CN203594061U - Rotation hydraulic control device of excavator movable arm platform - Google Patents

Rotation hydraulic control device of excavator movable arm platform Download PDF

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Publication number
CN203594061U
CN203594061U CN201320719163.6U CN201320719163U CN203594061U CN 203594061 U CN203594061 U CN 203594061U CN 201320719163 U CN201320719163 U CN 201320719163U CN 203594061 U CN203594061 U CN 203594061U
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China
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mouth
hydraulic motor
valve
port
hydraulic
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CN201320719163.6U
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Inventor
王伟耀
牛选平
薛传林
孙永建
高剑英
杨晶星
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SINO-FOREIGN JOINT VENTURE WORLD HEAVY INDUSTRY (CHINA) Co Ltd
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SINO-FOREIGN JOINT VENTURE WORLD HEAVY INDUSTRY (CHINA) Co Ltd
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Abstract

The utility model discloses a rotation hydraulic control device of an excavator movable arm platform. The rotation hydraulic control device comprises a double pump unit, a variable hydraulic motor, a main controller, a three-position hydraulic change-over valve, a shuttle valve, a proportional electromagnetic valve and a pressure sensor, the pressure sensor is connected with a P1 port of the shuttle valve, and a P2 port and a P3 port of the shuttle valve are connected with a control port A1 and a control port B1 of the three-position hydraulic change-over valve respectively; a P4 port of the proportional electromagnetic valve is connected with a Pi port of a variable hydraulic motor variable head and a guide pump output port of the double pump unit is connected with a P5 port of the proportional electromagnetic valve through a first overflowing valve; the main controller is respectively and electrically connected with the proportional electromagnetic valve and the pressure sensor through signal lines. According to the rotation hydraulic control device, energy loss of an excavator hydraulic system is reduced and the work efficiency is improved.

Description

Excavator swing arm platform revolution hydraulic control device
Technical field
The utility model relates to a kind of hydraulic system of excavator, especially a kind of for controlling the control device of excavator swing arm platform speed of gyration, belongs to engineering machinery hydraulic drive technology field.
Background technology
When excavator operation, swing arm platform must turn round frequently, and the rotating power resources of swing arm platform are in hydraulic motor, and hydraulic motor drives the revolution of swing arm platform by planetary reduction gear.Existing excavator hydraulic motor is constant displacement hydraulic motor, the incipient stage starting in the revolution of swing arm platform, in order to increase starting torque, when the rotating startup of swing arm platform, its speed must progressively raise speed from low to high, because the discharge capacity of constant displacement hydraulic motor is constant, its speed is also constant, therefore, the starting stage starting at constant displacement hydraulic motor, most of flow input constant displacement hydraulic motor of main pump output, fraction flow is by a pair of overflow valve overflow in constant displacement hydraulic motor assembly, reduce the flow of input constant displacement hydraulic motor, then the flow of main pump output is all inputted constant displacement hydraulic motor, make the rotating speed progressively speed-raising from low to high of constant displacement hydraulic motor, meet the rotating startup requirement of swing arm platform.Like this, in hydraulic motor start-up course, the time of general 1.5s, in overflow situation, calculates according to loading operation operating mode, and start-up course has accounted for turning course half the time.The overflow of swing arm platform revolution starting stage causes hydraulic fluid temperature to raise, and is the principal element that causes Hydraulic System Fever, has wasted the energy of hydraulic system.When particularly summer environment temperature is higher, higher hydraulic fluid temperature brings destabilizing factor to the normal work of Hydraulic Elements, and the fault of excavator hydraulic system is increased, and has a strong impact on operating efficiency.
Summary of the invention
The purpose of this utility model is to provide a kind of excavator swing arm platform revolution hydraulic control device and control method, reduces the energy loss of hydraulic system, improves the operating efficiency of excavator.
The utility model is achieved by the following technical programs:
A kind of excavator swing arm platform revolution hydraulic control device, comprise duplex pump unit, hydraulic motor, master controller, three hydraulicchange-over valve shuttle valves, proportion magnetic valve and pressure sensors, described hydraulic motor is variable hydraulic motor, the main pump delivery outlet of duplex pump unit is connected with PA mouth or the PB mouth of variable hydraulic motor respectively by three hydraulicchange-over valves, pressure sensor is connected with the P1 mouth of shuttle valve, and the P2 mouth of shuttle valve is controlled mouth with the A1 of three hydraulicchange-over valves respectively with P3 mouth, and control mouthful is connected with B1; The P4 mouth of proportion magnetic valve is connected with the Pi mouth of variable hydraulic motor variable head, and the pioneer pump delivery outlet of duplex pump unit is connected with the P5 mouth of proportion magnetic valve by the first overflow valve, and the DB mouth of variable hydraulic motor is connected with fuel tank; Master controller is electrically connected by holding wire respectively with proportion magnetic valve and pressure sensor.
Variable hydraulic motor passing ratio electromagnetic valve of the present utility model is controlled the controlled pressure oil flow of entering variable head, thereby hydraulic motor is slowly started, and from being smoothly transitted into higher rotation speed compared with the slow-speed of revolution.The utility model does not need, by a pair of overflow valve overflow in a part of flow process hydraulic motor assembly of main pump output, to have reduced the energy loss of excavator hydraulic system, has improved the operating efficiency of excavator.
In the time that hydraulic motor is braked, because rotating certain angle (being braking distance), effect of inertia hydraulic motor just stops, the utility model can be according to excavating the different requirements of tractor driver to braking distance, under the corresponding retrosequence instruction of master controller, progressively reduce the input current of proportion magnetic valve, slowly closing proportion magnetic valve, makes hydraulic motor according to the slow soft braking of braking time of setting, reduce retarding loss, improved retardation efficiency.
Advantage and disadvantage of the present utility model, by for illustration and explanation the non-limitative illustration by preferred embodiment below, these embodiment, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, hydraulic control device of the present utility model comprises duplex pump unit 1, hydraulic motor 2, master controller 3, three hydraulicchange-over valves 4, shuttle valve 5, proportion magnetic valve 6 and pressure sensor 7, hydraulic motor 2 is variable hydraulic motor, main pump 11 delivery outlets of duplex pump unit 1 are connected with PA mouth or the PB mouth of variable hydraulic motor 2 respectively by three hydraulicchange-over valves 4, pressure sensor 7 is connected with the P1 mouth of shuttle valve 5, the P2 mouth of shuttle valve 5 is controlled mouth with the B1 of three hydraulicchange-over valves 4 and is connected, P3 mouth is controlled mouth with the A1 of three hydraulicchange-over valves 4 and is connected, the P4 mouth of proportion magnetic valve 6 is connected with the Pi mouth of variable hydraulic motor variable head 21, the delivery outlet of the pioneer pump 12 of duplex pump unit 1 is connected with the P5 mouth of proportion magnetic valve 6 with the first overflow valve 8 by oil filter 101 successively, the DB mouth of variable hydraulic motor is connected with fuel tank 9, master controller 3 is electrically connected by holding wire 10 respectively with proportion magnetic valve 6 and pressure sensor 7.
The step that adopts the utility model to turn round startup and braking to excavator swing arm platform is as follows:
1) revolution of excavator swing arm platform starts: excavator hand propelled operating grip to 1 grade gear, commutate through the P2 mouth of shuttle valve 5 or three hydraulicchange-over valves 4 of the controlled pressure of P3 mouth oil promotion, the hydraulic oil of exporting from the main pump delivery outlet of duplex pump unit 1 flows to the PA mouth of hydraulic motor 2 through three hydraulicchange-over valves 4, drive hydraulic motor 2 to rotate; Now proportion magnetic valve 6 no signals are inputted in closed condition, and the Pi mouth of hydraulic motor variable head 21 inputs is zero without pressure oil input oil pressure; The position of hydraulic motor variable head 21 in maximum pump discharge output, rotating speed minimum torque maximum, hydraulic motor 21 starts excavator swing arm platform by planetary reduction gear 20 and slowly turns round.
2) controlled pressure oil promotion shuttle valve spool moves, and passs pressure sensor 7 through the P1 of shuttle valve 5 oral instructions, and pressure sensor 7 converts control fuel injection pressure signal to the signal of telecommunication and feeds back to master controller 3.
3) master controller 3 is according to the progressively input current of scaling up electromagnetic valve 6 of excavator swing arm revolution start up curve of setting, slowly open proportion magnetic valve 6, controlled pressure oil flow progressively strengthens, promote hydraulic motor variable head 21 and progressively reduce hydraulic motor discharge capacity, realize the progressively speed-raising of hydraulic motor 2, excavator swing arm speed of gyration progressively rises, until excavator swing arm rotate in place;
4) revolution of excavator swing arm platform stops: excavator hand propelled operating grip is to stopping gear, three hydraulicchange-over valves 4 are got back to meta, now excavator swing arm platform does not have moment to stop the rotation, master controller 3 is according to the curve that stops of setting, progressively reduce the input current of proportion magnetic valve 6, slowly closing proportion magnetic valve 6, hydraulic motor 2 progressively slows down, until stop operating completely, excavator swing arm platform stops at desired location and starts to carry out operation.
In addition to the implementation, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims (1)

