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What are the functions of gears

  • Time of issue:2021-08-13

What are the functions of gears

(Summary description)　　

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, such a§s automobile gear shifting devices, industrial gearboxes, etc.; second, gears can cha→nge the direction of movement, such as mechanical watch≈es, shaking head devices in electric fans, etc.; third, gears can reduce speed and Improve t∞orque, such as motor reducer, various speed change mechanisms, ₩etc.

　　Gear transmission mechanism

　　 Here are two interesting applications of gears 'in automobiles and aviation, let's take a look at the role of gears in them.

　　 There is a mechanical 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 n<o differential, the speeds of the inner and outer wheels are ★the same. The wheels slip and roll over. Moreover, the "speed of the car is very fast, and it is absolutely impos©sible to have no differential at high speeds. The gear here is on the differential, which can÷ not only transmit the power of the engine, but alsδo reduce the speed through the different speed ratios of the gear device, and at the s♣ame time can achieve a very cool "differential" function.

　　 three-dimensional model of differential

　　In aviation, helicopters using coaxial reversal technology are favored by many c↔ountries because of their excellent performance. This helicopter has two prop₹ellers on the same shaft. When the plane is flying, the rotation direction of the two propelle×rs must be opposite to ensure the power balance of the plane.

　　Helicopter using coaxial reversal technology

　　 From the three-dimensional model of the coaxial reversal ∞structure, it can be seen that after two transformations §of the gear, the mechanical transmission direction is smoothly changedβ, and two different rotation directions are realized on the same shaft.<

  • Time of issue:2021-08-13
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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, such as automobile gear shifting devices, industrial g₽earboxes, etc.; second, gears can change the direction of movement, such as mechanical watches, sha©king head devices in electric fans, etc.; third, gears can re↓duce speed and Improve torque, such as motor reducer, var✔ious speed change mechanisms, etc.

　　Gear transmission mechanism

　　 Here are two interesting applications of gears in au≈tomobiles and aviation, let's take a look at the role of gears in them.

　　 There is a mechanical structure in a car called a differential, which is an extr€emely important part. When a car turns, the speeds of t₹he inner and outer wheels are different. If there is no differential, the speeds of the inneαr and outer 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 differential at high spee↕ds. The gear here is on the differential, which can not o>nly transmit the power of the engine, but also reduce the speed through the different speed ratios ↕of the gear device, and at the same time can achieve a very cool &quoπt;differential" function.

　　 three-dimensional model of differential

　　In aviation, helicopters using coaxial reversal technology are favor'ed 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 t÷wo propellers must be opposite to ensure the power balance of the plane.

　　Helicopter using coaxial reversal technology

　　 From the three-dimensional model of the coaxial reversal structure, i₩t can be seen that after two transformations of the gear, the mσechanical transmission direction is smoothly changed, and two different rotation ≤directions are realized on the same shaft.

