CN111219438B - Automatic radiating disk type magneto-rheological fluid damper - Google Patents

Abstract

The present invention discloses a disc-type magnetorheological damper with automatic heat dissipation, comprising an outer cylinder, an inner cylinder, an upper cover, a lower cover, an inertia ring, a rotating shaft and a cam; there is a gap between the inertia ring and the inner cylinder, which is a magnetorheological damping channel, and there is a magnetorheological fluid in the magnetorheological damping channel; there is a gap between the inner cylinder and the outer cylinder, which is a first heat dissipation channel; through holes are opened on both sides of the outer cylinder, which are the second heat dissipation channel; through holes are opened on the upper cover, which are the third heat dissipation channel; through holes are opened on the lower cover, which are the fourth heat dissipation channel. The present invention has a simple structure, the rotating shaft rotates, the cam drives the upper piston and the lower piston to reciprocate, and the air in the magnetorheological damper is circulated through each heat dissipation channel to achieve air circulation and heat dissipation effect.

Description

Disc-type magnetorheological fluid damper with automatic heat dissipation

Technical Field

The invention relates to a damper, in particular to a disc-type magnetorheological fluid damper with an automatic heat dissipation structure.

Background Art

Magnetorheological dampers have broad market prospects in shock absorption and other aspects. Magnetorheological fluid dampers are widely used in automobile suspensions, etc., because they have the advantages of being adjustable. The principle of shock absorption is to use the controllable and adjustable viscosity of magnetorheological fluid in a magnetic field (that is, magnetorheological fluid can achieve the adjustment change between liquid and semi-solid). In the absence of a magnetic field, the magnetorheological fluid is in a liquid state, and the magnetic particles are arranged in a disordered manner; after adding a magnetic field, the magnetorheological fluid will be in a semi-solid state. Although magnetorheological dampers have the advantages of fast response and controllability, they need to pass current, which will generate heat, and magnetorheological dampers are sealed devices that are not easy to dissipate heat. If a certain heat dissipation is not achieved, it is easy to burn the equipment.

For example, the rotary magnetorheological damper with publication number CN 108843720 A and publication date 2018.11.20 is a rotary magnetorheological damper. This invention controls the length of the magnetorheological fluid damping channel to enable the damper to have a wider range of adjustable damping torque, thereby improving the adaptability of the damper. However, it has multiple coils, and the coils dissipate a lot of heat that cannot be discharged, which can easily burn the equipment.

Summary of the invention

Based on the above problems, the present invention proposes a disc-type magnetorheological fluid damper with automatic heat dissipation. When the magnetorheological damper is working, the heat generated by the internal coil circulates the air in the damper through the movement of the piston, and the heat can be automatically discharged to protect the magnetorheological damper from being burned.

The technical solution adopted by the present invention is as follows:

The disc-type magnetorheological fluid damper with automatic heat dissipation comprises an outer cylinder, an inner cylinder, an upper cover, a lower cover, an inertia ring, a rotating shaft and a cam; the outer cylinder is in a circular shape; the upper cover is installed above the outer cylinder, and the lower cover is installed below the outer cylinder; the inner cylinder is installed inside the outer cylinder; the inertia ring is installed in the inner cylinder, the inertia ring can move in the inner cylinder, and there is a gap between the inertia ring and the inner cylinder, the gap is a magnetorheological damping channel, and there is magnetorheological fluid in the magnetorheological damping channel; the rotating shaft passes through the upper cover, the inner cylinder, the inertia ring and the lower cover in order from top to bottom; a coil is wound around the surface of the inner cylinder;

There is a gap between the inner cylinder body and the outer cylinder body, which is the first heat dissipation channel;

Through holes are opened on both sides of the outer cylinder body, and the through holes serve as the second heat dissipation channels;

The first activity space is between the upper cover and the upper surface of the inner cylinder body; an upper sealing plate is installed in the first activity space, and the upper sealing plate divides the first activity space into four activity areas, and an upper piston is installed in each activity area; the upper piston reciprocates along the upper sealing plates in the activity area; a through hole is opened on the upper cover, and the through hole is a third heat dissipation channel; the third heat dissipation channel is connected to the first activity space; one side of the upper piston is connected to one end of the upper spring, and the other end of the upper spring is fixed to the inner wall of the outer cylinder body; the other side of the upper piston is connected to the cam line; the cam and the rotating shaft are connected by interference fit

The second movable space is between the lower cover and the lower surface of the inner cylinder; a lower sealing plate is installed in the second movable space, and the lower sealing plate divides the second movable space into four movable areas, and a lower piston is installed in each movable area; the lower piston reciprocates along the lower sealing plates in the movable area; a through hole is opened on the lower cover, and the through hole is the fourth heat dissipation channel; the fourth heat dissipation channel is connected to the second movable space; one side of the lower piston is connected to one end of the lower spring, and the other end of the lower spring is fixed on the inner wall of the outer cylinder body; the other side of the lower piston is connected to the cam line; the cam and the rotating shaft are interference connected.

