CN203922492U - Hydraulic starting system and hoisting crane - Google Patents
Hydraulic starting system and hoisting crane Download PDFInfo
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- CN203922492U CN203922492U CN201420295286.6U CN201420295286U CN203922492U CN 203922492 U CN203922492 U CN 203922492U CN 201420295286 U CN201420295286 U CN 201420295286U CN 203922492 U CN203922492 U CN 203922492U
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- capacity pump
- hydraulic
- controllable capacity
- main valve
- cold start
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Abstract
The utility model relates to a kind of hydraulic starting system and hoisting crane, hydraulic starting system comprises: actuating unit, controllable capacity pump, main valve and hydraulic reservoir, actuating unit provides driving power to controllable capacity pump, controllable capacity pump and hydraulic reservoir are all communicated with by oil circuit with main valve, main valve has oil inlet, be communicated with the oil feeding line of controllable capacity pump, main valve also has cold start-up drain tap, controls the electromagnetic valve of controllable capacity pump drain charge when being also provided with in cold start-up between cold start-up drain tap and hydraulic reservoir.The utility model is provided with electromagnetic valve between the cold start-up drain tap of main valve and hydraulic reservoir, and when cold start-up, utilizes this electromagnetic valve to set up connected relation for the oil feeding line in main valve and hydraulic reservoir, thereby realizes the off-load operation of controllable capacity pump.By this structure, can when actuating unit cold start-up, be first just controllable capacity pump off-load, avoid hydraulic efficiency pressure system to form higher resisting moment, thereby realize the smooth startup of actuating unit under low temperature environment.
Description
Technical field
The utility model relates to hydraulic technique, relates in particular to a kind of hydraulic starting system and hoisting crane.
Background technology
For the crane hydraulic system that adopts the controllable capacity pump of open type, controllable capacity pump in the hydraulic oil discharge capacity of the starting stage starting in maxim, for example, until when pump work pressure or the external pressure that loads at the pilot control opening G of controllable capacity pump are greater than certain numerical value (30bar), the pump stroking mechanism of controllable capacity pump can be adjusted to minimum value by the hydraulic oil discharge capacity of controllable capacity pump under the effect of hydraulic coupling.As shown in Figure 1, controllable capacity pump is that the driving engine of being used by hoisting crane is driven and rotated by auxiliary gear box, the main valve connecting when controllable capacity pump is when Median Function cannot off-load, and hydraulic efficiency pressure system, at engine starting moment build-up pressure, realizes controllable capacity pump discharge capacity and changed to minimum value by maxim.
Under the applicable ambient temperature of hydraulic oil, engine starting moment can overcome the moment resistance square that startup moment controllable capacity pump displacement variation is brought, realize the smooth startup of driving engine, but when ambient temperature lower (for example, lower than-20 ℃), because hydraulic pressure oil viscosity increases, cause the corresponding increase of resisting moment of hydraulic efficiency pressure system, when this resisting moment is greater than the staring torque of driving engine itself, driving engine is difficult to realize normal startup.
For addressing this problem; prior art conventionally can be directed to driving engine and improve; by improving the staring torque of driving engine, promote the cold starting performance under low temperature environment, but the resisting moment that need to overcome due to driving engine is difficult to quantification, therefore the comformability of improved driving engine is poor.On the other hand, existing hydraulic efficiency pressure system needs main valve can realize Median Function relief, but this requirement has limited the possible way of realization of main valve, and the meta off-load of main valve can cause restriction to the composite move of system.
Utility model content
The purpose of this utility model is to propose a kind of hydraulic starting system and hoisting crane, can under low temperature environment, reduce the resisting moment of actuating unit, realizes the smooth startup under low temperature environment.
Aspect one of the present utility model, a kind of hydraulic starting system is provided, comprise: actuating unit, controllable capacity pump, main valve and hydraulic reservoir, described actuating unit provides driving power to described controllable capacity pump, described controllable capacity pump and described hydraulic reservoir are all communicated with by oil circuit with described main valve, wherein, described main valve has oil inlet, be communicated with the oil feeding line of described controllable capacity pump, described main valve also has cold start-up drain tap, controls the electromagnetic valve of described controllable capacity pump drain charge when being also provided with in cold start-up between described cold start-up drain tap and hydraulic reservoir.
Further, described cold start-up drain tap adopts standby oil inlet or pressure tap, and described standby oil inlet or pressure tap are communicated with by oil circuit in the valve body of described main valve with described oil inlet.
Further, described actuating unit comprises driving engine and auxiliary gear box, and described driving engine drives described controllable capacity pump by described auxiliary gear box.
Further, the not drain charge of meta of described main valve.
Further, also comprise the cold starting switch being arranged on control panel, be electrically connected to described electromagnetic valve.
Of the present utility model, aspect another, provide a kind of hoisting crane, wherein, comprised aforesaid hydraulic starting system.
