CN105673385A - Emulsified liquid plunger pump - Google Patents

Abstract

The invention provides an emulsified liquid plunger pump and an emulsified liquid pump station. The emulsified liquid plunger pump comprises a motor, a crankshaft case, a crankshaft, a connecting rod and a plunger. A crankshaft groove which is used for installing the crankshaft, and a sliding groove are formed in the crankshaft case. A sliding block connected with the plunger slides in the sliding groove in a reciprocating manner. The crankshaft is arranged in the crankshaft groove in the crankshaft case, and the crankshaft is driven by an output shaft of the motor to rotate. The connecting rod is arranged in the sliding groove in the crankshaft case, one end of the connecting rod is rotationally connected with the crankshaft, the other end of the connecting rod is fixedly connected with the sliding block, and therefore under driving of the crankshaft, the sliding block is driven to slide in the sliding groove in the reciprocating manner. The plunger is connected with the sliding block and driven by the sliding block to reciprocate in a high-pressure cylinder sleeve, and therefore liquid absorbing and liquid draining are achieved. The sliding block comprises a sliding block body and a sliding block sleeve detachably arranged on the outer diameter part of the sliding block body, the sliding block sleeve and the sliding block body are kept fixed through a fastening piece, and the emulsified liquid plunger pump has the beneficial effects that the sliding block is not prone to abrasion, and maintenance is convenient after abrasion.

Description

A kind of emulsion plunger

Technical field

The present invention relates to technical field of engineering machinery, be specifically related to emulsion plunger.

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 have very important significance for the safety in production and increasing economic efficiency ensureing coal enterprise. Along with coal-mining technique develops to high-tech direction, emulsion power pack be it is also proposed new requirement, not only to ensure flow and the pressure of pump, also require to ensure namely to improve service life and the reliability of pump the unfailing service time simultaneously. The emulsion pump of current largest domestic flow reaches 550L/min, but relative to high-end big fluid inlet product, it cannot meet the serviceability requirement of the above coal mining output of ten-million-ton scale, and the high-end emulsion pump of big flow fully relies on import.

With reference to the structural representation of slide block in the prior art of Figure 10, existing slide block is generally adopted all-in-one-piece cast aluminum construction, it is position at the two ends nylon plug of through hole for being rotationally connected the slider pin of connecting rod, its simple in construction of the slide block of this structure, light weight, setback pin and less costly, but it has the disadvantage in that owing to the hardness of cast aluminium is relatively low, easily scratched by oil sealing with the surface of separate cavities oil sealing mating part, thus producing oil leakage phenomenon, affect the normal operation of pump, it is necessary to the slide block damaged is replaced. Again because the operation in all-in-one-piece crankcase, slide block being replaced is very loaded down with trivial details, just being replaced after needing all to remove the connection between the bent axle in crankcase, connecting rod and slide block and slide block and plunger, therefore it changes difficulty and maintenance cost is significantly high. On the other hand, the quality of fit of slider pin requires significantly high, because the intensity of aluminum and hardness are all relatively low, so what the necessary interference fit of slider pin wherein can be reliable and stable is fixing, easily there is deformation in the pore volume being otherwise used for installing slider pin on slide block, and therefore its assembly difficulty is also higher.

Summary of the invention

Therefore, the technical problem to be solved in the present invention is in that to overcome in large-flow emulsion pump of the prior art slide block and is easily worn in chute, thus producing oil leakage phenomenon, affects the technological deficiency of the normal operation of plunger displacement pump.

For solving above-mentioned technical problem, the present invention provides a kind of emulsion plunger, including:

Motor;

Crankcase, forms the bent axle groove for installing bent axle and the chute that the slide block work being connected with plunger reciprocatingly slides in described crankcase;

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

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

It is arranged in chute described in described crankcase:

Connecting rod, its one end is connected with described crank rotation, and the other end is fixing connects described slide block, under the drive of described bent axle, to drive described slide block to reciprocatingly slide in described chute;

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

Described slide block includes slider body and dismountable slide block set being arranged on described slider body external diameter, and makes described slide block set and described slider body keep fixing by securing member.

