Gear, rotor pair mounting structure and rotor pair meshing clearance adjusting method
By employing a tapered gear adjustment structure in the dry vacuum pump, the problem of difficult rotor meshing clearance adjustment was solved, achieving uniformity and stability of the meshing clearance and improving equipment performance and efficiency.
Patent Information
- Application Number
- CN202610052135.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-15
- Publication Date
- 2026-02-27
AI Technical Summary
In existing dry vacuum pumps, the meshing clearance of the rotor pair is difficult to adjust, which leads to gear misalignment, increased meshing noise, and affects equipment performance and efficiency.
By adopting an adjustable gear structure and using tapered fasteners to connect the gear and the end face pressure plate, the gear is ensured to be perpendicular to the mounting shaft, achieving uniformity and stability of the meshing clearance and simplifying the installation process.
It reduces meshing noise, ensures uniform meshing clearance, improves equipment performance and work efficiency, shortens adjustment time, and avoids reducing the strength of the mounting shaft.
Smart Images
Figure CN121576274A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vacuum pump technology, and in particular to a gear and rotor pair mounting structure and a method for adjusting the meshing clearance of the rotor pair for a dry vacuum pump. Background Technology
[0002] First, with increasingly stringent environmental protection requirements, dry vacuum pumps are being used more and more widely. Dry vacuum pumps are usually driven by motors, and the transmission methods include gear transmission or belt transmission, with gear transmission being the most common.
[0003] Secondly, the rotor pairs of dry vacuum pumps typically mesh with each other, with a gap between them. The phase and gap of this rotor pair are usually controlled by the transmission gears. During gear transmission, the gears need to be fixed to the shaft. The common practice is to use a key and lock nut or an expansion sleeve for positioning. Using a key and lock nut requires a keyway on the transmission shaft, which reduces the strength of the transmission shaft and requires a larger shaft diameter for the same requirements. While using an expansion sleeve can solve the problem of increasing the shaft diameter, during the positioning and locking process, incorrect bolt tightening sequence, uneven contact of the conical surfaces, differences in thermal expansion, and lubricant contamination can all cause the expansion sleeve to expand unevenly. This causes the gear to be misaligned under force, resulting in the gear positioning surface not being perpendicular to the shaft. This leads to gear eccentricity during installation, resulting in abnormal tooth surface contact, significantly increased meshing noise, and uneven gap between the rotor pairs during operation.
[0004] In summary, during the installation of dry vacuum pump equipment, adjusting the meshing clearance of the rotor pair and aligning and calibrating the gear installation position takes a lot of time and can easily affect the performance parameters of the equipment. Summary of the Invention
[0005] The purpose of this invention is to provide a gear and rotor pair mounting structure and a method for adjusting the meshing clearance of the rotor pair, so as to solve the problems existing in the prior art, keep the positioning surface of the adjusting gear perpendicular to the mounting shaft, ensure good meshing between the adjusting gear and the fixed gear, reduce meshing noise during operation, keep the rotor pair meshing clearance uniform, shorten the time for adjusting the rotor pair meshing clearance, and calibrate the mounting position of the adjusting gear, thereby improving work efficiency.
[0006] To achieve the above objectives, the present invention provides the following solution: A gear mounting structure includes an adjusting gear, wherein the adjusting gear has a first through hole coaxial with the adjusting gear in its middle portion for mounting a mounting shaft; the adjusting gear has an annular groove on its outer end face for inserting an end face pressure plate; an annular boss is formed in the area of the annular groove near the first through hole, and the outer side of the annular boss has a taper; a first mounting hole is provided on the annular groove; an end face pressure plate has a second through hole in its middle portion for accommodating the annular boss, and the inner side of the second through hole has a taper, the taper of the inner side of the second through hole being the same as the taper of the outer side of the annular boss; the end face pressure plate also has a second mounting hole configured to coaxially engage with the first mounting hole for inserting fasteners.
