CN202180324U - Device for dismounting bearing by resistance wire heating - Google Patents

Abstract

The utility model relates to the bearing maintenance, in particular to a device for dismounting large-size bearings. The device for dismounting a bearing by resistance wire heating comprises a lifting jack, a reaction frame and a heater, wherein the reaction frame comprises two steel plates which are respectively arranged at the two sides of a bearing to be dismounted along the axial direction, one steel plate is erected on a shaft and is close to the bearing to be dismounted, two rib strip plates are arranged at one side of the other steel plate, the lifting jack is mounted at the other side of the other steel plate transversely, the four ends of the two steel plates are connected by four split screw rods and eight nuts, and one end of the lifting jack is propped against the end face of the bearing to be dismounted; and the heater comprises heating wires which can be electrified, are wrapped by mica sheets and are wound at the excircle of the bearing to be dismounted or the excircle of a coupling. The device can be used for dismounting the bearings without utilizing heating oil, thereby being environmentally-friendly, low-carbon, safe and reliable.

Description

A kind of resistance wire heating bearing disassembling device

Technical field

The utility model relates to bearing and shaft coupling is safeguarded, relates in particular to the provision for disengagement of a kind of large size bearing and shaft coupling.

Background technology

Axle is extensive especially with the application of bearing and shaft coupling on the big-and-middle-sized plant equipment of metallurgical machinery sector at present, and the replacing of axle is very frequent.And bearing reuses, and to axle and bearing that interference fit is installed, it is very valuable that a lot of main shafts and bearing are arranged, and this just requires us must not damage under the situation of main shaft and bearing, disassembles bearing and shaft coupling, processes utilization again to axle.

The existing method of not damaging main shaft dismounting bearing mainly is a bearing heating disassembly method; It drenches with the oil that is heated to 100 degree and waters bearing; Utilization is expanded with heat and contract with cold; Thereby make bearing expand bearing removal is got off, only heat bearing and do not influence axle but this method is difficult to assurance, and the oil of 100 degree is also very big to the operating personnel Personal Risk.

CN101186011 discloses a kind of shaft bearing replacer, has to be fixed on the outer body of bearing inner shafts, is distributed with at least two hydraulic cylinders in the body, and hydraulic cylinder has the connector of hydraulic pressure input, hydraulic cylinder be furnished with overhanging and with the inboard relative plunger of bearing.The body of shaft bearing replacer is fixed on outside the bearing inner shafts like this; The connector of hydraulic pressure input is communicated with the hydraulic pressure transfer pipeline; Through the hydraulic cylinder discharge pressure that hydraulic system distributes in body, actuation plunger outwards moves and heads on bearing with being evenly distributed and outside axle, moves, and conveniently unloads lower bearing.Utilize the main shaft of roll dress bearing to do the strong point, tearing open bearing is pulled down, it is simple in structure, and is easy to use, and dismounting is convenient, does not damage main shaft.But employed hydraulic test, cost is high.

Summary of the invention

The utility model is intended to address the aforementioned drawbacks, and a kind of resistance wire heating bearing and shaft coupling provision for disengagement are provided.The utility model dismounting bearing need not to use heated oils, and is safe and reliable.Low-carbon environment-friendly.

A kind of resistance heated bearing disassembling device, it comprises a jack, it also comprises:

A reaction frame; It comprises be separately positioned on bearing shaft to be removed to two steel plates of both sides; A steel plate is erected on the axle and near bearing to be removed, and another steel plate one side has two rib plates, and said jack laterally is installed in the opposite side of this steel plate; Between two steel plate four ends with four to drawing pile bar and eight nuts to link together, said jack one end withstands on the end face of bearing to be removed;

A heater, said heater comprise the heating wire of switching on the mica sheet parcel, and are centered around on the cylindrical of bearing to be removed.

Described resistance wire heating bearing disassembling device is characterized in that said steel plate near bearing to be removed has a groove that holds said axle.

The utility model adopts instrument common in the construction and material with the bearing on the minimum cost better protection property dismounting main shaft; More economical being suitable for; Simple and fast; Be suitable for dismounting (available other instruments of the dismounting of small size bearing substitute jack), particularly the protectiveness fast Demolition of extra large size bearing of various big-and-middle-sized bearings, effect will be more obvious.

Description of drawings

Below, in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is the sketch map of the utility model;

Fig. 2 is the A-A cutaway view among Fig. 1;

Fig. 3 is the steel plate sketch map of described said connecting axle.

The specific embodiment

Like Fig. 1, Fig. 2 and shown in Figure 3, a kind of resistance wire heating bearing disassembling device, it comprises a jack 1, it also comprises:

A reaction frame; It comprises two steel plates that are separately positioned on the axial both sides of bearing to be removed 2; A steel plate 3 has a groove 31 (referring to Fig. 3) that holds said axle 4; And be erected on the axle 4 and near bearing 2 to be removed, another steel plate 5 one sides have two rib plates 51, and said jack 1 laterally is installed in the opposite side of this steel plate 5; Between 3,5 four jiaos of two steel plates with four to drawing pile bar 6 and eight nuts 7 to link together, said jack 1 one ends withstand on the end face of bearing 2 to be removed;

A heater, said heater comprise the heating wire of switching on 8 with mica sheet 9 parcel, and are centered around on the cylindrical of bearing 2 to be removed (seeing Fig. 2 for details).

Claims (2)

1. a resistance wire heats bearing disassembling device, and it comprises a jack, it is characterized in that it also comprises:

A reaction frame; It comprises be separately positioned on bearing shaft to be removed to two steel plates of both sides; A steel plate is erected on the axle and near bearing to be removed, and another steel plate one side has two rib plates, and said jack laterally is installed in the opposite side of this steel plate; Between two steel plate four ends with four to drawing pile bar and eight nuts to link together, said jack one end withstands on the end face of bearing to be removed;

A heater, said heater comprise the heating wire of switching on the mica sheet parcel, and are centered around on the cylindrical of bearing to be removed.

2. a kind of resistance wire heating bearing disassembling device according to claim 1 is characterized in that said steel plate near bearing to be removed has a groove that holds said axle.

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