Three-phase frequency conversion fan driver

Abstract

The utility model discloses a three-phase variable-frequency fan driver, which relates to the technical field of variable-frequency fans and comprises a driving seat, a brushless motor and a frequency converter are fixedly mounted in a first mounting frame and a second mounting frame respectively, and one end of the brushless motor is fixedly connected with an output shaft penetrating to the outside of a through hole. The outer surface of one side of the output shaft is fixedly sleeved with a signal wheel, a magnetoelectric rotating speed sensor for sensing and monitoring the rotating speed of the signal wheel is fixedly installed on the upper surface of the fixing frame, a wear-resisting sleeve is plugged in the through hole, the outer side surface, attached to the driving base, of the wear-resisting sleeve is fixedly connected with an outer sleeve plate, and the inner side surface, attached to the driving base, of the wear-resisting sleeve is fixedly connected with an inner sleeve plate. And a protective shell is installed on the driving base in a sliding covering mode, a controller is fixedly installed on the upper surface of the frequency converter, a display screen, a start button, a stop button and a speed regulation knob are installed on the upper surface of the controller, and the effect of improving protection and monitoring of the output shaft of the brushless motor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of variable frequency fans, in particular to a three-phase variable frequency fan driver. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fan is China's customary abbreviation for gas compression and gas delivery machinery. The fans usually mentioned include ventilators, blowers, and wind turbines. Fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc. A three-phase variable frequency fan is a variable frequency fan that uses three-phase electricity. The drive control component of the fan is the driver.

[0003] At present, the drivers of three-phase variable frequency fans mainly include brushless motors and frequency converters. However, some existing brushless motors and frequency converters do not have protective structures on the outside, which easily leads to dust falling on the drivers. In order to achieve dust prevention effects, some drivers will install protective mechanisms on the outside of the brushless motors and frequency converters, so that the output shaft of the brushless motor needs to rotate through the inside of the protective mechanism, and long-term wear and tear of the protective mechanism will also cause aging and wear of the output shaft. When the brushless motor is driven by the frequency converter, the output shaft speed is not monitored and reflected. In the long run, it is impossible to monitor the output shaft in time to see if it is at the same operating speed as the frequency converter adjustment, thereby reducing the protection and monitoring effect of the output shaft of the brushless motor. Utility Model Content

[0004] The purpose of the utility model is to provide a three-phase variable frequency fan driver, which solves the technical problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-phase variable frequency fan driver, comprising a driving seat, a fixing frame, a first mounting frame and a second mounting frame are fixedly installed on the inner bottom surface of the driving seat in sequence, a brushless motor and a frequency converter are fixedly installed inside the first mounting frame and the second mounting frame respectively, a through hole is opened on one side surface of the driving seat, one end of the brushless motor is fixedly connected to an output shaft that penetrates to the outside of the through hole, a signal wheel is fixedly sleeved on the outer surface of one side of the output shaft, a magnetoelectric speed sensor for inductively monitoring the speed of the signal wheel is fixedly installed on the upper surface of the fixing frame, a wear-resistant sleeve is provided in the through hole, and the wear-resistant sleeve is sleeved on the outside of the output shaft, the wear-resistant sleeve is fixedly connected to an outer sleeve plate that is attached to the outer surface of the driving seat, the wear-resistant sleeve is fixedly connected to an inner sleeve plate that is attached to the inner surface of the driving seat, and a first bolt is threadedly fixed between the inner sleeve plate and the outer sleeve plate;

[0006] A first three-phase cable is connected between the brushless motor and the inverter, and the other side of the inverter is connected to the outside of the drive seat and is connected to a second three-phase cable;

[0007] A protective shell is installed on the sliding cover of the driving seat, a controller is fixedly installed on the upper surface of the inverter, a display screen, a start button, a stop button and a speed control knob are respectively installed on the upper surface of the controller, and a transparent plate for convenient observation and adjustment is installed at the position of the protective shell located at the controller.

[0008] Optionally, a group of vertical slide grooves are provided on the inner surfaces of both sides of the driving seat, and a group of transverse grooves are provided on the inner bottom surface of the driving seat connected to the vertical slide grooves on the same side, a vertical sliding plate is slidably connected in the vertical slide groove, a sealing strip is plugged in the transverse groove, the vertical sliding plate and the sealing strip are symmetrically distributed in two groups, and the vertical sliding plate and the sealing strip on the same side are fixedly connected to the surface of the protective shell.

