Damping gap adjustable polygonal flow channel magneto-rheological valve

Abstract

The application discloses a polygonal flow channel magnetorheological valve with adjustable damping gap, which is mainly composed of a left end cover, a polygonal core shaft, a left magnetic guide block, an excitation coil, a magnetic isolation ring, a valve body, a right magnetic guide block and a right end cover. The polygonal inner surface of the left magnetic guide block and the outer surface of the polygonal core shaft form an effective damping gap A; the polygonal inner surface of the right magnetic guide block and the outer surface of the polygonal core shaft form an effective damping gap B. When the excitation coil is supplied with current, a magnetic field perpendicular to the liquid flow direction is formed in the effective damping gap A and the effective damping gap B, and the magnetic field size can be adjusted by changing the current size or rotating the polygonal core shaft angle, so as to change the inlet and outlet pressure difference of the magnetorheological valve. The application has various adjustment modes of the inlet and outlet pressure difference of the magnetorheological valve, can effectively increase the pressure regulation range, and is especially suitable for being applied to a hydraulic control system with wide pressure regulation range requirement.

Description

Technical Field

[0001] This invention relates to a magnetorheological valve, and more particularly to a polygonal flow channel magnetorheological valve with adjustable damping gap. Background Technology

[0002] A magnetorheological valve is a novel type of hydraulic control valve that uses magnetorheological fluid as its working medium. Magnetorheological fluid is an intelligent fluid that, under the influence of a magnetic field, can instantly transform from a freely flowing Newtonian fluid into a viscoplastic body with a certain shear yield strength, and then revert to a freely flowing Newtonian fluid after the magnetic field is removed. The pressure and flow rate of the magnetorheological valve can be controlled by adjusting the applied current. Compared with traditional hydraulic control valves, it has a simpler structure, lower processing cost, faster response speed, lower noise, lower energy consumption, and more stable and reliable operation, showing promising application prospects.

[0003] Currently, common structures for magnetorheological valves include: axial annular damping gap, radial disc damping gap, and a hybrid annular and disc damping gap. These three types of magnetorheological valves have fixed damping gap thickness, small pressure differentials between the valve inlet and outlet, narrow pressure regulation range, and a single regulation method, limiting their application to low-pressure systems and hindering their general application.

[0004] Based on this, the present invention proposes a polygonal flow channel magnetorheological valve with adjustable damping gap, which can adjust the inlet and outlet pressure difference of the magnetorheological valve by rotating the polygonal mandrel to change the damping gap thickness or controlling the excitation current. Summary of the Invention

[0005] To overcome the shortcomings of the magnetorheological valves described in the background art and meet engineering application requirements, this invention proposes a polygonal flow channel magnetorheological valve with adjustable damping gap. The polygonal inner surface of the left magnetic guide block and the outer surface of the polygonal mandrel form an effective damping gap A; the polygonal inner surface of the right magnetic guide block and the outer surface of the polygonal mandrel form an effective damping gap B. The left magnetic guide block, valve body, right magnetic guide block, effective damping gap B, polygonal mandrel, and effective damping gap A form a closed magnetic field loop. Under the excitation of the excitation current, a magnetic field perpendicular to the fluid flow direction is formed within effective damping gaps A and B. By changing the magnitude of the excitation current or rotating the polygonal mandrel to adjust the thickness of effective damping gaps A and B, the magnetic field strength within effective damping gaps A and B can be changed, thereby adjusting the pressure difference between the inlet and outlet of the magnetorheological valve. The inlet and outlet pressure difference can be adjusted in various ways, effectively increasing the pressure regulation range of the magnetorheological valve.

[0006] The technical solution adopted by the present invention to solve its technical problem includes: a left end cover (1), a sealing ring I (2), a sealing ring II (3), a polygonal mandrel (4), a left magnetic guide block (5), an excitation coil (6), a magnetic isolation ring (7), a valve body (8), a right magnetic guide block (9), a sealing ring III (10), a sealing ring IV (11), and a right end cover (12); the left end of the polygonal mandrel (4) passes through the center hole of the left end cover (1) and is sealed by the sealing ring I (2); the left end cover (1) and the valve body (8) are fixedly connected by screws, and the left end cover (1) and the valve body (8) are sealed by the sealing ring II (3); the left magnetic guide block (5) and the magnetic isolation ring (7) are interference-fitted, and the left end face of the left magnetic guide block (5) is in close contact with the left end cover (1); the right magnetic guide block (9) and the magnetic isolation ring (7) are interference-fitted, and the right end face of the right magnetic guide block (9) is in close contact with the left end cover (1). The right end cover (12) forms a winding groove with the left magnetic guide block (5), the magnetic isolation ring (7) and the right magnetic guide block (9). The excitation coil (6) is wound in the winding groove and its lead wire is led out through the lead wire hole of the valve body (8). The right end of the polygonal mandrel (4) is inserted into the center hole of the right end cover (12) and sealed by the sealing ring III (10). The right end cover (12) and the valve body (8) are fixedly connected by screws and sealed by the sealing ring IV (11). The polygonal inner surface of the left magnetic guide block (5) and the outer surface of the polygonal mandrel (4) form an effective damping gap A. The polygonal inner surface of the right magnetic guide block (9) and the outer surface of the polygonal mandrel (4) form an effective damping gap B. The magnetorheological fluid flows through the small hole on the left end cover (1), the effective damping gap A, the effective damping gap B and the small hole on the right end cover (12) in sequence, forming the fluid flow channel C of the magnetorheological valve.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] (1) The magnetorheological valve of the present invention comprises a left magnetic guide block, a valve body, a right magnetic guide block, an effective damping gap B, a polygonal mandrel, and an effective damping gap A, which form a closed magnetic field loop. Under the excitation of the excitation current, a magnetic field perpendicular to the liquid flow direction is formed in the effective damping gap A and the effective damping gap B.