[0007] In an exemplary embodiment, the annular groove is provided with at least two first mounting holes, which are evenly distributed along the circumferential direction and located on the outer side of the annular boss; The end face pressure plate is provided with at least two second mounting holes, which are evenly distributed along the circumferential direction and located outside the second through hole.
[0008] In an exemplary embodiment, the taper of the outer side of the annular boss is the same as the taper of the inner side of the second through hole, and the taper angle is 3°-7°.
[0009] In an exemplary embodiment, both the first mounting hole and the second mounting hole are threaded holes, and the fastener is a screw or bolt.
[0010] In an exemplary embodiment, the inner end face of the adjusting gear is also provided with the annular groove, and the annular groove on the inner end face of the adjusting gear is mirror-symmetrically arranged with the annular groove on the outer end face of the adjusting gear; an end face pressure plate is also installed in the annular groove on the inner end face of the adjusting gear, and the end face pressure plate installed in the annular groove on the inner end face of the adjusting gear is also mirror-symmetrically arranged with the end face pressure plate installed in the annular groove on the outer end face of the adjusting gear.
[0011] In an exemplary embodiment, the mounting shaft is provided with a positioning boss, and the inner end face of the adjusting gear abuts against the positioning boss.
[0012] A rotor pair mounting structure includes the aforementioned gear mounting structure; a rotor A with a fixed axial position; and a rotor B with an adjustable axial position, wherein the rotor A and the rotor B mesh to form a rotor pair, and the shaft of the rotor B is the mounting shaft.
[0013] In one exemplary embodiment, the shaft of the rotor A is connected to the fixed gear via a key and a pressure plate.
[0014] A method for adjusting the meshing clearance of a rotor includes the following steps: S1. Mounting the end face pressure plate and the adjusting gear onto the shaft of rotor B, and pre-tightening the fasteners; or loosening the fasteners, rotating the adjusting gear to disengage it from the fixed gear, so that rotor B is in a state where its axial and circumferential positions are adjustable; S2. Adjusting the meshing clearance C between rotor A and rotor B to the designed state; S3. Rotating the adjusting gear to mesh with the fixed gear, and making the inner end face of the adjusting gear abut against the positioning boss on the shaft of rotor B, tightening the fasteners, and fixing the axial position of rotor B.
[0015] In an exemplary embodiment, in S2, the meshing clearance C between the rotor A and the rotor B is measured using a feeler gauge.
[0016] The present invention achieves the following technical effects compared to the prior art: Because both the inner surface of the second through hole and the outer surface of the annular boss are tapered, the first through hole of the adjusting gear always mates with the mounting shaft during the fastener connection process, ensuring high positioning accuracy. This reduces the risk of the adjusting gear tilting, which could cause the mounting shaft and adjusting gear to become non-perpendicular, while maintaining good meshing between the teeth of the adjusting gear and the fixed gear. This reduces operating noise, ensures uniform meshing clearance between the rotor pairs during operation, and improves the stability of equipment performance parameters. It also reduces the time spent aligning and calibrating the gear installation position, improving adjustment efficiency. Furthermore, it does not reduce the strength of the mounting shaft, solving the problem of needing to increase the shaft diameter and meeting the requirements for lightweight design. In addition, there is no need to set keyways, bosses, or other mounting structures on the mounting shaft; the adjusting gear can be installed at any part of the mounting shaft. Compared to existing technologies where the adjusting gear can only be installed at specific positions on the mounting shaft, this method has a wider range of applications. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the rotor pair installation structure disclosed in a specific embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure at point AA; Figure 3 This is a schematic diagram of the adjusting gear according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the inner end pressure plate disclosed in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the outer end pressure plate disclosed in a specific embodiment of the present invention.
[0019] Among them, 1. Adjusting gear; 2. Inner end pressure plate; 3. Outer end pressure plate; 4. Fastener; 5. Rotor B; 6. Fixed gear; 7. Rotor A; 8. Annular groove; 9. First through hole; 10. Annular boss; 11. First mounting hole; 12. Second mounting hole; 13. Second through hole; 14. Positioning boss. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] Please refer to Figures 1 to 5 The present invention provides a gear mounting structure, including an adjusting gear 1, an end face pressure plate, and a fastener 4.
