CN105257495A - Flow dispersion switch control digital axial plunger pump and control method thereof - Google Patents
Flow dispersion switch control digital axial plunger pump and control method thereof Download PDFInfo
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- CN105257495A CN105257495A CN201510843305.3A CN201510843305A CN105257495A CN 105257495 A CN105257495 A CN 105257495A CN 201510843305 A CN201510843305 A CN 201510843305A CN 105257495 A CN105257495 A CN 105257495A
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Abstract
The invention discloses a flow dispersion switch control digital axial plunger pump and a control method thereof. A plunger pump housing, a rear end cover and a rear end cover plate are connected with one another in sequence in a sealing manner, wherein an oblique disk is mounted at the interior of the plunger pump housing through a first bearing; a main shaft penetrates through the plunger pump housing, the oblique disk, a plunger cavity and a second bearing in sequence; the main shaft is connected with the oblique disk through a key; the plunger is mounted in a sliding boot spherical sleeve; a sliding boot is pressed on the oblique disk and is used for driving the oblique disk to rotate through the main shaft and driving plungers to be subjected to reciprocation motion in the plunger cavity; inlet switch valves are inserted into an oil line connected with an inlet oil passage in the axial direction of the rear end cover; the number of the inlet switch valves is as same as that of the plungers; outlet switch valves are inserted into an oil line connected with an outlet oil passage in the radial direction of the rear end cover; the number of the outlet switch valves is as same as that of the plungers. Through the flow dispersion switch control digital axial plunger pump, the output flow of the flow dispersion switch control digital axial plunger pump can be variably controlled by adjusting the working sequences of the inlet switch valves and the outlet switch valves corresponding to the plungers.
Description
Technical field
The present invention relates to digital hydraulic component technology, especially design a kind of flow discrete switch control figure formula axial piston pump and controlling method thereof.
Background technique
Digital hydraulic technology is a kind of novel hydraulic control technology, is characterized in by adopting switch valve to carry out regulating and controlling to the output flow of element.Only there are two output variables in switch valve, i.e. standard-sized sheet " 1 " and full cut-off " 0 ", by realizing the adjustment of switch valve controlling the discretization of element output flow.When the lifting of switch valve response frequency, can be similar to the mean value of the output flow of discretization and replace traditional successional flow to export.Due to the digital hydraulic based on switch control rule have that switch control rule contamination resistance is strong, processing cost is low simultaneously, the simple advantage of structure and digital control flexibility is high, by strong operability, advantage that integration degree is high, therefore it is an important directions of following hydraulics development.
Simultaneously for oil hydraulic pump element, the Port Plate Pair of traditional variable piston formula oil hydraulic pump also exists serious wear problem, and its stroking mechanism is also particularly complicated simultaneously, very high to the requirement of machining accuracy, makes the cost of traditional variable piston formula oil hydraulic pump higher.By switch valve digital control technology is introduced in axial piston pump field, can simplify its structure, by regulating the Variable Control realizing pump and export to the combination of switch valve, the operability of axial deflection pump can be considerably increased simultaneously.
Summary of the invention
The object of the invention is to design a kind of flow discrete switch control figure formula axial piston pump, by the control to inlet switch valve and gate out switch valve, realize the variable characteristics of axial piston pump.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of flow discrete switch control figure formula axial piston pump comprises plunger pump shell, plunger, plunger cavity, swash plate, main shaft, inlet switch valve, gate out switch valve, rear end cover, piston shoes, key, clutch shaft bearing, the second bearing, rear-end plate;
Plunger pump shell, rear end cover and rear-end plate are tightly connected successively; Swash plate is arranged on plunger pump shell inside by clutch shaft bearing; Main shaft is successively through plunger pump shell, swash plate, plunger cavity and the second bearing; Main shaft is connected with swash plate by key; Plunger is arranged in piston shoes sphere cover; Piston shoes are pressed on swash plate, rotarily drive swash plate and rotate, then drive plunger to realize to-and-fro motion in plunger cavity by main shaft; Rear end cover axial direction and the inlet switch valve oil circuit that import oil duct is connected being fitted with the identical number with plunger number; The oil circuit that rear end cover radial direction is connected with outlet oil duct is fitted with the gate out switch valve of the identical number with plunger number.
