A method for installing an industrial furnace directly connected fan

Abstract

A kind of installation method of industrial furnace direct connection fan, direct connection fan includes impeller, transmission shaft and water-cooled motor, installation method is to install support plate and motor support on the outer wall of furnace body, the end of transmission shaft located outside furnace body has transmission shaft outer taper surface, transmission shaft is located on the end surface outside furnace body and is provided with shaft end threaded hole, the motor spindle of water-cooled motor is hollow shaft, the inner hole of motor spindle has inner taper surface towards the side of furnace body, tight pin is arranged in the inner hole of motor spindle, the threaded end of tight pin is screwed into shaft end threaded hole, the other end of tight pin is clamped to the end surface of motor spindle far from the side of furnace body, so that inner taper surface and transmission shaft outer taper surface keep close transmission, eliminate the radial clearance of inner and outer taper surface, ensure that the torque of taper transmission can be reliably transmitted and withstand impact load, overcome the problem that direct connection fan cannot be used due to the distance from furnace body is relatively close, work and environment temperature is too high, can simplify the structure of fan for industrial furnace, reduce design difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fan for industrial furnace, in particular to a mounting method of direct connection fan for industrial furnace. BACKGROUND

[0002] As a general machinery, the driving mode of fan mainly has direct connection driving, belt driving and coupling driving, etc. Among them, the fan structure of direct connection form is the simplest, the design and manufacturing difficulty is the lowest, the production and use cost is the smallest, and the direct connection structure is the first choice of fan structure under normal working condition. However, in the industry of industrial furnace, because the temperature of furnace body is high, the motor, bearing and other parts located outside the furnace are easily affected by the high temperature outside the furnace, so the motor and other parts need to be as far away from the furnace body as possible as a heat source. When the motor is far away from the impeller located in the furnace body, the belt driving or coupling driving is usually used, which leads to the complex structure of fan for industrial furnace, the greater design and manufacturing difficulty, and the inconvenience of installation and maintenance. SUMMARY

[0003] The purpose of the present application is to provide a mounting method of direct connection fan for industrial furnace, which simplifies the fan structure of industrial furnace, and has reliable connection, convenient disassembly and assembly, and simple structure.

[0004] The technical scheme adopted by the present application to solve the above technical problems is: a mounting method of direct connection fan for industrial furnace, the direct connection fan comprising an impeller, a transmission shaft and a water-cooled motor, the impeller being located inside the furnace body of the industrial furnace, and the water-cooled motor being located outside the furnace body of the industrial furnace, the mounting method comprising:

[0005] a plurality of bolts are arranged on the support plate and screwed into the outer wall of the furnace body, so as to install the support plate on the outer wall of the furnace body; one end of the transmission shaft is connected with the impeller, the other end of the transmission shaft penetrates the furnace body and the support plate and extends to the outside of the furnace body, the end of the transmission shaft located outside the furnace body has a transmission shaft outer taper surface, and an axial threaded hole is formed in the end surface of the transmission shaft located outside the furnace body; a heat dissipation disc is installed on the transmission shaft, the heat dissipation disc is located between the support plate and the transmission shaft outer taper surface, and the cross section of the heat dissipation disc is H-shaped structure;

[0006] Then the motor support is connected on the support plate, and the water-cooled motor is installed on the motor support, the motor spindle of the water-cooled motor is a hollow shaft with an axial inner hole, the inner hole of the motor spindle has an inner taper surface on the side facing the furnace body, the inner taper surface matches the transmission shaft outer taper surface, a tight pin is arranged in the inner hole of the motor spindle, after the inner taper surface and the transmission shaft outer taper surface are in contact with each other, the threaded end of the tight pin is screwed into the axial threaded hole, so that the other end of the tight pin is clamped on the end surface of the motor spindle away from the furnace body, and the transmission shaft is axially locked after the tight pin is screwed into the axial threaded hole, so as to ensure that the inner taper surface and the transmission shaft outer taper surface remain in contact with each other.

[0007] According to the above technical solution, the application has the following advantages:

[0008] The motor main shaft and the transmission shaft are directly connected, without the use of belt transmission and shaft coupling, so that the fan structure of the industrial furnace is simplified, the design and manufacturing difficulty is reduced, the water-cooled motor is fixed on the outside of the furnace body through the motor support and the support plate, and the installation and maintenance are facilitated. In order to make the motor far away from the furnace body as a heat source, and meet the special use requirements of the industrial furnace special fan, the motor main shaft and the transmission shaft are driven by the inner and outer taper surfaces, and the transmission shaft is axially locked after the tight pull pin is screwed into the shaft end threaded hole, so that the inner taper surface and the outer taper surface of the transmission shaft are kept in close contact without loosening, thereby eliminating the radial gap between the inner and outer taper surfaces, ensuring that the taper transmission can reliably transmit torque and withstand impact load, overcoming the technical problem that the existing direct connection fan cannot be used due to the close distance from the furnace body and the high working and environmental temperature, and the connection is reliable, the disassembly and assembly are convenient, and the structure is simple. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a schematic view of the application;

[0010] Figure 2 is Figure 1 a partial enlarged view;

[0011] Figure 3 is Figure 1 a right view.

