CN206874471U - Plunger, plunger pump and hydraulic means - Google Patents
Plunger, plunger pump and hydraulic means Download PDFInfo
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- CN206874471U CN206874471U CN201720734641.9U CN201720734641U CN206874471U CN 206874471 U CN206874471 U CN 206874471U CN 201720734641 U CN201720734641 U CN 201720734641U CN 206874471 U CN206874471 U CN 206874471U
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- plunger
- cylinder body
- utility
- pump
- annular groove
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Abstract
The problem of the utility model provides a kind of plunger, plunger pump and hydraulic means, is related to hydraulic means technical field, and frictional force is larger between solution plunger and cylinder body, serious wear, and service life is shorter.The plunger includes：Plunger body, it is circumferentially arranged in the plunger body to have an annular groove.The plunger is applied to plunger pump, and lateral stress suffered by plunger is smaller in use, and the frictional force between plunger and cylinder body is smaller, and the degree of wear mitigates, and service life is longer.
Description
Technical field
Hydraulic means technical field is the utility model is related to, more particularly, to a kind of plunger, plunger pump and hydraulic means.
Background technology
At present, in hydraulic means, the pump of plunger 100 generally includes cylinder body and plunger 100, and cylinder is stretched into one end of plunger 100
In vivo, the other end is connected with driving structure, as shown in figure 1, plunger 100 is caused in the presence of driving structure by side force F
Plunger 100 sideling moves back and forth in the cylinder holes introversion of cylinder body.Due to the opposing cylinder of plunger 100 tilt, therefore, the aperture of cylinder holes and
Bottom hole is stress maximum point, this at two caused by excessive destroy between cylinder body and plunger 100 of side force have oil film so that
With plunger 100 dry friction occurs for cylinder body, and frictional force is larger.
Fig. 2 is plunger 100 when not wearing, the pressure-plotting of plunger 100 and cylinder gap, and the two lines in figure are respectively
The pressure distribution line of relative two side of plunger 100.After plunger 100 moves back and forth work for a long time, plunger 100 and cylinder body are equal
There is a certain degree of abrasion.
To sum up, plunger 100 of the prior art increases with usage time, and the rate of wear increases therewith, service life compared with
It is short.
Utility model content
The purpose of this utility model is to provide a kind of plunger, to solve present in prior art between plunger and cylinder body
Frictional force is larger, serious wear, the shorter technical problem of service life.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
Plunger provided by the utility model, including：Plunger body, it is circumferentially arranged in the plunger body to have an annular
Groove.
Further, the depth of the annular groove is 0.3mm.Between the both sides of the edge of the opening of the annular groove
Distance be 0.5mm.
Optionally, both ends relative in the plunger body are respectively connection end and free end, the annular groove and institute
State 1/3 of distance equal to the length of the plunger body of the free end of plunger body.
Preferably, the plunger body includes connected bar portion and connection head, and the annular groove is arranged at the bar
Portion, the annular groove are equal to the length of the bar portion with the bar portion away from the distance between the one end on the connection head
1/3。
Further, the bar portion is structure as a whole with the connection head.
It is preferred that the plunger body is formed from steel.
Relative to prior art, plunger described in the utility model has the advantage that：
In plunger provided by the utility model, annular groove is provided with the lateral surface of plunger body, therefore, in post
Fill in the course of work, annular groove changes the continuity contacted between plunger body lateral surface and cylinder body, so as to change post
The pressure distribution situation of plug and cylinder gap so that the lateral stress that the side of plunger is subject to reduces, so that plunger and cylinder body
Between frictional force reduce, the degree of wear of plunger reduces, service life increase.
Another object of the present utility model is to propose a kind of plunger pump, to solve plunger present in prior art and cylinder
Frictional force is larger between body, serious wear, the shorter technical problem of service life.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of plunger pump, including cylinder body and the plunger as described in above-mentioned technical scheme, one end of the plunger are stretched into described
In cylinder body.
Further, the cylinder body is made up of magnesium iron.
Alternatively, copper sleeve is inlaid with the cylinder body, one end of the plunger is stretched into the copper sleeve.
The plunger pump is same relative to Dominant Facies possessed by prior art with above-mentioned plunger, will not be repeated here.
