最大功率及相应转速KW/rpm: 4.0/3600 最大扭杆及相应转速N.m/rpm: 12/2600 问一下这台机器马力是多少_百度知道
最大功率及相应转速KW/rpm: 4.0/3600 最大扭杆及相应转速N.m/rpm: 12/2600 问一下这台机器马力是多少
铭牌YKT170F/P
面写的是8，怕被骗求帮助;P是13HP的，但是卖家说这个带P的YKT170F&#47.5HP马力
提问者采纳
机器上不好看出来
最好自己做个测试现在很多标签上的东西都不真实
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出门在外也不愁90.4kw/6300rpm是汽车什么意思_百度知道
90.4kw/6300rpm是汽车什么意思
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90.4kw/6300rpm表示的是汽车的最大功率
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出门在外也不愁From Wikipedia, the free encyclopedia
For other uses, see .
"RPM" and "rpm" redirect here. For other uses, see .
Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min) is a measure of the
of , specifically the number of
in one . It is used as a measure of
of a mechanical component. In the , tr/mn (tours par minute) is the common abbreviation. The
uses the abbreviation U/min or u/min (Umdrehungen pro Minute).
According to the
(SI), rpm is not a unit. This is because the word revolution is a
rather than a unit. The annotation is instead done as a subscript of the formula sign if needed. Because of the measured , the formula sign has to be f for (rotational)
for . The corresponding basic
is s-1 or . When measuring angular speed, the unit
Even though angular velocity, angular frequency and
have the dimensions of s-1, angular velocity and angular frequency are not expressed in hertz, but rather in the more appropriate angular unit . Thus a disc rotating at 60 rpm is said to be rotating at either 2π rad/s or 1 Hz, where the former measures the angular velocity and latter reflects the number of revolutions per second. The conversion between a frequency f in hertz and an angular velocity ω in radians per second are:
Main article:
On many kinds of disc recording media, the rotational speed of the medium under the read head is a standard given in rpm. , for example, typically rotate steadily at 16 2/3, 33 1/3, 45 or 78 rpm (5/18, 5/9, 3/4, or 1.3 Hz respectively).
Modern ultrasonic
can rotate at up to 800,000 rpm (13.3 kHz).
The "second" hand of a conventional analogue clock rotates at 1 rpm.
players read their discs at a precise, constant rate (4.3218 Mbit/s of raw physical data for 1.4112 Mbit/s (180.6 kB/s) of usable audio data) and thus must vary the disc's rotational speed from 8 Hz (480 rpm) when reading at the innermost edge, to 3.5 Hz (210 rpm) at the outer edge.
players also usually read discs at a constant linear rate. The disc's rotational speed varies from 25.5 Hz (1530 rpm) when reading at the innermost edge, to 10.5 Hz (630 rpm) at the outer edge.
A 's drum may rotate at 500 to 2000 rpm (8–33 Hz) during the spin cycles.
A power generation turbine () rotates at 3000 rpm (50 Hz) or 3600 rpm (60 Hz), depending on country – see .
are typically operated around
rpm (33–50 Hz) when cruising, with a minimum (idle) speed around 750–900 rpm (12.5–15 Hz), and an upper limit anywhere from 4500 to 10,000 rpm (75–166 Hz) for a road car or nearly 20,000 rpm for racing engines such as
(currently limited to 15,000 rpm). The exhaust note of
have a much higher pitch than an , because each of the cylinders of a
fires once for every two revolutions of the . Thus an eight-cylinder engine turning 300 times per second will have an exhaust note of ;Hz.
typically rotates at a rate between 2000 and 3000 rpm (30–50 Hz).
typically rotate at 5400 or 7200 rpm (90 or 120 Hz), the most common speeds for the
or -based drives in consumer models. High-performance drives (used in fileservers and enthusiast-gaming PCs) rotate at 10,000 or 15,000 rpm (160 or 250 Hz), usually with higher-level SATA,
interfaces and smaller platters to allow these higher speeds, the reduction in storage capacity and ultimate outer-edge speed paying off in much quicker access time and average transfer speed thanks to the high spin rate. Until recently, lower-end and power-efficient laptop drives could be found with 4200 or even 3600 rpm spindle speeds (70 and 60 Hz), but these have fallen out of favour due to their lower performance, improvements in energy efficiency in faster models and the takeup of
for use in slimline and ultraportable laptops. Similar to CD and DVD media, the amount of data that can be stored or read for each turn of the disc is greater at the outer edge t however, hard drives keep a constant rotational speed so the effective data rate is faster at the edge (conventionally, the "start" of the disc, opposite to CD/DVD).
drives typically ran at a constant 300 or occasionally 360 rpm (a relatively slow 5 or 6 Hz) with a constant per-revolution data density, which was simple and inexpensive to implement, though inefficient. Some designs such as those used with older Apple computers (Lisa, early Macintosh, later II's) were more complex and used variable rotational speeds and per-track storage density (at a constant read/record rate) to stor for example, between 394 rpm (with 12 sectors per track) and 590 rpm (8 sectors) with the Mac's 800 KB double-density drive at a constant 39.4 KB/s (max) – vs. 300 rpm, 720 KB and 23 KB/s (max) for double-density drives in other machines.
for enriching uranium spins at 90,000 rpm (1,500 Hz) or faster.
engines rotate at tens of thousands of rpm.
model aircraft turbines are capable of over 100,000 rpm (1,700 Hz) with the fastest reaching 165,000 rpm (2,750 Hz).
system works at 60,000–200,000 rpm (1–3 kHz) range using a passively magnetic levitated flywheel in vacuum. The choice of the flywheel material is not the most dense, but the one that pulverises the most safely, at surface speeds about 7 times the speed of sound.
A typical 80 mm, 30 CFM computer fan will spin at 2,600–3,000 rpm on 12 V DC power.
can reach 290,000 rpm (4,800 Hz), while 80,000–200,000 rpm (1–3 kHz) is common.
Molecular microbiology - molecular engines. The rotation rates of bacterial flagella have been measured to be 10,200 rpm (170 Hz) for Salmonella typhimurium, 16,200 rpm (270 Hz) for Escherichia coli, and up to 102,000 rpm (1,700 Hz) for polar flagellum of Vibrio alginolyticus, allowing the latter organism to move in simulated natural conditions at a maximum speed of 540 mm per hour.
, or CAV, used when referring to the speed of gramophone (phonograph) records
, or CLV, used when referring to the speed of audio CDs
. DVD Technical Notes. Moving Picture Experts Group (MPEG). .
. Formula One.
. The Electricity Forum.
. JetCat USA.
Post, Richard F. (April 1996).
(PDF). Science & Technology Review (University of California): 12–19.  .
Magariyama, Y.; Sugiyama, S.; Muramoto, K.; Maekawa, Y.; Kawagishi, I.; Imae, Y.; Kudo, S. (October 27, 1994). "Very fast flagellar rotation". Nature 371 (6500): 752. :. :.
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