CN202988618U - Closed hydraulic circuit for controlling cantilever crane to rotate, and crane - Google Patents
Closed hydraulic circuit for controlling cantilever crane to rotate, and crane Download PDFInfo
- Publication number
- CN202988618U CN202988618U CN 201220681082 CN201220681082U CN202988618U CN 202988618 U CN202988618 U CN 202988618U CN 201220681082 CN201220681082 CN 201220681082 CN 201220681082 U CN201220681082 U CN 201220681082U CN 202988618 U CN202988618 U CN 202988618U
- Authority
- CN
- China
- Prior art keywords
- valve
- hydraulic motor
- loop
- hydraulic
- pressure side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a closed hydraulic circuit for controlling a cantilever crane to rotate. The closed hydraulic circuit comprises a hydraulic motor for driving the cantilever crane to rotate, and a bidirectional hydraulic pump communicated with the hydraulic motor, wherein the closed hydraulic circuit comprises a high pressure side and a low pressure side on both sides of the hydraulic motor, and a speed regulating circuit controlled by a switch valve is arranged between the high pressure side and the lower pressure side and is provided with a speed regulating valve. When the switch valve is opened, pressure oil on the high pressure side flows into the speed regulating circuit and then flows back to the low pressure side after being regulated by the speed regulating valve. The utility model further discloses a crane with the closed hydraulic circuit. As the pressure oil on the high pressure side of the hydraulic motor can flow into the speed regulating circuit during free sliding work and flows back to the low pressure side after being regulated by the speed regulating valve, the rotating speed can be controlled by the speed regulating valve in the speed regulating circuit, so that the rotation reliability of the cantilever crane is high, and the safety and practicality of the crane are further improved.
Description
Technical field
The utility model relates to controls the rotating Hydraulic Field of jib, particularly, relates to a kind of hoisting crane of controlling the rotating closed hydraulic loop of jib and using this closed hydraulic loop.
Background technology
In jib revolution field, particularly in the crane arm revolution field of hoisting crane, usually use closed hydraulic loop to control the revolution of jib, and this closed hydraulic loop can make jib utilize free gravity to trackslip when the lifting of lifting operation.The effect of this free rotary is very important, can make the center of gravity of suspension hook center of gravity and jib on same cross section, avoids hoisting crane to be subject to the effect of oblique pulling in hoisting heavy and causes jib the problem that side sway etc. is damaged hoisting crane to occur.
At present, closed hydraulic loop of the prior art provides pressure oil by controllable capacity pump for HM Hydraulic Motor, and can make between HM Hydraulic Motor two actuator ports by switch valve and be communicated with, and namely after switch valve is opened, can realize the free rotary function of jib.Particularly, be connected to by hydraulic tubing between two actuator ports of HM Hydraulic Motor, switch valve and damping are set on this hydraulic tubing.When needs carried out the free rotary operation, switch valve was opened, and two hydraulic fluid ports of HM Hydraulic Motor are communicated with by damping, and namely on high-tension side pressure oil can be by flowing into low pressure side after damping, thereby realize the free rotary of jib.
Yet, although existing Hydraulic slewing system can realize the function of free rotary, but owing to directly being communicated with between the actuator port of motor both sides, although the existence of damping is arranged, do not have other to take any measure, cause free rotary process medium velocity to be difficult to control, especially in the situation that motor both sides hydraulic fluid port pressure reduction is larger, free rotary speed is very fast, and this is for the safe in operation of hoisting crane, abnormally dangerous, easily cause Peril Incident to occur.And because the characteristic of damping is altered a great deal by the impact of oil temperature, and the pressure reduction of motor operations hydraulic fluid port both sides is added in one fixedly in damping, makes external temperature and operating mode produce a very large impact the controllable degree of free rotary.
The utility model content
A purpose of the present utility model is to provide the rotating closed hydraulic loop of a kind of control jib, and this closed hydraulic loop can make when carrying out the jib free rotary, and speed of revolutions is controlled, and reliability is high.
