CN102616694A - Hydraulic control loop of winding mechanism - Google Patents
Hydraulic control loop of winding mechanism Download PDFInfo
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- CN102616694A CN102616694A CN 201210088315 CN201210088315A CN102616694A CN 102616694 A CN102616694 A CN 102616694A CN 201210088315 CN201210088315 CN 201210088315 CN 201210088315 A CN201210088315 A CN 201210088315A CN 102616694 A CN102616694 A CN 102616694A
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Abstract
The invention discloses a hydraulic control loop of a winding mechanism. The winding mechanism comprises a winding drum (1), a reducer and a winding motor (2), the input end of the winding drum (1) is connected with the output end of the reducer through a clutch (3), the input end of the reducer is connected with the output end of the winding motor (2), the hydraulic control loop comprises a first reversing valve (4) and a second reversing valve (5), a working oil port of the first reversing valve (4) is communicated with a pressure oil port of the second reversing valve (5), a working oil port of the second reversing valve (5) is communicated with a control port of the clutch (3), and an oil return port of the first reversing valve (4) and an oil return port of the second reversing valve (5) are respectively communicated with an oil tank. The hydraulic control loop of the winding mechanism has high reliability and construction safety.
Description
Technical field
The present invention relates to engineering machinery field, particularly, relate to a kind of hydraulic control circuit of hoisting mechanism.
Background technology
The hoisting mechanism of construction machinery and equipment (for example crawler crane and strong rammer equipment etc.) generally includes elevator reel, retarder and hoist motor; The input end of elevator reel is connected through power-transfer clutch with the mouth of retarder; The input end of retarder is connected with the mouth of hoist motor; Hoist motor is then controlled through hydraulic control circuit, to drive the elevator reel.Power-transfer clutch is generally hydraulic controlled clutch; In the hydraulic control circuit of existing hoisting mechanism; Usually come power-transfer clutch is controlled through a two position three way directional control valve, the actuator port of this change-over valve is communicated with pressure hydraulic fluid port and pressure-source communication with the control mouth of power-transfer clutch; Return opening is communicated with fuel tank, and the control mouth of control clutch is communicated with pressure-source communication or with fuel tank thereby come optionally through the position of switching this change-over valve.When the control mouth of this power-transfer clutch does not have pressure when (being communicated with fuel tank); Then power-transfer clutch is in engagement state, makes the input end of elevator reel and the mouth of retarder be connected, and plays carry-over moment; When the control mouth of power-transfer clutch has pressure (with pressure-source communication); Then power-transfer clutch is in disengaged condition, makes the input end of elevator reel and the mouth of retarder throw off, and the elevator reel is in free state.In the hoisting mechanism working process, need control power-transfer clutch according to operating mode,, hoisting mechanism make power-transfer clutch be in engagement state when hoisting,, hoisting mechanism make power-transfer clutch be in disengaged condition when freely transferring.And hoisting mechanism is manually operated through operating personal usually; If operating personal not as prescribed ground carries out maloperation; For example the change-over valve to control clutch carries out maloperation when hoisting mechanism need hoist; Thereby make the control mouth and the pressure-source communication of power-transfer clutch, can cause throw-out-of clutch and cause the generation of safety misadventure.Therefore the reliability and the working security of the hydraulic control circuit of existing hoisting mechanism are lower.
Summary of the invention
The hydraulic control circuit that the purpose of this invention is to provide the higher hoisting mechanism of a kind of reliability and working security.
To achieve these goals; The present invention provides a kind of hydraulic control circuit of hoisting mechanism; This hoisting mechanism comprises elevator reel, retarder and hoist motor; The input end of said elevator reel is connected through power-transfer clutch with the mouth of said retarder, and the input end of said retarder is connected with the mouth of said hoist motor, wherein; Said hydraulic control circuit comprises first change-over valve and second change-over valve; The actuator port of said first change-over valve is communicated with the pressure hydraulic fluid port of said second change-over valve, and the actuator port of said second change-over valve is communicated with the control mouth of said power-transfer clutch, and the return opening of the return opening of said first change-over valve and second change-over valve is communicated with fuel tank respectively.
