CN105626507A - Five-plunger pump - Google Patents

Abstract

The invention provides a five-plunger pump. The five-plunger pump comprises an electromotor, a crankcase, a crankshaft, a connecting rod and a plunger, wherein a crankshaft groove for mounting the crankshaft, and a sliding chute for a slider connected with the plunger to perform reciprocating sliding are molded inside the crankcase; the crankshaft is mounted inside the crankshaft groove in the crankcase; the crankshaft is driven to rotate by the output shaft of the electromotor; the connecting rod is mounted inside the sliding chute in the crankcase; one end of the connecting rod is rotationally connected with the crankshaft; the other end of the connecting rod is fixedly connected with the slider so that the slider is driven to perform reciprocating sliding inside the sliding chute under the driving of the crankshaft; the plunger is connected with the slider and performs reciprocating motion inside a high-pressure cylinder sleeve under the driving of the slider in order to realize liquid suction and liquid discharging; the crankcase is of a separated type structure and comprises a first part and a second part which are mounted together in a mutual fastening way; the first part and the second part are each provided with a part of the crankshaft groove so that the crankshaft can be taken out of the crankshaft groove after the first part or the second part is dismounted, and thus the crankshaft can satisfy the requirements on strength and rigidity and can be mounted inside the crankcase more easily.

Description

A kind of five-plunger pump

Technical field

The present invention relates to technical field of engineering machinery, it is specifically related to five-plunger pump.

Background technology

High-pressure high-flow emulsion pump is the hydraulicefficiency power unit for the fully-mechanized mining working support apparatus design of large-scale coal enterprise, being the key equipment realizing working face high-yield and high-efficiency, continuity, the Stability and dependability of its work have very important significance for ensureing the safety in production of coal enterprise and increase economic efficiency. Along with coal-mining technique develops to high-tech direction, emulsion power pack be it is also proposed new requirement, not only to be ensured flow and the pressure of pump, also require to ensure work-ing life and the reliability of pump simultaneously, namely improve the working hour of trouble free. The emulsion pump of current domestic peak flow reaches 550L/min, but relative to high-end large discharge imported product, it cannot meet the use properties requirement of the above coal mining amount of ten-million-ton scale, and the high-end emulsion pump of large discharge relies on import completely.

With reference to the side cut-away view of the one-piece crankshaft case shown in figure 5, the installation method of this kind of crankcase is: 1, install bearing on bent axle 31;

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

3, bearing is adjusted in the bearing hole in crankcase 20.

In this installation process, in order to make in hole that bent axle 31 more easily imports crankcase into, the hole machined by crankcase 20 both sides is needed to become size to be greater than the form of bearing external diameter, recycling is enclosed within the bearing housing 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, after the bearing of centre is first in place by needs, the bearing of both sides is being installed, owing to the weight of bent axle 31 is bigger, in general only assist to install by engineering machinery, therefore it increases greatly compared to the installation difficulty of above-mentioned double base bent axle 31, and support quantity reach 4 or more time, just can not again bent axle 31 be loaded in crankcase 20.

With reference to, in figure 6, the stressing conditions of the bent axle of two supportings, has three plungers 33 bent axle 31 to be produced reactive force simultaneously, the counter-force that supporting provides is greater than single plunger and acts on the power on bent axle 31, and reactive force is the half of overall length to the ultimate range of supporting-point. The stress in bending of bent axle 31 is maximum, and the susceptibility simultaneously plunger 33 amount of force changed also accordingly relatively greatly, when the operating pressure of emulsion pump exceeds pre-determined range, just easily causes bent axle 31 can not bear reactive force and rupture. In order to make bent axle 31 meet the demand of strength and stiffness, adopting two bent axles 31 supported to need the diameter increasing bent axle, therefore its processing and manufacturing cost is higher, installation difficulty is relatively big and later maintenance difficulty is also bigger.

With reference in figure 7, the stressing conditions of the bent axle of three supportings, reactive force is 0.3L (wherein L is the length of bent axle 31 axis) to the distance maximum value of supporting-point, there are at most two plungers bent axle to be produced reactive force between two supportings simultaneously, owing to distance reduces 40%, and reactive force additionally reduces 33%, two totals that the stress in bending making bent axle 31 is reduced by 2.5 times. Simultaneously susceptibility when plunger 33 amount of force changes also correspondingly reduces. Thus effectively improve the strength and stiffness of bent axle 31, it is possible to save steel to a certain extent. But this kind of bent axle is being applied in the above coal mining amount operating mode of ten-million-ton scale, still can not satisfy the demands.

