CN104389790A - Low-backpressure compressor - Google Patents
Low-backpressure compressor Download PDFInfo
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- CN104389790A CN104389790A CN201410623773.5A CN201410623773A CN104389790A CN 104389790 A CN104389790 A CN 104389790A CN 201410623773 A CN201410623773 A CN 201410623773A CN 104389790 A CN104389790 A CN 104389790A
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Abstract
The invention discloses a low-backpressure compressor, comprising a shell body and a compression mechanism, wherein the compression mechanism is provided with two exhaust cavities including a first exhaust cavity and a second exhaust cavity, the second exhaust cavity is communicated with the first exhaust cavity; the compression mechanism comprises an air cylinder assembly and two bearings, the air cylinder assembly comprises at least one air cylinder, and a slip sheet cavity is arranged in each air cylinder. The two bearings are respectively a master bearing and a secondary bearing, an exhaust clapboard is arranged between at least one bearing and the air cylinder assembly, and at least one of the first exhaust cavity and the second exhaust cavity is limited by the exhaust clapboard and the corresponding bearing. According to the low-backpressure compressor, the exhaust cavities and the exhaust clapboard structure can be simplified, the sealing surfaces of the exhaust cavities are simple planes and are mechanically sealed, the cost is low and the reliability is high; the problems that low-backpressure compressor component structure is excessively complex, the technique difficulty is large, and the production cost is high are solved, and the reliability of the compressor is improved.
Description
Technical field
The present invention relates to compressor field, especially relate to a kind of low back pressure compressor.
Background technique
The rotary compressor of casing of low back pressure, the high-pressure refrigerant that compression chamber is discharged needs to arrive exhaust cavity by the exhaust port be located on bearing, then compressor is discharged by outlet pipe, for ensureing the sealing effect of exhaust cavity, usually two kinds of ways are had: one is the surface accuracy in lift-off seal face, mechanical seal is carried out by the surface of degree of precision, two is add sealing gasket at surface of contact to improve sealing effect, but due to the structural limitations in main bearing side sealing face and the more difficult lifting of precision, therefore the enforcement of scheme 1 is more difficult.Scheme 2 is owing to adding new material, the compatibility of sealing gasket and oil product and refrigeration agent is a difficult point in developing, simultaneously owing to using bearing to form exhaust cavity away from cylinder side and cover plate, and take into account oil to be separated and decrease of noise functions, the complex structure degree of part increases, difficulty of processing and cost higher, reliability also can be affected.
In correlation technique, oil sump is set bottom the exhaust cavity of compressing mechanism bottom, oil sump and slide plate chamber are provided with oil supply gallery, refrigerator oil is sucked slide plate chamber and lubricates by the negative pressure produced by slide plate to-and-fro motion, but this scheme can reduce slide plate backside pressure, and at slide plate over feeding, during the volume reducing of slide plate chamber, accumulate in refrigerator oil bottom slide plate chamber and can not return oil sump timely, cause slide plate cavity pressure to raise.When slide plate cavity pressure reduces, slide plate can be caused to be separated with piston; And during the rising of slide plate cavity pressure, can increase again the contact force of slide plate tip and piston, the problems referred to above can affect volumetric efficiency and enter power, and then affect efficiency and the reliability of compressor.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the present invention proposes a kind of low back pressure compressor, and exhaust cavity sealing surface is simple flat surface and carries out mechanical seal, and compressor arrangement is simple.
According to the low back pressure compressor of the embodiment of the present invention, comprise: housing and compressing mechanism, described housing is provided with relief opening and gas returning port, described compressing mechanism is located in described housing, described compressing mechanism has two exhaust cavitys, the second row air cavity that described two exhaust cavitys are respectively first row air cavity and are communicated with described first row air cavity, described first row air cavity is positioned at the top of described second row air cavity, described second row air cavity is communicated with described relief opening, described compressing mechanism comprises: cylinder assembly, described cylinder assembly comprises at least one cylinder, slide plate chamber is provided with in each described cylinder, two bearings, described two bearings are respectively main bearing and supplementary bearing, described main bearing is located on the upper-end surface of described cylinder assembly, described supplementary bearing is located on the lower end surface of described cylinder assembly, bearing described at least one and be provided with exhaust partition between described cylinder assembly, at least one in described first row air cavity and described second row air cavity is limited by described exhaust partition and corresponding described bearing.
