CN115535022B - Intensive intelligent deceleration roof based on magnetorheological technology and its control method - Google Patents

Abstract

The invention discloses an intensive intelligent deceleration roof based on magnetorheological technology and a control method thereof. The intensive intelligent deceleration top includes a housing and a brake cylinder; the brake cylinder includes a cylinder barrel and a piston head that can be installed in the cylinder barrel up and down. The cylinder barrel is divided into two cavities by the piston head, corresponding to the piston head located on the piston head. The upper chamber above and the lower chamber located below the piston head; the piston head has a number of magnetorheological blocking channels evenly distributed around its axis with its own axis as the center, and an excitation coil is installed in the piston head; the upper chamber and the lower chamber of the cylinder barrel The cavities are connected through the magnetorheological blocking channel, and the upper chamber of the cylinder and the magnetorheological blocking channel are both filled with magnetorheological fluid. It can be seen that the present invention uses magnetorheological fluid as an energy-consuming material and can output appropriate braking power and braking power in real time for intelligent magnetorheological deceleration under various types of railway vehicles (including various weights and speeds). Resistance function enables intelligent deceleration and critical speed to be adjusted and controllable in real time.

Description

Intensive intelligent deceleration roof based on magnetorheological technology and its control method

Technical field

The invention relates to an intensive intelligent deceleration roof and a control method thereof, in particular to an intensive intelligent deceleration roof based on magnetorheological technology and a control method thereof.

Background technique

The railway marshalling speed regulation system needs to control and adjust the rolling speed of various types of rolling stock. The deceleration jack is a commonly used deceleration and speed regulation device for the sliding speed of railway vehicles. Conventional deceleration jacks use hydraulic oil consumption to decelerate. Conventional deceleration jacks include three valves: speed valve, pressure valve and return valve. Hydraulic oil consumes power through the pressure valve, which is the key mechanism of the deceleration jack. The vehicle wheel rolls over the cylinder cap head, and the cylinder cap head goes down, forcing the hydraulic oil to pass through the piston hole or the pressure valve ball valve gap at a certain speed. When the speed is less than the critical speed, the speed valve opens, and the hydraulic oil enters the lower chamber through the speed valve. The deceleration jack does no work; when the speed is greater than the critical speed, the speed valve is closed, the hydraulic oil enters the lower chamber through the pressure valve, and the deceleration jack does work. When the vehicle wheels leave the deceleration top, the hydraulic oil passes through the return valve from the lower cavity and flows back into the upper cavity of the deceleration top. At this time, the deceleration jack completes the deceleration work.

Conventional deceleration tops, such as Chinese patent CN112406941A, require not only three valves (speed valve, pressure valve and return valve) for normal operation, but also multiple sets of springs of different sizes to provide the necessary spring reaction force. Factors such as the large number of parts and the heavy maintenance workload of conventional deceleration roofs result in high maintenance costs for conventional deceleration roofs, which restricts the operating efficiency of hump marshalling. The speed valve of a conventional deceleration top is composed of a speed valve plate, a spring and a pressure valve seat. The critical speed of the deceleration top is determined by the speed valve plate model and spring stiffness. Once the mechanical structure is installed and finalized, the critical speed of the deceleration top is determined. . This means that once the speed reducer is assembled, only one critical speed can be determined. In addition, conventional deceleration roofs have many parts and different life cycles, resulting in a waste of resources; conventional deceleration roofs can only provide a constant critical speed (speed valve) and hydraulic oil return speed (return valve). Under complex conditions such as changes in speed and wheel spacing, it is difficult to ensure that different vehicles have different requirements for the return time of the cylinder cap head and the "safe lifting height" of the wheels, which reduces the operating efficiency and safety performance of the hump, and cannot be well adapted to modern large-scale Hump job.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides an intensive intelligent deceleration jack based on magnetorheological technology, which uses magnetorheological fluid as an energy-consuming material and can provide intelligent magnetorheological deceleration jacks for various types of railways. Appropriate braking work and resistance work are output in real time under the working conditions of the vehicle (including various weights and speeds), and the critical speed of the intelligent deceleration top is adjustable and controllable in real time.

In order to achieve the above technical objectives, the present invention will adopt the following technical solutions:

An intensive intelligent deceleration roof based on magnetorheological technology, including a housing and a brake cylinder whose lower end is inserted into the housing and can slide up and down along the inner wall of the housing; the brake cylinder includes a cylinder barrel and a brake cylinder that can move up and down. The piston head is installed in the cylinder barrel. The cylinder barrel is divided into two cavities by the piston head, corresponding to the upper chamber located above the piston head and the lower chamber located below the piston head; the piston head is centered around its own axis and is evenly spaced circumferentially. There are a number of magnetorheological blocking channels arranged through them, and an excitation coil that can be electrically connected with the power module is installed in the piston head; the upper chamber and the lower chamber of the cylinder are connected through the magnetorheological blocking channels, and The upper chamber of the cylinder and the magnetorheological blocking channel are filled with magnetorheological fluid.

As a further improvement of the above-mentioned intensive intelligent deceleration roof, the magnetorheological obstruction channel is a spatial curve structure as a whole, including an upper connecting section, a lower connecting section and an intermediate section connected between the upper connecting section and the lower connecting section. The upper connecting section is directly connected to the upper cavity of the cylinder, and the lower connecting section is directly connected to the lower cavity of the cylinder. The upper connecting section and the lower connecting section are linear channels, while the middle section is a curved channel.

As a further improvement of the above-mentioned intensive intelligent deceleration roof, the lower connecting section is an involute linear channel.