[0009] Optionally, an arc-shaped cover plate is fixedly connected to the upper surface of the vertical sliding plate, and the arc-shaped cover plate sealing cover is arranged on the upper arc surfaces of the protective shell and the driving seat.

[0010] Optionally, a through hole is formed through the surface of the transparent plate for the start button, the stop button and the speed control knob to pass through.

[0011] Optionally, the symmetrical surface of the protective shell and the lower surface of the driving seat are both provided with heat dissipation slots.

[0012] Optionally, a group of symmetrical support seats are fixedly connected to both side surfaces of the driving seat, and the support seats protrude from the lower surface of the driving seat, and the upper surface of the support seats is in contact with a connecting groove plate, and the connecting groove plate is fixedly connected to the symmetrical surface of the protective shell, and a second bolt is threadedly fixed between the connecting groove plate and the support seat.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model uses a wear-resistant sleeve sleeved on the outside of the output shaft, so that the operator can sleeve the inner sleeve plate on the outside of the output shaft in advance, then pass the output shaft to the outside of the through hole, and install the brushless motor in the first mounting frame. Subsequently, the wear-resistant sleeve is inserted into the through hole, and the inner surface of the wear-resistant sleeve is sleeved with the outside of the output shaft until the wear-resistant sleeve drives the outer sleeve plate to fit the outer surface of the driving seat, and then the sliding inner sleeve plate is fitted with the inner surface of the driving seat, and the outer sleeve plate and the inner sleeve plate are threadedly fixed by the first bolt, so as to achieve the purpose of wear prevention during the rotation of the output shaft of the brushless motor, and the operation is simple, which is convenient for the operator to replace, prolonging the service life of the internal components of the driver, and providing a protective effect for the output shaft of the brushless motor.

[0015] 2. The utility model utilizes a magnetoelectric speed sensor on a fixed frame to monitor the rotational speed of a signal wheel. When the frequency converter drives the output shaft of the brushless motor through the first three-phase cable, the output shaft synchronously drives the signal wheel to rotate, and the magnetoelectric speed sensor on the fixed frame can sense the rotational speed of the signal wheel in real time, and transmit the rotational speed data back to the frequency converter for speed verification, thereby avoiding the phenomenon that the output shaft and the rotational speed set by the frequency converter controller are different and timely monitoring is not performed, thereby improving the monitoring effect of the drive operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure inside the drive seat of the utility model;

[0018] Figure 3 It is an enlarged schematic diagram of the structure of the protective shell in the utility model;

[0019] Figure 4 It is a front cross-sectional view of the structure of the utility model;

[0020] Figure 5 For this utility model Figure 4 A magnified schematic diagram of center A.

[0021] In the figure: 1-driving seat, 2-first mounting frame, 3-second mounting frame, 4-brushless motor, 5-output shaft, 6-wear-resistant sleeve, 7-through hole, 8-outer plate, 9-inner plate, 10-first bolt, 11-inverter, 12-controller, 13-display screen, 14-start button, 15-stop button, 16-speed knob, 17-lateral groove, 18-vertical slide groove, 19-sealing strip, 20-vertical slide plate, 21-arc cover plate, 22-protective shell, 23-transparent plate, 24-first three-phase cable, 25-second three-phase cable, 26-fixed frame, 27-magnetoelectric speed sensor, 28-heat dissipation notch, 29-support seat, 30-connecting slot plate, 31-second bolt, 32-signal wheel. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] For examples, see Figures 1 to 5 The utility model provides a three-phase variable frequency fan driver, including a driving seat 1, the inner bottom surface of the driving seat 1 is fixedly mounted with a fixing frame 26, a first mounting frame 2 and a second mounting frame 3 in sequence, the first mounting frame 2 and the second mounting frame 3 are respectively fixedly mounted with a brushless motor 4 and a frequency converter 11, a through hole 7 is opened on one side surface of the driving seat 1, one end of the brushless motor 4 is fixedly connected with an output shaft 5 that penetrates to the outside of the through hole 7, a signal wheel 32 is fixedly sleeved on the outer surface of one side of the output shaft 5, a magnetoelectric speed sensor 27 for sensing and monitoring the speed of the signal wheel 32 is fixedly mounted on the upper surface of the fixing frame 26, a wear-resistant sleeve 6 is plugged in the through hole 7, and the wear-resistant sleeve 6 is sleeved on the outside of the output shaft 5, the wear-resistant sleeve 6 is fixedly connected with an outer sleeve plate 8 on the outer surface of the driving seat 1, the wear-resistant sleeve 6 is fixedly connected with an inner sleeve plate 9 on the inner surface of the driving seat 1, and a first bolt 10 is threadedly fixed between the inner sleeve plate 9 and the outer sleeve plate 8;