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　　 The neck height of the neck flange is low, which can improve the rigidity and load-beaβring capacity of the flange. Compared with the butt-welde•d flange, the welding workload is large, the electrode consumption is high, and i•t cannot withstand high temperature and high pressur↑e, repeated bending and temperature fluctuations, but tβhe on-site device is more convenient, and the process of welding seam₩ scratching can be omitted, which is more popular. Butt welding flange with neck: neck  flange welding is usually called "high hub" flange. Its purpose is to transfer ✔the pressure of the pipeline, thereby reducing the $high stress concentration in the flange base. Neck flange welding is a gδood design for butt welding those flanges that are provided due to their own con≤structive value. However, the price is relatively high because of the complicated production pr∏ocess of the product. Threaded (threaded) flange: The threaded flange is connecte d by threaded fasteners. But the center of the product has a t₹hread size corresponding to the pipe. Its main advantage is that it can be assembled w≈ithout welding. Sliding flange: Sliding flange has a lower hub, because t☆he pipe enters the single flange before welding. This is ₩to provide sufficient strength inside and outside the welding to avoid leakage. Slidi ng flanges are matched with boring pipes with slightly larger outer d✔iameters. They are better than neck flange welding λdue to lower initial cost. flange Many users, but the cost of the latter device wi ll not be low, due to the increase in the number of weld neck flanges, lap flange: in practice, ≤the lap flange is the same complete sliding flange, unless it is in the hole a£nd A radius between flange races. It is necessary for the radius €to have the flange to contain the lap stub to complete. Usually, the lap flange an☆d the lap stub end mating together will assemble the system. The soc÷ket welding flange is a similar sliding flange, unless it has a hole and a counter hole size. T©he matching of the counter hole and the pipe allows$ the pipe to be inserted into a sliding flange similar to the flange. The diameter of the ∞smaller hole is matched with the same pipe with the same ID. The restriction± is a built-in hole that stays at the bottom as a shoulder sleeve designed for pipes. This elimi↔nates any flow restrictions when using socket welding flanges.
　　1. In order to compact the sealing surface of the flat welding flange, ​only a small pressure is required. As the required pressure drops, ≥the size of the bolts and the number required are correspondingly redu≠ced. After all, a plan is planned. A flat welding flange p‍roduct with a relatively small volume and a relatively light weight. 　　 2. The pro'duction of flat welded flanges can save data and reduce costs. When t∑he raw material of the pipe is special and the price is high, the cos<t of welding the flange of the same raw material will be high, ✔and the use of this flange can effectively save the cost of materials. Conducive to constructionγ, when connecting, the bolt holes of the flange are inconvenient to align or to avoid repl®acing the flange bolt holes of the equipment, etc.,& the use of this flat welded flange is very suitable₹.         3. The flat welding flange can save space and reduce weight₹ in the process of use. The most important thing is to ensure that the head part will not le€ak. It has a very outstanding sealing function. The reason why the size of the Ωcompact flange is reduced is because The diameter $of the seal is reduced, which will reduce the cross-section of the‌ sealing surface. Also, the flange gasket has now been® replaced by a sealing ring to ensure an outstanding matching of the flat welded flange seal facinπg the sealing surface. 　　 flat welding flange 　　 But it als±o has some disadvantages: 　　 Disadvantages of flat welding f•lange: 　　The main design disadvantage of flat welded flanges &is that it cannot ensure no leakage. This is the lack of its planning: the connecγtion is dynamic, and for example, thermal expansion and fluctuating cyc≥lic loads will cause movement between the flange surfaces, whic∞h will affect the function of the flange, which will damage the integrity of the flange and eventua♠lly lead to leakage. It is impossible for any product t≈o be without shortcomings, just try to control the lack of ≠products to the minimum, so the company tries to perfect the♥ functions of the products when producing flat welded fl<anges to make them play the greatest role.
