CN217539024U

CN217539024U - Centrifugal pump with auxiliary magnetic resistance

Info

Publication number: CN217539024U
Application number: CN202022606007.1U
Authority: CN
Inventors: 李利剑
Original assignee: Carrier Pump Group Shanghai Co ltd
Current assignee: Carrier Pump Group Shanghai Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2022-10-04
Anticipated expiration: 2030-11-12

Abstract

The utility model provides a centrifugal pump with auxiliary magnetic resistance, including the centrifugal pump main part, its characterized in that, the centrifugal pump main part includes the pump body, be equipped with motor rotor and stator winding in the pump body, be equipped with a stator shielding cover between motor rotor and the stator winding, the last mounting groove of having seted up of motor rotor, the embedding has a magnetism groove in the mounting groove, still be equipped with pump shaft, motor shaft and shaft coupling in the centrifugal pump main part, the one end hookup motor shaft of shaft coupling, the other end and the pump shaft hookup of shaft coupling, and still be equipped with the sealed axle sleeve in the shaft coupling, the upper end cover of sealed axle sleeve is at the motor shaft, the lower extreme cover of sealed axle sleeve is at the pump shaft; a cooling cavity is further arranged in the centrifugal pump body, the cooling cavity is arranged around the stator winding, a return pipe is arranged in the cooling cavity, and the return pipe is communicated with the interior of the pump body; the outer wall of the pump body is provided with a frequency converter, and the frequency converter is positioned on the outer side of the cooling cavity.

Description

Centrifugal pump with auxiliary magnetic resistance

Technical Field

The utility model relates to a centrifugal pump, in particular to novel reluctance electric pump of circulating water cooling mode who uses on centrifugal pump.

Background

The main power source of the traditional centrifugal pump is a three-phase asynchronous motor, and the three-phase asynchronous motor drives an impeller of a water pump to rotate at a high speed so as to convert mechanical energy into energy of liquid. Due to the fact that the motor rotates at a high speed, noise is generated, and physical and psychological health of people is often influenced when people live in an environment with high noise for a long time. In addition, the traditional centrifugal pump has low motor operation efficiency under the working condition of frequency conversion, thus causing energy waste. Along with the development of motor, scientific research personnel have researched and developed supplementary reluctance motor, supplementary reluctance motor has following characteristics:

1. high efficiency and good energy-saving effect. The power saving effect is more obvious at low speed.

2. The starting torque is large, and the starting device is suitable for heavy-load starting and occasions where the load change is obvious and the starting is frequent. Tests show that when the starting torque reaches 150% of the rated torque, the starting current is only 30% of the rated current, and the advantages are very obvious

3. The speed regulation range is wide. The switch-assisted reluctance motor can run for a long time at low speed, and because of high efficiency, the temperature rise degree at low speed is lower than that under rated working condition, the problem of heating of the motor when the variable-frequency speed-regulating motor runs at low speed is solved, and the highest rotating speed can be flexibly set according to actual conditions.

4. The starting current is small, and the impact on a power grid is avoided. The switch auxiliary reluctance motor has soft start characteristic and does not have the phenomenon that the starting current of a common alternating current motor is more than 5-7 times of rated current.

5. The power factor is high, and a reactive compensation device is not required to be added.

6. Can still work when in phase failure and overload. When the power supply is in phase failure, and any phase of the motor or the controller is in failure, the output power of the motor is reduced and the motor can still operate. When the system exceeds the load by more than 120%, the rotating speed and the rotating speed only can be reduced, and the motor and the control cabinet cannot be burnt.

SUMMERY OF THE UTILITY MODEL

Problem to prior art exists, the utility model provides a centrifugal pump with supplementary magnetic resistance to solve the problem of above-mentioned at least one kind of technique.

