Carbon fiber multifunctional friction material self-cleaning precise filling device

Abstract

The present invention provides a self-cleaning, precise filling device for carbon fiber multifunctional friction material, addressing the low feeding accuracy and leakage issues of existing quantitative feeding devices. This device improves feeding control accuracy by installing a valve assembly at the inlet of the feeding unit. During feeding, the feeding roller is rotated to transport the material, shortening the feeding distance and reducing powder loss during transportation. A scraping impeller is incorporated into the compensation unit to compensate for residual powder in the arc groove of the feeding roller and achieve a self-cleaning function. Furthermore, a control unit is introduced to provide feedback to the entire mechanical structure, allowing for real-time adjustment of feeding parameters based on operating conditions. This design aims to improve the accuracy and stability of the entire mold quantitative feeding process.

Description

Technical Field

[0001] The invention belongs to the technical field of friction plate manufacturing, and in particular relates to a self-cleaning precise filling device for carbon fiber multifunctional friction material. Background Art

[0002] Friction materials are a common composite material in daily life and are widely used in automobiles, trains, generators, agricultural machinery and other equipment. With the continuous development of modern science and technology, people have placed higher demands on the performance of friction materials. Carbon fiber reinforced friction materials are a type of friction material made with carbon fiber as the reinforcement. The main components include carbon fiber, resin and other binders. They have excellent properties such as light weight, high strength, high temperature resistance and wear resistance. However, with the rapid development of high-end mechanical equipment, the transmission friction pairs of major equipment such as new fighter jets, heavy machinery and armored vehicles are required to serve in extreme working conditions such as ultra-low temperature, ultra-high load and ultra-large torque. The transmission / braking characteristics and wear resistance of the friction material are extremely demanding. Researchers usually modify the material to meet the multifunctional requirements of the friction material, such as resistance to low-temperature adhesion, high load and efficient braking. However, it is worth noting that high-precision powder filling during the material preparation process also has a significant impact on the final performance of the multifunctional friction material. If the device feeds too much powder, not only will the density of the final friction plate increase, but it will also exceed the maximum density of the compressible powder on the flat vulcanizer, resulting in an increase in the thickness of the friction plate and a change in size, which does not meet the product specification requirements. If the device feeds too little powder, the density of the product will decrease, which in turn will lead to a decrease in the performance of the friction plate (such as hardness), affecting the multifunctional use requirements. Therefore, the design and development of a carbon fiber reinforced friction material precision filling device with a control system to improve the powder feeding accuracy during the weighing process has very important practical significance for improving the performance of the final friction plate molded product.

[0003] Existing automated systems for friction plate processing primarily focus on mixing and hot pressing processes, with quantitative powder feeding being relatively rare. Existing quantitative powder feeding systems are commonly used in other industries, such as coal processing and food packaging. These systems can be categorized by feeding principle, including spiral, rotary, electromagnetic vibration, and pneumatic.

[0004] Chinese patent CN217516269U discloses a dual-tube spiral quantitative feeding device. This mechanism uses an upper steady-flow conveying tube and a lower dynamic metering tube to achieve steady-flow conveying and weighing of materials, thereby achieving quantitative material delivery. However, the longer spiral tube design increases the powder conveying distance, increasing equipment costs and causing powder to adhere to the inner wall of the tube during transportation, resulting in unnecessary losses.

[0005] Chinese patent CN221564534U discloses a vibrating feeder. This mechanism uses vibration to smoothly transport materials by adjusting the angle of the conveyor trough. However, when the mechanism is operating, a small amount of residual powder may remain in the conveyor trough. Furthermore, the mechanism generates significant vibration and noise, which can have a certain impact on workers' health.

[0006] Chinese patent CN106882604B discloses a disc-type powder quantitative feeding device. This device uses a rotating disc and spiral blades to achieve quantitative transportation. However, during transportation, powder still adheres to the rotating disc and the spiral pipe, and there is no suitable residual material processing device.

[0007] Chinese patent CN118149354B discloses a linear continuous powder feeder for experimental use. This device first incorporates a main hopper to add and disperse powder, then uses gas to convey the powder. A powder removal device is used at the connecting pipe to compensate for the powder, achieving quantitative feeding. However, during pneumatic conveying, the material is prone to clogging at the bend in the guide pipe, causing significant wear and tear on the equipment.

[0008] It can be seen that existing quantitative powder feeding devices all have a certain degree of powder leakage, have defects in controlling feeding accuracy, are rarely used in friction plate production, and are not suitable for the friction plate's requirements for the stability of the physical and chemical properties of carbon fiber multifunctional friction materials. Therefore, developing a high-precision quantitative powder feeding device that does not change the physical and chemical properties of carbon fiber multifunctional friction materials is crucial to improving the accuracy and stability of the finished carbon fiber composite friction plate quality. Summary of the Invention

[0009] The purpose of the present invention is to solve the shortcomings of existing quantitative feeding devices such as low feeding accuracy and leakage during the feeding process, and to provide a self-cleaning and precise filling device for carbon fiber multifunctional friction material.

[0010] The concept of the present invention:

[0011] Taking into account the accuracy problems of existing feeding devices (also called filling devices), and combining with the requirements of carbon fiber composite friction plates for uniform physical and chemical properties of the friction powder used, the present invention intends to specifically design a carbon fiber multifunctional friction material self-cleaning precision filling device, that is, a precision feeding device used in the preparation of friction plates.

[0012] Carbon fiber multifunctional friction materials have high strength and wear resistance, and are mostly used in high-performance braking systems, such as aircraft brake pads, high-end car brake pads, etc. In these applications, the stability and reliability of the materials are extremely high. The powder of carbon fiber multifunctional friction materials is extremely fluffy and fine. It is not only easily compressed during transportation, but also easily adheres to parts. It is not suitable for feeding in a way that may introduce impurities or affect the material properties, such as the aforementioned spiral, rotary, electromagnetic vibration and pneumatic powder feeding methods. At the same time, carbon fiber multifunctional friction materials are not easy to generate a lot of dust. Even if dust is generated, it is difficult to effectively treat it by gas blowing due to its characteristics. Gas blowing has instability factors, which may change the composition state of each powder raw material, causing the components of each raw material to be unstable. The distribution of carbon fiber multifunctional friction material powder is uneven, which in turn affects the performance of the final product (the components of carbon fiber multifunctional friction material powder are complex. In actual use, different raw materials will be selected according to different needs and mixed in proportion. Whether the mixing is uniform will have a certain impact on the performance of the final friction plate). It can be seen that for the transportation of carbon fiber multifunctional friction material powder, we should not only pay attention to the transportation accuracy, but also pay attention to the uniformity and quality accuracy of the conveyed powder. That is, in the process of conveying, we should avoid introducing factors that affect the physical and chemical properties of the powder as much as possible to prevent changes in the powder, which may cause changes in properties such as density, affecting the performance of the final product.

