CN107524648A - A kind of closed type energy-saving loop of excavator swing arm - Google Patents

A kind of closed type energy-saving loop of excavator swing arm Download PDF

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Publication number
CN107524648A
CN107524648A CN201710673978.8A CN201710673978A CN107524648A CN 107524648 A CN107524648 A CN 107524648A CN 201710673978 A CN201710673978 A CN 201710673978A CN 107524648 A CN107524648 A CN 107524648A
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CN
China
Prior art keywords
cylinder
valve
cylinders
energy
hydraulic fluid
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Pending
Application number
CN201710673978.8A
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Chinese (zh)
Inventor
仉志强
宋建丽
李永堂
刘志奇
贾跃虎
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Taiyuan University of Science and Technology
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Taiyuan University of Science and Technology
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Priority to CN201710673978.8A priority Critical patent/CN107524648A/en
Publication of CN107524648A publication Critical patent/CN107524648A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2264Arrangements or adaptations of elements for hydraulic drives
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2278Hydraulic circuits
    • E02F9/2289Closed circuit
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2278Hydraulic circuits
    • E02F9/2292Systems with two or more pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1414Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14Energy-recuperation means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/20576Systems with pumps with multiple pumps

Abstract

A kind of closed type energy-saving loop of excavator swing arm, belong to hydraulic transmission technology field, including prime mover, main pump, slippage pump, safety valve, shuttle valve, first, second working cylinder, auxiliary cylinders, energy-conservation cylinder, first, second reversal valve, accumulator, overflow valve, three-way diverter valve, fuel tank, controller, it is characterized in that the cylinder barrel and the cylinder barrel of auxiliary cylinders of described energy-conservation cylinder are coaxial, save the cylinder rod of cylinder and the cylinder rod of auxiliary cylinders connects, the working chamber of energy-conservation cylinder connects with the A mouths of three-way diverter valve, and the P mouths and T mouths of three-way diverter valve connect with accumulator and fuel tank respectively.Advantage is the closed system that excavator uses hydraulic pressure auxiliary cylinders compensating flowrate, and for actuator in severe duty and brake hard operating mode, the loop prevents main pump in-line from overflow occurs well, and movable arm potential energy is recycled, technology maturation, and energy efficiency is high.

Description

A kind of closed type energy-saving loop of excavator swing arm
Technical field
The invention belongs to hydraulic transmission technology field, and in particular to a kind of closed type energy-saving loop of excavator swing arm.
Background technology
With the great development of China's construction machinery industry, the effectively energy consumption in the work of reduction hydraulic crawler excavator has important Meaning.Pump control cylinder hydraulic circuit belongs to volumetric speed control technology, compared to throttling speed control circuit and volume-flow control circuit, pump control The whole efficiency of cylinder hydraulic circuit is high.It is proposed to use auxiliary cylinders balancing work in the patent of invention of application number 201710568689.1 The technical scheme of cylinder asymmetry flow, cost is low, good energy-conserving effect, technology maturation, has in the field such as excavator and loading machine Good prospect.But the actuator of excavator or loading machine is in severe duty or brake hard operating mode, patent The rod end chamber of back work cylinder described in 201710568689.1 and the pressure of main pump in-line increased dramatically, in-line hair Raw overflow, swing arm decrease speed is uncontrollable, and movable arm potential energy loss is not recycled utilization.
The content of the invention
, can be efficiently against depositing in the prior art it is an object of the present invention to provide a kind of closed type energy-saving loop of excavator swing arm The problem of.