Described inlet switch valve, gate out switch valve realize the control to each plunger input flow rate and output flow by Pulse Width Control.Described key is flat key, woodruff key, wedge key, tangent key or spline.The plunger number installed in described plunger pump can be even number also can be odd number.
Preferably, described a kind of flow discrete switch control figure formula axial piston pump also comprises filler opening and oil outlet, and described filler opening and oil outlet are arranged on rear end cover.
The flow control method of described plunger pump is divided into three kinds of modes, and namely full flow exports, composite condition exports and zero delivery exports;
When full flow exports, open whole inlet switch valve during plunger oil suction, during plunger oil extraction, open whole gate out switch valve;
When composite condition exports, determine the plunger number n of oil extraction, plunger pump does not need the plunger number carrying out the output of fluid flow to be m-n, m is plunger sum, when plunger pump oil suction, open whole inlet switch valve, during plunger pump oil extraction, the gate out switch valve opened for n plunger cavity volume of flow output is corresponding makes pump oil extraction, remain the inlet switch valve that m-n plunger then opens its correspondence, make its chamber inner fluid pass back into pump filler opening, realize idling function, with the output flow of this pilot plunger pump;
When zero delivery exports, open whole inlet switch valve during plunger oil suction, open whole inlet switch valve during plunger oil extraction, now plunger pump does not have flow to export.
The beneficial effect that the present invention has is:
1., by regulating the switching sequence of inlet switch valve and gate out switch valve, realize the adjustment to pump output variable;
2. flow discrete switch control figure formula axial piston pump has the advantage that digital control technology controls flexibly, antijamming capability is strong, control characteristic is good;
3. flow discrete switch control figure formula axial piston pump application switch control technique, has the advantage that switching control techniques structure is simple, action is fast, contamination resistance is strong, reliability is high, processing cost is low.
4. instead of the mode of traditional thrust plate control by the mode of switch control rule, effectively improve the working life of plunger pump.
Accompanying drawing explanation
Fig. 1 is flow discrete switch control figure formula axial piston pump structural representation;
Fig. 2 is flow discrete switch control figure formula axial piston pump pump body structure sectional drawing;
Fig. 3 is flow discrete switch control figure formula axial piston pump rear end cover structure schematic diagram;
Fig. 4 is flow discrete switch control figure formula axial plunger method for controlling pump schematic diagram.
In figure: 1, plunger pump shell, 2, plunger, 3, plunger cavity, 4, swash plate, 5, main shaft, 6, inlet switch valve, 7, gate out switch valve, 8, rear end cover, 9, piston shoes, 10, key, 11, clutch shaft bearing, the 12, second bearing, 13, rear-end plate, 14, filler opening, 15, oil outlet.
Embodiment
Below in conjunction with accompanying drawing and instantiation, the invention will be further described, and the present embodiment should not regard limitation of the invention as.
As shown in Figures 1 and 2, a kind of flow discrete switch control figure formula axial piston pump comprises plunger pump shell 1, plunger 2, plunger cavity 3, swash plate 4, main shaft 5, inlet switch valve 6, gate out switch valve 7, rear end cover 8, piston shoes 9, key 10, clutch shaft bearing 11, the second bearing 12, rear-end plate 13;
Plunger pump shell 1, rear end cover 8 and rear-end plate 13 are tightly connected successively; It is inner that swash plate 4 is arranged on plunger pump shell 1 by clutch shaft bearing 11; Main shaft 5 is successively through plunger pump shell 1, swash plate 4, plunger cavity 3 and the second bearing 12; Main shaft 5 is connected with swash plate 4 by key 10; Plunger 2 is arranged in piston shoes 9 sphere cover; Piston shoes 9 are pressed on swash plate 4, rotarily drive swash plate 4 rotate by main shaft 5, then drive plunger 2 to realize to-and-fro motion in plunger cavity 3; Rear end cover 8 axial direction and the inlet switch valve 6 oil circuit that import oil duct is connected being fitted with the identical number with plunger number; The oil circuit that rear end cover 8 radial direction is connected with outlet oil duct is fitted with the gate out switch valve 7 of the identical number with plunger number.