Another purpose of the present utility model is to provide a kind of hoisting crane, and the closed hydraulic loop that this hoisting crane use the utility model provides is controlled the revolution of crane arm.
to achieve these goals, according to a purpose of the present utility model, provide a kind of control jib rotating closed hydraulic loop, comprise be used to the bidirectional hydraulic pump that drives the rotating HM Hydraulic Motor of described jib and be communicated with this HM Hydraulic Motor, described closed hydraulic loop comprises high pressure side and the low pressure side that is positioned at described HM Hydraulic Motor both sides, and be provided with the speed control loop of being controlled by switch valve between described high pressure side and low pressure side, be provided with governor valve on this speed control loop, after described switch valve is opened, described on high-tension side pressure oil flows in described speed control loop, and flowing back to described low pressure side through after the speed governing of described governor valve.
Preferably, described speed control loop also comprises high-pressure induct device and unidirectional recycling device, one end of the close described governor valve input direction of described speed control loop is connected to the both sides of described HM Hydraulic Motor by described high-pressure induct device, to guide the described on high-tension side pressure oil in described HM Hydraulic Motor into described governor valve; One end of the outbound course of the close described governor valve of described speed control loop is connected to the both sides of described HM Hydraulic Motor by described unidirectional recycling device, flow back to described low pressure side in described HM Hydraulic Motor both sides to make by the single direction that described unidirectional recycling device was allowed through the pressure oil after described governor valve speed governing.
Preferably, described high-pressure induct device is shuttle valve, two input ends of this shuttle valve are connected to described HM Hydraulic Motor both sides, after described switch valve is opened, described shuttle valve can be with described on high-tension side pressure oil from the mouth output of described shuttle valve and can flow into described governor valve.
Preferably, described switch valve is arranged between the input end of the mouth of described shuttle valve and described governor valve.
Preferably, described unidirectional recycling device comprises the first one-way overflow valve and the second one-way overflow valve that setting pressure is identical, this first one-way overflow valve and the second one-way overflow valve are communicated with the both sides of described HM Hydraulic Motor respectively, so that selectively enter described low pressure side by the first one-way overflow valve and the second one-way overflow valve through the described pressure oil after speed governing.
Preferably, described closed hydraulic loop comprises can be the feed circuit of described closed hydraulic loop repairing, and this feed circuit is connected to described HM Hydraulic Motor both sides, and described unidirectional recycling device is arranged in this described feed circuit.。
Preferably, described feed circuit comprises slippage pump, the first one-way overflow valve and the second one-way overflow valve, wherein, described the first one-way overflow valve and the second one-way overflow valve be described unidirectional recycling device and be communicated with the both sides of described HM Hydraulic Motor respectively and setting pressure identical, the fuel-displaced side of described slippage pump accesses between described the first one-way overflow valve and the second one-way overflow valve by access point, and the intake side of described slippage pump is communicated with fuel tank.
Preferably, described feed circuit comprises oil filter and three by pass valve in parallel with this oil filter, described this oil filter is connected between described governor valve and described unidirectional circuit device, and described feed circuit comprises the 4th by pass valve, between the oil inlet described oil filter of access and described access point of the 4th by pass valve.
Preferably, described bidirectional hydraulic pump comprises heat-radiation loop, this heat-radiation loop comprises the radiator that is communicated with fuel tank and the check valve in parallel with this radiator, described check valve allows fluid to flow back to described fuel tank, described HM Hydraulic Motor is two and is arranged in parallel, each described HM Hydraulic Motor all is equipped with flush valve, and this flush valve can be transmitted back to described fuel tank by described heat-radiation loop with heat and the impurity of described HM Hydraulic Motor.
According on the other hand of the present utility model, a kind of hoisting crane is provided, this hoisting crane comprises crane arm, and described hoisting crane comprises the rotating closed hydraulic loop of control jib that the utility model provides, and described jib is described crane arm.
Pass through technique scheme, the closed hydraulic loop that provides due to the utility model comprises the speed control loop of being controlled by switch valve, this speed control loop comprises governor valve, and when carrying out the free rotary operation, the on high-tension side pressure oil of HM Hydraulic Motor can flow in speed control loop, and flowing back to low pressure side through after the speed governing of governor valve, therefore can realize control to speed of revolutions by governor valve in this speed control loop, make the rotating controllability of jib, reliability high, further promoted safety and the practicality of hoisting crane.
