CN104828725A - Hydraulic control system and engineering machinery having hydraulic control system - Google Patents

Hydraulic control system and engineering machinery having hydraulic control system Download PDF

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Publication number
CN104828725A
CN104828725A CN201410432530.3A CN201410432530A CN104828725A CN 104828725 A CN104828725 A CN 104828725A CN 201410432530 A CN201410432530 A CN 201410432530A CN 104828725 A CN104828725 A CN 104828725A
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China
Prior art keywords
oil
valve
change
oil inlet
communicated
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Granted
Application number
CN201410432530.3A
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Chinese (zh)
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CN104828725B (en
Inventor
洪建求
李萌
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Hebei Leisa Heavy Construction Machinery Co., Ltd
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Beiqi Foton Motor Co Ltd
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Priority to CN201410432530.3A priority Critical patent/CN104828725B/en
Publication of CN104828725A publication Critical patent/CN104828725A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02Driving gear
    • B66D1/08Driving gear incorporating fluid motors
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02Improving by compacting
    • E02D3/046Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • 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
    • F15B11/02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed

Abstract

The invention provides a hydraulic control system and engineering machinery having the hydraulic control system. The hydraulic control system comprises a first main oil pump, a windlass motor and balance valve set, a first multi-way valve and an oil supplementing pump, wherein the windlass motor and balance valve set comprises a first oil port and a second oil port; the first multi-way valve comprises an oil inlet, a first working oil port and a second working oil port; an oil outlet of the first main oil pump is communicated with the oil inlet of the first multi-way valve; the first working oil port of the first multi-way valve is communicated with the first oil port; the second working oil port of the first multi-way valve is communicated with the second oil port; and an oil outlet of the oil supplementing pump and the oil inlet of the first multi-way valve are selectively communicated or separated through a first oil way. The hydraulic control system can accelerate the lifting speed of a main windlass driven by a windlass motor. When the hydraulic control system is applied to such engineering machinery as a dynamic compactor, as a main windlass is driven through the hydraulic control system realizing multi-pump converging, the lifting speed of the main windlass is accelerated, and the operation efficiency is improved.

Description

Hydraulic control system and the construction machinery and equipment with this hydraulic control system
Technical field
The present invention relates to engineering machinery field, more specifically, relate to a kind of hydraulic control system and the construction machinery and equipment with this hydraulic control system.
Background technology
Dynamic compaction machinery is when carrying out ramming operation, and need master winch to promote hammer ram, after hammer ram is risen to certain height, hammer ram comes off from suspension hook, compacting foundation.From the workflow of strong rammer, the hoisting speed of hammer ram decides work efficiency, and speed is faster, and efficiency is higher.
For driving the main of master winch to drive by variable dual-pump in the hydraulic control system of the master winch of dynamic compaction machinery of the prior art, but when variable dual-pump drives master winch to promote, hoisting speed can be relatively slow.
Summary of the invention
The construction machinery and equipment that the object of the invention is to provide a kind of hydraulic control system and has this hydraulic control system, this hydraulic control system can improve the hoisting speed of the elevator that hoist motor drives.
First aspect present invention provides a kind of hydraulic control system, comprising: the first main oil pump; Hoist motor and balance cock group, hoist motor and balance cock group comprise the first hydraulic fluid port and the second hydraulic fluid port; First multiway valve, first multiway valve comprises oil inlet, the first actuator port and the second actuator port, the oil outlet of the first main oil pump is communicated with the oil inlet of the first multiway valve, first actuator port of the first multiway valve is communicated with the first hydraulic fluid port, and the second actuator port of the first multiway valve is communicated with the second hydraulic fluid port; Slippage pump, the oil outlet of slippage pump and the oil inlet of the first multiway valve are selectively communicated with by the first oil circuit or disconnect.
Further, hydraulic control system also comprises: the second main oil pump; Second multiway valve, second multiway valve comprises oil inlet, the first actuator port and the second actuator port, the oil outlet of the second main oil pump is communicated with the oil inlet of the second multiway valve, first actuator port of the second multiway valve is communicated with the first hydraulic fluid port, and the second actuator port of the second multiway valve is communicated with the second hydraulic fluid port.
