CN203382397U - Wheeled crane and hydraulic control system thereof - Google Patents
Wheeled crane and hydraulic control system thereof Download PDFInfo
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- CN203382397U CN203382397U CN201320420894.0U CN201320420894U CN203382397U CN 203382397 U CN203382397 U CN 203382397U CN 201320420894 U CN201320420894 U CN 201320420894U CN 203382397 U CN203382397 U CN 203382397U
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Abstract
The utility model discloses a hydraulic control system for a wheeled crane. The hydraulic control system comprises a hydraulic oil box, a first hydraulic pump for driving a main system arranged on a first pressure oil path, a second hydraulic pump for driving a rotary system arranged at on a second pressure oil path, a third hydraulic pump of a main auxiliary system arranged on a third pressure oil path, and a radiator, wherein the radiator is arranged on a second oil return path of the rotary system or/and a third oil return path of the main auxiliary system. Compared with the prior art, the hydraulic control system has the advantages that the oil return quantity of the oil return path in the hydraulic control system is reasonably distributed, so that not only is the heat of the oil of the oil return path in the rotary system or/and the main auxiliary system fully dissipated, but also under the condition that the main system runs at high speed, extra throttling and spill loss caused by turning on a bypass check valve of the radiator are avoided, so that temperature rise of the hydraulic system caused by the extra throttling and spill loss is lowered. On the basis, the utility model also provides the wheeled crane comprising the hydraulic control system.
Description
Technical field
The utility model relates to the wheel crane technical field of hydraulic, particularly a kind of wheel crane and hydraulic control system thereof.
Background technology
Along with the exploitation of wheel crane, more and more higher to the control requirement of its hydraulic efficiency pressure system temperature rise.Existing medium and small tonnage crane mainly adopts the mode of hydraulic oil radiator heat radiation, and its characteristics are that the method can reduce the hydraulic efficiency pressure system temperature fast and effectively.
The typical hydraulic control system principle of wheel crane as shown in Figure 1, wheel crane get on the bus operation mainly comprise main system 1 ' (containing luffing, flexible and hoisting system), rotary system 2 ', main auxiliary system 3 ' (braking in a turn system 31 ', ancillary system 32 ' and a/c system 33 '); Wherein, main system 1 ' by first Hydraulic Pump 11 ' fuel feeding, rotary system 2 ' by second Hydraulic Pump 21 ' fuel feeding, restriction due to complete vehicle structure, driving engine and hydraulic oil pump are placed in gets off, the restriction of center steering body oil duct quantity, thus adopted by braking in a turn system 31 ', ancillary system 32 ' and a/c system 33 ' be referred to as main auxiliary system 3 ' by the 3rd Hydraulic Pump 34 ' fuel feeding.
The said system oil return is all by back pressure valve 6 ' enter again radiator 5 ' after being dispelled the heat, finally enter hydraulic reservoir 4 ' in, it should be noted that, the oil return circuit be communicated with at radiator 5 ' oil inlet arrange back pressure valve ' purpose, in order to give the repairing of main system 1 ' middle hoisting system, elevator stall when preventing that the crack mouth of heavy duty from falling.
Obviously, above-mentioned hydraulic control control system is dispelled the heat to pressure oil liquid by radiator, and oil return flow hour has rapid heat dissipation characteristics efficiently.But, in reality was used, in main system 1 ' high-speed motion process, due to total recirculating oil quantity higher than radiator 5 ' through-current capacity, the part oil return can only pass through radiator 5 ' bypass check valve 51 ' return hydraulic reservoir 4 ', cause oil return heat radiation insufficient, and because of open radiator 5 ' bypass check valve 51 ' carry out overflow, and the degradation of energy caused and system temperature rise.
In view of this, those skilled in the art urgently provide a kind of system of the hydraulic oil-returning for wheel crane, to solve wheel crane in main system high-speed motion process, the system oil return heat radiation is insufficient, and the degradation of energy and the system temperature rise that cause because of the bypass check valve overflow of radiator.
The utility model content
For above-mentioned defect, core purpose of the present utility model is, a kind of hydraulic control system for wheel crane is provided, to solve wheel crane in main system high-speed motion process, system oil return heat radiation is insufficient, and the degradation of energy and the system temperature rise that cause because of the bypass check valve overflow of radiator.On this basis, the utility model also provides a kind of wheel crane that comprises above-mentioned hydraulic control system.