The technical scheme of the utility model is that: a centrifugal pump with an auxiliary magnetic resistance comprises a centrifugal pump main body and is characterized in that the centrifugal pump main body comprises a pump body, a motor rotor and a stator winding are arranged in the pump body, a stator shielding sleeve is arranged between the motor rotor and the stator winding, a mounting groove is formed in the motor rotor, a magnetic groove is embedded in the mounting groove, a pump shaft, a motor shaft and a coupling are further arranged in the centrifugal pump main body, one end of the coupling is connected with the motor shaft, the other end of the coupling is connected with the pump shaft, a sealing shaft sleeve is further arranged in the coupling, the upper end of the sealing shaft sleeve is sleeved on the motor shaft, and the lower end of the sealing shaft sleeve is sleeved on the pump shaft;

a cooling cavity is further arranged in the centrifugal pump body, the cooling cavity is arranged around the stator winding, a return pipe is arranged in the cooling cavity, and the return pipe is communicated with the interior of the pump body;

and a frequency converter is arranged on the outer wall of the pump body and is positioned on the outer side of the cooling cavity.

The utility model discloses set up the cooling chamber, the high pressure water that the centrifugal pump produced flows into the cooling chamber through the input tube by the high-pressure chamber, flows back to the low-pressure chamber of centrifugal pump through the back flow again. The frequency converter has the functions of protecting the motor from overload, overcurrent, open-phase short circuit protection and the like, and the temperature of the stator winding can be reduced through the cooling cavity, so that the frequency converter can be cooled. The utility model discloses increased the stator shield cover, it is sealed, do not have, leak, can not cause secondary pollution, more can prevent motor high temperature, intake.

Further preferably, a high-pressure cavity and a low-pressure cavity are further arranged in the pump body, the high-pressure cavity and the low-pressure cavity are respectively communicated with the pump body, the high-pressure cavity is communicated with the motor shaft through a through hole, the motor shaft is communicated with the low-pressure cavity through a water return pipe, and high-pressure water of the centrifugal pump main body flows through the high-pressure cavity.

The utility model discloses a water under high pressure that the centrifugal pump produced flows in the low pressure chamber that the motor shaft flowed in the centrifugal pump again through the wet return by high pressure chamber through the through-hole, takes away the temperature that the motor operation in-process produced, has effectively reduced the temperature.

Further preferably, a water and ink bearing is sleeved at the top of the motor shaft. The ink bearing has better wear-resisting and waterproof functions, and the service life of the motor is prolonged.

Further preferably, the joint of the sealing shaft sleeve and the motor shaft is provided with at least two sealing rings. Further improving the sealing effect.

Further preferably, an input pipe is further installed in the cooling cavity, the input pipe is communicated with the pump body, and the length of the input pipe is smaller than that of the return pipe.

The utility model discloses an increase an input tube and can accelerate the cooling.

Further preferably, the corners of the cooling chamber are curved. The shuttling of liquids can be facilitated.

Further preferably, the top of the return pipe is inclined.

Thereby improving the contact surface and facilitating the entry of high-pressure liquid.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: the centrifugal pump comprises a centrifugal pump body 1, a stator winding 2, a pump shaft 3, a motor shaft 4, a water return pipe 5, a coupler 7, a sealing shaft sleeve 6, a sealing ring 8, a magnetic air groove 9, a motor rotor 10, an input pipe 11, a return pipe 12, a low-pressure cavity 13, a high-pressure cavity 14, a through hole 15, a mounting groove 16, a cooling cavity 17, a frequency converter 18, a stator shielding sleeve 19 and a water-ink bearing 20.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, a centrifugal pump with an auxiliary magnetic resistance comprises a centrifugal pump main body 1, the centrifugal pump main body comprises a pump body, a motor rotor 10 and a stator winding 2 are arranged in the pump body, a stator shielding sleeve 19 is arranged between the motor rotor and the stator winding, a mounting groove 16 is formed in the motor rotor, a magnetic groove 9 is embedded in the mounting groove, a pump shaft 3, a motor shaft 4 and a coupling 6 are further arranged in the centrifugal pump main body, one end of the coupling is connected with the motor shaft, the other end of the coupling is connected with the pump shaft, a sealing shaft sleeve 7 is further arranged in the coupling, the upper end of the sealing shaft sleeve is sleeved on the motor shaft, and the lower end of the sealing shaft sleeve is sleeved on the pump shaft; a cooling cavity 17 is also arranged in the centrifugal pump main body, the cooling cavity is arranged around the stator winding, a return pipe 12 is arranged in the cooling cavity, and the return pipe is communicated with the interior of the pump body; and a frequency converter 18 is arranged on the outer wall of the pump body and is positioned on the outer side of the cooling cavity.

