CN217607601U - Single-bearing permanent magnet direct drive motor system for powder concentrator - Google Patents

Abstract

The invention relates to a single-bearing permanent magnet direct drive motor system for a powder concentrator, wherein a motor is vertically arranged right above the center of a powder concentrator (3), and a motor spindle (11) and a powder concentrator body shaft (6) are concentric shafts; a non-shaft extension end cover (12) at the top end of the motor is provided with a motor single bearing (13), a shaft extension end cover (10) at the bottom end of the motor is not provided with a bearing, and the permanent magnet direct drive motor is of a single bearing structure; the motor main shaft (11) and the powder concentrator body shaft (6) are connected into a whole in the motor mounting base (2) through an elastic pin coupling (8). The single bearing is utilized to effectively improve the concentricity of the powder concentrator shaft and the motor shaft, and the heating of the bearing is reduced, so that the reliability of the system is improved, the installation is simple, the cost is low, the noise is reduced, the operation is more convenient, the practicability, the stability and the convenience are improved, and the service life of the motor is prolonged.

Description

Single-bearing permanent magnet direct drive motor system for powder concentrator

Technical Field

The utility model relates to a single bearing permanent magnetism direct drive motor system for selection powder machine belongs to selection powder machine driving motor application technical field.

Background

At present, a driving system of large powder concentrator equipment in a cement production line is mostly provided with a driving mode of an alternating-current asynchronous motor and a vertical speed reducer, and in practical application, the driving system of the powder concentrator is a link with higher failure rate and is equipment with higher installation position in the whole cement production line, so that the maintenance cost is high, and the period is long. Along with the continuous improvement of motor technology and drive control technology in recent two years, more and more application manufacturers put forward higher requirements on equipment, and the drive system with low efficiency, high failure rate, poor reliability and high energy consumption can not adapt to the drive requirement of the modern cement industry and can not meet the current national policy of high efficiency, energy conservation and emission reduction in China.

In addition, in practical application, the shaft for the powder concentrator body and the shaft of the speed reducer II are concentric shafts. Because the rotor shaft system of the powder concentrator is longer, a set of thrust bearing is generally selected at the upper end, and a set of spherical roller bearing is selected at the lower end; and two ends of the shaft II of the speed reducer are generally respectively provided with a set of tapered roller bearings. And the rotor of the powder concentrator is connected with the shaft II of the vertical speed reducer by an Oldham coupling capable of compensating for larger radial, angular and axial deviations. Because the two concentric shafts are influenced by field installation conditions, the installation precision is low, the powder concentrator vibrates in a starting and stopping state, the deflection is large, and the like, the abrasion of a compensation element is serious, the failure rate of a system is high, the service life is short, and the like. The method and the device aim to fundamentally solve the problems of high system failure rate, poor reliability and the like.

The in-process that the technical scheme of this patent application formed, at first, decides to use permanent magnetism to directly drive the drive mode that the motor replaces traditional alternating current asynchronous motor + vertical speed reducer, and secondly, the innovation is fit for the permanent magnetism of selection powder machine structure and operating condition and directly drives the motor structure. In the innovation process of the permanent magnet direct drive motor structure, various technical schemes are tried: in the past, the rotor shaft of the powder concentrator is directly connected with the rotor shaft of the motor, the rotor of the motor is supported by a bearing of a powder concentrator body, the motor adopts a bearingless structure, the structure of the motor is similar to that of Chinese patent CN201710142213, and the name of the permanent magnet direct drive motor for the centrifugal powder concentrator and an installation method is' however, the structure has inherent defects, radial displacement generated by the rotor shaft of the powder concentrator in rotation cannot be overcome, accidents such as motor chamber sweeping and the like are easily caused, and the scheme is eliminated. In addition, a scheme that a motor is adopted for reinforcing a shafting support and a set of support bearing is added on a motor rotor shaft is considered, the scheme is similar to Chinese patent CN201910230358 and the name "a permanent magnet single-bearing motor and an integrated compressor utilizing the motor", but the structure described in the patent cannot be directly borrowed because the motor of the compressor is of a horizontal structure and the motor of the powder concentrator is of a vertical structure, so that the stress of the rotor on the support bearing is different. The prior art does not have suitable reference to the related technical contents and does not have the related technical suggestions.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a single bearing permanent magnetism direct drive motor system for selection powder machine, the specially adapted uses on the selection powder machine, and the reliability is high, need not maintain almost, productivity gain, reduction in production cost, no oil leakage etc. run out the drip phenomenon, effectively improve the concentricity of selection powder machine axle and motor shaft, extension motor life, solve the above-mentioned technical problem who exists among the background art.