      Flange work characteristics: 　　Flange work characteristics: 　　 1. A self-control 'butterfly valve that can be remotely controlled, which  also has the characteristics of a flanged butterfly v☆alve, and can be equipped with a wide range of butterfly v☆alves; 　　2. The power supply is the driving energy of t≈he butterfly valve, with a wide range of power sources, wide applica✘tion range, saving human resources, and having work efficiency; 　　3. Convenient operation anδd easy to meet various control requirements. It canδ be realized by selecting different actuators, signal feedback, flow adjustment, ex♣plosion-proof and other functions; 　　4. Ultra-miniaturization ca"n be realized, mechanical self-locking can be realiz✔ed, and different sealing rings can be changed to mee t different working conditions. 　　The working principle of flange: 　　Using the actuator t®o input a standard signal of 0-10 mA, the motor group drives the gear, worm, and★ torque to drive the disc to rotate. When the valve is in the fully open position, the thickness of↔ the butterfly plate is the resistance of the medium flowinλg through the valve body, so the pressure drop generated by the valve≠ is small, so it has better flow control characteristics. 　　Butterfly v♠alve has two sealing types: elastic seal and metal seal. For elastic sealing≠ valves, the sealing ring can be embedded on the valve body or att←ached to the periphery of the butterfly plate. The valv↑e with metal seal generally has a longer life than the valve with elastic seal, but it is dif×ficult to achieve a complete seal. Metal seals can adapt to higher operating temperatu→res, while elastic seals have the defect of temperature limitationγ. If flanged butterfly valves are required to be used as f low control, the main thing is to correctly select the size and type of 'the valve.
　The valve is an accessory of the pipeline, used to control the flow, pressure, and direction of& the fluid. The fluid to be controlled can be liquid, gas, gas-liquid mixture or solid-liquid ₩mixture.   one. Basic parameters of valve 　　The basic parameters of the valve include working pre$ssure (PN), working temperature (T) and nominal diameter (DN). ♠For various valves equipped on pipelines, nominal pressure and nominal di$ameter are commonly used as basic parameters. Nominal pressure refers to the m≠aximum working pressure that a valve of a certain material can withs‌tand at a specified temperature. The nominal diameter  refers to the nominal inner diameter of the connecting end ↑of the valve body and the pipeline. Valves, pipelines and pipeline accessories of the♣ same nominal diameter can be connected to each other, which is interc&hangeable.   two. Valve classification 　　 1. According to function and purpose≠ 　　 According to the different functions of the valve, it caλn be divided into the following five types: 　　①Shutoff valve 　　 shut-off valve is also calleγd closed-circuit valve, its function is to connect or cut off the medium in the pipelin e. Block valves include gate valves, globe valves, plug÷ valves, ball valves, butterfly valves, and diaphragm valves. 　　②Check valve 　　φ Check valve is also called one-way valve or check valve, its function is to♠ prevent the back flow of the medium in the pipeline. For example, the suction val've of the water pump belongs to the non-return valve category. 　　‍③Safety valve 　　 The role of safety valves is to prevent the pressure of the medium in the αpipeline or device from exceeding the specified 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 parameter±s of the medium. The regulating valve has different c&lassification methods. According to the purpose and function, t×he regulating valve can be divided into: 　　 (1) Two-position valve. The two-posiπtion valve is mainly used to close or connect the medium. 　　 ☆(2) Regulating valve. The regulating valve is mainly used for regulat₩ing the coefficient. When selecting the valve, the flow ch aracteristics of the regulating valve need to be determined; the regula≤ting valve can be divided into the following forms accordin g to the structure: single-seat regulating valve; double-se®at regulating valve; sleeve regulating valve; angle regulating Valve; three-way regulating va≥lve; diaphragm valve; butterfly valve; ball valve; eccentric rotary valve. 　　 (3) Shut-¶off valve. Usually refers to a valve with a leakage rate of less than one part© in 100,000. 　　⑤Divert valve 　　 The diverter valve includes va±rious distribution valves and flow valves, etc., whose αfunction is to distribute, separate or mix the medium in the pipeline. 　　2. Acc≠ording to the valve drive mode 　　According to the valve drive mod®e, it can be divided into the following three types: 　　①Automatic valve 　　 refers to valv×es that do not require external drive, but rely on the energy of the medium to actuγate the valve, such as safety valves, pressure reducing valves, traps, check valves, automatic co↔ntrol valves, etc. 　　②Power driven valve 　　The power-driven valve can be driven by variousπ power sources. Including electric valves driven by electricity, pneumatic valv→es driven by compressed air, hydraulic valves driven by hydraulic pressure su ch as oil, and combinations of various driving methods, such as pneumatic-electric valves. 　　