CN110725875A

CN110725875A - Braking device

Info

Publication number: CN110725875A
Application number: CN201810783763.6A
Authority: CN
Inventors: 张甫州
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-07-17
Filing date: 2018-07-17
Publication date: 2020-01-24

Abstract

The embodiment of the invention provides a braking device, which belongs to the technical field of non-friction braking and comprises the following components: the device comprises a brake box body, a box cover, shear thickening liquid, two rotor shear rods, a stator shear rod, a shaft and a vent plug; the stator and the rotor are arranged in the box body, shear thickening liquid is filled in the box body, and the rotor shear rod and the stator shear rod are immersed in the shear thickening liquid. The rotor shearing rods are assembled and fixed with the shaft, and the stator shearing rods are arranged in the box body and are positioned between the two rotor shearing rods and separated from the shaft. The method is characterized in that the physical characteristics of shear thickening liquid (non-Newtonian fluid) are utilized, the shear thickening liquid is filled in a reduction gearbox body, the rotor is sheared in the shear thickening liquid, the viscosity of the liquid is changed by impact, the physical representation is converted from a liquid phase to a solid phase, the rotor rotates under the action of great resistance, and the resistance is output through a shaft, a rod and other components connected with the rotor to achieve the purpose of braking. The solid-liquid phase conversion of the shear thickening body is rapid and reversible, so that the braking effect and the heat dissipation effect are very good. The brake has the characteristics of high braking power, high heat dissipation efficiency, high reliability and the like, and is widely applicable to the fields of high-speed and high-power vehicles and industry.

Description

Braking device

Technical Field

The invention relates to a non-friction braking technology, in particular to a braking device.

Background

A brake is a device having a function of decelerating, stopping, or holding a stopped state of a moving member (or a moving machine). Are mechanical parts that stop or decelerate the motion in the machine. Commonly called brake and brake. Some brakes are also equipped with automatic adjustment of the braking clearance, and in order to reduce the braking torque and the structural size, the brake is usually mounted on the high-speed shaft of the equipment, but large equipment (such as mine hoist, elevator, etc.) with high safety requirements is mounted on the low-speed shaft close to the working part of the equipment. For automobiles frequently running from mountainous areas or hilly areas, a retarder is required to be additionally arranged in order to continuously reduce or maintain a stable speed and reduce or eliminate the load of a brake for a long time when the automobiles go down a long slope. According to different working principles, the automobile retarder can be divided into typical structural forms such as an engine retarding device, a hydraulic retarder, an electric turbine retarder, a motor retarding device and an aerodynamic retarding device. However, the existing design of the braking or retarding device can cause the control assembly to generate heat and wear, and the temperature rises rapidly to influence the braking effect, so the device is not suitable for the auxiliary braking system of heavy trucks and trains.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a brake apparatus capable of achieving braking by utilizing a physical characteristic that a shear thickening fluid is changed in impact viscosity, and effectively improving the above-mentioned defects by making the shear thickening fluid be liquid in nature and large in heat capacity and by efficiently dissipating heat through a water inlet and an air outlet.

The embodiment of the invention is realized by the following modes:

an embodiment of the present invention provides a brake apparatus including: the device comprises a brake box body, a box cover, shear thickening liquid, two rotor shear rods, a stator shear rod, a shaft and a vent plug; the stator and the rotor are arranged in the box body, shear thickening liquid is filled in the box body, and the rotor shear rod and the stator shear rod are immersed in the shear thickening liquid. The rotor shearing rods are assembled and fixed with the shaft, and the stator shearing rods are arranged in the box body and are positioned between the two rotor shearing rods and separated from the shaft.

Shear thickening fluid: as is well known, fluids can be divided into newtonian and non-newtonian fluids, with most non-newtonian fluids being pseudoplastic fluids, also referred to as shear-thinning fluids. The method is characterized in that: the rheological curves of shear stress and shear rate pass through the origin and are nonlinear in that shear rate increases faster than shear stress and the apparent viscosity of the fluid decreases with increasing shear rate, a phenomenon known as shear thinning. The present invention utilizes Shear Thickening Fluid (STF). Its apparent viscosity increases with increasing shear stress, may increase discontinuously, and is reversible. Shear thickening materials are normally soft and when subjected to high speed impacts, the viscosity of the material increases dramatically, even approaching a solid. When the external force disappears, the material can be restored to a flexible state, and impact energy can be well absorbed. For example, when a stick is immersed in a shear thickening fluid, it cannot be quickly pulled out, and when the stick tends to pull out, the shear thickening fluid is instantaneously increased in impact viscosity to firmly "stick" the stick to the wood root.