In above-mentioned emulsion plunger, the end of described slider body forms screwed hole, and the corresponding described screwed hole of described plunger connector forms threaded rod, and the outer circumference surface of described plunger connector forms screw thread;

Described securing member is locking nut, and described slider body and slide block set are fixed together by described locking nut by the screw thread on described plunger connector outer circumference surface.

In above-mentioned emulsion plunger, described slider body includes the first end and for installing the second end of described slide block set, the diameter of described second end is less than described first end diameter, and forms the First terrace agreeing with described slide block set thickness and the second step face lower than described First terrace on described second end;

Described slide block set one end is resisted against on described First terrace, and the other end forms the pressure section being pressed on described second step face.

In above-mentioned emulsion plunger, the sections inner side that described slide block set and described First terrace lean forms cannelure, is provided with sealing ring in described cannelure.

In above-mentioned emulsion plunger, described slider body is made of cast iron.

In above-mentioned emulsion plunger, described slide block set is made of stainless steel.

In above-mentioned emulsion plunger, described slide block connects one end of described connecting rod and forms the open slot for holding described interlinking lever end, and described open slot has two sidewalls being oppositely arranged;

Being equipped with slider pin in through hole on described sidewall, described connecting rod and described slider pin are rotationally connected.

In above-mentioned emulsion plunger,

The end of two described sidewalls is also respectively facing described slider pin and is provided with screwed hole, and bolt is arranged in screwed hole, thus described slider pin is biased power.

In above-mentioned emulsion plunger, the corresponding described bolt of described slider pin is provided with recessed locating slot.

Accompanying drawing explanation

In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, the accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of crankcase in the embodiment of the present invention;

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

Fig. 3 is the contrast schematic diagram of crankcase slide block force analysis and existing crankcase slide block force analysis in the invention process;

Fig. 4 is the cross-sectional schematic of split type crankcase in the embodiment of the present invention;

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

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

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

Fig. 8 is the force analysis figure of six supportings in the embodiment of the present invention;

Fig. 9 is the present invention is 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 the embodiment of the present invention;

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 the embodiment of the present invention;

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 the embodiment of the present invention, crankcase and motor are installed on collet;

Figure 16 is the cross-sectional schematic of pedestal in the embodiment of the present invention;

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

Figure 18 is the structural representation of lubricating system in the invention process;

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-Part I; 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; 25-pump head front shroud; 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, technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.

In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention. Additionally, term " first ", " second ", " the 3rd " are only for descriptive purposes, and it is not intended that indicate or hint relative importance.

In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly; Can be mechanically connected, it is also possible to be electrical connection;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals. For the ordinary skill in the art, it is possible to the concrete above-mentioned term of reason solution concrete meaning in the present invention.

As long as just can be combined with each other additionally, technical characteristic involved in invention described below difference embodiment does not constitute conflict each other.

Embodiment 1

The present embodiment provides a kind of emulsion plunger, with reference to Fig. 1, the emulsion plunger of the present embodiment includes motor 10 (not showing in Fig. 1) and crankcase 20, the bent axle groove for installing bent axle 31 and chute is formed in crankcase 20, bent axle 31 rotates and is arranged in bent axle groove, 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, and it is fixed with the front end of slide block 35 and is connected, and the rear end of slide block 35 and connecting rod 34 are rotationally connected, and the other end of connecting rod 34 is then rotationally connected with bent axle 31. So when motor 10 drives bent axle 31 to rotate, connecting rod 34 then can band movable slider 35 and plunger 33 move back and forth in chute, thus imbibition and discharge opeing for plunger displacement pump provide 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 that bent axle 31 drives the slide block 35 in chute to move back and forth on relatively low position. And in the rotary course preferably in bent axle 31, the excursion of connecting rod 34 and horizontal direction angle changes between 5-10 °. Emulsion plunger for applicant's design, ensure that the excursion of connecting rod 34 and horizontal direction angle is between 5-10 °, then preferably the center of rotation of bent axle 31 is vertically lower than the centrage 5-15mm of chute, the center of rotation in the vertical direction of such as bent axle 31 can lower than chute centrage 5mm, 10mm or 15mm, at this then most preferably 10mm. Although in above-mentioned preferred implementation; the excursion of connecting rod 34 and horizontal direction angle is between 5-10 °; it is not limited to this; obviously on the emulsion plunger of different displacements; to there is different designs in the length of connecting rod; under these feelings, the variable angle scope of connecting rod 34 and horizontal direction can be made accommodation by those skilled in the art, but it should belong among the design of this enforcement claimed invention.