Other feature and advantage of the present utility model will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and consists of the part of specification sheets, is used from explanation the utility model with the following specific embodiment one, but does not consist of restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the closed hydraulic loop that provides of the utility model preferred implementation.
Description of reference numerals
1 HM Hydraulic Motor 2 bidirectional hydraulic pumps
3 switch valve 4 governor valves
5 shuttle valve 6 fuel tanks
A speed control loop b feed circuit
C access point d heat-radiation loop
3b the second one-way overflow valve 4b oil filter
5b the 3rd by pass valve 6b the 4th by pass valve
7b the 5th by pass valve 1d radiator
11 flush valves of 2d check valve
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
In the utility model, as shown in Figure 1, provide a kind of control jib rotating closed hydraulic loop, 1, the rotating closed hydraulic loop of a kind of control jib, comprise for the bidirectional hydraulic pump 2 that drives the rotating HM Hydraulic Motor 1 of jib and be communicated with this HM Hydraulic Motor 1, think that this HM Hydraulic Motor 1 provides pressure oil, wherein bidirectional hydraulic pump 2 can be preferably controllable capacity pump, and the number of HM Hydraulic Motor 1 can for one also can be for parallel with one another a plurality of, in preferred implementation of the present utility model, HM Hydraulic Motor 1 is two and parallel with one another.In this closed hydraulic loop, pressure oil can be recycled, therefore consider that the heating of fluid and the leakage of bidirectional hydraulic pump and HM Hydraulic Motor also preferably arrange feed circuit b, heat-radiation loop d, flush valve 11, radiator 1d etc. on this closed hydraulic loop, also in time take away with the leakage in the compensation hydraulic circuit heat that produces in the loop.
as shown in Figure 1, the closed hydraulic loop that the utility model provides comprises high pressure side and the low pressure side that is positioned at HM Hydraulic Motor 1 both sides, namely, when needs carry out the free rotary of jib, no matter the HM Hydraulic Motor forward is still reversed, the inevitable side in its both sides is the high pressure side, one side is low pressure side, carry out in the process of free rotary at jib this moment, need the on high-tension side pressure oil of HM Hydraulic Motor 1 is compensated to low pressure side, in order to realize the purpose of this utility model, namely realize the controllability of jib free rotary, in the closed hydraulic loop that the utility model provides, be provided with the speed control loop a that is controlled by switch valve 3 between high pressure side and low pressure side, be provided with governor valve 4 on this speed control loop a, after switch valve 3 is opened, on high-tension side pressure oil flows in speed control loop a, and flow back to low pressure side through after the speed governing of governor valve 4.
Wherein switch valve 3 can be the valve member of realizing arbitrarily switching function in this area; in preferred implementation of the present utility model; this switch valve 3 is for having the bi-bit bi-pass solenoid directional control valve of two-way locking function; when this switch valve 3 can open speed control loop a to carry out the free rotary operation of above-mentioned jib after electric, can close speed control loop a after dead electricity to carry out the normal revolution operation of jib.Switch valve for other kinds also should drop in protection domain of the present utility model equally.
Therefore, owing to being provided with governor valve 4 in speed control loop a, can make from the flow of the pressure oil of the high side to low side of HM Hydraulic Motor 1 compensation adjustable, namely realize the controlled of HM Hydraulic Motor 1 rotative speed, thereby make in the free rotary operation, jib can be completed revolution safely, reliably, the greatly lower too fast accident rate that causes of speed of revolutions that occurs.
Wherein, the upper governor valve that arranges 4 of speed control loop a is for having the flow-controlling gate of pressure compensation effect, particularly, can be integrated by flow regulating valve and uniform-pressure-drop valve, certainly use independent flow regulating valve to be connected the speed governing purpose that also can realize in the utility model with uniform-pressure-drop valve.Wherein, uniform-pressure-drop valve can be fixed the inlet outlet pressure differential of flow regulating valve, therefore the flow of the pressure oil in speed control loop a is only relevant to the valve port opening of governor valve 4, more preferably, this governor valve 4 is electromagnetic proportional valve, therefore can by control to the control electric current of electromagnet big or small more convenient, realize speed governing to the pressure oil in speed control loop a exactly.Certainly, the mode of speed control in above-mentioned optimal way, the structure of other speed control loops relatively, all should drop in protection domain of the present utility model the speed governing of pressure oil as long as can realize for those skilled in the art.
