A rotor assembly having a dynamic balance correction assembly and an air compressor

Abstract

The utility model provides a rotor subassembly and air compressor with dynamic balance correction subassembly, rotor subassembly includes: impeller, rotating shaft, dynamic balance correction spare one and two, dynamic balance correction spare one and the axial one end of impeller are connected, to can correct the axial one end of impeller, and dynamic balance correction spare two and the axial other end of impeller are connected, to can correct the axial other end of impeller, in the correction process, impeller and rotating shaft are separated and corrected alone, impeller is corrected by dynamic balance correction spare one and dynamic balance correction spare two, and rotating shaft is corrected alone, and after respectively correcting impeller and rotating shaft, again assemble impeller and rotating shaft as a whole. According to the utility model can realize the separate processing to the unbalance amount source, need not to re-dynamic balance correction to another component when replacing component, solve the unbalance amount source of the impeller and the rotor of air compressor in prior art has not been completely eliminated, still can excite during the actual operation of air compressor, lead to the problem of poor rotor operation precision.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, specifically to a rotor assembly with dynamic balancing correction components and an air compressor. Background Technology

[0002] In an air compressor, the motor rotor and impeller are crucial components. The air compressor needs to transmit torque to the impeller through the rotor so that it can continuously perform work on the air and compress it as it rotates. However, due to the presence of pneumatic components, this type of rotor cannot be dynamically balanced online. It must be dynamically balanced offline before being assembled into the air compressor.

[0003] In the existing technology, the impeller and rotor are both rotating components. When the rotor is dynamically balanced, the impeller and rotor are assembled as one unit by tightening screws and then balanced together. However, this operation has the following hidden dangers: the sources of imbalance between the impeller and rotor may affect and couple with each other after assembly. Even if the overall dynamic balance is corrected, the actual sources of imbalance are not completely eliminated and will still be triggered during the actual operation of the air compressor, resulting in poor rotor running accuracy.

[0004] Because the sources of imbalance between the impeller and rotor in existing air compressors have not been completely eliminated, and can still be generated during actual operation of the air compressor, resulting in poor rotor running accuracy and other technical problems, this utility model studies and designs a rotor assembly and an air compressor with a dynamic balancing correction component. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the defect in the existing air compressor where the source of the imbalance between the impeller and the rotor is not completely eliminated and will still be triggered during the actual operation of the air compressor, resulting in poor rotor running accuracy. Thus, a rotor assembly and an air compressor with a dynamic balance correction component are provided.

[0006] To address the aforementioned problems, this utility model provides a rotor assembly with a dynamic balancing correction component, comprising: The impeller, shaft, dynamic balancing component one, and dynamic balancing component two are provided. Dynamic balancing component one is connected to one axial end of the impeller to calibrate that axial end, and dynamic balancing component two is connected to the other axial end of the impeller to calibrate that other axial end. During the calibration process, the impeller and the shaft are calibrated separately. The impeller is calibrated by the first dynamic balancing component and the second dynamic balancing component, and the shaft is calibrated separately. After the impeller and the shaft are calibrated separately, the impeller and the shaft are then assembled together.

[0007] In some implementations... It also includes a connecting rod. The impeller has an impeller shaft hole that extends from one axial end face to the other axial end face. The connecting rod can be inserted into the impeller shaft hole from one axial end of the impeller and extend to the other axial end of the impeller. The connecting rod can assemble the impeller, the first dynamic balancing component, and the second dynamic balancing component into an integral impeller assembly. After the impeller assembly is assembled, the impeller is calibrated by the first dynamic balancing component and the second dynamic balancing component.

[0008] In some implementations... The first dynamic balancing component has a first shaft hole, and the second dynamic balancing component has a second shaft hole. The connecting rod passes through the first shaft hole, the impeller shaft hole, and the second shaft hole in sequence to connect the first dynamic balancing component, the second dynamic balancing component, and the impeller as a whole.

[0009] In some implementations... The impeller shaft hole includes a third shaft hole, a fourth shaft hole, and a fifth shaft hole. From one axial end face of the impeller to the other axial end face, the third shaft hole, the fourth shaft hole, and the fifth shaft hole are connected in sequence. The diameter of the third shaft hole is smaller than the diameter of the fourth shaft hole, and the diameter of the fourth shaft hole is smaller than the diameter of the fifth shaft hole, so as to form a stepped hole. The second dynamic balancing component is a columnar structure, comprising a first shaft segment, a second shaft segment, and a third shaft segment connected sequentially along its axial direction. The outer diameter of the first shaft segment is smaller than that of the second shaft segment, and the outer diameter of the second shaft segment is larger than that of the third shaft segment. The third shaft hole allows the connecting rod to pass through. The first shaft segment can be inserted into the fourth shaft hole, and the second shaft segment can be inserted into the fifth shaft hole and engaged on the end face where the fifth shaft hole and the fourth shaft hole meet.

[0010] In some implementations... The second shaft segment forms the first dynamic balancing machine transmission position of the impeller assembly. The connecting rod includes a main body and a protrusion. The protrusion protrudes radially outward from the main body to form a stepped structure. One axial end face of the protrusion is fitted with the end face of the third shaft segment of the dynamic balancing correction component. The protrusion forms a dynamic balancing support position at the other axial end of the impeller, and the third shaft segment forms a dynamic balancing correction position at the other axial end of the impeller.

[0011] In some implementations... One axial end of the dynamic balancing correction component is fitted onto one axial end face of the impeller, and the two are connected by a first positioning component; the end face of the fifth shaft hole is connected to the end face of the second shaft segment facing the impeller by a second positioning component.

