CN101230821A - Plunger pump - Google Patents
Plunger pump Download PDFInfo
- Publication number
- CN101230821A CN101230821A CNA2007100513479A CN200710051347A CN101230821A CN 101230821 A CN101230821 A CN 101230821A CN A2007100513479 A CNA2007100513479 A CN A2007100513479A CN 200710051347 A CN200710051347 A CN 200710051347A CN 101230821 A CN101230821 A CN 101230821A
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- plunger
- valve
- pressure oil
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- oil
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Abstract
The invention relates to a plunger pump. A sensing plug, an ECU, a solenoid pilot actuated valve and a pressure control valve are not used in the invention, and only using an automatic valve for communicating high-pressure oil and low-pressure oil in the pump can control the pressure of the high-pressure oil in a set range. The invention has the advantages of simple structure, few used materials and energy conservation.
Description
Affiliated technical field
The present invention relates to a kind of pressure accumulation type rail plunger pump altogether
Background technique
At present, the known pressure accumulation type characteristics of rail plunger pump altogether is: the camshaft that bent axle drives in the pump housing rotates together with cam, and three plunger bushing is 120 degree and is arranged in the pump housing, and the piston spring cover is pressed on the plunger bushing, and its other end is pressed in plunger on the cam; The blade type low pressure pump of pump housing front end is pressed into the low pressure oil after pressurizeing in the plunger bushing by oiling valve.The cam poker piston is up, the up oiling valve of closing of valve block of rushing to summit of the pressure oil in the plunger bushing, and the steel ball of rushing to summit then is up, opens outlet valve, and pressure oil enters in the common rail pipe of zone of high pressure.The cam rotation, spring and pressure oil compressing plunger are descending, and steel ball falls after rise, and outlet valve cuts out, and low pressure oil punching press valve block is descending, and low pressure oil enters plunger bushing and carries out the circulation of next pressure oil.The zone of high pressure is connected with induction plug and pressure controlled valve, and a cut-off valve is installed on the pump housing.After induction plug passes to ECU (computer) to the force value of high pressure oil, ECU can be when force value reaches setting value, switch on to cut-off valve, the valve block of an oiling valve of cut-off valve drive pin ejection is descending, this oiling valve can not cut out, and when the up pressure of plunger was oily, pressure oil was back to low pressure area by this oiling valve, reduce the pressure oil mass of oil pump, the oil pressure of keeping the zone of high pressure is stable.When the oil pressure in the zone of high pressure was lower than setting value, ECU cut off the power supply to cut-off valve, and the cut-off valve releases pin nails on row, and oiling valve can free switch, and plunger is got back to the oily process of normal pressure.When the oil pressure in the zone of high pressure surpassed setting value, ECU can open pressure controlled valve, makes the oil of zone of high pressure flow back into fuel tank, and when oil pressure was got back to setting value, ECU can close pressure controlled valve.Its deficiency is induction plug, ECU, cut-off valve and pressure controlled valve to be installed guarantee that the oil pressure of zone of high pressure is stable, causes its cost height, uses the many and big shortcoming of power consumption of material, and high pressure oil causes power waste through pressure controlled valve backflow fuel tank simultaneously.
Summary of the invention
In order to overcome existing pressure accumulation type rail plunger pump altogether, the deficiency that needs that multiple arrangement is installed and cause power waste and power consumption easily, the invention provides a kind of plunger pump, it can overcome above deficiency, and the oil pressure that can control high pressure oil again automatically is stabilized in the scope of setting.
The technical solution adopted for the present invention to solve the technical problems is: low pressure oil, oiling valve, plunger bushing, plunger, cam are installed in series successively in the pump housing, outlet valve one end communicates with plunger, the other end communicates with high pressure oil, passage is suitable for reading to communicate with high pressure oil, end opening communicates with low pressure oil, cylinder in the high pressure oil compressing passage is descending together with pedestal, and on oiling valve, pedestal ejection simultaneously valve block is descending length of spring compressed for pedestal.Low pressure oil is washed the valve block of oiling valve open, enters in the plunger bushing, and plunger is pressed on the cam.It is up that external force drives the cam poker piston, the up oiling valve of closing of pressure oil ejection valve block, and the steel ball that pressure oil is washed outlet valve open enters high pressure oil area.The cam rotation, pressure oil compressing plunger is descending, and steel ball falls after rise closes outlet valve, and low pressure oil is washed oiling valve open ..., so circulation.When the cylinder in the pressure compression passage of high pressure oil area was descending together with pedestal, pedestal was pressed on the valve block, and oiling valve can not cut out, and the oil of being pressed when plunger is up is back to the low pressure oil district through oiling valve.Separate with valve block when spring ejection pedestal is up, make oiling valve can free switch after, plunger presses oil to return the normal circulation process.
The invention has the beneficial effects as follows that plunger pump just can be controlled opening or closing of oiling valve automatically without induction plug, ECU, solenoid valve and pressure controlled valve, the pressure stability of control high pressure oil is in the scope of setting.The present invention is simple in structure, few, the energy saving of use material.
Description of drawings
Accompanying drawing is the cross-sectional schematic of the embodiment of the invention.