Another object of the present utility model is to propose a kind of hydraulic means, with solve plunger present in prior art with
Frictional force is larger between cylinder body, serious wear, the shorter technical problem of service life.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of hydraulic means, it is characterised in that including the plunger pump as described in above-mentioned technical scheme.
The hydraulic means is same relative to Dominant Facies possessed by prior art with above-mentioned plunger pump, will not be repeated here.
Brief description of the drawings
Form a part of accompanying drawing of the present utility model to be used for providing further understanding to of the present utility model, this practicality is new
The schematic description and description of type is used to explain the utility model, does not form to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is the force analysis schematic diagram of the plunger of background technology；
Fig. 2 is the pressure-plotting one of the plunger in background technology；
Fig. 3 is the structural representation one for the plunger that the utility model embodiment one provides；
Fig. 4 is the schematic diagram figure that the plunger that the utility model embodiment one provides coordinates with cylinder body；
Fig. 5 is the pressure-plotting for the plunger that the utility model embodiment one provides；
Fig. 6 is the structural representation two for the plunger that the utility model embodiment one provides；
Fig. 7 is the structural representation one for the plunger annular recess that the utility model embodiment one provides；
Fig. 8 is the structural representation two for the plunger annular recess that the utility model embodiment one provides；
Fig. 9 is the structural representation for the plunger pump that the utility model embodiment two provides；
Figure 10 is the structural representation of cylinder body in the plunger pump that the utility model embodiment three provides.
In figure：
1- plunger bodies；11- bar portions；12- connections head；13- connection ends；14- free ends；2- annular grooves；
3- cylinder bodies；4- copper sleeves；100- plungers；A- stress maximum points.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
, it is necessary to illustrate in description of the present utility model, unless otherwise clearly defined and limited, term " in
The orientation or position relationship of the instruction such as the heart ", " on ", " under ", "left", "right", " vertical ", " level ", " interior ", " outer " are based on attached
Orientation or position relationship shown in figure, it is for only for ease of and describes the utility model and simplify to describe, rather than instruction or hint
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of utility model.In addition, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or
Imply relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
Embodiment one
As shown in figure 3, the utility model embodiment provides a kind of plunger, including plunger body 1, edge in plunger body 1
It is circumferentially provided with an annular groove 2.
The depth of the annular groove 2 is 0.3mm, that is to say, that the bottom of the annular groove 2 and the opening of annular groove 2
Between ultimate range be 0.3mm；The distance between both sides of the edge of opening of the annular groove 2 are 0.5mm, are being schemed
Shown in 7 and Fig. 8 on direction, the distance between the top open part, the left and right sides of annular groove 2 is 0.5mm.
The bottom surface of annular groove 2 can be plane or curved surface, as shown in fig. 7, the bottom surface of annular groove 2 is plane, such as
Shown in Fig. 8, the bottom surface of arc groove 2 is curved surface.
Plunger body 1 is prolonged into its length direction and is divided into three parts, and the part of centre is referred to as center section, will in addition
In two parts, the part being fully inserted into cylinder body is referred to as Part I, and a remaining part is referred to as Part II.Annular is recessed
Groove 2 is arranged at the outside of the Part I of plunger body 1.That is, annular groove 2 is stretched into cylinder body with plunger body 1
The distance between end face of one end is less than or equal to the 1/3 of the length of plunger body 1.
As shown in figure 3, when plunger body 1 is a cylinder, the driving machine in one end and plunger pump of plunger body 1
Structure connects, and this end is referred to as connection end 13, and the other end of plunger body 1 is stretched into cylinder body, and this end is referred to as free end 14, annular
The distance between free end 14 of groove 2 and plunger body 1 is the 1/3 of the total length of plunger body 1.
As shown in figure 4, when plunger body 1 includes two parts, respectively bar portion 11 and connection head 12, bar portion 11 is with connecting
Connector portions 12 are structure as a whole, and are once manufactured, and bar portion 11 is identical with the material for connecting head 12, and shape is different, bar portion 11
For cylinder, one end of bar portion 11 is stretched into cylinder body；The one end on connection head 12 is connected with bar portion 11, and the other end is spherical one
Side is connected with the drive mechanism in plunger pump, and under the drive of drive mechanism, connection head 12 drives bar portion 11 past in cylinder body
Multiple motion.Annular groove 2 is arranged at bar portion 11, and annular groove 2 with bar portion 11 away from the one end on connection head 12, (i.e. stretch by bar portion 11
Enter one end in cylinder body) the distance between be equal to bar portion 11 length 1/3.
