High-temperature fan with ventilation holes in impeller shaft sleeve

Abstract

The utility model provides a high-temperature fan with vent holes in an impeller shaft sleeve, and belongs to the field of high-temperature fans. Comprising a motor, a motor shaft, a high-temperature impeller and a volute, the high-temperature impeller comprises a front disc, a rear disc and blades fixed between the front disc and the rear disc, an impeller air inlet is formed in the middle of the front disc, an impeller shaft sleeve is arranged in the middle of the rear disc in a penetrating mode, and vent holes penetrating front and back are formed in the sleeve wall of the impeller shaft sleeve. The vent hole capable of communicating the front and the back of the rear disc is formed in the impeller shaft sleeve, when the impeller is driven by the motor to rotate to induce air, air can enter from the impeller air inlet and the vent hole at the same time, hot air in the heating furnace is introduced from the impeller air inlet, and natural cold air outside the volute is introduced from the vent hole. Cold air circulating in the ventilation holes can cool the impeller shaft sleeve and the motor shaft connected with the impeller shaft sleeve.

Description

Technical Field

[0001] The utility model belongs to the field of high-temperature fans, and in particular relates to a high-temperature fan with ventilation holes on an impeller shaft sleeve. Background Art

[0002] Glass tempering furnaces usually consist of a loading platform, a heating furnace, a tempering and cooling section, and a lower platform. The glass is heated in the heating furnace and tempered and cooled in the tempering and cooling section.

[0003] A glass heating furnace generally includes a heating furnace body, a heating wire built into the heating furnace body, and a high-temperature fan that provides heat circulation for the heating furnace. The applicant has applied for a circulating air supply device for a high-temperature furnace body, application number 2023233997631. By placing the high-temperature fan outside the high-temperature furnace body, the fan is not in the high-temperature environment inside the furnace, and the service life of the fan is extended. The structure of the high-temperature fan is shown in the attached figure. Figure 1 As shown, it includes a motor a, a motor shaft b, an impeller c and a volute d. The motor shaft b is fixedly connected to the impeller sleeve c1 of the impeller c. The volute d has a volute air inlet d1 and a volute air outlet d2. The motor a drives the motor shaft b to rotate, and synchronously drives the impeller c to rotate, thereby introducing wind into the volute d and then discharging air from the volute air outlet d2.

[0004] However, the high-temperature fan actually circulates and guides the high-temperature air in the heating furnace body, which can reach a temperature of 600 degrees. If the motor shaft b is subjected to this high temperature for a long time, its performance and service life will be affected, which needs to be improved. Utility Model Content

[0005] Aiming at the problem in the prior art that the motor shaft of a high-temperature fan is subjected to high temperature for a long time, a high-temperature fan with ventilation holes on the impeller sleeve is provided to dissipate heat and cool the motor shaft in operation.

[0006] The technical solutions adopted by the present invention to solve the above technical problems are as follows.

[0007] A high-temperature fan with ventilation holes on the impeller sleeve, the fan includes a motor, a motor shaft, a high-temperature impeller and a volute, wherein the high-temperature impeller includes a front disk, a rear disk and blades fixed between the front disk and the rear disk, an impeller air inlet is opened in the middle of the front disk, and an impeller sleeve is passed through the middle of the rear disk, wherein the sleeve wall of the impeller sleeve is provided with ventilation holes that pass through from front to back.

[0008] Furthermore, the ring wall of the ventilation hole is provided with a plurality of ventilation holes.

[0009] Further, the volute further has a volute rear disc, a transverse volute rear disc sleeve is arranged on the volute rear disc, the impeller shaft sleeve is arranged in the volute rear disc sleeve, the inner diameter of the volute rear disc sleeve is larger than the outer diameter of the impeller shaft sleeve, a ventilation gap is formed between the volute rear disc sleeve and the impeller shaft sleeve, and a gap between the rear disc and the volute rear disc is a volute rear gap.

