Vacuum pump motor and vacuum pump

Abstract

The embodiment of the utility model discloses a vacuum pump motor, which comprises a shell, a rotating shaft, a stator, a rotor, a spacer bush and a sealing element, wherein the shell is cylindrical, the two end faces of the shell are sealed through the sealing pieces respectively, one end of the rotating shaft is located inside the shell, and the other end of the rotating shaft is located outside the shell; the stator is fixedly arranged in the shell, and the rotor is fixedly arranged at one end, located in the shell, of the rotating shaft and corresponds to the stator in position to form cooperation; the spacer bush is fixedly arranged in the shell and located between the stator and the rotor so that the stator and the rotor can be isolated, and the sealing pieces are arranged at the two ends of the spacer bush and matched with the sealing pieces respectively so that external foreign matter can be prevented from entering the shell. According to the vacuum pump motor, the stator and the rotor are effectively isolated through the assembly combination relation of the spacer bush and the sealing element in the motor structure, foreign matter is prevented from entering the motor to affect the operation of the rotor, and the vacuum pump motor is simple in structure, easy to assemble and good in sealing effect.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a vacuum pump motor and a vacuum pump. Background Technology

[0002] As the core power component of vacuum equipment, the structural design and sealing performance of the vacuum pump motor directly affect the reliability and service life of the equipment. Currently, the common stator isolation technology for vacuum pump motors on the market mainly adopts potting compound or welded isolation structures. For example, in existing technologies (such as patents CN205986475U and CN219372156U), the isolation between the stator and rotor areas is mostly achieved by filling with potting compound or welding a fixed housing and partition. Although this type of solution can achieve a certain degree of sealing, it has certain limitations: for example, the potting compound requires precise control of the filling amount and curing conditions, and the welding process has extremely high requirements for processing precision, resulting in long production cycles and increased costs; at the same time, potted or welded components are difficult to disassemble and replace, and once local damage occurs (such as partition deformation or aging of the compound), the entire component often needs to be scrapped, resulting in high maintenance costs; in addition, the potting compound is susceptible to cracking due to temperature changes, the welded structure is prone to sealing failure due to vibration, and foreign objects can easily enter the rotor area, causing motor failure.

[0003] On the other hand, in existing technologies, the connection between the spacer and the housing often relies on complex assembly processes, such as fixing with multi-level fasteners or customized components, further increasing the difficulty of manufacturing and maintenance. While some solutions attempt to adopt a split design to improve interchangeability, the redundancy of the sealing structure leads to higher assembly precision requirements and insufficient practicality. To address these issues, there is an urgent need for a vacuum pump motor solution that is structurally simplified, reliably sealed, and easy to maintain. Utility Model Content

[0004] The main objective of this application is to provide a solution that addresses the problem of existing vacuum pump motor protection structures being complex and ineffective in protecting internal components.

[0005] To achieve the above objectives, this application proposes a vacuum pump motor, comprising:

[0006] The housing is cylindrical, and its two end faces are respectively closed by closure components;

[0007] A rotating shaft, one end of which is located inside the housing, and the other end of which is located outside the housing;

[0008] The stator is fixedly disposed inside the housing;

[0009] The rotor is fixedly disposed at one end of the rotating shaft located inside the housing, and corresponds to the position of the stator to form a cooperative relationship;

[0010] A spacer sleeve is fixedly disposed inside the housing and located between the stator and the rotor to isolate the stator and the rotor;

[0011] A sealing element is disposed at both ends of the spacer and cooperates with a sealing element to prevent external foreign objects from entering the interior of the housing.

[0012] For example, in the vacuum pump motor provided in at least one embodiment of this application, the sealing member includes a flange, which is detachably fixed to the housing, and an annular groove is provided on the side near the inside of the housing.

[0013] A first sealing ring is disposed on the outer side of one end of the spacer, and one end of the spacer is installed in the annular groove and abuts against the inner wall of the annular groove through the first sealing ring.

[0014] For example, in the vacuum pump motor provided in at least one embodiment of this application, the sealing member further includes an inner pressure plate with a through-hole, the inner pressure plate being detachably installed on the side of the flange near the interior of the housing, and the through-hole being provided with an inner annular groove.

[0015] A second sealing ring is also provided on the outer side of one end of the spacer. One end of the spacer passes through the inner pressure plate and is installed on the annular groove, and abuts against the inner annular groove through the second sealing ring.