Need to prove that the embodiment that can complete technique scheme has multiple, such as the structure of speed control loop and mode etc., the utility model for convenience of description, introduce by reference to the accompanying drawings wherein preferred implementation at this, this preferred implementation only is used for explanation the utility model and is not limited to this utility model.
Further, consider the difference that HM Hydraulic Motor rotates and reverse, can cause low pressure side and the on high-tension side diverse location that is positioned at the HM Hydraulic Motor both sides of generation, and due to the direction requirement that is arranged on governor valve 4 on speed control loop a and has the fluid input and output, if only governor valve is connected between the both sides of HM Hydraulic Motor, in the time of can causing therein a kind of state, on high-tension side pressure oil enters speed control loop from the outbound course of governor valve 4, and can't obtain the normal speed governing of governor valve 4.At this moment, this closed fhdraulic system can be used with only in the jib revolution control operating mode of a direction rotation.Certainly, if realize both direction, situation about namely rotating and reverse all can realize using governor valve to carry out speed governing.Need to further optimize the technical scheme that the utility model provides.
Wherein, the below will introduce preferred implementation wherein, namely realize the speed governing of HM Hydraulic Motor 1 under two kinds of operating modes that rotate and reverse by a speed control loop a.Certainly, except in following the utility model preferred implementation, in other NM embodiments, can also be set to two in parallel by the speed control loop a that directly is connected to HM Hydraulic Motor 1 both sides, governor valve 4 is wherein installed in opposite mode, can be by the forward counter-rotating requirement of HM Hydraulic Motor 1, the switch valve 3 of correspondingly opening on speed control loop a can be realized the speed governing of HM Hydraulic Motor 1 on both direction equally.For this mode, should drop in protection domain of the present utility model equally.
Get back in the preferred technical scheme of the utility model, namely realize the speed governing of HM Hydraulic Motor on both direction by a speed control loop a.As shown in Figure 1, speed control loop a also comprises high-pressure induct device (shuttle valve 5 in Fig. 1) and unidirectional recycling device (first, second one- way overflow valve 2b, 3b in Fig. 1), wherein, the end of close governor valve 4 input directions of speed control loop a is connected to the both sides of HM Hydraulic Motor 1 by the high-pressure induct device, to guide the on high-tension side pressure oil in HM Hydraulic Motor 1 into governor valve 4; The end of the outbound course of the close governor valve 4 of speed control loop a is connected to the both sides of HM Hydraulic Motor 1 by unidirectional recycling device, flow back to low pressure side in HM Hydraulic Motor 1 both sides to make by the single direction that unidirectional recycling device was allowed through the pressure oil after governor valve 4 speed governing.Characteristic of unidirectional due to unidirectional recycling device, can prevent in the free rotating process of jib, on high-tension side pressure oil flows into speed control loop a from the direction near governor valve 3 outputs, and due to the flow characteristic of pressure oil, can make by the pressure oil of speed governing and flow back in the low pressure side of HM Hydraulic Motor 1 both sides by unidirectional recycling device.
and owing to being provided with the pressure selection device on speed control loop a, by this pressure selection device, can always make on high-tension side pressure oil can flow in speed control loop a, and can be through the speed governing of governor valve 4, namely, can guarantee that on high-tension side pressure oil flows into speed control loop a from the input direction of governor valve 4, therefore, in the process of jib free rotary, no matter HM Hydraulic Motor 1 is forward state or inverted status, all can realize on high-tension side pressure oil is carried out flowing back into low pressure side after speed governing by speed control loop, thereby the speed of revolutions of realizing HM Hydraulic Motor is controlled.