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

In imbibition process: plunger 33 is owing to not by the effect of emulsion fluid pressure, therefore plunger 33 and slide block 35 are substantially without the effect of being under pressure;

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

With reference to bent axle 31 center of rotation in the present embodiment shown in Fig. 3 lower than the principle schematic of plunger displacement pump in the set-up mode of chute centrage;

In discharge opeing process: after the center of rotation of bent axle 31 moves down, the angle that connecting rod 34 gives between power F and the horizontal plane of slide block 35 also reduces therewith, thus compared to existing design, effectively reducing the frictional force between slide block 35 and chute, it is to avoid rapid wear in slide block use procedure. And cut, when moving down due to the center of rotation of bent axle 31, the component of described F horizontal direction increases to some extent, so that the F that makes a concerted effort declines to some extent, improves bent axle 31 and promotes the efficiency of slide block 35.

In sum, the emulsion plunger of the present embodiment can reduce the frictional force that slide block 35 is subject in discharge opeing process, thus avoiding slide block 35 to be worn, improves the service life of equipment, and contributes to shortening the maintenance frequency.

Embodiment 2

The present embodiment is the improvement on embodiment 1 basis, and it is distinctive in that compared to embodiment 1:

With reference to Fig. 4, in the present embodiment, crankcase 20 is split-type structural, it includes mutually fastening the Part I 21 being installed together and Part II 22, preferred Part I 21 and Part II 22 are respectively provided with general bent axle groove, complete bent axle groove is constituted after Part I 21 and Part II 22 are fastened installation mutually, so arranging and be advantageous in that, bent axle 31 can be taken out after separating by Part I 21 and Part II 22 from bent axle groove.

As one preferred embodiment, on the longitudinal cross-section of Part I 21 and Part II 22, both faying faces are the straight line between horizontal plane in 45 ° of angles. Part I 21 and Part II 22 can be attached by securing members such as connecting bolts, thus keeping 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, install bearing on bent axle 31;

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

3, in dead eye bearing adjusted to crankcase 20.

In this installation process, in order to make bent axle 31 be easier in the hole of incoming crankcase, need to become to be sized larger than the form of bearing outside diameter by the hole machined of crankcase 20 both sides, recycling is enclosed within the bearing holder (housing, cover) outside bearing, bent axle 31 is fixed in casing, obviously its crankcase 20 split type compared in the present embodiment, installation process is more loaded down with trivial details. When bent axle 31 has three supportings 311, middle bearing is first installed after putting in place by needs, at the bearing installing both sides, owing to the weight of bent axle 31 is bigger, in general it is only capable of assisting to install by engineering machinery, therefore it is greatly increased compared to the installation difficulty of above-mentioned double base bent axle 31, and when supporting quantity and reaching 4 or be more, just substantially can not be loaded in crankcase 20 by bent axle 31 again.

In existing emulsion plunger, plunger 33 is generally two or three, and the supporting on bent axle 31 is two or three. Principle schematic with reference to the double base bent axle shown in Fig. 6 and Fig. 7 and three supporting bent axles. Because of bending stress and flexural deformation, and active force is proportional to the distance of supporting-point, and active force is more big to the distance of supporting-point, then flexural deformation is more big with bending stress. Therefore shorten active force to the distance of supporting-point, just can effectively reduce the diastrophic Bending Influence power of bent axle 31, reach to improve the purpose of the strength and stiffness of bent axle 31.

With reference in Fig. 6, the stress feelings of the bent axles of two supportings, there are three plungers 33 that bent axle 31 produces active force simultaneously, the counter-force that supporting provides acts on the power on bent axle 31 more than single plunger, and active force is to the half that ultimate range is overall length of supporting-point.The bending stress of bent axle 31 is maximum, greatly to the sensitivity of plunger 33 amount of force change also accordingly relatively, when the operating pressure of emulsion pump exceeds preset range, is easy for causing that bent axle 31 can not bear active force and rupture simultaneously. In order to make bent axle 31 meet the demand of strength and stiffness, adopting 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 also bigger.