[0012] In some implementations... The dynamic balancing correction component includes a fifth shaft segment and a sixth shaft segment connected in the axial direction. The outer diameter of the fifth shaft segment is larger than the outer diameter of the sixth shaft segment, and the fifth shaft segment is connected to the end face of one axial end of the impeller. It also includes fasteners, and the connecting rod further includes a first threaded section extending out of the first shaft hole of the dynamic balancing correction component. The outer peripheral wall of the first threaded section has external threads, and the fastener has internal threads. The fastener can be threadedly engaged with the first threaded section, and after the fastener is assembled onto the first threaded section, the axial end face of the fastener is connected to the axial end face of the sixth shaft section of the dynamic balancing correction component. This makes the fifth shaft section form a dynamic balancing correction position at one axial end of the impeller, and the sixth shaft section form a dynamic balancing support position at one axial end of the impeller.

[0013] In some implementations... One axial end of the rotating shaft is provided with a receiving hole. After the dynamic balancing correction and assembly of the impeller assembly are completed, one end of the dynamic balancing correction component can be inserted into the receiving hole, and one axial end of the connecting rod can also be inserted into the receiving hole to connect the impeller assembly and the rotating shaft as one unit.

[0014] In some implementations... The receiving hole includes a sixth shaft hole, a seventh shaft hole, and an eighth shaft hole that are connected sequentially in the axial direction. The diameter of the sixth shaft hole is larger than the outer diameter of the seventh shaft hole, the diameter of the seventh shaft hole is larger than the diameter of the eighth shaft hole, and the sixth shaft hole extends to the end face of one axial end of the rotating shaft. When the dynamic balancing correction component 2 includes a third shaft section, and the connecting rod includes a protrusion, the third shaft section can be engaged in the sixth shaft hole, and the protrusion is engaged in the seventh shaft hole. The third shaft section and the sixth shaft hole are in clearance fit, and the protrusion is also in clearance fit with the seventh shaft hole.

[0015] In some implementations... The connecting rod further includes a second threaded section that mates with the eighth shaft hole. The second threaded section is axially connected to the protrusion. The outer peripheral wall of the second threaded section has an external thread, and the hole wall of the eighth shaft hole has an internal thread. The second threaded section is threadedly engaged with the eighth shaft hole. A first radial clearance δ1 exists between the outer peripheral wall of the third shaft section and the inner peripheral wall of the sixth shaft hole, and a second radial clearance δ2 exists between the outer peripheral wall of the protrusion and the inner peripheral wall of the seventh shaft hole. When the dynamic balancing correction component two includes a second shaft segment, the axial end face of the second shaft segment facing the rotating shaft is connected to the axial end face of the rotating shaft through a third positioning component.

[0016] In some implementations... The rotating shaft includes a seventh shaft segment, an eighth shaft segment, a ninth shaft segment, a tenth shaft segment, and an eleventh shaft segment connected sequentially along its axial direction. The seventh shaft segment is a shaft segment that mates with both the dynamic balancing correction component two and the connecting rod. The seventh shaft segment is provided with the sixth shaft hole, the seventh shaft hole, and the eighth shaft hole. The outer diameter of the eighth shaft segment is larger than that of the seventh shaft segment, the free end of the eighth shaft hole extends into the interior of the eighth shaft segment, and the eighth shaft segment forms a dynamic balance correction position on one side of the shaft axis; The outer diameter of the ninth shaft segment is larger than that of the eighth shaft segment, the outer diameter of the tenth shaft segment is smaller than that of the ninth shaft segment, the outer diameter of the eleventh shaft segment is smaller than that of the tenth shaft segment, and the eleventh shaft segment forms a dynamic balance correction position on the other side of the shaft axis. The tenth shaft segment includes a second dynamic balancing machine transmission position, a second dynamic balancing support position one, and a second dynamic balancing support position two. The second dynamic balancing machine transmission position is located between the second dynamic balancing support position one and the second dynamic balancing support position two. The second dynamic balancing support position one is connected to the ninth shaft segment, and the second dynamic balancing support position two is connected to the eleventh shaft segment.

[0017] This utility model also provides an air compressor, which includes the aforementioned rotor assembly with dynamic balancing correction components.

[0018] The rotor assembly and air compressor with dynamic balancing correction components provided by this utility model have the following beneficial effects: 1. This utility model, by setting dynamic balancing correction components one and two, can act on both ends of the impeller's axial direction respectively, thereby enabling separate correction of the impeller and the rotor shaft. That is, after the impeller and rotor are separated, dynamic balancing correction can be performed on both separately, and the corrected state can be completely preserved on the assembled shaft. This achieves separate treatment of the source of imbalance, and when replacing components, there is no need to re-balance the other component. It effectively solves the problem in the prior art that the source of imbalance between the impeller and rotor of the air compressor is not completely eliminated and can still be triggered during the actual operation of the air compressor, resulting in poor rotor running accuracy.