The object of the present invention is achieved like this, as shown in Fig. 2 it include prime mover 1, main pump 2, slippage pump 4, first, The overflow check valve 7 of second repairing check valve, 5,12, first, second low pressure relief valve 6,8, first, second, 11, safety valve 10, shuttle Valve 9, main pump into and out of the overflow valve 15 of 3,13, first, second working cylinder of hydraulic fluid port pressure sensor 14.1,14.2, first, second, 16th, first, second reversal valve 17,18, auxiliary cylinders 19, energy-conservation cylinder 20, overflow valve 21, check valve 22, three-way diverter valve 23, accumulation of energy Device 24, fuel tank, controller, it is characterized in that:Save the energy-conservation cylinder cylinder barrel 20.1 and the auxiliary cylinders cylinder barrel 19.1 of auxiliary cylinders 19 of cylinder 20 On the same axis, save the energy-conservation cylinder cylinder rod 20.2 of cylinder 20 and be connected as one with the auxiliary cylinders cylinder rod 19.2 of auxiliary cylinders 19 Body, it is configured to save joint cylinder, energy-conservation cylinder working chamber 20.3 connects with the A mouths of three-way diverter valve 23, the P mouths of three-way diverter valve 23 Connected respectively with accumulator 24 and fuel tank with T mouths.
Described three-way diverter valve 23 is two-bit triplet reversal valve or three position three-way change valve.
The oil inlet of described overflow valve 21 and the oil-out of check valve 22 connect with the A mouths of three-way diverter valve 23, overflow The oil-out of valve 21 and the oil inlet of check valve 22 connect with fuel tank.
Described overflow valve 21 is single stage of pressure overflow valve or electric proportional pressure control valve.
Described energy-conservation joint cylinder has H types energy-conservation joint cylinder and M types energy-conservation joint cylinder.
As shown in figure 3, saving joint cylinder for H types, its structure is a left side of the right-hand member with H right cylinders cylinder 25.5 for H left cylinders cylinder 25.3 End is connected, and the left end of H left cylinders cylinder 25.3 is connected with H left end caps 25.1, and right-hand member and the H right end caps 25.6 of H right cylinders cylinder 25.5 connect Connect, the H guide sleeves 25.4 for being formed with centre bore are fixedly mounted on the joint portion of H left cylinders cylinder 25.3 and H right cylinders cylinder 25.5, H piston heads 25.2 are arranged on the intracavitary of H left cylinders cylinder 25.3, and the H piston rods 25.7 being connected with H piston heads 25.2 are slided mounted in H guide sleeves 25.4 In centre bore, the first hydraulic fluid ports of H a, H are offered respectively on H left end caps 25.1, the right-hand member of H left cylinders cylinder 25.3, H right end caps 25.6 Second the 3rd hydraulic fluid port c of hydraulic fluid port b, H.
As shown in figure 4, saving joint cylinder for M types, its structure is a left side of the right-hand member with M right cylinders cylinder 26.5 for M left cylinders cylinder 26.3 End is connected, and the left end of M left cylinders cylinder 26.3 is connected with M left end caps 26.1, and right-hand member and the M right end caps 26.6 of M right cylinders cylinder 26.5 connect Connect, the M guide sleeves 26.4 for being formed with centre bore are fixedly mounted on the joint portion of M left cylinders cylinder 26.3 and M right cylinders cylinder 26.5, M left pistons First 26.2 are separately mounted to the intracavitary of M left cylinders cylinder 26.3 and M right cylinders cylinder 26.5 with M right pistons first 26.8, installed in M guide sleeves The left and right end of M piston rods 26.7 in 26.4 centre bore respectively first with M left pistons 26.2, M right pistons first 26.8 be connected, Offer M respectively on M left end caps 26.1, the right-hand member of M left cylinders cylinder 26.3, the left end of M right cylinders cylinder 26.5, M right end caps 26.6 One hydraulic fluid port a ', the second hydraulic fluid ports of M b ', the hydraulic fluid port c ' of M the 3rd, the hydraulic fluid port d ' of M the 4th.
Advantage of the present invention and good effect are:
The closed system of hydraulic pressure auxiliary cylinders compensating flowrate is used for excavator or loading machine, actuator is in severe duty or tight When suddenly subtracting damped condition, the pressure jump of main pump in-line causes overflow, and the loop can prevent overflow, and movable arm potential energy realizes recovery Utilize, circuit technology journey is ripe, and energy efficiency is high.
Brief description of the drawings
Fig. 1 is the schematic diagram of the closed type energy-saving circuit embodiments 1 of excavator swing arm.
