Magnetic fluid bearing box secondary protection magnetic force pump

Abstract

The utility model provides a magnetic fluid bearing box secondary protection magnetic drive pump belongs to the technical field of magnetic drive pump, including the pump body, the one end fixed mounting of pump body has the pump cover, the back surface fixed connection of pump cover has the double -layer isolation bushing. The utility model discloses a pressure sealed cavity that double -layer isolation bushing, sealing bracket and magnetic fluid bearing box constitute, cooperate multistage monitoring system of first pressure transmitter and second pressure transmitter, realized secondary protection when magnetic drive pump leak: when the inner layer of double -layer isolation bushing leaks, and first pressure transmitter alarms, but equipment still can safe operation, realizes secondary protection through second pressure transmitter when complete failure, all contact medium's sealing bracket, outer magnetic rotor and magnetic fluid bearing box all adopt corrosion -resistant material, ensure long -term reliability, and the structure design is simple and efficient, and the water -cooling jacket of magnetic fluid bearing box equipment makes it have wide applicable temperature range, can adapt to various magnetic drive pump type.

Description

Technical Field

[0001] This utility model belongs to the technical field of magnetic pumps, specifically relating to a magnetic pump with secondary protection for a magnetohydrodynamic bearing housing. Background Technology

[0002] Magnetic pumps, as leak-free fluid transfer devices, are widely used in chemical, pharmaceutical and other fields. Their core function is to achieve power transmission and media sealing through an isolation sleeve. However, the isolation sleeve may be damaged due to corrosion, fatigue and other factors during long-term operation, leading to media leakage, which affects equipment safety and environmental compliance. To improve safety, existing technologies usually adopt secondary protection measures, such as double-layer isolation sleeves with pressure transmitters to monitor leakage, media leakage detection sensors such as tuning fork switches, and mechanical seals or shutdown seals installed on the bearing housing. These methods can trigger alarms or shutdown when leakage occurs, thereby reducing risks.

[0003] The aforementioned secondary protection technologies are all passive response mechanisms, requiring manual intervention to repair leaks. If not maintained in a timely manner, the secondary protection function will fail, and safety hazards will still exist. In addition, existing technologies cannot achieve proactive prevention or automatic repair of leaks, which limits the reliability and long-term operation capability of equipment. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic pump with secondary protection for a magnetohydrodynamic bearing housing, aiming to solve the problems mentioned in the background art.

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

[0006] A magnetic pump with secondary protection for a magnetohydrodynamic (MHD) bearing housing includes a pump body. A pump cover is fixedly installed at one end of the pump body. A double-layer isolation sleeve is fixedly connected to the back of the pump cover. A rotor system is movably installed inside the double-layer isolation sleeve. A MHD bearing housing is fixedly fitted on the outer side of the double-layer isolation sleeve. A sealing bracket is fixedly installed on the back of the pump body. The back of the sealing bracket is fixedly connected to the MHD bearing housing. A first pressure transmitter is fixedly installed on the outer side of the double-layer isolation sleeve. A second pressure transmitter is fixedly installed on the outer side of the sealing bracket.

[0007] In a preferred embodiment of this utility model, an annular gap is formed between the inner layer and the outer layer of the double-layer isolation sleeve, and a sealed pressure chamber is formed between the double-layer isolation sleeve, the sealing bracket, and the magnetohydrodynamic bearing housing.

[0008] In a preferred embodiment of this utility model, an inner magnetic rotor is fixedly installed in the inner cavity of the rotor system, an outer magnetic rotor is fixedly installed in the inner cavity of the magnetohydrodynamic bearing housing, and a double-layer isolation sleeve is radially disposed between the inner magnetic rotor and the outer magnetic rotor.

[0009] As a preferred embodiment of this utility model, a nitrogen discharge valve is fixedly installed on the outer side of the sealing bracket, a water inlet pipe is fixedly installed on one side of the magnetohydrodynamic bearing housing, and a water outlet pipe is fixedly installed on the other side of the magnetohydrodynamic bearing housing.