1. holes, 2. springs, 3. pedestals, 4. passages, 5. pump housings, 6. valve blocks among the figure
7. guiding gutter 8. plunger bushings
Embodiment
As shown in drawings: the pump housing is bolted on the motor with three, and three plunger bushing is 120 degree angles and is tightened in the pump housing, and plunger bushing is up-thin-low-thick, and the platform at middle part is pressed in oiling valve in the pump housing, between this platform and the pump housing copper washer is arranged; Between the Hexagon of bottom and the pump housing cushion rubber is arranged; Be shaped on screw thread between the platform of plunger bushing and the Hexagon.Be shaped on circular groove in the plunger bushing, cushion rubber is arranged in the groove, the top of groove connects porose, and this hole communicates with spill pipe.The plunger bushing bottom be shaped on identical coupling symbol above the plunger respectively, plunger is a cylindrical body; Being shaped on tired line in the cam is tightened on the bent axle and fixes with pin.The oiling valve bottom is shaped on circular groove, and this groove inwardly communicates with three guiding gutter of oiling valve bottom, outwards communicates with the oil duct of outlet valve; Between the hole at oiling valve top and the plunger bushing valve block is arranged, the circumference of valve block has five road oil grooves.Suitable for reading and the high pressure oil of passage communicates, and end opening communicates with low pressure oil; Piston (piston is made with engineering plastics) and cylinder are arranged in the passage, and cylinder and pedestal are made one, and base bottom is made cross; Spring on oiling valve and the spacer is pressed in pedestal in the pump housing.The steel ball of outlet valve communicates with high pressure oil, and the spring on the steel ball heads on packing ring.The four-way pipe that common rail pipe connected is connected on the external tapping of three high pressure oil of the pump housing by nut respectively, and the packing ring at external tapping place can stop steel ball too up.Motor-drive pump is sent low pressure oil three low pressure oil district of the pump housing to by a four-way pipe, and low pressure oil is passed the criss-cross axle of spring and pedestal bottom, washes valve block open, enters in the plunger bushing from the oil groove of valve block circumference.When plunger was up, pressure oil was closed oiling valve, and pass guiding gutter, circular groove, the oil duct steel ball of rushing to summit along the gap of oiling valve and plunger bushing up, enters high pressure oil area.
Claims (10)
1. plunger pump, low pressure oil, oiling valve, plunger bushing, plunger, cam are installed in series successively in the pump housing, outlet valve one end communicates with plunger, the other end communicates with high pressure oil, it is characterized in that passage is suitable for reading communicates with high pressure oil, and end opening communicates with low pressure oil, and the cylinder in the high pressure oil compressing passage is descending together with pedestal, on oiling valve, pedestal ejection simultaneously valve block is descending length of spring compressed for pedestal.
2. plunger pump according to claim 1 is characterized in that the platform of plunger pump is pressed in oiling valve in the pump housing, and the bottom of oiling valve is shaped on guiding gutter.
3. according to claim 1,2 described plunger pumps, it is characterized in that plunger bushing is up-thin-low-thick, there is platform at the middle part, and the bottom is a polygonal, is shaped on screw thread between platform and polygonal, and this plunger bushing is connected with the pump housing by screw thread.
4. according to claim 1,2 described plunger pumps, it is characterized in that on the cylindrical of oiling valve circular groove being arranged, circular groove inwardly communicates with guiding gutter, outwards communicates with the oil duct of outlet valve.
5. according to claim 1,2 described plunger pumps, it is characterized in that the plunger in the plunger bushing is a cylindrical body.
6. according to claim 1,2 described plunger pumps, it is characterized in that the piston that the useful engineering plastics in cylinder top are made in the passage.
7. according to claim 1,2 described plunger pumps, it is characterized in that being shaped on oil groove on the valve block of oiling valve.
8. according to claim 1,2 described plunger pumps, it is characterized in that base bottom has groove.
9. according to claim 1,2 described plunger pumps, it is characterized in that the hole in the plunger bushing communicates with spill pipe.
10. according to claim 1,2 described plunger pumps, it is characterized in that the plunger bushing bottom and be shaped on the coupling symbol above the plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100513479A CN101230821A (en) | 2007-01-23 | 2007-01-23 | Plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100513479A CN101230821A (en) | 2007-01-23 | 2007-01-23 | Plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101230821A true CN101230821A (en) | 2008-07-30 |
Family
ID=39897576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100513479A Pending CN101230821A (en) | 2007-01-23 | 2007-01-23 | Plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101230821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048068A (en) * | 2014-06-06 | 2014-09-17 | 徐州顺风阀门有限公司 | Monomer four-way reversing valve |
| CN105351245A (en) * | 2015-12-04 | 2016-02-24 | 天津市天鼓机械制造有限公司 | Mechanical sealing medium supplying control device for roots blower |
-
2007
- 2007-01-23 CN CNA2007100513479A patent/CN101230821A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048068A (en) * | 2014-06-06 | 2014-09-17 | 徐州顺风阀门有限公司 | Monomer four-way reversing valve |
| CN105351245A (en) * | 2015-12-04 | 2016-02-24 | 天津市天鼓机械制造有限公司 | Mechanical sealing medium supplying control device for roots blower |
| CN105351245B (en) * | 2015-12-04 | 2017-09-12 | 天津市天鼓机械制造有限公司 | Roots blower mechanical sealing medium apparatus for controlling of supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080730 |