Fig. 2 is the schematic diagram of the closed type energy-saving circuit embodiments 2 of excavator swing arm.
Fig. 3 is the structural representation of H types energy-conservation joint cylinder.
Fig. 4 is the structural representation of M types energy-conservation joint cylinder.
In figure:1- prime mover, 2- main pumps, 3- main pump oil-out pressure sensors, 4- slippage pumps, the repairings of 5- first are unidirectional Valve, the low pressure relief valves of 6- first, 7- the first overflow check valves, the low pressure relief valves of 8- second, 9- shuttle valves, 10- safety valves, 11- Two overflow check valves, 12- the second repairing check valves, 13- main pump inlet pressure sensors, the working cylinders of 14.1- first, 14.2- Second working cylinder, the overflow valves of 15- first, the overflow valves of 16- second, the reversal valves of 17- first, the reversal valves of 18- second, 19- auxiliary Cylinder, 19.1- auxiliary cylinders cylinder barrels, 19.2- auxiliary cylinders cylinder rods, 20- energy-conservation cylinders, 20.1- energy-conservation cylinder cylinder barrels, 20.2- energy-conservation cylinder oil Cylinder rod, 20.3- energy-conservation cylinder working chambers, 21- overflow valves, 22- check valves, 23- three-way diverter valves, 24- accumulators, 25.1-H left ends Lid, 25.2-H piston heads, 25.3-H left cylinder cylinders, 25.4-H guide sleeves, 25.5-H right cylinder cylinders, 25.6-H right end caps, 25.7-H live Stopper rod, 26.1-M left end caps, 26.2-M left piston heads, 26.3-M left cylinder cylinders, 26.4-M guide sleeves, 26.5-M right cylinder cylinders, 26.6- M right end caps, 26.7-M piston rods, 26.8-M right piston heads, the hydraulic fluid ports of a-H first, the hydraulic fluid ports of b-H second, the hydraulic fluid ports of c-H the 3rd, a '-M First hydraulic fluid port, the hydraulic fluid ports of b '-M second, the hydraulic fluid ports of c '-M the 3rd, the hydraulic fluid ports of d '-M the 4th, the electromagnet of 1Y- first, the electromagnet of 2Y- second, The electromagnet of 3Y- the 3rd, the electromagnet of 4Y- the 4th, the electromagnet of 5Y- the 5th, the electromagnet of 6Y- the 6th.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1
As shown in figure 1, the closed type energy-saving loop of the excavator swing arm in the present embodiment, includes prime mover 1, main pump 2, slippage pump 4th, the overflow check valve 7 of first, second repairing check valve, 5,12, first, second low pressure relief valve 6,8, first, second, 11, safety Valve 10, shuttle valve 9, main pump are into and out of the overflow of 3,13, first, second working cylinder of hydraulic fluid port pressure sensor 14.1,14.2, first, second The reversal valve 17 of valve 15,16, first, second, 18, auxiliary cylinders 19, energy-conservation cylinder 20, three-way diverter valve 23, accumulator 24, fuel tank, control Device processed;
The main shaft of prime mover 1, main pump 2 and slippage pump 3 is connected, the Pa mouths of main pump 2 and main pump oil-out pressure sensor 3, the The oil-out of one repairing check valve 5, the oil inlet of the first overflow check valve 7, the first hydraulic fluid port of shuttle valve 9 and the first control mouth, The P mouths connection of one reversal valve 17, the Pb mouths of main pump 2 and main pump inlet pressure sensor 13, the second repairing check valve 12 go out Hydraulic fluid port, the oil inlet of the second overflow check valve 11, the second hydraulic fluid port of shuttle valve 9 and the second control mouth, the T mouths of the second reversal valve 18 connect Logical, the oil inlet of the oil-out of slippage pump 4 and first, second repairing check valve 5,12, the oil inlet of the first low pressure relief valve 6 connect Logical, the oil-out of first, second overflow check valve 7,11 connects with the oil inlet of safety valve 10, the 3rd hydraulic fluid port of shuttle valve 9 and the The oil inlet connection of two low pressure relief valves 8, the oil inlet of slippage pump 4, the oil-out of safety valve 10, first, second low pressure spill The oil-out of valve 6,8 connects with fuel tank;