Further, the first oil circuit comprises change-over valve, and change-over valve comprises oil inlet, the first oil outlet and the second oil outlet; Change-over valve has the first control position and the second control position, at the first control position of change-over valve, the oil inlet of change-over valve is communicated with the first oil outlet of change-over valve, the oil inlet of change-over valve and the second oil outlet of change-over valve disconnect, at the second control position of change-over valve, the oil inlet of change-over valve and the first oil outlet of change-over valve disconnect, and the oil inlet of change-over valve is communicated with the second oil outlet of change-over valve; The oil inlet of change-over valve has with the oil outlet of slippage pump the state be communicated with, and the first oil outlet of change-over valve is communicated with the oil inlet of the first multiway valve, and the second oil outlet of change-over valve is communicated with fuel tank.
Further, change-over valve is solenoid directional control valve.
Further, first oil circuit also comprises relief arrangement, and relief arrangement comprises oil inlet, oil outlet and oil discharge outlet, and the oil inlet of relief arrangement is connected with the oil outlet of slippage pump, the oil outlet of relief arrangement has with the oil inlet of change-over valve the state be communicated with, and the oil discharge outlet of relief arrangement is connected with fuel tank.
Further, relief arrangement comprises: the first check valve, and the oil inlet of the first check valve is connected with the oil inlet of relief arrangement, and the oil outlet of the first check valve is connected with the oil outlet of relief arrangement; By pass valve, by pass valve comprises oil inlet, oil outlet and control port, and the oil inlet of by pass valve is connected with the oil inlet of relief arrangement, and the oil outlet of by pass valve is connected with the oil outlet of relief arrangement, and the control port of by pass valve is connected with the oil outlet of the first check valve.
Further, first oil circuit also comprises the second check valve, first oil outlet of change-over valve is communicated with by the second check valve with the oil inlet of the first multiway valve, and the oil inlet of the second check valve is connected with the first oil outlet of change-over valve, and the oil outlet of the second check valve is connected with the oil inlet of the first multiway valve.
Further, the first oil circuit also comprises rotovalve, and rotovalve comprises oil inlet, oil outlet and oil discharge outlet; Rotovalve has primary importance and the second place, in the primary importance of rotovalve, the oil inlet of rotovalve is communicated with the oil outlet of rotovalve, the oil inlet of rotovalve and the oil discharge outlet of rotovalve disconnect, in the second place of rotovalve, the oil inlet of rotovalve and the oil outlet of rotovalve disconnect, and the oil inlet of rotovalve is communicated with the oil discharge outlet of rotovalve; Wherein, the oil inlet of rotovalve is communicated with the oil outlet of slippage pump, and the oil outlet of rotovalve is connected with the oil inlet of change-over valve, and the oil discharge outlet of rotovalve is communicated with fuel tank.
Further, rotovalve is hydraulic control rotovalve.
Further, hydraulic control system also comprises priority valve, and priority valve comprises the first actuator port and the second actuator port; First multiway valve also comprises first guide's hydraulic fluid port and second guide's hydraulic fluid port, and first guide's hydraulic fluid port of the first multiway valve is connected with the first actuator port of priority valve, and second guide's hydraulic fluid port of the first multiway valve is connected with the second actuator port of priority valve; Second multiway valve also comprises first guide's hydraulic fluid port and second guide's hydraulic fluid port, and first guide's hydraulic fluid port of the second multiway valve is connected with the first actuator port of priority valve, and second guide's hydraulic fluid port of the second multiway valve is connected with the second actuator port of priority valve.
Second aspect present invention also provides a kind of construction machinery and equipment, comprises master winch and for controlling the hydraulic control system that master winch rotates, wherein hydraulic control system is the hydraulic control system any one of according to a first aspect of the present invention.
Further, construction machinery and equipment also comprises swing type mechanism and controls the hydraulic gyration control system of swing type mechanism motion, and wherein, the control oil of hydraulic gyration control system is from slippage pump.
According to hydraulic control system of the present invention and the construction machinery and equipment with this hydraulic control system, together with the hydraulic oil interflow that hydraulic control system is pumped by hydraulic oil that slippage pump is pumped and the first main oil pump, realize many pumps interflow, the hoist motor of common driving master winch and the work of balance cock group, therefore, this hydraulic control system can improve the hoisting speed of the master winch that hoist motor drives.When this hydraulic control system is applied to the construction machinery and equipments such as dynamic compaction machinery, the hydraulic control system of being collaborated by many pumps due to master winch is driven, and adds the hoisting speed of master winch, improves operating efficiency.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the principle of work schematic diagram of the hydraulic control system of the preferred embodiment of the present invention.
