Double-coil type magnetorheological valve with spiral liquid flow channel

Abstract

The utility model discloses a double-coil type magneto-rheological valve with a spiral liquid flow channel. The double-coil type magneto-rheological valve is mainly composed of an end cover, a valve body, a baffle, a winding sleeve, a magnetism isolating ring, a spiral baffle, a magnetism conducting sleeve, a valve element, a magnet exciting coil and the like. Annular gaps among the winding sleeve, the magnetism isolating ring and the magnetism conducting sleeve form a spiral liquid flow channel under the action of the spiral baffle, the length of the liquid flow channel is increased under the condition that the axial length of the valve element does not need to be increased, and the limited size in the magnetorheological valve is fully utilized. Meanwhile, the two magnet exciting coils with the polarities arranged alternately are arranged, so that the magnetic field intensity between the two magnet exciting coils can be mutually overlapped, and the magnetic isolation rings are reasonably arranged at the bottoms of the magnet exciting coils, so that magnetic lines of force are twisted and vertically pass through the whole section of spiral liquid flow channel, a full-channel type effective damping gap is formed, and the utilization rate of the magnetic field is effectively improved. The magneto-rheological valve can obtain large controllable pressure drop under the conditions that the size is small, the structure is compact and power consumption is low, and the magneto-rheological valve is particularly suitable for being applied to a hydraulic control system with the wide requirement for the pressure adjusting range.

Description

TECHNICAL FIELD

[0001] The utility model relates to a magneto-rheological valve, especially a double-coil magneto-rheological valve with spiral liquid flow channel. BACKGROUND

[0002] Magneto-rheological fluid is an intelligent material with excellent performance and wide application. Its most important property is that it can change from fluid state to solid-like state under the action of magnetic field, and it can restore to fluid state when the magnetic field is removed. The conversion process is in milliseconds. Magneto-rheological valve is a typical application of magneto-rheological fluid as medium. By adjusting and controlling the internal magnetic field of the external current, the shear stress of magneto-rheological fluid changes, and then controllable pressure drop and flow are obtained. Compared with traditional hydraulic control valve, magneto-rheological valve has no relative moving parts, and has the advantages of simple structure, stable operation, fast response speed, continuous controllable pressure drop performance, etc., and has good application prospect.

[0003] The core working area of magneto-rheological valve is located in the liquid flow channel where the magneto-rheological fluid flows. The common structures are divided into three types: axial annular type, radial disc type and axial annular-radial disc hybrid type. The axial annular type liquid flow channel has simple structure and strong anti-clogging ability, but the pressure drop is small. The latter two can achieve larger pressure drop, but have the defects of complex structure and easy clogging. The problems of small inlet and outlet pressure drop, narrow adjustment range and relatively complex structure of magneto-rheological valve limit its further application. For the magneto-rheological valve with axial annular liquid flow channel, the traditional method to increase the inlet and outlet pressure drop is to increase the length of the liquid flow channel, which will lead to the increase of the volume of the magneto-rheological valve, limiting the application scene. In addition, the magnetic field utilization rate of the traditional single-coil structure magneto-rheological valve is low, which cannot fully play its role.

[0004] Based on this, the utility model provides a double-coil magneto-rheological valve with spiral liquid flow channel, which can obtain larger controllable pressure drop in smaller volume, compact structure and lower power. SUMMARY

[0005] In order to overcome the problems of the magnetorheological valve described in the background art and further meet the practical use requirements of the magnetorheological valve, the utility model provides a double-coil type magnetorheological valve with a spiral liquid flow channel. The magnetorheological valve gap fits the magnetic guide sleeve and the winding sleeve, and an axial annular liquid flow channel is formed between the two. A spiral baffle is arranged on the magnetic guide sleeve. The spiral baffle is in the shape of a cylindrical spiral with a certain spiral angle. The spiral baffle hinders the axial flow of the magnetorheological fluid. The magnetorheological fluid flows along the spiral baffle in a spiral manner, so that the axial annular liquid flow channel becomes a spiral liquid flow channel. The arrangement effectively lengthens the length of the liquid flow channel and effectively improves the pressure drop volume ratio of the magnetorheological valve without increasing the axial size. In addition, two groups of excitation coils with alternating polarities are uniformly arranged in the magnetorheological valve. The magnetic induction intensity between the two groups of excitation coils is strengthened by mutual superposition. A magnetic shielding ring is arranged in the middle of the two groups of excitation coils. The valve body, the winding sleeve and the magnetic guide sleeve are made of magnetic conductive material, and the valve core, the spiral baffle, the magnetic shielding ring and the left and right baffles are made of non-magnetic conductive material. When current is applied to the excitation coil, the magnetic lines of force generated by the excitation coil are twisted by the magnetic shielding ring, and pass through the entire spiral liquid flow channel vertically, so that a full-channel spiral effective damping gap is formed in the magnetorheological valve, and the utilization rate of the magnetic field is improved. Compared with the traditional magnetorheological valve, the valve has the advantages of simple structure, large output pressure drop, stable operation and less prone to blockage, and is more suitable for use in hydraulic control systems with wide pressure regulation range.

