Reversing fan capable of sensing angle adjustment

Abstract

The utility model discloses a reversing fan capable of perceiving angle adjustment. The problem that in the prior art, the fan blade adjustment angle of a reversing fan is not directly perceived is solved. The reversing fan comprises a front shell, a rear shell, a piston, fan blades and a rotary joint, and is characterized in that a distance sensing module is mounted on the rear shell, a strong magnetic block is mounted on the piston opposite to the distance sensing module, and the strong magnetic block generates an effective magnetic field for a linear Hall sensor in the distance sensing module. A sensing module with a linear Hall sensor as a core is arranged on a shell of the reversing fan, a strong magnetic block is arranged on a piston, the angle adjusting numerical value of fan blades is obtained by sensing the moving distance of the piston and calculating, precise control over the angles of the fan blades is achieved, and the sensing of the angle numerical value can reach the level of 0.1 degree.

Description

TECHNICAL FIELD

[0001] The utility model relates to the automatic control technical field of commutating fan blade angle. BACKGROUND

[0002] In the prior art, a variable-pitch fan has been widely used in cotton picking machines, harvesters and other agricultural machinery. The blade angle of the fan is adjustable. Taking a hydraulic commutating fan as an example, the hydraulic solenoid valve of the variable-angle hydraulic fan is controlled during adjustment, that is, the oil supply of the hydraulic oil is controlled and converted into the stroke of the piston, and then the control of the blade piston is realized. This conversion method does not fully consider the leakage of hydraulic oil, environmental temperature and other comprehensive factors, so this method cannot accurately control the stepless variable-angle action of the hydraulic fan.

[0003] The commutating fan with compressed air as the adjustment power cannot accurately control the stepless variable-angle action of the hydraulic fan because the amount of compressed air is more difficult to control.

[0004] In reality, there is an urgent need for a technology that can accurately monitor the change in blade angle of a variable-pitch fan, which meets the use requirements of hydraulic commutating fans or pneumatic commutating fans. UTILITY MODEL CONTENTS

[0005] To solve the problems of the prior art, the utility model provides a commutating fan that accurately controls the stepless variable-angle action of the hydraulic fan, and solves the problem of not directly sensing the adjustment angle of the fan blade of the commutating fan in the prior art.

[0006] The technical solution adopted by the utility model to solve the technical problems is:

[0007] The commutating fan that can sense the angle adjustment comprises a front shell, a rear shell, a piston, a fan blade and a rotary joint, characterized in that a distance sensing module is installed on the rear shell, and a strong magnetic block is installed on the piston opposite to the distance sensing module, and the strong magnetic block generates an effective magnetic field for the linear Hall sensor in the distance sensing module.

[0008] Further, the distance sensing module comprises a packaging body, a linear Hall sensor, a single-chip microcomputer, a Bluetooth module and a replaceable power supply module, wherein the linear Hall sensor, the Bluetooth module, the single-chip microcomputer and the power supply module are electrically connected and effectively packaged in the packaging body, and the Bluetooth module is wirelessly connected to the main machine of the commutating fan.

[0009] The application discloses a reversible fan with angle adjustment sensing, which comprises a front shell, a rear shell, a piston, a fan blade and a rotary joint, wherein a distance sensing module is installed on the rotary joint, and a strong magnetic block is installed on the piston opposite to the distance sensing module, and the strong magnetic block generates an effective magnetic field for a linear Hall sensor in the distance sensing module.

[0010] Further, the strong magnetic block is installed on the piston close to one side of the inner wall of the front shell, and the strong magnetic block is at least two and is evenly distributed along the rotation axis in the circumferential direction.

[0011] Further, the strong magnetic block is installed on the piston close to one side of the inner wall of the front shell, and the strong magnetic block is at least two and is evenly distributed along the rotation axis in the circumferential direction.

[0012] Further, the distance sensing module comprises a package body, a linear Hall sensor, a single-chip microcomputer and a cable, wherein the linear Hall sensor and the single-chip microcomputer are electrically connected and effectively packaged in the package body, and the linear Hall sensor and the single-chip microcomputer are connected to a main machine of the reversible fan through the cable.

[0013] The application has the following beneficial effects:

[0014] The application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the embodiment one.

[0016] Figure 2 It is a sectional view of the embodiment one. Figure 1

[0017] Figure 3 It is a front view of the embodiment one. Figure 1

[0018] Figure 4 It is a perspective view of the embodiment two.

[0019] Figure 5 It is a sectional view of the embodiment two. Figure 4

[0020] Figure 6 It is a front view of the embodiment two. Figure 4

[0021] Figure 7 It is a circuit diagram of the embodiment one.

[0022] ​​​​Figure 8 Circuit diagram for example two.

