High-temperature fan shaft temperature measuring device

Abstract

The invention relates to a high-temperature fan shaft temperature measuring device which comprises a horizontal base, a driving unit is fixedly arranged on the horizontal base, and a high-temperature box is arranged on one side of the driving unit; the driving unit comprises a motor, the motor is fixedly connected with a horizontal base, the output end of the motor is connected with a coupler, the end, away from the motor, of the coupler is connected with a driving shaft, a bearing box is arranged on the outer side of the driving shaft, one end of the driving shaft is fixedly connected with a flange plate, and one side of the flange plate is fixedly connected with a testing shaft. The device can be used for measuring the shaft temperature of various types and models of high-temperature fans; the high-temperature fan shaft temperature measuring device can be used for research, development and design of a high-temperature fan, provides a test basis for design of components such as a high-temperature fan shaft, a shaft heat insulation sleeve and a cooling fan, can also be used for replacing field high-temperature fan shaft temperature measurement, solves the problem that the field high-temperature fan shaft temperature is difficult to measure, is compact in structure and low in manufacturing cost, and has good economic benefits.

Description

Technical Field

[0001] The invention relates to the technical field of fans, and in particular to a shaft temperature measuring device for a high-temperature fan. Background Art

[0002] The operating temperature of high-temperature fans is relatively high (up to 650°C). Usually, the bearings and drive devices of high-temperature fans are installed outside the fan housing. After the fan shaft extends from the fan housing, it usually needs to pass through the shaft insulation sleeve, shaft seal and cooling fan to reduce the temperature of the shaft before entering the bearing unit to prevent the bearing temperature from exceeding the allowable operating limit and ensure the service life of the bearing.

[0003] The shaft temperature before entering the bearing is an important parameter in the design of high-temperature fans. The design should ensure that the temperature is lower than the allowable operating temperature limit of the bearing. Due to the complex heat transfer mechanism of the high-temperature fan shaft, it is difficult to calculate the shaft temperature before entering the bearing in theory.

[0004] Since the shaft of a high-temperature fan rotates at high speed during operation, the shaft temperature of the high-temperature fan cannot be measured using a contact thermometer, and can usually only be measured using a non-contact infrared thermometer. For high-temperature fans, a feasible method is to install a special bracket on the fan, use the bracket to fix the infrared thermometer, and measure the shaft temperature through the thermometer. Since infrared thermometers have many restrictions on the measurement distance, heat radiation area, ambient temperature, etc., coupled with the harsh working environment of high-temperature fans and limited fan structure space, the above-mentioned shaft temperature measurement method is not feasible for many high-temperature fans running on site. Summary of the invention

[0005] In view of the above problems existing in the prior art, the main purpose of the present invention is to provide a high-temperature fan shaft temperature measuring device.

[0006] The technical solution of the present invention is as follows: a high-temperature fan shaft temperature measuring device comprises a horizontal base, a driving unit is fixedly arranged on the horizontal base, and a high-temperature box is arranged on one side of the driving unit;

[0007] The driving unit comprises a motor, the motor is fixedly connected to a horizontal base, the output end of the motor is connected to a coupling, the end of the coupling away from the motor is connected to a driving shaft, a bearing box is provided on the outside of the driving shaft, one end of the driving shaft is fixedly connected to a flange, one side of the flange is fixedly connected to a test shaft, a cooling fan is provided on the test shaft, one side of the cooling fan is provided with a shaft heat insulation sleeve located on the test shaft, one end of the test shaft away from the flange is fixedly connected to a hub, and a circulating fan is provided on the hub;

[0008] The high temperature box comprises a high temperature box front plate, one side of the high temperature box front plate is fixedly connected to the main box by bolts, and the side of the main box away from the high temperature box front plate is connected to the high temperature box back plate by bolts;

[0009] The main box is fixedly provided with a temperature controller and an electric heater, a temperature sensor is fixedly provided on one side of the main box corresponding to the temperature controller, and an infrared thermometer is provided on the back plate of the high temperature box.

[0010] As a preferred implementation, the high temperature box back plate is provided with an axial hole, a plurality of flange holes are arranged around the axial hole, and the high temperature box is made of heat-insulating material.

[0011] As a preferred embodiment, second flanges are welded at both ends of the shaft insulation sleeve, the second flange of the shaft insulation sleeve close to the wheel hub is connected to the flange hole on the back plate of the high temperature box, and the second flange of the shaft insulation sleeve close to the cooling fan is connected to the shaft seal.

[0012] As a preferred embodiment, the flange plate is composed of a flange fixed at one end of the driving shaft and a flange fixed at one end of the testing shaft connected by bolts, the flange at one end of the driving shaft is provided with an annular mortise and tenon, and the flange at one end of the testing shaft is provided with an annular matching tongue.

