Auxiliary structure and method for measuring outer diameter of fan rotor

Abstract

The invention discloses a fan rotor outer diameter measurement auxiliary structure and a measurement method, and relates to the technical field of rotor outer diameter measurement, the fan rotor outer diameter measurement auxiliary structure comprises an auxiliary unit, the auxiliary unit comprises limiting plates, and the limiting plates are attached to the two end faces of an impeller on a rotor; the first limiting blocks are arranged at the two opposite ends of the two inner holes in the rotor respectively, and the outer circumferential surfaces of the first limiting blocks are attached to the circumferential surfaces of the inner holes; the connecting rods are arranged in the two limiting inner holes in a penetrating mode respectively, the two ends of each connecting rod sequentially penetrate through the first limiting blocks and the limiting plates on the two sides respectively, locking nuts are connected to the two ends of each connecting rod in a screwed mode respectively, and the two locking nuts are matched with the side faces, deviating from each other, of the two limiting plates respectively; and one end of the measuring auxiliary block is connected with the limiting plate, and the other end of the measuring auxiliary block extends out of the coverage range of the outer diameter of the impeller. According to the invention, the technical problem of high measurement cost in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of rotor outer diameter measurement, and in particular to a fan rotor outer diameter measurement auxiliary structure and a measurement method. Background Art

[0002] like Figure 2 As shown in the figure, the outer diameter D dimension processing of the impeller in the three-blade Roots blower rotor is the last step of the rotor processing. After the processing is completed, the circular runout of the outer circle of the impeller 2 must be within the tolerance range to ensure the processing accuracy of the impeller 2. In order to ensure the processing accuracy of the outer diameter D of the impeller 2, the outer diameter D dimension of the impeller 2 must be measured while processing, and the workpiece can only be removed from the processing device until the measured dimension reaches the drawing dimension.

[0003] like Figure 1 and Figure 2 As shown, the rotor of the three-blade Roots blower includes a rotating shaft 1, an impeller 2 is disposed outside the rotating shaft, the end face of the impeller 2 is perpendicular to the central axis of the impeller 2, the impeller 2 includes three cylinders arranged at intervals along its circumference, the cylinder is provided with an inner hole 21, the central axis of the inner hole 21 coincides with the central axis of the corresponding cylinder, the central axis of the inner hole 21 is parallel to the central axis of the rotating shaft 1, the inner hole 21 passes through the opposite two end faces of the impeller 2, the impeller 2 is not a full circle, and needs to be used Figure 2 It is measured by a special three-point micrometer 3 with higher measurement accuracy. This kind of three-point micrometer 3 has high requirements for measurement accuracy, so its own processing accuracy requirements are also high. At present, it mainly relies on special customization from abroad, which is expensive, resulting in high measurement costs. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a fan rotor outer diameter measurement auxiliary structure and measurement method to solve the technical problem of high measurement cost in the prior art.

[0005] To achieve the above object, the present invention provides a fan rotor outer diameter measurement auxiliary structure, comprising a rotor and an auxiliary unit, wherein the auxiliary unit comprises:

[0006] A limiting plate, both end surfaces of the impeller on the rotor are attached with the limiting plate;

[0007] A first limit block, wherein the first limit blocks are respectively disposed at opposite ends of the two inner holes on the rotor, and the outer circumference of the first limit block is in contact with the circumference of the inner hole, the inner hole with the first limit block is an inner hole for limiting, and the other inner hole is an inner hole for measuring;

[0008] A connecting rod, wherein the two inner holes for limiting are respectively provided with the connecting rod, and the two ends of the connecting rod respectively pass through the first limiting blocks and the limiting plates on both sides in sequence, and the two ends of the connecting rod are respectively screwed with locking nuts, and the two locking nuts are respectively matched with the side surfaces of the two limiting plates that are away from each other;

[0009] A measuring auxiliary block, one end of which is connected to the limit plate, and the other end of which extends out of the coverage range of the impeller outer diameter. When processing the impeller outer diameter, one end of the measuring auxiliary block away from the measuring inner hole can be processed into an arc-shaped structure, and the central axis of the arc-shaped structure, the central axis of the measuring inner hole, and the central axis of the rotating shaft on the rotor are parallel and in the same plane, and the arc-shaped structure is symmetrical about the plane.