[0019] 2. This utility model also effectively achieves the effect of assembling dynamic balancing components one and two into a single structure with the impeller through the connecting rod structure. Furthermore, the calibrated impeller assembly can be reassembled onto the rotating shaft. By using the connecting rod to assemble the impeller and rotating shaft in a mutually cooperating manner, the dynamic balancing surface on the rotating shaft is preserved. This allows the impeller to be assembled onto the tooling shaft along with newly added parts after separation from the rotor, forming a single unit capable of independent dynamic balancing, thus achieving separate dynamic balancing of the rotor and impeller. This utility model modifies the fitting structure between the impeller and rotor, ensuring that the impeller and the parts used for impeller dynamic balancing remain integrated after assembly and disassembly. When replacing the rotor or impeller, there is no need to recalibrate the other part. It enables the impeller and rotor to complete dynamic balancing separately, eliminating the source of imbalance to prevent coupling and avoiding the inconvenience of repeatedly calibrating intact parts after replacing damaged ones. Attached Figure Description

[0020] Figure 1 This is an exploded view of the rotor assembly with dynamic balancing correction components according to this utility model. Figure 2 This is an exploded longitudinal section view of the rotor assembly with dynamic balancing correction components of this utility model. Figure 3 This is a longitudinal sectional view of the assembled rotor assembly with dynamic balancing correction components of this utility model. Figure 4 yes Figure 3 A magnified view of part A; Figure 5 This is an exploded view of the assembly structure of the impeller assembly with dynamic balancing correction components according to this utility model; Figure 6 This is an exploded longitudinal section view of the impeller assembly with dynamic balancing correction components according to this utility model. Figure 7 This is a longitudinal sectional view of the assembled impeller assembly with dynamic balancing correction components according to this utility model.

[0021] The reference numerals in the attached figures are as follows: 1. Impeller; 2. Shaft; 3. Dynamic balancing component one; 4. Dynamic balancing component two; 5. Connecting rod; 6. Impeller shaft hole; 7. First shaft hole; 8. Second shaft hole; 9. Third shaft hole; 10. Fourth shaft hole; 11. Fifth shaft hole; 12. First shaft section; 13. Second shaft section; 14. Third shaft section; 15. First positioning component; 16. Second positioning component; 17. Main rod; 18. Protrusion; 19. Fifth shaft section; 20. ... 21. Sixth shaft segment; 22. Fastener; 23. First threaded segment; 24. Receiving hole; 25. Sixth shaft hole; 26. Seventh shaft hole; 27. Eighth shaft hole; 28. Second threaded segment; 29. ​​Third positioning component; 30. Seventh shaft segment; 31. Eighth shaft segment; 32. Ninth shaft segment; 33. Tenth shaft segment; 34. Eleventh shaft segment; 35. Second dynamic balancing machine transmission position; 36. Second dynamic balancing support position one; 37. Second dynamic balancing support position two. Detailed Implementation

[0022] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0025] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0026] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0028] like Figure 1-7 As shown, this utility model provides a rotor assembly with a dynamic balancing correction component, which includes: The impeller 1, shaft 2, dynamic balancing component 3, and dynamic balancing component 4 are provided. Dynamic balancing component 3 is connected to one axial end of the impeller 1 to calibrate that axial end, and dynamic balancing component 4 is connected to the other axial end of the impeller 1 to calibrate that other axial end. During the calibration process, the impeller 1 and the shaft 2 are calibrated separately. The impeller 1 is calibrated by the dynamic balancing component 3 and the dynamic balancing component 4, and the shaft 2 is calibrated separately. After the impeller 1 and the shaft 2 are calibrated separately, the impeller 1 and the shaft 2 are then assembled into one unit.

[0029] In the existing technology, the sources of imbalance between the impeller and the rotor may affect and couple with each other after assembly. Even if the overall dynamic balance correction is completed, the actual sources of imbalance are not completely eliminated and will still be triggered during the actual operation of the air compressor, resulting in poor rotor running accuracy.

[0030] This invention, through the aforementioned setting of dynamic balancing correction components one and two, can act on both ends of the impeller's axial direction, thereby enabling separate correction of the impeller and the rotor shaft. This means that after the impeller and rotor are separated, dynamic balancing correction can be performed on both, and the corrected state can be completely preserved on the assembled shaft. This achieves separate treatment of the sources of imbalance, and when replacing components, there is no need to re-balance the other component. It effectively solves the problem in existing technologies where the sources of imbalance between the impeller and rotor of air compressors are not completely eliminated and can still be triggered during actual operation, leading to poor rotor operating accuracy.

[0031] In some implementations... It also includes a connecting rod 5. The impeller 1 has an impeller shaft hole 6 that extends from one axial end face to the other axial end face. The connecting rod 5 can be inserted into the impeller shaft hole 6 from one axial end of the impeller 1 and extend to the other axial end of the impeller 1. The connecting rod 5 can assemble the impeller 1, the dynamic balancing correction component 1 3 and the dynamic balancing correction component 2 4 into an integral impeller assembly. After the impeller assembly is assembled, the impeller 1 is corrected by the dynamic balancing correction component 1 3 and the dynamic balancing correction component 2 4.

[0032] In the existing technology, if one of the impeller or rotor is damaged or even fails due to an accident during the transfer, assembly, and operation of the air compressor rotor and impeller, and needs to be replaced, then after replacing the damaged / failed part, the undamaged or failed parts still need to undergo a new dynamic balance correction. If the dynamic balance correction adopts the weight removal method, then the weight removal position of a single part may not have enough space to complete the second round of weight removal after one round of weight removal.