Furthermore, the center points of the through holes on both sides of the outer cylinder body and the center point of the coil are on the same straight line.

Furthermore, the upper sealing plate is L-shaped.

Furthermore, the lower sealing plate is L-shaped.

Furthermore, the upper portion of the upper sealing plate is fixed to the upper cover, and the lower portion of the upper sealing plate is fixed to the upper surface of the inner cylinder body.

Further, the lower portion of the lower sealing plate is fixed to the lower cover, and the upper portion of the lower sealing plate is fixed to the lower surface of the inner cylinder body.

Furthermore, there are four third heat dissipation channels, which are respectively connected to the four activity areas in the first activity space.

Furthermore, there are four fourth heat dissipation channels, which are respectively connected to the four activity areas in the second activity space.

The disc-type magnetorheological damper fluid with automatic heat dissipation of the present invention rotates the rotating shaft, the coil is energized, the inertia ring moves in the inner cylinder body, damping is generated, and the coil also generates a certain amount of heat; when the rotating shaft rotates, the upper piston and the lower piston respectively reciprocate linearly in each active area due to the power transmission of the rotating shaft; when the upper piston and the lower piston move away from the rotating shaft in the radial direction, the third heat dissipation channel and the fourth heat dissipation channel inhale air, the first heat dissipation channel transfers the air in the first active space and the second active space to the coil, and the second heat dissipation channel exhausts air; when the upper piston and the lower piston move close to the rotating shaft in the radial direction, the third heat dissipation channel and the fourth heat dissipation channel exhaust air, the first heat dissipation channel inhales air, and the second heat dissipation channel transfers the air inhaled by the first heat dissipation channel to the first active space and the second active space; the reciprocating motion of the upper piston and the lower piston drives the air circulation of the magnetorheological damper, thereby realizing the heat dissipation in the damper.

The invention has a simple structure, and according to the rotation speed of the rotating shaft, the cam drives the piston to reciprocate, thereby realizing air circulation in the damper and achieving the heat dissipation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a disk-type magnetorheological damper with automatic heat dissipation according to the present invention;

FIG2 is a schematic top view of the structure of the disk-type magnetorheological damper with automatic heat dissipation of the present invention;

FIG3 is a schematic structural diagram of the first active space of the disk-type magnetorheological damper with automatic heat dissipation according to the present invention.

DETAILED DESCRIPTION

The technical solution of the present invention is described in detail below. The embodiments of the present invention are only used to illustrate the specific structure, and the scale of the structure is not limited by the embodiments.

Referring to Fig. 1 to Fig. 3, the disc-type magnetorheological fluid damper with automatic heat dissipation comprises an outer cylinder body 1, an inner cylinder body 2, an upper cover 4, a lower cover 5, an inertia ring 3, a rotating shaft 6 and a cam 7; the outer cylinder body 1 is in a circular shape, and through holes are opened on both sides of the outer cylinder body, and the center points of the through holes are in the same straight line with the center points of the coils 9, and the through holes are the second heat dissipation channels 11; the upper cover 4 is installed above the outer cylinder body 1, and the lower cover 5 is installed below the outer cylinder body 1; the inner cylinder body 2 is installed inside the outer cylinder body 1, and there is a gap between the inner cylinder body 2 and the outer cylinder body 1, which is the first heat dissipation channel 10; the inertia ring 3 is installed in the inner cylinder body 2, the inertia ring 3 can move in the inner cylinder body 2, and there is a gap 8 between the inertia ring 3 and the inner cylinder body 2, and the gap 8 is a magnetorheological damping channel, and there is magnetorheological fluid in the magnetorheological damping channel; the rotating shaft 6 passes through the upper cover 4, the inner cylinder body 2, the inertia ring 3 and the lower cover 5 from top to bottom in sequence; the surface of the inner cylinder body 2 is wound with a coil 9;

The first activity space is between the upper cover 4 and the upper surface of the inner cylinder 2; an upper sealing plate 12 is installed in the first activity space, and the upper sealing plate 12 divides the first activity space into four activity areas, and an upper piston 13 is installed in each activity area; the upper piston 13 performs linear reciprocating motion along the upper sealing plate 12 in the activity area; a through hole is opened on the upper cover 4, and the through hole is a third heat dissipation channel 41; there are four third heat dissipation channels 41, which are evenly distributed on the upper cover 4 and communicate with the four activity areas in the first activity space, the upper part of the upper sealing plate 12 is fixed to the upper cover 4, and the lower part of the upper sealing plate 12 is fixed to the upper surface of the inner cylinder 2. One side of the upper piston 13 is connected to one end of the upper spring 14, and the other end of the upper spring 14 is fixed to the inner wall of the outer cylinder 1; the other side of the upper piston 13 is connected to the cam 7; the cam 7 and the rotating shaft 6 are interference connected, and the upper sealing plate is L-shaped.

