CN204225173U - Anti-settling hydraulic system and engineering machinery - Google Patents

Anti-settling hydraulic system and engineering machinery Download PDF

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Publication number
CN204225173U
CN204225173U CN201420522259.8U CN201420522259U CN204225173U CN 204225173 U CN204225173 U CN 204225173U CN 201420522259 U CN201420522259 U CN 201420522259U CN 204225173 U CN204225173 U CN 204225173U
Authority
CN
China
Prior art keywords
hydraulic
settling
lifting cylinder
load lifting
valve
Prior art date
Application number
CN201420522259.8U
Other languages
Chinese (zh)
Inventor
李绪省
杨春永
郭金海
薛长久
Original Assignee
卡特彼勒(青州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 卡特彼勒(青州)有限公司 filed Critical 卡特彼勒(青州)有限公司
Priority to CN201420522259.8U priority Critical patent/CN204225173U/en
Application granted granted Critical
Publication of CN204225173U publication Critical patent/CN204225173U/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36Component parts
    • E02F3/42Drives for dippers, buckets, dipper-arms or bucket-arms
    • 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

Abstract

The utility model relates to a kind of anti-settling hydraulic system and a kind of engineering machinery comprising this anti-settling hydraulic system.Anti-settling hydraulic system comprises hydraulic oil container, at least one hydraulic pump, multiple directional control valve and at least one load lifting cylinder, wherein, hydraulic pump is used for entrance hydraulic oil being transported to load lifting cylinder from hydraulic oil container via multiple directional control valve, and the oil return opening of load lifting cylinder is communicated with main return line fluid via the oil return opening of multiple directional control valve, wherein, between the oil return opening and hydraulic oil container of load lifting cylinder, fluid is connected with a normally closed bypass valve, wherein, when bypass valve is opened, hydraulic oil in load lifting cylinder is got back in hydraulic jack by the bypass be communicated with bypass valve fluid by load lifting cylinder.By can or fall scraper bowl safely and reliably by anti-settling hydraulic system of the present utility model and engineering machinery after hydraulic system breaks down locking after machine stops working and reduce the leakage of hydraulic oil to a great extent and thus reduce the sedimentation of scraper bowl.