As a further improvement of the above-mentioned intensive intelligent deceleration top, the outer wall of the piston head is concave in the middle area to form a coil embedding groove; the slot of the coil embedding groove can be sealed by a magnetic isolation copper ring to form an enclosure. An annular cavity; the excitation coil is embedded in the annular cavity; the outer wall of the piston head and the cylinder barrel are sealingly connected through a piston sealing ring, and the outer wall of the magnetic isolation copper ring and the cylinder barrel are connected through a magnetic isolation ring. Copper ring sealing ring seals the connection.

As a further improvement of the above-mentioned intensive intelligent deceleration top, the lower end of the cylinder barrel is equipped with a sealing cover; the piston head is connected to the upper end of the piston rod, and the lower end of the piston rod passes through the middle area of the sealing cover, and the piston rod The lower end of the cylinder is equipped with an anti-bump seat; the sealing cover and the inner wall of the cylinder are sealingly connected by a sealing ring, and the outer wall of the piston rod and the sealing cover are sealingly connected by a piston rod sealing ring.

As a further improvement of the above-mentioned intensive intelligent deceleration top, the piston rod is provided with a pin rod through hole close to the lower end, and the axis of the pin rod through hole is perpendicular to the length extension direction of the piston rod; in the pin rod through hole It is equipped with a anti-impact seat pin rod, and the piston rod and the anti-impact seat are connected into one body through the said anti-impact seat pin rod.

As a further improvement of the above-mentioned intensive intelligent deceleration roof, the intensive intelligent deceleration roof also includes a data acquisition device, a control device and a power module; wherein:

The power supply module is connected in series with the excitation coil to form a coil power supply circuit, and a control switch is installed in the coil power supply circuit; the excitation coil can generate magnetic current under the action of the power supply current provided by the power supply module. Magnetic field that changes the dynamic viscosity of the magnetorheological fluid in the blocked channel;

The data collection device described above can collect the speed information of the sliding vehicle when it reaches the installation position of the intensive intelligent deceleration roof, and can collect the information of the departure of the sliding vehicle from the intensive intelligent deceleration roof; and can feed back the collected information. to control device;

The control device controls the on-off between the power module and the excitation coil according to the received speed information fed back by the data acquisition device; according to the received off-position information fed back by the data acquisition device, it controls the power supply module to be sent to the excitation coil Changes in current direction and current magnitude.

As a further improvement of the above-mentioned intensive intelligent deceleration top, the power module can output the working current I _i or the working current -I _j to the excitation coil connected in series with it; the working current I _i represents the power supply when the brake cylinder is in compression condition. The working current input by the module to the excitation coil; the working current -I _j represents the working current input by the power module to the excitation coil when the brake cylinder is in the return stroke condition;

The data collection device includes a speed detection device, a wheel dislocation detection device, and a return position detection device;

The speed detection device is used to detect the speed _vm of the rolling vehicle when approaching the intensive intelligent deceleration top, and can feed back the detected speed _vm to the control device;

The wheel dislocation detection device is used to detect the wheel dislocation information C _m when the wheels of the rolling vehicle are separated from the brake cylinder cap head, and can feed back the detected wheel dislocation information C _m to the control device;

The return stroke in-position detection device is used to detect the return stroke in-position information R _m of the brake cylinder after the wheel of the rolling vehicle is separated from the brake cylinder cap head, and can feed back the detected return stroke in-position information R _m to the control device;

The control device includes a judgment module, a first control module and a second control module;

The judgment module is used to compare the received speed v _m with the preset speed v ₀ : when v _m ≤ v ₀ , issue a first execution instruction to the control switch in the coil power supply circuit; when v _m > When v ₀ , a second execution instruction is issued to the control switch and power module in the coil power supply circuit;

The first control module is used to issue a third execution instruction to the power module in the coil power supply circuit according to the received wheel dislocation information _Cm ;

The second control module is used to issue a fourth execution instruction to the control switch in the coil power supply circuit according to the received return position information R _m ;

The control switch in the coil power supply circuit cuts off the coil power supply circuit under the control of the first execution instruction, and the excitation coil is powered off;

The control switch in the coil power supply circuit turns on the coil power supply circuit under the control of the second execution instruction. At this time, the excitation coil is energized. At this time, the power module inputs the operating current I _i to the excitation coil under the control of the second execution instruction; the excitation coil Under the action of the working current I _i , a magnetic field B _i is generated, which promotes the dynamic viscosity of the magnetorheological fluid in the magnetorheological blocked channel to increase to the working viscosity μ _i ; the gas in the upper chamber of the brake cylinder is borne by the brake cylinder cap head It is compressed by the action of the wheels of the rolling vehicle, and then pushes the magnetorheological fluid with a working viscosity μ _i in the magnetorheological obstruction channel to flow into the lower chamber of the brake cylinder to absorb the kinetic energy of the rolling vehicle and achieve braking and deceleration;

Under the control of the third execution instruction, the power module in the coil power supply circuit switches the working current output to the excitation coil to the working current -I _j ; the excitation coil generates a magnetic field B _j under the action of the working current -I _j , prompting the magnetic flow The dynamic viscosity of the magnetorheological fluid in the variable obstruction channel is reduced to the working viscosity μ _j ; the compressed gas in the upper chamber of the brake cylinder expands due to the separation of the brake cylinder cap head from the wheel of the rolling vehicle, so that the brake cylinder can be The magnetorheological fluid in the lower chamber is sucked into the magnetorheological obstruction channel, and then sucked into the upper chamber of the brake cylinder until the brake cylinder returns to its original position;

The control switch in the coil power supply circuit is in a cut-off state under the control of the fourth execution instruction, and the excitation coil is powered off.