Described inlet switch valve 6, gate out switch valve 7 realize the control to each plunger input flow rate and output flow by Pulse Width Control.Described key 10 is flat key, woodruff key, wedge key, tangent key or spline.The plunger number installed in described plunger pump can be even number also can be odd number.
As shown in Figure 3, preferably, described a kind of flow discrete switch control figure formula axial piston pump also comprises filler opening 14 and oil outlet 15, and described filler opening 14 and oil outlet 15 are arranged on rear end cover 8.
As shown in Figure 4, by regulating the job order to inlet switch valve corresponding to each plunger and gate out switch valve, the Variable Control to flow discrete switch control figure formula axial plunger POF can be realized, the flow control method of plunger pump is divided into three kinds of modes, and namely full flow exports, composite condition exports and zero delivery exports;
When full flow exports, open whole inlet switch valve 6 during plunger 2 oil suction, during plunger 2 oil extraction, open whole gate out switch valve 7;
When composite condition exports, determine the plunger number n of oil extraction, plunger pump does not need the plunger number carrying out the output of fluid flow to be m-n, m is plunger sum, when plunger pump oil suction, open whole inlet switch valve 6, during plunger pump oil extraction, the gate out switch valve 7 opened for n plunger cavity volume of flow output is corresponding makes pump oil extraction, remain the inlet switch valve 6 that m-n plunger then opens its correspondence, make its chamber inner fluid pass back into pump filler opening, realize idling function, with the output flow of this pilot plunger pump;
When zero delivery exports, open whole inlet switch valve 6 during plunger 2 oil suction, open whole inlet switch valve 6 during plunger 2 oil extraction, now plunger pump does not have flow to export.
Claims (6)
1. a flow discrete switch control figure formula axial piston pump, it is characterized in that: comprise plunger pump shell (1), plunger (2), plunger cavity (3), swash plate (4), main shaft (5), inlet switch valve (6), gate out switch valve (7), rear end cover (8), piston shoes (9), key (10), clutch shaft bearing (11), the second bearing (12), rear-end plate (13);
Plunger pump shell (1), rear end cover (8) and rear-end plate (13) are tightly connected successively; It is inner that swash plate (4) is arranged on plunger pump shell (1) by clutch shaft bearing (11); Main shaft (5) is successively through plunger pump shell (1), swash plate (4), plunger cavity (3) and the second bearing (12); Main shaft (5) is connected with swash plate (4) by key (10); Plunger (2) is arranged in piston shoes (9) sphere cover; Piston shoes (9) are pressed on swash plate (4), rotarily drive swash plate (4) and rotate, then drive plunger (2) to realize to-and-fro motion in plunger cavity (3) by main shaft (5); Rear end cover (8) axial direction and the inlet switch valve (6) oil circuit that import oil duct is connected being fitted with the identical number with plunger number; The oil circuit that rear end cover (8) radial direction is connected with outlet oil duct is fitted with the gate out switch valve (7) of the identical number with plunger number.
2. a kind of flow discrete switch control figure formula axial piston pump according to claim 1, is characterized in that: described inlet switch valve (6), gate out switch valve (7) realize the control to each plunger input flow rate and output flow by Pulse Width Control.
3. a kind of flow discrete switch control figure formula axial piston pump according to claim 1, is characterized in that: described key (10) is flat key, woodruff key, wedge key, tangent key or spline.