1. an excavator swing arm platform revolution hydraulic control device, comprise duplex pump unit, hydraulic motor, master controller and three hydraulicchange-over valves, it is characterized in that, also comprise shuttle valve, proportion magnetic valve and pressure sensor, described hydraulic motor is variable hydraulic motor, the main pump delivery outlet of duplex pump unit is connected with PA mouth or the PB mouth of variable hydraulic motor respectively by three hydraulicchange-over valves, pressure sensor is connected with the P1 mouth of shuttle valve, and the P2 mouth of shuttle valve is controlled mouth with the A1 of three hydraulicchange-over valves respectively with P3 mouth, and control mouthful is connected with B1; The P4 mouth of proportion magnetic valve is connected with the Pi mouth of variable hydraulic motor variable head, and the pioneer pump delivery outlet of duplex pump unit is connected with the P5 mouth of proportion magnetic valve by the first overflow valve, and the DB mouth of variable hydraulic motor is connected with fuel tank; Master controller is electrically connected by holding wire respectively with proportion magnetic valve and pressure sensor.
CN201320719163.6U 2013-11-15 2013-11-15 Rotation hydraulic control device of excavator movable arm platform Active CN203594061U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320719163.6U CN203594061U (en) 2013-11-15 2013-11-15 Rotation hydraulic control device of excavator movable arm platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320719163.6U CN203594061U (en) 2013-11-15 2013-11-15 Rotation hydraulic control device of excavator movable arm platform

Publications (1)

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CN203594061U true CN203594061U (en) 2014-05-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103628512A (en) * 2013-11-15 2014-03-12 中外合资沃得重工(中国)有限公司 Rotary hydraulic control device of excavator movable arm platform and control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103628512A (en) * 2013-11-15 2014-03-12 中外合资沃得重工(中国)有限公司 Rotary hydraulic control device of excavator movable arm platform and control method
CN103628512B (en) * 2013-11-15 2016-01-27 中外合资沃得重工(中国)有限公司 Excavator swing arm platform revolution hydraulic control method

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