Being that the Rigidity and strength being promoted bent axle must increase supporting quantity it thus is seen that there is technical problem in existing large-flow emulsion pump, and be just difficult to be encased in crankcase after supporting quantity increases, installation and later maintenance to equipment are all very unfavorable.

Summary of the invention

Therefore, the technical problem to be solved in the present invention is to overcome and there is the bent axle that crankcase can not meet multi-support in existing large-flow emulsion pump and load fast, and is unfavorable for the technological deficiency of equipment later maintenance.

For solving the problems of the technologies described above, the present invention provides a kind of five-plunger pump, comprising:

Electric motor;

Crankcase, forms the bent axle groove for installing bent axle in described crankcase, and the slide block being connected with plunger makes the chute of back and forth slip;

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

Bent axle, described bent axle drives 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 fixedly connected with described slide block, under the drive of described bent axle, to drive described slide block back and forth to slide in described chute;

Plunger, is connected with described slide block, to-and-fro movement in high pressure cylinder sleeve under the drive of described slide block, thus realizes imbibition and discharge opeing;

Described crankcase is split-type structural, it comprises button mutually and closes the first part and second section that are installed together, described first part and described second section has the described bent axle groove of part respectively, so that after the described first part of dismounting or second section, described bent axle can be taken out in described bent axle groove.

In above-mentioned five-plunger pump, being molded on described first part and described second section of described bent axle groove decile.

In above-mentioned five-plunger pump, on the longitudinal cross-section of described first part and described second section, both bonding surfaces are in the straight line of 45 �� of angles between horizontal plane.

In above-mentioned five-plunger pump, described bent axle being provided with six supportings, described bent axle is divided into five sections by described supporting in its longitudinal direction.

In above-mentioned five-plunger pump, equidistant placement between adjacent described supporting.

In above-mentioned five-plunger pump, described plunger is five, and plunger described in each is connected between the described supporting of adjacent two by means of the slide block on connecting rod and connecting rod respectively.

In above-mentioned five-plunger pump, described bent axle is through forging molding.

Accompanying drawing explanation

In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art 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 prerequisite 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 that in existing crankcase, the power that is subject to of slide block analyzes schematic diagram;

Fig. 3 is the contrast schematic diagram that in the invention process, crankcase slide block is analyzed by power by power analysis and existing crankcase slide block;

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 adopts the bent axle of double base by power analysis chart in prior art;

Fig. 7 adopts the bent axle of three supportings by power analysis chart in prior art;

Fig. 8 be in the embodiment of the present invention six supportings by power analysis chart;

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 wall screw;

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 oiling system in prior art;

Figure 18 is the structural representation of oiling 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-electric motor; 20-crankcase; 31-bent axle; 33-plunger; 34-connecting rod; 35-slide block; 36-high pressure cylinder sleeve; 21-first part; 22-second section; 311-supports; 331-plunger body; 332-protects head; 333-plunger connector; 351-slide block set; 352-slide block body; 353-open slot; 354-slider pin; 355-tack bolt; 23-liquid sucting valve; 24-tapping valve; Cover plate before 25-pump head; 26-pump head; 40-support; 50-collet; 41-mounting face; 312-connecting rod lubrication oil circuit; 313-slide block oil gallery; 51-imbibition is responsible for; 52-returns liquid supervisor.

Embodiment

Below in conjunction with accompanying drawing, the technical scheme of the present invention is clearly and completely described, it is clear that described embodiment is the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.

In describing the invention, it should be noted that, it is based on orientation shown in the drawings or position relation that the orientation of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " or position are closed; be only the present invention for convenience of description and simplified characterization; instead of the device that refers to of instruction or hint or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention. In addition, term " first ", " the 2nd ", " the 3rd " are only for describing object, and can not be interpreted as instruction 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, such as, it is possible to be fixedly connected with, 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 directly be connected, it is also possible to be indirectly connected by intermediary, it is possible to be the connection of two element internals. For the ordinary skill in the art, it is possible to particular case understands above-mentioned term concrete implication in the present invention.

In addition, if below in the described different enforcement mode of the present invention involved technology feature do not form conflict each other and just can be combined with each other.