[0013] Based on this, the present invention designs the following self-cleaning precise filling device for carbon fiber multifunctional friction material by shortening the feeding distance as much as possible and avoiding factors that affect the quality and weight of the powder. The specific technical solution is as follows:

[0014] The self-cleaning and precise filling device for carbon fiber multifunctional friction material is special in that it includes a support platform, a material storage unit, a material feeding unit, a compensation unit and a control unit;

[0015] The support platform includes an upper support platform and a lower support platform stacked up and down;

[0016] The storage unit is arranged on the upper support platform and delivers powder (the powder is carbon fiber multifunctional friction material powder) to the feeding unit located on the lower support platform through the feeding pipe; the storage unit plays a temporary storage and buffering role for the powder to prevent the filling speed from being too fast and making it difficult to control the accuracy;

[0017] The feeding unit is mainly used to quantitatively convey the powder, and includes a feeding roller, a feeding roller drive motor, a protective sleeve and a sealing ring;

[0018] The feed roller includes a tail section, a first sealing protection section, a feed groove section, a second sealing protection section and a drive connection section connected in sequence along the axial direction, and a sealing groove is provided at the connection between each section; the feed roller is sleeved in the protective sleeve; the sealing ring is provided in the sealing groove and is fixedly connected to the protective sleeve;

[0019] The groove section of the feed roller is provided with two arc grooves for containing powder along the circumferential direction; a spacing is left between the two arc grooves, and the central angle corresponding to the spacing is 30±5° (in this way, interference with the subsequent scraping impeller caused by too small a spacing can be avoided, and the powder scraped by the scraping impeller can be avoided from falling outside the discharge port due to too large a spacing). The central angle corresponding to each arc groove is 40±5° (the central angle corresponding to each arc groove should not be too large or too small; if the central angle is too small, the mass of the transported powder will be too small, resulting in low feeding efficiency; if the central angle is too large, the radius of the scraping impeller will be greatly increased. In order to avoid interference with the outer shell, the height of the outer shell needs to be further adjusted, affecting the compensation effect).

[0020] The feed roller drive motor is connected to the drive connection section of the feed roller, driving the feed roller to rotate relative to the protective sleeve and the sealing ring. When the arc groove faces downward, the powder contained therein falls automatically under the action of gravity. In this process, no external force factors that affect the physical and chemical properties of the powder are introduced, thereby ensuring the stability of the powder performance.

[0021] The protective sleeve is symmetrically provided with two openings at the top and bottom of the feed roller groove section, and each opening can expose the two arc grooves at the same time; the feed pipe is adapted to extend into the top opening of the protective sleeve (the top opening is rectangular), and its end is provided with an elastic shaft sleeve (also known as an elastic blocking strip, which is mainly installed on both sides of the feed pipe parallel to the axis of the feed roller) that contacts the feed roller groove section. The elastic shaft sleeve can just block the gap between the feed pipe and the feed roller to prevent powder from falling through the gap and causing feeding errors;

[0022] The compensation unit includes a housing and two sets of compensation cleaning mechanisms. The compensation unit is responsible for compensating and conveying a small amount of powder that adheres to the inner wall of the arc groove of the feed roller and fails to be filled in time, thereby achieving a self-cleaning effect.

[0023] The shell is located between the lower support platform and the feeding unit, and its top is adapted to the bottom of the protective cover. The top is provided with a through hole that docks with the bottom opening of the protective cover, and the bottom is provided with a discharge pipe adapted to pass through the lower support platform;

[0024] Two sets of compensation cleaning mechanisms are symmetrically arranged at both ends of the housing, respectively used to scrape off the powder adhering to the inner walls of the two arc grooves of the feed roller. That is, the compensation cleaning mechanisms are arranged one-to-one correspondingly to the arc grooves, and one set of compensation cleaning mechanisms performs compensation cleaning operations on one arc groove.

[0025] The roughness of the inner wall of the protective sleeve and the inner wall of the outer shell is not higher than 0.4 μm, so as to ensure that the powder is smooth enough so that the powder will not stick to the inner wall of the protective sleeve and the inner wall of the outer shell during the turning and transportation process and the unloading process, thereby reducing the loss during the transportation process;

[0026] The control unit includes a host computer, a strain gauge torque sensor, and a data processing module. The strain gauge torque sensor is located at the tail end of the feed roller and is used to measure the rotational torque of the feed roller drive motor. The strain gauge torque sensor transmits the torque signal to the data processing module, which is processed into a powder quality signal and then fed back to the host computer for accumulation. The host computer adjusts the operating status of various electrical components in the device based on the feedback signal. The strain gauge torque sensor provides negative feedback closed-loop control for the entire self-cleaning precision filling device. Its operating principle is as follows: during the last filling, the host computer sends a feedback signal, which first acts on the valve assembly drive motor to reduce the valve opening, thereby slowing the discharge speed. Secondly, it acts on the feed roller drive motor to reduce the speed, gradually reducing the filling rate of powder in the mold in the next process step. When the feeding progress reaches 100%, the feed roller drive motor stops operating and the valve assembly of the storage unit is completely closed to prevent the feeding setting from being exceeded. At the same time, the upper computer also controls the various drive motors in the compensation unit. After completing the feeding of a mold, the compensation cleaning mechanism no longer works (that is, the worm gear no longer rotates, and the scraping impeller controlled by the connecting rod will move away from the arc groove of the feed roller).

[0027] The strain-type torque sensor detects the torque required by the feed roller drive motor to drive the feed roller and the powder to rotate each time, and uses the data processing module to convert the torque signal into a powder quality signal and transmit it to the host computer. Its measurement principle is: M = Jα, where α is the angular acceleration, which is a fixed parameter of the feed roller drive motor, and J is the moment of inertia of the feed roller and the powder, which can be calculated by Calculate the mass of the powder per charge using the strain gauge torque sensor, where R is the radius of the feed roller and m is the total mass of the feed roller and powder. This provides the mass of powder per charge. It's worth noting that during each rotation of the feed roller, the driving torque measured by the strain gauge torque sensor includes not only the rollover torque of the feed roller and the powder itself, but also the friction torque required to overcome the contact between the elastic sleeve and the feed roller. To ensure accurate calculations, this friction torque should be removed. This friction torque can be calculated in advance using the formula: T = μFR, where T is the friction torque, μ is the coefficient of kinetic friction at the contact between the elastic sleeve and the feed roller, F is the pressure exerted by the elastic sleeve on the feed roller, and R is the radius of the feed roller.

[0028] During each powder filling process, the upper control unit compares the set mass of powder to be added to the mold with the total mass of powder already filled. Based on the feeding conditions, the parameters of each component are adjusted in real time until the mold is accurately filled. When the next mold is ready to be filled, the feed roller drive motor continues to rotate the feed roller, and the strain gauge torque sensor monitors the quality of the newly added powder to ensure the accuracy of each filling. This reciprocating process continues until the end.

