CN201621027U - Variable displacement pump of plunger - Google Patents
Variable displacement pump of plunger Download PDFInfo
- Publication number
- CN201621027U CN201621027U CN2010201564371U CN201020156437U CN201621027U CN 201621027 U CN201621027 U CN 201621027U CN 2010201564371 U CN2010201564371 U CN 2010201564371U CN 201020156437 U CN201020156437 U CN 201020156437U CN 201621027 U CN201621027 U CN 201621027U
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- China
- Prior art keywords
- plunger
- swash plate
- variable pump
- stroking mechanism
- plunger variable
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Abstract
The utility model relates to the technical field of hydraulic pumps, which discloses a variable displacement pump of a plunger. The variable displacement pump of the plunger comprises a plunger pump and a stroking mechanism used for regulating the inclination angle of a swash plate and also comprises a driving device connected with the stroking mechanism; before the variable displacement pump of the plunger is started, the driving device is used for driving the stroking mechanism, so that the swash plate is positioned at a position with the required inclination angle. Before the variable displacement pump of the plunger, which has the structure, is started, the stroking mechanism is firstly driven by the driving device, so that the stroking mechanism regulates the inclination angle of the swash plate, and the swash plate is positioned at a position with a smaller inclination angle. In this way, the oil absorption of the variable displacement pump of the plunger is not full displacement when the variable displacement pump of the plunger is started, and the occurrence of the phenomenon of air suction can be avoided when the variable displacement pump of the plunger is started, so that the variable displacement pump of the plunger has longer service life.
Description
Technical field
The utility model relates to the oil hydraulic pump technical field, relates in particular to a kind of plunger variable pump.
Background technique
Plunger variable pump has compact structure, the specific power volume is little, working pressure is high, easily realizes advantages such as variable, can also realize zero delivery output after the startup during in zero load, and therefore, plunger variable pump is widely used on the coal mine roadway mining machinery.
Please referring to Fig. 1, Fig. 1 is a kind of structural representation of typical plunger variable pump.
As shown in Figure 1, this plunger variable pump comprises transmission shaft 11, swash plate 12, plunger 13, cylinder body 14 and stroking mechanism.One end of transmission shaft 11 is installed on the housing of this plunger variable pump, the other end is installed on the back cover, the side of transmission shaft 11 is provided with the swash plate 12 that can swing, the plunger 13 that can do expanding-contracting action with swash plate 12 successively, and an end of plunger 13 is connected with swash plate 12, and the other end is socketed in the cylinder body 14.Swash plate 12 has the inclination angle, and this inclination angle is meant the angle between swash plate 12 and transmission shaft 11 are radially.Because swash plate 12 has the inclination angle, when cylinder body 14 rotation under transmission shaft 11 drives, in certain angle range, plunger 13 can be protruding, and swept volume becomes big in cylinder body 14 chambeies, forms parital vacuum; In another angle range, plunger 13 is pressed to cylinder body 14 inside by swash plate, and working chamber volume is reduced, and the fluid in the active chamber is squeezed, and discharges by oil outlet.
The plunger variable pump delivery is relevant with the inclination angle size of swash plate 12, and the inclination angle of swash plate 12 is big more, and the plunger variable pump delivery is big more.Plunger variable pump also is provided with stroking mechanism, and stroking mechanism is used to adjust the inclination angle of swash plate.
A kind of common stroking mechanism as shown in Figure 1, this stroking mechanism comprises piston 151, first cylinder body 152, second cylinder body 153, spring 154 and connecting rod 155, the two ends of piston 151 are socketed in first cylinder body 152 respectively, in the cavity of second cylinder body 153, piston 151 is connected with swash plate 12 by connecting rod 155, be provided with spring 154 between the piston 151 and second cylinder body 152, the cylinder body of first cylinder body 152 or second cylinder body 153 is provided with hydraulic oil port 156, when in first cylinder body 152 or second cylinder body 153, injecting hydraulic oil by hydraulic oil port 156, hydraulic oil will promote piston 151 actions, piston 151 will drive swash plate 12 actions, make the inclination angle of swash plate 12 obtain adjusting.Hydraulic oil port 156 can be communicated with the actuator port of plunger variable pump, can adjust the inclination angle of swash plate 12 according to the operating oil pressure of plunger variable pump, promptly adjusts the plunger variable pump delivery.