[0033] This invention, through the aforementioned connecting rod structure, effectively achieves the effect of simultaneously assembling dynamic balancing components one and two with the impeller into a single integrated structure. Furthermore, it allows the calibrated impeller assembly to be reassembled onto the rotating shaft. By using the connecting rod to mate the impeller and rotating shaft, the dynamic balancing surface on the rotating shaft is preserved. This allows the impeller to be assembled onto the tooling shaft along with newly added parts after separation from the rotor, forming a single unit capable of independent dynamic balancing. This achieves separate dynamic balancing for both the rotor and impeller. This invention modifies the impeller-rotor mating structure, ensuring that the impeller and the components used for impeller dynamic balancing remain integrated after assembly and disassembly. Replacing the rotor or impeller eliminates the need for rebalancing the other part. It enables separate dynamic balancing for the impeller and rotor, eliminating imbalance sources to prevent coupling and avoiding the inconvenience of repeatedly calibrating intact components after replacing damaged ones.

[0034] In some implementations... The first dynamic balancing component 3 has a first shaft hole 7, and the second dynamic balancing component 4 has a second shaft hole 8. The connecting rod 5 passes through the first shaft hole 7, the impeller shaft hole 6, and the second shaft hole 8 in sequence to connect the first dynamic balancing component 3, the second dynamic balancing component 4, and the impeller 1 into a whole.

[0035] This is a preferred structural form of the dynamic balancing correction components one and two of this utility model. The first shaft hole of the dynamic balancing correction component one can accommodate the connecting rod to pass through, and the dynamic balancing correction component two can also accommodate the connecting rod to pass through, so that the impeller and the dynamic balancing correction components at both ends of its axial direction are assembled into an integral structure through the connecting rod, thereby effectively performing the end-to-end correction function on the assembled impeller assembly and improving the coaxiality.

[0036] In some implementations... The impeller shaft hole 6 includes a third shaft hole 9, a fourth shaft hole 10, and a fifth shaft hole 11. From one axial end face of the impeller 1 to the other axial end face, the third shaft hole 9, the fourth shaft hole 10, and the fifth shaft hole 11 are connected in sequence. The diameter of the third shaft hole 9 is smaller than the diameter of the fourth shaft hole 10, and the diameter of the fourth shaft hole 10 is smaller than the diameter of the fifth shaft hole 11, so as to form a stepped hole. The dynamic balancing correction component 4 is a columnar structure, comprising a first shaft segment 12, a second shaft segment 13, and a third shaft segment 14 connected sequentially along its axial direction. The outer diameter of the first shaft segment 12 is smaller than the outer diameter of the second shaft segment 13, and the outer diameter of the second shaft segment 13 is larger than the outer diameter of the third shaft segment 14. The third shaft hole 9 allows the connecting rod 5 to pass through. The first shaft segment 12 can be inserted into the fourth shaft hole 10, and the second shaft segment 13 can be inserted into the fifth shaft hole 11 and engaged on the end face where the fifth shaft hole 11 and the fourth shaft hole 10 meet.

[0037] This is a preferred structural form and fit of the impeller shaft hole and the dynamic balancing correction component two that cooperate with it. It can form a stepped hole structure with two steps inside the impeller shaft hole, while the dynamic balancing correction component two forms a stepped surface structure with one step. This allows the connecting rod to cooperate with the third shaft hole, the first shaft segment to cooperate with the fourth shaft hole, and the second shaft segment to cooperate with the fifth shaft hole. This allows the first shaft segment to be tightly fitted to the impeller. The second shaft segment is used to form the transmission position of the dynamic balancing machine and is driven to rotate. The third shaft segment is used to form the structure of the dynamic balancing correction position on the other end of the impeller axis.

[0038] In some implementations... The second shaft segment 13 forms the first dynamic balancing machine transmission position of the impeller assembly. The connecting rod 5 includes a main rod 17 and a protrusion 18. The protrusion 18 protrudes radially outward from the main rod 17 to form a stepped structure. One axial end face of the protrusion 18 is fitted with the shaft end face of the third shaft segment 14 of the dynamic balancing correction component 2 4. The protrusion 18 forms a dynamic balancing support position at the other axial end of the impeller 1, and the third shaft segment 14 forms a dynamic balancing correction position at the other axial end of the impeller 1.

[0039] This is a further preferred structural form of the connecting rod of the present invention. Its main rod is used to pass through the impeller shaft hole and the second shaft hole of the dynamic balancing correction component two. The protrusion is used to abut against the third shaft section of the dynamic balancing correction component two, so that the protrusion of the connecting rod can effectively form a dynamic balancing support position at the other end of the impeller shaft, thereby improving the support effect.

[0040] In some implementations... One axial end of the dynamic balancing correction component 3 is fitted onto one axial end face of the impeller 1, and the two are connected by the first positioning component 15; the end face of the fifth shaft hole 11 and the end face of the second shaft segment 13 facing the impeller 1 are connected by the second positioning component 16.

[0041] The present invention further preferably adopts the structure of the first positioning member to position the dynamic balancing correction member one and the axial end face of the impeller, so that the dynamic balancing correction member one and the impeller form circumferential and radial positioning. The second positioning member is used to position the dynamic balancing correction member two and the other axial end of the impeller, so that the dynamic balancing correction member two and the impeller form circumferential and radial positioning, thereby further improving the dynamic balancing correction effect at both ends of the impeller.

[0042] In some implementations... The dynamic balancing correction component 3 includes a fifth shaft section 19 and a sixth shaft section 20 connected in the axial direction. The outer diameter of the fifth shaft section 19 is larger than the outer diameter of the sixth shaft section 20, and the fifth shaft section 19 is connected to the end face of one axial end of the impeller 1. It also includes a fastener 21 (preferably a lock nut), and the connecting rod 5 also includes a first threaded section 22 extending out of the first shaft hole 7 of the dynamic balancing correction component 3. The outer peripheral wall of the first threaded section 22 has an external thread, and the fastener 21 has an internal thread. The fastener 21 can be threadedly engaged with the first threaded section 22, and after the fastener 21 is assembled onto the first threaded section 22, the axial end face of the fastener 21 is connected to the axial end face of the sixth shaft section 20 of the dynamic balancing correction component 3; so that the fifth shaft section 19 forms a dynamic balancing correction position at one axial end of the impeller 1, and the sixth shaft section 20 forms a dynamic balancing support position at one axial end of the impeller 1.

