Active sealing structure of supercharger rotor

Abstract

The invention provides a supercharger rotor active sealing structure which comprises a spring seat, a shaft sleeve, a rotating shaft, a moving ring, a static ring, a push ring and a spring connected between the push ring and the spring seat, a cavity is formed in the static ring, spray holes are formed in the surface of the static ring, one side of the cavity is communicated with the spray holes, and the other side of the cavity is externally connected with a high-pressure air source through an air inlet pipe. The high-pressure gas source sends high-pressure gas into the cavity through the gas inlet pipe and then sprays the high-pressure gas out of the spraying holes, and the high-pressure gas sprayed out of the spraying holes can form a rigid gas film between the movable ring and the static ring. According to the active sealing structure of the supercharger rotor, pressure distribution between the movable ring and the static ring can be accurately controlled, the operation stability of equipment is improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of rotor sealing, and in particular relates to an active sealing structure of a supercharger rotor. Background Art

[0002] The Chinese invention patent application number 202010396545.4, a sealing device and method with a spiral cooling structure, can achieve cooling of the sealing seat and the push ring in the dry gas seal through the setting of the spiral cooling channel, ensuring that the floating sealing ring is in a safe operating temperature condition, and ensuring the reliability and safety of the dry gas seal under high temperature conditions. However, when the dry gas seal is in operation, the sealing gas enters between the mating end faces of the dynamic ring and the static ring from the side, which makes it difficult for the sealing gas to act evenly between the dynamic ring and the static ring, so that the dynamic ring may lose dynamic balance when rotating. In addition, under different working conditions, the imbalance between the pressure of the gas introduced and the force generated by the hydrodynamic bearing itself will cause local force on the sealing surface, resulting in local contact wear. Therefore, how to achieve uniform action of the sealing gas between the dynamic ring and the static ring so that the dynamic ring can maintain dynamic balance is one of the key issues that need to be solved urgently. Summary of the invention

[0003] In view of this, the present invention aims to propose an active sealing structure for a supercharger rotor to solve the problem of how to make the sealing gas act evenly between the dynamic ring and the static ring and enable the dynamic ring to maintain dynamic balance.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A supercharger rotor active sealing structure comprises a spring seat, a shaft sleeve, a rotating shaft, a dynamic ring, a static ring, a push ring, and a spring connected between the push ring and the spring seat. A cavity is provided inside the static ring, and a spray hole is provided on the surface of the static ring. One side of the cavity is connected to the spray hole, and the other side is connected to a high-pressure gas source through an intake pipe. The high-pressure gas source sends high-pressure gas into the cavity through the intake pipe and then sprays it out through the spray hole. The high-pressure gas sprayed through the spray hole can form a rigid gas film between the dynamic ring and the static ring.

[0006] Furthermore, a plurality of independent cavities are provided in the static ring, each cavity corresponds to an air inlet pipe, and the positions of the two are one-to-one corresponding.

[0007] Furthermore, by changing the air pressure of the air intake pipe, the air pressure at different positions of the static ring can be adjusted, thereby adjusting the force at different positions of the dynamic ring.

[0008] Furthermore, a side of the spring seat close to the shaft sleeve is provided with an annular groove for mounting a stationary ring, and the annular groove is clearance-matched with the stationary ring.

[0009] Furthermore, a plurality of pressure sensors are provided between the stationary ring and the push ring. The pressure sensors are evenly arranged around the axis of the stationary ring, and each pressure sensor is connected to an external control center.

[0010] Furthermore, the number of the pressure sensors is at least 3.

[0011] Furthermore, the number of the air intake pipes is at least 3.

[0012] Furthermore, a spiral cooling channel is provided in the spring seat, and the spiral cooling channel is a flow channel for a cooling fluid.

[0013] Furthermore, a plurality of guide grooves are evenly distributed on the surface of the stationary ring in the circumferential direction, two adjacent guide grooves are connected by a connecting groove, and the outlet position of the spray hole is located in the guide groove.