When plunger variable pump does not start, under the effect of spring 154, piston 151 is positioned at the minimum stroke position, this moment, swash plate 12 was in the position of inclination angle maximum, therefore, when starting plunger variable pump, the oil suction of plunger variable pump is the set solid amount, and the suction capacity of plunger variable pump a little less than, externally under the influence of environment, plunger variable pump easily produces the emptying phenomenon of moment when starting, and emptying phenomenon is bigger to the injury of plunger variable pump, thereby cause the working life of plunger variable pump shorter, and then cause the maintenance cost of equipment higher.
The model utility content
The purpose of this utility model provides a kind of plunger variable pump, and this plunger variable pump emptying phenomenon can not take place when starting, and this plunger variable pump has long working life.
To achieve these goals, the utility model provides a kind of plunger variable pump, comprises plunger pump, is used to adjust the stroking mechanism of swashplate angle, also comprises the drive unit that links to each other with described stroking mechanism; Before described plunger variable pump startup, described drive unit is used to drive stroking mechanism, makes described swash plate be in required incident angle.
Preferably, described stroking mechanism is the variable piston, and described variable piston is connected with described swash plate by connecting rod; Described drive unit is the control oil sources, and the oil outlet of described control oil sources is communicated with the control port of described variable piston; Before the plunger variable pump startup, described control oil sources injects control oil in described variable piston.
Preferably, described control oil sources is the oil hydraulic pump that is provided with separately.
Preferably, before described plunger variable pump startup, described drive unit drives stroking mechanism, makes described swash plate be in the position of inclination angle minimum.
The plunger variable pump that the utility model provides also comprises the drive unit that links to each other with stroking mechanism, and before the plunger variable pump startup, this drive unit can drive the stroking mechanism action, and stroking mechanism drives swash plate, makes swash plate be in required incident angle.The plunger variable pump of this structure is before starting, drive stroking mechanism by drive unit earlier, make stroking mechanism adjust the inclination angle of swash plate, make swash plate be in less position, inclination angle, the oil suction of plunger variable pump when starting is not the set solid amount just like this, can avoid plunger variable pump that emptying phenomenon takes place when starting, make plunger variable pump have long working life.
Description of drawings
Fig. 1 is a kind of structural representation of typical plunger variable pump;
Fig. 2 is the working principle schematic representation of plunger variable pump provided by the utility model;
Fig. 3 is the structural representation of a kind of embodiment of plunger variable pump provided by the utility model;
Wherein, among Fig. 1-Fig. 3:
Embodiment
Core of the present utility model provides a kind of plunger variable pump, and this plunger variable pump emptying phenomenon can not take place when starting, and this plunger variable pump has long working life.
In order to make those skilled in the art better understand the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please referring to Fig. 2, Fig. 2 is the working principle schematic representation of plunger variable pump provided by the utility model.
As shown in Figure 2, the plunger variable pump that the utility model provides comprises plunger pump 21, stroking mechanism 22, also comprise drive unit 23, this drive unit 23 is used at plunger variable pump startup front wheel driving stroking mechanism 22, make stroking mechanism 22 adjust the inclination angle of swash plate 12, and then make the swash plate of plunger variable pump be in the position at required inclination angle.
The plunger variable pump that the utility model provides is on the basis of existing plunger variable pump, increased drive unit 23, this drive unit 23 drove stroking mechanism 22 before the plunger variable pump startup, adjust the inclination angle of swash plate by the action of stroking mechanism 22, make the inclination angle of swash plate be in less position, below be example with a kind of concrete stroking mechanism, introduce Variable plunger pump provided by the utility model in detail.
Please referring to Fig. 3, Fig. 3 is the structural representation of a kind of embodiment of plunger variable pump provided by the utility model; For convenience of description, among Fig. 3 with Fig. 1 in identical parts adopt identical reference character.