Preferably; Said hydraulic control circuit also comprises the 3rd change-over valve on the pipeline that is serially connected between said first change-over valve and second change-over valve; The pressure hydraulic fluid port of the 3rd change-over valve is communicated with the actuator port of said first change-over valve, and the actuator port of said the 3rd change-over valve is communicated with the pressure hydraulic fluid port of said second change-over valve, when said the 3rd change-over valve is in primary importance; The pressure hydraulic fluid port of the 3rd change-over valve and actuator port conducting; When said the 3rd change-over valve was in the second place, the pressure hydraulic fluid port of the 3rd change-over valve and the unidirectional conducting of actuator port only allowed hydraulic oil to flow to the actuator port of the 3rd change-over valve from the pressure hydraulic fluid port of the 3rd change-over valve.
Preferably, said hydraulic control circuit also comprises the energy storage on the pipeline between the control mouth of other actuator port that is connected on said second change-over valve and said power-transfer clutch.
Preferably, said hydraulic control circuit also comprises first constant pressure source that is communicated with the pressure hydraulic fluid port of said first change-over valve.
Preferably; Said hydraulic control circuit also comprises main valve, shuttle valve and the 4th change-over valve; Two working oil path of said hoist motor are communicated with two actuator ports of said main valve respectively; Two inlets of said shuttle valve are communicated with two working oil path of said hoist motor respectively, and the outlet of said shuttle valve is communicated with the control mouth of said the 4th change-over valve, and the actuator port of said the 4th change-over valve is communicated with the control mouth of said second change-over valve.
Preferably; Said hydraulic control circuit also comprises priority valve and the 5th change-over valve; The pressure hydraulic fluid port of the 5th change-over valve is communicated with the actuator port of said the 4th change-over valve; The return opening of the 5th change-over valve is communicated with the actuator port of said priority valve, and the actuator port of the 5th change-over valve is communicated with the control mouth of said the 3rd change-over valve.
Preferably, also be provided with first normally closed brake on the said elevator reel, the actuator port of said the 5th change-over valve also is communicated with the control mouth of said first normally closed brake.
Preferably, said hydraulic control circuit also comprises one-way throttle valve, and this one-way throttle valve is serially connected on the pipeline between the control mouth of control mouth and said the 3rd change-over valve of actuator port and said first normally closed brake of said the 5th change-over valve.
Preferably, also be provided with second normally closed brake on the said retarder, the actuator port of said the 4th change-over valve also is communicated with the control mouth of said second normally closed brake.
Preferably, said hydraulic control circuit also comprises the 6th change-over valve, and the 6th change-over valve is serially connected on the pipeline between the control mouth of control mouth and said second change-over valve of actuator port and said second normally closed brake of said the 4th change-over valve.
Preferably, said hydraulic control circuit also comprises second constant pressure source, and this second constant pressure source is communicated with the pressure hydraulic fluid port of said the 4th change-over valve and the pressure hydraulic fluid port of said priority valve.
Preferably, the foot-operated proportional pilot valve of said priority valve.
Preferably, said hydraulic control circuit also comprises the bar handle that is communicated with the control mouth of said main valve.
Through technique scheme, come control clutch jointly through first change-over valve and these two change-over valves of second change-over valve.When hoisting mechanism need play lift operations; Operating personal normally should make win change-over valve and second change-over valve all be in the position that actuator port is communicated with return opening; Thereby make the control mouth of power-transfer clutch of hoisting mechanism be communicated with and pressure release, so that power-transfer clutch is in engagement state with fuel tank.And according to technique scheme provided by the invention; Through being set, two change-over valves have double shield; Even therefore operating personal has carried out maloperation to one of them change-over valve, make this change-over valve be in the position that actuator port is communicated with the pressure hydraulic fluid port by error, but as long as another change-over valve is in correct position; The control mouth of power-transfer clutch just can be communicated with and pressure release with fuel tank; Power-transfer clutch still can correctly be in engagement state, and can not cause the generation of safety misadventure because of the maloperation of operating personal, thereby the reliability of the hydraulic control circuit of above-mentioned hoisting mechanism and working security are higher.
