High-rotating-speed transmission pump

Abstract

The utility model discloses a high-rotating-speed transmission pump, which belongs to the field of medium transmission and comprises a power component and a magnetic transmission component. The magnetic transmission assembly comprises a permanent magnet outer rotor, an isolation sleeve and a permanent magnet inner rotor type impeller, the permanent magnet outer rotor is connected to the power assembly, the position of the permanent magnet outer rotor corresponds to that of the permanent magnet inner rotor type impeller, the permanent magnet inner rotor type impeller is covered with the isolation sleeve, and the permanent magnet inner rotor type impeller is connected with the permanent magnet outer rotor. The permanent magnet inner rotor type impeller comprises a permanent magnet inner rotor part and an impeller part connected to the outer wall of the permanent magnet inner rotor part. The high-rotating-speed transmission pump can achieve high-speed medium transmission, non-contact power transmission, medium conveying and sealing functions, the structure is simple after the permanent magnet inner rotor and the impeller structure are combined, the permanent magnet transmission function and the centrifugal driving medium transmission function are combined into one, transmission parts are cooled and lubricated through media, and the transmission efficiency is improved. The functions of leakage-free magnetic transmission, medium conveying and sealing are achieved.

Description

Technical Field

[0001] This utility model relates to the field of media transmission technology, and in particular to a high-speed transmission pump. Background Technology

[0002] In fluid transport equipment, various pump types all suffer from transmission shaft sealing issues. Transmission shafts come in two forms: magnetic seals and mechanical seals. Mechanical seals are dynamic seals, using various types of sealing rings to seal the rotating shaft radially and axially, allowing the medium to flow axially. However, over time, mechanical seals are prone to leakage, causing pollution to the working environment, posing safety risks, and requiring frequent maintenance. Magnetic seals consist of a permanent magnet inner rotor, a permanent magnet outer rotor, and an isolation sleeve. The isolation sleeve seals the permanent magnet inner rotor and the medium within the working chamber. A motor drives the permanent magnet outer rotor, which in turn drives the permanent magnet inner rotor using magnetic coupling characteristics. This achieves contactless torque transmission and static sealing, completely eliminating medium leakage and overcoming the shortcomings of mechanical seals.

[0003] To achieve a leak-free seal, magnetic sealing is required, and magnetic drive pumps solve the leakage problem in fluid transportation. For leak-free transportation of harmful and corrosive media, AC motor-driven magnetic drive pumps are commonly used. The speed of AC motor-driven magnetic drive pumps is typically below 3000 r / min. For magnetic drive pumps with speeds above 3000 r / min, AC motors are unsuitable. If DC motors are used, the increased speed will significantly increase heat generation in the components, leading to increased wear on the transmission parts and potential leakage and other safety hazards. Utility Model Content

[0004] The main objective of this invention is to provide a high-speed transmission pump that solves the problems of heat dissipation and increased wear in existing magnetic transmission pumps after the speed is increased.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a high-speed transmission pump, including a power component and a magnetic transmission component;

[0007] The magnetic transmission assembly includes a permanent magnet outer rotor, an isolation sleeve, and a permanent magnet inner rotor impeller. The permanent magnet outer rotor is connected to the power assembly. The permanent magnet outer rotor and the permanent magnet inner rotor impeller are positioned correspondingly. The isolation sleeve covers the permanent magnet inner rotor impeller. The permanent magnet inner rotor impeller includes a permanent magnet inner rotor section and an impeller section connected to the outer wall of the permanent magnet inner rotor section.

[0008] Furthermore, the impeller section includes a multi-stage impeller structure.

[0009] Preferably, the permanent magnet inner rotor and the impeller are integrally formed.

[0010] Furthermore, the isolation sleeve is provided with a transmission limiting post along its axial direction facing the permanent magnet inner rotor impeller, and the permanent magnet inner rotor is sleeved on the transmission limiting post.

[0011] Furthermore, an alloy sliding bearing assembly is fitted onto the end of the transmission limiting post near the permanent magnet inner rotor, and the alloy sliding bearing assembly is in contact with the permanent magnet inner rotor.

[0012] Furthermore, a pressure cap is provided on the transmission limiting post, which is used to limit the movement of the alloy sliding bearing assembly.

[0013] Furthermore, the isolation sleeve is connected to the pump body, and the isolation sleeve and the pump body constitute a medium transmission cavity. A medium outlet is opened on one side of the pump body, and a support frame is installed inside the pump body. The support frame has a limiting cavity, and the limiting cavity is sleeved on the end of the transmission limiting post near the pump body.

