Centrifugal radial turbine with blade top bearing

Abstract

The centrifugal radial turbine comprises a shell, a cavity is formed in the shell, a rotating shaft is rotatably connected in the cavity, an open groove is formed in one end of the outer surface of the shell, one end of the rotating shaft penetrates through the open groove and is rotatably connected with a sealing assembly, and the other end of the rotating shaft is rotatably connected with the blade top bearing. The sealing assembly comprises a mounting frame fixedly mounted at one end of the outer surface of the shell, a sealing groove is formed in the inner surface of the mounting frame, sealing gaskets are symmetrically arranged at the two ends, away from the sealing groove, of the inner surface of the mounting frame, and an air inlet is formed in one end of the outer surface of the mounting frame. Sealing gas is injected into the sealing groove, so that a gas working medium can be isolated from the outside, the gas working medium is effectively prevented from leaking outwards, meanwhile, external gas is prevented from entering the shell to pollute components in the shell, and normal use of the centrifugal radial turbine is prevented from being affected.

Description

Technical Field

[0001] This utility model relates to a centrifugal radial turbine, specifically, to a centrifugal radial turbine with a blade top bearing. Background Technology

[0002] Centrifugal radial turbines are a newly developed type of small-to-medium-sized thermal power generator, commonly used for waste heat power generation, geothermal power generation, and solar power generation. Centrifugal radial turbines have a simple structure and use straight blades, allowing the unit to achieve high efficiency at optimal speed ratio and reaction degree.

[0003] Currently, the casing of a centrifugal radial turbine is used to contain a gaseous working medium. The flowing gaseous working medium can drive the impeller to rotate, which in turn drives the shaft to rotate, thus outputting mechanical work. However, the gaseous working medium is very prone to leakage to the outside, and external gases can also easily enter the casing, thereby contaminating the components inside the casing and affecting the normal use of the centrifugal radial turbine.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a centrifugal radial turbine with blade top bearing to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A centrifugal radial turbine with a blade top bearing includes a housing with an internal cavity. A rotating shaft is rotatably connected within the cavity, and an impeller is fixedly connected to the rotating shaft. An opening groove is formed on one end of the outer surface of the housing, communicating with the cavity. One end of the rotating shaft passes through the opening groove and is rotatably connected to a sealing assembly. The sealing assembly includes a mounting bracket fixedly mounted on one end of the outer surface of the housing. A sealing groove is formed on the inner surface of the mounting bracket, and sealing gaskets are symmetrically arranged at both ends of the inner surface of the mounting bracket away from the sealing groove. An air inlet is formed on one end of the outer surface of the mounting bracket, communicating with the sealing groove, and an air inlet plug is threadedly connected to the air inlet. An air outlet is formed on the other end of the outer surface of the mounting bracket, communicating with the sealing groove, and an air outlet plug is threadedly connected to the air outlet.

[0008] Furthermore, in order to fix the mounting bracket to the housing, a fixing plate is fixedly connected to the other end of the outer surface of the mounting bracket, and fastening bolts are threaded at equal intervals on the fixing plate. Threaded holes are equally spaced on one end of the outer surface of the housing away from the opening slot, and the threaded holes match the fastening bolts.

[0009] Furthermore, in order to increase the sealing between the mounting bracket and the housing, a protrusion is provided between the opening groove and the threaded hole. The protrusion is fixedly connected to the outside of the housing. A groove is provided on the other end of the outer surface of the mounting bracket away from the fixing plate. The groove matches the protrusion.

[0010] Furthermore, in order to increase the sealing between the groove and the protrusion, a rubber gasket is provided between the groove and the protrusion, and the rubber gasket is fixedly installed in the groove.

[0011] Furthermore, to facilitate the operation of the working machine, the other end of the rotating shaft extends outside the housing and is connected to the output end of the working machine via a coupling.

[0012] Furthermore, in order to facilitate the attenuation of the flow rate and pressure of the gaseous working fluid leakage inside the housing, a sealing ring is provided between the opening groove and the rotating shaft, and the outer surface of the sealing ring is fixedly installed on the inner wall of the opening groove.

[0013] Furthermore, in order to reduce the leakage of the gaseous working fluid, comb teeth are evenly spaced on the inner surface of the sealing ring.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The outlet is blocked by the outlet pipe plug, and sealing gas is injected into the sealing groove through the inlet. With the help of the sealing gasket, the sealing groove is sealed. After the sealing gas is injected, the inlet pipe plug is blocked. By injecting sealing gas into the sealing groove, the gas working medium is isolated from the outside, effectively preventing the gas working medium from leaking out. At the same time, it prevents the outside gas from entering the shell and contaminating the components inside the shell, thus avoiding affecting the normal use of the centrifugal radial turbine. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a centrifugal radial turbine with a bladed top bearing according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the unfolded structure of a centrifugal radial turbine with a bladed top bearing according to an embodiment of the present utility model.

