CN216530946U

CN216530946U - Non-contact adjustable-speed slurry circulating pump system

Info

Publication number: CN216530946U
Application number: CN202123253874.2U
Authority: CN
Inventors: 李洪明; 陈章; 孙永; 江远; 杭云
Original assignee: Ma'anshan Dangtu Power Generation Co ltd
Current assignee: Ma'anshan Dangtu Power Generation Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-05-13
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a non-contact type speed-adjustable slurry circulating pump system, and belongs to the technical field of flue gas desulfurization. The slurry circulation pump comprises a slurry circulation pump and a motor, wherein a speed regulation unit is arranged between the slurry circulation pump and the motor, the speed regulation unit comprises a speed regulation controller, the speed regulation controller is connected with a winding rotor, the speed regulation controller is used for regulating the internal resistance of the winding rotor, the winding rotor is connected with a motor shaft on the motor, a permanent magnet rotor is sleeved on the periphery of the winding rotor, and the permanent magnet rotor is connected with a pump body shaft of the slurry circulation pump. In order to solve the technical problems in the prior art, the utility model aims to provide a non-contact type speed-adjustable slurry circulating pump system which is simple in structure and convenient to maintain, can realize non-contact type speed adjustment of a slurry circulating pump, and can meet the requirements of energy conservation and consumption reduction of a power plant.

Description

Non-contact adjustable-speed slurry circulating pump system

Technical Field

The utility model belongs to the technical field of flue gas desulfurization, and particularly relates to a non-contact type speed-adjustable slurry circulating pump system.

Background

The environmental protection standard of China is high, and the method especially has the effect of treating main pollutants SO in the power industry₂、NO_XHas been the most stringent worldwide standard, and the control of other pollutants, such as dust, has become more stringent. Slurry circulating pump in controlling SO₂The key auxiliary machine of the discharge index, the slurry circulating pump adopts a power frequency operation mode, the design parameter is larger, the outlet pressure is larger, the pump flow rate is as high as 10000m³And/h, because the size of the slurry circulating pump is large, the space of a pump room is limited, a standby small-flow pump is not provided usually, the slurry circulating pump is fully opened during the normal operation of the unit, and the margin of the slurry circulating pump is large and the energy consumption is high when the load of the unit changes and the sulfur content at an inlet changes. And the slurry circulating pump is used as a main device for desulfurization energy consumption, so that the energy conservation and the efficiency improvement of the slurry circulating pump become important.

The power consumption of the bituminous coal power plant desulfurization system is the largest during operation, the power consumption of the desulfurization system accounts for more than 1% of the total power generation amount of the whole power plant, and the standard coal consumption is up to 3-6g/kw.h, so that the operation optimization of the slurry circulating pump of the bituminous coal power plant has great space and practical significance for improving the economy of a thermal power generating unit and reducing the operation cost of the desulfurization system. The slurry circulating pump is used as important equipment in a limestone gypsum wet flue gas desulfurization system, the power consumption of the slurry circulating pump accounts for about 65-76 percent of the whole system, the power consumption of the slurry circulating pump accounts for a larger proportion, and the traditional slurry circulating pump combined operation mode is not beneficial to SO₂The regulation and control of the discharge index and the adjustment means are single, and the SO is discharged when the sulfur content is low and the load is low₂The minimum is reduced to 1-5mg/Nm³The surplus is too large, which causes a great waste of resources and power consumption, if 1 pump is shut down, the discharge of the outlet exceeds the standard, and the load and the SO at the inlet and the outlet are influenced by the external coal blending burning and the deep peak regulation work₂Concentration ofThe change is great, needs 4 slurry circulating pumps of long period maintenance to operate, under the prerequisite of how satisfying the ultralow emission requirement, reduces the power consumptive problem that the thermal power plant needs to solve urgently of desulfurization power plant.