Other features and advantages of the present invention will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification sheets, is used to explain the present invention with the following specific embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic block diagram of hydraulic control circuit of the hoisting mechanism of a preferred embodiment of the invention.
Description of reference numerals
1 elevator reel; 2 hoist motors;
3 power-transfer clutchs; 4 first change-over valves;
5 second change-over valves; 6 the 3rd change-over valves;
7 energy storages; 8 main valves;
9 shuttle valves; 10 the 4th change-over valves;
11 priority valves; 12 the 5th change-over valves;
13 first normally closed brakes; 14 one-way throttle valves;
15 second normally closed brakes; 16 the 6th change-over valves;
17 first constant pressure sources; 18 bar handles;
19 second constant pressure sources; 20 controllable capacity pumps;
21 filters; 22 balance cocks.
The specific embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that the specific embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
As shown in Figure 1; A kind of hydraulic control circuit of hoisting mechanism is provided according to one embodiment of the present invention; This hoisting mechanism comprises elevator reel 1, retarder and hoist motor 2; The input end of said elevator reel 1 is connected through power-transfer clutch 3 with the mouth of said retarder, and the input end of said retarder is connected with the mouth of said hoist motor 2, wherein; Said hydraulic control circuit comprises first change-over valve 4 and second change-over valve 5; The actuator port of said first change-over valve 4 is communicated with the pressure hydraulic fluid port of said second change-over valve 5, and the actuator port of said second change-over valve 5 is communicated with the control mouth of said power-transfer clutch 3, and the return opening of the return opening of said first change-over valve 4 and second change-over valve 5 is communicated with fuel tank respectively.
Through technique scheme, come control clutch 3 jointly through first change-over valve 4 and second change-over valve, 5 these two change-over valves.When hoisting mechanism need play lift operations; It is (as shown in Figure 1 that operating personal normally should make win change-over valve 4 and second change-over valve 5 all be in the position that actuator port is communicated with return opening; Make win change-over valve 4 and second change-over valve 5 all be in right position); Thereby make the control mouth of power-transfer clutch 3 of hoisting mechanism be communicated with and pressure release, so that power-transfer clutch 3 is in engagement state with fuel tank.And according to technique scheme provided by the invention; Through being set, two change-over valves have double shield; Even therefore operating personal has carried out maloperation to one of them change-over valve; Make this change-over valve be in the position that actuator port is communicated with the pressure hydraulic fluid port (for example making the change-over valve 4 of winning be in position, a left side by error) by error; But as long as another change-over valve is in correct position (promptly as long as second change-over valve 5 is in right position), the control mouth of power-transfer clutch 3 just can be communicated with and pressure release with fuel tank, and power-transfer clutch 3 still can correctly be in engagement state; And can not cause the generation of safety misadventure because of the maloperation of operating personal, thereby the reliability of the hydraulic control circuit of above-mentioned hoisting mechanism and working security are higher.
