WO2023279748A1

WO2023279748A1 - Hybrid damping mode-based high-output-force vibration isolation mount

Info

Publication number: WO2023279748A1
Application number: PCT/CN2022/079860
Authority: WO
Inventors: 徐涵欧
Original assignee: 深圳市朝上科技有限责任公司
Priority date: 2021-07-07
Filing date: 2022-03-09
Publication date: 2023-01-12
Also published as: CN113513558B; CN113513558A

Abstract

A hybrid damping mode-based high-output-force vibration isolation mount, comprising a main rubber spring (1) and a magnetorheological damper (2). The magnetorheological damper (2) comprises an upper cover plate (21), a lower cover plate (22), a piston rod (24), a combined piston head (26), a magnetic isolation sleeve (27), and a coil (28); the main rubber spring (1) covers the upper cover plate (21); one end of the piston rod (24) penetrates through the main rubber spring (1), and the other end of the piston rod (24) is fixedly connected to the combined piston head (26); a magnetorheological effect area is formed between the upper cover plate (21) and the lower cover plate (22); the combined piston head (26) and the magnetic isolation sleeve (27) are located in the magnetorheological effect area; the combined piston head (26) has an interference fit with the magnetic isolation sleeve (27); the combined piston head (26) slides along the inner wall of the magnetic isolation sleeve (27); the gaps between the upper cover plate (21), the lower cover plate (22), the magnetic isolation sleeve (27), and the combined piston head (26) are filled with a magnetorheological fluid (25); the coil (28) is wound on the magnetic isolation sleeve (27); and the coil (28) is configured to form a magnetic circuit after being energized. The hybrid damping mode-based high-output-force vibration isolation mount has a simple structure and high reliability and can output a large damping force in a short stroke.

Description

A High Output Force Vibration Isolation Mount Based on Hybrid Damping Mode

technical field

The invention relates to the technical field of engine magnetorheological vibration isolation mounts, in particular to a high output force vibration isolation mount based on a hybrid damping mode.

Background technique

As the main power source of the vehicle, the power plant will inevitably cause vibration and noise due to the impact and inertial force generated by the combustion of internal fuel and the movement of the crankshaft and other mechanisms. In order to reduce the impact of the above vibration and noise, the most effective method at present is to install a vibration isolation suspension system between the power unit and the vehicle body.

Magneto-rheological hydraulic mount is a semi-active mount with magnetorheological smart material as the medium. The viscosity and yield stress of magnetorheological fluid can change with the change of the external magnetic field, and this change has the characteristics of fast, reversible and controllable. Magneto-rheological hydraulic mount is to use the characteristics of magnetorheological fluid to change the output damping force of magnetorheological hydraulic mount by controlling the current in the excitation coil to change the magnetic field strength, so as to attenuate the vibration of the engine. This process responds Rapid, continuous process, reversible. It can adjust its vibration isolation parameters (such as damping or stiffness) adaptively under the drive of a small current in real time according to changes in the external environment to achieve the optimal vibration isolation effect. Since the semi-active magneto-rheological mount has The advantages of low energy consumption, strong controllability, fast response speed and good reliability make it have great application prospects in vibration isolation in vehicle power plants.

However, most of the traditional magnetorheological mounts use a single working mode of magnetorheological materials (such as shear, flow or extrusion mode, etc.), and the controllable damping force that can be generated is limited. On the premise of not increasing the size of the mount Under such circumstances, it is difficult to meet the vibration isolation requirements of the ever-growing high-power and high-speed power plant.

Contents of the invention

Based on this, it is necessary to provide a high-output force vibration-isolation mount based on a hybrid damping mode for the problem that the output force of the traditional magneto-rheological mount is small and it is difficult to meet the vibration isolation requirements of high-power power plants.

A high output force vibration isolation mount based on a hybrid damping mode, including a rubber main spring and a magnetorheological damper, where,

The magnetorheological damper includes an upper cover plate, a lower cover plate, a piston rod, a combined piston head, a magnetic isolation sleeve and a coil,

The rubber main spring cover is closed on the upper cover plate, one end of the piston rod passes through the rubber main spring, the other end of the piston rod is fixedly connected with the combined piston head, and the upper cover plate and A magneto-rheological effect area is formed between the lower cover plates, the combined piston head and the magnetic isolation sleeve are located in the magneto-rheological effect area, and the combined piston head and the magnetic isolation sleeve interfere Cooperate, the combined piston head slides along the inner wall of the magnetic isolation sleeve, and the gap between the upper cover plate, the lower cover plate, the magnetic isolation sleeve and the combined piston head is filled Magneto-rheological fluid, the coil is wound on the magnetic isolation sleeve, and the coil is used to form a magnetic circuit after passing an electric current.

In one of the embodiments, the combined piston head includes an upper end cover, a middle partition and a lower piston, the middle partition is fixedly connected with the piston rod, and the upper end cover and the lower piston are respectively connected to the The magnetic isolation sleeve is an interference fit.