[0006] The utility model discloses a technical scheme that solves its technical problem includes: left end cover (1), valve body (2), left baffle (3), winding sleeve I (4), magnetic ring I (5), winding sleeve II (6), magnetic ring II (7), winding sleeve III (8), right end cover (9), right baffle (10), spiral baffle (11), excitation coil I (12), excitation coil II (13), magnetic conducting sleeve (14), valve core (15), spiral liquid flow channel (16), spiral liquid flow a channel (16a), spiral liquid flow b channel (16b), spiral liquid flow c channel (16c) and spiral liquid flow d channel (16d), and left end cover (1) and valve body (2) are fixedly connected through screw and are sealed through sealing washer, and the right side of left end cover (1) is tightly attached with the left side of left baffle (3), and the circumferential outer surface of left baffle (3) is interference fit with the circumferential inner surface of valve body (2) and is sealed through sealing washer, and the right side of left baffle (3) is tightly attached with the left side of winding sleeve I (4), and the circumferential outer surface of winding sleeve I (4) is interference fit with the circumferential inner surface of valve body (2), and the right end of winding sleeve I (4) is interference fit with the left end of magnetic ring I (5) and is fixedly connected through welding, and the right end of magnetic ring I (5) is interference fit with the left end of winding sleeve II (6) and is fixedly connected through welding, and the circumferential outer surface of winding sleeve II (6) is interference fit with the circumferential inner surface of valve body (2), and the right end of winding sleeve II (6) is interference fit with the left end of magnetic ring II (7) and is fixedly connected through welding, and the circumferential outer surface of winding sleeve II (6) is interference fit with the circumferential inner surface of valve body (2), and the right end of winding sleeve II (6) is interference fit with the left end of magnetic ring II (7) and is fixedly connected through welding, and the right end of magnetic ring II (7) is interference fit with the left end of winding sleeve III (8) and is fixedly connected through welding, and the circumferential outer surface of winding sleeve III (8) is interference fit with the circumferential inner surface of valve body (2), and the right side of winding sleeve III (8) is tightly attached with the left side of right baffle (10), and the circumferential outer surface of right baffle (10) is interference fit with the circumferential inner surface of valve body (2) and is sealed through sealing washer, and the right side of right baffle (10) is tightly attached with the left side of right end cover (9), and right end cover (9) and valve body (2) are fixedly connected through screw and are sealed through sealing washer, and the left side of valve core (15) is tightly attached with the right side of left baffle (3), and the right side of valve core (15) is tightly attached with the left side of right baffle (10), and the circumferential outer surface of valve core (15) is interference fit with the circumferential inner surface of magnetic conducting sleeve (14), and spiral baffle (11) is cylindrical spiral shape with certain spiral angle, and the circumferential inner surface of spiral baffle (11) is interference fit with the circumferential outer surface of magnetic conducting sleeve (14) and is fixedly connected through welding, and the circumferential outer surface of spiral baffle (11) is interference fit with the circumferential inner surface of winding sleeve I (4), magnetic ring I (5), winding sleeve II (6), magnetic ring II (7) and winding sleeve III (8), and magnetic conducting sleeve (14), spiral baffle (11) and winding sleeve I (4), magnetic ring I (5), winding sleeve II (6), magnetic ring II (7) and winding sleeve III (8) form spiral liquid flow channel (16) between.The excitation coil I (12) is wound clockwise in the grooves between the winding sleeve II (6), the magnetic isolation ring II (7) and the winding sleeve III (8), and the excitation coil II (13) is wound counterclockwise in the grooves between the winding sleeve I (4), the magnetic isolation ring I (5) and the winding sleeve II (6); the winding sleeve II (6) is processed with a lead groove, the lead wire of the excitation coil I (12) is connected with the excitation coil II (13) through the lead groove; the winding sleeve III (8) is processed with a lead groove, the right baffle (10) and the right end cover (9) are processed with lead holes, and the lead wire of the excitation coil I (12) and the excitation coil II (13) is led out through the lead groove and the lead hole.

[0007] Compared with the background art, the utility model has the beneficial effects that:

[0008] (1) The magnetorheological valve is provided with a spiral baffle in a traditional axial liquid flow channel, thereby forming a spiral liquid flow channel, the length of the liquid flow channel is prolonged without increasing the axial length of the valve core, and the pressure drop volume ratio of the magnetorheological valve is effectively improved.