Preferably; As shown in Figure 1; Said hydraulic control circuit also comprises the 3rd change-over valve 6 on the pipeline that is serially connected between said first change-over valve 4 and second change-over valve 5; The pressure hydraulic fluid port of the 3rd change-over valve 6 is communicated with the actuator port of said first change-over valve 4, and the actuator port of said the 3rd change-over valve 6 is communicated with the pressure hydraulic fluid port of said second change-over valve 5, when said the 3rd change-over valve 6 is in primary importance (being illustrated in figure 1 as right position); The pressure hydraulic fluid port of the 3rd change-over valve 6 and actuator port conducting; When said the 3rd change-over valve 6 was in the second place (being illustrated in figure 1 as position, a left side), the pressure hydraulic fluid port of the 3rd change-over valve 6 and the unidirectional conducting of actuator port only allowed hydraulic oil to flow to the actuator port of the 3rd change-over valve 6 from the pressure hydraulic fluid port of the 3rd change-over valve 6.When hoisting mechanism need carry out freely transferring operation; It is (as shown in Figure 1 with the position that the pressure hydraulic fluid port is communicated with to make win change-over valve 4 and second change-over valve 5 all be in actuator port; Make win change-over valve 4 and second change-over valve 5 all be in position, a left side); Thereby make hoisting mechanism power-transfer clutch 3 control mouth and pressure-source communication and have pressure so that power-transfer clutch 3 is in disengaged condition.At this moment; Through making the 3rd change-over valve 6 be in the second place (being illustrated in figure 1 as position, a left side); Make the pressure hydraulic fluid port and the unidirectional conducting of actuator port of the 3rd change-over valve 6; Only allow hydraulic oil to flow to the actuator port of the 3rd change-over valve 6 from the pressure hydraulic fluid port of the 3rd change-over valve 6; Thereby the control mouth that can guarantee power-transfer clutch 3 effectively has pressure, prevents that closing power-transfer clutch 3 suddenly because of maloperation causes power-transfer clutch 3 and miscellaneous part to damage, and prevents that also the response pressure of power-transfer clutch 3 from causing power-transfer clutch 3 and miscellaneous part wearing and tearing inadequately.And when hoisting mechanism need play lift operations, make the 3rd change-over valve 6 be in primary importance (being illustrated in figure 1 as right position) and get final product, can not influence the pressure release of power-transfer clutch 3 control mouths.
More preferably, as shown in Figure 1, said hydraulic control circuit also comprises the energy storage 7 on the pipeline between the control mouth of other actuator port that is connected on said second change-over valve 5 and said power-transfer clutch 3.Energy storage 7 can play the pressurize effect; Thereby when hoisting mechanism carries out freely transferring operation; The control mouth that can further guarantee power-transfer clutch 3 has pressure; Prevent that closing power-transfer clutch 3 suddenly because of maloperation causes power-transfer clutch 3 and miscellaneous part to damage, prevent that also the response pressure of power-transfer clutch 3 from causing power-transfer clutch 3 and miscellaneous part wearing and tearing inadequately.
The pressure hydraulic fluid port and the pressure-source communication of first change-over valve 4; This pressure source can be any suitable pressure source (hydraulic tubing that for example has certain pressure) in the hydraulic efficiency pressure system; Preferably; As shown in Figure 1, said hydraulic control circuit also comprises first constant pressure source 17 that is communicated with the pressure hydraulic fluid port of said first change-over valve 4.Through first constant pressure source 17 is that the pressure hydraulic fluid port of first change-over valve 4 provides constant compression force, can be effectively for the control mouth of power-transfer clutch 3 provide constant control presssure, thus prevent the not enough situation of control presssure of power-transfer clutch 3.This first constant pressure source for example can be Hydraulic Pump independently, and can be on the oil feed line of this Hydraulic Pump other by pass valve that connects is that the pressure hydraulic fluid port of first change-over valve 4 provides constant compression force.
In the hydraulic control circuit of above-mentioned hoisting mechanism, can come modulated pressure motor 2 through various suitable hydraulic circuits.Preferably; As shown in Figure 1; Said hydraulic control circuit also comprises main valve 8, shuttle valve 9 and the 4th change-over valve 10, and two working oil path of said hoist motor 2 are communicated with two actuator ports of said main valve 8 respectively, and two inlets of said shuttle valve 9 are communicated with two working oil path of said hoist motor 2 respectively; The outlet of said shuttle valve 9 is communicated with the control mouth of said the 4th change-over valve 10, and the actuator port of said the 4th change-over valve 10 is communicated with the control mouth of said second change-over valve 5.Thereby;, needs hoist motor 2 rotates (no matter being that elevator hoists or elevator descends) when driving elevator reel 1; One of them working oil path of hoist motor 2 has pressure, thereby the pressure of this working oil path acts on the control mouth of the 4th change-over valve 10 through shuttle valve 9, thereby makes the pressure hydraulic fluid port of the 4th change-over valve 10 be communicated with actuator port; Pressure oil is flowed through the 4th change-over valve 10 and is affacted on the control mouth of second change-over valve 5; Thereby make second change-over valve 5 be in right position, so that the control mouth pressure release of power-transfer clutch 3 and make power-transfer clutch 3 be in engagement state, thereby can carry-over moment.