[0023] refer to Figure 3The adjusting gear 1 has a first through hole 9 coaxial with the adjusting gear 1 in its middle part. The first through hole 9 is used to insert the mounting shaft, which will be described in detail below. The mounting shaft is driven to rotate by the friction between the inner side of the first through hole 9 and the mounting shaft. The outer end face of the adjusting gear 1 has an annular groove 8, which is used to insert the end face pressure plate, which will be described in detail below. An annular boss 10 is formed in the area of the annular groove 8 near the first through hole 9. The first through hole 9 is located inside the annular boss 10. The outer side of the annular boss 10 has a taper, and its taper angle is usually between 3 and 7 degrees. It can be appropriately adjusted according to the material friction coefficient and its operating conditions. In one embodiment, its taper is 1:10. The outer side of the annular boss 10 is used to mate with the inner side of the second through hole 13 of the end face pressure plate, which will be described in detail below. The wall thickness of the annular boss 10 is evenly distributed at different positions so as to apply a uniform clamping force to the mounting shaft when clamping it, and to avoid bending deformation of the mounting shaft. Furthermore, the clamping force between the adjusting gear 1 and the mounting shaft can be changed by adjusting the size and wall thickness of the annular boss 10 to adapt to different working conditions. The large end of the annular boss 10 is connected to the bottom surface of the annular groove 8, and the small end of the annular boss 10 is a free end to improve the structural stability of the annular boss 10. The annular groove 8 is also provided with a first mounting hole 11, which is a through hole penetrating both ends of the adjusting gear 1. The first mounting hole 11 is located on the outside of the annular boss 10 and is used to install the fastener 4.
[0024] The end face pressure plate has a second through hole 13 in the middle. The inner surface of the second through hole 13 is tapered, and the tapering of the inner surface is the same as the tapering of the outer surface of the annular boss 10. The second through hole 13 is used to accommodate the annular boss 10 of the adjusting gear 1. The end face pressure plate has a second mounting hole 12, which is configured to coaxially engage with the first mounting hole 11. When it is necessary to connect the adjusting gear 1 and the mounting shaft, the fastener 4 passing through the first mounting hole 11 and the second mounting hole 12 is tightened. The fastener 4 applies a force to the end face pressure plate and transmits the force to the annular boss 10 through the second through hole 13. The annular boss 10 deforms to hold the mounting shaft, thereby realizing the connection between the adjusting gear 1 and the mounting shaft. Since both the inner side of the second through hole 13 and the outer side of the annular boss 10 are tapered, when tightening the fastener 4, the inner side of the second through hole 13 can always be in close contact with the outer side of the annular boss 10, so that the annular boss 10 applies a clamping force evenly to the mounting shaft. This avoids uneven force on different positions of the mounting shaft, which could cause the mounting shaft to become skewed, resulting in the gear positioning surface not being perpendicular to the mounting shaft, and thus causing abnormal tooth meshing, increased meshing noise, and uneven rotor meshing clearance C.
[0025] In one embodiment, the annular groove 8 is provided with at least two first mounting holes 11, which are evenly distributed along the circumference of the annular groove 8 and located outside the annular boss 10, such as... Figure 3In the embodiment shown, eight first mounting holes 11 are evenly distributed along the circumferential direction on the annular groove 8 on the outer end face of the adjusting gear 1; at least two second mounting holes 12 are provided on the end face pressure plate, the second mounting holes 12 are evenly distributed along the circumference of the end face pressure plate and are located outside the second through hole 13, such as... Figure 4 , Figure 5 In the embodiment shown, eight second mounting holes 12 are evenly distributed along the circumference on the end face pressure plate. By evenly distributing several mounting holes along the circumference, the force on the mounting shaft is evenly distributed at all points in the radial direction, thus preventing bending deformation of the mounting shaft.