Hydraulic control system for wheel crane provided by the utility model comprises:
Hydraulic reservoir;
The first Hydraulic Pump, be arranged at the main system of the first pressure oil circuit for driving;
The second Hydraulic Pump, be arranged at the rotary system of the second pressure oil circuit for driving;
The 3rd Hydraulic Pump, be arranged at the main auxiliary system of the 3rd pressure oil circuit for driving;
Radiator; Described radiator is arranged on the 3rd oil return circuit of the second oil return circuit of described rotary system and/or described main auxiliary system.
Preferably, also comprise back pressure valve, described back pressure valve is arranged between described radiator and described rotary system and/or described main auxiliary system, and the oil inlet of described back pressure valve is communicated with the repairing hole of described main system.
Preferably, described back pressure valve is specially check valve, by pass valve or damping hole.
Preferably, described the first Hydraulic Pump is load sensitive pump.
Preferably, described the second Hydraulic Pump and described the 3rd Hydraulic Pump are gear type pump.
The utility model also provides a kind of wheel crane, comprise main system, rotary system and main auxiliary system, also comprise the hydraulic control system of controlling described main system, described rotary system and described main auxiliary system, it is characterized in that, described hydraulic control system is specially hydraulic control system as above.
With respect to the above-mentioned background technology, the hydraulic control system for wheel crane that the utility model provides, comprise hydraulic reservoir, for driving, be arranged at the main system of the first pressure oil circuit the first Hydraulic Pump, for driving, be arranged at the rotary system of the second pressure oil circuit the second Hydraulic Pump, be arranged at the 3rd Hydraulic Pump and radiator of the main auxiliary system of the 3rd pressure oil circuit, this radiator is arranged at the second oil return circuit of rotary system or/and the 3rd oil return circuit of main auxiliary system.
Than prior art, the hydraulic control system of wheel crane that the utility model is provided for, or/and the oil return circuit of main auxiliary system, carry out reasonable distribution to the recirculating oil quantity of oil return circuit in hydraulic control system by radiator is arranged to rotary system.The oil return circuit of main system directly is communicated with hydraulic reservoir, its inner fluid flows directly in hydraulic reservoir without radiator, only make the fluid of rotary system and/or main auxiliary system oil return oil circuit by after radiator heat-dissipation, flow back to again in hydraulic reservoir, obviously, the utility model is by the improvement to the hydraulic control system oil return circuit, not only can make in rotary system or/and the fluid of main auxiliary system oil return oil circuit fully dispels the heat, and avoided in main system high-speed operation situation, radiator bypass one-way valve opens in prior art and cause extra throttling and excess flow loss, thereby can reduce the temperature rise of the hydraulic efficiency pressure system caused thus.
The accompanying drawing explanation
Fig. 1 shows the return oil system schematic diagram of wheel crane hydraulic control system in prior art;
Fig. 2 shows the return oil system schematic diagram of wheel crane hydraulic control system provided by the utility model.
In Fig. 2:
1 main system, 11 first Hydraulic Pumps, 2 rotary systems, 21 second Hydraulic Pumps, 3 main auxiliary systems, 31 braking in a turn systems, 32 ancillary systems, 33 a/c systemes, 34 the 3rd Hydraulic Pumps, 4 hydraulic reservoirs, 5 radiatores, 51 bypass check valves, 6 back pressure valves.
The specific embodiment
Core of the present utility model is, a kind of hydraulic control system for wheel crane is provided, to solve hydraulic control system of the prior art, in main system 1 high-speed operation process, too high radiator 5 circulatioies of oil return flow can't meet the demands, and cause the insufficient problem of system radiating, and flow into hydraulic reservoir 4 because of unnecessary fluid by radiator 5 bypass check valves 51, and cause the problem of superimposed back pressure to system.On this basis, the utility model also provides a kind of wheel crane that comprises above-mentioned hydraulic control system.
Without loss of generality, the existing specific embodiment that the hydraulic control system provided described in the utility model is described by reference to the accompanying drawings.
Refer to the return oil system schematic diagram that Fig. 2, Fig. 2 show wheel crane hydraulic control system provided by the utility model.
