CN203685505U - Opposed-piston pump - Google Patents
Opposed-piston pump Download PDFInfo
- Publication number
- CN203685505U CN203685505U CN201420017189.0U CN201420017189U CN203685505U CN 203685505 U CN203685505 U CN 203685505U CN 201420017189 U CN201420017189 U CN 201420017189U CN 203685505 U CN203685505 U CN 203685505U
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- cylinder body
- connecting rod
- bent axle
- hinged
- opposed
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Abstract
The utility model relates to a piston pump, in particular to an opposed-piston pump applied to engineering machines. The opposed-piston pump comprises supporting seats, a crankshaft, a first connecting rod set, a second connecting rod set, a first cylinder and a second cylinder. The two ends of the crankshaft are supported by the supporting seats, the first cylinder and the second cylinder are oppositely arranged on the two sides of the crankshaft and are respectively provided with a cylinder shell, an oil in/out hole, an inner piston and an outer piston, the inner pistons and the outer pistons move in the cylinder shells in a reciprocating mode, the first cylinder corresponds to the first connecting rod set, the second cylinder corresponds to the second connecting rod set, each connecting rod set comprises an inner connecting rod and an outer connecting rod, one end of each inner connecting rod is hinged to the corresponding inner piston, the other end of each inner connecting rod is hinged to the neck of the crankshaft, one end of each outer connecting rod is hinged to the corresponding outer piston, the other end of each outer connecting rod is hinged to the neck of the crankshaft, and the crankshaft neck connected with the inner connecting rods and the crankshaft neck connected with the outer connecting rods deviate from the rotating center of the crankshaft towards the opposite directions. The opposed-piston pump is large in delivery, high in efficiency, large in pressure and simple and compact in structure.
Description
Technical field
The utility model relates to reciprocating pump, is particularly applied to the oppesed piston pump of engineering machinery.
Background technique
Because engineering machinery operating conditions is severe, the feature such as load is heavy, slewing range is large, multisystem action, the axial piston pump of the advantage such as therefore have that pressure is high, rotating speed is high, volume is little and Variable Control is convenient is widely applied in engineering machinery.But still there is following problem in axial piston pump: axial piston pump is controlled pump delivery by adjusting swashplate angle, and inclination angle is larger, and discharge capacity is just larger, but also can produce larger radial component simultaneously, directly affects plunger cylinder intensity, rigidity; The spring restriction plunger drawback movement of plunger base, reduces thus plunger effective length and plunger space is not fully used; The ball pivot at plunger ball place lubricates by plunger hollow structure and is realized by the bulb position of one of mill off, has damping hole on piston shoes in addition, and this two places structure has weakened the sealability between plunger and swash plate, thereby limits the raising of whole pumping pressure; Turnover oil is by thrust plate control, and the opening and closing of pump and turnover oil produce instantaneous acceleration to thrust plate while switching, affect thrust plate stressed, thereby affect its working life.
Application number is that 200820021336.6 Chinese patent discloses a kind of horizontal opposition type high pressure plunger pump, on this pump drive shaft, adopt eccentric wheel structure, eccentric wheel connects with connecting rod, pump is by opposed plunger to-and-fro motion liquid in-out force feed, within an operation cycle, a pair of opposed plunger is realized twice fuel-displaced and oil-feed, each oil pump capacity is determined by the stroke size of a plunger, thereby discharge capacity is little.
Application number is that the Chinese patent of 201110305030.X discloses the two cylinder vacuum pumps of a kind of flat opposed, this pump is promoted piston rod and is realized the to-and-fro motion of piston by cam, within an operation cycle, a pair of opposed plunger is also to realize twice fuel-displaced and oil-feed, and cam and piston rod are how much sealings, and the pressure that can bear is not high.
Summary of the invention
The purpose of this utility model is to overcome the technical deficiency that above-mentioned plunger pump exists, and a kind of oppesed piston pump is provided, and this pump displacement is large, efficiency is high, pressure is large, simple and compact for structure.
The purpose of this utility model realizes by following technical proposals.
