CN105822536A - Self-control type secondary variable control structure of plunger pump - Google Patents
Self-control type secondary variable control structure of plunger pump Download PDFInfo
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- CN105822536A CN105822536A CN201610247238.3A CN201610247238A CN105822536A CN 105822536 A CN105822536 A CN 105822536A CN 201610247238 A CN201610247238 A CN 201610247238A CN 105822536 A CN105822536 A CN 105822536A
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- variable
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- adjusting bolt
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to a self-control type secondary variable control structure of a plunger pump. The self-control type secondary variable control structure comprises a pump body and a variable piston, the pump body is hollow and is provided with the variable piston in a transversely-sliding manner, the two ends of the pump body are sealed through a variable flange A and a variable flange B, an adjusting swivel nut A is in threaded connection to the center of the outer side end of the variable flange A, and an adjusting swivel nut B is in threaded connection to the center of the outer side end of the variable flange B; and one end of the variable piston is a large-diameter end, the other end of the variable piston is a small-diameter end, the large-diameter end of the variable piston extends to the variable flange A, the small-diameter of the variable piston extends into the variable flange B to be connected with the adjusting swivel nut B through a pre-tensioning spring, and an inner cavity of the variable flange A and an inner cavity of the variable flange B are communicated with an oil inlet runner in the pump body. The self-control type secondary variable control structure is simple and reliable, functional requirements for quick dropping, slow dropping, pressure maintaining, slow rising and quick rising of an oil press can be met; and by replacing critical parts, function switching points are adjusted, and the independence of clients is improved.
Description
Technical field
The present invention relates to Variable plunger pump field, particularly relate to the Self-controlling secondary Variable Control structure of a kind of plunger displacement pump.
Background technology
At present, in Hydraulic Industry, the complete job flow process of a lot of press is: fast lower slow lower pressurize is gone up on fast slowly.In the hydraulic system scheme of these press, main pump is essentially axial plunger pump, and its variable format is broadly divided into 2 big classes: one is to select constant pressure pump, and two is to select constant output pump.Both pumps the most all only have fast under, pressurize, fast on.Realizing slow lower or go up function slowly, can only pass through overflow valve by unwanted oil by overflowing back fuel tank, substantial amounts of heat energy taken away by the oil that so this part is unnecessary, i.e. shows as wasting electric energy.
Under current form, many design of Hydraulic System, manufacturer are by device energy conservation, environmental protection, and reliability is as total guiding principle of hydraulic test, so axial plunger pump manufacturer proposes requirements at the higher level: reliable, energy-conservation, meet functions of the equipments needs.
Summary of the invention
The technical problem to be solved is to provide the Self-controlling secondary Variable Control structure of a kind of plunger displacement pump, simple and reliable for structure, can meet hydraulic press fast under, slow under, pressurize, slow these Functional Requirements upper upper, fast, and adjust function switching point by changing vital part, improve the autonomy of client.
The technical solution adopted for the present invention to solve the technical problems is: provide the Self-controlling secondary Variable Control structure of a kind of plunger displacement pump, including the pump housing and variable piston, described pump body hollow and slide laterally and be disposed with variable piston, the two ends of the described pump housing are sealed by variable flange A and variable flange B, described variable flange A and the outboard end of variable flange B are the most threaded Adjusting bolt Adjusting screw A and Adjusting bolt Adjusting screw B, one end of described variable piston is bigger diameter end, the other end is miner diameter end, its bigger diameter end extend in variable flange A, it is connected with Adjusting bolt Adjusting screw B in its miner diameter end extend into variable flange B and by preloading spring, described variable flange A is connected with the oil-feed runner in the pump housing with the inner chamber of variable flange B.
Supplementing as to the one of technical solutions according to the invention, be laterally installed with regulation screw in described Adjusting bolt Adjusting screw B, described preloading spring is enclosed within the outside of regulation screw.
Supplement as to the one of technical solutions according to the invention, on described regulation screw, one end of being positioned at Adjusting bolt Adjusting screw B be socketed with locking nut B.