Embodiment 1

The present embodiment provides a kind of five-plunger pump, with reference to figure 1, the five-plunger pump of the present embodiment comprises electric 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 electric 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 fixedly connected with the front end of slide block 35, and rear end and the connecting rod 34 of slide block 35 are rotationally connected, and the other end of connecting rod 34 is then rotationally connected with bent axle 31. Like this when electric motor 10 driving crank 31 rotates, 34, connecting rod can band movable slider 35 and plunger 33 move back and forth in chute, thus provides power for imbibition and the discharge opeing of ram pump.

In the present embodiment, namely the rotation center in the vertical direction of bent axle 31, lower than the position of center line of chute, is also that bent axle 31 drives the slide block 35 in chute to move back and forth on relatively low position. And preferably in the rotary course of bent axle 31, the variation range of connecting rod 34 and horizontal direction angle changes between 5-10 ��. For the five-plunger pump of applicant's design, ensure that the variation range of connecting rod 34 and horizontal direction angle is between 5-10 ��, then the rotation center in the vertical direction of preferred bent axle 31 is lower than the medullary ray 5-15mm of chute, the rotation center in the vertical direction of such as bent axle 31 can lower than chute medullary ray 5mm, 10mm or 15mm, at this then most preferably 10mm. Although in above-mentioned preferred implementation; the variation range of connecting rod 34 and horizontal direction angle is between 5-10 ��; it is not limited to this; obviously on the emulsion ram pump of different displacements; to there is different designs in the length of connecting rod; in the case, 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 invention design that this enforcement to be protected.

The benefit of design is like this: the principle schematic with reference to ram pump in the set-up mode that bent axle 31 rotation center existing shown in figure 2 and chute medullary ray are contour:

In imbibition process: plunger 33 is not owing to being subject to the effect of emulsion liquid pressure, and therefore plunger 33 and slide block 35 can not be subject to pressure effect substantially;

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

With reference to the principle schematic of bent axle 31 rotation center in the present embodiment shown in figure 3 lower than ram pump in the set-up mode of chute medullary ray;

In discharge opeing process: after the rotation center of bent axle 31 moves down, the angle that connecting rod 34 gives between the power F of slide block 35 and horizontal plane also reduces thereupon, thus compared to existing design, effectively reduce the frictional force between slide block 35 and chute, avoid rapid wear in slide block use procedure. And cut, when moving under the rotation center due to 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, it is to increase bent axle 31 promotes the efficiency of slide block 35.

In sum, the five-plunger pump of the present embodiment can reduce the frictional force that slide block 35 is subject in discharge opeing process, thus avoids slide block 35 to be worn, it is to increase the work-ing 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 compared to the difference of embodiment 1:

With reference to figure 4, in the present embodiment, crankcase 20 is split-type structural, it comprises button mutually and closes the first part 21 and second section 22 that are installed together, preferred first part 21 and second section 22 have general bent axle groove respectively, first part 21 and second section 22 are detained mutually and after closing installation, forms complete bent axle groove, the benefit arranged like this is, after first part 21 is separated with second section 22, can be taken out from bent axle groove by bent axle 31.

As one preferred embodiment, on the longitudinal cross-section of first part 21 and second section 22, both bonding surfaces are in the straight line of 45 �� of angles between horizontal plane. First part 21 and second section 22 can be connected by fastening pieces such as joint bolts, thus keep relatively fixing.

With reference to the side cut-away view of the one-piece crankshaft case shown in figure 5, the installation method of this kind of crankcase is: 1, install bearing on bent axle 31;

4, the bent axle installing bearing is worn into casing from the hole of crankcase 20 side;

5, bearing is adjusted in the bearing hole in crankcase 20.

In this installation process, in order to make in hole that bent axle 31 more easily imports crankcase into, the hole machined by crankcase 20 both sides is needed to become size to be greater than the form of bearing external diameter, recycling is enclosed within the bearing housing 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, after the bearing of centre is first in place by needs, the bearing of both sides is being installed, owing to the weight of bent axle 31 is bigger, in general only assist to install by engineering machinery, therefore it increases greatly compared to the installation difficulty of above-mentioned double base bent axle 31, and support quantity reach 4 or more time, just substantially can not again bent axle 31 be loaded in crankcase 20.