Specifically, this stopper can utilize shear thickening liquid's physical characteristic, and the during operation, in the box, shear thickening liquid receives rotor shear bar and stator shear bar's impact, and viscosity increases in the twinkling of an eye, and solution appearance is the solid phase even, and rotor shear bar receives very big resistance this moment, exports the resistance through the axle, reaches the purpose of braking, and during the stop work, shear thickening liquid viscosity resumes. If the temperature rises during operation, can be fast and even with heat diffusion in solution, the inside moisture of solution will be heated and evaporate, gets rid of through the breather plug and takes away the heat, and the moisture that evaporates supplements through the water inlet. The heat dissipation is very efficient.

Alternatively, the rotor is assembled with the shaft and the braking torque is output through the shaft.

Optionally, the stator is located between the two rotors.

Alternatively, the shear thickening fluid may be any fluid that is characterized by shear thickening behavior, i.e., a change in viscosity upon impact, and may even change to a solid phase.

Optionally, a vent plug is provided at the top of the lid.

Optionally, the lower part of the box body is provided with a water inlet.

The embodiment of the invention has the beneficial effects that:

to sum up, this stopper can utilize shear thickening liquid's physical characteristic for shear thickening liquid can provide great braking torque when the rotor rotates in the box, and the even diffusion of heat is taken away inside liquid and by inside moisture evaporation during the heat dissipation, and the radiating efficiency is high. The practical use effect is good. The device has reasonable design, simple and reliable structure and huge market application potential.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a view showing an internal structure of a brake according to embodiment 1 of the present invention

FIG. 2 is a brake housing cover portion of embodiment 1 provided by the present invention;

fig. 3 is a schematic view of a brake provided in embodiment 1 of the present invention from a first perspective;

FIG. 4 is a top view of the case of FIG. 1;

FIG. 5 is a schematic view of the rotor shear bar shown in FIG. 1;

FIG. 6 is a schematic view of the stator shear bar shown in FIG. 1;

fig. 7 is a schematic view of the assembly of the rotor-stator shown in fig. 1 with a shaft.

Icon: 101-brake internal structure; 100-a brake; 50-a box cover; 10-a box body; 11-a water through port; 12-a stator spacing groove; 20-a rotor; 30-a stator; 40-axis; 51-vent; 60-a vent plug; 70-a bearing; 301-stator limiting part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "horizontal", "vertical", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally place when used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "disposed," "mounted," and "connected" are to be construed broadly and may include, for example, a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Please refer to fig. 1 to 7

An embodiment of the present invention provides a brake 100 including: brake housing 10, cover 50, rotor shear bar 20, stator shear bar 30, shaft 40, breather plug 60, and shear thickening fluid. The shaft 30 is connected with the rotor shearing rod 20 and penetrates through the stator shearing rod 30, wherein the stator shearing rod is provided with a plurality of limiting parts 301; the braking box body is provided with a plurality of limiting grooves 11 for matching with the stator limiting parts, so that the stator cutting rod is fixed and the braking box body is fixed by matching with the limiting parts on the stator cutting rod. The stator and the rotor are all arranged in the box body, and the box body is filled with shear thickening liquid.

Referring to fig. 7, the diameter of the middle hole of the stator between the stator shear bar and the two rotors is larger and is not in contact with the shaft.

The shear thickening fluid is any fluid having an apparent viscosity that changes upon impact, and the present invention is illustrated by way of example and not specifically limited.

Further, the braking device further includes: and a vent plug 60 for emitting internal water vapor after the temperature of the shear thickening fluid is raised, and preventing contamination by external impurities. Meanwhile, the box body 10 is provided with a water filling port 11 for supplementing water lost by evaporation of water in the liquid. And simultaneously can play a role in cooling.

Referring to fig. 1, the brake 100 can utilize the physical characteristics of the shear-thickening fluid, and after power is transmitted to the rotor shear bars through the shaft 40, the viscosity of the shear-thickening fluid increases under the action of the rotor shear bars 20 and the stator shear bars 30, and the shear-thickening fluid can firmly "stick" the rotor shear bars, the stator shear bars and the inner wall of the box body, so as to absorb the kinetic energy of the rotor and achieve the purpose of braking.

Please refer to fig. 4, fig. 6 and fig. 7. The limiting part 301 of the stator shearing rod is arranged in the limiting groove 12 of the box body, so that when the rotor drives the shear thickening liquid to flow, the stator shearing rod is relatively fixed.

