CN205663609U - Plunger pump - Google Patents

Abstract

The utility model provides a plunger pump, include: a motor. The shaping has the slider that is used for installing the crankshaft groove of bent axle and links to each other with the plunger to make the spout of reciprocating sliding in the crankcase, crankcase, install in the crankcase in the crankshaft groove: bent axle, bent axle receive the the motor output shaft drive rotatory, install in the crankcase in the spout: connecting rod, its one end rotate with the bent axle is connected other end fixed connection slider to under the drive of bent axle, drive slider reciprocating sliding in the spout, the plunger is connected with the slider, under the drive of slider in high -pressure cylinder liner reciprocating motion to realize imbibition and flowing back, still include lubricating system, the gear oil pump to and the circulating lubrication oil circuit of connection gear oil pump, gear oil pump trend lubricating oil carries out force -feed lubrication through the lubrication gun with the moving part to in the plunger pump.

Description

A kind of plunger displacement pump

Technical field

This utility model relates to technical field of engineering machinery, is specifically related to plunger displacement pump.

Background technology

High-pressure high-flow emulsion pump is the hydraulic power supply for the design of Large Coal Enterprises fully-mechanized mining working support apparatus, Being the key equipment realizing work surface high-yield and high-efficiency, the seriality of its work, Stability and dependability are for ensureing coal enterprise Safety in production and increasing economic efficiency have very important significance.Along with coal-mining technique develops to high-tech direction, to breast Change pump station and it is also proposed new requirement, the flow of pump to be ensured and pressure, the most also require to ensure the service life of pump And reliability, i.e. improve the unfailing service time.At present the emulsion pump of largest domestic flow reaches 550L/min, but relatively In high-end big fluid inlet product, it cannot meet the serviceability requirement of the above coal mining output of ten-million-ton scale, and big flow is high-end Emulsion pump fully relies on import.

Current existing plunger displacement pump generally uses between bent axle 31 and connecting rod 34 and use forced feed lubrication, i.e. note in oil circuit Enter lubricating oil so that it obtains lubrication, between slide block 35 and chute, then use splash lubrication, with reference to Figure 17, the lubrication of bent axle 31 Being to deliver lubricating oil in the through hole in the middle of bent axle 31 by gear pump, oil one is bored laterally respectively in each bearing shell centre position Through hole in the middle of aperture and bent axle 31 communicates, then by horizontal aperture, delivers lubricating oil to the surface of bearing shell, make bearing shell with The axle journal of bent axle 31 obtains lubrication.In the work process of bent axle, its turning effort is got rid of driving lubricating oil adhered thereto To the upper oil sump of crankcase, then by the aperture in upper oil sump, lubricating oil is delivered to the surface of slide block 35, thus completes sliding The lubrication of block.This splash lubrication mode have the disadvantage that when plunger displacement pump install status the most at ordinary times, in slide block 35 relatively High position is difficult to obtain lubrication, and the other end of connecting rod 34 is also not readily available lubrication, thus is easily caused slide block 35 He Chute sinters, and then crankcase 20 is damaged, and the foreign material in upper oil sump also readily penetrate through aperture and enter into slide block Between 35 and chute, cause chute abrasion etc..

Utility model content

Therefore, the technical problems to be solved in the utility model is to overcome in large-flow emulsion pump of the prior art and adopts Make foreign material readily penetrate through pin control with splash lubrication to enter between slide block and chute, thus cause the abrasion of slide block and chute, The technological deficiency that the equipment that affects normally uses.

For solving above-mentioned technical problem, this utility model provides a kind of plunger displacement pump, including:

Motor；

Crankcase, forms the bent axle groove for installing bent axle in described crankcase, and the slide block being connected with plunger is made past The multiple chute slided；

It is arranged on described in described crankcase in bent axle groove:

Bent axle, described bent axle is driven by described motor output shaft and rotates；

It is arranged on described in described crankcase in chute:

Connecting rod, its one end is connected with described crank rotation, and the other end is fixing connects described slide block, with the band at described bent axle Under Dong, described slide block is driven to reciprocatingly slide in described chute；

Plunger, is connected with described slide block, moves back and forth, thus realize under the drive of described slide block in high pressure cylinder sleeve Imbibition and discharge opeing；

Also include lubricating system, described gear oil pump, and connect the circulating lubricating oil road of described gear oil pump, described tooth Wheel oil pump trend lubricating oil is through described grease pump, so that the moving component in described plunger displacement pump is carried out forced feed lubrication.

In above-mentioned plunger displacement pump, described lubricating system also includes external oil cooling but device, and described external oil cooling but device is with described Circulating lubricating oil road is connected, and cools down the lubricating oil through described external oil cooling but device.

In above-mentioned plunger displacement pump, also include connecting rod lubrication oil circuit and slide block lubricant passage way, described connecting rod lubrication oil circuit and institute State slide block lubricant passage way to respectively parallel on described circulating lubricating oil road.

In above-mentioned plunger displacement pump, described connecting rod lubrication oil circuit by the gap between bearing shell and the described bent axle of described connecting rod, Gap between the slider pin that the inside of described connecting rod extends on the other end of described connecting rod and described slide block, thus right The two ends of described connecting rod are lubricated respectively.

In above-mentioned plunger displacement pump, described slide block lubricant passage way includes the profit offered on the described chute above by described slide block Slide-through road, described circulating lubricating oil road is through described slide block lubricant passage way.