The technical scheme of the utility model is that:

a single-bearing permanent magnet direct drive motor system for a powder concentrator is characterized in that a motor is vertically arranged right above the center of the powder concentrator, and a main shaft of the motor and a main body shaft of the powder concentrator are concentric shafts; the non-shaft-extension end cover at the top end of the motor is provided with a motor single bearing, the shaft-extension end cover at the bottom end of the motor is not provided with a bearing, and the permanent magnet direct drive motor is of a single bearing structure; a discharge port of the powder concentrator is provided with a support rib plate, the support rib plate is provided with a motor mounting base, the bottom of the motor mounting base is provided with a bearing at the upper end of the powder concentrator, and a powder concentrator body shaft penetrates through the bearing at the upper end of the powder concentrator; the top of the motor mounting base is provided with a motor mounting base upper flange, and the motor is vertically mounted on the motor mounting base upper flange through a shaft extension end cover; the motor main shaft and the powder concentrator body shaft are connected into a whole in the motor mounting base through the elastic pin coupling.

The elastic pin coupling is connected with the upper coupling through an elastic pin in a matched mode through the lower coupling, the top end of the powder concentrator body shaft is connected with the lower coupling, the bottom end of the motor main shaft is connected with the upper coupling, a groove is formed in the center of the end face of the upper coupling, the bottom end of the motor main shaft fixes the fixing plate on the end face through a fixing bolt, the width of the fixing plate is smaller than that of the groove, and the motor main shaft is located in the groove of the upper coupling through the fixing plate.

And a rotor is arranged on the motor main shaft and is matched with a stator arranged on the machine base.

The non-shaft extension end cover on motor spindle top is equipped with waste oil collection device and automatic grease squirt, automatic grease squirt is through adding one side of oil union coupling motor single bearing, waste oil collection device passes through the opposite side of waste oil collecting pipe connection motor single bearing, the position that automatic grease squirt and oil filling pipe are higher than waste oil collection device and waste oil collecting pipe, the lubricating oil that automatic grease squirt was annotated gets into behind the motor single bearing and relies on the action of gravity to get into waste oil collection device through waste oil collecting pipe.

The automatic oil ejector is used for regularly filling lubricating oil into the single bearing of the motor; the waste oil collecting pipe is connected with the waste oil collecting device through a waste oil collecting pipe joint; the waste oil collecting device is arranged on the non-shaft-extension end cover through a waste oil collecting device supporting rod.

The utility model discloses a forced air cooling mode, the heat-sinking capability is strong to set up the motor terminal box on the base that is close to selection powder machine one end, cooling fan sets up and is keeping away from selection powder machine one end, and the cooling fan terminal box is located cooling fan cover's topmost, and the cooling channel of air gap is more unobstructed between motor stator and the rotor like this, and the cooling effect is more excellent, and then reduces permanent-magnet motor's whole volume.

The utility model has the advantages that: the novel powder concentrator is particularly suitable for being applied to a powder concentrator, has high reliability, almost does not need maintenance, improves the productivity, reduces the production cost, has no leakage phenomenon such as oil leakage, leakage and dripping, effectively improves the concentricity of a shaft and a motor shaft of the powder concentrator, and prolongs the service life of the motor. The utility model discloses utilize single bearing (selection powder machine upper end bearing) effectively to improve the concentricity of selection powder spindle and motor shaft, reduced the bearing and generated heat to improve system reliability, install simple, with low costs, noise reduction, more convenient, increased practicality, stability and convenience, extension motor life. The permanent magnet direct drive motor is used for replacing an asynchronous motor and a vertical speed reducer, a large amount of funds are saved in the aspects of active electric energy, reactive compensation, line loss and the like every year, and the comprehensive power saving rate reaches 10% -40%.