Based on technique scheme, the utility model is provided with electromagnetic valve between the cold start-up drain tap of main valve and hydraulic reservoir, and when cold start-up, utilize this electromagnetic valve to set up connected relation for the oil feeding line in main valve and hydraulic reservoir, thereby realize the off-load operation of controllable capacity pump.By this structure, can when actuating unit cold start-up, be first just controllable capacity pump off-load, avoid hydraulic efficiency pressure system to form higher resisting moment, thereby realize the smooth startup of actuating unit under low temperature environment.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of existing driving engine-hydraulic efficiency pressure system.
Fig. 2 is the structural representation of an embodiment of the utility model hydraulic starting system.
Fig. 3 is the structural representation of another embodiment of the utility model hydraulic starting system.
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 2, be the structural representation of an embodiment of the utility model hydraulic starting system.In the present embodiment, hydraulic starting system comprises: actuating unit 1, controllable capacity pump 2, main valve 3 and hydraulic reservoir 4, and actuating unit 1 provides driving power to controllable capacity pump 2, and controllable capacity pump 2 and hydraulic reservoir 4 are all communicated with by oil circuit with main valve 3.
Main valve 3 is provided with a plurality of hydraulic fluid ports, and wherein oil inlet P is communicated with the oil feeding line of controllable capacity pump 2, also has cold start-up drain tap on main valve 3, controls the electromagnetic valve 5 of controllable capacity pump 2 drain charges when being provided with in cold start-up between cold start-up drain tap and hydraulic reservoir 4.When cold start-up, system can utilize this electromagnetic valve 5 to set up connected relation for oil feeding line and hydraulic reservoir 4 in main valve 3, thereby the off-load that realizes controllable capacity pump 2 operates.By this structure, can when actuating unit 1 cold start-up, be just first controllable capacity pump 2 off-loads, avoid hydraulic efficiency pressure system to form higher resisting moment, thereby realize the smooth startup of actuating unit 1 under low temperature environment.
Cold start-up drain tap can be on ad hoc main valve, the hydraulic fluid port that can communicate with the outlet of controllable capacity pump 2, also can utilize existing hydraulic fluid port on main valve, example standby oil inlet P 1 as shown in Figure 2, or the pressure tap M shown in Fig. 3, as we can see from the figure, standby oil inlet P 1 or pressure tap M are communicated with by oil circuit in the valve body of main valve 3 with the oil inlet P of link variable pump 2.
Actuating unit 1 is for controllable capacity pump 2 provides power, makes the mechanism of its running, can adopt various existing actuating unit forms.In the utility model illustrative examples, actuating unit 1 comprises driving engine and auxiliary gear box, driving engine is system primary mover, for whole hydraulic efficiency pressure system provides power, and auxiliary gear box changes driving engine mouth, realize a plurality of output ports, driving engine just can drive many controllable capacity pumps by auxiliary gear box like this.In another embodiment, also can directly drive controllable capacity pump by driving engine.
In the utility model preferred embodiment, by the off-load that can realize main valve that arranges of electromagnetic valve 5, so main valve 3 can select the form of not drain charge of meta, so just reduced the restriction of main valve Median Function, expanded the alternative of main valve.
Except utilizing system automatic control electric magnet valve, when low temperature environment starts, realize controllable capacity pump off-load, operator also can be arranged on the cold starting switch on control panel by setting, carry out the off-load of direct control variable pump, the cold starting switch (not shown) that is about to be arranged on control panel is electrically connected to electromagnetic valve, when operator operates cold starting switch, electromagnetic valve switches, and makes oil feeding line and hydraulic reservoir 4 in main valve 3 set up connected relation, realizes the off-load operation of controllable capacity pump 2.Cold starting switch is steady state conditions switch, for example can be realized by any bistable state or two-position switch, bistable state or two-position switch such as but not limited to toggle switch, stir button, slide switch, rotor switch or rocker switch.In addition, cold starting switch for example can be by realizing as the touch-screen switch of seeing in the control panel touch-screen in control cabin.In addition, cold starting switch also can be used as the button of a pair of complementation and realizes, and this is arranged to press next button to button and causes a kind of in selected two states, and press another button, causes the another kind in selected two states.Optionally, cold starting switch also can be controlled by voice recognition software.
Hydraulic starting system of the present utility model is applicable to all kinds of equipment or the vehicles that have hydraulic efficiency pressure system and may start under low temperature environment, especially the engineering machinery vehicle of hoisting crane and so on, utilize hydraulic starting system of the present utility model can make hoisting crane obtain good cold starting performance, improve the comformability to environment.
Based on aforesaid hydraulic starting system embodiment, the casehistory implementation procedure of hydraulic starting once below, as follows: to judge whether ambient temperature meets the preset temperature condition of actuating unit cold start-up, if met, carry out Cold Start, otherwise step starts routinely, i.e. the normal setting up procedure of existing hydraulic efficiency pressure system.First Cold Start operates the cold start-up drain tap of main valve and the electromagnetic valve between hydraulic reservoir, connects the oil circuit of controllable capacity pump and described hydraulic reservoir, and by this oil circuit, realizes the drain charge of described controllable capacity pump; Restart described actuating unit, and when described actuating unit meets preset rotation speed requirement, operate the cold start-up drain tap of described main valve and the electromagnetic valve between hydraulic reservoir, disconnect the oil circuit of described controllable capacity pump and described hydraulic reservoir, and end operation.