[0043] This utility model, through the preferred structural form of the above-mentioned dynamic balancing correction component, forms a fifth and a sixth shaft segment with unequal outer diameters. The sixth shaft segment is fitted and connected to the impeller. Combined with the structure of the fastener, the fastener is fixedly connected to the first threaded section on the connecting rod, and the end face of the fastener moves to abut against the sixth shaft segment. Thus, the sixth shaft segment forms a dynamic balancing support position at one end of the impeller's axial direction, while the fifth shaft segment effectively forms a dynamic balancing correction position at one end of the impeller's axial direction, effectively improving the dynamic balancing correction effect and support effect at one end of the impeller's axial direction.

[0044] Compared with the existing technology, the new impeller of this utility model is no longer axially fixed to the rotor by a single locking screw. Instead, it is assembled with two other newly added dynamic balancing components onto the integrated core rod of the new impeller and then axially fixed to the rotor by a locking nut. At the same time, after being separated from the rotor, this part can also be assembled to form a new impeller assembly for separate dynamic balancing.

[0045] The novel impeller design of this invention allows for dynamic balancing by assembling it with other components into an impeller assembly, even without being mounted onto the rotor. Figure 5 As shown. The pins (locating parts) correspond one-to-one with the pin holes (e.g., ...). Figure 6After assembly, the corresponding parts of the impeller assembly that play a role in dynamic balancing are marked as follows. Figure 7 .

[0046] To minimize disruption to the pneumatic flow path during actual operation of the air compressor, the outer diameter of the dynamic balancing correction component 3 of this invention needs to be minimized. To ensure sufficient space for dynamic balancing correction, its axial length is designed to be relatively long, and a step is provided between the correction position and the support position to clearly define the corresponding boundaries and prevent confusion. The dynamic balancing correction component 4 needs to fulfill a greater role—to maintain the original sealing structure with the impeller, its left step and the largest outer diameter of the impeller shaft hole (the fifth shaft hole) need to be consistent with the mating structure between the rotor and the impeller. Since sealing is involved, the largest outer diameter obviously cannot be used as a correction or support position, so it can only be used as a transmission position. For ease of assembly, the outer diameter of the right step (third shaft section 14) of the correction component 4 should generally be larger than the outer diameter of the core rod shoulder (protrusion 18), allowing for a larger amount of imbalance to be corrected. Therefore, the right step (third shaft section 14) of the correction component is selected as the correction position, and the core rod shoulder (protrusion 18) as the support position.

[0047] In some implementations... The shaft 2 has a receiving hole 23 at one axial end. After the dynamic balancing correction and assembly of the impeller assembly are completed, one end of the dynamic balancing correction component 4 can be inserted into the receiving hole 23, and one axial end of the connecting rod 5 can also be inserted into the receiving hole 23 to connect the impeller assembly and the shaft 2 into one unit.

[0048] This is a preferred structural form of the rotating shaft of this utility model, which cooperates with the dynamic balancing correction component and the connecting rod. Through the structure of the receiving hole, the dynamic balancing correction component and the connecting rod are simultaneously inserted into it, realizing the assembly structure of connecting the impeller assembly and the rotating shaft as one unit. Thus, after the dynamic balancing correction of the impeller and the rotating shaft is completed separately, the two are effectively assembled into one unit. After the impeller and the rotor are separated, dynamic balancing correction can be completed independently, while retaining the original dynamic balancing correction position on the rotor. Furthermore, when the rotor or impeller is replaced, there is no need to recalibrate the other part. This not only eliminates the source of imbalance to prevent coupling, but also avoids the inconvenience of repeatedly calibrating intact parts after replacing damaged parts.

[0049] In some implementations... The receiving hole 23 includes a sixth shaft hole 24, a seventh shaft hole 25 and an eighth shaft hole 26 that are connected sequentially in the axial direction. The diameter of the sixth shaft hole 24 is larger than the outer diameter of the seventh shaft hole 25, the diameter of the seventh shaft hole 25 is larger than the diameter of the eighth shaft hole 26, and the sixth shaft hole 24 extends to the end face of one axial end of the rotating shaft 2. When the dynamic balancing correction component 2 4 includes a third shaft section 14 and the connecting rod 5 includes a protrusion 18, the third shaft section 14 can be engaged in the sixth shaft hole 24, and the protrusion 18 is engaged in the seventh shaft hole 25. The third shaft section 14 and the sixth shaft hole 24 are in clearance fit, and the protrusion 18 is also in clearance fit with the seventh shaft hole 25.

[0050] This is a further preferred structural form of the receiving hole of the present invention, namely, forming a stepped hole structure with at least three segments, such that the third shaft segment is engaged in the sixth shaft hole located at the end face of the rotating shaft, the protrusion is engaged in the seventh shaft hole, and the third shaft segment is clearance-fitted with the sixth shaft hole, and the protrusion is clearance-fitted with the seventh shaft hole, which allows for appropriate adjustment space according to the actual installation situation.