Particularly, in preferred implementation as shown in Figure 1, for the pressure oil in the high pressure side is introduced in speed control loop a, as a kind of preference, described pressure selection device is the shuttle valve 5 with pressure selection function, and be connected to by this shuttle valve 5 between the high pressure side and low pressure side of HM Hydraulic Motor 1, particularly, two input ends of this shuttle valve are connected between high pressure side and low pressure side, after switch valve 3 is opened, pressure oil can flow into governor valve 4 from the mouth of shuttle valve 5, and is flowing back to low pressure side through after the speed governing of this governor valve 4.Wherein, in order to guarantee the stable operation of governor valve 4, preferably, switch valve 3 is arranged between the input end of the mouth of shuttle valve 5 and governor valve 4.Therefore, only after switch valve 3 was opened, pressure oil could affect governor valve 4, thereby had guaranteed working stability and the service life of governor valve 4.Therefore; by being set on speed control loop a, shuttle valve 5 can select during on high-tension side pressure oil enters speed control loop; no matter thereby HM Hydraulic Motor forward or reverse; all can realize the purpose of this utility model by the governor valve that is arranged on speed control loop a; certainly; except this shuttle valve 5, can also use two check valves of relatively installing to realize drawing of high side pressure oil, also should drop in protection domain of the present utility model for this type of change.
And preferably, after the speed governing of governor valve 4 of pressure oil process, need to flow back in closed hydraulic loop to compensate to the low pressure side of HM Hydraulic Motor, described unidirectional recycling device comprises the first one-way overflow valve 2b and the second one-way overflow valve 3b, this the first one-way overflow valve 2b and the second one-way overflow valve 3b are communicated with the both sides of HM Hydraulic Motor 1 respectively, selectively enter described low pressure side by the first one-way overflow valve 2b and the second one-way overflow valve 3b through the pressure oil after speed governing.Wherein, the first one-way overflow valve 2b is identical with the setting pressure of the second one-way overflow valve 3b, make the pressure oil can be in the situation that during pressure stability flows back to low pressure side by selection smoothly, then complete in the free rotary operation, the high side pressure oil of HM Hydraulic Motor 1 flows back to low pressure side through after speed governing, thus the controlled free rotary operation of the speed that realizes.In addition, owing to adopting one-way overflow valve, can avoid on high-tension side pressure oil to flow into feed circuit from the outbound course of governor valve.In addition, in other NM embodiments, can also only adopt two to set identical two one-way overflow valves of check valve replacement of back pressure, can either realize that the pressure oil after speed governing flows to low pressure side equally like this, can prevent that again on high-tension side pressure oil from flowing into feed circuit a from this end.Should drop in protection domain of the present utility model equally for this distortion.
In addition as shown in Figure 1, as a kind of preferred embodiment, in order to make the designs simplification of closed hydraulic loop, the speed control loop a that the utility model provides can utilize feed circuit b to take back the both sides of HM Hydraulic Motor.Feed circuit b can replenish the fluid that loses because of reasons such as leakages for closed hydraulic loop.Wherein preferably, the unidirectional recycling device in speed control loop a (the first one-way overflow valve 2b and the second one-way overflow valve 3b) can be arranged in this feed circuit b.Be about to this unidirectional circuit device as the parts that are used in feed circuit b to HM Hydraulic Motor both sides repairing, make in the closed hydraulic loop that the utility model provides more succinctly, and take full advantage of fluid in closed hydraulic loop.Wherein, this feed circuit b can be the feed circuit that is applied to arbitrarily closed hydraulic loop common in this area.Wherein, in the utility model, feed circuit b comprises slippage pump 1b, the first one-way overflow valve 2b and the second one-way overflow valve 3b, wherein, the first one-way overflow valve 2b and the second one-way overflow valve 2c are the unidirectional circuit device in speed control loop a, and the both sides with HM Hydraulic Motor 1 are connected respectively, the fuel-displaced side of slippage pump 1b is by between access point c access the first one-way overflow valve 2b and the second one-way overflow valve 3b, intake side is communicated with fuel tank 6, the closed hydraulic loop repairing that therefore, can in time provide for the utility model by this feed circuit b.Slippage pump 1b wherein is preferably with bidirectional hydraulic pump 2 and adopts the same power source to drive, and the hydraulic loop structure that makes the utility model provide is compacter succinct.
