Device for collecting particulate matters discharged by tire and brake

Abstract

The invention discloses a tire and brake discharged particulate matter collecting device, and relates to the technical field of motor vehicle discharged pollutant testing, the tire and brake discharged particulate matter collecting device comprises a tire particulate matter collecting bin and a brake particulate matter collecting bin, and the upper part of the inner cavity of the tire particulate matter collecting bin is provided with a load applying assembly; the bottom end of the load applying assembly is rotationally connected with a to-be-tested tire; a tire actual condition simulation assembly is mounted at the lower part of the inner cavity of the tire particulate matter collection bin; the brake particulate matter collecting bin is connected with the tire particulate matter collecting bin through the middle connecting bin, a brake is installed in the brake particulate matter collecting bin, the brake is connected with a tire and a brake driving motor, and the brake is in transmission connection with a to-be-tested tire through a universal transmission shaft. The brake particulate matter collecting bin and the tire particulate matter collecting bin are connected through the middle connecting bin, a tire and a brake are independently arranged through separation of the partition plate, particulate matters from different sources are prevented from being mixed, and the requirements for the accuracy and analysis results of subsequent experiments of the particulate matters are met.

Description

Technical Field

[0001] The invention relates to the technical field of motor vehicle emission pollutant testing, and more particularly to a tire and brake emission particle collection device. Background Art

[0002] With the rapid development of the automobile industry and the enhancement of environmental awareness, the control and research of automobile emission particulate matter has become particularly important. When a vehicle is driving, the friction between the tires and the ground and the wear of the brakes will produce non-exhaust particulate matter emissions (NEE), which have a certain impact on the environment and human health. In order to achieve the carbon peak target of my country's automobile industry and meet the requirements of the National VI standard, the control of non-exhaust particulate matter emissions has raised new challenges.

[0003] At present, there are many tire and brake emission particulate matter collection devices on the market, but there are some technical difficulties in practical application. The main problem is that it is difficult to ensure airtightness during the collection process, which directly affects the collection efficiency and may affect the subsequent particulate matter analysis. In addition, when existing devices collect particulate matter from two sources, it is often difficult to avoid mixing of particulate matter from different sources, which affects the accuracy and reliability of the test results.

[0004] In order to solve the above problems, there is an urgent need in the art for a tire and brake emission particulate matter collection device that can efficiently collect particulate matter, ensure air tightness, and prevent the mixing of particulate matter from different sources. The device needs to be able to simulate the vehicle load during real driving, while ensuring the source of the collected samples is clear and the accuracy of the test. Summary of the invention

[0005] In view of this, the present invention provides a tire and brake emission particulate matter collection device, aiming to solve the above technical problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A tire and brake exhaust particle collection device, comprising:

[0008] A tire particle collection bin, wherein a load applying assembly is installed at the upper part of the inner cavity of the tire particle collection bin, and the bottom end of the load applying assembly is used to rotatably connect to the tire to be tested; a tire real-time simulation assembly is installed at the lower part of the inner cavity of the tire particle collection bin, and the tire real-time simulation assembly is used to cooperate with the tire to be tested to simulate the road condition of the tire to be tested;

[0009] A brake particle collection bin, wherein the brake particle collection bin is arranged on one side of the tire particle collection bin and is connected to the tire particle collection bin through an intermediate connecting bin, wherein the interior of the intermediate connecting bin is provided with a partition separating the brake particle collection bin and the tire particle collection bin; a brake is installed inside the brake particle collection bin, wherein the shaft end of the brake away from the intermediate connecting bin is connected to the tire arranged outside the brake particle collection bin and the power output end of the brake drive motor, the shaft end of the brake close to the intermediate connecting bin extends through the partition, and is sealed and rotatably connected to the partition, and is transmission-connected to the tire to be tested through a universal transmission shaft.

[0010] Through the above technical scheme, the present invention utilizes an intermediate connecting chamber to connect the independent brake particle collection chamber and the tire particle collection chamber, and separates the tire and the brake through a partition to arrange them independently to prevent the mixing of particles from different sources; the load is applied to the tire separately through the load application component, and the tire real-time simulation component is used to simulate the car load during actual driving, thereby meeting the accuracy and analysis results of subsequent experiments on the particles.

[0011] Preferably, in the above tire and brake emission particulate matter collection device, the upper part of the tire particulate matter collection bin is connected to a tire particulate matter collection bin air inlet, and the lower part of the tire particulate matter collection bin is connected to a tire particulate matter collection bin air outlet; the two sides of the brake particulate matter collection bin are respectively connected to a brake particulate matter collection bin air inlet and a brake particulate matter collection bin air outlet. The collection bin is purged through the air intake pipe to improve the collection efficiency of particulate matter.

