Dry vacuum pump equipment positioning structure and assembling method
By employing a combination structure of fixed parts, moving parts, cylindrical pins, and diamond pins in the dry vacuum pump equipment, along with a vent design, the problems of misalignment and air cushion effect are solved, achieving high-precision and high-speed assembly.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-15
- Publication Date
- 2026-03-10
AI Technical Summary
During the assembly of dry vacuum pump equipment, the gap between the rotor and the housing has a significant impact on the equipment's performance parameters. This is especially true during multi-stage assembly, where conventional positioning methods can lead to misalignment, low efficiency, and an air cushion effect that affects assembly quality.
The system employs a combination structure consisting of fixed parts, movable parts, a first positioning part, and a second positioning part. By setting vent holes inside the positioning parts to discharge gas, and combining the cooperation of cylindrical pins and diamond pins, the rotation and position of the movable parts are restricted, thereby improving assembly accuracy.
The air cushion effect was eliminated, improving assembly accuracy and efficiency, and ensuring the positioning accuracy and assembly quality of multi-stage assembly equipment.
Smart Images
Figure CN121630690A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vacuum pump equipment, in particular to a dry vacuum pump equipment positioning structure and an assembling method BACKGROUND
[0002] With the development of industry, environmental pollution has become the first problem to be solved, which requires the equipment used to have an environmental protection function, and the polluted gas or liquid can be recycled during the operation of the equipment to reduce the pollution to the environment. The water ring pump uses water as the working medium, and needs to continuously supplement cooling water during operation, and at the same time, wastewater containing impurities of the pumped gas is generated, the wastewater treatment cost is expensive, and at the same time, the surrounding environment is also polluted; there is a gap between the running parts of the dry vacuum pump and the shell, and there is no friction between the running parts and the shell, the vacuum cavity is closed, there is no pollution, and only materials pass through the flow surface, no other substances, and it is good to recycle, so the water ring pump is gradually replaced by the dry vacuum pump.
[0003] However, the gap between the rotor and the shell has a great influence on the performance parameters of the equipment during the assembly process of the dry vacuum pump equipment, so the position accuracy of the equipment during the assembly process is very important, especially for the equipment that needs to be assembled in multiple stages, this link is particularly important.
[0004] During the assembly process of the conventional vacuum pump, a cylindrical pin is used for positioning, and since some mounting holes are blind holes, the gas pressed into the blind hole during assembly cannot be discharged to form an "air cushion effect", so the pin position during assembly will be incorrect, thereby affecting the assembly quality and efficiency. SUMMARY
[0005] The purpose of the present application is to provide a dry vacuum pump equipment positioning structure and an assembling method to solve the problems existing in the prior art and improve the assembly accuracy and efficiency between movable parts and fixed parts, especially for equipment that needs to be assembled in multiple stages.
[0006] To achieve the above purpose, the present application provides the following solutions: The application discloses a dry vacuum pump equipment positioning structure which comprises a fixed part, a movable part, a first positioning part and a second positioning part.
[0007] In an exemplary embodiment, the first positioning part is a cylindrical pin, the positioning hole coupled with the cylindrical pin is a round hole, the cylindrical pin is matched with the round hole for radial limiting, the second positioning part is a rhombic pin, the positioning hole coupled with the rhombic pin is a round hole, and the rhombic pin is matched with the round hole for limiting rotation of the movable part.
[0008] In an exemplary embodiment, a tangent plane passing through the outermost side of the outer surface of the rhombic pin is parallel to a plane passing through the central axis of the rhombic pin and the central axis of the cylindrical pin.
[0009] In an exemplary embodiment, the mounting part of the first positioning part and the mounting part of the second positioning part are transitionally matched with the mounting holes coupled therewith.
[0010] In an exemplary embodiment, the mounting part and the positioning part of the first positioning part and the mounting part and the positioning part of the second positioning part are provided with guide angles.
[0011] In an exemplary embodiment, flanges are arranged between the mounting part and the positioning part of the first positioning part and between the mounting part and the positioning part of the second positioning part, the two mounting holes are stepped holes, and the end faces of the flanges of the first positioning part and the second positioning part are respectively matched with the stepped faces of the stepped holes into which the flanges are respectively arranged.