In addition, comprise oil filter 4b and the three by pass valve 5b in parallel with this oil filter 4b at feed circuit b, and this oil filter 4b connects between the governor valve 4 and described unidirectional circuit device of speed control loop a, thereby flows back to low pressure side after making the pressure oil of introducing in speed control loop a can selectively be cleaned equally again.Particularly at work, the setting pressure of the 3rd by pass valve 5b is very little, when not needing to use oil filter 4b, opens the 3rd by pass valve 5b and gets final product.In addition, feed circuit b also comprises the 4th by pass valve 6b that is communicated with fuel tank, between the oil inlet access oil filter 4b and access point c of the 4th by pass valve 6b.Therefore, by the setting pressure of the 4th by pass valve 6b rationally is set, can rationally adjust the pressure size of speed control loop a, and guarantee the safety of this speed control loop a.In addition, slippage pump 1b is upper goes back and is connected to the 5th by pass valve 7b, with the use as the safety valve of feed circuit.It will be appreciated that, the preferred structure that above-described structure only provides for the utility model, those skilled in the art can make various changes and replacement to it, all should drop in protection domain of the present utility model for this type of change and replacement.
Except feed circuit, the closed hydraulic loop that the utility model provides also comprises heat-radiation loop d, this heat-radiation loop d comprises the radiator 1d that is communicated with fuel tank 6 and the check valve 2d in parallel with this radiator 1d, check valve 2d allows fluid to flow back to fuel tank 6, and each HM Hydraulic Motor all is equipped with flush valve 11, and this flush valve 11 can be transmitted back to fuel tank 6 by heat-radiation loop with heat and the impurity of HM Hydraulic Motor 1.Wherein, radiator and flush valve etc. is parts common in this area, does not do too much at this and gives unnecessary details.
To sum up, the rotating closed hydraulic loop of control jib that the utility model preferred implementation provides is introduced the on high-tension side pressure oil of HM Hydraulic Motor in speed control loop a by shuttle valve, and carry out speed governing by governor valve 4, then return the low pressure side of HM Hydraulic Motor by the Unidirectional relief valve compensation, thereby can be in the situation that the controlled free rotary operation of completing jib of speed of revolutions be safe and reliable.Therefore the utility model also provides a kind of hoisting crane, and this hoisting crane comprises crane arm, and uses closed hydraulic loop that the utility model provides to control the revolution of jib.Then make closed hydraulic loop and the hoisting crane that the utility model provides all have higher practicality and promotional value.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Need to prove in addition, each concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. rotating closed hydraulic loop of control jib, comprise be used to the bidirectional hydraulic pump (2) that drives the rotating HM Hydraulic Motor of described jib (1) and be communicated with this HM Hydraulic Motor (1), it is characterized in that, described closed hydraulic loop comprises high pressure side and the low pressure side that is positioned at described HM Hydraulic Motor (1) both sides, and be provided with the speed control loop (a) of being controlled by switch valve (3) between described high pressure side and low pressure side, be provided with governor valve (4) on this speed control loop (a), after described switch valve (3) is opened, described on high-tension side pressure oil flows in described speed control loop (a), and flow back to described low pressure side after the speed governing through described governor valve (4).
2. closed hydraulic loop according to claim 1, it is characterized in that, described speed control loop (a) also comprises high-pressure induct device and unidirectional recycling device, one end of close described governor valve (4) input direction of described speed control loop (a) is connected to the both sides of described HM Hydraulic Motor (1) by described high-pressure induct device, to guide the described on high-tension side pressure oil in described HM Hydraulic Motor (1) into described governor valve (4); One end of the outbound course of the close described governor valve (4) of described speed control loop (a) is connected to the both sides of described HM Hydraulic Motor (1) by described unidirectional recycling device, flow back to described low pressure side in described HM Hydraulic Motor (1) both sides to make by the single direction that described unidirectional recycling device was allowed through the pressure oil after described governor valve (4) speed governing.
3. closed hydraulic loop according to claim 2, it is characterized in that, described high-pressure induct device is shuttle valve (5), two input ends of this shuttle valve (5) are connected to described HM Hydraulic Motor both sides, after described switch valve (3) was opened, described shuttle valve (5) can be exported described on high-tension side pressure oil and can flow into described governor valve (4) from the mouth of described shuttle valve (5).
4. closed hydraulic loop according to claim 3, is characterized in that, described switch valve (3) is arranged between the input end of the mouth of described shuttle valve (5) and described governor valve (4).