Oppesed piston pump described in the utility model, comprises supporting base (1), bent axle (2), first connecting rod group (3), second connecting rod group (4), the first cylinder body (5) and the second cylinder body (6).Described bent axle (2) two ends are supported by supporting base (1); Described the first cylinder body (5) and the second cylinder body (6) are opposite to bent axle (2) both sides, form one group of opposed cylinder body group; Described the first cylinder body (5) is provided with cylinder body shell (51), oil inlet hole (54), oil outlet (55) and reciprocating inner carrier (53) and outer piston (52) in cylinder body shell (51); Described the second cylinder body (6) is provided with cylinder body shell (61), oil inlet hole (64), oil outlet (65) and reciprocating inner carrier (63) and outer piston (62) in cylinder body shell (61); The corresponding first connecting rod group of the first cylinder body (5) (3), the corresponding second connecting rod group of the second cylinder body (6) (4); Described first connecting rod group (3) comprises inside connecting rod (32) and outside connecting rod (31), inside connecting rod (32) one end and inner carrier (53) are hinged, the other end and bent axle (2) axle journal is hinged, and outside connecting rod (31) one end and outer piston (52) are hinged, and the other end and bent axle (2) axle journal is hinged; Described second connecting rod group (4) comprises inside connecting rod (42) and outside connecting rod (41), inside connecting rod (42) one end and inner carrier (63) are hinged, the other end and bent axle (2) axle journal is hinged, and outside connecting rod (41) one end and outer piston (62) are hinged, and the other end and bent axle (2) axle journal is hinged; Bent axle (2) axle journal that described and inside connecting rod (32), (42) are hinged and depart from round about bent axle (2) rotating center with hinged bent axle (2) axle journal of outside connecting rod (31), (41).Such structure makes one of the opposed cylinder body of this group in the time of oil-feed state, and another is in going out oil condition.
In above-mentioned oppesed piston pump scheme, described opposed cylinder body group is two groups, on perpendicular to bent axle (2) plane, circumferentially distributes along bent axle (2), and adjacent cylinders interval 90 is spent, two groups of corresponding same suite axle (2) axle journals of opposed cylinder body.This structure is conducive to increase piston pump delivery, and reduces flow oscillation.
In above-mentioned oppesed piston pump scheme, described opposed cylinder body group is two groups, lay respectively at bent axle (2) axial direction, form the opposed cylinder body of upper and lower two-stage, in the opposed cylinder body of the superior and the subordinate, the cylinder body of identical turnover oil condition is positioned at bent axle (2) homonymy, the corresponding two-stage connection rod set of the opposed cylinder body group of two-stage and two-stage crankshaft journal.
In above-mentioned oppesed piston pump scheme, described opposed cylinder body group is more than or equal to three groups, on perpendicular to bent axle (2) plane, is circumferentially uniformly distributed along bent axle (2), the corresponding same suite shaft neck of all opposed cylinder body groups.This structure is conducive to increase piston pump delivery, and reduces flow oscillation.
In above-mentioned oppesed piston pump scheme, described opposed cylinder body group is more than or equal to three groups, be distributed in bent axle (2) axial direction, form multistage opposed cylinder body group, in every grade of opposed cylinder body group, the cylinder body of identical turnover oil condition is positioned at bent axle (2) homonymy, the corresponding one-level connection rod set of every one-level opposed cylinder body group and one-level crankshaft journal.Further, every grade of opposed cylinder body group has the opposed cylinder body group of at least two groups, and in opposed cylinder body group at the same level, the opposed cylinder body group of many groups is circumferentially uniformly distributed along bent axle (2).
In above-mentioned oppesed piston pump scheme, described oil inlet hole and oil outlet can be arranged on cylinder body shell, also can be arranged on inner carrier or outer piston.
Oppesed piston pump of the present utility model can be applicable to engineering machinery field, especially requires in discharge capacity is large, pressure is high engineering machinery.Its feature is to adopt opposed cylinder body group, and in a cylinder body oil-feed, another cylinder body is fuel-displaced, has ensured the continuity of discharge capacity; In a cylinder body, there are two reciprocating pistons, two piston move toward one another or opposing motions simultaneously simultaneously, the discharge capacity of cylinder body is determined by the stroke of two pistons, compares one way reciprocating pump efficiency higher, discharge capacity is larger; The oil-feed of pump and fuel-displaced by bent axle control, compares valve plate of plunger pump control structure simple, compact; In movement process, cylinder body maximum radial component is determined apart from distance and the inside connecting rod length at crankshaft rotating center by crankshaft journal, suitably chooses this two parameters, can make cylinder body be subject to less radial component, thereby improves the working life of cylinder body; The opposed cylinder body group that can be also 90 degree at bent axle circumferential direction increase phase difference reduces flow oscillation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the plan view of the another kind of structure of the utility model, and this kind of structure has two groups of opposed cylinder bodies, on perpendicular to bent axle plane, circumferentially distributes along bent axle, and adjacent cylinders interval 90 is spent, two groups of corresponding same suite shaft necks of opposed cylinder body.