[0016] For example, in the vacuum pump motor provided in at least one embodiment of this application, at least one sidewall of the annular groove is an inclined guide surface, so that the cross-sectional width of the groove gradually decreases along the insertion direction of the spacer.

[0017] For example, in the vacuum pump motor provided in at least one embodiment of this application, the bottom of the annular groove and / or the inner annular groove has a wavy, concave-convex surface.

[0018] For example, in the vacuum pump motor provided in at least one embodiment of this application, a limiting bushing is further included. The limiting bushing is disposed inside the housing and is passed through by the spacer to limit the radial displacement of the spacer.

[0019] For example, in the vacuum pump motor provided in at least one embodiment of this application, the spacer is provided with a micro-hole, which connects the rotor and the cavity on which the stator is mounted, and is used to assist the seal to fit tightly with the sealed component through negative pressure difference.

[0020] For example, in the vacuum pump motor provided in at least one embodiment of this application, heat sinks are provided on the outer surface of the housing.

[0021] On the other hand, one embodiment of this application also provides a vacuum pump, the vacuum pump including a vacuum pump motor as described in any of the preceding claims.

[0022] Compared to existing vacuum pump motors, the vacuum pump motor of this application has at least the following advantages: By using a spacer to penetrate the housing and isolate the stator and rotor, and combining the seals and closures at both ends of the spacer, a multi-axial sealing structure is formed. Compared to traditional potting compound or welding isolation, this mechanical seal method avoids the problems of aging and cracking of the compound or welding vibration failure, effectively improving sealing reliability and durability. The tight fit between the seals and closures effectively prevents external dust, liquids, and other foreign matter from entering the rotor area, reducing the risk of motor failure due to contamination. Furthermore, the housing, closures, spacer, and seals are detachably connected, avoiding the problem of traditional potting or welding-based integrated fixing that makes disassembly and maintenance difficult. The vacuum pump motor of this application adopts a simple structure and simplified assembly process, facilitating motor disassembly and maintenance while effectively reducing the possibility of foreign matter entering the motor, reducing maintenance costs and scrap rate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a front view of an embodiment of the vacuum pump motor of this application;

[0025] Figure 2 This is a front sectional view of an embodiment of the vacuum pump motor of this application;

[0026] Figure 3 for Figure 2 Enlarged detail image of point A in the middle;

[0027] Figure 4 This is an isometric sectional view of an embodiment of the vacuum pump motor of this application;

[0028] Figure 5 This is a diagram showing the structural relationship between the flange and the inner pressure plate of an embodiment of the vacuum pump motor of this application;

[0029] Figure 6 A schematic diagram of an embodiment of the vacuum pump provided in this application;

[0030] Reference numerals: 10, housing; 11, front flange; 12, rear flange; 13, annular groove; 14, circular protrusion; 15, inner pressure plate; 16, inner annular groove; 17, heat sink; 20, rotating shaft; 30, stator; 40, rotor; 50, spacer; 51, first sealing ring; 52, second sealing ring; 60, limiting bushing; 100, vacuum pump.

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] In one embodiment of the vacuum pump motor provided in this application, the internal structure of the motor includes a housing, a rotating shaft, a stator, a rotor, a spacer, and a seal. The housing is cylindrical, and its two end faces are respectively sealed by the seal. One end of the rotating shaft is located inside the housing, and the other end is located outside the housing. The stator is fixedly disposed inside the housing, and the rotor is fixedly disposed at the end of the rotating shaft located inside the housing, corresponding to the stator position to form a cooperative arrangement. The spacer is fixedly disposed inside the housing and located between the stator and the rotor to isolate the stator and the rotor. The seal is disposed at both ends of the spacer and cooperates with the seal to prevent external foreign objects from entering the housing.