[0013] As a preferred implementation, the motor is a variable frequency motor.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are that the device can be used to measure the shaft temperature of various types and models of high-temperature fans; it can be used for the research and development and design of high-temperature fans, and provide a test basis for the design of high-temperature fan shafts, shaft insulation sleeves, cooling fans and other components; it can also be used to replace the measurement of on-site high-temperature fan shaft temperature, solving the problem that the on-site high-temperature fan shaft temperature is difficult to measure; and it has a compact structure, low manufacturing cost, and good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention provides a schematic diagram of the overall structure of a high-temperature fan shaft temperature measuring device;

[0016] Figure 2 A side view of a high-temperature fan shaft temperature measuring device is provided for the present invention;

[0017] Figure 3 A planed schematic diagram of a high-temperature fan shaft temperature measuring device is provided for the present invention;

[0018] Figure 4 The present invention provides an enlarged schematic diagram of point A of a high-temperature fan shaft temperature measuring device.

[0019] Legend: 1. Horizontal base; 2. Drive unit; 21. Motor; 22. Coupling; 23. Bearing box; 24. Drive shaft; 25. Flange; 26. Test shaft; 27. Cooling fan; 28. Shaft insulation sleeve; 29. ​​Circulation fan; 210. Wheel hub; 3. High temperature box; 31. High temperature box front plate; 32. Main box; 33. High temperature box back plate; 4. Electric heater; 5. Temperature controller; 6. Temperature sensor; 7. Infrared thermometer. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Example

[0025] A high-temperature fan shaft temperature measuring device comprises a horizontal base 1, a driving unit 2 is fixedly arranged on the horizontal base 1, a high-temperature box 3 is arranged on one side of the driving unit 2, and the high-temperature box 3 and the driving unit 2 are installed together on the horizontal base 1. When testing shafts of different lengths, the high-temperature box 3 can be moved axially to ensure that the length of the shaft inserted into the high-temperature box 3 is consistent with the length of the shaft of the high-temperature fan to be tested inserted into the wind casing;

[0026] The driving unit 2 includes a motor 21, the motor 21 is fixedly connected to the horizontal base 1, the output end of the motor 21 is connected to the coupling 22, the end of the coupling 22 away from the motor 21 is connected to the driving shaft 24, the outer side of the driving shaft 24 is provided with a bearing box 23, one end of the driving shaft 24 is fixedly connected to the flange 25, one side of the flange 25 is fixedly connected to the test shaft 26, the test shaft 26 is provided with a cooling fan 27, one side of the cooling fan 27, and a shaft insulation sleeve 28 is provided on the test shaft 26, the end of the test shaft 26 away from the flange 25 is fixedly connected to the hub 210, the hub 2 10 is provided with a circulation fan 29; when the motor 21 rotates, the driving shaft 24 is driven to rotate through the coupling 22, the driving shaft 24 drives the test shaft 26 to rotate, the test shaft 26 drives the hub 210, the circulation fan 29 and the cooling fan 27 to rotate, the function of the cooling fan 27 is to transfer the heat of the test shaft 26 to the ambient air to reduce the temperature of the shaft, the outer diameter and axial width of the cooling fan 27 have a significant effect on the heat transfer effect of the cooling fan 27, the function of the circulation fan 29 is to circulate the air of the high temperature box 3 to make the air temperature in the box evenly distributed;

[0027] The high temperature box 3 includes a high temperature box front plate 31, one side of the high temperature box front plate 31 is fixedly connected to the main box 32 by bolts, and the side of the main box 32 away from the high temperature box front plate 31 is connected to the high temperature box back plate 33 by bolts;

[0028] A thermostat 5 and an electric heater 4 are fixedly provided on the main box 32. A temperature sensor 6 is fixedly provided on the side of the main box 32 corresponding to the thermostat 5. An infrared thermometer 7 is provided on the back plate 33 of the high-temperature box. The infrared thermometer 7 is installed on the outside of the high-temperature box, axially, between the cooling fan and the test shaft flange. This temperature corresponds to the temperature of the high-temperature fan shaft before entering the bearing. The temperature of the high-temperature fan to be tested is set by the thermostat 5, and the electric heater 4 and the motor 21 are started. When the temperature in the high-temperature box 3 reaches the test temperature (judged by the temperature displayed on the display screen of the thermostat 5), the shaft temperature can be measured by the infrared thermometer 7.

[0029] The high temperature box back plate 33 is provided with an axial hole for the shaft to pass through, and a plurality of flange holes are arranged around the axial hole for fixing the shaft insulation sleeve 28. The high temperature box 3 is made of insulation material, and the insulation material can be selected from high temperature resistant rock wool and ceramic wool.

