Impeller sealing device

Abstract

An impeller sealing device is composed of a cover plate, pressing plates, a rubber ring, an annular sealing groove and screws, a blade nest is welded to a hub, a blade tray is arranged in the blade nest, a blade shaft is arranged below the blade tray, a blade seat is arranged below blades, and an adjusting arm is installed on the blade shaft. The blade seat is connected with the blade tray through a pressing plate and a bolt, a cover plate is arranged on the pressing plate, and the cover plate is fixed on the pressing plate through a screw; an annular sealing groove is formed in the hub, a rubber ring is arranged in the annular sealing groove and is higher than the surface of the hub, a cover plate is pressed on the rubber ring, and a gap between the blade seat and the blade nest is sealed by the rubber ring; the utility model has the beneficial effects that dust and water vapor in a mine can be blocked outside the rubber ring, the gap between the blade seat and the blade nest cannot be blocked by impurities, the condition that the angle of the blade cannot be adjusted is avoided, and safety and reliability are realized.

Description

Technical Field

[0001] This utility model relates to an impeller sealing device. Background Technology

[0002] The blade angle of the impeller of the main fan in the mine can be adjusted by adjusting the blade angle through the adjusting arm. However, because the medium pumped out of the mine contains a lot of water vapor, impurities and dust, the gap between the blade seat and the blade socket is often blocked by impurities, resulting in the blade angle being unable to be adjusted. During maintenance, the blade can only be removed and the impurities between the blade seat and the blade socket cleaned before adjustment can continue. The maintenance work is troublesome, labor-intensive, time-consuming and unsafe. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an impeller sealing device that does not require the removal of blades.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An impeller sealing device comprises a cover plate, a pressure plate, a rubber ring, an annular sealing groove, and screws. A blade recess is welded onto the hub, a blade tray is located within the blade recess, a blade shaft is located below the blade tray, a blade seat is located below the blade, and an adjusting arm is mounted on the blade shaft. The device is characterized in that: the blade seat has two crescent-shaped pressure plates, and the blade seat is connected to the blade tray via the pressure plates and bolts; a cover plate is located on the pressure plate, and the cover plate is fixed to the pressure plate with screws; the hub has an annular sealing groove, within which is a rubber ring, which protrudes above the hub surface; a cover plate is pressed onto the rubber ring, and the gap between the blade seat and the blade recess is sealed by the rubber ring.

[0006] The advantages of this invention compared to the prior art are: this invention can block mine dust and water vapor outside the rubber ring, the gap between the blade seat and the blade socket will not be blocked by impurities, and there will be no situation where the blade angle cannot be adjusted, making it safe and reliable. Attached Figure Description

[0007] Figure 1 This is a structural diagram of existing technology;

[0008] Figure 2 It is attached Figure 1 Top view;

[0009] Figure 3 This is a structural schematic diagram of an embodiment of the present utility model;

[0010] Figure 4 It is attached Figure 3 Top view;

[0011] Figure 5 This is a schematic diagram of two crescent-shaped pressure plates 2;

[0012] Figure 6 This is a schematic diagram of the structure of cover plate 1;

[0013] Figure 7 This is a schematic diagram of the structure of rubber ring 3;

[0014] Figure 8 This is a schematic diagram of the structure of blade 5 and blade seat 14;

[0015] Figure 9 This is a schematic diagram of the structure of the blade tray 15 and the blade shaft 7;

[0016] Figure 10 This is a schematic diagram of the side profile of the hub 6 with the blade socket 12 welded on it.

[0017] Symbol descriptions: 1. Pressure plate; 2. Cover plate; 3. Rubber ring; 5. Blade; 6. Hub; 7. Blade shaft; 8. Gasket; 9. Adjusting arm; 10. Spring washer; 11. Adjusting disc; 12. Blade recess; 13. Bolt; 14. Blade seat; 15. Blade tray; 16. Annular sealing groove; 17. Screw. Detailed Implementation

[0018] Figure 1 This is a structural diagram of existing technology. Figure 2 It is attached Figure 1 A top view; the existing technology has blade recesses 12 welded onto the hub 6. Figure 10 This is a side-section diagram of the hub 6 with blade recesses 12 welded on it. Inside the blade recess 12 is a blade tray 15, below which is a blade shaft 7. Below the blade 5 is a blade seat 14. An adjusting arm 9 is mounted on the blade shaft 7. The blade 5 and blade shaft 7 are connected to an adjusting disc 11 via the adjusting arm 9. The axial movement of the adjusting disc 11 drives the adjusting arm 9 to rotate, thus rotating the blade 5 to adjust its angle. Because there is a gap between the blade seat 14 and the blade recess 12, dust and moisture drawn out by the fan can clog this gap, making blade angle adjustment difficult. Cleaning requires removing the blades, which is cumbersome, labor-intensive, and time-consuming. It also easily damages the blade recess 12 and the blade seat 14, posing a safety hazard.

[0019] Example

[0020] Figure 3 This is a structural schematic diagram of an embodiment of the present utility model. Figure 4 It is attached Figure 3 A top view; This utility model discloses an impeller sealing device, comprising a cover plate 1, a pressure plate 2, a rubber ring 3, an annular sealing groove 16, and screws 17. A blade recess 12 is welded onto the hub 6, a blade tray 15 is located within the blade recess 12, a blade shaft 7 is located below the blade tray 15, and a blade seat 14 is located below the blade 5. Figure 8This is a schematic diagram of the structure of blade 5 and blade seat 14. An adjusting arm 9 is mounted on the blade shaft 7. The blade seat 14 has two crescent-shaped pressure plates 2. Figure 5 This is a schematic diagram of two crescent-shaped pressure plates 2; the blade seat 14 is connected to the blade tray 15 via the pressure plates 2 and bolts 13, and the pressure plates 2 have a cover plate 1. Figure 6 This is a structural schematic diagram of cover plate 1; cover plate 1 is fixed to pressure plate 2 with screws 17; the hub 6 has an annular sealing groove 16, and a rubber ring 3 is placed inside the annular sealing groove 16. Figure 7 This is a schematic diagram of the structure of the rubber ring 3. The rubber ring 3 is higher than the surface of the hub 6, and a cover plate 1 is pressed on the rubber ring 3; in this way, the gap between the blade seat 14 and the blade socket 12 is sealed by the rubber ring 3.

[0021] This invention can block mine dust and water vapor outside the rubber ring, and the gap between the blade seat and the blade socket will not be blocked by impurities, so there will be no situation where the blade angle cannot be adjusted, making it safe and reliable.

Claims

1. An impeller sealing device, comprising a cover plate, a pressure plate, a rubber ring, an annular sealing groove, and screws, wherein a blade recess is welded onto the hub, a blade tray is located within the blade recess, a blade shaft is located below the blade tray, a blade seat is located below the blade, and an adjusting arm is mounted on the blade shaft, characterized in that: The blade seat has two crescent-shaped pressure plates. The blade seat is connected to the blade tray by the pressure plates and bolts. There is a cover plate on the pressure plate, and the cover plate is fixed to the pressure plate with screws. The hub has an annular sealing groove with a rubber ring inside. The rubber ring is higher than the surface of the hub, and a cover plate is pressed on the rubber ring. The gap between the blade seat and the blade socket is sealed by the rubber ring.

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