Compressor impeller structure for cantilever type centrifugal compressor

Abstract

The utility model is suitable for the technical field of compressor impellers, and provides a compressor impeller structure for a cantilever type centrifugal compressor. An impeller; the main shaft is movably inserted into the middle part of the impeller; the elastic resistance increasing pieces are arranged at the rear end of the impeller in a circumferential array mode and movably abut against the main shaft. The fixing structure is arranged in the middle of the impeller and movably abuts against the interior of the elastic resistance increasing piece. Compared with the prior art, the impeller fixing structure has the advantages that when the impeller fixing structure is used, the fixing structure is arranged in the middle of the impeller, so that the impeller can be quickly fixed on the main shaft, the structure is simple, and the impeller fixing structure is convenient to disassemble and replace in the later period.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor impeller technical field, especially relate to a cantilever type centrifugal compressor compressor impeller structure. BACKGROUND

[0002] Compressor impeller is also called working wheel, and it is an important component on the rotor of centrifugal compressor and is the only element of centrifugal compressor to do work on gas.

[0003] However, when the bolt is connected by inserting, stress fatigue will occur due to long-time operation of the compressor, and deformation will occur, so that the compressor and the main shaft cannot be effectively fixed in the radial direction, and the strength of the main shaft is affected, thereby causing excessive vibration of the impeller.

[0004] Therefore, how to provide a cantilever type centrifugal compressor compressor impeller structure is a problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a cantilever type centrifugal compressor compressor impeller structure, and aims at solving the problems mentioned in the background art.

[0006] The utility model is realized in this way, a cantilever type centrifugal compressor compressor impeller structure, comprising;

[0007] Impeller;

[0008] Main shaft, the main shaft is movably inserted in the middle part of the impeller;

[0009] Elastic resistance increasing piece, the elastic resistance increasing piece is circumferentially arranged at the rear end of the impeller, and is movably abutted with the main shaft;

[0010] Fixing structure, the fixing structure is arranged in the middle part of the impeller, and is movably abutted with the inside of the elastic resistance increasing piece.

[0011] Preferably, the right side of the impeller is provided with a movable groove, and a partition block is circumferentially installed, the elastic resistance increasing piece is arranged in the inside of the movable groove, a positioning ring is fixedly installed at the top of the rear end of the elastic resistance increasing piece, the positioning ring is inlaid on the surface of the partition block, a sealing piece is fixedly installed on the right side of the impeller, and is fixed by a bolt.

[0012] Preferably, the fixing structure comprises a top groove, a positioning groove, a top rod and a positioning piece, the positioning groove is arranged at the left end of the impeller, the top grooves are circumferentially arranged at the middle part right to the positioning groove, the top rod is movably inserted into the inside of the top groove, the positioning piece is movably installed in the inside of the positioning groove, and the inside end of the top rod movably abuts against the elastic resistance piece.

[0013] Preferably, the top rod is integrally arranged in an inclined manner with the left end being higher than the right end, and the inside end of the top rod is arranged in an inclined manner with the left end being lower than the right end.

[0014] Preferably, the elastic resistance piece is a hook-shaped resistance piece, and the bottom of the elastic resistance piece is arranged in an arc shape and has the same curvature as the surface of the main shaft.

[0015] Preferably, the number of the top rods is the same as that of the elastic resistance pieces, and the positions of the top rods correspond to those of the elastic resistance pieces.

[0016] Compared with the prior art, the fixing structure is arranged at the middle part of the impeller, so that the impeller can be quickly fixed on the main shaft, and the structure is simple and convenient to disassemble and replace in the later period.

[0017] The elastic resistance pieces are fixed on a positioning ring, so that when only the elastic resistance pieces have problems, the fixing structure only needs to be disassembled to release the extrusion on the elastic resistance pieces, and then the sealing piece is removed, so that all the elastic resistance pieces can be quickly taken down and replaced, which is simple and fast. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0019] Figure 1 The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0020] Figure 2 The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0021] Figure 3 The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0022] Figure 4 The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings: Figure 2 The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0023] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:Figure 5 The utility model provides an embodiment provides a kind of centrifugal compressor impeller structure for cantilever type centrifugal compressor Figure 3 The structure schematic diagram of B part amplification of

[0024] In the drawing: 1-impeller, 2-main shaft, 3-top groove, 4-positioning groove, 5-movable groove, 6-elastic resistance piece, 7-top rod, 8-positioning piece, 9-sealing piece, 10-separation block, 11-positioning ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0026] The specific implementation of the utility model is described in detail in the following combined with specific embodiments.

