CN209604247U - Piston limit structure, compressor and heat exchange equipment - Google Patents
Piston limit structure, compressor and heat exchange equipment Download PDFInfo
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- CN209604247U CN209604247U CN201822129873.9U CN201822129873U CN209604247U CN 209604247 U CN209604247 U CN 209604247U CN 201822129873 U CN201822129873 U CN 201822129873U CN 209604247 U CN209604247 U CN 209604247U
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Abstract
The utility model relates to compressor field, a kind of piston limit structure, compressor and heat exchange equipment are specifically provided.Piston limit structure includes: cylinder, has perpendicular to cylinder-bore axis direction and run through the piston hole of cylinder, and piston hole is being projected as circle in through direction；Piston is shape-ordinatedly set in piston hole and can reciprocatingly slide in piston hole, confined planes offered on the side wall of piston, confined planes are in the length along piston axial direction not through the both ends of piston side wall；And locating part, it offers on cylinder and penetrates through from cylinder outer wall to the limit hole of piston hole, locating part is shape-ordinatedly installed in limit hole, and locating part is abutted with confined planes to limit piston around itself and axially rotate.Piston limit mechanism provided by the utility model will not introduce clearance volume, more preferable to piston limit effect.
Description
Technical field
The utility model relates to compressor fields, and in particular to a kind of piston limit structure, compressor and heat exchange equipment.
Background technique
Turning the cylinder piston compressor is a kind of compressor based on the work of crosshead shoe principle, and cylinder turns in cylinder jacket
Dynamic, piston is horizontally installed in the piston hole of cylinder, and is reciprocatingly slided in piston hole, thus end face, piston hole in piston
Side wall and cylinder jacket inner wall between form compression chamber.
In order to guarantee the laminating degree and applicability between piston and piston hole, for the angle of manufacture, using circle
Piston hole and cylindrical cross-section piston be clearly it is optimal, be easiest to guarantee machining accuracy.However, in this case,
Since piston hole is horizontally installed in cylindrical piston, the edges at two ends of piston hole is actually mutually passing through for two cylinders
Line, thus circumferentially length everywhere is consecutive variations.Equally, the edges at two ends of piston is also the intersection of two cylinders
(consistent with the edges at two ends of piston hole), piston are also consecutive variations along its circumferential length everywhere.In the ideal situation, living
The bus of plug head (i.e. end face) should be parallel with the bus of cylinder outer surface, and such piston can be in the terminal of reciprocating motion
The inner wall perfection fitting (i.e. piston end surface and cylinder outer surface constitute the cylindrical surface completed) of cylinder jacket, completes exhaust.However, real
Border be taken in using circular cross-section piston when, in the process of running, relative to cylinder rotation can occur for piston, due to piston and work
The length of consent circumferentially everywhere is all consecutive variations, therebetween once relative rotation occurs, outside piston end surface and cylinder
Surface just cannot form complete cylindrical surface, and piston crown and cylinder liner internal wall will be caused during piston is compressed
Interference, cause to hit cylinder.
Cylinder is hit in order to solve the problems, such as that circular piston can generate, is compressed in the prior art using two schemes to the cylinder piston is turned
Machine improves.
First is that the piston hole of cylinder also needs to be set as non-circular shape accordingly, non-circular knot using non-circular piston
Structure processing technology is bad, is unfavorable for large-scale production, and be difficult to, precision is difficult to ensure.And piston and cylinder cooperate
Shelves size is matched there are multiple in face, such as two on-circular cross-section outside diameters, semicircle cambered surface distance of center circle, parallel segment length, piston be wide
Degree etc., assembling process is difficult to guarantee the fit clearance between piston and cylinder simultaneously, influences compressor assembly and performance.And it is non-
There are moderate finite deformations when circular piston parallel-segment actual motion, influence compressor reliability.
Second is that position limiting structure is axially added in circular piston, so that piston rotation is limited, specially in the axis of circular piston
Pin is set on face, and opens up perforative pin avoiding hollow groove in the piston hole corresponding position of cylinder, passes through pin and avoiding hollow groove pair
Piston is limited, and prevents piston from rotating.However in this scheme, although piston is circular piston, due to passing through
The setting of avoiding hollow groove is worn, corresponding piston hole is actually non-circular, avoiding hollow groove and bayonet fittings, so that the end position of avoiding hollow groove
It is intracavitary in suction and discharge, it will affect the suction and discharge process of the pump housing, while natural clearance volume can be introduced in compressed ends.And pin
And the cooperation of avoiding hollow groove is located between two compression chambers, needs to guarantee two cavity sealings, thus belong to finishing position, for
Cylinder is still needed using the special processing technology for being unfavorable for large-scale production such as wire cutting.Therefore, how circular piston is solved
Cylinder problem of hitting become to improve and turn the important research direction of the cylinder piston compressor.