[0010] As a preferred embodiment of this utility model, a sealing gasket is fixedly installed at the connection between the pump cover and the pump body, and a second sealing ring is fixedly installed at the connection between the sealing bracket and the magnetohydrodynamic bearing housing.

[0011] As a preferred embodiment of this utility model, a first sealing ring is fixedly installed at the joint surface between the pump cover and the pump body.

[0012] As a preferred embodiment of this utility model, a filter screen is fixedly installed in the inner cavity of the water inlet pipe, and a flow regulating valve is movably installed in the body of the water outlet pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The pressure-sealed cavity formed by the double-layer isolation sleeve, sealing bracket, and magnetohydrodynamic bearing housing, combined with the multi-stage monitoring system of the first and second pressure transmitters, achieves secondary protection against leakage in the magnetic pump: when the inner layer of the double-layer isolation sleeve leaks, the first pressure transmitter alarms but the equipment can still operate safely; in case of complete failure, secondary protection is achieved through the second pressure transmitter; all sealing brackets, outer magnetic rotors, and magnetohydrodynamic bearing housings in contact with the medium are made of corrosion-resistant materials to ensure long-term reliability. This structural design is simple and efficient. The water-cooling jacket equipped in the magnetohydrodynamic bearing housing gives it a wide applicable temperature range, making it suitable for various types of magnetic pumps. While ensuring safety, it significantly improves the equipment's versatility and service life. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle.

[0017] In the diagram: 1. Pump body; 2. Rotor system; 3. Pump cover; 4. First sealing ring; 5. Sealing gasket; 6. Double-layer isolation sleeve; 7. Sealing bracket; 8. Outer magnetic rotor; 9. Second sealing ring; 10. Magnetohydrodynamic bearing housing; 11. Nitrogen filling and discharge valve; 12. Inlet pipe; 13. Outlet pipe; 14. Inner magnetic rotor; 15. First pressure transmitter; 16. Second pressure transmitter. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Example

[0022] Reference Figures 1-2 This embodiment of the present invention provides a magnetic pump with secondary protection for a magnetohydrodynamic bearing housing, including a pump body 1, a pump cover 3 fixedly installed at one end of the pump body 1, a double-layer isolation sleeve 6 fixedly connected to the back of the pump cover 3, a rotor system 2 movably installed in the inner cavity of the double-layer isolation sleeve 6, a magnetohydrodynamic bearing housing 10 fixedly sleeved on the outer side of the double-layer isolation sleeve 6, a sealing bracket 7 fixedly installed on the back of the pump body 1, the back of the sealing bracket 7 fixedly connected to the magnetohydrodynamic bearing housing 10, a first pressure transmitter 15 fixedly installed on the outer side of the double-layer isolation sleeve 6, and a second pressure transmitter 16 fixedly installed on the outer side of the sealing bracket 7.

[0023] The integrated design of pump body 1, pump cover 3, double-layer isolation sleeve 6 and magnetohydrodynamic bearing housing 10 constructs a complete main structure of the magnetic pump. The sealing bracket 7, as a key connecting component, realizes a stable connection between the pump body and the magnetohydrodynamic bearing housing, providing a basic support platform for subsequent secondary protection functions.

[0024] Specifically, an annular gap is formed between the inner layer of the double-layer isolation sleeve 6 and the outer layer of the isolation sleeve, and a sealed pressure chamber is formed between the double-layer isolation sleeve 6, the sealing bracket 7, and the magnetohydrodynamic bearing housing 10.

[0025] Among them, the special structure of the double-layer isolation sleeve 6 forms a double protection of annular gap and sealed pressure chamber. When the inner isolation sleeve fails, the outer isolation sleeve can still maintain the seal to ensure the equipment continues to operate. The pressure chamber design can buffer the leakage pressure of the medium and avoid sudden leakage accidents.