In above-mentioned plunger displacement pump, described circulating lubricating oil route connects the oil inlet pipe of described gear oil pump, flowline respectively And the passage being positioned on described crankcase is constituted.

In above-mentioned plunger displacement pump, described circulating lubricating oil road is additionally provided with oil circuit plinth, oil pressure sensor, oil filtration Device, fuel level sensor, oil temperature sensor, oil pump relief valve and oil gauge.

In above-mentioned plunger displacement pump, described bent axle also forming crankshaft oil-way, described crankshaft oil-way includes into Type radial passage in described supporting, and the axial passage being molded in the bearing shell between described supporting, described axle The radial passage of its both sides it is respectively communicated with to passage；

Also include the oil outlet being extended to described axial passage by the surface of described bearing shell.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, below by right In detailed description of the invention or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below In accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of crankcase in this utility model embodiment；

Fig. 2 is the force analysis schematic diagram of slide block in existing crankcase；

Fig. 3 is crankcase slide block force analysis and the contrast of existing crankcase slide block force analysis during this utility model is implemented Schematic diagram；

Fig. 4 is the cross-sectional schematic of split type crankcase in this utility model embodiment；

Fig. 5 is the cross-sectional schematic of one-piece crankshaft case in prior art；

Fig. 6 is the bent axle force analysis figure using double base in prior art；

Fig. 7 is the bent axle force analysis figure using three supportings in prior art；

Fig. 8 is the force analysis figure of six supportings in this utility model embodiment；

Fig. 9 be this utility model be the cross-sectional schematic of plunger in embodiment；

Figure 10 is the cross-sectional schematic of slide block of the prior art；

Figure 11 is the cross-sectional schematic of slide block in this utility model embodiment；

Figure 12 is the cross-sectional schematic of the imbibition-discharge opeing of head portion in prior art；

Figure 13 is the cross-sectional schematic of the imbibition-discharge opeing of head portion in this utility model embodiment；

Figure 14 is the structural representation that in prior art, crankcase and motor are attached on collet by foundation bolt；

Figure 15 is the structural representation that in this utility model embodiment, crankcase and motor are installed on collet；

Figure 16 is the cross-sectional schematic of pedestal in this utility model embodiment；

Figure 17 is the structural representation of lubricating system in prior art；

Figure 18 is the structural representation of lubricating system during this utility model is implemented；

Figure 19 is the structural representation of bent axle internal lubrication oil circuit；

Figure 20 is the structural representation of emulsion power pack.

Description of reference numerals:

10-motor；20-crankcase；31-bent axle；33-plunger；34-connecting rod；35-slide block；36-high pressure cylinder sleeve；21- A part；22-Part II；311-supports；331-plunger body；332-protects head；333-plunger connector；351-slide block set； 352-slider body；353-open slot；354-slider pin；355-bolt；23-liquid sucting valve；24-tapping valve；Before 25-pump head Cover plate；26-pump head；40-support；50-collet；41-installed surface；312-connecting rod lubrication oil circuit；313-slide block lubricant passage way； 51- Imbibition is responsible for；52-returns liquid supervisor.

Detailed description of the invention

Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that described Embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, this The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, broadly falls into this practicality Novel protected scope.

In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, be only Must have specific for the ease of describing this utility model and simplification description rather than instruction or the device of hint indication or element Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Language concrete meaning in this utility model.

As long as additionally, technical characteristic involved in this utility model difference embodiment disclosed below each other it Between do not constitute conflict just can be combined with each other.

Embodiment 1

The present embodiment provides a kind of plunger displacement pump, and with reference to Fig. 1, the plunger displacement pump of the present embodiment includes that motor 10 (does not shows in Fig. 1 Show) and crankcase 20, forming the bent axle groove for installing bent axle 31 and chute in crankcase 20, bent axle 31 rotates and is arranged on song In axial trough, and can rotate under the driving of motor 10.

Being provided with plunger 33, slide block 35 and connecting rod 34 in described chute, wherein plunger 33 is positioned at chute foremost, its Fixing with the front end of slide block 35 being connected, the rear end of slide block 35 is rotationally connected with connecting rod 34, the other end of connecting rod 34 then with bent axle 31 It is rotationally connected.So when motor 10 drives bent axle 31 to rotate, connecting rod 34 then can band movable slider 35 and plunger 33 at chute Inside move back and forth, thus the imbibition and discharge opeing for plunger displacement pump provides power.

In the present embodiment, the center of rotation of bent axle 31 is vertically lower than the position of center line of chute, that is to say Bent axle 31 drives the slide block 35 in chute to move back and forth on relatively low position.And preferably at the rotary course of bent axle 31 In, the excursion of connecting rod 34 and horizontal direction angle changes between 5-10 °.As a example by the plunger displacement pump of applicant's design, The excursion of guarantee connecting rod 34 and horizontal direction angle is between 5-10 °, then the center of rotation of preferred bent axle 31 is in vertically side Upwards less than the centrage 5-15mm of chute, the center of rotation in the vertical direction of such as bent axle 31 can be less than chute centrage 5mm, 10mm or 15mm, the most most preferably 10mm at this.Although in above-mentioned preferred implementation, connecting rod 34 and horizontal direction angle Excursion between 5-10 °, it is not limited to this, it is clear that on the emulsion plunger of different displacements, the length of connecting rod To there is different designs in degree, in the case, those skilled in the art can be by the variable angle model of connecting rod 34 and horizontal direction Enclose and make accommodation, but it should belong among the design of this enforcement utility model to be protected.