[0012] The application further provides another technical scheme: An assembly method of a dry vacuum pump equipment positioning structure, comprising a fixed part, a movable part, a first positioning part and a second positioning part, comprising the following contents: S1. Assembling the mounting part of the first positioning part and the mounting part of the second positioning part to the mounting hole of each; S2. Aligning the two positioning holes of the movable part with the positioning part of the first positioning part and the positioning part of the second positioning part respectively, and pressing the movable part to complete the assembly of the movable part and the fixed part.
[0013] In an exemplary embodiment, the first positioning part in S1 is a cylindrical pin, and the second positioning part is a rhombic pin, and after the second positioning part is assembled into the mounting hole, the tangent plane passing through the outermost side of the outer surface of the rhombic pin is parallel to the plane passing through the central axis of the rhombic pin and the central axis of the cylindrical pin.
[0014] In an exemplary embodiment, the mounting part of the first positioning part and the mounting part of the second positioning part are both transitionally fitted with the mounting hole coupled thereto and are assembled by pressing.
[0015] In an exemplary embodiment, flanges are arranged between the mounting part and the positioning part of the first positioning part and between the mounting part and the positioning part of the second positioning part, and the two mounting holes are both stepped holes, and the end surface of the flange of the first positioning part and the end surface of the flange of the second positioning part are respectively attached to the stepped surface of the stepped hole into which they are assembled after assembly.
[0016] The present application has the following technical effects relative to the prior art: The ventilation holes are arranged in the first positioning part and the second positioning part to discharge the gas in the blind hole and / or the gas pressed in during assembly, eliminate the "air cushion effect", and prevent the first positioning part and the second positioning part from tilting or deviating in the hole during assembly, thereby improving the installation precision of the first positioning part and the second positioning part, cooperating with the limiting effect of the first positioning part and the second positioning part on the movable part to improve the installation position precision of the movable part relative to the fixed part, improve the assembly efficiency, and reduce the problems caused by the assembly precision in the equipment assembly process. The present application is particularly suitable for equipment that needs multi-stage assembly, and the improvement of assembly quality and the improvement of assembly efficiency are more obvious.
[0017] The other technical solutions disclosed in the present application also have the following technical advantages: The circular positioning hole cooperates with the cylindrical pin to limit the radial position of the movable part, the circular positioning hole cooperates with the rhombic pin to limit the rotation freedom of the movable part around the axis of the positioning hole, the flange end surface of the first positioning part and the second positioning part cooperates with the stepped surface of the stepped hole in which the first positioning part and the second positioning part are respectively installed, so that the fitting length of the positioning part in the fixed part and the movable part can be limited, thereby reducing the problem of reduced positioning accuracy caused by too short positioning length. The above can greatly improve the assembly accuracy of the movable part, simplify the installation process, reduce the assembly error and improve the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.
[0019] Figure 1 A structure diagram of the positioning structure of the dry vacuum pump device disclosed in an embodiment of the present application is shown in the figure. Figure 2 A structure diagram of the positioning structure of the dry vacuum pump device disclosed in an embodiment of the present application is shown in the figure. Figure 1 A sectional structure diagram of A-A in the figure is shown in the figure. Figure 3 A structure diagram of the positioning structure of the dry vacuum pump device disclosed in an embodiment of the present application is shown in the figure. Figure 2 An enlarged structure diagram of B in the figure is shown in the figure. Figure 4 A structure diagram of the first positioning part disclosed in an embodiment of the present application is shown in the figure. Figure 5 A structure diagram of the second positioning part disclosed in an embodiment of the present application is shown in the figure. 1, movable part; 2, first positioning part; 3, fixed part; 4, second positioning part; 5, positioning hole; 6, mounting hole; 7, stepped surface; 8, mounting portion of the first positioning part; 9, flange of the first positioning part; 10, positioning portion of the first positioning part; 11, mounting portion of the second positioning part; 12, flange of the second positioning part; 13, positioning portion of the second positioning part; 14, air hole of the first positioning part; 15, air hole of the second positioning part. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present specification. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.
[0021] In order to make the above objectives, characteristics and advantages of the present application more apparent, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0022] Please refer to Figures 1 to 5 The present embodiment provides a dry vacuum pump equipment positioning structure, which comprises a fixed part 3, a movable part 1, a first positioning part 2 and a second positioning part 4.
[0023] The fixed part 3 is the mounting reference of the movable part 1. Two mounting holes 6 are formed on the fixed part 3. The two mounting holes 6 can be through holes, blind holes, or both through holes and blind holes. The two mounting holes 6 are respectively used for accommodating the mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part, which will be described in detail below.