[0010] Furthermore, the auxiliary unit also includes a second limit block, and the opposite ends of the connecting rod are respectively fixed with the second limit blocks, and the two second limit blocks are respectively located between the two first limit blocks, and the second limit block and the inner hole have a clearance fit, and the first limit block and the inner hole have a transition fit.

[0011] Furthermore, the two first limiting blocks are respectively welded and fixed to the limiting plates.

[0012] Furthermore, the limiting plate and the first limiting block are respectively provided with a first limiting through hole allowing the connecting rod to pass through, and the outer diameter of the connecting rod is smaller than the outer diameter of the first limiting through hole.

[0013] Furthermore, the measurement auxiliary block is located between the two limiting inner holes, the measurement auxiliary block and the measuring inner hole are located on opposite sides of the rotating shaft, a strip-shaped notch is provided on the end face of the measurement auxiliary block close to the measuring inner hole, and at least two second limiting through holes are provided at intervals on the upper side of the limiting plate in a direction away from the measuring inner hole, and at least two of the second limiting through holes are respectively connected to the notches by bolts.

[0014] Furthermore, the two opposite ends of the limit plate are respectively provided with extension parts, and the two first limit blocks and the two extension parts correspond one to one, and the first limit blocks and the extension parts slide and limit along the direction of the vertical connection line of the two center axes of the inner holes for limiting, and the two connecting rods and the two extension parts correspond one to one, and the connecting rods and the extension parts slide and fit along the direction of the vertical connection line of the two center axes of the inner holes for limiting and can be locked by the locking nut.

[0015] Furthermore, the extension portion is provided with two first strip-shaped through grooves, which extend along the direction of the vertical connection line of the center axes of the two inner holes for limiting, and the end face of the first limiting block is provided with two square limiting protrusions, and the upper and lower end faces of the limiting protrusions are respectively fitted with the first strip-shaped through grooves, and the limiting protrusions are slidably matched with the first strip-shaped through grooves.

[0016] Furthermore, the extension portion is also provided with a second strip-shaped through groove, which extends along the direction of the vertical connection line of the central axes of the two inner holes for limiting, and the second strip-shaped through groove is arranged between the two first strip-shaped through grooves, and the opposite side surfaces of the second strip-shaped through groove are respectively fitted with the connecting rod, and the connecting rod is slidingly matched with the second strip-shaped through groove.

[0017] The present invention also provides a method for measuring the outer diameter of a fan rotor. Using the above-mentioned auxiliary structure for measuring the outer diameter of a fan rotor, the method for measuring the outer diameter of a fan rotor comprises the following steps:

[0018] The connecting rod and the two second limiting blocks are inserted into the limiting inner hole as a first integral body, and the two first integral bodies are respectively inserted into the two limiting inner holes;

[0019] The limiting plate and the two first limiting blocks are plugged and matched with the connecting rod as a second whole;

[0020] At the same time, the locking nuts on opposite sides of the impeller are rotated, and under the action of the locking nuts, the first limit block and the limit inner hole form a transition fit until the two limit plates are respectively fitted with the two end faces of the impeller;

[0021] The first integral body, the second integral body, the impeller and the auxiliary measuring block are used as a whole to process the outer diameter of the rotor, and the auxiliary measuring block is processed into the arc-shaped structure;

[0022] The longest radial distance between the cylinder corresponding to the measuring inner hole and the arc-shaped structure is measured using a length micrometer to measure the outer diameter D of the impeller.