According to the low back pressure compressor of the embodiment of the present invention, by being provided with exhaust partition, meet sealing function is carried out to exhaust cavity while, can simplify exhaust cavity and exhaust partition structure, exhaust cavity sealing surface is simple flat surface and carries out mechanical seal, cost is low and reliability is high, solves the problem that low back pressure compressor design of part is too complicated, technology difficulty is large, cost of production is high.
In specific embodiments more of the present invention, between described main bearing and described cylinder assembly, be provided with described exhaust partition, between described exhaust partition and described main bearing, limit described first row air cavity.
In other specific embodiments of the present invention, between described supplementary bearing and described cylinder assembly, be provided with described exhaust partition, between described exhaust partition and described supplementary bearing, limit described second row air cavity.
According to concrete examples more of the present invention, the described bearing being provided with described exhaust partition is provided with the first groove, and corresponding described exhaust partition is provided with the second groove, and described first groove and described second groove fit limit corresponding described exhaust cavity.
In some embodiments of the invention, gasket seal is provided with between described exhaust partition and corresponding described bearing.
According to some embodiments of the present invention, be provided with the first oil sump in described first row air cavity, described first oil sump is communicated with described slide plate chamber by the first oil supply gallery.
Further, be provided with the second oil sump in described second row air cavity, described second oil sump is communicated with described slide plate chamber by the second oil supply gallery.
Particularly, the cross-section area S1 of described first oil supply gallery meets following relation: 0.3mm
2<S1<12.5mm
2.
Particularly, the cross-section area S2 of described second oil supply gallery meets following relation: 0.3mm
2<S2<12.5mm
2.
Particularly, the thickness of described exhaust partition is greater than 5mm.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of low according to an embodiment of the invention back pressure compressor;
Fig. 2 is the schematic perspective view of exhaust partition according to an embodiment of the invention, and wherein exhaust partition is provided with the second groove;
Fig. 3 is the schematic diagram of another angle of the exhaust partition shown in Fig. 2;
Fig. 4 is the sectional drawing of the exhaust partition shown in Fig. 2;
Fig. 5 is the schematic diagram of the main bearing according to the embodiment of the present invention;
Fig. 6 is the schematic diagram of another angle of the main bearing shown in Fig. 5;
Fig. 7 is the sectional drawing of the main bearing shown in Fig. 5;
Fig. 8 is the schematic diagram of exhaust partition in accordance with another embodiment of the present invention;
Fig. 9 is the schematic diagram of low in accordance with another embodiment of the present invention back pressure compressor;
Figure 10 is the schematic diagram of the low back pressure compressor according to another embodiment of the present invention.
Reference character:
Low back pressure compressor 100, housing 1, relief opening 10, gas returning port 11, upper shell 12, main casing 13, lower shell body 14,
First row air cavity 20, first row pore 200, second row air cavity 22, second row pore 220, intercommunicating pore 21, cylinder 23, slide plate chamber 230, compression chamber 231, bearing 24, main bearing 24a, the first groove 240, supplementary bearing 24b, body 241, cover plate 242, exhaust partition 25, first exhaust partition 25a, the second exhaust partition 25b, the second groove 250, lock chamber 251, oil separator 26, bent axle 27, piston 28,
First oil sump 3, first oil supply gallery 30,
Second oil sump 4, second oil supply gallery 40,
Motor section 5, stator 50, rotor 51.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " 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 present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, 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 mechanical connection, also can be electrical connection or each other can communication; 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, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Describe the low back pressure compressor 100 according to the embodiment of the present invention in detail below with reference to Fig. 1-Figure 10, this low back pressure compressor 100 can be applied in the chiller plant such as air conditioner, refrigerator.
