of the circular tube extends radially outward to form a circular plate; the thickness of the circular plate is 20-22mm, and the outer diameter of the circular plate is 50-60mm larger than the inner diameter;

[0040] As shown in Figure 3 , n pairs of long circular through holes 13 are formed on the circular plate, and n>1;

[0041] The n pairs of long circular through holes 13 are respectively suitable for n kinds of bolts 4 with different diameters; each long circular through hole 13 is distributed radially around the center of the circular plate, and the two long circular through holes 13 of the same pair are symmetric about the center of the circular plate;

[0042] Threaded hole a and threaded hole b are formed on the other end of the circular tube, and bolt a 7 and bolt b are respectively arranged in threaded hole a and threaded hole b;

[0043] As shown in Figure 1 , the connecting frame 6 is a “” shaped frame composed of horizontal part a, vertical part and horizontal part b;

[0044] As shown in Figure 5 , the horizontal part a is detachably fixedly connected with the circular tube through bolt a 7 and threaded hole a, and the horizontal part b is detachably fixedly connected with the circular tube through bolt b and threaded hole b;

[0045] As shown in Figure 1 , Figure 2 , Figure 5 , the vertical part is provided with a threaded through hole 14 matched with the main lead screw 8, and the threaded through hole 14 is coaxial with the circular tube;

[0046] Two handles 12 are fixedly connected on the outer wall of the circular tube;

[0047] As shown in Figure 4As shown, the connecting shaft 3 consists of coaxial cylindrical sections a and b; cylindrical section a is a threaded section used to connect to the threaded hole on the end face of the impeller shaft; cylindrical section b has a two-stage stepped hole along its axis at the end opposite to cylindrical section a, the larger diameter section 10 of the two-stage stepped hole is far away from cylindrical section a, and the diameter of the main screw 8 is between the diameter of the smaller diameter section 11 and the diameter of the larger diameter section 10; the outer diameter of cylindrical section b is smaller than the diameter of the impeller shaft 2.

[0048] The hole depth of the small diameter section 11 is 10-15mm, the hole depth of the large diameter section 10 is 5-6mm, and the length of the cylindrical section b is 30-35mm.

[0049] The inner wall of the smaller diameter section 11 of the two stepped holes is provided with threads that are compatible with the auxiliary lead screw 9;

[0050] like Figure 6 As shown, the external hexagonal nut is located at the end of the auxiliary lead screw 9 away from the small diameter section 11, and the outer circle diameter of the cross-section of the external hexagonal nut is larger than the diameter of the threaded through hole 14;

[0051] The diameter of the auxiliary lead screw 9 satisfies the following condition: when the auxiliary lead screw 9 is located inside the threaded through hole 14 and moves along the axis of the threaded through hole 14, the auxiliary lead screw 9 does not contact the threaded through hole 14.

[0052] The process of using the above device is as follows: Figure 5 As shown, when disassembling the impeller 1 of the fan using the above-mentioned device, first connect the cylindrical section a of the connecting shaft 3 to the threaded hole on the end face of the impeller shaft 2, then connect the puller device 5 to the fixing hole on the impeller 1 through bolt 4, connect the connecting frame 6 to the threaded hole a and threaded hole b through bolts a 7 and b respectively, then screw the main screw 8 into the threaded through hole 14 on the vertical part and insert the end into the large diameter section 10 of the connecting shaft 3 until it touches the bottom, and finally rotate the main screw 8 (while holding the handle 12 on the outer wall of the round tube to prevent the impeller 1 from rotating). Under the feeding force applied by the main screw 8, the impeller 1 is removed from the impeller shaft 2; at the same time, the movement of the impeller 1 can be observed through the tail of the puller device 5 during the rotation of the main screw 8.