[0023] The present invention also provides a method for measuring the outer diameter of a fan rotor. Using the above-mentioned auxiliary structure for measuring the outer diameter of a fan rotor, the method for measuring the outer diameter of a fan rotor comprises the following steps:

[0024] The connecting rod and the two second limiting blocks are inserted into the limiting inner hole as a first integral body, and the two first integral bodies are respectively inserted into the two limiting inner holes;

[0025] The first limiting blocks are respectively preliminarily inserted into the corresponding limiting inner holes;

[0026] The extension part is plug-fitted with the corresponding limiting protrusion and the connecting rod respectively;

[0027] The locking nuts on opposite sides of the impeller are rotated at the same time. Under the action of the locking nuts, the first limit block and the limit inner hole form a transition fit. While rotating the locking nuts, the positions of the limit plates are adjusted until the two limit plates are respectively fitted with the two end faces of the impeller and the limit plates are in a suitable position.

[0028] Along the radial direction of the impeller, adjusting the measurement auxiliary block to a position where it can be processed into the arc-shaped structure;

[0029] The first integral body, the first limiting block, the limiting plate, the impeller and the auxiliary measuring block are used as a whole to process the outer diameter of the rotor, and the auxiliary measuring block is processed into the arc-shaped structure;

[0030] The longest radial distance between the cylinder corresponding to the measuring inner hole and the arc-shaped structure is measured using a length micrometer to measure the outer diameter D of the impeller.

[0031] The beneficial effects of the present invention are:

[0032] During the processing of the impeller outer diameter, the end of the measuring auxiliary block away from the measuring inner hole can be processed into an arc-shaped structure. Since the central axis of the arc-shaped structure, the central axis of the measuring inner hole and the central axis of the rotating shaft are parallel and in the same plane, and the arc-shaped structure is symmetrical about the plane, when measuring the outer diameter of the impeller during the processing, the farthest radial distance between the cylinder corresponding to the measuring inner hole and the arc-shaped structure is measured with a length micrometer, and the outer diameter D of the impeller can be measured without the need for a dedicated three-point micrometer, which greatly reduces the measurement cost;

[0033] The setting of two measurement auxiliary blocks provides two measurement opportunities, ensuring the measurement accuracy;

[0034] The two limit plates are connected by a connecting rod, so that the two limit plates can be firmly connected to the impeller, preventing the measurement auxiliary block from moving during the cutting process of the measurement auxiliary block, thereby ensuring the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] Figure 1 It is a structural diagram of a three-leaf Roots blower rotor in the prior art;

[0037] Figure 2 It is a matching diagram of a three-leaf Roots blower rotor and a three-point micrometer in the prior art;

[0038] Figure 3 This is an overall structural diagram of Embodiment 1 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0039] Figure 4 This is a structural diagram of an auxiliary unit in Embodiment 1 of an auxiliary structure for measuring the outer diameter of a fan rotor according to the present invention;

[0040] Figure 5 It is an assembly diagram of a limit plate, a measurement auxiliary block, a bolt and a first limit block in Embodiment 1 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0041] Figure 6 It is an assembly diagram of a locking nut, a connecting rod and a second limit block in Embodiment 1 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0042] Figure 7 This is a structural diagram of a limit plate in Embodiment 1 of an auxiliary structure for measuring the outer diameter of a fan rotor according to the present invention;

[0043] Figure 8 It is a structural diagram of a measurement auxiliary block in Embodiment 1 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0044] Fig. 9 It is a structural diagram of the impeller in Embodiment 1 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0045] Fig.10 This is an overall structural diagram of Embodiment 2 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0046] Fig.11 This is a structural diagram of an auxiliary unit in Embodiment 2 of an auxiliary structure for measuring the outer diameter of a fan rotor according to the present invention;

[0047] Fig.12 for Fig.11 A partial enlarged view of the middle A;

[0048] Fig.13 This is a structural diagram of a limit plate in Embodiment 2 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0049] Fig.14 It is an assembly diagram of a locking nut, a connecting rod and a second limit block in Embodiment 2 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0050] Fig.15 This is a structural diagram of the first limit block in Embodiment 2 of a fan rotor outer diameter measurement auxiliary structure of the present invention;

[0051] Fig.16 This is a structural diagram of a measurement auxiliary block in Example 2 of an auxiliary structure for measuring the outer diameter of a fan rotor according to the present invention.