③™Manual valve 　　Manual valves use handwheels, handles, levers, sprockets and other component$s to manipulate the valve action by manpower. When the valve closing torque¶ is large, a gear or turbo reducer can be set between the handwheel and the valve stem. If necess>ary, universal joints and drive shafts can also be used for lo₩ng-distance operation. 　　3. Press the connection method 　　 can be divided into th★e following six types according to the connection method: 　　①Threaded c¶onnection valve: The valve body has an internal thread or  an external thread to connect with the pipe thread; 　　②Flange connection valve: the≥ valve body has a flange to connect with the pipeline flange; 　　★③Welding connection valve: The valve body has a weldin'g groove and is welded to the pipeline; 　　④Clamp-connected valve: t♦he valve body has a clamp to connect with the pipe clamp; 　　⑤ Card sleeve connection valve:× It is connected with the pipeline by a card sleeve; 　　⑥Wafer co≤nnection valve: a connection form in which the valve and the tw"o pipes are directly clamped together with bolts. 　　4. According to the valve body material 　　①§Metal material valve 　　The valve body and other parts are made of metal materia$ls, such as cast iron valves, carbon steel valves, alloy st¶eel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, titλanium alloy valves, Monel alloy valves, etc. 　　②Non-metall÷ic valve 　　The valve body and other parts are m
What is the role of calipers [ 2021-08-13 ]
The caliper can also be called a brake cylinder. There are a lot of pisεtons inside the caliper. The function of the caliper is to push the brake pads to clamp ‍the brake disc, so that the car can slow down. After the brake pads clamp the brake disc≤, the kinetic energy can be converted into heat energy. The brake system is a vita®l system in a car. The brake system is related to th$e driving stability and driving safety factor of the car. The key components of t¶he brake system include vacuum booster pump, brake master cylinder, brake cylinder, brake pδads, and brake discs. Brake pads and brake discs are basically wearing parts that need to be÷ replaced on a regular basis. As the driving distanceΩ of the car increases, the brake pads and brake discs will basically coλntinue to wear. After the brake pads and brake discs are wo×rn to a certain degree, they need to be replaced. If they are not replaced, ‍the braking distance will be affected. After the driver s♥teps on the brake pedal, the master cylinder can p→ush the brake cylinder through the brake fluid. At this time, the brake cylinder can push the ¥brake pads to clamp the brake disc. The vacuum booster pump provides power assistance, and t£he vacuum booster pump allows the driver to easily step on the brake pedal. The brake flui d in the brake system needs to be replaced regularly. If it is not replaced for a long time, it  will affect the braking force and braking distance. Br¶ake 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 emptied, otherwise the brakiφng force and braking distance may also be affected.
　　 We have seen many products using gears in our lives, but do you kβnow what principle they use gears? According to its working princ®iple, 　　 gear has the following functions: First, gears can transmit mechanical® power, such as automobile gear shifting devices, industrial gearboxes, et↓c.; second, gears can change the direction of movement, such as mechanical watches, shaking head d evices in electric fans, etc.; third, gears can reduce speed and Improve §torque, such as motor reducer, various speed change mechanisms, etc. 　　Gear transmission ≈mechanism 　　 Here are two interesting applications  of gears in automobiles and aviation, let's take a look at the role of gears in them÷. 　　 There is a mechanical structure in a car called a differe¥ntial, which is an extremely important part. When a car turns, the speeds of thσe inner and outer wheels are different. If there is no differential, the speeds o₹f the inner and outer wheels are the same. The wheels slip and roll over. Moreover, the speed o€f the car is very fast, and it is absolutely impossible to have no diff•erential at high speeds. The gear here is on the differential,∑ which can not only transmit the power of the engine, but also reduce the speed thro‌ugh the different speed ratios of the gear device, and at the same time can achieve a very cool "di←fferential" function. 　　 three-dimensional model of differential 　　In aviation✘, helicopters using coaxial reversal technology are favored by many countries  because of their excellent performance. This helicopter has t​wo propellers on the same shaft. When the plane is flying, the rot∏ation direction of the two propellers must be opposite to ensure the power balance of the plane. ♥ 　　Helicopter using coaxial reversal technology 　　 From the three-dimensional m&odel of the coaxial reversal structure, it can be seen that after two transformations ≈of the gear, the mechanical transmission direction is smoothly changed, and twβo different rotation directions are realized on the same s₹haft.
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