The second activity space is between the lower cover 5 and the lower surface of the inner cylinder 2; a lower sealing plate is installed in the second activity space, and the lower sealing plate divides the second activity space into four activity areas, and a lower piston 15 is installed in each activity area; the lower piston 15 reciprocates along the lower sealing plates in the activity area; a through hole is opened on the lower cover 5, and the through hole is the fourth heat dissipation channel 51. There are four fourth heat dissipation channels, which are respectively connected to the four activity areas in the second activity space. One side of the lower piston 15 is connected to one end of the lower spring 16, and the other end of the lower spring 16 is fixed on the inner wall of the outer cylinder body 1; the other side of the lower piston 15 is connected to the cam 7; the cam 7 and the rotating shaft 6 are interference connected. The lower part of the lower sealing plate is fixed to the lower cover, and the upper part of the lower sealing plate is fixed to the lower surface of the inner cylinder body, and the lower sealing plate is L-shaped.

Claims (7)

1. The disk type magnetorheological fluid damper capable of automatically radiating is characterized by comprising an outer cylinder body, an inner cylinder body, an upper cover, a lower cover, an inertia ring, a rotating shaft and a cam; the outer cylinder body is in a circular ring shape; the upper cover is arranged above the outer cylinder body, and the lower cover is arranged below the outer cylinder body; the inner cylinder body is arranged in the outer cylinder body; the inertial ring is arranged in the inner cylinder body, the inertial ring can move in the inner cylinder body, a gap is formed between the inertial ring and the inner cylinder body, the gap is a magnetorheological damping channel, and magnetorheological fluid is arranged in the magnetorheological damping channel; the rotating shaft sequentially passes through the upper cover, the inner cylinder body, the inertia ring and the lower cover from top to bottom; the surface of the inner cylinder body is wound with a coil;

a gap is formed between the inner cylinder body and the outer cylinder body, and is a first heat dissipation channel;

the two sides of the outer cylinder body are provided with through holes which are second heat dissipation channels;

A first movable space is formed between the upper cover and the upper surface of the inner cylinder body; an upper sealing plate is arranged in the first movable space, the first movable space is divided into four movable areas by the upper sealing plate, and an upper piston is arranged in each movable area; the upper piston makes linear reciprocating motion in the movable area along the upper sealing plate; the upper cover is provided with a through hole which is a third heat dissipation channel; the third heat dissipation channel is communicated with the first movable space; one side of the upper piston is connected with one end of an upper spring, and the other end of the upper spring is fixed on the inner wall of the outer cylinder body; the other side of the upper piston is connected with a cam wire; the cam is in interference connection with the rotating shaft;

A second movable space is arranged between the lower cover and the lower surface of the inner cylinder; a lower sealing plate is arranged in the second movable room, the lower sealing plate divides the second movable space into four movable areas, and a lower piston is arranged in each movable area; the lower piston makes linear reciprocating motion in the movable area along the lower sealing plate; the lower cover is provided with a through hole, and the through hole is a fourth heat dissipation channel; the fourth heat dissipation channel is communicated with the second movable space; one side of the lower piston is connected with one end of a lower spring, and the other end of the lower spring is fixed on the inner wall of the outer cylinder body; the other side of the lower piston is connected with a cam wire; the cam is in interference connection with the rotating shaft;

The through holes at two sides of the outer cylinder body, namely the second heat dissipation channel, have center points on the same straight line with the center points of the coils;

The upper sealing plate is L-shaped;

the lower sealing plate is L-shaped.

2. The automatic heat dissipating disc type magnetorheological fluid damper of claim 1, wherein the upper portion of the upper sealing plate is fixed to the upper cover, and the lower portion of the upper sealing plate is fixed to the upper surface of the inner cylinder.

3. The self-cooling disk type magnetorheological fluid damper of claim 1, wherein the lower portion of the lower seal plate is fixed to the lower cover, and the upper portion of the lower seal is fixed to the lower surface of the inner cylinder.

4. The self-dissipating disc magnetorheological fluid damper of claim 1, wherein the first dissipating channel is in communication with the first active space.

5. The self-dissipating disc magnetorheological fluid damper of claim 1, wherein the first dissipating channel is in communication with the second active space.

6. The automatic heat dissipating disc type magnetorheological fluid damper of claim 1, wherein the four third heat dissipating channels are respectively in communication with the four active areas in the first active space.

7. The automatic heat dissipating disc type magnetorheological fluid damper of claim 1, wherein the fourth heat dissipating channels are four and each of the four heat dissipating channels is in communication with four of the active areas in the second active space.