In existing emulsion ram pump, plunger 33 is generally two or three, and the supporting on bent axle 31 is two or three. With reference to the principle schematic of the double base bent axle shown in figure 6 and Fig. 7 and three supporting crankshafts. Because of stress in bending and flexural deformation, and reactive force is proportional to the distance of supporting-point, and reactive force is more big to the distance of supporting-point, then flexural deformation and stress in bending are more big. Therefore shorten reactive force to the distance of supporting-point, just can effectively reduce the Bending Influence power of bent axle 31 flexural deformation, reach the object of the strength and stiffness improving bent axle 31.

With reference to, in figure 6, the stressing conditions of the bent axle of two supportings, has three plungers 33 bent axle 31 to be produced reactive force simultaneously, the counter-force that supporting provides is greater than single plunger and acts on the power on bent axle 31, and reactive force is the half of overall length to the ultimate range of supporting-point. The stress in bending of bent axle 31 is maximum, and the susceptibility simultaneously plunger 33 amount of force changed also accordingly relatively greatly, when the operating pressure of emulsion pump exceeds pre-determined range, just easily causes bent axle 31 can not bear reactive force and rupture. In order to make bent axle 31 meet the demand of strength and stiffness, adopting two bent axles 31 supported to need the diameter increasing bent axle, therefore its processing and manufacturing cost is higher, installation difficulty is relatively big and later maintenance difficulty is also bigger.

With reference in figure 7, the stressing conditions of the bent axle of three supportings, reactive force is 0.3L (wherein L is the length of bent axle 31 axis) to the distance maximum value of supporting-point, there are at most two plungers bent axle to be produced reactive force between two supportings simultaneously, owing to distance reduces 40%, and reactive force additionally reduces 33%, two totals that the stress in bending making bent axle 31 is reduced by 2.5 times. Simultaneously susceptibility when plunger 33 amount of force changes also correspondingly reduces. Thus effectively improve the strength and stiffness of bent axle 31, it is possible to save steel to a certain extent. But this kind of bent axle is being applied in the above coal mining amount operating mode of ten-million-ton scale, still can not satisfy the demands.

With reference in figure 8, the stressing conditions of the bent axle 31 with six supportings related in the present embodiment, the reactive force of any one plunger 33 is 0.1L to the distance of supporting-point, and distribution of forces is even, has and only have the reactive force of a plunger 33 between any two supportings. Owing to reactive force is reduced into 0.1L to the distance of supporting-point, and reactive force only has the reactive force of a plunger, the stress in bending making bent axle is reduced to the 1/15 of only double base bent axle by this, the 1/6 of three supporting crankshafts, it is thus possible to greatly cut down the impact of stress in bending for bent axle 31, effectively improve the strength and stiffness of bent axle 31.

From the contrast of above-mentioned double base and three supporting two kinds of bent axle 31 set-up modes, 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 supporting loads. Then there is not this problem in the split type crankcase 20 of the present embodiment, after its installation process only needing first part 21 disassembled from second section 22, again the bent axle 31 installing bearing is directly directed at bent axle groove to put into, finally first part 21 is reinstalled in first part 21. It thus is seen that the crankcase of the present embodiment can adapt to the bent axle 31 of multi-support 311, it is possible to effectively solve the technological deficiency of bent axle 31 strength and stiffness deficiency in existing ram pump.

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 with it, 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 of the slide block 35 on connecting rod 34 and connecting rod 34 respectively.

In addition, in order to promote the Rigidity and strength of bent axle 31 further, bent axle 31 preferably adopts forging molding, the feature of forging processing is the continuity that can ensure metal fibrous tissue, dimension fibrous tissue and the forging profile of forging are consistent, metal streamline is complete, can ensure that part has good mechanical property and long work-ing life. In order to better improve the performance of product, what change bent axle 31 changes work method, adopt forging process, 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 pattern of material, thus can significantly reduce the pressure acted on bent axle each point, it is ensured that the intensity of material, thus improve the performance of product, there is intensity height, dependable performance, life-span length, manufacturing time and the manufacturing cost advantage such as reduction greatly. Solving tradition and adopt the direct machine-shaping of round steel bar, bar adds trade union and destroys original metallic fibrous layer, causes decrease in intensity, thus reduces use properties and the life-span of bent axle 31.

It should be noted that, although 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 and do not mean that its bent axle 31 that only can install multi-support 311; Do not mean that in the ram pump of the present embodiment, only can use the bent axle 31 of multi-support 311 yet. The concrete set-up mode of crankcase 20 and bent axle 31 is selected by the capable user demand according to reality of those skilled in the art.

