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What is a flywheel housing? What is the function of the flywheel∏ housing

  • Time of issue:2021-08-13

What is a flywheel housing? What is the function of the flywheel housing

(Summary description)　

The flywheel housing is installed between the engine and the gearbox, externally" connected to the crankcase, starter, and oil pan, with a built-in flywheel assemblyπ, which serves as a connection to the body, protection and carrier.

　　The main function of the flywheel housing is to realize the effective connection be←tween the engine and the transmission. Through its changes, the same type of en"gine can be equipped with different types of cars to meet market demand.

　　The size of the connecting surface of the same series of flywh←eel housings is basically the same as that of the connectin•g surface of the engine, but it is different from the connecting surf∞ace of the clutch, but has the same functional holes.

　　Generally, the flywheel shell is shaped like a basin, and its structure is characterize&d by large dimensions, with a maximum diameter of up to 60‌0mm and a height of nearly 300mm. Most flywheel shells are made of g±ray cast iron casting blanks. The material structure is characterized by uneven wa∑ll thickness. Generally, the wall thickness is 6-8mm, the thinnest part is only↔ 5mm, and the maximum wall thickness is up to 40mm. The area of ​​the two ‍surfaces connected to the engine and the clutch is large, and ↕it is easy to deform during die-casting, and the amount of deformation is not™ easy to control, so the connecting holes on the two surfaces must be machined. In orde r to ensure that the flywheel housing has good stability and tightness ₽during operation, detailed technical requirements are set on its important surfacesπ and holes.

The flywheel housing includes a housing, a support plate, a♦nd bolts. There are screw holes on both sides of the housing, and bolt holes are opened on the supp ort plate. The bolts pass through the bolt holes on₩ the support plate and are screwed into the housing. In♦ the screw hole, connect the support plate to the shell.

　　 The number and position of the threaded holes on÷ the support plate are determined according to the matching installation requiremΩents of the engine. The utility model aims to provide a flywheel shell which can βadapt to the matching installation requirements by replacing ↑the supporting plate. The flywheel shell can be use d universally, reduce molds and tooling, increase the batch size<, reduce the types of accessories, save production mana$gement, financial management, and storage management costs, and reduce costs.

　　 flywheel shell function

　　 At least one heat dissipation window is provided on the flywheel housing, and a wate≠rproof cover is provided on the heat dissipation window. The function of♣ the flywheel shell is to have the functions of heat dissipation and metal powder removal, simple ™structure, easy to install, accommodate the clutch assembly, bear the weight of the tra♦nsmission, and play the role of power transmission fulcrum.

　　The function of the flywheel housing is to bear weight, position the engine and transmission, and‌ place the lifting parts. Although it does not have much wear, its da•mage and misalignment also have a great impact on the engine.

　　As the flywheel shell bears weight and external force, c≈racks and deformation will inevitably occur. After the flywheel shell is deformed, i←ts parallelism and the center of the bearing hole lose their oεriginal accuracy, that is, the bearing hole of the f↕lywheel shell cannot be concentric with the center of the crankshaft and th<e center of the transmission, causing the engine and the transmission center to deviate. This will λaffect the transmission of power. The wear of the driven part will al×so increase, and abnormal transmission noise will occur. The misalignment o≈f the two planes of the flywheel housing will also ca↕use unnecessary wear to the mechanical parts of the driven• part, such as the wear of the clutch plate, the driving axle o☆f the transmission, and the bearing.

　　 In order to make the centerline of the engine cra★nkshaft coincide with the centerline of the transmission drive shaft, the flywheel housing is eβquipped with a plane and a center positioning device. For example, the plane of th₹e cylinder block and the plane of the flywheel housing, the driving wheel cover o₽f the transmission and the bearing hole of the flywheel housing are guaranteed to be paralle×l and concentric. Therefore, in addition to paying attention to the co"ncentricity of the crankshaft and the flywheel, it is necessary to strictly adjust and re¥pair several datum surfaces or holes of the flywheel housing during the war"ranty.

　　 Because although the flywheel housing is a singl'e body, its bearing hole center and plane are the same as the cylinder block. Therefore, the basic₽ part of the flywheel housing cannot be ignored in the warranty.

　　 flywheel housing is generally suitable for flywheel compδonents of electronically controlled diesel engines for vehicles.

  • Time of issue:2021-08-13
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Information

　

The flywheel housing is installed between the engine and the &gearbox, externally connected to the crankcase, starter, and oil pa​n, with a built-in flywheel assembly, which serves as a connection to the body, protection ↑and carrier.