[0037] like Figure 1 As shown, the vacuum pump motor is housed within a cylindrical housing 10 with openings at both ends. The openings at both ends are secured to the housing 10 by bolts, screws, or clips, forming a closed system. Inside the housing 10, refer to [reference needed]. Figure 2 , Figure 4 The stator 30 and rotor 40 are coaxially arranged, with the stator 30 located on the outer ring of the rotor 40. The rotor 40 is mounted on one end of the rotating shaft 20. When energized, the rotor 40 rotates under the action of electromagnetic induction. The other end of the rotating shaft 20 extends to the outside of the housing 10 as an output end. The spacer 50 is also cylindrical, extending axially through the entire housing 10 and separating the stator 30 and rotor 40, forming two cavities inside the housing 10. The rotor 40 is located inside the spacer 50, and the stator 30 is located outside the spacer 50 (inside the housing 10). A first sealing ring 51 is provided at the end of the spacer 50, which cooperates with the mounting positions of the front flange 11 and the rear flange 12, such as mounting ports and mounting grooves, to form a fixed and sealed structure, preventing foreign objects from entering the housing 10.

[0038] Special note: In order to avoid interfering with the magnetic field distribution of the motor, the spacer 50 should preferably be made of non-magnetic material to balance electromagnetic performance, mechanical strength and environmental resistance, such as aluminum alloy, titanium alloy, ceramic, engineering plastics, etc.

[0039] More specifically, see Figure 3 and Figure 5 An annular groove 13 is provided on one side of the front flange 11 and the rear flange 12 (near the housing 10 during installation) as an installation position. Correspondingly, the first sealing ring 51 is arranged as an O-ring on the outer side of the end of the spacer 50. After the end of the spacer 50 is engaged with the annular groove 13, the O-ring forms an abutment against the annular groove 13 to complete the installation and sealing. The O-ring can be made of rubber material, which has a certain elasticity and is temperature-resistant and corrosion-resistant, which is beneficial to the stability of motor installation and operation.

[0040] Furthermore, the circular protrusion 14 formed by the annular groove 13 on the flange can be machined to a certain height so as to extend into the interior of the spacer 50, forming a fixing and supporting function from the interior of the spacer 50, which is conducive to strengthening the fixing effect.

[0041] Specifically, the annular groove 13 can have at least one side as an inclined guide surface, so that the cross-sectional width of the groove gradually decreases along the insertion direction of the spacer 50. During installation, as the O-ring is inserted deeper and the compression effect is enhanced, it abuts more firmly against the annular groove 13, resulting in stronger stability and sealing.

[0042] In one embodiment, the closure further includes an inner pressure plate 15 with a through opening. The inner pressure plate 15 is detachably installed on the side of the flange near the inside of the housing 10, and an inner annular groove 16 is provided on the through opening. A second sealing ring 52 is also provided on the outer side of one end of the spacer 50. One end of the spacer 50 passes through the inner pressure plate 15 and is installed on the annular groove 13, and abuts against the inner annular groove 16 through the second sealing ring 52.

[0043] See Figure 2 , Figure 3 , Figure 4 and Figure 5 The inner pressure plate 15 is stacked on one side of the flange and fixed by bolts or other means. The spacer 50 can pass through the through-hole, i.e., it is located on the outside of the spacer 50. In the aforementioned embodiment, there is a description of the circular protrusion 14 formed by the annular groove 13 on the flange providing support from the inside of the spacer 50. This embodiment can be combined with that embodiment. Through the positional relationship between the inner pressure plate 15 sleeved on the spacer 50 and the circular protrusion 14, a clamping effect is formed on the spacer 50, thereby improving the installation and fixing effect.

[0044] In addition, an inner ring groove 16 is provided on the through opening of the inner pressure plate 15, and a second sealing ring 52 is provided at the corresponding position on the spacer 50 (the material and structure of the second sealing ring 52 are implemented with reference to the first sealing ring 51). After installation, the second sealing ring 52 and the inner ring groove 16 form an abutment, constituting an additional sealing structure, which further enhances the sealing effect inside the motor.

[0045] Preferably, in the above embodiments, the bottom of the annular groove 13 and the inner annular groove 16 can be configured as a wavy concave-convex surface, so that the O-ring is pressed into the groove during installation. The concave-convex surface forces the O-ring to produce multi-directional elastic deformation, uniformly fills the gap, enhances the fit with the installation groove, and reduces the risk of leakage.

[0046] In one embodiment, the vacuum pump motor of this application further includes a limiting bushing 60, which is disposed inside the housing 10 and through which the spacer 50 passes, for limiting the radial displacement of the spacer 50.