[0026] It should be noted that: the inner side refers to the side closest to the center area of the adjusting gear 1 or the end face pressure plate, and the outer side refers to the side closest to the outer side of the adjusting gear 1 or the end face pressure plate.
[0027] In one embodiment, the first mounting hole 11 and the second mounting hole 12 are both threaded holes, and the fastener 4 is a screw or bolt.
[0028] In one embodiment, the inner end face of the adjusting gear 1 is also provided with an annular groove 8, and the annular groove 8 on the inner end face is mirror-symmetrically arranged with the annular groove 8 on the outer end face. An end face pressure plate is also installed in the annular groove 8 on the inner end face. For ease of description, the end face pressure plate installed on the inner end face is called the inner end pressure plate 2, and the end face pressure plate installed on the outer end face is called the outer end pressure plate 3. The inner end pressure plate 2 and the outer end pressure plate 3 are also mirror-symmetrically arranged. During installation, the fastener 4 passes through the outer end pressure plate 3, the adjusting gear 1, and the inner end pressure plate 2, so that the outer end pressure plate 3 presses against the annular boss 10 on the outer end face of the adjusting gear 1, and the inner end pressure plate 2 presses against the annular boss 10 on the inner end face of the adjusting gear 1. This makes the force on different positions of the mounting shaft more uniform, ensuring the perpendicularity of the end face of the adjusting gear 1 to the mounting shaft and the concentricity of the outer circle of the adjusting gear 1 to the mounting shaft, so that the gear meshes well and avoids the problem of uneven meshing clearance between the rotor pairs, which affects the working performance of the dry vacuum pump equipment.
[0029] It should be noted that: the outer end face of the adjusting gear 1 refers to the end face of the adjusting gear 1 that is away from the rotor B5 which is described in detail below and has meshing teeth, while the inner end face refers to the end face of the adjusting gear 1 that is close to the rotor B5 which is described in detail below and has meshing teeth.
[0030] In one embodiment, a positioning boss 14 is provided on the mounting shaft, and the inner end face of the adjusting gear 1 abuts against the positioning boss 14 to perform axial limiting and improve the stability of the axial position of the adjusting gear 1.
[0031] Continue to refer to Figure 1The present invention also provides a rotor pair mounting structure, including the gear mounting structure described above, rotor A7, and rotor B5, wherein rotor A7 and rotor B5 mesh to form a rotor pair, the axial position of rotor A7 is fixed, and the axial position of rotor B5 is adjustable. By changing the axial position of rotor B5, the meshing clearance between rotor A7 and rotor B5 is adjusted.
[0032] See Figure 1 Rotors A7 and B5 have meshing teeth on one side and a connecting shaft on the other side. In one embodiment, rotors A7 and B5 are screw rotors. The connecting shaft of rotor B5 is the mounting shaft described above, which is connected to the adjusting gear 1 through the outer end pressure plate 3, the annular boss 10 on the outer end face of the adjusting gear 1, and the fastener 4; or it is connected to the adjusting gear 1 through the outer end pressure plate 3, the inner end pressure plate 2, the annular boss 10 on the outer end face of the adjusting gear 1, the annular boss 10 on the inner end face of the adjusting gear 1, and the fastener 4. The shaft of rotor A7 is connected to the fixed gear 6 through a key and a pressure plate. When it is necessary to adjust the meshing clearance between rotor A7 and rotor B5, the connection between rotor A7 and fixed gear 6 remains unchanged. Loosen fastener 4 so that the shaft of adjusting gear 1 and rotor B5 is in a loose fit, and rotor B5 is in an axially adjustable state. After the adjustment is completed, tighten fastener 4 so that the shaft of adjusting gear 1 and rotor B5 is restored to a tight fit (at this time, the rotor is fully positioned, and adjusting gear 1 and fixed gear 6 are in a meshing state).