Utility model content
Rotation, which can occur, for solution circular piston in the prior art causes piston crown and cylinder liner internal wall to be interfered even
Cylinder, simultaneously the technical issues of position limiting structure can introduce natural clearance volume between circular piston and cylinder are hit, the utility model mentions
A kind of piston limit structure for preventing piston rotation while precision height being cooperated not introduce clearance volume is supplied.
Meanwhile clearance volume can be introduced, to adding to solve the existing circular piston position limiting structure turned in the cylinder piston compressor
The demanding technical problem of work technique, the utility model provide a kind of pressure using circular piston that will not introduce clearance volume
Contracting machine.
Further more, to solve technical problem similar to the above, the utility model additionally provides a kind of heat exchange equipment.
In a first aspect, the utility model provides a kind of piston limit structure, comprising:
Cylinder has perpendicular to the cylinder-bore axis direction and runs through the piston hole of the cylinder, and the piston hole is on edge
Circle is projected as in the through direction；
Piston is shape-ordinatedly set in the piston hole and can reciprocatingly slide in the piston hole, the piston
Confined planes are offered on side wall, the confined planes are in the length along the piston axial direction not through the two of the piston side wall
End；And
Locating part is offered on the cylinder and is penetrated through from the cylinder outer wall to the limit hole of the piston hole, the limit
Position part is shape-ordinatedly installed in the limit hole, and the locating part is abutted with the confined planes to limit the piston around certainly
Body axially rotates.
The limit hole is penetrated through from the cylinder end face to the piston hole and parallel with the axis direction of the cylinder.
Position of the limit hole on the cylinder is corresponding with 1/2 position of the piston hole axial direction.
When the piston reciprocatingly slides in the piston hole, meet:
L1-L2≥S
Wherein, L1For length of the confined planes on the piston axial direction, L2It is the locating part along the piston
Length on axial direction, S are the stroke that piston slides in the cylinder.
The confined planes are plane, are arranged at 1/2 position of the piston radial short transverse.
When the locating part is abutted with the confined planes, meet:
Wherein, D1It is the piston along the diameter of axial projection, D2It is the locating part on the piston radial direction
Length, L be locating part piston centre described in the centre distance on the piston radial direction length.
When the locating part is abutted with the confined planes, meet:
Wherein, D1It is the piston along the diameter of axial projection, D2It is the locating part on the piston radial direction
Length, L be locating part piston centre described in the centre distance on the piston radial direction length.
The limit hole is along 1/2 position that the cylinder end face extends to the cylinder axial height.
The limit hole number is one, is arranged in the cylinder upper surface or lower end surface.
The limit hole number is two, is arranged on the cylinder upper surface/lower end surface and is located at the cylinder-bore axis
Two sides or upper surface be located at the side of the cylinder-bore axis and lower end surface and be located at the side of the cylinder-bore axis.
The limit hole runs through the cylinder, and at least side being set in the cylinder-bore axis two sides.
The locating part is cylindrical position-limitting pin.
Second aspect, the utility model additionally provide a kind of compressor, comprising:
Shaft；
Above-mentioned piston limit structure, the cylinder and the piston are equipped with along the perforative axis of cylinder axial direction
Hole, for installing the shaft；And
Cylinder jacket, the cylinder are set in the cylinder jacket and are driven by the shaft and rotated.
The third aspect, the utility model provide a kind of heat exchange equipment, including above-mentioned piston limit structure.
The heat exchange equipment is air-conditioning.