[0014] Furthermore, an alloy thrust bearing assembly is fitted onto the transmission limiting post, and both ends of the alloy thrust bearing assembly are in contact with the support frame and the permanent magnet inner rotor, respectively.

[0015] Furthermore, a sealing platform is provided inside the pump body, and a mouth ring is provided on the sealing platform. The mouth ring is used to position and seal the permanent magnet internal rotor impeller.

[0016] Furthermore, the power assembly includes a high-voltage DC motor, which is connected to the permanent magnet outer rotor. The high-voltage DC motor is mounted on a support frame, and the support frame is sealed to the isolation sleeve.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model of a high-speed transmission pump can achieve high-efficiency (impeller speed up to 6000 r / min) media transmission, realizing contactless power transmission, media conveying and sealing functions. Its structure is simple after integrating the permanent magnet internal rotor and impeller structure, combining the functions of permanent magnet transmission and centrifugal drive media transmission into one. Simultaneously, it adopts a radial and axial force balancing alloy bearing structure to overcome the radial and axial forces generated by the permanent magnet internal rotor impeller during high-speed rotation. It utilizes the medium to cool and lubricate the transmission components, achieving leak-free magnetic transmission, media conveying and sealing functions. It solves the requirements of bearings for high temperature resistance, high pressure resistance, and wear resistance in dry friction, making it suitable for leak-free conveying of harmful and corrosive media, eliminating environmental pollution and personal injury caused by media leakage. It can be widely used in petroleum, chemical, pharmaceutical, and environmental protection industries. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the high-speed transmission pump of this utility model;

[0020] Figure 2 This is a schematic diagram of the magnetic transmission assembly of the high-speed transmission pump of this utility model.

[0021] Figure 3 This is a schematic diagram of the working process of the high-speed transmission pump of this utility model.

[0022] In the diagram: 1. Pump body, 2. Support frame, 3. Inlet ring, 4. Alloy thrust bearing assembly, 5. Permanent magnet inner rotor impeller, 6. Isolation sleeve, 7. Gland, 8. Permanent magnet outer rotor, 9. Bracket, 10. Alloy sliding bearing assembly, 11. High voltage DC motor. Detailed Implementation

[0023] 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.

[0024] See Figure 1 This embodiment discloses a high-speed transmission pump, which is a centrifugal magnetic pump driven by a DC motor. It is a high-speed impeller power-generating device that can realize contactless power transmission, media conveying and sealing functions.

[0025] The transmission pump includes a power component and a magnetic transmission component;

[0026] See Figure 1 and Figure 2Specifically, the magnetic transmission assembly includes a permanent magnet outer rotor 8, an isolation sleeve 6, and a permanent magnet inner rotor impeller 5. The permanent magnet outer rotor 8 is connected to the power assembly. The permanent magnet outer rotor 8 and the permanent magnet inner rotor impeller 5 are positioned correspondingly. The isolation sleeve 6 covers the permanent magnet inner rotor impeller 5. The permanent magnet inner rotor impeller 5 includes a permanent magnet inner rotor section and an impeller section connected to the outer wall of the permanent magnet inner rotor section.

[0027] The isolation sleeve 6 is a non-rotating component. It completely isolates the permanent magnet inner rotor impeller 5 and the medium from the permanent magnet outer rotor 8, achieving shaft-seal-free power transmission and transforming dynamic sealing into static sealing to meet leakage-free transmission requirements. The permanent magnet outer rotor 8 drives the permanent magnet inner rotor impeller 5 to rotate through magnetic coupling, completing non-contact torque transmission while simultaneously conveying the medium. In this embodiment, both the permanent magnet inner rotor impeller 5 and the permanent magnet outer rotor 8 are permanent magnet structures with a stainless steel outer sheath, preventing contact between the permanent magnet inner rotor impeller 5 and the medium. The use of the low-heat isolation sleeve 6 prevents temperature rise in the medium, ensuring stable magnetic operation of the system, improving transmission efficiency, and achieving zero leakage in the conveyed medium.

[0028] In this application, the permanent magnet inner rotor is directly connected to the impeller, eliminating the need for a conventional drive shaft. When the permanent magnet outer rotor 8 drives the permanent magnet inner rotor to rotate through magnetic coupling, the impeller of the impeller also rotates synchronously, making the power transmission more direct. Furthermore, the direct connection of the impeller to the outer wall of the permanent magnet inner rotor makes its rotation more stable, reducing the problem of radial and axial offset that is prone to occur when it is set on a traditional drive shaft.