[0033] The present invention also provides a method for adjusting the meshing clearance of rotor pairs, applied to the rotor pair mounting structure described above, and in one embodiment, including the following: S1. Mount the end face pressure plate and adjusting gear 1 onto the shaft of rotor B5, and pre-tighten fastener 4; S2. Adjust the meshing clearance between rotor A7 and rotor B5 to the design state; S3. Rotate the adjusting gear 1 until it meshes with the fixed gear 6, and make the inner end face of the adjusting gear 1 abut against the positioning boss 14 on the rotor B5 shaft. Tighten the fastener 4 to fix the axial position of the rotor B5.
[0034] This adjustment method is applicable to the initial installation of rotor B5.
[0035] In another embodiment, the rotor pair meshing clearance adjustment method includes the following: S1. Loosen the fastener 4, rotate the adjusting gear 1 to disengage the adjusting gear 1 from the fixed gear 6, and the shaft of rotor B5 is in an adjustable state in both axial and circumferential directions. S2. Adjust the meshing clearance between rotor A7 and rotor B5 to the design state; S3. Rotate the adjusting gear 1 until it meshes with the fixed gear 6, and make the inner end face of the adjusting gear 1 abut against the positioning boss 14 on the rotor B5 shaft. Tighten the fastener 4 to fix the axial position of the rotor B5.
[0036] This adjustment method is applicable when the meshing clearance between rotor A7 and rotor B5 deviates from the design state during equipment operation, and it is necessary to readjust the meshing clearance between rotor A7 and rotor B5 to the design state.
[0037] The following description applies to both of the above embodiments, wherein in S2, the meshing clearance between rotor A7 and rotor B5 is measured by a feeler gauge.
[0038] In S1, for the case where only the annular groove 8 is provided on the outer end face of the adjusting gear 1, the outer end pressure plate 3 and the adjusting gear 1 are sleeved on the shaft of the rotor B5, so that the second through hole 13 of the outer end pressure plate 3 cooperates with the outer side of the annular boss 10 on the outer end face of the adjusting gear 1, and the fastener 4 is inserted into the outer end pressure plate 3 and the adjusting gear 1, and the fastener 4 is pre-tightened. When the outer end face and inner end face of the adjusting gear 1 are both provided with annular grooves 8, the outer end pressure plate 3, the adjusting gear 1, and the inner end pressure plate 2 are fitted onto the shaft of the rotor B5, so that the second through hole 13 of the outer end pressure plate 3 mates with the outer side of the annular boss 10 on the outer end face of the adjusting gear 1, and the second through hole 13 of the inner end pressure plate 2 mates with the outer side of the annular boss 10 on the inner end face of the adjusting gear 1. Fasteners 4 are inserted into the outer end pressure plate 3, the adjusting gear 1, and the inner end pressure plate 2, and the fasteners 4 are pre-tightened.
[0039] The shaft of rotor A7 is connected to the fixed gear 6 via a key and a pressure plate.
[0040] When adjusting the meshing clearance between rotor A and rotor B in S2, the axial position of rotor A7 remains unchanged, and only the axial position of rotor B5 is adjusted.
[0041] When adjusting the position of adjusting gear 1 in S3, keep the axial position of rotor B5 unchanged.
[0042] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention, and do not imply or require that the device or element referred to must have a specific orientation or construction method, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish the objects of description and should not be construed as limiting importance or order, and the features defined by such terms may explicitly or implicitly include one or more of those features. Unless otherwise stated, "a plurality of" in the description of this invention refers to two or more.
[0043] The terms "installation," "connection," and "joining" should be interpreted broadly, unless otherwise explicitly defined, to include, but are not limited to, fixed connections, detachable connections, or integrally formed connections; mechanical or electrical connections; direct connections or indirect connections via an intermediate medium; and internal communication between two components. Those skilled in the art can understand their meaning based on the specific technical solution. The fixed connections involved in this invention, unless otherwise stated, include both detachable fixed connections (such as bolt and screw connections) and non-detachable fixed connections (such as riveting and welding), and may also include integral structures achieved through an integral forming process (such as casting) (except where integral forming is clearly not feasible).
