CN203834536U - Hydraulic excavator swing arm preference hydraulic oil path and system vibration-reduction hydraulic loop - Google Patents
Hydraulic excavator swing arm preference hydraulic oil path and system vibration-reduction hydraulic loop Download PDFInfo
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- CN203834536U CN203834536U CN201420103442.4U CN201420103442U CN203834536U CN 203834536 U CN203834536 U CN 203834536U CN 201420103442 U CN201420103442 U CN 201420103442U CN 203834536 U CN203834536 U CN 203834536U
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- valve
- swing arm
- dipper
- hydraulic
- operating valve
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Abstract
The utility model discloses a hydraulic excavator swing arm preference hydraulic oil path and system vibration-reduction hydraulic loop. The hydraulic excavator swing arm preference hydraulic oil path and system vibration-reduction hydraulic loop comprises a guide part and a work part. A bucket rod servo oil path, a swing arm servo oil path and a bucket servo oil path are arranged in the guide part, a limiting valve is arranged between the bucket servo oil path and the swing arm servo oil path, a one-way throttle valve B is arranged in the swing arm servo oil path, and a one-way throttle valve A are arranged in the bucket rod servo oil path. Swing arm preference and buffering functions are achieved respectively through the limiting valve and the one-way throttle valves A and B, and the problems that combined motions are uncoordinated and the vibration of the whole machine is large due to hydraulic impact in the process of starting, braking and sudden reversing are resolved.
Description
Technical field
The present invention relates to the design field on excavator hydraulic oil road, be specifically related to the preferential hydraulic circuit of a kind of Hydraulic Excavator's Boom and system damping fluid hydraulic circuit.
Background technology
Excavator, claims again excavation machinery (excavatingmachinery), is to excavate higher or lower than the material that holds machine side with scraper bowl, and packs haulage vehicle into or unload the earth moving plant to rickyard.The material that excavator excavates is mainly soil, coal, silt and the Soil and Rock after pre-pine.From the development of engineering machinery in recent years, the development of excavator is relatively very fast, and excavator has become topmost engineering machinery in a kind of engineering construction.The walking of excavator, revolution and excavation action drive by hydraulic circuit, in tradition excavator, because servo oil circuit and the main valve oil circuit assignment of traffic of hydraulic crawler excavator are unreasonable, therefore when doing compound excavation action (simultaneously operating swing arm, dipper, scraper bowl), scraper bowl first has the action of excavation, and after delay a period of time, swing arm just has enhancing action, reflects that excavator swing arm action postpones, cause composite move inharmonious, so cause that operating efficiency is low, exercise not harmony when level land and ramping; And repeatedly operate dipper, it is large that hydraulic shock causes complete machine oscillation, easily cause the damage of inner components.
Publication No. is that the patent document of CN202416430U discloses revolution buffering and the swing arm priority control system in a kind of excavator hydraulic control positive flow system, two-way outlet at revolution pilot valve arranges respectively first throttle element, two entrances of the revolution action shuttle valve in the output Access Control shuttle valve group of described first throttle element, and two entrances of described revolution action shuttle valve connect respectively guide's end of main valve revolution connection; Outlet one tunnel of revolution action shuttle valve connects the control end of main pump, and another road enters pilot operated directional control valve through second section fluid element; The commutation control end of described pilot operated directional control valve is connected with the output of swing arm pilot valve.This scheme makes swing arm have precedence over revolution to reach composite move and coordinate, put in place simultaneously; And can make revolution start and stop moving soft, cushioned.But this scheme arranges throttling original paper on revolution guide oil circuit, and latus rectum is non-adjustable, although can reach the preferential requirement of swing arm, but speed of gyration is slack-off, postpone higher, when loading, moved arm lifting for high-frequency composite move, obviously can reduce operating efficiency with revolution; In addition, this scheme for be swing arm and rotating preferential control, and be not suitable for swing arm compared to the preferential lifting of dipper.
