CN102575659A - Shoe for swash plate compressor - Google Patents
Shoe for swash plate compressor Download PDFInfo
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- CN102575659A CN102575659A CN2011800026260A CN201180002626A CN102575659A CN 102575659 A CN102575659 A CN 102575659A CN 2011800026260 A CN2011800026260 A CN 2011800026260A CN 201180002626 A CN201180002626 A CN 201180002626A CN 102575659 A CN102575659 A CN 102575659A
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- shoes
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- swash plate
- spherical
- piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
- F04B27/0878—Pistons
- F04B27/0886—Piston shoes
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- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
A shoe for swash plate compressor is provided to prevent a flat surface of a shoe and a swash plate, and a spherical surface of the shoe and a piston from seizing up, and to make the shoe for a swash plate compressor smaller while maintaining high durability. A shoe for a swash plate compressor (30) is disposed between a swash plate (5) that is disposed at an incline to a rotating shaft (2) and that rotates with the rotating shaft (2), and a piston that reciprocates in the direction in which the rotating shaft extends according to the rotation of the swash plate (5). The shoe for a swash plate compressor (30) is provided with a flat surface (32) that comes into contact with the swash plate (5), and a spherical surface (31) that comes into contact with a semi-spherical sliding surface (13) formed on the piston. Through-holes (35), which link the flat surface (32) and the spherical surface (31), are disposed between the flat surface (32) and the spherical surface (31). The through-holes (35) comprise a first cylindrical through-hole (36) comprising a first diameter d1, and a second cylindrical through-hole (37) comprising a second diameter d2 which is larger than the first diameter d1.
Description
Technical field
The present invention relates to a kind of shoes that is used for oblique tray type compressor (shoe) that prevents to take place between swash plate (wobbler) and the piston seizure.
Background technique
As shown in Figure 5, conventional oblique tray type compressor comprises: housing 20; Be arranged in the running shaft 2 in the housing 20, this running shaft 2 is configured to be rotated; Be arranged on the swash plate 5 of the periphery of running shaft 2 obliquely, this swash plate 5 is configured to rotate jointly with running shaft 2; Admit the piston 7 of the outer periphery of swash plate 5, this piston 7 is configured to by the rotation of swash plate 5 and to-and-fro motion on the running shaft direction; And be arranged in the shoes 90 between swash plate 5 and the piston 7.Shoes 90 has the tabular surface 92 that contacts with swash plate 5, and the spherical 91 that contacts slidably with the hemisphere slip surface 13 of piston 7.
Piston 7 through making oblique tray type compressor is (in Fig. 5 by the direction shown in the arrow M) to-and-fro motion on the running shaft direction, and freezing refrigeration agent (for example chloro-fluoro-hydrocarbons) is inhaled in the oblique tray type compressor and therefrom and discharges.Freezing refrigeration agent contains a spot of lubricant mist.Lubricant oil is provided to the space between swash plate 5 and the shoes 90, and the space between shoes 90 and the piston 7.
Because swash plate 5 applies big pressure to shoes 90 when sliding, therefore between swash plate 5 and shoes 90, produced big frictional force, make and between swash plate 5 and shoes 90, seizure may take place.
Even when the space that supplies lubrication oil between shoes 90 and the piston 7, because the frictional force that between the hemisphere slip surface 13 of shoes 90 and piston 7, produces still seizure might take place between the hemisphere slip surface 13 of shoes 90 and piston 7.
In order to tackle this problem; Known a kind of shoes, the spherical of said shoes is provided with spiral chute, and known a kind of shoes; The spherical of said shoes has slightly smooth top, in case seizure (for example seeing patent documentation 1 and 2) takes place between on-slip pin and the hemisphere slip surface.In addition, known a kind of shoes, the tabular surface of said shoes have circular recess or the circular groove in its middle body formation, to prevent that seizure (for example part patent documentation 3 and 4) takes place between swash plate and the shoes.
But, the shoes in being used for aforementioned conventional oblique tray type compressor because the oil lubrication effect is local, between swash plate and the shoes and/or the lubricants capacity between shoes and piston not enough, so the oil lubrication effect has the possibility of inefficacy.Thus, seizure possibly take place between swash plate and the shoes and/or between shoes and piston, seizure possibly take place.
In addition, because this shoes itself has big weight, therefore on piston and swash plate, applied big load, this may cause wearing and tearing.Therefore, in order to reduce the weight of shoes, known a kind of hollow shoes that is provided with tabular surface and spherical, said tabular surface has substantially invariable thickness, and said spherical has the thickness (seeing patent documentation 5) that reduces gradually to the top.
But, shown in patent documentation 5, when changing hollow shape so that during constant thickness, the intensity of shoes has reduced.This durability deficiency of having dwindled the shoes of size, and be difficult to this shoes of actual use.In addition, because the degree that weight reduces is about 10% at the most, so the effect that weight reduces is also insufficient.
Patent documentation 1:JP11-50959A.
Patent documentation 2:JP63-007288U.
Patent documentation 3: japanese patent laid-open publication gazette 03-12671 number.
Patent documentation 4: japanese patent laid-open publication gazette 04-77155 number.
Patent documentation 5:JP2002-39058A.
Summary of the invention
In view of the foregoing produced the present invention.The purpose of this invention is to provide a kind of shoes that is used for oblique tray type compressor, this shoes can prevent tabular surface and the spherical of seizure between the swash plate (calcination) and shoes and the seizure between the piston of shoes.Shoes can be reduced size, keeps excellent durability simultaneously.
The shoes that is used for oblique tray type compressor according to the present invention is a kind of shoes that is used for oblique tray type compressor that is arranged between swash plate and the piston; Said swash plate is arranged on the running shaft obliquely; And be configured to rotate jointly with running shaft; Said piston structure becomes to-and-fro motion on the direction of extending the place by the rotation of swash plate and at running shaft, and the shoes that is used for oblique tray type compressor comprises:
The tabular surface that contacts with swash plate; And
The spherical that contacts with the hemisphere slip surface that on piston, forms;
Wherein:
The through hole that tabular surface and spherical are interconnected forms between tabular surface and spherical; And
Through hole is made up of columniform first through hole and columniform second through hole, and said first through hole has first radius, and said second through hole has second radius greater than first radius.
At the shoes that is used for oblique tray type compressor according to the present invention, first through hole can form in a side of spherical, thereby extends to spherical, and second through hole can form in a side of tabular surface, thereby extends to tabular surface.
The shoes that is used for oblique tray type compressor according to the present invention also can be included in the truncated cone shape transitional pore that forms between first through hole and second through hole, and this transitional pore interconnects first through hole and second through hole.
At the shoes that is used for oblique tray type compressor according to the present invention, the inner circumference edge portion in abutting connection with through hole of tabular surface can tilt to spherical, and the inner circumference edge portion in abutting connection with through hole of spherical can tilt to tabular surface.
At the shoes that is used for oblique tray type compressor according to the present invention, spherical can have the surface of contact that under static state, contacts with the slip surface of piston, and the non-contact face that under static state, does not contact with slip surface.
At the shoes that is used for oblique tray type compressor according to the present invention, tabular surface can have the surface of contact that under static state, contacts with swash plate, and the area of the surface of contact of the area of the surface of contact of spherical and tabular surface can be equal to each other basically.
According to the present invention, the cylindrical hole that tabular surface and spherical are interconnected is provided.Through hole is made up of cylindrical first through hole with first diameter and the cylindrical hole that has greater than second diameter of first diameter.Therefore, the tabular surface and the spherical of shoes can be oil be supplied to, tabular surface and the spherical of seizure between the swash plate (calcination) and shoes and the seizure between the piston of shoes can be prevented thus.In addition, shoes can reduced size design, the excellent durability of maintenance simultaneously.
Description of drawings
Fig. 1 (a) sectional view (b) illustrates the operation of oblique tray type compressor according to an embodiment of the invention.
The cross-sectional side of Fig. 2 illustrates the shoes that is used for oblique tray type compressor according to an embodiment of the invention.
The cross-sectional side of Fig. 3 illustrates the shoes that is used for oblique tray type compressor according to an optional example of the embodiment of the invention.
The view of Fig. 4 is used to explain an example of the shoes that is used for oblique tray type compressor according to an embodiment of the invention.
The sectional view of Fig. 5 illustrates conventional oblique tray type compressor.
Embodiment
Below will be with reference to description of drawings according to oblique tray type compressor of the present invention and the embodiment who is used for the shoes of oblique tray type compressor.Fig. 1 (a) (b) illustrates embodiments of the invention to the view of Fig. 4.Can be used for air compressor of automobile for example or the like according to this embodiment's the shoes that is used for oblique tray type compressor 30.
Shown in Fig. 1 (a) and Fig. 1 (b), oblique tray type compressor comprises: housing 20; Be arranged in the running shaft 2 in the housing 20, this running shaft 2 is configured to (in Fig. 1 (a) and Fig. 1 (b) by the direction shown in the arrow C on) and is rotated; Be arranged on the swash plate 5 of the outer periphery of running shaft 2 obliquely, this swash plate 5 is configured to rotate jointly with running shaft 2; Admit the piston 7 of the outer periphery of swash plate 5, this piston 7 is configured to extend to-and-fro motion on the direction that belongs to by the rotation of swash plate 5 at running shaft 2; And be arranged in the shoes that is used for oblique tray type compressor 30 (also only being called " shoes 30 " hereinafter) between swash plate 5 and the piston 7.
Shown in Fig. 1 (a) and Fig. 1 (b), housing 20 has a pair of cylinder block 1a and 1b, be connected to protecgulum 9 and the bonnet 11 that is connected to the other end of cylinder block 1b of the end of cylinder block 1a, and said a pair of cylinder block covers piston 7 from the periphery of piston 7.The first valve plate 8a is arranged between cylinder block 1a and the protecgulum 9, and the second valve plate 8b is arranged between cylinder block 1b and the bonnet 11.This is interconnected by the bolt (not shown) cylinder block 1a and 1b.
Shown in Fig. 1 (a) and Fig. 1 (b); The first valve plate 8a is provided with the first expulsion valve 21a and the first suction valve 22a; Said first expulsion valve is connected to the discharge tube (not shown) so that discharge freezing refrigeration agent (for example chloro-fluoro-hydrocarbons); Said first suction valve is connected to the suction pipe (not shown), and freezing refrigeration agent is supplied to said suction pipe.The second valve plate 8b is provided with the second expulsion valve 21b and the second suction valve 22b; Said second expulsion valve is connected to the discharge tube (not shown) so that discharge freezing refrigeration agent; Said second suction valve is connected to the suction pipe (not shown), and freezing refrigeration agent is supplied to said suction pipe.Freezing refrigeration agent contains the less amount of lubrication oil mist.Lubricant oil is provided to the space between swash plate 5 and the shoes 30, and the space between shoes 30 and the piston 7.
Shown in Fig. 1 (a) and Fig. 1 (b), running shaft 2 rotatably remains on cylinder block 1a and the 1b through bearing 3 and 4.Running shaft 2 is connected to the driver element (not shown) of rotary driving axle 2.
Shown in Fig. 1 (a) and Fig. 1 (b), a pair of cylinder block 1a and 1b, the first valve plate 8a, the second valve plate 8b and running shaft 2 have constituted pressing chamber 6, and said pressing chamber holds piston 7 therein, the to-and-fro motion on the running shaft direction of said piston.
As shown in Figure 2, the shoes 30 that is arranged between swash plate 5 and the piston 7 has tabular surface 32 that contacts with swash plate 5 and the spherical 31 that contacts slidably with the hemisphere slip surface 13 that on piston, forms.
As shown in Figure 2, what between the tabular surface 32 of shoes 30 and spherical 31, form is the through hole 35 that tabular surface 32 and spherical 31 are interconnected.Through hole 35 is made up of with cylindrical second through hole 37 cylindrical first through hole 36, and said first through hole has first diameter d
1, said second through hole has greater than first diameter d
1Second diameter d
2
As shown in Figure 2, first through hole 36 forms in a side of spherical 31, thereby extends to spherical 31, and second through hole 37 forms in a side of tabular surface 32, thereby extends to tabular surface 32.Between first through hole 36 and second through hole 37, be formed with the transitional pore 38 of truncated cone shape, this transitional pore interconnects first through hole 36 and second through hole 37.
In the present embodiment, transitional pore 38 forms between first through hole 36 and second through hole 37, and this is as demonstration, and the present invention is not limited thereto.As shown in Figure 3, first through hole 36 and second through hole 37 can interconnect, and do not have transitional pore 38.
As shown in Figure 2, thus the excircle of the tabular surface 32 of shoes 30 part is cut sth. askew to tilt to spherical 31.Inclination angle theta with respect to the plane parallel with tabular surface 32 is about 10 °.
As shown in Figure 2, thus the inner circumference edge portion in abutting connection with through hole 35 of tabular surface 32 is cut sth. askew to tilt to spherical 31.Similarly, thus the inner circumference edge portion in abutting connection with through hole 35 of spherical 31 cut sth. askew to tilt to tabular surface 32.
Shown in Fig. 1 (a) and Fig. 1 (b), piston 7 has hemisphere slip surface 13.The spherical 31 of shoes 30 remains within the hemisphere slip surface 13 of piston 7 slidably.
As shown in Figure 2, the spherical 31 of shoes 30 has surface of contact 31a and non-contact face 31b.Do not receive static following time of driving when oblique tray type compressor is in, surface of contact 31a contacts with the hemisphere slip surface 13 of piston 7.Do not receive static following time of driving when oblique tray type compressor is in, non-contact face 31b does not contact with the hemisphere slip surface 13 of piston 7.In the present embodiment, the diameter D between the starting point of surface of contact 31a
1Be about 6.00 millimeters, shoes 30 begins at said starting point place to contact with the hemisphere slip surface 13 of piston, and the diameter D between the destination node of surface of contact 31a
2Be about 13.00 millimeters, shoes 30 finishes at said destination node place and the contacting of the hemisphere slip surface 13 of piston.
In the present embodiment, the surface of contact 31a of spherical 31 is positioned on the imaginary sphere.The radius R of this imagination sphere
1Be about 9.00 millimeters.The surface that non-contact face 31b has is basically parallel to the imaginary sphere that surface of contact 31a is positioned at, and recessed from this imagination sphere.
As shown in Figure 2, tabular surface 32 has surface of contact 32a and non-contact face 32b.Do not receive static following time of driving when oblique tray type compressor is in, surface of contact 32a contacts with swash plate 5.Do not receive static following time of driving when oblique tray type compressor is in, non-contact face 32b does not contact with swash plate 5.
At this, preferably, the area of the area of the surface of contact 31a of spherical 31 and the surface of contact 32a of tabular surface 32 is equal to each other basically.When the area of the surface of contact 32a of the area of the surface of contact 31a of spherical 31 and tabular surface 32 is equal to each other basically, can make be applied to the pressure of the per unit area between hemisphere slip surface 13 and the spherical 31 and be applied to tabular surface 32 and swash plate 5 between the pressure of per unit area be equal to each other basically.Thus, shoes 30 can slide well-balancedly.
For the area of the surface of contact 32a of the area of the surface of contact 31a that makes spherical 31 and tabular surface 32 is equal to each other basically, adjusted the diameter D between the destination node of surface of contact 31a
2And/or adjusted the diameter d of through hole 35
1And d
2
The diameter d of the surface of contact 32a of the tabular surface 32 of shoes 30
3Be about 13.00 millimeters, the height H of shoes 30 is about 5.85 millimeters, and the diameter d of shoes 30
4Be about 15.00 millimeters (see figure 2)s.
Preferably, the diameter d of first through hole 36 of through hole 35
1Radius R for imaginary sphere
1About 30% to about 45%.Preferably, the diameter d of second through hole 37 of through hole 35
2Radius R for imaginary sphere
1About 45% to about 95%.Preferably, the height h of second through hole 37 is the radius R of imaginary sphere
1About 20% to about 30%.More specifically, the diameter d of first through hole 36
1Be for example 4.0 millimeters, the diameter d of second through hole 37
2Be for example 7.0 millimeters, and the height h of second through hole 37 is for example 2.5 millimeters.Compare with the conventional shoes 30 that does not have through hole 35, because these sizes, the weight of shoes 30 can reduce 30%.
Although described the size of shoes 30, the numerical value of preceding text is merely exemplary, and the present invention is not limited thereto.
Next, with the operation of present embodiment of explanation structure as indicated above.
At first, be connected to the driver element (not shown) rotary driving axle 2 such as motor (in Fig. 1 (a) by the direction shown in the arrow C on) rotation of running shaft 2.Because running shaft 2 is driven rotation, therefore make swash plate 5 rotations (seeing Fig. 1 (a)) that are arranged on obliquely on the running shaft 2.At this moment, swash plate 5 rotation and contact with the tabular surface 32 of (seeing Fig. 1 (a)) shoes 30 within the hemisphere slip surface 13 that is positioned at piston 7.
Because the rotation of swash plate 5, make piston 7 in the axial direction of rotation (in Fig. 1 (a) by arrow M
1Shown direction) goes up straight line and move (seeing Fig. 1 (a)).At this moment, the spherical 31 of the shoes 30 within the hemisphere slip surface 13 of piston 7 within the hemisphere slip surface 13 of piston 7 in Fig. 1 (a) by arrow C
1Slide on the shown direction (seeing Fig. 1 (a)).
At piston 7 during straight line motion on the running shaft direction; When at by compression the pressure of freezing refrigeration agent between the piston 7 and the second valve plate 8b during greater than the pressure of the freezing refrigeration agent in the discharge tube (not shown) that is being connected to the second valve plate 8b, the freezing refrigeration agents in the pressing chamber 6 are drained into discharge tube (seeing Fig. 1 (a)) through the second expulsion valve 21b.In addition, the freezing refrigeration agent that contains lubricant mist is inhaled into pressing chamber 6 (seeing Fig. 1 (a)) from the suction pipe (not shown) through the first suction valve 22a on the end that is arranged in pressing chamber 6.At this moment, the first expulsion valve 21a that is arranged in the first valve plate 8a closes (seeing Fig. 1 (a)) with the second suction valve 22b that is arranged in the second valve plate 8b.
Subsequently, be connected to further rotary driving axle 2 rotations of the driver element of running shaft 2 (in Fig. 1 (b) by the direction shown in the arrow C on), thereby make the swash plate 5 that is arranged on obliquely on the running shaft 2 be further rotated (seeing Fig. 1 (b)).At this moment, swash plate 5 rotation and contact (seeing Fig. 1 (b)) with the tabular surface 32 of shoes 30 within the hemisphere slip surface 13a that is positioned at piston 7.
Because swash plate 5 is further rotated, piston 7 straight line on another running shaft direction moves, promptly on the direction of aforementioned direction (in Fig. 1 (b) by arrow M
2On the shown direction) (seeing Fig. 1 (b)).At this moment, the spherical 31 that is positioned at the shoes 30 within the hemisphere slip surface 13 of piston 7 within the hemisphere slip surface 13 of piston 7 by arrow C
2Slide on the shown direction (seeing Fig. 1 (b)).
At piston 7 during straight line motion on another running shaft direction; When at by compression the pressure of freezing refrigeration agent between the piston 7 and the first valve plate 8a during greater than the pressure of the freezing refrigeration agent in the discharge tube that is being connected to the first valve plate 8a, the freezing refrigeration agents in the pressing chamber 6 are drained into discharge tube (seeing Fig. 1 (b)) through the first expulsion valve 21a.In addition, the freezing refrigeration agent that contains lubricant mist is inhaled into pressing chamber 6 (seeing Fig. 1 (b)) from suction pipe through the second suction valve 22b in the other end that is arranged in pressing chamber 6.At this moment, the second expulsion valve 21b that is arranged in the second valve plate 8b closes (seeing Fig. 1 (b)) with the first suction valve 22a that is arranged in the first valve plate 8a.
After this, repeat above-mentioned steps.Of preamble, thus because driver element makes running shaft 2 rotations make swash plate 5 rotations, can make piston 7 to-and-fro motion.Thus, oblique tray type compressor can compress freezing refrigeration agent and will discharge through the freezing refrigeration agent of compression in pressing chamber 6, also can freezing refrigeration agent be sucked in the pressing chamber 6 from suction pipe.
Make the 7 reciprocating whiles of piston, the cylindrical hole 35 of lubricant oil through tabular surface 32 and spherical 31 are interconnected makes lubricant oil be supplied to tabular surface 32 and spherical 31 both (see figure 2)s up hill and dale thus.The frictional force that thus, can be reduced in the frictional force that produces between spherical 31 and the hemisphere slip surface 13 of shoes 30 and between the tabular surface 32 of shoes 30 and swash plate 5, produce.Thus, the seizure between spherical 31 and the hemisphere slip surface 13 can be prevented, and the seizure between tabular surface 32 and the swash plate 5 can be prevented.
Especially, when the oblique tray type compressor of routine brought into operation, because freezing refrigeration agent is at first mobile, inner being made except that grease of oblique tray type compressor can not provide the oil lubrication effect.Therefore, between shoes 30 and the swash plate 5 seizure possibly take place.On the other hand, according to present embodiment, owing to be provided with through hole 35, the oil that therefore uses before is still in through hole 35.That is to say,, therefore can prevent the seizure between shoes 30 and the swash plate 5 reliably because oil can remain in the through hole 35.
In addition, according to present embodiment,, therefore can be easy to oil in reserve owing between first through hole 36 and second through hole 37, be provided with the transitional pore 38 of truncated cone shape.Thus, can prevent seizure between shoes 30 and the swash plate 5 more reliably.
In addition, according to present embodiment, has second diameter d owing to be provided with
2 Cylindrical hole 37, therefore said second diameter is relatively large diameter, can keep more a large amount of residual oils.Thus, can prevent seizure between shoes 30 and the swash plate 5 more reliably.
In addition; As shown in Figure 2, in the present embodiment, because first through hole 36 and second through hole 37 have the shape of cylinder; And first through hole 36 is connected mutually with the transitional pore 38 of second through hole 37 through truncated cone shape, so lubricant oil can be flowing between tabular surface 32 and the spherical 31 glibly.Thus, can be reduced in frictional force that produces between spherical 31 and the hemisphere slip surface 13 and the frictional force that between tabular surface 32 and swash plate 5, produces more reliably.As a result, can prevent the seizure between spherical 31 and the hemisphere slip surface 13 more reliably, and the seizure between tabular surface 32 and the swash plate 5.Simultaneously, in the embodiment shown in the JP2002-39058A, be different from present embodiment, because lubricant oil collects in the cavity, lubricant oil can't flow between tabular surface 32 and spherical 31 glibly.Therefore, compare with the invention disclosed in the JP2002-39058A, embodiments of the invention are favourable in this.
In addition, as shown in Figure 2, in the present embodiment,, the inner circumference edge portion in abutting connection with through hole 35 of tabular surface 32 tilts because cutting sth. askew to spherical 31, and therefore the lubricant oil on tabular surface 32 can be introduced into through hole 35 glibly.Similarly, the inner circumference edge portion in abutting connection with through hole 35 of spherical 31 cuts sth. askew to tabular surface 32 and, and therefore the lubricant oil on spherical 31 can be introduced into through hole 35 glibly.By these structures; According to the present invention; Because lubricant oil can move more glibly, therefore can be reduced in frictional force that produces between spherical 31 and the hemisphere slip surface 13 and the frictional force that between tabular surface 32 and swash plate 5, produces more reliably between tabular surface 32 and spherical 31.As a result, can prevent the seizure between spherical 31 and the hemisphere slip surface 13 more reliably, and the seizure between tabular surface 32 and the swash plate 5.
In addition, as shown in Figure 2, in the present embodiment,, therefore can reduce the weight of shoes 30 owing to be provided with through hole 35.More specifically, compare with the conventional shoes that does not have through hole 35, the weight of shoes 30 can reduce 20% to 30%.Thus, the rotation of swash plate 5 is quickened, can be increased the speed of oblique tray type compressor thus.When being formed with shoes 30, when said shoes had the shape shown in the JP2002-39058A, the shoes 30 of minification design can't have enough durability, and this shoes 30 can't use in reality.On the other hand, according to present embodiment, has first diameter d as less relatively diameter
1First through hole 36 be arranged in a side of the less spherical of sectional area 31, and have second diameter d as relatively large diameter
2Second through hole 37 be arranged in a side of the bigger tabular surface of sectional area 32.In addition, the transitional pore 38 of truncated cone shape forms between first through hole 36 and second through hole 37.Therefore, because shoes 30 can the reduced size design keep its a certain or bigger thickness simultaneously, so shoes 30 can the design of reduced size ground keep excellent durability simultaneously.
In addition, as shown in Figure 2, in the present embodiment, spherical 31 has non-contact face 31b, and said non-contact face does not contact with hemisphere slip surface 13 under static state.Thus, can make the surface of contact that between the hemisphere slip surface 13 of shoes 30 and piston 7, limits less, can be reduced in the frictional force that produces between shoes 30 and the hemisphere slip surface 13 thus.As a result, according to present embodiment, shoes 30 is slided more glibly.
In addition; Of preamble; When the area of the surface of contact 32a of the area of the surface of contact 31a of spherical 31 and tabular surface 32 is equal to each other basically; Can make the pressure that is applied to the per unit area between hemisphere slip surface 13 and the spherical 31, and the pressure that is applied to the per unit area between tabular surface 32 and the swash plate 5 is equal to each other basically.Thus, shoes 30 can slide well-balancedly.
(example)
Next, the friction and wear between explanation shoes 30 and the swash plate 5 is tested the result of (pin disc type (pin-on-disk) friction and wear test).
Testing apparatus shown in Figure 4 has been described.This testing apparatus comprises: only be rotated and not axially movable running shaft 61; Arrange with running shaft 61 common (one), only move axially and the pressuring shaft 62 that is not rotated; Be used to oppress the shoes casting die 68 of shoes 30; And swash plate fixed component 64, swash plate 5 is fixed on the said parts.Three shoes casting dies 68 are arranged to the circumferential interval for equating to each other.Shoes casting die 68 rotates with running shaft 61 jointly.By the rotatable collar (not shown) swash plate fixed component 64 is not rotated.
Be arranged between swash plate fixed component 64 and the pressuring shaft 62 is the steel ball 63 that serves as pivot.In addition, be used to guarantee that safe protection bucket 65 is arranged in the periphery outside of shoes casting die 68 and swash plate fixed component 64.
Be used to make the motor (not shown) of running shaft 61 rotations to be connected to running shaft 61.When the rotating torques value surpassed setting value, motor stopped.What be connected to pressuring shaft 62 is the pressurization device (not shown), and oil pressure generator for example is so that to pressuring shaft 62 load pressurizations.The power that is applied to the torsional direction of pressuring shaft 62 is detected as the rotating torques value.
Through shoes 30 is rotated with predetermined rotating speed, through in Fig. 4, upwards swash plate 5 pressurizations being urged to the slip surface 13 of swash plate 5 on the tabular surface 32 of shoes 30 on the direction, between shoes 30 and swash plate 5, produced frictional force simultaneously.More specifically, upwards on the direction swash plate 5 is pressurizeed in Fig. 4 with the power of 50 kilogram forces, double centner power, 150 kilogram forces and 200 kilogram forces, and the rotating speed of running shaft 61 remains on 1000 rev/mins.Because three shoes casting dies 68 are positioned on the circumferential interval that equates to each other, and have loaded three shoes 30, the load that therefore is applied to each shoes 30 is respectively 1/3rd, i.e. 50/3 kilogram force, 100/3 kilogram force, 150/3 kilogram force and 200/3 kilogram force.In the oblique tray type compressor of routine, the load that is applied to shoes 30 is generally about 50 kilogram forces.
Value corresponding to the power of aforementioned frictional force is detected as the rotating torques value.The listed table 1 of hereinafter illustrates these values.The rotating torques value is corresponding to the performance of shoes 30 with respect to swash plate 5.When rotating torques value hour, rare seizure, the i.e. excellent performance of shoes 30.
As comparative sample, adopted the conventional shoes 30 that does not have through hole 35.
Table 1
Can understand from the table 1 of preceding text, in the low-load region of 50 kilogram forces and double centner power, not have significant difference between comparative sample shoes and the sample shoes.On the other hand, in the high-load region of 150 kilogram forces and 200 kilogram forces, the rotating torques value of sample shoes 30 is less than the rotating torques value of comparative sample shoes.Can understand the excellent performance of sample shoes friction resistant and wearing and tearing thus.Especially, after the load that applies 200 kilogram forces was through 300 seconds, the rotating torques value of comparative sample shoes was 2.5, and the rotating torques value of sample shoes is 0.65.That is to say, the rotating torques value of comparative sample shoes be 3.8 times of the rotating torques value of the sample shoes (=2.5/0.65).Can understand thus, can expect that sample shoes 30 provides anti-seizure effect, this effect is about four times of the anti-seizure effect that provided by comparative sample shoes.
Reference numerals list
La, the 1b cylinder block
2 running shafts
5 swash plates
7 pistons
8a first valve plate
8b second valve plate
20 housings
30 shoes
31 sphericals
32 tabular surfaces
35 through holes
36 first through holes
37 second through holes
38 transitional pores
Claims (6)
1. shoes that is used for oblique tray type compressor; Said shoes is arranged between swash plate and the piston; Said swash plate is arranged on the running shaft obliquely; And be configured to rotate jointly with running shaft, said piston structure becomes by the rotation of said swash plate and to-and-fro motion on the direction that said running shaft extends, and the said shoes that is used for oblique tray type compressor comprises:
The tabular surface that contacts with said swash plate; And
The spherical that contacts with the hemisphere slip surface that on said piston, forms;
Wherein:
The through hole that said tabular surface and said spherical are interconnected forms between this tabular surface and this spherical; And
Said through hole is made up of columniform first through hole and columniform second through hole, and said first through hole has first radius, and said second through hole has second radius greater than this first radius.
2. the shoes that is used for oblique tray type compressor according to claim 1, wherein,
Said first through hole forms in a side of said spherical, thereby extends to this spherical, and
Said second through hole forms in a side of said tabular surface, thereby extends to this tabular surface.
3. the shoes that is used for oblique tray type compressor according to claim 1 and 2 also comprises:
The truncated cone shape transitional pore that between said first through hole and said second through hole, forms, this transitional pore interconnect this first through hole and this second through hole.
4. according to each described shoes that is used for oblique tray type compressor of claim 1 to 3, wherein,
The inner circumference edge portion of the said through hole of adjacency of said tabular surface tilts to said spherical, and
The inner circumference edge portion of the said through hole of adjacency of said spherical tilts to said tabular surface.
5. according to each described shoes that is used for oblique tray type compressor of claim 1 to 4, wherein,
Said spherical has the surface of contact that under static state, contacts with the said slip surface of said piston, and the non-contact face that under static state, does not contact with this slip surface.
6. the shoes that is used for oblique tray type compressor according to claim 5, wherein,
Said tabular surface has the surface of contact that under static state, contacts with said swash plate, and
The area of the area of the said surface of contact of said spherical and the said surface of contact of said tabular surface is equal to each other basically.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010204662A JP5518650B2 (en) | 2010-09-13 | 2010-09-13 | Shoe for swash plate compressor |
| JP204662/2010 | 2010-09-13 | ||
| PCT/JP2011/070176 WO2012036013A1 (en) | 2010-09-13 | 2011-09-05 | Shoe for swash plate compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102575659A true CN102575659A (en) | 2012-07-11 |
Family
ID=45831480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800026260A Pending CN102575659A (en) | 2010-09-13 | 2011-09-05 | Shoe for swash plate compressor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20130167713A1 (en) |
| JP (1) | JP5518650B2 (en) |
| CN (1) | CN102575659A (en) |
| WO (1) | WO2012036013A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574611A (en) * | 2014-08-22 | 2017-04-19 | Ntn株式会社 | Method for manufacturing hemispherical shoe for swash plate compressor and mold for injection molding same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002039058A (en) * | 2000-07-27 | 2002-02-06 | Naito Tekkosho:Kk | Shoe for swash type compressor |
| CN1338028A (en) * | 1999-11-26 | 2002-02-27 | 大丰工业株式会社 | Sliding device |
| JP2004084574A (en) * | 2002-08-27 | 2004-03-18 | Taiho Kogyo Co Ltd | Slipper |
| JP2005090385A (en) * | 2003-09-18 | 2005-04-07 | Zexel Valeo Climate Control Corp | Shoe for compressor and its manufacturing method |
| CN2874054Y (en) * | 2005-11-24 | 2007-02-28 | 沈一中 | slide shoe for compressor |
| US20070277671A1 (en) * | 2006-05-31 | 2007-12-06 | Ggb, Inc. | Plastic Shoes for Compressors |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD226333A1 (en) * | 1984-06-01 | 1985-08-21 | Karl Marx Stadt Ind Werke | PISTON SHOE COMBINATION |
| JPS6257782U (en) * | 1985-09-30 | 1987-04-10 | ||
| US4617856A (en) * | 1986-01-13 | 1986-10-21 | General Motors Corporation | Swash plate compressor having integral shoe and ball |
| JP3878256B2 (en) * | 1996-10-21 | 2007-02-07 | サンデン株式会社 | Single swash plate compressor |
| JP3285080B2 (en) * | 1997-08-07 | 2002-05-27 | 大豊工業株式会社 | Shoe and its manufacturing method |
| JP2001263225A (en) * | 2000-03-17 | 2001-09-26 | Toyota Autom Loom Works Ltd | Method of manufacturing shoe for swash plate type compressor |
| JP2010037991A (en) * | 2008-08-01 | 2010-02-18 | Taiho Kogyo Co Ltd | Shoe |
-
2010
- 2010-09-13 JP JP2010204662A patent/JP5518650B2/en not_active Expired - Fee Related
-
2011
- 2011-09-05 US US13/375,246 patent/US20130167713A1/en not_active Abandoned
- 2011-09-05 WO PCT/JP2011/070176 patent/WO2012036013A1/en active Application Filing
- 2011-09-05 CN CN2011800026260A patent/CN102575659A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338028A (en) * | 1999-11-26 | 2002-02-27 | 大丰工业株式会社 | Sliding device |
| JP2002039058A (en) * | 2000-07-27 | 2002-02-06 | Naito Tekkosho:Kk | Shoe for swash type compressor |
| JP2004084574A (en) * | 2002-08-27 | 2004-03-18 | Taiho Kogyo Co Ltd | Slipper |
| JP2005090385A (en) * | 2003-09-18 | 2005-04-07 | Zexel Valeo Climate Control Corp | Shoe for compressor and its manufacturing method |
| CN2874054Y (en) * | 2005-11-24 | 2007-02-28 | 沈一中 | slide shoe for compressor |
| US20070277671A1 (en) * | 2006-05-31 | 2007-12-06 | Ggb, Inc. | Plastic Shoes for Compressors |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574611A (en) * | 2014-08-22 | 2017-04-19 | Ntn株式会社 | Method for manufacturing hemispherical shoe for swash plate compressor and mold for injection molding same |
| CN106574611B (en) * | 2014-08-22 | 2019-04-30 | Ntn株式会社 | The manufacturing method and injection moulding mold of oblique tray type compressor hemisphere crawler shoe |
| US10670074B2 (en) | 2014-08-22 | 2020-06-02 | Ntn Corporation | Method for producing semispherical shoe for swash plate compressor and injection molding die |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5518650B2 (en) | 2014-06-11 |
| JP2012057601A (en) | 2012-03-22 |
| WO2012036013A1 (en) | 2012-03-22 |
| US20130167713A1 (en) | 2013-07-04 |
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Application publication date: 20120711 |