Detailed description of the invention
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
It should be noted that used term is only to describe detailed description of the invention here, and be not intended to restricted root according to illustrative embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to comprise plural form, in addition, it is to be further understood that, when use belongs to " comprising " and/or " comprising " in this manual, it indicates existing characteristics, step, operation, device, assembly and/or their combination.
As shown in Figure 1, the hydraulic control system of the preferred embodiment of the present invention mainly comprises variable dual-pump 1, hoist motor and balance cock group 7, first multiway valve 8, second multiway valve 9 and slippage pump 2.Variable dual-pump 1 comprises the first main oil pump 11 and the second main oil pump 12.Hoist motor and balance cock group 7 comprise the first hydraulic fluid port 7A and the second hydraulic fluid port 7B.First multiway valve 8 comprises oil inlet 8P, the first actuator port 8A and the second actuator port 8B.The oil outlet of the first main oil pump 11 is communicated with the oil inlet 8P of the first multiway valve 8.First actuator port 8A of the first multiway valve 8 is communicated with the first hydraulic fluid port 7A.Second actuator port 8B of the first multiway valve 8 is communicated with the second hydraulic fluid port 7B.Second multiway valve 9 comprises oil inlet 9P, the first actuator port 9A and the second actuator port 9B.The oil outlet of the second main oil pump 12 is communicated with the oil inlet 9P of the second multiway valve 9.First actuator port 9A of the second multiway valve 9 is communicated with the first hydraulic fluid port 7A.Second actuator port 9B of the second multiway valve 9 is communicated with the second hydraulic fluid port 7B.The oil outlet of slippage pump 2 and the oil inlet 8P of the first multiway valve 8 are selectively communicated with by the first oil circuit or disconnect.
The hydraulic oil that this hydraulic control system passes through slippage pump 2 to pump is together with the hydraulic oil interflow that variable dual-pump 1 pumps, realize three pump interflow, hoist motor and the balance cock group 7 of common driving master winch work, therefore, this hydraulic control system can improve the hoisting speed of the master winch that hoist motor drives.
Preferably, in the present embodiment, in order to being selectively communicated with or disconnection of oil inlet 8P of the oil outlet with the first multiway valve 8 that realize slippage pump 2, the first oil circuit comprises change-over valve 4.
As shown in Figure 1, change-over valve 4 comprises oil inlet 4P, the first oil outlet 4A and the second oil outlet 4T.Change-over valve 4 has the first control position and the second control position.At the first control position of change-over valve 4, the oil inlet 4P of change-over valve 4 is communicated with the first oil outlet 4A of change-over valve 4, and the oil inlet 4P of change-over valve 4 and the second oil outlet 4T of change-over valve 4 disconnects.At the second control position of change-over valve 4, the oil inlet 4P of change-over valve 4 and the first oil outlet 4A of change-over valve 4 disconnects, and the oil inlet 4P of change-over valve 4 is communicated with the second oil outlet 4T of change-over valve 4.Wherein, the oil inlet 4P of change-over valve 4 has with the oil outlet of slippage pump 2 state be communicated with, and the first oil outlet 4A of change-over valve 4 is communicated with the oil inlet 8P of the first multiway valve 8, and the second oil outlet 4T of change-over valve 4 is communicated with fuel tank.
The effect of change-over valve 4 is whether hydraulic control control system realizes three pump interflow.When needs three pump collaborates, change-over valve 4 switches to the first control position, connects the oil circuit of slippage pump 2 and the first multiway valve 8, makes slippage pump 2 and variable dual-pump three pump interflow.More preferably, change-over valve 4 is solenoid directional control valve, such as, can be two-bit triplet solenoid directional control valve.
As shown in Figure 1, in the present embodiment, first oil circuit also comprises relief arrangement 6, relief arrangement 6 comprises oil inlet 6P, oil outlet 6A and oil discharge outlet 6T, the oil inlet 6P of relief arrangement 6 is connected with the oil outlet of slippage pump 2, the oil outlet 6A of relief arrangement 6 has with the oil inlet 4P of change-over valve 4 state be communicated with, and the oil discharge outlet 6T of relief arrangement 6 is connected with fuel tank.