The technical solution of the utility model has the following beneficial effects:
1) piston limit structure provided by the utility model, including cylinder, piston and locating part, cylinder have perpendicular to gas
Cylinder axis direction and the piston hole for running through cylinder, piston hole is projected as circle in through direction, piston-shaped ordinatedly to set
In that can reciprocatingly slide in piston hole and in piston hole, using circular piston and circular piston hole, the craftsmanship of piston and cylinder
Well, easy to process, guarantee machining accuracy, is easy to large-scale production, and the distance of the piston hole of cylinder to cylinder end face is uniform
Transition, similar arch bridge structure, structure is firmer, is unlikely to deform, while circular piston and the cooperation of circular cylinder piston hole, favorably
Fit-up gap between control piston and cylinder advantageously reduces friction power loss, reduces leakage, to improve piston compressor
Performance.Offer confined planes on the side wall of piston, confined planes in the length along piston axial direction not through the both ends of piston side wall,
Avoiding hollow groove is not present between piston and cylinder inner wall, confined planes are not connected to cavity volume, clearance volume will not be introduced, so that turning cylinder
Compressor operating is more stable.It offers on cylinder and penetrates through from cylinder outer wall to the limit hole of piston hole, locating part is shape-ordinatedly
It is installed in limit hole, locating part is abutted with confined planes to limit piston around itself and axially rotate.Setting is mounted on cylinder
Confined planes on locating part and piston cooperate, convenient for the assembly of workpiece, production easy to process, while matching between piston and cylinder
Shelves size is reduced, and effectively controls piston and cylinder fit clearance, reduces the friction power loss between piston and cylinder, promotes compressor
Energy.
2) piston limit structure provided by the utility model, limit hole along cylinder end face penetrate through to piston hole and with cylinder
Axis direction is parallel, sets vertical direction for the limit hole of cylinder and locating part, and locating part will not interfere with rotational cylinder, so that
Rotational cylinder is more reliable and more stable.
3) 1/2 position of piston hole axial direction is arranged in piston limit structure provided by the utility model, limit hole
Place, satisfaction when piston reciprocatingly slides in piston hole: L1-L2S, wherein L1It is the confined planes along the piston axial direction
On length, L2For length of the locating part on the piston axial direction, S is the row that piston slides in the cylinder
Journey.The length of confined planes is greater than the summation of locating part and length of piston travel, to guarantee that piston will not be hit when reciprocatingly sliding
Locating part is hit, guarantees stability and reliability.
4) piston limit structure provided by the utility model, confined planes are plane, convenient for the processing and assembly of confined planes, together
When guarantee machining accuracy it is higher.Confined planes are arranged at 1/2 position of piston radial height, when locating part is abutted with confined planes
Meet:Wherein, D1For the diameter of the piston, D2It is the locating part in the piston radial side
Upward length, L are the length of locating part piston centre described in the centre distance on the piston radial direction.When full
FootWhen, a part of locating part is abutted with confined planes, to limit to piston.When in satisfactionWhen, a part at the effect end abutted on locating part with confined planes is connected on the inner wall of limit hole, a part
It is connected on confined planes, locating part subtracts the power indirectly-acting of locating part when rotation occurs for piston on cylinder without cantilever part
Stress suffered by small locating part reduces the intensity requirement of locating part, improves compressor operating stability and reliability.
5) piston limit structure provided by the utility model, limit hole extend to the 1/ of cylinder axial height along cylinder end face
At 2 positions, increase the length of locating part, so that locating part and confined planes contact area are bigger, the pressure of abutment portion is small, is not easy
Deformation, while limit hole can be set to one or more, so that limit effect is more preferable.
6) piston limit structure provided by the utility model, locating part are cylindrical position-limitting pin, and the processing is simple for pin, at
This is low, is easy to guarantee precision, while pin and piston limit face contact area are small, and to piston sliding, friction is small, to work
Plug reciprocatingly slide interfere it is small so that compressor operating is more stable.
7) compressor provided by the utility model, including shaft, above-mentioned piston limit structure and cylinder jacket, cylinder and work
It is equipped with beyond the Great Wall along the axial perforative axis hole of cylinder, cylinder is set in cylinder jacket and is driven by shaft and rotated, due to the compression equipment
There is above-mentioned piston limit structure, therefore there are above-mentioned all beneficial effects.