5. closed hydraulic loop according to claim 2, it is characterized in that, described unidirectional recycling device comprises the first one-way overflow valve (2b) and the second one-way overflow valve (3b) that setting pressure is identical, this first one-way overflow valve (2b) and the second one-way overflow valve (3b) are communicated with the both sides of described HM Hydraulic Motor (1) respectively, so that selectively enter described low pressure side by the first one-way overflow valve (2b) and the second one-way overflow valve (3b) through the described pressure oil after speed governing.
6. the described closed hydraulic loop of any one according to claim 2-4, it is characterized in that, described closed hydraulic loop comprises can be the feed circuit (b) of described closed hydraulic loop repairing, this feed circuit (b) is connected to described HM Hydraulic Motor (1) both sides, and described unidirectional recycling device is arranged in this described feed circuit (b).
7. closed hydraulic loop according to claim 6, it is characterized in that, described feed circuit comprises slippage pump (1b), the first one-way overflow valve (2b) and the second one-way overflow valve (3b), wherein, described the first one-way overflow valve (2b) and the second one-way overflow valve (2c) be described unidirectional recycling device and be communicated with the both sides of described HM Hydraulic Motor (1) respectively and setting pressure identical, the fuel-displaced side of described slippage pump (1b) is by between access point (c) access described the first one-way overflow valve (2b) and the second one-way overflow valve (3b), the intake side of described slippage pump (1b) is communicated with fuel tank (6).
8. closed hydraulic loop according to claim 7, it is characterized in that, described feed circuit comprises oil filter (4b) and three by pass valve (5b) in parallel with this oil filter (4b), described this oil filter (4b) is connected between described governor valve (4) and described unidirectional circuit device, and described feed circuit (b) comprises the 4th by pass valve (6b), between the oil inlet access described oil filter (4b) and described access point (c) of the 4th by pass valve (6b).
9. closed hydraulic loop according to claim 1, it is characterized in that, described bidirectional hydraulic pump comprises heat-radiation loop (d), this heat-radiation loop (d) comprises the radiator (1d) that is communicated with fuel tank (6) and the check valve (2d) in parallel with this radiator (1d), described check valve (2d) allows fluid to flow back to described fuel tank (6), described HM Hydraulic Motor (1) is two and is arranged in parallel, each described HM Hydraulic Motor all is equipped with flush valve (11), this flush valve (11) can be transmitted back to described fuel tank (6) by described heat-radiation loop with heat and the impurity of described HM Hydraulic Motor (1).
10. hoisting crane, this hoisting crane comprises crane arm, it is characterized in that, and described hoisting crane comprises the rotating closed hydraulic loop of the described control jib of any one in claim 1-9, and described jib is described crane arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681082 CN202988618U (en) | 2012-12-11 | 2012-12-11 | Closed hydraulic circuit for controlling cantilever crane to rotate, and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681082 CN202988618U (en) | 2012-12-11 | 2012-12-11 | Closed hydraulic circuit for controlling cantilever crane to rotate, and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202988618U true CN202988618U (en) | 2013-06-12 |
Family
ID=48559817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220681082 Expired - Lifetime CN202988618U (en) | 2012-12-11 | 2012-12-11 | Closed hydraulic circuit for controlling cantilever crane to rotate, and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202988618U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334465A (en) * | 2013-07-09 | 2013-10-02 | 徐州徐工挖掘机械有限公司 | Loading operation rotating speed self-adaptation system of hydraulic excavator |
| CN106640796A (en) * | 2016-10-12 | 2017-05-10 | 哈尔滨第机械集团有限公司 | Hydraulic transmission system for fan of tracked armored vehicle |