So design is advantageous in that: with reference to shown in Fig. 2, existing bent axle 31 center of rotation and chute centrage are contour The principle schematic of plunger displacement pump in set-up mode:

During imbibition: plunger 33 owing to not acted on by emulsion fluid pressure, therefore plunger 33 and slide block 35 base Originally will not be under pressure effect；

During discharge opeing: plunger 33 promotes emulsion to discharge, its end face is by face area and emulsion fluid pressure The pressure effect of value product, is therefore subject to more than above-mentioned plunger 33 end face when connecting rod 34 gives the horizontal separation of slide block 35 active force Fluid pressure time, plunger 33 just can complete discharge opeing, and in FIG, it is F that connecting rod 34 gives the power of slide block, and its horizontal component is In the F1 of fluid pressure, vertical component is F2, and therefore slide block can be multiplied by coefficient of friction between slide block 35 and chute by F2 and rubbed Wiping power effect, when angle between F and horizontal plane is the biggest, this frictional force is the biggest, that is to say that slide block 35 the most easily weares and teares.

In the present embodiment with reference to shown in Fig. 3, bent axle 31 center of rotation is less than plunger in the set-up mode of chute centrage The principle schematic of pump；

During discharge opeing: after the center of rotation of bent axle 31 moves down, connecting rod 34 give power F of slide block 35 and horizontal plane it Between angle reduce the most therewith, thus compared to existing design, effectively reduce rubbing between slide block 35 and chute Wiping power, it is to avoid rapid wear during slide block use.And cut, when moving down due to the center of rotation of bent axle 31, described F horizontal direction Component increased so that F has declined with joint efforts, improve bent axle 31 and promote the efficiency of slide block 35.

In sum, the plunger displacement pump of the present embodiment can reduce the frictional force that slide block 35 is subject to during discharge opeing, thus Avoid slide block 35 to be worn, improve the service life of equipment, and contribute to shortening the maintenance frequency.

Embodiment 2

The present embodiment is the improvement on the basis of embodiment 1, and it is compared to the difference of embodiment 1:

With reference to Fig. 4, in the present embodiment, crankcase 20 is split-type structural, and it includes mutually fastening first be installed together Part 21 and Part II 22, preferably Part I 21 and Part II 22 are respectively provided with general bent axle groove, by Part I 21 Constituting complete bent axle groove after mutually fastening installation with Part II 22, so setting is advantageous in that, Part I 21 and the After two parts 22 separate, bent axle 31 can be taken out from bent axle groove.

As one preferred embodiment, on the longitudinal cross-section of Part I 21 and Part II 22, both combinations Face is the straight line between horizontal plane in 45 ° of angles.Part I 21 and Part II 22 can be by fastenings such as connecting bolts Part is attached, thus keeps being relatively fixed.

With reference to the cross-sectional side view of the one-piece crankshaft case shown in Fig. 5, the installation method of this crankcase is: 1, at bent axle Bearing is installed on 31；

2, the bent axle installing bearing is penetrated casing from the hole of crankcase 20 side；

3, bearing is adjusted in the dead eye to crankcase 20.

In this installation process, in order to make bent axle 31 be easier in the hole of incoming crankcase, need crankcase 20 both sides Hole machined become size to be more than the form of bearing outside diameter, recycling is enclosed within the bearing holder (housing, cover) outside bearing, and bent axle 31 is fixed on case Internal, it is clear that for its crankcase 20 split type compared in the present embodiment, installation process is the most loaded down with trivial details.When on bent axle 31 When there is three supportings 311, after needing first middle bearing installation to be put in place, the bearing of both sides is being installed, due to bent axle 31 Weight is relatively big, is in general only capable of assisting to install by engineering machinery, and therefore it is compared to the peace of above-mentioned double base bent axle 31 Dress difficulty be greatly increased, and support quantity reach 4 or more time, the most substantially again bent axle 31 can not be loaded bent axle In case 20.

In existing emulsion plunger, plunger 33 usually two or three, the supporting on bent axle 31 is two or three Individual.With reference to the double base bent axle shown in Fig. 6 and Fig. 7 and the principle schematic of three supporting bent axles.Because of bending stress and flexural deformation, Proportional with the distance of active force to supporting-point, the distance of active force to supporting-point is the biggest, then flexural deformation should with bending Power is the biggest.Therefore shortening active force is to the distance of supporting-point, just can effectively reduce bent axle 31 diastrophic Bending Influence power, Reach to improve the purpose of the strength and stiffness of bent axle 31.

In reference Fig. 6, the stressing conditions of the bent axles of two supportings, there are three plungers 33 simultaneously to bent axle 31 generation effect Power, the counter-force that supporting is provided acts on the power on bent axle 31 more than single plunger, and the ultimate range of active force to supporting-point is The half of overall length.The bending stress of bent axle 31 is maximum, and the sensitivity simultaneously changed plunger 33 amount of force is also the most relatively Greatly, when the operating pressure of emulsion pump exceeds preset range, it is easy for causing bent axle 31 can not bear active force and rupture.For Make bent axle 31 meet the demand of strength and stiffness, use two bent axles 31 supported to need to increase the diameter of bent axle, therefore its Processing and manufacturing is relatively costly, installation difficulty is relatively big and later maintenance difficulty is the biggest.