8) heat exchange equipment provided by the utility model including above-mentioned piston limit structure, therefore has above-mentioned all
Beneficial effect.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the perspective view of the explosion of compressor in a kind of embodiment provided by the utility model；
Fig. 2 is the assembling structure cross-sectional view of compressor in a kind of embodiment provided by the utility model；
Fig. 3 is structural representation of air cylinder in a kind of embodiment provided by the utility model；
Fig. 4 is piston structure schematic diagram in a kind of embodiment provided by the utility model；
Fig. 5 is the top view and sectional view of cylinder in a kind of embodiment provided by the utility model；
Fig. 6 is the cross-sectional view of locating part and piston assembly in a kind of embodiment provided by the utility model；
Fig. 7 is the cross-sectional view of locating part and piston assembly in second of embodiment provided by the utility model；
Fig. 8 is the cross-sectional view of locating part and piston assembly in the third embodiment provided by the utility model；
Fig. 9 is the cross-sectional view of locating part and piston assembly in the 4th kind of embodiment provided by the utility model；
Figure 10 is the cross-sectional view of locating part and piston assembly in the 5th kind of embodiment provided by the utility model；
Figure 11 is the cross-sectional view of locating part and piston assembly in the 6th kind of embodiment provided by the utility model；
Figure 12 is the cross-sectional view of locating part and piston assembly in the 7th kind of embodiment provided by the utility model；
Description of symbols:
1- cylinder；11- piston hole；12- pilot hole；13- limit hole；2- piston；21- confined planes；22- axis hole；3- limit
Part；4- upper flange；5- lower flange；6- shaft；7- cylinder jacket.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.As long as in addition, technical characteristic involved in the utility model difference embodiment disclosed below that
Not constituting conflict between this can be combined with each other.
The cylinder piston compressor in the prior art that turns includes flange, cylinder jacket, cylinder, piston and shaft, is slided based on cross
Block principle makes piston reciprocatingly slide during rotation relative to cylinder, thus both ends and cylinder and cylinder jacket in piston
Form compression chamber and discharge chamber.Thus for turning the piston of the cylinder piston compressor, need that piston occurs around own axes
The freedom degree of rotation is limited, piston limit structure provided by the utility model, can be used in the prior art turning the cylinder piston
Compressor limits piston to realize.Fig. 1 shows a kind of reality of the utility model piston limit structure into Fig. 6
Apply mode.
Piston limit structure provided by the utility model includes cylinder 1, piston 2 and locating part 3.Such as Fig. 1 to Fig. 6 institute
Show, in the present embodiment, cylinder 1 is cylinder block, offers the pilot hole 12 through cylinder 1 in the axial direction of cylinder 1, is filled
Distribution 12 is passed through for shaft 6.The piston hole of cylinder 1 is offered perpendicular to 12 direction of pilot hole and run through on the outer peripheral surface of cylinder 1
11, piston hole 11 is being projected as circle on itself axial direction.
As shown in figure 4, piston 2 is shape-ordinatedly set in piston hole 11 and can reciprocatingly slide in piston hole 11.Piston 2
It is adapted to piston hole 11, piston 2 is similar cylindrical structure, and the both ends end face of piston 2 is to cooperatively form completion with piston hole 11
The axial length of the curved-surface structure on cylindrical surface, piston 2 is less than 1 radial dimension of cylinder, so that piston 2 does reciprocal cunning in cylinder 1
It is dynamic.2 middle part of piston is offering axis hole 22 along 1 axis direction of cylinder, and when piston 2 is installed in piston hole 11, shaft 6 is worn
Axis hole 22 on the pilot hole 12 and piston 2 of cylinder 1 out.Confined planes 21 are offered on the side wall of piston 2, confined planes 21 are along work
Not through the both ends of 2 side wall of piston in the axial length of plug 2.As shown in figure 4, in the present embodiment, confined planes 21 are set as
Plane, molding easy to process are limited, while confined planes 21 are arranged at 1/2 position in 2 radial height direction of piston.
It offers on cylinder 1 and penetrates through from 1 outer wall of cylinder to the limit hole 13 of piston hole 11, locating part 3 is shape-ordinatedly pacified
Loaded in limit hole 13, locating part 3 is abutted with confined planes 21 to limit piston 2 and rotation occurs.As shown in figure 3, in this embodiment party
In formula, limit hole 13 is penetrated through from 1 end face of cylinder to piston hole 11 and parallel with the axis direction of cylinder 1, and the setting of limit hole 13 exists
On the vertical direction of cylinder 1, so that locating part 3 is abutted with confined planes 21 in vertical direction, it is convenient for 13 machine-shaping of limit hole, and
And abutting direction is vertical with the rotation direction of cylinder 1 and piston 2, locating part 3 is not by the rotating torque of horizontal direction, position limiting structure
It is more stable and reliable.Simultaneously in the present embodiment, it is the machine-shaping and accuracy guarantee convenient for locating part 3, limit hole 13 is set
For round hole, the corresponding locating part 3 that is arranged is cylindrical pin pin structure, and round pin and limit hole 13 cooperate, it is preferable that setting
The fit clearance of the two is 0-0.05mm.1/2 position phase of position of the limit hole 13 on cylinder 1 and 11 axial direction of piston hole
The central location that correspondence, i.e. locating part 3 are mounted on 11 length direction of piston hole.