In a kind of embodiment of the present embodiment, plunger body 1 is formed from steel.
When the plunger for providing the present embodiment is applied to plunger pump, one end of plunger is stretched into cylinder body, and the other end is with driving
Motivation structure connects, and opposing cylinder moves reciprocatingly under the drive of drive mechanism.
As shown in figure 4, when plunger body 1 is moved in cylinder body 3, because the opposing cylinder 3 of plunger body 1 tilts, therefore,
The aperture of cylinder holes and bottom hole are stress maximum point A.
Plunger body 1 and the pressure distribution equation of the cylinder holes gap location of cylinder body 3 are established, pressure difference stream is solved and is produced with shear flow
Pressure distribution plunger body 1 and cylinder holes deploy by surface area, establish pressure distribution equation caused by pressure difference stream and shear flow such as
Under：
In above-mentioned pressure distribution equation, implication corresponding to each symbol is as follows：
R- plunger body diameters；The cylinder holes diameter of D- cylinder bodies；ω-plunger angular speed；μ-fluid dynamic viscosity；vk-
Plunger linear velocity；H- gaps；P- pressure；- angle；lz- plunger contact length
Pressure distribution schematic diagram as shown in Figure 5 is drawn according to above-mentioned pressure distribution equation, in Figure 5, wherein a line
Top and the pressure distribution line of cylinder holes gap location for plunger body 1, another bottom for plunger body 1 and cylinder holes gap location
Pressure distribution line, the region that two pressure distribution lines are provided with annular groove 2 in plunger body 1 is overlapping.
Comparison diagram 5 and Fig. 2 understand that after annular groove 2 are provided with, plunger and the pressure distribution in cylinder holes gap become
Change, reduce side force, increase loading capacity of oil film, optimize the frictional behaviour of plunger, can be reliable under high speed, high pressure
Use.
Further, since the side force of plunger reduces, therefore reduces for the requirement can of the machining accuracy of cylinder body, so as to
Processing cost is reduced, improves the qualification rate of the plunger pump using the plunger for having the present embodiment to provide.
Embodiment two
As shown in figure 9, the utility model embodiment two provides a kind of plunger pump, the plunger pump that the present embodiment provides includes
The plunger that cylinder body 3 and embodiment one provide, copper sleeve 4 is inlaid with cylinder body 3, copper sleeve 4 is located in the cylinder holes of cylinder body 3,
One end of the plunger body 1 of plunger is extend into the copper sleeve 4 in cylinder body 3.Copper sleeve 4 can further mitigate cylinder body 3
The degree of wear, increase the service life of cylinder body 3, so as to improve the service life of plunger pump.
Compared with plunger pump of the prior art, ring is provided with the plunger in the plunger pump provided due to the present embodiment two
Connected in star 2, therefore, in the plunger course of work, lateral stress distribution situation that side that annular groove 2 changes plunger is subject to,
So that the lateral stress that the side of plunger is subject to reduces, so that the frictional force between plunger and cylinder body 3 reduces, the abrasion of plunger
Degree reduces, service life increase.
Simultaneously as the frictional force between plunger and cylinder body 3 reduces, therefore the degree of wear of cylinder body 3 also reduces, therefore,
The service life increase of plunger pump.
It is noted that a plunger and a cylinder body 3 are one group, multigroup plunger can be included in a plunger pump
With cylinder body 3, the plunger in each group is connected with same drive mechanism, and drive mechanism drives each plunger in its corresponding cylinder body 3
Interior reciprocating motion.
For example, plunger and cylinder body 3 are two groups, and drive mechanism is connecting rod, and the both ends of connecting rod connect with two plungers respectively
Connect, when connecting rod swing, wherein one end of connecting rod is close to a cylinder body 3, and the other end is away from another cylinder body 3, then with connecting
Two plungers of the corresponding connection in the both ends of bar, one of them is to the internal motion of cylinder body 3, and another is to the external movement of cylinder body 3.