Summary of the invention
The present invention aims to provide the preferential hydraulic circuit of a kind of Hydraulic Excavator's Boom and system damping fluid hydraulic circuit, inharmonious to solve in prior art digger operating device composite move, the problem that the hydraulic shock of dipper hydraulic cylinder is large.
The present invention is achieved by following technical solution:
The preferential hydraulic circuit of a kind of Hydraulic Excavator's Boom and system damping fluid hydraulic circuit, comprise guide's part and working portion, described working portion comprises the pump housing and the fuel tank being connected, pump housing downstream is connected with swing arm operating valve, scraper bowl operating valve and the dipper operating valve being in parallel, swing arm operating valve, dipper operating valve are also connected with swing arm converging valve, dipper converging valve respectively, and described swing arm operating valve, scraper bowl operating valve and dipper operating valve downstream have been connected respectively swing arm hydraulic cylinder, scraper bowl hydraulic cylinder and dipper hydraulic cylinder;
Described pilot portion is divided and is comprised the guide's servopump being arranged in the pump housing, guide's servopump downstream is connected with pilot solenoid valve, pilot solenoid valve downstream is connected with dipper guide operating valve, swing arm guide operating valve and the scraper bowl guide operating valve being in parallel, dipper guide operating valve, swing arm guide operating valve and scraper bowl guide operating valve downstream respectively with dipper operating valve, dipper converging valve, swing arm operating valve, swing arm converging valve, and scraper bowl operating valve is connected and forms respectively dipper servo oil circuit, swing arm servo oil circuit and scraper bowl servo oil circuit;
Between described scraper bowl servo oil circuit and swing arm servo oil circuit, be provided with a limit valve, in swing arm servo oil circuit, be provided with one-way throttle valve B, in dipper servo oil circuit, be provided with one-way throttle valve A.
Described one-way throttle valve B has two, and is separately positioned on swing arm operating valve upstream, right position and swing arm converging valve upstream.
Described one-way throttle valve A is arranged on upstream, the right position of dipper operating valve.
Described one-way throttle valve B latus rectum φ=0.8mm.
Described one-way throttle valve A latus rectum φ=1.0mm.
The invention has the beneficial effects as follows:
Compared with prior art, the preferential hydraulic circuit of Hydraulic Excavator's Boom provided by the invention and system damping fluid hydraulic circuit have the following advantages:
(1) between scraper bowl servo oil circuit and swing arm servo oil circuit, be provided with a limit valve; Under the effect of limit valve, make guide oil flow reasonable distribution again, because limiting piston sectional area is less than spool sectional area, the right position of limit valve pressure is greater than left position pressure, by pressure differential, regulate the valve core opening degree of scraper bowl control valve, play the effect of its velocity of displacement that slows down, thereby reduce scraper bowl cylinder pressure oil flow, increase swing arm cylinder pressure oil flow, and then realize the preferential object of swing arm.
(2) in swing arm servo oil circuit, be provided with one-way throttle valve B; When operating swing arm guide operating valve separately, by the restriction in this one-way throttle valve B and one way valve, play the slow oil-feed of swing arm hydraulic cylinder and oil return, realize buffering object, reach effectiveness in vibration suppression.In dipper servo oil circuit, be provided with one-way throttle valve A; Operation dipper guide operating valve is separately, by the restriction in one-way throttle valve A and one way valve, plays the slow oil-feed of dipper hydraulic cylinder and oil return, realizes buffering object, arrives effectiveness in vibration suppression.Efficiently solve hydraulic shock when starting, brake and commutate suddenly and cause the problem that complete machine oscillation is large.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention;
Fig. 2 is the structural layout plan of limit valve and scraper bowl control valve in the present invention;
In figure: the 1-pump housing, 2-swing arm control valve, 3-swing arm converging valve, 4-scraper bowl control valve, 5-limit valve, 6-dipper converging valve, 7-dipper control valve, 8-one-way throttle valve A, 9-pilot solenoid valve, 10-dipper guide operating valve, 11-swing arm guide operating valve, 12-scraper bowl guide operating valve, 13-hydraulic oil container, 14-dipper hydraulic cylinder, 15-scraper bowl hydraulic cylinder, 16-swing arm hydraulic cylinder, 17-one-way throttle valve B, 18-plug, 19-sealing ring, preferential servo mouthful of 20-swing arm, 21-spring cup, servo mouthful of 22-scraper bowl, 23-piston, 24-scraper bowl operation spool.
