Double-layer shaft sleeve electric heating expansion device

Abstract

The utility model discloses a double-layer shaft sleeve electric heating expansion device which comprises a fixing barrel and a mounting frame, handles are arranged on the periphery of the fixing barrel, heating pipes are evenly distributed on the fixing barrel, a sealing upper cover is arranged at the upper end of the fixing barrel, a sealing bottom cover is arranged at the lower end of the fixing barrel, and a wire fixing assembly is arranged on the mounting frame and used for fixing heating pipe circuits. And a hoisting hole is formed in the top of the mounting frame. The double-layer shaft sleeve is reasonable in structural design, the inner-layer shaft sleeve is evenly heated through circumferential matching of the heating pipe and the shaft sleeve so that the inner-layer shaft sleeve can be expanded, meanwhile, the ceramic heating pieces are additionally arranged on the outer side of the shaft sleeve, manpower and material resources are saved, production cost is reduced, and working efficiency of double-layer shaft sleeve installation is improved. The device can adapt to the shaft sleeve with the diameter change within a certain range and is high in universality.

Description

TECHNICAL FIELD

[0001] The utility model relates to axle sleeve heating technical field especially relates to double -deck axle sleeve electric heating expansion device. BACKGROUND

[0002] In prior art, the dismounting of double -deck axle sleeve is mostly through the mode of soft hammer knocking or flame heating, the working efficiency is low through the mode of hammering, and the axle sleeve or axle is also easy to be damaged, when the axle sleeve is heated by flame, the staff needs to uniformly heat the axle sleeve, in the process of heating, the staff needs to constantly rotate the flame sprayer, needs to spend long time, and the heating is not uniform enough, which is easy to affect the dismounting of the axle sleeve. SUMMARY

[0003] The utility model aims at solving the above technical problem, provides double -deck axle sleeve electric heating expansion device.

[0004] In order to realize the above technical purpose, reach the technical requirement of above, the utility model adopts the technical scheme of double -deck axle sleeve electric heating expansion device, including fixed barrel, mounting bracket, the fixed barrel periphery is provided with handle, and the heating pipe is uniformly distributed on the fixed barrel, the fixed barrel upper end is provided with sealing upper cover, and the lower end is provided with sealing bottom cover, the mounting bracket is provided with wire fixing assembly, is used for fixing the heating pipe line, the mounting bracket top is provided with hoisting hole.

[0005] Preferably, the heating pipe is circumferentially matched with the double -deck axle sleeve, and the inner layer axle sleeve is uniformly heated, and the double -deck axle sleeve outside is provided with ceramic heating sheet.

[0006] Preferably, the wire fixing assembly includes a wire fixing disc, and a plurality of wire fixing loops are uniformly arranged on the wire fixing disc.

[0007] Compared with the traditional structure, the utility model has the beneficial effects that the structure design is reasonable, the inner layer axle sleeve is uniformly heated through the circumferential matching of the heating pipe and the axle sleeve, the inner layer axle sleeve is expanded, ceramic heating sheet is added to the outside of the axle sleeve, manpower and material resources are saved, production cost is reduced, the working efficiency of double -deck axle sleeve installation is improved, the problem of low working efficiency of the dismounting of the current double -deck axle sleeve is solved, the axle sleeve can adapt to the diameter change within a certain range, and the universality is strong. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 It is the structure schematic diagram of the utility model;

[0009] Fig. 2 It is the cooperation schematic diagram of the utility model and double -deck axle sleeve;

[0010] In the figure: 1. hoisting hole, 2. wire fixing ring, 3. sealing upper cover, 4. handle, 5. sealing bottom cover, 6. fixed barrel, 7. heating pipe, 8. mounting frame, 9. wire fixing disc, 10. double-layer shaft sleeve, 11. ceramic heating sheet. DETAILED DESCRIPTION

[0011] The utility model will be further explained below.

[0012] Refer to the accompanying drawings Figs. 1-2 The double-layer shaft sleeve electric heating expansion device comprises a fixed barrel 6 and a mounting frame 8. The fixed barrel 6 is provided with a handle 4 around. The heating pipes 7 are uniformly arranged on the fixed barrel 6. The fixed barrel 6 is provided with a sealing upper cover 3 at the upper end and a sealing bottom cover 5 at the lower end. The mounting frame 8 is provided with a wire fixing assembly for fixing the heating pipe 7 circuit. The mounting frame 8 is provided with a hoisting hole 1 at the top, which is convenient for the crane to hoist.