It is to have O-shaped and M type Median Functions three position four-way directional control valve respectively that first, second described reversal valve 17,18, which is, the One working cylinder 14.1 and auxiliary cylinders 19 are mounted with displacement transducer, first, second working cylinder 14.1,14.2 parallel communications and structure Size is identical, equal, the auxiliary cylinders in the ratio between the ratio between the cylinder diameter of the first working cylinder 14.1 and bar footpath and the cylinder diameter of auxiliary cylinders 19 and bar footpath The volume of 19 plunger shaft be more than first, second working cylinder 14.1,14.2 plunger shaft volume and, the piston rod of auxiliary cylinders 19 The volume of chamber be more than the rod end chamber of first, second working cylinder 14.1,14.2 volume and, the A mouths of the first reversal valve 17 and the First, the oil inlet connection of the plunger shaft of the second working cylinder 14.1,14.2, the second overflow valve 16, the B mouths of the first reversal valve 17 and the First, the rod end chamber of the second working cylinder 14.1,14.2, the first overflow valve 15 oil inlet connection, the T mouths of the first reversal valve 17 with The P mouths connection of second reversal valve 18, the A mouths of the second reversal valve 18 connect with the plunger shaft of auxiliary cylinders 19, the B of the second reversal valve 19 Mouth connects with the rod end chamber of auxiliary cylinders 19, and the oil-out of first, second overflow valve 15,16 connects with fuel tank;
The energy-conservation cylinder cylinder barrel 20.1 of described energy-conservation cylinder 20 on the same axis, saves with the auxiliary cylinders cylinder barrel 19.1 of auxiliary cylinders 19 The energy-conservation cylinder cylinder rod 20.2 and the auxiliary cylinders cylinder rod 19.2 of auxiliary cylinders 19 of cylinder 20 connect as one, and are configured to energy-conservation joint Cylinder, energy-conservation cylinder working chamber 20.3 connect with the A mouths of three-way diverter valve 23, the P mouths and T mouths of three-way diverter valve 23 respectively with accumulator 24 connect with fuel tank, and three-way diverter valve 23 is electromagnetism two-bit triplet reversal valve;
As shown in figure 3, the structure of described H types energy-conservation joint cylinder is left end of the right-hand member with H right cylinders cylinder 25.5 of H left cylinders cylinder 25.3 It is connected by bolt group, the left end of H left cylinders cylinder 25.3 is connected with H left end caps 25.1, right-hand member and the H right-hand members of H right cylinders cylinder 25.5 Lid 25.6 connects, and the H guide sleeves 25.4 for being formed with centre bore are fixedly mounted on the joint portion of H left cylinders cylinder 25.3 and H right cylinders cylinder 25.5, H piston heads 25.2 are arranged on the intracavitary of H left cylinders cylinder 25.3, and the H piston rods 25.7 being connected with H piston heads 25.2 are slided to be oriented to mounted in H In the centre bore of set 25.4, H first is offered respectively on H left end caps 25.1, the right-hand member of H left cylinders cylinder 25.3, H right end caps 25.6 The 3rd hydraulic fluid port c of hydraulic fluid port b, H of hydraulic fluid port a, H second;With the 3rd hydraulic fluid port c working chambers that connect point of hydraulic fluid port b, H of the first hydraulic fluid ports of H a, H second Not Wei the plunger shafts of auxiliary cylinders 19, the rod end chamber of auxiliary cylinders 19, save the working chamber of cylinder 20.
