CN201162677Y - Rectangular piston variable-capacity mechanism - Google Patents
Rectangular piston variable-capacity mechanism Download PDFInfo
- Publication number
- CN201162677Y CN201162677Y CNU2008201016539U CN200820101653U CN201162677Y CN 201162677 Y CN201162677 Y CN 201162677Y CN U2008201016539 U CNU2008201016539 U CN U2008201016539U CN 200820101653 U CN200820101653 U CN 200820101653U CN 201162677 Y CN201162677 Y CN 201162677Y
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- piston
- cylinder
- main shaft
- eccentric wheel
- end cap
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Abstract
The utility model discloses a rectangular piston variable-volume mechanism, pertaining to a piston mechanism in machinery, which comprises a main shaft. The two ends of the main shaft are respectively supported by an upper end cover and a lower end cover; the middle of the main shaft is provided with an eccentric wheel; a piston bearing liner is arranged outside the eccentric wheel and a piston is arranged outside the piston bearing liner; the piston is arranged in the rectangular hole of a rotating cylinder; a mechanical shell is connected between the upper end cover and the lower end cover; the external circle of the rotating cylinder is pressed into a rotating cylinder bush and the outside of the rotating cylinder bush is the mechanical shell. The utility model has the most distinguished characteristics of high mechanical efficiency, compact structure, small volume, light weight and simple part structure. Especially, the spare parts which are necessary to ensure e=e1 size precision and position precision can be processed under one-time clamping through a digital-controlled lathe. These high-precision spare parts such as small-sized piston and eccentric wheel can be produced in high production efficiency ways of cold punching, cold squeezing and so on.
Description
Technical field
The utility model relates to the piston mechanism in the machineries such as gas compressor, vacuum pump, oil pump and explosive motor, a kind of specifically rectangle piston volume changing mechanism.
Background technique
Traditional volume-variable machine particularly adopts the portable volume-variable machine of piston, and piston all is a circular cross-section.Just there is the people that the constant speed turning-block linkage is studied from the eighties in last century, proposed to utilize its crank, guide rod, slide block all to make the characteristics of uniform rotation, made model machines such as commentaries on classics cylinder air compressor, refrigeration compressor, oil pump, and be referred to as " change cylinder machine ".The bent axle of this mechanism is crank, slider designs becomes double-acting piston, guide rod to make rotary cylinder body (commentaries on classics cylinder).Yet pass by for many years, " changeing the cylinder machine " do not use industrial.Trace it to its cause, following several respects arranged:
1, this design piston is the cylndrical surface, and this brings deficiency to general plotting:
(1) in cylindrical body commentaries on classics cylinder, radially processes two cylindrical cylinder holes.Make arrangement of mechanism loose, the seldom whole commentaries on classics cylinder in assembling space, back is a solid cylinder rod, makes gross weight high.
(2) under the situation that guarantees the structural design compactness, changeing cylinder, the boundary dimension of bent axle and the diameter of piston has certain proportionate relationship.Under given piston diameter (the oil transportation rate is certain), it is the mechanics requirement of high pressure oil pump that high-intensity main shaft is arranged, and this has just limited the application of this design in the oil pump field.In addition, this design is not seen hydrodynamic pressure as yet greater than 40kg/cm
2Model machine.And the high product of required precision is made pressure less than 63kg/cm
2Oil pump do not have economic implications.
2, piston directly is opened on changes the cylinder external diameter:
(1) cause whole commentaries on classics cylinder external cylindrical surface to become sealing strip into and out of fluid.Sealing strip is too wide, and the shearing force of lubricant oil has consumed a large amount of idle capacitys.
(2) connect fluid output prematurely, make system high pressure gas increase power consumption in the outlet port to-and-fro motion.
(3) also owing to connect fluid output prematurely, cause the gas that is sealed in the cylinder, compression ratio can not be set on demand.Thereby can not in explosive motor, use.
The model utility content
In order to overcome the deficiencies in the prior art, the objective of the invention is to provide a kind of and change circular piston into rectangular cross section; Change bent axle into eccentric wheel; And cover in outside changeing cylinder, adding, avoid the direct opening of piston, reduce a kind of rectangle piston volume changing mechanism of the sealing area of liquid inlet/outlet.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of rectangle piston volume changing mechanism, it is characterized in that: a main shaft is arranged, the two ends of main shaft are respectively by upper end cap and lower end cap supporting, the centre of main shaft is furnished with eccentric wheel, eccentric wheel is outward the piston bearing shell, the piston bearing shell is outward a piston, and piston is to pack into to change in the rectangular body opening of cylinder, is connected with casing between upper end cap and the lower end cap; The cylindrical that changes cylinder is pressed into the commentaries on classics cylinder sleeve, and the outside of changeing cylinder sleeve is a casing.
Described piston axis and commentaries on classics cylinder axis are orthogonal in twos in the space.
Described piston is a rectangular cross-sectional shape, and the long limit of cylinder shape is located at changes cylinder diameter on the cross section.
Described eccentric off-centre equals the off-centre that the spindle axis line changes the cylinder shaft axis relatively.
Described commentaries on classics cylinder sleeve should be offered aperture in corresponding part, piston two, and aperture can be square or circular.