[0051] The novel design of this utility model adds one different dynamic balancing component at both the front and rear of the impeller, which is assembled together with the impeller on the integrated core rod (connecting rod 5) (e.g., Figure 1-2 Transition fits or small interference fits can be used to ensure the coaxiality of each assembled part with the core rod. Before assembling with components such as the impeller, the rotor can be dynamically balanced independently; the positions where it plays a role in the dynamic balancing are marked. Figure 2 In the process of assembling the impeller onto the rotor, first, install the pins (locating parts) used for circumferential positioning on one side of the rotor into the pin holes. Then, assemble the integrated core rod into the center hole of the rotor with the corresponding threaded fit. Finally, assemble the impeller and the dynamic balancing component onto the integrated core rod, ensuring that the pins and pin holes of each part correspond one-to-one, and secure them with lock nuts (e.g., ...). Figure 2 After assembly, a gap is left between the third shaft section extending into the rotor and the sixth shaft hole, and a gap is left between the protrusion and the seventh shaft hole (e.g., Figure 3-4 ).

[0052] In some implementations... The connecting rod 5 further includes a second threaded section 27 that mates with the eighth shaft hole 26. The second threaded section 27 is axially connected to the protrusion 18. The outer peripheral wall of the second threaded section 27 has an external thread, and the hole wall of the eighth shaft hole 26 has an internal thread. The second threaded section 27 is threadedly engaged with the eighth shaft hole 26. A first radial clearance δ1 is formed between the outer peripheral wall of the third shaft section 14 and the inner peripheral wall of the sixth shaft hole 24. A second radial clearance δ2 is formed between the outer peripheral wall of the protrusion 18 and the inner peripheral wall of the seventh shaft hole 25. When the dynamic balancing correction component 24 includes the second shaft segment 13, the axial end face of the second shaft segment 13 facing the rotating shaft 2 is connected to the axial end face of the rotating shaft 2 by a third positioning component 28.

[0053] This is a further preferred structural form of the connecting rod of this utility model. Through the structure of the second threaded section, it can be threadedly connected to the innermost eighth shaft hole of the receiving hole, so that the connecting rod and the rotating shaft form a relatively fixed positional relationship, thereby assembling the impeller assembly and the rotating shaft into one piece without easily falling off. Through the structure of the third positioning member between the shaft end face and the second shaft section, the positioning assembly between the dynamic balance correction member two and the rotating shaft can be realized, and the positioning assembly between the impeller assembly and the rotating shaft can be realized, ensuring relative limitation in the radial and circumferential directions. The aforementioned first radial clearance and second radial clearance can allow the connecting rod and the dynamic balance correction member two to have radial adjustment space between themselves and the rotating shaft.

[0054] Because the calibration position of the dynamic balancing calibration component 2 of this utility model needs to extend into the rotor when the impeller is assembled onto the rotor, and the calibration position should avoid hard contact after calibration to prevent changes in the calibrated state, the rotor should also not contact the calibration position after it extends into the rotor, and a gap should be left to ensure that the calibration position of the impeller assembly does not change. The core rod (connecting rod 5) has a support position for the dynamic balancing calibration of the impeller assembly. Therefore, there will be slight wear with the support bearing / roller of the dynamic balancing machine during dynamic balancing calibration. If there is contact with the rotor, the wear during dynamic balancing calibration may still make the assembly stiff or difficult. Therefore, it is recommended to leave the inner circle of the rotor at the corresponding position empty to reduce wear.

[0055] In some implementations... The rotating shaft 2 includes a seventh shaft segment 29, an eighth shaft segment 30, a ninth shaft segment 31, a tenth shaft segment 32, and an eleventh shaft segment 33 connected sequentially along its axial direction. The seventh shaft segment 29 is a shaft segment that mates with both the dynamic balancing correction component 4 and the connecting rod 5. The seventh shaft segment 29 is provided with the sixth shaft hole 24, the seventh shaft hole 25, and the eighth shaft hole 26. The outer diameter of the eighth shaft segment 30 is larger than that of the seventh shaft segment 29, and the free end of the eighth shaft hole 26 extends into the interior of the eighth shaft segment 30. The eighth shaft segment 30 is formed as a dynamic balance correction position on one side of the axial direction of the rotating shaft 2. The outer diameter of the ninth shaft segment 31 is larger than that of the eighth shaft segment 30, the outer diameter of the tenth shaft segment 32 is smaller than that of the ninth shaft segment 31, the outer diameter of the eleventh shaft segment 33 is smaller than that of the tenth shaft segment 32, and the eleventh shaft segment 33 forms a dynamic balance correction position on the other side of the axis of the rotating shaft 2. The tenth shaft segment 32 includes a second dynamic balancing machine transmission position 34, a first second dynamic balancing support position 35, and a second second dynamic balancing support position 36. The second dynamic balancing machine transmission position 34 is located between the first second dynamic balancing support position 35 and the second second dynamic balancing support position 36. The first second dynamic balancing support position 35 is connected to the ninth shaft segment 31, and the second second dynamic balancing support position 36 is connected to the eleventh shaft segment 33.

[0056] This is the preferred structural form of the rotating shaft of this utility model. By setting it into a multi-segment stepped shaft with the seventh to eleventh shaft segments as described above, the seventh shaft segment can be used to connect with the connecting rod of the impeller assembly and the second dynamic balancing correction component. The eighth shaft segment forms a dynamic balancing correction position on one side for dynamic balancing correction of the rotating shaft, the eleventh shaft segment forms a dynamic balancing correction position on the other side for dynamic balancing correction of the rotating shaft, and the tenth shaft segment forms the dynamic balancing machine transmission position of the rotating shaft, which can be driven to rotate. The two ends of the transmission position are dynamic balancing support positions that support it, thereby effectively performing individual dynamic balancing correction of the rotating shaft.