Another technical object of the present invention is to provide a control method for an intensive intelligent deceleration roof based on magnetorheological technology, which is implemented based on the above-mentioned intensive intelligent deceleration roof based on magnetorheological technology and includes the following steps:

Step 1. When the sliding vehicle dropped from the hump approaches the intensive intelligent deceleration top, the speed detection device will collect the speed v _m of the sliding vehicle and feed back the detected speed v _m to the control device. , then go to step two;

Step 2: The control device compares the received speed v _m with its own preset speed v ₀ , and determines whether to turn on the coil power supply circuit based on the comparison result: when the comparison result shows that v _m ≤ v ₀ , the coil is cut off In the power supply loop, the excitation coil is powered off, and the dynamic viscosity of the magnetorheological fluid remains unchanged, and then enters step three; when the comparison result shows that v _m > v ₀ , the coil power supply loop is turned on, the excitation coil is energized, and then step four is entered;

Step 3: The wheel of the rolling vehicle contacts the cap of the brake cylinder, causing the brake cylinder to slide down along the casing under the action of the wheel of the rolling vehicle, causing the pressure in the upper chamber of the cylinder to rise due to the pressure of the gas, and the magnetic flow Under the action of this pressure, the variable fluid flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel, and then enters step six;

Step 4: The control device controls the power module to input the working current I _i to the excitation coil; the excitation coil generates a magnetic field B _i under the action of the working current I _i , which promotes the dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel to increase to the working level. Viscosity μ _i , then proceed to step five;

Step 5: The wheel of the rolling vehicle contacts the cap of the brake cylinder, causing the brake cylinder to slide down along the casing under the action of the wheel of the rolling vehicle, causing the pressure in the upper chamber of the cylinder to increase due to the pressure of the gas, and the working viscosity increases. The magnetorheological fluid of μ _i flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel under this pressure. During this process, the kinetic energy of the sliding vehicle is converted into the deformation energy of the solid or semi-solid magnetorheological fluid to prevent the sliding vehicle. The vehicle brakes and slows down, then enters step seven;

Step 6: The wheels of the rolling vehicle roll forward along the cap head of the brake cylinder until the wheels of the rolling vehicle are out of contact with the cap head of the oil cylinder. The compressed gas in the upper chamber of the oil cylinder expands. At this time, under the action of negative pressure , the magnetorheological fluid in the lower chamber of the brake cylinder quickly flows back to the upper chamber of the brake cylinder through the magnetorheological blocking channel. At the same time, the piston head rebounds upward and returns to its original position;

Step 7: The wheels of the rolling vehicle roll forward along the cap head of the brake cylinder until the wheels of the rolling vehicle are out of contact with the cap head of the oil cylinder. The compressed gas in the upper chamber of the oil cylinder expands, and the control module sends a control command to the power module. , the power module outputs the reverse piston demagnetization current -I _j , the dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel is reduced to the minimum, and the magnetorheological fluid in the lower chamber of the brake cylinder quickly flows back to the brake through the magnetorheological obstruction channel. At the same time, the piston head rebounds upward and returns to its original position.

Another technical object of the present invention is to provide an automatic speed regulation system for a hump-sliding vehicle, including a deceleration device that includes a number of the above-mentioned intensive intelligent deceleration roofs based on magnetorheological technology.

Based on the above technical objectives, compared with the existing technology, the present invention has the following advantages:

1. Magnetorheological fluid is a special mixture of micron-sized soft magnetic particles and viscoplastic polymers. It is an intelligent composite material that can instantaneously (millisecond-level) change its dynamic damping characteristics under the action of a magnetic field. The invention uses magnetorheological fluid as an energy-consuming material, and can output appropriate braking work and resistance work in real time for intelligent magnetorheological deceleration under various types of railway vehicles (including various weights and speeds), realizing The critical speed of the intelligent deceleration top is adjustable and controllable in real time.

2. During the braking and deceleration stage of the rolling vehicle, the present invention can adjust the dynamic viscosity of the magnetorheological fluid by regulating the working current I _i to absorb part of the kinetic energy of the rolling vehicle, thereby providing real-time adjustable The controlled critical speed realizes real-time control of the critical speed of deceleration, which is suitable for a variety of hook truck speed conditions;

3. After the vehicle is released from the brake cylinder of the intensive intelligent deceleration roof, the present invention can also provide real-time adjustable and controllable return damping by regulating the operating current _Ij , thereby realizing real-time control of the return speed of the cylinder head. Control, suitable for various hook truck speed conditions;

4. Compared with conventional deceleration jacks, the present invention has fewer spare parts, lowers the failure rate, and saves high maintenance costs.

Description of the drawings

Figure 1 is a schematic structural diagram of the intensive intelligent deceleration roof (first structure) based on magnetorheological technology according to the present invention;

Figure 2 is a cross-sectional view of the piston rod in Figure 1 (first cross-sectional direction);

Figure 3 is a cross-sectional view of the piston rod in Figure 1 (second cross-sectional direction);

Figure 4 is an enlarged structural schematic diagram of part A in Figure 3;

Figure 5 is a schematic diagram of the magnetic circuit;

Figure 6 is a schematic structural diagram of the intensive intelligent deceleration roof (second structure) based on magnetorheological technology according to the present invention;

In Figures 1 to 4: brake cylinder 1, housing 10, anti-collision hollow pin hole 11, anti-collision seat pin 12, anti-collision seat 13, sealing cover 21, sealing ring 22, piston rod sealing ring 23, magnetic flow Variable blocking channel 30, upper connecting section 301, middle section 302, lower connecting section 303, excitation coil 31, magnetic isolation copper ring 32, piston sealing ring 33, magnetic isolation copper ring sealing ring 34, piston head 35, piston rod 36, Wire trough 361, pin rod through hole 362, rail waist connecting bolt 50.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention. The relative arrangement of components and steps, expressions, and numerical values set forth in these examples do not limit the scope of the invention unless otherwise specifically stated. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the authorized specification. In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.