Embodiment 3

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

With reference to the structural representation of the plunger 33 shown in figure 9, the protection 332 that plunger 33 comprises plunger body 311 and is arranged in plunger body 331. When ram pump is after life-time service, the end of plunger 33 easily produces abrasion, thus destroys its stopping property, causes inefficiency in imbibition and discharge opeing process, even easily causes structure deteriorate 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; and after not needing to remove crankcase 20 completely; by plunger 33 integral replacing, not only increase maintenance efficiency like this, also reduce maintenance difficulty and maintenance cost.

In addition, the problem that plunger body 331 exists is, existing plunger body 331 is made up of metallic substance usually, such as steel etc.,, after Overheating Treatment, its hardness also only can reach about 55HRC, and plunger body 331 be one frequently by the parts of power, therefore, in long-term use procedure, just easily there is the problem such as crowfoot cracks, breakage in plunger body 331. For this reason, the plunger body 331 in the present embodiment preferably adopts stupalith to make, and particularly hardness is greater than the stupalith of 70HRC.

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

In conjunction with the embodiments 1 and embodiment 2, the moving 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, thus make plunger 33 relative to high pressure cylinder sleeve 36 relative movement on being fixedly connected in ram pump pump head, so that forming negative pressure in the cavity of another 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 discharge opeing chamber through tapping valve, thus complete the process of imbibition and discharge opeing under the effect of plunger 33.

Embodiment 4

The present embodiment is the improvement on embodiment 1,2 or 3 basis, 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 generally adopts the cast aluminum construction of monoblock type, it is position at the two ends nylon plug of through hole for being rotationally connected the slider pin of connecting rod 34, its structure of the slide block of this kind of structure is simple, light weight, inertia pin and cost lower, but there is following shortcoming in it: owing to the hardness of cast aluminium is lower, oil sealing strong with power coordinates the surface of part easily to be drawn wound by oil sealing, thus produce oil leakage phenomenon, affect the normal operation of pump, it is necessary to changed by the slide block damaged. Again because the operation changed by slide block in the crankcase 20 of monoblock type is very loaded down with trivial details, just can change after needing all to remove the bent axle 31 in crankcase 20, connecting rod 34 and slide block 35 and the connection between slide block 35 and plunger 33, therefore its change difficulty and maintenance cost very high. On the other hand, the quality of fit of slider pin requires very high, because the intensity of aluminium and hardness are all lower, so what the necessary shrink-fit of slider pin wherein just can be reliable and stable is fixing, otherwise distortion easily occur for installing the hole of slider pin on slide block, therefore its assembly difficulty is also higher.

The sealing face existed to solve in existing slide block 35 is easily drawn and is hindered leakage of oil, the tolerance 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 comprises slide block body 352, and dismountable slide block set 351 being arranged on slide block body 352 external diameter, and described slide block set 351 and described slide block body 352 is made to keep fixing by fastening piece. And preferably slide block body 352 is supported by meehanite cast iron, because the thermal expansivity of meehanite cast iron is less than the thermal expansivity of cast aluminium, therefore deformation is less likely to occur the slide block body 352 supported by meehanite cast iron, the stability of its size is better, ultimate compression strength, hardness and wear resistance are also better than cast aluminium, contribute to extending the work-ing life of slide block 35. Described slide block set 351 preferably adopts stainless steel to make, stainless steel after heat treatment its surface hardness can reach about HRC55, compared to cast aluminium, greatly improve hardness, in use surface is not easy to be scratched, it may also be useful to the life-span is longer. Even if when 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 does not need the first part 21 dismantled in crankcase 20, but can directly be changed by slide block set 351 from the position of the separate cavities of crankcase 20, and therefore its later maintenance is also very convenient.

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

Further, in order to make slide block body 352 and slide block set 351 stablize and coordinate accurately, described slide block body 352 comprises first end (illustrated left end) and the 2nd end for installing described slide block set 351, the diameter of described 2nd end is less than described first end diameter, and forms the first step surface agreeing with described slide block set 351 thickness and the 2nd step surface lower than described first step surface (one layer higher in two step surfaces) on described 2nd end;

Slide block set 351 one end is resisted against on described first step surface, and the other end forms the pressure section being pressed on described 2nd step surface. The benefit arranged like this is: relative securement between slide block set 351 and slide block body 352, and is not easy gap occur.

Further, in order to ensure the stopping property in gap between slide block set 351 and slide block body 352, inside the part that slide block set 351 and described first step surface lean, form ring groove, in described ring groove, it is provided with sealing-ring.