[0024] In an embodiment, the mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part form a transition fit with the mounting hole 6 in which each of them is mounted. When assembling, the mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part are respectively pressed into the respective mounting hole 6. At this time, the shape of the mounting hole 6 matches the shape of the respective assembled mounting part, i.e. if the mounting part is a regular shape such as a cylindrical shape, an oval shape, a cross shape, a square shape, etc., the mounting hole 6 is a regular shape hole such as a cylindrical hole, an oval hole, a cross hole, a square hole, etc. which matches it, and if the mounting part is an irregular special shape, the mounting hole 6 is a special hole which matches it.
[0025] Figure 1 The two mounting holes 6 in the sectional view of the illustrated embodiment are both cylindrical blind holes, and form a transition fit with the mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part which will be described in detail below.
[0026] The movable part 1 is mounted on the fixed part 3, and the movable part 1 is provided with two positioning holes 5, which are coaxially matched with the mounting holes 6, so that the positioning parts 10 of the first positioning part and the positioning parts 13 of the second positioning part can be accurately inserted into the respective positioning holes 5, which will be described in detail below. The two positioning holes 5 can be through holes, blind holes, or both through holes and blind holes. Usually, the two positioning holes 5 are cylindrical holes. In order to avoid over-positioning, one positioning hole 5 can be a cylindrical hole, and the other positioning hole 5 can be an oval hole, a long hole, etc. Figure 1 In the cross-sectional view of the illustrated embodiment, both of the positioning holes 5 are circular holes.
[0027] The first positioning part 2 and the second positioning part 4 are each provided with an installation part and a positioning part at the axial ends thereof. The installation part is fitted into the mounting hole 6 of the fixed part 3, and the positioning part is fitted into the positioning hole 5 of the movable part 1. The two positioning parts together define the mounting position of the movable part 1 relative to the fixed part 3.
[0028] In an embodiment, as Figure 4 , the first positioning part 2 is a cylindrical pin, i.e., the installation part and the positioning part are both cylindrical bodies; as Figure 5 , the second positioning part 4 is a rhombic pin, i.e., the installation part is a cylindrical body, and the positioning part is a column with a truncated rhombic cross-section. Both of the positioning holes 5 are cylindrical holes. After the cylindrical pin and the positioning hole 5 are assembled, they are used for radial limiting. The installation direction of the rhombic pin meets the following requirements: the tangent plane P1 passing through the outermost point of the circular arc surface of the rhombic pin, and the plane P2 passing through the center axis of the rhombic pin and the center axis of the cylindrical pin. After installation, the tangent plane P1 should be parallel to the plane P2, which can also be understood as the long axis of the rhombic cross-section of the rhombic pin being perpendicular to the plane P2 after installation. After the rhombic pin and the positioning hole 5 are assembled, they are used to limit the rotational freedom of the movable part 1 around the center axis. By setting the cylindrical pin and the rhombic pin to limit the mounting position of the movable part 1 relative to the fixed part 3, the installation precision is improved.
[0029] In another embodiment, the first positioning part 2 can also be other forms of special-shaped cylindrical pins, such as the installation part being a column with an elliptical, square, cross-shaped, or other irregular cross-section, and the positioning part being a cylindrical pin. The second positioning part 4 can also be other forms of special-shaped rhombic pins, such as the installation part being a column with an elliptical, square, cross-shaped, or other irregular cross-section, and the positioning part being a column with a truncated rhombic cross-section. Both of the positioning holes 5 are cylindrical holes. The installation requirements of the special-shaped rhombic pin are the same as in the previous embodiment.
[0030] In another embodiment, the first positioning part 2 can be a cylindrical pin or a special-shaped cylindrical pin (same as in the second embodiment), the second positioning part 4 can be a rhombic pin or a special-shaped rhombic pin (same as in the second embodiment), the positioning hole 5 matched with the cylindrical pin or the special-shaped cylindrical pin is a cylindrical hole, and the positioning hole 5 matched with the rhombic pin or the special-shaped rhombic pin is one of an elliptical hole, a long strip hole and the like, and the short axis of the elliptical hole or the long strip hole is matched with the long axis of the rhombic section of the rhombic pin, so that the rhombic pin or the special-shaped rhombic pin can be used to limit the freedom of rotation of the movable part 1 around the central axis.
