CN102374330A - Magnetorheological valve - Google Patents

Abstract

The invention relates to a magneto-rheological valve, which belongs to the technical field of hydraulic transmission. It includes a left valve joint, a left support flow plate, a valve body, a coil, a valve core, an iron core, a right support flow plate and a right valve joint. The coil is wound on the iron core, the iron core is put into the valve body, the valve core is put into the hole of the iron core, and a working gap is formed between the valve core and the iron core. The two ends of the spool are respectively supported and fixed by the left support flow plate and the right support flow plate, the left support flow plate and the right support flow plate are installed in the left valve joint and the right valve joint respectively, the left valve joint and the right valve joint fixed on the valve body. The magneto-rheological valve adopts a symmetrical structure design, which is convenient for connection at both ends. No moving parts, simple structure, small volume and low cost. The valve body, valve core and iron core are made of high magnetic permeability materials to improve the magnetic permeability. The support flow plate and valve joints are made of non-magnetic materials to reduce magnetic flux leakage and improve the utilization rate of magnetic field energy. The magneto-rheological valve has a wide range of pressure regulation, fast response and high reliability.

Description

A magnetorheological valve

technical field

The invention relates to a magneto-rheological valve, which belongs to the technical field of hydraulic transmission.

Background technique

Magneto-rheological fluid is a kind of smart material. When it is not affected by a magnetic field, it presents a Newtonian fluid state and can flow freely. Under the action of an external magnetic field, its structure and properties will undergo peculiar changes, and it can be transformed from a liquid with a good flow state into a solid state in an instant, and its viscosity will increase by several orders of magnitude in a very short time, showing a viscous Plastic fluid, and exhibits a certain shear yield stress, which increases with the increase of the applied magnetic field strength. After the magnetic field is removed, the magnetorheological fluid changes from solid to liquid again, which is continuous, reversible and controllable. The magnetorheological valve designed according to the magnetorheological characteristics of magnetorheological fluid can realize continuous, stepless and intelligent control of pressure and flow by adjusting the magnitude of the current in the coil. The key to the performance of magneto-rheological valves lies in the position and structure of the working gap. At present, the structure of the magneto-rheological valve mainly includes: the working gap is designed between the valve body and the coil (external), the working gap is designed between the valve core and the coil (built-in), and the working gap is designed to be both disc-shaped and Torus. The design of the working gap of these three kinds of magnetorheological valves only considers the vertical magnetic line segment of the magnetorheological fluid, and the effect of the magnetic field on the magnetorheological fluid, and does not consider the parallel magnetic force line segment of the magnetorheological fluid, and the effect of the magnetic field on the magnetorheological fluid. , The damping force produced by the magnetorheological valve is small, and the pressure adjustment range is narrow, so it can only be used in low-pressure systems, which limits the development and application of the magnetorheological valve.

Contents of the invention

The purpose of the present invention is to provide a magnetorheological valve, the magnetorheological valve design the working gap between the valve core and the iron core, increase the magnetic induction of the magnetorheological fluid in the entire working gap, improve the magnetorheological valve Damping force and performance, realize the continuous, stepless and intelligent adjustment of magnetorheological valve pressure and flow through electrical signals.

The technical solution of the present invention is: a magneto-rheological valve, including a left valve joint 1, a left sealing ring 2, a left support flow plate 3, a valve body 4, a coil 5, a valve core 6, an iron core 8, a right support flow plate Flow plate 9, right sealing ring 10, right valve joint 11. The coil 5 is wound on the iron core 8 , the iron core 8 is loaded into the valve body 4 through a transition fit, the valve core 6 is loaded into the hole of the iron core 8 , and a working gap 7 is formed between the valve core 6 and the iron core 8 . The width of the working gap 7 is 0.1mm~3mm, and the length is 8mm~200mm. The size of the working gap 7 is selected and determined within a given range according to the strength of the magnetic field, the properties of the magnetorheological fluid and actual needs. The two ends of the spool 6 are respectively supported and axially fixed by the left support flow plate 3 and the right support flow plate 9, and the left support flow plate 3 and the right support flow plate 9 are respectively installed into the left valve joint 1 and the Among the right valve joints 11, the left valve joint 1 and the right valve joint 11 are fixed on the valve body 4 by means of threaded connection or welding. The left sealing ring 2 and the right sealing ring 10 are respectively housed in the sealing grooves of the left valve joint 1 and the right valve joint 11, so as to realize the sealing of the left and right joints. The left and right valve joints of the magnetorheological valve can be made into pipe-type threaded connection or flange connection, and the connection of the magnetorheological valve can also be made into plate-type connection. The maximum working pressure of the magnetorheological valve is 30MPa, and the maximum flow rate is 4000L/min.