As shown in Figure 2, the hydraulic control system for wheel crane that this programme provides, comprise hydraulic reservoir 4, the first Hydraulic Pump 11, the second Hydraulic Pump 21, the 3rd Hydraulic Pump 34 and radiator 5; On wheel crane, truck system comprises main system 1, rotary system 2 and main auxiliary system 3; Wherein main system 1 comprises flexible, luffing and hoisting system, and main auxiliary system 3 comprises braking in a turn system 31, a/c system 33 and ancillary system 32.The first Hydraulic Pump 11 is arranged at the main system 1 of the first pressure oil circuit for driving, the second Hydraulic Pump 21 is arranged at the rotary system 2 of the second pressure oil circuit for driving, the 3rd Hydraulic Pump 34 is arranged at the main auxiliary system 3 of the 3rd pressure oil circuit for driving, radiator 5 is arranged on the oil return circuit of rotary system 2 and main auxiliary system 3.
Compare and prior art, this programme converges on total oil return circuit of formation by a minute oil return circuit that radiator 5 is arranged to rotary system 2 and main auxiliary system 3, reasonable distribution is carried out in oil return to hydraulic control system, the fluid of the oil return circuit of main system 1 directly flows back to hydraulic reservoir 4, and the hydraulic pressure of rotary system 2 and auxiliary main system 1 oil return circuit flows into hydraulic reservoir 4 after radiator 5 heat radiations again.Therefore, in main system 1 high-speed motion process, flow directly into hydraulic reservoir 4 by main system 1 generating portion fluid in the hydraulic control system oil return circuit, the part fluid that another part is produced by rotary system 2 and main auxiliary system 3 flows in hydraulic reservoir 4 after dispelling the heat via radiator 5 again, the recirculating oil quantity reduced by radiator 5 makes it meet the requirement of radiator 5 circulatioies, thereby the fluid to the part oil return circuit fully dispels the heat, avoided opening that radiator 5 bypass check valves 51 carry out overflow and the degradation of energy that causes and the temperature rise of system.
It should be noted that, in this programme, radiator 5 also can arrange in rotary system 2 and main auxiliary system 3 on the one oil return circuit, and another one directly is communicated with hydraulic reservoir 4.A branch road in 5 pairs of hydraulic control system oil return circuits of radiator is dispelled the heat, and obviously less flows into the recirculating oil quantity in it.Therefore, by this set, also can solve in main system 1 high-speed motion process, when the recirculating oil quantity of inflow radiator 5 inner fluids is greater than its circulation, need open radiator 5 vent relief valve throttlings, and cause the problem of the insufficient and degradation of energy of system radiating.
Further, hydraulic control system in this programme also comprises back pressure valve 6, as shown in Figure 2, this back pressure valve 6 is arranged between rotary system 2 and radiator 5, and the repairing hole of the oil inlet of back pressure valve 6 and main system 1 is communicated with, for main system 1 repairing, elevator stall when preventing that the crack mouth of hoisting system heavy duty from falling, thereby the functional reliability and the safety that have improved wheel crane.
Compared with prior art, this programme back pressure valve 6 is arranged between rotary system 2 and radiator 5, choose the repairing of the oil return of the second Hydraulic Pump 21 for main system 1 hoisting system, make the first Hydraulic Pump and the 3rd Hydraulic Pump 34 system oil returns without back pressure valve 6, thereby can reduce the local energy loss that the throttling because of back pressure valve 6 produces, and then can further reduce the temperature rise of fluid control.
It should be noted that, in this programme, back pressure valve 6 can be arranged between main auxiliary system 3 and radiator 5, perhaps be arranged between radiator 5 and main auxiliary system 3 and rotary system 2, the same local energy loss that can realize reducing back pressure valve 6 throttlings and produce, the purpose of the temperature rise of reduction fluid control.
In addition, it should be noted that, in this programme, back pressure valve 6 is specially check valve, and on the basis that meets the throttling function requirement, this back pressure valve also can adopt by pass valve or damping hole.
Further, in this programme, the first Hydraulic Pump 11 is load sensitive pump, flow and the pressure due to load sensitive pump self, exported carry out matched impedance, by load sensitive pump, driven the oil liquid temperature of oil return circuit of main system 1 low with respect to fix-displacement pump such as gear type pumps, therefore, this programme utilizes These characteristics, makes the different radiatores 5 of fluid of main system 1 oil return circuit flow directly into hydraulic reservoir 4.Be appreciated that in this programme, the first Hydraulic Pump 11 can be also the controllable capacity pump of other types on the basis that meets pump self delivery rate and pressure and the requirement of system load coupling.
