阅读说明：本技术 一种用于移栽机的减振装置及其减振方法 (Vibration damping device for transplanter and vibration damping method thereof ) 是由 *** 于 2020-07-22 设计创作，主要内容包括：本发明公开了一种用于移栽机的减振装置,涉及农用机械技术领域,包括基座,所述基座上安装有振动传感器且固定连接有缓冲筒,所述缓冲筒内底部固定连接有弹簧管,所述弹簧管底部安装有压电片,所述弹簧管内设有空腔,所述空腔内两侧均固定连接有电极沉积膜且内部填充有电流变液,所述弹簧管远离缓冲筒底部一端固定连接有活塞块,所述活塞块内开设有滑动腔,本发明通过控制器匹配基座振动的振动幅度,控制弹簧管内的两个电极沉积膜之间的电场强度,从而控制电流变液在电场下屈服强度的大小,进而控制弹簧管的缓冲能力大小,有效针对相应的振动幅度达到更好的减振效果。(The invention discloses a vibration damper for a transplanter, which relates to the technical field of agricultural machinery and comprises a base, the base is provided with a vibration sensor and is fixedly connected with a buffer cylinder, the bottom in the buffer cylinder is fixedly connected with a spring tube, the bottom of the spring tube is provided with a piezoelectric sheet, a cavity is arranged in the spring tube, two sides in the cavity are fixedly connected with electrode deposition films, and electrorheological fluid is filled in the cavity, the invention controls the electric field intensity between two electrode deposition films in the spring tube by matching the vibration amplitude of the base with the controller, thereby controlling the yield strength of the electrorheological fluid under the electric field, and then the buffer capacity size of control spring pipe, effectively reach better damping effect to corresponding vibration amplitude.)

1. The utility model provides a vibration damper for transplanter, includes base (1), its characterized in that, install vibration sensor (11) and fixedly connected with buffer cylinder (2) on base (1), bottom fixedly connected with spring pipe (3) in buffer cylinder (2), piezoelectric plate (21) are installed to spring pipe (3) bottom, be equipped with cavity (31) in spring pipe (3), equal fixedly connected with electrode deposition membrane (32) of both sides and inside packing have the electrorheological fluid in cavity (31), spring pipe (3) are kept away from buffer cylinder (2) bottom one end fixedly connected with piston block (4), sliding chamber (41) have been seted up in piston block (4), both ends all sliding connection has electro-magnet (42) in sliding chamber (41), two electro-magnet (42) are kept away from sliding chamber (41) center one end and are all leaned on and have friction disc (43), the two friction plates (43) are fixedly connected to the periphery of the piston block (4);

spring pipe (3) one side coaxial fixedly connected with piston rod (5) are kept away from in piston piece (4), spacing hole (22) have been seted up at buffer cylinder (2) top, piston piece (4) one end is kept away from in piston rod (5) and is passed spacing hole (22) and fixedly connected with footstock (6), install controller (7) on base (1), controller (7) and vibration sensor (11), piezoelectric patches (21), electrode deposition membrane (32) and electro-magnet (42) electric connection.

2. The vibration damping device for the transplanter according to claim 1, wherein an air inlet valve (23) and an air outlet valve (24) are mounted on the top and the bottom of each side of the buffer cylinder (2), a filter screen (231) is fixedly connected in the air inlet valve (23), the air inlet valve (23) is communicated into the buffer cylinder (2) from the outside in a one-way mode, and the air outlet valve (24) is opposite to the air inlet valve.

3. Vibration damping device for a transplanter according to claim 1, wherein the vibration sensor (11) adopts the prior art, and obtains vibration frequency and vibration amplitude data of the base (1) and converts the data into electric signals.

4. A vibration damping device for a transplanter according to claim 3, wherein the controller (7) receives electric signals from the vibration sensor (11) and the piezoelectric sheet (21), and controls the operation of the electrodeposited film (32) and the electromagnet (42).

5. A vibration damping method for a vibration damping device of a transplanter is characterized by comprising the following steps:

s1, the vibration sensor (11) acquires vibration frequency and vibration amplitude data of the base (1);

s2, a controller (7) receives an electric signal of a vibration sensor (11) in real time, pulse current with the current intensity being in direct proportion to the vibration amplitude and the pulse frequency being equal to the vibration frequency is applied to the two electrode deposition films (32), the yield strength of the electrorheological fluid is increased under the action of an electric field formed by the two electrode deposition films (32), so that the buffer capacity of the spring tube (3) is improved, the electrorheological fluid loses an external electric field at a pulse gap and recovers, the resilience of the electrorheological fluid is avoided, the vibration amplitude is reduced in real time through electric control, and the purpose of vibration reduction is achieved;

s3, when the long-time work of electrorheological fluid became invalid, the piezoelectric plate (21) detected that the work of spring pipe (3) is unusual and sent electric signal to controller (7), controller (7) let in the electric current that opposite direction intensity is directly proportional to vibration range to two electro-magnet (42) immediately, two electro-magnet (42) mutual magnetic repulsion, thereby improve the normal pressure of friction disc (43) and buffer tube (2) inside wall, and then improve the frictional force of friction disc (43) and buffer tube (2) inside wall, supplementary damping, controller (7) control warning light lights simultaneously, remind to change electrorheological fluid.