With reference in Fig. 7, the stress feelings of the bent axle of three supportings, active force is 0.3L (wherein L is the length that bent axle 31 is axial) to the distance maximum of supporting-point, it is up to two plungers between supporting at two and bent axle is produced active force simultaneously, owing to distance reduces 40%, 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 being effectively increased the strength and stiffness of bent axle 31, it is possible to save steel to a certain extent. But this bent axle is in being applied to the above coal mining output work of ten-million-ton scale, still can not meet demand.

With reference in Fig. 8, the stress feelings of the bent axle 31 with six supportings related in the present embodiment, the active force of any one plunger 33 is 0.1L to the distance of supporting-point, and distribution of forces is uniform, has and the active force of only one of which plunger 33 between any two supports. Owing to the distance of active force to supporting-point is reduced into 0.1L, and the active force of active force only one of which plunger, 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 is for the impact of bent axle 31 significantly, it is effectively improved the strength and stiffness of bent axle 31.

Contrast from above-mentioned double base and three two kinds of bent axle 31 set-up modes of supporting, supporting quantity on bent axle 31 is more many, the stiffness and strength of bent axle 31 is also more big, but the bent axle 31 that the unitary design of existing crankcase 20 can not meet four supportings or more multi-support loads. The split type crankcase 20 of the present embodiment is then absent from this problem, its installation process only needs by Part I 21 from after Part II 22 disassembles, again the bent axle 31 installing bearing is directly directed at bent axle groove to put into, finally Part I 21 is reinstalled on Part I 21. As can be seen here, the crankcase of the present embodiment can adapt to the bent axle 31 of multi-support 311, it is possible to effectively solves the technological deficiency that in existing plunger displacement pump, bent axle 31 strength and stiffness are not enough.

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

In addition, in order to promote rigidity and the intensity of bent axle 31 further, bent axle 31 preferably employs forging molding, the feature of forging processing is the seriality that can guarantee that metal fibrous tissue, the dimension fibrous tissue making forging keeps consistent with forging profile, metal streamline is complete, it is ensured that part has good mechanical property and long service life. In order to better improve the performance of product, what change bent axle 31 changes work method, adopt Forging Technology, better retain raw-material metallic fibrous layer not to be destroyed, the cross-sectional profile of the bent axle after completing followed by the grain structure of material, thus the pressure that acts on bent axle each point on can be greatly decreased, it is ensured that the intensity of material, thus improve the performance of product, there is the advantages such as intensity height, dependable performance, life-span length, manufacturing time and manufacturing cost are substantially reduced. Solving the conventionally employed direct machine-shaping of round steel bar, bar adds trade union and destroys original metallic fibrous layer, causes that intensity reduces, thus reducing 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 in order to the bent axle 31 of more convenient multi-support 311 loads, but being not meant to it and be only capable of the bent axle 31 installing multi-support 311; Do not mean that in the plunger displacement pump of the present embodiment, be only capable of the bent axle 31 using multi-support 311 yet. Those skilled in the art have the ability according to actual user demand, the concrete set-up mode of crankcase 20 and bent axle 31 to be selected.

Embodiment 3

The present embodiment is the improvement in embodiment 1 or embodiment 2 basis, and it is distinctive in that compared to 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 the protection 332 being arranged in plunger body 331. When plunger displacement pump is after life-time service, the end of plunger 33 easily produces abrasion, thus destroying its sealing, causing inefficiency in imbibition and discharge opeing process, even easily causing device damage time serious. Due to the setting of the protection 332 in the present embodiment, after protection 332 abrasion, it is possible to directly change protection 332; after crankcase 20 is removed completely; by plunger 33 integral replacing, so not only increase maintenance efficiency, also reduce maintenance difficulty and maintenance cost.

Additionally, 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 the parts of a frequent stress, therefore, in long-term use procedure, plunger body 331 is easy for the problem such as crowfoot cracks, breakage occur. For this, the plunger body 331 in the present embodiment preferably employs ceramic material and makes, particularly the hardness ceramic material more than 70HRC.