In one of the embodiments, a "bow" circuit is formed among the upper cover plate, the lower cover plate, the magnetic isolation sleeve, the upper end cover, the middle partition plate and the lower piston, and the Magnetorheological fluid fills the "bow" type circuit.

In one of the embodiments, the upper end cap and the bottom of the lower piston are respectively opened with 8 small holes with equal diameters.

In one of the embodiments, the combined piston head is a molded piece of magnetically permeable material.

In one of the embodiments, the magnetic isolation sleeve is a molded part of non-magnetic permeable material.

In one of the embodiments, the piston rod includes an upper connecting rod and a lower connecting rod, and the upper connecting rod and the lower connecting rod are screwed together.

In one of the embodiments, the lower cover is fixedly connected to the upper cover by bolts.

In one of the embodiments, the base is fixedly connected to the lower cover plate through bolts.

In one of the embodiments, the rubber main spring is fixedly connected to the upper cover plate through bolts.

The above-mentioned high-output vibration-isolation mount based on the hybrid damping mode, on the one hand, the mount piston rod is excited by an external power device to make a linear reciprocating motion in the vertical direction, driving the combined piston head to squeeze the magneto-rheological On the other hand, the magnetic circuit is formed after the coil passes current. Under the action of the magnetic field, the magnetorheological extrusion force is generated in the upper and lower parts of the magnetorheological fluid, and the magnetorheological extrusion force is generated in the middle of the magnetorheological fluid. Valve flow power. The total damping force is the sum of extrusion force and valve flow force, because the magnetorheological extrusion force is extremely large when the displacement is small. The structure is simple, the reliability is strong, and a large damping force can be output in a short stroke.

Description of drawings

Fig. 1 is a structural schematic diagram of a high-output force vibration-isolation mount based on a hybrid damping mode in one embodiment;

Fig. 2 is a schematic diagram of the working principle of the magneto-rheological damper of one embodiment;

Fig. 3 is a schematic structural view of the upper cover plate.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

As shown in Fig. 1, a high-output force vibration isolation mount based on a hybrid damping mode includes a rubber main spring 1 and a magneto-rheological damper 2 .

The magnetorheological damper 2 includes an upper cover plate 21 , a lower cover plate 22 , a piston rod 24 , a combined piston head 26 , a magnetic isolation sleeve 27 and a coil 28 . For example, the combined piston head 26 is a magnetically permeable material. For example, the upper cover plate 21, the lower cover plate 22, the magnetorheological fluid 25, and the combined piston head 26 are all made of magnetically permeable materials. The magnetic isolation sleeve 26 is a non-magnetic material. The piston rod 24 is a molded part of non-magnetic material. The magnetic isolation sleeve 27 is a non-magnetic material molding.

The rubber main spring 1 is covered on the upper cover plate 21, one end of the piston rod 24 runs through the rubber main spring 1, the other end of the piston rod 24 is fixedly connected with the combined piston head 26, the upper cover plate 21 and the lower cover plate 22 A magneto-rheological effect area is formed between them, the combined piston head 26 and the magnetic isolation sleeve 27 are located in the magneto-rheological effect area, the combined piston head 26 and the magnetic isolation sleeve 27 are interference fit, and the combined piston head 26 is along the Sliding against the inner wall of the magnetic isolation sleeve 27, the gap between the upper cover plate 21, the lower cover plate 22, the magnetic isolation sleeve 27 and the combined piston head 26 is filled with magnetorheological fluid 25, and the coil 28 is wound on the magnetic isolation sleeve On the barrel 27, the coil 28 is used to form a magnetic circuit 29 after passing an electric current. For example, the coil 28 is evenly wound on the outer wall of the magnetic isolation sleeve 27 . The magnetic isolation sleeve 27 wrapped with the coil 28 is in clearance fit with the central hole of the lower cover plate 22 . For example, the lower cover 22 is fixedly connected to the upper cover 21 by bolts. The base 23 is fixedly connected with the lower cover plate 22 by bolts. The rubber main spring 1 is fixedly connected with the upper cover plate 21 by bolts.

In the above-mentioned high-output vibration-isolation mount based on the hybrid damping mode, the mount piston rod 24 is excited by an external power device to perform linear reciprocating motion in the vertical direction, driving the combined piston head 26 to squeeze the magnetorheological fluid upward or downward. , the output extrusion force; and, the coil 28 forms a magnetic circuit 29 after the current is applied, and under the action of the magnetic field, a magneto-rheological extrusion force is generated at the upper and lower parts of the magnetorheological fluid 25, and in the middle of the magnetorheological fluid 25 Generate valve flow power. The total damping force is the sum of extrusion force and valve flow force. Since the magneto-rheological extrusion force is extremely large when the displacement is small, a large damping force can be output in a short stroke, which can solve the problem of traditional magneto-rheological The rheological mount cannot meet the vibration isolation requirements of high-power power plants due to the output damping force.