[0010] Compared with the prior art, the ventilation hole is arranged on the impeller shaft sleeve, and when the impeller is rotated to guide the air by the motor, the air can be introduced from the impeller air inlet and the ventilation hole at the same time, wherein the hot air in the heating furnace is introduced from the impeller air inlet, and the natural cold air outside the volute is introduced from the ventilation hole. The cold air flowing in the ventilation hole can cool the impeller shaft sleeve and the motor shaft connected thereto. In the utility model, the ventilation hole is arranged on the impeller shaft sleeve, so that the motor shaft connected thereto can be cooled more directly. At the same time, since the air is sucked into the ventilation hole from the end close to the motor, the air flows through the surface of the motor, and the motor can be cooled at one time. The impeller shaft sleeve and the motor shaft cooled in the utility model are in a lower temperature working environment compared with the prior art high-temperature fan, and the use performance and service life of the fan are improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a sectional view of the prior art high-temperature fan.

[0012] Figure 2 is a structure schematic view of the high-temperature impeller in the embodiment of the utility model.

[0013] Figure 3 is an air flow schematic view of the high-temperature impeller in the embodiment of the utility model.

[0014] Figure 4 is a structure schematic view of the high-temperature fan in the embodiment of the utility model.

[0015] Figure 5 is Figure 4 is a partial enlarged view of DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings.

[0017] Figure 1This is a cross-sectional view of an existing high-temperature blower. As can be seen from the figure, the existing high-temperature blower includes a motor a, a motor shaft b, an impeller c, and a volute d. The motor shaft b passes through the volute d and is inserted into the impeller sleeve c1 of the impeller c, fixedly connected thereto, driving the impeller c to rotate synchronously. The volute d has a volute air inlet d1 and a volute air outlet d2. Air is drawn into the volute d through the volute air inlet d1 and then discharged through the volute air outlet d2. Since the high-temperature blower's primary function is to direct the hot air within the heating furnace to achieve heat circulation within the furnace, the volute d circulates high-temperature air reaching up to 600 degrees Celsius. This poses a challenge to the use of the motor shaft b connected to the impeller sleeve c1.

[0018] Therefore, compared with the existing high temperature fans, Figure 2 、 3 As shown, this embodiment provides a high-temperature impeller C with ventilation holes on the impeller sleeve, including a front disc 1, a rear disc 2, and blades 3 fixed between the front disc 1 and the rear disc 2. The front disc 1 has an impeller air inlet 4 in the middle, and the rear disc 2 has an impeller sleeve 5 passing through the middle. The impeller sleeve 5 is annular and cylindrical, and the sleeve wall of the impeller sleeve 5 is provided with ventilation holes 6 extending from front to back. There are multiple ventilation holes 6 arranged around the sleeve wall.

[0019] like Figure 3 As shown, the ventilation hole 6 is directly connected to the area between the front disk 1 and the rear disk 2. This area is the main air suction area, that is, this area generates negative pressure as the motor shaft rotates, so that the air in the impeller air inlet 4 and the ventilation hole 6 can be sucked in and then diffused outward through the blades 3.

[0020] In this embodiment, a ventilation hole 6 is provided on the impeller sleeve 5, which is connected to the front and rear of the rear disc 2. When the impeller is driven by the motor to rotate and draw air, air can enter through the impeller air inlet 4 and the ventilation hole 6 simultaneously. The hot air introduced from the impeller air inlet 4 is the hot air from the heating furnace, and the naturally cold air introduced from the volute 6 is the naturally cold air outside the volute. The cold air flowing through the ventilation hole 6 can dissipate heat and cool the impeller sleeve 5 and the motor shaft connected thereto. In this embodiment, the ventilation hole 6 is provided on the impeller sleeve 5. The small amount of air drawn in from the ventilation hole 6 has little effect on the circulating hot air, but it can effectively and directly cool the motor shaft locally. At the same time, because air is drawn inward from the end of the ventilation hole near the motor, the air flows over the surface of the motor, which can also dissipate heat and cool the motor, achieving multiple goals at one stroke. Compared with existing high-temperature fans, the cooled impeller sleeve 5 and motor shaft in the utility model have a lower operating temperature, thereby improving their performance and extending their service life.