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a vibration damping device for a transplanter and a vibration damping method thereof.

Background

With the development of agricultural mechanization, the planting and harvesting of crops gradually start to work by adopting agricultural machinery, a transplanter is generally adopted for planting when the crops are planted, the existing transplanter generally adopts a semi-automatic mode, namely, seedlings are manually sorted and put into the transplanter, and the transplanter performs the operations of ditching, punching, seedling and filling soil. The existing transplanter inevitably generates mechanical vibration in the working process, the mechanical vibration comes from the normal vibration of the work of an engine and a driving machine, the mutual vibration between the mechanical connection and the vibration caused by the concave-convex ground, the service life of mechanical parts is greatly influenced along with the continuous generation of the vibration, and the working efficiency is not only influenced but also the health damage is brought to the working personnel when the working personnel are in the vibration working environment.

Disclosure of Invention

The invention provides a vibration damping device and a vibration damping method for a transplanter, and aims to solve the problems that mechanical vibration is inevitably generated in the working process of the transplanter in the traditional technology, the service life of mechanical parts is greatly influenced, and workers are in a vibration working environment, so that the working efficiency is influenced and health damage is brought to the workers.

In order to achieve the purpose, the invention adopts the following technical scheme:

a vibration damper for a transplanter comprises a base, wherein a vibration sensor is mounted on the base and is fixedly connected with a buffer cylinder, the bottom in the buffer cylinder is fixedly connected with a spring tube, the bottom of the spring tube is provided with a piezoelectric sheet, a cavity is arranged in the spring tube, electrode deposition films are fixedly connected to two sides in the cavity, electrorheological fluid is filled in the cavity, one end, away from the bottom of the buffer cylinder, of the spring tube is fixedly connected with a piston block, a sliding cavity is formed in the piston block, two ends in the sliding cavity are both connected with electromagnets in a sliding mode, one ends, away from the center of the sliding cavity, of the two electromagnets are both abutted against friction sheets, and the two friction sheets are both fixedly connected to;

the coaxial fixedly connected with piston rod in spring pipe one side is kept away from to the piston piece, spacing hole has been seted up at the buffer cylinder top, the piston rod is kept away from piston piece one end and is passed spacing hole and fixedly connected with footstock, install the controller on the base, controller and vibration sensor, piezoelectric patches, electrode deposition membrane and electro-magnet electric connection.

Preferably, all install admission valve and air outlet valve on buffer cylinder both sides top and the bottom, fixedly connected with filter screen in the admission valve, wherein the admission valve is by external one-way conduction in to the buffer cylinder, and the air outlet valve is opposite with it.

Preferably, the vibration sensor adopts the prior art, and obtains the vibration frequency and vibration amplitude data of the base and converts the data into the electric signals.

Preferably, the controller receives electric signals of the vibration sensor and the piezoelectric sheet, and controls the operation states of the electrodeposited film and the electromagnet.

A vibration damping method for a vibration damping device of a transplanter comprises the following steps:

s1, the vibration sensor acquires vibration frequency and vibration amplitude data of the base;

s2, the controller receives the electric signal of the vibration sensor in real time, and applies pulse current with current intensity being in direct proportion to vibration amplitude and pulse frequency being equal to vibration frequency to the two electrode deposition films, the yield strength of the electrorheological fluid is increased under the action of the electric field formed by the two electrode deposition films, so that the buffer capacity of the spring tube is improved, the electrorheological fluid loses the external electric field at the pulse gap and recovers, so that the resilience of the electrorheological fluid is avoided, and the vibration amplitude is reduced in real time through electric control, so that the purpose of vibration reduction is achieved;

s3, when the electrorheological fluid works and fails for a long time, the piezoelectric sheet detects that the spring tube works abnormally and sends an electric signal to the controller, the controller immediately leads in current with opposite directions and strength in direct proportion to the vibration amplitude to the two electromagnets, and the two electromagnets repel each other magnetically, so that the positive pressure of the friction sheet and the inner side wall of the buffer cylinder is improved, the friction force of the friction sheet and the inner side wall of the buffer cylinder is further improved, vibration reduction is assisted, and meanwhile, the controller controls the warning lamp to light up to remind of replacing the electrorheological fluid.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the controller is matched with the vibration amplitude of the vibration of the base, and the electric field intensity between the two electrode deposition films in the spring tube is controlled, so that the yield strength of the electrorheological fluid under an electric field is controlled, the buffering capacity of the spring tube is further controlled, and a better vibration reduction effect is effectively achieved aiming at the corresponding vibration amplitude;

