Hydrostatic vs Aerostatic (Gas) Support: Which to Choose?

Key Takeaways:

Both use a pressurized film, but liquid and gas media differ sharply. Compare cleanliness, speed, load, stiffness, and the 'air-hammer' instability risk to choose correctly.

Hydrostatic vs Aerostatic (Gas) Support: Which to Choose?
Tags:
hydrostatic vs aerostatic gas bearing air bearing air hammer instability liquid hydrostatic advantages
Available Languages
🇷🇺 Русский

Гидростатическая vs аэростатическая (газовая) опора: что выбрать?

Две плёнки, одна идея

Обе опоры парят на плёнке под давлением. Среда меняет всё.

Жидкостная

Масло: высокая нагрузка и жёсткость, отличное гашение, терпит загрязнения. Для тяжёлой и виброчувствительной обработки.

Газовая

Воздух: чисто, мало нагрева, высокая скорость. Но ниже нагрузка/жёсткость и риск 'воздушного молотка'.

Выбор

Газ — для чистых высокоскоростных лёгких задач; гидростатика — для тяжёлых и жёстких.

🇻🇳 Tiếng Việt

Thủy tĩnh so với khí tĩnh (aerostatic): chọn thế nào?

Hai màng, một ý tưởng

Cả hai dùng màng áp suất. Môi chất thay đổi tất cả.

Chất lỏng

Dầu: tải và cứng cao, giảm chấn tốt, chịu bẩn. Cho gia công nặng nhạy rung.

Khí

Không khí: sạch, ít nóng, tốc cao. Nhưng tải/cứng thấp và có risk 'búa khí'.

Chọn

Khí cho sạch nhanh nhẹ; thủy tĩnh cho nặng cứng.

🇫🇷 Français

Hydrostatique vs aérostatique (gaz) : lequel choisir ?

Deux films, une idée

Les deux portent sur un film pressurisé. Le milieu change tout.

Liquide

Huile : forte charge et raideur, bon amortissement, tolère la saleté. Pour l'usinage lourd sensible aux vibrations.

Gaz

Air : très propre, peu de chaleur, grande vitesse. Mais charge/raideur plus faibles et risque de 'marteau pneumatique'.

Choix

Gaz pour propre, rapide, léger; hydrostatique pour lourd et rigide.

🇩🇪 Deutsch

Hydrostatik vs. Aerostatik (Gas): Was wählen?

Zwei Filme, eine Idee

Beide lagern auf einem Druckfilm. Das Medium ändert alles.

Flüssig

Öl: hohe Last und Steifigkeit, gute Dämpfung, verträgt Verschmutzung. Für schwere, vibrationskritische Arbeit.

Gas

Luft: sehr sauber, wenig Erwärmung, hohe Drehzahlen. Aber geringere Last/Steifigkeit und 'Luftpoltern'-Risiko.

Wahl

Gas für saubere, schnelle, leichte Aufgaben; Hydrostatik für schwere, steife.

Two Films, One Idea

Both hydrostatic (liquid) and aerostatic (gas) supports levitate a part on a pressurized film instead of mechanical contact. The medium changes everything.

Hydrostatic vs aerostatic

Liquid Hydrostatic

Uses hydraulic oil. Strong load capacity and stiffness, excellent damping, tolerant of moderate contamination. Best for heavy, precise, vibration-sensitive work.

Gas (Aerostatic)

Uses compressed air. Extremely clean (ideal for semiconductor/optical), minimal temperature rise, and capable of very high speeds. But load capacity and stiffness are lower, and it carries an 'air-hammer' (pneumatic resonance) instability risk under certain conditions.

Decision Guide

  • Choose aerostatic for ultra-clean, high-speed, light-load, low-heat applications (lithography, metrology).
  • Choose hydrostatic for high load, high stiffness, heavy cutting, and damping (grinding, turn-mill, rotary tables).

Bottom Line

When precision must survive heavy cutting forces, liquid hydrostatic support is the safer, stiffer choice.