[0047] See Figure 2 Two limiting bushings 60 are provided, distributed on both sides of the stator 30, while the spacer 50 passes through the shaft center. As can be understood from the description and illustrations of the foregoing embodiments, the spacer 50, fixed at both ends to the flange, provides lateral restraint, while the limiting bushings 60 radially restrain the spacer 50, preventing oscillation and shaking that could cause displacement and motor failure, thus contributing to the optimization of the internal structural strength of the motor.

[0048] Possibly, in the aforementioned embodiment, the spacer 50 has micro-holes (not shown in the figure). These micro-holes connect the cavities where the rotor 40 and stator 30 are mounted, and are used to assist the sealing element in a tight fit with the sealed component through negative pressure difference. The micro-holes, acting as a channel between the two cavities separated by the spacer 50, can balance the air pressure in the rotor 40 and stator 30 cavities. Under negative pressure, the first sealing ring 51 and the second sealing ring 52 can fit more tightly against the contact surface, maintaining sealing stability during operation.

[0049] In one implementation, such as Figure 1 As shown, a heat sink 17 is also provided on the outer surface of the housing 10. The heat sink 17 can increase the heat conduction area, which is beneficial to improving the heat dissipation efficiency.

[0050] The vacuum pump motors provided in the various embodiments or implementations of this application use a spacer 50 that penetrates the housing 10 and isolates the stator 30 from the rotor 40. The first sealing ring 51 and the second sealing ring 52 at both ends of the spacer 50 cooperate with the annular groove 13 of the flange to form a multi-axial sealing structure. This effectively improves the reliability and durability of the seal while also blocking external dust, liquids, and other foreign matter, reducing the risk of motor failure due to contamination. Furthermore, the structure is simple, parts are easy to process, and it can be repeatedly disassembled, which helps improve the efficiency of the motor.

[0051] On the other hand, one embodiment of this application also provides a vacuum pump 100, which includes a vacuum pump motor as in any of the preceding embodiments. See, for example, [link to previous embodiment]. Figure 6 The shaft of the vacuum pump motor is located at one end outside the housing and can be integrally extended into the corresponding vacuum pump 100 to provide power output.

[0052] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A vacuum pump motor, characterized in that, include: The housing is cylindrical, and its two end faces are respectively closed by closure components; A rotating shaft, one end of which is located inside the housing, and the other end of which is located outside the housing; The stator is fixedly disposed inside the housing; The rotor is fixedly disposed at one end of the rotating shaft located inside the housing, and corresponds to the position of the stator to form a cooperative relationship; A spacer sleeve is fixedly disposed inside the housing and located between the stator and the rotor to isolate the stator and the rotor; A sealing element is disposed at both ends of the spacer and cooperates with a sealing element to prevent external foreign objects from entering the interior of the housing.

2. A vacuum pump motor according to claim 1, characterized in that The closure includes a flange, which is detachably fixed to the housing and has an annular groove on the side near the inside of the housing; a first sealing ring is disposed on the outer side of one end of the spacer, and one end of the spacer is installed in the annular groove and abuts against the inner wall of the annular groove through the first sealing ring.

3. A vacuum pump motor according to claim 2, characterised in that, The closure also includes an inner pressure plate with a through opening, the inner pressure plate being detachably installed on the side of the flange near the interior of the housing, and an inner annular groove being provided on the through opening; a second sealing ring is also provided on the outer side of one end of the spacer, one end of the spacer passing through the inner pressure plate and installed on the annular groove, and abutting against the inner annular groove through the second sealing ring.

4. The vacuum pump motor of claim 2, wherein, At least one sidewall of the annular groove is an inclined guide surface, so that the cross-sectional width of the groove gradually decreases along the insertion direction of the spacer.

5. A vacuum pump motor according to claim 3, characterized in that The bottom of the annular groove and / or the inner annular groove has a wavy, concave-convex surface.

6. The vacuum pump motor of claim 1, wherein, It also includes a limiting bushing, which is disposed inside the housing and through which the spacer passes, for limiting the radial displacement of the spacer.

7. The vacuum pump motor of claim 1, wherein, The spacer sleeve has micro-holes that connect the rotor and the cavity where the stator is mounted, and are used to assist the seal in a tight fit with the sealed component through negative pressure difference.

8. The vacuum pump motor of claim 1, wherein, Heat sinks are provided on the outer surface of the housing.

9. A vacuum pump, characterized by The vacuum pump includes a vacuum pump motor as described in any one of claims 1 to 8.

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