[0029] Furthermore, each set of compensation cleaning mechanisms includes a scraper assembly, a connecting rod assembly, a worm gear assembly, and a hydraulic assembly;

[0030] The scraper assembly is located in the housing and includes a scraper impeller and a scraper impeller connecting shaft. The scraper impeller is coaxially mounted on the scraper impeller connecting shaft and uses the scraper impeller connecting shaft as a rotation axis. The rotation radius of the scraper impeller is equal to the radius of the arc surface of the circular arc groove, so that the scraper impeller cleans and rubs the inner wall of the circular arc groove during the subsequent compensation conveying process to achieve a better compensation conveying effect for the powder.

[0031] The connecting rod assembly and the worm gear assembly are respectively arranged on both sides of the housing;

[0032] The connecting rod assembly is connected to one end of the scraper impeller connecting shaft and is used to control the horizontal movement of the scraper assembly in the housing, driving it away from or close to the arc groove of the feed roller; when the scraper impeller connecting shaft is driven by the connecting rod assembly to a position close to the arc groove of the feed roller, the scraper impeller and the arc groove of the feed roller are coaxial;

[0033] The worm gear assembly is connected to the other end of the scraper impeller connecting shaft, which is used to control the rotation of the scraper assembly in the housing, driving it to scrape off the powder adhered to the inner wall of the arc groove of the feed roller; the scraper impeller connecting shaft can rotate under the drive of the worm gear. When it rotates to the point where the scraper impeller faces downward, the powder scraped from the arc groove by the scraper impeller will fall to the discharge port under the action of the rotating centrifugal force and gravity, thereby ensuring high-precision feeding;

[0034] The hydraulic assembly is used to achieve the engagement and separation of the worm wheel and the worm in the worm gear assembly.

[0035] Furthermore, the scraping impeller includes blades, connecting rods and connecting sleeves; the blades are connected to the connecting sleeves through the connecting rods; the curvature of the blade surface is the same as the curvature of the arc groove, and a accommodating groove is provided on the surface, and both ends of the surface are set as inclined surfaces to facilitate the first scraping of powder, and the powder scraped out for the first time will automatically fall down; the scraping impeller connecting shaft is installed in the connecting sleeve, and both ends thereof extend out of the connecting sleeve; wherein, the blades are made of smooth and non-adhesive material, the four groove walls of the accommodating groove are set as inclined surfaces, and of the two groove edges arranged in sequence on the surface of the accommodating groove along the scraping direction, the groove edge located on the rear side of the scraping direction is slightly higher than the groove edge located on the front side of the scraping direction, so that the inner wall of the arc groove can be cleaned again by using the higher groove edge, and the powder scraped for the second time can fall into the accommodating groove just to better contain the powder.

[0036] Furthermore, the housing is a rectangular parallelepiped with an inlet at the top and an outlet at the bottom; the inlet is seamlessly connected to the bottom opening of the protective cover, and the outlet is seamlessly connected to the discharge pipe. The outlet size is slightly larger than the inlet size based on the subsequent process flow, that is, the outlet size is not larger than the size of the friction plate, so as to prevent the powder from falling outside the mold and causing loss.

[0037] Two sets of guide grooves are symmetrically provided on two opposite sides of the housing; the two sets of guide grooves are respectively used to install the scraper impeller connecting shafts of the two compensation cleaning mechanisms; the two guide grooves located on the same side are located in the same horizontal plane, and the lengths of the two guide grooves are such that when the scraper impeller connecting shaft moves to the inner limit position of the guide groove under the drive of the connecting rod assembly (i.e., when the scraper impeller approaches the circular arc groove of the feed roller), the scraper impeller connecting shaft is coaxial with the groove surface of the circular arc groove, and the two scraper impellers do not interfere with each other during rotation;

[0038] The inner walls of the other two opposite side surfaces of the shell are inclined from top to bottom toward the outlet to form inclined surfaces, and the two inclined surfaces do not interfere with the rotation of the two scraping impellers.

[0039] Furthermore, a first mounting hole is defined in the middle of the upper support platform, and a second mounting hole is defined in the middle of the lower support platform. The two mounting holes are coaxially arranged. The first mounting hole is provided with the feed pipe, and the second mounting hole is provided with the discharge pipe. In other words, the upper support platform provides support for the storage unit, while the lower support platform provides support for the feed unit and the compensation unit. Together, the upper and lower support platforms connect the storage unit, feed unit, and compensation unit into a compact whole.

[0040] Furthermore, the material storage unit includes a material storage barrel and a valve assembly;

[0041] The storage barrel is located on the upper support platform, and is provided with a powder inlet on the top, a powder outlet and a support column at the bottom (the support column mainly serves as a positioning and installation function); wherein the powder outlet is sealedly connected to the inlet of the feed pipe; a valve assembly is installed on the feed pipe, and the valve assembly includes a plug valve and a valve drive motor;

[0042] The feeding unit is mounted on the lower support platform via a feeding unit connecting column, which is mainly used to support the feeding roller and the feeding roller driving motor;

[0043] The protective cover comprises a feed roller protective cover and a tail connection protective cover.

[0044] Furthermore, the connecting rod assembly includes a connecting rod I, a connecting rod II, a connecting rod driving motor and a connecting rod driving motor connecting column;

[0045] The connecting rod drive motor is installed on the lower support platform through the connecting rod drive motor connecting column, and its output is connected to one end of the connecting rod I, the other end of the connecting rod I is hinged to one end of the connecting rod II, and the other end of the connecting rod II is coaxially connected to one end of the scraper impeller connecting shaft through a bearing.

[0046] Furthermore, the worm gear assembly includes a worm gear, a worm drive motor, a worm drive motor connecting column, a support base, a worm, and a worm drive motor auxiliary connecting column;

[0047] The worm drive motor is mounted on the lower support platform via a worm drive motor connecting column, the output of which is connected to one end of the worm, and the middle part of the worm is sleeved in a support seat mounted on the lower support platform via an auxiliary connecting column of the worm drive motor;

[0048] The worm gear is coaxially mounted on the other end of the scraper impeller connecting shaft;

[0049] The hydraulic assembly synchronously lifts the worm drive motor to connect the column and the worm drive motor to assist in connecting the column, thereby achieving engagement and separation between the other end of the worm and the worm wheel.

[0050] The feed unit in the self-cleaning precision filling device operates as follows: The valve assembly of the storage unit is opened, allowing powder to flow from the storage tank into the arc-shaped groove of the feed roller. Driven by the feed roller's drive motor, the feed roller, carrying the powder, rotates 180° within its protective sleeve, aligning the arc-shaped groove with the discharge pipe. Under the influence of gravity, the powder falls directly from the arc-shaped groove into the discharge pipe, achieving transport of the powder. A sealing ring within the feed roller reduces losses caused by leakage during transport. Furthermore, a protective sleeve is installed around the feed roller to isolate it from the outside air and prevent contamination of the powder by impurities. An elastic sleeve is installed on the end of the feed pipe where it extends into the protective sleeve, contacting the feed roller. This sleeve not only serves as an auxiliary connection but also prevents powder from falling through the gap between the feed pipe and the feed roller into the protective sleeve during transport, potentially causing blockage and reducing feeding accuracy.

