Pipeline direct connection type air suspension turbine vacuum pump

Abstract

The invention relates to the field of mechanical equipment, in particular to a pipeline direct connection type air suspension turbine vacuum pump which comprises a shell, the shell is through in the front-back direction, a motor is installed in the shell and comprises a motor sleeve, a motor stator is installed in the motor sleeve, a motor rotor is rotatably installed in the motor stator, and an impeller is installed on the motor rotor. A radial air bearing used for supporting a motor rotor to rotate is installed in the shell, the motor sleeve and the shell are mutually spaced, a spaced cavity of the motor sleeve and the shell forms a main channel for airflow to pass through, the motor sleeve is through front and back, an inner cavity of the motor sleeve forms an auxiliary channel for airflow to pass through, and a sealing cover plate is installed on the front side of the motor sleeve. The impeller is located in front of the sealing cover plate, the sealing cover plate seals the opening in the front side of the motor sleeve, and a plurality of flow dividing holes are formed in the sealing cover plate and penetrate through the sealing cover plate. A double-channel structure is arranged in the vacuum pump, air inlet drainage can be directly used for cooling a main machine, and meanwhile the air outlet pressure of a single-channel structure is relieved.

Description

Technical Field

[0001] The invention relates to the field of mechanical equipment, and in particular to a pipeline direct-connected air suspension turbine vacuum pump. Background Art

[0002] In the field of industrial production and scientific research, vacuum pumps, as an important fluid machinery, are widely used in the creation and maintenance of various vacuum environments. Their working principle is to obtain vacuum by evacuating the container by mechanical, physical, chemical or physical and chemical methods. There is a gearbox between the motor and the pump body of a traditional vacuum pump, which is used to adjust the motor speed and accelerate the operation of the vacuum pump.

[0003] During the operation of the existing vacuum pump, the gearbox not only consumes a lot of energy and causes large energy losses, but also because the heat dissipation effect of the motor is poor, it is necessary to add a cooling fan at the rear end to extract air and dissipate heat from the motor. This not only increases the complexity and cost of the equipment, but also brings about a series of subsequent problems such as air flow turbulence and large resistance, which affects the operating efficiency of the equipment and increases energy consumption and maintenance costs, and needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a pipeline direct-connected air suspension turbine vacuum pump capable of independently dissipating heat for a motor in view of the above problems.

[0005] In order to achieve the above-mentioned purpose, the present invention discloses a pipeline direct-connected air suspension turbine vacuum pump, including a shell, which is connected from front to back. Its structural characteristics are that a motor is installed in the shell, the motor includes a motor sleeve, a motor stator is installed in the motor sleeve, a motor rotor is rotatably installed in the motor stator, an impeller is installed on the motor rotor, and a radial air bearing for supporting the rotation of the motor rotor is installed in the shell. The motor sleeve and the shell are spaced apart from each other, and the spaced cavity between the motor sleeve and the shell forms a main channel for air flow to pass through. The motor sleeve is connected from front to back, and the internal cavity of the motor sleeve forms a secondary channel for air flow to pass through.

[0006] The vacuum pump consists of two parts: a rotating component and a fixed component. The overall connection adopts a direct connection structure without additional energy loss. Its structure is a hollow double-channel structure, which splits the intake air. The gas in the upper main channel flows to the outlet through the shell, and the gas in the lower secondary channel flows to the outlet through the motor sleeve. The lower secondary channel not only reduces the pressure of the upper main channel outlet channel, but also cools the motor rotor and stator. It optimizes the structure of the traditional vacuum pump that needs to add a fan at the tail end for exhaust and heat dissipation. The overall energy-saving cooling effect is significantly improved, and the gas delivery volume is also increased. The use of radial air bearings reduces friction loss, and the rotor can be operated at high speed without going through a gearbox.

[0007] A sealing cover is installed on the front side of the motor housing, the impeller is located in front of the sealing cover, the sealing cover closes the front opening of the motor housing, and a plurality of diversion holes are opened on the sealing cover, which penetrate the sealing cover. The diversion holes are located at the corners of the sealing cover, and the airflow can pass smoothly through the plurality of diversion holes.