The specific embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further, but described in desired protection domain is not limited to;
As shown in Figure 1, the preferential hydraulic circuit of Hydraulic Excavator's Boom provided by the invention and system damping fluid hydraulic circuit, comprise guide's part and working portion, described working portion comprises the pump housing 1 and the fuel tank 13 being connected, the pump housing 1 downstream is connected with the swing arm operating valve 2 being in parallel, scraper bowl operating valve 4 and dipper operating valve 7, swing arm operating valve 2, dipper operating valve 7 also respectively with swing arm converging valve 3, dipper converging valve 6 connects, described swing arm operating valve 2, scraper bowl operating valve 4 and dipper operating valve 7 downstreams have been connected respectively swing arm hydraulic cylinder 16, scraper bowl hydraulic cylinder 15 and dipper hydraulic cylinder 14,
Described pilot portion is divided and is comprised the guide's servopump being arranged in the pump housing 1, guide's servopump downstream is connected with pilot solenoid valve 9, pilot solenoid valve 9 downstreams are connected with dipper guide operating valve 10, swing arm guide operating valve 11 and the scraper bowl guide operating valve 12 being in parallel, dipper guide operating valve 10, swing arm guide operating valve 11 and scraper bowl guide operating valve 12 downstreams respectively with dipper operating valve 7, dipper converging valve 6, swing arm operating valve 2, swing arm converging valve 3, and scraper bowl operating valve 4 is connected and forms respectively dipper servo oil circuit, swing arm servo oil circuit and scraper bowl servo oil circuit;
Between described scraper bowl servo oil circuit and swing arm servo oil circuit, be provided with a limit valve 5, in swing arm servo oil circuit, be provided with one-way throttle valve B17, in dipper servo oil circuit, be provided with one-way throttle valve A8.
Described one-way throttle valve B17 has two, and is separately positioned on 2 right upstreams of swing arm operating valve and swing arm converging valve 3 upstreams.
Described one-way throttle valve A8 is arranged on 7 right upstreams of dipper operating valve.
Described one-way throttle valve B17 latus rectum φ=0.8mm.
Described one-way throttle valve A8 latus rectum φ=1.0mm.
Embodiment 1:
Limit valve 5 as shown in Figure 2 and the structural layout plan of scraper bowl control valve 4, have swing arm preferential servo mouthful 21 and the servo mouth 22 of scraper bowl on spring cup 21, the preferential servo mouth 21 of swing arm is connected with the large chamber of swing arm (rodless cavity) servo control donsole.When the large chamber of swing arm servo control donsole and preferential servo mouthful 21 oil-feed simultaneously of swing arm, the limiting piston 23 that the servo pressure at preferential servo mouthful of 21 places of swing arm promotes in limit valve 5 moves down, scraper bowl operation spool 24 in scraper bowl control valve 4 moves up and contacts with limiting piston 23, the pressure relieving scraper bowl of limiting piston 23 tops is handled the velocity of displacement of spool 24, scraper bowl hydraulic cylinder 15 oil-feed flows are reduced, the oil-feed flow that is assigned to swing arm hydraulic cylinder 16 large chambeies increases, thereby realize swing arm, promotes preferential object.