Example 1

As shown in Figures 1 to 4, the intensive intelligent deceleration roof based on magnetorheological technology according to the present invention includes a housing, a brake cylinder, a control device, a data acquisition device and a power module. in:

The outer wall of the housing is provided with rail waist connecting bolts to connect with the rail waist laid at the marshalling station to form a speed regulating device for the automatic speed regulating system of the hump slip vehicle.

The lower end of the brake cylinder is inserted into the housing and can slide up and down along the inner wall of the housing. The brake cylinder includes a cylinder barrel, a piston head, a sealing cover and a piston rod; wherein:

The lower end of the cylinder is open, and the inner wall close to the open end is provided with internal threads for threaded connection with the sealing cover. The upper end of the cylinder tube is the cap head of the brake cylinder and can be in contact with the wheels of the rolling vehicle.

The piston head is movably installed in the cylinder barrel, so that the cylinder barrel is divided into two chambers by the piston head, corresponding to an upper chamber located above the piston head and a lower chamber located below the piston head. The piston head has a number of magnetorheological blocking channels evenly distributed around its own axis, and an excitation coil that can be electrically connected to the power module is installed in the piston head; the upper and lower chambers of the cylinder barrel They are connected through the magnetorheological blocking channel, and the upper chamber of the cylinder barrel and the magnetorheological blocking channel are filled with magnetorheological fluid. At the same time, the upper chamber of the cylinder barrel is also filled with gas, such as nitrogen.

The magnetorheological blocking channel is a spatial curve structure as a whole, including an upper connecting section, a lower connecting section and an intermediate section connected between the upper connecting section and the lower connecting section. The upper connecting section is directly connected to the upper chamber of the cylinder. , the lower connecting section is directly connected to the lower cavity of the cylinder, and the upper connecting section and the lower connecting section are linear channels, while the middle section is a curved channel. Preferably, the lower connecting section is an involute linear channel (that is, arranged in a trumpet shape).

In order to facilitate the installation of the excitation coil, the outer wall of the piston head of the present invention is concave in the middle area to form a coil embedding groove; the slot of the coil embedding groove can happen to pass through a magnetic isolation copper ring (the magnetic isolation copper ring can block magnetic flux leakage ) sealing to form an annular cavity; the excitation coil is embedded in the annular cavity; the outer wall of the piston head and the cylinder are sealedly connected by a piston sealing ring, and the outer wall of the magnetic isolation copper ring It is connected to the cylinder tube through a magnetic isolation copper ring sealing ring.

The upper end of the piston rod is connected to the piston head. In fact, the piston rod and the piston head according to the present invention are an integral structure, and the piston head is a cap structure provided on the upper end of the piston rod. The lower end of the piston rod passes through the middle area of the sealing cover, and the lower end of the piston rod is equipped with a shock stopper; the sealing cover and the inner wall of the cylinder are connected through a sealing ring, and the outer wall of the piston rod and the sealing cover are connected through a sealing ring. The piston rod sealing ring seals the connection.

In order to realize the connection between the piston rod and the anti-bump seat, the piston rod of the present invention is provided with a pin rod through hole at a position close to the lower end, and the axis of the pin rod through hole is perpendicular to the length extension direction of the piston rod; the pin The anti-impact seat pin rod is equipped in the rod through hole, and the piston rod and the anti-impact seat are connected together through the anti-impact seat pin rod. When in use, the anti-bump seat is placed at the bottom of the casing, and is fixed to the bottom of the casing by a anti-bump hollow pin (omitted in the figure) passing through the anti-blow hollow pin hole.

In order to facilitate wiring (such as the installation of power supply wires connected to the excitation coil), the piston rod of the present invention is provided with a wire groove.

The power module is connected in series with the excitation coil to form a coil power supply loop. A control switch is installed in the coil power supply loop, and the power module can output an operating current I _i or an operating current - to the excitation coil connected in series with it. I _j ; The working current I _i represents the working current input by the power module to the excitation coil when the brake cylinder is in the compression working condition; the working current -I _j represents the working current input by the power supply module to the excitation coil when the brake cylinder is in the return stroke working condition. current. In fact, the operating current -I _j is the current that can promote the demagnetization of the residual magnetic field on the piston head. It is a current with decreasing current size (the frequency can be selected as 10Hz), and can be returned to zero when the piston head is reset, thus promoting the magnetic flow. The dynamic viscosity of the magnetorheological fluid in the variable obstruction channel is reduced to the initial viscosity.

The data acquisition device includes a speed detection device, a wheel dislocation detection device, and a return position detection device. The speed detection device is used to detect the speed _vm of the rolling vehicle when it approaches the intensive intelligent deceleration top, and can feed back the detected speed _vm to the control device. The wheel dislocation detection device is used to detect the wheel dislocation information C _m when the wheel of the rolling vehicle is separated from the brake cylinder cap head, and can feed back the detected wheel dislocation information C _m to the control device. The return stroke in-position detection device is used to detect the return stroke in-position information R _m of the brake cylinder after the wheel of the rolling vehicle is separated from the brake cylinder cap head, and can feed back the detected return stroke in-position information R _m to the control device. In specific applications, the speed detection device can currently use a speed measuring pedal, which is installed at the end or entrance of the deceleration top group of the railway line. The wheel dislocation detection device can be implemented by setting a striker on the surface of the housing. When the wheel breaks away from the cap head, the cylinder cap head is at the lowest point. In addition, the wheel dislocation detection device can also use a general pressure sensor to detect and provide feedback. In fact, during the period from when the wheel touches the brake cylinder cap head to when it is separated from the brake cylinder cap head, the wheel dislocation detection device is installed on the deceleration top. The pressure sensor can detect the dead weight of the rolling vehicle. When the wheel is separated from the brake cylinder cap, the detection value of the pressure sensor will return to zero. Therefore, a change in the detection value of the pressure sensor can be used to feed back the wheel dislocation information C _m . The return stroke in-position detection device can provide feedback by detecting the pressure in the cylinder barrel. Usually, when the brake cylinder returns in place, the piston head is reset and the pressure in the cylinder barrel returns to the initial pressure. Of course, the return stroke detection device can also be directly installed with a reset stroke switch in the cylinder barrel for detection. At this time, when the piston head is reset, it can touch the reset stroke switch, thus cutting off the control circuit and stopping the brake cylinder.