[0031] The first positioning part 2 and the second positioning part 4 are each provided with a ventilation hole penetrating through the mounting part and the positioning part thereof, the axis of the ventilation hole 14 of the first positioning part is preferably parallel to the central axis thereof, and the axis of the ventilation hole 15 of the second positioning part is preferably parallel to the central axis thereof. When the first positioning part 2, the second positioning part 4, the fixed part 3 and the movable part 1 are assembled, the ventilation holes are used to discharge the gas existing in the mounting hole 6 and / or the positioning hole 5 during assembly, so as to avoid the inclination or deviation of the first positioning part 2 and the second positioning part 4, and improve the assembly quality and efficiency of the parts.
[0032] The ventilation hole 14 of the first positioning part and the ventilation hole 15 of the second positioning part are each provided with an internal thread. When the first positioning part 2 and the second positioning part 4 are removed, a tool with an external thread on the outer surface is screwed into the ventilation hole, and then the positioning part is pulled outwards, so that the outer surface of the first positioning part 2 and the second positioning part 4 can be avoided from being damaged. When the positioning part is repeatedly used, the positioning accuracy will not be affected due to the damage of the positioning surface of the positioning part.
[0033] The mounting part and the positioning part of the first positioning part 2 and the mounting part and the positioning part of the second positioning part 4 are each provided with a guide angle for guiding the assembly of the first positioning part 2 and the second positioning part 4 to the fixed part 3 and the movable part 1. The value range of the guide angle is 15°~20°. The length of the guide angle is 3~5mm, which plays a guiding role during installation and is more conducive to installation.
[0034] The mounting part and the positioning part of the first positioning part 2 are provided with a flange, the mounting part and the positioning part of the second positioning part 4 are provided with a flange, and the mounting hole 6 matched with the two positioning parts in the fixed part 3 is a stepped hole. The end surface of the flange 9 of the first positioning part and the end surface of the flange 12 of the second positioning part are respectively matched with the stepped surface 7 of the stepped hole into which each of them is fitted, so as to limit the installation depth of the first positioning part 2 and the second positioning part 4 in the fixed part 3 and axially position them. This is more conducive to determining the positioning length of the first positioning part 2 and the second positioning part 4 in the positioning part (such as the movable part 1 in the present application), avoiding the reduction of the positioning accuracy due to the too short positioning length, and thus ensuring the positioning accuracy of the positioning accessory.
[0035] The embodiment provides an assembling method of a dry vacuum pump equipment positioning structure, which is suitable for the fixed part 3, the movable part 1, the first positioning part 2 and the second positioning part 4 described above, and comprises the following contents: S1. The mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part are respectively assembled into the mounting hole 6 matched therewith; S2. The two positioning holes 5 of the movable part 1 are respectively aligned with the positioning part 10 of the first positioning part and the positioning part 13 of the second positioning part, and then the movable part 1 is pressed in, so that the assembling of the movable part 1 and the fixed part 3 is completed.
[0036] In the assembling of the second positioning part 4 (diamond pin or special diamond pin) in S1, it is necessary to ensure that the plane P1 is parallel to the plane P2 (the meanings of the plane P1 and the plane P2 are the same as above).
[0037] In S1, the mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part are transitionally matched with the mounting hole 6 assembled therewith, and the mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part are pressed into the mounting hole 6 matched therewith.
[0038] In S1, the two mounting holes 6 are both stepped holes, and the mounting part 8 of the first positioning part and the mounting part 11 of the second positioning part are pressed into the mounting hole 6 matched therewith to the extent that the flange end surface of each of them is in contact with the stepped surface 7 of the stepped hole assembled therewith.
[0039] The dry vacuum pump equipment positioning structure and the assembling method described in the embodiment are suitable for positioning of all equipment accessories which need multi-stage combination and have high requirements on the position of the center hole.
[0040] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are all based on the orientations or positional relationships shown in the drawings, and are only used for the convenience of describing the present application, and do not imply or require that the devices or elements referred to must have a particular orientation or construction, therefore should not be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description objects, and should not be understood as a limitation on importance or order, and the features defined by such terms can be explicitly or implicitly included one or more of the features. Unless otherwise stated, "multiple" in the description of the present application means two or more.
[0041] For the terms "mounting", "connecting", "connection", unless otherwise explicitly defined, should be understood in a broad sense, including but not limited to fixed connection, detachable connection or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication of two elements. Those skilled in the art can understand its meaning according to the specific technical solutions. In the present application, the fixed connection involved, unless otherwise stated, includes detachable fixed connection (such as bolt, screw connection), and also includes non-detachable fixed connection (such as riveting, welding), and also includes the integral structure realized by integral molding process (except for obvious integral molding).