With reference in Fig. 7, the stressing conditions of the bent axle of three supportings, the distance maximum of active force to supporting-point is 0.3L (wherein L is the length that bent axle 31 is axial), between two supportings, be up to two plungers produce active force to bent axle simultaneously, by Reducing 40% in distance, and active force decreases 33%, two totals will make the bending stress of bent axle 31 reduce by 2.5 times. Sensitivity when plunger 33 amount of force changes also correspondingly reduces simultaneously.Thus it is effectively increased the strong of bent axle 31 Degree and rigidity, it is possible to save steel to a certain extent.But this bent axle is being applied to ten-million-ton scale above coal mining output operating mode In, still can not meet demand.

In reference Fig. 8, the stressing conditions of the bent axles 31 with six supportings related in the present embodiment, any one plunger The active force of 33 is 0.1L to the distance of supporting-point, and distribution of forces is uniform, has and only between any two supports There is the active force of a plunger 33.Owing to the distance of active force to supporting-point is reduced into 0.1L, and active force only one of which post The active force of plug, the bending stress making bent axle is reduced to the 1/15 of only double base bent axle by this, the 1/6 of three supporting bent axles, It is thus possible to abatement bending stress significantly is for the impact of bent axle 31, it is effectively improved the strength and stiffness of bent axle 31.

From above-mentioned double base and the contrast of three two kinds of bent axle 31 set-up modes of supporting, the supporting quantity on bent axle 31 is more Many, the stiffness and strength of bent axle 31 is the biggest, but the unitary design of existing crankcase 20 can not meet four supporting or more The bent axle 31 of multi-support loads.The most there is not this problem in the split type crankcase 20 of the present embodiment, only needs in its installation process After Part I 21 being disassembled from Part II 22, then the bent axle 31 installing bearing is directly directed at bent axle groove puts Enter, finally Part I 21 is reinstalled on Part I 21.As can be seen here, the crankcase of the present embodiment can be fitted Answer the bent axle 31 of multi-support 311, it is possible to effectively solve the technological deficiency that in existing plunger displacement pump, bent axle 31 strength and stiffness are not enough.

The most in the present embodiment, bent axle 31 is preferably provided with six supportings 311, and six supportings 311 are by bent axle 31 It is divided into equidistant five sections in its longitudinal direction.Corresponding, the number of plunger 33 is five, and each plunger 33 is respectively It is connected on the bent axle 31 between adjacent two supportings 311 by means of the slide block 35 on connecting rod 34 and connecting rod 34.

Additionally, for the rigidity and the intensity that promote bent axle 31 further, bent axle 31 preferably employs forging molding, forging processing Feature be the seriality that can guarantee that metal fibrous tissue, make the dimension fibrous tissue of forging keep consistent with forging profile, metal Streamline is complete, it is ensured that part has good mechanical property and long service life.In order to preferably improve the performance of product, Change bent axle 31 changes work method, uses Forging Technology, preferably retains raw-material metallic fibrous layer and is not destroyed, material The cross-sectional profile of the bent axle after completing followed by grain structure, thus the pressure that acts on bent axle each point on can be greatly decreased, Ensure that the intensity of material, thus improve the performance of product, have intensity height, dependable performance, life-span length, manufacturing time and The advantages such as manufacturing cost is substantially reduced.Solving the conventionally employed direct machine-shaping of round steel bar, bar adds trade union and destroys original Metallic fibrous layer, causes intensity to reduce, thus reduces serviceability and the life-span of bent axle 31.

Although it should be noted that the split-type design of the crankcase 20 in the present embodiment is for more convenient multi-support The bent axle 31 of 311 loads, but is not meant to that it is only capable of the bent axle 31 installing multi-support 311；The present embodiment is not meant that yet Plunger displacement pump in, be only capable of use multi-support 311 bent axle 31.Those skilled in the art have the ability according to actual use demand The concrete set-up mode of crankcase 20 and bent axle 31 is selected.

Embodiment 3

The present embodiment is the improvement on the basis of embodiment 1 or embodiment 2, and it is compared to the difference implementing 1 or 2:

With reference to the structural representation of the plunger 33 shown in Fig. 9, plunger 33 includes plunger body 311 and is arranged on plunger body Protection 332 on 331.When plunger displacement pump is after life-time service, and the end of plunger 33 easily produces abrasion, thus it is close to destroy it Feng Xing, causes inefficiency during imbibition and discharge opeing, even easily causes device damage time serious.Due in the present embodiment The setting of protection 332, after protection 332 abrasion, can directly change protection 332, without by complete for crankcase 20 After full dismounting, by plunger 33 integral replacing, so not only increase maintenance efficiency, also reduce maintenance difficulty and maintenance cost.

It addition, plunger body 331 there is a problem that, existing plunger body 331 is generally made up of metal material, Such as steel etc., after Overheating Treatment, its hardness is also only capable of reaching about 55HRC, and plunger body 331 is one and is frequently subject to The parts of power, therefore during long-term use, plunger body 331 is easy for the problem such as crowfoot cracks, breakage occur.To this end, this Plunger body 331 in embodiment preferably employs ceramic material and makes, particularly the hardness ceramic material more than 70HRC.