4. a kind of flow discrete switch control figure formula axial piston pump according to claim 1, is characterized in that: the plunger number installed in described plunger pump can be even number also can be odd number.
5. a kind of flow discrete switch control figure formula axial piston pump according to claim 1, characterized by further comprising filler opening (14) and oil outlet (15), described filler opening (14) and oil outlet (15) are arranged on rear end cover (8).
6. a flow control method for plunger pump as claimed in claim 1, is characterized in that: described flow control method is divided into three kinds of modes, and namely full flow exports, composite condition exports and zero delivery exports;
When full flow exports, open whole inlet switch valve (6) during plunger (2) oil suction, during plunger (2) oil extraction, open whole gate out switch valve (7);
When composite condition exports, determine the plunger number n of oil extraction, plunger pump does not need the plunger number carrying out the output of fluid flow to be m-n, m is plunger sum, when plunger pump oil suction, open whole inlet switch valve (6), during plunger pump oil extraction, the gate out switch valve (7) opened for n plunger cavity volume of flow output is corresponding makes pump oil extraction, remain the inlet switch valve (6) that m-n plunger then opens its correspondence, make its chamber inner fluid pass back into pump filler opening, realize idling function, with the output flow of this pilot plunger pump;
When zero delivery exports, open whole inlet switch valve (6) during plunger (2) oil suction, open whole inlet switch valve (6) during plunger (2) oil extraction, now plunger pump does not have flow to export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510843305.3A CN105257495B (en) | 2015-11-26 | 2015-11-26 | Flow discrete switch controls the control method of Digital axial piston pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510843305.3A CN105257495B (en) | 2015-11-26 | 2015-11-26 | Flow discrete switch controls the control method of Digital axial piston pump |
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| Publication Number | Publication Date |
|---|---|
| CN105257495A true CN105257495A (en) | 2016-01-20 |
| CN105257495B CN105257495B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510843305.3A Active CN105257495B (en) | 2015-11-26 | 2015-11-26 | Flow discrete switch controls the control method of Digital axial piston pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302000A (en) * | 2017-12-30 | 2018-07-20 | 孟庆仕 | A kind of inclined disc type oscillating plunger pump of balanced radial force |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1131121A (en) * | 1966-01-25 | 1968-10-23 | Marwin Machine Tools Ltd | Hydraulic motor control |
| DE102009015323A1 (en) * | 2009-03-27 | 2010-09-30 | Robert Bosch Gmbh | Control valve i.e. seat valve, for use in swash plate type-axial piston machine, has valve body controlling pressurizing medium connection to displacement body area, where position and/or length of body are detectable |
| CN202031821U (en) * | 2011-03-25 | 2011-11-09 | 杭州佳湖科技有限公司 | Axial plunger pump for valve-type deep well |
| CN105041782A (en) * | 2015-06-25 | 2015-11-11 | 西安交通大学 | Numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control |
-
2015
- 2015-11-26 CN CN201510843305.3A patent/CN105257495B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1131121A (en) * | 1966-01-25 | 1968-10-23 | Marwin Machine Tools Ltd | Hydraulic motor control |
| DE102009015323A1 (en) * | 2009-03-27 | 2010-09-30 | Robert Bosch Gmbh | Control valve i.e. seat valve, for use in swash plate type-axial piston machine, has valve body controlling pressurizing medium connection to displacement body area, where position and/or length of body are detectable |
| CN202031821U (en) * | 2011-03-25 | 2011-11-09 | 杭州佳湖科技有限公司 | Axial plunger pump for valve-type deep well |
| CN105041782A (en) * | 2015-06-25 | 2015-11-11 | 西安交通大学 | Numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302000A (en) * | 2017-12-30 | 2018-07-20 | 孟庆仕 | A kind of inclined disc type oscillating plunger pump of balanced radial force |
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| Publication number | Publication date |
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| CN105257495B (en) | 2018-08-21 |
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