[0009] (2) The magnetorheological valve is arranged with two groups of excitation coils with alternating polarities, the magnetic force line directions of the two groups of excitation coils are the same, and the magnetic induction intensities are superposed on each other. The two excitation coils are both provided with magnetic isolation rings, the magnetic force lines generated by the excitation coils are twisted under the action of the magnetic isolation rings, pass through the whole spiral liquid flow channel vertically, the spiral full-channel effective damping gap is formed in the magnetorheological valve, and the utilization rate of the magnetic field is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the structural schematic view of the utility model.

[0011] Figure 2 is the liquid flow channel schematic view of the utility model.

[0012] Figure 3 is the three-dimensional structure schematic view of the spiral baffle and the magnetic sleeve of the utility model.

[0013] Figure 4 is the excitation coil magnetic force line distribution schematic view of the utility model.

[0014] Figure 5 is the right baffle structure schematic view of the utility model. DETAILED DESCRIPTION

[0015] The utility model will be further described in connection with the drawings and embodiments:

[0016] For example, Figure 1As shown, the utility model of end cover (1), valve body (2), left baffle (3), winding sleeve I (4), magnetic ring I (5), winding sleeve II (6), magnetic ring II (7), winding sleeve III (8), right end cover (9), right baffle (10), spiral baffle (11), excitation coil I (12), excitation coil II (13), magnetic sleeve (14), valve core (15), spiral liquid flow channel (16), spiral liquid flow a channel (16a), spiral liquid flow b channel (16b), spiral liquid flow c channel (16c) and spiral liquid flow d channel (16d) are included. The wire of excitation coil I (12) is connected with excitation coil II (13) through the lead groove on winding sleeve II (6), and the wire of excitation coil I (12) and excitation coil II (13) is led out through the lead hole of right baffle (10) and the lead hole of right end cover (9).

[0017] As Figure 2 The utility model discloses a liquid flow channel schematic diagram. Magnetic sleeve (14), spiral baffle (11) and winding sleeve I (4), magnetic ring I (5), winding sleeve II (6), magnetic ring II (7) and winding sleeve III (8) form spiral liquid flow channel (16). Magnetorheological fluid can flow in through the inlet on left end cover (1), pass through spiral liquid flow channel (16) and flow out through the outlet on right end cover (9).

[0018] As Figure 3 The utility model discloses a spiral baffle and magnetic sleeve three-dimensional structure schematic diagram. Spiral baffle (11) is the cylindrical spiral of having certain spiral angle, and the circumferential inner surface of spiral baffle (11) is in interference fit with the circumferential outer surface of magnetic sleeve (14) and is fixedly connected through welding. Spiral baffle (11) hinders magnetorheological fluid to carry out axial flow, and magnetorheological fluid carries out spiral flow along spiral baffle in spiral liquid flow channel (16), forms four liquid flow channels of spiral liquid flow a channel (16a), spiral liquid flow b channel (16b), spiral liquid flow c channel (16c) and spiral liquid flow d channel (16d).

[0019] As Figure 4The diagram shows the distribution of magnetic field lines of the excitation coil of this utility model. The valve body (2), winding sleeve I (4), winding sleeve II (6), winding sleeve III (8) and magnetic sleeve (14) are all made of magnetic materials, while the valve core (15), magnetic isolation ring I (5), magnetic isolation ring II (7), left baffle (3), right baffle (10) and spiral baffle (10) are all made of non-magnetic materials. The magnetic field lines generated by the excitation coil I (12) pass through the valve body (2), winding cylinder II (6), spiral liquid flow channel (16), magnetic sleeve (14) and winding cylinder III (8) in sequence, and return to the valve body (2) to form a closed loop; the magnetic field lines generated by the excitation coil II (13) pass through the valve body (2), winding cylinder II (6), spiral liquid flow channel (16), magnetic sleeve (14) and winding cylinder I (4) in sequence, and return to the valve body (2) to form a closed loop. Excitation coil I (12) and excitation coil II (13) are arranged with alternating polarities, and the magnetic field lines between them are in the same direction, and the magnetic induction intensities are superimposed.

[0020] like Figure 5 The diagram shows the structure of the right baffle of this utility model. Four waist-shaped holes are uniformly machined on the right baffle (10). The magnetorheological fluid flows through the waist-shaped holes on the right baffle (10) to reach the outlet. The left baffle (3) has a similar structure to the right baffle (10) and is also uniformly machined with four waist-shaped holes. The magnetorheological fluid flows through the waist-shaped holes on the left baffle (3) and enters the spiral fluid flow channel (16). A lead wire hole is machined on one side of the right baffle (10). The wires of the excitation coil I (12) and the excitation coil II (13) are led out through the lead wire hole.