In a kind of concrete mode of execution, plunger variable pump comprises transmission shaft 11, swash plate 12, plunger pump and stroking mechanism, and plunger pump comprises plunger 13 and cylinder body 14.
One end of transmission shaft 11 is installed on the housing of this plunger variable pump, the other end is installed on the back cover, the side of transmission shaft 11 is provided with the swash plate 12 that can swing, the plunger 13 that can do expanding-contracting action with swash plate 12 successively, and an end of plunger 13 is connected with swash plate 12, and the other end is socketed in the cylinder body 14.Swash plate 12 has certain inclination angle, and this inclination angle is meant the angle between swash plate 12 and transmission shaft 11 are radially.Because swash plate 12 has the inclination angle, when cylinder body 14 rotated under the drive of transmission shaft 11, in certain angle range, plunger 13 can be protruding, and swept volume becomes big in cylinder body 14 cavitys, forms parital vacuum; In another angle range, plunger 13 is pressed to the inside of cylinder body 14 by swash plate 12, makes swept volume diminish, and the fluid in the active chamber is squeezed, and discharges by oil outlet, thereby finishes suction, the oil extraction process of plunger variable pump.
The plunger variable pump delivery is relevant with the size at the inclination angle of swash plate 12, the inclination angle of swash plate 12 is big more, the plunger variable pump delivery is just big more, in order to make the working pressure of plunger variable pump delivery and plunger variable pump adapt, plunger variable pump is provided with stroking mechanism, stroking mechanism is used to adjust the inclination angle of swash plate, and then adjusts the plunger variable pump delivery.
A kind of concrete structure of stroking mechanism as shown in Figure 2, this stroking mechanism is the variable piston, this variable piston comprises piston 151, first cylinder body 152, second cylinder body 153, spring 154 and connecting rod 155, one end of piston 151 is socketed in the cavity of first cylinder body 152, the other end of piston 151 is socketed in the cavity of second cylinder body 153, piston 151 is connected with swash plate 12 by connecting rod 155, be provided with spring 154 between the piston 151 and second cylinder body 152, spring 154 can apply along the axial elastic force of piston 151 piston 151, on the cylinder body of first cylinder body 152, be provided with hydraulic oil port 156, when in first cylinder body 152, injecting hydraulic oil by hydraulic oil port 156, hydraulic oil will promote piston 151 actions, piston 151 will drive swash plate 12 actions by connecting rod 155, make the inclination angle of swash plate 12 obtain adjusting.Hydraulic oil port 156 specifically can be communicated with the actuator port of plunger variable pump, can adjust the inclination angle of swash plate 12 according to the operating oil pressure of plunger variable pump, promptly adjusts the plunger variable pump delivery.
The plunger variable pump that the utility model provides also comprises drive unit, drive unit is connected with stroking mechanism, this drive unit drove stroking mechanism before the plunger variable pump startup, in a kind of concrete mode of execution, described drive unit can be the control oil sources, the oil outlet of control oil sources is communicated with the hydraulic oil port 156 of variable reciprocating pump, before plunger pump starts, described control oil sources injects certain volume and hydraulic oil that have certain pressure in first cylinder body 152 of variable piston, under the pressure effect of hydraulic oil, the stroke of the piston 151 of variable piston will become greatly, and then pass through the inclination angle that connecting rod 155 is adjusted swash plates 12, make the inclination angle of swash plate 12 diminish.
In a kind of concrete mode of execution, described control oil sources can adopt the independent oil hydraulic pump that is provided with, and oil hydraulic pump injects hydraulic oil in second cylinder body 152 of plunger pump startup forward variable piston.