The pressure set points of safety valve 10 are 40MPa, and the blowing pressure of accumulator 24 is 40MPa;When actuator declines When, the first, the 4th electromagnet 1Y, 4Y is powered, and the hydraulic oil of the Pa mouths of main pump 2 enters first, second by the first reversal valve 17 The rod end chamber of working cylinder 14.1,14.2, the hydraulic oil of the plunger shaft of first, second working cylinder 14.1,14.2 is by first, the Two reversal valves 17,18 enter the plunger shaft of auxiliary cylinders 19, and the hydraulic oil of the rod end chamber of auxiliary cylinders 19 passes through the second reversal valve 18 The Pb mouths of main pump 2 are returned to, when actuator is in light duty, the pressure of the Pb mouths of main pump 2 is set less than the pressure of safety valve 10 Definite value, now the 5th electromagnet 5Y power-off, when actuator is in severe duty or emergency deceleration or braking, the Pb mouths of main pump 2 Pressure when being more than 38MPa, the 5th electromagnet 5Y is powered, and the pressure of the Pb mouths of main pump 2 then reduces, and avoids overflow, actuator Decrease speed is controlled, and the potential energy storage of actuator is in accumulator 24, when actuator rises, in accumulator 24 Hydraulic oil enters energy-conservation cylinder working chamber 20.3, promotes actuator to rise, and energy is reused.
Embodiment 2
As shown in Fig. 2 the closed type energy-saving loop of the excavator swing arm in the present embodiment, includes prime mover 1, main pump 2, slippage pump 4th, the overflow check valve 7 of first, second repairing check valve, 5,12, first, second low pressure relief valve 6,8, first, second, 11, safety Valve 10, shuttle valve 9, main pump are into and out of the overflow of 3,13, first, second working cylinder of hydraulic fluid port pressure sensor 14.1,14.2, first, second The reversal valve 17 of valve 15,16, first, second, 18, auxiliary cylinders 19, energy-conservation cylinder 20, overflow valve 21, check valve 22, three-way diverter valve 23rd, accumulator 24, fuel tank, controller;
The main shaft of prime mover 1, main pump 2 and slippage pump 3 is connected, the Pa mouths of main pump 2 and main pump oil-out pressure sensor 3, the The oil-out of one repairing check valve 5, the oil inlet of the first overflow check valve 7, the first hydraulic fluid port of shuttle valve 9 and the first control mouth, The P mouths connection of one reversal valve 17, the Pb mouths of main pump 2 and main pump inlet pressure sensor 13, the second repairing check valve 12 go out Hydraulic fluid port, the oil inlet of the second overflow check valve 11, the second hydraulic fluid port of shuttle valve 9 and the second control mouth, the T mouths of the second reversal valve 18 connect Logical, the oil inlet of the oil-out of slippage pump 4 and first, second repairing check valve 5,12, the oil inlet of the first low pressure relief valve 6 connect Logical, the oil-out of first, second overflow check valve 7,11 connects with the oil inlet of safety valve 10, the 3rd hydraulic fluid port of shuttle valve 9 and the The oil inlet connection of two low pressure relief valves 8, the oil inlet of slippage pump 4, the oil-out of safety valve 10, first, second low pressure spill The oil-out of valve 6,8 connects with fuel tank;
It is to have O-shaped and M type Median Functions three position four-way directional control valve respectively that first, second described reversal valve 17,18, which is, the One working cylinder 14.1 and auxiliary cylinders 19 are mounted with displacement transducer, first, second working cylinder 14.1,14.2 parallel communications and structure Size is identical, equal, the auxiliary cylinders in the ratio between the ratio between the cylinder diameter of the first working cylinder 14.1 and bar footpath and the cylinder diameter of auxiliary cylinders 19 and bar footpath The volume of 19 plunger shaft be more than first, second working cylinder 14.1,14.2 plunger shaft volume and, the piston rod of auxiliary cylinders 19 The volume of chamber be more than the rod end chamber of first, second working cylinder 14.1,14.2 volume