As shown in Fig. 1, Fig. 9 and Figure 10, according to the low back pressure compressor 100 of the embodiment of the present invention, comprising: housing 1 and compressing mechanism, housing 1 is provided with relief opening 10 and gas returning port 11.As shown in Figure 1, in concrete example of the present invention, housing 1 comprises main casing 13, upper shell 12 and lower shell body 14, upper shell 12 is located at the top of main casing 13, lower shell body 14 is located at the below of main casing 13, can be all adopt the mode be welded to connect to be fixed between upper shell 12 and main casing 13, between lower shell body 14 and main casing 13.Upper shell 12, limit holding space for holding compressing mechanism between main casing 13 and lower shell body 14, gas returning port 11 is located on upper shell 12, and relief opening 10 is located on main casing 13.It is appreciated of course that gas returning port 11 also can be located on main casing 13.
Compressing mechanism is located in housing 1, and compressing mechanism has two exhaust cavitys, the second row air cavity 22 that two exhaust cavitys are respectively first row air cavity 20 and are communicated with first row air cavity 20, and particularly, first row air cavity 20 is communicated with by intercommunicating pore 21 with second row air cavity 22.
First row air cavity 20 is positioned at the top of second row air cavity 22, and second row air cavity 22 is communicated with relief opening 10.Compressing mechanism comprises: cylinder assembly and two bearings 24, and wherein, cylinder assembly is located in housing 1, and cylinder assembly comprises at least one cylinder 23, is provided with slide plate chamber 230 in each cylinder 23.
Two bearings 24 are respectively main bearing 24a and supplementary bearing 24b, main bearing 24a is located on the upper-end surface of cylinder assembly, supplementary bearing 24b is located on the lower end surface of cylinder assembly, when low back pressure compressor 100 is single cylinder compressor, as shown in Fig. 1, Fig. 9 and Figure 10, cylinder assembly comprises a cylinder 23, and main bearing 24a is located on the upper-end surface of cylinder 23, and supplementary bearing 24b is located on the lower end surface of cylinder 23.When low back pressure compressor 100 is duplex cylinder compressor, cylinder assembly comprises two cylinders and central diaphragm, and central diaphragm is located between two cylinders, and two cylinders are upper cylinder and lower cylinder, main bearing 24a is located on the upper-end surface of upper cylinder, and supplementary bearing 24b is located on the lower end surface of lower cylinder.
Be provided with exhaust partition 25 between at least one bearing 24 and cylinder assembly, at least one in first row air cavity 20 and second row air cavity 22 is limited by exhaust partition 25 and corresponding bearing 24.Alternatively, the thickness of exhaust partition 25 is greater than 5mm.
Specifically, the setting of exhaust partition 25 divides three kinds of situations: the first situation is as shown in Figure 1, only have between main bearing 24a and cylinder assembly and be provided with exhaust partition 25, between exhaust partition 25 and main bearing 24a, limit first row air cavity 20, in supplementary bearing 24b, limit second row air cavity 22.The second situation only has between supplementary bearing 24b and cylinder assembly to be provided with exhaust partition 25, limits second row air cavity 22, limit first row air cavity 20 in main bearing 24a between exhaust partition 25 and supplementary bearing 24b.The third situation is as shown in Figure 9 and Figure 10, an exhaust partition 25 is provided with between main bearing 24a and cylinder assembly, also an exhaust partition 25 is provided with between supplementary bearing 24b and cylinder assembly, in that case, the exhaust partition 25 be located on main bearing 24a can be called the first exhaust partition 25a, the exhaust partition 25 be located on supplementary bearing 24b is called the second exhaust partition 25b, limit between first exhaust partition 25a and main bearing 24a between first row air cavity 20, second exhaust partition 25b and supplementary bearing 24b and limit second row air cavity 22.
Be understandable that, cylinder assembly also comprises the elements such as piston 28, outlet valve, bent axle 27, slide plate, be provided with compression chamber 231 in each cylinder 23, be enclosed within bent axle 27 outside piston 28, in each compression chamber 231, be provided with one is driven eccentric rotary piston 28 by bent axle 27.Each cylinder 23 is provided with vane slot, and slide plate is located in vane slot slidably and the tip of slide plate is only against on piston 28 all the time, and the tail end of slide plate extend in slide plate chamber 230.It will also be appreciated that simultaneously, low back pressure compressor 100 also comprises motor section 5, and motor section 5 is located in housing 1, and motor comprises stator 50 and rotor 51, be enclosed within outside rotor 51 on bent axle 27 and rotate with driving crank 27, the inwall that stator 50 is located at housing 1 is enclosed within rotor 51 outward.
