Impeller adjusting mechanism of centrifugal compressor

Abstract

The utility model discloses an impeller adjusting mechanism of a centrifugal compressor, which belongs to the technical field of centrifugal compressors and comprises a hub and a plurality of groups of blades, the plurality of groups of blades are equidistantly mounted on the surface of the hub, and detachable connecting components are arranged between the blades and the hub. The blades are detachably installed on the surface of the hub through detachable connecting assemblies, and positioning assemblies are arranged on the upper side and the lower side of the hub correspondingly. The hub and the blades of the impeller are designed in a split mode, the distance and the number of the blades on the surface of the hub can be adjusted, the blades are installed on the surface of the hub through the detachable connecting assembly, and then the blades are fixed to the hub through the positioning assembly. Compared with the prior art, the distance between the blades on the surface of the hub and the number of the blades can be adjusted so as to adapt to different fluid speed requirements, and compared with the prior art, the impeller has the advantage that the number and the distance of the blades can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal compressors, in particular to an impeller regulating mechanism of a centrifugal compressor. Background Art

[0002] Centrifugal compressors are widely used in power devices and fluid transportation devices such as internal combustion engine turbochargers, aviation turbine engines, micro gas turbines, fuel cell engines, closed-cycle turbine power, industrial compressors, etc. due to their advantages of small size, light weight and high efficiency. Centrifugal compressors used in power devices generally use semi-open impellers.

[0003] A Chinese patent with authorization (announcement) number CN113202789B discloses an impeller for a centrifugal compressor and a centrifugal compressor. The impeller includes a hub and blades. Each blade includes a blade body and a tip winglet, and the tip winglet is arranged in the area near the leading edge tip of the top of the blade body. The tip winglet extends toward the pressure side and the suction side of the blade body. In this way, on the one hand, by using the tip winglet, the generation of tip leakage vortex at the leading edge of the high-speed centrifugal impeller can be suppressed or even eliminated, the tip leakage loss can be reduced, and the aerodynamic performance of the centrifugal compressor can be improved. On the other hand, since the tip winglet is only arranged in the area near the leading edge tip of the blade, that is, in the low linear speed area of ​​the blade, the adverse effect of the tip winglet on the structural stress of the blade is significantly reduced.

[0004] The impeller for the centrifugal compressor involved in the above patent has a fixed arrangement between the blades and the hub, and the blade spacing and the number of blades are not adjustable. The blade spacing and the number of blades are important factors affecting the fluid velocity, so we need to propose an impeller adjustment mechanism for the centrifugal compressor. Utility Model Content

[0005] The purpose of the utility model is to provide an impeller adjustment mechanism for a centrifugal compressor, which has the advantage of being able to adjust the number of blades and the distance between blades on the impeller, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides an impeller adjustment mechanism for a centrifugal compressor, comprising a hub and blades, wherein the blades are provided in multiple groups, and the multiple groups of blades are equidistantly installed on the surface of the hub, a detachable connecting component is provided between the blades and the hub, and the blades are detachably installed on the surface of the hub through the detachable connecting component, positioning components are provided on the upper and lower sides of the hub, and the blades are fixed to the surface of the hub through the positioning component, and a connecting hole is opened on the surface of the hub, and the connecting hole is connected to the main shaft key of the centrifugal compressor through a key connecting component.

[0007] Preferably, the detachable connecting assembly includes a T-shaped clip fixedly mounted on the side of the blade close to the hub, and a plurality of groups of T-shaped slots matching the T-shaped clip are equidistantly provided on the surface of the hub, and the surface of the T-shaped clip is clamped and fixed to the inner wall of the corresponding T-shaped slot.

[0008] Preferably, the positioning assembly includes a first positioning plate and a second positioning plate respectively arranged on the upper and lower sides of the wheel hub, the bottom of the first positioning plate and the top of the second positioning plate are respectively fitted with the upper and lower sides of the wheel hub, and the first positioning plate and the second positioning plate are both provided with threaded connection assemblies with the upper and lower sides of the wheel hub.

[0009] Preferably, the threaded connection assembly includes a threaded tube fixedly mounted on the bottom of the first positioning plate and the top of the second positioning plate, and threaded grooves matching the threaded tube are provided on the upper and lower sides of the hub, and the surface of the threaded tube is threadedly connected to the inner wall of the threaded groove.

[0010] Preferably, a plurality of groups of grooves are provided on the top of the first positioning plate and the bottom of the second positioning plate, and the plurality of groups of grooves are symmetrically arranged in pairs.

[0011] Preferably, the surfaces of the first positioning plate and the second positioning plate are both provided with through holes adapted to the main shaft of the centrifugal compressor, and one end of the main shaft of the centrifugal compressor is slidably plugged into the inner cavity of the through hole.

[0012] Preferably, the key connection assembly includes key slots opened on both sides of the inner cavity of the connection hole, and key connection blocks adapted to the key slots are integrally installed on both sides of the main shaft of the centrifugal compressor, and the surface of the key connection block is engaged with the inner wall of the key slot.