Drawings

Fig. 1 is an installation schematic diagram of a powder concentrator and a permanent magnet direct drive motor according to an embodiment of the present invention;

FIG. 2 is a schematic view of the connection between shafts according to the embodiment of the present invention;

FIG. 3 is an outline view of a motor according to an embodiment of the present invention;

fig. 4 is a schematic view of a motor transportation tool according to an embodiment of the present invention;

fig. 5 is a schematic view of an internal structure of a motor according to an embodiment of the present invention;

FIG. 6 is a schematic view of oiling a motor according to an embodiment of the present invention;

fig. 7 is a schematic view of a motor rotor assembly fixture according to an embodiment of the present invention;

FIG. 8 is a structural diagram of a motor rotor assembling tool according to an embodiment of the present invention;

in the figure: the device comprises a permanent magnet direct drive motor 1, a motor mounting base 2, a powder concentrator 3, a powder concentrator shaft tail end fixing device 4, a powder concentrator lower end bearing 5, a powder concentrator body shaft 6, a powder concentrator upper end bearing 7, an elastic pin coupling 8, a motor mounting base upper flange 9, a shaft extension end cover 10, a motor spindle 11, a non-shaft extension end cover 12, a motor single bearing 13, a motor junction box 14, a cooling fan junction box 15, a motor delivery bolt 16, a motor delivery fixing block 17, a fixing block upper step 17-1, a fixing block lower step 17-2, a rotor 18, a stator 19, a machine base 20, a waste oil collecting device 21, an automatic oil injector 22, an oil filling pipe 23, a process end plate 24, an end plate outer ring plate 24-1, an end plate inner ring plate 24-2, an end plate connecting rib 24-3, a positioning ring 25, an elastic pin 26, a groove 27, a fixing plate 28, a fixing bolt 29, a lower coupling 30, an upper coupling 31, a motor single bearing upper shell 32, a motor delivery bolt second 33, a process plate mounting hole 34, a positioning ring mounting hole 35, a positioning ring mounting hole 36, a motor mounting hole 37, a waste oil collecting hole 38, a waste oil collecting main shaft collecting device 40, a waste oil collecting device collecting hole 41, a waste oil collecting device collecting rod collecting device 40 and a waste oil collecting hole collecting device.

Detailed Description

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

A single-bearing permanent magnet direct drive motor system for a powder concentrator is characterized in that a motor is vertically arranged right above the center of a powder concentrator 3, and a motor main shaft 11 and a powder concentrator body shaft 6 are concentric shafts; a non-shaft extension end cover 12 at the top end of the motor is provided with a motor single bearing 13, a shaft extension end cover 10 at the bottom end of the motor is not provided with a bearing, and the permanent magnet direct drive motor is of a single bearing structure; a discharge port 39 of the powder concentrator 3 is provided with a support rib plate 40, the support rib plate 40 is provided with a motor mounting base 2, the bottom of the motor mounting base 2 is provided with a powder concentrator upper end bearing 7, and a powder concentrator body shaft 6 penetrates through the powder concentrator upper end bearing 7; the top of the motor mounting base 2 is provided with a motor mounting base upper flange 9, and the motor is vertically mounted on the motor mounting base upper flange 9 through a shaft extension end cover 10; the motor main shaft 11 and the powder concentrator body shaft 6 are connected into a whole in the motor mounting base 2 through an elastic pin coupling 8.

The elastic pin coupling 8 is formed by matching a lower coupling 30 and an upper coupling 31 and is connected together through an elastic pin 26, the top end of the powder concentrator body shaft 6 is connected with the lower coupling 30, the bottom end of the motor main shaft 11 is connected with the upper coupling 31, a groove 27 is formed in the center of the end face of the upper coupling 31, the bottom end of the motor main shaft 11 fixes a fixing plate 28 on the end face through a fixing bolt 29, the width of the fixing plate 28 is smaller than that of the groove 27, and the motor main shaft 11 is positioned in the groove 27 of the upper coupling 31 through the fixing plate 28.

The motor spindle 11 is provided with a rotor 18 which is matched with a stator 19 arranged on a machine base 20.

Be equipped with waste oil collection device 21 and automatic oiling ware 22 on the non-axle that stretches on motor main shaft 11 top end cover 12, automatic oiling ware 22 passes through one side that adds oil pipe 23 and connect motor single bearing 13, waste oil collection device 21 passes through the opposite side that waste oil collecting pipe 42 connects motor single bearing 13, the position of automatic oiling ware 22 and oil pipe 23 is higher than the position of waste oil collection device 21 and waste oil collecting pipe 42, the lubricating oil that automatic oiling ware 22 was annotated gets into motor single bearing 13 after relies on the action of gravity to get into waste oil collection device 21 through waste oil collecting pipe 42.

The automatic oil ejector 22 is used for regularly filling lubricating oil into the motor single bearing 13; the waste oil collecting pipe 42 is connected with the waste oil collecting device 21 through a waste oil collecting pipe joint 43; the waste oil collecting device 21 is arranged on the non-shaft-extension end cover 12 through a waste oil collecting device support rod 41.