Need to be described, in describing the invention, " on " can be direction towards motor section 5 on the axial direction of bent axle 27, D score can be the direction away from motor section 5 on the axial direction of bent axle 27.In concrete example of the present invention, the refrigerant type that low back pressure compressor 100 of the present invention uses can be carbonic acid class gas or hydrocarbon compound, and refrigerant type can also be flammable halogenated hydrocarbon compound.
Particularly, first row air cavity 20 is connected with compression chamber 231 by first row pore 200, and second row air cavity 22 is connected with compression chamber 231 by second row pore 220, and first row pore 200 and second row pore 220 open or close respectively by outlet valve.Wherein when main bearing 24a is provided with exhaust partition 25, the outlet valve being used to open or close first row pore 200 is located on exhaust partition 25.When supplementary bearing 24b is provided with exhaust partition 25, the outlet valve being used to open or close second row pore 220 is located on exhaust partition 25, in brief, cylinder assembly comprises two outlet valves, one of them outlet valve is used to open or close first row pore 200, at least one being used to open or close in second row pore 220, two outlet valves of another outlet valve is located on exhaust partition 25.When exhaust partition 25 is provided with outlet valve, exhaust partition 25 is provided with the lock chamber 251 for holding outlet valve.
When low back pressure compressor 100 works, when pressure in compression chamber 231 is greater than the exhaust pressure of outlet valve, outlet valve is opened, a part of gaseous refrigerant of discharging from compression chamber 231 is drained in first row air cavity 20 from first row pore 200, another part gaseous refrigerant of discharging from compression chamber 231 is drained in second row air cavity 22 from second row pore 220, gaseous refrigerant in first row air cavity 20 is drained in second row air cavity 22, and the refrigeration agent in second row air cavity 22 discharges compressor by relief opening 10.
According to the low back pressure compressor 100 of the embodiment of the present invention, by being provided with exhaust partition 25, meet sealing function is carried out to exhaust cavity while, can simplify exhaust cavity and exhaust partition 25 structure, exhaust cavity sealing surface is simple flat surface and carries out mechanical seal, cost is low and reliability is high, solves the problem that low back pressure compressor 100 design of part is too complicated, technology difficulty is large, cost of production is high, improves the reliability of compressor.
In some embodiments of the invention, as shown in Fig. 2-Fig. 7, the bearing 24 being provided with exhaust partition 25 is provided with the first groove 240, and corresponding exhaust partition 25 is provided with the second groove 250, first groove 240 and the cooperation of the second groove 250 limits corresponding exhaust cavity.Such as when main bearing 24a is provided with exhaust partition 25, then main bearing 24a can be provided with the first groove 240, the exhaust partition 25 be located on main bearing 24a is provided with the second groove 250.When supplementary bearing 24b is provided with exhaust partition 25, then supplementary bearing 24b also can be provided with the first groove 240, the exhaust partition 25 be located on supplementary bearing 24b is provided with the second groove 250.
It is appreciated of course that, exhaust cavity also can be only be arranged on the end face of the bearing 24 contacted with exhaust partition 25, that is, as shown in Figure 8, exhaust partition 25 is only provided with the lock chamber 251 for installing outlet valve, corresponding exhaust cavity is limited by the groove be located on bearing and exhaust partition 25.Thus the shape of more space to exhaust cavity can be had to be optimized, and then reach the balance of good oily separating effect and production and processing cost.
In some embodiments of the invention, gasket seal is provided with between exhaust partition 25 and corresponding bearing 24.Thus make surface of contact also have good sealing effect when lower accuracy, and then cut down finished cost, the reliability of low back pressure compressor 100 can be ensured further.
