CN1997812A

CN1997812A - Controlled feeding system

Info

Publication number: CN1997812A
Application number: CNA2005800245794A
Authority: CN
Inventors: T·延森
Original assignee: HANS JENSEN LUBERICATORS AS
Current assignee: HANS JENSEN LUBERICATORS AS; Hans Jensen Lubricators AS
Priority date: 2004-06-18
Filing date: 2005-06-14
Publication date: 2007-07-11
Also published as: DK200400958A; JP3161566U; JP2008502836A; WO2005124112A1; KR200466383Y1; CN101915140A; EP1781906A1

Abstract

There is described a dosing system for cylinder lubrication oil for large diesel motors, e.g. in marine engines. The system has a supply pipe and a return pipe provided with each their valve (3, 27), and which are connected with a central supply pump. This comprises a number of injection units that are connected with the said pipes. Each unit comprises a number of injection nozzles for injecting at least one compact lubricating oil jet on the cylinder surface in an associated cylinder, as atomization of the lubricating oil jet through the injection nozzle is avoided to the greatest possible extent, a piston (1) provided at a rearmost part of the nozzle rod, and a controllable motor (37) which via a screw (33) is connected with the piston (1) in order thereby to adjust the pump stroke/position of the piston (1). Furthermore, the system comprises a cental computer for controlling the valves (3, 27) and the motor (37) so that precise control of the amount of oil and precise timing are achieved.

Description

Controlled feeding system

Technical field

The present invention relates to a kind of lubrication system of large-scale diesel engine, wherein, cylinder oil supplies to casing surface by many nozzles as vaporific oil droplet.For example can know such system from WO00/28194.

Background technique

By means of traditional time control lubricating fitting oil is supplied to independent nozzle, donkey is delivered to its each nozzle from this time control lubricating fitting with the fry dried food ingredients of specified rate by valve.

A lubricating fitting is used for an engine cylinder or one group of engine cylinder, and always directly drive by diesel engine and described oil part regularly the certain hour point of engine cycles (that is) synchronous with it when being applied on the casing surface.Lubricating fitting usually with each independent lubricating point certain distance apart.In very long pipeline, the compressibility of oil has decisive influence to dose accuracy.Even use the experience of this system aspects to illustrate: in the pipeline that reaches 6-7 rice, dose accuracy be it seems does not have to take place very big deviation, still, is being used between definite dosage and the unit of time (regularly) and the dosing point (cylinder wall), duct length is short more, and is just favourable more.

When motor revolution or whenever fixing revolution weight feed part cylinder oil, unique possibility of regulating delivery volume changes throw of pump exactly.In patent application DK 4998/85, narrated the system that is used for this purpose.Operate this system by cam disk mechanism, this cam disk mechanism is used for regulating pump stroke according to engine load.Replace this cam disk by other cam disks, just change this coherence effectively with different transfer functions.

Not every diesel engine can with this diesel engine revolution synchronously direct mechanical drive lubricating fitting.And, easily regulate quantitative cylinder lubrication oil mass according to different measurable engine parameters according to the actual direct requirement flexibility of motor with regard to needing further.Also need to regulate continuously regularly with flexible way according to the practical operation situation.All these are regulated preferably and can be undertaken by center control.

Synchronously to drive lubricating fitting feasible on electronics method with engine revolution, but this is larger and cost is higher.Utilize this system, can change immediately regularly.

Also proposed to regulate pump stroke, for example stepper motor by controllable motor.This has been used for spot lubrication.

The system that is used for cylinder wall lubrication also is a prior art, and wherein, lubricant oil is as the spray injection of tiny oil droplet.This injection exists scavenging can take away the danger of parts of lubricating oil, therefore lubricated inadequate danger is just arranged, or replacedly, the danger of consumption lubricant oil that need be bigger is just arranged.

Aspect traditional cylinder wall lubrication, make spring-loading safety check so far actual, this safety check can be resisted the internal pressure in the cylinder, but yields to high slightly outer jet pressure.Aspect of the present invention, need and must make valve system just under higher oil pressure, open, so that oil spurts presents fine and close oily jet injection feature from the beginning.Thus, we can say pressure reduction factor until percent hundreds of.

Summary of the invention

The purpose of this invention is to provide a kind of system that is used for by using fine and close lubricant oil jet to lubricate the cylinder of large-scale diesel engine, thus, can obtain center Flexible Control, and thus except obtaining accurate control regularly, also obtain the accurate control of oil mass pump stroke.