and, the A mouths of the first reversal valve 17 and the First, the oil inlet connection of the plunger shaft of the second working cylinder 14.1,14.2, the second overflow valve 16, the B mouths of the first reversal valve 17 and the First, the rod end chamber of the second working cylinder 14.1,14.2, the first overflow valve 15 oil inlet connection, the T mouths of the first reversal valve 17 with The P mouths connection of second reversal valve 18, the A mouths of the second reversal valve 18 connect with the plunger shaft of auxiliary cylinders 19, the B of the second reversal valve 19 Mouth connects with the rod end chamber of auxiliary cylinders 19, and the oil-out of first, second overflow valve 15,16 connects with fuel tank, three-way diverter valve 23 be electromagnetism three position three-way change valve;
As shown in figure 4, the structure of described M types energy-conservation joint cylinder is left end of the right-hand member with M right cylinders cylinder 26.5 of M left cylinders cylinder 26.3 It is connected by bolt group, the left end of M left cylinders cylinder 26.3 is connected with M left end caps 26.1, right-hand member and the M right-hand members of M right cylinders cylinder 26.5 Lid 26.6 connects, and the M guide sleeves 26.4 for being formed with centre bore are fixedly mounted on the joint portion of M left cylinders cylinder 26.3 and M right cylinders cylinder 26.5, M left pistons first 26.2 are separately mounted to the intracavitary of M left cylinders cylinder 26.3 and M right cylinders cylinder 26.5 with M right pistons first 26.8, installed in M The left and right end of M piston rods 26.7 in the centre bore of guide sleeve 26.4 respectively first with M left pistons 26.2, first 26.8 phase of M right pistons Connection, is opened up respectively on M left end caps 26.1, the right-hand member of M left cylinders cylinder 26.3, the left end of M right cylinders cylinder 26.5, M right end caps 26.6 There are the first hydraulic fluid ports of M a ', the second hydraulic fluid ports of M b ', the hydraulic fluid port c ' of M the 3rd, the hydraulic fluid port d ' of M the 4th;With the first hydraulic fluid ports of M a ', the second hydraulic fluid ports of M b ', M The working chamber of 4th hydraulic fluid port d ' connections is respectively the plunger shaft of auxiliary cylinders 19, the rod end chamber of auxiliary cylinders 19, saves the work of cylinder 20 Make chamber.
Overflow valve 21 is electric proportional pressure control valve, and the pressure set points of safety valve 10 are 40MPa, the blowing pressure of accumulator 24 For 20MPa, when actuator declines, the first, the 4th electromagnet 1Y, 4Y is powered, and the hydraulic oil of the Pa mouths of main pump 2 passes through first Reversal valve 17 enters the rod end chamber of first, second working cylinder 14.1,14.2, the piston of first, second working cylinder 14.1,14.2 The hydraulic oil of chamber enters the plunger shaft of auxiliary cylinders 19, the liquid of the rod end chamber of auxiliary cylinders 19 by first, second reversal valve 17,18 Force feed returns to the Pb mouths of main pump 2, when actuator is in light duty, the pressure of the Pb mouths of main pump 2 by the second reversal valve 18 Less than the pressure set points of safety valve 10, the 6th electromagnet 6Y is powered, when actuator is in severe duty or emergency deceleration or system When dynamic, when the pressure of the Pb mouths of main pump 2 is equal to 36MPa, the 5th electromagnet 5Y is powered, and the pressure of the Pb mouths of main pump 2 reduces, and avoids Overflow, actuator decrease speed are controlled, and the potential energy storage of actuator is in accumulator 24, when accumulator 24 reaches storage Can the upper limit or high oil temperature or when can not meet system requirements, the five, the 6th electromagnet 5Y, 6Y power-off, pass through overflow valve 21 Overflow effect makes swing arm speed be well controlled.
When actuator rises, the 5th electromagnet 5Y is powered, and the hydraulic oil in accumulator 24 enters energy-conservation cylinder working chamber 20.3, promote actuator to rise, energy is reused.