In the present embodiment, one end that slide block 35 connects connecting rod 34 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 arranged in open slot 353, also respectively described slider pin 354 being provided with threaded hole in the end of two described sidewalls, tack bolt 355 is arranged in threaded hole, thus described slider pin 354 is applied biassing force. The corresponding described tack bolt 355 of slider pin 354 is provided with recessed locating slot. Tack bolt 355 is not single locates to slider pin 354, the gap produced because tolerance of dimension is different can also be eliminated with the through hole on sidewall, thus slider pin is pushed to its main force part, and it is pressed on the sidewall of slide block 35 through hole firmly, thus prevent slider pin 354 from producing to loosen, it is to increase the precision of assembling and reliability. Owing to there is small gap between the through hole on slider pin 354 and sidewall, therefore compared to the assembling mode of existing shrink-fit, its assembly difficulty is also lower, is convenient to install and later maintenance.

Embodiment 5

The present embodiment is the improvement on arbitrary basis in embodiment 1-4, and 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 miter valve structure, adopt the mode of upper and lower layout, and the advantage of this kind of decoration form is concentricity height, good airproof performance, compact construction etc. But also there is following shortcoming in it: the first, first the liquid sucting valve of lower section is as inconvenient in removed when occurring that damage needs to change, need first to be disassembled by heavy pump head, after the multiple parts outside pump head are removed one by one, being changed by the parts such as the liquid sucting valve of inside, maintenance difficulties is quite big again. Two, the guiding face of spool is inserted in the hole of valve seat, occupies the area of flow section, thus limits its use range. If hole is oversize, then spool becomes heavy, and handiness 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 ram pump of the present embodiment, the imbibition passage that the inner chamber of high pressure cylinder sleeve 36 is connected in pump head 26 respectively and apocenosis passage, described imbibition passage is connected imbibition chamber and discharge opeing chamber respectively with apocenosis passage; 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 cover plate 25 before the outside of described liquid sucting valve 23 is also provided with pump head, forms the passage for being connected described imbibition chamber in cover plate 25 before described pump head. Its decoration form is: tapping valve 24 is arranged in top, and liquid sucting valve 23 is arranged in side, like this after needing only to need the front cover plate 25 before by pump head to remove when changing liquid sucting valve 23, can change.

Owing to liquid sucting valve 23 and tapping valve 24 are flap type, its compared to miter valve not only volume and weight have reduction, and be applicable to being arranged on the side of pump head, so that can be changed by liquid sucting valve 23 by removing the mode of pump head end cover above. In addition, flap type can not take flow section and amass, and is therefore conducive to improving 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 on arbitrary basis in embodiment 1-5, and it is compared to the difference of embodiment 1-5:

In actual use, crankcase 20 and electric motor 10 are when mounted, the input shaft of the output shaft of electric motor 10 and crankcase 20 must be adjusted to the position of mutual centering, otherwise vibration & noise be will in use produce, working efficiency and the work-ing life of crankcase 20 and electric motor 10 affected. A kind of comparatively common set-up mode is: the structural representation that crankcase 20 as shown in figure 14 and electric motor 10 adopt lower margin formula to connect, it is fixed on same collet with respective wall screw by crankcase 20 and electric motor 10, relatively for convenience of with flexibly when its advantage is safeguarded and installs, it is not necessary to just electric motor 10 and crankcase 20 can be installed on collet 50 by lifting rig. Its centering method is, dynamic crankshaft case 20 and electric motor 10 is prized respectively with crowbar, both centerings are adjusted by checking the external diameter of shaft coupling, for the ram pump of middle-size and small-size flow, because its volume and weight is all little, therefore this kind of centering regulative mode is effective, but the ram pump for large discharge, its volume and weight is all bigger, it may also be useful to it is just very difficult that the mode that artificial sled moves carries out adjustment. Also need to carry out adjustment repeatedly and inspection, centering degree and efficiency in centering process simultaneously, depend on the working experience of operator.