Describing in detail in the present embodiment below in conjunction with Fig. 9, plunger body 331 and the connected mode of protection 332, plunger is originally Body 331 and protection 332 axially form corresponding through hole respectively along it, and the plunger connector 333 being connected with slide block sets It is equipped with in the corresponding screwed hole of through hole, screw rod is connected to plunger connector through plunger body 331 and protection 332 rear thread In the screwed hole of 333, such screw rod i.e. completes plunger body 331 and the fixing connection of protection 332, and is connected by plunger 33 Receive on slide block 35.Obviously, in plunger 33, the connected mode of plunger body 331 and protection 332 is not limited only to this one, by More in connected mode, the most too much repeat at this.

In conjunction with the embodiments 1 and embodiment 2, the motor process of plunger 33 is as follows:

During imbibition: bent axle 31 rotarily drives slide block 35 and retreats, the plunger connector 33 of slide block 35 end pulls screw rod, To drive plunger body 331 and protection 332 together to retreat, so that plunger 33 is relative to being fixedly connected on pump head in plunger displacement pump On high pressure cylinder sleeve 36 relative motion so that forming negative pressure in the cavity of the opposite side of protection 332, due to liquid sucting valve and discharge opeing Valve is check valve, and therefore emulsion can be inhaled in cavity；

During discharge opeing: bent axle 31 continues to rotarily drive slide block 35 and advances, and now the emulsion in cavity can not be from suction Liquid valve is discharged, under the effect of plunger 33 in tapping valve is drained into exhaust chamber, thus imbibition and discharge opeing can only be completed Process.

Embodiment 4

The present embodiment is the improvement on the basis of embodiment 1,2 or 3, and it is compared to the difference of embodiment 1,2 or 3:

With reference to the structural representation of slide block in the prior art of Figure 10, existing slide block typically uses all-in-one-piece cast aluminium to tie Structure, the slider pin for being rotationally connected connecting rod 34 is to carry out positioning at the two ends nylon plug of through hole, the cunning of this structure Its simple in construction of block, light weight, setback pin and cost are relatively low, but it has the disadvantage in that owing to the hardness of cast aluminium is relatively low, The surface of oil sealing mating part strong with Gree is easily scratched by oil sealing, thus produces oil leakage phenomenon, affects the normal work of pump, needs The slide block damaged is replaced.Again because the operation being replaced slide block in all-in-one-piece crankcase 20 is the most numerous Trivial, need whole for the connection between the bent axle 31 in crankcase 20, connecting rod 34 and slide block 35 and slide block 35 and plunger 33 Just can be replaced after removing, therefore it changes difficulty and maintenance cost is the highest.On the other hand, the quality of fit of slider pin is wanted Ask the highest, because the intensity of aluminum and hardness all ratios are relatively low, so the necessary interference fit of slider pin wherein can be reliable and stable Fixing, otherwise deformation easily occurs for installing the pore volume of slider pin on slide block, therefore its assembly difficulty is the highest.

Easily scratch leakage of oil to solve sealing surfaces present in existing slide block 35, change slide block difficulty and slider pin Fit clearance be not easy the defect that eliminates, with reference to Figure 11, the slide block 35 in the present embodiment includes slider body 352, Yi Jike The slide block set 351 being arranged on slider body 352 external diameter of dismounting, and make described slide block set 351 and described cunning by securing member Block body 352 keeps fixing.And preferably slider body 352 is supported by high-strength cast iron, because of the thermal coefficient of expansion of high-strength cast iron Less than the thermal coefficient of expansion of cast aluminium, deformation is less likely to occur the slider body 352 therefore supported by high-strength cast iron, its size Stability more preferable, comprcssive strength, hardness and wearability, also superior to cast aluminium, contribute to extending the service life of slide block 35.Institute Stating slide block set 351 to preferably employ rustless steel and make, rustless steel its case hardness after heat treatment can reach about HRC55, compares Being greatly improved hardness for cast aluminium, in use surface is not easy to be scratched, and service life is longer.Even if at slide block Overlap in the case of 351 surfaces are scratched, it is also possible to change slide block set 351 easily.Slide block set 351 during actual use Replacing need not dismantle the Part I 21 in crankcase 20, but can be directly from the position pair of the separate cavities of crankcase 20 Slide block set 351 is replaced, and therefore its later maintenance is the most very convenient.

Specifically, describing the connected mode between slider body 352 and slide block set 351 in detail in conjunction with Figure 11, slide block is originally The end of body 352 forms screwed hole, and plunger connector 333 is to forming threaded rod, the cylindrical of plunger connector 333 by screwed hole Screw thread is formed on side face；Securing member is locking nut, and described locking nut is by described plunger connector 333 outer circumference surface Described slider body and slide block set 351 are fixed together by screw thread.

Further, in order to make slider body 352 and slide block set 351 stablize and coordinate accurately, described slider body 352 wraps Including the first end (left end of diagram) and for installing the second end of described slide block set 351, the diameter of described second end is less than described Form on first end diameter, and described second end and agree with the First terrace of described slide block set 351 thickness and less than described the The second step face of one step surface (a layer higher in two step surfaces)；

Slide block set 351 one end is resisted against on described First terrace, and the other end forms and is pressed on described second step face On pressure section.So arrange and be advantageous in that: relative securement between slide block set 351 and slider body 352, and be not easy Existing gap.

Further, in order to ensure the sealing in gap between slide block set 351 and slider body 352, in slide block set 351 and institute State the sections inner side that First terrace leans and form cannelure, in described cannelure, be provided with sealing ring.