[0024] A first three-phase cable 24 is connected between the brushless motor 4 and the inverter 11, and the other side of the inverter 11 is connected to the outside of the drive seat 1 and is connected to a second three-phase cable 25;

[0025] A protective shell 22 is installed on the sliding cover of the driving seat 1, and a controller 12 is fixedly installed on the upper surface of the inverter 11. A display screen 13, a start button 14, a stop button 15 and a speed control knob 16 are respectively installed on the upper surface of the controller 12. The protective shell 22 is located at the position of the controller 12 and a transparent plate 23 for convenient observation and adjustment is installed. The surface of the transparent plate 23 is penetrated by a through hole for the start button 14, the stop button 15 and the speed control knob 16 to pass through.

[0026] In this embodiment, the operator can sleeve the inner sleeve 9 on the outside of the output shaft 5 in advance, then pass the output shaft 5 through the outside of the through hole 7, and install the brushless motor 4 in the first mounting frame 2. Subsequently, the wear-resistant sleeve 6 is inserted into the through hole 7, and the inner surface of the wear-resistant sleeve 6 is sleeved with the outside of the output shaft 5 until the wear-resistant sleeve 9 drives the outer sleeve 8 to fit the outer surface of the drive seat 1. Then, the sliding inner sleeve 9 fits the inner surface of the drive seat 1, and the outer sleeve 8 and the inner sleeve 9 are threadedly fixed by the first bolt 10, so as to achieve the purpose of wear prevention during the rotation of the output shaft 5 of the brushless motor 4, and the operation is simple, which is convenient for the operator to replace, prolongs the service life of the internal components of the driver, and provides a protective effect for the output shaft 5 of the brushless motor 4. Subsequently, the inverter 11 is installed inside the second mounting frame 3, the first three-phase cable 24 is connected between the brushless motor 4 and the inverter 11, and the second three-phase cable 25 is connected to the power interface outside the drive seat 1. Finally, the protective shell 22 is covered and installed on the drive seat 1.

[0027] The transparent plate 23 is convenient for displaying the data displayed on the display screen 13, and the operator can control the controller 12 through the start button 14, the stop button 15 or the speed control knob 16. When the start button 14 is pressed, the inverter 11 drives the output shaft 5 of the brushless motor 4 through the first three-phase cable 24, and the output shaft 5 synchronously drives the signal wheel 32 to rotate, and the magnetoelectric speed sensor 27 on the fixed frame 26 can sense the speed of the signal wheel 32 in real time, and transmit the speed data back to the inverter 11 for speed verification, thereby avoiding the phenomenon that the output shaft 5 and the controller 12 of the inverter 11 are set at different speeds and are not monitored in time, thereby improving the monitoring effect of the drive operation.

[0028] Furthermore, a group of vertical slide grooves 18 are provided on the inner surfaces of both sides of the driving seat 1, and a group of horizontal grooves 17 are provided on the inner bottom surface of the driving seat 1 that are connected to the vertical slide grooves 18 on the same side. A vertical slide plate 20 is slidably connected in the vertical slide groove 18, and a sealing strip 19 is plugged in the horizontal groove 17. The vertical slide plate 20 and the sealing strip 19 are symmetrically distributed in two groups, and the vertical slide plate 20 and the sealing strip 19 on the same side are fixedly connected to the surface of the protective shell 22, and the upper surface of the vertical slide plate 20 is fixedly connected to an arc cover plate 21, and the arc cover plate 21 sealing cover is arranged on the upper arc surface of the protective shell 22 and the driving seat 1.

[0029] It is worth noting that the vertical slide plate 20 and the sealing strip 19 of the protective shell 22 can slide in along the vertical slide groove 18 and the horizontal groove 17 of the drive seat 1 respectively until the arc cover plate 21 covers the upper arc surface of the protective shell 22 and the drive seat 1.

[0030] Furthermore, the symmetrical surfaces of the protective shell 22 and the lower surface of the driving seat 1 are provided with heat dissipation grooves 28, and the two side surfaces of the driving seat 1 are fixedly connected with a group of symmetrical support seats 29, and the support seats 29 protrude from the lower surface of the driving seat 1, and the upper surface of the support seat 29 is in contact with a connecting groove plate 30, and the connecting groove plate 30 is fixedly connected to the symmetrical surfaces of the protective shell 22, and a second bolt 31 is threadedly fixed between the connecting groove plate 30 and the support seat 29.