When working, the coil of the magnetorheological valve is energized, and a magnetic field is formed around the working gap. The magnetorheological fluid flowing through the working gap generates magnetic induction under the action of the magnetic field, which increases the viscosity of the magnetorheological fluid and increases the flow damping force. , The inlet and outlet of the magnetorheological valve form a certain flow resistance pressure difference, and the flow rate decreases accordingly. Adjusting the current can adjust the yield stress of the magnetorheological fluid and change the damping force of the magnetorheological valve. When the damping force of the magnetorheological valve reaches a certain value, the magnetorheological fluid is prevented from passing through and the flow rate is zero. When the working pressure of the system is higher than the damping force of the magnetorheological valve, the magnetorheological fluid can pass through the magnetorheological valve. When the coil of the magnetorheological valve is not energized, the pressure difference between the inlet and outlet of the magnetorheological valve is the smallest, and the flow rate of the magnetorheological fluid flowing through the working gap is the largest. According to the needs of the system, the resistance of the magnetorheological valve can be changed by changing the working gap and the gap length of the magnetorheological valve under the condition of a certain electromagnetic field strength. When the working gap and gap length of the magnetorheological valve are fixed, the magnitude of the current signal can be changed to change the resistance of the magnetorheological valve. In addition, the damping force of the magneto-rheological valve can be controlled by electric signals, so as to realize the continuous, stepless and intelligent control of the pressure and flow of the magneto-rheological valve.

The beneficial effects of the present invention are:

(1) The working medium is magnetorheological fluid of micron or nanometer scale.

(2) The working gap is designed between the iron core and the valve core, which can improve the utilization rate of magnetic energy, increase the magnetic induction intensity of the magnetorheological fluid, increase the damping force of the magnetorheological valve, and improve the performance of the magnetorheological valve.

(3) The magnitude of the magnetic field strength of the magnetorheological valve is adjusted by the magnitude of the current signal, which facilitates the continuous, stepless and intelligent control of the pressure and flow of the magnetorheological valve.

(4) The magneto-rheological valve adopts a symmetrical structure design, which is convenient for connection at both ends. No moving parts, simple structure, small volume and low cost.

(5) The valve body, valve core and iron core are made of high magnetic permeability materials to improve the magnetic permeability. The support flow plate and valve joints are made of non-magnetic materials to reduce magnetic flux leakage and improve the utilization rate of magnetic field energy.

(6) The magneto-rheological valve has a wide range of pressure adjustment, fast response and high reliability.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the left sectional view of the present invention;

The labels in the figure are: 1: left valve joint, 2: left sealing ring, 3: left support overflow plate, 4: valve body, 5: coil, 6: valve core, 7: working gap, 8: iron core, 9: Right support overflow plate, 10: Right sealing ring, 11: Right valve joint.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the content of the present invention is not limited to the stated scope.

Embodiment 1: As shown in Figure 1-2, a magneto-rheological valve includes a left valve joint 1, a left sealing ring 2, a left support overflow plate 3, a valve body 4, a coil 5, a valve core 6, and a working gap 7. Iron core 8, right support overflow plate 9, right sealing ring 10, right valve joint 11. The coil 5 is wound on the iron core 8 , the iron core 8 is loaded into the valve body 4 through a transition fit, the valve core 6 is loaded into the hole of the iron core 8 , and a working gap 7 is formed between the valve core 6 and the iron core 8 . The working gap 7 has a width of 0.1 mm and a length of 8 mm. The two ends of the spool 6 are respectively supported and axially fixed by the left support flow plate 3 and the right support flow plate 9, and the left support flow plate 3 and the right support flow plate 9 are respectively installed into the left valve joint 1 and the Among the right valve joints 11, the left valve joint 1 and the right valve joint 11 are fixed on the valve body 4 through threaded connection. The left sealing ring 2 and the right sealing ring 10 are respectively housed in the sealing grooves of the left valve joint 1 and the right valve joint 11, so as to realize the sealing of the left and right joints. The maximum working pressure of the magnetorheological valve is 30MPa, and the maximum flow rate is 4000L/min.

Embodiment 2: As shown in Figure 1-2, a magnetorheological valve includes a left valve joint 1, a left sealing ring 2, a left support overflow plate 3, a valve body 4, a coil 5, a valve core 6, and a working gap 7. Iron core 8, right support overflow plate 9, right sealing ring 10, right valve joint 11. The coil 5 is wound on the iron core 8 , the iron core 8 is loaded into the valve body 4 through a transition fit, the valve core 6 is loaded into the hole of the iron core 8 , and a working gap 7 is formed between the valve core 6 and the iron core 8 . The working gap 7 has a width of 3 mm and a length of 200 mm. The two ends of the spool 6 are respectively supported and axially fixed by the left support flow plate 3 and the right support flow plate 9, and the left support flow plate 3 and the right support flow plate 9 are respectively installed into the left valve joint 1 and the Among the right valve joints 11, the left valve joint 1 and the right valve joint 11 are fixed on the valve body 4 by welding. The left sealing ring 2 and the right sealing ring 10 are respectively housed in the sealing grooves of the left valve joint 1 and the right valve joint 11, so as to realize the sealing of the left and right joints. The left and right valve joints of the magnetorheological valve are made of pipe-type threaded connections, and the connections of the magnetorheological valves are made of plate-type connections. The minimum working pressure of the magnetorheological valve is 1MPa, and the maximum flow rate is 4000L/min.