Particularly, relief arrangement 6 comprises the first check valve 62 and by pass valve 61.The oil inlet of the first check valve 62 is connected with the oil inlet 6P of relief arrangement 6, and the oil outlet of the first check valve 62 is connected with the oil outlet 6T of relief arrangement 6.By pass valve 61 comprises oil inlet, oil outlet and control port, the oil inlet of by pass valve 61 is connected with the oil inlet 6P of relief arrangement 6, the oil outlet of by pass valve 61 is connected with the oil outlet 6T of relief arrangement 6, and the control port of by pass valve 61 is connected with the oil outlet of the first check valve 62.
During three pump interflow work, when the operation pressure i.e. pressure of the first check valve 62 oil outlet side of hydraulic control system is greater than the setting value of by pass valve 61 of relief arrangement 6, by pass valve 61 is opened, the hydraulic oil that slippage pump 2 pumps flows back to fuel tank by by pass valve 61, slippage pump 2 no longer participates in the work collaborated, and three pump interflow become the Dual-pump flow-converging of variable dual-pump 1.
In addition preferably, the first oil circuit also comprises the second check valve 5.First oil outlet 4A of change-over valve 4 is communicated with by the second check valve 5 with the oil inlet 8P of the first multiway valve 8, the oil inlet 5A of the second check valve 5 is connected with the first oil outlet 4A of change-over valve 4, and the oil outlet 5B of the second check valve 5 is connected with the oil inlet 8P of the first multiway valve 8.The hydraulic oil that second check valve 5 can stop the second main oil pump 12 to pump enters into the oil outlet of slippage pump 2, thus protection slippage pump 2.
As shown in Figure 1, in the present embodiment, the first oil circuit also comprises rotovalve 3.Rotovalve 3 comprises oil inlet 3P, oil outlet 3C and oil discharge outlet 3T.Rotovalve 3 has primary importance and the second place.In primary importance, the oil inlet 3P of rotovalve 3 is communicated with the oil outlet 3C of rotovalve 3, and the oil inlet 3P of the rotovalve 3 and oil discharge outlet 3T of rotovalve 3 disconnects.In the second place, the oil inlet 3P of the rotovalve 3 and oil outlet 3C of rotovalve 3 disconnects, and the oil inlet 3P of rotovalve 3 is communicated with the oil discharge outlet 3T of rotovalve 3.Wherein, the oil inlet 3P of rotovalve 3 is communicated with the oil outlet of slippage pump 2, and the oil outlet 3C of rotovalve 3 is connected with the oil inlet 4P of change-over valve 4, and the oil discharge outlet 3T of rotovalve 3 is communicated with fuel tank.The oil outlet 3C of rotovalve 3 is not communicated with the internal oil passages of oil discharge outlet 3T.
The object arranging rotovalve 3 is that the hydraulic gyration control system of the swing type mechanism of the construction machinery and equipment for hydraulic control system place provides and controls oil.Preferably, rotovalve 3 is hydraulic control rotovalve.This setting is beneficial to minimizing equipment cost, improves capacity utilization rate.
As shown in Figure 1, the present embodiment adopts three six-way transfer valves as rotovalve 3, these three six-way transfer valves have meta and upper and the next two control positioies, when these three six-way transfer valves are in meta, namely the aforementioned primary importance of rotovalve 3 is in, and these three six-way valves are when being in upper and the next, due in three oil outlets of these three six-way transfer valves in this hydraulic control system, except the oil outlet 3C of centre, upper and lower two oil outlets are all connected to fuel tank by non-return valve, and the installation direction of non-return valve flows to fuel tank for preventing hydraulic oil, therefore, the condition that the upper and the next second place all meeting rotovalve 3 requires, therefore, upper and the next one can be selected as the second place.In addition, though the annexation of not shown rotovalve 3 and hydraulic gyration control system in FIG, but, preferably, by controlling the valve position of rotovalve 3, the hydraulic oil of slippage pump 2 pumping can be made to be delivered to this hydraulic gyration control system by this rotovalve 3, to control the work of rotary system, preferably, when slippage pump 2 is hydraulic gyration control system conveying liquid force feed, stop hoist motor and balance cock group 7 conveying liquid force feed.
