CN202988617U - Rotary hydraulic system of engineering machine and engineering machine - Google Patents
Rotary hydraulic system of engineering machine and engineering machine Download PDFInfo
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- CN202988617U CN202988617U CN 201220678616 CN201220678616U CN202988617U CN 202988617 U CN202988617 U CN 202988617U CN 201220678616 CN201220678616 CN 201220678616 CN 201220678616 U CN201220678616 U CN 201220678616U CN 202988617 U CN202988617 U CN 202988617U
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Abstract
The utility model discloses a rotary hydraulic system of an engineering machine. The rotary hydraulic system comprises a hydraulic motor (1) and a bidirectional hydraulic pump (2), wherein the bidirectional hydraulic pump (2) is communicated with two sides of the hydraulic motor (1); and the hydraulic system also comprises switching valves (3) which are connected to two sides of the hydraulic motor (1). The rotary hydraulic system is characterized in that damper valves (4) are connected in series between the switching valves (3) and hydraulic motor (1). The utility model also discloses the engineering machine with the rotary hydraulic system provided by the utility model. According to the rotary hydraulic system and the engineering machine, the pressure oil at the high-pressure side of the hydraulic motor just can flow back to the low pressure side after the speed is limited by the damper valves during the operation of freely sliding and rotating an arm frame, therefore, the rotary speed can be limited, and higher safety and reliability of the arm frame in rotating can be ensured, and furthermore, the safety and the practicability of the engineering machine can be improved.
Description
Technical field
The utility model relates to the revolution of dominant project machinery and controls Hydraulic Field, particularly, relates to a kind of construction machinery and equipment of Hydraulic slewing system and this Hydraulic slewing system of use of construction machinery and equipment.
Background technology
In jib revolution field, particularly in the crane arm revolution field of hoisting crane, usually use the revolution of HYDRAULIC CONTROL SYSTEM jib, and this hydraulic efficiency pressure system 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, hydraulic efficiency pressure system 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 the switch valve conducting, can realize the free rotary function of jib.Particularly, be connected to by hydraulic tubing between two actuator ports of HM Hydraulic Motor, on this hydraulic tubing, switch valve be set.When needs carry out the free rotary operation, the switch valve conducting, two hydraulic fluid ports of HM Hydraulic Motor are communicated with, and namely the on high-tension side pressure oil of HM Hydraulic Motor can flow into low pressure side by switch valve, thereby realizes the free rotary of jib.
Yet, although existing Hydraulic slewing system can realize the function of free rotary, but only can be applicable to the less minor crane of jib etc., this is owing to directly being communicated with between the actuator port of motor both sides, but 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, this is for the safe in operation of hoisting crane, abnormally dangerous, especially concerning the goliath of large-scale jib, easily cause Peril Incident to occur.
The utility model content
A purpose of the present utility model is to provide a kind of Hydraulic slewing system of construction machinery and equipment, and this Hydraulic slewing system can make when carrying out free rotary, and the speed of revolutions of HM Hydraulic Motor is controlled, and reliability is high.
Another purpose of the present utility model is to provide a kind of construction machinery and equipment, the Hydraulic slewing system of the construction machinery and equipment that this project machinery use the utility model provides.
To achieve these goals, according to an aspect of the present utility model, a kind of Hydraulic slewing system of construction machinery and equipment is provided, comprise HM Hydraulic Motor and the bidirectional hydraulic pump that is communicated with this HM Hydraulic Motor both sides, and described hydraulic efficiency pressure system comprises the switch valve that connects described HM Hydraulic Motor both sides, wherein, be serially connected with dash pot valve between described switch valve and described HM Hydraulic Motor.
Preferably, be formed with the cutoff port that diameter is 1cm ~ 1.5cm in described dash pot valve.
Preferably, described hydraulic efficiency pressure system also comprises allow the freely rotating rotary braking of described HM Hydraulic Motor mechanism when described switch valve conducting.
Preferably, described rotary braking mechanism comprises rotary braking cylinder and change-over valve, is provided with spring in the rodless cavity of described rotary braking cylinder, and described change-over valve is communicated with to control oil and flows into and flow out described rod chamber with the rod chamber of described rotary braking cylinder.