With reference to Figure 15 and Figure 16, the ram pump of this enforcement also comprises support 40 and collet 50, and wherein support 40 is vertically fixedly installed on described collet. The both sides of support 40 are respectively mounting face 41, electric motor 10 and crankcase 20, are fixedly mounted on accordingly respectively on mounting face 41; Output shaft and the bent axle 31 of the corresponding described electric motor 10 of support 40 are provided with respective open holes, so that electric motor 40 docks mutually with described crankcase 20. As one preferred embodiment, the output shaft of electric motor 10 is being connected by shaft coupling after docking with the input shaft of crankcase 20, and then the input shaft making crankcase 20 can drive bent axle 31 to rotate by speed reduction unit or gear unit transmission parts again. Specifically, two mounting faces 41 being offered the installation threaded hole of positional symmetry in advance, the output shaft of electric motor 10 and the input shaft of described crankcase 20, achieved a butt joint by shaft coupling. Support 40 there is rectangular four corner, corner location is fixedly connected with described collet 50 by joint bolt. In the present embodiment, preferred support 40 is hollow frame body, because the contact area of the support 40 of this kind of 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 electric motor 10, this boss circle is inserted respectively in the installation pilot hole at support 40 two ends, respectively electric motor 10 and crankcase 20 are fixed on support 40 with bolt on end face again, thus ensure crankcase 20 and the centering of electric motor 10. Because being positioned at of support 40 both sides adds man-hour it has been determined that alignment, therefore electric motor 10 and crankcase 20 are without the need to adjusting through centering again. It should be noted that, those skilled in the art obviously can also be that both are first pre-fixed by the mode arranging location groove on electric motor 10 and crankcase 20 in advance respectively, does not then repeat one by one at this. It thus is seen that the five-plunger pump of the present embodiment has installs simple, reliable, crankcase 20 and the high advantage of electric motor 10 centering precision, and do not rely on state of the art and the experience of operator.

Embodiment 7

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

Current existing ram pump adopts between bent axle 31 and connecting rod 34 usually and adopts mechanical lubrication, namely in oil circuit, inject lubricating oil thus make it obtain lubrication, spray lubrication is then adopted between slide block 35 and chute, with reference to Figure 17, the lubrication of bent axle 31 is transported in the through hole in the middle of bent axle 31 by toothed gear pump by lubricating oil, each bearing shell mid-way is bored the through hole in the middle of an oil horizontal aperture and bent axle 31 respectively and is communicated, again by horizontal aperture, the surface that lubricating oil is transported to bearing shell, makes the axle journal of bearing shell and bent axle 31 obtain lubrication. In the working process of bent axle, drive lubricating oil adhered thereto is got rid of the pond that oils to crankcase by its rotation effect, then the aperture by oiling in pond, lubricating oil is delivered to the surface of slide block 35, thus completes the lubrication of slide block. This kind of spray lubrication mode has following defect: when ram pump install status not at ordinary times, position relatively high in slide block 35 is difficult to obtain lubrication, and the other end of connecting rod 34 is also not easy to obtain lubrication, thus easily cause slide block 35 and chute to sinter, and then crankcase 20 is damaged, and the foreign material in pond that oil also easily enter between slide block 35 and chute through aperture, cause chute abrasion etc.

The defect existed to solve in existing spray lubrication, slide block 35 and bent axle 31 are carried out mechanical lubrication by the oiling system of the present embodiment respectively respectively, comprising: comprise oiling system, described geared oil pump, and connect the lubrication by oil circulation oil circuit of described geared oil pump, described geared oil pump trend lubricating oil through described lubricationpump, so that the moving parts in described ram pump is carried out mechanical lubrication.

Technique scheme is the core technology scheme of the present embodiment, by the setting of lubrication by oil circulation oil circuit so that all moving partss flowed through, in its process flowed, are carried out mechanical lubrication by the lubricating oil in lubrication by oil circulation oil circuit. And in order to avoid the high oil temperature of lubricating oil, lubrication by oil circulation oil circuit is also connected with external oil cooling but device, described external oil cooling but device be connected with described lubrication by oil circulation oil circuit, thus the lubricating oil through described external oil cooling but device is cooled.