[0051] In addition, the present invention also provides a method for accurately feeding the carbon fiber multifunctional friction material self-cleaning accurate filling device, which is special in that it includes the following steps:

[0052] 1) Determine the number of feeding times and the last feeding amount according to the product dosage requirements, and set the opening and duration of the valve assembly of the storage unit for each feeding;

[0053] 2) Adding carbon fiber multifunctional friction material powder into the storage barrel of the storage unit;

[0054] 3) According to the setting requirements of step 1), the upper computer controls the valve assembly of the storage unit to open, and when the amount of powder in the arc groove reaches the set amount of this feeding, the valve assembly closes;

[0055] 4) The host computer activates the feed roller drive motor of the feed unit, controlling the feed roller to flip 180° so that the arc groove faces the bottom opening of the protective cover. The powder falls under the action of gravity through the outer shell of the compensation unit and the discharge pipe to the next process link. At the same time, a strain gauge torque sensor is used to detect the torque used by the feed roller drive motor to flip the powder. The data processing module converts this torque signal into a powder quality signal and feeds it back to the host computer for accumulation.

[0056] 5) The host computer starts the connecting rod drive motors of the two sets of compensation cleaning mechanisms, controlling the two scraper impeller connecting shafts to move to the inner limit position of their respective guide grooves;

[0057] 6) The upper computer starts the hydraulic components of the two sets of compensation cleaning mechanisms to synchronously raise the worm drive motor connection column and the worm drive motor auxiliary connection column, so that the worm and the worm wheel are engaged;

[0058] 7) The host computer starts the worm drive motors of the two sets of compensation cleaning mechanisms, respectively controlling the two scraper impeller connecting shafts to drive the scraper impellers to rotate, scraping off the powder adhering to the inner wall of the arc groove. The scraper impellers are then rotated until the receiving groove faces downward, using gravity to cause the powder in the receiving groove to fall through the discharge pipe to the next process link. At the same time, the host computer controls each component to return to its initial state.

[0059] 8) Repeat steps 3)-7) until the last addition is completed.

[0060] The present invention also provides an equipment for preparing friction plates for high-performance braking systems. The special feature of the equipment is that the equipment uses the above-mentioned self-cleaning precision filling device for carbon fiber multifunctional friction materials to ensure accurate and lossless feeding in the precise feeding link, and the powder processing and subsequent process links in the equipment can all use existing technologies.

[0061] Advantages of the present invention:

[0062] 1. The feeding method of the present invention is different from existing feeding methods. The entire device relies on the gravity of the powder to complete the conveying. The principle is simple and can ensure the uniformity and quality accuracy of the carbon fiber friction material powder filling, further making the performance more uniform. The entire carbon fiber multifunctional friction material self-cleaning precision filling device is achieved through the cooperation of mechanical units and control units. According to the actual feeding conditions, each unit is driven and controlled to ensure the feeding accuracy. Specifically, it is manifested in the following aspects:

[0063] ① The control unit controls the valve assembly in the storage unit and sets the number of flips of the feeding unit and the last feeding amount according to product quality requirements. The control of the number of times can achieve the feeding accuracy each time, and the control of the last feeding amount can also prevent excessive addition of powder from affecting the accuracy of the final product.

[0064] ② An elastic sleeve is provided at the end of the feed pipe to contact the groove section of the feed roller to block the small gap between the feed pipe and the feed roller, thereby preventing powder from falling through the gap and causing feeding errors;

[0065] ③ By providing a protective cover with a smooth inner wall outside the feed roller and a sealing ring between the groove section and the adjacent section of the feed roller, losses during the feeding process can be further avoided;

[0066] ④ By setting a compensation unit between the feeding unit and the discharge pipe, the powder adhering to the inner wall of the arc groove of the feeding roller is compensated and conveyed and the self-cleaning function is realized. At the same time, the inner wall of the shell of the compensation unit is tilted and smoothed to prevent the powder from adhering to the inner wall of the shell, thereby further improving the feeding accuracy;

[0067] ⑤Through the optimization of the blade structure and the selection of materials, the blade is not only smooth and non-sticky, but also has the double function of scraping away the powder adhering to the inner wall of the arc groove of the feed roller, further ensuring the high-precision feeding effect during compensation transportation;

[0068] In summary, the present invention minimizes powder loss and the impact of the feeding process on the powder through multiple controls, thereby ensuring the feeding accuracy and quality accuracy of the powder.

[0069] 2. The present invention realizes the quantitative transportation of powder in a short distance and in a simple manner by means of the flipping of the feed roller. The entire process relies on the gravity of the powder itself and does not use too many other auxiliary mechanisms. Therefore, this feeding method not only shortens the feeding distance and realizes efficient feeding, but also saves processing costs and equipment installation space, reduces the contact opportunities between powder and other parts, avoids more powder adhesion, and does not generate large vibrations and noise, avoiding affecting the health of operators.

[0070] 3. The present invention can reduce the loss of powder during transportation and improve the powder utilization rate and feeding accuracy by the protective effect of the sealing ring and protective sleeve inside the feed roller on the powder, and the self-cleaning compensation effect of the scraping impeller on the powder adhering to the inner wall of the feed roller groove.

[0071] 4. The present invention utilizes the feedback effect of the control unit on the entire mechanical structure to adjust the feeding parameters in real time according to the working conditions, aiming to improve the accuracy of the entire mold quantitative feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 Schematic diagram of the structure of the device of the present invention;

[0073] Figure 2 for Figure 1 Middle AA section view;

[0074] Figure 3 Schematic diagram of the structure of the compensation unit and the feeding unit in the device of the present invention Figure 1 ;

[0075] Figure 4 Schematic diagram of the structure of the compensation unit and the feeding unit in the device of the present invention Figure 2 ;

[0076] Figure 5 Schematic diagram of the structure of the feeding unit in the device of the present invention;

[0077] Figure 6 for Figure 5 Middle BB cross-section;

[0078] Figure 7 This is a schematic diagram of the structure of the compensation unit in the device of the present invention without the outer shell;

[0079] Figure 8 This is a schematic diagram of the control unit in the device of the present invention;

[0080] Figure 9 This is a working principle diagram of the worm-connected column hydraulic system in the device of the present invention;

[0081] The accompanying drawings are:

[0082] 1-Storage barrel, 2-Valve assembly, 3-Feed pipe, 4-Support platform, 401-Upper support platform, 402-Lower support platform, 403-Mounting through hole, 5-Feeding unit, 501-Tail connection protection sleeve, 502-Sealing ring, 503-Strain type torque sensor, 504-Feed roller protection sleeve, 505-Feed roller, 506-Feed roller drive motor, 507-Feed roller groove section, 508-Sealing protection section, 509-Elastic bushing, 510-Arc groove, 6-Compensation unit, 601-Connecting rod II, 602-Connecting Rod I, 603-connecting rod drive motor, 604-connecting rod drive motor connecting column, 605-worm gear, 606-worm drive motor, 607-worm drive motor connecting column, 608-support seat, 609-housing, 610-worm, 611-worm drive motor auxiliary connecting column, 612-hydraulic assembly, 613-scraper impeller, 6131-blade, 6132-connecting rod, 6133-connecting sleeve, 6134-accommodating groove, 614-scraper impeller connecting shaft, 7-feeding unit connecting column, 8-discharge pipe. DETAILED DESCRIPTION

[0083] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments:

[0084] like Figures 1-9 The carbon fiber multifunctional friction material self-cleaning precision filling device includes a supporting platform, a storage unit, a feeding unit, a compensation unit and a control unit.