Preferably; As shown in Figure 1; Said hydraulic control circuit also comprises priority valve 11 and the 5th change-over valve 12; The pressure hydraulic fluid port of the 5th change-over valve 12 is communicated with the actuator port of said the 4th change-over valve 10, and the return opening of the 5th change-over valve 12 is communicated with the actuator port of said priority valve 11, and the actuator port of the 5th change-over valve 12 is communicated with the control mouth of said the 3rd change-over valve 6.When hoisting mechanism need carry out freely transferring; Main valve 8 is in meta; Thereby all do not have pressure on two working oil path of hoist motor 2, thereby do not have pressure on the control mouth of second change-over valve 5 and be in left side position, make power-transfer clutch 3 obtain pressure and be in disengaged condition.Make this moment the return opening of the 5th change-over valve 12 be communicated with (position, a left side that is in as shown in Figure 1) with actuator port; Thereby open priority valve 11 so that pressure oil acts on the control mouth of the 3rd change-over valve 6 through priority valve 11 and the 5th change-over valve 12; Thereby make the 3rd change-over valve 6 be in left side position and play the pressurize effect, be in disengaged condition to guarantee power-transfer clutch 3.
Preferably, as shown in Figure 1, also be provided with first normally closed brake 13 on the said elevator reel 1, the actuator port of said the 5th change-over valve 12 also is communicated with the control mouth of said first normally closed brake 13.Thereby when hoisting mechanism need carry out freely transferring; The hydraulic oil that flows out from the actuator port of the 5th change-over valve 12 also acts on the control mouth of first normally closed brake 13; Thereby the normally closed brake 13 of winning is opened, made elevator reel 1 freely to rotate.
More preferably; As shown in Figure 1; Said hydraulic control circuit also comprises one-way throttle valve 14, and this one-way throttle valve 14 is serially connected on the pipeline between the control mouth of control mouth and said the 3rd change-over valve 6 of actuator port and said first normally closed brake 13 of said the 5th change-over valve 12.This one-way throttle valve 14 plays the effect that changes down the pass soon; Thereby can to the control mouth of first normally closed brake 13 and the control mouth of said the 3rd change-over valve 6 hydraulic oil be provided apace; To avoid the generation of delay phenomenon as much as possible; And can make the control mouth pressure release lentamente of the control mouth and said the 3rd change-over valve 6 of the normally closed brake 13 of winning through the throttling action of one-way throttle valve 14, hydraulic efficiency pressure system impacted avoiding.
Preferably, as shown in Figure 1, also be provided with second normally closed brake 15 on the said retarder, the actuator port of said the 4th change-over valve 10 also is communicated with the control mouth of said second normally closed brake 15.Thereby; When hoisting mechanism need carry out that elevator hoists or during the elevator step-down operation; The hydraulic oil that the actuator port of the 4th change-over valve 10 flows out also acts on the control mouth of second normally closed brake 15, so that second normally closed brake 15 opens, thereby retarder can freely rotate.
Preferably; As shown in Figure 1; Said hydraulic control circuit comprises that also the 6th change-over valve 16, the six change-over valves 16 are serially connected on the pipeline between the control mouth of control mouth and said second change-over valve 5 of actuator port and said second normally closed brake 15 of said the 4th change-over valve 10.Thereby can cut off or conducting through the oil circuit that the 6th change-over valve 16 is controlled between the control mouth of control mouth and said second change-over valve 5 of actuator port and said second normally closed brake 15 of the 4th change-over valve 10; More specifically; The 6th change-over valve 16 as shown in Figure 1 is the two-position three way solenoid directional control valve; When the electromagnet of the 6th change-over valve 16 gets when electric; Oil circuit between the control mouth of the control mouth of the actuator port of the 4th change-over valve 10 and said second normally closed brake 15 and said second change-over valve 5 cuts off, the pressure oil pressure release of the control mouth of the control mouth of second normally closed brake 15 and said second change-over valve 5; When the electromagnet dead electricity of the 6th change-over valve 16; Oil circuit conducting between the control mouth of the control mouth of the actuator port of the 4th change-over valve 10 and said second normally closed brake 15 and said second change-over valve 5; The hydraulic oil of the actuator port of the 4th change-over valve 10 can flow to the control mouth of second normally closed brake 15 and the control mouth of said second change-over valve 5, and makes the control mouth of second normally closed brake 15 and the control mouth of said second change-over valve 5 have pressure.