Wherein the stator shear bar functions as follows: the shear thickening fluid is forced to flow by the rotor shear bar, and the stator is placed between the two rotors to interfere with the flow to obtain a greater braking torque. On the other hand, the stator shear bar provides more contact area, resulting in more "stick" area for the shear thickening fluid, and also results in greater braking torque.

The method of obtaining a greater braking torque is also: the inside of the box body is provided with a plurality of protruding and hump-shaped structures, a rotor is provided with rod pieces, and the like, so that the contact area is increased.

The brake box body is in a sealed state, and the shear thickening liquid filled in the brake box body is ensured not to leak. Shear thickening fluid, which means that the viscosity of a fluid increases with increasing shear rate, belongs to a class of non-newtonian fluids. non-Newtonian fluids are fluids that do not satisfy the experimental laws of Newtonian viscosity, i.e., fluids in which the shear stress and shear strain rate are not linear. Non-newtonian fluids are widely found in life, production and nature. Most biological fluids belong to the non-newtonian fluids now defined. Various body fluids such as blood, lymph, cystic fluid, etc., and "semifluid" such as cytoplasm are non-newtonian fluids. The viscosity of some non-newtonian fluids increases with increasing shear rate (a phenomenon known as shear thickening). non-Newtonian fluids are generally defined as those in which the F/S relationship is not constant, i.e., when different shear forces are applied, they do not vary with the same proportion or even in the same direction. The viscosity of these fluids is affected by different shear rates. Shear thickening fluid flow can be thought of as the fluid being composed of molecules of different shapes and sizes that require how much force to move them as they flow past each other, i.e., flow occurs, will depend on their size, shape and adhesion. The manner of alignment at different shear rates will be different and require more or less total force to maintain motion. The viscosity of the fluid may change due to the pressure or velocity experienced, and the greater the pressure, the faster the velocity, the more the viscosity may increase, and may even become a temporary solid. A pot of non-newtonian fluid into which your hand will sink if you slowly insert your hand into an aqueous solution, and which will be saturated with solution when you remove it. However, when you hit a non-newtonian fluid with force, the contact surface "stiffens" as the viscosity increases due to the high pressure.

In this embodiment, when rotor shear bar work was rotated, stir ceaselessly shear thickening liquid in the brake box, it remains higher viscosity throughout, hinders the motion of rotor and stops completely until the rotor, and the kinetic energy of high-efficient absorption rotor during turns into heat energy with it to with the even diffusion of heat energy in liquid, the evaporation of the inside moisture of rethread liquid takes away heat energy through the air lock, and is further, through bottom half water filling port supplementary evaporation moisture and cooling, the heat dissipation is very high-efficient.

It should be noted that the present embodiment should also include other accessory parts such as screws, seal rings, end caps, etc., which are omitted since they are not too much related to the present disclosure.

In summary, the following steps: an embodiment of the present invention provides a brake apparatus including: the device comprises shear thickening liquid, a brake box body, a box cover, a rotor shear rod and a stator shear rod; the rotor shearing rod is assembled with the shaft and penetrates through the stator shearing rod to be arranged in the box body, and the shaft is connected with the box body through a bearing. The box is filled with shear thickening liquid, the stator is equipped with spacing portion for with the spacing groove cooperation that the box was equipped with. The box body is provided with a water through hole for supplementing heat dissipation moisture, and the box cover is provided with a vent hole and is provided with a vent plug for evaporating moisture in the liquid and preventing external impurities from polluting the liquid.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A brake apparatus, comprising: brake box, rotor.

The box is internally filled with shear thickening liquid, the rotor and the transmission part are assembled in the box, and the box is provided with a water filling port and an exhaust port.

2. A braking apparatus in accordance with claim 1, characterised in that the shear thickening fluid comprises all fluids having a viscosity which changes on impact.

3. A braking apparatus in accordance with claim 1, characterised in that the rotor is of any shape and is movable relative to the housing.

4. A braking apparatus in accordance with claim 1, characterised in that a stator is provided within the brake housing.

5. The braking apparatus of claim 4, wherein the stator is assembled or fixedly connected with the housing.

6. A braking apparatus in accordance with claim 5, wherein the magnitude of the braking force is controlled by controlling the font or the contact area of the rotor with the shear thickening fluid.

7. The braking device according to claim 6, wherein the heat is dissipated by evaporation of water from the interior of the solution and by replenishment of water from the water filling port.