CN208294714U - A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam - Google Patents
A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam Download PDFInfo
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- CN208294714U CN208294714U CN201820563286.8U CN201820563286U CN208294714U CN 208294714 U CN208294714 U CN 208294714U CN 201820563286 U CN201820563286 U CN 201820563286U CN 208294714 U CN208294714 U CN 208294714U
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Abstract
The utility model discloses a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam, including cam, plunger and roller bearing；Transmission shaft is installed, plunger at one end is located in the pump housing, and the other end is hinged with roller bearing, and roller bearing is between plunger and cam at cam center position；Sealed spring is connected between plunger and pump housing outer wall；Pump housing side wall is connected with draining valve, and bottom wall is connected to fuel tank by oil sucting valve.The utility model uses regular triangular disc cam structure, realizes three effect suction oil modes；Contour curve using the characteristics of motion of ten order polynomial function curves and more arc section function curve efficient combinations as regular triangular cam, solve the problems, such as eccentric wheel or general cam centrifugal force with because suctional oil valve opened and closed the problem for causing pump volumetric efficiency low slowly, have the advantages that volumetric efficiency is high, soft impulse is small, with small vibration and noise is small.Using using to heart roller tappet technology, has the advantages that the small, long service life of abrasion.
Description
Technical field
The utility model relates to the dedicated electrodynamic pumps of heavy truck cab turnover hydraulic system power section, it can also be used to high pressure
A kind of general industry Hydraulic Field of small stream, and in particular to three elevated pressure electrodynamic pump of single plunger based on regular triangular cam.
Background technique
Hydraulic drive is because having many advantages, such as that big power density, speed-regulating range width, small in size and self-lubricating obtain in engineering
It is widely applied.And hydraulic pump is element most crucial in hydraulic drive, quality determines the performance of entire hydraulic system.Mesh
Before, heavy truck cab lift system is exactly to utilize hydraulic transmission technology, using a kind of flat push rod eccentric wheel structure
The high-pressure electric pump of single plunger single-acting, it has many advantages, such as that structure is simply and easy to use, therefore lifts hydraulic pressure system in heavy truck
Main application has been obtained in system, it is easy to repair the purpose is to rise heavy truck driver's cabin.Although replacing manual pump to mitigate with this pump
Artificial burden and be obviously shortened the activity duration, but there is also revolving speed high (up to 5000r/min), centrifugal force is big, impact with
Vibration is big, recoil flow is big low with volumetric efficiency and only single-acting the disadvantages of, lead to abrasion aggravation service life in practical application
It is affected, shows phenomena such as noise is big and impact vibration is obvious.In addition, this heavy truck eccentric wheel structure electrodynamic pump relies primarily on
Import, higher operating costs, delivery cycle are long.For this purpose, researching and developing high-quality Chinese-built Heavy-duty Trucks electrodynamic pump with independent intellectual property rights
Be it is very necessary, the utility model have preferable theoretical significance and engineering application value.
The schematic diagram of the single plunger single-acting electrodynamic pump of flat push rod eccentric wheel structure, as shown in Figure 1, due to eccentric wheel 1
There are certain bias between transmission shaft 2, eccentric wheel 1 is rotated by DC Motor Drives axis 2, first half week at its
Phase eccentric wheel generates a downward active force to plunger and plunger is moved downward, in second half of the cycle plunger in spring force
Effect is lower to be moved upwards again, and result in formation of the reciprocating motions of plunger.Volume when plunger moves upwards in plunger cavity increases,
Pressure reduction forms negative pressure, and oil sucting valve is opened under the action of external atmosphere pressure at the same time, and the oil liquid in fuel tank enters plunger
Chamber completes oil suction movement, sucks low pressure oil；When plunger moves downward, the volume of plunger reduces, pressure rise, loads when being higher than
Pressure oil valve is opened when pressure, completes oil extraction movement, high pressure oil is discharged.There are three keys for the single plunger pump of this eccentric wheel structure
Problem: (1) the shock and vibration problem big with abrasion.Because the presence of eccentricity between eccentric wheel and transmission shaft leads to eccentric wheel
Centrifugal force is excessive, and then biggish soft impulse and vibration are generated between eccentric wheel and plunger, and aggravation is worn between the two, and
The more high this shock and vibration of revolving speed and beat damage it is more serious, moreover the revolving speed of eccentric wheel is relatively high in practical application；Again
Have, driven member also increases abrasion using flat push rod to a certain extent.(2) the low problem of volumetric efficiency.Eccentric wheel profile