Embodiment 2:
Excavator is done composite move, operation swing arm guide operating valve 11, scraper bowl guide operating valve 12, and swing arm is in lifting state, scraper bowl is in excavation state, guide's part: guide's servopump fuel feeding on the pump housing 1, servo pressure oil promotes scraper bowl control valve 4 in right position, and scraper bowl is in excavation state; Servo pressure oil promotes swing arm control valve 2, swing arm converging valve 3 in right position simultaneously, and swing arm is in lifting state; And servo pressure oil acts on (the left position of scraper bowl control valve 4) on scraper bowl control valve 4 spools after entering limit valve 5, because limiting piston sectional area is S1, spool sectional area is S2, S1<S2, therefore PS1<PS2, right position pressure P S2 is higher than left position pressure P S1.By pressure differential, regulate the valve core opening degree of scraper bowl control valve 4, play the effect of its velocity of displacement that slows down, thereby reduce scraper bowl hydraulic cylinder 15 pressure oil flows, increase swing arm hydraulic cylinder 16 pressure oil flows.By this kind of mode, realize flow and redistribute, thereby reach the preferential object of swing arm.
Embodiment 3:
Operate separately dipper guide operating valve 10, dipper is in lifting state, guide's servopump fuel feeding on the pump housing 1, servo pressure oil first passes through the restriction that in one-way throttle valve A8, latus rectum is φ=1.0mm, slowly promote the spool of dipper converging valve 6, dipper control valve 7, pressure is opened the one way valve in one-way throttle valve A8 after raising, and servo pressure oil flow is slowly increased to default value from small to large, and the spool of dipper converging valve 6, dipper control valve 7 is slow mobile in right position simultaneously.The slow oil-feed of dipper hydraulic cylinder 14 loculus, plays buffering effect, and shortens the delay voltage time.When shut-down operation dipper guide operating valve 10, dipper hydraulic cylinder 14 loculuses stop oil-feed moment, dipper converging valve 6, dipper control valve 7 are about in meta, one-way throttle valve A8 controls servo oily oil return speed, thereby regulate the spool displacement speed of dipper converging valve 6, dipper control valve 7, the rate of change of controlling principal pressure oil flow, plays buffering effect.Solve hydraulic shock when starting, brake and commutate suddenly and caused the large phenomenon of complete machine oscillation.
Embodiment 4:
Operate separately swing arm guide operating valve 11, swing arm is lifting state, guide's servopump fuel feeding on the pump housing 1, servo pressure oil first passes through the restriction that in one-way throttle valve B17, latus rectum is φ=0.8mm, the spool that slowly promotes swing arm control valve 2, swing arm converging valve 3 is then opened the one way valve in one-way throttle valve B17, servo pressure oil flow is slowly increased to default value from small to large, simultaneously the spool of swing arm control valve 2, swing arm converging valve 3 is slow mobile and in right position, the 16 slow oil-feeds in large chamber of swing arm hydraulic cylinder, play buffering effect.When shut-down operation swing arm guide operating valve 11, the large chamber of swing arm hydraulic cylinder 16 stops oil-feed moment, swing arm control valve 2, swing arm converging valve 3 are in meta, individual event choke valve B17 controls servo oil return speed, thereby regulate the spool displacement speed of swing arm swing arm control valve 2, swing arm converging valve 3, the rate of change of controlling principal pressure oil flow, plays buffering effect.Solve hydraulic shock when starting, brake and commutate suddenly and caused the large phenomenon of complete machine oscillation.