[0013] Preferably, a connecting plate is further installed at one end of the main shaft of the centrifugal compressor, a positioning hole is provided on the surface of the connecting plate, and a threaded hole corresponding to the positioning hole is provided on the top of the hub.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The hub and blades of the impeller in the utility model are of split design, the spacing and number of the blades on the surface of the hub are adjustable, and the blades are mounted on the surface of the hub by a detachable connecting assembly, and then the blades are fixed to the hub by a positioning assembly. Through the setting of the device, the spacing between the blades on the surface of the hub and the number of blades can be adjusted to meet different fluid speed requirements. Compared with the prior art, the impeller in the device has the advantages of adjustable blade number and blade spacing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the key connection assembly of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the positioning component of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the detachable connection component of the utility model.

[0020] In the figure: 1. hub; 2. blade; 3. connecting hole; 4. T-shaped clamping plate; 5. T-shaped clamping slot; 6. first positioning plate; 7. second positioning plate; 8. threaded tube; 9. threaded groove; 10. groove; 11. through hole; 12. keyway; 13. key connecting block; 14. connecting plate; 15. positioning hole; 16. threaded hole; 17. main shaft of centrifugal compressor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 The utility model provides an impeller adjustment mechanism of a centrifugal compressor, including a hub 1 and blades 2. The blades 2 are provided with multiple groups, and the multiple groups of blades 2 are equidistantly installed on the surface of the hub 1. A detachable connecting component is provided between the blades 2 and the hub 1. The blades 2 are detachably installed on the surface of the hub 1 through the detachable connecting component. The detachable connecting component includes a T-shaped clamping plate 4 fixedly installed on a side of the blade 2 close to the hub 1. The surface of the hub 1 is equidistantly provided with a plurality of groups of T-shaped clamping grooves 5 adapted to the T-shaped clamping plate 4. The surface of the T-shaped clamping plate 4 is clamped and fixed with the inner wall of the corresponding T-shaped clamping groove 5.

[0023] By setting a detachable connecting component, the blade 2 can be detachably installed on the surface of the hub 1. The number of blades 2 and the spacing between the blades 2 in this embodiment are adjustable, and are adjusted according to the fluid flow rate requirements. When installing the blade 2, the user can insert the T-shaped clip 4 on one side of the blade 2 into the inner cavity of the T-shaped slot 5 on the surface of the hub 1 to install the blade 2 on the hub 1.

[0024] Preferably, positioning assemblies are provided on the upper and lower sides of the hub 1, and the blades 2 are fixed to the surface of the hub 1 through the positioning assemblies. The positioning assemblies include a first positioning plate 6 and a second positioning plate 7 respectively provided on the upper and lower sides of the hub 1, and the bottom of the first positioning plate 6 and the top of the second positioning plate 7 are respectively fitted with the upper and lower sides of the hub 1. The first positioning plate 6 and the second positioning plate 7 are provided with threaded connection assemblies on the upper and lower sides of the hub 1, and the threaded connection assemblies include a threaded tube 8 fixedly installed on the bottom of the first positioning plate 6 and the top of the second positioning plate 7. Threaded grooves 9 matching the threaded tube 8 are provided on the upper and lower sides of the hub 1, and the surface of the threaded tube 8 is threadedly connected to the inner wall of the threaded groove 9.

[0025] After installing the blade 2 on the surface of the hub 1, the user can install the first positioning plate 6 and the second positioning plate 7 on the upper and lower sides of the hub 1 respectively through the threaded connection assembly to fix the T-shaped clamping plate 4 in the inner cavity of the T-shaped clamping groove 5, and then install and fix the blade 2 on the surface of the hub 1. When installing the first positioning plate 6 and the second positioning plate 7, the user can rotate the first positioning plate 6 and the second positioning plate 7 to tighten the threaded tube 8 on their surface into the inner cavity of the threaded groove 9.

[0026] Among them, the top of the first positioning plate 6 and the bottom of the second positioning plate 7 are each provided with a plurality of groups of grooves 10, and the plurality of groups of grooves 10 are symmetrically arranged in pairs. The surfaces of the first positioning plate 6 and the second positioning plate 7 are each provided with a through hole 11 adapted to the main shaft 17 of the centrifugal compressor, and one end of the main shaft 17 of the centrifugal compressor is slidably plugged into the inner cavity of the through hole 11.

[0027] Through the setting of the groove 10, it is convenient for the user to rotate the first positioning plate 6 and the second positioning plate 7 by means of a tool so as to tighten the threaded tube 8 on the surface thereof into the inner cavity of the threaded groove 9. Through the setting of the through hole 11, it is convenient to install the impeller on the main shaft 17 of the centrifugal compressor, thereby providing an insertion installation space for the main shaft 17 of the centrifugal compressor.