meanwhile, the controller is matched with the vibration frequency of the vibration of the base, the pulse excitation frequency of the electric field intensity between the two electrode deposition films in the spring tube is controlled, and the electrorheological fluid loses an external electric field and recovers to the original state in the pulse gap, so that the elastic force accumulated in the pulse working process is eliminated, the vibration amplitude is reduced, and the vibration reduction effect is improved.

2. When the electrorheological fluid fails in long-time work, the controller receives an electric signal of the piezoelectric sheet, controls the two electromagnets to repel each other magnetically, improves the positive pressure between the friction sheet and the inner side wall of the buffer cylinder, improves the friction force between the friction sheet and the inner side wall of the buffer cylinder, assists in vibration reduction, controls the warning lamp to light up to remind of replacing the electrorheological fluid, and avoids the influence on normal vibration reduction effect caused by abnormal work due to the failure of the electrorheological fluid.

3. According to the invention, the air inlet valve and the air outlet valve are respectively arranged above and below the buffer cylinder, when electrorheological fluid in the buffer cylinder changes and friction between the friction plate and the inner side wall of the buffer cylinder generates heat, the piston block moves up and down in the buffer cylinder along with the piston block, and the piston block pushes hot air in the buffer cylinder to exchange with external cold air, so that a heat dissipation effect is formed, and more heat accumulation in the buffer cylinder is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of portion A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a cross-sectional schematic view of the spring tube of the present invention;

fig. 4 is a schematic diagram of the working block diagram of the present invention.

In the figure: the device comprises a base 1, a vibration sensor 11, a buffer cylinder 2, a piezoelectric plate 21, a limiting hole 22, an air inlet valve 23, a filter screen 231, an air outlet valve 24, a spring tube 3, a cavity 31, an electrode deposition film 32, a piston block 4, a sliding cavity 41, an electromagnet 42, a friction plate 43, a piston rod 5, a top seat 6 and a controller 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a vibration damping device for a transplanter comprises a base 1, wherein a vibration sensor 11 is mounted on the base 1, and the vibration sensor 11 acquires vibration frequency and vibration amplitude data of the base 1 and converts the data into an electric signal by adopting the prior art.

Fixedly connected with buffer cylinder 2 on the base 1, bottom fixedly connected with spring pipe 3 in the buffer cylinder 2, piezoelectric patches 21 are installed to spring pipe 3 bottom, and piezoelectric patches 21 acquire the pressure data of spring pipe 3.

The spring tube 3 is internally provided with a cavity 31, both sides in the cavity 31 are fixedly connected with electrode deposition films 32, and the interior of the cavity 31 is filled with electrorheological fluid, the electrorheological fluid is complex fluid formed by mixing dielectric particles and insulating liquid, the electrorheological fluid is changed from liquid state to solid state under the action of an electric field with certain intensity, and the yield strength of the electrorheological fluid gradually rises along with the increase of the electric field intensity.

Spring tube 3 keeps away from buffer cylinder 2 bottom one end fixedly connected with piston block 4, has seted up sliding chamber 41 in the piston block 4, and the equal sliding connection in both ends has electro-magnet 42 in sliding chamber 41, and two electro-magnets 42 keep away from sliding chamber 41 center one end and all lean on by friction disc 43, and the equal fixed connection of two friction discs 43 is in piston block 4 week side, and when two electro-magnets 42 repelled each other, extrusion friction disc 43 made its and buffer cylinder 2 inside wall contact each other.

Piston block 4 keeps away from 3 coaxial fixedly connected with piston rod 5 in one side of spring tube, and spacing hole 22 has been seted up at 2 tops of buffer cylinder, and piston rod 5 keeps away from 4 one ends of piston block and passes spacing hole 22 and fixedly connected with footstock 6, and the influence of the vibration that spring tube 3 cushion base 1 produced is to footstock 6.

All install admission valve 23 and air outlet valve 24 on 2 both sides tops of buffer cylinder and the bottom, fixedly connected with filter screen 231 in the admission valve 23 avoids external dust to get into in the buffer cylinder 2, and wherein admission valve 23 is one-way switched on in to the buffer cylinder 2 by the external world, and air outlet valve 24 is opposite with it, when reciprocating in the buffer cylinder 2 is followed to piston block 4, promotes the air in the buffer cylinder 2 and exchanges with the outside air.