[0085] The supporting platform includes an upper supporting platform and a lower supporting platform stacked up and down; a first mounting through hole is opened in the middle of the table top of the upper supporting platform, and a second mounting through hole is opened in the middle of the table top of the lower supporting platform, and the two mounting through holes are coaxially arranged; wherein, the upper supporting platform provides support for the storage unit, and the lower supporting platform provides support for the feeding unit and the compensation unit, and the upper supporting platform and the lower supporting platform cooperate to connect the three parts of the storage unit, the feeding unit and the compensation unit into a compact whole.

[0086] The storage unit acts as a temporary storage and buffer for the powder, preventing the filling speed from being too fast and making it difficult to control the accuracy. It includes a storage barrel and a valve assembly; a powder inlet is provided at the top of the storage barrel (the powder is added to the storage barrel through the previous mixing process), a powder outlet and four support columns are provided at the bottom, and the entire storage barrel is mounted on the upper support platform via the four support columns. The storage barrel delivers powder to the feeding unit located on the lower support platform through the feed pipe; the valve assembly is mounted on the feed pipe to control the on and off of the feeding, and it includes a plug valve and a valve drive motor (when filling begins, the plug valve opens to allow the entire flow channel to pass through, and the powder falls from the valve body to the feeding unit. When the powder feeding process is completed, the plug valve closes; in addition, the rotation angle of the plug valve body can be adjusted by the valve drive motor, so that the overlapping area of ​​the valve body through-hole and the feed pipe cross-section changes, thereby changing the flow area of ​​the powder and realizing the control of the powder flow rate). The feed pipe is mounted at the first mounting through-hole, and its inlet is sealed with the powder outlet of the storage unit.

[0087] The feed unit is mounted on the lower support platform via a feed unit connecting column. It mainly transports powder in a quantitative manner and includes a feed roller, a feed roller drive motor, a protective sleeve, and a sealing ring. The feed roller includes a tail section, a first sealing protection section, a feed groove section, a second sealing protection section, and a drive connection section, which are connected in sequence along the axial direction. A sealing groove is provided at the connection between each section. The first sealing protection section and the second sealing protection section are located on either side of the feed groove section and can both be referred to as sealing protection sections. The feed roller is sleeved within the protective sleeve. The sealing ring is provided within the sealing groove and is fixedly connected to the protective sleeve. The feed roller groove section has two circular arc grooves for holding powder along the circumferential direction. There is a spacing between the two circular arc grooves, and the spacing corresponds to a central angle of 30°, with each circular arc groove corresponding to a central angle of 45°. The feed roller drive motor is connected to the drive connection section to drive the feed roller to rotate relative to the protective sleeve and the sealing ring so that the powder falls from the circular arc groove under the action of gravity. The protective cover includes a feed roller protective cover and a tail connection protective cover, which are set up in a split manner for easy disassembly and assembly; the feed roller protective cover is symmetrically provided with two openings at the top and bottom of the feed roller groove section, and each opening can expose two arc grooves at the same time; the feed pipe is adapted to extend into the top opening of the protective cover, and its end is provided with an elastic shaft sleeve that contacts the feed roller groove section.

[0088] The feed unit in the self-cleaning precision filling device operates as follows: The valve assembly of the storage unit is opened, allowing powder to flow from the storage tank into the arc-shaped groove of the feed roller. Driven by the feed roller's drive motor, the feed roller, carrying the powder, rotates 180° within its protective sleeve, aligning the arc-shaped groove with the discharge pipe. Under the influence of gravity, the powder falls directly from the arc-shaped groove into the discharge pipe, achieving transport of the powder. A sealing ring within the feed roller reduces losses caused by leakage during transport. Furthermore, a protective sleeve is installed outside the feed roller to isolate it from the outside air, preventing contamination of the powder by impurities. An elastic sleeve is installed on the end face of the protective sleeve where the feed pipe extends into the feed unit, contacting the feed roller. This not only serves as an auxiliary connection but also further prevents powder from falling through the gap between the feed pipe and the feed roller into the protective sleeve during transport, potentially causing blockage and reducing feeding accuracy.

[0089] The compensation unit's function is to compensate for the small amount of powder adhering to the inner wall of the arc-shaped groove of the feed roller, reducing losses during transportation and thus improving feeding accuracy. It comprises a housing and two sets of compensation cleaning mechanisms. The housing is located between the lower support platform and the feed unit. Its top is adapted to the bottom of the protective cover and is provided with a through-hole at the top that mates with the bottom opening of the protective cover. The bottom is provided with a discharge pipe that passes through the lower support platform and is installed in the second mounting hole. The two sets of compensation cleaning mechanisms are symmetrically arranged at both ends of the housing, respectively used to scrape off powder adhering to the inner walls of the two arc-shaped grooves of the feed roller. Each set of compensation cleaning mechanisms includes a scraper assembly, a connecting rod assembly, a worm gear assembly, and a hydraulic assembly. The scraper assembly is located in the outer shell, and includes a scraper impeller and a scraper impeller connecting shaft; the scraper impeller is coaxially installed on the scraper impeller connecting shaft, and takes the scraper impeller connecting shaft as the rotation axis, and its rotation radius is equal to the radius of the arc surface of the arc groove, so that the scraper impeller can clean and rub the inner wall of the arc groove during the subsequent compensation conveying process to achieve better compensation conveying effect of the powder; the connecting rod assembly and the worm gear assembly are respectively arranged on both sides of the outer shell; the connecting rod assembly is connected to one end of the scraper impeller connecting shaft, and is used to control the horizontal movement of the scraper assembly in the outer shell, driving it away from or close to the arc groove of the feed roller. When the scraper impeller connecting shaft is When the connecting rod assembly is driven to a position close to the arc groove of the feed roller, the scraper impeller is coaxial with the arc groove of the feed roller; the worm gear assembly is connected to the other end of the scraper impeller connecting shaft, which is used to control the rotation of the scraper assembly in the outer shell, driving it to scrape off the powder adhered to the inner wall of the arc groove of the feed roller; the scraper impeller connecting shaft can rotate under the drive of the worm gear, and when it rotates to the point where the scraper impeller faces downward, the powder scraped from the arc groove by the scraper impeller will fall to the discharge port under the action of the rotating centrifugal force and gravity, thereby ensuring high-precision feeding; the hydraulic assembly is used to realize the engagement and separation of the worm gear and worm in the worm gear assembly.