[0013] In the preferred embodiment, the heating pipe 7 is circumferentially matched with the double-layer shaft sleeve 10 to uniformly heat the inner layer shaft sleeve. The double-layer shaft sleeve 10 is provided with a ceramic heating sheet 11 on the outside.

[0014] In the preferred embodiment, the wire fixing assembly comprises a wire fixing disc 9, and a plurality of wire fixing rings 2 are uniformly arranged on the wire fixing disc 9.

[0015] In the specific implementation, the heating pipe 7 is circumferentially matched with the double-layer shaft sleeve 10, and the heating pipe 7 generates heat to uniformly heat the inner layer shaft sleeve, so that the inner layer shaft sleeve expands. The temperature is measured at regular intervals during the heating process (once every 10 minutes). At the same time, the ceramic heating sheet 11 is added to the outside of the double-layer shaft sleeve 10, and the sealing upper cover 3 and the sealing bottom cover 5 are installed. The inside of the double-layer shaft sleeve 10 is kept warm through the sealing. After heating to a certain temperature, the heating is stopped, and the shaft sleeve inner diameter size is measured by using a caliper. After the interference requirement is met, the heating device is hoisted by the travelling crane, and the shaft sleeve is pushed into the shaft to the interference joint mark by using the previously prepared clamp. Finally, the installation of the shaft sleeve is realized. The device can effectively improve the work efficiency, and has strong universality and can adapt to the shaft sleeve with a diameter change within a certain range.

[0016] Example calculation explanation:

[0017] Test piece material: Q355B

[0018] Material thermal expansion coefficient:

[0019] Wire expansion coefficient: 12*10 -6 / ℃

[0020] Table expansion coefficient: 35*10 -6 / ℃

[0021] Body expansion coefficient: 35*10 -6 / ℃

[0022] Room temperature: 20℃

[0023] Theoretical calculation:

[0024] Linear deformation:

[0025] Linear deformation area increment:

[0026] Initial area:

[0027] Table deformation area increment:

[0028] 220℃ thermal expansion after the inner hole size:

[0029] Theoretical calculation conclusion: when the whole temperature of the workpiece reaches 220℃, the expansion is about 4mm.

[0030] Electric heating feasibility:

[0031] External ceramic heating sheet heating, a total of 35 pieces, total power 350kw;

[0032] Each heating sheet power:

[0033] Steel thermal conductivity:

[0034] Set voltage:

[0035] Heating sheet resistance:

[0036] The temperature under this resistance and power:

[0037] When full load, the maximum temperature of the heating sheet is 1066℃,

[0038] Considering heat consumption and heat dissipation, the heat transfer efficiency is calculated as 50%:

[0039]

[0040] Therefore, the power of the heating sheet meets the use.

[0041] Prospect: the double-layer shaft sleeve heating method currently used in the factory is time-consuming and laborious. This double-layer shaft sleeve electric heating expansion device can save a lot of manpower and material resources for the factory, and save costs and create value for the company.

[0042] The above embodiments of the utility model are only used for clearly illustrating the examples made by the utility model, but not used for limiting the protection scope of the utility model, and all equivalent technical solutions also belong to the category of the utility model, and the patent protection scope of the utility model should be defined by each claim.

Claims

1. A double bushing electrically heated expansion device characterized by: Including fixed bucket (6), mounting frame (8), the fixed bucket (6) is provided with handle (4) around, heating pipe (7) is evenly distributed to fixed bucket (6), the upper end of fixed bucket (6) is provided with sealing upper cover (3), the lower end is provided with sealing bottom cover (5), the mounting frame (8) is provided with wire fixing assembly, for fixing the line of heating pipe (7), the top of mounting frame (8) is provided with hoisting hole (1).

2. The dual bushing electrical heating expansion device of claim 1, wherein: The heating pipe (7) is circumferentially matched with the double-layer shaft sleeve (10), uniformly heats the inner layer shaft sleeve, and the double-layer shaft sleeve (10) is provided with ceramic heating sheet (11) on the outside.

3. The dual bushing electrical heating expansion device of claim 1, wherein: The wire fixing assembly comprises a wire fixing disc (9), and a plurality of wire fixing loops (2) are evenly arranged on the wire fixing disc (9).

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