[0019] Figure 3 This is a cross-sectional view of the housing of a centrifugal radial turbine with a bladed top bearing according to an embodiment of the present utility model;

[0020] Figure 4 This is a top sectional view of the mounting bracket in a centrifugal radial turbine with a bladed top bearing, according to an embodiment of the present invention.

[0021] In the picture:

[0022] 1. Housing; 2. Cavity; 3. Shaft; 4. Impeller; 5. Coupling; 6. Working machine; 7. Opening groove; 8. Sealing ring; 9. Comb teeth; 10. Protrusion; 11. Threaded hole; 12. Mounting bracket; 13. Fixing plate; 14. Fastening bolt; 15. Groove; 16. Rubber gasket; 17. Sealing groove; 18. Air inlet; 19. Air inlet pipe plug; 20. Air outlet; 21. Air outlet pipe plug; 22. Sealing gasket. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] According to an embodiment of the present invention, a centrifugal radial turbine with a blade top bearing is provided.

[0025] Example 1;

[0026] like Figures 1-4As shown, the shockproof high-voltage distribution cabinet according to an embodiment of the present invention includes a housing 1, with a cavity 2 inside the housing 1 for containing a gaseous working fluid. A rotating shaft 3 is rotatably connected inside the cavity 2, and an impeller 4 is fixedly connected to the rotating shaft 3. An opening groove 7 is formed on one end of the outer surface of the housing 1, communicating with the cavity 2. One end of the rotating shaft 3 passes through the opening groove 7 and is rotatably connected to a sealing assembly. A sealing ring 8 is provided between the opening groove 7 and the rotating shaft 3, with the outer surface of the sealing ring 8 fixedly installed on the inner wall of the opening groove 7. The rotating shaft 3 and the sealing ring 8 are rotatably engaged, and the sealing ring 8 is used to attenuate gaseous working fluid leakage. To reduce leakage flow and pressure, comb teeth 9 are evenly spaced on the inner surface of the sealing ring 8. Multiple comb teeth 9 are used to attenuate the leakage of the gaseous working medium. The sealing assembly includes a mounting bracket 12 fixedly mounted on one end of the outer surface of the housing 1. A sealing groove 17 is formed on the inner surface of the mounting bracket 12. Sealing gaskets 22 are symmetrically arranged at both ends of the inner surface of the mounting bracket 12 away from the sealing groove 17. The sealing gaskets 22 are graphite rings, which have high hardness and strong wear and impact resistance. The sealing gasket 22 at the end away from the sealing groove 17 is used to isolate the sealing groove 17 from the cavity 2, thereby attenuating the leakage flow and pressure of the gaseous working medium. A sealing gasket 22 at the other end of the sealing groove 17 is used to isolate the sealing groove 17 from the external environment to prevent the sealing gas from contacting the external gas. The pressure of the sealing gas in the sealing groove 17 is greater than the external pressure. The sealing gas can be a protective gas such as nitrogen or helium. The sealing gas does not chemically react with the external air or the working gas. An air inlet 18 is provided on one end of the outer surface of the mounting bracket 12, which communicates with the sealing groove 17. An air inlet plug 19 is threaded onto the air inlet 18. An air outlet 20 is provided on the other end of the outer surface of the mounting bracket 12, which communicates with the sealing groove 17. An outlet plug 21 is threaded onto the outlet 20. The outlet 20 is sealed by the outlet plug 21, and sealing gas is injected into the sealing groove 17 through the inlet 18. Under the action of the sealing gasket 22, the sealing performance of the sealing groove 17 is ensured. After the sealing gas is injected, the inlet plug 19 is used to seal the inlet 18. By injecting sealing gas into the sealing groove 17, the working gas can be isolated from the outside, effectively preventing the working gas from leaking out. At the same time, it prevents the outside gas from entering the housing 1 and contaminating the components inside the housing 1, thus avoiding affecting the normal operation of the centrifugal radial turbine.

