Device for quickly drawing coupling of fan

Abstract

The utility model discloses a device for quickly drawing a coupling of a fan. The device comprises a fixed sleeve, a fixed chuck and a movable chuck, the fixed chuck is arranged at the end part of the fixed sleeve, and the fixed chuck is connected with the movable chuck through a connecting bolt; the fixing sleeve is of a semicircular groove structure, and a hydraulic jack is installed in the fixing sleeve. The extending end of the hydraulic jack penetrates through the fixed chuck and the movable chuck to abut against a wheel shaft in the center of the coupling. The device is small in size, can replace the bearings at the input end of the fan under the conditions of not moving the coupler box body and not repeatedly aligning the center, saves maintenance time, improves safety and working efficiency, assists a unit to quickly recover a stable working condition, improves the operation safety of the unit, ensures the stability of energy supply, and grabs the generating capacity for companies.

Description

Technical Field

[0001] The utility model relates to the field of backrest wheel equipment for a primary fan in a thermal power plant, in particular to a device for quickly pulling out a backrest wheel for a fan. Background Art

[0002] In a thermal power plant, the primary fan provides primary air for boiler combustion. The air coming out of the fan is divided into two paths. One path is called hot primary air after passing through the air preheater, and the other path is called cold primary air without passing through the air preheater. Among them, the hot primary air provides drying output and ventilation output for the coal mill, and dries the coal powder ground by the coal mill and carries the coal powder into the boiler burner. The cold primary air and the hot primary air are mixed at the inlet of the coal mill to adjust the inlet and outlet temperatures of the coal mill, and are also part of the ventilation output of the coal mill.

[0003] like Figure 7 As shown in the figure, in the conventional equipment layout, one unit is equipped with two primary fans, and the primary fan is driven by an electric motor connected to a hydraulic coupling. In this rotating structure, the bearing sleeve at the input end of the fan is set on the drive shaft of the motor. One end of the drive shaft is connected to the fan, and the other end passes through the backrest wheel and is connected to the hydraulic coupling. During the actual operation of the fan on site, due to its long-term continuous operation, the bearings used to support the drive shaft are prone to damage, so the bearings need to be replaced in time. Due to the failure of a bearing at the drive end of a fan to stop operation, the unit must limit 50% of the load, and the operating condition stability is poor, there is a risk of non-stop, so every second counts for replacing the fan bearing without stopping the unit.

[0004] The backrest wheel is composed of two symmetrically arranged wheel bodies. When replacing the bearing, you need to first remove the backrest wheel at the input end of the coupler, and then pull out the backrest wheel on the fan side.

[0005] Currently, there are two methods to remove the coupler input end pair wheel:

[0006] The first method is to open the upper cover of the coupler and lift out the core pack inside together with the side back wheel of the coupler. Although this method will free up a small space, it is impossible to complete the removal using a traditional hydraulic puller due to the small space.

[0007] The second method is to loosen the coupler feet and connecting pipes. Although this method will free up enough space for the use of a hydraulic puller to remove the fan side backrest wheel, the coupler needs to be hoisted back to its original position after the bearing is replaced, and then the hydraulic coupling output end and the fan side as well as the motor and hydraulic coupling input end are aligned twice to complete the installation. This bearing replacement method not only requires more equipment to be moved, but also requires repeated center alignment, which is time-consuming and labor-intensive, and takes a long time. It requires extremely high accuracy, affects the normal work progress, wastes time, and has the risk of damaging equipment. Utility Model Content

[0008] The utility model aims at the technical defects mentioned in the background technology and provides a device for quickly pulling out the fan backrest wheel, which can complete the replacement of the fan input end bearing without moving the coupler box and repeatedly aligning the center.

[0009] In order to achieve the above technical purpose, the technical solution adopted by the utility model is: a device for quickly pulling out the fan backrest wheel, including a fixed sleeve, a fixed clamping plate and a movable clamping plate;

[0010] The fixed chuck is arranged at the end of the fixed sleeve, and the fixed chuck is connected to the movable chuck by connecting bolts;

[0011] The fixing sleeve is a semicircular trough structure, and a hydraulic jack is installed inside the fixing sleeve;

[0012] The extended end of the hydraulic jack passes through the fixed clamping plate and the movable clamping plate and contacts the wheel shaft at the center of the backrest wheel.

[0013] As a preferred technical solution: the movable clamping plate and the fixed clamping plate are respectively arranged on both sides of the outer wheel body of the backrest wheel, and connecting bolts are evenly distributed on the outer circumferences of the two.

[0014] As a preferred technical solution: the movable chuck is a circular structure composed of two semicircular rings, the inner diameter of the movable chuck sleeve hole in the center thereof corresponds to the outer diameter of the inner wheel body of the backrest wheel; and through holes are evenly distributed on the annular body.

[0015] As a preferred technical solution: the fixed chuck is a circular ring structure, the inner diameter of the fixed chuck sleeve hole in the center thereof corresponds to the outer diameter of the extended end of the hydraulic jack; and the connecting bolts are evenly distributed on the ring body.

[0016] As a preferred technical solution: the tail end of the hydraulic jack is fixed to the inner wall of the fixed sleeve through a connecting piece; the center of the hydraulic jack is in line with the center of the backrest wheel axle, the center of the fixed chuck and the center of the movable chuck.

[0017] Compared with the existing technology, the utility model has a small size and can replace the bearing on the input end of the fan without moving the coupler box or repeatedly aligning the center, saving maintenance time, improving safety and work efficiency, helping the unit to quickly restore stable operating conditions, improving the safety of unit operation, ensuring the stability of energy supply, and increasing power generation for the company. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the backrest wheel structure.