[0014] Compared with the prior art, the supercharger rotor active sealing structure of the present invention has the following advantages:

[0015] (1) The active sealing structure of the supercharger rotor described in the present invention provides a spray hole in the stationary ring so that the sealing gas (such as high-pressure gas) can be directly sprayed out from the spray hole to fully fill the space between the stationary ring and the dynamic ring, thereby improving the sealing performance; secondly, by providing a pressure sensor on the stationary ring, it is possible to monitor the stress conditions at various positions of the stationary ring in real time, and to promptly discover and handle possible abnormal conditions; finally, by providing multiple intake pipes and cavities corresponding to the intake pipes in the spring seat, the gas pressure sprayed from the spray holes at different positions of the dynamic ring can be adjusted as needed, thereby achieving the purpose of accurately controlling the pressure distribution between the dynamic ring and the stationary ring, and further improving the operating stability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the active sealing structure of the supercharger rotor according to an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of a stationary ring according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1. Spring seat; 2. Bushing; 3. Rotating shaft; 4. Moving ring; 5. Stationary ring; 6. Push ring; 7. Spring; 8. Cavity; 9. Spray hole; 10. Inlet pipe; 11. Annular groove; 12. Pressure sensor; 13. Spiral cooling channel; 14. Guide groove; 15. Connecting groove. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, 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 the present invention can be understood by specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0025] A supercharger rotor active sealing structure, such as Figure 1 and Figure 2 As shown, it includes a spring seat 1, a sleeve 2, a rotating shaft 3, a dynamic ring 4, a static ring 5, a push ring 6 and a spring 7 connected between the push ring 6 and the spring seat 1. The above structure is an existing mechanical shaft end dry gas seal structure, so it is not described in detail in this scheme. The key improvements of this scheme are: a cavity 8 is provided in the static ring 5, and a spray hole 9 connected to the cavity 8 is provided on the surface of the static ring 5. The side of the cavity 8 is connected to a high-pressure gas source through a plurality of intake pipes 10. The high-pressure gas source sends the high-pressure gas into the cavity 8 through the intake pipe 10 and then sprays it out through the spray hole 9. The high-pressure gas sprayed through the spray hole 9 can form a rigid gas film between the dynamic ring 4 and the static ring 5.

[0026] In the present embodiment, since the high-pressure air source is directly sprayed from the surface of the static ring 5 to the surface of the dynamic ring 4, the high-pressure air source can be well filled between the dynamic ring 4 and the static ring 5. In addition, there are multiple air intake pipes 10. By changing the air pressure of the air intake pipes 10, the air pressure at different positions of the static ring 5 can be adjusted, thereby adjusting the force at different positions of the dynamic ring 4. It should be understood that in one or more embodiments, a number of independent cavities 8 are provided in the static ring 5, each cavity 8 corresponds to an air intake pipe 10, and the positional relationship between the two corresponds one to one.

[0027] Furthermore, an annular groove 11 for installing the static ring 5 is provided on one side of the spring seat 1 close to the sleeve 2, and the annular groove 11 and the static ring 5 are matched with a clearance, and a plurality of pressure sensors 12 are provided between the static ring 5 and the push ring 6, and the pressure sensors 12 are evenly arranged around the axis of the static ring 5. The number of pressure sensors 12 is at least 3, and the force conditions at various positions of the static ring 5 can be detected. The pressure sensor 12 signal is connected to an external control center; for example, when the rotating shaft 3 loses dynamic balance, the rotating shaft 3 will shake continuously when rotating, which will cause the values ​​detected by different pressure sensors 12 to fluctuate rapidly within a range. When the rotating shaft 3 as a whole deviates to one side, the static ring 5 on that side will be subjected to greater pressure, so that the value detected by the pressure sensor 12 on that side will be larger.

[0028] The number of the air intake pipes 10 is at least three, and the number of the cavities 8 is equal to the number of the air intake pipes 10 and their positions correspond.