[0057] This utility model also provides an air compressor, which includes the aforementioned rotor assembly with dynamic balancing correction components.

[0058] This utility model provides an air compressor rotor structure that can set dynamic balancing correction surfaces for the impeller and rotor respectively. After the impeller and rotor are separated, dynamic balancing correction can be performed separately, and the corrected state can be completely retained on the assembled shaft. This enables separate treatment of the source of imbalance, and when replacing a component, there is no need to re-perform dynamic balancing correction on the other component.

[0059] This invention adds a component for dynamic balancing at the impeller, allowing for independent dynamic balancing after the impeller is separated from the rotor, while retaining the original dynamic balancing position on the rotor. The invention also modifies the fitting structure between the impeller and rotor, ensuring that the impeller and the component for impeller dynamic balancing remain integrated after assembly and disassembly, eliminating the need to rebalance the other part when replacing the rotor or impeller. Therefore, this invention eliminates the sources of imbalance to prevent coupling and avoids the inconvenience of repeatedly balancing intact parts after replacing damaged ones.

[0060] The dynamic balance correction position of this invention can be set as either a weight reduction position or a weight increase position, depending on the actual needs of the rotor.

[0061] The preferred embodiment of this utility model only shows an example of a rotor with single-arm suspension and single-stage compression. If it is a single-arm suspension and two-stage compression, the number of correction components remains unchanged and both impellers are located in the middle of the correction components. If it is a double-arm suspension, the impeller on the other side of the rotor can also adopt the same structure.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A rotor assembly with a dynamic balancing correction component, characterized in that: include: The impeller (1), shaft (2), dynamic balancing component one (3), and dynamic balancing component two (4) are provided. The dynamic balancing component one (3) is connected to one axial end of the impeller (1) to calibrate one axial end of the impeller (1), and the dynamic balancing component two (4) is connected to the other axial end of the impeller (1) to calibrate the other axial end of the impeller (1). During the calibration process, the impeller (1) and the shaft (2) are calibrated separately. The impeller (1) is calibrated by the first dynamic balancing component (3) and the second dynamic balancing component (4). The shaft (2) is calibrated separately. After the impeller (1) and the shaft (2) are calibrated separately, the impeller (1) and the shaft (2) are assembled into one unit.

2. The rotor assembly with dynamic balancing correction components according to claim 1, characterized in that: include: It also includes a connecting rod (5). The impeller (1) has an impeller shaft hole (6) that extends from one axial end face to the other axial end face. The connecting rod (5) can be inserted into the impeller shaft hole (6) from one axial end of the impeller (1) and extend to the other axial end of the impeller (1). The connecting rod (5) can assemble the impeller (1), the first dynamic balance correction component (3), and the second dynamic balance correction component (4) into an integral impeller assembly. After the impeller assembly is assembled, the impeller (1) is corrected by the first dynamic balance correction component (3) and the second dynamic balance correction component (4).

3. The rotor assembly with dynamic balancing correction components according to claim 2, characterized in that: include: The first dynamic balancing component (3) has a first shaft hole (7), the second dynamic balancing component (4) has a second shaft hole (8), and the connecting rod (5) passes through the first shaft hole (7), the impeller shaft hole (6) and the second shaft hole (8) in sequence to connect the first dynamic balancing component (3), the second dynamic balancing component (4) and the impeller (1) into one unit.

4. The rotor assembly with dynamic balancing correction components according to claim 3, characterized in that: include: The impeller shaft hole (6) includes a third shaft hole (9), a fourth shaft hole (10) and a fifth shaft hole (11). From one axial end face of the impeller (1) to the other axial end face, the third shaft hole (9), the fourth shaft hole (10) and the fifth shaft hole (11) are connected in sequence. The diameter of the third shaft hole (9) is smaller than the diameter of the fourth shaft hole (10), and the diameter of the fourth shaft hole (10) is smaller than the diameter of the fifth shaft hole (11) to form a stepped hole. The dynamic balancing correction component 2 (4) is a columnar structure, including a first shaft segment (12), a second shaft segment (13) and a third shaft segment (14) connected sequentially along its axial direction. The outer diameter of the first shaft segment (12) is smaller than the outer diameter of the second shaft segment (13), and the outer diameter of the second shaft segment (13) is larger than the outer diameter of the third shaft segment (14). The third shaft hole (9) allows the connecting rod (5) to pass through. The first shaft segment (12) can be inserted into the fourth shaft hole (10), and the second shaft segment (13) can be inserted into the fifth shaft hole (11) and locked on the end face where the fifth shaft hole (11) and the fourth shaft hole (10) meet.

5. The rotor assembly with dynamic balancing correction components according to claim 4, characterized in that: include: The second shaft segment (13) forms the first dynamic balancing machine transmission position of the impeller assembly. The connecting rod (5) includes a main rod (17) and a protrusion (18). The protrusion (18) protrudes radially outward from the main rod (17) to form a stepped structure. One axial end face of the protrusion (18) is fitted with the shaft end face of the third shaft section (14) of the dynamic balance correction component (4). The protrusion (18) forms a dynamic balance support position at the other axial end of the impeller (1), and the third shaft section (14) forms a dynamic balance correction position at the other axial end of the impeller (1).