[0090] Specifically, the outer shell is a rectangular parallelepiped with an inlet on the top and an outlet on the bottom; the inlet is seamlessly connected to the bottom opening of the protective cover, and the outlet is seamlessly connected to the discharge pipe, and the outlet size is slightly larger than the inlet size based on the subsequent process flow; two sets of guide grooves are symmetrically arranged on the two opposite sides of the outer shell; the two sets of guide grooves are respectively used to install two sets of scraper impeller connecting shafts of the compensation cleaning mechanism; the two guide grooves on the same side are located in the same horizontal plane, and the lengths of the two guide grooves meet the requirement that when the scraper impeller connecting shaft moves to the inner limit position of the guide groove under the drive of the connecting rod assembly (that is, when the scraper impeller is close to the arc groove of the feed roller), the scraper impeller connecting shaft is coaxial with the groove surface of the arc groove, and the two scraper impellers do not interfere with each other when rotating; the inner walls of the other two opposite sides of the outer shell are inclined from top to bottom toward the outlet to form an inclined surface, and the two inclined surfaces do not interfere with the rotation of the two scraper impellers. The scraping impeller includes blades, connecting rods and connecting sleeves; the blades are connected to the connecting sleeves through the connecting rods; the curvature of the blade surface is the same as the curvature of the arc groove, and a accommodating groove is provided on the surface, and both ends of the surface are provided with inclined surfaces, which are convenient for the first scraping of powder, and the powder scraped out for the first time will automatically fall down; the scraping impeller connecting shaft is installed in the connecting sleeve, and both ends thereof extend out of the connecting sleeve; wherein, the blades are made of smooth and non-adhesive material, the four groove walls of the accommodating groove are all set as inclined surfaces, and of the two groove edges arranged in sequence on the surface of the accommodating groove along the scraping direction, the groove edge located on the rear side of the scraping direction is slightly higher than the groove edge located on the front side of the scraping direction, so that the inner wall of the arc groove can be cleaned again by using the higher groove edge, and the powder scraped for the second time can fall into the accommodating groove just right to better contain the powder.

[0091] The connecting rod assembly includes connecting rods I and II, a connecting rod drive motor, and a connecting rod drive motor connection column. The connecting rod drive motor is mounted on the lower support platform via the connecting rod drive motor connection column. Its output is connected to one end of connecting rod I, the other end of which is hinged to one end of connecting rod II. The other end of connecting rod II is coaxially connected to a section of the scraper impeller connection shaft via a bearing. The worm gear assembly includes a worm gear, a worm drive motor, a worm drive motor connection column, a support base, a worm, and a worm drive motor auxiliary connection column. The worm drive motor is mounted on the lower support platform via the worm drive motor connection column. Its output is connected to one end of the worm gear. The middle section of the worm gear is inserted into the support base, which is mounted on the lower support platform via the worm drive motor auxiliary connection column. The worm gear is coaxially mounted on the other end of the scraper impeller connection shaft. The hydraulic assembly synchronously raises and lowers the worm drive motor connection column and the worm drive motor auxiliary connection column to engage and disengage the other end of the worm gear with the worm gear.

[0092] The working principle of the compensation unit in the above-mentioned self-cleaning precision filling device is as follows: first, the connecting rod drive motor drives connecting rod I to rotate, one end of connecting rod II is hinged to connecting rod I, and the other end is coaxially connected to the scraper impeller connecting shaft, and the scraper impeller connecting shaft is coaxially connected to the scraper impeller. In this way, using the transmission principle of the "crank-slider" mechanism, the two scraper impellers can be moved horizontally toward the middle in the guide groove of the shell along the scraper impeller connecting shaft. When moving to the extreme position inside the guide groove, the blades of the scraper impeller just fit into the inner wall of the arc groove of the feed roller; secondly, the worm drive motor connecting column and the worm drive motor auxiliary connecting column as the actuator are raised through the synchronous circuit hydraulic component. At this time, the worm and the worm wheel are meshed; at the same time, the worm drive motor drives the worm and worm wheel to rotate. Since the worm wheel is coaxially connected to the scraper impeller through the scraper impeller connecting shaft, the transmission principle of the "worm wheel-worm" mechanism is used to further rotate the scraper impeller. The scraper impeller's blades are designed with inclined surfaces at both ends. During rotation, the friction between the inclined surfaces and the inner wall of the arc groove improves the material removal effect. The centrifugal force of the impeller during high-speed rotation then shakes off the adhering powder and drops it into the discharge pipe. When the work is completed, the scraper impeller is stopped by turning off the worm drive motor. The worm drive motor connecting column and the worm drive motor auxiliary connecting column are then lowered using the hydraulic assembly. Finally, the connecting rod drive motor rotates in the opposite direction, causing the scraper impeller to move horizontally outward along the scraper impeller connecting shaft. During operation, the speed of the scraper impeller can be controlled by the speed of the worm drive motor. In addition, both the connecting rod drive motor and the worm drive motor are subject to feedback from the host computer, and the motor parameters will be adjusted according to the actual working conditions.

[0093] The roughness of the inner wall of the protective sleeve and the inner wall of the outer shell is not higher than 0.4 μm to ensure that they are smooth enough so that the powder will not stick to the inner wall of the protective sleeve and the inner wall of the outer shell during the flipping transportation and the unloading process, thereby reducing the loss during the transportation process.

[0094] The control unit includes a host computer, a strain gauge torque sensor, and a data processing module. The strain gauge torque sensor is located at the tail end of the feed roller and measures the rotational torque of the feed roller's drive motor. As the feed roller rotates, the strain gauge torque sensor, protective sleeve, and sealing ring remain stationary and do not rotate with it. The strain gauge torque sensor transmits the torque signal to the data processing module, which processes it into a powder quality signal and then feeds it back to the host computer for accumulation. The host computer adjusts the operating state of various electrical components in the device based on the feedback signal. The strain gauge torque sensor provides negative feedback closed-loop control for the entire precision filling device. The operating principle is as follows: during the final filling, the host computer sends a feedback signal, which first acts on the valve assembly's drive motor to reduce the valve opening, thereby slowing the discharge speed. It then acts on the feed roller's drive motor to reduce its speed, gradually reducing the powder filling rate in the mold in the next process step. When the feeding progress reaches 100%, the feed roller drive motor stops, and the valve assembly of the storage unit fully closes to prevent the set feeding value from being exceeded. When the feeding of a mold is completed, the worm gear will no longer rotate, and the scraping impeller controlled by the connecting rod will move away from the arc groove of the feed roller.