[0020] Figure 3It is a schematic diagram of the structure of the utility model from top view.

[0021] Figure 4 It is a schematic diagram of the structure of the movable chuck in the utility model.

[0022] Figure 5 It is a schematic diagram of the fixed chuck structure in the utility model.

[0023] Figure 6 It is a side structural schematic diagram of the utility model.

[0024] Figure 7 It is a schematic diagram of the existing backrest wheel and bearing installation position.

[0025] In the figure: axle 1, backrest wheel 2, movable chuck 3, fixed chuck 4, fixed sleeve 5, connecting bolt 6, movable chuck sleeve hole 7, hydraulic jack 8, fixed chuck sleeve hole 9, bearing 10. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] See attached Figure 1-6 The device for quickly pulling out the fan backrest wheel disclosed in the utility model comprises a fixed sleeve 5, a fixed clamping plate 4 and a movable clamping plate 3. The entire pulling device is installed on the backrest wheel at the end of the wheel shaft on the fan side, and is clamped with the backrest wheel 2 by the movable clamping plate 3 and the fixed clamping plate 4, and the wheel shaft is tightened by the hydraulic jack 8, and the backrest wheel is pulled out by the reaction force.

[0028] The fixed chuck 4 is arranged at the end of the fixed sleeve 5, and the two can be integrally formed or fixed by welding. The fixed chuck 4 is connected to the movable chuck 3 by a connecting bolt 6. The fixed sleeve 5 is a semicircular trough structure, and a hydraulic jack 8 is installed inside it. The extended end of the hydraulic jack 8 passes through the fixed chuck 4 and the movable chuck 3 and contacts the wheel shaft 1 at the center of the backrest wheel.

[0029] As a preferred embodiment: the movable chuck 3 and the fixed chuck 4 are arranged on both sides of the outer wheel body of the backrest wheel, and the outer circumferences of the two are evenly distributed with connecting bolts 6. Among them: the movable chuck 3 is a circular ring structure composed of two semicircular rings, and the inner diameter of the movable chuck sleeve hole 7 in the center corresponds to the outer diameter of the inner wheel body of the backrest wheel 2; through holes are evenly distributed on its annular body; and a notch is set on its annular body. The fixed chuck 4 is a circular ring structure, and the inner diameter of the fixed chuck sleeve hole 9 in the center corresponds to the outer diameter of the extended end of the hydraulic jack 8; connecting bolts 6 are evenly distributed on its annular body. The free end of the screw in the connecting bolt 6 passes through the through hole on the movable chuck 3, and then the screw is screwed on the outer side of the movable chuck 3 with a nut to achieve the clamping of the backrest wheel.

[0030] The tail end of the hydraulic jack 8 is fixed to the inner wall of the fixed sleeve 5 by bolts and other connecting parts; the center of the hydraulic jack 8 is collinear with the center of the backrest wheel axle, the center of the fixed chuck and the center of the movable chuck.

[0031] The hydraulic jack 8 in this embodiment is a 30-ton split hydraulic jack. The hydraulic jack is placed in the groove of the fixed sleeve, and the extended end of the jack is aligned with the fixed clamping plate sleeve hole 9. Figure 1 As shown, the movable clamping plate and the fixed clamping plate cooperate to clamp and lock the backrest wheel of the fan. When it is necessary to disassemble, unscrew the nut in the connecting bolt 6, and use the extended end of the hydraulic jack to press the end of the wheel shaft 1. Under the reaction, the backrest wheel is pushed out to the right (direction in the figure) and separated from the wheel shaft, so that the backrest wheel can be disassembled and the bearing can be replaced afterwards.

Claims

1. A device for quickly pulling out the fan backrest wheel, characterized in that: It includes a fixed sleeve, a fixed chuck and a movable chuck; The fixed chuck is arranged at the end of the fixed sleeve, and the fixed chuck is connected to the movable chuck by connecting bolts; The fixing sleeve is a semicircular trough structure, and a hydraulic jack is installed inside the fixing sleeve; The extended end of the hydraulic jack passes through the fixed clamping plate and the movable clamping plate and contacts the wheel shaft at the center of the backrest wheel.

2. The device for quickly pulling out the fan backrest wheel according to claim 1, characterized in that: The movable clamping plate and the fixed clamping plate are respectively arranged on both sides of the outer wheel body of the backrest wheel, and connecting bolts are evenly distributed on the outer circumferences of the two.

3. The device for quickly pulling out the fan backrest wheel according to claim 1, characterized in that: The movable chuck is a circular structure composed of two semicircular rings, the inner diameter of the movable chuck sleeve hole in the center of the movable chuck corresponds to the outer diameter of the inner wheel body of the backrest wheel; and through holes are evenly distributed on the annular body.

4. The device for quickly pulling out the fan backrest wheel according to claim 1, characterized in that: The fixed chuck is a circular ring structure, the inner diameter of the fixed chuck sleeve hole in the center thereof corresponds to the outer diameter of the extended end of the hydraulic jack; and the connecting bolts are evenly distributed on the ring body thereof.

5. The device for quickly pulling out the fan backrest wheel according to claim 1, characterized in that: The tail end of the hydraulic jack is fixed on the inner wall of the fixed sleeve through a connecting piece; the center of the hydraulic jack is in line with the center of the axle of the backrest wheel, the center of the fixed clamping plate and the center of the movable clamping plate.

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