Describe in detail in the present embodiment below in conjunction with Fig. 9; the connected mode of plunger body 331 and protection 332; plunger body 331 and protection 332 axially form corresponding through hole respectively along it; the plunger connector 333 being connected with slide block is provided with in the corresponding screwed hole of through hole; screw rod is connected in the screwed hole of plunger connector 333 through plunger body 331 and protection 332 rear thread; namely such screw rod completes plunger body 331 and the fixing connection of protection 332, and is connected on slide block 35 by plunger 33. Obviously, in plunger 33, the connected mode of plunger body 331 and protection 332 is not limited only to this one, owing to connected mode is more, does not then too much repeat at this.

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

In imbibition process: 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 high pressure cylinder sleeve 36 relative motion being fixedly connected in plunger displacement pump on pump head, so that forming negative pressure in the cavity of the opposite side of protection 332, owing to liquid sucting valve and tapping valve are check valve, therefore emulsion can be inhaled in cavity;

In discharge opeing process: bent axle 31 continues to rotarily drive slide block 35 and advances, and now the emulsion in cavity can not be discharged from liquid sucting valve, can only be drained in exhaust chamber through tapping valve under the effect of plunger 33, thus completing the process of imbibition and discharge opeing.

Embodiment 4

The present embodiment is the improvement on embodiment 1,2 or 3 basis, and it is distinctive in that compared to embodiment 1,2 or 3:

With reference to the structural representation of slide block in the prior art of Figure 10, existing slide block is generally adopted all-in-one-piece cast aluminum construction, it is position at the two ends nylon plug of through hole for being rotationally connected the slider pin of connecting rod 34, its simple in construction of the slide block of this structure, light weight, setback pin and less costly, but it has the disadvantage in that owing to the hardness of cast aluminium is relatively low, easily scratched by oil sealing with the surface of separate cavities oil sealing mating part, thus producing oil leakage phenomenon, affect the normal operation of pump, it is necessary to the slide block damaged is replaced.Again because the operation in all-in-one-piece crankcase 20, slide block being replaced is very loaded down with trivial details, just being replaced after needing all to remove the connection between the bent axle 31 in crankcase 20, connecting rod 34 and slide block 35 and slide block 35 and plunger 33, therefore it changes difficulty and maintenance cost is significantly high. On the other hand, the quality of fit of slider pin requires significantly high, because the intensity of aluminum and hardness are all relatively low, so what the necessary interference fit of slider pin wherein can be reliable and stable is fixing, easily there is deformation in the pore volume being otherwise used for installing slider pin on slide block, and therefore its assembly difficulty is also higher.

Sealing surfaces in order to solve to exist in existing slide block 35 easily scratches leakage of oil, the fit clearance changing slide block difficulty and slider pin is not easy the defect of elimination, with reference to Figure 11, slide block 35 in the present embodiment includes slider body 352, and the dismountable slide block set 351 being arranged on slider body 352 external diameter, and described slide block set 351 and described slider body 352 is made to keep fixing by securing member. And preferably slider body 352 is supported by high-strength cast iron, because the thermal coefficient of expansion of high-strength cast iron is less than the thermal coefficient of expansion of cast aluminium, therefore deformation is less likely to occur the slider body 352 supported by high-strength cast iron, the stability of its size is better, comprcssive strength, hardness and wearability, also superior to cast aluminium, contribute to extending the service life of slide block 35. Described slide block set 351 preferably employs rustless steel and makes, and rustless steel its case hardness after heat treatment can reach about HRC55, is greatly improved hardness compared to cast aluminium, and in use surface is not easy to be scratched, longer service life. Even if under the feelings that slide block set 351 surface is scratched, it is also possible to change slide block set 351 easily. In actual use procedure, the replacing of slide block set 351 need not dismantle the Part I 21 in crankcase 20, but can directly from the position of the separate cavities of crankcase 20, slide block set 351 be replaced, and therefore its later maintenance is also very convenient.

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

Further, in order to make slider body 352 and slide block set 351 stablize and coordinate accurately, described slider body 352 includes 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 first end diameter, and forms the First terrace agreeing with described slide block set 351 thickness and the second step face lower than described First terrace (one layer higher in two step surfaces) on described second end;

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

Further, in order to ensure the sealing in gap between slide block set 351 and slider body 352, the sections inner side leant at slide block set 351 and described First terrace forms cannelure, is provided with sealing ring in described cannelure.