Further, it is positioned on the Adjusting bolt Adjusting screw A outside variable flange A and variable flange B end face and Adjusting bolt Adjusting screw B and is all socketed with locking nut A.
Further, described Adjusting bolt Adjusting screw A and the outer free end of Adjusting bolt Adjusting screw B being all socketed with top cover nut, described top cover nut withstands with the end face of locking nut A.
Further, the fit clearance between described variable piston and variable flange A and variable flange B is 0.015～0.025mm.
Beneficial effect
The present invention relates to the Self-controlling secondary Variable Control structure of a kind of plunger displacement pump, simple and reliable for structure, by arranging the equilibrium point that variable piston slides, and the P value of load with equilibrium point is compared, thus the switching of various function is realized by the oriented sliding of variable piston, it is thus possible to meet hydraulic press fast under, slow under, pressurize, slow these Functional Requirements upper upper, fast, and adjust function switching point by changing vital part, improve the autonomy of client, energy consumption can also be substantially reduced, save electric energy.
Accompanying drawing explanation
Fig. 1 be the present invention partly cut open topology view；
Fig. 2 is the performance diagram of the present invention；
Fig. 3 is the use structure graph of this patent.
Diagram: 1, top cover nut；2, Adjusting bolt Adjusting screw A；3, locking nut A；4, variable flange A；5, variable piston；6, the pump housing；7, preloading spring；8, regulation screw；9, Adjusting bolt Adjusting screw B；10, variable flange B；11, locking nut B；12, oil-feed runner.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention rather than limit the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.
nullAs Figure 1-3，Embodiments of the present invention relate to the Self-controlling secondary Variable Control structure of a kind of plunger displacement pump，Including the pump housing 6 and variable piston 5，It is characterized in that，The described pump housing 6 inner hollow and slide laterally and be disposed with variable piston 5，The two ends of the described pump housing 6 are sealed by variable flange A4 and variable flange B10，Described variable flange A4 and the outboard end of variable flange B10 are the most threaded Adjusting bolt Adjusting screw A2 and Adjusting bolt Adjusting screw B9，One end of described variable piston 5 is bigger diameter end，The other end is miner diameter end，Its bigger diameter end extend in variable flange A4，It is connected with Adjusting bolt Adjusting screw B9 in its miner diameter end extend into variable flange B10 and by preloading spring 7，Described variable flange A4 is connected with the oil-feed runner 12 in the pump housing 6 with the inner chamber of variable flange B10.
Use principle as the present invention, a diameter of D1 of the bigger diameter end of variable piston 5 here, a diameter of D2 of miner diameter end, and the spring force of preloading spring 7 is F, during variable piston 5 equilibrium point in an intermediate position, its bigger diameter end and miner diameter end pressure experienced should be equal, therefore can draw below equation according to the principle of dynamic balance:
Here P is variable piston 5 pressure that its two ends are subject to when balancing, and owing to oil-feed runner 12 communicates with variable flange A4 and variable flange B10 simultaneously, therefore the pressure that the bigger diameter end of variable piston 5 and miner diameter end are subject to is equal；
According to formula above it follows that
Therefore in the case of variable piston 5 is constant, the spring force F of preloading spring 7 determines the equilibrium pressure at variable piston 5 two ends.
In actual moving process, as the actual loading P of plunger displacement pump0< during P, the variable piston 5 left end in Fig. 1 moves, and rotates other mechanisms in pump by the link gear in pump, it is achieved plunger huge discharge works, be reacted on press then for fast lower or fast on functional realiey；
Work as load P0> P time, the variable piston 5 right-hand member in Fig. 1 moves, and rotates other mechanisms in pump by the link gear in pump, and plunger displacement pump automatically switches to small displacement work, be reacted on press then under slow, the slow fast upper or realization of pressure holding function.