[0053] like Figure 6 As shown, when it is necessary to assemble the impeller shaft 2 with the impeller 1, simply remove the main lead screw 8, pass the auxiliary lead screw 9 through the threaded through hole 14 on the vertical part and the large diameter section 10 of the two stepped holes on the connecting shaft 3 in sequence, and then thread it with the small diameter section 11 of the two stepped holes. Then, turn the external hexagonal nut on the auxiliary lead screw 9 with a wrench until the impeller 1 is slowly pressed into the impeller shaft 2, thus completing the assembly of the impeller shaft 2 and the impeller 1.

Claims

1. A tool for disassembling a fan impeller, the fan comprising an impeller shaft (2) and an impeller (1), the impeller (1) having a maintenance positioning hole, and the end face of the impeller shaft (2) having a threaded hole, characterized in that, The fan impeller dismounting tool comprises a puller (5), a bolt (4), a connecting frame (6), a main lead screw (8) and a connecting shaft (3); The puller (5) comprises a circular tube, one end of the circular tube extends radially outward to form a circular plate; The circular plate is provided with n pairs of long circular through holes (13), n>1; the n pairs of long circular through holes (13) are respectively suitable for n kinds of bolts (4) with different diameters; each long circular through hole (13) is distributed radially around the center of the circular plate, and the two long circular through holes (13) of the same pair are symmetric about the center of the circular plate; The connecting shaft (3) is composed of coaxial cylindrical segment a and cylindrical segment b; the cylindrical segment a is a threaded segment, used for connecting the threaded hole in the end face of the impeller shaft (2); the end of the cylindrical segment b away from the cylindrical segment a is provided with a two-segment stepped hole along the axis thereof, the large-diameter segment (10) of the two-segment stepped hole is away from the cylindrical segment a, and the diameter of the main lead screw (8) is between the diameters of the small-diameter segment (11) and the large-diameter segment (10); the outer diameter of the cylindrical segment b is smaller than the diameter of the impeller shaft (2); The connecting frame (6) is detachably fixed on the other end of the circular tube, and the connecting frame (6) is provided with a threaded through hole (14) adapted to the main lead screw (8), and the threaded through hole (14) is coaxial with the circular tube.

2. A fan impeller dismounting tool according to claim 1, characterized in that The circular tube is provided with a threaded hole a and a threaded hole b, and the threaded hole a and the threaded hole b are respectively provided with a bolt a (7) and a bolt b; The connecting frame (6) is a " " shaped frame composed of a horizontal part a, a vertical part and a horizontal part b; The horizontal part a is detachably connected with the circular tube through the bolt a (7) and the threaded hole a, and the horizontal part b is detachably connected with the circular tube through the bolt b and the threaded hole b; The threaded through hole (14) is formed in the vertical part.

3. A fan impeller dismounting tool according to claim 1, characterized in that Two handles (12) are fixedly connected to the outer wall of the circular tube.

4. The fan impeller dismounting tool according to claim 1, characterized in that, The fan impeller dismounting tool further comprises a secondary lead screw (9) and an outer hexagonal nut; The inner wall of the small-diameter segment (11) of the two-segment stepped hole is provided with a thread adapted to the secondary lead screw (9); The outer hexagonal nut is located at the end of the secondary lead screw (9) away from the small-diameter segment (11), and the diameter of the circumscribed circle of the cross section of the outer hexagonal nut is greater than the diameter of the threaded through hole (14); The diameter of the secondary lead screw (9) satisfies that when the secondary lead screw (9) is located in the threaded through hole (14) and moves along the axis of the threaded through hole (14), the secondary lead screw (9) does not contact the threaded through hole (14).

5. The fan impeller dismounting tool according to claim 1, characterized in that, The thickness of the circular plate is 20-22 mm, and the outer diameter of the circular plate is 50-60 mm larger than the inner diameter.

6. A fan impeller dismounting tool according to claim 1, characterized in that The hole depth of the small-diameter segment (11) is 10-15 mm, the hole depth of the large-diameter segment (10) is 5-6 mm, and the length of the cylindrical segment b is 30-35 mm.

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