[0012] Preferably, in the above tire and brake emission particulate matter collection device, the load application assembly includes a hydraulic electric push rod and a tire bracket; the fixed rod of the hydraulic electric push rod is fixed on the inner top wall of the tire particulate matter collection bin, and its telescopic rod faces downward; the top surface of the tire bracket is connected to the telescopic rod end of the hydraulic electric push rod, the tire to be tested is fixed on the rotating shaft of the tire bracket, and the rotating shaft of the tire bracket is connected to the universal transmission shaft. Through the telescopic control of the hydraulic electric push rod, load pressure is applied to the tire to be tested to meet the experimental requirements.

[0013] Preferably, in the above tire and brake emission particulate matter collection device, a pressure sensor is installed between the telescopic rod end of the hydraulic electric push rod and the top surface of the tire support. The pressure sensor can detect the applied pressure value.

[0014] Preferably, in the above-mentioned tire and brake emission particulate matter collection device, the tire real-life simulation component includes a drum bracket, a drum and a drum drive motor; the drum bracket is fixed on the inner bottom wall of the tire particulate matter collection bin, the drum is rotatably connected to the drum bracket, and the drum surface abuts against the tire to be tested, the drum drive motor is arranged on the outside of the tire particulate matter collection bin, and the power output end of the drum drive motor passes through the side wall of the tire particulate matter collection bin and is connected to the rotating shaft of the drum. The drum drive motor drives the drum to rotate, which can generate friction with the tire to be tested, simulating real walking road conditions.

[0015] Preferably, in the above tire and brake emission particulate matter collection device, a temperature and humidity sensor is installed inside the tire particulate matter collection bin. Before the test, airflow needs to be introduced into the particulate matter collection bin in advance. The temperature and humidity of the airflow should be consistent with the environment of the vehicle operation process, and the flow rate of the airflow should be kept constant. The temperature and humidity sensor can play an effective detection role.

[0016] Preferably, in the above tire and brake emission particulate matter collection device, a sealed ball bearing is installed between the partition and the connecting shaft of the brake. The sealed ball bearing can meet the sealing performance of the connecting shaft structure.

[0017] Preferably, in the above tire and brake emission particulate matter collection device, the universal transmission shaft is a transmission shaft with a universal coupling, and the universal transmission shaft can be extended and retracted. Since the motor shaft and the brake shaft are fixed in position, and the tire shaft will undergo vertical displacement before and after loading and when different loads are applied, a transmission shaft with a universal coupling is installed between the tire shaft and the brake shaft, and the transmission shaft can be extended and retracted. The characteristic of this type of transmission shaft is that it can transmit between two non-collinear shafts and ensure that the axial spacing between the two shafts remains unchanged.

[0018] Preferably, in the above tire and brake emission particulate matter collection device, the inside of the tire particulate matter collection bin and the brake particulate matter collection bin are both rounded. The inside of the collection bin needs to be rounded to prevent particulate matter from accumulating, so as to further improve the collection efficiency.

[0019] Preferably, in the above-mentioned tire and brake emission particulate matter collection device, the tire particulate matter collection bin, the brake particulate matter collection bin and the intermediate connecting bin are all assembled from stainless steel plates, and the assembly points are connected with bolts and sealing gaskets to ensure the overall air tightness of the collection bin.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a tire and brake emission particulate matter collection device, which has the following beneficial effects:

[0021] 1. Independent collection and simulation of real driving: The device arranges the tires and brakes independently through the design of the collection chamber, effectively avoiding the mutual interference of particulate matter from different emission sources and ensuring the clarity of the source of the collected samples; the tires are loaded separately to simulate the car load during real driving, which improves the accuracy and practicality of the test.

[0022] 2. Efficient collection and airtightness guarantee: A transmission system is designed to ensure the airtightness of the entire device when different loads are applied, avoiding the leakage of particles, thereby improving the collection efficiency; the collection efficiency of particles is further improved by blowing the collection bin through the air intake pipe, ensuring the effective capture of particles and providing a reliable basis for subsequent analysis.

[0023] 3. Optimized design of materials and structures: The collection bin is made of 304 stainless steel, which can withstand the pressure and vibration generated during the hydraulic push rod loading and motor operation, ensuring the stability and durability of the device; bolts and sealing gaskets are used at the joints of the steel plates to ensure the overall air tightness of the collection bin and avoid leakage of particles from the joints; the inside of the collection bin is rounded to prevent particle accumulation, further improving the collection efficiency.