As shown in fig. 6, when the assembly of piston 2, cylinder 1 and locating part 3, by the assembly of piston 2 such as in piston hole 11, limit
Part 3 is plugged on the limit hole 13 of cylinder 1, and locating part 3 is connected on the confined planes 21 of piston 2 at this time, so that piston 2 can be with
It reciprocatingly slides in piston hole 11, but limits piston 2 and rotation occurs.
In the present embodiment, piston 2 in the operating condition, moves reciprocatingly relative to locating part 3, thus to guarantee to live
Plug 2 will not generate collision with locating part 3 in the process of reciprocating, therefore full when piston 2 reciprocatingly slides in piston hole 11
Foot:
L1-L2≥S
Wherein, as shown in Figure 4, Figure 5, L1For length of the confined planes 21 on 2 axial direction of piston, L2It is locating part 3 along work
Fill in the length on 2 axial directions, in the present embodiment, L2The as diameter in 3 section of locating part, S are that piston is sliding in cylinder
Dynamic stroke.
Work as L1-L2When=S, when piston 2 slides into stroke end position in piston hole 11, the shape on the piston 2 of confined planes 21
At deep gouge side wall and locating part 3 be in just not in contact with extreme position, piston 2 will not occur with locating part 3 at this time
Collision.Work as L1-L2When > S, when piston 2 reciprocatingly slides in piston hole 11, the side for the deep gouge that confined planes 21 are formed on the piston 2
Wall can't contact always with locating part 3, therefore piston 2 will not collide with locating part 3, and compressor operating is more stable can
It leans on.
On this basis it is found that locating part 3 is in the length L on 2 axial direction of piston2It is longer, corresponding confined planes 21
Length L1Also it to design longer, therefore limit can be reduced by reducing length of the locating part 3 on 2 axial direction of piston
The length of the length in face 21, confined planes 21 reduces, and makes the seal distance between 1 inner wall of piston 2 and cylinder elongated accordingly, makes
It is more preferable to obtain sealing effect between 1 inner wall of piston 2 and cylinder.It, can be corresponding simultaneously under the premise of meeting minimum seal distance requirement
Design reduces the diameter of piston 2 and cylinder 1, reduces the mechanical consumption of compressor.
In the present embodiment, there are abutting relation, limit holes between guarantee locating part 3 and the confined planes 21 of piston 2
13 setting should meet:
Wherein, as shown in figure 5, D1For the diameter in 2 section of piston, D2Length for locating part 3 in piston 2 in the radial direction
Degree, in the present embodiment, as the diameter of section of locating part 3, L are centre distance of the locating part 3 in piston 2 in the radial direction
The length at 2 center of piston, when locating part 3 is abutted with confined planes 21, L=(D1+D2)/2-B, wherein B is confined planes 21 in work
The depth of the deep gouge formed on plug 2.
WhenWhen, locating part 3 and piston 2 be in not in contact with critical state, locating part 3 and piston 2 at this time
Between abutting relation is not present, therefore piston 2 can not be limited.WhenWhen, locating part 3 and confined planes at this time
21 abut, so that rotation occurs for limitation piston 2.
When meanwhile on this basis, to guarantee that locating part 3 is installed in limit hole 13, the bottom of locating part 3 is not hanging
(abutting with cylinder 1), should also meet when locating part 3 is abutted with confined planes 21:
WhenWhen, locating part 3 is mounted in limit hole 13, bottom end end face and the limit hole 13 of locating part 3
Bottom be in not in contact with critical state, at this time locating part 3 be cantilever design, need the upper end to locating part 3 that limit is fixed
Position.WhenWhen, a part of the bottom end end face of locating part 3 is connected to the bottom of limit hole 13, and locating part 3 is without cantilever
Is reduced by 3 stress of locating part, is reduced on cylinder 1 for the power indirectly-acting of locating part 3 when rotation trend occurs for structure, piston 2
To the intensity requirement of locating part.