Traditional speed reducer coupling connected mode can't realize the rotational speed regulation of slurry circulating pump, and the structure is complicated, and the fault rate is higher, and the pump is sent frequently and is stopped and easily cause the speed reducer to damage, and pump bearing case follows bad scheduling problem. Therefore, a speed regulating device of a slurry circulating pump, which has the advantages of high efficiency, energy conservation, high reliability, no rigid connection and torque transmission and can be applied in a severe environment, is urgently needed, so that the non-contact speed regulation is realized, the energy is saved, the consumption is reduced, the system maintenance is reduced, and the service life of the system is prolonged.

Through retrieval, some patents have been published about the structure of a slurry circulating pump with adjustable speed, such as Chinese patent application numbers: 2019219277601, discloses a slurry circulating pump permanent magnet adjusting machine set, including: the slurry pump comprises a driving motor, an upper base, a lower base, a conductor rotor, a permanent magnet rotor, a speed regulating wheel set and a slurry circulating pump, wherein the bottom of the upper base is provided with a driving wheel which moves on a slide rail in the lower base; by adopting the technical scheme, the driving wheel drives the upper base to move backwards for one station, so that the driving motor, the conductor rotor and the permanent magnet rotor are driven to simultaneously move backwards for one station, the second driving wheel on the driving rod is meshed with the second driven wheel on the connecting rod, and the speed reduction and the speed regulation are carried out on the slurry circulating pump; the drive wheel drives the upper base and moves a station backwards again, so that the third driving wheel on the driving rod is meshed with the third driven wheel on the connecting rod, further speed reduction and speed regulation are carried out on the slurry circulating pump, time and physical force are saved in the speed regulation process, and the working efficiency is greatly improved.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

In order to solve the technical problems in the prior art, the utility model aims to provide a non-contact type speed-adjustable slurry circulating pump system which is simple in structure and convenient to maintain, can realize non-contact type speed adjustment of a slurry circulating pump, and can meet the requirements of energy conservation and consumption reduction of a power plant.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model discloses a non-contact speed-adjustable slurry circulating pump system which comprises a slurry circulating pump and a motor, wherein a speed adjusting unit is arranged between the slurry circulating pump and the motor, the speed adjusting unit comprises a speed adjusting controller, the speed adjusting controller is connected with a winding rotor, the speed adjusting controller is used for adjusting the internal resistance of the winding rotor, the winding rotor is connected with a motor shaft on the motor, a permanent magnet rotor is sleeved on the periphery of the winding rotor, and the permanent magnet rotor is connected with a pump body shaft of the slurry circulating pump.

As a further improvement of the utility model, the permanent magnet rotor is connected with the output shaft, and the output end of the output shaft is connected with the pump body shaft through the middle connecting shaft.

As a further improvement of the utility model, a cooling fan is sleeved on the outer periphery of the motor shaft close to the motor side.

As a further improvement of the utility model, the cooling fan comprises a mounting ring sleeved on the periphery of the motor shaft, and a plurality of blades are uniformly arranged on the periphery of the mounting ring at intervals in the circumferential direction.

As a further improvement of the present invention, the speed regulating unit further includes an auxiliary control circuit connected to the winding rotor, wherein a carbon brush is further disposed on the auxiliary control circuit.

As a further improvement of the utility model, a first bearing is sleeved on the outer periphery of the motor shaft, and a second bearing is sleeved on the outer periphery of the output shaft.

As a further improvement of the utility model, the permanent magnet rotor comprises a permanent magnet sleeved on the periphery of the winding rotor, and the permanent magnet is fixed in the permanent magnet shell.

As a further improvement of the utility model, the speed regulation controller is connected with the PLC control module, and the motor is also connected with the PLC control module.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) according to the non-contact speed-adjustable slurry circulating pump system, the speed adjusting unit is used for adjusting the rotating speed of the slurry circulating pump, and the adjustment of the rotating speed and energy consumption of the slurry circulating pump can be realized along with the change conditions of sulfur at the inlet of the slurry circulating pump and the load of a unit, so that the purposes of energy conservation and consumption reduction are achieved.

(2) According to the non-contact type speed-adjustable slurry circulating pump system, the internal resistance of the winding rotor is changed through the speed-adjusting controller, the current in the winding is changed, and the winding torque is changed, so that the rotating speed of the slurry circulating pump is adjusted, the non-contact type starting between the motor and the slurry circulating pump is realized, the rigid connection is not needed to transmit the torque, the non-contact type speed-adjustable slurry circulating pump system can be applied to a severe environment, and the service life of the system is prolonged.