[0024] 4. Innovation in transmission design: A partition is set between the tire particle collection bin and the brake particle collection bin, and a sealed ball bearing and a transmission shaft with a universal coupling are installed to avoid mixing of particles in two different collection bins; the vertical displacement characteristics of the tire shaft before and after loading are fully considered to ensure the stability and airtightness of the transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 The accompanying drawing is a schematic structural diagram of a tire and brake emission particulate matter collection device provided by the present invention (the housing is shown as transparent);

[0027] Figure 2 The attached figure shows a tire and brake emission particle collection device provided by the present invention (the housing is shown as transparent) and Figure 1 Schematic diagram of the structure on the opposite side;

[0028] Figure 3 The accompanying drawing is a front view of the tire and brake emission particulate matter collection device provided by the present invention (the housing is shown as transparent);

[0029] Figure 4 The accompanying drawing is a schematic structural diagram of the universal joint transmission shaft provided by the present invention.

[0030] in:

[0031] 1-Tire particle collection bin;

[0032] 11-air inlet of tire particle collection bin; 12-air outlet of tire particle collection bin; 13-temperature and humidity sensor;

[0033] 2-Brake particle collection bin;

[0034] 21-air inlet of the brake particle collection bin; 22-air outlet of the brake particle collection bin;

[0035] 3- Load application assembly;

[0036] 31- hydraulic electric push rod; 32- tire bracket; 33- pressure sensor;

[0037] 4- Tire to be tested;

[0038] 5- Tire real-time simulation component;

[0039] 51-drum support; 52-drum; 53-drum drive motor;

[0040] 6-middle connecting warehouse;

[0041] 61- partition; 62- sealed ball bearing;

[0042] 7- Brake;

[0043] 8- Tire and brake drive motor;

[0044] 9-Universal joint shaft. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See attached Figure 1 To Attachment Figure 4 The embodiment of the present invention discloses a tire and brake emission particulate matter collection device, comprising:

[0047] A tire particle collection bin 1 is provided, wherein a load applying assembly 3 is installed at the upper part of the inner cavity of the tire particle collection bin 1, and the bottom end of the load applying assembly 3 is used for rotationally connecting the tire 4 to be tested; a tire real-time simulation assembly 5 is installed at the lower part of the inner cavity of the tire particle collection bin 1, and the tire real-time simulation assembly 5 is used for cooperating with the tire 4 to be tested to simulate the traveling road condition of the tire 4 to be tested;

[0048] A brake particle collecting bin 2 is provided, wherein the brake particle collecting bin 2 is arranged on one side of the tire particle collecting bin 1 and is connected to the tire particle collecting bin 1 through an intermediate connecting bin 6, wherein the intermediate connecting bin 6 has a partition 61 therein for isolating the brake particle collecting bin 2 and the tire particle collecting bin 1; a brake 7 is installed inside the brake particle collecting bin 2, wherein the axial end of the brake 7 away from the intermediate connecting bin 6 is connected to the tire arranged outside the brake particle collecting bin 2 and the power output end of the brake driving motor 8, the axial end of the brake 7 close to the intermediate connecting bin 6 extends through the partition 61, and is sealed and rotatably connected to the partition 61, and is transmission-connected to the tire 4 to be tested through a universal transmission shaft 9.

[0049] In order to further optimize the above technical solution, the upper part of the tire particle collection bin 1 is connected to the tire particle collection bin air inlet 11, and the lower part of the tire particle collection bin 1 is connected to the tire particle collection bin air outlet 12; the two sides of the brake particle collection bin 2 are respectively connected to the brake particle collection bin air inlet 21 and the brake particle collection bin air outlet 22.

[0050] In order to further optimize the above technical solution, the load application assembly 3 includes a hydraulic electric push rod 31 and a tire bracket 32; the fixed rod of the hydraulic electric push rod 31 is fixed on the inner top wall of the tire particle collection bin 1, and its telescopic rod faces downward; the top surface of the tire bracket 32 ​​is connected to the end of the telescopic rod of the hydraulic electric push rod 31, and the tire 4 to be tested is fixed on the rotating shaft of the tire bracket 32, and the rotating shaft of the tire bracket 32 ​​is connected to the universal transmission shaft 9.

[0051] In order to further optimize the above technical solution, a pressure sensor 33 is installed between the telescopic rod end of the hydraulic electric push rod 31 and the top surface of the tire bracket 32 ​​.