According to the present invention, this can obtain by utilizing dosing system, this dosing system has supplying pipe and the reflow pipe that is provided with valve separately and links to each other with the central supply pump, and have a plurality of injection units, the quantity of the lubricating point in this injection unit and each cylinder is corresponding and link to each other with pipe, and each unit comprises:

The nozzle of-each lubricating point, it is used for the lubricant oil jet injection of at least a densification to the casing surface of cylinder that links to each other, and as much as possible avoids the lubricant oil jet to atomize by nozzle;

-piston, it places the rear end of jet stem, and

-controllable motor, it is resisted against on the piston successively by screw, thus the pump stroke/position of regulating piston, this system also comprises

-central computer is to be used for control valve and controllable motor.

Utilize this system, just can easily regulate stroke by controllable motor is set.This can finish at the center from the data of the operating parameter of the relevant motor of reception by computer.And the opening and closing of valve can be controlled by computer.Utilization is according to system of the present invention, therefore can change the operating parameter of motor, with the timing and the amount of the cylinder oil that changes weight feed.Can be at this lubricant oil of needed time weight feed in the operation cycle of motor.When spraying fine and close jet, can obtain especially effectively cylinder lubrication, this is because the risk that does not exist the lubricant oil of very thin atomized drop shape to be directed taking away along with scavenging.

In a cylinder, can have one or more injection units.Usually, the number of injection unit is the multiple of number of cylinders.

According to the particular embodiment of the present invention, the specialization of this system is, nozzle comprises the cylindrical spout bar that is used for cooperating the hole of passing cylinder wall, this jet stem has the central passage that is used for needle valve body and is used for compressed oil is controllably supplied to the second channel of front pressure chamber, wherein, this needle valve body quilt is along the outward direction spring-loaded, to be used in the jet expansion of jet stem, closing inner valve seat, in this front pressure chamber, compressed oil can apply backward pressure to needle valve body, with the overvoltage injection that is used to open inner valve seat and be lubricated oil by the nozzle of opening, reduce up to oil pressure, to close needle-valve effectively, ring-shaped cylinder shape space between the through tube that second channel is provided with by the cylindrical spout bar of outer tubular and center constitutes, and the through tube that this center is provided with is used for holding needle valve body at the center.

According to the present invention, use the nozzle of valve control, to be used for that the lubricant oil of cylinder is ejected into the large-scale diesel engine cylinder.Because utilizing very high jet pressure in this system operates, obtain required concentrating and fine and close lubricant oil jet thus, wherein, the lubricant oil jet injection is to casing surface, rather than in a kind of system, lubricant oil just flows through the lubricated aperture in the cylinder.

More known nozzle group valves (it is worked under corresponding conditions), the various injection units that just are used for the fuel of engine cylinder, but, because these existing equipments are arranged on other installation conditionss under rather than with pass cylinder wall and insert accordingly under those conditions, therefore, these existing equipments do not relate to the cylinder lubrication oil injection, and are not directly applied for this purpose, and the propagation of its spraying is different.

Yet, aspect of the present invention, have been found that, novel valve is based on some essential characteristics of these existing fuel valves, that is to say that its outward appearance of main reference is as pole, it has central passage, pressure spring and fluid passage, therefore when required force applications is on liquid, this valve body is also promoted needle-valve thus backward, wherein, this central passage is used to receive valve body, this valve body has and the interactional preceding needle of valve seat, and very near the external nozzles mouth, described pressure spring places the back to this valve seat, so that valve body and pin are pushed against forward on the valve seat, described fluid passage is used for pressurized liquid is guided to the pressure chamber of valve body front portion.Thus, just when setting up high pressure, just can open nozzle, promptly, but can be from the just liquid of direct injection jet-like that begins of valve opening, it is so many or so few to descend up to higher fluid pressure, to such an extent as to pressure no longer can overcome the effect of described pressure spring, promptly, the injection of jet-like will stop suddenly then, still have very large pressure simultaneously on liquid.Will a spot of liquid that leaks backward take place from described pressure chamber, the liquid of this leakage can be discharged by described central passage then.

Relevant fuel valve usually can be without any in the cylinder head of making and be assembled to motor difficultly, and has the described valve rod of required size.Herein, conclusive condition is by this set, to have the space of the abundance that is used for these bars, be used to set up the described central passage cross section size required with parallel with it liquid supply passage to present, these passages have tangible thickness in fuel valve.

Aspect the valve that is used for cylinder wall lubrication, institute's sizing is different fully with installation conditions.It is minimum that key is that stem diameter is made as, particularly in existing engine cylinder, just do not allow initially default big " lubrication hole " of penetration ratio on it this moment, and, in fact, these lubrication holes are out and away less than being located at the hole that is used in the cylinder head by fuel valve.

Under this background, in cylinder wall lubrication, use the advantage of identical technology to be, because supplying with, necessary liquid will just constitute the smaller portions of fuel flow herein, and liquid supply conduit herein can be rather narrow, and therefore, this will be the advantage of minor diameter valve rod.Yet in fact, problem herein is, when forming the extremely thin pipeline that passes the elongated relatively body of rod and be unusual difficulty, the particularly passage in pipeline places the body of rod outside.Therefore the direct application of described prior art will mean the unpractical costliness of manufacturing meeting of the narrow body of rod or make the unacceptable very thick body of rod.