[0026] Furthermore, an inner magnetic rotor 14 is fixedly installed in the inner cavity of the rotor system 2, and an outer magnetic rotor 8 is fixedly installed in the inner cavity of the magnetohydrodynamic bearing housing 10. A double-layer isolation sleeve 6 is radially arranged between the inner magnetic rotor 14 and the outer magnetic rotor 8.

[0027] Among them, the inner magnetic rotor 14 and the outer magnetic rotor 8 achieve non-contact transmission through the double-layer isolation sleeve 6. The magnetic coupling structure completely eliminates the wear problem of the mechanical seal, and the radial arrangement optimizes the magnetic field transmission efficiency and improves the transmission stability.

[0028] Preferably, a nitrogen discharge valve 11 is fixedly installed on the outer side of the sealing bracket 7, an inlet pipe 12 is fixedly installed on one side of the magnetohydrodynamic bearing housing 10, and an outlet pipe 13 is fixedly installed on the other side of the magnetohydrodynamic bearing housing 10.

[0029] Among them, the nitrogen discharge valve 11 constitutes the core component of the intelligent monitoring system, which can adjust the pressure chamber status in real time. The symmetrical arrangement of the water inlet pipe 12 and the water outlet pipe 13 ensures the balanced flow of the cooling system. This design realizes real-time monitoring of the equipment's operating status and temperature control.

[0030] Furthermore, a sealing gasket 5 is fixedly installed at the connection between the pump cover 3 and the pump body 1, and a second sealing ring 9 is fixedly installed at the connection between the sealing bracket 7 and the magnetohydrodynamic bearing housing 10.

[0031] Among them, the sealing gasket 5 and the second sealing ring 9 constitute the second sealing defense line, forming a complementary sealing protection system with the double-layer isolation sleeve 6. Even if the isolation sleeve fails, the sealing structure can still maintain short-term operation, buying time for downtime maintenance.

[0032] Furthermore, a first sealing ring 4 is fixedly installed at the joint surface between the pump cover 3 and the pump body 1.

[0033] Among them, the first sealing ring 4 serves as the most basic sealing guarantee, preventing the medium from leaking from the pump body joint surface.

[0034] Furthermore, a filter screen is fixedly installed inside the inlet pipe 12, and a flow regulating valve is movably installed on the body of the outlet pipe 13.

[0035] The filter screen of the water inlet pipe 12 can prevent the cooling system from clogging and ensure long-term stable operation, while the flow regulating valve facilitates precise control of the cooling water flow and optimizes heat dissipation efficiency.

[0036] Before operation, nitrogen gas at a pressure of ≤1MPa is introduced into the sealed cavity consisting of the double-layer isolation sleeve 6, the sealing bracket 7, and the magnetic fluid bearing housing 10 through the nitrogen discharge valve 11. After the pressure remains constant, and after confirming that there is no leakage in the magnetic fluid bearing housing 10 and all seals, the equipment can be started. During operation, the pressure status of the sealed cavity is monitored in real time through the first pressure transmitter 15 on the double-layer isolation sleeve 6 and the second pressure transmitter 16 on the sealing bracket 7. If only the first pressure transmitter 15 shows a pressure change, it indicates that the inner layer of the isolation sleeve is leaking, but the outer layer remains sealed, and the equipment can continue to operate. If the second pressure transmitter 16 also shows pressure fluctuations, it indicates that the isolation sleeve has completely failed. At this time, the sealed cavity is gradually filled with medium to make the pressure constant again, and the equipment can still maintain operation. When the second constant value of the second pressure transmitter 16 is abnormal again, it indicates that the magnetic fluid bearing housing 10 may be leaking. At this time, the medium is safely discharged through the nitrogen discharge valve 11, and the equipment is stopped for maintenance.

