CN1958972A

CN1958972A - Method for retrieving reciprocating potential energy of working machines and tools

Info

Publication number: CN1958972A
Application number: CNA2005100309251A
Authority: CN
Inventors: 李恒辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-01
Filing date: 2005-11-01
Publication date: 2007-05-09

Abstract

The present invention relates to a potential energy recovery system formed from an energy storage device, special cylinder and valve pipeline. Said system can high-effectively recover lots of potential energy produced when some working tool is downwards fallen and when said working tool is lifted, said system can release kinetic energy to apply work. Said system can be mainly used in the working tools which can be frequently moved upwards and downwards, such as excavating machine, crane and loading machine, etc.

Description

Method for retrieving reciprocating potential energy of working machines and tools

Technical field

The present invention relates to a kind of work implements and directly reclaim potential energy when moving down doing, work implements is at the power-economizing method that upwards discharges kinetic energy when moving, and the present invention uses wide in excavator, crane, loader ... Deng the workplace.

Technical background

The existing operating principle that is the example illustration method with concrete use occasion hydraulic excavator.In the present technology, hydraulic machineries such as excavator develop to energy-conservationization direction, hydraulic technique has been made significant headway aspect hydraulic pressure energy and the counter-rotatingization in that mechanical energy is changed into, but exists energy loss always, and main loss is in the volumetric loss and mechanical loss of system.If whole pressure can both be fully used, the service efficiency of the energy will be significantly improved.In the technology of the recovery this respect of energy, developed countries such as Japan, the U.S. do relatively goodly, when they utilize big arm to descend, other hydraulic cylinders or motor that the pressure oil that big arm oil cylinder comes out goes to promote working reach purpose of energy saving, but total recovery utilization rate is not high, if when big arm descends other working portion not work also just can not utilize and recover energy.

Summary of the invention

Content of the present invention provides that a kind of structure connects but the high potential energy recovery method of efficient reclaims when descending potential energy when the big arm of excavator is descended efficiently and stores, when promoting, the big arm of excavator releases energy, thereby offset the gravity that work implements self such as the big arm of excavator, forearm, bucket produce, hydraulic pressure can all be acted in the load, and can increase the strength and the speed that promote, thereby reach purpose of energy saving.

The present invention mainly is made up of accumulator, oil cylinder and valve and pipeline, shown in figure (1), native system is a relatively independent hydraulic system, except needing main system to provide control signal with main system when valve is opened is independently, oil cylinder in the system is installed in the CD place of Fig. 2, promptly between the upper brace of excavator and the big arm.The pressure oil that comes out in the oil cylinder when big arm descends during work is stored in the accumulator through pipeline, two position two-way valve, and pressure oil promoted the acting of rising of piston in the oil cylinder through pipeline and valve when big arm rose.

Description of drawings

Concrete operating principle of the present invention and concrete structure are provided by following examples and accompanying

drawing

1,2,3 thereof:

Fig. 1, be the hydraulic schematic diagram of native system

Fig. 2, the structural representation when being the native system installation

Fig. 3, be novel special-purpose double acting single-acting composite oil cylinder structure chart

Native system mainly comprises: accompanying drawing 1 (1) accumulator, (2) hydraulic cylinder, (3) two position two-way valve, (4) stop valve, (5) overflow valve, (6) gas cylinder, (7) one way valve, (8) stop valve.

When big arm of digger descended in the course of work, two position two-way valve (3) was provided by main system when big arm descends Signal is opened, the hydraulic oil of oil cylinder (2) bottom under pressed of big arm, form pressure oil through pipeline and two position two-way valve (3) and Stop valve (4) is stored in the accumulation of energy device (1). When stopping, getting back on big arm the position of closing under the effect of two position two-way valve at spring Put, thereby auxiliary big arm cylinder A, B (accompanying drawing 2) make big arm keep motionless. When big arm descended, the signal of main system made two Position two-port valve (3) is opened hydraulic oil and is pushed away through stop valve (4) two position two-way valve (3) inflow oil cylinder (2) from accumulation of energy device (1) Moving piston, auxiliary big arm cylinder A, B are mentioned big arm acting. Stop valve in the system (4) is in order to repair and filling hydraulic pressure Use during oil. Overflow valve (5) is that big arm cylinder A, B oil sealing have in the situation of leakage for when big arm stops to move, On the whole oil cylinder that is pressed onto in the native system of weight of the operating mechanisms such as whole big arm and load and cause in the system (2) two two of oil cylinders Logical valve (3) and oil pipe are set with the operating pressure that surpasses permission. Gas cylinder (6) is for after entering the accumulation of energy device at hydraulic oil, Prevent that pressure from rising De Taigao, the decline of the pressure of unlikely whole system arranges too much when hydraulic oil enters oil cylinder, also is exactly to be The pressure fluctuating range of whole system is controlled within the certain limit, be controlled at thereby the lifting power that the control oil cylinder produces is stable Rational range. The effect of check valve (7) is to make hydraulic oil get back to the bottom of oil cylinder in the situation that oil cylinder oil seal leaks, Perhaps from air bleeding valve servicing fluids force feed the time, hydraulic oil is entered the native system. The main effect of stop valve (8) is in the discharge system Air and servicing fluids force feed, also can replace with vexed head. Native system is owing to be that closed hydraulic pressure system liquid force feed is wanted when filling The amount of strict control filling, very few system inefficiency is crossed and can be caused at most operating efficiency too high and damage or cause safe thing So.