The cross section of piston of the present utility model be rectangle (four jiaos can fall R) more precisely piston be rectangle with the cross section that cooperates of cylinder body, can not change under the situation of changeing the cylinder external diameter like this, shorten overall axial dimension, increase the piston transverse dimension, thereby can design high-intensity main shaft, and can have unnecessary radial dimension that crankshaft designs is become multidiameter shaft+eccentric assembling.Also can keep piston cross-section area and commentaries on classics cylinder boundary dimension constant, increase offset.
The beneficial effects of the utility model are: the maximum characteristics of the utility model are mechanical efficiency height, compact structure, volume is little, in light weight, design of part is simple.Especially need to guarantee the part of e=e1 dimensional accuracy and positional accuracy, can under a clamping, machine with numerical control machine tool.Undersized piston, eccentric wheel etc. even can produce these high-precision parts with high production rate modes such as cold stamping, cold hobbings.Also therefore this product is convenient to expand to directions such as miniaturizations.
Description of drawings
Fig. 1 is that vertical system twin-tub cold compressor is used full section view of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
1 lower end cap among the figure, 2 casings, 3 change cylinder, 4 pistons, 5 main shafts, 6 upper end caps, 7 eccentric wheels, 8 change cylinder sleeve, 9 piston bearing shells.
Embodiment
Embodiment 1:
A main shaft 5 is arranged, the two ends of main shaft 5 are respectively by upper end cap 6 and lower end cap 1 supporting, the centre of main shaft 5 is furnished with two eccentric wheels 7, outside the eccentric wheel 7 is piston bearing shell 9, outside the piston bearing shell 9 is piston 4, piston 4 is respectively charged in two rectangular body openings that change cylinder 3, is connected with casing 2 between upper end cap 6 and the lower end cap 1; The cylindrical that changes cylinder 3 is pressed into changes cylinder sleeve 8, and the outside of changeing cylinder sleeve 8 is a casing 2.
Present embodiment must guarantee that eccentric eccentric e1 equals the eccentric e that the spindle axis line changes the cylinder shaft axis relatively, changes cylinder sleeve 8 and offers square aperture in corresponding part, piston 4 two, with minimizing sealing strip area, and improves compression ratio.The cross section of piston 4 is a rectangle, be piston with the cross section that cooperates of cylinder body be rectangle, can not change under the situation of changeing the cylinder external diameter like this, shorten overall axial dimension, increase the piston transverse dimension, thereby can design high-intensity main shaft, and can have unnecessary radial dimension that crankshaft designs is become multidiameter shaft+eccentric assembling.Also can keep piston cross-section area and commentaries on classics cylinder boundary dimension constant, increase displacement thereby increase eccentric amount e.The present embodiment refrigeration compressor changes e=5 into e=7.5 exactly on original basis, increase displacement 50%.The characteristics of present embodiment are that mechanical efficiency height, compact structure, volume are little, in light weight, simple in structure.
Claims (5)
1, a kind of rectangle piston volume changing mechanism, it is characterized in that: a main shaft is arranged, the two ends of main shaft are respectively by upper end cap and lower end cap supporting, the centre of main shaft is furnished with eccentric wheel, eccentric wheel is outward the piston bearing shell, the piston bearing shell is outward a piston, and piston is to pack into to change in the rectangular body opening of cylinder, is connected with casing between upper end cap and the lower end cap; The cylindrical that changes cylinder is pressed into the commentaries on classics cylinder sleeve, and the outside of changeing cylinder sleeve is a casing.
2, a kind of rectangle piston volume changing mechanism according to claim 1 is characterized in that: described piston axis and commentaries on classics cylinder axis are orthogonal in twos in the space.
3, a kind of rectangle piston volume changing mechanism according to claim 1 is characterized in that: described piston is a rectangular cross-sectional shape, and the long limit of cylinder shape is located at changes cylinder diameter on the cross section.
4, a kind of rectangle piston volume changing mechanism according to claim 1 is characterized in that: described eccentric off-centre equals the off-centre that the spindle axis line changes the cylinder shaft axis relatively.
5, a kind of rectangle piston volume changing mechanism according to claim 1 is characterized in that: described commentaries on classics cylinder sleeve should be offered aperture in corresponding part, piston two, and aperture can be square or circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201016539U CN201162677Y (en) | 2008-03-18 | 2008-03-18 | Rectangular piston variable-capacity mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201016539U CN201162677Y (en) | 2008-03-18 | 2008-03-18 | Rectangular piston variable-capacity mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201162677Y true CN201162677Y (en) | 2008-12-10 |
Family
ID=40183615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201016539U Expired - Fee Related CN201162677Y (en) | 2008-03-18 | 2008-03-18 | Rectangular piston variable-capacity mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201162677Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303003B (en) * | 2008-04-02 | 2014-07-16 | 王建宇 | Rectangle piston volume changing mechanism |
| WO2017024862A1 (en) * | 2015-08-07 | 2017-02-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Fluid machine, heat exchanger, and operating method of fluid machine |
-
2008
- 2008-03-18 CN CNU2008201016539U patent/CN201162677Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303003B (en) * | 2008-04-02 | 2014-07-16 | 王建宇 | Rectangle piston volume changing mechanism |
| WO2017024862A1 (en) * | 2015-08-07 | 2017-02-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Fluid machine, heat exchanger, and operating method of fluid machine |
| US10941771B2 (en) | 2015-08-07 | 2021-03-09 | Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai | Fluid machinery, heat exchange equipment, and operating method for fluid machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20120318 |