Molded line is complete circle, realize that plunger pumps by eccentricity, therefore this structure type is continuously run in motor
Condition just determines that plunger motion does not have pause to extreme higher position and extreme lower position, and draining valve and oil sucting valve are because failing at this time
Closing in time causes the mistake of subsequent time oil suction or oil extraction to inhale or misprint.For example, when plunger motion to extreme higher position this in a flash
It is just the end of oil-absorbing process, and oil sucting valve ought to close in time in a flash at this, but due to oil suction valve core opening and closing itself
Need the regular hour to cause to fail to completely close when plunger motion is to extreme higher position, then the plunger in extreme higher position because
The continuous rotation of motor will move downward and oil extraction in a flash under, will have partial high pressure oil liquid to pass through not pass completely first this moment
The oil sucting valve that closes and flow back to fuel tank, high pressure oil could be expelled to hydraulic pressure system through draining valve after completely closing by only equal oil sucting valves
In system, so volumetric efficiency can be reduced.It for another example, is just the end of oil extraction process when plunger motion is to extreme lower position, it ought to
The draining valve of closing actually fails to completely close in a flash at this, then the plunger in extreme lower position turns in the continuous of motor
It will be moved upwards and oil suction in a flash under under dynamic, and will there is partial high pressure oil liquid to pass through the draining valve not completely closed this moment and enter
Plunger cavity, only equal draining valves could pass through oil sucting valve in the oil liquid sucking plunger cavity in fuel tank after completely closing, this is greatly
Ground weakens oil absorption capacity and reduces the volumetric efficiency of pump.(3) single-acting problem.The single plunger pump of eccentric wheel structure it is inclined
The every fortune of heart wheel circles, and plunger pumps the only one period, and oil suction and oil extraction are only each primary, here it is single-acting,
Such mode of action is inefficient.
For the problems of the heavy truck electrodynamic pump of existing flat push rod eccentric wheel structure, the utility model is intended to practical
It is novel a kind of with output flow is big, revolving speed is low, small in size, impact is low with small vibration, noise, recoil flow is small, volumetric efficiency
The Novel heavy-truck multiaction electrodynamic pump for the advantages that high, suction capacity is strong and long service life.
Utility model content
The utility model is directed to the single plunger single-acting pump of general flat push rod eccentric wheel structure, and that there are revolving speeds is high (reachable
5000r/min), centrifugal force is big, impact and vibration are big, recoil that flow is big, volumetric efficiency is low and only single-acting the disadvantages of, propose
A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam, it is intended to the revolving speed of pump is reduced, impact and vibration are reduced,
Fretting wear is reduced, the volumetric efficiency of pump is improved, extends the service life of pump and its driving motor.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam, including cam, plunger and roller bearing；
Transmission shaft is installed at the cam center position；The plunger at one end is located in the pump housing, and the other end is hinged with roller bearing.
For the roller bearing between plunger and cam, the bearing surface of roller bearing and the cam surface of cam are opposite, convex
Wheel drive roller bearing；The plunger upper part is mounted with backing ring, is connected between backing ring downside and pump housing outer wall sealed
Spring；Pump housing side wall is connected with draining valve, and bottom wall is connected to fuel tank by oil sucting valve.
When the cam rotates under the transmission shaft driving of direct current generator, the plunger is in cam, sealed spring and roller
It is reciprocating in the pump housing under the collective effect of bearing, and the every rotation of cam piston reciprocation movement in one week is three times.
When plunger moves upwards under the action of sealed spring, the volume in plunger cavity increases, generation vacuum, in fuel tank
Oil liquid plunger cavity is entered by oil sucting valve under atmospheric pressure effect, complete oil suction and act.
When plunger is in extreme higher position can an of short duration dead time, this time not oil suction not oil extraction but can also allow
Oil suction valve core is fully closed under the action of its spring force, because oil sucting valve has little time to close when acting to avoid next oil extraction
Or being not closed completely causes a part of oil liquid to misprint the volumetric efficiency in fuel tank and reducing pump through oil sucting valve.
When plunger moves downward under the action of cam, the volume in plunger cavity reduces, and oil liquid is squeezed, pressure rise
And oil liquid is discharged in system by draining valve, realize oil extraction.
When plunger is in extreme lower position also can an of short duration dead time, this time not oil suction also not oil extraction but energy
Make oil extraction valve core fully closed under the action of its spring force, to avoid next oil suction movement because draining valve has little time to close
Or being not closed completely causes high pressure oil to enter plunger cavity through draining valve.