Claims (6)

1. a kind of closed type energy-saving loop of excavator swing arm, it includes prime mover(1), main pump(2), slippage pump(4), first, Two repairing check valves(5、12), first, second low pressure relief valve(6、8), first, second overflow check valve(7、11), safety valve (10), shuttle valve(9), main pump is into and out of hydraulic fluid port pressure sensor(3、13), first, second working cylinder(14.1、14.2), first, Two overflow valves(15、16), first, second reversal valve(17、18), auxiliary cylinders(19), energy-conservation cylinder(20), overflow valve(21), it is unidirectional Valve(22), three-way diverter valve(23), accumulator(24), fuel tank, controller, it is characterized in that:Described energy-conservation cylinder(20)Energy-conservation Cylinder cylinder barrel(20.1)With auxiliary cylinders(19)Auxiliary cylinders cylinder barrel(19.1)On the same axis, cylinder is saved(20)Energy-conservation cylinder oil cylinder Bar(20.2)With auxiliary cylinders(19)Auxiliary cylinders cylinder rod(19.2)Connect as one, be configured to save joint cylinder, save cylinder work Make chamber(20.3)With three-way diverter valve(23)A mouths connection, three-way diverter valve(23)P mouths and T mouths respectively with accumulator(24) Connected with fuel tank.
2. the closed type energy-saving loop of excavator swing arm as claimed in claim 1, it is characterized in that three-way diverter valve(23)For two Three-way diverter valve or three position three-way change valve.
3. the closed type energy-saving loop of excavator swing arm as claimed in claim 1, it is characterized in that described overflow valve(21)Enter Hydraulic fluid port and check valve(22)Oil-out and three-way diverter valve(23)A mouths connection, overflow valve(21)Oil-out and check valve (22)Oil inlet connected with fuel tank.
4. the closed type energy-saving loop of excavator swing arm as claimed in claim 3, it is characterized in that overflow valve(21)For single stage of pressure Overflow valve or electric proportional pressure control valve.
5. the closed type energy-saving loop of excavator swing arm as claimed in claim 1, it is characterized in that the H types of described energy-conservation joint cylinder Structure is H left cylinder cylinders(25.3)Right-hand member and H right cylinder cylinders(25.5)Left end be connected, H left cylinder cylinders(25.3)Left end and H it is left End cap(25.1)Connection, H right cylinder cylinders(25.5)Right-hand member and H right end caps(25.6)Connection, it is formed with the H guide sleeves of centre bore (25.4)It is fixedly mounted on H left cylinder cylinders(25.3)With H right cylinder cylinders(25.5)Joint portion, H piston heads(25.2)Installed in H left cylinders Cylinder(25.3)Intracavitary, with H piston heads(25.2)The H piston rods being connected(25.7)Cunning is mounted in H guide sleeves(25.4)Center In hole, in H left end caps(25.1), H left cylinder cylinders(25.3)Right-hand member, H right end caps(25.6)It is upper to offer the hydraulic fluid ports of H first respectively (a), the hydraulic fluid ports of H second(b), the hydraulic fluid ports of H the 3rd(c).
6. the closed type energy-saving loop of excavator swing arm as claimed in claim 1, it is characterized in that the M types of described energy-conservation joint cylinder Structure is M left cylinder cylinders(26.3)Right-hand member and M right cylinder cylinders(26.5)Left end be connected, M left cylinder cylinders(26.3)Left end and M it is left End cap(26.1)Connection, M right cylinder cylinders(26.5)Right-hand member and M right end caps(26.6)Connection, it is formed with the M guide sleeves of centre bore (26.4)It is fixedly mounted on M left cylinder cylinders(26.3)With M right cylinder cylinders(26.5)Joint portion, M left piston heads(26.2)With M right pistons Head(26.8)It is separately mounted to M left cylinder cylinders(26.3)With M right cylinder cylinders(26.5)Intracavitary, installed in M guide sleeves(26.4)In M piston rods in heart hole(26.7)Left and right end respectively with M left piston heads(26.2), M right piston heads(26.8)It is connected, in M Left end cap(26.1), M left cylinder cylinders(26.3)Right-hand member, M right cylinder cylinders(26.5)Left end, M right end caps(26.6)It is upper to open up respectively There are the hydraulic fluid ports of M first(a’), the hydraulic fluid ports of M second(b’), the hydraulic fluid ports of M the 3rd(c’), the hydraulic fluid ports of M the 4th(d’).
CN201710673978.8A 2017-08-09 2017-08-09 A kind of closed type energy-saving loop of excavator swing arm Pending CN107524648A (en)

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Application publication date: 20171229