(3) According to the non-contact speed-adjustable slurry circulating pump system, the cooling fan is sleeved on the outer periphery of the motor shaft close to the motor side and used for dissipating heat and cooling in the non-contact slurry circulating pump, the cooling fan rotates along with the rotation of the motor shaft, extra energy is not consumed, and the aims of saving energy and reducing consumption are achieved.

(4) The non-contact type adjustable-speed slurry circulating pump system is simple in mechanical structure, maintenance cost after successful installation and debugging is greatly lower than that of other energy-saving products, operation and maintenance workload is small, and maintenance cost is low.

Drawings

FIG. 1 is a schematic view of an installation structure of a non-contact adjustable speed slurry circulation pump system according to the present invention;

fig. 2 is a schematic structural diagram of the speed regulating unit of the present invention.

The reference numbers in the figures are:

100. a slurry circulating pump; 110. a pump body shaft; 120. a middle connecting shaft; 200. a speed regulating unit; 210. a speed-regulating controller; 211. a carbon brush; 220. a motor shaft; 230. an output shaft; 240. a cooling fan; 250. a winding rotor; 251. a first bearing; 260. a permanent magnet rotor; 261. a permanent magnet; 262. a second bearing; 300. an electric motor.

Detailed Description

For a further understanding of the utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

With reference to fig. 1 and fig. 2, the non-contact speed-adjustable slurry circulation pump system of the embodiment includes a slurry circulation pump 100 and a motor 300, a speed adjusting unit 200 is disposed between the slurry circulation pump 100 and the motor 300, and the speed adjusting unit 200 is configured to adjust a rotation speed of the slurry circulation pump 100, so as to adjust rotation speed energy consumption of the slurry circulation pump 100 along with changes of sulfur at an inlet of the slurry circulation pump 100 and load of a unit, thereby achieving the purpose of energy saving and consumption reduction. The speed regulation unit 200 comprises a speed regulation controller 210, the speed regulation controller 210 is connected with a winding rotor 250, the speed regulation controller 210 is used for regulating the internal resistance of the winding rotor 250, the winding rotor 250 is connected with a motor shaft 220 on a motor 300, a permanent magnet rotor 260 is sleeved on the periphery of the winding rotor 250, and the permanent magnet rotor 260 is connected with a pump body shaft 110 of the slurry circulating pump 100. Specifically, in this embodiment, the permanent magnet rotor 260 is connected to the output shaft 230, the output end of the output shaft 230 is connected to the pump body shaft 110 through the intermediate connecting shaft 120, and the intermediate connecting shaft 120 is configured to reserve an overhaul space for later maintenance.

As shown in fig. 1, the non-contact slurry circulation pump speed adjusting device is installed between the motor and the pump, the winding rotor 250 is connected with the motor shaft 220, the permanent magnet rotor 260 is connected with the pump body shaft 230, and the winding rotor 250 passively cuts the magnetic lines of force of the permanent magnet rotor 260 to generate induced electromotive force when the motor 300 is started in no-load. The permanent magnet rotor 260 and the winding rotor 250 are not in contact with each other, an air gap exists between the two rotors, when the speed regulation controller 210 acts, the on-off state of an internal resistor is changed, the internal resistance value of a winding coil is changed, the current in the winding coil is further changed, speed difference between the permanent magnet rotor 260 and the winding rotor 250 generates induced electromotive force in the winding, the larger the current in the winding coil is, the larger the induced electromotive force is, the larger the interaction transmission torque between an electromagnetic field generated by the current in the winding and an original permanent magnetic field is, the higher the rotating speed of an output rotor is, and therefore the speed regulation function is realized. The winding is disconnected, no current exists in the winding, no torque is transmitted, the current in the winding is controlled, namely, the torque is controlled, and the speed regulation and soft start functions are achieved. In the speed regulation process, the internal resistance of the winding rotor 250 is changed through the speed regulation controller 210 in the speed regulation unit 200, the current in the winding is changed, and the winding torque is changed, so that the rotation speed regulation of the slurry circulating pump 100 is realized, the non-contact starting between the motor 300 and the slurry circulating pump 100 is realized, the rigid connection is not needed to transmit the torque, the motor can be applied in a severe environment, and the service life of the system is prolonged.