When the transmission shaft every revolution, the enclosed volume in plunger cavity completes oil suction and oil extraction movement is each three times, realizes
Three effect suction oil modes.
The contour curve of the cam uses the fortune of ten order polynomial function curves and arc section function curve organic assembling
Dynamic rule.
The utility model has the beneficial effects that the utility model has the advantages that:
(1) regular triangular disc cam structure is used, realizes three effect suction oil modes, theoretical displacement improves three
Times.In the case where output flow and constant other parameters, the revolving speed of pump is reduced, to reduce fretting wear, is extended
The service life of pump and its driving motor.In addition, the output flow pumped in the case where revolving speed is constant is three times in single plunger nonoculture
The promotion time of eccentric wheel pump, heavy truck driver's cabin is shorter, more efficient.
(2) using the characteristics of motion of ten order polynomial function curves and more arc section function curve efficient combinations as positive three
The contour curve of side shape cam solves the problems, such as eccentric wheel or general cam centrifugal force and causes to pump slowly because suctional oil valve opened and closed
The low problem of volumetric efficiency has the advantages that volumetric efficiency is high, soft impulse is small, with small vibration and noise is small.
(3) using using to heart roller tappet technology, has the advantages that the small, long service life of abrasion.
Detailed description of the invention
In order to facilitate the understanding of those skilled in the art, the utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is existing single plunger pump hydraulic schematic diagram；
Fig. 2 is a kind of schematic diagram of the three elevated pressure electrodynamic pump of single plunger based on regular triangular cam of the utility model；
Fig. 3 is the utility model plunger displacement change curve；
Token name claims in Fig. 2: 1- cam；2- transmission shaft；3- backing ring；4- plunger；5- draining valve；6- oil sucting valve；
7- fuel tank；The 8- pump housing；9- sealed spring；10- roller bearing.
Specific embodiment
The utility model will be further described with reference to the accompanying drawing.
Present in single plunger single-acting high-pressure electric pump of the utility model for existing flat push rod eccentric wheel structure
Disadvantage problem, innovation propose the technical solution of " a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam ", purport
In the revolving speed to reduce pump, reduce impact and vibration, reduce fretting wear, improve the volumetric efficiency of pump, extends pump and its driving
The service life of motor is target.
A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam, as shown in Fig. 2, specifically including that cam
1, transmission shaft 2, backing ring 3, plunger 4, draining valve 5, oil sucting valve 6, fuel tank 7, the pump housing 8, sealed spring 9 and roller bearing 10；
1 center position of cam is equipped with transmission shaft 2, and 4 one end of plunger is located in the pump housing 8, and the other end is hinged with Roller Shaft
10 are held, for roller bearing 10 between plunger 4 and cam 1, the bearing surface of roller bearing 10 is opposite with the cam surface of cam 1；Column
It fills in 4 tops and is mounted with backing ring 3, be connected with sealed spring 9 between 8 outer wall of 3 downside of backing ring and the pump housing；8 side wall of the pump housing connects
It is connected to draining valve 5, bottom wall is connected to fuel tank 7 by oil sucting valve 6；
For the cam 1 when rotating under the transmission shaft 2 of direct current generator drives, the plunger 4 (driven member) is (main in cam 1
Moving part), it is reciprocating in the pump housing 8 under the collective effect of sealed spring 9 and roller bearing 10, and the every rotation of cam 1 one week
Plunger 4 moves back and forth 3 times.When moving upwards under the action of plunger 4 is in sealed spring 9, the volume in plunger cavity increases, and generates
Vacuum, the oil liquid in fuel tank 7 enter plunger cavity by oil sucting valve 6 under atmospheric pressure effect, complete oil suction movement.At plunger 4
When extreme higher position can an of short duration dead time, this time not oil suction also not oil extraction but can allow oil suction valve core in its bullet
It is fully closed under the action of spring force, because oil sucting valve has little time to close or be not closed completely to lead to one when being acted to avoid next oil extraction
Part oil liquid misprints the volumetric efficiency in fuel tank and reducing pump through oil sucting valve；It is transported downwards under the action of plunger 4 is in cam 1
When dynamic, the volume in plunger cavity reduces, and oil liquid is squeezed, and oil liquid is simultaneously discharged in system by draining valve 5 by pressure rise, real
Existing oil extraction.When plunger 4 is in extreme lower position also can an of short duration dead time, this time not oil suction also not oil extraction but energy
Make oil extraction valve core fully closed under the action of its spring force, to avoid next oil suction movement because draining valve has little time to close
Or being not closed completely causes high pressure oil to enter plunger cavity through draining valve, so that influencing oil absorption capacity reduces volumetric efficiency；The transmission
When 2 every revolution of axis, the enclosed volume in plunger cavity completes oil suction and oil extraction movement is each three times, realizes three effect suction oil sides
Formula improves efficiency compared to single-acting mode.The contour curve of the cam 1 uses ten order polynomial function curves and arc section
The characteristics of motion of function curve organic assembling.