Preferably, hydraulic control system also comprises priority valve 10.Priority valve 10 comprises the first actuator port 10A and the second actuator port 10B.First multiway valve 8 also comprises first guide's hydraulic fluid port 8a and second guide's hydraulic fluid port 8b, first guide's hydraulic fluid port 8a of the first multiway valve 8 is connected with the first actuator port 10a of priority valve 10, and second guide's hydraulic fluid port 8b of the first multiway valve 8 is connected with the second actuator port 10b of priority valve 10.Second multiway valve 9 also comprises first guide's hydraulic fluid port 9a and second guide's hydraulic fluid port 9b, first guide's hydraulic fluid port 9a of the second multiway valve 9 is connected with the first actuator port 10a of priority valve 10, and second guide's hydraulic fluid port 9b of the second multiway valve 9 is connected with the second actuator port 10b of priority valve 10.Wherein, first guide's hydraulic fluid port 8a of the first multiway valve 8 and second guide's hydraulic fluid port 8b controls the first actuator port 8A and the second actuator port 8B of the first multiway valve 8 respectively.First guide's hydraulic fluid port 9a of the second multiway valve 9 and second guide's hydraulic fluid port 9b controls the first actuator port 9A and the second actuator port 9B of the second multiway valve 9 respectively.
First multiway valve 8 and the second multiway valve 9 can be three six-way transfer valves particularly.
It should be noted that, although arrange slippage pump 2 in the present embodiment on the basis of variable dual-pump 1, in unshowned embodiment, when only having a main oil pump or having more main oil pump, the thought utilizing slippage pump 2 and the many pumps of main oil pump to collaborate of the present invention also can be applied.And the quantity of multiway valve is two in the present embodiment, but in other embodiments, the quantity of multiway valve can be arranged as required.In the present embodiment, slippage pump 2 carries out repairing by means of only the first multiway valve 8 pairs of hoist motors and balance cock group 7, but in other embodiments, slippage pump 2 also carries out repairing by several or whole multiway valve to hoist motor and balance cock group 7.In addition, in the present embodiment, slippage pump 2 is preferably fix-displacement pump, but in unshowned embodiment, slippage pump 2 also can be considered to adopt controllable capacity pump.And although illustrate only a slippage pump 2 in the present embodiment, the quantity of slippage pump 2 also can be set to more than 2 as required.
In the present embodiment because the first multiway valve 8 accepts two oil pump feeds, therefore, the latus rectum of the first multiway valve 8 is larger than the latus rectum of the second multiway valve 9.If the hydraulic oil of slippage pump 2 accesses two multiway valve, then need the latus rectum of increasing two valves, certainly, access two multiway valve and connect complicated, convenient not for preferred embodiment during practical operation.
The present invention also provides a kind of construction machinery and equipment, and this project machinery comprises master winch and for controlling the hydraulic control system that master winch rotates, wherein, hydraulic control system is aforesaid hydraulic control system.Construction machinery and equipment can be such as dynamic compaction machinery or hoisting crane etc.When this hydraulic control system is applied to construction machinery and equipment, because the hydraulic control system of master winch by three pump interflow drives, adds the hoisting speed of elevator, improve operating efficiency.
Preferably, construction machinery and equipment also comprises swing type mechanism and controls the hydraulic gyration control system of swing type mechanism motion, and wherein, the control oil of hydraulic gyration control system is from slippage pump 2.This setting makes slippage pump one pump dual-purpose, is beneficial to minimizing equipment cost, improves capacity utilization rate.
The principle of work of above hydraulic control system is as follows:
When not needing three pump interflow, change-over valve 4 must not be electric, and change-over valve 4 switches to the second control position, and the oil inlet 4P of change-over valve 4 communicates with the second oil outlet 4T, thus the oil inlet 4P of change-over valve 4 is communicated with fuel tank.The hydraulic oil that slippage pump 2 pumps enters the oil inlet 3P of rotovalve 3 by relief arrangement 6, when the rotary system work of dynamic compaction machinery, rotovalve 3 is in the second control position, hydraulic oil flows back to fuel tank by the oil discharge outlet 3T of rotovalve 3, when the rotary system of dynamic compaction machinery does not work, rotovalve 3 is in the first control position, and hydraulic oil enters the oil inlet 4P of change-over valve 4 through the oil outlet 3C of rotovalve 3, flows back to fuel tank by the second oil outlet 4T of change-over valve 4.