By the present invention, by the liquid supply conduit that disperses, realized thorough change, wherein to these situations, the liquid supply conduit that disperses is set to the circulating line around the central passage, and respectively as in one or more axial notches in the zone between intracardiac pipe and the rod tube on every side.By being divided into two pipes like this, under the situation of the cutting operation that does not need hell and high water, can be provided with narrow pipeline, it can occupy minimum space in radial direction, and, in fact, it can take the very little nozzle group valve of thickness, can be applicable to special purpose described herein fully.

Description of drawings

With reference to accompanying drawing narration the present invention, wherein:

Fig. 1 illustrates according to system of the present invention, and this system has three injection units that are used for a cylinder;

Fig. 2 illustrate injection unit among Fig. 1 along line II-II with the partial section shown in the magnification ratio; And

Fig. 3 illustrates another embodiment's of the valve that is used in dosing unit partial section.

Embodiment

Be depicted as the device that has three injection unit/valves according to system of the present invention shown in Figure 1, still, its number is not limited to three.Injection unit comprises the dosing unit that is directly installed on each independent valve.Each cylinder that motor had has coupled corresponding system.

Dosing unit (it clearly show that in Fig. 2) is made up of piston 1, and it can have illustrated stepped piston.When this system did not have pressure, this piston was by spring 1 ' remain on left side.When opening valve 3, compressed oil is supplied to compartment 5 from the pump (not shown) via forcing pipe 17, thus, make piston move to the right side, the oil that is moved by the right-hand member of piston is directed to compartment 30 before arriving valve needle 18 by pressure valve 7 via conveyance conduit 9,24 and 28, and further the nozzle pipe 12 of nozzle 11 is passed in guiding.Hereinafter will narrate the function of valve in more detail.

The oil that leaks from valve is directed to reflow pipe 23 by

pipeline

13,15 and 21.The compartment 25 of spring 1 ' on every side links to each other with reflow pipe 23 continuously by hole 19, and therefore, the oily volume of the variation in this compartment 25 is not upset its function.When piston 1 had arrived its bottom position, valve 27 was opened, and valve 3 cuts out.Thus, compartment 5 links to each other with reflow pipe 29, and spring 1 ' will force piston 1 to turn back to its ultra-Left position supplies to compartment 51 by the suction valve in the piston 1 31 with new oil.Suction valve needn't place in the piston 1.Regulate pump stroke with the screw 33 that rotates by controllable motor 37.

Valve 3 and 27 opening and closing and control motor 37 can be begun at the center to carry out by the computer (not shown), and this computer receives the operating parameter of motor, and with its conversion, to change respectively regularly and pump stroke.

Described dosing unit needn't be installed on each independent nozzle unit, but, for example it can be installed with the dosing unit assembling of other nozzle units that are used for cylinder, therefore, can just can be all dosing unit executing location/stroke by an independent motor 37 and regulate.Dosing unit can be connected on the valve in the cylinder wall by means of pipe joint then.Owing to compare with traditional lubricating fitting, this dosing unit is less, and the dosing unit that connects together can be installed in any position of approaching lubricating point, and can not cause the restriction that large-scale conventional lubrication device is comprised.Therefore, the necessary pipe joint between dosing unit and the valve can still keep quite short.

Device shown in Figure 3 comprises elongated thin outer pipe 2, and it will insert with in the lateral bore 4 in the cylinder wall of point-like profile line sign, and is defined between the deflection curve 6a and 6b of point-like.This effective nozzle plug 8 stops on the inwall 6a of cylinder, this nozzle plug 8 has mouth in nozzle projection 10, and nozzle pipe 12 with outer inclination, to spray fine and close lubricant oil jet, the direction of this lubricant oil jet and the inwall of cylinder be tangentially roughly, and enters pipeline 14 supplies by the center.

The outer end 16 of needle 18 is contained in this pipeline 14, with needle 18 guiding in the obstruction portion (block part) 20 on the pipe 22 in being connected to vertically, should pass from whole outer tube 2 extensions by interior pipe 22, and with it at a distance of certain radial distance, perhaps be provided with groove therebetween, therefore, pipeline 24 is defined between these pipes.This pipeline 24 is used for compressed oil is guided to obstruction portion 20 from connecting housing 26, in this obstruction portion 20, be formed with tilted tube 28, its downward direct pressurized oil that can make progress, to be communicated with, connect the outside that housing 26 is positioned at the outer wall 6b of motor cylinder with the compartment 30 of thickened portion 32 front portions on the needle 18.Thus, the compressed oil of being supplied with can apply back pressure on needle.