In the present embodiment, slide block 35 connects one end of connecting rod 34 and forms the open slot 353 for accommodating connecting rod 34 end, Open slot 353 has two sidewalls being oppositely arranged；Through hole on two sidewalls is equipped with slider pin 354, connecting rod 34 with Slider pin 354 is rotationally connected.In order to ensure that slider pin 354 is firmly installed in open slot 353, at two described sidewalls End is also respectively facing described slider pin 354 and is provided with screwed hole, and bolt 355 is arranged in screwed hole, thus to described Slider pin 354 is biased power.The corresponding described bolt 355 of slider pin 354 is provided with recessed locating slot.Bolt 355 not monoenergetic position to slider pin 354, additionally it is possible to eliminate the gap produced because dimensional tolerance is different with the through hole on sidewall, Thus slider pin is pushed to its main force part, and be firmly pressed against on the sidewall of slide block 35 through hole, thus prevent slider pin 354 generations loosen, and improve precision and the reliability of assembling.Small owing to existing between the through hole on slider pin 354 and sidewall Gap, therefore compared to the assembling mode of existing interference fit, its assembly difficulty is the lowest, it is simple to install and the later stage tie up Protect.

Embodiment 5

The present embodiment be arbitrary in embodiment 1-4 on the basis of improvement, it is compared to the difference of embodiment 1-4:

With reference to the structural representation of the existing pump head component shown in Figure 12, its liquid sucting valve and tapping valve are cone valve knot Structure, using the mode of upper and lower layout, the advantage of this arrangement is concentricity height, good airproof performance, compact conformation etc..But its There is also following shortcoming: the first, the first liquid sucting valve of lower section such as occurs that damage removes inconvenience when needing to change, and first will need Heavy pump head disassembles, and after the multiple parts outside by pump head are removed one by one, then carries out the parts such as internal liquid sucting valve Changing, maintenance difficulties is the biggest.The second, the spigot surface of spool is inserted in the hole of valve seat, occupies the area of flow section, from And limit its range.If hole is oversize, then spool becomes heavy, and motility is affected, and imitates the volume of pump Rate has a negative impact.

With reference to the structural representation of pump head component in the present embodiment shown in Figure 13, in the plunger displacement pump of the present embodiment, high pressure Imbibition passage that the inner chamber of cylinder sleeve 36 is respectively communicated with in pump head 26 and apocenosis passage, described imbibition passage and apocenosis passage connect respectively Logical imbibition chamber and exhaust chamber；Described imbibition passage and apocenosis passage are respectively arranged with liquid sucting valve 23 and tapping valve 24；Described imbibition Valve 23 is flap type, and its bearing of trend being perpendicular to described chute is arranged, and is additionally provided with pump head in the outside of described liquid sucting valve 23 Front shroud 25, forms the passage for connecting described imbibition chamber in described pump head front shroud 25.Its arrangement is: tapping valve 24 are arranged in top, and liquid sucting valve 23 is arranged in side, the protecgulum before so only needing pump head when needing and changing liquid sucting valve 23 After plate 25 is removed, can be replaced.

Owing to liquid sucting valve 23 and tapping valve 24 are flap type, its compared to for cone valve not only volume and weight have and subtract Little, and it is adapted for mount on the side of pump head, to liquid sucting valve 23 by the way of above dismounting pump head end cap It is replaced.Amass it addition, flap type will not take flow section, be thus advantageous to improve liquid sucting valve 23 and the discharge opeing of tapping valve 24 With imbibition efficiency, and the sensitivity of enhancing action.

Embodiment 6

The present embodiment be arbitrary in embodiment 1-5 on the basis of improvement, it is compared to the difference of embodiment 1-5:

In actual use, crankcase 20 and motor 10 when mounted, must be by the output shaft of motor 10 and songs The power shaft of axle box 20 adjusts the position to mutual centering, otherwise will in use produce vibration and noise, impact song Axle box 20 and the work efficiency of motor 10 and service life.A kind of relatively conventional set-up mode is: song as shown in figure 14 Axle box 20 and motor 10 use the structural representation that lower margin formula connects, and it is by crankcase 20 and electricity with respective foundation bolt Motivation 10 is fixed on same collet, and its advantage is that maintenance is more convenient and flexible with when installing, it is not necessary to by lifting appliance Just motor 10 and crankcase 20 can be installed on collet 50.Its centering method is, prizes crankcase 20 respectively with crowbar With motor 10, adjusted both centerings by the external diameter of inspection shaft coupling, for the plunger displacement pump of middle-size and small-size flow, because of it Volume and weight is all little, and the most this centering regulative mode is effective, but for the plunger displacement pump of big flow, its body Long-pending the biggest with weight, use the mode manually prized to be adjusted the most difficult.Also need to during centering simultaneously Carry out adjustment repeatedly and inspection, centering degree and efficiency, depend on the working experience of operator.