Description

Anti-settling hydraulic system and engineering machinery
Technical field
The utility model relates to a kind of anti-settling hydraulic system, and this anti-settling hydraulic system is particularly useful for the scraper bowl of such as loader.In addition, the utility model also relates to a kind of machine comprising this anti-settling hydraulic system, this machine especially loader.
Background technology
Described machine is such as known as loader, it is a kind of engineering machinery being widely used in the construction projects such as road, building, harbour, mine, it is mainly used in the bulk materials such as shovel dress soil, sandstone, lime, coal, also can make slight shovel to ore, pan soil etc. and dig operation.Spading and the operation of handling material of loader are realized by the motion of its equipment.Working device of loader comprises scraper bowl, swing arm, connecting rod, rocking arm and load lifting cylinder, overturning oil cylinder etc.Whole equipment is hinged on vehicle frame.Scraper bowl by connecting rod and rocking arm and overturning oil cylinder hinged, in order to load and unload material.Swing arm and vehicle frame, hoist cylinder are hinged, in order to be elevated scraper bowl.The upset of scraper bowl and the lifting of swing arm adopt hydraulic operation.
Also the hydraulic system of the scraper bowl driving control loader is become known in the prior art.Such as, a kind of hydraulic system of the elevating mechanism for scraper bowl is disclosed in patent document CN102951557A, this hydraulic system comprises fuel tank, hydraulic pump, lift valve and hydraulic cylinder, described lift valve has lifting position and decline position, in described lifting position, described lift valve makes the fluid in described fuel tank flow in the working chamber of described hydraulic cylinder by described hydraulic pump, in described decline position, described lift valve makes the fluid in described hydraulic cylinder flow back in described fuel tank, wherein, also safety valve is connected with between the working chamber of lift valve and described hydraulic cylinder.
In addition, a kind of loader pilot control hydraulic lock locking system is disclosed in patent document CN203080567U, this loader pilot control hydraulic lock locking system comprises fuel tank, hydraulic pump, pioneer pump, overflow valve, wherein, this system also comprises locking system, can anti-stopper arms, the scraper bowl phenomenon that drops occur.
But how above-mentioned prior art falls scraper bowl safely and reliably after hydraulic system breaks down locking or after machine is flame-out if not relating to.For this situation, the measure adopted in practice at present makes the oil in load lifting cylinder get back to fuel tank through selector valve and pilot-actuated valve etc.But, in such oil return path, there are too much parts, tie point is too much, thus the leakage situation of hydraulic oil is serious and cause the scraper bowl that loads may sedimentation uncontrollably, cause potential danger.
The utility model is intended to solve the above-mentioned one or more problem existed in prior art.
Utility model content
On the one hand, the utility model provides a kind of anti-settling hydraulic system, it comprises hydraulic oil container, at least one hydraulic pump, multiple directional control valve and at least one load lifting cylinder, wherein, hydraulic pump is used for entrance hydraulic oil being transported to load lifting cylinder from hydraulic oil container via multiple directional control valve, and the oil return opening of load lifting cylinder is communicated with main return line fluid via the oil return opening of multiple directional control valve, wherein, between the oil return opening and hydraulic oil container of load lifting cylinder, fluid is connected with a normally closed bypass valve, wherein, when bypass valve is opened, hydraulic oil in load lifting cylinder is got back in hydraulic jack by the bypass be communicated with bypass valve fluid by load lifting cylinder.
On the other hand, the utility model additionally provides a kind of machine, and it comprises by anti-settling hydraulic system described in the utility model.This machine especially loader.
Accompanying drawing explanation
Explanation the utility model is explained in detail in conjunction with embodiment of the present utility model referring to accompanying drawing.Embodiment shown in figure is only a kind of possible embodiment of the present utility model, and the feature comprised in manual, claim and accompanying drawing mutually can also combine in a different manner and obtain other different scheme.
Fig. 1 shows the hydraulic connecting figure of an embodiment by anti-settling hydraulic system of the present utility model.
Detailed description of the invention
Fig. 1 shows the hydraulic connecting figure of an embodiment by anti-settling hydraulic system of the present utility model.Illustrated hydraulic connecting figure comprises the hydraulic circuit of load lifting cylinder and the hydraulic circuit of upset cylinder, but eliminate pilot-actuated valve and corresponding control loop for clarity, abridged part is no longer discussed in detail at this, can with reference to prior art about this part.Scraper bowl anti-settling hydraulic system of the present utility model goes for various machine, such as loader, excavator or any other and any Machine Type performing that particular industry is such as dug up mine, built, certain operation of agricultural or transport etc. is relevant.