Preferably, described hydraulic efficiency pressure system comprises can be the feed circuit of described HM Hydraulic Motor both sides repairing, and this feed circuit is connected to described HM Hydraulic Motor both sides.
Preferably, described feed circuit comprises slippage pump, the first one-way overflow valve and the second one-way overflow valve, wherein, both sides connection and the setting pressure with described HM Hydraulic Motor is identical respectively with the second one-way overflow valve for described the first one-way overflow valve, 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, and described feed circuit comprises the 4th by pass valve that is communicated with fuel tank, between the oil inlet described oil filter of access and described access point of the 4th by pass valve.
According on the other hand of the present utility model, a kind of construction machinery and equipment is provided, comprise the Hydraulic slewing system of swing type mechanism and this swing type mechanism of driving, the Hydraulic slewing system that described Hydraulic slewing system provides for the utility model.
Preferably, described construction machinery and equipment is hoisting crane, and this hoisting crane comprises crane arm, and this crane arm is arranged on described swing type mechanism.
Pass through technique scheme, the Hydraulic slewing system that provides due to the utility model comprises the dash pot valve that is serially connected between switch valve and HM Hydraulic Motor, therefore when carrying out the free rotary operation, the on high-tension side pressure oil of HM Hydraulic Motor can be by flowing back to low pressure side after the speed limit of dash pot valve, therefore can realize speed of revolutions is limited, make free rotary safe and reliable of jib for example, and further promoted safety and the practicality of construction machinery and equipment.
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 hydraulic efficiency pressure system that provides of the utility model preferred implementation.
Description of reference numerals
1 HM Hydraulic Motor 2 bidirectional hydraulic pumps
3 switch valve 4 dashs pot valve
6 fuel tank 7 rotary braking mechanisms
71 rotary braking cylinder 72 change-over valves
8 springs
X controls oil
B feed circuit c access point
1b slippage pump 2b the first one-way overflow valve
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
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, a kind of Hydraulic slewing system of construction machinery and equipment is provided, comprise HM Hydraulic Motor 1 and the bidirectional hydraulic pump 2 that is communicated with this HM Hydraulic Motor 1 both sides, providing pressure oil as this HM Hydraulic Motor 1, make HM Hydraulic Motor 1 to drive such as swing type mechanisms such as jibs and turn round.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 the hydraulic efficiency pressure system that the utility model provides, bidirectional hydraulic pump 2 and HM Hydraulic Motor 1 consist of closed hydraulic loop, pressure oil wherein can be recycled, therefore consider the Hydraulic Elements such as Hydraulic Pump and HM Hydraulic Motor leakage feed circuit b also preferably is set with the leakage in the compensation closed hydraulic loop, in addition, the devices such as heat-radiation loop, flush valve, radiator can also be set, in time to take away the heat that produces in the loop.
As shown in Figure 1, the Hydraulic slewing system 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 for example, no matter the HM Hydraulic Motor forward is still reversed, and the inevitable side in its both sides is the high pressure side, and a side is low pressure side, carry out in the process of free rotary at jib this moment, needs the on high-tension side pressure oil of HM Hydraulic Motor 1 is compensated to low pressure side.Therefore, the hydraulic efficiency pressure system that provides at the utility model comprises the switch valve 3 that is connected to HM Hydraulic Motor 1 both sides, when this switch valve 3 conducting, can be communicated with the both sides of HM Hydraulic Motor 1, make pressure oil flow to low pressure side from the high pressure side, thereby realize freely turning round of HM Hydraulic Motor 1, to complete the free rotary action of jib.And after switch valve 3 cut-offs, make HM Hydraulic Motor 1 turn round normally operation.
Wherein, in order to realize the purpose of this utility model, namely realize the speed limit of carrying out of jib free rotary, make the free rotary speed of jib controlled, in the utility model, be serially connected with dash pot valve 4 between switch valve 3 and HM Hydraulic Motor 1.Therefore, after switch valve 3 conductings, on high-tension side pressure oil can pass through switch valve 3 and dash pot valve 4, to flow back to low pressure side through after the speed limit of dash pot valve 4.Thereby make when jib carries out free rotary, speed is slowly controlled, and is more safe and reliable, and be particularly useful for having the free rotary of the hoisting crane of large-scale jib, to promote its safety and practicality.