[0008] The sealing cover plate is provided with an avoidance hole, and the motor rotor protrudes outward through the avoidance hole. A sealing sleeve is fixedly installed on the motor rotor, and the sealing sleeve is sleeved on the motor rotor. The installation position of the sealing sleeve corresponds to the avoidance hole. A sealing tooth is provided in the avoidance hole, and a plurality of sealing teeth are provided. The plurality of sealing teeth cooperate with the sealing sleeve to form a labyrinth seal. The tooth-shaped sealing structure provided in the avoidance hole does not contact the sealing sleeve, so that the air in the motor chamber as a lubricant and a coolant is completely and effectively isolated from the high-pressure air at the impeller end, so as to prevent the high-pressure gas from being thrown into the motor chamber when the air suspension turbine vacuum pump is running, and effectively improve the efficiency of the air suspension turbine vacuum pump.

[0009] The housing is provided with a first support frame and a second support plate frame, and the front and rear ends of the motor sleeve are connected to the first support frame and the second support plate frame respectively. The first support frame and the second support plate frame provide stable support for the motor sleeve, ensuring the stable operation of the motor and the motor rotor, thereby enhancing the structural strength of the equipment and improving the reliability and safety of the equipment.

[0010] A bearing base is installed on the first support frame, and the radial air bearing includes a first radial air bearing installed on the bearing base. The first radial air bearing is sleeved on the motor rotor and located in front of the motor rotor. Before the pipeline direct air suspension turbine vacuum pump is started, there is physical contact between the motor rotor and the radial air bearing. When started, the motor rotor and the radial air bearing move relative to each other to form a fluid dynamic field. This fluid dynamic force forms a buoyancy force in the radial air bearing, and the buoyancy force puts the rotor assembly in a suspended state to achieve a state of free rotation. During the operation, there is no contact, no friction, and no need for lubrication.

[0011] The radial air bearing also includes a second radial air bearing, which is mounted on a second support plate frame, and the second radial air bearing is sleeved on the motor rotor and located at the rear of the motor rotor. The first radial air bearing and the second radial air bearing are respectively located at the front and rear of the motor rotor, providing all-round support for the motor rotor. This further reduces mechanical friction and wear, and improves the stability and service life of the equipment.

[0012] A thrust bearing cover is installed in front of the bearing base, and thrust air bearings are installed on the side surfaces facing each other. The two thrust air bearings are spaced apart from each other. A thrust plate for cooperating with the thrust air bearings is fixedly installed on the motor rotor. The thrust plate is located between the two thrust air bearings and spaced apart from the two thrust air bearings. The thrust air bearings and thrust plates can prevent the motor rotor from moving in the axial direction, thereby improving the stability and precision of the equipment.

[0013] The rear of the motor housing is equipped with a guide sleeve, which is in the shape of a cone that gathers backwards, and can guide the airflow discharged from the main channel and the secondary channel to run according to the required trajectory and pass stably, avoiding the turbulence and vibration caused by the two high-pressure airflows in the tail cavity when they are discharged. It is conducive to guiding the airflow to pass smoothly, reducing the resistance and energy loss of the airflow, improving the efficiency of the vacuum pump, and reducing energy consumption.

[0014] The front side of the shell is equipped with an air inlet sleeve, the front side of the air inlet sleeve is equipped with a connecting sleeve, and the rear side of the shell is equipped with an air outlet sleeve. Flanges are provided on the air outlet sleeve and the connecting sleeve. The air inlet sleeve and the air outlet sleeve provide inlet and outlet for the air flow, and the flange design facilitates the connection and installation of the equipment. The versatility and flexibility of the equipment are improved, and it is convenient to connect and use with other equipment.

[0015] The motor stator is fixedly installed in the motor sleeve, and the motor rotor passes through the motor stator. The motor rotor and the motor stator are both located in the motor sleeve, and the airflow in the secondary channel can cool the motor rotor and the motor stator, thereby optimizing the structure of the traditional vacuum pump that needs to add a fan at the tail end for exhaust and heat dissipation, and the overall energy-saving cooling effect is significantly improved.

[0016] In summary, the beneficial effects of the present invention are: the pipeline direct-connected air suspension turbine vacuum pump is directly connected by a high-speed permanent magnet synchronous motor and a high-efficiency three-dimensional flow impeller, and operates without contact, friction, and lubrication. The pipeline direct-connected air suspension turbine vacuum pump adopts an integrated structure as a whole, with a compact layout and convenient installation, and strong component interchangeability. Compared with the traditional gear vacuum pump, the pipeline direct-connected air suspension turbine vacuum pump has the advantages of stable intake fluctuations, high impeller efficiency, high parts interchangeability, low noise, etc., and has a significant energy-saving effect. It is a vacuum pump with overall performance superior to that of the traditional gear structure. The inlet and outlet sleeves are equipped with flange docking interfaces, which can be directly connected to the external pipeline to reduce airflow losses. The interior of the vacuum pump is changed to a dual-channel structure, which can directly cool the main engine with intake air diversion and reduce the outlet pressure of the single-channel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A local enlarged structural diagram of point A in the middle; Figure 3 It is a structural schematic diagram of a sealing cover plate; Figure 4 Schematic diagram of the impeller installation structure; Figure 5 It is a schematic diagram of the installation structure of the first support frame and the second support plate frame; Figure 6 It is a schematic diagram of the cross-sectional structure of a pipeline direct-connected air suspension turbine vacuum pump; Figure 7 Schematic diagram of the motor installation structure; Figure 8 This is a schematic diagram of the appearance and structure of a pipeline direct-connected air-suspended turbine vacuum pump.