[0052] In the figure, 1, rotating shaft; 2, impeller; 21, inner hole; 211, inner hole for limiting; 212, inner hole for measuring; 3, three-point micrometer; 4, auxiliary unit; 41, limiting plate; 411, first limiting through hole; 412, second limiting through hole; 413, first strip-shaped through groove; 414, second strip-shaped through groove; 415, ridge; 42, auxiliary block for measuring; 421, notch; 43, bolt; 44, locking nut; 45, connecting rod; 46, first limiting block; 461, limiting protrusion; 462, large diameter part; 463, small diameter part; 47, second limiting block. DETAILED DESCRIPTION

[0053] The following is combined with Figure 1 -Attached Fig.16 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0054] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0058] The invention provides an auxiliary structure for measuring the outer diameter of a fan rotor.

[0059] Example 1

[0060] like Figure 1-Figure 9 As shown, an auxiliary structure for measuring the outer diameter of a fan rotor includes a rotor and an auxiliary unit 4, wherein the auxiliary unit 4 includes: a limit plate 41, wherein both end surfaces of the impeller 2 on the rotor are fitted with the limit plate 41; a first limit block 46, wherein the first limit blocks 46 are respectively provided at opposite ends of two inner holes 21 on the rotor, wherein the outer peripheral surface of the first limit block 46 is fitted with the peripheral surface of the inner hole 21, wherein the inner hole 21 provided with the first limit block 46 is a limit inner hole 211, and the other inner hole 21 is a measurement inner hole 212; a connecting rod 45, wherein the two limit inner holes 211 are respectively penetrated with the connecting rod 45, wherein the two ends of the connecting rod 45 respectively penetrate the first limit blocks 4 on both sides in sequence. 6 and the limit plate 41, the two ends of the connecting rod 45 are respectively screwed with locking nuts 44, and the two locking nuts 44 are respectively matched with the side surfaces opposite to the two limit plates 41; a measuring auxiliary block 42, one end of the measuring auxiliary block 42 is connected to the limit plate 41, and the other end of the measuring auxiliary block 42 extends out of the coverage range of the outer diameter of the impeller 2. When the outer diameter of the impeller 2 is processed, the end of the measuring auxiliary block 42 away from the measuring inner hole 212 can be processed into an arc-shaped structure, and the central axis of the arc-shaped structure, the central axis of the measuring inner hole 212, and the central axis of the rotor shaft 1 are parallel and in the same plane, and the arc-shaped structure is symmetrical about the plane.

[0061] During the processing of the outer diameter of the impeller 2, the end of the measuring auxiliary block 42 away from the measuring inner hole 212 can be processed into an arc-shaped structure. Since the central axis of the arc-shaped structure, the central axis of the measuring inner hole 212 and the central axis of the rotating shaft 1 are parallel and in the same plane, and the arc-shaped structure is symmetrical about the plane, when measuring the outer diameter of the impeller 2 during the processing, the farthest radial distance between the cylinder corresponding to the measuring inner hole 212 and the arc-shaped structure is measured with a length micrometer, and the outer diameter D of the impeller 2 can be measured without the aid of a dedicated three-point micrometer 3, which greatly reduces the measurement cost; the setting of the two measuring auxiliary blocks 42 provides two measurement opportunities to ensure the measurement accuracy; the two limit plates 41 are connected by a connecting rod 45, so that the two limit plates 41 can be firmly connected to the impeller 2, preventing the measurement auxiliary block 42 from moving during the cutting process of the measurement auxiliary block 42, thereby ensuring the measurement accuracy.

[0062] It should be noted that when machining the outer diameter of the rotor, the rotor is usually mounted on a lathe, the two ends of the rotating shaft 1 are positioned, the impeller 2 rotates, and the tool cuts the rotating impeller 2. In the present application, it is only necessary to set the measuring auxiliary block 42 to a suitable length and adjust the stroke of the tool, so that during the machining of the outer diameter of the rotor, the ends of the two measuring auxiliary blocks 42 can be machined into an arc-shaped structure with the same size as the outer diameter of the rotor.