[0023] In the figure:

[0024] 10 front shell, 20 rear shell, 30 piston, 40 spring, 50 fan shaft, 60 fan blade, 70 rotary joint assembly, 80 distance sensing module, 90 strong magnetic block. DETAILED DESCRIPTION

[0025] A reversing fan for precise adjustment of the angle of the fan blade using linear Hall sensor technology, the reversing fan comprises a front shell 10, a rear shell 20, a piston 30, a spring 40, a fan shaft 50, a fan blade 60, a rotary joint assembly 70, etc., and the angle adjustment of the reversing fan is driven by the hydraulic oil or compressed air supplied by the rotary joint. In Figures 1 to 3 For example, the shell of the reversing fan is composed of a front shell and a rear shell and fasteners, the front shell and the rear shell are preferably made of aluminum alloy pressure casting, a semicircular arc through slot is arranged at the mating surface of the front shell and the rear shell, and after the front shell and the rear shell are butted and fitted, the two semicircular arc through slots are matched to form a shaft hole for installing the fan shaft. After the front shell and the rear shell are butted and fitted, the fan shaft is rotatably installed at the shaft hole, the inner side of the fan shaft is movably fitted with the piston of the fan through an eccentric pin shaft, and the outer side of the fan shaft is fixed with the fan blade. The piston 30 is installed in the cavity inside the shell through the spring, and a pneumatic or hydraulic rotary joint is mechanically assembled on the front shell for connecting the power source, and the piston 30 is driven to move towards the direction of spring compression through pneumatic or hydraulic drive, and in the process, the piston 30 drives the fan blade to adjust the angle. The above structures belong to the basic structural composition and action process of the existing reversing fan, and will not be described in detail.

[0026] The innovation of the present technology is to use linear Hall sensor technology to accurately obtain the rotation angle of the fan blade by sensing and measuring the straight-line sliding distance of the piston and through formula conversion. The implementation of the present technology will be described in combination with two specific examples.

[0027] Example one

[0028] Reference Figures 1 to 3 This example discloses an implementation. Specifically, the technical improvement in this example is to open an installation window on the rear side of the rear shell 20, fix a distance sensing module 80 at the installation window, and install a strong magnetic block 90 on the piston corresponding to the installation window, which generates an effective magnetic field for the linear Hall sensor in the distance sensing module.

[0029] The distance sensing module 80 in the embodiment is as follows: a package, a linear Hall sensor, a single-chip microcomputer, a Bluetooth module, and a replaceable power supply module, wherein the linear Hall sensor, the Bluetooth module, the single-chip microcomputer, and the power supply module are connected and effectively packaged in the package. The package is fixed in the mounting window position of the rear shell by means of screws and sealing glue. After installation, the linear Hall sensor in the package senses the magnetic field strength of the strong magnetic block on the piston. The single-chip microcomputer converts and calculates the linear Hall sensor to obtain the displacement distance of the piston and the angle change value of the fan blade. The Bluetooth module transmits the angle value of the fan blade to the control host of the fan.

[0030] In the diagram of the embodiment, only the outline of the distance sensing module 80 is exemplarily expressed, and the structure and composition thereof are not limited. The specific circuit connection diagram can be referred to Figure 7 .

[0031] In the embodiment, since the rear shell 20 and the piston 30 are relatively synchronized in the rotation direction and are both in a high-speed rotation state, a wireless Bluetooth transmission technology, i.e., a wireless transmission technology, is adopted in the embodiment.

[0032] Referring to Figure 7 a specific circuit diagram, the wireless transmission mode is as follows: a battery is used for power supply. After passing through a diode (anti-reverse connection), the ASM1117-5.0 supplies power to the single-chip microcomputer (STC15W408AS) and the linear Hall sensor (HAL_835PUT). Then, the 5V power supply is converted into 3.3V by the ASM1117-3.3 to supply power to the ZX-D36 Bluetooth module. After the linear Hall sensor is powered on, the analog quantity is collected through the P1.0 port of the single-chip microcomputer. After conversion by the collected data, the current distance of the piston is converted and then transmitted through the TXD and RXD data transmission ports of the single-chip microcomputer. The converted data is transmitted by the ZX-D36 through Bluetooth.

[0033] The receiving end can use (12-24V) power supply. After passing through a diode (anti-reverse connection), the ASM1117-5.0 supplies power to the single-chip microcomputer (STC15W408AS). Then, the 5V power supply is converted into 3.3V by the ASM1117-3.3 to supply power to the ZX-D36 Bluetooth module. The Bluetooth receiver transmits the received data to the single-chip microcomputer through the serial port. The single-chip microcomputer controls the reversing and homing of the fan through the P1.2 and P1.3 ports, respectively, according to the received data. The P1.4 port of the single-chip microcomputer is the signal decoding port of the remote control receiver.

[0034] The wireless Bluetooth transmission technology in the embodiment, the linear Hall sensor collects the analog quantity of the distance AH between the strong magnetic block and the sensor, converts the data collected, converts the current distance of the piston from the linear Hall sensor, and transmits the data to the control host of the reversing fan. The host receives the above data and converts it again to obtain the current angle value of the fan blade.

