Air-cooling magnetic drive pump capable of performing dry operation

Abstract

The utility model relates to the technical field of pump equipment, in particular to a dry-running air-cooled magnetic drive pump, which comprises a pump body, an impeller, a driven shaft, a driving shaft, an inner magnetic rotor, a bracket, an isolation sleeve, an outer magnetic rotor, a connecting frame, a wind power circulating mechanism and a bearing box body, the pump body, the bracket and the bearing box body are sequentially connected, the connecting frame is arranged at the joint of the bracket and the bearing box body, and an air inlet is formed in the connecting frame; an air outlet is formed in one end, close to the pump body, of the bracket; the other end of the driven shaft is connected with the inner magnetic rotor; one end of the driving shaft close to the driven shaft is connected with an outer magnetic rotor; the isolation sleeve is located between the inner magnetic rotor and the outer magnetic rotor, gaps are formed between the isolation sleeve and the inner magnetic rotor and between the isolation sleeve and the outer magnetic rotor, a wind power circulation mechanism is arranged in the outer magnetic rotor, the wind power circulation mechanism and the isolation sleeve are arranged at intervals, and a through hole is formed in the outer magnetic rotor. Heat generated in the pump body can be taken away in time, the temperature in the pump is prevented from rising sharply, and stable operation of the magnetic drive pump is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pump equipment technology, and in particular to a dry-running air-cooled magnetic pump. Background Technology

[0002] A magnetic drive pump is a device that uses the magnetic transmission principle of internal and external magnetic rotors to drive the pump. It transmits the rotational power of the drive motor to the pump impeller through the non-contact magnetic transmission of the internal and external magnetic rotors, thereby achieving complete isolation between the pump's drive part and the medium being transported. It is particularly suitable for transporting flammable, explosive, toxic, corrosive, or valuable liquids.

[0003] Currently, fully sealed, leak-free, and corrosion-resistant magnetic drive centrifugal pumps (magnetic pumps) have become standard equipment widely used in petrochemical, pharmaceutical, energy, nuclear, and environmental protection sectors, and are widely used to transport various corrosive, flammable, explosive, and toxic media.

[0004] During operation, the inner and outer magnetic rotors generate eddy current heat due to the intersection of magnetic lines of force. This heat causes the internal temperature of the magnetic pump to rise. If the temperature becomes too high, the magnetic rotors will be demagnetized, causing the pump to stop operating. Normally, during normal operation, the magnetic pump is cooled by the medium inside the pump. During the medium circulation process, the medium carries away the heat. However, if the magnetic pump runs dry due to some special reason, such as a blockage at the medium inlet, no liquid entering, or failure to shut off the pump in time during unloading, the heat generated cannot be carried away in time. This heat cannot be discharged, causing the internal temperature of the pump to rise sharply. The inner and outer magnetic rotors demagnetize due to the temperature rise. In more serious cases, it can lead to a larger accident of the entire equipment, making the pump unable to operate stably, shortening the pump's operating cycle, and increasing the frequency of maintenance.

[0005] Therefore, how to ensure that the heat generated during the evacuation of the medium is carried away is an urgent problem to be solved. Utility Model Content

[0006] In order to solve the above-mentioned technical problems in the prior art, this utility model provides a dry-running air-cooled magnetic pump.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0008] This utility model provides a dry-running air-cooled magnetic pump, including a pump body, impeller, driven shaft, drive shaft, inner magnetic rotor, bracket, isolation sleeve, outer magnetic rotor, connecting frame, air circulation mechanism, and bearing housing; the pump body, bracket, and bearing housing are connected in sequence, the connecting frame is set at the connection between the bracket and the bearing housing, and an air inlet is opened on the connecting frame; an air outlet is opened at the end of the bracket near the pump body; a chamber is provided in the pump body, the impeller and driven shaft are located in the chamber, one end of the driven shaft is connected to the impeller, and the other end is connected to the inner magnetic rotor; the drive shaft is set in the bearing housing, and the end of the drive shaft near the driven shaft is connected to the outer magnetic rotor; the isolation sleeve is located between the inner magnetic rotor and the outer magnetic rotor, and there is a gap between the isolation sleeve and both the inner magnetic rotor and the outer magnetic rotor; an air circulation mechanism is provided inside the outer magnetic rotor, the air circulation mechanism is spaced apart from the isolation sleeve, and a through hole is opened on the outer magnetic rotor.