[0012] Marked in the figure: 1, furnace body, 2, impeller, 3, transmission shaft, 4, water-cooled motor, 5, motor main shaft, 6, motor support, 7, support plate, 8, heat dissipation disc, 9, transmission shaft outer taper surface, 10, shaft end threaded hole, 11, tight pull pin. DETAILED DESCRIPTION

[0013] Referring to the drawings, the specific implementation is as follows:

[0014] An installation method of an industrial furnace direct connection fan, the direct connection fan as shown in Figure 1 includes an impeller 2, a transmission shaft 3 and a water-cooled motor 4, the impeller 2 is located inside the furnace body 1 of the industrial furnace, and the water-cooled motor 4 is located outside the furnace body 1 of the industrial furnace, and the installation method of the direct connection fan is as follows.

[0015] A plurality of bolts are provided on the support plate 7, and the bolts are screwed into the outer wall of the furnace body 1, so that the support plate 7 is installed on the outer wall of the furnace body 1. One end of the transmission shaft 3 is connected with the impeller 2, the other end of the transmission shaft 3 penetrates the furnace body 1 and the support plate 7 and extends to the outside of the furnace body 1, the end of the transmission shaft 3 located outside the furnace body 1 has a transmission shaft outer taper surface 9, and the end surface of the transmission shaft 3 located outside the furnace body 1 is provided with a shaft end threaded hole 10.

[0016] A heat dissipation disc 8 is mounted on the transmission shaft 3, and is located between the support plate 7 and the outer taper surface 9 of the transmission shaft. The heat dissipation disc 8 has an H-shaped cross section, and is tightly fitted with the transmission shaft 3. When the transmission shaft 3 rotates, the heat dissipation disc 8 rotates synchronously, so that a large amount of flowing air is generated near the transmission shaft 3, thereby dissipating heat and reducing the heat transfer from the furnace body 1 to the water-cooled motor 4. In order to prevent the water-cooled motor 4 from being damaged due to high temperature, the distance between the water-cooled motor 4 and the outer wall of the furnace body 1 is as large as possible. In order to ensure the reliability of torque transmission, the inner and outer taper surface transmission is adopted.

[0017] Then, the motor support 6 is connected to the support plate 7, and the water-cooled motor 4 is mounted on the motor support 6. The motor shaft 5 of the water-cooled motor 4 is a hollow shaft with an axial inner hole. Figure 2 As shown in the figure, the inner hole of the motor shaft 5 has an inner taper surface on the side facing the furnace body 1, which matches the outer taper surface 9 of the transmission shaft. Figure 2 As shown in the figure, the inner hole of the motor shaft 5 is provided with a tight pin 11. After the inner taper surface and the outer taper surface 9 of the transmission shaft are in contact with each other, the threaded end of the tight pin 11 is screwed into the shaft end threaded hole 10, so that the other end of the tight pin 11 is clamped to the end face of the motor shaft 5 away from the furnace body 1. After the tight pin 11 is screwed into the shaft end threaded hole 10, the transmission shaft 3 is axially locked, so that the inner taper surface and the outer taper surface 9 of the transmission shaft remain in contact and do not loosen, thereby eliminating the radial gap between the inner and outer taper surfaces, ensuring that the taper transmission can reliably transmit torque and withstand impact load. Even when the distance between the water-cooled motor 4 and the impeller 2 is large, the transmission shaft 3 and the motor shaft 5 can also efficiently transmit power, so that the direct connection blower can meet the technical requirements of the industrial furnace that the distance between the motor and the impeller is far away.

Claims

1. A method for installing a direct-coupled fan of an industrial furnace, said direct-coupled fan comprising an impeller (2), a drive shaft (3) and a water-cooled motor (4), the impeller (2) being located inside a furnace body (1) of the industrial furnace and the water-cooled motor (4) being located outside the furnace body (1) of the industrial furnace, characterized in that, The installation method is: A plurality of bolts are arranged on the support plate (7) and screwed into the outer wall of the furnace body (1), so that the support plate (7) is installed on the outer wall of the furnace body (1); one end of the transmission shaft (3) is connected with the impeller (2), the other end of the transmission shaft (3) penetrates the furnace body (1) and the support plate (7) and extends to the outside of the furnace body (1), the end of the transmission shaft (3) located outside the furnace body (1) has a transmission shaft outer taper surface (9), and an axial threaded hole (10) is arranged on the end surface of the transmission shaft (3) located outside the furnace body (1); the heat dissipation disc (8) is installed on the transmission shaft (3), the heat dissipation disc (8) is located between the support plate (7) and the transmission shaft outer taper surface (9), and the cross section of the heat dissipation disc (8) is H-shaped structure; Then the motor support (6) is connected on the support plate (7), and the water-cooled motor (4) is installed on the motor support (6), the motor spindle (5) of the water-cooled motor (4) is a hollow shaft with an axial inner hole, the inner hole of the motor spindle (5) has an inner taper surface on the side facing the furnace body (1), the inner taper surface is matched with the transmission shaft outer taper surface (9), the inner hole of the motor spindle (5) is arranged with a tight pull pin (11), after the inner taper surface and the transmission shaft outer taper surface (9) are in contact with each other, the threaded end of the tight pull pin (11) is screwed into the axial threaded hole (10), so that the other end of the tight pull pin (11) is clamped on the end surface of the motor spindle (5) away from the furnace body (1), and the transmission shaft (3) is axially locked after the tight pull pin (11) is screwed into the axial threaded hole (10), so that the inner taper surface and the transmission shaft outer taper surface (9) are kept in contact.

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