Medical screw vacuum pump with oil-free seal assembly

Abstract

The utility model provides a medical screw vacuum pump with oil -free sealing assembly, including pump body, elastic compensation module, self -lubricating sealing module, airflow guide module and temperature regulation module, elastic compensation module, self -lubricating sealing module, airflow guide module and temperature regulation module all install on the pump body. The utility model discloses the material and lubrication design of self -lubricating sealing module, ensure the effective sealing under the oil -free state, satisfy the high demand of medical field to the leakproofness.

Description

Technical Field

[0001] This utility model relates to the technical field of oil-free sealing components for vacuum pumps, and in particular to a medical screw vacuum pump with an oil-free sealing component. Background Technology

[0002] In the medical field, screw vacuum pumps, as key vacuum acquisition devices, are widely used in operating room negative pressure suction, medical device sterilization, and biological sample processing. These applications place extremely stringent requirements on the performance of vacuum pumps, especially in terms of oil-free cleanliness and operational stability.

[0003] Traditional screw vacuum pumps often use oil sealing, which can ensure a certain degree of sealing effect, but oil mist can easily enter the vacuum system with the airflow, contaminating the medical environment or samples, increasing the risk of cross-infection, and making it difficult to meet the core cleanliness requirements of the medical field. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a medical screw vacuum pump with an oil-free sealing assembly.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A medical screw vacuum pump with an oil-free sealing assembly includes a pump body, an elastic compensation module, a self-lubricating sealing module, an airflow guiding module, and a temperature regulating module; the elastic compensation module, the self-lubricating sealing module, the airflow guiding module, and the temperature regulating module are all mounted on the pump body.

[0007] Preferably, the elastic compensation module includes a spring seat, a compensation spring, and a guide post; the compensation spring is sleeved on the guide post, and its two ends are respectively connected to the spring seat and the self-lubricating sealing module; the guide post is used to limit the extension and retraction direction of the compensation spring, to elastically compensate for the displacement of the sealing component caused by temperature changes and mechanical vibration, and to maintain the contact pressure of the sealing surface.

[0008] Preferably, the self-lubricating sealing module includes a sealing ring body and solid grease embedded inside the sealing ring body; the sealing ring body is made of a composite material of polytetrafluoroethylene and carbon fiber.

[0009] Preferably, the airflow guiding module includes a guide ring and a plurality of guide vanes disposed inside the guide ring; the guide vanes are inclined and their inclination direction is adapted to the flow direction of the airflow in the vacuum pump.

[0010] Preferably, the temperature regulation module includes a cooling channel and a heat-conducting plate; the cooling channel is disposed inside the self-lubricating sealing module; the heat-conducting plate is in contact with the outer surface of the self-lubricating sealing module and is connected to the cooling channel.

[0011] Preferably, the cooling channel of the temperature regulation module is embedded inside the sealing ring body.

[0012] Preferably, the solid grease is a high-temperature resistant fluorine-based grease or a silicone-based grease.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. Excellent and stable sealing performance. The elastic compensation module provides elastic compensation for displacement, maintaining the sealing surface contact pressure. Combined with the material and lubrication design of the self-lubricating sealing module, it ensures effective sealing in an oil-free state, meeting the high sealing requirements of the medical field.

[0015] 2. High reliability: The temperature regulation module dissipates heat in a timely manner, preventing sealing components from failing due to high temperatures. The airflow guidance module optimizes airflow and reduces impact. All modules work together to ensure the efficient and stable operation of the vacuum pump and extend the service life of the components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side view and a front view of the present invention;

[0018] Figure 3 These are the top and side views of this utility model;

[0019] In the diagram: 1 Pump body, 2 Elastic compensation module, 21 Spring seat, 22 Guide column, 3 Self-lubricating sealing module, 31 Sealing ring body, 32 Solid grease, 4 Airflow guiding module, 5 Temperature regulation module. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Reference Figure 1-3 A medical screw vacuum pump with an oil-free sealing assembly includes a pump body 1, an elastic compensation module 2, a self-lubricating sealing module 3, an airflow guiding module 4, and a temperature regulating module 5. The elastic compensation module 2, the self-lubricating sealing module 3, the airflow guiding module 4, and the temperature regulating module 5 are all cleverly installed on the pump body 1. The modules work together to ensure the stable operation of the vacuum pump.