[0009] The dry-running air-cooled magnetic pump provided by this utility model introduces low-temperature airflow sequentially through the air inlet and through hole to the space between the isolation sleeve and the outer magnetic rotor. After convective heat exchange, the airflow is discharged through the air outlet, thereby carrying away the generated heat in time. During this process, the air circulation mechanism promotes the circulation of low-temperature airflow.

[0010] Based on the above technical solution, the present invention can also be improved in the following ways:

[0011] Furthermore, the through hole is located at one end of the external magnetic rotor near the air inlet.

[0012] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the timely introduction of newly entered low-temperature airflow between the isolation sleeve and the outer magnetic rotor, thereby achieving effective heat exchange and cooling, and preventing the low-temperature airflow from being discharged directly through the air outlet without heat exchange.

[0013] Furthermore, the air inlets are provided in multiple locations, and the multiple air inlets are distributed at intervals or symmetrically around the circumference of the connecting frame; the air outlets are provided in multiple locations, and the multiple air outlets are distributed at intervals or symmetrically around the circumference of the bracket; the through holes are provided in multiple locations, and the multiple through holes are distributed at intervals or symmetrically around the outer magnetic rotor.

[0014] Furthermore, the number of air inlets, air outlets, and through holes is the same.

[0015] The beneficial effects of adopting the above-mentioned further technical solutions are: ensuring the amount and effective flow of low-temperature airflow, and ensuring the heat exchange and cooling effect.

[0016] Furthermore, the connecting frame is provided with a channel for airflow to pass through, one end of which is connected to the air inlet and the other end is connected to the through hole.

[0017] Furthermore, the connecting frame is spaced apart from the external magnetic rotor.

[0018] The beneficial effects of adopting the above-mentioned further technical solutions are: to achieve effective circulation of low-temperature airflow entering through the air inlet, and to ensure the heat exchange and cooling effect of the low-temperature air path.

[0019] Furthermore, the open end of the isolation sleeve is located on the pump body.

[0020] Furthermore, the connecting frame is connected to the bearing housing by bolts.

[0021] Furthermore, it also includes a sliding bearing assembly and a thrust bearing assembly. The sliding bearing assembly includes a sliding bearing housing, a sliding bearing, and a bushing. The sliding bearing housing is fixed on the pump body, the bushing is sleeved on the driven shaft, and the sliding bearing is disposed between the sliding bearing housing and the bushing. The thrust bearing assembly is sleeved on the driven shaft.

[0022] Furthermore, it also includes a pump cover, which is installed at the end of the pump body away from the bearing housing.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the pump cover is used to seal the internal cavity of the pump body, ensuring that the inside of the pump body is isolated from the external environment, preventing media leakage and the entry of external pollutants, while facilitating the maintenance and repair of the internal components of the pump body by the staff.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] The dry-running air-cooled magnetic pump provided by this utility model introduces low-temperature airflow sequentially through the air inlet, channel, and through hole to the space between the isolation sleeve and the outer magnetic rotor. After convective heat exchange with the high-temperature gas in the pump body, the airflow is discharged through the air outlet under the action of the air circulation mechanism, thereby removing the heat generated in the pump body in a timely manner, maintaining the stability of the pump body temperature, avoiding a sharp rise in the pump body temperature, and ensuring the smooth operation of the magnetic pump. Attached Figure Description

[0026] Figure 1 This diagram shows a dry-operation air-cooled magnetic pump according to an embodiment of the present invention.

[0027] Figure label:

[0028] 1. Pump body; 2. Impeller; 3. Pump cover; 4. Driven shaft; 5. Sliding bearing assembly; 51. Sliding bearing seat; 52. Sliding bearing; 53. Shaft sleeve; 6. Drive shaft; 7. Thrust bearing assembly; 8. Inner magnetic rotor; 9. Bracket; 10. Isolation sleeve; 11. Outer magnetic rotor; 12. Connecting frame; 13. Air circulation mechanism; 14. Bearing housing; 15. Air inlet; 16. Air outlet; 17. Through hole; 18. Channel. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0030] See Figure 1A dry-operation air-cooled magnetic pump includes a pump body 1, an impeller 2, a driven shaft 4, a drive shaft 6, an inner magnetic rotor 8, a bracket 9, an isolation sleeve 10, an outer magnetic rotor 11, a connecting frame 12, an air circulation mechanism 13, and a bearing housing 14. The pump body 1, bracket 9, and bearing housing 14 are connected sequentially. The connecting frame 12 is located at the connection between the bracket 9 and the bearing housing 14, and an air inlet 15 is provided on the connecting frame 12. An air outlet 16 is provided at one end of the bracket 9 near the pump body 1. The pump body 1 has a chamber, in which the impeller 2 and driven shaft 4 are located. One end of the driven shaft 4 is connected to the impeller 2, and the other end is connected to the inner magnetic rotor 8. The drive shaft 6 is disposed in the bearing housing 14, and the end of the drive shaft 6 near the driven shaft 4 is connected to the outer magnetic rotor 11. The outer magnetic rotor 11 and the inner magnetic rotor 8 are driven by magnetic force without contact. The isolation sleeve 10 is located between the inner magnetic rotor 8 and the outer magnetic rotor 11, and the open end of the isolation sleeve 10 is located at the bearing housing 14. The pump body 1 has a gap between the isolation sleeve 10 and the inner magnetic rotor 8 and the outer magnetic rotor 11. The outer magnetic rotor 11 has an internal air circulation mechanism 13, which is spaced apart from the isolation sleeve 10. The connecting frame 12 is spaced apart from the outer magnetic rotor 11. The outer magnetic rotor 11 has a through hole 17 located at one end near the air inlet 15. The connecting frame 12 has a channel 18 for airflow. One end of the channel 18 is connected to the air inlet 15, and the other end is connected to the through hole 17. The low-temperature gas entering through the air inlet 15 flows through the channel 18, the gap between the connecting frame 12 and the outer magnetic rotor 11, and the through hole 17 in sequence before entering the space between the isolation sleeve 10 and the outer magnetic rotor 11. It undergoes convective heat exchange with the air here and circulates under the action of the wind circulation mechanism 13. It is then discharged through the air outlet 16, thereby carrying away the eddy current heat generated by the inner and outer magnetic rotors in a timely manner in the form of air cooling, and avoiding the temperature inside the pump from rising.

[0031] The wind circulation mechanism 13 is a fan. By setting the fan between the outer magnetic rotor 11 and the isolation sleeve 10, it is convenient to export the external air introduced into this space through the air inlet 15 through the air outlet 16 to form a circulating air, thereby using air cooling to remove the vortex heat.

[0032] The number of air inlets 15, air outlets 16, and through holes 17 are all two. Specifically, the two air inlets 15 are symmetrically arranged on the circumference of the connecting frame 12, the two air outlets 16 are symmetrically arranged on the circumference of the bracket 9, and the two through holes 17 are symmetrically arranged on the outer magnetic rotor 11. The two through holes 17 are respectively located close to the two air inlets 15 and away from the two air outlets 16 to prevent low-temperature airflow from being discharged directly through the air outlets 16 without heat exchange.

[0033] The connecting frame 12 is connected to the bearing housing 14 by bolts; the driven shaft 4 is circumferentially provided with a sliding bearing assembly 5 and a thrust bearing assembly 7. The sliding bearing assembly 5 includes a sliding bearing seat 51, a sliding bearing 52 and a bushing 53. The sliding bearing seat 51 is fixed on the pump body 1, the bushing 53 is sleeved on the driven shaft 4, and the sliding bearing 52 is disposed between the sliding bearing seat 51 and the bushing 53. The sliding bearing assembly 5 is used to improve the support stability and rotational accuracy of the driven shaft 4, reduce friction and wear, and improve the service life of the bearing and the driven shaft 4; the thrust bearing assembly 7 is sleeved on the driven shaft 4 to prevent the driven shaft 4 from moving axially.

[0034] A pump cover 3 is provided at the end of the pump body 1 away from the bearing housing 14 to seal the internal cavity of the pump body 1, ensuring that the inside of the pump body 1 is isolated from the external environment, preventing media leakage and external pollutants from entering, and at the same time facilitating the maintenance and repair of the internal components of the pump body 1 by the staff.