When needing three pump interflow, open change-over valve 4, change-over valve 4 switches to the first control position, and the oil inlet 4P of change-over valve 4 communicates with the first oil outlet 4A.During due to three pump interflow work, for the mode of operation of mainly compacting foundation dynamic compaction machinery, now the rotary system of dynamic compaction machinery is failure to actuate.The hydraulic oil that slippage pump 2 pumps enters into the oil inlet 4P of change-over valve 4 by the oil outlet 3C of rotovalve 3, enters into the oil inlet 8P of the first multiway valve 8 from the first oil outlet 4A of change-over valve 4 through the second check valve 5.Operated pilot valve 10, pilot control oil controls the unlatching of each multiway valve.The hydraulic oil of slippage pump 2 and variable dual-pump 1 collaborates at the corresponding hydraulic fluid port of hoist motor and balance cock group 7 after each multiway valve, thus realizes three pumps interflow driving hoist motors, improves the hoisting speed of master winch.
Known according to above description, the above embodiments of the present invention achieve following technique effect: when after the hydraulic pressure control control system at three pump interflow using the present embodiment in dynamic compaction machinery, when needs three pump collaborates, change-over valve is made to be in the first control position, operated pilot valve 10, master winch is promoted, now the hydraulic oil that pumps of the first main oil pump 11, second main oil pump 12, slippage pump 2 is after the first multiway valve 8 and the second multiway valve 9, collaborate in the import of hoist motor and balance cock group, drive hoist motor work.Behind three pump interflow, the hydraulic oil supply hoist motor work provided owing to there being three pumps, hoist motor rotating speed is than fast during variable dual-pump 1 fuel feeding, this adds increased the work speed of master winch, the hoisting speed of master winch is improved, shorten weight rises to specified altitude assignment time from ground, improve the operating efficiency of the construction machinery and equipments such as dynamic compaction machinery.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. a hydraulic control system, is characterized in that, comprising:
First main oil pump (11);
Hoist motor and balance cock group (7), described hoist motor and balance cock group (7) comprise the first hydraulic fluid port (7A) and the second hydraulic fluid port (7B);
First multiway valve (8), described first multiway valve (8) comprises oil inlet (8P), the first actuator port (8A) and the second actuator port (8B), the oil outlet of described first main oil pump (11) is communicated with the oil inlet (8P) of described first multiway valve (8), first actuator port (8A) of described first multiway valve (8) is communicated with described first hydraulic fluid port (7A), and second actuator port (8B) of described first multiway valve (8) is communicated with described second hydraulic fluid port (7B);
Slippage pump (2), the oil outlet of described slippage pump (2) and the oil inlet (8P) of described first multiway valve (8) are selectively communicated with by the first oil circuit or disconnect.
2. hydraulic control system according to claim 1, is characterized in that, described hydraulic control system also comprises:
Second main oil pump (12);
Second multiway valve (9), described second multiway valve (9) comprises oil inlet (9P), the first actuator port (9A) and the second actuator port (9B), the oil outlet of described second main oil pump (12) is communicated with the oil inlet (9P) of described second multiway valve (9), first actuator port (9A) of described second multiway valve (9) is communicated with described first hydraulic fluid port (7A), and second actuator port (9B) of described second multiway valve (9) is communicated with described second hydraulic fluid port (7B).
3. hydraulic control system according to claim 1 and 2, it is characterized in that, described first oil circuit comprises change-over valve (4), and described change-over valve (4) comprises oil inlet (4P), the first oil outlet (4A) and the second oil outlet (4T), described change-over valve (4) has the first control position and the second control position, at the first control position of described change-over valve (4), the oil inlet (4P) of described change-over valve (4) is communicated with first oil outlet (4A) of described change-over valve (4), the oil inlet (4P) of described change-over valve (4) and second oil outlet (4T) of described change-over valve (4) disconnect, at the second control position of described change-over valve (4), the oil inlet (4P) of described change-over valve (4) and first oil outlet (4A) of described change-over valve (4) disconnect, the oil inlet (4P) of described change-over valve (4) is communicated with second oil outlet (4T) of described change-over valve (4), the oil inlet (4P) of described change-over valve (4) has with the oil outlet of described slippage pump (2) state be communicated with, first oil outlet (4A) of described change-over valve (4) is communicated with the oil inlet (8P) of described first multiway valve (8), and second oil outlet (4T) of described change-over valve (4) is communicated with fuel tank.
4. hydraulic control system according to claim 3, is characterized in that, described change-over valve (4) is solenoid directional control valve.