With reference to Figure 15 and Figure 16, the plunger displacement pump of this enforcement also includes support 40 and collet 50, and wherein support 40 is vertically fixed It is arranged on described collet.The both sides of support 40 are respectively installed surface 41, motor 10 and crankcase 20, the most solid Dingan County is contained on installed surface 41；Output shaft and the bent axle 31 of the corresponding described motor 10 of support 40 are provided with respective installing hole, So that motor 40 docks mutually with described crankcase 20.As one preferred embodiment, the output shaft of motor 10 and The power shaft of crankcase 20 is being connected by shaft coupling after docking, and then the power shaft of crankcase 20 can be led to again Cross decelerator or gear train drive disk assembly band dynamic crankshaft 31 rotates.Specifically, two installed surfaces 41 offer positional symmetry in advance Installation screwed hole, the output shaft of motor 10 and the power shaft of described crankcase 20, achieved a butt joint by shaft coupling.Support 40 there is rectangular four corner, corner location is fixed with described collet 50 by coupling bolt and is connected.In the present embodiment Preferably support 40 is hollow support body, because the contact area of the support 40 of this structure is less, in order to increase the stability of equipment, Preferably support 40 is fixed on collet 50.

Technique scheme is the core technology scheme of the present embodiment, and it is by crankcase 20 and the end face of motor 10 On be respectively arranged with in advance one connect boss circle, by this boss circle respectively insert support 40 two ends mounting-positioning holes In, more respectively motor 10 and crankcase 20 are fixed on support 40 with bolt on end face, thus ensure crankcase 20 Centering with motor 10.Being positioned to add and have determined that alignment man-hour because of support 40 both sides, therefore motor 10 He Crankcase 20 is without adjusting through centering again.It should be noted that those skilled in the art obviously can also is that at motor 10 and crankcase 20 on be respectively provided with the mode of detent in advance both first pre-fixed, repeat the most one by one at this. As can be seen here, the plunger displacement pump of the present embodiment has and installs simple, reliable, crankcase 20 and high excellent of motor 10 accuracy of alignment Point, and do not rely on technical merit and the experience of operator.

Embodiment 7

The present embodiment be arbitrary in embodiment 1-6 on the basis of improvement, it is compared to the difference of embodiment 1-6:

Current existing plunger displacement pump generally uses between bent axle 31 and connecting rod 34 and use forced feed lubrication, i.e. note in oil circuit Enter lubricating oil so that it obtains lubrication, between slide block 35 and chute, then use splash lubrication, with reference to Figure 17, the profit of bent axle 31 Cunning is to deliver lubricating oil in the through hole in the middle of bent axle 31 by gear pump, and one horizontal stroke of oil is bored in each bearing shell centre position respectively Through hole in the middle of aperture and bent axle 31 communicates, then by horizontal aperture, delivers lubricating oil to the surface of bearing shell, make bearing shell Lubrication is obtained with the axle journal of bent axle 31.In the work process of bent axle, its turning effort will drive lubricating oil adhered thereto Get rid of the upper oil sump to crankcase, then by the aperture in upper oil sump, lubricating oil is delivered to the surface of slide block 35, thus completes sliding The lubrication of block.This splash lubrication mode have the disadvantage that when plunger displacement pump install status the most at ordinary times, in slide block 35 relatively High position is difficult to obtain lubrication, and the other end of connecting rod 34 is also not readily available lubrication, thus is easily caused slide block 35 He Chute sinters, and then crankcase 20 is damaged, and the foreign material in upper oil sump also readily penetrate through aperture and enter into slide block Between 35 and chute, cause chute abrasion etc..

In order to solve defect present in existing splash lubrication, respectively to slide block 35 He in the lubricating system of the present embodiment Bent axle 31 carries out forced feed lubrication respectively, comprising: include lubricating system, and described gear oil pump, and connect described gear oil pump Circulating lubricating oil road, described gear oil pump trend lubricating oil is through described grease pump, with to the motion in described plunger displacement pump Parts carry out forced feed lubrication.

Technique scheme is the core technology scheme of the present embodiment, by the setting on circulating lubricating oil road so that circulation Lubricating oil in lubricant passage way, during it flows, carries out forced feed lubrication to all moving components flowed through.And in order to keep away Exempt from the high oil temperature of lubricating oil, circulating lubricating oil road is also associated with external oil cooling but device, described external oil cooling but device and institute State circulating lubricating oil road to be connected, thus the lubricating oil through described external oil cooling but device is cooled down.

Specifically, with reference to Figure 18, described circulating lubricating oil route connects the oil inlet pipe of described gear oil pump, flowline respectively And the passage being positioned on described crankcase 20 is constituted.It is by connecting rod lubrication oil circuit 312 and slide block lubricant passage way 313 difference And be connected on described circulating lubricating oil road, thus complete to connecting rod 34, connecting rod 34 one end connect bent axle 31, connecting rod 34 another Lubrication between slide block and slide block 35 and chute that end connects.Connecting rod lubrication oil circuit 312 is by the bearing shell of described connecting rod 34 and institute State the gap between bent axle 31, extend on the other end and the described slide block 35 of described connecting rod 34 through the inside of described connecting rod 34 Slider pin 354 between gap, thus the two ends of described connecting rod 34 are lubricated respectively.Described slide block lubricant passage way 313 Including by the lubrication channel offered on the described chute above described slide block 35, described circulating lubricating oil road is moistened through described slide block Lubricating oil road 313.Owing to lubricating oil power in oil circuit comes from gear oil pump, the most no matter installation site is the most smooth, all Do not interfere with the lubricant effect of lubricating oil.And above-mentioned slide block lubricant passage way 313 and the motion of 312 processes of connecting rod lubrication oil circuit Clothes are totally-enclosed setting, and dust and other impurities will not enter into the surface of kinematic pair during lubricating again, it is possible to keep equipment Clean, improve service life.

