Rotary magnetorheological damper based on blade paddle structure

Abstract

A rotary magneto-rheological damper based on a blade paddle structure relates to the technical field of dampers and comprises a stator part, a rotor part, a magnet exciting coil, magneto-rheological fluid and a sealing assembly part, and the stator part comprises a left end cover, an inner magnetic conductive cylinder barrel, an outer heat conductive cylinder barrel and a right end cover; the rotor part comprises a main shaft, a rotor and a blade paddle; the magnetorheological fluid is respectively filled between the magnetic conductive cylinder barrel and the rotor and between the blade paddle and the magnetic conductive cylinder barrel; the magneto-rheological damper has the advantages that the condition that the magnetorheological fluid is affected by sedimentation and temperature to deteriorate the state of the magnetorheological fluid, so that the performance of the damper is reduced can be avoided, the service life of the damper is prolonged, and the torque transmitted by the damper can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetorheological damper technical field, concretely relates to a kind of high-performance magnetorheological dampers based on blade paddle structure to increase transmission torque. BACKGROUND

[0002] With the continuous development of mechanical transmission technology, the operation stability and safety of mechanical system become particularly important, but most of the current rotary magnetorheological dampers face the problem of insufficient output damping torque or excessive volume;And the viscosity dissipation of magnetorheological fluid in the damper and the heat generated by the excitation coil cause temperature accumulation in the damper, which affects the working performance of the magnetorheological fluid and reduces the service life of the damper.

[0003] Therefore, in view of the problems of insufficient output torque, large internal heat generation, performance degradation of magnetorheological fluid and short service life when the existing magnetorheological damper is in long-time working condition, a rotary magnetorheological damper based on blade paddle structure is proposed, which can effectively increase the damping torque. SUMMARY

[0004] Therefore, in view of the problems of insufficient output torque, large internal heat generation, performance degradation of magnetorheological fluid and short service life when the existing magnetorheological damper is in long-time working condition, a rotary magnetorheological damper based on blade paddle structure is proposed, which can effectively increase the damping torque.

[0005] The rotary magnetorheological damper based on blade paddle structure provided by the utility model adopts the following technical solutions:

[0006] A rotary magnetorheological damper based on blade paddle structure, the damper comprises a stator part, a rotor part, an excitation coil, a magnetorheological fluid and a sealing assembly part, the stator part comprises a left end cover, an inner magnetic cylinder, an outer heat conducting cylinder and a right end cover; the magnetorheological damper mainly comprises

[0007] The left end cover, the main shaft, the inner magnetic cylinder, the outer heat conducting cylinder, the rotor, the blade paddle and the right end cover. The stator part comprises a left end cover, an inner magnetic cylinder, an outer heat conducting cylinder and a right end cover; the rotor part comprises a main shaft, a rotor and a blade paddle; the magnetorheological fluid is filled between the inner magnetic cylinder and the rotor, between the blade paddle and the inner magnetic cylinder respectively; the excitation coil is wound inside the rotor, and is led out through the lead hole inside the rotor and the main shaft; the sealing assembly part comprises a sealing O-ring, a skeleton sealing ring and a bearing.

[0008] Further, the left end cover, the main shaft, the outer heat conduction cylinder, the blade paddle, the sealing O-shaped ring, the screw, the skeleton sealing ring, the bearing and the right end cover are made of non-magnetic metal material; the rotor and the inner magnetic cylinder are made of magnetic metal material; and the excitation coil is made of enameled copper wire.

[0009] Further, the middle section of the main shaft is provided with external threads, is connected with the rotor through the threads, is provided with a key groove and is connected with the blade paddle through the key; the inner magnetic cylinder is connected with the left end cover and the right end cover through bolts inside the outer heat conduction cylinder; and the excitation coil is wound inside the rotor.

[0010] Further, the blade paddle is left with a gap between the rotor and the left end cover to avoid interference with the rotation of the blade paddle; and the rotor is left with a gap between the blade paddle and the right end cover to avoid interference with the rotation of the rotor.

[0011] Further, the rotor and the main shaft are provided with liquid flow holes for the flow of the magnetorheological liquid at a position close to the center.

[0012] Further, a radial wire outlet hole is formed on the winding frame of the rotor and is matched with an axial wire outlet hole on the main shaft.

[0013] Further, the cylinder is provided with left and right end covers for sealing the cylinder, and the end covers are detachably arranged on the cylinder.

[0014] Further, the left end cover is provided with two center-symmetrical oil injection holes for filling the magnetorheological liquid.