Embodiment three
As shown in Figure 10, the utility model embodiment three provides a kind of plunger pump, the plunger pump bag that the present embodiment provides
Cylinder body 3 and the plunger of the offer of embodiment one are included, in the present embodiment, cylinder body 3 is made up of magnesium iron, and plunger is formed from steel.With implementation
The plunger pump provided in example two is distinguished as, and copper sleeve 4 is not provided with the cylinder body 3 for the plunger pump that the present embodiment three provides,
The plunger body 1 of plunger is directly inserted in the cylinder holes of cylinder body 3.
Compared with plunger pump of the prior art, the plunger in the plunger pump provided due to the present embodiment three is provided with annular
Groove 2, therefore the frictional force between plunger and cylinder body 3 reduces, therefore need not set copper sleeve 4 can also normal work.
Compared with plunger pump of the prior art, copper sleeve 4 need not be set in the plunger pump that the present embodiment three provides, because
This present embodiment three provide plunger pump cost it is relatively low, lighter in weight, service life it is longer or with post of the prior art
The service life for filling in pump is close.
The plunger pump that embodiment two provides with the present embodiment three respectively has advantage, and the plunger pump that embodiment two provides uses the longevity
It is relatively low to order the cost of the plunger pump longer, the present embodiment three provides, lighter in weight, can be selected according to use environment and demand
Select.
Example IV
The utility model embodiment four provides a kind of hydraulic means, including the plunger pump that embodiment three provides.
It is noted that may be provided with multiple plunger pumps in hydraulic means, according to use demand using one of them or
Multiple plunger pumps.
Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
- A kind of 1. plunger, it is characterised in that including：Plunger body, it is circumferentially arranged in the plunger body to have an annular recessed Groove.
- 2. plunger according to claim 1, it is characterised in that the depth of the annular groove is 0.3mm, and the annular is recessed The distance between both sides of the edge of opening of groove are 0.5mm.
- 3. plunger according to claim 1 or 2, it is characterised in that relative both ends are respectively and connected in the plunger body End and free end are connect, the distance of the free end of the annular groove and the plunger body is equal to the length of the plunger body 1/3。
- 4. plunger according to claim 1 or 2, it is characterised in that the plunger body includes connected bar portion and connection Head, the annular groove are arranged at the bar portion, and the annular groove is with the bar portion away from the one end on the connection head The distance between be equal to the bar portion length 1/3.
- 5. plunger according to claim 4, it is characterised in that the bar portion is structure as a whole with the connection head.
- 6. plunger according to claim 1, it is characterised in that the plunger body is formed from steel.
- 7. a kind of plunger pump, it is characterised in that the plunger including cylinder body and as described in claim any one of 1-6, the plunger One end stretch into the cylinder body.
- 8. plunger pump according to claim 7, it is characterised in that the cylinder body is made up of magnesium iron.
- 9. plunger pump according to claim 7, it is characterised in that copper sleeve, the plunger are inlaid with the cylinder body One end stretch into the copper sleeve.
- 10. a kind of hydraulic means, it is characterised in that including the plunger pump as described in claim any one of 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720734641.9U CN206874471U (en) | 2017-06-22 | 2017-06-22 | Plunger, plunger pump and hydraulic means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720734641.9U CN206874471U (en) | 2017-06-22 | 2017-06-22 | Plunger, plunger pump and hydraulic means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206874471U true CN206874471U (en) | 2018-01-12 |
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ID=61334607
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720734641.9U Active CN206874471U (en) | 2017-06-22 | 2017-06-22 | Plunger, plunger pump and hydraulic means |
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| Country | Link |
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| CN (1) | CN206874471U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035681A (en) * | 2017-06-22 | 2017-08-11 | 杭州力龙液压有限公司 | Plunger, plunger pump and hydraulic means |
-
2017
- 2017-06-22 CN CN201720734641.9U patent/CN206874471U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035681A (en) * | 2017-06-22 | 2017-08-11 | 杭州力龙液压有限公司 | Plunger, plunger pump and hydraulic means |
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