Embodiment 3: As shown in Figure 1-2, a magnetorheological valve includes a left valve joint 1, a left sealing ring 2, a left support overflow plate 3, a valve body 4, a coil 5, a valve core 6, and a working gap 7. Iron core 8, right support overflow plate 9, right sealing ring 10, right valve joint 11. The coil 5 is wound on the iron core 8 , the iron core 8 is loaded into the valve body 4 through a transition fit, the valve core 6 is loaded into the hole of the iron core 8 , and a working gap 7 is formed between the valve core 6 and the iron core 8 . The working gap 7 has a width of 1.3 mm and a length of 28 mm. The two ends of the spool 6 are respectively supported and axially fixed by the left support flow plate 3 and the right support flow plate 9, and the left support flow plate 3 and the right support flow plate 9 are respectively installed into the left valve joint 1 and the Among the right valve joints 11, the left valve joint 1 and the right valve joint 11 are fixed on the valve body 4 through threaded connection. The left sealing ring 2 and the right sealing ring 10 are respectively housed in the sealing grooves of the left valve joint 1 and the right valve joint 11, so as to realize the sealing of the left and right joints. The left and right valve joints of the magnetorheological valve are made into flange connections, and the connections of the magnetorheological valves are made into plate connections. The working pressure of the magnetorheological valve is 15MPa, and the maximum flow rate is 4000L/min.

Embodiment 4: As shown in Figure 1-2, a magneto-rheological valve includes a left valve joint 1, a left sealing ring 2, a left support overflow plate 3, a valve body 4, a coil 5, a valve core 6, and a working gap 7. Iron core 8, right support overflow plate 9, right sealing ring 10, right valve joint 11. The coil 5 is wound on the iron core 8 , the iron core 8 is loaded into the valve body 4 through a transition fit, the valve core 6 is loaded into the hole of the iron core 8 , and a working gap 7 is formed between the valve core 6 and the iron core 8 . The working gap 7 has a width of 1.5 mm and a length of 76 mm. The two ends of the spool 6 are respectively supported and axially fixed by the left support flow plate 3 and the right support flow plate 9, and the left support flow plate 3 and the right support flow plate 9 are respectively installed into the left valve joint 1 and the Among the right valve joints 11, the left valve joint 1 and the right valve joint 11 are fixed on the valve body 4 through threaded connection. The left sealing ring 2 and the right sealing ring 10 are respectively housed in the sealing grooves of the left valve joint 1 and the right valve joint 11, so as to realize the sealing of the left and right joints. The left and right valve joints of the magnetorheological valve are made into flange connections, and the connections of the magnetorheological valves are made into plate connections. The working pressure of the magnetorheological valve is 18MPa, and the maximum flow rate is 4000L/min.

Claims (5)

1. a magnetic rheological valve comprises left valve joint (1), left side supporting overcurrent plate (3), valve body (4), coil (5), spool (6), iron core (8), right supporting overcurrent plate (9), right valve joint (11); It is characterized in that: coil (5) is wrapped on the iron core (8); Iron core (8) is packed in the valve body (4); Spool (6) is packed in the hole of iron core (8); Form the working clearance (7) between spool (6) and the iron core (8); Spool (6) two ends are fixing by left side supporting overcurrent plate (3) and right supporting overcurrent plate (9) supporting respectively, and left side supporting overcurrent plate (3) and right supporting overcurrent plate (9) are respectively charged in left valve joint (1) and the right valve joint (11), and left valve joint (1) and right valve joint (11) are fixed on the valve body (4).

2. according to claim 1 described magnetic rheological valve, it is characterized in that: the working clearance (7) that forms between said spool (6) and the iron core (8) is 0.1mm ~ 3mm.

3. according to claim 1 described magnetic rheological valve, it is characterized in that: working clearance (7) length that forms between said spool (6) and the iron core (8) is 8mm ~ 200mm.

4. according to claim 1 described magnetic rheological valve, it is characterized in that: left seal ring (2) and right seal ring (10) are housed respectively in the seal groove of said left valve joint (1) and right valve joint (11).

5. according to claim 1 described magnetic rheological valve, it is characterized in that: the maximum service pressure of said magnetic rheological valve is 30MPa, and peak rate of flow is 4000L/min.

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