When plunger variable pump does not start, the effect of no hydraulic oil in first cylinder body 152 of variable piston, under the effect of spring 154, piston 151 is positioned at the minimum stroke position, this moment, swash plate 12 was in the inclination angle maximum position, before starting plunger variable pump, start drive unit earlier, when drive unit is the oil hydraulic pump that is provided with separately, start this oil hydraulic pump earlier, this oil hydraulic pump injects hydraulic oil in the cavity of first cylinder body 152 of variable piston, under the pressure effect of hydraulic oil, the stroke of the piston 151 of variable piston will become greatly, and then pass through the inclination angle that connecting rod 155 is adjusted swash plates 12, make the inclination angle of swash plate 12 diminish; Start plunger variable pump, this moment, the swashplate angle of plunger variable pump was less, and the oil suction of plunger variable pump when starting is not the set solid amount just, can avoid plunger variable pump that emptying phenomenon takes place when starting, and made plunger variable pump have long working life.
In the preferred version, can make swash plate 12 be in the position of inclination angle minimum, the oil suction of plunger variable pump when starting is exactly minimum injection rate like this, can more effectively avoid the variable displacement pump emptying phenomenon takes place when starting.
The foregoing description is an example with a kind of stroking mechanism of common plunger variable pump just; introduce plunger variable pump provided by the utility model; be appreciated that all be provided with the drive unit that is connected with stroking mechanism and this drive unit adjust the plunger variable pump at the inclination angle of swash plate at variable piston pump startup front wheel driving stroking mechanism all should be in protection domain of the present utility model.
The above only is the description of the preferred implementation of model utility; should be understood that; because the finiteness of literal expression; and objectively have unlimited concrete structure; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. plunger variable pump comprises plunger pump, is used to adjust the stroking mechanism of swashplate angle, it is characterized in that, also comprises the drive unit that links to each other with described stroking mechanism; Before described plunger variable pump startup, described drive unit is used to drive stroking mechanism, makes described swash plate be in required incident angle.
2. plunger variable pump according to claim 1 is characterized in that, described stroking mechanism is the variable piston, and described variable piston is connected with described swash plate by connecting rod; Described drive unit is the control oil sources, and the oil outlet of described control oil sources is communicated with the control port of described variable piston; Before the plunger variable pump startup, described control oil sources injects control oil in described variable piston.
3. plunger variable pump according to claim 2 is characterized in that, described control oil sources is the oil hydraulic pump that is provided with separately.
4. plunger variable pump according to claim 1 is characterized in that, before described plunger variable pump startup, described drive unit drives stroking mechanism, makes described swash plate be in the position of inclination angle minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201564371U CN201621027U (en) | 2010-03-25 | 2010-03-25 | Variable displacement pump of plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201564371U CN201621027U (en) | 2010-03-25 | 2010-03-25 | Variable displacement pump of plunger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201621027U true CN201621027U (en) | 2010-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201564371U Expired - Fee Related CN201621027U (en) | 2010-03-25 | 2010-03-25 | Variable displacement pump of plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201621027U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798999A (en) * | 2010-03-25 | 2010-08-11 | 三一重型装备有限公司 | Variable stroke plunger pump and starting method thereof |
| CN105829711A (en) * | 2013-12-18 | 2016-08-03 | 舍弗勒技术股份两合公司 | Variable displacement pump |
| CN110594211A (en) * | 2019-08-12 | 2019-12-20 | 大家原油压工业有限公司 | Energy-saving oil pressure control system |
| CN113669221A (en) * | 2021-08-30 | 2021-11-19 | 北京航空航天大学宁波创新研究院 | Load sensitive variable mechanism of variable pump and variable pump |
-
2010
- 2010-03-25 CN CN2010201564371U patent/CN201621027U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798999A (en) * | 2010-03-25 | 2010-08-11 | 三一重型装备有限公司 | Variable stroke plunger pump and starting method thereof |
| CN101798999B (en) * | 2010-03-25 | 2012-05-02 | 三一重型装备有限公司 | Variable stroke plunger pump and starting method thereof |
| CN105829711A (en) * | 2013-12-18 | 2016-08-03 | 舍弗勒技术股份两合公司 | Variable displacement pump |
| CN110594211A (en) * | 2019-08-12 | 2019-12-20 | 大家原油压工业有限公司 | Energy-saving oil pressure control system |
| CN113669221A (en) * | 2021-08-30 | 2021-11-19 | 北京航空航天大学宁波创新研究院 | Load sensitive variable mechanism of variable pump and variable pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20140325 |