The control device includes a judgment module, a first control module and a second control module;

The judgment module is used to compare the received speed v _m with the preset speed v ₀ : when v _m ≤ v ₀ , issue a first execution instruction to the control switch in the coil power supply circuit; when v _m > When v ₀ , a second execution instruction is issued to the control switch and power module in the coil power supply circuit;

The first control module is used to issue a third execution instruction to the power module in the coil power supply circuit according to the received wheel dislocation information _Cm ;

The second control module is used to issue a fourth execution instruction to the control switch in the coil power supply circuit according to the received return position information R _m ;

The control switch in the coil power supply circuit cuts off the coil power supply circuit under the control of the first execution instruction, and the excitation coil is powered off;

The control switch in the coil power supply circuit turns on the coil power supply circuit under the control of the second execution instruction. At this time, the excitation coil is energized. At this time, the power module inputs the operating current I _i to the excitation coil under the control of the second execution instruction; the excitation coil Under the action of the working current I _i , a magnetic field B _i is generated, which promotes the dynamic viscosity of the magnetorheological fluid in the magnetorheological blocked channel to increase to the working viscosity μ _i ; the gas in the upper chamber of the brake cylinder is borne by the brake cylinder cap head It is compressed by the action of the wheels of the rolling vehicle, and then pushes the magnetorheological fluid with a working viscosity μ _i in the magnetorheological obstruction channel to flow into the lower chamber of the brake cylinder to absorb the kinetic energy of the rolling vehicle and achieve braking and deceleration;

Under the control of the third execution instruction, the power module in the coil power supply circuit switches the working current output to the excitation coil to the working current -I _j ; the excitation coil generates a magnetic field B _j under the action of the working current -I _j , prompting the magnetic flow The dynamic viscosity of the magnetorheological fluid in the variable obstruction channel is reduced to the working viscosity μ _j ; the compressed gas in the upper chamber of the brake cylinder expands due to the separation of the brake cylinder cap head from the wheel of the rolling vehicle, so that the brake cylinder can be The magnetorheological fluid in the lower chamber is sucked into the magnetorheological obstruction channel, and then sucked into the upper chamber of the brake cylinder until the brake cylinder returns to its original position;

The control switch in the coil power supply circuit is in a cut-off state under the control of the fourth execution instruction, and the excitation coil is powered off.

Based on the above-mentioned intensive intelligent deceleration roof, the present invention provides a control method for the intensive intelligent deceleration roof, which includes the following steps:

Step 1. When the sliding vehicle dropped from the hump approaches the intensive intelligent deceleration top, the speed detection device will collect the speed v _m of the sliding vehicle and feed back the detected speed v _m to the control device. , then go to step two;

Step 2: The control device compares the received speed v _m with its own preset speed v ₀ , and determines whether to turn on the coil power supply circuit based on the comparison result: when the comparison result shows that v _m ≤ v ₀ , the coil is cut off In the power supply loop, the excitation coil is powered off, and the dynamic viscosity of the magnetorheological fluid remains unchanged, and then enters step three; when the comparison result shows that v _m > v ₀ , the coil power supply loop is turned on, the excitation coil is energized, and then step four is entered;

Step 3: The wheel of the rolling vehicle contacts the cap of the brake cylinder, causing the brake cylinder to slide down along the casing under the action of the wheel of the rolling vehicle, causing the pressure in the upper chamber of the cylinder to rise due to the pressure of the gas, and the magnetic flow Under the action of this pressure, the variable fluid flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel, and then enters step six;

Step 4: The control device controls the power module to input the working current I _i to the excitation coil; the excitation coil generates a magnetic field B _i under the action of the working current I _i , which promotes the dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel to increase to the working level. Viscosity μ _i , then proceed to step five;

Step 5: The wheel of the rolling vehicle contacts the cap of the brake cylinder, causing the brake cylinder to slide down along the casing under the action of the wheel of the rolling vehicle, causing the pressure in the upper chamber of the cylinder to increase due to the pressure of the gas, and the working viscosity increases. The magnetorheological fluid of μ _i flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel under this pressure. During this process, the kinetic energy of the sliding vehicle is converted into the deformation energy of the solid or semi-solid magnetorheological fluid to prevent the sliding vehicle. The vehicle brakes and slows down, then enters step seven;

Step 6: The wheels of the rolling vehicle roll forward along the cap head of the brake cylinder until the wheels of the rolling vehicle are out of contact with the cap head of the oil cylinder. The compressed gas in the upper chamber of the oil cylinder expands. At this time, under the action of negative pressure , the magnetorheological fluid in the lower chamber of the brake cylinder quickly flows back to the upper chamber of the brake cylinder through the magnetorheological blocking channel. At the same time, the piston head rebounds upward and returns to its original position;

Step 7: The wheels of the rolling vehicle roll forward along the cap head of the brake cylinder until the wheels of the rolling vehicle are out of contact with the cap head of the oil cylinder. The compressed gas in the upper chamber of the oil cylinder expands, and the control module sends a control command to the power module. , the power module outputs the reverse piston demagnetization current -I _j , the dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel is reduced to the minimum, and the magnetorheological fluid in the lower chamber of the brake cylinder quickly flows back to the brake through the magnetorheological obstruction channel. At the same time, the piston head rebounds upward and returns to its original position.