[0027] As Figure 1 , Figure 2 , Figure 3 , Figure 4 And Figure 5 As shown in the structure schematic diagram of a kind of centrifugal compressor impeller structure for cantilever type centrifugal compressor provided by an embodiment of the utility model, comprising:

[0028] Impeller 1;

[0029] Main shaft 2, main shaft 2 is movably inserted in the middle of impeller 1;

[0030] Elastic resistance piece 6, elastic resistance piece 6 is circumferentially arrayed at the rear end of impeller 1, and with main shaft 2 movably abuts;

[0031] Fixed structure, fixed structure is set in the middle of impeller 1, and with the inside of elastic resistance piece 6 movably abuts.

[0032] In the embodiment of the utility model, when using, impeller 1 is installed on main shaft 2, then elastic resistance piece 6 is extruded using fixed structure, in turn so that impeller 1 is fixed on main shaft 2;

[0033] By setting fixed structure in the middle of impeller 1, so that impeller 1 can be quickly fixed on main shaft 2, and the structure is simple, convenient to disassemble and replace in later period.

[0034] As Figure 2 , Figure 3 , Figure 4 And Figure 5As shown in the preferred embodiment of the utility model, the right side of the impeller 1 is provided with a movable groove 5, and a partition block 10 is arranged in a circumferential array, the elastic resistance increasing piece 6 is arranged inside the movable groove 5, the top of the rear end of the elastic resistance increasing piece 6 is fixedly provided with a positioning ring 11, the positioning ring 11 is embedded on the surface of the partition block 10, and the right side of the impeller 1 is fixedly provided with a sealing piece 9, which is fixed by bolts.

[0035] In the embodiment of the utility model, when in use, the impeller 1 is placed on the main shaft 2, then the elastic resistance increasing piece 6 on the positioning ring 11 is placed in the movable groove 5 on the rear side of the impeller 1 which is separated by the circumferential array of the partition block 10, then the sealing piece 9 is covered, and fixed by bolts.

[0036] By fixing the elastic resistance increasing piece 6 on a positioning ring 11, when the elastic resistance increasing piece 6 only has problems, the fixed structure can be disassembled, the elastic resistance increasing piece 6 is released from the extrusion, then the sealing piece 9 is removed, and all the elastic resistance increasing pieces 6 can be quickly taken down and replaced, which is simple and fast.

[0037] As shown in the preferred embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the fixed structure comprises a top groove 3, a positioning groove 4, a top rod 7 and a positioning piece 8, the positioning groove 4 is arranged at the left end of the impeller 1, the top groove 3 is arranged in a circumferential array in the middle of the right side of the positioning groove 4, the top rod 7 is movably inserted into the inside of the top groove 3, the positioning piece 8 is movably arranged in the inside of the positioning groove 4, and the inner end of the top rod 7 movably abuts against the elastic resistance increasing piece 6.

[0038] In the embodiment of the utility model, when in use, the top rod 7 is inserted into the top groove 3, and then contacts the inner side of the elastic resistance increasing piece 6, then the positioning piece 8 is arranged in the positioning groove 4, the top rod 7 is extruded, and the right end of the top rod 7 extrudes the elastic resistance increasing piece 6.

[0039] By arranging the fixed structure, the elastic resistance increasing piece 6 can be extruded, the outer surface of the elastic resistance increasing piece 6 contacts the main shaft 2, and the impeller 1 can be fixed on the main shaft 2.

[0040] As shown in the preferred embodiment of the utility model, Figure 2 and Figure 4 , the top rod 7 is arranged in a whole left-high right-low inclination, and the inner end of the top rod 7 is arranged in a left-low right-high manner.

[0041] In the embodiment of the utility model, when in use, the top rod 7 is arranged in a whole left-high right-low inclination, and the inner end of the top rod 7 is arranged in a left-low right-high manner.