[0030] Second flanges are welded to both ends of the shaft insulation sleeve 28. The second flange of the shaft insulation sleeve 28 on the side close to the hub 210 is connected to the flange hole on the high-temperature box back plate 33. The second flange of the shaft insulation sleeve 28 on the side close to the cooling fan 27 is connected to the shaft seal. The outside of the shaft insulation sleeve 28 is filled with high-temperature resistant insulation material (rock wool, ceramic wool). One function of the shaft insulation sleeve 28 is to reduce the temperature of the shaft extending out of the high-temperature box 3, and the other function is to prevent the shaft seal from being subjected to the high temperature in the high-temperature box 3. Generally, the smaller the inner diameter and the longer the length of the shaft insulation sleeve 28, the better the cooling effect on the shaft and the insulation effect on the shaft seal. Since the shaft insulation sleeve 28 is connected to the high-temperature box back plate 33 by bolts, it is easy to disassemble and assemble. During the test, shaft insulation sleeves 28 of different inner diameters and different lengths can be replaced as needed. The shaft seal is fixed to the outer flange of the shaft insulation sleeve 28 by bolts. It is easy to disassemble and assemble. During the test, different types of shaft seals can be replaced as needed.

[0031] The flange 25 is composed of a flange fixed at one end of the drive shaft 24 and a flange fixed at one end of the test shaft 26 connected by bolts. The flange at one end of the drive shaft 24 has an annular mortise and tenon, and the flange at one end of the test shaft 26 has an annular matching tongue, which can ensure that the test shaft 26 is aligned with the drive shaft 24.

[0032] The motor 21 is a variable frequency motor, and its rotation speed can be controlled by a frequency converter, so that the shaft can be tested at different rotation speeds.

[0033] Working principle:

[0034] As shown in the figure, when in use, start the motor 21 to drive the coupling 22, then the drive shaft 24 rotates, the drive shaft 24 drives the test shaft 26 to rotate, the test shaft 26 drives the hub 210, the circulation fan 29 and the cooling fan 27 to rotate, and the temperature sensor 6 is used to monitor the temperature inside the high temperature box 3. If the temperature is low and needs to be heated, start the electric heater 4 to make the temperature inside the high temperature box 3 reach the test temperature, and then measure the shaft temperature through the infrared thermometer 7.

[0035] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-temperature fan shaft temperature measuring device, comprising a horizontal base (1), characterized in that: A driving unit (2) is fixedly mounted on the horizontal base (1), and a high-temperature box (3) is mounted on one side of the driving unit (2); The drive unit (2) comprises a motor (21), wherein the motor (21) is fixedly connected to a horizontal base (1), an output end of the motor (21) is connected to a coupling (22), an end of the coupling (22) away from the motor (21) is connected to a drive shaft (24), a bearing box (23) is provided on the outside of the drive shaft (24), one end of the drive shaft (24) is fixedly connected to a flange (25), one side of the flange (25) is fixedly connected to a test shaft (26), a cooling fan (27) is provided on the test shaft (26), one side of the cooling fan (27) is provided on the test shaft (26), an axis heat insulation sleeve (28) is provided, and one end of the test shaft (26) away from the flange (25) is fixedly connected to a hub (210), and a circulating fan (29) is provided on the hub (210); The high temperature box (3) comprises a high temperature box front plate (31), one side of the high temperature box front plate (31) is fixedly connected to the main box (32) by bolts, and the side of the main box (32) away from the high temperature box front plate (31) is connected to the high temperature box back plate (33) by bolts; A temperature controller (5) and an electric heater (4) are fixedly provided on the main box (32), a temperature sensor (6) is fixedly provided on one side of the main box (32) corresponding to the temperature controller (5), and an infrared thermometer (7) is provided on the back plate (33) of the high-temperature box.

2. A high temperature fan shaft temperature measuring device according to claim 1, characterized in that: The high temperature box back plate (33) is provided with an axial hole, and a plurality of flange holes are arranged around the axial hole. The high temperature box (3) is made of heat insulating material.

3. The high temperature fan shaft temperature measuring device according to claim 1, characterized in that: Second flanges are welded to both ends of the shaft heat insulation sleeve (28); the second flange on the side of the shaft heat insulation sleeve (28) close to the wheel hub (210) is connected to the flange hole on the back plate (33) of the high temperature box; and the second flange on the side of the shaft heat insulation sleeve (28) close to the cooling fan (27) is connected to the shaft seal.

4. The high temperature fan shaft temperature measuring device according to claim 1, characterized in that: The flange plate (25) is composed of a flange fixed at one end of the driving shaft (24) and a flange fixed at one end of the testing shaft (26) connected by bolts, the flange at one end of the driving shaft (24) is provided with an annular tenon groove, and the flange at one end of the testing shaft (26) is provided with an annular matching tenon.

5. The high temperature fan shaft temperature measuring device according to claim 1, characterized in that: The motor (21) is a variable frequency motor.

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