Claims (5)
1. the preferential hydraulic circuit of Hydraulic Excavator's Boom and system damping fluid hydraulic circuit, comprise guide's part and working portion, described working portion comprises the pump housing (1) and the fuel tank (13) being connected, the pump housing (1) downstream is connected with the swing arm operating valve (2) being in parallel, scraper bowl operating valve (4) and dipper operating valve (7), swing arm operating valve (2), dipper operating valve (7) also respectively with swing arm converging valve (3), dipper converging valve (6) connects, described swing arm operating valve (2), scraper bowl operating valve (4) and dipper operating valve (7) downstream have been connected respectively swing arm hydraulic cylinder (16), scraper bowl hydraulic cylinder (15) and dipper hydraulic cylinder (14),
Described pilot portion is divided and is comprised the guide's servopump being arranged in the pump housing (1), guide's servopump downstream is connected with pilot solenoid valve (9), pilot solenoid valve (9) downstream is connected with the dipper guide operating valve (10) being in parallel, swing arm guide operating valve (11) and scraper bowl guide operating valve (12), dipper guide operating valve (10), swing arm guide operating valve (11) and scraper bowl guide operating valve (12) downstream respectively with dipper operating valve (7), dipper converging valve (6), swing arm operating valve (2), swing arm converging valve (3), and scraper bowl operating valve (4) is connected and forms respectively dipper servo oil circuit, swing arm servo oil circuit and scraper bowl servo oil circuit,
It is characterized in that: between described scraper bowl servo oil circuit and swing arm servo oil circuit, be provided with a limit valve (5), in swing arm servo oil circuit, be provided with one-way throttle valve B(17), in dipper servo oil circuit, be provided with one-way throttle valve A(8).
2. the preferential hydraulic circuit of Hydraulic Excavator's Boom according to claim 1 and system damping fluid hydraulic circuit, it is characterized in that: described one-way throttle valve B(17) have two, and be separately positioned on swing arm operating valve (2) upstream, right position and swing arm converging valve (3) upstream.
3. the preferential hydraulic circuit of Hydraulic Excavator's Boom according to claim 1 and system damping fluid hydraulic circuit, is characterized in that: described one-way throttle valve A(8) be arranged on upstream, the right position of dipper operating valve (7).
4. the preferential hydraulic circuit of Hydraulic Excavator's Boom according to claim 1 and system damping fluid hydraulic circuit, is characterized in that: described one-way throttle valve B(17) latus rectum φ=0.8mm.
5. the preferential hydraulic circuit of Hydraulic Excavator's Boom according to claim 1 and system damping fluid hydraulic circuit, is characterized in that: described one-way throttle valve A(8) latus rectum φ=1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103442.4U CN203834536U (en) | 2014-03-07 | 2014-03-07 | Hydraulic excavator swing arm preference hydraulic oil path and system vibration-reduction hydraulic loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103442.4U CN203834536U (en) | 2014-03-07 | 2014-03-07 | Hydraulic excavator swing arm preference hydraulic oil path and system vibration-reduction hydraulic loop |
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| Publication Number | Publication Date |
|---|---|
| CN203834536U true CN203834536U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420103442.4U Expired - Fee Related CN203834536U (en) | 2014-03-07 | 2014-03-07 | Hydraulic excavator swing arm preference hydraulic oil path and system vibration-reduction hydraulic loop |
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| CN (1) | CN203834536U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234103A (en) * | 2014-03-07 | 2014-12-24 | 贵州詹阳动力重工有限公司 | Hydraulic excavator movable arm priority hydraulic oil way and system vibration damping hydraulic loop |
| CN108894273A (en) * | 2018-08-09 | 2018-11-27 | 尹建新 | Excavator one hand control device |
-
2014
- 2014-03-07 CN CN201420103442.4U patent/CN203834536U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234103A (en) * | 2014-03-07 | 2014-12-24 | 贵州詹阳动力重工有限公司 | Hydraulic excavator movable arm priority hydraulic oil way and system vibration damping hydraulic loop |
| CN104234103B (en) * | 2014-03-07 | 2017-02-01 | 贵州詹阳动力重工有限公司 | Hydraulic excavator movable arm priority hydraulic oil way and system vibration damping hydraulic loop |
| CN108894273A (en) * | 2018-08-09 | 2018-11-27 | 尹建新 | Excavator one hand control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 |