[0024] The elastic compensation module 2 plays a crucial adjusting role in the entire sealing assembly. It consists of a spring seat 21, a compensation spring, and a guide post 22. The compensation spring is precisely fitted onto the guide post 22, with its two ends securely connected to the spring seat 21 and the self-lubricating sealing module 3, respectively. The guide post 22 not only strictly limits the extension and contraction direction of the compensation spring to prevent it from shifting, but also provides timely and effective elastic compensation for the displacement of the sealing components caused by temperature changes and mechanical vibrations. During vacuum pump operation, drastic temperature fluctuations cause the sealing components to expand and contract, and mechanical vibrations also cause displacement. The compensation spring, through its own extension and contraction, maintains the contact pressure of the sealing surface, ensuring that the sealing effect is not compromised.

[0025] The self-lubricating sealing module 3 is the core component for achieving oil-free sealing. It includes a sealing ring body 31 and a solid grease 32 embedded inside the sealing ring body 31. The sealing ring body 31 is made of a composite material of polytetrafluoroethylene (PTFE) and carbon fiber. This material combines the corrosion resistance and low coefficient of friction of PTFE with the high strength and high wear resistance of carbon fiber, greatly improving the service life and sealing performance of the sealing ring. The solid grease 32 is a high-temperature resistant fluorinated grease or a silicone-based grease. These greases can maintain good lubrication performance even at high temperatures, ensuring smooth sliding between the sealing ring body 31 and other components, reducing frictional loss, even when the vacuum pump operates at high temperatures.

[0026] The airflow guiding module 4 optimizes the airflow inside the vacuum pump. It consists of a guide ring and multiple guide vanes located inside the guide ring. The guide vanes are inclined, and their inclination direction matches the airflow direction inside the vacuum pump. This design reduces airflow resistance during flow, prevents airflow turbulence from impacting the sealing components, and improves the pump's pumping efficiency, allowing the airflow to pass through the sealing area more smoothly.

[0027] The temperature regulation module 5 is crucial for maintaining the normal operating temperature of the self-lubricating sealing module 3. It includes a cooling channel and a heat-conducting plate. The cooling channel is embedded inside the sealing ring body 31, directly cooling the sealing ring body 31. The heat-conducting plate is tightly fitted to the outer surface of the self-lubricating sealing module 3 and connected to the cooling channel, rapidly transferring heat from the surface of the sealing ring body 31 to the cooling channel, where it is carried away by the circulation of the cooling medium. During vacuum pump operation, the sealing components generate a large amount of heat due to friction. The temperature regulation module 5 can dissipate this heat in a timely manner, preventing the sealing ring body 31 from aging and deforming due to high temperatures, and also preventing the solid grease 32 from failing due to excessive temperature, ensuring that the sealing assembly operates stably at a suitable temperature.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A medical screw vacuum pump with an oil-free sealing assembly, characterized in that, It includes a pump body (1), an elastic compensation module (2), a self-lubricating sealing module (3), an airflow guiding module (4), and a temperature regulating module (5); the elastic compensation module (2), the self-lubricating sealing module (3), the airflow guiding module (4), and the temperature regulating module (5) are all installed on the pump body (1).

2. The oil-free sealing assembly according to claim 1, characterized in that: The elastic compensation module (2) includes a spring seat (21), a compensation spring, and a guide post (22); the compensation spring is sleeved on the guide post (22), and its two ends are connected to the spring seat (21) and the self-lubricating sealing module (3) respectively; the guide post (22) is used to limit the extension and retraction direction of the compensation spring, to elastically compensate for the displacement of the sealing component caused by temperature changes and mechanical vibration, and to maintain the contact pressure of the sealing surface.

3. The oil-free sealing assembly according to claim 2, characterized in that: The self-lubricating sealing module (3) includes a sealing ring body (31) and solid grease (32) embedded inside the sealing ring body (31).

4. The oil-free sealing assembly according to claim 1, characterized in that: The airflow guiding module (4) includes a guide ring and multiple guide vanes disposed inside the guide ring; the guide vanes are inclined and their inclination direction is adapted to the flow direction of the airflow in the vacuum pump.

5. The oil-free sealing assembly according to claim 1, characterized in that: The temperature regulation module (5) includes a cooling channel and a heat-conducting plate; the cooling channel is located inside the self-lubricating sealing module (3); the heat-conducting plate is attached to the outer surface of the self-lubricating sealing module (3) and is connected to the cooling channel.

6. The oil-free sealing assembly according to claim 3, characterized in that: The cooling channel of the temperature regulation module (5) is embedded inside the sealing ring body (31).

7. The oil-free sealing assembly according to claim 3, characterized in that: The solid grease (32) is a high-temperature resistant fluorine-based grease or a silicone-based grease.

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