[0044] Unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes cover states or shapes that are similar to, close to, or nearly similar to those states or shapes.
[0045] Any component provided by the present invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.
[0046] It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.
[0047] In the embodiments of this application, the same reference numerals are used to denote the same component or part.
[0048] Any adaptive changes made according to actual needs are within the scope of protection of this invention.
[0049] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A gear mounting structure, characterized in that: include An adjusting gear is provided in the middle of the adjusting gear, which has a first through hole coaxial with the adjusting gear. The first through hole is used to assemble and install a shaft. The outer end face of the adjusting gear has an annular groove for inserting an end face pressure plate. An annular boss is formed in the area of the annular groove near the first through hole. The outer side of the annular boss has a taper. A first mounting hole is also provided on the annular groove. An end face pressure plate is provided with a second through hole in the middle for accommodating the annular boss. The inner side of the second through hole has a taper, and the taper of the inner side of the second through hole is the same as the taper of the outer side of the annular boss. The end face pressure plate is also provided with a second mounting hole, which is configured to coaxially cooperate with the first mounting hole for inserting fasteners.
2. The gear mounting structure according to claim 1, characterized in that: The annular groove is provided with at least two first mounting holes, which are evenly distributed along the circumferential direction and located on the outside of the annular boss. The end face pressure plate is provided with at least two second mounting holes, which are evenly distributed along the circumferential direction and located outside the second through hole.
3. The gear mounting structure according to claim 2, characterized in that: The taper of the outer side of the annular boss is the same as the taper of the inner side of the second through hole, and its taper angle is 3°-7°.
4. The gear mounting structure according to claim 3, characterized in that: Both the first mounting hole and the second mounting hole are threaded holes, and the fastener is a screw or bolt.
5. The gear mounting structure according to any one of claims 1 to 4, characterized in that: The inner end face of the adjusting gear is also provided with the annular groove, and the annular groove on the inner end face of the adjusting gear is mirror-symmetrically arranged with the annular groove on the outer end face of the adjusting gear; an end face pressure plate is also installed in the annular groove on the inner end face of the adjusting gear, and the end face pressure plate installed in the annular groove on the inner end face of the adjusting gear is mirror-symmetrically arranged with the end face pressure plate installed in the annular groove on the outer end face of the adjusting gear.
6. The gear mounting structure according to claim 5, characterized in that: The mounting shaft is provided with a positioning boss, and the inner end face of the adjusting gear abuts against the positioning boss.
7. A rotor pair mounting structure, characterized in that: Includes the gear mounting structure as described in claim 6; Rotor A with a fixed axial position; A rotor B with adjustable axial position, wherein rotor A and rotor B mesh to form a rotor pair, and the shaft of rotor B is the mounting shaft.
8. The rotor pair mounting structure according to claim 7, characterized in that: The shaft of rotor A is connected to the fixed gear via a key and a pressure plate.
9. A method for adjusting the meshing clearance of a rotor pair, characterized in that: The rotor pair mounting structure applied to claim 8 includes the following: S1. Mount the end face pressure plate and the adjusting gear on the shaft of the rotor B, and pre-tighten the fasteners; or loosen the fasteners, rotate the adjusting gear, so that the adjusting gear disengages from the fixed gear, and the rotor B is in a state where the axial and circumferential positions are adjustable; S2. Adjust the meshing clearance between rotor A and rotor B to the designed state; S3. Rotate the adjusting gear to mesh with the fixed gear, and make the inner end face of the adjusting gear abut against the positioning boss on the shaft of the rotor B. Tighten the fastener to fix the axial position of the rotor B.
10. The rotor pair meshing clearance adjustment method according to claim 9, characterized in that: In S2, the meshing clearance between rotor A and rotor B is measured using a feeler gauge.