As shown in Figure 1, this anti-settling hydraulic system 10 mainly comprises hydraulic oil container 14, hydraulic pump, multiple directional control valve 11, load lifting cylinder 12 and bypass valve 13.The entrance of hydraulic pump is connected with hydraulic oil container 14, can also connect a strainer by fluid if desired between hydraulic pump and hydraulic oil container.Hydraulic pressure delivery side of pump is connected with the inlet fluid of multiple directional control valve 11, and the oil return opening of multiple directional control valve 11 is communicated with hydraulic oil container 14.At this, multiple directional control valve is the reversal valve of 3 position-5 way, but also can consider the multiple directional control valve of other suitable type.In addition, the work oil-out of multiple directional control valve 11 is communicated with the inlet fluid of load lifting cylinder 12, and the oil-out of load lifting cylinder is communicated with the oil return opening fluid of multiple directional control valve 11.Although figure 1 illustrates two load lifting cylinders, also can consider to arrange one or load lifting cylinder more than two.The inlet fluid of a normally closed bypass valve 13 is connected on the oil-out of load lifting cylinder 12, and the outlet of bypass valve 13 is communicated with the main return line leading to fuel tank 14.This bypass valve 13 such as can be designed to ball valve, and when this bypass valve is opened, the hydraulic oil in load lifting cylinder 12 directly can get back to hydraulic oil container 14 through this bypass valve.
At this, main return line refers to that the oil return opening from multiple directional control valve 11 or 15 leads to the return line of hydraulic oil container 14.
It is to be noted at this, the entrance of load lifting cylinder 12 refers to that the hydraulic oil from multiple directional control valve 11 enters into that opening of load lifting cylinder 12 working chamber via it; The oil-out of load lifting cylinder 12 refers to that the hydraulic oil in the working chamber of load lifting cylinder flows out that opening of working chamber via it.Obviously, along with the switching of multiple directional control valve, the entrance of load lifting cylinder 12 and the oil-out of load lifting cylinder 12 can convert.
Alternatively, the outlet of this bypass valve 13 also can directly be communicated with hydraulic oil container 14.Further reduce tie point thus and therefore avoid potential leakage point.
Alternatively, between load lifting cylinder 12 and bypass valve 13 or between bypass valve 13 and hydraulic oil container 14, a choke valve can be connected with by fluid, regulate oil return speed adaptably for the condition of loading with scraper bowl, to make scraper bowl safely and smoothly decline.
Similarly, hydraulic pressure delivery side of pump is connected with the inlet fluid of multiple directional control valve 15, and the oil return opening of multiple directional control valve 15 is communicated with the main return line leading to fuel tank 14.The work oil-out of multiple directional control valve 15 is communicated with the inlet fluid of upset cylinder 16, and the oil-out overturning cylinder 16 is communicated with the main return line leading to fuel tank 14 via the oil return opening of multiple directional control valve 14 equally.
Although shown in Figure 1 is that load lifting cylinder loop and upset cylinder loop can share a hydraulic pump, may be thought of as load lifting cylinder and overturn cylinder to arrange a hydraulic pump respectively.
In addition, in above-mentioned load lifting cylinder hydraulic circuit and upset cylinder hydraulic circuit, can also hydraulic control one-way valve 17 and overflow valve be set as in the prior art, repeat them here.
Industrial applicibility
The anti-settling hydraulic system of scraper bowl of the present utility model goes for various machine, such as, for preventing the hydraulic system of loading shovel sedimentation.
Below sketch the operating principle of the anti-settling hydraulic system shown in Fig. 1.First, when normally running, first hydraulic oil is pumped into multiple directional control valve 11 from hydraulic oil container 14 by hydraulic pump, the entrance of 15, and under the control of unshowned pilot-actuated valve, multiple directional control valve is connected or is switched to corresponding path.Then, hydraulic oil is transported to the entrance one of working chamber of load lifting cylinder or upset cylinder from the work oil-out of multiple directional control valve, and cause the piston in load lifting cylinder or upset cylinder to move thus, therefore scraper bowl can perform elevating movement or flip-flop movement.When hydraulic system breaks down or machine stops working, for preventing scraper bowl from dropping, hydraulic system by locking, therefore scraper bowl by hover over break down before or flame-out before position on.This position is likely lift location and scraper bowl probably loads, and therefore needs to fall scraper bowl safely and reliably.Therefore, such as manually or by means of external auxiliary device can open bypass valve 13, therefore the oil-out of load lifting cylinder 12 is communicated with this bypass valve fluid and forms the bypass of directly leading to hydraulic oil container, and load lifting cylinder 12, the such as hydraulic oil do not comprised in the working chamber of piston rod can get back to main return line via bypass valve 13 or directly get back to hydraulic oil container, therefore piston declines and thus achieves the controlled decline of scraper bowl.
In sum, by can or fall scraper bowl safely and reliably by anti-settling hydraulic system described in the utility model and machine after hydraulic system breaks down locking after machine stops working and reduce the leakage of hydraulic oil to a great extent and thus reduce the sedimentation of scraper bowl.
The experiment that applicant carries out shows, adopts anti-settling hydraulic system of the present utility model can greatly reduce the leakage of hydraulic oil and the sedimentation of scraper bowl.Compare with traditional oil return scheme of pilot-actuated valve with via selector valve, in employing by after anti-settling hydraulic system 10 described in the utility model, in same time, the sedimentation of scraper bowl can be lowered more than 50%.
By specific embodiment, anti-settling hydraulic system of the present utility model is described above.It is obvious to the skilled person that when do not depart from the scope of the present invention or spirit, various modifications and variations can be made to embodiment disclosed above.This manual and disclosed example thereof should be considered to just exemplary, and true scope of the present invention is by claims and equivalents thereof.
List of numerals
10 anti-settling hydraulic systems
11 multiple directional control valves
12 load lifting cylinders
13 bypass valve
14 hydraulic oil containers
15 multiple directional control valves
16 upset cylinders
17 hydraulic control one-way valves