[0042] The terms used to represent the position relationship or shape in any technical solution disclosed in the present application, unless otherwise stated, cover the approximate, similar or close state or shape.
[0043] Any component provided in the present application can be assembled from a plurality of individual components, or can be a single component manufactured by integral molding process.
[0044] It should be noted that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not have technical substantive significance, and any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.
[0045] In the embodiments of the present application, the same reference signs represent the same component or the same part.
[0046] Adaptive changes according to actual needs are within the scope of protection of the present application.
[0047] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.
Claims
1. A dry vacuum pump apparatus positioning structure, characterized by: The fixed part, the movable part, the first positioning part and the second positioning part are included. The fixed part is provided with two mounting holes. The movable part is provided with two positioning holes, which are coaxially matched with the mounting holes. The first positioning part and the second positioning part are respectively provided with a mounting portion and a positioning portion at the axial two ends thereof; the mounting portion is used for connecting the mounting hole, and the positioning portion is used for connecting the positioning hole; two positioning portions jointly define the mounting position of the movable part relative to the fixed part; the first positioning part and the second positioning part are respectively provided with a ventilation hole penetrating the mounting portion and the positioning portion thereof; and the two ventilation holes are used for discharging the gas pressed in during mounting.
2. The dry vacuum pump apparatus positioning structure according to claim 1, characterized by: The first positioning part is a cylindrical pin, the positioning hole connected with the cylindrical pin is a circular hole, the cylindrical pin is matched with the circular hole, and the cylindrical pin is used for radial positioning. The second positioning part is a rhombic pin, the positioning hole connected with the rhombic pin is a circular hole, the rhombic pin is matched with the circular hole, and the rhombic pin is used for limiting the rotation freedom of the movable part.
3. The dry vacuum pump apparatus positioning structure according to claim 2, characterized by: A tangent plane passing through the outermost side of the outer surface of the rhombic pin is parallel to a plane passing through the central axis of the rhombic pin and the central axis of the cylindrical pin.
4. The dry vacuum pump apparatus positioning structure according to claim 1, characterized by: The mounting portion of the first positioning part and the mounting portion of the second positioning part are transitionally matched with the mounting holes connected therewith.
5. The dry vacuum pump apparatus positioning structure according to claim 1, characterized by: The mounting portion and the positioning portion of the first positioning part and the mounting portion and the positioning portion of the second positioning part are respectively provided with a guide angle.
6. The dry vacuum pump apparatus positioning structure according to claim 1, characterized by: The mounting portion and the positioning portion of the first positioning part and the mounting portion and the positioning portion of the second positioning part are respectively provided with a flange; the two mounting holes are stepped holes; and the end surface of the flange of the first positioning part and the end surface of the flange of the second positioning part are respectively matched with the stepped surface of the stepped hole into which the flange is fitted.
7. A method of assembling a dry vacuum pump apparatus positioning structure, characterized by: The fixed part, the movable part, the first positioning part and the second positioning part are included. S1. The mounting portion of the first positioning part and the mounting portion of the second positioning part are respectively fitted into the mounting holes connected therewith. S2. The two positioning holes of the movable part are respectively aligned with the positioning portion of the first positioning part and the positioning portion of the second positioning part, and the movable part is pressed in, so that the assembly of the movable part and the fixed part is completed.
8. The assembling method of the dry vacuum pump apparatus positioning structure according to claim 7, characterized in that: In S1, the first positioning part is a cylindrical pin, the second positioning part is a rhombic pin, and after the second positioning part is fitted into the mounting hole, a tangent plane passing through the outermost side of the outer surface of the rhombic pin is parallel to a plane passing through the central axis of the rhombic pin and the central axis of the cylindrical pin.
9. The assembling method of the dry vacuum pump apparatus positioning structure according to claim 7, characterized in that: In S1, the mounting portion of the first positioning part and the mounting portion of the second positioning part are transitionally matched with the mounting holes connected therewith, and are pressed in and fitted.
10. The assembling method of the dry vacuum pump apparatus positioning structure according to claim 7, characterized in that: The mounting portion and the positioning portion of the first positioning part and the mounting portion and the positioning portion of the second positioning part are respectively provided with flanges, and the two mounting holes are stepped holes, and the end faces of the flanges of the first positioning part and the second positioning part respectively match the stepped faces of the stepped holes into which the flanges are fitted.