Additionally, be additionally provided with oil circuit plinth, oil pressure sensor, oil strainer, oil level biography on described circulating lubricating oil road Sensor, oil temperature sensor, oil pump relief valve and oil gauge.

Below with reference to Figure 19, the lubricant passage way on bent axle in the present embodiment 31 is described in detail:

A1 in figure；A2；A3；A4；A5 represents longitudinal hole.B1；B2；B3；B4；B5 represents transverse holes, A1, A2, A3, A4, A5 is distributed on one circumference on cross section, and A1, A2 are positioned at same one end of bent axle 31, and A3, A4, A5 are positioned at the another of bent axle 31 One end, B1, B2, B3, B4 are positioned on each crank.B5 is drilled on the cylindrical installing bearing, that is to say between two supportings.Bent axle The oilhole of neck 1 and maneton 2 is by longitudinal hole A1 and A2, then by transverse holes B1, it is through；Maneton 2,3,4,5 In like manner.The advantage of this setup is: lubricant passage way, in the inner position of bent axle 31, does not interferes with the size of bent axle, with And the overall dimensions of bearing so that bent axle 31 is no need to the setting of lubricant passage way and increased in size, contributes to reducing plunger Pump weight.But the hole knockout of the lubricant passage way being not meant on bent axle is only limitted to one of the above.

Embodiment 8

With reference to Figure 20, the present embodiment provides a kind of emulsion power pack, and it includes implementing plunger displacement pump arbitrary in 1-7, wherein, Several plunger displacement pumps are successively set on collet 50, and the both sides of described collet 50 are respectively arranged with and connect imbibition chamber and exhaust chamber Imbibition supervisor 51 and time liquid supervisor 52, described imbibition supervisor 51 is additionally provided with booster pump；The imbibition of every described plunger displacement pump is led to Road and apocenosis passage are connected to described imbibition supervisor 51 and return on liquid supervisor 52.So multiple stage plunger displacement pump of emulsion power pack Same pipette can be used to connect a booster pump to realize feed flow；The multiple stage pump of emulsion pump uses same to unload back liquid Pipe realizes back liquid, improves the efficiency of supply of emulsion.

Claims (8)

1. a plunger displacement pump, including:

Motor (10)；

Crankcase (20), forms the bent axle groove for installing bent axle (31) in described crankcase (20), and with plunger (33) phase Slide block (35) even makees the chute reciprocatingly slided；

It is arranged on described in described crankcase (20) in bent axle groove:

Bent axle (31), described bent axle (31) is driven by described motor (10) output shaft and rotates；

It is arranged on described in described crankcase (20) in chute:

Connecting rod (34), its one end is rotationally connected with described bent axle (31), and the other end is fixing connects described slide block (35), with described Under the drive of bent axle (31), described slide block (35) is driven to reciprocatingly slide in described chute；

Plunger (33), is connected with described slide block (35), reciprocal in high pressure cylinder sleeve (36) under the drive of described slide block (35) Motion, thus realize imbibition and discharge opeing；

It is characterized in that:

Also including lubricating system, gear oil pump, and connect the circulating lubricating oil road of described gear oil pump, described gear oil pump drives Make lubricating oil through described lubricant passage way, so that the moving component in described plunger displacement pump is carried out forced feed lubrication.

Plunger displacement pump the most according to claim 1, it is characterised in that:

Described lubricating system also includes that external oil cooling but device, described external oil cooling but device are connected with described circulating lubricating oil road, And the lubricating oil through described external oil cooling but device is cooled down.

Plunger displacement pump the most according to claim 1 and 2, it is characterised in that:

Also include connecting rod lubrication oil circuit (312) and slide block lubricant passage way (313), described connecting rod lubrication oil circuit (312) and described cunning Block lubricant passage way (313) respectively parallels on described circulating lubricating oil road.

Plunger displacement pump the most according to claim 3, it is characterised in that:

Described connecting rod lubrication oil circuit (312) is by the gap between bearing shell and the described bent axle (31) of described connecting rod (34), Jing Guosuo State between the slider pin (354) that the inside of connecting rod (34) extends on the other end of described connecting rod (34) and described slide block (35) Gap, thus the two ends of described connecting rod (34) are lubricated respectively.

Plunger displacement pump the most according to claim 3, it is characterised in that:

Described slide block lubricant passage way (313) includes by the lubrication channel offered on the described chute of described slide block (35) top, institute State circulating lubricating oil road through described slide block lubricant passage way (313).

Plunger displacement pump the most according to claim 1, it is characterised in that:

Described circulating lubricating oil route connects the oil inlet pipe of described gear oil pump, flowline respectively and is positioned at described crankcase (20) passage on is constituted.

Plunger displacement pump the most according to claim 6, it is characterised in that:

It is additionally provided with oil circuit plinth, oil pressure sensor, oil strainer, fuel level sensor, oil temperature on described circulating lubricating oil road Sensor, oil pump relief valve and oil gauge.

Plunger displacement pump the most according to claim 1, it is characterised in that:

Also forming crankshaft oil-way on described bent axle (31), described crankshaft oil-way includes being molded in supporting (311) Radial passage, and the axial passage being molded in the bearing shell between described supporting (311), described axial passage is respectively communicated with The radial passage of its both sides；

Also include the oil outlet being extended to described axial passage by the surface of described bearing shell.