[0095] The strain-type torque sensor detects the torque required by the feed roller drive motor to drive the feed roller and the powder to rotate each time, and uses the data processing module to convert the torque signal into a powder quality signal and transmit it to the host computer. Its measurement principle is: M = Jα, where α is the angular acceleration, which is a fixed parameter of the feed roller drive motor, and J is the moment of inertia of the feed roller and the powder, which can be calculated by Calculate, where R is the radius of the feed roller and m is the total mass of the feed roller and powder, thus determining the mass of powder filled each time. It's worth noting that during each rotation of the feed roller, the driving torque measured by the strain gauge torque sensor includes not only the rollover torque of the feed roller and the powder itself, but also the friction torque required to overcome the contact between the elastic sleeve and the feed roller. To ensure accurate calculations, this friction torque should be removed. This friction torque can be calculated in advance using the principle: T = μFR, where T is the friction torque, μ is the coefficient of kinetic friction at the contact between the elastic sleeve and the feed roller, F is the pressure exerted by the elastic sleeve on the feed roller, and R is the radius of the feed roller.

[0096] During each powder filling process, the upper control unit compares the set mass of powder to be added to the mold with the total mass of powder already filled. Based on the feeding conditions, the parameters of each component are adjusted in real time until the mold is accurately filled. When the next mold is ready to be filled, the feed roller drive motor continues to rotate the feed roller, and the strain gauge torque sensor monitors the quality of the newly added powder to ensure the accuracy of each filling. This reciprocating process continues until the end.

[0097] The method for accurately feeding the self-cleaning accurate filling device of the carbon fiber multifunctional friction material comprises the following steps:

[0098] 1) Determine the number of feeding times and the last feeding amount according to the product dosage requirements, and set the opening and duration of the valve assembly of the storage unit for each feeding;

[0099] 2) Adding carbon fiber multifunctional friction material powder into the storage barrel of the storage unit;

[0100] 3) According to the setting requirements of step 1), the upper computer controls the valve assembly of the storage unit to open, and when the amount of powder in the arc groove reaches the set amount of this feeding, the valve assembly closes;

[0101] 4) The host computer activates the feed roller drive motor of the feed unit, controlling the feed roller to flip 180° so that the arc groove faces the bottom opening of the protective cover. The powder falls under the action of gravity through the outer shell of the compensation unit and the discharge pipe to the next process link. At the same time, a strain gauge torque sensor is used to detect the torque used by the feed roller drive motor to flip the powder. The data processing module converts this torque signal into a powder quality signal and feeds it back to the host computer for accumulation.

[0102] 5) The host computer starts the connecting rod drive motors of the two sets of compensation cleaning mechanisms, controlling the two scraper impeller connecting shafts to move to the inner limit position of their respective guide grooves;

[0103] 6) The upper computer starts the hydraulic components of the two sets of compensation cleaning mechanisms to synchronously raise the worm drive motor connection column and the worm drive motor auxiliary connection column, so that the worm and the worm wheel are engaged;

[0104] 7) The host computer activates the worm drive motors of the two sets of compensation cleaning mechanisms, respectively controlling the two scraper impeller connecting shafts to drive the scraper impellers to rotate, scraping off the powder adhering to the inner wall of the arc groove, and rotating the scraper impellers until the receiving groove faces downward, using gravity to cause the powder in the receiving groove to fall through the discharge pipe to the next process link; at the same time, the host computer controls each component to return to its initial state; the initial state is: the valve assembly is closed, the arc groove faces upward and directly toward the feed pipe, the worm gear is separated, and the scraper assembly is located at the outer extreme position of the guide groove, away from the arc groove of the feed roller;

[0105] 8) Repeat steps 3)-7) until the last addition is completed.

[0106] Take the friction plate with a processing size of 2.71g as an example (the density of friction material powder is basically 2.0g / cm 3 About), using the carbon fiber multifunctional friction material self-cleaning precise filling device of this embodiment, it is expected to flip the feeding 5 to 6 times, each time transporting 0.48 to 0.5g of material, the feeding roller radius is 40mm, and the maximum volume of each arc groove feeding is 0.2cm3 The actual volume of each feeding is about 0.25cm 3 The average material transport capacity of each arc groove is 0.125cm 3 Other details of the clearance fit connection between the feed roller and the protective sleeve: Since the feed roller performs relative rotational motion in the protective sleeve, a clearance fit is used to ensure rotation accuracy and stability. The gap should be small. Taking the feed roller with a radius of 40mm as an example, the basic hole system H8 / f7 fit is preferred during processing and assembly. The dimensions of the protective sleeve can be obtained by referring to the interchangeability technical manual. Feed roller size

[0107] In order to complete the equipment of the friction plate, on the basis of adopting the existing technology in other processes, the above-mentioned carbon fiber multifunctional friction material self-cleaning precision filling device can be used in the equipment to ensure accurate and lossless feeding in the precise feeding link.

[0108] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should all be included in the scope of protection of the present invention.

Claims

1. Carbon fiber multifunctional friction material self-cleaning precise filling device, characterized by: It includes a supporting platform, a material storage unit, a material feeding unit, a compensation unit and a control unit; The support platform includes an upper support platform and a lower support platform stacked up and down; The material storage unit is arranged on the upper support platform and conveys powder material to the material delivery unit located on the lower support platform through the feed pipe; The feeding unit includes a feeding roller, a feeding roller driving motor, a protective sleeve and a sealing ring; The feed roller includes a tail section, a first sealing protection section, a feed groove section, a second sealing protection section and a drive connection section connected in sequence along the axial direction, and a sealing groove is provided at the connection between each section; the feed roller is sleeved in the protective sleeve; the sealing ring is provided in the sealing groove and is fixedly connected to the protective sleeve; The groove section of the feeding roller is provided with two arc grooves for containing powder along the circumferential direction; a spacing is left between the two arc grooves, and the spacing corresponds to a central angle of 30±5°, and each arc groove corresponds to a central angle of 40±5°; The feed roller drive motor is connected to the drive connecting section, driving the feed roller to rotate relative to the protective sleeve and the sealing ring; The protective cover is symmetrically provided with two openings at the top and bottom of the feed roller groove section, and each opening can expose the two arc grooves at the same time; the feed pipe is adapted to extend into the top opening of the protective cover, and an elastic sleeve is provided at its end to contact the feed roller groove section; The compensation unit includes a housing and two sets of compensation cleaning mechanisms; The shell is located between the lower support platform and the feeding unit, and its top is adapted to the bottom of the protective cover. The top is provided with a through hole that docks with the bottom opening of the protective cover, and the bottom is provided with a discharge pipe adapted to pass through the lower support platform; Two sets of compensation cleaning mechanisms are symmetrically arranged at both ends of the shell, respectively used to scrape off the powder adhering to the inner walls of the two arc grooves of the feed roller; Each set of compensation cleaning mechanism includes a scraper assembly, a connecting rod assembly, a worm gear assembly and a hydraulic assembly; The scraper assembly is located in the housing and includes a scraper impeller and a scraper impeller connecting shaft; the scraper impeller is coaxially mounted on the scraper impeller connecting shaft and rotates with the scraper impeller connecting shaft as the axis of rotation, and its rotation radius is equal to the radius of the arc surface of the arc groove; The connecting rod assembly and the worm gear assembly are respectively arranged on both sides of the housing; The connecting rod assembly is connected to one end of the scraper impeller connecting shaft and is used to control the horizontal movement of the scraper assembly in the housing to drive it away from or close to the arc groove of the feed roller; The worm gear assembly is connected to the other end of the scraper impeller connecting shaft, and is used to control the scraper assembly to rotate in the housing, driving it to scrape off the powder adhered to the inner wall of the arc groove of the feed roller; The hydraulic assembly is used to achieve the engagement and separation of the worm wheel and the worm in the worm gear assembly; The roughness of the inner wall of the protective sleeve and the inner wall of the outer shell is not higher than 0.4 μm; The control unit includes a host computer, a strain gauge torque sensor, and a data processing module; the strain gauge torque sensor is arranged at the tail end of the feed roller and is used to measure the rotational torque of the feed roller drive motor; the strain gauge torque sensor transmits the torque signal to the data processing module, which is processed into a powder quality signal and then fed back to the host computer for accumulation; The host computer adjusts the working status of each electrical component in the device according to the feedback signal.