Fig. 3 is another kind of structural representation of the present utility model, and this kind of structure has two groups of opposed cylinder bodies, lays respectively at bent axle axial direction, forms the opposed cylinder body group of upper and lower two-stage.
In accompanying drawing, supporting base 1; Bent axle 2; First connecting rod group 3; Outside connecting rod 31; Inside connecting rod 32; Second connecting rod group 4; Outside connecting rod 41; Inside connecting rod 42; The first cylinder body 5; Cylinder body shell 51; Outer piston 52; Inner carrier 53; Oil inlet hole 54; Oil outlet 55; The second cylinder body 6; Cylinder body shell 61; Outer piston 62; Inner carrier 63; Oil inlet hole 64; Oil outlet 65.
Embodiment
Be described in further detail the utility model below in conjunction with drawings and Examples, but the utility model is not limited only to described embodiment.
Embodiment one
As shown in Figure 1, oppesed piston pump comprises supporting base (1), bent axle (2), first connecting rod group (3), second connecting rod group (4), the first cylinder body (5) and the second cylinder body (6) to this routine oppesed piston pump.Bent axle (2) two ends are supported by supporting base (1); The first cylinder body (5) and the second cylinder body (6) are opposite to bent axle (2) both sides, form one group of opposed cylinder body group; The first cylinder body (5) is provided with cylinder body shell (51), oil inlet hole (54), oil outlet (55) and reciprocating inner carrier (53) and outer piston (52) in cylinder body; The second cylinder body (6) is provided with cylinder body shell (61), oil inlet hole (64), oil outlet (65) and reciprocating inner carrier (63) and outer piston (62) in cylinder body; The corresponding first connecting rod group of the first cylinder body (5) (3), the corresponding second connecting rod group of the second cylinder body (6) (4); First connecting rod group (3) comprises inside connecting rod (32) and outside connecting rod (31), inside connecting rod (32) one end and inner carrier (53) are hinged, the other end and bent axle (2) axle journal is hinged, and outside connecting rod (31) one end and outer piston (52) are hinged, and the other end and crankshaft journal (2) are hinged; Second connecting rod group (4) comprises inside connecting rod (42) and outside connecting rod (41), inside connecting rod (42) one end and inner carrier (63) are hinged, the other end and bent axle (2) axle journal is hinged, and outside connecting rod (41) one end and outer piston (62) are hinged, and the other end and bent axle (2) axle journal is hinged; Depart from round about bent axle (2) rotating center with hinged bent axle (2) axle journal of inside connecting rod (32), (42) with hinged bent axle (2) axle journal of outside connecting rod (31), (41).
This routine oppesed piston pump working procedure is: bent axle (2) rotarily drives bent axle (2) axle journal and rotates around rotating center, in the operation cycle, spend in journey in bent axle (2) rotation 0 to 180, in the first cylinder body (5), outer piston (52) moves right, inner carrier (53) is to left movement, cylinder body shell (51) internal volume reduces, pressure increases, hydraulic oil is extruded from oil outlet (55), the middle outer piston (62) of opposed the second cylinder body (6) moves right with it simultaneously, inner carrier (63) is to left movement, cylinder body shell (61) internal volume increases, pressure reduces, hydraulic oil is pressed into cylinder body shell (61) by oil inlet hole (64), the first cylinder body (5) is fuel-displaced thus, the second cylinder body (6) oil-feed, spend in journey at bent axle (2) Rotate 180 to 360, in the first cylinder body (5), outer piston (52) is to left movement, inner carrier (53) moves right, cylinder body shell (51) internal volume increases, pressure reduces, hydraulic oil is pressed into cylinder body shell (51) by oil inlet hole (54), simultaneously with it in opposed the second cylinder body (6) outer piston (62) to left movement, inner carrier (63) moves right, cylinder body shell (61) internal volume reduces, and pressure increases, and hydraulic oil is extruded from oil outlet (65), the first cylinder body (5) oil-feed thus, the second cylinder body (6) is fuel-displaced.