[0063] In order to further prevent the measurement auxiliary block 42 from moving during the cutting process, the auxiliary unit 4 also includes a second limit block 47. The opposite ends of the connecting rod 45 are respectively fixed with a second limit block 47. The two second limit blocks 47 are respectively located between the two first limit blocks 46. The second limit block 47 and the inner hole 21 have a clearance fit, and the first limit block 46 and the inner hole 21 have a transition fit. The two first limit blocks 46 are respectively welded and fixed to the limit plate 41. The limit plate 41 and the first limit block 46 are respectively provided with a first limit through hole 461 that allows the connecting rod 45 to pass through. The outer diameter of the connecting rod 45 is smaller than the outer diameter of the first limit through hole 461.

[0064] The first limit block 46 is transitionally matched with the inner hole 21 , and the two first limit blocks 46 are respectively welded and fixed to the limit plates 41 , which can effectively prevent the measurement auxiliary block 42 from moving during the cutting process.

[0065] When assembling this embodiment, first insert the connecting rod 45 and the second limiting block 47 as a whole into the limiting inner hole 211, then insert the limiting plate 41 and the first limiting block 46 as a whole into the connecting rod 45, and then realize the transitional fit between the first limiting block 46 and the limiting inner hole 211 through the locking nut 44 until the limiting plate 41 contacts the end surface of the impeller 2. The above-mentioned method is not only fast and efficient, but also easy to realize the transitional fit between the first limiting block 46 and the limiting inner hole 211. It is worth noting that when operating the locking nuts 44, it is necessary to operate the four locking nuts 44 at the same time.

[0066] When disassembling this embodiment, the locking nut 44 is first removed, and by tapping the ends of the same side of the two connecting rods 45, the first limit block 46 and the limit inner hole 211 can be separated from each other under the thrust of the two second limit blocks 47 at a distance, which is quick and efficient.

[0067] The measuring auxiliary block 42 is installed in the following manner: the measuring auxiliary block 42 is located between the two limiting inner holes 211, the measuring auxiliary block 42 and the measuring inner hole 212 are located on opposite sides of the rotating shaft 1, a strip-shaped notch 421 is provided on the end face of the measuring auxiliary block 42 close to the measuring inner hole 212, two second limiting through holes 412 are provided on the limiting plate 41 in a direction away from the measuring inner hole 212, and the two second limiting through holes 412 are respectively connected to the notch 421 by bolts 43. The measuring auxiliary block 42 is installed in the above manner, and when the measuring auxiliary block 42 is used once, the position of the measuring auxiliary block 42 can be adjusted to a position where it can continue to be cut into the same arc-shaped structure when it is used next time, thereby further reducing the measurement cost.

[0068] Example 2

[0069] like Figure 10-Figure 16 As shown, the difference between the auxiliary structure for measuring the outer diameter of the fan rotor in this embodiment and that in Embodiment 1 lies in the structure of the limit plate 41 , the connection method between the limit plate 41 and the first limit block 46 , and the connection method between the limit plate 41 and the connecting rod 45 .

[0070] Specifically, the two opposite ends of the limiting plate 41 are provided with extensions, and the two first limiting blocks 46 correspond to the two extending parts one by one. The first limiting blocks 46 and the extending parts slide and limit along the vertical line direction of the two limiting inner holes 211. The two connecting rods 45 and the two extending parts correspond to each other one by one. The connecting rods 45 and the extending parts slide and limit along the vertical line direction of the two limiting inner holes 211 and can be locked by the locking nut 44. The extending part is provided with two first strip-shaped through grooves 413, and the first strip-shaped through grooves 413 extend along the vertical line direction of the two limiting inner holes 211. The end surface of the first limiting block 46 is provided with two square limiting protrusions 461, and the upper and lower end surfaces of the limiting protrusions 461 are respectively in contact with the first strip-shaped through grooves 413, and the limiting protrusions 461 slide and match with the first strip-shaped through grooves 413. The extension part is further provided with a second strip-shaped through groove 414, which extends in the direction of the vertical line connecting the central axes of the two limiting inner holes 211, and is arranged between the two first strip-shaped through grooves 413. The two opposite sides of the second strip-shaped through groove 414 are respectively fitted with the connecting rod 45, and the connecting rod 45 is slidably matched with the second strip-shaped through groove 414. The two extension parts are symmetrically arranged. The limiting protrusion 461 is located in the first strip-shaped through groove 413.