[0037] In summary, the pressure-sealed cavity formed by the double-layer isolation sleeve 6, the sealing bracket 7, and the magnetic fluid bearing housing 10, combined with the multi-stage monitoring system of the first pressure transmitter 15 and the second pressure transmitter 16, achieves secondary protection against leakage of the magnetic pump: when the inner layer of the double-layer isolation sleeve 6 leaks, the first pressure transmitter 15 alarms but the equipment can still operate safely; in case of complete failure, secondary protection is achieved through the second pressure transmitter 16; all sealing brackets 7, outer magnetic rotor 8, and magnetic fluid bearing housing 10 that come into contact with the medium are made of corrosion-resistant materials to ensure long-term reliability. The structural design is simple and efficient. The water-cooling jacket (inlet pipe 12 / outlet pipe 13) equipped with the magnetic fluid bearing housing gives it a wide applicable temperature range, making it compatible with various types of magnetic pumps. While ensuring safety, it significantly improves the versatility and service life of the equipment.

[0038] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0039] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A magnetic pump with secondary protection for a magnetohydrodynamic bearing housing, comprising a pump body (1), characterized in that: A pump cover (3) is fixedly installed at one end of the pump body (1). A double-layer isolation sleeve (6) is fixedly connected to the back of the pump cover (3). A rotor system (2) is movably installed in the inner cavity of the double-layer isolation sleeve (6). A magnetic fluid bearing housing (10) is fixedly sleeved on the outer side of the double-layer isolation sleeve (6). A sealing bracket (7) is fixedly installed on the back of the pump body (1). The back of the sealing bracket (7) is fixedly connected to the magnetic fluid bearing housing (10). A first pressure transmitter (15) is fixedly installed on the outer side of the double-layer isolation sleeve (6). A second pressure transmitter (16) is fixedly installed on the outer side of the sealing bracket (7).

2. The magnetic pump with secondary protection for magnetohydrodynamic bearing housing according to claim 1, characterized in that: The inner layer of the double-layer isolation sleeve (6) and the outer layer of the isolation sleeve form an annular gap, and the double-layer isolation sleeve (6), the sealing bracket (7) and the magnetohydrodynamic bearing box (10) form a sealed pressure chamber.

3. The magnetic pump with secondary protection for magnetohydrodynamic bearing housing according to claim 2, characterized in that: The inner cavity of the rotor system (2) is fixedly installed with an inner magnetic rotor (14), the inner cavity of the magnetohydrodynamic bearing housing (10) is fixedly installed with an outer magnetic rotor (8), and the double-layer isolation sleeve (6) is radially arranged between the inner magnetic rotor (14) and the outer magnetic rotor (8).

4. The magnetic pump with secondary protection for magnetohydrodynamic bearing housing according to claim 3, characterized in that: A nitrogen discharge valve (11) is fixedly installed on the outside of the sealing bracket (7), a water inlet pipe (12) is fixedly installed on one side of the magnetic fluid bearing box (10), and a water outlet pipe (13) is fixedly installed on the other side of the magnetic fluid bearing box (10).

5. The magnetic pump with secondary protection for magnetohydrodynamic bearing housing according to claim 4, characterized in that: A sealing gasket (5) is fixedly installed at the connection between the pump cover (3) and the pump body (1), and a second sealing ring (9) is fixedly installed at the connection between the sealing bracket (7) and the magnetohydrodynamic bearing housing (10).

6. The magnetic pump with secondary protection for magnetohydrodynamic bearing housing according to claim 5, characterized in that: A first sealing ring (4) is fixedly installed at the joint surface between the pump cover (3) and the pump body (1).

7. The magnetic pump with secondary protection for magnetohydrodynamic bearing housing according to claim 6, characterized in that: The inner cavity of the water inlet pipe (12) is fixedly equipped with a filter screen, and the body of the water outlet pipe (13) is movably equipped with a flow regulating valve.

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