　　The main function of the flywheel housing is to realize the effec"tive connection between the engine and the transmission. Through its c‌hanges, the same type of engine can be equipped with different types of cars to meet market d→emand.

　　The size of the connecting surface of the same series of flywheel♥ housings is basically the same as that of the connecting surface ofβ the engine, but it is different from the connecting surf∑ace of the clutch, but has the same functional holes.

　　Generally, the flywheel shell is shaped like a basin, a§nd its structure is characterized by large dimensions, with♠ a maximum diameter of up to 600mm and a height of nearly 300m'm. Most flywheel shells are made of gray cast iron casting blanks. The material struct¶ure is characterized by uneven wall thickness. Generally, the wall thi•ckness is 6-8mm, the thinnest part is only 5mm, and the maximum wall αthickness is up to 40mm. The area of ​​the two surfaces connected to the engine and the cl→utch is large, and it is easy to deform during die-casting, and the amo"unt of deformation is not easy to control, so the connecting holes on the two surfaces mus♣t be machined. In order to ensure that the flywheel housing has good stability and tiπghtness during operation, detailed technical requirements are set on its important su♣rfaces and holes.

The flywheel housing includes a housing, a support plate, and bolts. There are screw hol©es on both sides of the housing, and bolt holes are opened on the support plate. The boltπs pass through the bolt holes on the support plate and are screwed into the housing. In theλ screw hole, connect the support plate to the shell.

　　 The number and position of the threaded holes on the support plate are determinΩed according to the matching installation requirements of the engin♥e. The utility model aims to provide a flywheel shell✔ which can adapt to the matching installation requirement$s by replacing the supporting plate. The flywheel shell can be used universally∞, reduce molds and tooling, increase the batch size, reduce the types of accessories, save product•ion management, financial management, and storage management costs, and reduce cos ts.

　　 flywheel shell function

　　 At least one heat dissipation window is provided on the flywheel housing, and a wa≥terproof cover is provided on the heat dissipation window. The function of the flywheel shell is★ to have the functions of heat dissipation and metal powder removal, simple stεructure, easy to install, accommodate the clutch assembly, bear the weiδght of the transmission, and play the role of power transmission fulcrum.

　　The function of the flywheel housing is to bear weight, p≥osition the engine and transmission, and place the lifting parts. Althoφugh it does not have much wear, its damage and misalignment also have a ‍great impact on the engine.

　　As the flywheel shell bears weight and external force, cracks and ≠deformation will inevitably occur. After the flywheel shell is deformed≥, its parallelism and the center of the bearing hole lose their oriσginal accuracy, that is, the bearing hole of the flywheel shell cannot be con∞centric with the center of the crankshaft and the center of the transmission, causing the engin≈e and the transmission center to deviate. This will affect the trans¶mission of power. The wear of the driven part will also increase, and abnormal transmission ≥noise will occur. The misalignment of the two planes of the flywh₹eel housing will also cause unnecessary wear to the mechanical parts of the driven part, such☆ as the wear of the clutch plate, the driving axle of the transmission, and the bearing.

　　 In order to make the centerline of the engine crankshaf★t coincide with the centerline of the transmission drive shaft, the flywheel housing is equip£ped with a plane and a center positioning device. For example, the plane of the cylinder block and₽ the plane of the flywheel housing, the driving wheel cover of the transmission "and the bearing hole of the flywheel housing are guaranteed to be parallel and concentric. The¥refore, in addition to paying attention to the concentricity of the crankshaft and the÷ flywheel, it is necessary to strictly adjust and repair ‍several datum surfaces or holes of the flywheel housπing during the warranty.

　　 Because although the flywheel housing is a single body, its bearing hole center a₹nd plane are the same as the cylinder block. Therefore, the basic part of the flywheel hous♦ing cannot be ignored in the warranty.

　　 flywheel housing is generally suitable for flywheel componen♦ts of electronically controlled diesel engines for ve₩hicles.