Embodiment two
This routine oppesed piston pump is as Fig. 2, and on perpendicular to bent axle (2) plane, two groups of opposed cylinder bodies circumferentially distribute along bent axle (2), and adjacent cylinders interval 90 is spent, two groups of corresponding same suite shaft necks of opposed cylinder body, and all the other are with embodiment one.
Embodiment three
This routine oppesed piston pump is as Fig. 3, at bent axle (2) the axial direction two groups of opposed cylinder bodies of connecting, forms the opposed cylinder body group of upper and lower two-stage, and all the other are with embodiment one.
Claims (5)
1. an oppesed piston pump, comprises supporting base (1), bent axle (2), first connecting rod group (3), second connecting rod group (4), the first cylinder body (5) and the second cylinder body (6), it is characterized in that bent axle (2) two ends are supported by supporting base (1); The first cylinder body (5) and the second cylinder body (6) are opposite to bent axle (2) both sides, form one group of opposed cylinder body group; The first cylinder body (5) is provided with cylinder body shell (51), oil inlet hole (54), oil outlet (55) and reciprocating inner carrier (53) and outer piston (52) in cylinder body shell (51); The second cylinder body (6) is provided with cylinder body shell (61), oil inlet hole (64), oil outlet (65) and reciprocating inner carrier (63) and outer piston (62) in cylinder body shell (61); The corresponding first connecting rod group of the first cylinder body (5) (3), the corresponding second connecting rod group of the second cylinder body (6) (4); First connecting rod group (3) comprises inside connecting rod (32) and outside connecting rod (31), inside connecting rod (32) one end and inner carrier (53) are hinged, the other end and bent axle (2) axle journal is hinged, and outside connecting rod (31) one end and outer piston (52) are hinged, and the other end and bent axle (2) axle journal is hinged; Second connecting rod group (4) comprises inside connecting rod (42) and outside connecting rod (41), inside connecting rod (42) one end and inner carrier (63) are hinged, the other end and bent axle (2) axle journal is hinged, and outside connecting rod (41) one end and outer piston (62) are hinged, and the other end and bent axle (2) axle journal is hinged; Depart from round about bent axle (2) rotating center with hinged bent axle (2) axle journal of inside connecting rod (32), (42) with hinged bent axle (2) axle journal of outside connecting rod (31), (41).
2. oppesed piston pump according to claim 1, it is characterized in that described opposed cylinder body is equal to or greater than two groups, on perpendicular to bent axle (2) plane, circumferentially distribute along bent axle (2), the even interval of adjacent cylinders, organizes the corresponding same suite shaft neck of opposed cylinder body more.
3. oppesed piston pump according to claim 1, it is characterized in that described opposed cylinder body is equal to or greater than two groups, be distributed in bent axle (2) axial direction, form multistage opposed cylinder body group, in every grade of opposed cylinder body group, the cylinder body of identical turnover oil condition is positioned at bent axle (2) homonymy, the corresponding one-level connection rod set of every one-level opposed cylinder body and one-level crankshaft journal.
4. oppesed piston pump according to claim 3, is characterized in that in described multistage opposed cylinder body, every grade of opposed cylinder body has the opposed cylinder body of at least two groups, is circumferentially uniformly distributed along bent axle (2) with multiple cylinder bodies in one-level opposed cylinder body.
5. according to the oppesed piston pump described in claim 1,2,3 or 4, it is characterized in that oil inlet hole and oil outlet can be arranged on cylinder body shell, also can be arranged on inner carrier or outer piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017189.0U CN203685505U (en) | 2014-01-13 | 2014-01-13 | Opposed-piston pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420017189.0U CN203685505U (en) | 2014-01-13 | 2014-01-13 | Opposed-piston pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203685505U true CN203685505U (en) | 2014-07-02 |
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ID=51007416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420017189.0U Expired - Fee Related CN203685505U (en) | 2014-01-13 | 2014-01-13 | Opposed-piston pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203685505U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670989A (en) * | 2014-01-13 | 2014-03-26 | 四川大学 | Opposed piston pump |
-
2014
- 2014-01-13 CN CN201420017189.0U patent/CN203685505U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670989A (en) * | 2014-01-13 | 2014-03-26 | 四川大学 | Opposed piston pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20170113 |