[0029] Furthermore, the impeller section includes a multi-stage impeller structure. The number and structure of the impellers in the impeller section can be adjusted according to actual needs. For example, it can be set as a single-stage impeller or designed as a multi-stage impeller. The number of impellers can also be adjusted as needed, and this application does not limit this.

[0030] Preferably, the permanent magnet inner rotor and the impeller are integrally formed. Integral forming ensures good structural consistency and more stable operation of the permanent magnet inner rotor impeller 5, reducing the likelihood of damage. Of course, the permanent magnet inner rotor and the impeller can also be manufactured separately and then connected by screws or other means, which offers the advantage of convenient maintenance and replacement, but its performance is inferior to that of an integrally formed structure.

[0031] Further, see Figure 1 and Figure 2 The isolation sleeve 6 is provided with a transmission limiting post along its axial direction facing the permanent magnet inner rotor impeller 5, and the permanent magnet inner rotor is sleeved on the transmission limiting post.

[0032] Furthermore, an alloy sliding bearing assembly 10 is fitted on the end of the transmission limit post near the permanent magnet inner rotor, and the alloy sliding bearing assembly 10 is in contact with the permanent magnet inner rotor.

[0033] Furthermore, a pressure cap 7 is provided on the transmission limit post, which is used to limit the alloy sliding bearing assembly 10.

[0034] Furthermore, the isolation sleeve 6 is connected to the pump body 1, and the isolation sleeve 6 and the pump body 1 constitute a medium transmission cavity. A medium outlet is opened on one side of the pump body 1, and a support frame 2 is installed inside the pump body 1. The support frame 2 has a limiting cavity, which is sleeved on the end of the transmission limiting column near the pump body.

[0035] Furthermore, an alloy thrust bearing assembly 4 is fitted onto the transmission limit post, and both ends of the alloy thrust bearing assembly 4 are in contact with the support frame 2 and the permanent magnet inner rotor, respectively.

[0036] Furthermore, a sealing platform is provided inside the pump body 1, and an inlet ring 3 is provided on the sealing platform. The inlet ring 3 is used to position and seal the inlet of the permanent magnet internal rotor impeller 5.

[0037] This application employs a three-point support structure for the permanent magnet internal rotor impeller 5, consisting of a port ring 3, an alloy thrust bearing assembly 4, and an alloy sliding bearing assembly 10. This support structure includes one point of bidirectional alloy sliding bearing assembly support, one point of axial alloy thrust bearing assembly support, and one point of radial port ring support. This ensures the balance of axial forces and the absence of radial positional offset under various operating conditions, significantly eliminating the influence of axial forces and working loads on the permanent magnet internal rotor impeller 5, extending its service life, and guaranteeing the stability and safety of the system. Specifically, the alloy sliding bearing assembly 10 is a combination of radial alloy sliding bearings and axial alloy thrust bearings, used to withstand axial and radial forces generated by irregular media movement, and possesses dry friction characteristics of high temperature resistance, high pressure resistance, and wear resistance. The alloy thrust bearing assembly 4 is a combination of front and rear alloy thrust bearings, used to withstand axial forces generated by irregular media movement, and possesses dry friction characteristics of high temperature resistance, high pressure resistance, and wear resistance. The port ring 3 provides positioning and sealing for the inlet of the permanent magnet internal rotor impeller 5, and its sealing function effectively prevents back leakage of the media, ensuring the efficient operation of the pump. During installation, the radial alloy sliding bearing and the axial alloy thrust bearing are respectively installed on the transmission limit post of the isolation sleeve 6 with a reasonable fit clearance to form the alloy sliding bearing assembly 10. The front and rear thrust bearings are respectively sleeved on the transmission limit post of the isolation sleeve 6 with a reasonable fit clearance. The front and rear thrust bearings are respectively in contact with the support frame 2 and the permanent magnet internal rotor impeller 5 to form the alloy thrust bearing assembly 4.

[0038] Furthermore, the power assembly includes a high-voltage DC motor 11, which is connected to a permanent magnet external rotor 8. The high-voltage DC motor 11 is mounted on a support frame 2, and the support frame 2 is sealed to the isolation sleeve 6.