The utility model discloses forced air cooling mode, heat-sinking capability is strong, sets up motor terminal box 14 on the base 20 that is close to selection powder machine one end, and cooling fan sets up and is keeping away from selection powder machine one end, and cooling fan terminal box 15 is located cooling fan cover 38 topmost, and the cooling channel of air gap is more unobstructed between motor stator and the rotor like this, and the cooling effect is more excellent, and then reduces permanent magnet motor's whole volume.

Referring to fig. 4, 7 and 8, as the motor single bearing assembly is adopted, the motor rotor assembly tool is adopted for auxiliary assembly, and the motor rotor assembly tool comprises a process end plate 24 and a positioning ring 25, wherein the process end plate 24 forms an inner ring structure by an end plate outer ring plate 24-1 and an end plate inner ring plate 24-2, the end plate outer ring plate 24-1 and the end plate inner ring plate 24-2 are connected into a whole by an end plate connecting rib 24-3, the end plate outer ring plate 24-1 is provided with an annular step and is matched with a spigot of a shaft extension end cover 10 of a motor, the center of the end plate inner ring plate 24-2 is a motor spindle hole 36, the inner side of the end plate inner ring plate 24-2 is close to the motor spindle hole 36 and is provided with an annular mounting step 37, the positioning ring 25 is arranged in the annular mounting step 37, and the positioning ring 25 is made of a non-metal material and is close to the motor spindle 11; when the motor main shaft 11 is assembled, the top end of the motor main shaft 11 is positioned through the motor single bearing 13, the bottom end of the motor main shaft 11 is positioned through the motor rotor assembling tool, the end plate outer ring plate 24-1 of the motor rotor assembling tool is in transition fit with the spigot of the shaft extension end cover 10 for positioning, the coaxiality of the base and the process end plate 24 is ensured, the positioning ring 25 assembled by the end plate inner ring plate 24-2 is made of a non-metal material, the single-side gap between the inner hole of the positioning ring 25 and the motor main shaft is set to be 0.5mm, the motor main shaft is not damaged in the assembling process, and the requirement of an air gap between a motor stator and a rotor can be ensured;

in the motor transportation process, in order to prevent the motor spindle from generating axial displacement, a transportation tool is used for positioning on a non-shaft extension end cover 12 at the top end of the motor, the transportation tool is an annular motor transmission fixing block 17, an outer ring end part of the motor transmission fixing block 17 is respectively provided with a fixing block upper step 17-1 and a fixing block lower step 17-2 from top to bottom, the fixing block upper step 17-1 is connected with a motor single bearing upper shell 32 through a motor transmission bolt I16, the fixing block lower step 17-2 is connected with the upper end face of the motor spindle 11 through a motor transmission bolt II 33, the motor spindle 11 is axially positioned, the axial displacement is avoided in the transportation process, and the corresponding tool is disassembled after the motor is transported to a site for assembly.

A process plate mounting hole 34 is formed in an end plate outer ring plate 24-1 of the motor rotor assembly tool, and the end plate outer ring plate 24-1 and the shaft extension end cover 10 are fixedly positioned through screws; the inner ring plate 24-2 of the end plate is provided with a positioning ring mounting hole 35, and the positioning ring 25 is fixed on an annular mounting step 37 through a screw.

In the embodiment, the single-bearing permanent magnet direct drive motor special for the powder concentrator is a vertical forced air cooling structure with a downward flange.

The motor is of an inner rotor structure, namely a rotor 18 is positioned inside a machine base 20,

the non-shaft-extension end cover 12 is fixed at the upper end (i.e. the end far away from the powder concentrator) of the base 20, the shaft-extension end cover 10 is arranged at the lower end (i.e. the end close to the powder concentrator) of the base 20 and is connected with the upper flange 9 of the motor mounting base at the top of the motor mounting base 2 through a connecting bolt and a reaming bolt, the fixed shaft-extension end cover 10 is not provided with a bearing to support the motor spindle 11, and the lower end of the motor spindle 11 is directly connected with the upper end of the powder concentrator body shaft 6 through a set of elastic pin shaft coupling.

The utility model discloses utilize single bearing (selection powder machine upper end bearing 7) effectively to improve the concentricity of selection powder spindle and motor shaft, reduced the bearing and generated heat to improve system reliability, install simple, with low costs, noise reduction, more convenient, increased practicality, stability and convenience, extension motor life.