In above-mentioned steps, the judgement of ambient temperature can be completed automatically by system, also can have been assisted by operator, and the preset temperature condition of this actuating unit cold start-up is exemplified as ambient temperature lower than-10 ℃, also can be a temperature range, such as-20 ℃～-10 ℃ etc.At this temperature, system automatic control electric magnet valve or operator are by being arranged on control panel and the cold starting switch being electrically connected to electromagnetic valve is controlled electromagnetic valve obtain the electric off-load that realizes controllable capacity pump, the pressure peak of avoiding controllable capacity pump to form in the descending change procedure of discharge capacity.
Actuating unit can specifically comprise driving engine and auxiliary gear box, and in Cold Start, when step starts actuating unit, driving engine drives controllable capacity pump by auxiliary gear box.When the satisfied preset rotation speed of actuating unit requires (800 revs/min of the idling speed of driving engine), system can automatic control electric magnet valve or operator by being arranged on control panel and the cold starting switch being electrically connected to electromagnetic valve operation electromagnetic valve, disconnect the oil circuit of controllable capacity pump and hydraulic reservoir, finish Cold Start.
When introducing the element of each side of the present utility model or embodiment, article " ", " one ", " being somebody's turn to do " and " described " are intended to represent to exist one or more in element.Term " comprises ", " comprising " and " having " mean comprising property, and represent to have other element except listing element.
Described the exemplary embodiment of hydraulic starting system and crane facility above in detail.Yet this system and equipment are not limited to specific embodiment as herein described, on the contrary, the member of this system and/or equipment can be used independently and dividually with other member as herein described.In addition, described member also can be limited in other system and/or equipment, or can use in conjunction with it, and is not limited to only utilize system as herein described and equipment to implement.
This written explanation has used the example that comprises optimal mode to disclose the utility model, and also enables those skilled in the art to implement the utility model, and comprise and make and use any device or system, and the method for carrying out any combination.The scope of the claims of the present utility model is limited by claim, and can comprise other example that those of ordinary skills conceive.If these other examples there is no different from the written language in claim, or if these other examples comprise and the written language of the claim equivalent structure element without substantive difference, by within meaning the scope of such example in claim.
Claims (6)
1. a hydraulic starting system, comprise: actuating unit, controllable capacity pump, main valve and hydraulic reservoir, described actuating unit provides driving power to described controllable capacity pump, described controllable capacity pump and described hydraulic reservoir are all communicated with by oil circuit with described main valve, it is characterized in that, described main valve has oil inlet, be communicated with the oil feeding line of described controllable capacity pump, described main valve also has cold start-up drain tap, controls the electromagnetic valve of described controllable capacity pump drain charge when being also provided with in cold start-up between described cold start-up drain tap and hydraulic reservoir.
2. hydraulic starting system according to claim 1, is characterized in that, described cold start-up drain tap adopts standby oil inlet or pressure tap, and described standby oil inlet or pressure tap are communicated with by oil circuit in the valve body of described main valve with described oil inlet.
3. hydraulic starting system according to claim 1, is characterized in that, described actuating unit comprises driving engine and auxiliary gear box, and described driving engine drives described controllable capacity pump by described auxiliary gear box.
4. hydraulic starting system according to claim 1, is characterized in that, the not drain charge of meta of described main valve.
5. hydraulic starting system according to claim 1, is characterized in that, also comprises the cold starting switch being arranged on control panel, is electrically connected to described electromagnetic valve.
6. a hoisting crane, is characterized in that, comprises the arbitrary described hydraulic starting system of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420295286.6U CN203922492U (en) | 2014-06-04 | 2014-06-04 | Hydraulic starting system and hoisting crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420295286.6U CN203922492U (en) | 2014-06-04 | 2014-06-04 | Hydraulic starting system and hoisting crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203922492U true CN203922492U (en) | 2014-11-05 |
Family
ID=51818348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420295286.6U Withdrawn - After Issue CN203922492U (en) | 2014-06-04 | 2014-06-04 | Hydraulic starting system and hoisting crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203922492U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003306A (en) * | 2014-06-04 | 2014-08-27 | 徐工集团工程机械股份有限公司 | Hydraulic starting system, method and crane |
| CN107524552A (en) * | 2017-08-30 | 2017-12-29 | 中国煤炭科工集团太原研究院有限公司 | A kind of cold-starting device of anti-explosion diesel engine vehicle |
-
2014
- 2014-06-04 CN CN201420295286.6U patent/CN203922492U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003306A (en) * | 2014-06-04 | 2014-08-27 | 徐工集团工程机械股份有限公司 | Hydraulic starting system, method and crane |
| CN104003306B (en) * | 2014-06-04 | 2017-04-12 | 徐工集团工程机械股份有限公司 | Hydraulic starting system, method and crane |
| CN107524552A (en) * | 2017-08-30 | 2017-12-29 | 中国煤炭科工集团太原研究院有限公司 | A kind of cold-starting device of anti-explosion diesel engine vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20170412 |