Valdagi radial siljish nima?

Radial siljish (TIR) — val bir to'liq aylanish davomida val yuzasidan qo'zg'almas tayanch nuqtasigacha bo'lgan masofaning umumiy o'zgarishi. TIR ekssentrisitetning ikki baravariga teng.

Siljishni indikator soat yordamida qanday o'lchash mumkin?

Valni V-shaklli tayanclarga o'rnating, indikator soatni yuzaga perpendikulyar holatda qo'ying, nolga keltiring va bir to'liq aylanish bajaring. Strelkaning umumiy harakat amplitudasi TIR hisoblanadi.

Haddan tashqari radial siljishning sabablari nima?

Asosiy sabablar: egilgan val, ishlab chiqarishdagi ekssentrisitet, podshipnik yurma yuzasining eyilishi, muftani noto'g'ri rostlash va yig'ishdagi xatolar.

Siljish va muvozanatsizlik o'rtasidagi bog'liqlik qanday?

If the mass centre of a rotor is displaced by eccentricity e, the equivalent unbalance is U = e × m, where m is rotor mass. Journal runout can displace the mass centre and thus contribute to unbalance, but measured TIR also includes form error, bend and setup error, so runout and residual unbalance are related yet not equal.

Turli xil qo'llanishlarda qabul qilinadigan siljish qiymatlari qanday?

The geometric runout tolerance comes from the shaft drawing or the manufacturer's specification, not from ISO 21940-11. As a balance-risk screening value, the unbalance-equivalent TIR is about 40 μm at G6.3 / 3000 RPM, about 3.2 μm at G1.0 / 6000 RPM, and about 80 μm at G6.3 / 1500 RPM. Always calculate for your specific conditions and check the drawing tolerance.

Muhandislik uchun bepul vosita

Val Radial Siljishi Kalkulyatori

Estimate the shaft radial runout (TIR — Total Indicator Reading) that corresponds to the ISO 21940-11 residual unbalance limit for your balance quality grade and speed, and screen measured runout for unbalance risk. Note: ISO 21940-11 sets unbalance limits — the geometric runout tolerance itself comes from the shaft drawing or manufacturer specification.

ISO 21940-11 TIR / Ekssentrisitet Balance-Risk Screening

Balans sifati darajasi G

Ish tezligi (RPM)

Shaft Diameter (mm)

Rotor Mass (kg)

O'lchangan radial urib chiqish — optional, for balance-risk screening (μm TIR)

Quick presets

Results

Unbalance-Equivalent TIR (screening value, not a geometric tolerance)

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Ruxsat etilgan ekssentrisitet (e_per)

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Ekvivalent muvozanatsizlik (U_per)

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Burchak tezligi ω

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Balance Grade

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Ruxsat etilgan ekssentrisitet

Balanslashtirish sifati darajasi G va ish tezligidan:

G — balanslashtirish sifati darajasi (mm/s)
n — ish tezligi (RPM)
ω — burchak tezligi (rad/s) = 2πn/60

To'liq ko'rsatkich o'qishi

Soat ko'rsatkichi bilan o'lchangan TIR ekssentrisitetdan ikki baravar katta (tepa-tepadan):

Scope of this check: e_per in ISO 21940-11 is a permissible residual unbalance (mass-centre eccentricity), not a geometric runout tolerance. TIR = 2 × e_per is therefore a screening value: if measured journal runout exceeds it, the mass-centre displacement from runout alone could already exceed the balance limit for the selected G grade. It does not replace the geometric runout tolerance on the shaft drawing, and a shaft with low TIR can still be out of balance (mass distribution), while measured TIR can include form error, bend, bearing seating or setup error that does not translate one-to-one into unbalance.

Ekvivalent muvozanatsizlik

Amaliy Misol

Misol — Nasos vali G6.3, 3000 RPM

Given: Speed = 3000 RPM, Grade = G6.3, Mass = 45 kg, Diameter = 40 mm

ω = 2π × 3000 / 60 = 314.16 rad/s

e_per = 6.3 × 1000 / 314.16 = 20.05 μm

TIR = 2 × 20.05 = 40.1 μm

U_per = 20.05 × 45 = 902.3 g·mm

Unbalance-Equivalent Runout Reference Table (screening values)

Grade	Speed (RPM)	e_per (μm)	Equivalent TIR (μm)
G6.3	750	80.2	160.4
G6.3	1500	40.1	80.2
G6.3	3000	20.1	40.1
G2.5	3000	7.96	15.9
G2.5	6000	3.98	7.96
G1.0	6000	1.59	3.18
G1.0	12000	0.80	1.59