Specifically, with reference to Figure 18, described circulating oil route connects the oil inlet pipe of described geared oil pump, oil outlet pipe respectively and the passage that is positioned on described crankcase 20 is formed. It is respectively paralleled on described lubrication by oil circulation oil circuit by connecting rod lubrication oil circuit 312 and slide block oil gallery 313, thus completes the bent axle 31 to connecting rod 34, the connection of connecting rod 34 one end, the slide block of connecting rod 34 the other end connection and the lubrication between slide block 35 and chute. Connecting rod lubrication oil circuit 312 is by the gap between the bearing shell of described connecting rod 34 and described bent axle 31, extend to the gap between the slider pin 354 on the other end of described connecting rod 34 and described slide block 34 through the inside of described connecting rod 34, thus the two ends of described connecting rod 34 are lubricated respectively. Described slide block oil gallery 313 comprises on the described chute above by described slide block 35 lubrication channel offered, and described lubrication by oil circulation oil circuit is through described slide block oil gallery 313. Owing to the power of lubricating oil in oil circuit comes from geared oil pump, no matter therefore position it is installed whether smooth, all can not affect the lubricant effect of lubricating oil. And the Sportswear of above-mentioned slide block oil gallery 313 and connecting rod lubrication oil circuit 312 processes is totally-enclosed setting, the process that dust and other impurities can not be lubricated again enters into the surface of kinematic pair, it is possible to keep equipment cleaning, improve work-ing life.

In addition, described lubrication by oil circulation oil circuit is also provided with oil circuit plinth, oil pressure sensor, oil strainer, fuel level sensor, oil temperature sensor, oil pump safety valve and oil-pressure gauge.

Below with reference to Figure 19, the oil gallery 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 be distributed on cross section all one circumferentially, A1, A2 are positioned at same one end of bent axle 31, and A3, A4, A5 are positioned at the other end of bent axle 31, and B1, B2, B3, B4 are positioned on each crank. B5 is drilled on bearings mounted cylindrical, is also namely between two supportings. The oil passage of crank shaft journal 1 and crank shaft journal 2 is by longitudinal hole A1 and A2, then by transverse holes B1, it is through; Crank shaft journal 2,3,4,5 is with reason. The advantage of this setup is: oil gallery, in the inner position of bent axle 31, can not have influence on the size of bent axle, and the physical dimension of bearing so that bent axle 31 does not need the setting in order to oil gallery and increased in size, contributes to reducing ram pump weight. But and the hole knockout not meaning that the oil gallery on bent axle is only limitted to above one.

Embodiment 8

With reference to Figure 20, the present embodiment provides a kind of emulsion power pack, it comprises implements five-plunger pump arbitrary in 1-7, wherein, some ram 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 discharge opeing chamber and return liquid supervisor 52, and described imbibition supervisor 51 is also provided with topping-up pump; The imbibition passage of ram pump described in every platform and apocenosis passage are connected to described imbibition supervisor 51 and return on liquid supervisor 52. The multiple stage ram pump of such emulsion power pack can adopt same pipette to connect a topping-up pump to realize feed flow; The multiple stage pump of emulsion pump adopts same unloading liquid returning tube to realize back liquid, it is to increase the efficiency of supply of emulsion.

Claims (7)

1. a five-plunger pump, comprising:

Electric motor (10);

Crankcase (20), forms the bent axle groove for installing bent axle (31) in described crankcase (20), and the slide block (35) being connected with plunger (33) makes the chute of back and forth slip;

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

Bent axle (31), described bent axle (31) drives by described electric 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 fixedly connected with described slide block (35), under the drive of described bent axle (31), to drive described slide block (35) back and forth to slide in described chute;

Plunger (33), is connected with described slide block (35), to-and-fro movement in high pressure cylinder sleeve (36) under the drive of described slide block (35), thus realizes imbibition and discharge opeing;

It is characterized in that:

Described crankcase (20) is split-type structural, it comprises button mutually and closes the first part (21) and second section (22) that are installed together, described first part (21) and described second section (22) has the described bent axle groove of part respectively, so that after the described first part of dismounting (21) or second section (22), described bent axle (31) can be taken out in described bent axle groove.

2. five-plunger pump according to claim 1, it is characterised in that:

Being molded on described first part (21) and described second section (22) of described bent axle groove decile.

3. five-plunger pump according to claim 2, it is characterised in that:

On the longitudinal cross-section of described first part (21) and described second section (22), both bonding surfaces are in the straight line of 45 �� of angles between horizontal plane.

4. five-plunger pump according to any one of claim 1-3, it is characterised in that:

Being provided with six supportings (311) on described bent axle (31), described bent axle (31) is divided into five sections by described supporting (311) in its longitudinal direction.

5. five-plunger pump according to claim 4, it is characterised in that:

Equidistant placement between adjacent described supporting (311).

6. five-plunger pump according to claim 5, it is characterised in that:

Described plunger (33) is five, and plunger described in each (33) is connected between the described supporting of adjacent two (311) by means of the slide block (35) on connecting rod (34) and connecting rod (34) respectively.

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

Described bent axle (31) is through forging molding.