CN103758729A - Piston device - Google Patents
Piston device Download PDFInfo
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- CN103758729A CN103758729A CN201410049730.0A CN201410049730A CN103758729A CN 103758729 A CN103758729 A CN 103758729A CN 201410049730 A CN201410049730 A CN 201410049730A CN 103758729 A CN103758729 A CN 103758729A
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- piston
- pad
- clearance
- piston rod
- regulates
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Abstract
The embodiment of the invention provides a piston device which comprises a piston rod, a locking nut and a piston. The locking nut and the piston are connected in sequence through the piston rod, a clearance adjusting gasket is further included, and the clearance adjusting gasket is arranged on the piston rod in a sleeved mode and at one end of the piston. According to the piston device, the clearance of a single-action differential piston structure in a piston type compressor can be adjusted more flexibly and more conveniently, the piston of a gland sealing groove and the positions of air inlets and outlets of a valve cage cannot be influenced, and bad influence on the normal operation of a machine and the relative position arrangement of other components is not generated.
Description
Technical field
The present invention relates to mechanical design field, particularly a kind of piston apparatus.
Technical background
In piston compressor, often adopt single-acting step piston structure, under normal circumstances, the axle head of piston leaves clearance, and clearance can avoid piston end, arbor etc. to bump with cylinder, and the large I of clearance is calculated and is obtained by heating power.But due to the variation of operating mode, or due to the variation of working medium, the clearance of piston axle head need increase or reduce.For realizing the variation of clearance, conventionally have two kinds of solutions, but this two schemes there is deficiency separately.
As shown in Figure 1, a kind of scheme is thickening valve seat pad 4, and valve seat pad 4 is angle type pad, all can have the effect of thickening in horizontal and vertical direction, and wherein the thickening in Vertical direction can reach the effect that regulates clearance 9.If but valve seat pad 4 thickness is excessive in the horizontal direction, can make gland seal groove 2 exceed valve port cylinder 1, thereby lose sealing effect; Also can make valve cage port 3 be blocked by valve port cylinder 1, intake and exhaust area be reduced, thereby cause intake and exhaust amount to reduce, conventionally do not reach regulating index simultaneously.
Another kind of scheme is that a part of material that removes piston 7 axle heads increases clearance 9.But the quality of the material being removed can exceed dynamic balancing index conventionally, thereby causes unit vibration to exceed standard; In addition,, for the piston of having made cure process, the removal of material is difficult to realize especially.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of piston apparatus, and this device exquisite composition is easy to use, clearance is regulated more accurate.
In order to achieve the above object, a kind of piston apparatus that the embodiment of the present invention provides comprises piston rod, locking nut and piston, locking nut is connected by piston rod successively with piston, further comprises that clearance regulates pad, and clearance regulates pad to be sleeved on piston rod and is positioned at one end of piston.
Wherein, clearance regulates the center of pad to be provided with center hole, and the shape of center hole is identical with the sectional shape of piston rod.
Wherein, the aperture size of center hole is equal to or greater than the sectional dimension of piston rod.
Wherein, clearance regulates pad to be set on piston rod by its center hole is dismountable.
Wherein, the number of clearance adjusting pad is one or more.
Wherein, the thickness of clearance adjusting pad is one or more.
Wherein, when clearance regulates the quantity of pad to be two or more, it is identical or different that clearance regulates the thickness of pad.
Wherein, between locking nut and piston rod for being threaded.
Wherein, between piston and piston rod, be Spielpassung.
Utilize technological scheme provided by the invention, clearance regulates pad to be installed at one end of piston, can not affect the position of gland seal groove and valve cage port, thereby has solved the poor and little deficiency of intake and exhaust quantitative change of sealing effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of piston apparatus of providing of prior art
Fig. 2 is the structure schematic diagram of a kind of piston apparatus knot that provides of the embodiment of the present invention.
Fig. 3 is the structural representation of the another kind of piston apparatus that provides of the embodiment of the present invention.
Embodiment
For making object of the present invention, technological scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Fig. 2 is the structural representation of a kind of piston apparatus provided by the invention.As shown in Figure 2, this piston apparatus comprises that piston rod 5, locking nut 6, piston 7 and clearance regulate pad 8, locking nut 6, piston 7 and clearance regulate pad 8 socket successively on piston rod 5, and clearance regulates pad 8 to be positioned at one end of piston 7, and one end refers to lid end or the axle head of piston 7.With by installing valve seat pad 4 additional at valve seat place to regulate compared with clearance 9, can not affect the position of gland seal groove and valve cage port, thereby solve the poor and little deficiency of intake and exhaust quantitative change of sealing effect.Simultaneously, owing to piston 7 not being processed, compared with removing a part of material of piston 7 axle heads in prior art, can not cause the processing inconvenience after dynamic balancing parameter deficiency and material sclerosis, and save the material, the loss of machine and the increase of cost that by unnecessary work, are brought.
The shape of the center hole of clearance adjusting pad 8 is identical with the sectional shape of piston rod 5, and the aperture size of its center hole is equal to or greater than the sectional dimension of piston rod 5.Therefore, clearance regulates pad 8 can be sleeved on smoothly on piston rod 5, can not cause harmful effect to the normal operation of the relative position of other members and machine simultaneously.In addition, clearance regulates pad 8 quality less, can not exceed dynamic balancing index, the vibration that can not strengthen unit.