[0029] A spiral cooling channel 13 is provided in the spring seat 1, and the spiral cooling channel 13 covers the entire body of the spring seat 1 in the radial direction and the axial direction. A cooling fluid is provided in the spiral cooling channel 13, and the interior of the spring seat 1 can be quickly cooled by the cooling fluid flowing in the spiral cooling channel 13.

[0030] The surface of the stationary ring 5 is embedded with a plurality of annular guide grooves 14, and the plurality of guide grooves 14 are arranged concentrically, and adjacent guide grooves 14 are connected by connecting grooves 15, and the outlet position of the spray hole 9 is located in the guide groove 14. The arrangement of the guide groove 14 and the connecting groove 15 enables the sealing gas to quickly fill the space between the dynamic ring 4 and the stationary ring 5, forming a relatively uniform air film between the dynamic ring 4 and the stationary ring 5, thereby avoiding direct friction between the dynamic ring 4 and the stationary ring 5.

[0031] Working principle of a supercharger rotor active sealing structure:

[0032] The high-pressure gas source passes through the intake pipe 10 and the cavity 8 in sequence, and then is sprayed directly from the surface of the static ring 5 to the surface of the dynamic ring 4 through the spray hole 9, so that the high-pressure gas source can be well filled between the dynamic ring 4 and the static ring 5, thereby improving the sealing performance; by arranging a pressure sensor on the static ring, it is possible to monitor the stress conditions at various positions of the static ring in real time, and promptly discover and deal with possible abnormal conditions; at the same time, by adjusting the number of intake pipes and the pressure of the gas source, the gas pressure sprayed from the spray holes at different positions of the dynamic ring can be adjusted, thereby achieving the purpose of accurately controlling the pressure distribution between the dynamic ring and the static ring.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A supercharger rotor active sealing structure, comprising a spring seat, a sleeve, a rotating shaft, a dynamic ring, a static ring, a push ring, and a spring connected between the push ring and the spring seat, characterized in that: A cavity is provided inside the static ring, and a spray hole is provided on the surface of the static ring. One side of the cavity is connected to the spray hole, and the other side is connected to a high-pressure gas source through an air intake pipe. The high-pressure gas source sends high-pressure gas into the cavity through the air intake pipe and then sprays it out through the spray hole. The high-pressure gas sprayed through the spray hole can form a rigid air film between the dynamic ring and the static ring.

2. The supercharger rotor active sealing structure according to claim 1, characterized in that: A number of independent cavities are arranged in the static ring, each cavity corresponds to an intake pipe, and the positions of the two are one-to-one corresponding.

3. The supercharger rotor active sealing structure according to claim 1, characterized in that: By changing the air pressure of the air intake pipe, the air pressure at different positions of the static ring can be adjusted, thereby adjusting the force at different positions of the dynamic ring.

4. The supercharger rotor active sealing structure according to claim 1, characterized in that: A ring groove for mounting a stationary ring is arranged on one side of the spring seat close to the shaft sleeve, and the ring groove is clearance-matched with the stationary ring.

5. The supercharger rotor active sealing structure according to claim 1, characterized in that: A plurality of pressure sensors are arranged between the static ring and the push ring. The pressure sensors are evenly arranged around the axis of the static ring, and each pressure sensor is connected to an external control center.

6. The supercharger rotor active sealing structure according to claim 5, characterized in that: The number of pressure sensors is at least 3.

7. The supercharger rotor active sealing structure according to claim 1, characterized in that: The number of intake pipes is at least 3.

8. The supercharger rotor active sealing structure according to claim 1, characterized in that: A spiral cooling channel is arranged in the spring seat, and the spiral cooling channel is a flow channel for the cooling fluid.

9. The supercharger rotor active sealing structure according to claim 1, characterized in that: A plurality of guide grooves are evenly distributed on the surface of the stationary ring in the circumferential direction, two adjacent guide grooves are connected by a connecting groove, and the outlet position of the spray hole is located in the guide groove.

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