The pressure hydraulic fluid port and the pressure-source communication of the 4th change-over valve 10 and priority valve 11; This pressure source can be any suitable pressure source (hydraulic tubing that for example has certain pressure) in the hydraulic efficiency pressure system; Preferably; As shown in Figure 1, said hydraulic control circuit also comprises second constant pressure source 19, and this second constant pressure source 19 is communicated with the pressure hydraulic fluid port of said the 4th change-over valve 10 and the pressure hydraulic fluid port of said priority valve 11.
Through second constant pressure source 19 is that the pressure hydraulic fluid port of the 4th change-over valve 10 and the pressure hydraulic fluid port of priority valve 11 provide constant compression force, can be that the pressure hydraulic fluid port of the 4th change-over valve 10 and the pressure hydraulic fluid port of priority valve 11 provide constant control presssure effectively.This first constant pressure source for example can be Hydraulic Pump independently, can be on the oil feed line of this Hydraulic Pump otherly connects by pass valve and comes for constant compression force is provided.
Said priority valve 11 can be various suitable valve version, for example can be foot-operated proportional pilot valve, and when this priority valve 11 was in initial condition, valve port was closed, and when stepping on the pedal of this priority valve, valve port opening is according to pedal stroke and ratio control.
As shown in Figure 1; First change-over valve 4 is the two-position three way solenoid directional control valve, and second change-over valve 5 is the two-position three way pilot operated directional control valve, and the 3rd change-over valve 6 is the two-position two-way hydraulic control change-over valve; The 4th change-over valve 10 is the two-position three way pilot operated directional control valve; The 5th change-over valve 12 is the two-position three way solenoid directional control valve, and the 6th change-over valve 16 is the bi-bit bi-pass solenoid directional control valve, but above-mentioned six change-over valves also can be the change-over valve of other types and mode.
In Fig. 1,20 is controllable capacity pump, for hoist motor 2 hydraulic oil is provided through main valve 8.21 is filter, and 22 is balance cock, and 23 and 24 are respectively by pass valve, and 25 is weight, and 26 is pulley.
Specify the working process of the specific embodiment as shown in Figure 1 below.
In hoisting mechanism lift heavy thing hoists process; At first handle bar handle 18 by operating personal; Make main valve 8 obtain pilot pressures and produce switching-over and be positioned at position, a left side, the pressure oil of discharging from controllable capacity pump 20 acts on the lifting side of hoist motor 2 through the check valve of main valve 8 and balance cock 22, and pressure oil promotes the 4th change-over valve 10 through shuttle valve 9 and makes its switching-over simultaneously; Hydraulic oil from second constant pressure source 19 is opened second normally closed brake 15 through the 4th change-over valve 10; The braking of releasing normally closed, and promote 5 switching-overs of second change-over valve, make power-transfer clutch 3 pressure releases; Guarantee that power-transfer clutch 3 is in engagement state, avoid taking place because of maloperation causes power-transfer clutch 3 to throw off the unsafe condition that causes the weight free fall.Meanwhile, open sequence number first normally closed brake 13 through the 5th change-over valve 12 with one-way throttle valve 14, remove the normally closed braking, action thereby the completion elevator hoists from the hydraulic oil of second constant pressure source 17.