When press pressurize, P0> P, plunger automatically switches to small displacement work.So only have the hydraulic oil of small displacement through overflow valve oil sump tank, one can find out the electric energy saving 85% from the characteristic curve of Fig. 2.
Supplement as to the one of technical solutions according to the invention, regulation screw 8 laterally it is installed with in described Adjusting bolt Adjusting screw B9, described preloading spring 7 is enclosed within the outside of regulation screw 8, the position of regulation screw 8 can be adjusted by rotating regulation screw 8, due to variable piston 5 move right on earth when withstand with regulation screw 8, therefore the position adjusting regulation screw 8 can arrange the minimum injection rate of plunger displacement pump.
Supplement as to the one of technical solutions according to the invention, on described regulation screw 8, one end of being positioned at Adjusting bolt Adjusting screw B9 be socketed with locking nut B11, the position of regulation screw 8 can be locked by tightening locking nut B11, prevent it from rotating voluntarily.
Further, it is positioned on the Adjusting bolt Adjusting screw A2 outside variable flange A4 and variable flange B10 end face and Adjusting bolt Adjusting screw B9 and is all socketed with locking nut A3, the position of Adjusting bolt Adjusting screw A2 and Adjusting bolt Adjusting screw B9 can be locked, the position locking of Adjusting bolt Adjusting screw A2, it can also be ensured that the maximum pump discharge of plunger displacement pump is constant.
Further, described Adjusting bolt Adjusting screw A2 and the outer free end of Adjusting bolt Adjusting screw B9 being all socketed with top cover nut 1, described top cover nut 1 withstands with the end face of locking nut A3, the hydraulic oil seepage that top cover nut 1 is prevented from the pump housing.
Further, the fit clearance between described variable piston 5 and variable flange A4 and variable flange B10 is 0.015～0.025mm, and such gap can ensure that variable piston 5 can move left and right, without bite phenomenon.
Variant structural of the present invention is simple and reliable, by arranging the equilibrium point that variable piston slides, and the P value of load with equilibrium point is compared, thus the switching of various function is realized by the oriented sliding of variable piston, it is thus possible to meet hydraulic press fast under, slow under, pressurize, slow these Functional Requirements upper upper, fast, and adjust function switching point by changing vital part, improve the autonomy of client, energy consumption can also be substantially reduced, save electric energy.
Claims (6)
- null1. the Self-controlling secondary Variable Control structure of a plunger displacement pump，Including the pump housing (6) and variable piston (5)，It is characterized in that，The described pump housing (6) inner hollow and slide laterally and be disposed with variable piston (5)，The two ends of the described pump housing (6) are sealed by variable flange A (4) and variable flange B (10)，Described variable flange A (4) and the outboard end of variable flange B (10) are the most threaded Adjusting bolt Adjusting screw A (2) and Adjusting bolt Adjusting screw B (9)，One end of described variable piston (5) is bigger diameter end，The other end is miner diameter end，Its bigger diameter end extend in variable flange A (4)，It is connected with Adjusting bolt Adjusting screw B (9) in its miner diameter end extend into variable flange B (10) and by preloading spring (7)，Described variable flange A (4) is connected with the oil-feed runner (12) in the pump housing (6) with the inner chamber of variable flange B (10).
- The Self-controlling secondary Variable Control structure of plunger displacement pump the most according to claim 1, it is characterized in that: be laterally installed with regulation screw (8) in described Adjusting bolt Adjusting screw B (9), described preloading spring (7) is enclosed within the outside of regulation screw (8).
- The Self-controlling secondary Variable Control structure of plunger displacement pump the most according to claim 2, it is characterised in that: described regulation screw (8) is gone up, is positioned at one end of Adjusting bolt Adjusting screw B (9) and is socketed with locking nut B (11).
- The Self-controlling secondary Variable Control structure of plunger displacement pump the most according to claim 1, it is characterised in that: it is positioned on the Adjusting bolt Adjusting screw A (2) outside variable flange A (4) and variable flange B (10) end face and Adjusting bolt Adjusting screw B (9) and is all socketed with locking nut A (3).