[0018] In the figure: connecting sleeve 1, impeller 2, air inlet sleeve 3, sealing cover plate 4, sealing teeth 5, first support frame 6, motor sleeve 7, motor stator 8, motor rotor 9, second support plate frame 10, air outlet sleeve 11, guide sleeve 12, first radial air bearing 13, bearing base 14, thrust plate 15, thrust air bearing 16, thrust bearing cover plate 17, sealing sleeve 18, housing 19, motor 20, diverter hole 21, second radial air bearing 22, avoidance hole 23. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] A pipeline direct-connected air suspension turbine vacuum pump includes a housing 19, which is through-connected from front to back. A motor 20 is installed inside the housing 19. The motor 20 uses a high-speed permanent magnet synchronous motor. The motor 20 is wrapped by a motor sleeve 7. The motor rotor 9 is rotatably installed in the motor sleeve 7, and the impeller 2 is installed on the shaft. The impeller 2 uses a high-efficiency three-dimensional flow impeller. In order to ensure the stable rotation of the motor rotor 9, a radial air bearing is specially designed in the housing 19 for support. A certain interval is maintained between the motor sleeve 7 and the housing 19. This interval forms a main channel for air flow, and the front-to-back through-connection design of the motor sleeve 7 itself constitutes another secondary channel. This vacuum pump adopts a direct connection structure, which is divided into two parts: a rotating component and a fixed component, avoiding additional energy loss. Its dual-channel design diverts the intake air, and the gas in the upper main channel flows to the outlet through the housing 19, while the gas in the lower secondary channel flows to the outlet through the motor sleeve 7. This not only reduces the pressure at the air outlet of the upper main channel, but also uses the gas in the secondary channel to cool the inside of the rotor and stator of the motor 20, thereby optimizing the structure of the traditional vacuum pump that requires an additional fan at the tail end for heat dissipation, and significantly improving the overall energy-saving cooling effect.

[0024] See attached Figure 1 , Attachment Figure 3 The front side of the motor housing 7 is provided with a sealing cover plate 4, which closes the front opening of the motor housing 7 and has a plurality of diversion holes 21 formed thereon. These holes are located at the corners of the cover plate to ensure smooth passage of airflow. The sealing cover plate 4 is also provided with an avoidance hole 23, through which the motor rotor 9 passes, and is provided with a sealing sleeve 18 and a plurality of sealing teeth 5 to ensure that the air in the chamber of the motor 20 is completely isolated from the high-pressure air at the end of the impeller 2, to prevent the high-pressure gas from being thrown into the chamber of the motor 20, thereby improving the efficiency of the vacuum pump.

[0025] See attached Figure 5 , Attachment Figure 6In order to provide stable support, a first support frame 6 and a second support plate frame 10 are installed in the housing 19, which are respectively connected to the front and rear ends of the motor housing 7. A bearing base 14 is also installed on the first support frame 6, on which a first radial air bearing 13 is installed, and a second radial air bearing 22 is installed on the second support plate frame 10. These two radial air bearings provide all-round support for the motor rotor 9, reduce mechanical friction and wear, and improve the stability and service life of the equipment.

[0026] In addition, refer to the attached Figure 2 A thrust bearing cover plate 17 is installed in front of the bearing base 14, and a thrust air bearing 16 is installed on the side surface facing the cover plate and the base. A thrust plate 15 is fixed on the motor rotor 9, which is located between the two thrust air bearings 16 to prevent the motor rotor 9 from moving in the axial direction.