[0021] When the high-temperature impeller in this embodiment is actually used, the impeller outer cover is provided with a volute, one end of the motor shaft is inserted into the impeller shaft sleeve 5, and the other end of the motor shaft is connected to the motor.

[0022] Although there is a certain slot gap between the outer wall of the impeller sleeve c1 and the volute d in the existing high-temperature fan, the gap connects to the area between the impeller rear disk and the volute d. This area is on the outside of the impeller rear disk, and its wind pressure is much higher than that of the area between the front disk 1 and the rear disk 2. Therefore, the air volume introduced from the gap is very small, and the overflow air volume is also very small. It only has a local cooling effect on the impeller sleeve c1, and the heat dissipation effect on the impeller sleeve c1 and the motor shaft b is very limited.

[0023] like Figure 4 、 5 The figure shows a high-temperature fan equipped with the above-mentioned high-temperature impeller, specifically comprising a motor a, a motor shaft b, a high-temperature impeller c, and a volute d. The volute d further comprises a volute rear disc d3, which is provided with a volute rear hole d4 for the impeller sleeve 5 to pass through. A transverse volute rear disc sleeve 7 is fixedly mounted on the volute rear hole d4. The impeller sleeve 5 passes through the volute rear disc sleeve 7. The inner diameter of the volute rear disc sleeve 7 is larger than the outer diameter of the impeller sleeve 5. A ventilation gap 8 is defined between the volute rear disc sleeve 7 and the impeller sleeve 5. The gap between the rear disc 2 and the volute rear disc d3 is the volute rear gap 9, and the ventilation gap 8 is connected to the volute rear gap 9.

[0024] like Figure 5 The direction indicated by the arrow in the middle is the direction of wind flow, and combined with Figure 4 It can be seen that after the impeller 3 rotates, cold air can enter through the ventilation hole 6 to cool the impeller sleeve 5. Most of the air can be discharged from the volute outlet d2, and a small amount can be discharged along the volute back gap 9 and ventilation gap 8, further removing heat and preventing heat accumulation in the volute back gap 9 and overheating of the impeller sleeve 5. The volute back disc 7 can guide the air to flow along the outer wall of the impeller sleeve 5, so that the impeller sleeve 5 is in a state of wind circulation as a whole, which has a better cooling effect.

[0025] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any person skilled in the art can, without departing from the scope of the present invention, utilize the methods and technical contents disclosed above to make many possible changes and modifications to the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any equivalent changes made based on the shape, structure, and principle of the present application without departing from the content of the present invention should be included in the scope of protection of the present application.

Claims

1. A high-temperature fan with ventilation holes on an impeller sleeve, the fan comprising a motor (a), a motor shaft (b), a high-temperature impeller (c) and a volute (d), wherein the high-temperature impeller (c) comprises a front disc (1), a rear disc (2) and blades (3) fixed between the front disc (1) and the rear disc (2), an impeller air inlet (4) is provided in the middle of the front disc (1), and an impeller sleeve (5) is passed through the middle of the rear disc (2), characterized in that: A ventilation hole (6) that penetrates from front to back is provided on the sleeve wall of the impeller sleeve (5).

2. The high-temperature blower with ventilation holes on the impeller sleeve according to claim 1, characterized in that: A plurality of ventilation holes (6) are provided on the annular wall.

3. The high-temperature blower with ventilation holes on the impeller sleeve according to claim 1, characterized in that: The volute (d) further comprises a volute rear disc (d3), a volute rear disc sleeve (7) is arranged on the volute rear disc (d3), an impeller shaft sleeve (5) is inserted into the volute rear disc sleeve (7), an inner diameter of the volute rear disc sleeve (7) is larger than an outer diameter of the impeller shaft sleeve (5), a ventilation gap (8) is provided between the volute rear disc sleeve (7) and the impeller shaft sleeve (5), a gap between the rear disc (2) and the volute rear disc (d3) is a volute rear gap (9), and the ventilation gap (8) is connected to the volute rear gap (9).

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