The utility model cardinal principle content: (1) regular triangular disc cam structure is used.Every turn of disc cam of positive three side
Driven member plunger can be made to pump three times within dynamic one week, and then suction, oil extraction respectively three times, achieve the purpose that three effects, increased
The discharge capacity pumped greatly effectively improves the working efficiency of pump.(2) regular triangular cam contour Profile Design is that ten formula item formula functions are bent
The organic assembling of line and more arc section curves, i.e. ten order polynomial profile molded line of cam correspond to the rise of driven member plunger or return
Journey, circular arc segment profile molded line correspond to the remote stand-down and nearly stand-down of driven member plunger, and the purpose is to allow driven member plunger to divide
There is not an of short duration pause in highest and lowest position, plunger displacement change curve is as shown in Figure 3.Plunger is most in Fig. 3
High position and lowest position remain stationary certain time, specifically when plunger is being in time that extreme higher position remains stationary just
Oil can be allowed to inhale valve core well to completely close, oil liquid passes through first when avoiding next because of plunger displacement reduction oil extraction is not closed completely
Or the oil sucting valve that does not completely close and misprint, influence oil extraction ability；When plunger is being in time that extreme lower position remains stationary also just
Draining valve can be allowed to completely close well, avoid next that high pressure oil passes through be not closed completely first when oil suction due to plunger displacement increase
Or the draining valve not completely closed enters plunger cavity, to influence the oil absorption capacity of pump.So plunger is in highest and lowest position
Pause can effectively improve the volumetric efficiency of pump.Further more, cam contour type uses ten order polynomial function curves, the purpose is to
Plunger is allowed either still to connect in final position, speed, acceleration and jerk diagram in initial position in rise and backhaul
Continue smooth, changes slowly without mutation, and amplitude is smaller, and the abrasion between cam and plunger can be effectively reduced in this way, reduces flexible punching
It hits and vibrates.(3) using to heart roller tappet.Driven member uses roller tappet, i.e., in driven member --- between plunger and cam
Using roller bearing transition, roller is hinged with plunger.Such technological means can effectively reduce abrasion and reduce pressure angle.(4) exist
On the basis of the technical solution of front three, redesign the parts such as sealed spring, plunger, the pump housing and bearing, and to sealed spring,
Plunger and backing ring carry out stability, resonance and higher harmonic resonance analysis.(5) re-optimization design oil sucting valve and draining valve, make
Stand-down remote with plunger and nearly time stand-down match suctional oil valve opening and closing time respectively, and carry out to the spring of suctional oil valve
Optimization design.
The utility model has the advantages that:
(1) regular triangular disc cam structure is used, realizes three effect suction oil modes, theoretical displacement improves three
Times.In the case where output flow and constant other parameters, the revolving speed of pump is reduced, to reduce fretting wear, is extended
The service life of pump and its driving motor.In addition, the output flow pumped in the case where revolving speed is constant is three times in single plunger nonoculture
The promotion time of eccentric wheel pump, heavy truck driver's cabin is shorter, more efficient.
(2) contour curve using the characteristics of motion of ten order polynomials and circular arc efficient combination as regular triangular cam,
Eccentric wheel or general cam centrifugal force are solved the problems, such as with because suctional oil valve opened and closed the problem for causing pump volumetric efficiency low slowly, is had
Have the advantages that volumetric efficiency is high, soft impulse is small, with small vibration and noise is small.
(3) using using to heart roller tappet technology, has the advantages that the small, long service life of abrasion.
The innovation point of the utility model: (1) to the single plunger three of heart roller tappet regular triangular disc cam structure
The technical solution of elevated pressure electrodynamic pump, this scheme have preferable innovative；(2) determination of cam contour molded line and combination side
Formula.There is novelty with combination using the selection of ten order polynomial function curves and more arc section function curves is determining, i.e.,
Ten order polynomial function curved section of cam respectively corresponds rise and the backhaul of plunger, and cam circle arc function curved section corresponds to plunger
Remote stand-down and nearly stand-down；(3) opening and closing time of the far angle of repose of plunger and near angle of repose and suction, draining valve matches, this
The it is proposed of a technical requirements has novelty.