[0027] Example 2;

[0028] Please see Figures 1-4To ensure the mounting bracket 12 is fixedly mounted on the housing 1, a fixing plate 13 is fixedly connected to the other end of the outer surface of the mounting bracket 12. Fastening bolts 14 are threaded at equal intervals on the fixing plate 13. Threaded holes 11 are equally spaced on one end of the outer surface of the housing 1 away from the opening slot 7. The threaded holes 11 match the fastening bolts 14. A protrusion 10 is provided between the opening slot 7 and the threaded hole 11. The protrusion 10 is fixedly connected to the outside of the housing 1. A groove 15 is provided on the other end of the outer surface of the mounting bracket 12 away from the fixing plate 13. The groove 15 matches the protrusion 10. A rubber gasket 16 is provided between the groove 15 and the protrusion 10. The rubber gasket 16 is fixedly installed in the groove 15. The other end of the rotating shaft 3 extends to the outside of the housing 1 and is connected to the output end of the working machine 6 through the coupling 5. The gas working fluid flowing inside the housing 1 can drive the impeller 4 to rotate. The rotation of the impeller 4 drives the rotating shaft 3 to rotate, and causes the working machine 6 to rotate and work, so as to output mechanical work.

[0029] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0030] In practical applications, firstly, the outlet 20 is blocked by the outlet pipe plug 21. Secondly, sealing gas is injected into the sealing groove 17 through the inlet 18. Under the action of the sealing gasket 22, the sealing performance of the sealing groove 17 is ensured. After the sealing gas is injected, the inlet pipe plug 19 is then used to block the inlet 18. By injecting sealing gas into the sealing groove 17, the gas working medium can be isolated from the outside, effectively preventing the gas working medium from leaking outward. At the same time, it prevents external gas from entering the housing 1 and contaminating the components inside the housing 1, thus avoiding affecting the normal operation of the centrifugal radial turbine. The gas working medium flowing inside the housing 1 can drive the impeller 4 to rotate. The rotation of the impeller 4 drives the shaft 3 to rotate, and causes the working machine 6 to rotate and work, so as to output mechanical work.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centrifugal radial turbomachine with blade tip bearing, comprising a casing (1), characterized in that, The shell (1) is internally provided with a cavity (2), the cavity (2) is rotatably connected with a rotating shaft (3), the rotating shaft (3) is fixedly connected with an impeller (4), one end of the outer surface of the shell (1) is provided with an open slot (7), the open slot (7) is communicated with the cavity (2), one end of the rotating shaft (3) passes through the open slot (7) and is rotatably connected with a sealing assembly, the sealing assembly comprises a mounting bracket (12) fixedly installed on one end of the outer surface of the shell (1), the inner surface of the mounting bracket (12) is provided with a sealing groove (17), the two ends of the inner surface of the mounting bracket (12) away from the sealing groove (17) are symmetrically provided with sealing gaskets (22), one end of the outer surface of the mounting bracket (12) is provided with an air inlet (18), the air inlet (18) is communicated with the sealing groove (17), the air inlet (18) is threadedly connected with an air inlet pipe plug (19), the other end of the outer surface of the mounting bracket (12) is provided with an air outlet (20), the air outlet (20) is communicated with the sealing groove (17), the air outlet (20) is threadedly connected with an air outlet pipe plug (21).

2. A centrifugal radial turbine according to claim 1, characterized in that The other end of the outer surface of the mounting bracket (12) is fixedly connected with a fixed plate (13), the fixed plate (13) is threadedly connected with a fastening bolt (14) at equal distances, one end of the outer surface of the shell (1) away from the open slot (7) is provided with a threaded hole (11) at equal distances, and the threaded hole (11) is matched with the fastening bolt (14).

3. A centrifugal radial turbine according to claim 2, characterized in that The open slot (7) and the threaded hole (11) are provided with a protruding piece (10), the protruding piece (10) is fixedly connected outside the shell (1), the other end of the outer surface of the mounting bracket (12) away from the fixed plate (13) is provided with a groove (15), and the groove (15) is matched with the protruding piece (10).

4. A centrifugal radial turbine according to claim 3, characterized in that The groove (15) and the protruding piece (10) are provided with a rubber gasket (16), and the rubber gasket (16) is fixedly installed in the groove (15).

5. A centrifugal radial turbine according to claim 1, characterized in that The other end of the rotating shaft (3) extends to the outside of the shell (1) and is connected with the output end of a working machine (6) through a shaft coupling (5).

6. A centrifugal radial turbine according to claim 1, characterized in that The open slot (7) and the rotating shaft (3) are provided with a sealing ring (8), and the outer surface of the sealing ring (8) is fixedly installed on the inner wall of the open slot (7).

7. A centrifugal radial turbine with blade tip bearing according to claim 6, characterized in that The inner surface of the sealing ring (8) is provided with a comb tooth (9) at equal distances.

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