In the present embodiment, slide block 35 connects one end of connecting rod 34 and forms the open slot 353 for holding connecting rod 34 end, and open slot 353 has two sidewalls being oppositely arranged;Being equipped with slider pin 354 in through hole on two sidewalls, connecting rod 34 and slider pin 354 are rotationally connected. In order to ensure that slider pin 354 is firmly installed in open slot 353, being also respectively facing described slider pin 354 in the end of two described sidewalls and be provided with screwed hole, bolt 355 is arranged in screwed hole, thus 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 positions to slider pin 354, the gap produced because dimensional tolerance is different can also be eliminated with the through hole on sidewall, thus slider pin being pushed to its main force part, and it is firmly pressed against on the sidewall of slide block 35 through hole, thus preventing slider pin 354 from producing to loosen, improve precision and the reliability of assembling. Owing to there is small gap between the through hole on slider pin 354 and sidewall, therefore compared to the assembling mode of existing interference fit, its assembly difficulty is also lower, it is simple to install and later maintenance.

Embodiment 5

The present embodiment is the improvement in embodiment 1-4 on arbitrary basis, and it is distinctive in that compared to 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 structure, and adopting the mode of upper and lower layout, the advantage of this arrangement is concentricity height, good airproof performance, compact conformation etc. But it there is also following shortcoming: the first, first as occurred, damage removes inconvenience when needing to change to the liquid sucting valve of lower section, need first to be disassembled by heavy pump head, after the multiple parts outside pump head are removed one by one, the parts such as internal liquid sucting valve being replaced, maintenance difficulties is quite big again. The second, the spigot surface of spool enters in the hole of valve seat, occupies the area of flow section, thus limiting its use scope. If hole is oversize, then spool becomes heavy, and motility is affected, and the volumetric efficiency of pump is had 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, the inner chamber of high pressure cylinder sleeve 36 is respectively communicated with the imbibition passage in pump head 26 and apocenosis passage, and described imbibition passage and apocenosis passage are respectively communicated with imbibition chamber and exhaust chamber; Described imbibition passage and apocenosis passage are respectively arranged with liquid sucting valve 23 and tapping valve 24; Described liquid sucting valve 23 is flap type, and its bearing of trend being perpendicular to described chute is arranged, and is additionally provided with pump head front shroud 25 in the outside of described liquid sucting valve 23, forms the passage for connecting described imbibition chamber in described pump head front shroud 25. Its arrangement is: tapping valve 24 is arranged in top, and liquid sucting valve 23 is arranged in side, after so only needing the front shroud 25 before by pump head to remove when needing to change liquid sucting valve 23, can be replaced.

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

Embodiment 6

The present embodiment is the improvement in embodiment 1-5 on arbitrary basis, and it is distinctive in that compared to embodiment 1-5:

In actual use, crankcase 20 and motor 10 are when mounted, the power shaft of the output shaft of motor 10 and crankcase 20 must be adjusted the position to mutual centering, otherwise will in use produce vibration and noise, affect work efficiency and the service life of crankcase 20 and motor 10.A kind of relatively conventional set-up mode is: the structural representation that crankcase 20 as shown in figure 14 and motor 10 adopt lower margin formula to connect, it is to be fixed on same collet with respective foundation bolt by crankcase 20 and motor 10, its advantage is more convenient and flexible when being safeguard with installation, it is not necessary to just can motor 10 and crankcase 20 be installed on collet 50 by lifting appliance. Its centering method is, crankcase 20 and motor 10 is prized respectively with crowbar, by checking that the external diameter of shaft coupling adjusts both centerings, plunger displacement pump for middle-size and small-size flow, because its volume and weight is all little, therefore this centering regulative mode is effective, but for the plunger displacement pump of big flow, its volume and weight is all relatively larger, uses the mode manually prized to be adjusted just very difficult. In centering process, also need to carry out adjustment repeatedly and inspection, centering degree and efficiency simultaneously, 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 fixedly installed on described collet. Respectively installed surface 41, the both sides of support 40, motor 10 and crankcase 20, be fixedly mounted on installed surface 41 respectively accordingly; 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 is being connected by shaft coupling after docking with the power shaft of crankcase 20, and then the power shaft of crankcase 20 can be rotated again through decelerator or gear train drive disk assembly band dynamic crankshaft 31. Specifically, two installed surfaces 41 offer the installation screwed hole of positional symmetry in advance, 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, preferred 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, it is preferable that be fixed on collet 50 by support 40.