The combined piston head 26 includes an upper end cover 261 , a middle partition 262 and a lower piston 263 , the middle partition 262 is fixedly connected with the piston rod 24 , and the upper end cover 261 and the lower piston 263 are interference fit with the magnetic isolation sleeve 27 respectively.

As shown in Figures 1 and 3, a "bow" circuit is formed between the upper cover plate 21, the lower cover plate 22, the magnetic isolation sleeve 27, the upper end cover 261, the middle partition plate 262 and the lower piston 263, and the magnetorheological fluid 25 fill in the "bow" type circuit. The upper end cover 261 , the middle partition 262 and the lower piston 263 divide the magnetorheological fluid 25 into regions a, b, c, d, e, f and g. When the power device is working, the suspended piston rod 24 is excited by the power device to produce a vertical upward (or downward) movement, driving the combined piston head 26 fixedly connected with the piston rod to squeeze the magneto-rheological liquid material, so that the magnetorheological fluid in area a is squeezed to flow into area g through areas b, c, d, e, and f. When a current is applied to the coil 28, a magnetic field 29 is generated in the regions a, b, c, d, e, f and g. Under the action of the magnetic field, a magnetorheological extrusion force is generated in the regions a and g. In the region Valve flow forces are generated in c and e. Similarly, when the piston head moves downward, the magnetorheological fluid in area g is squeezed through areas f, e, d, c, b to flow in area a. A magneto-rheological extrusion force is generated, and a valve-like flow force is generated in regions e and c. The total damping force is the sum of the extrusion force and the valve flow force. Since the magneto-rheological extrusion force is extremely large when the displacement is small, the new extrusion-valve mount can generate a large damping force. In addition, by controlling the magnitude of the current in the coil 28, the yield strength of the magneto-rheological fluid 25 can be changed to control the magnitude of the corresponding extrusion and valve flow forces, thereby achieving the purpose of quickly changing the damping force.

As shown in FIG. 2 and FIG. 3 , eight small holes with equal diameters are respectively opened at the bottom of the upper end cover 261 and the lower piston 263 . There are 8 circular holes with equal diameters on the upper end cover 261 . The lower piston 263 upper liquid has 8 circular holes equal in diameter. The diameter of the middle partition 262 is smaller than the outer diameters of the upper end cover 261 and the lower piston 263 .

The piston rod 24 includes an upper connecting rod 241 and a lower connecting rod 242, and the upper connecting rod 241 and the lower connecting rod 242 are screwed together.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims

A high output force vibration isolation mount based on a hybrid damping mode, characterized in that it includes a rubber main spring and a magneto-rheological damper, wherein,

The magnetorheological damper includes an upper cover plate, a lower cover plate, a piston rod, a combined piston head, a magnetic isolation sleeve and a coil,

The rubber main spring cover is closed on the upper cover plate, one end of the piston rod passes through the rubber main spring, the other end of the piston rod is fixedly connected with the combined piston head, and the upper cover plate and A magneto-rheological effect area is formed between the lower cover plates, the combined piston head and the magnetic isolation sleeve are located in the magneto-rheological effect area, and the combined piston head and the magnetic isolation sleeve interfere Cooperate, the combined piston head slides along the inner wall of the magnetic isolation sleeve, and the gap between the upper cover plate, the lower cover plate, the magnetic isolation sleeve and the combined piston head is filled Magneto-rheological fluid, the coil is wound on the magnetic isolation sleeve, and the coil is used to form a magnetic circuit after passing an electric current.
The high output force vibration isolation mount according to claim 1, wherein the combined piston head comprises an upper end cover, a middle partition and a lower piston, and the middle partition is fixedly connected with the piston rod, so that The upper end cover and the lower piston are respectively in interference fit with the magnetic isolation sleeve.
The high output force vibration isolation mount according to claim 2, characterized in that, the upper cover plate, the lower cover plate, the magnetic isolation sleeve, the upper end cover, the middle partition and the lower A "bow" circuit is formed between the pistons, and the magnetorheological fluid is filled in the "bow" circuit.
The high output force vibration isolation mount according to claim 2, characterized in that, the upper end cover and the bottom of the lower piston are respectively opened with 8 small holes with equal diameters.
The vibration isolation mount with high output force according to claim 1, characterized in that, the combined piston head is a molded part made of magnetically permeable material.
The high output force vibration isolation mount according to claim 1, wherein the magnetic isolation sleeve is a molded part made of non-magnetic material.
The high output force vibration isolation mount according to claim 1, wherein the piston rod comprises an upper link and a lower link, and the upper link and the lower link are screwed together.
The high output force vibration isolation mount according to claim 1, wherein the lower cover plate is fixedly connected to the upper cover plate through bolts.
The vibration-isolation mount with high output force according to claim 1, wherein the base is fixedly connected with the lower cover plate through bolts.
The high output force vibration isolation mount according to claim 1, wherein the rubber main spring is fixedly connected to the upper cover plate through bolts.