In the process that hoisting mechanism is freely transferred; At first through make first change-over valve 4, the 5th change-over valve 12 and the 6th change-over valve 16 simultaneously electric switching-over (for example realizing) through opening the control cabin switch; At this moment; Give energy storage 7 pressurisings from the hydraulic oil of first constant pressure source 17 through first change-over valve 4, the 3rd change-over valve 6 and second change-over valve 5; And make power-transfer clutch 3 be in disengaged condition, and elevator reel 1 and retarder are thrown off, elevator reel 1 is in the static state of braking under the effect of first normally closed brake 13.When stepping on priority valve 11, open first normally closed brake 13 through the 5th change-over valve 12 with one-way throttle valve 14 from the hydraulic oil of second constant pressure source 19, elevator reel 1 realizes freely transferring action under the weight effect.Meanwhile; The hydraulic oil that flows out from one-way throttle valve 14 promotes the 3rd change-over valve 6; Make power-transfer clutch 3 under the effect of energy storage 7, be in packing state; Thereby guaranteed first normally closed brake 13 exist pressure not glancing impact power-transfer clutch 3 be in disengaged condition, avoid causing because of maloperation causes power-transfer clutch 3 to engage when the 1 high speed free fall of elevator reel this moment safety misadventure and the badly damaged situation of main frame taken place.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned embodiment; In technical conceive scope of the present invention, can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (13)
1. the hydraulic control circuit of a hoisting mechanism; This hoisting mechanism comprises elevator reel (1), retarder and hoist motor (2); The input end of said elevator reel (1) and the mouth of said retarder are connected through power-transfer clutch (3); The input end of said retarder is connected with the mouth of said hoist motor (2); It is characterized in that said hydraulic control circuit comprises first change-over valve (4) and second change-over valve (5), the actuator port of said first change-over valve (4) is communicated with the pressure hydraulic fluid port of said second change-over valve (5); The actuator port of said second change-over valve (5) is communicated with the control mouth of said power-transfer clutch (3), and the return opening of the return opening of said first change-over valve (4) and second change-over valve (5) is communicated with fuel tank respectively.
2. the hydraulic control circuit of hoisting mechanism according to claim 1; It is characterized in that; Said hydraulic control circuit also comprises the 3rd change-over valve (6) on the pipeline that is serially connected between said first change-over valve (4) and second change-over valve (5); The pressure hydraulic fluid port of the 3rd change-over valve (6) is communicated with the actuator port of said first change-over valve (4), and the actuator port of said the 3rd change-over valve (6) is communicated with the pressure hydraulic fluid port of said second change-over valve (5), when said the 3rd change-over valve (6) when being in primary importance; The pressure hydraulic fluid port of the 3rd change-over valve (6) and actuator port conducting; When said the 3rd change-over valve (6) when being in the second place, the pressure hydraulic fluid port of the 3rd change-over valve (6) and the unidirectional conducting of actuator port only allow hydraulic oil to flow to the actuator port of the 3rd change-over valve (6) from the pressure hydraulic fluid port of the 3rd change-over valve (6).
3. the hydraulic control circuit of hoisting mechanism according to claim 2 is characterized in that, said hydraulic control circuit also comprises the energy storage (7) on the pipeline between the control mouth of other actuator port that is connected on said second change-over valve (5) and said power-transfer clutch (3).
4. the hydraulic control circuit of hoisting mechanism according to claim 1 is characterized in that, said hydraulic control circuit also comprises first constant pressure source (17) that is communicated with the pressure hydraulic fluid port of said first change-over valve (4).
5. according to the hydraulic control circuit of any described hoisting mechanism in the claim 2 to 4; It is characterized in that; Said hydraulic control circuit also comprises main valve (8), shuttle valve (9) and the 4th change-over valve (10); Two working oil path of said hoist motor (2) are communicated with two actuator ports of said main valve (8) respectively; Two inlets of said shuttle valve (9) are communicated with two working oil path of said hoist motor (2) respectively, and the outlet of said shuttle valve (9) is communicated with the control mouth of said the 4th change-over valve (10), and the actuator port of said the 4th change-over valve (10) is communicated with the control mouth of said second change-over valve (5).