[0071] When the overall size of the impeller 2 becomes larger and the sizes of the three inner holes 21 also become larger, the two first limit blocks 46 are first replaced (in order to ensure that different first limit blocks 46 can cooperate with the two first strip-shaped through grooves 413, the different first limit blocks 46 are only different in the size of the outer circumference, and the size of the limit protrusion 461 and the relative position between the two limit protrusions 461 remain unchanged), and then the positions of the connecting rod 45 and the first limit block 46 are adjusted left and right, and the position of the measurement auxiliary block 42 is adjusted up and down. After adjustment, the installation principle of this embodiment is basically the same as the loading and unloading principle of Example 1. The only difference is that during assembly, the second limit block 47 cannot play the role of preliminary positioning of the connecting rod 45 in Example 1, but during disassembly, the second limit block 47 in this embodiment can still play the same role as in Example 1.

[0072] When the overall size of the impeller 2 becomes larger, but the sizes of the three inner holes 21 do not change, the positions of the connecting rod 45 and the first limit block 46 are directly adjusted left and right, and the position of the measurement auxiliary block 42 is adjusted up and down. After the adjustments are in place, the installation principle of this embodiment is the same as the loading and unloading principle of embodiment 1. Therefore, this embodiment can detect the outer diameters of fan rotors of different sizes, further reducing the measurement cost.

[0073] In order to prevent the two limit plates 41 from being cut when the tool is cutting the impeller 2 and the two measurement auxiliary blocks 42, protrusions 415 are respectively provided on the opposite sides of the two limit plates 41, and the two measurement auxiliary blocks 42 are respectively installed on the opposite sides of the two protrusions 415. The first limit block 46 is a stepped structure, and the first limit block includes a large diameter portion 462 and a small diameter portion 463. The small diameter portion 463 is transitionally matched with the inner hole 211 for limiting, and the large diameter portion 462 is located outside the inner hole 211 for limiting and matches with the end face of the impeller 2.

[0074] The present invention further provides a method for measuring the outer diameter of a fan rotor, using the fan rotor outer diameter measurement auxiliary structure in embodiment 1, the method for measuring the outer diameter of a fan rotor comprises:

[0075] S1, the connecting rod 45 and the two second limiting blocks 47 are inserted into the limiting inner hole 211 as a first integral body, and the two first integral bodies are respectively inserted into the two limiting inner holes 211;

[0076] S2, the limiting plate 211 and the two first limiting blocks 46 are plugged and matched with the connecting rod 45 as a second whole;

[0077] S3, the locking nuts 44 on the opposite sides of the impeller 2 are rotated at the same time, and under the action of the locking nuts 44, the first limit block 46 and the limit inner hole 211 form a transition fit until the two limit plates 41 are respectively fitted with the two end surfaces of the impeller 2;

[0078] S4, the first whole, the second whole, the impeller 2 and the measuring auxiliary block 42 are processed as a whole to process the outer diameter of the rotor, and the measuring auxiliary block 42 is processed into an arc-shaped structure;

[0079] S5. Use a length micrometer to measure the farthest radial distance between the cylinder and the arc-shaped structure corresponding to the measuring inner hole 212, and measure the outer diameter D of the impeller.