The control method of the intensive intelligent deceleration top according to the present invention will be described below with reference to several embodiments.

Example 2

When the wheels of the vehicle rolled down from the hump approach the intelligent deceleration top, the control module sends a control command to the power module, and the power module outputs the working current I _i . The excitation coil in the piston head generates a magnetic field under the action of the working current I _i , and the magnetic flow Under the action of the magnetic field, the magnetorheological fluid produces a magnetorheological effect, and the dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel 30 changes. At the same time, the wheels of the rolling vehicle contact the cap head of the brake cylinder, and the brake cylinder acts on the wheel. It continues to slide down. At this time, the pressure of nitrogen and magnetorheological fluid (dynamic viscosity has changed to a solid and semi-solid state) in the upper chamber of the vehicle's brake cylinder rises rapidly, and the magnetorheological fluid (dynamic viscosity has changed to a solid and semi-solid state) state) flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel 30 under the action of this pressure. During this process, the kinetic energy of the rolling vehicle is converted into the deformation energy of the solid or semi-solid magnetorheological fluid (the dynamic viscosity has changed and turned into a solid Semi-solid state), during this process, the intelligent deceleration top plays a braking and decelerating role on the rolling vehicle.

Under the pressure of the wheel, when the brake cylinder of the intelligent deceleration top drops to the lowest point, as the wheel continues to roll forward, the wheel is out of contact with the cylinder cap head, and the compressed nitrogen in the upper chamber of the cylinder expands. At this time, the control module sends out The control command is sent to the power module, and the power module outputs the reverse piston demagnetization current -I _j . The dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel 30 becomes smaller, and the magnetorheological fluid in the lower chamber of the brake cylinder passes through the magnetorheological obstruction. The channel 30 quickly returns to the upper chamber of the brake cylinder, and at the same time, the cylinder rebounds upward and returns to its original position.

Example 3

When the vehicle rolling down from the hump approaches the intelligent deceleration top at a speed greater than the prescribed speed, the control module sends a control command to the power module. The power module outputs the working current I _i , and the excitation coil in the piston head generates a magnetic field under the action of the working current I _i . _Bi , the magnetorheological fluid produces a magnetorheological effect under the action of the magnetic field _Bi . The dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel 30 increases to the working viscosity μ _i . At the same time, the wheel contact system of the rolling vehicle is The cap head of the cylinder is moved, and the brake cylinder continues to slide under the action of the wheel. At this time, the pressure in the upper chamber of the vehicle's brake cylinder rises rapidly (there is nitrogen and magnetorheological fluid in the chamber (the dynamic viscosity has changed, becoming a solid and semi-solid state) ), the magnetorheological fluid (the dynamic viscosity has changed to a solid and semi-solid state) flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel 30 under the action of this pressure. During this process, the kinetic energy of the rolling vehicle is converted into a solid or semi-solid state. The deformation energy of the solid magnetorheological fluid (the dynamic viscosity has changed to a solid and semi-solid state). During this process, the intelligent deceleration top plays a braking and decelerating role on the rolling vehicle.

Under the pressure of the wheel, when the brake cylinder of the intelligent deceleration top drops to the lowest point, as the wheel continues to roll forward, the wheel is out of contact with the cylinder cap head, and the compressed nitrogen in the upper chamber of the cylinder expands. At this time, the control module sends out The control command is sent to the power module. The power module outputs the reverse piston demagnetization current -I _j . The dynamic viscosity of the magnetorheological fluid in the magnetorheological obstruction channel 30 is reduced to the minimum. The magnetorheological fluid in the lower chamber of the brake cylinder passes through the magnetorheological fluid. The blocked channel 30 quickly flows back to the upper chamber of the brake cylinder. At the same time, the cylinder rebounds upward and returns to its original position.

Example 4

When the vehicle rolling down from the hump approaches the intelligent deceleration top at a speed less than or equal to the specified speed, the control module sends a control command to the power module. The power module has no output working current, and the wheels of the rolling vehicle contact the cap head of the brake cylinder, and the brakes The cylinder continues to slide under the action of the wheel. At this time, the pressure in the upper chamber of the vehicle's brake cylinder increases. Under the action of this pressure, the magnetorheological fluid flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel 30. In the process, the vehicle's brake fluid is released. The loss of kinetic energy can be ignored. During this process, the intelligent deceleration jack does not act as a brake to decelerate the vehicle.

Under the pressure of the wheel, when the brake cylinder of the intelligent deceleration top drops to the lowest point, as the wheel continues to roll forward, the wheel is out of contact with the cylinder cap head, and the compressed nitrogen in the upper chamber of the cylinder expands. At this time, under the negative pressure Under the action, the magnetorheological fluid in the lower chamber of the brake cylinder quickly flows back to the upper chamber of the brake cylinder through the magnetorheological blocking channel 30. At the same time, the cylinder rebounds upward and returns to its original position.

Example 5

The only difference between this embodiment and the intensive intelligent deceleration roof based on magnetorheological technology described in Embodiment 1 is that in this embodiment, the signal spring 25 and the annular washer type load cell 38 are specifically disclosed. So that the present invention can realize the functions of the wheel dislocation detection device and the return position detection device.

The ring washer type load cell 38 is a commercially mature force sensor that can test tension and pressure, that is, the positive and negative directions of force.

The specific implementation process is as follows: During the period from when the wheel touches the brake cylinder cap head until it is separated from the brake cylinder cap head, the ring washer type load cell 38 can sense the force transmitted from the signal spring 25 . When the wheel contacts the cap head, the cap head moves down. When the wheel breaks away from the cap head, the ring washer type load cell 38 can sense the pressure F from the signal spring 25. If F≠0 and ΔF>0, it is judged that the wheel contacts the cap head. The cap head is moved downwards to the lowest position by the wheel pressure. The control module controls the power module to output an appropriate current Ii or Ij according to the pressure F.