In an embodiment of the present invention, clearance regulates pad 8 to be set on piston rod 5 by its center hole is dismountable.It can be one or more that clearance regulates the quantity of pad 8, and thickness be one or more, and when its quantity is two or more, the thickness of multiple clearances adjusting pads 8 can be identical also can difference.Clearance regulates quantity and the thickness of pad 8 to be determined by actual demand like this, makes the structure of piston apparatus more flexible.
Fig. 3 is the structural representation of another kind of piston apparatus provided by the invention, as shown in Figure 3, from embodiment illustrated in fig. 2 in only comprise clearance and regulate pad 8 different, embodiment illustrated in fig. 3ly comprise multiple clearances and regulate pads 8.By the clearance of flexible selection varying number and different-thickness, regulate pad 8 can obtain different clearance 9.Meanwhile, clearance regulates pad 8 to produce in batches, and material is various, easy to process, can make piston apparatus adapt to different compressor demands.
In an embodiment of the present invention, clearance regulates the installation process of pad 8 to be: after unload lock jack panel 6 and piston 7, install clearance additional and regulate pad 8.Locking nut 6, piston 7 and clearance regulate pad 8 socket successively on piston rod 5 like this.
In an embodiment of the present invention, between locking nut 6 and piston rod 5, for being threaded, between piston 7 and piston rod 5, be Spielpassung.Such topology layout science is simple, has good applicability in compressor, and bearing capacity is high.
It will be understood by those skilled in the art that clearance regulates pad 8 can be positioned at axle head or the lid end of piston, the present invention is not limited by the fastening means between piston kind and piston and piston rod.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a piston apparatus, comprise piston rod, locking nut and piston, described locking nut is connected by described piston rod successively with described piston, it is characterized in that, further comprise that clearance regulates pad, described clearance regulates pad to be sleeved on described piston rod and is positioned at one end of described piston.
2. piston apparatus according to claim 1, is characterized in that, described clearance regulates the center of pad to be provided with center hole, and the shape of described center hole is identical with the sectional shape of described piston rod.
3. piston apparatus according to claim 2, is characterized in that, the aperture size of described center hole is equal to or greater than the sectional dimension of described piston rod.
4. according to arbitrary described piston apparatus in claims 1 to 3, it is characterized in that, described clearance regulates pad to be set on described piston rod by center hole described in it is dismountable.
5. piston apparatus according to claim 1, is characterized in that, it is one or more that described clearance regulates the number of pad.
6. piston apparatus according to claim 1, is characterized in that, it is one or more that described clearance regulates the thickness of pad.
7. piston apparatus according to claim 6, is characterized in that, when described clearance regulates the quantity of pad to be two or more, it is identical or different that described clearance regulates the thickness of pad.
8. piston apparatus according to claim 1, is characterized in that, between described locking nut and described piston rod for being threaded.
9. piston apparatus according to claim 1, is characterized in that, between described piston and described piston rod, is Spielpassung.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410049730.0A CN103758729A (en) | 2014-02-13 | 2014-02-13 | Piston device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410049730.0A CN103758729A (en) | 2014-02-13 | 2014-02-13 | Piston device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103758729A true CN103758729A (en) | 2014-04-30 |
Family
ID=50526023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410049730.0A Pending CN103758729A (en) | 2014-02-13 | 2014-02-13 | Piston device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103758729A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881265A (en) * | 1981-11-05 | 1983-05-16 | Mikuni Jukogyo Kk | Piston for reciprocal gas compressor |
| JPH05332252A (en) * | 1992-06-02 | 1993-12-14 | Oofuji Packing Kk | Air pump |
| CN101634289A (en) * | 2009-08-21 | 2010-01-27 | 攀枝花新钢钒股份有限公司 | Method for reducing end face clearance volume of piston type compressor cylinder |
| CN201401307Y (en) * | 2009-04-14 | 2010-02-10 | 苏州中成汽车空调压缩机有限公司 | Variable displacement rotary swash plate compressor |
| CN202883311U (en) * | 2012-10-09 | 2013-04-17 | 天津凯德实业有限公司 | Thread type differential piston connecting structure |
| CN203730244U (en) * | 2014-02-13 | 2014-07-23 | 天津凯德实业有限公司 | Piston device |
-
2014
- 2014-02-13 CN CN201410049730.0A patent/CN103758729A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881265A (en) * | 1981-11-05 | 1983-05-16 | Mikuni Jukogyo Kk | Piston for reciprocal gas compressor |
| JPH05332252A (en) * | 1992-06-02 | 1993-12-14 | Oofuji Packing Kk | Air pump |
| CN201401307Y (en) * | 2009-04-14 | 2010-02-10 | 苏州中成汽车空调压缩机有限公司 | Variable displacement rotary swash plate compressor |
| CN101634289A (en) * | 2009-08-21 | 2010-01-27 | 攀枝花新钢钒股份有限公司 | Method for reducing end face clearance volume of piston type compressor cylinder |
| CN202883311U (en) * | 2012-10-09 | 2013-04-17 | 天津凯德实业有限公司 | Thread type differential piston connecting structure |
| CN203730244U (en) * | 2014-02-13 | 2014-07-23 | 天津凯德实业有限公司 | Piston device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140430 |
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| WD01 | Invention patent application deemed withdrawn after publication |