6. the hydraulic control circuit of hoisting mechanism according to claim 5; It is characterized in that; Said hydraulic control circuit also comprises priority valve (11) and the 5th change-over valve (12); The pressure hydraulic fluid port of the 5th change-over valve (12) is communicated with the actuator port of said the 4th change-over valve (10), and the return opening of the 5th change-over valve (12) is communicated with the actuator port of said priority valve (11), and the actuator port of the 5th change-over valve (12) is communicated with the control mouth of said the 3rd change-over valve (6).
7. the hydraulic control circuit of hoisting mechanism according to claim 6; It is characterized in that; Also be provided with first normally closed brake (13) on the said elevator reel (1), the actuator port of said the 5th change-over valve (12) also is communicated with the control mouth of said first normally closed brake (13).
8. the hydraulic control circuit of hoisting mechanism according to claim 7; It is characterized in that; Said hydraulic control circuit also comprises one-way throttle valve (14), and this one-way throttle valve (14) is serially connected on the pipeline between the control mouth of control mouth and said the 3rd change-over valve (6) of actuator port and said first normally closed brake (13) of said the 5th change-over valve (12).
9. the hydraulic control circuit of hoisting mechanism according to claim 6; It is characterized in that; Also be provided with second normally closed brake (15) on the said retarder, the actuator port of said the 4th change-over valve (10) also is communicated with the control mouth of said second normally closed brake (15).
10. the hydraulic control circuit of hoisting mechanism according to claim 9; It is characterized in that; Said hydraulic control circuit also comprises the 6th change-over valve (16), and the 6th change-over valve (16) is serially connected on the pipeline between the control mouth of control mouth and said second change-over valve (5) of actuator port and said second normally closed brake (15) of said the 4th change-over valve (10).
11. the hydraulic control circuit of hoisting mechanism according to claim 6; It is characterized in that; Said hydraulic control circuit also comprises second constant pressure source (19), and this second constant pressure source (19) is communicated with the pressure hydraulic fluid port of said the 4th change-over valve (10) and the pressure hydraulic fluid port of said priority valve (11).
12. the hydraulic control circuit of hoisting mechanism according to claim 6 is characterized in that, the foot-operated proportional pilot valve of said priority valve (11).
13. the hydraulic control circuit of hoisting mechanism according to claim 5 is characterized in that, said hydraulic control circuit also comprises the bar handle (18) that is communicated with the control mouth of said main valve (8).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210088315 CN102616694A (en) | 2012-03-29 | 2012-03-29 | Hydraulic control loop of winding mechanism |
| CN201310073001.4A CN103145057B (en) | 2012-03-29 | 2013-03-07 | Hydraulic control loop of hoisting mechanism |
| CN201310073029.8A CN103112793B (en) | 2012-03-29 | 2013-03-07 | Hydraulic control circuit of winding mechanism |
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| CN 201210088315 CN102616694A (en) | 2012-03-29 | 2012-03-29 | Hydraulic control loop of winding mechanism |
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| CN102616694A true CN102616694A (en) | 2012-08-01 |
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| CN201310073029.8A Active CN103112793B (en) | 2012-03-29 | 2013-03-07 | Hydraulic control circuit of winding mechanism |
| CN201310073001.4A Active CN103145057B (en) | 2012-03-29 | 2013-03-07 | Hydraulic control loop of hoisting mechanism |
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| CN201310073029.8A Active CN103112793B (en) | 2012-03-29 | 2013-03-07 | Hydraulic control circuit of winding mechanism |
| CN201310073001.4A Active CN103145057B (en) | 2012-03-29 | 2013-03-07 | Hydraulic control loop of hoisting mechanism |
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| JPS62200004A (en) * | 1986-02-26 | 1987-09-03 | Yutani Juko Kk | Control circuit of hydraulic motor for driving rotating structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103112793B (en) | 2015-03-25 |
| CN103112793A (en) | 2013-05-22 |
| CN103145057B (en) | 2015-01-21 |
| CN103145057A (en) | 2013-06-12 |
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