[0080] The present invention further provides a method for measuring the outer diameter of a fan rotor, using the fan rotor outer diameter measurement auxiliary structure in embodiment 2, the method for measuring the outer diameter of a fan rotor comprises:

[0081] S1, the connecting rod 45 and the two second limiting blocks 47 are inserted into the limiting inner hole 211 as a first integral body, and the two first integral bodies are respectively inserted into the two limiting inner holes 211;

[0082] S2, the first limiting blocks 46 are respectively preliminarily inserted into the corresponding limiting inner holes 21;

[0083] S3, the extension part is respectively plugged and matched with the corresponding limiting protrusion 461 and the connecting rod 45;

[0084] S4. The locking nuts 44 on the opposite sides of the impeller 2 are rotated at the same time. Under the action of the locking nuts 44, the small diameter portion 463 of the first limit block 46 and the limit inner hole 211 form a transition fit. While rotating the locking nuts 44, the position of the limit plates 41 is adjusted until the large diameter portions 462 of the two limit plates 41 are respectively fitted with the two end surfaces of the impeller 2, and the limit plates 41 are in a suitable position.

[0085] S5. Adjust the measurement auxiliary block 42 to a position where it can be processed into an arc-shaped structure along the radial direction of the impeller 2;

[0086] S6, the first whole, the first limit block 46, the limit plate 41, the impeller 2 and the measurement auxiliary block 42 are processed as a whole to process the outer diameter of the rotor, and the measurement auxiliary block 42 is processed into an arc-shaped structure;

[0087] S7. Use a length micrometer to measure the farthest radial distance between the cylinder and the arc-shaped structure corresponding to the measuring inner hole 212, and measure the outer diameter D of the impeller.

[0088] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A fan rotor outer diameter measurement auxiliary structure, comprising a rotor, It is characterized in that The fan rotor outer diameter measurement auxiliary structure further includes an auxiliary unit, and the auxiliary unit includes: A limiting plate, both end surfaces of the impeller on the rotor are attached with the limiting plate; A first limit block, wherein the first limit blocks are respectively disposed at opposite ends of the two inner holes on the rotor, and the outer circumference of the first limit block is in contact with the circumference of the inner hole, the inner hole with the first limit block is an inner hole for limiting, and the other inner hole is an inner hole for measuring; A connecting rod, wherein the two inner holes for limiting are respectively provided with the connecting rod, and the two ends of the connecting rod respectively pass through the first limiting blocks and the limiting plates on both sides in sequence, and the two ends of the connecting rod are respectively screwed with locking nuts, and the two locking nuts are respectively matched with the side surfaces of the two limiting plates that are away from each other; A measuring auxiliary block, one end of which is connected to the limit plate, and the other end of which extends out of the coverage range of the impeller outer diameter. When processing the impeller outer diameter, one end of the measuring auxiliary block away from the measuring inner hole can be processed into an arc-shaped structure. The central axis of the arc-shaped structure, the central axis of the measuring inner hole, and the central axis of the rotating shaft on the rotor are parallel and in the same plane, and the arc-shaped structure is symmetrical about the plane.

2. The auxiliary structure for measuring the outer diameter of a fan rotor according to claim 1, It is characterized in that The auxiliary unit also includes a second limit block, and the second limit blocks are fixedly mounted on the opposite ends of the connecting rod, and the two second limit blocks are respectively located between the two first limit blocks. The second limit block and the inner hole have a clearance fit, and the first limit block and the inner hole have a transition fit.

3. The fan rotor outer diameter measurement auxiliary structure according to claim 2, It is characterized in that The two first limiting blocks are respectively fixed to the limiting plates by welding.

4. The fan rotor outer diameter measurement auxiliary structure according to claim 3, It is characterized in that The limiting plate and the first limiting block are respectively provided with a first limiting through hole allowing the connecting rod to pass through, and the outer diameter of the connecting rod is smaller than the outer diameter of the first limiting through hole.

5. The fan rotor outer diameter measurement auxiliary structure according to claim 2, It is characterized in that The measuring auxiliary block is located between the two limiting inner holes, and the measuring auxiliary block and the measuring inner hole are located on opposite sides of the rotating shaft. A strip-shaped notch is provided on the end face of the measuring auxiliary block close to the measuring inner hole, and at least two second limiting through holes are spaced apart on the limiting plate in a direction away from the measuring inner hole, and at least two of the second limiting through holes are respectively connected to the notches by bolts.