[0028] It is worth noting that a connection hole 3 is provided on the surface of the hub 1, and the connection hole 3 is key-connected with the main shaft 17 of the centrifugal compressor through a key connection assembly, and the key connection assembly includes key slots 12 provided on both sides of the inner cavity of the connection hole 3, and key connection blocks 13 adapted to the key slots 12 are integrally installed on both sides of the main shaft 17 of the centrifugal compressor, and the surface of the key connection block 13 is engaged with the inner wall of the key slot 12. A connection plate 14 is also installed at one end of the main shaft 17 of the centrifugal compressor, and a positioning hole 15 is provided on the surface of the connection plate 14, and a threaded hole 16 corresponding to the positioning hole 15 is provided on the top of the hub 1.

[0029] Through the setting of the key connection assembly, when installing the impeller, the user can insert the hub 1 behind the adjusting blades 2 into the surface of the main shaft 17 of the centrifugal compressor through the connecting hole 3 on its surface, and when the key connection block 13 on the surface of the main shaft 17 of the centrifugal compressor is inserted into the inner cavity of the key slot 12 inside the connecting hole 3 and stops moving, at this time, the bottom of the connecting plate 14 will fit against the top of the hub 1, and the user can insert the bolt through the positioning hole 15 and tighten it in the inner cavity of the threaded hole 16 to lock and fix the connecting plate 14 on the surface of the hub 1, and it can be used in conjunction with the key connection assembly to stably install the impeller on the main shaft 17 of the centrifugal compressor.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impeller adjustment mechanism for a centrifugal compressor, comprising a hub (1) and blades (2), characterized in that: The blades (2) are provided in a plurality of groups, and the plurality of groups of blades (2) are equidistantly mounted on the surface of the hub (1); a detachable connection assembly is provided between the blades (2) and the hub (1); the blades (2) are detachably mounted on the surface of the hub (1) via the detachable connection assembly; positioning assemblies are provided on both upper and lower sides of the hub (1); the blades (2) are fixed to the surface of the hub (1) via the positioning assemblies; a connection hole (3) is provided on the surface of the hub (1); the connection hole (3) is key-connected to a main shaft (17) of a centrifugal compressor via a key connection assembly.

2. The impeller adjustment mechanism of a centrifugal compressor according to claim 1, characterized in that: The detachable connection assembly comprises a T-shaped clamping plate (4) fixedly mounted on a side of the blade (2) close to the hub (1); a plurality of groups of T-shaped clamping grooves (5) matching the T-shaped clamping plate (4) are equidistantly provided on the surface of the hub (1); the surface of the T-shaped clamping plate (4) is clamped and fixed to the inner wall of the corresponding T-shaped clamping groove (5).

3. The impeller adjustment mechanism of a centrifugal compressor according to claim 1, characterized in that: The positioning assembly comprises a first positioning plate (6) and a second positioning plate (7) respectively arranged on the upper and lower sides of the wheel hub (1); the bottom of the first positioning plate (6) and the top of the second positioning plate (7) are respectively in contact with the upper and lower sides of the wheel hub (1); and the first positioning plate (6) and the second positioning plate (7) are both provided with threaded connection assemblies on the upper and lower sides of the wheel hub (1).

4. The impeller adjustment mechanism of a centrifugal compressor according to claim 3, characterized in that: The threaded connection assembly comprises a threaded tube (8) fixedly mounted on the bottom of the first positioning plate (6) and the top of the second positioning plate (7); threaded grooves (9) matching the threaded tube (8) are provided on the upper and lower sides of the wheel hub (1); and the surface of the threaded tube (8) is threadedly connected to the inner wall of the threaded groove (9).

5. The impeller adjustment mechanism of a centrifugal compressor according to claim 3, characterized in that: A plurality of groups of grooves (10) are provided on the top of the first positioning plate (6) and the bottom of the second positioning plate (7), and the plurality of groups of grooves (10) are symmetrically arranged in pairs.

6. The impeller adjustment mechanism of a centrifugal compressor according to claim 3, characterized in that: The surfaces of the first positioning plate (6) and the second positioning plate (7) are both provided with a through hole (11) adapted to the main shaft (17) of the centrifugal compressor, and one end of the main shaft (17) of the centrifugal compressor is slidably plugged into the inner cavity of the through hole (11).

7. The impeller adjustment mechanism of a centrifugal compressor according to claim 1, characterized in that: The key connection assembly comprises keyways (12) provided on both sides of the inner cavity of the connection hole (3); key connection blocks (13) adapted to the keyways (12) are integrally mounted on both sides of the main shaft (17) of the centrifugal compressor; and the surface of the key connection block (13) is snap-fitted to the inner wall of the keyway (12).

8. The impeller adjustment mechanism of a centrifugal compressor according to claim 1, characterized in that: A connecting plate (14) is also installed at one end of the main shaft (17) of the centrifugal compressor, a positioning hole (15) is provided on the surface of the connecting plate (14), and a threaded hole (16) corresponding to the positioning hole (15) is provided on the top of the hub (1).

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