[0027] See attached Figure 6 The rear of the motor sleeve 7 is equipped with a guide sleeve 12, which is designed in a conical cylinder and is used to guide the airflow discharged from the main channel and the secondary channel to pass stably to avoid vibration caused by turbulent airflow. The front and rear sides of the shell 19 are respectively equipped with an inlet sleeve 3 and an outlet sleeve 11, and are equipped with flanges to facilitate the connection and installation of the equipment. The motor stator 8 is also fixed in the motor sleeve 7, and the motor rotor 9 runs through it. The airflow in the secondary channel can cool the motor rotor 9 and the motor stator 8, further optimizing the heat dissipation structure of the traditional vacuum pump.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A pipeline direct-connected air suspension turbine vacuum pump, comprising a housing (19), the housing (19) being through-connected from front to back, characterized in that: A motor (20) is installed in the housing (19), the motor (20) comprising a motor sleeve (7), a motor stator (8) installed in the motor sleeve (7), a motor rotor (9) rotatably installed in the motor stator (8), an impeller (2) installed on the motor rotor (9), a radial air bearing for supporting the rotation of the motor rotor (9) installed in the housing (19), the motor sleeve (7) and the housing (19) being spaced apart from each other, a spaced cavity between the motor sleeve (7) and the housing (19) forming a main channel for air flow to pass through, the motor sleeve (7) being connected front to back, and an internal cavity of the motor sleeve (7) forming a secondary channel for air flow to pass through.

2. The pipeline direct-connected air suspension turbine vacuum pump according to claim 1, characterized in that: A sealing cover plate (4) is installed on the front side of the motor housing (7), the impeller (2) is located in front of the sealing cover plate (4), the sealing cover plate (4) closes the front opening of the motor housing (7), a plurality of flow diversion holes (21) are formed on the sealing cover plate (4), and the flow diversion holes (21) penetrate the sealing cover plate (4).

3. The pipeline direct-connected air suspension turbine vacuum pump according to claim 2, characterized in that: The sealing cover plate (4) is provided with an avoidance hole (23), the motor rotor (9) protrudes outward through the avoidance hole (23), a sealing sleeve (18) is fixedly mounted on the motor rotor (9), the sealing sleeve (18) is sleeved on the motor rotor (9), the installation position of the sealing sleeve (18) corresponds to the avoidance hole (23), a sealing tooth (5) is provided in the avoidance hole (23), a plurality of sealing teeth (5) are provided, and the plurality of sealing teeth (5) cooperate with the sealing sleeve (18) to form a labyrinth seal.

4. The pipeline direct-connected air suspension turbine vacuum pump according to claim 1, characterized in that: A first support frame (6) and a second support plate frame (10) are installed in the housing (19), and the front and rear ends of the motor sleeve (7) are respectively connected to the first support frame (6) and the second support plate frame (10).

5. The pipeline direct-connected air suspension turbine vacuum pump according to claim 4, characterized in that: A bearing base (14) is mounted on the first support frame (6); the radial air bearing comprises a first radial air bearing (13) mounted on the bearing base (14); the first radial air bearing (13) is sleeved on the motor rotor (9) and is located in front of the motor rotor (9).

6. The pipeline direct-connected air suspension turbine vacuum pump according to claim 5, characterized in that: The radial air bearing further comprises a second radial air bearing (22), the second radial air bearing (22) being mounted on the second support plate frame (10), the second radial air bearing (22) being sleeved on the motor rotor (9) and being located at the rear of the motor rotor (9).

7. The pipeline direct-connected air suspension turbine vacuum pump according to claim 4, characterized in that: A thrust bearing cover plate (17) is installed in front of the bearing base (14); thrust air bearings (16) are installed on the side surfaces facing each other between the thrust bearing cover plate (17) and the bearing base (14); the two thrust air bearings (16) are spaced apart from each other; a thrust plate (15) for cooperating with the thrust air bearings (16) is fixedly installed on the motor rotor (9); the thrust plate (15) is located between the two thrust air bearings (16) and is spaced apart from the two thrust air bearings (16).

8. The pipeline direct-connected air suspension turbine vacuum pump according to claim 1, characterized in that: A guide sleeve (12) is installed at the rear of the motor sleeve (7), and the guide sleeve (12) is in the shape of a cone that converges backwards. An air outlet sleeve (11) is installed at the rear side of the housing (19), and the guide sleeve (12) is located inside the air outlet sleeve (11), and the two are spaced apart from each other.

9. The pipeline direct-connected air suspension turbine vacuum pump according to claim 8, characterized in that: An air inlet sleeve (3) is installed on the front side of the housing (19), a connecting sleeve (1) is installed on the front side of the air inlet sleeve (3), and the impeller (2) is located in the air inlet sleeve (3).

10. The pipeline direct-connected air suspension turbine vacuum pump according to claim 9, characterized in that: The air outlet sleeve (11), the connecting sleeve (1) and the air outlet sleeve (11) are all provided with flanges.

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