Claims (10)

1. an anti-settling hydraulic system (10), it comprises hydraulic oil container (14), at least one hydraulic pump, multiple directional control valve (11) and at least one load lifting cylinder (12), wherein, described hydraulic pump is used for entrance hydraulic oil being transported to described load lifting cylinder (12) from described hydraulic oil container (14) via multiple directional control valve, and the oil return opening of described load lifting cylinder (12) is communicated with main return line fluid via the oil return opening of described multiple directional control valve (11), it is characterized in that, between the oil return opening and described hydraulic oil container (14) of described load lifting cylinder (12), fluid is connected with a normally closed bypass valve (13), wherein, when described bypass valve is opened, hydraulic oil in described load lifting cylinder (12) is got back in described hydraulic jack (14) by the bypass be communicated with described bypass valve (13) fluid by described load lifting cylinder (12).
2. anti-settling hydraulic system (10) according to claim 1, is characterized in that, the outlet of described bypass valve (13) is directly communicated with described hydraulic oil container (14).
3. anti-settling hydraulic system (10) according to claim 1, is characterized in that, the outlet of described bypass valve (13) is communicated with described main return line.
4. according to the anti-settling hydraulic system (10) one of claims 1 to 3 Suo Shu, it is characterized in that, described bypass valve (13) is designed to ball valve.
5. according to the anti-settling hydraulic system (10) one of claims 1 to 3 Suo Shu, it is characterized in that, described multiple directional control valve (11,15) is designed to the reversal valve of 3 position-5 way.
6. according to the anti-settling hydraulic system (10) one of claims 1 to 3 Suo Shu, it is characterized in that, described anti-settling hydraulic system (10) also comprises upset cylinder (16).
7. anti-settling hydraulic system (10) according to claim 6, is characterized in that, described anti-settling hydraulic system (10) comprises another hydraulic pump for described upset cylinder (16).
8. according to the anti-settling hydraulic system (10) one of claims 1 to 3 Suo Shu, it is characterized in that, between described load lifting cylinder (12) and described bypass valve (13) or between described bypass valve (13) and described hydraulic oil container (14), fluid is connected with a choke valve.
9. an engineering machinery, it comprises according to the anti-settling hydraulic system (10) one of claim 1 to 8 Suo Shu.
10. engineering machinery according to claim 9, is characterized in that, this project machinery is loader, and it comprises scraper bowl, and wherein, this scraper bowl drives control by described anti-settling hydraulic system (10).
CN201420522259.8U 2014-09-12 2014-09-12 Anti-settling hydraulic system and engineering machinery CN204225173U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420522259.8U CN204225173U (en) 2014-09-12 2014-09-12 Anti-settling hydraulic system and engineering machinery

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201420522259.8U CN204225173U (en) 2014-09-12 2014-09-12 Anti-settling hydraulic system and engineering machinery
RU2015138564A RU2015138564A3 (en) 2014-09-12 2015-09-10
BR102015022725A BR102015022725A2 (en) 2014-09-12 2015-09-11 anti-slip hydraulic machine and system

Publications (1)

Publication Number Publication Date
CN204225173U true CN204225173U (en) 2015-03-25

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Application Number Title Priority Date Filing Date
CN201420522259.8U CN204225173U (en) 2014-09-12 2014-09-12 Anti-settling hydraulic system and engineering machinery

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BR (1) BR102015022725A2 (en)
RU (1) RU2015138564A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525641A (en) * 2016-01-25 2016-04-27 徐州徐工特种工程机械有限公司 Movable arm dropping hydraulic system used for skid steer loader in case of flameout

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525641A (en) * 2016-01-25 2016-04-27 徐州徐工特种工程机械有限公司 Movable arm dropping hydraulic system used for skid steer loader in case of flameout

Also Published As

Publication number Publication date
RU2015138564A3 (en) 2019-03-19
RU2015138564A (en) 2017-03-20
BR102015022725A2 (en) 2016-03-15

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