What does the maximum speed mean?

Question 1: What does the speed of 35,000 rpm mean? Rotational speed: The number of times an object making circular motion rotates around the center of a circle per unit time is called rotational speed, which is different from frequency.

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Represented by symbol n; Its international standard unit is r/S (revolutions per second) or r/min (revolutions per minute), and it is also expressed by RPM (revolutions per minute). It is mainly adopted in Japan and Europe, and China adopts international standards. When the unit is r/S, it is numerically equal to the frequency, that is, n=f= 1/T, and t is the period of circular motion. The linear velocity corresponding to a point on the circumference is v=2π*R*n, and r is the rotation radius corresponding to this point.

Common speeds are: rated speed and maximum speed.

The international unit of centrifuge is g.

The formula for changing the rotational speed r/min into g: RCF =1.12 *10 (-5) * r * (r/min) 2.

Rated speed

Rated speed refers to the maximum speed under rated power, which is usually marked on the obvious part of the product as the main parameter when the product leaves the factory.

full speed

The maximum speed is the maximum speed that can be achieved under certain conditions. Such as the spindle speed of the motor in the hard disk, that is, the maximum speed that the hard disk can reach under normal working voltage. Rotational speed is one of the important parameters to mark the grade of hard disk and one of the key factors to determine the internal transmission rate of hard disk, which directly affects the speed of hard disk to a great extent. The faster the rotation speed of the hard disk, the faster the hard disk can find files, and the relative transmission speed of the hard disk has also been improved.

The electronic speedometer consists of a speed sensor and a meter head (display). Most of the output pulse signals can be matched with the voltage and current input pointer table and digital table through frequency-current conversion, or directly sent to PLC. The frequency-current conversion methods include resistance-volume method, charge pump method and ASIC method. The first two methods are also used in magnetoelectric tachometer. Most ASIC are a combination of resistance-volume division method and charge pump method.

Frequency operation

When there are certain requirements for display accuracy, reliability, cost and flexibility, the pulse frequency can be directly used to run the tachometer.

Frequency operation methods include timing counting method (frequency measurement method), fixed number timing method (period measurement method) and synchronous counting timing method.

The measurement error of timing counting method (frequency measurement method) is 1, which is large at low speed; Fixed number timing method (periodic measurement method) also has an error of 1 time unit, and the error is also great at high speed.

The synchronous counting and timing method combines the advantages of the above two methods and achieves high accuracy in the whole measurement range. This method is basically used for tachometers over 50 thousand.

Question 2: What is the engine speed and what does it mean? What are the maximum engine speed, target engine speed and initial engine speed? Theoretical speed can also be called this,

Is it the primary stage? The speed set by the factory staff is based on this to refer to the data.

Question 3: What does the maximum torque speed mean? The greater the torque, the better the acceleration performance. The vehicle with the largest torque at low speed has better starting acceleration performance. Torque only indicates the output power of the engine at a certain speed. For example, the latest Beijing Hyundai Elantra 1.8L car has a maximum torque of 162 nm/4500 rpm, which means that when the engine speed is 4500 rpm, the maximum torque of 1.8L Elantra is 162 nm. Another example is Audi A6 1.8T of FAW-Volkswagen, and its maximum torque is 210 nm/1750 rpm-4600 rpm. That is to say, when the engine speed of Audi car is kept between 1750 and 4600 rpm, the maximum output torque is 265430 rpm.

Power refers to the work done by an object in unit time. The greater the power, the higher the speed and the higher the maximum speed of the car. Maximum power is often used to describe the dynamic performance of a car. The maximum power is generally expressed in horsepower (PS) or kilowatt (kw), and 1 horsepower is equal to 0.735 kW.

Torque: Torque is the force that makes an object rotate. The torque of the engine refers to the torque output by the engine from the crankshaft end. Under the condition of constant power, it is inversely proportional to the engine speed. The faster the engine speed, the smaller the torque, and vice versa, which reflects the load capacity of the car in a certain range.

For example: maximum power (kw) 80/6000

Maximum torque (nm) 153/4400

The maximum power (kw) of 80/6000 kw (r/min) of 80 (6000) means that the maximum power is 80 kW at 6000 rpm.

The maximum torque N.m(r/min) 153(44 000) means that the maximum torque 153 N is reached at 44 00 rpm. rice

Torque: Torque is the force that makes an object rotate. The torque of the engine refers to the torque output by the engine from the crankshaft end. Under the condition of constant power, it is inversely proportional to the engine speed. The faster the engine speed, the smaller the torque, and vice versa, which reflects the load capacity of the car in a certain range.

For example, the maximum torque (N.m) of a car is 143/4800, that is, it reaches the maximum torque 143 N at 4800 rpm, that is, the maximum torque peak speed of the car is at 4800 rpm.

Question 4: Is the maximum power speed as small as possible or as large as possible? The torque of 5 minutes is the power output, and the speed is the speed of the engine. Low speed and high torque mean better overall performance and stronger dynamic performance. There is high torque output at low constant speed, and the peak torque of the basic car is about 3000-4000 rpm.

1. rotational speed: the number of times an object makes a circular motion around the center of a circle per unit time is called rotational speed (different from frequency).

2. Rated speed refers to the maximum speed under rated power, which is usually marked on the obvious part of the product as the main parameter when the product leaves the factory.

Question 5: What determines the maximum engine speed? The rotational speed mainly depends on the structural design of the engine. High-speed engine has short connecting rod and thin crankshaft. Small torque.

The other is to increase the amount of mixed oil and gas, and only a large amount of oil and gas can achieve high speed.

Increasing the intake area of the throttle and increasing the fuel supply can increase the speed.

Question 6: What is the maximum torque and speed? Personally, I think your understanding is a little biased. 1. Rotation speed is the number of revolutions per unit time, while torque is the work done per unit distance. The two concepts are different, so you can't say that the maximum speed determines the maximum torque, or you will better understand that the power design of the engine itself determines its maximum speed and maximum torque. 2. In the above example, the maximum torque is 230 Nm, which occurs between the engine speed 1950-4500, so theoretically, the maximum torque can be obtained by controlling the speed; When the total power is constant, the higher the speed, the lower the torque. For example, under the same conditions, when you increase the speed to a maximum of 5500 rpm, the car will have a feeling of insufficient power.

Question 7: What does the speed mean? Rotational speed is the number of revolutions per minute of the engine. Idle speed is generally similar. 1000 rpm up and down

Question 8: What is the highest self-priming speed of the pump? What does this mean? How to determine the maximum pump speed is determined by the motor. Self-priming means that the pump itself can absorb water in vacuum, so the self-priming speed refers to the working speed of the pump, because the loss is generally less than the motor speed. As for the highest pump speed, it is definitely the highest motor speed, but it may also be related to the material and performance of the pump casing of the pump shaft impeller. Look at the professional questions you ask. Why? Want to buy a pump? You can consider our Willard pump!

Question 9: Maximum power and maximum power rotation speed The maximum power rotation speed refers to the rotation speed when the engine exerts its maximum power. So different types of engines have different designs. Although the maximum power may be similar (the maximum power of cars with similar displacement is also similar), the maximum power speed will be different. That is to say, Tiida pulls the engine to 5600 rpm, and the engine can exert its maximum power, while Langlang has to pull it to 6300 rpm.

It doesn't matter which is better, because the maximum power speed is a matter of the design idea and style of the car body. A little higher or lower will not affect the use, because you don't need this maximum power speed at all in use, and it will be about 2000 rpm for manual transmission, and the shift speed of cvt or other automatic transmissions will not be higher than 3000 rpm. All kinds of cars are already 165438+ at the top 3000 rpm.