[0035] A wireless closed-loop control method based on Bluetooth wireless transmission technology:

[0036] The control end single-chip microcomputer compares the received temperature signal of the engine output or the independent temperature signal with the data received by the Bluetooth receiver, and outputs a scheduling adjustment instruction and an angle adjustment value of the reversing fan. The hydraulic control system controls the supply of hydraulic oil through the electromagnetic valve, thereby driving the linear motion of the piston. The linear motion drives the movement of the strong magnetic block, which changes the data sensed by the linear Hall sensor. The linear Hall sensor converts and feeds back the data to the single-chip microcomputer, and the single-chip microcomputer generates the corresponding fan blade angle and transmits it to the host of the reversing fan through Bluetooth. The host determines whether the angle meets the angle position. If not, it continues to adjust. If the angle is equal to the input adjustment value, the electromagnetic valve of the hydraulic control system is closed, and the adjustment is completed.

[0037] Therefore, by the above method, closed-loop control of the fan blade angle adjustment can be achieved.

[0038] Embodiment two

[0039] Reference Figures 4 to 6 This embodiment is based on the design of wired transmission data and power supply through a cable. Specifically, the distance sensing module 80 in this technology is as follows: a package body, a linear Hall sensor, a single-chip microcomputer, and a cable. The linear Hall sensor and the single-chip microcomputer are connected and effectively packaged in the above-mentioned package body. The package body is fixed at the rotary joint by screwing and sealing glue. After installation, the linear Hall sensor in the package body senses the magnetic field strength of the strong magnetic block 90 on the piston. Correspondingly, the strong magnetic block 90 is installed on the piston near the inner wall of the front shell. To maintain dynamic balance, the strong magnetic block is installed as a ring magnet, or two or more small magnets are uniformly arranged at equal intervals along the circumferential direction of the rotation axis, which are within the scope of protection of the technology. The linear Hall sensor obtains data for the single-chip microcomputer, which converts and calculates the data obtained by the linear Hall sensor to obtain the displacement distance of the piston and the angle change value of the fan blade, and finally transmits the data to the control host of the fan through the cable.

[0040] Further, reference Figure 8A kind of direct power supply through cable line: can use (12-24V) power supply, after diode (anti-reverse connection) After ASM1117-5.0, linear hall sensor (HAL_835PUT) is powered to single-chip microcomputer (STC15W408AS), the P1.5 port of the single-chip microcomputer is directly connected linear hall sensor, the magnetic field intensity in the fan is measured by linear hall sensor to judge the commutation angle of fan, according to the numerical value detected by sensor, the corresponding distance is converted by program, the commutation and homing of fan are controlled by the P1.2 and P1.3 port of single-chip microcomputer, the P1.4 port of single-chip microcomputer is the signal decoding port of remote control receiver, this control reserves 2*4p fast interface to insert display debugging panel (P1.1 is bit movement signal P1.2 is parallel output signal P3.7 is minus key P3.6 is plus key P3.3 is setting selection key P3.2 is bit input).

[0041] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the present application made by those skilled in the art shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A reversible fan with perceptible angle adjustment, comprising a front shell, a rear shell, a piston, a fan blade, a rotary joint, characterized in that: A distance sensing module is installed on the rear shell, and a strong magnetic block is installed on the piston opposite to the distance sensing module, which generates an effective magnetic field for a linear Hall sensor in the distance sensing module.

2. The perceptible angle-adjustable commutated fan of claim 1, wherein, The distance sensing module comprises a package, a linear Hall sensor, a single-chip microcomputer, a Bluetooth module and a power supply module, wherein the linear Hall sensor, the Bluetooth module, the single-chip microcomputer and the power supply module are electrically connected and effectively packaged in the package, and the Bluetooth module is wirelessly connected to the reversing fan host.

3. A reversible fan with perceptible angle adjustment comprising a front housing, a rear housing, a piston, a fan blade, a rotary joint, characterized in that: A distance sensing module is installed on the rear shell, and a strong magnetic block is installed on the piston opposite to the distance sensing module, which generates an effective magnetic field for a linear Hall sensor in the distance sensing module.

4. The perceptible angle-adjustable commutated fan of claim 3, wherein, The strong magnetic block is installed on the piston close to one side of the inner wall of the front shell, and the strong magnetic block is at least two and is evenly distributed along the rotation axis.

5. The perceptible angle-adjustable commutated fan of claim 3, wherein, The strong magnetic block is installed on the piston close to one side of the inner wall of the front shell, and the strong magnetic block is an annular block.

6. The perceptible angle-adjustable commutated fan of claim 3, wherein, The distance sensing module comprises a package, a linear Hall sensor, a single-chip microcomputer and a cable, wherein the linear Hall sensor and the single-chip microcomputer are electrically connected and effectively packaged in the package, and the linear Hall sensor and the single-chip microcomputer are connected to the reversing fan host through the cable.

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