CN108457829A - A kind of band unloading starts the Variable plunger pump of control function - Google Patents
A kind of band unloading starts the Variable plunger pump of control function Download PDFInfo
- Publication number
- CN108457829A CN108457829A CN201710088331.9A CN201710088331A CN108457829A CN 108457829 A CN108457829 A CN 108457829A CN 201710088331 A CN201710088331 A CN 201710088331A CN 108457829 A CN108457829 A CN 108457829A
- Authority
- CN
- China
- Prior art keywords
- pump
- control valve
- variable
- plunger pump
- control function
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
-
- 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
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/03—Stopping, starting, unloading or idling control by means of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The Variable plunger pump for starting control function is unloaded the invention discloses a kind of band.It includes pump case, and pump ontology and variable cylinder are equipped in the pump case；Further include a control valve, the variable cylinder is connect by the control valve with hydraulic oil source.When the control valve must not be in electricity condition, the pump ontology is in minimum injection rate operating mode；When the control valve be in electricity condition when, the pump ontology is in maximum pump discharge operating mode.The control valve is two-position four-way control valve.The control valve is fixed by screws on the pump case.The present invention is not necessarily to add the off-load startup control function that Variable plunger pump can be realized in relief circuit, and so that entire hydraulic system structure is simpler, overall cost is relatively low.
Description
Technical field
The present invention relates to a kind of Variable plunger pumps, and in particular to a kind of band unloading starts the Variable plunger pump of control function.
Background technology
Plunger pump is the dynamical element in hydraulic system, and the pressure of liquid is provided for the executive component into hydraulic system
Can, i.e., the hydraulic oil of certain flow is exported to executive component, the pressure energy of the liquid is converted to mechanical energy by executive component, is driven
Straight reciprocating motion or rotary motion are made in load.Wherein, plunger pump is divided into quantitative plunger pump and Variable plunger pump.
As shown in figure 3, in order to realize that the unloading of quantitative plunger pump starts control, it need to be in the bypass parallel connection of quantitative plunger pump 6
The unloading valve 7 of one big promoting menstruation, borrows the unloading valve off-load when hydraulic system starts.But such control mode not only makes
Hydraulic system structure is complicated, and easily goes wrong.
And existing Variable plunger pump mostly uses the oil pump capacity that electric proportional control mode controls Variable plunger pump so that variable
The The hydraulic oil that plunger pump is exported is the flow needed for user.But such control mode need to add controller and displacement sensor
Equal components, cause the manufacturing cost of Variable plunger pump higher.
Invention content
The purpose of the present invention is to provide a kind of Variable plunger pumps starting control function with off-load, to solve the prior art
Shortcoming.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of band unloading starts the Variable plunger pump of control function, including pump case, and pump ontology and change are equipped in the pump case
Measure cylinder；Further include a control valve, the variable cylinder is connect by the control valve with hydraulic oil source.
Further, when the control valve must not be in electricity condition, the pump ontology is in minimum injection rate operating mode；When described
Control valve be in electricity condition when, the pump ontology is in maximum pump discharge operating mode.
Preferably, the control valve is two-position four-way control valve.
Further, the control valve is fixed by screws on the pump case.
For the present invention by using above structure, the off-load that Variable plunger pump can be realized without adding relief circuit starts control
Function processed, and make entire hydraulic system structure simpler, overall cost is relatively low.
Description of the drawings
Fig. 1 is the structure principle chart of the present invention.
Fig. 2 is the shape assumption diagram of the present invention.
Fig. 3 is that the unloading of existing quantitative plunger pump starts control principle drawing.
In figure：
1-pump case；2-pump ontologies；3-variable cylinders；4-control valves；5-screws；6-quantitative plunger pumps；7-off-loads
Valve.
The present invention is described in further details in conjunction with drawings and examples.
Specific implementation mode
As shown in Figure 1, a kind of band unloading of the present invention starts the Variable plunger pump of control function, include mainly pump case
1 and control valve 4.Pump ontology 2 and variable cylinder 3 are equipped in pump case.Control valve 4 is two-position four-way control valve, and solid by screw 5
It is scheduled on pump case 1.The rodless cavity and rod chamber of variable cylinder 3 are connect by the control valve 4 with hydraulic oil source.
The course of work of the present invention is as follows：
When needing off-load to start, make control valve that must not be in electricity condition, system hydraulic oil is through control valve entering variable cylinder
Rodless cavity so that change gauge rod is in left end, at this time pump ontology be in minimum injection rate operating mode, i.e. off-load.
When needing fully loaded output, control valve is set to be in obtain electricity condition, system hydraulic oil is through control valve entering variable bar
Rod chamber makes change gauge rod be in right end, pumps ontology at this time and is in maximum pump discharge operating mode, pumps fully loaded output.
Claims (4)
1. a kind of band unloading starts the Variable plunger pump of control function, including pump case, pump ontology and variable are equipped in the pump case
Cylinder, which is characterized in that further include a control valve, the variable cylinder is connect by the control valve with hydraulic oil source.