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 conducting after electric; to carry out the free rotary operation of above-mentioned jib, can end to carry out the normal revolution operation of jib after dead electricity.The valve member that has switching function for other kinds also should drop in protection domain of the present utility model equally.
Wherein, dash pot valve 4 mentioned in the utility model can form by various valve members with shock damping action, wherein preferably, the inside of dash pot valve 4 is formed with and directly is the cutoff port of 1.0cm ~ 1.5cm, by this cutoff port, the fluid of this dash pot valve 4 of flowing through being carried out throttling governing, thereby realize the safe and reliable of jib free rotary.Certainly; in other NM embodiments; the dash pot valve 4 that the utility model provides can also realize shock damping action by valve members such as various change-over valves with cutoff port, reducing valve, governor valves, all should drop on protection domain of the present utility model for this mode of texturing under the utility model design.In addition, for the size of cutoff port, those skilled in the art can design according to specification and the desired speed limit degree of jib, all drop in protection domain of the present utility model for the design of this size.
In addition, as shown in Figure 1, in the preferred implementation that the utility model provides, in order further to guarantee the rotating safe reliability of jib, hydraulic efficiency pressure system also comprises when switch valve 3 conducting and to allow the freely rotating rotary braking of HM Hydraulic Motor 1 mechanism 7, this rotary braking mechanism 7 can be when jib turn round, the rotation of restriction HM Hydraulic Motor 1, thereby guarantee the safety of jib operation, and when jib need to carry out free rotary, can allow HM Hydraulic Motor 1 to carry out free revolution, thereby complete the purpose of this utility model.
Particularly, rotary braking mechanism 7 comprises rotary braking cylinder 71 and change-over valve 72, is provided with spring 8 in the rodless cavity of rotary braking cylinder 71, and change-over valve 72 is communicated with to control oily X and flows into and flow out from rod chamber with the rod chamber of rotary braking cylinder 71.More specifically, change-over valve 72 is two position three way directional control valve, when needs allow HM Hydraulic Motor 1 to rotate, can will be controlled in the rod chamber that oily X is incorporated into rotary braking cylinder 71 by change-over valve 72, makes the piston rod retraction; And when needs were braked HM Hydraulic Motor 1, the working position of changeable change-over valve 72 made the oily X of control flow out from rod chamber, thereby stretched out by spring 8 pushing piston bars, to play brake action.For aforesaid way, those skilled in the art can also make various changes and replacement, and such as the kind of change-over valve 72 and principle of work etc. is for these changes with replace and all should drop in protection domain of the present utility model.
In addition, as shown in Figure 1, the feed circuit b that the utility model provides can replenish the fluid that loses because of reasons such as leakages for hydraulic efficiency pressure system.Wherein preferably, 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 be connected that one-way overflow valve 3b connects with the both sides of HM Hydraulic Motor 1 respectively and setting pressure is identical, 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, and intake side is communicated with fuel tank 6, the hydraulic efficiency pressure system 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.Therefore, the fluid of slippage pump 1b can be selectively flows into low pressure side in HM Hydraulic Motor 1 both sides by the first one-way overflow valve 2b and the second one-way overflow valve 3b, thereby plays the repairing effect.
In addition, comprise oil filter 4b and the three by pass valve 5b in parallel with this oil filter 4b at feed circuit b, 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 6, 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 feed circuit b, and guarantee the safety of this feed circuit b.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 b.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.
To sum up, the Hydraulic slewing system that the utility model preferred implementation provides can be passed through opening switch valve 3, and the on high-tension side pressure oil of HM Hydraulic Motor 1 is undertaken flowing back to the low pressure side of HM Hydraulic Motor 1 after speed limit by dash pot valve 4, thereby can complete safely and reliably for example free rotary operation of the swing type mechanism of jib.Therefore the utility model also provides a kind of construction machinery and equipment, and this project machinery comprises swing type mechanism and drives the Hydraulic slewing system of this swing type mechanism, the Hydraulic slewing system that this Hydraulic slewing system provides for the utility model.Particularly, this hoisting crane comprises crane arm, and uses the revolution of the HYDRAULIC CONTROL SYSTEM jib that the utility model provides.Then make Hydraulic slewing system and the construction machinery and equipment 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 (9)
1. the Hydraulic slewing system of a construction machinery and equipment, comprise HM Hydraulic Motor (1) and the bidirectional hydraulic pump (2) that is communicated with this HM Hydraulic Motor (1) both sides, and described hydraulic efficiency pressure system comprises the switch valve (3) that connects described HM Hydraulic Motor (1) both sides, it is characterized in that, be serially connected with dash pot valve (4) between described switch valve (3) and described HM Hydraulic Motor (1).