[0031] More specifically, when the arc-shaped cover plate 21 covers the arc surface of the protective shell 22 and the drive seat 1, the connecting slot plate 30 and the support seat 29 will also interfere with each other. The operator can use the second bolt 31 to complete the threaded fixation of the protective shell 22 and the drive seat 1. The heat dissipation slot 28 provides a heat dissipation effect for the protective shell 22 and the drive seat 1, and the support seat 29 protruding from the lower surface of the drive seat 1 also ensures the heat dissipation performance of the heat dissipation slot 28 at the lower surface of the drive seat 1.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase variable frequency fan driver, comprising a drive seat (1), characterized in that: The inner bottom surface of the driving seat (1) is fixedly mounted with a fixing frame (26), a first mounting frame (2) and a second mounting frame (3) in sequence; the first mounting frame (2) and the second mounting frame (3) are respectively fixedly mounted with a brushless motor (4) and a frequency converter (11); a through hole (7) is provided on one side surface of the driving seat (1); one end of the brushless motor (4) is fixedly connected with an output shaft (5) that penetrates the outside of the through hole (7); a signal wheel (32) is fixedly sleeved on one side outer surface of the output shaft (5); the fixing frame ( 26) is fixedly mounted on the upper surface of the drive seat (1), and a magnetoelectric speed sensor (27) for sensing and monitoring the speed of the signal wheel (32) is installed; a wear-resistant sleeve (6) is provided inside the through hole (7), and the wear-resistant sleeve (6) is sleeved on the outside of the output shaft (5); the wear-resistant sleeve (6) is attached to the outer surface of the drive seat (1) and is fixedly connected to an outer sleeve plate (8); the wear-resistant sleeve (6) is attached to the inner surface of the drive seat (1) and is fixedly connected to an inner sleeve plate (9); and a first bolt (10) is threadedly fixed between the inner sleeve plate (9) and the outer sleeve plate (8); A first three-phase cable (24) is connected between the brushless motor (4) and the frequency converter (11), and the other side of the frequency converter (11) is connected to the outside of the drive seat (1) and is connected to a second three-phase cable (25); The upper sliding cover of the drive seat (1) is provided with a protective shell (22), the upper surface of the frequency converter (11) is fixedly provided with a controller (12), the upper surface of the controller (12) is respectively provided with a display screen (13), a start button (14), a stop button (15) and a speed adjustment knob (16), and the protective shell (22) is provided with a transparent plate (23) for convenient observation and adjustment at a position of the controller (12).

2. A three-phase variable frequency fan driver according to claim 1, characterized in that: A group of vertical slide grooves (18) are provided on the inner surfaces of both sides of the driving seat (1); a group of transverse grooves (17) are provided on the inner bottom surface of the driving seat (1) and are connected to the vertical slide grooves (18) on the same side; a vertical slide plate (20) is slidably connected in the vertical slide groove (18); a sealing strip (19) is plugged in the transverse groove (17); the vertical slide plate (20) and the sealing strip (19) are symmetrically distributed in two groups, and the vertical slide plate (20) and the sealing strip (19) on the same side are fixedly connected to the surface of the protective shell (22).

3. A three-phase variable frequency fan driver according to claim 2, characterized in that: The upper surface of the vertical sliding plate (20) is fixedly connected with an arc-shaped cover plate (21), and the arc-shaped cover plate (21) is sealed and arranged on the upper arc surfaces of the protective shell (22) and the driving seat (1).

4. A three-phase variable frequency fan driver according to claim 1, characterized in that: The surface of the transparent plate (23) is penetrated with through holes for the start button (14), the stop button (15) and the speed regulating knob (16) to pass through.

5. A three-phase variable frequency fan driver according to claim 1, characterized in that: The symmetrical surface of the protective shell (22) and the lower surface of the driving seat (1) are both provided with heat dissipation slots (28).

6. A three-phase variable frequency fan driver according to claim 5, characterized in that: A group of symmetrical support seats (29) are fixedly connected to both side surfaces of the drive seat (1), and the support seats (29) protrude from the lower surface of the drive seat (1). The upper surface of the support seat (29) abuts against a connecting groove plate (30), and the connecting groove plate (30) is fixedly connected to the symmetrical surface of the protective shell (22). A second bolt (31) is threadedly fixed between the connecting groove plate (30) and the support seat (29).

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