Integral structure characteristics in view of wheel crane, with respect to main system 1, its rotary system 2 and main auxiliary system 3 also can meet functional requirement by fix-displacement pump, and in this programme, the concrete gear quantitative pump that adopts drives rotary system 2 and main auxiliary system 3 as the second Hydraulic Pump 21 and the 3rd Hydraulic Pump 34.In addition, with respect to variable pump systems, the oil liquid pressure of the oil return circuit of Constant Pump System is more stable, therefore, this programme is by being arranged at back pressure valve 6 between rotary system 2 and radiator 5, choose the repairing of the stable fix-displacement pump oil return in a road for hoisting system, guaranteed functional reliability and the safety of main system 1 interior hoisting system.Be appreciated that on the basis that meets the function needs, in this programme, the second Hydraulic Pump 21 and the 3rd Hydraulic Pump 34 also can be selected the fix-displacement pump of other types.
Except above-mentioned hydraulic control system, the utility model also provides a kind of wheel crane, main system 1, rotary system 2 and main auxiliary system 3, also comprise the hydraulic control system of controlling main system 1, rotary system 2 and main auxiliary system 3, described hydraulic control system is specially hydraulic control system as above.Be appreciated that these wheel crane basic function parts and principle of work and prior art are basic identical, those skilled in the art can realize fully based on prior art, therefore this paper repeats no more
The foregoing is only preferred implementation of the present utility model, do not form the restriction to the utility model protection domain.Any any modification of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present utility model.
Claims (6)
1. the hydraulic control system for wheel crane comprises:
Hydraulic reservoir (4);
The first Hydraulic Pump (11), be arranged at the main system (1) of the first pressure oil circuit for driving;
The second Hydraulic Pump (21), be arranged at the rotary system (2) of the second pressure oil circuit for driving;
The 3rd Hydraulic Pump (34), be arranged at the main auxiliary system (3) of the 3rd pressure oil circuit for driving;
Radiator (5); It is characterized in that, described radiator (5) is arranged on the oil return circuit of described rotary system (2) and/or described main auxiliary system (3).
2. hydraulic control system according to claim 1, it is characterized in that, also comprise back pressure valve (6), described back pressure valve (6) is arranged between described radiator (5) and described rotary system (2) and/or described main auxiliary system (3), and the oil inlet of described back pressure valve (6) is communicated with the repairing hole of described main system (1).
3. hydraulic control system according to claim 2, is characterized in that, described back pressure valve (6) is specially check valve, by pass valve or damping hole.
4. according to the described hydraulic control system of claim 2 or 3, it is characterized in that, described the first Hydraulic Pump (11) is load sensitive pump.
5. hydraulic control system according to claim 4, is characterized in that, described the second Hydraulic Pump (21) and described the 3rd Hydraulic Pump (34) are gear type pump.
6. a wheel crane, comprise main system, rotary system and main auxiliary system, also comprise the hydraulic control system of controlling described main system, described rotary system and described main auxiliary system, it is characterized in that, described hydraulic control system is specially the described hydraulic control system of any one in claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320420894.0U CN203382397U (en) | 2013-07-15 | 2013-07-15 | Wheeled crane and hydraulic control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320420894.0U CN203382397U (en) | 2013-07-15 | 2013-07-15 | Wheeled crane and hydraulic control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203382397U true CN203382397U (en) | 2014-01-08 |
Family
ID=49870909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320420894.0U Expired - Fee Related CN203382397U (en) | 2013-07-15 | 2013-07-15 | Wheeled crane and hydraulic control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203382397U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950850A (en) * | 2014-05-16 | 2014-07-30 | 安徽柳工起重机有限公司 | Revolving platform hydraulic braking system of automobile crane |
| CN105465106A (en) * | 2014-10-16 | 2016-04-06 | 徐州重型机械有限公司 | Hydraulic cooling system, control method and crane |
-
2013
- 2013-07-15 CN CN201320420894.0U patent/CN203382397U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950850A (en) * | 2014-05-16 | 2014-07-30 | 安徽柳工起重机有限公司 | Revolving platform hydraulic braking system of automobile crane |
| CN103950850B (en) * | 2014-05-16 | 2016-01-20 | 安徽柳工起重机有限公司 | Car hosit turn table hydraulic brake system |
| CN105465106A (en) * | 2014-10-16 | 2016-04-06 | 徐州重型机械有限公司 | Hydraulic cooling system, control method and crane |
| CN105465106B (en) * | 2014-10-16 | 2019-02-22 | 徐州重型机械有限公司 | Hydraulic radiating, control method and crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20200715 |