2. a kind of band unloading according to claim 1 starts the Variable plunger pump of control function, which is characterized in that when described
Control valve must not be in electricity condition when, the pump ontology is in minimum injection rate operating mode；When the control valve be in electricity condition when,
The pump ontology is in maximum pump discharge operating mode.
3. a kind of band unloading according to claim 2 starts the Variable plunger pump of control function, which is characterized in that the control
Valve processed is two-position four-way control valve.
4. a kind of band unloading according to any one of claims 1 to 3 starts the Variable plunger pump of control function, feature exists
In the control valve is fixed by screws on the pump case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088331.9A CN108457829A (en) | 2017-02-17 | 2017-02-17 | A kind of band unloading starts the Variable plunger pump of control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088331.9A CN108457829A (en) | 2017-02-17 | 2017-02-17 | A kind of band unloading starts the Variable plunger pump of control function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108457829A true CN108457829A (en) | 2018-08-28 |
Family
ID=63221813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710088331.9A Pending CN108457829A (en) | 2017-02-17 | 2017-02-17 | A kind of band unloading starts the Variable plunger pump of control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108457829A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2751157Y (en) * | 2004-12-10 | 2006-01-11 | 徐绳武 | Electromagnetic valve unloading constant pressure variable pump |
| CN104314784A (en) * | 2014-10-23 | 2015-01-28 | 宁波广天赛克思液压有限公司 | Power control mechanism integrated in housing of hydraulic pump |
| KR20160074134A (en) * | 2014-12-18 | 2016-06-28 | 두산디에스티주식회사 | Hydraulic pump |
| CN205578199U (en) * | 2016-04-13 | 2016-09-14 | 广东科达洁能股份有限公司 | Variable plunger pump |
| CN206522220U (en) * | 2017-02-17 | 2017-09-26 | 佛山市科达液压机械有限公司 | A kind of band unloading starts the Variable plunger pump of control function |
-
2017
- 2017-02-17 CN CN201710088331.9A patent/CN108457829A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2751157Y (en) * | 2004-12-10 | 2006-01-11 | 徐绳武 | Electromagnetic valve unloading constant pressure variable pump |
| CN104314784A (en) * | 2014-10-23 | 2015-01-28 | 宁波广天赛克思液压有限公司 | Power control mechanism integrated in housing of hydraulic pump |
| KR20160074134A (en) * | 2014-12-18 | 2016-06-28 | 두산디에스티주식회사 | Hydraulic pump |
| CN205578199U (en) * | 2016-04-13 | 2016-09-14 | 广东科达洁能股份有限公司 | Variable plunger pump |
| CN206522220U (en) * | 2017-02-17 | 2017-09-26 | 佛山市科达液压机械有限公司 | A kind of band unloading starts the Variable plunger pump of control function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106351813B (en) | The inclined disc type electric ratio axial plunger pump of compact and its control method | |
| CN201836132U (en) | Pressurization system of three-way pipe forming machine | |
| US20180080442A1 (en) | Displacement pump and control system | |
| CN203743127U (en) | Hydraulic system for engineering oil cylinder durability test | |
| CN107664118A (en) | A kind of hydraulic planger pump of a variety of Variable Control functions of band | |
| CN206522220U (en) | A kind of band unloading starts the Variable plunger pump of control function | |
| CN108457829A (en) | A kind of band unloading starts the Variable plunger pump of control function | |
| CN103994042A (en) | Piston type hydraulic pump with crank connecting rod structure | |
| CN101270742B (en) | Constant power stand-to automatic control axial plunger pump | |
| CN104006040A (en) | Multi-channel hydraulic power flow coupling and matching system | |
| US11466705B2 (en) | Hydraulic unit with combined pneumatic/servomotor action and related use | |
| CN208397033U (en) | A kind of hydraulic system and baling press | |
| CN208858545U (en) | A kind of Electro-hydraulic Proportional Control pump jointly controlled using proportioning valve, miniature high-speed digital valve | |
| CN207526683U (en) | A kind of novel gear type variable oil pump | |
| CN202900560U (en) | Pressure compensation device for oil hydraulic ceramic plunger mud pumps | |
| CN212225635U (en) | Pressurizing oil cylinder | |
| CN204419745U (en) | Pressure filter hydraulic system | |
| CN104653526A (en) | Hydraulic system capable of eliminating reversing pressure jump of servo valve control asymmetric cylinder system | |
| CN204663785U (en) | A kind of oil hydraulic pump | |
| CN102913498B (en) | A kind of energy saver of filter press hydraulic planger pump | |
| DK2902628T3 (en) | LOW SPEED HEAVY LOADED HYDRAULIC PUMP PUMP WITH VARIABLE SCOPE | |
| Chen et al. | Study on new control system of electro-hydraulic proportional valve-control fast forging press | |
| CN202520475U (en) | Hydraulic motor based on digital flow distribution and speed regulation | |
| CN103541941B (en) | The many machining device hydraulic systems of many pumps that a kind of total output controls | |
| CN103032393A (en) | Quasi-static loading hydraulic pump servo control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180828 |