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Advantages of flat welding flange [ 2021-08-13 ]
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The principle and characteristics of the use of flanges [ 2021-08-13 ]
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According to function and purpose 　　 According to∞ the different functions of the valve, it can be divided into the f↑ollowing five types: 　　①Shutoff valve 　　 shut-off valve is also called cl✔osed-circuit valve, its function is to connect or cut off the medium in the pipeline. Block valv¥es include gate valves, globe valves, plug valves, ball$ valves, butterfly valves, and diaphragm valves. 　　②Check va&lve 　　 Check valve is also called one-way valve or check valve, its function is to prevent the b$ack flow of the medium in the pipeline. For example, the suction valve of the water pump belo ngs to the non-return valve category. 　　③Safety valve 　　 The role of safety valves is to pr<event the pressure of the medium in the pipeline or device from exceeding the speci fied value to protect the safe operation of subsequent equipment. 　　④Regulating va<lve 　　The function of the regulating valve is to regulate the pressure, flow and other parameters 'of the medium. 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Usually refers to a valve with a →leakage rate of less than one part in 100,000. 　　⑤Divert valve 　　 The diverter valve includes v★arious distribution valves and flow valves, etc., who₩se function is to distribute, separate or mix the medium in the pipeline. 　　2. Accord∏ing to the valve drive mode 　　According to the valve drive mode,∑ it can be divided into the following three types: 　　①Automatic valve 　　 refers to valves th>at do not require external drive, but rely on the energy of the medium to act‍uate the valve, such as safety valves, pressure reducing valves, trap"s, check valves, automatic control valves, etc. 　　②Power driven valve 　　The power-d♣riven valve can be driven by various power sources. 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According to the valve body materia‌l 　　①Metal material valve 　　The valve body and other parts are made of meta₽l materials, such as cast iron valves, carbon steel valves, alloy steel valves, copper alloy↓ valves, aluminum alloy valves, lead alloy valves, titanium alloy va≤lves, Monel alloy valves, etc. 　　②Non-metallic valve 　　The valve body and other ↓parts are m
What is the role of calipers [ 2021-08-13 ]
The caliper can also be called a brake cylinder. There are a lot of pistons ins∑ide the caliper. The function of the caliper is to push the brake pads to clamp the bra∑ke disc, so that the car can slow down. After the brake pads clamp the br>ake disc, the kinetic energy can be converted into heat en↕ergy. The brake system is a vital system in a car. The brake  system is related to the driving stability and driving safety factor of the car. Th>e key components of the brake system include vacuum booster pump, brake master cylinder, br≤ake cylinder, brake pads, and brake discs. Brake pads an★d brake discs are basically wearing parts that need to be replaced on a regular basis. As the ₹driving distance of the car increases, the brake pads and brake ≤discs will basically continue to wear. After the brake ✘pads and brake discs are worn to a certain degree, they need to be rep'laced. If they are not replaced, the braking distance ₩will be affected. After the driver steps on the brake pedal, th<e master cylinder can push the brake cylinder through the brake fl®uid. At this time, the brake cylinder can push the brake pad's to clamp the brake disc. The vacuum booster pump provides power assist≠ance, and the vacuum booster pump allows the driver to easily ste€p on the brake pedal. The brake fluid in the brake system needs to be replac÷ed regularly. If it is not replaced for a long time, it will affect the braking force and b♠raking distance. Brake fluid is a kind of fluid that is ≠easier to absorb water. When the water content of the brake fluid reaches 3%, it needs to be ©replaced. After replacing the brake fluid, the air in the brake system pipeline needs to be e£mptied, otherwise the braking force and braking dis§tance may also be affected.
　　 We have seen many products using gears in our lives, but do& you know what principle they use gears? According to its working principle,→ 　　 gear has the following functions: First, gears can transmit mechanical power, su§ch as automobile gear shifting devices, industrial gearboxes, etc.; second, gears ca≠n change the direction of movement, such as mechanicaλl watches, shaking head devices in electric fans, etc.; ₹third, gears can reduce speed and Improve torque, such♦ as motor reducer, various speed change mechanisms, etc. 　　Gear transmission m∏echanism 　　 Here are two interesting applications of gears in auto mobiles and aviation, let's take a look at the role of gears in them. 　　 There is a mech₹anical structure in a car called a differential, which is an extremely ∞important part. When a car turns, the speeds of the inner and outer₹ wheels are different. If there is no differential, the speeds of the inner and o&uter wheels are the same. The wheels slip and roll over. Moreover,  the speed of the car is very fast, and it is absolutely impossible to have no differ£ential at high speeds. The gear here is on the differentλial, which can not only transmit the power of the engine, but also reduce the speed t£hrough the different speed ratios of the gear device, and at the same time can achieve a very co'ol "differential" function. 　　 three-dimensional model of differential 　　In aviation, helicoΩpters using coaxial reversal technology are favored by many countries because of  their excellent performance. This helicopter has two propellers on the same shaft. When the♦ plane is flying, the rotation direction of the two propellers must be opposite to ensu¶re the power balance of the plane. 　　Helicopter using coaxial reversal technology 　　 From the thr®ee-dimensional model of the coaxial reversal structure, it can be seen that after two tra©nsformations of the gear, the mechanical transmission directionε is smoothly changed, and two different rotation directions are realized on the sam♠e shaft.
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