At the rear portion, needle 18 is resisted against on the pressure spring 32, this pressure spring 32 embeds in the interior pipe 22 and is supported on the front end of cylindrical slider 34, this cylindrical slider 34 can longitudinal sliding motion in interior pipe 22, and can back and forth regulate within it by the screw 33 on obstruction portion 26 rear portions, wherein, this screw can be by motor 37 rotary driving.Prevent limited slip block 34 rotations by means of guiding element 35.Pipeline 24 in the obstruction portion 26 is connected on the radial passage 38, and this radial passage 38 is connected to the pipe joint 42 that is used for compressed oil.The inboard of interior pipe 22 links to each other with second pipe joint 46 via link 44,, is used to discharge the oil of leakage that is, and the oil of this leakage passes interior pipe backward from the nozzle end zone, and wherein, pipe is not made special seal in this except cooperating.

With spring 32 remain on the corresponding suitably preload of the required clossing pressure of needle under, and, when the oil pressure on pipe joint 42 increases to the unlatching level, needle will be forced to retreat a little via the oil pressure that acts on the needle thickened portion 32, therefore, the needle point leaves it out to the valve seat contacting part on the end of the narrow pipeline of nozzle pipe 12, and just in time partly produces the fine and close high-pressure spray of the indicated oily jet of the reference character that penetrates from nozzle 48 thus from the beginning of opening.Keep this state, begin to occur pressure until the lubricant oil of being supplied with and descend, thus, from the injection end-stop of nozzle.

Obviously, less relatively diameter can appear in whole pipe portion, be respectively applied for oily service of compressed oil and leakage and blowdown piping without any need for special cutting operation (except the outside tilted tube 28), and pipe 22 in spring 32 also can place, obstruction portion 20 is not because it holds spring 32 these facts, and is therefore small-sized.

In Fig. 3, the nozzle that illustrates radially passes cylinder wall 6a, 6b.Replacedly, nozzle can be with respect to a radian with the angle of inclination orientation.This will decide according to spatial condition, material thickness etc.

It is to be noted that can replacedly supply with compressed oil via the one or more longitudinal flutings in outer tube 2 or the interior pipe 22, this will mean identical as previously mentioned production convenience.

Claims

1. dosing system that is used for the cylinder oil of large-scale diesel engine such as marine engine, it has and respectively carries valve (3,27) and be connected to the supplying pipe and the reflow pipe of central supply pump, and have with each cylinder in the lubricating point number corresponding and with a plurality of injection units of being connected of pipe, each unit comprises:

The jet blower of-each lubricating point, it is used for the casing surface of the lubricant oil jet injection that at least one is fine and close to the cylinder that links to each other, and farthest avoids the lubricant oil jet to pass nozzle and atomizes;

-piston (1), it places on the rear end of jet stem, and

-controllable motor (37), it is resisted against on the piston (1) successively via screw (33), the pump stroke/position of regulating piston (1) thus, this system also comprises

-central computer, it is used for control valve (3,27) and controllable motor (37).

2. the system as claimed in claim 1, it is characterized in that, nozzle comprises and is used to cooperate the cylindrical spout bar (2) that passes the hole (4) in the cylinder wall, the second channel (24) that this jet stem has the central passage (14) that is used for needle valve body (18) and is used for compressed oil is controllably supplied to front pressure chamber (30), this needle valve body (18) is subjected to spring-loaded on outward direction, close inner valve seat with jet expansion at jet stem, in this front pressure chamber (30), compressed oil can apply backward pressure to needle valve body, spray to open inner valve seat and to make this compressed oil carry out overvoltage by the nozzle of opening, reduce up to oil pressure, to be used for closing effectively needle-valve, guide groove (24) between the through tube (22) that this second channel (24) is provided with by the cylindrical spout bar (2) that is located at outer tubular and center is formed, and this through tube (22) is used for holding at the center needle valve body (18).

3. system as claimed in claim 1 or 2 is characterized in that, piston (1) is loaded by spring (1 '), when not having pressure in system, supplies with compartment (5) towards oil and promotes piston.

4. as claim 1,2 or 3 described systems, it is characterized in that nozzle (11) is provided with the nozzle passage (12) of outer inclination.

5. the described system of arbitrary as described above claim is characterized in that nozzle and controllable motor are provided with one heart around common axle.

6. as the described system of arbitrary claim among the claim 2-5, it is characterized in that the spring (32) that acts on the needle valve body is resisted against on the slide block (34) that can vertically move, its stroke/position is determined by controllable motor (37).

7. system as claimed in claim 6 is characterized in that, slide block (34) is fixed by guiding element (37) with being rotated.

8. as the described system of arbitrary claim among the claim 2-7, it is characterized in that the spring (32) that acts on the needle valve body has and the corresponding preload of required clossing pressure that is used for needle (18).