The utility model discloses set up the cooling chamber, the water under high pressure that the centrifugal pump produced flows into the cooling chamber by the high-pressure chamber through the input tube, flows back to the low-pressure chamber of centrifugal pump through the back flow again. The frequency converter has the functions of protecting the motor from overload, overcurrent, open-phase short circuit and the like, and not only can the temperature of the stator winding be reduced through the cooling cavity, but also the frequency converter can be cooled. The utility model discloses increased the stator shield cover, it is sealed, do not have, leak, can not cause secondary pollution, more can prevent motor high temperature, intake.

Further preferably, a high-pressure cavity 14 and a low-pressure cavity 13 are further arranged in the pump body, the high-pressure cavity and the low-pressure cavity are respectively communicated with the pump body, the high-pressure cavity is communicated with the motor shaft through a through hole 15, the motor shaft is communicated with the low-pressure cavity through a water return pipe 5, and high-pressure water of the centrifugal pump main body flows through the high-pressure cavity. The utility model discloses a water under high pressure that the centrifugal pump produced flows in the motor shaft through the through-hole by the high pressure chamber and flows in the low pressure chamber of centrifugal pump again through the wet return, takes away the temperature that the motor operation in-process produced, has effectively reduced the temperature.

Further preferably, the top of the motor shaft is sleeved with a water and ink bearing 20. The ink bearing has better wear-resisting and waterproof functions, and the service life of the motor is prolonged.

Further preferably, at least two sealing rings 8 are arranged at the joint of the sealing shaft sleeve and the motor shaft. Further improving the sealing effect.

Further preferably, an input pipe 11 is further installed in the cooling cavity, the input pipe is communicated with the pump body, and the length of the input pipe is smaller than that of the return pipe. The utility model discloses an increase an input tube and can accelerate the cooling.

Further preferably, the corners of the cooling chamber are curved. Can facilitate the shuttling of the liquid.

Further preferably, the top of the return pipe is inclined. Thereby improving the contact surface and facilitating the entry of high-pressure liquid.

Further preferably, the frequency converter is an intelligent frequency converter. The utility model discloses select for use the intelligent converter of market to purchase that can reduce cost.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A centrifugal pump with auxiliary magnetic resistance comprises a centrifugal pump main body and is characterized in that the centrifugal pump main body comprises a pump body, a motor rotor and a stator winding are arranged in the pump body, a stator shielding sleeve is arranged between the motor rotor and the stator winding, a mounting groove is formed in the motor rotor, a magnetic groove is embedded in the mounting groove, a pump shaft, a motor shaft and a coupler are further arranged in the centrifugal pump main body, one end of the coupler is connected with the motor shaft, the other end of the coupler is connected with the pump shaft, a sealing shaft sleeve is further arranged in the coupler, the upper end of the sealing shaft sleeve is sleeved on the motor shaft, and the lower end of the sealing shaft sleeve is sleeved on the pump shaft;

the outer wall of the pump body is provided with a frequency converter, and the frequency converter is positioned at the outer side of the cooling cavity.

2. A centrifugal pump with auxiliary reluctance according to claim 1, wherein: still be equipped with high-pressure chamber and low pressure chamber in the pump body, high-pressure chamber with the low pressure chamber respectively with the pump body switches on, high-pressure chamber through the through-hole with the motor shaft switches on, the motor shaft through the wet return with the low pressure chamber switches on, the high-pressure intracavity has flowed through the water under high pressure of centrifugal pump main part.

3. A centrifugal pump with auxiliary reluctance according to claim 1, wherein: and a water and ink bearing is sleeved at the top of the motor shaft.

4. A centrifugal pump with auxiliary reluctance according to claim 1, wherein: and at least two sealing rings are arranged at the joint of the sealing shaft sleeve and the motor shaft.

5. A centrifugal pump with auxiliary reluctance according to claim 1, wherein: an input pipe is further installed in the cooling cavity and communicated with the pump body, and the length of the input pipe is smaller than that of the return pipe.

6. A centrifugal pump with auxiliary reluctance according to claim 1, wherein: the corner of the cooling cavity is arc-shaped.

7. A centrifugal pump with auxiliary reluctance according to claim 1, wherein: the top of the return pipe is an inclined plane.