6. The auxiliary structure for measuring the outer diameter of a fan rotor according to claim 5, It is characterized in that Extension parts are respectively provided at the opposite ends of the limiting plate, and the two first limiting blocks and the two extension parts correspond one to one. The first limiting blocks and the extension parts slide and limit along the direction of the vertical connection line of the two center axes of the inner holes for limiting, and the two connecting rods and the two extension parts correspond one to one. The connecting rods and the extension parts slide and fit along the direction of the vertical connection line of the two center axes of the inner holes for limiting and can be locked by the locking nut.

7. The fan rotor outer diameter measurement auxiliary structure according to claim 6, It is characterized in that The extension portion is provided with two first strip-shaped through grooves, and the first strip-shaped through grooves extend along the direction of the vertical connection line of the central axes of the two inner holes for limiting. The end face of the first limiting block is provided with two square limiting protrusions, and the upper and lower end faces of the limiting protrusions are respectively fitted with the first strip-shaped through grooves, and the limiting protrusions are slidably matched with the first strip-shaped through grooves.

8. The auxiliary structure for measuring the outer diameter of a fan rotor according to claim 7, It is characterized in that The extension portion is also provided with a second strip-shaped through groove, which extends along the direction of the vertical connection line of the central axes of the two inner holes for limiting, and the second strip-shaped through groove is arranged between the two first strip-shaped through grooves, and the opposite side surfaces of the second strip-shaped through groove are respectively fitted with the connecting rod, and the connecting rod is slidably matched with the second strip-shaped through groove.

9. A method for measuring the outer diameter of a fan rotor. It is characterized in that Using the auxiliary structure for measuring the outer diameter of a fan rotor according to claim 4, the method for measuring the outer diameter of a fan rotor comprises the following steps: The connecting rod and the two second limiting blocks are inserted into the limiting inner hole as a first integral body, and the two first integral bodies are respectively inserted into the two limiting inner holes; The limiting plate and the two first limiting blocks are plugged and matched with the connecting rod as a second whole; At the same time, the locking nuts on opposite sides of the impeller are rotated, and under the action of the locking nuts, the first limit block and the limit inner hole form a transition fit until the two limit plates are respectively fitted with the two end faces of the impeller; The first integral body, the second integral body, the impeller and the auxiliary measuring block are used as a whole to process the outer diameter of the rotor, and the auxiliary measuring block is processed into the arc-shaped structure; The longest radial distance between the cylinder corresponding to the measuring inner hole and the arc-shaped structure is measured using a length micrometer to measure the outer diameter D of the impeller.

10. A method for measuring the outer diameter of a fan rotor, It is characterized in that Using the auxiliary structure for measuring the outer diameter of a fan rotor according to claim 8, the method for measuring the outer diameter of a fan rotor comprises the following steps: The connecting rod and the two second limiting blocks are inserted into the limiting inner hole as a first integral body, and the two first integral bodies are respectively inserted into the two limiting inner holes; The first limiting blocks are respectively preliminarily inserted into the corresponding limiting inner holes; The extension part is plug-fitted with the corresponding limiting protrusion and the connecting rod respectively; The locking nuts on opposite sides of the impeller are rotated at the same time. Under the action of the locking nuts, the first limit block and the limit inner hole form a transition fit. While rotating the locking nuts, the positions of the limit plates are adjusted until the two limit plates are respectively fitted with the two end faces of the impeller and the limit plates are in a suitable position. Along the radial direction of the impeller, adjusting the measurement auxiliary block to a position where it can be processed into the arc-shaped structure; The first integral body, the first limiting block, the limiting plate, the impeller and the auxiliary measuring block are used as a whole to process the outer diameter of the rotor, and the auxiliary measuring block is processed into the arc-shaped structure; The longest radial distance between the cylinder corresponding to the measuring inner hole and the arc-shaped structure is measured using a length micrometer to measure the outer diameter D of the impeller.

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