6. The rotor assembly with dynamic balancing correction components according to claim 4, characterized in that: include: One axial end of the dynamic balancing correction component (3) is fitted onto one axial end face of the impeller (1), and the two are connected by the first positioning component (15); the end face of the fifth shaft hole (11) and the end face of the second shaft segment (13) facing the impeller (1) are connected by the second positioning component (16).

7. The rotor assembly with a dynamic balancing correction component according to claim 6, characterized in that: include: The dynamic balancing correction component (3) includes a fifth shaft segment (19) and a sixth shaft segment (20) connected in the axial direction. The outer diameter of the fifth shaft segment (19) is larger than the outer diameter of the sixth shaft segment (20), and the fifth shaft segment (19) is connected to the end face of one axial end of the impeller (1). It also includes a fastener (21), and the connecting rod (5) also includes a first threaded section (22) extending out of the first shaft hole (7) of the dynamic balancing correction component (3). The outer peripheral wall of the first threaded section (22) has an external thread, and the fastener (21) has an internal thread. The fastener (21) can be threadedly engaged with the first threaded section (22), and after the fastener (21) is assembled onto the first threaded section (22), the axial end face of the fastener (21) is connected to the axial end face of the sixth shaft section (20) of the dynamic balancing correction component (3); so that the fifth shaft section (19) is formed as the dynamic balancing correction position of one axial end of the impeller (1), and the sixth shaft section (20) is formed as the dynamic balancing support position of one axial end of the impeller (1).

8. The rotor assembly with a dynamic balancing correction component according to any one of claims 2-7, characterized in that: include: The shaft (2) has a receiving hole (23) at one axial end. After the dynamic balance correction and assembly of the impeller assembly are completed, one end of the dynamic balance correction component (4) can be inserted into the receiving hole (23), and one axial end of the connecting rod (5) can also be inserted into the receiving hole (23) to connect the impeller assembly and the shaft (2) into one unit.

9. The rotor assembly with a dynamic balancing correction component according to claim 8, characterized in that: include: The receiving hole (23) includes a sixth shaft hole (24), a seventh shaft hole (25) and an eighth shaft hole (26) that are connected in sequence in the axial direction. The diameter of the sixth shaft hole (24) is larger than the outer diameter of the seventh shaft hole (25), the diameter of the seventh shaft hole (25) is larger than the diameter of the eighth shaft hole (26), and the sixth shaft hole (24) extends to the end face of one axial end of the rotating shaft (2). When the dynamic balancing correction component 2 (4) includes a third shaft segment (14) and the connecting rod (5) includes a protrusion (18), the third shaft segment (14) can be engaged in the sixth shaft hole (24), the protrusion (18) is engaged in the seventh shaft hole (25), the third shaft segment (14) is clearance-fitted with the sixth shaft hole (24), and the protrusion (18) is also clearance-fitted with the seventh shaft hole (25).

10. The rotor assembly with a dynamic balancing correction component according to claim 9, characterized in that: include: The connecting rod (5) further includes a second threaded section (27) that mates with the eighth shaft hole (26). The second threaded section (27) is axially connected to the protrusion (18). The outer peripheral wall of the second threaded section (27) has an external thread, and the hole wall of the eighth shaft hole (26) has an internal thread. The second threaded section (27) is threadedly engaged with the eighth shaft hole (26). There is a first radial clearance δ1 between the outer peripheral wall of the third shaft section (14) and the inner peripheral wall of the sixth shaft hole (24), and a second radial clearance δ2 between the outer peripheral wall of the protrusion (18) and the inner peripheral wall of the seventh shaft hole (25). When the dynamic balancing correction component 2 (4) includes the second shaft segment (13), the axial end face of the second shaft segment (13) facing the rotating shaft (2) is connected to the end face of the rotating shaft (2) by a third positioning component (28).

11. The rotor assembly with a dynamic balancing correction component according to claim 9, characterized in that: include: The rotating shaft (2) includes a seventh shaft segment (29), an eighth shaft segment (30), a ninth shaft segment (31), a tenth shaft segment (32), and an eleventh shaft segment (33) connected sequentially along its axial direction. The seventh shaft segment (29) is a shaft segment that mates with both the dynamic balancing correction component (4) and the connecting rod (5). The interior of the seventh shaft segment (29) is provided with the sixth shaft hole (24), the seventh shaft hole (25), and the eighth shaft hole (26). The outer diameter of the eighth shaft segment (30) is larger than that of the seventh shaft segment (29), and the free end of the eighth shaft hole (26) extends into the interior of the eighth shaft segment (30). The eighth shaft segment (30) forms a dynamic balance correction position on one side of the axial direction of the rotating shaft (2). The outer diameter of the ninth shaft segment (31) is larger than that of the eighth shaft segment (30), the outer diameter of the tenth shaft segment (32) is smaller than that of the ninth shaft segment (31), the outer diameter of the eleventh shaft segment (33) is smaller than that of the tenth shaft segment (32), and the eleventh shaft segment (33) is formed as the dynamic balance correction position on the other side of the axis of the rotating shaft (2). The tenth shaft segment (32) includes a second dynamic balancing machine transmission position (34), a first second dynamic balancing support position (35), and a second second dynamic balancing support position (36). The second dynamic balancing machine transmission position (34) is located between the first second dynamic balancing support position (35) and the second second dynamic balancing support position (36). The first second dynamic balancing support position (35) is connected to the ninth shaft segment (31), and the second second dynamic balancing support position (36) is connected to the eleventh shaft segment (33).

12. An air compressor, characterized in that: The rotor assembly including the dynamic balancing correction component as described in any one of claims 1-11.

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