2. The self-cleaning precise filling device for carbon fiber multifunctional friction material according to claim 1, characterized in that: The scraper impeller includes blades, connecting rods and connecting sleeves; the blades are connected to the connecting sleeves through the connecting rods; the curvature of the blade surface is the same as the curvature of the arc groove, and an accommodating groove is provided on the surface, and inclined surfaces are provided at both ends of the surface; the scraper impeller connecting shaft is installed in the connecting sleeve, and its two ends extend out of the connecting sleeve.

3. The self-cleaning precise filling device for carbon fiber multifunctional friction material according to any one of claims 1-2, characterized in that: The shell is a rectangular parallelepiped, with an inlet on the top and an outlet on the bottom; the inlet is seamlessly connected to the bottom opening of the protective cover, and the outlet is seamlessly connected to the discharge pipe, and the outlet size is larger than the inlet size; Two sets of guide grooves are symmetrically provided on two opposite sides of the housing; the two sets of guide grooves are respectively used to install the scraper impeller connecting shafts of the two compensation cleaning mechanisms; the two guide grooves located on the same side are located in the same horizontal plane, and the lengths of the two guide grooves are such that when the scraper impeller connecting shaft moves to the inner limit position of the guide groove under the drive of the connecting rod assembly, the scraper impeller connecting shaft is coaxial with the groove surface of the arc groove, and the two scraper impellers do not interfere with each other when rotating; The inner walls of the other two opposite side surfaces of the shell are inclined from top to bottom toward the outlet to form inclined surfaces, and the two inclined surfaces do not interfere with the rotation of the two scraping impellers.

4. The self-cleaning precise filling device for carbon fiber multifunctional friction material according to claim 3, characterized in that: A first mounting through hole is provided in the middle of the table top of the upper support platform, and a second mounting through hole is provided in the middle of the table top of the lower support platform, and the two mounting through holes are coaxially arranged; wherein the feed pipe is provided at the first mounting through hole, and the discharge pipe is provided at the second mounting through hole.

5. The self-cleaning precise filling device for carbon fiber multifunctional friction material according to claim 4, characterized in that: The material storage unit includes a material storage barrel and a valve assembly; The storage barrel is located on the upper support platform, and is provided with a powder inlet on the top, a powder outlet and a support column on the bottom; wherein the powder outlet is sealedly connected to the inlet of the feed pipe; and the valve assembly is installed on the feed pipe; The feeding unit is mounted on the lower support platform via a feeding unit connecting column; The protective cover comprises a feed roller protective cover and a tail connection protective cover.

6. The self-cleaning precise filling device for carbon fiber multifunctional friction material according to claim 5, characterized in that: The connecting rod assembly includes connecting rod I, connecting rod II, a connecting rod driving motor and a connecting rod driving motor connecting column; The connecting rod drive motor is installed on the lower support platform through the connecting rod drive motor connecting column, and its output is connected to one end of the connecting rod I, the other end of the connecting rod I is hinged to one end of the connecting rod II, and the other end of the connecting rod II is coaxially connected to one end of the scraper impeller connecting shaft through a bearing.

7. The self-cleaning precise filling device for carbon fiber multifunctional friction material according to claim 6, characterized in that: The worm gear assembly includes a worm gear, a worm drive motor, a worm drive motor connecting column, a support base, a worm, and a worm drive motor auxiliary connecting column; The worm drive motor is mounted on the lower support platform via a worm drive motor connecting column, the output of which is connected to one end of the worm, and the middle part of the worm is sleeved in a support seat mounted on the lower support platform via an auxiliary connecting column of the worm drive motor; The worm gear is coaxially mounted on the other end of the scraper impeller connecting shaft; The hydraulic assembly synchronously lifts the worm drive motor to connect the column and the worm drive motor to assist in connecting the column, thereby achieving engagement and separation between the other end of the worm and the worm wheel.

8. A method for accurately feeding carbon fiber multifunctional friction material using the self-cleaning accurate filling device of claim 7, characterized in that: The following steps are involved: 1) Determine the number of times to add materials and the final amount of material to be added based on the product dosage requirements, and set the opening and duration of the valve assembly of the storage unit for each addition; 2) Add the carbon fiber multifunctional friction material powder into the storage barrel of the storage unit; 3) According to the setting requirements of step 1), the upper computer controls the valve assembly of the storage unit to open, and when the amount of powder in the arc groove reaches the set amount of this feeding, the valve assembly closes; 4) The upper computer starts the feed roller drive motor of the feed unit, controls the feed roller to flip 180 degrees, and the arc groove faces the bottom opening of the protective cover. The powder falls under the action of gravity through the outer shell of the compensation unit and the discharge pipe to the next process link; At the same time, a strain-type torque sensor is used to detect the torque used by the feed roller drive motor to flip the powder. The torque signal is converted into a powder quality signal through the data processing module and fed back to the host computer for accumulation. 5) The host computer starts the connecting rod drive motors of the two sets of compensation cleaning mechanisms, controlling the two scraper impeller connecting shafts to move to the inner limit position of their respective guide grooves; 6) The host computer starts the hydraulic components of the two sets of compensation cleaning mechanisms to synchronously raise the worm drive motor connection column and the worm drive motor auxiliary connection column, so that the worm and worm wheel engage; 7) The host computer activates the worm drive motors of the two compensation cleaning mechanisms, controlling the two scraper impeller connecting shafts to rotate the scraper impellers, scraping off the powder adhering to the inner wall of the arc groove. The scraper impellers are then rotated until the receiving groove faces downward, allowing gravity to cause the powder in the receiving groove to fall through the discharge pipe to the next process step. At the same time, the host computer controls each component to return to its initial state. 8) Repeat steps 3)-7) until the last addition is completed.

9. An apparatus for preparing a friction plate for a high-performance brake system, characterized in that: The self-cleaning precise filling device for carbon fiber multifunctional friction material according to any one of claims 1 to 7 is used to ensure accurate and lossless feeding.

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