[0052] In order to further optimize the above technical solution, the tire real-life simulation component 5 includes a drum bracket 51, a drum 52 and a drum drive motor 53; the drum bracket 51 is fixed on the inner bottom wall of the tire particle collection bin 1, the drum 52 is rotatably connected to the drum bracket 51, and the surface of the drum 52 abuts against the tire 4 to be tested, the drum drive motor 53 is arranged on the outside of the tire particle collection bin 1, and the power output end of the drum drive motor 53 passes through the side wall of the tire particle collection bin 1 and is connected to the rotating shaft of the drum 52.

[0053] In order to further optimize the above technical solution, a temperature and humidity sensor 13 is installed inside the tire particle collection bin 1 .

[0054] In order to further optimize the above technical solution, a sealed ball bearing 62 is installed between the partition 61 and the connecting shaft of the brake 7.

[0055] In order to further optimize the above technical solution, the universal transmission shaft 9 is a transmission shaft with a universal coupling, and the universal transmission shaft 9 can be telescopic.

[0056] In order to further optimize the above technical solution, the interiors of the tire particle collection bin 1 and the brake particle collection bin 2 are both rounded.

[0057] In order to further optimize the above technical solution, the tire particle collection bin 1, the brake particle collection bin 2 and the intermediate connection bin 6 are all assembled from stainless steel plates, and the assembly points are connected with bolts and sealing gaskets.

[0058] In this embodiment, the schematic diagram of the collection device is as follows Figures 1 to 3 As shown, the tire particle collection bin 1 and the brake particle collection bin 2 separate the tire 4 to be tested and the brake 7 into two independent parts.

[0059] Before the test begins, a load is applied to the tire 4 to be tested through the hydraulic push rod 31 according to the load of the simulated vehicle model; at the same time, considering the inertia force generated by the vehicle during acceleration and braking, the corresponding speed and output torque of the drum drive motor 53 need to be calculated according to the vehicle rotation mass conversion coefficient δ; the calculation of δ is shown in formula (1):

[0060]

[0061] Where m is the mass of the car, kg; r is the rolling radius of the wheel, m; i g is the transmission ratio of the transmission; i0 is the transmission ratio of the main reducer; η T is the mechanical efficiency; I w is the moment of inertia of the wheel, kg·m 2 ;I f is the moment of inertia of the flywheel, kg·m 2 .

[0062] And I w with I f The calculation of is shown in formula (2) and formula (3):

[0063] I w =M w r 2 #(2)

[0064]

[0065] Take a manual transmission fuel car as an example (referred to as the prototype car), the speed ratios of each gear and the final reduction ratio of the transmission are known. First, the wheel rolling radius is tested, then the wheel rotation equivalent mass and the flywheel rotation equivalent mass are tested respectively, and finally the rotation mass conversion coefficient of each gear is calculated. The mass of the prototype car is 1475kg, and the matching tire model is 185 / 65R15. The corresponding rolling radius is 0.302m, and the wheel rotation inertia ∑I w 4.032 kg·m 2 Taking the first gear of the prototype as an example, the transmission ratio is i g is 3.615, the transmission ratio i0 of the main reducer is 4.056, and the rotational mass conversion coefficient of the prototype vehicle is 1.2989 calculated according to formula (1).

[0066] Before the test, air flow must be introduced into the particle collection bin in advance. The temperature and humidity of the air flow should be consistent with the environment during the vehicle operation process, and the air flow rate should remain constant.

[0067] After the test cycle is officially started, the tire and brake drive motor 8 and the drum drive motor 53 are started synchronously, and air flow is maintained in the collection chamber. The required test cycle is completed through motor speed regulation and brake braking. The collected particulate matter enters the corresponding analysis instrument through the air outlet, and the corresponding analysis work is carried out after the test is completed.

[0068] Since the particle collection bin needs to collect particulate matter from two sources at the same time, and in order to ensure the reliability and accuracy of the test results such as particle concentration and quantity, it is necessary to ensure the collection efficiency of the device. The following are specific measures:

[0069] The collection bin is made of 304 stainless steel, which can withstand the pressure and vibration generated during the hydraulic push rod loading and motor operation. Bolts and sealing gaskets are used at the joints of the steel plates to ensure the overall airtightness of the collection bin. In addition, the inside of the collection bin needs to be rounded to prevent the accumulation of particles, so as to further improve the collection efficiency.