Control of wheel separation information Cm: When the wheel is separated from the cap head, the ring washer type load cell 38 can sense the pressure F(-) from the signal spring 25. F≠0 and ΔF<0 are judged as wheel separation. position but not the return trip.

Control of the return stroke in-position information Rm: When the wheel is away from the cap head for a certain period of time Tm, the ring washer type load cell 38 can sense the pressure F(-) from the signal spring 25. F=0 is judged as the wheel is out of position and the return stroke is in place. .

Claims (10)

1. An intensive intelligent deceleration roof based on magnetorheological technology, including a housing and a brake cylinder whose lower end is inserted into the housing and can slide up and down along the inner wall of the housing; the brake cylinder includes a cylinder barrel and a brake cylinder that can move up and down. A piston head is movably installed in the cylinder barrel. The cylinder barrel is divided into two chambers by the piston head, corresponding to an upper chamber located above the piston head and a lower chamber located below the piston head; it is characterized in that it also includes a data acquisition device , control device and power module; The piston head has a number of magnetorheological blocking channels evenly distributed around its own axis, and an excitation coil that can be electrically connected to the power module is installed in the piston head; the upper and lower chambers of the cylinder barrel It is connected through the magnetorheological blocking channel, and the upper chamber of the cylinder and the magnetorheological blocking channel are both filled with magnetorheological fluid; The power supply module is connected in series with the excitation coil to form a coil power supply circuit, and a control switch is installed in the coil power supply circuit; the excitation coil can generate magnetic current under the action of the power supply current provided by the power supply module. Magnetic field that changes the dynamic viscosity of the magnetorheological fluid in the blocked channel; The data collection device described above can collect the speed information of the sliding vehicle when it reaches the installation position of the intensive intelligent deceleration roof, and can collect the information of the departure of the sliding vehicle from the intensive intelligent deceleration roof; and can feed back the collected information. to control device; The control device controls the on-off between the power module and the excitation coil according to the received speed information fed back by the data acquisition device; according to the received off-position information fed back by the data acquisition device, it controls the power supply module to be sent to the excitation coil Changes in current direction and current magnitude. 2. The intensive intelligent deceleration roof based on magnetorheological technology according to claim 1, characterized in that the magnetorheological blocking channel is a spatial curve structure as a whole, including an upper connecting section, a lower connecting section and an upper connecting section. The middle section between the connecting section and the lower connecting section, the upper connecting section is directly connected to the upper cavity of the cylinder, the lower connecting section is directly connected to the lower cavity of the cylinder, and both the upper connecting section and the lower connecting section are linear. channel, while the middle section is a curved channel. 3. The intensive intelligent deceleration roof based on magnetorheological technology according to claim 2, characterized in that the lower connecting section is an involute linear channel. 4. The intensive intelligent deceleration top based on magnetorheological technology according to claim 1 or 2, characterized in that the outer wall of the piston head is concave to form a coil embedding groove in the middle region; the notch of the coil embedding groove is formed. It can be sealed by a magnetic isolation copper ring to form an annular cavity; the excitation coil is embedded in the annular cavity; The outer wall of the piston head and the cylinder barrel are sealingly connected by a piston sealing ring, and the outer wall of the magnetic isolation copper ring and the cylinder barrel are sealingly connected by a magnetic isolation copper ring sealing ring. 5. The intensive intelligent deceleration top based on magnetorheological technology according to claim 4, characterized in that the lower end of the cylinder barrel is equipped with a sealing cover; the piston head is connected to the upper end of the piston rod, and the piston rod The lower end of the piston rod passes through the middle area of the sealing cover, and the lower end of the piston rod is equipped with a shock stopper; The sealing cover and the inner wall of the cylinder are sealingly connected by a sealing ring, and the outer wall of the piston rod and the sealing cover are sealingly connected by a piston rod sealing ring. 6. The intensive intelligent deceleration top based on magnetorheological technology according to claim 5, characterized in that the piston rod is provided with a pin rod through hole at a position close to the lower end, and the axis of the pin rod through hole Perpendicular to the length extension direction of the piston rod; the through hole of the pin rod is equipped with an anti-impact seat pin rod, and the piston rod and the anti-impact seat are connected together through the said anti-impact seat pin rod. 7. The intensive intelligent deceleration roof based on magnetorheological technology according to claim 6, characterized in that, The power module can output operating current to the excitation coil connected in series with it. Or working current-/> ;Operating current/> Indicates the working current input by the power module to the excitation coil when the brake cylinder is in compression condition; working current-/> Indicates the operating current input by the power module to the excitation coil when the brake cylinder is in the return stroke condition; The data collection device includes a speed detection device, a wheel dislocation detection device, and a return position detection device; The speed detection device is used to detect the speed of the rolling vehicle when it approaches the intensive intelligent deceleration top. , and can convert the detected speed/> Feedback to control device; The wheel dislocation detection device is used to detect the wheel dislocation information when the wheels of the rolling vehicle are separated from the brake cylinder cap head. , and can store the detected wheel dislocation information/> Feedback to control device; The return stroke in-position detection device is used to detect the return stroke in-position information of the brake cylinder after the wheel of the rolling vehicle has separated from the brake cylinder cap head. , and can put the detected return information in place/> Feedback to control device; The control device includes a judgment module, a first control module and a second control module; The judgment module is used to compare the received speed with preset speed/> size: when/> When /> When, the second execution command is issued to the control switch and power module in the coil power supply circuit; The first control module is used to control the vehicle according to the received wheel dislocation information. , issuing the third execution instruction to the power module in the coil power supply circuit; The