[0015] In summary, the magnetorheological damper can provide stable and efficient performance under high-speed rotating conditions and provide reliable output torque under the control of an external power supply; the blade structure at the left end of the rotor can realize the liquid conveying effect similar to the principle of a centrifugal pump, thereby promoting the circulation of the magnetorheological liquid inside, avoiding the deterioration of the magnetorheological liquid under the influence of temperature in the high-speed state, and causing the performance of the brake to decrease; meanwhile, the rotation of the blade can form a valve type working mode, thereby providing two kinds of damping torque of the shear valve type to the main shaft system. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a structural schematic diagram of the utility model embodiment.

[0018] Figure 2 Figure 1 is a schematic diagram of the embodiment of the utility model;

[0019] Figure 3 Figure 2 is a schematic diagram of the blade structure of the embodiment of the utility model;

[0020] Figure 4 Figure 3 is an assembly sectional view of the rotor and the blade paddle of the embodiment of the utility model.

[0021] Mark explanation:

[0022] 1, main shaft; 2, left end cover; 3, oil injection screw; 4, oil injection hole; 5, blade paddle; 6, inner magnetic cylinder; 7, rotor; 8, outer heat conduction cylinder; 9, wire hole; 10, excitation coil; 11, water injection hole; 12, rotor; 13, right end cover; 14, liquid flow hole; 15, main shaft wire hole; 16, liquid flow hole; 17, bearing; 18, skeleton sealing ring; 19, O-shaped sealing ring; 20, bolt. Specific implementation

[0023] The implementation mode of the utility model is explained below through specific examples, and other advantages and effects of the utility model can be easily understood by those skilled in the art from the disclosure of the specification. The utility model can also be implemented or applied through other different specific implementation modes, and each item in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model.

[0024] The following structure is attached Figures 1-4 The utility model is further explained in detail.

[0025] The embodiment of the utility model discloses a rotary magnetorheological damper based on blade paddle structure. Referring to Figures 1-4 The rotary magnetorheological damper based on blade paddle structure includes main shaft 1, outer heat conduction cylinder 8 filled with cooling water, inner magnetic cylinder 6 filled with magnetorheological liquid, rotor 7 and blade paddle 5 arranged in the cylinder, left and right end covers 2 for forming closed space at both ends of the cylinder, excitation coil 10 is arranged on the wire holder in the rotor 7, the wire of excitation coil 10 is led out from the wire hole 9 opened on the rotor and leads to the wire hole 16 on the main shaft 1, the rotor 7 and the blade paddle 5 are coaxially arranged on the main shaft 1, and the rotor 7 and the inner magnetic cylinder 6 are left with a gap and filled with magnetorheological liquid.

[0026] To ensure that the magnetorheological fluid in the effective gap can generate enough shear stress under the action of the excitation magnetic field of the excitation coil 10, the width of the gap should not be too large, about 1-4mm, the blade paddle 5 is a parallel blade structure to generate enough centrifugal pressure, when the main shaft 1 rotates, the internal magnetorheological fluid can be driven by centrifugal force to generate enough pressure in the space of the inner magnetic cylinder 6, so that the magnetorheological fluid circulates in the internal, promotes the heat dissipation of the magnetorheological fluid, and forms a valve structure inside to provide a certain damping torque. The output damping torque of the damper mainly comes from the damping torque generated by the rheological effect of the magnetorheological fluid in the gap between the rotor 7 and the inner magnetic cylinder 6 under the excitation magnetic field, and the damping torque generated by the rotating pressure of the blade paddle 5.

[0027] In high-speed rotating motion occasions, it can provide stable and efficient performance, and under the regulation of external power supply, it can provide controllable output torque. The rotation of the blade 5 structure at the left end of the rotor 7 can realize the liquid conveying effect similar to the working principle of a centrifugal pump, forming a larger liquid pressure between the blade 5 and the magnetic cylinder 6, promoting the circulation of the internal magnetorheological fluid, avoiding the deterioration of the state of the magnetorheological fluid under the influence of temperature in high-speed state, and causing the performance of the damper to decline; at the same time, under the magnetic field condition, a valve structure can be formed to provide a certain damping torque to the main shaft system.

[0028] In this embodiment, the inner magnetic cylinder 6 and the outer heat conducting cylinder 8 are provided with left and right end covers 2 for forming a closed space, and the inner magnetic cylinder 6 and the outer heat conducting cylinder 8 are sealed with the end covers to avoid leakage of the magnetorheological fluid. The end cover 2 is installed on the magnetic cylinder 6 and the heat conducting cylinder 8 by bolts, facilitating disassembly of the end cover 2.

[0029] In this embodiment, the rotor 7 is composed of left and right concave hollow cylinders and a middle winding frame, facilitating winding of the excitation coil 10, and providing a longer effective liquid flow channel. The center has an internal thread, which is connected with the main shaft 1 through a thread.