| CN107524661A (en) * | 2017-08-25 | 2017-12-29 | 武汉船用机械有限责任公司 | A kind of hydraulic system of rack-and-pinion lowering or hoisting gear |
| CN109292629A (en) * | 2018-10-26 | 2019-02-01 | 中船华南船舶机械有限公司 | A kind of crane Control in Hydraulic Rotation System |
| CN110201417A (en) * | 2019-06-26 | 2019-09-06 | 晨光生物科技集团股份有限公司 | A kind of infuser and its control method |
| CN110294428A (en) * | 2019-07-04 | 2019-10-01 | 江苏徐工工程机械研究院有限公司 | A kind of closed rotary control system and crane |
| CN113565834A (en) * | 2021-07-02 | 2021-10-29 | 中冶宝钢技术服务有限公司 | Hydrostatic walking drive circulation flushing control system |
-
2012
- 2012-12-11 CN CN 201220681082 patent/CN202988618U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334465A (en) * | 2013-07-09 | 2013-10-02 | 徐州徐工挖掘机械有限公司 | Loading operation rotating speed self-adaptation system of hydraulic excavator |
| CN103334465B (en) * | 2013-07-09 | 2016-05-18 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator car loading operation rotating speed Adaptable System |
| CN106640796A (en) * | 2016-10-12 | 2017-05-10 | 哈尔滨第机械集团有限公司 | Hydraulic transmission system for fan of tracked armored vehicle |
| CN107524661A (en) * | 2017-08-25 | 2017-12-29 | 武汉船用机械有限责任公司 | A kind of hydraulic system of rack-and-pinion lowering or hoisting gear |
| CN109292629A (en) * | 2018-10-26 | 2019-02-01 | 中船华南船舶机械有限公司 | A kind of crane Control in Hydraulic Rotation System |
| CN109292629B (en) * | 2018-10-26 | 2020-05-05 | 中船华南船舶机械有限公司 | Hydraulic rotating system of crane |
| CN110201417A (en) * | 2019-06-26 | 2019-09-06 | 晨光生物科技集团股份有限公司 | A kind of infuser and its control method |
| CN110201417B (en) * | 2019-06-26 | 2021-05-07 | 晨光生物科技集团股份有限公司 | Leacher and control method thereof |
| CN110294428A (en) * | 2019-07-04 | 2019-10-01 | 江苏徐工工程机械研究院有限公司 | A kind of closed rotary control system and crane |
| CN113565834A (en) * | 2021-07-02 | 2021-10-29 | 中冶宝钢技术服务有限公司 | Hydrostatic walking drive circulation flushing control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202988618U (en) | Closed hydraulic circuit for controlling cantilever crane to rotate, and crane | |
| CN102153027B (en) | Stepless regulation constant tension device for hydraulic winch | |
| CN104163385B (en) | A kind of winch hydraulic control system | |
| CN102588358B (en) | High-performance energy saving type electro-hydraulic servo control oil line | |
| CN202379608U (en) | Boarding rotating hydraulic control system and crane provided with same | |
| CN104047912B (en) | The digital pump controlled hydraulic differential cylinder in self-powered source | |
| CN102588357B (en) | Load sensitive hydraulic system and crane with hydraulic system | |
| CN102491173B (en) | Crane and closed type hoisting negative power control system for crane | |
| CN106032261A (en) | Tension control device of high-power hydraulic winch | |
| CN105951703A (en) | Hydraulic system for gear and rack type lifting mechanism | |
| CN105776046A (en) | Combined winch hydraulic system and crane using same | |
| CN202381448U (en) | Hydraulic oil cylinder and hydraulic system | |
| CN102515025B (en) | Superstructure rotary hydraulic control system and crane with same | |
| CN105387015A (en) | Energy-saving hydraulic valve | |
| CN202381430U (en) | Load-sensitive hydraulic system and crane with same | |
| CN109505812A (en) | A kind of variable pump bi-mode control hydraulic system and tunneling operation vehicle | |
| CN105927601B (en) | One kind lifting hydraulic system | |
| CN202108032U (en) | Emergency operating device and gate system of winch hoist | |
| CN202988617U (en) | Rotary hydraulic system of engineering machine and engineering machine | |
| CN203189367U (en) | Bypass throttling speed regulation system and crane | |
| CN207960641U (en) | Electro-hydraulic reversing valve group for hydraulic support | |
| CN103316799B (en) | High-pressure water conservancy injection system | |
| CN204041600U (en) | Multipath hydraulic motor speed governing feedback control valve | |
| CN204003677U (en) | Generating heating fluid pressure control device and paver | |
| CN105443481B (en) | Series parallel type crane banked direction control valves, hydraulic system and crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
|
| CX01 | Expiry of patent term |