- The Self-controlling secondary Variable Control structure of plunger displacement pump the most according to claim 4, it is characterized in that: be all socketed with top cover nut (1) on described Adjusting bolt Adjusting screw A (2) and the outer free end of Adjusting bolt Adjusting screw B (9), described top cover nut (1) withstands with the end face of locking nut A (3).
- The Self-controlling secondary Variable Control structure of plunger displacement pump the most according to claim 1, it is characterised in that: the fit clearance between described variable piston (5) and variable flange A (4) and variable flange B (10) is 0.015～0.025mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610247238.3A CN105822536B (en) | 2016-04-20 | 2016-04-20 | A kind of Self-controlling secondary Variable Control structure of plunger pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610247238.3A CN105822536B (en) | 2016-04-20 | 2016-04-20 | A kind of Self-controlling secondary Variable Control structure of plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN105822536A true CN105822536A (en) | 2016-08-03 |
| CN105822536B CN105822536B (en) | 2018-09-07 |
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| CN201610247238.3A Active CN105822536B (en) | 2016-04-20 | 2016-04-20 | A kind of Self-controlling secondary Variable Control structure of plunger pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630461A (en) * | 2019-09-24 | 2019-12-31 | 邵玉强 | Variable radial plunger pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS541404A (en) * | 1977-06-06 | 1979-01-08 | Kenji Kanamasu | Delivery volume pressure variable plunger pump |
| CN101319666A (en) * | 2008-07-09 | 2008-12-10 | 宁波恒力液压机械制造有限公司 | Unidirectional hydraulic axial variable displacement plunger pump |
| US20090097998A1 (en) * | 2007-10-10 | 2009-04-16 | The Coca-Cola Company | Fixed Displacement Pump |
| CN102338077A (en) * | 2011-09-29 | 2012-02-01 | 宁波明和力盛液压科技有限公司 | SM stepless variable piston pump |
| CN202789837U (en) * | 2012-03-28 | 2013-03-13 | 宁波明和力盛液压科技有限公司 | Variable oil cylinder with glyd ring |
| CN205714707U (en) * | 2016-04-20 | 2016-11-23 | 宁波明和力盛液压科技有限公司 | A kind of Self-controlling secondary Variable Control structure of plunger displacement pump |
-
2016
- 2016-04-20 CN CN201610247238.3A patent/CN105822536B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS541404A (en) * | 1977-06-06 | 1979-01-08 | Kenji Kanamasu | Delivery volume pressure variable plunger pump |
| US20090097998A1 (en) * | 2007-10-10 | 2009-04-16 | The Coca-Cola Company | Fixed Displacement Pump |
| CN101319666A (en) * | 2008-07-09 | 2008-12-10 | 宁波恒力液压机械制造有限公司 | Unidirectional hydraulic axial variable displacement plunger pump |
| CN102338077A (en) * | 2011-09-29 | 2012-02-01 | 宁波明和力盛液压科技有限公司 | SM stepless variable piston pump |
| CN202789837U (en) * | 2012-03-28 | 2013-03-13 | 宁波明和力盛液压科技有限公司 | Variable oil cylinder with glyd ring |
| CN205714707U (en) * | 2016-04-20 | 2016-11-23 | 宁波明和力盛液压科技有限公司 | A kind of Self-controlling secondary Variable Control structure of plunger displacement pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630461A (en) * | 2019-09-24 | 2019-12-31 | 邵玉强 | Variable radial plunger pump |
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| CN105822536B (en) | 2018-09-07 |
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Denomination of invention: An automatic control secondary variable control structure of plunger pump Effective date of registration: 20210828 Granted publication date: 20180907 Pledgee: Ningbo Beilun Rural Commercial Bank Co.,Ltd. qijiashan sub branch Pledgor: NINGBO MINGHE LISHENG HYDRAULIC TECHNOLOGY Co.,Ltd. Registration number: Y2021980008515 |