[0030] The main shaft 1 is provided with a liquid flow hole 14 for circulation of the magnetorheological fluid; the main shaft 1 is provided with a lead hole 9 for leading out the excitation coil 10 wound in the rotor 7 and a wire outlet hole 15 for leading out the excitation coil 10 from the main shaft; the main shaft is provided with a clamping spring hole for preventing axial sliding of the blade paddle 5 and the rotor 7 during rotation.

[0031] The inner magnetic cylinder 6 and the outer heat conducting cylinder 8 are provided with left and right end covers 2 and 13 for sealing the inner magnetic cylinder and the outer heat conducting cylinder; the left and right end covers are detachably arranged at the two ends of the inner magnetic cylinder and the outer heat conducting cylinder 8; the outer heat conducting cylinder 8 is provided with water inlet holes and water outlet holes 11 at the upper and lower ends.

[0032] The rotor 7 is an I-shaped rotor with magnetic guide arms; the rotor 7 is arranged to be detachably composed of a middle coil holder and two end concave hollow rotors, and is used for winding coils on the coil holder.

[0033] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above example is only used for helping to understand the method and core idea of the present application. The above description is only the preferred implementation manner of the present application, and it should be pointed out that, due to the limited expression, there are infinite specific structures, and for ordinary skilled in the art, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can be combined in a proper way; the improvements, decorations, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the present application.

Claims

1. A rotary magnetorheological damper based on a blade propeller structure, characterized in that: It consists of a stator, a rotor, an excitation coil, a magnetorheological fluid, and a sealing assembly. The stator is composed of a left end cover, an inner magnetic cylinder, an outer heat-conducting cylinder, and a right end cover. The magnetorheological damper includes a left end cover (2), a main shaft (1), an inner magnetic cylinder (6), an outer heat-conducting cylinder (8), a rotor (7), a blade propeller (5), and a right end cover (13). The stator part consists of a left end cover (2), an inner magnetic cylinder (6), an outer heat-conducting cylinder (8), and a right end cover (13); the rotor part consists of a main shaft (1), a rotor (7), and a blade propeller (5); the magnetorheological fluid is filled between the inner magnetic cylinder (6) and the rotor (7), and between the blade propeller (5) and the inner magnetic cylinder (6); the excitation coil (10) is wound inside the rotor (7) and led out through the lead wire hole (9) inside the rotor (7) and the main shaft (1); the sealing assembly part consists of a sealing O-ring (19), a skeleton sealing ring (18), and a bearing (17).

2. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: The left end cover (2), main shaft (1), outer heat-conducting cylinder (8), blade propeller (5), sealing O-ring (19), screw (20), skeleton sealing ring (18), bearing (17) and right end cover (13) are all made of non-magnetic metal material; the rotor (7) and inner magnetic cylinder (6) are made of magnetic metal material.

3. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: The main shaft (1) has an external thread in the middle section, which is connected to the rotor (7) by the thread and has a keyway, which is connected to the blade propeller (5) by the key. The inner magnetic cylinder (6) is connected to the left end cover (2) and the right end cover (13) inside the outer heat-conducting cylinder (8) by bolts. The excitation coil (10) is wound inside the rotor (7).

4. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: A gap is left between the blade (5) and the rotor (7) and the left end cover (2) to avoid interfering with the rotation of the blade (5); a gap is left between the rotor (7) and the blade (5) and the right end cover (13) to avoid interfering with the rotation of the rotor (7).

5. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: The main shaft (1) is provided with a fluid flow hole (14) for the circulation of magnetorheological fluid; the main shaft (1) is provided with a lead hole (9) for leading out the excitation coil (10) wound inside the rotor (7) and an outlet hole (15) for leading out the excitation coil (10) from the main shaft (1); the main shaft (1) is provided with a snap ring hole on the outside to prevent the blade (5) and the rotor (7) from sliding axially during rotation.

6. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: The inner magnetic cylinder (6) and the outer heat-conducting cylinder (8) are provided with a left end cap (2) and a right end cap (13) for sealing the inner magnetic cylinder (6) and the outer heat-conducting cylinder (8). The left end cap (2) and the right end cap (13) are detachably provided at both ends of the inner magnetic cylinder (6) and the outer heat-conducting cylinder (8). The outer heat-conducting cylinder (8) is provided with a water inlet and a water outlet (11) at both the upper and lower ends.

7. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: The left end cap (2) is provided with two oil injection holes (4) for filling magnetorheological fluid.

8. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: The rotor (7) is an I-shaped rotor with a magnetic guide arm; the rotor (7) is configured to be detachably composed of a middle winding frame and concave hollow rotors at both ends, and is used to wind coils on the winding frame.

9. The rotary magnetorheological damper based on a blade propeller structure according to claim 1, characterized in that: The rotor (7) has an internal thread that is threaded to the main shaft (1).

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