As shown in fig. 6, in the present embodiment, limit hole 13 extends to the 1/2 of 1 axial height of cylinder along 1 end face of cylinder
At position, increase the length of locating part, so that locating part and confined planes contact area are bigger, the pressure of abutment portion is small, is not easy
Deformation.
Above-mentioned structure and principle to the piston limit structure in present embodiment is illustrated, it should be noted that
On the basis of the above embodiment, the utility model can also have other alternative embodiments.
Second of embodiment of the utility model piston limit structure is shown in Fig. 7, it is in the present embodiment, and upper
The difference for stating embodiment is that 3 quantity of locating part is set as two, and two corresponding limit holes are arranged on cylinder 1 accordingly
13, two locating parts 3 are separately positioned on the two sides for being located at 1 axis of cylinder on 1 upper surface of cylinder, and two locating parts 3 limit piston 2
Limit reliability is improved in position, implements parameter and limit principle is identical as above embodiment, present embodiment repeats no more.
Fig. 8 shows the third embodiment of the utility model piston limit structure, in the present embodiment, and above-mentioned
The difference of embodiment is that limit hole 13 is provided with the side of 1 lower end surface of cylinder, implements parameter and limit principle and above-mentioned reality
It is identical to apply mode.
Fig. 9 shows the 4th kind of embodiment of the utility model piston limit structure, in the present embodiment, limit hole
13 are set as two, and two limit holes 13 are provided with the two sides of the axis of 1 lower end surface of cylinder respectively, implement parameter and limit principle
It is identical as above embodiment.
Figure 10 shows the 5th kind of embodiment of the utility model piston limit structure, in the present embodiment, limit
Hole 13 is set as two, and two limit holes 13 are provided with respectively on 1 upper and lower end face of cylinder, and two limit holes 13 are located at gas
The two sides of 1 axis of cylinder, implement parameter and limit principle is identical as above embodiment.
Figure 11 shows the 6th kind of embodiment of the utility model piston limit structure, in the present embodiment, limit
Hole 13 run through cylinder 1 upper and lower end face, locating part 3 accordingly be set to limit hole 13 in, the axial length of locating part 3 be less than or
Axial length equal to cylinder 1 and the half greater than 1 axial length of cylinder implement parameter and limit principle and above embodiment
It is identical.
Figure 12 shows the 7th kind of embodiment of the utility model piston limit structure, in the present embodiment, limit
The upper and lower end face of cylinder 1 is run through in hole 13, and limit hole 13 is set as two, is located at the two sides of 1 axis of cylinder, locating part
3 are set in limit hole 13 accordingly, and the axial length of locating part 3 is less than or equal to the axial length of cylinder 1 and is greater than 1 axis of cylinder
To the half of length, implements parameter and limit principle is identical as above embodiment.
In other alternative embodiments, locating part 3 can also be any other shape being adapted for carrying out, such as vertical
Any shapes such as cube, plate, column, the utility model are without limitation.
In second aspect, the utility model additionally provides a kind of compressor, as shown in Figure 1, the compressor of the utility model
Including shaft 6, upper flange 4, lower flange 5, cylinder jacket 7 and above-mentioned piston limit structure, cylinder 1 is set in cylinder jacket 7,
Shaft 6 sequentially passes through upper flange 4, cylinder jacket 7 and lower flange 5.The compressor of the utility model is based on crosshead shoe principle,
As shown in Fig. 2, shaft 6 is abutted with 22 wall surface of axis hole of piston 2 thus with piston 2 and cylinder 1 in cylinder when compressor operating
Rotation in set 7, due to shaft 6 and 1 eccentric rotary of cylinder, piston 2 moves reciprocatingly relative to cylinder 1, thus at 2 both ends of piston
Cavity volume in compressed gas.Cooperated in the present invention by the confined planes 21 of setting locating part 3 and piston 2 and limited, had
Effect avoids the piston of compressor that rotation generation occurs and hits cylinder.
In the third aspect, the utility model additionally provides a kind of heat exchange equipment, which includes above-mentioned compressor
Or piston limit structure.Heat exchange equipment is air-conditioning or refrigerator.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among still in the protection scope of the application.