Further, this case further embodiments further include: (1) use 50 order polynomial function curves and arc section letter
Number curve combination to the heart to the technical solution of the single plunger pump of heart roller tappet regular triangular cam structure.This technical solution energy
Fully achieve the utility model aim.(2) technical solution of multi-plunger movement is driven using eccentric wheel." three effects " may be implemented
Purpose.
The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously
There is no the details that detailed descriptionthe is all, also not limiting the utility model is only the specific embodiment.Obviously, according to this theory
The content of bright book can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably
The principles of the present invention and practical application are explained, so that skilled artisan be enable to better understand and utilize this
Utility model.The utility model is limited only by the claims and their full scope and equivalents.
Claims (9)
1. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam characterized by comprising cam (1), column
Fill in (4) and roller bearing (10)；Cam (1) center position is equipped with transmission shaft (2)；Described plunger (4) one end is located at
In the pump housing (8), the other end is hinged with roller bearing (10).
2. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 1, feature
It is, the roller bearing (10) is located between plunger (4) and cam (1), bearing surface and cam (1) of roller bearing (10)
Cam surface is opposite, and cam (1) drives roller bearing (10)；Plunger (4) top is mounted with backing ring (3), under backing ring (3)
Sealed spring (9) are connected between side and the pump housing (8) outer wall；The pump housing (8) side wall is connected with draining valve (5), and bottom wall passes through suction
Oil valve (6) is connected to fuel tank (7).
3. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 2, feature
It is, when the cam (1) rotates under transmission shaft (2) driving of direct current generator, the plunger (4) is in cam (1), sealed bullet
It is reciprocating in the pump housing (8) under the collective effect of spring (9) and roller bearing (10), and cam (1) one week plunger of every rotation
(4) it moves back and forth three times.
4. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 3, feature
It is, when moving upwards under the action of plunger (4) is in sealed spring (9), the volume in plunger cavity increases, and generates vacuum, oil
Oil liquid in case (7) enters plunger cavity by oil sucting valve (6) under atmospheric pressure effect, completes oil suction movement.
5. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 3, feature
Be, when plunger (4) is in extreme higher position can an of short duration dead time, this time not oil suction not oil extraction but can also allow
Oil suction valve core is fully closed under the action of its spring force, because oil sucting valve has little time to close when acting to avoid next oil extraction
Or being not closed completely causes a part of oil liquid to misprint the volumetric efficiency in fuel tank and reducing pump through oil sucting valve.
6. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 3, feature
It is, when moving downward under the action of plunger (4) is in cam (1), the volume in plunger cavity reduces, and oil liquid is squeezed, pressure
It increases and passes through draining valve (5) and oil liquid is discharged in system, realize oil extraction.
7. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 3, feature
Be, when plunger (4) is in extreme lower position also can an of short duration dead time, this time not oil suction also not oil extraction but energy
Make oil extraction valve core fully closed under the action of its spring force, to avoid next oil suction movement because draining valve has little time to close
Or being not closed completely causes high pressure oil to enter plunger cavity through draining valve.
8. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 1, feature
It is, when transmission shaft (2) every revolution, the enclosed volume in plunger cavity completes oil suction and oil extraction movement is each three times, realizes
Three effect suction oil modes.
9. a kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam according to claim 1, feature
It is, the contour curve of the cam (1) uses the fortune of ten order polynomial function curves and arc section function curve organic assembling
Dynamic rule.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820563286.8U CN208294714U (en) | 2018-04-19 | 2018-04-19 | A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820563286.8U CN208294714U (en) | 2018-04-19 | 2018-04-19 | A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam |
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| CN208294714U true CN208294714U (en) | 2018-12-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457830A (en) * | 2018-04-19 | 2018-08-28 | 安徽德鸿机件制造有限公司 | A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam |
| CN109723959A (en) * | 2019-01-15 | 2019-05-07 | 河谷(佛山)智能装备股份有限公司 | It is a kind of can air-discharging grease lubrication pump pump core |
-
2018
- 2018-04-19 CN CN201820563286.8U patent/CN208294714U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457830A (en) * | 2018-04-19 | 2018-08-28 | 安徽德鸿机件制造有限公司 | A kind of three elevated pressure electrodynamic pump of single plunger based on regular triangular cam |
| CN109723959A (en) * | 2019-01-15 | 2019-05-07 | 河谷(佛山)智能装备股份有限公司 | It is a kind of can air-discharging grease lubrication pump pump core |
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