Go up quickly move the oil cylinder design of machine of type oil pressure

255L/min. Can see from inside next watches: A factory uses force plunger jar, for means of self-prossessed return trip, the structure is simple, but opening speed is too slow, and accept the restriction with oil cylinder force plunger and self-prossessed workbench; Factory of B, C2 takes kind of oil pressure return trip, motion of B factory oil cylinder is normal, but opening speed still compares C factory slow, although opening speed of C factory oil cylinder is idealer, but the return trip often appears to be not stabilized however in using, sometimes even the piston cannot fall, have calorie of dead appearance, behavioral dependability is poor. How to undertake the structural design of the oil cylinder of 1 system and parameter choose pursueing, ability makes sure oil cylinder action is credible already, can reach ideal opening speed again, it is the problem that article place should study and solves. 360 Φ of Φ of D(mm) of structure of manufacturer oil cylinder and cylinder diameter of oil cylinder of factory of C of factory of B of factory of opening speed A 364 pistons of 340 Φ 360 Φ of Φ of lever diameter D(mm) 330 Φ 3 means of settlements discuss crock of force plunger of remarks of Mm/s2548111 of 360 actual opening speed 　 is shown 1 times to pursueing use hang gasoline tank high to offer when rising quickly, a factory uses oil cylinder of force plunger type, relying on the plan that force plunger and workbench return again oneself is unreasonable, although oil cylinder structure is simple, but opening speed accepts the restriction with force plunger and self-prossessed workbench, be hard to achieve ideal result. When the return trip, need to satisfy the requirement below: ／ of γ of D2L of π of ＋ of μ of W ＞ F0 4 (1) in type: W, the gravity of force plunger and workbench (N) ; F0, tighten force beforehand (N) ; μ , coefficient of friction, μ ＝ 0.

05 ～ 0.

1; D, crock aperture diameter (M) ; L, piston journey (M) ; γ , of oily fluid spend again (W of N/m3) 　 　 is bigger, opening speed is faster, but the restriction that the size of W accepts a structure to ask, cannot increase W casually; And when W increases, mean force plunger diameter to also increase, crock aperture diameter increases, criterion (1) type right also increases the 2nd times, so opening speed always suffers be restricted, the manage that is hard to press people rises presumably. So, the graph shows a system 1 times to should not be use force plunger jar. The oil cylinder structure that B factory and C factory use, to the graph 1 shows a system for, it is to be mixed scientificly undoubtedly reasonable, but how should its structure parameter choose, can ability make sure oil cylinder movement can reach ideal opening speed again reliably already? Analyse as follows now: Oil cylinder piston is in F of force of attrition of the sealing ring in motion: F ＝ (F0 of ＋ of Kp π DH) in μ type: K, lateral pressure coefficient, k ＝ 0.

6 ～ 0.

9; P, systematic pressure, MPa; H, the osculatory width of sealing ring and oil cylinder, mm; Before other symbol meaning is like, narrate. Theoretic, want to make move below the piston, f of ＞ of active force F moves below the piston, namely π (D2 - D2)p/4 ＞ (D2 of 　 of 　 of μ of Fo) of ＋ of Kp π DH - μ of 4f0 of ＋ of μ of D2 ＞ 4KDH / (π P) because 4f0 μ / (π P) and 4KDH μ photograph are compared small much, skip not plan, piston shank diameter is: (2) skip after tightening force beforehand, calculate to ensure the on the safe side of parameter, k and μ part of one's job do not take its upper limit to be worth, namely K ＝ 0.

9, μ ＝ 0.

1. Can see from inside type, when the oil cylinder that should design machine of this sort oil pressure, in load of foregone the biggest job the condition falls, make choice of systematic pressure, d of oil cylinder cylinder diameter can decide subsequently, check manual to be able to get corresponding H value, d also can decide. Current, provincial the pump of high-pressured force plunger that machine of each main manufacturer oil pressure uses Shanghai mostly or Shao Yang produces, use pressure is 20 ～ 27MPa, d of oil cylinder diameter is 360mm of Φ of Φ 300mm ～ , the 20mm of width H ＝ of adoption balata sealing ring, consider the friction that two sealing ring must overcome when the return trip. Accordingly, want to increase opening speed as far as possible below the premise that assures behavioral dependability, parameter of oil cylinder design must be satisfied (2) type requirement. If the B factory product that alludes before 4 designs example is designed by the method of the article, by type (2) calculates so that D should be: Take D ＝ 332mm. If C factory product is designed by the method of the article, by type (2) calculates so that D should be: Take D ＝ 356mm. Graph go up 200 tons when afore-mentioned principle designs produce 2 　 our basis quickly move the oil cylinder of machine of type oil pressure, cylinder diameter of 328mm of ＝ of D of make choice of (2) seeing a picture, by type (2) calculates: Take D ＝ 320mm. We still use 10MCY14-1B pump, opening speed is: V answers ＝ Q/ [π (D2 - D2) / 4] 253750/ of ＝ of 　 of 　 　 　 [3.

14 × (3282 - 3202) / 4] speed of ＝ 62mm/s 　 speed is: V enters ＝ Q ／ (253750 ／ of π D20/4) ＝ (3. 802 ／ of 14 × 4) the greatest actuating pressure is ＝ 50mm/s 　 : ／ of Pmax ＝ Gmax (2 × of ＝ of 　 of 　 of 　 of π D2/4) 　 10 6 / (3.

14 × 0.

3282 ／ 4) ＝ of 　 of 　 　 　 23681687.

8Pa ≈ 23.

Power of 68MPa 　 electromotor is: ／ of N ＝ PmaxQ (61. 2 η ) ＝ of 　 　 　 23.

68 × 15. 225 ／ (61. 2 × 0. 85) ＝ 6.

We use 93kW 　 likewise Y132M-4 7.

5kW electric machinery. In real work, the action is smooth, credible, better land solved the concern problem between dependability of oil cylinder structure and speed, movement, since putting in the market, get an user greatly reputably. CNC Milling CNC Machining