Technique scheme is the core technology scheme of the present embodiment, it by being respectively arranged with a boss circle connected in advance on the end face of crankcase 20 and motor 10, this boss circle is entered respectively in the mounting-positioning holes at support 40 two ends, respectively motor 10 and crankcase 20 are fixed on support 40 with bolt on end face again, thus ensureing crankcase 20 and the centering of motor 10. Being positioned to add and have determined that alignment man-hour because of support 40 both sides, therefore motor 10 and crankcase 20 are without then through centering adjustment. It should be noted that those skilled in the art obviously can also is that both are first pre-fixed by the mode being respectively provided with detent on motor 10 and crankcase 20 in advance, then do not repeat one by one at this. As can be seen here, the emulsion plunger of the present embodiment has installs simple, reliable, crankcase 20 and the high advantage of motor 10 accuracy of alignment, and does not rely on technical merit and the experience of operator.

Embodiment 7

The present embodiment is the improvement in embodiment 1-6 on arbitrary basis, and it is distinctive in that compared to embodiment 1-6:

Current existing plunger displacement pump generally adopts and between bent axle 31 and connecting rod 34, adopts forced feed lubrication, namely in oil circuit, lubricating oil is injected so that it obtains lubrication, splash lubrication is then adopted between slide block 35 and chute, with reference to Figure 17, the lubrication of bent axle 31 is to deliver lubricating oil in the through hole in the middle of bent axle 31 by gear pump, the through hole that each bearing shell centre position is bored in the middle of one horizontal aperture of oil and bent axle 31 respectively communicates, again through horizontal aperture, deliver lubricating oil to the surface of bearing shell, make the axle journal acquisition lubrication of bearing shell and bent axle 31.In the work process of bent axle, lubricating oil, by driving lubricating oil adhered thereto to get rid of the upper oil sump to crankcase, again through the aperture in upper oil sump, is delivered to the surface of slide block 35, thus completing the lubrication of slide block by its turning effort. This splash lubrication mode have the disadvantage that when plunger displacement pump install status not at ordinary times, position of a relatively high in slide block 35 is difficult to obtain lubrication, and the other end of connecting rod 34 is also not readily available lubrication, thus being easily caused slide block 35 and chute sinters, and then crankcase 20 is damaged, and the foreign material in upper oil sump also readily penetrate through aperture and enter between slide block 35 and chute, cause chute abrasion etc.

In order to solve the defect existed in existing splash lubrication, slide block 35 and bent axle 31 are carried out forced feed lubrication by the lubricating system of the present embodiment respectively respectively, comprising: include lubricating system, described gear oil pump, and connect the circulating lubricating oil road of described gear oil pump, described gear 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.

Technique scheme is the core technology scheme of the present embodiment, by the setting on circulating lubricating oil road so that all moving components flowed through, in the process of its flowing, are carried out forced feed lubrication by the lubricating oil in circulating lubricating oil road. And in order to avoid the high oil temperature of lubricating oil, circulating lubricating oil road being also associated with external oil cooling but device, described external oil cooling but device is connected with described circulating lubricating oil road, 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 and the passage composition being positioned on described crankcase 20 respectively. It is to be respectively paralleled on described circulating lubricating oil road by connecting rod lubrication oil circuit 312 and slide block lubricant passage way 313, thus the lubrication completed between slide block and slide block 35 and the chute that connecting rod 34, the bent axle 31 of connecting rod 34 one end connection, connecting rod 34 other end are connected. Connecting rod lubrication oil circuit 312 is by the gap between bearing shell and the described bent axle 31 of described connecting rod 34, the gap between the slider pin 354 on the other end of described connecting rod 34 and described slide block 34 is extended to, thus the two ends of described connecting rod 34 are lubricated respectively through the inside of described connecting rod 34. Described slide block lubricant passage way 313 includes the lubrication channel offered on the described chute above by described slide block 35, and described circulating lubricating oil road is through described slide block lubricant passage way 313. Owing to lubricating oil power in oil circuit comes from gear oil pump, therefore no matter whether installation site is smooth, all without the lubricant effect affecting lubricating oil. And above-mentioned slide block lubricant passage way 313 and the passed gym suit of connecting rod lubrication oil circuit 312 are totally-enclosed setting, the process that dust and other impurities will not lubricate again enters into the surface of kinematic pair, it is possible to keep the cleaning of equipment, improve service life.