second control module is used to determine the return position according to the received return information. , issuing the fourth execution instruction to the control switch in the coil power supply circuit; The control switch in the coil power supply circuit cuts off the coil power supply circuit under the control of the first execution instruction, and the excitation coil is powered off; The control switch in the coil power supply circuit turns on the coil power supply circuit under the control of the second execution command. At this time, the excitation coil is energized. At this time, the power module inputs operating current to the excitation coil under the control of the second execution command. ;The working current of the excitation coil/> A magnetic field is generated under the action of , causing the dynamic viscosity of the magnetorheological fluid in the magnetorheological blocked channel to increase to the working viscosity/> ;The gas in the upper chamber of the brake cylinder is compressed by the brake cylinder cap head being subjected to the action of the vehicle wheel, thereby promoting the working viscosity in the magnetorheological obstruction channel/> The magnetorheological fluid flows into the lower chamber of the brake cylinder to absorb the kinetic energy of the rolling vehicle and achieve braking and deceleration; Under the control of the third execution instruction, the power module in the coil power supply circuit switches the working current output to the excitation coil to the working current - ;The excitation coil is operating current-/> A magnetic field is generated under the action of , causing the dynamic viscosity of the magnetorheological fluid in the magnetorheological blocked channel to drop to the working viscosity/> ; The compressed gas in the upper chamber of the brake cylinder expands as the brake cylinder cap head separates from the wheel of the rolling vehicle, so that the magnetorheological fluid in the lower chamber of the brake cylinder can be sucked into the magnetorheological obstruction channel, and then into the brake. The upper chamber of the operating cylinder until the brake cylinder returns to the position and returns to the initial position; The control switch in the coil power supply circuit is in a cut-off state under the control of the fourth execution instruction, and the excitation coil is powered off. 8. The intensive intelligent deceleration top based on magnetorheological technology according to claim 6, characterized in that the lower end of the piston rod is installed in the anti-bump seat placed at the bottom of the housing; An annular washer type load cell is installed on the anti-bump seat, and a signal spring is connected to the periphery of the piston rod between the annular washer type load cell sensor and the sealing cover; The data acquisition device uses a ring washer type load cell to collect the information on the position of the rolling vehicle away from the intensive intelligent deceleration roof; The control device controls changes in the direction and size of the current delivered to the excitation coil by the power module based on the magnitude and direction of the force fed back by the ring washer type load cell. 9. A control method for an intensive intelligent deceleration jack based on magnetorheological technology, implemented based on the intensive intelligent deceleration jack based on magnetorheological technology according to claim 7, characterized in that it includes the following steps: Step 1. When the rolling vehicle that has been rolled down from the hump approaches the intensive intelligent deceleration top, the speed detection device will collect the speed of the rolling vehicle. , and compare the detected speed/> Feedback to the control device, then enter step two; Step 2. The control device converts the received speed With its own preset speed/> Compare and determine whether to turn on the coil power supply circuit based on the comparison result: When the comparison result indicates/> When , the coil power supply loop is cut off, the excitation coil is powered off, and the dynamic viscosity of the magnetorheological fluid remains unchanged, and then enters step three; when the comparison result shows/> When, turn on the coil power supply circuit, energize the excitation coil, and then enter step four; Step 3: The wheel of the rolling vehicle contacts the cap of the brake cylinder, causing the brake cylinder to slide down along the casing under the action of the wheel of the rolling vehicle, causing the pressure in the upper chamber of the cylinder to rise due to the pressure of the gas, and the magnetic flow Under the action of this pressure, the variable fluid flows to the lower chamber of the brake cylinder through the magnetorheological blocking channel, and then enters step six; Step 4. The control device controls the power module to input operating current to the excitation coil. ;The working current of the excitation coil/> A magnetic field is generated under the action of , causing the dynamic viscosity of the magnetorheological fluid in the magnetorheological blocked channel to increase to the working viscosity/> , then go to step five; Step 5: The wheel of the rolling vehicle contacts the cap of the brake cylinder, causing the brake cylinder to slide down along the casing under the action of the wheel of the rolling vehicle, causing the pressure in the upper chamber of the cylinder to increase due to the pressure of the gas, and the working viscosity increases. The magnetorheological fluid flows to the lower chamber of the brake cylinder through the magnetorheological obstruction channel under this pressure. During this process, the kinetic energy of the rolling vehicle is converted into the deformation energy of the solid or semi-solid magnetorheological fluid to act on the rolling vehicle. When the brake is used to decelerate, proceed to step seven; Step 6: The wheels of the rolling vehicle roll forward along the cap head of the brake cylinder until the wheels of the rolling vehicle are out of contact with the cap head of the brake cylinder, and the compressed gas in the upper chamber of the brake cylinder expands. At this time, Under the action of negative pressure, the magnetorheological fluid in the lower chamber of the brake cylinder quickly flows back to the upper chamber of the brake cylinder through the magnetorheological blocked channel. At the same time, the brake cylinder rebounds upward and returns to its original position; Step 7: The wheels of the rolling vehicle roll forward along the cap head of the brake cylinder until the wheels of the rolling vehicle are out of contact with the cap head of the brake cylinder. The compressed gas in the upper chamber of the brake cylinder expands and the control device issues a control The command is sent to the power module, and the power module outputs the reverse piston demagnetization current - , the dynamic viscosity of the magnetorheological fluid in the magnetorheological blocked channel is reduced to the minimum. The magnetorheological fluid in the lower chamber of the brake cylinder quickly flows back to the upper chamber of the brake cylinder through the magnetorheological blocked channel. At the same time, the brake cylinder returns upward. to return to the initial position. 10. An automatic speed regulation system for a hump-sliding vehicle, including a deceleration device, characterized in that the deceleration device includes a plurality of intensive intelligent deceleration roofs based on magnetorheological technology as claimed in claim 7.