As shown in fig. 2, in the present embodiment, a cooling fan 240 is sleeved on the outer periphery of the motor shaft 220 near the motor 300 for dissipating heat and cooling in the non-contact slurry circulating pump. The cooling fan 240 comprises a mounting ring sleeved on the periphery of the motor shaft 220, a plurality of blades are uniformly arranged on the periphery of the mounting ring at intervals in the circumferential direction, and the cooling fan 240 rotates along with the rotation of the motor shaft 220 without consuming extra energy, so that the aims of saving energy and reducing consumption are fulfilled.

The speed regulating unit 200 in this embodiment further includes an auxiliary control circuit connected to the winding rotor 250, wherein a carbon brush 211 is further disposed on the auxiliary control circuit, and the carbon brush 211 is mounted on the motor shaft 220. The outer periphery of the motor shaft 220 is sleeved with a first bearing 251, and the outer periphery of the output shaft 230 is sleeved with a second bearing 262. The permanent magnet rotor 260 comprises a permanent magnet 261 sleeved on the periphery of the winding rotor 250, and the permanent magnet 261 is fixed in the permanent magnet shell. In this embodiment, the speed controller 210 is connected to the PLC control module, and the motor 300 is also connected to the PLC control module, and the motor 300 is controlled by the PLC control module to start and control the on/off state of the internal resistor of the speed controller 210. The slurry circulating pump system of the embodiment has a simple mechanical structure, maintenance cost after successful installation and debugging is greatly lower than that of other energy-saving products, and the operation and maintenance workload is small and the maintenance cost is low.

The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a slurry circulating pump system of non-contact adjustable speed which characterized in that: including slurry circulation pump (100) and motor (300), be provided with speed governing unit (200) between slurry circulation pump (100) and motor (300), wherein speed governing unit (200) are including speed governing controller (210), and speed governing controller (210) link to each other with winding rotor (250), speed governing controller (210) are used for adjusting the internal resistance of winding rotor (250), and winding rotor (250) link to each other with motor shaft (220) on motor (300), the periphery cover of winding rotor (250) is equipped with permanent magnet rotor (260), and permanent magnet rotor (260) link to each other with pump body axle (110) of slurry circulation pump (100).

2. A non-contact adjustable speed slurry circulation pump system according to claim 1, wherein: the permanent magnet rotor (260) is connected with the output shaft (230), and the output end of the output shaft (230) is connected with the pump body shaft (110) through the middle connecting shaft (120).

3. A non-contact adjustable speed slurry circulation pump system according to claim 2, wherein: a cooling fan (240) is sleeved on the outer periphery of the motor shaft (220) close to the motor (300).

4. A non-contact adjustable speed slurry circulation pump system according to claim 3, wherein: cooling fan (240) are including establishing the collar at motor shaft (220) periphery, and the periphery of collar encircles the even interval of circumference and is provided with a plurality of blades.

5. A non-contact adjustable speed slurry circulation pump system according to any one of claims 1-4, wherein: the speed regulation unit (200) further comprises an auxiliary control circuit connected with the winding rotor (250), wherein a carbon brush (211) is further arranged on the auxiliary control circuit.

6. A non-contact adjustable speed slurry circulation pump system according to claim 5, wherein: the periphery of the motor shaft (220) is sleeved with a first bearing (251), and the periphery of the output shaft (230) is sleeved with a second bearing (262).

7. A non-contact adjustable speed slurry circulation pump system according to claim 6, wherein: the permanent magnet rotor (260) comprises a permanent magnet (261) sleeved on the periphery of the winding rotor (250), and the permanent magnet (261) is fixed in the permanent magnet shell.

8. A non-contact adjustable speed slurry circulation pump system according to claim 7, wherein: the speed regulation controller (210) is connected with the PLC control module, and the motor (300) is also connected with the PLC control module.