[0021] The working principle of this utility model is as follows:

[0022] The magnetorheological fluid flows into the magnetorheological valve through the inlet at the left end cap (1), enters the spiral flow channel (16) through the oblong hole on the left baffle (3), flows out through the oblong hole on the right baffle (10), and then flows out of the magnetorheological valve through the outlet at the right end cap (9). When current is applied to excitation coil I (12) and excitation coil II (13), the magnetic lines of force generated by the electromagnetic effect will pass perpendicularly through the spiral flow channel (16). The shear stress of the magnetorheological fluid in the spiral flow channel (16) changes accordingly under the action of the magnetic field, causing the magnetorheological valve to generate inlet and outlet pressure drops. By adjusting the magnitude of the current applied to excitation coil I (12) and excitation coil II (13), the inlet and outlet pressure drops of the magnetorheological valve can be adjusted to achieve continuous and controllable pressure drops.

Claims

1. A double-coil magneto-rheological valve with helical fluid flow channels, characterized in that Comprising: The left end cover (1), the valve body (2), the left baffle (3), the winding sleeve I (4), the magnetic isolation ring I (5), the winding sleeve II (6), the magnetic isolation ring II (7), the winding sleeve III (8), the right end cover (9), the right baffle (10), the spiral baffle (11), the excitation coil I (12), the excitation coil II (13), the magnetic conducting sleeve (14), the valve core (15), the spiral liquid flow channel (16), the spiral liquid flow a channel (16a), the spiral liquid flow b channel (16b), the spiral liquid flow c channel (16c) and the spiral liquid flow d channel (16d); the left end cover (1) and the valve body (2) are fixedly connected through screws and sealed through a sealing ring; the right side of the left end cover (1) is tightly attached to the left side of the left baffle (3); the circumferential outer surface of the left baffle (3) is interference-fitted with the circumferential inner surface of the valve body (2) and sealed through a sealing ring; the right side of the left baffle (3) is tightly attached to the left side of the winding sleeve I (4); the circumferential outer surface of the winding sleeve I (4) is interference-fitted with the circumferential inner surface of the valve body (2); the right end of the winding sleeve I (4) is interference-fitted with the left end of the magnetic isolation ring I (5) and fixedly connected through welding; the right end of the magnetic isolation ring I (5) is interference-fitted with the left end of the winding sleeve II (6) and fixedly connected through welding; the circumferential outer surface of the winding sleeve II (6) is interference-fitted with the circumferential inner surface of the valve body (2); the right end of the winding sleeve II (6) is interference-fitted with the left end of the magnetic isolation ring II (7) and fixedly connected through welding; the right end of the magnetic isolation ring II (7) is interference-fitted with the left end of the winding sleeve III (8) and fixedly connected through welding; the circumferential outer surface of the winding sleeve III (8) is interference-fitted with the circumferential inner surface of the valve body (2); the right side of the winding sleeve III (8) is tightly attached to the left side of the right baffle (10); the circumferential outer surface of the right baffle (10) is interference-fitted with the circumferential inner surface of the valve body (2) and sealed through a sealing ring; the right side of the right baffle (10) is tightly attached to the left side of the right end cover (9); the right end cover (9) and the valve body (2) are fixedly connected through screws and sealed through a sealing ring; the left side of the valve core (15) is tightly attached to the right side of the left baffle (3) and the right side of the valve core (15) is tightly attached to the left side of the right baffle (10); the circumferential outer surface of the valve core (15) is interference-fitted with the circumferential inner surface of the magnetic conducting sleeve (14); the spiral baffle (11) is a cylindrical spiral with a certain spiral angle; the circumferential inner surface of the spiral baffle (11) is interference-fitted with the circumferential outer surface of the magnetic conducting sleeve (14) and fixedly connected through welding; the circumferential outer surface of the spiral baffle (11) is interference-fitted with the circumferential inner surfaces of the winding sleeve I (4), the magnetic isolation ring I (5), the winding sleeve II (6), the magnetic isolation ring II (7) and the winding sleeve III (8); the magnetic conducting sleeve (14), the spiral baffle (11) and the winding sleeve I (4), the magnetic isolation ring I (5), the winding sleeve II (6), the magnetic isolation ring II (7) and the winding sleeve III (8) form the spiral liquid flow channel (16);The exciting coil I (12) is wound clockwise in the recess between the winding sleeve II (6), the magnetic isolation ring II (7) and the winding sleeve III (8), and the exciting coil II (13) is wound counterclockwise in the recess between the winding sleeve I (4), the magnetic isolation ring I (5) and the winding sleeve II (6); the winding sleeve II (6) is processed with a lead groove, the lead wire of the exciting coil I (12) is connected with the exciting coil II (13) through the lead groove; the winding sleeve III (8) is processed with a lead groove, the right baffle (10) and the right end cover (9) are processed with a lead hole, and the lead wire of the exciting coil I (12) and the exciting coil II (13) is led out through the lead groove and the lead hole.

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