Claims (15)
1. a kind of piston limit structure characterized by comprising
Cylinder (1) has perpendicular to the cylinder (1) axis direction and runs through the piston hole (11) of the cylinder (1), the work
Consent (11) is being projected as circle in the through direction；
Piston (2) is shape-ordinatedly set in the piston hole (11) and can reciprocatingly slide in the piston hole (11), described
Offered on the side wall of piston (2) confined planes (21), the confined planes (21) the length along the piston (2) axial direction not through
The both ends of piston (2) side wall；And
Locating part (3) is offered on the cylinder (1) and is penetrated through from the cylinder (1) outer wall to the limit of the piston hole (11)
Hole (13), the locating part (3) are shape-ordinatedly installed in the limit hole (13), the locating part (3) and the limit
Face (21) is abutted to limit the piston (2) around own axes direction and rotate.
2. piston limit structure according to claim 1, which is characterized in that
The limit hole (13) penetrates through the axis to the piston hole (11) and with the cylinder (1) from the cylinder (1) end face
Direction is parallel.
3. piston limit structure according to claim 2, which is characterized in that
Position of the limit hole (13) on the cylinder (1) is opposite with 1/2 position of the piston hole (11) axial length
It answers.
4. piston limit structure according to claim 3, which is characterized in that
When the piston (2) reciprocatingly slides in the piston hole (11), meet:
L1-L2≥S
Wherein, L1For length of the confined planes (21) on the piston (2) axial direction, L2It is the locating part (3) along institute
The length on piston (2) axial direction is stated, S is the stroke that piston (2) are slided in the cylinder (1).
5. piston limit structure according to claim 3 or 4, which is characterized in that
The confined planes (21) are plane, are arranged at 1/2 position in the piston (2) radial height direction.
6. piston limit structure according to claim 5, which is characterized in that
When the locating part (3) abuts with the confined planes (21), meet:
Wherein, D1It is the piston (2) along the diameter of axial projection, D2It is radial in the piston (2) for the locating part (3)
Length on direction, L are the locating part (3) piston (2) center described in the piston (2) centre distance in the radial direction
Length.
7. piston limit structure according to claim 6, which is characterized in that
When the locating part (3) abuts with the confined planes (21), meet:
Wherein, D1It is the piston (2) along the diameter of axial projection, D2It is radial in the piston (2) for the locating part (3)
Length on direction, L are the locating part (3) piston (2) center described in the piston (2) centre distance in the radial direction
Length.
8. piston limit structure according to claim 7, which is characterized in that
The limit hole (13) extends at 1/2 position of the cylinder (1) axial height along the cylinder (1) end face.
9. piston limit structure according to claim 8, which is characterized in that
Limit hole (13) quantity is one, is arranged in the cylinder (1) upper surface or lower end surface.
10. piston limit structure according to claim 8, which is characterized in that
Limit hole (13) quantity is two, is arranged on the cylinder (1) upper surface/lower end surface and is located at the cylinder
(1) two sides or upper surface of axis are located at the side of the cylinder (1) axis and lower end surface is located at the cylinder (1) axis
Side.
11. piston limit structure according to claim 7, which is characterized in that
The limit hole (13) runs through the cylinder (1), and at least side being set in the cylinder (1) axis two sides.
12. according to claim 1 to 4,7 to 11 described in any item piston limit structures, which is characterized in that the locating part
It (3) is cylindrical position-limitting pin.
13. a kind of compressor characterized by comprising
Shaft (6)；
It is equipped with according to claim 1 to 12 described in any item piston limit structures, the cylinder (1) and the piston (2)
Along the perforative axis hole of the cylinder (1) axial direction, for installing the shaft (6)；And
Cylinder jacket (7), the cylinder (1) are set in the cylinder jacket (7) and are driven by the shaft (6) and rotated.
14. a kind of heat exchange equipment, which is characterized in that including the described in any item piston limit structures of claim 1 to 13.
15. heat exchange equipment according to claim 14, which is characterized in that the heat exchange equipment is air-conditioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822129873.9U CN209604247U (en) | 2018-12-18 | 2018-12-18 | Piston limit structure, compressor and heat exchange equipment |
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| CN109555690A (en) * | 2018-12-18 | 2019-04-02 | 珠海格力电器股份有限公司 | Piston limit structure, compressor and heat exchange equipment |
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| CN109555690A (en) * | 2018-12-18 | 2019-04-02 | 珠海格力电器股份有限公司 | Piston limit structure, compressor and heat exchange equipment |
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