[0035] The dry-running air-cooled magnetic pump of this invention introduces low-temperature airflow sequentially through the air inlet 15, channel 18, and through hole 17 to the space between the isolation sleeve and the outer magnetic rotor. After convective heat exchange with the high-temperature gas inside the pump body 1, the airflow is discharged through the air outlet 16 under the action of the air circulation mechanism 13. This timely removes the eddy current heat generated by the inner magnetic rotor 8 and outer magnetic rotor 11 inside the pump body 1, maintains the temperature stability inside the pump body 1, avoids a sharp rise in the pump temperature, and ensures the smooth operation of the magnetic pump.

[0036] 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 dry-running, air-cooled magnetic pump, characterized in that, The pump body (1), impeller (2), driven shaft (4), drive shaft (6), inner magnetic rotor (8), bracket (9), isolation sleeve (10), outer magnetic rotor (11), connecting frame (12), air circulation mechanism (13), and bearing housing (14) are included. The pump body (1), bracket (9), and bearing housing (14) are connected in sequence. The connecting frame (12) is located at the connection between the bracket (9) and the bearing housing (14). An air inlet (15) is opened on the connecting frame (12). An air outlet (16) is opened at one end of the bracket (9) near the pump body (1). A chamber is provided inside the pump body (1), and the impeller (2) and driven shaft (4) are located in the chamber. Inside, one end of the driven shaft (4) is connected to the impeller (2), and the other end is connected to the inner magnetic rotor (8); the drive shaft (6) is located inside the bearing housing (14), and the end of the drive shaft (6) near the driven shaft (4) is connected to the outer magnetic rotor (11); the isolation sleeve (10) is located between the inner magnetic rotor (8) and the outer magnetic rotor (11), and there is a gap between it and both the inner magnetic rotor (8) and the outer magnetic rotor (11); the outer magnetic rotor (11) is provided with a wind circulation mechanism (13), and the wind circulation mechanism (13) is spaced apart from the isolation sleeve (10); the outer magnetic rotor (11) is provided with a through hole (17).

2. The dry-operational air-cooled magnetic pump according to claim 1, characterized in that, The through hole (17) is located at one end of the external magnetic rotor (11) near the air inlet (15).

3. The dry-operational air-cooled magnetic pump according to claim 1, characterized in that, The air inlets (15) are provided in multiples, and the multiple air inlets (15) are spaced apart or symmetrically distributed around the connecting frame (12); the air outlets (16) are provided in multiples, and the multiple air outlets (16) are spaced apart or symmetrically distributed around the bracket (9); the through holes (17) are provided in multiples, and the multiple through holes (17) are spaced apart or symmetrically distributed on the outer magnetic rotor (11).

4. The dry-operable air-cooled magnetic pump according to claim 3, characterized in that, The number of air inlets (15), air outlets (16), and through holes (17) is the same.

5. The dry-operable air-cooled magnetic pump according to claim 1, characterized in that, The connecting frame (12) is provided with a channel (18) for airflow to pass through. One end of the channel (18) is connected to the air inlet (15), and the other end is connected to the through hole (17).

6. The dry-operable air-cooled magnetic pump according to claim 5, characterized in that, The connecting frame (12) is spaced apart from the external magnetic rotor (11).

7. The dry-operable air-cooled magnetic pump according to claim 1, characterized in that, The open end of the isolation sleeve (10) is located on the pump body (1).

8. The dry-operable air-cooled magnetic pump according to claim 1, characterized in that, The connecting frame (12) is connected to the bearing housing (14) by bolts.

9. The dry-operable air-cooled magnetic pump according to claim 1, characterized in that, It also includes a sliding bearing assembly (5) and a thrust bearing assembly (7). The sliding bearing assembly (5) includes a sliding bearing seat (51), a sliding bearing (52) and a bushing (53). The sliding bearing seat (51) is fixed on the pump body (1). The bushing (53) is sleeved on the driven shaft (4). The sliding bearing (52) is disposed between the sliding bearing seat (51) and the bushing (53). The thrust bearing assembly (7) is sleeved on the driven shaft (4).

10. The dry-operable air-cooled magnetic pump according to claim 1, characterized in that, It also includes a pump cover (3), which is installed at one end of the pump body (1) away from the bearing housing (14).

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