[0070] A partition 61 is provided in the intermediate connecting chamber 6 between the tire particle collecting chamber 1 and the brake particle collecting chamber 2. Figure 3 As shown, the left side of the partition 61 is the tire particle collection bin 1, and the right side is the brake particle collection bin 2. There is relative movement between the universal transmission shaft 9 and the partition 61, and a sealed ball bearing 62 is installed between the universal transmission shaft 9 and the partition 61 to prevent the particles in the two different collection bins from mixing; since the motor shaft and the brake shaft are fixed in position, and the tire shaft will have vertical displacement before and after loading and when different loads are applied, a transmission shaft with a universal coupling is installed between the tire shaft and the brake shaft, and the universal transmission shaft 9 can be extended and retracted. The characteristic of this type of transmission shaft is that it can transmit between two non-collinear shafts and ensure that the axial spacing between the two shafts remains unchanged, such as Figure 4 This transmission design can avoid the existence of active gaps in the collection bin, thereby ensuring the overall air tightness of the collection bin to the greatest extent and improving the collection efficiency of particulate matter.

[0071] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0072] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tire and brake exhaust particulate matter collection device, characterized in that: include: A tire particle collection bin (1), wherein a load application component (3) is installed at the upper part of the inner cavity of the tire particle collection bin (1), and the bottom end of the load application component (3) is used to be rotatably connected to a tire to be tested (4); a tire real-time simulation component (5) is installed at the lower part of the inner cavity of the tire particle collection bin (1), and the tire real-time simulation component (5) is used to cooperate with the tire to be tested (4) to simulate the road condition of the tire to be tested (4); A brake particle collection bin (2), wherein the brake particle collection bin (2) is arranged on one side of the tire particle collection bin (1) and is connected to the tire particle collection bin (1) via an intermediate connection bin (6), wherein the intermediate connection bin (6) has a partition (61) inside for isolating the brake particle collection bin (2) and the tire particle collection bin (1); a brake (7) is installed inside the brake particle collection bin (2), wherein the axial end of the brake (7) away from the intermediate connection bin (6) is connected to the tire arranged outside the brake particle collection bin (2) and the power output end of the brake drive motor (8), wherein the axial end of the brake (7) close to the intermediate connection bin (6) extends through the partition (61) and is sealed and rotatably connected to the partition (61), and is transmission-connected to the tire (4) to be tested via a universal transmission shaft (9).

2. A tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: The upper portion of the tire particle collection bin (1) is connected to a tire particle collection bin air inlet (11), and the lower portion of the tire particle collection bin (1) is connected to a tire particle collection bin air outlet (12); the two sides of the brake particle collection bin (2) are respectively connected to a brake particle collection bin air inlet (21) and a brake particle collection bin air outlet (22).

3. A tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: The load applying assembly (3) comprises a hydraulic push rod (31) and a tire support (32); the fixing rod of the hydraulic push rod (31) is fixed on the inner top wall of the tire particle collecting bin (1), and the telescopic rod thereof faces downward; The top surface of the tire support (32) is connected to the telescopic rod end of the hydraulic electric push rod (31), the tire to be tested (4) is fixed on the rotating shaft of the tire support (32), and the rotating shaft of the tire support (32) is connected to the universal transmission shaft (9).

4. A tire and brake exhaust particulate matter collection device according to claim 3, characterized in that: A pressure sensor (33) is installed between the telescopic rod end of the hydraulic electric push rod (31) and the top surface of the tire support (32).

5. The tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: The tire real-life simulation component (5) comprises a drum support (51), a drum (52) and a drum drive motor (53); the drum support (51) is fixed on the inner bottom wall of the tire particle collection bin (1); the drum (52) is rotatably connected to the drum support (51), and the surface of the drum (52) abuts against the tire (4) to be tested; the drum drive motor (53) is arranged on the outside of the tire particle collection bin (1); the power output end of the drum drive motor (53) passes through the side wall of the tire particle collection bin (1) and is connected to the rotating shaft of the drum (52).

6. A tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: A temperature and humidity sensor (13) is installed inside the tire particle collection bin (1).

7. A tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: A sealed ball bearing (62) is installed between the partition plate (61) and the connecting shaft of the brake (7).

8. The tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: The universal transmission shaft (9) is a transmission shaft with a universal coupling, and the universal transmission shaft (9) can be telescopic.

9. A tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: The interiors of the tire particle collection bin (1) and the brake particle collection bin (2) are both rounded.

10. The tire and brake exhaust particulate matter collection device according to claim 1, characterized in that: The tire particle collection bin (1), the brake particle collection bin (2) and the intermediate connection bin (6) are all assembled from stainless steel plates, and the assembly points are connected by bolts and sealing pads.

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