Additionally, described circulating lubricating oil road is additionally provided with oil circuit plinth, oil pressure sensor, oil strainer, fuel level 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, and A5 is distributed on a circumference on cross section, and A1, A2 are positioned at same one end of bent axle 31, A3, A4, and A5 is positioned at the other end of bent axle 31, B1, B2, B3, and B4 is positioned on each crank.B5 is drilled on the cylindrical installing bearing, that is to say between two supportings. The oilhole of maneton 1 and maneton 2 is by longitudinal hole A1 and A2, again through transverse holes B1, it is through; Maneton 2,3,4,5 is in like manner. The advantage of this setup is: lubricant passage way, in the inner position of bent axle 31, does not interfere with the size of bent axle 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 displacement 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, it includes implementing emulsion plunger arbitrary in 1-7, wherein, several plunger displacement pumps are successively set on collet 50, the both sides of described collet 50 are respectively arranged with the imbibition supervisor 51 connecting imbibition chamber and exhaust chamber and return liquid supervisor 52, and described imbibition supervisor 51 is additionally provided with booster pump; The imbibition passage of every described plunger displacement pump and apocenosis passage are connected to described imbibition supervisor 51 and return on liquid supervisor 52. The multiple stage plunger displacement pump of such emulsion power pack can adopt same pipette to connect a booster pump to realize feed flow; The multiple stage pump of emulsion pump adopts same unloading liquid back pipe to realize back liquid, improves the efficiency of supply of emulsion.

Claims (9)

1. an emulsion plunger, including:

Motor (10);

Crankcase (20), forms the bent axle groove for installing bent axle (31) and the chute that slide block (35) work being connected with plunger (33) reciprocatingly slides in described crankcase (20);

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

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

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

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

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

It is characterized in that:

Described slide block (35) includes slider body (352), and the dismountable slide block set (351) being arranged on described slider body (352) external diameter, and described slide block set (351) and described slider body (352) is made to keep fixing by securing member.

2. emulsion plunger according to claim 1, it is characterised in that:

The end of described slider body (352) forms screwed hole, and the corresponding described screwed hole of described plunger connector (333) forms threaded rod, and the outer circumference surface of described plunger connector (333) forms screw thread;

Described securing member is locking nut, and described slider body and slide block set (351) are fixed together by described locking nut by the screw thread on described plunger connector (333) outer circumference surface.

3. emulsion plunger according to claim 2, it is characterised in that:

Described slider body (352) includes the first end and for installing the second end of described slide block set (351), the diameter of described second end is less than described first end diameter, and forms the First terrace agreeing with described slide block set (351) thickness and the second step face lower than described First terrace on described second end;

Described slide block set (351) one end is resisted against on described First terrace, and the other end forms the pressure section being pressed on described second step face.

4. emulsion plunger according to claim 3, it is characterised in that:

The sections inner side that described slide block set (351) and described First terrace lean forms cannelure, is provided with sealing ring in described cannelure.

5. the emulsion plunger according to any one of claim 1-4, it is characterised in that:

Described slider body is made of cast iron.

6. the emulsion plunger according to any one of claim 1-5, it is characterised in that:

Described slide block set (351) is made of stainless steel.

7. the emulsion plunger according to any one of claim 1-6, it is characterised in that:

Described slide block (35) connects one end of described connecting rod (34) and forms the open slot (353) for holding described connecting rod (34) end, and described open slot (353) has two sidewalls being oppositely arranged;

Being equipped with slider pin (354) in through hole on described sidewall, described connecting rod (34) and described slider pin (354) are rotationally connected.

8. emulsion plunger according to claim 7, it is characterised in that:

The end of two described sidewalls is also respectively facing described slider pin (354) and is provided with screwed hole, and bolt (355) is arranged in screwed hole, thus described slider pin (354) is biased power.

9. emulsion plunger according to claim 8, it is characterised in that:

The corresponding described bolt (355) of described slider pin (354) is provided with recessed locating slot.