[0009] (2) The magnetorheological valve of the present invention can adjust the magnetic field strength within the effective damping gaps A and B by changing the magnitude of the excitation current or by rotating the polygonal mandrel to adjust the thickness of the effective damping gaps A and B, thereby adjusting the pressure difference between the inlet and outlet of the magnetorheological valve. Its inlet and outlet pressure difference adjustment methods are diverse, effectively increasing the pressure regulation range of the magnetorheological valve. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention.

[0011] Figure 2 This is an isometric view of the polygonal mandrel of the present invention.

[0012] Figure 3 This is a cross-sectional view of the flow channel when the polygonal mandrel of the present invention is parallel to the left guide magnetic block.

[0013] Figure 4 This is a cross-sectional view of the flow channel when the polygonal mandrel and the left guide magnetic block of the present invention are misaligned. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 The diagram shows the structure of the present invention. The present invention includes a left end cap (1), a sealing ring I (2), a sealing ring II (3), a polygonal mandrel (4), a left magnetic guide block (5), an excitation coil (6), a magnetic shielding ring (7), a valve body (8), a right magnetic guide block (9), a sealing ring III (10), a sealing ring IV (11), and a right end cap (12). The polygonal inner surface of the left magnetic guide block (5) and the polygonal outer surface of the polygonal mandrel (4) form an effective damping gap A; the polygonal inner surface of the right magnetic guide block (9) and the polygonal outer surface of the polygonal mandrel (4) form an effective damping gap B.

[0016] Figure 2 This is an isometric view of the polygonal valve core of the present invention. The outer surface contour of the middle part of the polygonal core is polygonal in shape.

[0017] Figure 3 This is a cross-sectional view of the flow channel when the polygonal mandrel of the present invention is parallel to the left guide magnetic block. The flow channel shape is as follows when the polygonal inner surface of the left guide magnetic block (5) is parallel to the polygonal outer surface of the polygonal mandrel (4).

[0018] Figure 4 This is a cross-sectional view of the flow channel when the polygonal mandrel and the left guide magnetic block are misaligned. The flow channel shape is as follows when the polygonal inner surface of the left guide magnetic block (5) is misaligned with the polygonal outer surface of the polygonal mandrel (4).

[0019] The working principle of this invention is as follows:

[0020] The polygonal inner surface of the left magnetic guide block and the outer surface of the polygonal mandrel form an effective damping gap A; the polygonal inner surface of the right magnetic guide block and the outer surface of the polygonal mandrel form an effective damping gap B. The left magnetic guide block, valve body, right magnetic guide block, effective damping gap B, polygonal mandrel, and effective damping gap A form a closed magnetic field loop. Under the excitation of the excitation current, a magnetic field perpendicular to the fluid flow direction is formed within effective damping gaps A and B. By changing the magnitude of the excitation current or rotating the polygonal mandrel to adjust the thickness of effective damping gaps A and B, the magnetic field strength within effective damping gaps A and B can be changed, thereby adjusting the inlet and outlet pressure difference of the magnetorheological valve. The inlet and outlet pressure difference can be adjusted in various ways, effectively increasing the pressure regulation range of the magnetorheological valve.

Claims

1. A polygonal flow channel magnetorheological valve with adjustable damping gap, characterized in that... include: Left end cover (1), sealing ring I (2), sealing ring II (3), polygonal mandrel (4), left magnetic guide block (5), excitation coil (6), magnetic isolation ring (7), valve body (8), right magnetic guide block (9), sealing ring III (10), sealing ring IV (11), right end cover (12); the left end of the polygonal mandrel (4) passes through the center hole of the left end cover (1) and is sealed by sealing ring I (2); the left end cover (1) and the valve body (8) are fixedly connected by screws, and the left end cover (1) and the valve body (8) are sealed by sealing ring II (3); the left magnetic guide block (5) and the magnetic isolation ring (7) are interference fit, and the left end face of the left magnetic guide block (5) is close to the left end cover (1); the right magnetic guide block (9) The right magnetic block (9) is press-fitted with the magnetic isolation ring (7), and the right end face of the right magnetic block (9) is in close contact with the right end cover (12); the left magnetic block (5), the magnetic isolation ring (7) and the right magnetic block (9) form a winding groove, and the excitation coil (6) is wound in the winding groove, and its lead wire is led out through the lead wire hole of the valve body (8); the right end of the polygonal mandrel (4) is inserted into the center hole of the right end cover (12) and sealed by the sealing ring III (10), and the center hole of the right end cover (12) is a non-penetrating concave hole; the right end cover (12) and the valve body (8) are fixedly connected by screws and sealed by the sealing ring IV (11); the polygonal inner surface of the left magnetic block (5) and the outer surface of the polygonal mandrel (4) form a polygonal effective damping gap A; The polygonal inner surface of the right magnetic block (9) and the outer surface of the polygonal mandrel (4) form a polygonal effective damping gap B; the polygonal mandrel (4) can rotate around the axis to change the shape and thickness of the effective damping gap A and the effective damping gap B.

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