CN1138068C

CN1138068C - Inclined plate compressor

Info

Publication number: CN1138068C
Application number: CNB01140857XA
Authority: CN
Inventors: 深沼哲彦; 明; 粥川浩明; 广; 川口真广
Original assignee: Toyoda Automatic Loom Works Ltd
Current assignee: Toyota Industries Corp
Priority date: 2000-09-18
Filing date: 2001-09-17
Publication date: 2004-02-11
Anticipated expiration: 2021-09-17
Also published as: US20020155004A1; JP2002089438A; EP1188923A2; CN1344863A; DE60103826T2; EP1188923A3; EP1188923B1; DE60103826D1; KR100441354B1; JP4292700B2; KR20020021979A; BR0104725A

Abstract

A swash plate type compressor that has a pair of shoes (18A, 18B, 18C, 18D, 18E) between a swash plate (15) and a piston (17). The motion of the swash plate is transmitted to the piston through the shoes. Each piston reciprocates according to the transmitted motion. A coating (32, 33) is applied to each surface of the swash plate to contact the corresponding shoe. The surface (H) of each coating (32, 33) is flat. Each shoe (18A to 18E) includes a substantially flat surface (34), which contacts the swash plate (15), and a semi-spherical portion (35), which is fitted to the piston (17). Each substantially flat surface (34) includes a main chamfered portion (342) near the periphery. The inclination angle (theta 1) of each main chamfered portion (342) with respect to the corresponding coating is a predetermined angle or less. Each coating contacts one of the substantially flat surfaces (34). The maximum distance (beta) between each main chamfered portion (342) and the corresponding coating is equal to or less than the thickness (D) of the corresponding coating (32, 33).

Description

A kind of oblique tray type compressor

Technical field

The present invention relates to a kind of oblique tray type compressor.Specifically, the present invention relates to a kind of oblique tray type compressor that has cated swash plate of top coated and a pair of lip block.Wherein, each lip block is between swash plate and piston.The coating coated is in zone that swash plate contacts with lip block.Each lip block all has the surface and the hemisphere portion that are essentially the plane.Each surface that is essentially the plane contacts with swash plate, and swash plate and rotating shaft form whole rotation.Each hemisphere portion is divided in one of two cavitys of respective pistons.The rotating force of swash plate passes to piston by lip block, comes driven plunger.

Background technique

Japan's special permission communique 61-1636 number and a day disclosure special permission communique disclose a kind of oblique tray type compressor for 11-193780 number, and in this compressor, piston is by reciprocating with the rotation of the integrally rotated swash plate of rotating shaft.Be provided with lip block between the preceding outer peripheral portion of swash plate and each piston and between the back outer peripheral portion of swash plate and each piston.Lip block is delivered to piston with the power of swash plate, and lip block slides along wobbler.Therefore, the lip block of being made by iron can wear and tear.So, need to improve the sliding capability of swash plate in lip block.

According to 61-1636 number illustrated compressor of Japan's special permission communique, arch upward outwardly in the plane of each hemisphere lip block.The radius of this arched part curvature is bigger.Near the periphery of each arcuate surface, be formed with first scarf and second scarf.The inclination angle of second scarf that inwardly contracts along first scarf footpath is less than the inclination angle of first scarf.First and second scarves aspirate oiling agent to the space between swash plate and each lip block from the periphery of swash plate.This has just improved the sliding capability of swash plate on lip block.

According to day disclosure special permission communique 11-193780 number, on swash plate, form and have the coating of high sliding capability, so that further improve the sliding capability of swash plate on lip block.The forward and backward outer peripheral portion that the coating coated contacts with lip block at swash plate.

According to day disclosure special permission communique 6-336978 number, in the cooling gas passage, filter is set.This filter is used for filtering foreign particle, as the wear particle of mill fragment or the compressor and the external refrigeration loop of parts.But this filter can only block greater than the foreign particle of a certain size so that avoid the obstruction of filter.Therefore, the foreign particle by filter can enter between swash plate and the lip block.So in the compressor that the coating swash plate is arranged, coating can be damaged to some extent according to entering the size of the foreign particle between swash plate and the lip block.In a single day coating is damaged, and its sliding capability will descend.

Summary of the invention

The technical problem that the present invention solves is to prevent that foreign particle from influencing or reducing the effectiveness of coating unfriendly.

For reaching the technical problem of above-mentioned solution, the present invention proposes a kind of oblique tray type compressor, and this compressor has at least one pair of to be in lip block between swash plate and the piston.This lip block that moves through of swash plate transmits this piston.Piston moves back and forth according to the motion that passes over.Two surperficial coated coatings that contact with lip block at swash plate.Each coating surface all is the plane.Each lip block all comprises the surface and the hemisphere portion that are essentially the plane.Each surface that is essentially the plane contacts with swash plate.Each hemisphere portion is divided in the piston.The surface that is essentially the plane of each lip block comprises a main chamfered portion.Main chamfered portion is positioned near the periphery on the surface that is essentially the plane.Each main chamfered portion is a predefined angle or littler than it with respect to the inclination angle [theta] 1 of respective coatings.Each coating contacts with a surface that is essentially the plane.Ultimate range β between each chamfered portion and its respective coatings is equal to or less than the thickness D of respective coatings.

Read following explanation in conjunction with the example of the principle of the invention being carried out graphic accompanying drawing, other aspects of the present invention and advantage will be more clear.

Description of drawings

Also with reference to following description of a preferred embodiment, the present invention may be better understood and purpose and advantage in conjunction with the accompanying drawings.In the accompanying drawings:

Fig. 1 (a) is the sectional view according to first embodiment's compressor; Fig. 1 (b) is the local amplification view of a pair of lip block and swash plate;

Fig. 2 is the local amplification view of a lip block and swash plate;

Fig. 3 has shown the diagrammatic profile of lip block;

Fig. 4 is second embodiment's a local amplification view;

Fig. 5 is the 3rd embodiment's a local amplification view;

Fig. 6 is the 4th embodiment's a local amplification view;

Embodiment

First embodiment according to the invention is illustrated to Fig. 3 below with reference to Fig. 1.

Fig. 1 has shown the internal structure of variable swash plate capacity compressors.Rotating shaft 13 is supported by fore shell 12 and cylinder body 11, and fore shell 12 has formed control pressure chamber 121.Rotating shaft 13 is driven by external drive source such as electric generator of vehicle.Rotor 14 is fixed in the rotating shaft 13.Swash plate 15 is connected in the rotating shaft 13 in the trunnion mode and is endwisely slipping.Support 151 and swash plate 15 are Unitarily molded and made by iron.A pair of guide finger 16 (one of them only is shown among Fig. 1) is fixed on the support 151.Each guide finger 16 is contained in the pilot hole 141 that is formed on rotor 14 accordingly slidably.Pilot hole 141 and guide finger 16 cooperatings.This just allows swash plate 15 integrally to rotate for 13 one-tenth with respect to rotating shaft 13 inclinations and with rotating shaft.The banking motion of swash plate 15 is by pilot hole 141, guide finger 16 and rotating shaft 13 guiding.

The inclination angle of swash plate 15 changes by the pressure of control pressure chamber 121 is controlled.When the pressure rising of control pressure chamber 121, the inclination angle of swash plate 15 reduces.When the pressure of control pressure chamber 121 reduces, the inclination angle of swash plate 15 increases.The refrigerant of control pressure chamber 121 flows to suction chamber 191 in the back cover 19 by the pressure relief channels (not shown).Refrigerant in the discharge chamber 192 is transported to control pressure chamber 121 by the pressure delivery pathway (not shown).Pressure delivery pathway is provided with displacement control valve 25.The flow velocity of 121 refrigerant is carried from discharge chamber 192 to control pressure chamber in control valve 25 control.When the flow velocity of 121 the refrigerant from discharge chamber 192 to control pressure chamber increased, the pressure in the control pressure chamber 121 raise.When the flow velocity of 121 the refrigerant from discharge chamber 192 to control pressure chamber reduced, the pressure in the control pressure chamber 121 reduced.Therefore, control valve 25 is being controlled the inclination angle of swash plate 15.

When swash plate 15 when 14 contact, the inclination angle maximum of swash plate 15.When the snap ring 24 of rotating shaft 13 contacts with swash plate 15, the inclination angle minimum of swash plate 15.

Be distributed with piston chamber 111 (only showing two among Fig. 1 (a)) around rotating shaft 13 in the cylinder body 11.Piston 17 is housed in the piston chamber 111.On each piston 17, be formed with holder 171, in 171, be formed with a pair of cavity 172,173.Shown in Fig. 1 (b), back cavity 172 is connected on the later half spherical lip block 18A, and preceding cavity 173 is connected on the preceding hemisphere lip block 18B.

Hemisphere lip block

18A, 18B can not remove from cavity 172,173 separately.

Lip block

18A, 18B are made by iron.

Swash plate 15 move through the linear reciprocating motion that

lip block

18A, 18B are transformed into piston 17.Therefore, each piston 17 is all reciprocating in piston chamber 111 separately.Back lip block 18A slides along the surface of contact 30 of swash plate 15.Preceding lip block 18B slides along the surface of contact 31 of swash plate 15.

When a piston 17 when the upper dead center of relevant piston chamber 111 moves to lower dead centre (the right from Fig. 1 (a) moves to the left side), the corresponding suction port 201 of refrigerant in the suction chamber 191 from first valve plate 20 flows to relevant piston chamber 111, and causes opening of corresponding suction valve 211 on second valve plate 21.

When a piston 17 when the lower dead centre of relevant piston chamber 111 moves to upper dead center (left side from Fig. 1 (a) moves to the right), corresponding floss hole 202 rows of the refrigerant of relevant piston chamber 111 from first valve plate 20 are to discharge chamber 192, and cause opening of corresponding escape cock 221 on the 3rd valve plate 22.The baffle plate 231 that forms on the 4th valve plate 23 is used for the aperture of limiting emission valve 221.

Discharge chamber 192 is linked to each other by external refrigerant loop 26 with suction chamber 191.Refrigerant in the discharge chamber 192 flows to suction chamber 191 by external refrigerant loop 26, and external refrigerant loop 26 comprises condenser 27, expansion valve 28 and vaporizer 29.

Shown in Fig. 1 (a), Fig. 1 (b), on the back outer peripheral portion 152 of swash plate 15 and preceding outer peripheral portion 153, be formed with coating 32,33 respectively.Back outer peripheral portion 152 and preceding outer peripheral portion 153 are contact area.Coating 32,33 respectively has two-layer.This is two-layer to comprise the metal layer 321,331 that forms respectively on back outer peripheral portion 152 and preceding outer peripheral portion 153, and the resin layer 322,332 that forms on metal layer 321,331 respectively.Therefore, the surface of resin layer 322,332 is the contact area that contacts with

lip block

18A, 18B respectively.

Metal layer 321,331 is respectively formed on the outer peripheral portion 152,153.Metal layer 321,331 is made by alumina-base material, and this alumina-base material mainly is made of the aluminium that comprises silicon.Metal layer 321,331 also can be made by copper-based material.Every layer of resin layer 322,332 is respectively formed on the corresponding metal layer 321,331.Every layer of resin layer 322,332 resin by polyamidoimide and so on constitute, and are distributed with the solid lubricant of molybdenum disulfide, graphite and so in polyamidoimide.Therefore, with swash plate 15 make material different be that coating 32,33 is made by much soft material.The thickness of metal layer 321,331 is about 60 to 70 microns.The thickness of resin layer 322,332 is about 10 to 20 microns.Therefore, the total thickness D of coating 32,33 is about 70 to 90 microns.

As shown in Figure 2,

lip block

18A, 18B have a surface 34 and a hemisphere portion 35 that is essentially the plane.The surface 34 that is essentially the plane contacts with swash plate 15.Hemisphere portion 35 is contained in the corresponding cavity 172,173 of associated piston 17.The surface 34 that is essentially the plane comprises arcuate surface 341 and main scarf 342.The radius of arcuate surface 341 curvatures is very big.Ring-type master's scarf 342 is formed on peripheral and the main scarf 342 and the arcuate surface 341 level and smooth combinations on the surface 34 that is essentially the plane.Inferior chamfered portion 36 forms around main scarf 342, and inferior chamfered portion 36 and the 342 level and smooth combinations of main scarf.The center of each main scarf 342 to the distance of respective coatings 32,33 from the surface 34 that is essentially the plane accordingly radially outward direction increases gradually.Each surface 34 that is essentially the plane is arcuate surface, and the summit P of this arcuate surface is positioned at the center on the surface 34 that is essentially the plane accordingly.

Fig. 3 shows the diagrammatic profile of a lip block.In Fig. 3,, be essentially the surface 34 on plane and the section of time chamfered portion 36 and be exaggerated along direction perpendicular to surface 34 for the ease of diagram.Point P represents the center on surface 34.The plane that line H representative contacts with the center point P on surface 34.Lip block master scarf 342 is about 2 to 7 ° with respect to the mean value of first inclination angle [theta] 1 of respective planes H.Lip block time chamfered portion 36 is about 40 ° with respect to the mean value of second inclination angle [theta] 2 of respective planes H.Inclination angle [theta] 1, θ 2 are respectively along the extend radially line segment of main scarf 342 and inferior chamfered portion 36 inclination with respect to respective planes H.Plane H is about 2 to 7 microns to the ultimate range α of arcuate surface 341.Plane H is about 10 microns to the ultimate range β of main scarf 342.Plane H arrives the thickness D of the ultimate range γ of time chamfered portion 36 greater than coating 32,33.

When swash plate 15 rotations, oiling agent on the surface of contact 30,31 of swash plate 15 is inhaled into the space between time chamfered portion 36 and the surface of contact 30,31, and then be inhaled between main scarf 342 and the surface of contact 30,31 the space and 341 and surface of contact 30,31 between the space.

First embodiment has following advantage:

(1) main scarf 342 is about 2 to 7 ° with respect to the mean value of first inclination angle [theta] 1 of respective planes H.Each plane H contacts with the center point P on corresponding surface 34.When foreign particle entered between main scarf 342 that minimum angle-of-incidence is θ 1 and the swash plate 15, respective coatings 32,33 can be damaged.But, the ultimate range β between each main scarf 342 and the corresponding contact face 30,31 is about 10 microns.Therefore, diameter can not enter space between main scarf 342 and the corresponding contact face 30,31 greater than the foreign particle of the thickness D (being about 70 to 90 microns) of coating 32,33.

In addition, diameter can enter time tiltedly space between the part 36 and corresponding contact face 30,31 greater than the foreign particle of the thickness D of coating 32,33.But, the oblique part 36 of each time is about 40 ° with respect to the mean value of the inclination angle [theta] 2 of respective planes H, and therefore, foreign particle can not enter the space between time oblique part 36 and the corresponding contact face 30,31.If diameter enters space between main scarf 342 and the swash plate less than the foreign particle of the thickness D of coating 32,33, foreign particle is submerged in the coating 32,33 fully.Therefore, when foreign particle entered space between each lip block and the swash plate, this foreign particle can not roll yet.

Therefore, diameter can not enter space between swash plate 15 and lip block 18A, the 18B greater than the foreign particle that can easily damage coating 32,33 of thickness D.This has just prevented the damage of foreign particle to coating 32,33.

In test, aluminum particulate and iron particle are put into control pressure chamber 121.Allow compressor operation one hour then, reexamine the degree of injury of particle resin layer 322,333.The gross weight of foreign particle is 12 milligrams.The ratio of the weight of aluminum particulate and iron particle is 2: 1.The maximum diameter of foreign particle is 100 microns.As a result, not wearing and tearing of resin layer 322,333.

(2) on the surface of contact 30,31 of the swash plate 15 that slides of

lip block

18A, 18B oiling agent is arranged in the above.Time tiltedly part 36 with second bigger inclination angle [theta] 2 effectively oiling agent is drawn into 34 and corresponding contact face 30,31 between the space.

(3) in first embodiment, the mean value of second inclination angle [theta] 2 of inferior oblique part 36 is about 40 °.But, if each second inclination angle [theta] 2 all greater than 20 °, diameter can enter the tiltedly space between the part 36 of surface of contact 30,31 and corresponding time greater than the foreign particle of coating thickness D.But, foreign particle can not enter surface of contact 30,31 and the corresponding inferior tiltedly space between the part 36.That is to say that when diameter enters surface of contact 30,31 and corresponding time tiltedly during the space between the part 36 greater than the foreign particle of coating thickness D, the possibility that coating 32,33 is damaged is very little.Second inclination angle [theta] 2 of inferior oblique part 36 is greater than 20 °.When second inclination angle [theta] 2 of inferior oblique part 36 is equal to or less than 20 ° greater than first inclination angle of 20 ° and main scarf 342,, the ultimate range β between main scarf 342 and the corresponding contact face 30,31 must be less than the thickness D of coating 32,33.This has just prevented the damage of foreign particle to coating 32,33.

(4) slide over each other with same material and compare, different materials slides over each other and has the lower possibility of biting.Swash plate 15 is made by iron, and the metal layer of coating 32,33 321,331 is made by alumina-base material.Alumina-base material is suitable to prevent biting of swash plate 15 and

lip block

18A, 18B.

(5) there is oiling agent extremely important between respective surfaces 34 centers of the surface of contact 30,31 of swash plate 15 and each

lip block

18A, 18B for the working life that prolongs coating 32,33.In the space between respective surfaces 34 centers of the surface of contact 30,31 that oiling agent is sucked swash plate and each

lip block

18A, 18B, each arcuate surface 341 plays important effect.

(6) inferior oblique part 36 has been eliminated the lip block 18A that contacts with swash plate 15, the sharp edge of 18B.

Below with reference to Fig. 4 second embodiment is illustrated.For indicating with same or analogous label with the same or analogous parts of first embodiment.

Arcuate surface 341 and main scarf 342C smooth connection.Main scarf 342C and time tiltedly part 36C smooth connection.The main scarf 342C of lip block 18C is about 10 ° with respect to the mean value of first inclination angle [theta] 1 of respective planes H.The oblique part 36C of inferior oblique cutting part gradation of lip block 18C identical with respect among the mean value of second inclination angle [theta] 2 of respective planes H and first embodiment.Each main scarf 342C is about 70 to 80 microns to the ultimate range β of corresponding plane H.Identical among the thickness of coating 32,33 and first embodiment.

Second embodiment has the advantage identical with first embodiment.

Fig. 5 shows the 3rd embodiment.For indicating with same or analogous label with the same or analogous parts of first embodiment.

The main scarf 342D smooth connection of arcuate surface 341 and lip block 18D.Main scarf 342D and time tiltedly part 36C smooth connection.The main scarf 342D of lip block 18D is about 10 ° with respect to the mean value of first inclination angle [theta] 1 of respective planes H.Inferior chamfered portion 36D is about 60 ° with respect to the mean value of second inclination angle [theta] 2 of respective planes H.Each main scarf 342D is about 70 to 80 microns to the ultimate range β of corresponding plane H.Identical among the thickness of coating 32,33 and first embodiment.

The 3rd embodiment has the advantage identical with first embodiment.

Fig. 6 shows the 4th embodiment.For indicating with same or analogous label with the same or analogous parts of first embodiment.

The main scarf 342E smooth connection of arcuate surface 341 and lip block 18E.Main scarf 342E and time tiltedly part 36E smooth connection.Main scarf 342E is formed by the chamfered portion 342E1 of outer arch and the chamfered portion 342E2 of interior arch.Chamfered portion 342E1 and 342E2 smooth connection.The main scarf 342E of lip block 18E is about 10 ° with respect to the mean value of first inclination angle [theta] 1 of respective planes H.Inferior chamfered portion 36E is about 40 ° with respect to the mean value of second inclination angle [theta] 2 of respective planes H.Each main scarf 342E is about 70 to 80 microns to the ultimate range β of corresponding plane H.Identical among the thickness of coating 32,33 and first embodiment.

The 4th embodiment has the advantage identical with first embodiment.The present invention also comprises more following embodiments.

(1) the present invention can be used for the compressor that a swash plate coated has the resin layer that contains solid lubricant.

(2) the present invention can be used for the compressor that a swash plate coated has metal layer.

(3), allow main chamfered portion directly link to each other with hemisphere portion at second, third, among the 4th embodiment, can remove time chamfered portion.

For the professional person in those these fields, under the prerequisite that does not break away from the spirit and scope of the invention, the present invention can also be many other concrete form embody.Should be noted that especially the present invention can above-mentioned form embody.Therefore, should think for example and embodiment all be illustrative and not restrictive, and the present invention is not restricted to the details that goes out given herein, can be revised it in the scope of the scope of subsidiary claim and equivalent thereof.

Claims

1. oblique tray type compressor, wherein, be provided with a pair of lip block (18A between swash plate (15) and the piston (17), 18B, 18C, 18D, 18E), the described lip block that moves through of described swash plate is passed to described piston, described piston moves back and forth according to the motion that passes over, it is characterized in that, two surperficial coated coatings (32 that described swash plate contacts with described lip block, 33), each described coating (32,33) surface (H) all is the plane, each described lip block (18A, 18B, 18C, 18D, 18E) all comprise a surface (34) and a hemisphere portion (35) that is essentially the plane, each described surface (34) that is essentially the plane contacts with described swash plate (15), each described hemisphere portion (35) all is contained in the described piston (17), the described surface (34) that is essentially the plane of each described lip block comprises a main chamfered portion (342), described main chamfered portion (342) is positioned near the periphery on the described surface (34) that is essentially the plane, each main chamfered portion (342) has the inclination angle (θ 1) with respect to respective coatings, one in each described coating and the described surface (34) that is essentially the plane contacts, and the ultimate range (β) between each described main chamfered portion (342) and its respective coatings is equal to or less than its corresponding described coating (32,33) thickness (D).

2. compressor according to claim 1, it is characterized in that, each described lip block comprises an inferior chamfered portion (36) around corresponding described main chamfered portion (342), described chamfered portion (36) and described main chamfered portion (342) are joined, and described chamfered portion (36) is with respect to the inclination angle (θ 1) greater than main chamfered portion (342), the inclination angle (θ 2) of respective coatings.

3. compressor according to claim 1 and 2, it is characterized in that, each described coating (32,33) is by metal layer (321,331) and resin layer (322,332) form, described resin layer (322,332) comprise solid lubricant, described resin layer (322,332) is gone up at described metal layer (321,331) and is formed.

4. compressor according to claim 3 is characterized in that, described swash plate (15) is made by iron, and described metal layer (321,331) is made by aluminium base or copper-based material.

5. compressor according to claim 1 and 2 is characterized in that, the direction with radial outward increases the distance between each main chamfered portion (342) and its respective coatings gradually from the center on the corresponding described surface (34) that is essentially the plane.

6. compressor according to claim 1 and 2 is characterized in that, each described surface (34) that is essentially the plane is arcuate surface, and its summit is at the described center that is essentially the surface (34) on plane.

7. compressor according to claim 3 is characterized in that, described metal layer (321,331) is by making than the soft material of described swash plate material.