[0042] As Figure 2 and Figure 4 shown, as a preferred embodiment of the utility model, the elastic resistance piece 6 is a hook-shaped resistance piece, the bottom of the elastic resistance piece 6 is arc-shaped and has the same curvature as the surface of the main shaft 2.

[0043] In the embodiment of the utility model, when in use, by making the elastic resistance piece 6 a hook-shaped resistance piece and the bottom of the elastic resistance piece 6 arc-shaped and having the same curvature as the surface of the main shaft 2, the elastic resistance piece 6 is more closely attached to the main shaft 2.

[0044] As Figure 2 and Figure 4 shown, as a preferred embodiment of the utility model, the number of the ejector rod 7 is the same as that of the elastic resistance piece 6, and the position of the ejector rod 7 corresponds to that of the elastic resistance piece 6.

[0045] In the embodiment of the utility model, when in use, by making the number of the ejector rod 7 the same as that of the elastic resistance piece 6 and the position of the ejector rod 7 corresponding to that of the elastic resistance piece 6, the ejector rod 7 can extrude the elastic resistance piece 6, so that the elastic resistance piece 6 is more closely attached to the main shaft 2.

[0046] The utility model provides a kind of compressor impeller structure for cantilever centrifugal compressor in the above embodiment of the utility model, when in use, impeller 1 is placed on main shaft 2, then the elastic resistance piece 6 on the positioning ring 11 is placed in the movable groove 5 separated by the spacer 10 circumferential array behind impeller 1, then cover sealing piece 9, and fixed with bolt;

[0047] Then the ejector rod 7 is inserted into the top groove 3, and then contacts the inner side of the elastic resistance piece 6, then the positioning piece 8 is installed in the positioning groove 4, and then the ejector rod 7 is extruded, so that the right end of the ejector rod 7 extrudes the elastic resistance piece 6, so that the outer surface of the elastic resistance piece 6 contacts the main shaft 2, so that the impeller 1 is fixed on the main shaft 2.

[0048] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A compressor impeller structure for a cantilever centrifugal compressor, characterized by, Include; Impeller (1); Main shaft (2), the main shaft (2) is movably inserted in the middle of impeller (1); Elastic resistance piece (6), the elastic resistance piece (6) is circumferentially arranged at the rear end of impeller (1), and is movably abutted with main shaft (2); Fixed structure, the fixed structure is arranged in the middle of impeller (1), and is movably abutted with the inside of elastic resistance piece (6).

2. A cantilever centrifugal compressor impeller structure according to claim 1, characterized by The right side of the impeller (1) is provided with a movable groove (5), and a partition block (10) is circumferentially installed, the elastic resistance piece (6) is arranged in the inside of the movable groove (5), the top of the rear end of the elastic resistance piece (6) is fixedly installed with a positioning ring (11), the positioning ring (11) is inlaid on the surface of the partition block (10), the right side of the impeller (1) is fixedly installed with a sealing piece (9), and is fixed with a bolt.

3. A cantilever centrifugal compressor impeller structure according to claim 1, characterized in that, The fixed structure includes top groove (3), positioning groove (4), top rod (7) and positioning piece (8), the positioning groove (4) is opened in the left end of impeller (1), the top groove (3) is circumferentially opened in the middle of the right side of the positioning groove (4), the top rod (7) is movably inserted in the inside of the top groove (3), the positioning piece (8) is movably installed in the inside of the positioning groove (4), the inner end of the top rod (7) is movably abutted with the elastic resistance piece (6).

4. A cantilever centrifugal compressor impeller structure according to claim 3, characterized by The top rod (7) is inclinedly arranged with the left high and the right low, and the inner end of the top rod (7) is arranged with the left low and the right high.

5. A cantilever centrifugal compressor impeller structure according to claim 1, wherein The elastic resistance piece (6) is a hook-shaped resistance piece, the bottom of the elastic resistance piece (6) is arc-shaped, and the curvature of the surface of the main shaft (2) is the same.

6. A cantilever centrifugal compressor impeller structure according to claim 3, wherein The number of the top rod (7) is the same as that of the elastic resistance piece (6), and the position of the top rod (7) is correspondingly arranged with the position of the elastic resistance piece (6).

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