[0039] Specifically, in this embodiment, the pump body 1, bracket 9, and high-voltage DC motor 11 are connected as a single unit using screws; the permanent magnet external rotor 8 and high-voltage DC motor 11 are connected as a single unit using keys to form the active component; the isolation sleeve 6 and pump body 1 are connected as a single unit using screws and sealing rings to form a static sealing structure; the pressure cover 7 and isolation sleeve 6 are connected as a single unit using screws to limit the alloy sliding bearing assembly 10; the support frame 2 and the mouth ring 3 are fixed to the pump body 1 using a reasonable fit clearance; and the alloy thrust bearing assembly 4 and alloy sliding bearing assembly 10 are respectively fixed between the isolation sleeve 6 and the support frame 2 using a reasonable fit clearance to support the permanent magnet internal rotor impeller 5 to form the passive component. The centrifugal permanent magnet internal rotor impeller 5 performs work on the medium, causing the medium to be axially drawn in and radially discharged to achieve the purpose of medium transportation. The pump body 1 is a single-stage centrifugal pump with a single-layer shell horizontal structure.

[0040] See Figure 3 During operation, the high-voltage DC motor 11 drives the permanent magnet outer rotor 8 to rotate at high speed. Due to the magnetic field between the permanent magnet inner rotor impeller 5 and the permanent magnet outer rotor 8, the permanent magnet outer rotor 8 drives the permanent magnet inner rotor impeller 5 inside the isolation sleeve 6 to rotate synchronously through magnetic coupling characteristics. This transmits the torque of the high-voltage DC motor 11 to the permanent magnet inner rotor impeller 5 without contact. The rotation of the permanent magnet inner rotor impeller 5 performs work on the medium. The medium is axially drawn in from the left inlet (indicated by the arrow) and radially flows out from the upper outlet (indicated by the arrow), thus achieving medium transportation. In case of overload, the permanent magnet inner rotor impeller 5 and the permanent magnet outer rotor 8 slip relative to each other, which protects the high-voltage DC motor 11.

[0041] The drive pump in this embodiment achieves leak-free magnetic drive, media conveying, and sealing functions. It boasts advantages such as leak-free operation, compact structure, reliable operation, maintenance-free operation, and long service life. It is suitable for leak-free conveying of hazardous and corrosive media and can be widely used in industries such as petroleum, chemical, pharmaceutical, and environmental protection.

[0042] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-speed transmission pump, characterized in that, Including power components and magnetic transmission components; The magnetic transmission assembly includes a permanent magnet outer rotor, an isolation sleeve, and a permanent magnet inner rotor impeller. The permanent magnet outer rotor is connected to the power assembly. The permanent magnet outer rotor and the permanent magnet inner rotor impeller are positioned correspondingly. The isolation sleeve covers the permanent magnet inner rotor impeller. The permanent magnet inner rotor impeller includes a permanent magnet inner rotor section and an impeller section connected to the outer wall of the permanent magnet inner rotor section.

2. The high-speed transmission pump according to claim 1, characterized in that, The impeller section includes a multi-stage impeller structure.

3. The high-speed transmission pump according to claim 1 or 2, characterized in that, The permanent magnet inner rotor and the impeller are integrally formed.

4. The high-speed transmission pump according to claim 1, characterized in that, The isolation sleeve is provided with a transmission limiting post along its axial direction facing the permanent magnet inner rotor impeller, and the permanent magnet inner rotor is sleeved on the transmission limiting post.

5. The high-speed transmission pump according to claim 4, characterized in that, An alloy sliding bearing assembly is fitted onto the end of the transmission limiting post near the permanent magnet inner rotor, and the alloy sliding bearing assembly is in contact with the permanent magnet inner rotor.

6. The high-speed transmission pump according to claim 5, characterized in that, A pressure cap is provided on the transmission limiting post, and the pressure cap is used to limit the movement of the alloy sliding bearing assembly.

7. The high-speed transmission pump according to claim 4, characterized in that, The isolation sleeve is connected to the pump body, and the isolation sleeve and the pump body form a medium transmission cavity. A medium outlet is opened on one side of the pump body. A support frame is installed inside the pump body. The support frame has a limiting cavity, and the limiting cavity is sleeved on the end of the transmission limiting post near the pump body.

8. The high-speed transmission pump according to claim 7, characterized in that, An alloy thrust bearing assembly is fitted onto the transmission limiting column, and both ends of the alloy thrust bearing assembly are in contact with the support frame and the permanent magnet inner rotor, respectively.

9. The high-speed transmission pump according to claim 7, characterized in that, The pump body is provided with a sealing platform, and the sealing platform is provided with a mouth ring, which is used to position and seal the permanent magnet internal rotor impeller.

10. The high-speed transmission pump according to claim 1, characterized in that, The power assembly includes a high-voltage DC motor, which is connected to the permanent magnet outer rotor. The high-voltage DC motor is mounted on a support frame, which is sealed to an isolation sleeve.

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