2. Hydraulic slewing system according to claim 1, is characterized in that, is formed with the cutoff port that diameter is 1cm ~ 1.5cm in described dash pot valve (4).
3. Hydraulic slewing system according to claim 1, is characterized in that, described hydraulic efficiency pressure system also comprises allow described HM Hydraulic Motor (1) freely rotating rotary braking mechanism (7) when described switch valve (3) conducting.
4. Hydraulic slewing system according to claim 3, it is characterized in that, described rotary braking mechanism (7) comprises rotary braking cylinder (71) and change-over valve (72), be provided with spring (8) in the rodless cavity of described rotary braking cylinder (71), described change-over valve (72) is communicated with to control oil (X) and flows into and flow out described rod chamber with the rod chamber of described rotary braking cylinder (71).
5. the described Hydraulic slewing system of any one according to claim 1-4, it is characterized in that, described hydraulic efficiency pressure system comprises can be the feed circuit (b) of described HM Hydraulic Motor (1) both sides repairing, and this feed circuit (b) is connected to described HM Hydraulic Motor (1) both sides.
6. Hydraulic slewing system according to claim 5, 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, both sides connection and the setting pressure with described HM Hydraulic Motor (1) is identical respectively with the second one-way overflow valve (3b) for described the first one-way overflow valve (2b), 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).
7. Hydraulic slewing system according to claim 6, 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), and described feed circuit (b) comprises the 4th by pass valve (6b) that is communicated with fuel tank, between the oil inlet access described oil filter (4b) and described access point (c) of the 4th by pass valve (6b).
8. construction machinery and equipment comprises swing type mechanism and drives the Hydraulic slewing system of this swing type mechanism, it is characterized in that, described Hydraulic slewing system is the described Hydraulic slewing system of any one according to claim 1-7.
9. construction machinery and equipment according to claim 8, is characterized in that, described construction machinery and equipment is hoisting crane, and this hoisting crane comprises crane arm, and this crane arm is arranged on described swing type mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678616 CN202988617U (en) | 2012-12-11 | 2012-12-11 | Rotary hydraulic system of engineering machine and engineering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678616 CN202988617U (en) | 2012-12-11 | 2012-12-11 | Rotary hydraulic system of engineering machine and engineering machine |
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| Publication Number | Publication Date |
|---|---|
| CN202988617U true CN202988617U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220678616 Expired - Lifetime CN202988617U (en) | 2012-12-11 | 2012-12-11 | Rotary hydraulic system of engineering machine and engineering machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202988617U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847719A (en) * | 2014-09-24 | 2015-08-19 | 北汽福田汽车股份有限公司 | Closed oil pump hydraulic system and engineering machinery having same |
| CN106629431A (en) * | 2016-12-30 | 2017-05-10 | 徐州重型机械有限公司 | Hoist |
| CN107140562A (en) * | 2017-06-16 | 2017-09-08 | 徐州重型机械有限公司 | Turn round hydraulic control system, method and crane |
-
2012
- 2012-12-11 CN CN 201220678616 patent/CN202988617U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847719A (en) * | 2014-09-24 | 2015-08-19 | 北汽福田汽车股份有限公司 | Closed oil pump hydraulic system and engineering machinery having same |
| CN106629431A (en) * | 2016-12-30 | 2017-05-10 | 徐州重型机械有限公司 | Hoist |
| CN106629431B (en) * | 2016-12-30 | 2018-06-26 | 徐州重型机械有限公司 | Crane |
| CN107140562A (en) * | 2017-06-16 | 2017-09-08 | 徐州重型机械有限公司 | Turn round hydraulic control system, method and crane |
| CN107140562B (en) * | 2017-06-16 | 2019-05-21 | 徐州重型机械有限公司 | Turn round hydraulic control system, method and crane |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |