CN204436789U - Rotary compressor - Google Patents

Abstract

The utility model discloses a kind of rotary compressor, comprise: housing and compressing mechanism, in housing, there is oil sump, compressing mechanism comprises two supporting members, cylinder, piston, slide plate and bent axle, two supporting members are located at the axial two ends of cylinder to limit compression chamber between cylinder, piston sleeve to be located on bent axle and to be positioned at compression chamber, cylinder is formed with the vane slot be communicated with compression chamber, slide plate is located in vane slot movingly, and the periphery wall of the tip of slide plate and piston only supports so that compression chamber is separated into air aspiration cavity and exhaust cavity, at least one in two supporting members is formed with oilhole, lubricant oil in oil sump is suitable for being entered in exhaust cavity by oilhole to lubricate the tip of slide plate, wherein when the length that slide plate stretches in compression chamber is the longest, the tip of slide plate is covered to small part oilhole.According to rotary compressor of the present utility model, by offering oilhole on the bearer, thus improving the lubrication circumstances of slide plate tip, improve reliability.

Description

Rotary compressor

Technical field

The utility model relates to compressor apparatus field, especially relates to a kind of rotary compressor.

Background technique

Point out in correlation technique, the reliability of rotary compressor is the key factor affecting life of product length, good lubrication in rotary compressor between kinematic pair is the prerequisite ensureing rotary compressor reliability, but, in the compressing mechanism of rotary compressor, kinematic pair between slide plate and piston is often in boundary lubrication condition, and the tip of slide plate is easy to wear, thus causes the hydraulic performance decline of rotary compressor, even lost efficacy.

Model utility content

The utility model is intended at least to solve one of technical problem existed in prior art.For this reason, the utility model is to propose a kind of rotary compressor, and described rotary compressor improves the lubricating condition of slide plate tip.

According to rotary compressor of the present utility model, comprising: housing, in described housing, there is oil sump, and compressing mechanism, described compressing mechanism comprises two supporting members, cylinder, piston, slide plate and bent axle, described two supporting members are located at the axial two ends of described cylinder to limit compression chamber between described cylinder, the lower end of described bent axle is through described two supporting members and described cylinder, described piston sleeve to be located on described bent axle and to be positioned at described compression chamber, described cylinder is formed with the vane slot be communicated with described compression chamber, described slide plate is located in described vane slot movingly, and the periphery wall of the tip of described slide plate and described piston only supports so that described compression chamber is separated into air aspiration cavity and exhaust cavity, at least one in described two supporting members is formed with oilhole, lubricant oil in described oil sump is suitable for being entered in described exhaust cavity by described oilhole to lubricate the tip of described slide plate, wherein when the length that described slide plate stretches in described compression chamber is the longest, the described tip of described slide plate is covered to oilhole described in small part.

According to rotary compressor of the present utility model, by offering oilhole on the bearer, provide lubricant oil with the tip to slide plate, thus improve the lubrication circumstances of slide plate tip, reduce the wearing and tearing of slide plate tip, improve the functional reliability of rotary compressor.

Particularly, when the length that described slide plate stretches in described compression chamber is the longest, perpendicular to described cylinder axis to horizontal plane on, the connecting with the described periphery wall of described piston away from one end of described vane slot or covered by described piston of described oilhole.

Alternatively, described oilhole along described cylinder radial direction extend and parallel with described slide plate.

Further, described oilhole away from the side sidewall of described air aspiration cavity and the side sidewall away from described air aspiration cavity of described slide plate concordant.

Particularly, described oilhole be parallel to the length L on described vane motion direction meet: wherein, 90 °≤θ≤270 °, wherein, e is the offset of described bent axle, and r is the outer edge radius of described piston.

Particularly, described oilhole is meeting perpendicular to the width D on described vane motion direction: wherein, D _slidingfor the thickness of described slide plate.

Further, described rotary compressor comprises further: oil pipe, and it is described at least one that described oil pipe is located in described two supporting members, and one end of described oil pipe is communicated with described oilhole, and the other end of described oil pipe immerses in described oil sump.

Particularly, the angle α between the center line of described oil pipe and the central axis of described cylinder meets: 0≤α <90 °

Further, described cylinder has the suction port be communicated with described air aspiration cavity, axially relative at described cylinder of the described the other end of wherein said oil pipe and the central axis of described suction port.

Alternatively, described oilhole is circular port, slotted eye, long-round-shape hole or polygonal hole.

Alternatively, described cylinder is one, and described two supporting members are main bearing and supplementary bearing.

Alternatively, described cylinder is multiple, is provided with dividing plate between two often adjacent described cylinders, and at least one among described two supporting members is described dividing plate.

Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the generalized section of the rotary compressor according to the utility model embodiment;

Fig. 2 is the plan view of the rotary compressor shown in Fig. 1;

Fig. 3 is the sectional drawing along A-A line in Fig. 2;

Fig. 4 is the operating diagram of the piston shown in Fig. 3;

Fig. 5 is the plan view of the supplementary bearing shown in Fig. 3;

Fig. 6 is the sectional drawing along B-B line in Fig. 5;

Fig. 7 is the working state schematic representation of the compressing mechanism shown in Fig. 3;

Fig. 8 is a working state schematic representation of the compressing mechanism shown in Fig. 7;

Fig. 9 is the C portion enlarged view that Fig. 8 centre circle shows;

Figure 10 is another working state schematic representation of the compressing mechanism shown in Fig. 7;

Figure 11 is the D portion enlarged view that Figure 10 centre circle shows;

Figure 12 is another working state schematic representation of the compressing mechanism shown in Fig. 7;

Figure 13 is the E portion enlarged view that Figure 12 centre circle shows.

Reference character:

100: rotary compressor;

1: housing;

2: motor; 21: rotor; 22: stator;

3: compressing mechanism; 311: main bearing; 312: supplementary bearing; 313: oilhole; 314: oil pipe;

32: cylinder; 321: compression chamber; 3211: air aspiration cavity; 3212: exhaust cavity;

33: piston; 34: slide plate;

35: bent axle; 351: eccentric part;

200: liquid-storage container; 201: suction conduit assembly; 2011: conduit; 2012: conical pipe.

Embodiment

Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.

Below with reference to Fig. 1-Figure 13, the rotary compressor 100 according to the utility model embodiment is described.Wherein, rotary compressor 100 can be vertical compressor or horizontal compressor, is only described for vertical compressor for rotary compressor 100 below.

As shown in Figure 1, according to the rotary compressor 100 of the utility model embodiment, comprising: housing 1, compressing mechanism 3 and motor 2 etc.

With reference to Fig. 1, housing 1 can be formed as columnar seal container substantially, motor 2 and compressing mechanism 3 are all located in housing 1, wherein, motor 2 can comprise rotor 21 and stator 22, compressing mechanism 3 can comprise bent axle 35 and compression assembly, motor 2 and compression assembly are in the axially spaced apart setting of housing 1, one end and the rotor 21 of bent axle 35 are fixed, the other end of bent axle 35 runs through compression assembly, like this, when motor 2 works, can rotate that the refrigerant in compression assembly is compressed by rotor 21 driving crank 35.

Particularly, compression assembly can comprise two supporting members (such as main bearing 311, supplementary bearing 312 or dividing plate) hereinafter described and cylinder 32, two supporting members are located at the axial two ends of cylinder 32 respectively to limit compression chamber 321 between cylinder 32.Here, it should be noted that, rotary compressor 100 can be single cylinder compressor or multicylinder compressor, when rotary compressor 100 is single cylinder compressor (as shown in Figure 1), cylinder 32 is one, and two supporting members at the axial two ends of cylinder 32 are respectively main bearing 311 and supplementary bearing 312.When rotary compressor 100 is (scheming not shown) during multicylinder compressor, cylinder 32 is multiple, and the spaced apart in the axial direction setting of multiple cylinder 32, be provided with dividing plate between two often adjacent cylinders 32, at least one among two supporting members is dividing plate.

Particularly, when multicylinder compressor is duplex cylinder compressor, cylinder 32 is two, dividing plate is provided with between two cylinders 32, the other end of one of them cylinder 32 is provided with main bearing 311, now two supporting members at these axial two ends of cylinder 32 are respectively main bearing 311 and dividing plate, and the other end of another cylinder 32 is provided with supplementary bearing 312, and now two supporting members at these axial two ends of cylinder 32 are respectively supplementary bearing 312 and dividing plate.

Further, when multicylinder compressor is three cylinder compressor, cylinder 32 is three, three spaced apart in the axial direction settings of cylinder 32, dividing plate is provided with between two often adjacent cylinders 32, one end away from middle cylinders 32 of two cylinders 32 at two ends is respectively equipped with main bearing 311 and supplementary bearing 312, wherein two supporting members at the axial two ends of the cylinder 32 of contiguous main bearing 311 setting are respectively main bearing 311 and dividing plate, two supporting members at the axial two ends of the cylinder 32 that contiguous supplementary bearing 312 is arranged are respectively supplementary bearing 312 and dividing plate, two supporting members at the axial two ends of middle cylinders 32 are dividing plate.

Here, it should be noted that, the rest may be inferred for the structure of all the other multicylinder compressors, therefore repeats no longer one by one.Only be described for single cylinder compressor for rotary compressor 100 below, after the technological scheme of those skilled in the art below having read, be obviously appreciated that rotary compressor 100 is the technological scheme of multicylinder compressor.

Particularly, as shown in Figure 1-Figure 3, the compression assembly of single cylinder compressor can comprise main bearing 311, supplementary bearing 312, cylinder 32, piston 33 and slide plate 34, main bearing 311 is located at cylinder 32 top axially, supplementary bearing 312 is located at cylinder 32 bottom axially, main bearing 311, compression chamber 321 is limited between cylinder 32 and supplementary bearing 312, the lower end of bent axle 35 is in turn through main bearing 311, cylinder 32 and supplementary bearing 312, the eccentric part 351 of bent axle 35 is engaged in compression chamber 321, piston 33 to be set on eccentric part 351 and to be positioned at compression chamber 321, when in the process that bent axle 35 rotates, piston 33 can roll along the inner circle wall of compression chamber 321.

With reference to Fig. 3, and composition graphs 8-Figure 13, cylinder 32 is formed with the vane slot be communicated with compression chamber 321, vane slot extends along the radial direction of cylinder 32, slide plate 34 is located in vane slot movingly, the rear end of slide plate 34 can be connected with sliding blade spring, sliding blade spring moves towards the central direction of compression chamber 321 often to promote slide plate 34, to make the tip of slide plate 34 only support with the periphery wall of piston 33 all the time, thus coordinate that compression chamber 321 can be separated into volume be periodically variable air aspiration cavity 3211 and exhaust cavity 3212 by slide plate 34 and piston 33.

With reference to Fig. 3, bottom in housing 1 has oil sump, at least one in main bearing 311 and supplementary bearing 312 is formed with oilhole 313, that is, main bearing 311 can be formed with oilhole 313, supplementary bearing 312 also can be formed with oilhole 313, main bearing 311 and supplementary bearing 312 can also all be provided with oilhole 313 simultaneously, the two ends of oilhole 313 are communicated with oil sump with exhaust cavity 3212 respectively, and thus, the lubricant oil in oil sump can be entered in exhaust cavity 3212 by oilhole 313.

Particularly, with reference to Fig. 7, (the position that the slide plate 34b such as shown in Fig. 7 arrives when the length that slide plate 34 stretches in compression chamber 321 is the longest, distance now between piston 33b and vane slot is maximum), that is, when slide plate 34 moves to the bottom dead center position shown in Figure 10, the tip of slide plate 34 is covered to small part oilhole 313, thus lubricant oil can lubricate the tip of slide plate 34.Here, it should be noted that, " bottom dead center position " is well known to those skilled in the art, here no longer describe in detail, in addition, top dead center position refers to slide plate 34 and stretches into the minimum position of length in compression chamber 321, and the position that such as, slide plate 34a shown in Fig. 7 arrives, the distance now between piston 33a and vane slot is minimum.In addition, be understandable that, when rotary compressor 100 is multicylinder compressor, oilhole 313 can be formed on dividing plate, thinks that slide plate 34 tip in corresponding compression chamber 321 provides lubricant oil.

With reference to Fig. 1, when rotary compressor 100 is high back pressure compressor, air aspiration cavity 3211 can be communicated with by airtight suction conduit assembly 201 (such as conduit 2011 and conical pipe 2012) with liquid-storage container 200, thus the low pressure refrigerant in liquid-storage container 200 can feed in air aspiration cavity 3211 by airtight suction conduit assembly 201, exhaust cavity 3212 is communicated with housing 1 inside, thus the high pressure refrigerant after compression can be discharged into housing 1 inside by exhaust cavity 3212, thus, the pressure of housing 1 inside is greater than in exhaust cavity 3212 chamber pressure before not starting to discharge refrigerant.Like this, when in the process that rotary compressor 100 works, utilize in housing 1 inside and exhaust cavity 3212 chamber pressure before not starting to discharge refrigerant poor, coordinate to come the openings of sizes of regulating and controlling nozzle opening 313 by slide plate 34 and the motion of piston 33 simultaneously, thus reach the object controlling fuel injection quantity and injection time, achieve exhaust cavity 3212 to break away the oil jet lubrication of sheet 34 and piston 33, improve the lubricating status that slide plate 34 tip contacts with rolling piston 33 outer rim, and then improve the reliability of rotary compressor 100.

In addition, when rotary compressor 100 is low back pressure compressor, in the suitable time, the lubricant oil in oil sump can be introduced oilhole 313 according to flow accurately by arranging pump oil assembly and regulating controller, to lubricate the tip of slide plate 34, wherein pump oil assembly and regulating controller are well known to those skilled in the art, such as pump oil assembly can comprise oil pipe, oil pump and solenoid valve etc., and regulating controller can be controller etc.

According to the rotary compressor 100 of the utility model embodiment, by offering oilhole 313 on the bearer, to provide lubricant oil to the tip of slide plate 34, thus improve the lubrication circumstances of slide plate 34 tip, reduce the wearing and tearing of slide plate 34 tip, improve the functional reliability of rotary compressor 100.In brief, adopt the mode of oilhole 313 oil spout to improve the lubricating condition of slide plate 34 tip according to the rotary compressor 100 of the utility model embodiment, thus make rotary compressor 100 have simple and reasonable, reliability is high, the life-span is long, fabricating cost is low, flexible and convenient operation, the advantage such as applied widely.

And, after the first end in contact of lubricant oil and slide plate 34, a stable oil film can be maintained between piston 33 outer rim and the tip of slide plate 34, thus further improve the boundary lubrication condition of slide plate 34 and piston 33.In addition, when spraying into lubricant oil in exhaust cavity 3212, the temperature of compression chamber 321 can be reduced, thus reduce the lubricating oil viscosity of compression work, raising compression chamber 321, reduce leakage, improve cold.

Alternatively, oilhole 313 can be circular port, slotted eye, long-round-shape hole or polygonal hole etc.That is, in the plane perpendicular to cylinder 32 axis, the sectional shape of oilhole 313 is circular, ellipse, long-round-shape or polygonal.Such as in the example of hgure 5, oilhole 313 can be long-round-shape hole.

Oilhole 313 along cylinder 32 radial direction extend and parallel with the moving direction of slide plate 34.Such as in the example in figure 7, oilhole 313 can be formed as long-round-shape hole, and in the plane perpendicular to cylinder 32 axis, the length direction of oilhole 313 is parallel to the moving direction of slide plate 34.Thus, effectively can reduce the size of oilhole 313, improve the specific aim of oilhole 313 oil spout, guarantee that the lubricant oil that oilhole 313 spray only lubricates near slide plate 34 tip, thus avoid too much lubricant oil and enter in exhaust cavity 3212 problem causing and tell oil mass rising.

Further, oilhole 313 away from the side sidewall of air aspiration cavity 3211 and the side sidewall away from air aspiration cavity 3211 of slide plate 34 concordant.Such as in the example of Figure 10 and Figure 11, the right side wall of oilhole 313 is concordant with the right side wall of slide plate 34, thus the size of oilhole 313 can be reduced further, improve the specific aim of oilhole 313 oil spout, guarantee that the lubricant oil that oilhole 313 sprays only lubricates near slide plate 34 tip, reduce further and tell oil mass.Certainly, the utility model is not limited thereto, the side sidewall away from air aspiration cavity 3211 of oilhole 313 can also be positioned at the side of the contiguous air aspiration cavity 3211 of the side sidewall away from air aspiration cavity 3211 of slide plate 34, and the right side wall of such as, oilhole 313 shown in Fig. 7 can be positioned at the left side of the right side wall of slide plate 34.

Particularly, with reference to Fig. 4 and Fig. 5, the span that oilhole 313 is being parallel to the length L in slide plate 34 moving direction meets: and, 90 °≤θ≤270 °, wherein, θ is the angle between the line of bent axle 35 central axis and eccentric part 351 central axis and vane slot center line, e is the offset of bent axle 35, i.e. the length of the line of bent axle 35 central axis and eccentric part 351 central axis, and r is the outer edge radius of piston 33.Here, it should be noted that, length L is definite value, arbitrary suitable value in this span can be selected to process oilhole 313 on the bearer according to actual requirement.

Particularly, with reference to Fig. 4 and Fig. 7, oilhole 313 meets in the span perpendicular to the width D in slide plate 34 moving direction: wherein, D _slidingfor the thickness (the slide plate 34a such as shown in 7 or slide plate 34b thickness in the lateral direction) of slide plate 34.Such as in the example in figure 7, when oilhole 313 be formed as long-round-shape hole and oilhole 313 along cylinder 32 radial direction extend and parallel with slide plate 34 time, width D is the tip diameter of oilhole 313.Here, it should be noted that, width D is definite value, arbitrary suitable value in this span can be selected to process oilhole 313 on the bearer according to actual requirement.

Alternatively, when the length that slide plate 34 stretches in compression chamber 321 is the longest, on the horizontal plane perpendicular to cylinder 32 axis, one end away from vane slot of oilhole 313 is covered by piston 33.Such as in the example of Figure 10, when slide plate 34 moves to bottom dead center position, on the horizontal plane perpendicular to cylinder 32 axis, one end away from vane slot of oilhole 313 is covered by piston 33.

Or alternatively, when the length that slide plate 34 stretches in compression chamber 321 is the longest, on the horizontal plane perpendicular to cylinder 32 axis, one end away from vane slot of oilhole 313 connects with the periphery wall of piston 33, such as when oilhole 313 is formed as long-round-shape hole and oilhole 313 along cylinder 32 radial direction extend and parallel with slide plate 34 time, one end away from vane slot of oilhole 313 can be tangent with the periphery wall of piston 33.Thus, the size of oilhole 313 can be reduced further, improve the specific aim of oilhole 313 oil spout, guarantee that the lubricant oil that oilhole 313 sprays only lubricates near slide plate 34 tip, reduce further and tell oil mass.

In an embodiment of the present utility model, rotary compressor 100 comprises further: oil pipe 314, oil pipe 314 be located at there is oilhole 313 supporting member on, and one end of oil pipe 314 is communicated with oilhole 313, and the other end of oil pipe 314 immerses in oil sump.With reference to Fig. 6, supplementary bearing 312 is formed with oilhole 313, oilhole 313 can run through towards the direction away from described cylinder 32 from a side end face of the contiguous cylinder 32 of supplementary bearing 312, supplementary bearing 312 is formed with oil duct further, one end of oil duct is communicated with oilhole 313, the other end of oil duct runs through supplementary bearing 312, one end of oil pipe 314 can be stretched in oil duct to be connected with oilhole 313 from supplementary bearing 312, the other end of oil pipe 314 is immersed in oil sump to be communicated with lubricant oil, thus the lubricant oil in oil sump can import in oilhole 313 by oil pipe 314, lubricate for the tip of slide plate 34.Thus, by arranging the simple oil pipe 314 of structure, effectively can simplify the structure of rotary compressor 100, that reduces oil spout effect realizes difficulty, improves applicability and the replicability of rotary compressor 100.In addition, oil pipe 314 pairs of lubricant oil can play certain throttling action, thus avoid and that cause oil spout too much problem excessive due to pressure reduction.

Particularly, meet with reference to Fig. 1 and Fig. 6, the angle α between the center line of oil pipe 314 and the central axis of cylinder 32: 0≤α <90 °.Such as, during angle α=0 ° between the center line and the central axis of cylinder 32 of oil pipe 314, oil pipe 314 can stretch in oil sump vertically, now, it is shorter that the length of oil pipe 314 can be arranged, with the bottom avoiding the lower end of oil pipe 314 to stretch into oil sump, avoid the impurity etc. of oil sump bottom precipitation to enter oil pipe 314 and block oil pipe 314, when the length of oil pipe 314 is longer, oil pipe 314 can be arranged to the angle 0 ° of < α <90 ° between the center line of oil pipe 314 and the central axis of cylinder 32, such as, angle between the center line of oil pipe 314 and the central axis of cylinder 32 can be 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 ° or 80 ° etc., thus the lower end of oil pipe 314 can be avoided further to stretch into the bottom of oil sump, prevent the impurity etc. of oil sump bottom precipitation from entering oil pipe 314.

Particularly, with reference to Fig. 1, cylinder 32 has the suction port be communicated with air aspiration cavity 3211, one end for the suction conduit assembly 201 introduced in air aspiration cavity 3211 by refrigerant in liquid-storage container 200 mentioned above can be stretched into and be engaged in suction port, axially relative at cylinder 32 of the other end of oil pipe 314 and the central axis of suction port, that is, the suction side of oil pipe 314 can be positioned at immediately below suction port central axis, thus oil pipe 314 can lubricant oil immediately below inhale hole.Like this, due in the process that rotary compressor 100 runs, by sucking, refrigerant cools lubricant oil near suction port, temperature is lower, the suction side of oil pipe 314 is stretched to after in the oil sump immediately below suction port, oil pipe 314 can extract the relatively low lubricant oil of this regional temperature to spray into exhaust cavity 3212, thus can coolant exhaust chamber 3212 better, reduce compression loss, reduce compression process merit, reduce leakage, improve cold, simultaneously, the lubricating oil viscosity lower due to temperature is higher, thus can play better lubrication and seal action.Improve the lubrication of lubricant oil, cooling, seal action to a certain extent.

Below, the working procedure of the rotary compressor 100 according to the utility model embodiment is briefly described with reference to Fig. 1-Figure 13, rotary compressor 100 is high back pressure compressor in the present embodiment, in the process that rotary compressor 100 runs, by the to-and-fro motion of slide plate 34 and the rolling of piston 33, achieve the regular opening and closing of nozzle opening 313, to lubricate the tip of slide plate 34, wherein, the size of nozzle opening 313 is the key factors affecting fuel injection quantity and injection time.

As shown in Figure 8 and Figure 9, piston 33 run to bottom dead center position before position time, between the tip high pressure side of slide plate 34 and piston 33 outer rim, there is larger gap, nozzle opening 313 is exposed, now oil spout can start, because the pressure of this moment exhaust cavity 3212 is less, larger with the pressure reduction of housing 1 inside, and the area of the nozzle opening 313 exposed is comparatively large, fuel injection quantity is now more.

As shown in Figure 10 and Figure 11, when piston 33 moves to bottom dead center position, the gap that the tip of slide plate 34 and piston 33 outer rim are formed reduces to some extent, and the pressure increase of exhaust cavity 3212, inside and outside differential pressure reduces, and fuel injection quantity reduces to some extent.

As shown in Figure 12 and Figure 13, piston 33 move to bottom dead center position after position time, pressure in exhaust cavity 3212 is close to the exhaust pressure of housing 1 inside, move along with on slide plate 34 and piston 33 position, the gap that both are formed reduces until disappear gradually, final nozzle opening 313 can hide by piston 33, oil spout stops.

Circulate when rotary compressor 100 works above-mentioned oil spout state always, the to-and-fro motion of slide plate 34 and the rolling of piston 33 periodically opening and closing nozzle opening 313, thus achieve slide plate 34 tip is lubricated pointedly, and control fuel injection quantity and injection time preferably simultaneously, ensure the reliable performance of rotary compressor 100.

In brief, due in high back pressure compressor, the pressure of housing 1 inside is exhaust pressure, thus under the pressure above oil sump is also in exhaust pressure, between compression stroke starting point and exhaust stroke starting point, by cylinder 32, the enclosed volume that piston 33 and slide plate 34 limit changes to exhaust pressure from suction pressure, thus the lubricant oil in oil sump can be introduced in exhaust cavity 314 by arranging oilhole 313 and oil pipe 313, to improve lubrication circumstances between piston 33 and slide plate 34, and the opening and closing of slide plate 34 and piston 33 co-controlling oilhole 313 in injection process, namely then allow lubricant oil to spray in cylinder 32 when oilhole 313 opens wide, spraying into of oil is then stoped when other stages of compression stroke.

In sum, according to the rotary compressor 100 of the utility model embodiment, the oilhole 313 under slide plate 34 movement locus is being opened on the on high-tension side supporting member of slide plate 34, by synergy movement, the cooperating of slide plate 34 with piston 33, can pointedly, the tip position of oil jet lubrication slide plate 34 effectively, fuel injection quantity can reduce effectively with the increase of angle of swing, avoids too much lubricant oil enter compression chamber 321 and increase the problem of telling oil mass.

Because the temperature of air aspiration cavity 3211 is lower, the temperature of exhaust cavity 3212 is higher, thus it is uneven around the thermo parameters method of cylinder 32 circumferential direction, like this, lubricant oil lower for temperature guided in oilhole 313 by pointing to oil pipe 314 below cylinder 32 inlet hole and sprays into exhaust cavity 3212, the lubrication of lubricant oil, cooling, seal action can be improved to a certain extent, improve the reliability of slide plate 34, reduce compression process merit, reduce leakage, improve cold.

In description of the present utility model, it will be appreciated that, term " " center ", " length ", " width ", " thickness ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.

In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.

Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.

Claims (12)

1. a rotary compressor, is characterized in that, comprising:

Housing, has oil sump in described housing; With

Compressing mechanism, described compressing mechanism comprises two supporting members, cylinder, piston, slide plate and bent axle, described two supporting members are located at the axial two ends of described cylinder to limit compression chamber between described cylinder, the lower end of described bent axle is through described two supporting members and described cylinder, described piston sleeve to be located on described bent axle and to be positioned at described compression chamber, described cylinder is formed with the vane slot be communicated with described compression chamber, described slide plate is located in described vane slot movingly, and the periphery wall of the tip of described slide plate and described piston only supports so that described compression chamber is separated into air aspiration cavity and exhaust cavity, at least one in described two supporting members is formed with oilhole, lubricant oil in described oil sump is suitable for being entered in described exhaust cavity by described oilhole to lubricate the tip of described slide plate, wherein when the length that described slide plate stretches in described compression chamber is the longest, the described tip of described slide plate is covered to oilhole described in small part.

2. rotary compressor according to claim 1, it is characterized in that, when the length that described slide plate stretches in described compression chamber is the longest, perpendicular to described cylinder axis to horizontal plane on, the connecting with the described periphery wall of described piston away from one end of described vane slot or covered by described piston of described oilhole.

3. rotary compressor according to claim 1, is characterized in that, described oilhole along described cylinder radial direction extend and parallel with described slide plate.

4. rotary compressor according to claim 3, is characterized in that, described oilhole away from the side sidewall of described air aspiration cavity and the side sidewall away from described air aspiration cavity of described slide plate concordant.

5. rotary compressor according to claim 1, is characterized in that, described oilhole be parallel to the length L on described vane motion direction meet: wherein, 90 °≤θ≤270 °, wherein, e is the offset of described bent axle, and r is the outer edge radius of described piston.

6. rotary compressor according to claim 1, is characterized in that, described oilhole is meeting perpendicular to the width D on described vane motion direction: wherein, D _slidingfor the thickness of described slide plate.

7. rotary compressor according to claim 1, is characterized in that, comprises further:

Oil pipe, it is described at least one that described oil pipe is located in described two supporting members, and one end of described oil pipe is communicated with described oilhole, and the other end of described oil pipe immerses in described oil sump.

8. rotary compressor according to claim 7, is characterized in that, the angle α between the center line of described oil pipe and the central axis of described cylinder meets: 0≤α <90 °.

9. rotary compressor according to claim 7, is characterized in that, described cylinder has the suction port be communicated with described air aspiration cavity, axially relative at described cylinder of the described the other end of wherein said oil pipe and the central axis of described suction port.

10. the rotary compressor according to any one of claim 1-9, is characterized in that, described oilhole is circular port, slotted eye, long-round-shape hole or polygonal hole.

11. compressors according to claim 1, is characterized in that, described cylinder is one, and described two supporting members are main bearing and supplementary bearing.

12. compressors according to claim 1, is characterized in that, described cylinder is multiple, are provided with dividing plate between two often adjacent described cylinders, and at least one among described two supporting members is described dividing plate.