Oil cylinder shown in the accompanying drawing 3 is to be compounded with a double acting singly to go out rod oil cylinder and a single rod one-way cylinder, double acting in fact Oil cylinder partly uses for mechanical original hydraulic systems such as excavators, and one-way cylinder partly uses for native system. Native system mainly comprises: (1) the moving quiet piston rod of piston rod (3) piston rod packing assembly (4) support ring (5) (6) of the vexed head of exhaust tank filler sleeve (2) Static seal (7) cylinder barrel (8) static seal (9) piston (10) piston seal assembly (11) piston rod packing assembly (12) is lived Under plug locking nut and the quiet split pin for set piston rod of alignment pin (13) static seal (14) (15) cylinder upper cavity oil oilhole (16) oil cylinder Chamber oilhole (17) native system oilhole (18) drive end bearing bracket.

Operation principle is as follows: when big arm of digger descended, cylinder upper cavity oil oilhole (15) advanced oily pushing piston (9) from main system Acting, the hydraulic oil under the oil cylinder in the chamber is got back to main system from oilhole (16), and piston rod this moment (2) is retracted downwards in the oil cylinder, in Empty piston rod (2) also is the oil cylinder of quiet piston rod (5) simultaneously, and the hydraulic oil in the cylinder is pressed, in the middle of quiet piston rod (5) Oilhole and oilhole (17) flow into native system. The hydraulic oil of main system flows into oil cylinder through oilhole (16) when big arm upwards lifts Lower chamber pushing piston (9) is acting upwards, and piston rod (2) outwards stretches out, and the hydraulic oil of cylinder upper cavity oil enters through oilhole (15) Main system, the hydraulic oil of native system outwards stretches out through piston rod (2) the pushing piston bar (2) that oil (17) flows into hollow simultaneously. The vexed head of exhaust tank filler sleeve (1) is in order to use for the air in native system servicing fluids force feed and the discharge system. The piston rod packing assembly (3) be to rush down outward and establish for the hydraulic oil that prevents main system. Support ring (4) is in order to prevent piston rod (2) and quiet piston rod (5) directly rub and establish. The effect of static seal (6) be for prevent in the main system hydraulic oil from drive end bearing bracket (18) and The junction seepage of cylinder barrel (7). Static seal (8) is in order to prevent that hydraulic oil between the oil cylinder upper and lower cavity is from piston (9) and moving Flow between the piston rod (2). The effect of piston seal assembly (10) had not only sealed upper and lower cavity but also in order to prevent piston (9) and cylinder The friction of tube (7). The effect of piston rod packing assembly (11) is that isolation main system and native system also prevent piston rod (2) simultaneously And the friction between the quiet piston rod (5). Piston locking nut and alignment pin (12) are in order to prevent piston (9) relay piston Bar comes off on (2). Static seal (13) is in order to isolate main system and native system. The effect of quiet split pin for set piston rod (14) is In order to prevent that quiet piston rod (5) from coming off from the bottom of cylinder barrel (7). If native system has selected oil cylinder shown in the accompanying drawing 3 so attached Check valve among Fig. 1 and stop valve (8) can.

Structural representation when accompanying drawing 2 is the native system installation, A, B are the positions that the prototype oil cylinder is installed, CD is the position that installs oil cylinder additional.Also can directly repack the double acting single-acting composite oil cylinder shown in the accompanying drawing 3 at A, B two places, frame for movement more simply need not change the structure of upper brace and big arm like this.Can choose by actual needs when selecting for use.

The specific embodiment

Parameters such as the operating pressure of native system, flow, oil cylinder cylinder diameter accumulator volume size, gas cylinder amount of capacity, the blowing pressure and hydraulic-oil filling amount are owing to concrete use occasion difference can be decided by concrete condition.Must pressure select high part dimension that can reduction system, accumulator, gas cylinder capacity select to such an extent that can reduce the fluctuating range of pressure greatly.The element of native system need be installed in certain location except oil cylinder, and other elements can be installed by the space free of frame for movement, as accumulator, gas cylinder being installed among the counterweight of excavator.

Claims

1, the potential energy recovery system of mechanically installing that moves up and down at work implements, there are one or more specific hydraulic cylinders (accompanying drawing 1 sequence number 2) in this system or have the composite hydraulic cylinder (shown in the accompanying drawing 3) that works simultaneously, and Hydraulic Elements such as the auxiliary valve of the accumulator of a storage power (accompanying drawing 1 sequence number 1) and some, gas cylinder, pipeline are formed.Potential energy when the absorption work implements is downward discharges kinetic energy when work implements makes progress.

2, system according to claim 1 is characterized in that accumulator (accompanying drawing 1 sequence number 1) is connected by auxiliary with hydraulic cylinder (accompanying drawing 1 sequence number 2), absorbs potential energy when work implements is downward, discharges kinetic energy when work implements makes progress.

3, the feature according to the composite hydraulic cylinder shown in the claim 1 described (accompanying drawing 3) is a two-way cylinder and an one-way cylinder to be merged to make be in the same place, and double acting uses partly for former main system, and the single-acting part is used to native system.