The controller 7 is mounted on the base 1, the controller 7 is electrically connected with the vibration sensor 11, the piezoelectric sheet 21, the electrode deposition film 32 and the electromagnet 42, and the controller 7 receives electric signals of the vibration sensor 11 and the piezoelectric sheet 21 and controls the working states of the electrode deposition film 32 and the electromagnet 42.

A vibration damping method for a vibration damping device of a transplanter comprises the following steps:

s1, the vibration sensor 11 acquires vibration frequency and vibration amplitude data of the base 1;

s2, the controller 7 receives the electric signal of the vibration sensor 11 in real time, and applies pulse current with the current intensity being in direct proportion to the vibration amplitude and the pulse frequency being equal to the vibration frequency to the two electrode deposition films 32, the yield strength of the electrorheological fluid is increased under the action of the electric field formed by the two electrode deposition films 32, so that the buffer capacity of the spring tube 3 is improved, the electrorheological fluid loses an external electric field at the pulse gap and recovers, so that the resilience of the electrorheological fluid is avoided, the vibration amplitude is reduced in real time through electric control, and the purpose of vibration reduction is achieved;

s3, when the electrorheological fluid works for a long time and fails, the piezoelectric plate 21 detects that the spring tube 3 works abnormally and sends an electric signal to the controller 7, the controller 7 immediately leads current with opposite direction and strength in proportion to the vibration amplitude to the two electromagnets 42, the two electromagnets 42 repel each other magnetically, so that the positive pressure of the friction plate 43 and the inner side wall of the buffer cylinder 2 is improved, the friction force between the friction plate 43 and the inner side wall of the buffer cylinder 2 is further improved, vibration reduction is assisted, meanwhile, the controller 7 controls the warning lamp to light, replacement of the electrorheological fluid is reminded, and the warning lamp is not shown in the drawing.

The principles of the present invention are now described as follows:

firstly, when the base 1 vibrates, the vibration sensor 11 on the base 1 acquires vibration frequency and vibration amplitude data of the base 1, the controller 7 receives the data of the vibration sensor 11 in real time, and applies current with current intensity being in direct proportion to the vibration amplitude to the two electrode deposition films 32 in the spring tube 3 fixedly connected in the buffer cylinder 2, and the yield strength of electrorheological fluid is increased under the action of an electric field formed by the two electrode deposition films 32, so that the buffer capacity of the spring tube 3 is improved, and a better vibration damping effect is effectively achieved aiming at the vibration amplitude of the corresponding base 1;

meanwhile, the controller 7 controls the pulse frequency of the current of the two electrode deposition films 32 to be equal to the vibration frequency of the base 1, and when the pulse gap exists, the electrorheological fluid in the spring tube 3 loses an external electric field formed by the two electrode deposition films 32 and restores to the original state, so that the accumulated elasticity of the electrorheological fluid during pulse work is eliminated, the vibration amplitude is reduced, and the vibration reduction effect is improved;

the vibration amplitude is reduced in real time by the electric control of the controller 7 in cooperation with the change of the electrorheological fluid, so that the aim of damping the top seat 6 fixedly connected with the top of the spring tube 3 through the piston block 4 and the piston rod 5 is fulfilled;

when the electrorheological fluid fails in long-time work, the piezoelectric sheet 21 detects that the spring tube 3 works abnormally and sends an electric signal to the controller 7, the controller 7 instantly leads current with opposite direction and strength in proportion to the vibration amplitude to the two electromagnets 42 connected in the piston block 4 in a sliding way, the two electromagnets 42 repel each other magnetically, the electromagnets 42 extrude the friction sheet 43 in contact with the electromagnets, so that the positive pressure between the friction sheet 43 and the inner side wall of the buffer cylinder 2 is improved, the friction force between the friction sheet 43 and the inner side wall of the buffer cylinder 2 is further improved, when the spring tube 3 contracts or recovers, the piston block 4 slides up and down along the inner side wall of the buffer cylinder 2 to generate friction resistance, vibration reduction is assisted, and the normal vibration reduction effect is prevented from being influenced; meanwhile, the controller 7 controls the warning lamp to light up to remind the electrorheological fluid to be replaced;

when the electrorheological fluid changes in the buffer cylinder 2 and the friction between the friction plate 43 and the inner side wall of the buffer cylinder 2 generates heat, the piston block 4 moves up and down in the buffer cylinder 2 along with the piston block 4, the piston block 4 pushes hot air in the buffer cylinder 2 to exchange with external cold air, a heat dissipation effect is formed, and more heat accumulation in the buffer cylinder is avoided.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.