CN2074758U - One-way energy-saving electric power hydraulic propeller - Google Patents

Abstract

The utility model relates to a one-way energy-saving electric power hydraulic propeller for the brake of the motor-driven hydraulic push rod of a hoist and transportation machine. The utility model is characterized in that the oil path of a propeller piston is additionally provided with a unidirectional throttling film for reducing the oil return speed and drop speed of the piston. A hydraulic pressure push rod brake taking the utility model as the propeller has the technical performances of large braking moment, quick releasing brake, and smooth band brake and is especially suitable for the machine needing wind resistance and smooth braking such as the running and rotation mechanism of large and small-sized electric drive type vehicles of the hoist in portal-shaped hoisting machines for surface workings.

Description

One-way energy-saving electric power hydraulic propeller

The utility model is a kind of one-way throttle electro hydraulicthruster that is applied in the handling machinery electric drive hydraulic thruster drg, is the improvement to electro hydraulicthruster.

Pusher is the important motivity parts of electro hydraulicthruster.Not only produce the thrust that drg " declutches ", and can determine " declutching " and " band-type brake " speed.Fig. 1 is known electro hydraulicthruster constructional drawing.When the pump impeller motor (2) on pusher top is switched on, pump impeller (6) rotation at driven plunger (9) center.Because action of centrifugal force, the fluid in the oil cylinder epicoele pumps into the oil cylinder cavity of resorption through piston working connection (7).Promote piston stroking upward simultaneously, on the piston push rod (11) promote pendulum plate, the tappet of drg, push brake control lever open, realize declutching.When pump impeller motor (2) outage, pump impeller (6) stops wheel, and piston (9) begins to fall under drg main spring and deadweight effect immediately, and drg also begins " band-type brake " thereupon.Because oil return and oiling are to carry out under same oil circuit state, piston (9) falling speed is very fast, and band-type brake is too quickly.What therefore lock torque was recruited is big more, and the mechanical impulse force of generation is also big more.

The purpose of this utility model is prior art is done to improve, and designs a kind of electro hydraulicthruster with one-way throttle feature.

The purpose of the present utility model is to be achieved in the following manner.

In piston working connection (7), set up an one-way throttle film in order to the quantity of reflux of oil cylinder under slowing down and the falling speed of piston.

Describe formation of the present utility model and embodiment and application thereof in detail below in conjunction with accompanying drawing.

Fig. 1 is the electro hydraulicthruster constructional drawing;

Fig. 2 is the utility model structure partial diagrammatic sketch;

Fig. 3 is for using the brake structural figure of one-way throttle electro hydraulicthruster.

Among the figure: (1)--housing, (2)--the pump impeller motor, (3)--transmission shaft, (4)--impeller shaft, (5)--bearing, (6)--pump impeller, (7) (8)--piston working connection, (9)--piston, (10)--the one-way throttle film, (11)--push rod, (12)--axle sleeve, (13)--oil cylinder cover, (14)--oil cylinder, (15)--cutoff port, (17)--brake scotch, (18)--brake wheel, (19)--brake control lever, (20)--tappet, (21)--the pendulum plate, (22)--the one-way throttle electro hydraulicthruster.

Its formation of one-way throttle electro hydraulicthruster (22) includes housing (1), pump impeller motor (2), transmission shaft (3), impeller shaft (4), bearing (5), pump impeller (6), piston (9), push rod (11), axle sleeve (12), oil cylinder cover (13), oil cylinder (14), it is characterized in that forming also including one-way throttle film (10); One-way throttle film (10) the oil resistant elasticity oil sheet more smaller that be a diameter than piston (9) diameter, its center has the mounting hole that connects piston (9), and the hole has the cutoff port (15) in suitable aperture in the peripheral annulus.One-way throttle film (10) is crimped on piston (9) center, lower surface through center mounting hole.Piston (9) lower surface is smooth bright and clean, and is evenly equipped with oilhole.Cutoff port (15) gross area is less than piston working connection (7) sectional area.Piston (9) oil cylinder (14) respectively is epicoele and two chambers of cavity of resorption.When pump impeller motor (2) energized, drive pump impeller (6) rotation that is installed on the piston (9).Under centrifugal action, epicoele fluid is through pushing one-way throttle film (10) piston working connection (7) wholecircle week open fast to cavity of resorption.It is up to promote piston (9) simultaneously.After the motor outage, because under brake spring and piston (9) the deadweight effect, cavity of resorption hydraulic oil flows to epicoele, compressing one-way throttle film (10) fits in piston (9) lower surface, and hydraulic oil can only flow through cutoff port (15).Because cutoff port (15) aperture is less than piston (9) working connection aperture, the hydraulic oil return velocity is significantly little than oil injecting speed, thereby piston (9) falling speed is slowed down.The control falling speed can change throttle diameter and realize.The flow of cutoff port (15) is:

$Q=\mathrm{Cd}\sqrt{\frac{2g}{r}}\·A\·\mathrm{\Δ}{P}^{\frac{1}{2}}$

Flow coefficient C d in the formula, fluid severe r, pressure reduction P determine under the situation that the oilhole sectional area A that only changes can put in order the cutoff port flow.

Fig. 3 is the application of the utility model in handling machinery electric drive hydraulic thruster drg.

Pump impeller motor (2) is through the master cock energized, under pump impeller (6) effect, hydraulic oil flows into cavity of resorption fast from epicoele, piston (9) is up, push rod (11) moves with piston (9), promote fork (21) and brake control lever (19), take-off the brake watt (17) realizes that brake wheel (18) declutches.As pump impeller motor (2) outage, under brake spring and piston deadweight effect, piston (9) desire falls, and cavity of resorption hydraulic oil fits in piston (9) lower surface cutoff port (15) restriction oil return flow to one-way throttle film (10), and piston slowly falls.

Using hydraulic push-rod brake of the present utility model, to have a lock torque big, declutches rapidly.The technical performance that band-type brake is mild, band-type brake speed can be adjusted according to different needs, be applied to particularly that the large and small garage of electronic execution formula hoisting crane such as gauntry crane tool is walked and swing type mechanism in, existing very big wind prevention braking ability, can guarantee again in the service braking mild do not have impact.When recruiting the lock torque of drg enough greatly, do not setting up under any anti-wind brake situation, can guarantee under 8～9 grades of strong wind not smooth, and realize mild band-type brake, service braking is steadily reliable, do not have and impact, and using drg of the present utility model is collection service braking and the wind prevention braking desirable hydraulic brake as one.

Claims (1)

1, a kind of one-way throttle electro hydraulicthruster, constitute by housing (1), motor (2), transmission shaft (3), impeller shaft (4), bearing (5), pump impeller (6), piston (9), push rod (11), axle sleeve (12), oil cylinder cover (13), oil cylinder (14), it is characterized in that:

Its composition of A also includes one-way throttle film (10);

B one-way throttle film (10) be diameter than the smaller oil resistant elastic memberance of piston (9) diameter, the center has the mounting hole that connects piston (9), the hole has the cutoff port (15) in suitable aperture in the peripheral annulus;

C one-way throttle film (10) is crimped on piston (9) lower end surface center through center mounting hole;

Smooth bright and clean piston working connection (7) the oil transportation hole that is evenly equipped with, D piston (9) lower surface;

E cutoff port (15) gross area is less than piston working connection (7) gross area.

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