The rotor 18 of the motor adopts an advanced permanent magnet with ultrahigh intrinsic coercivity, has enough intrinsic coercivity and magnetic coercive force, and has the advantages of high power factor, high mechanical efficiency, low loss, large starting torque, low temperature rise, reliable operation, attractive appearance and the like compared with an asynchronous motor with the same power by using the excitation mode.

In addition, the working temperature of the rotor magnetic steel can reach 150 degrees, which is far higher than the actual rotor temperature of the motor, and the permanent magnet demagnetization rate is not more than 0.1% every year. The magnetic steel is in a surface-mounted form, and the magnetic steel structural adhesive and the magnetic steel high-strength stainless steel magnetic isolation layer protection device are fixedly mounted, so that the use efficiency of a magnetic field is ensured, and the magnetic leakage is lower than 5%.

The permanent magnet direct drive motor is used for replacing an asynchronous motor and a vertical speed reducer, a large amount of funds are saved in the aspects of active electric energy, reactive compensation, line loss and the like every year, and the comprehensive power saving rate reaches 10% -40%.

The stator 17 winding adopts H-level enameled wire to form a coil and is integrally VPI-dipped in paint, so that the insulation performance of the winding is improved.

The machine base 20 is in interference fit with the spigot of the non-shaft extension end cover 12, and the cable outlet pipe and each process hole are also sealed by rubber plates, so that the electromagnetic part is completely isolated from the outside. The full-sealing structure completely meets the environment of large dust in the cement production field.

The utility model discloses a forced air cooling mode, the heat-sinking capability is strong to set up motor terminal box 14 on the base 20 that is close to selection powder machine one end, cooling fan sets up and is keeping away from selection powder machine one end, and cooling fan terminal box 15 is located cooling fan cover 38 topmost, and the cooling channel of air gap is more unobstructed between motor stator and the rotor like this, and the cooling effect is more excellent, and then reduces permanent magnet motor's whole volume.

The low-frequency power supply and control of the single-bearing permanent magnet direct drive motor are provided by a heavy-load variable-frequency driving device; the single-bearing permanent magnet direct drive motor and the heavy-load variable frequency driving device form a permanent magnet direct drive motor system, and the system has the characteristics of speed regulation, no impact in large-torque starting, adjustable power factor and the like. The heavy-load variable-frequency driving device has a speed-sensor-free vector control function, a inching control function and a low-frequency voltage boosting function.

Claims (3)

1. The utility model provides a single bearing permanent magnetism direct drive motor system for selection powder machine which characterized in that: the motor is vertically arranged right above the center of the powder concentrator (3), and a main shaft (11) of the motor and a main body shaft (6) of the powder concentrator are concentric shafts; a non-shaft extension end cover (12) at the top end of the motor is provided with a motor single bearing (13), a shaft extension end cover (10) at the bottom end of the motor is not provided with a bearing, and the permanent magnet direct drive motor is of a single bearing structure; a discharge port (39) of the powder concentrator (3) is provided with a supporting rib plate (40), the supporting rib plate (40) is provided with a motor mounting base (2), the bottom of the motor mounting base (2) is provided with a bearing (7) at the upper end of the powder concentrator, and a shaft (6) of the powder concentrator body penetrates through the bearing (7) at the upper end of the powder concentrator; the top of the motor mounting base (2) is provided with a motor mounting base upper flange (9), and the motor is vertically mounted on the motor mounting base upper flange (9) through a shaft extension end cover (10); the motor main shaft (11) and the powder concentrator body shaft (6) are connected into a whole in the motor mounting base (2) through an elastic pin coupling (8).

2. The single-bearing permanent magnet direct drive motor system for the powder concentrator as defined in claim 1, wherein: elastic pin shaft coupling (8) are linked together through elastic pin (26) by shaft coupling (30) and last shaft coupling (31) matching down, shaft coupling (30) down are connected to the top of selection powder body axle (6), shaft coupling (31) are connected to the bottom of motor spindle (11), it is equipped with recess (27) to go up shaft coupling (31) terminal surface center, motor spindle (11) bottom is passed through fixing bolt (29) and is fixed plate (28) on the terminal surface, the width of fixed plate (28) is less than the width of recess (27), motor spindle (11) are fixed a position in recess (27) of last shaft coupling (31) through fixed plate (28).

3. The single-bearing permanent magnet direct drive motor system for the powder concentrator according to claim 1 or 2, characterized in that: and a rotor (18) is arranged on the motor spindle (11) and is matched with a stator (19) arranged on the machine base (20).

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