5. hydraulic control system according to claim 3, it is characterized in that, described first oil circuit also comprises relief arrangement (6), described relief arrangement (6) comprises oil inlet (6P), oil outlet (6A) and oil discharge outlet (6T), the oil inlet (6P) of described relief arrangement (6) is connected with the oil outlet of described slippage pump (2), the oil outlet (6A) of described relief arrangement (6) has with the oil inlet (4P) of described change-over valve (4) state be communicated with, the oil discharge outlet (6T) of described relief arrangement (6) is connected with fuel tank.
6. hydraulic control system according to claim 3, is characterized in that, described relief arrangement (6) comprising:
First check valve (62), the oil inlet of described first check valve (62) is connected with the oil inlet (6P) of described relief arrangement (6), and the oil outlet of described first check valve (62) is connected with the oil outlet (6T) of described relief arrangement (6);
By pass valve (61), described by pass valve (61) comprises oil inlet, oil outlet and control port, the oil inlet of described by pass valve (61) is connected with the oil inlet (6P) of described relief arrangement (6), the oil outlet of described by pass valve (61) is connected with the oil outlet (6T) of described relief arrangement (6), and the control port of described by pass valve (61) is connected with the oil outlet of described first check valve (62).
7. hydraulic control system according to claim 3, it is characterized in that, described first oil circuit also comprises the second check valve (5), first oil outlet (4A) of described change-over valve (4) is communicated with by described second check valve (5) with the oil inlet (8P) of described first multiway valve (8), the oil inlet (5A) of described second check valve (5) is connected with first oil outlet (4A) of described change-over valve (4), the oil outlet (5B) of described second check valve (5) is connected with the oil inlet (8P) of described first multiway valve (8).
8. hydraulic control system according to claim 3, it is characterized in that, described first oil circuit also comprises rotovalve (3), and described rotovalve (3) comprises oil inlet (3P), oil outlet (3C) and oil discharge outlet (3T), described rotovalve (3) has primary importance and the second place, in the primary importance of described rotovalve (3), the oil inlet (3P) of described rotovalve (3) is communicated with the oil outlet (3C) of described rotovalve (3), the oil inlet (3P) of described rotovalve (3) and the oil discharge outlet (3T) of described rotovalve (3) disconnect, in the second place of described rotovalve (3), the oil inlet (3P) of described rotovalve (3) and the oil outlet (3C) of described rotovalve (3) disconnect, the oil inlet (3P) of described rotovalve (3) is communicated with the oil discharge outlet (3T) of described rotovalve (3), wherein, the oil inlet (3P) of described rotovalve (3) is communicated with the oil outlet of described slippage pump (2), the oil outlet (3C) of described rotovalve (3) is connected with the oil inlet (4P) of described change-over valve (4), and the oil discharge outlet (3T) of described rotovalve (3) is communicated with fuel tank.
9. hydraulic control system according to claim 1, is characterized in that, described rotovalve (3) is hydraulic control rotovalve.
10. hydraulic control system according to claim 2, is characterized in that,
Described hydraulic control system also comprises priority valve (10), and described priority valve (10) comprises the first actuator port (10A) and the second actuator port (10B);
Described first multiway valve (8) also comprises first guide's hydraulic fluid port (8a) and second guide's hydraulic fluid port (8b), first guide's hydraulic fluid port (8a) of described first multiway valve (8) is connected with first actuator port (10a) of described priority valve (10), and second guide's hydraulic fluid port (8b) of described first multiway valve (8) is connected with second actuator port (10b) of described priority valve (10);
Described second multiway valve (9) also comprises first guide's hydraulic fluid port (9a) and second guide's hydraulic fluid port (9b), first guide's hydraulic fluid port (9a) of described second multiway valve (9) is connected with first actuator port (10a) of described priority valve (10), and second guide's hydraulic fluid port (9b) of described second multiway valve (9) is connected with second actuator port (10b) of described priority valve (10).
11. 1 kinds of construction machinery and equipments, comprise master winch and for controlling the hydraulic control system that described master winch rotates, it is characterized in that, described hydraulic control system is hydraulic control system according to any one of claim 1 to 10.
12. construction machinery and equipments according to claim 11, it is characterized in that, described construction machinery and equipment also comprises swing type mechanism and controls the hydraulic gyration control system of described swing type mechanism motion, and wherein, the control oil of described hydraulic gyration control system is from described slippage pump (2).
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