As shown in Figure 10, according to some embodiments of the present invention, be provided with the first oil sump 3, first oil sump 3 in first row air cavity 20 and be communicated with slide plate chamber 230 by the first oil supply gallery 30.Particularly, the cross-section area S1 of the first oil supply gallery 30 meets following relation: 0.3mm
2<S1<12.5mm
2.Due to the to-and-fro motion of slide plate in vane slot, the volume in slide plate chamber 230 can periodically change, when slide plate chamber 230 volume increases, first oil supply gallery 30 sucks lubricant oil, namely the lubricant oil in the first oil sump 3 enters in slide plate chamber 230, the amplitude that slide plate chamber 230 internal pressure reduces can be reduced, when slide plate chamber 230 volume reduces, unnecessary high-pressure refrigerant can be imported first row air cavity 20 rapidly by top first oil supply gallery 30, thus the pressure elevation amplitude reduced in slide plate chamber 230, reduce the pressure surge in slide plate chamber 230, improve the reliability of low back pressure compressor 100.
Further, as shown in Figure 10, be provided with the second oil sump 4, second oil sump 4 in second row air cavity 22 to be communicated with slide plate chamber 230 by the second oil supply gallery 40.Particularly, when slide plate chamber 230 volume increases, first oil supply gallery 30 and the second oil supply gallery 40 suck lubricant oil simultaneously, namely the lubricant oil in the first oil sump 3 and the second oil sump 4 enters in slide plate chamber 230, the amplitude that slide plate chamber 230 internal pressure reduces can be reduced, when slide plate chamber 230 volume reduces, due to Action of Gravity Field, oil in slide plate chamber 230 accumulates in bottom, the second oil sump 4 is back to by the second oil supply gallery 40, and unnecessary high-pressure refrigerant can be imported rapidly first row air cavity 20 by top first oil supply gallery 30, thus the pressure elevation amplitude reduced in slide plate chamber 230, the sectional dimension of adjustment first oil supply gallery 30 and the second oil supply gallery 40 can be passed through, when can contain lubrication and the sealing of certain lubricant oil guarantee slide plate side in slide plate chamber 230, do not affect efficiency and the reliability of compressor.
In concrete example of the present invention, the cross-section area S2 of the second oil supply gallery 40 meets following relation: 0.3mm
2<S2<12.5mm
2.
As shown in Fig. 1, Fig. 9 and Figure 10, in some embodiments of the invention, low back pressure compressor 100 also comprises oil separator 26, oil separator 26 is located in second row air cavity 22, the refrigeration agent entering into second row air cavity 22 can be carried out Oil-gas Separation by oil separator 26, gaseous refrigerant after Oil-gas Separation is discharged by relief opening 10, and the lubricant oil after Oil-gas Separation is deposited in second row air cavity 22.
Below with reference to Fig. 1, the low back pressure compressor 100 according to the present invention's first specific embodiment is described.
As shown in Figure 1, in this embodiment, low back pressure compressor 100 comprises: housing 1 and compressing mechanism, compressing mechanism comprises main bearing 24a, supplementary bearing 24b, cylinder 23 and exhaust partition 25, exhaust partition 25 is located on the upper-end surface of cylinder 23, main bearing 24a is located on the upper-end surface of exhaust partition 25, first row air cavity 20 is limited, being provided with groove limiting first row air cavity 20 to coordinate with main bearing 24a on the end face of main bearing 24a wherein only at exhaust partition 25 between main bearing 24a and exhaust partition 25.
Exhaust partition 25 is provided with first row pore 200, and first row air cavity 20 is communicated with the compression chamber 231 in cylinder 23 by first row pore 200.
Supplementary bearing 24b comprises body 241 and cover plate 242, cover plate 242 is located on the lower end surface of body 241, limit second row air cavity 22 between cover plate 242 and body 241, body 241 is provided with second row pore 220, and second row air cavity 22 is communicated with compression chamber 231 by second row pore 220.
Oil separator 26 is provided with in second row air cavity 22.Relief opening 10 is communicated with second row air cavity 22.
Below with reference to Fig. 9, the low back pressure compressor 100 according to the present invention's second specific embodiment is described.
As shown in Figure 9, in this embodiment, low back pressure compressor 100 comprises: housing 1 and compressing mechanism, and compressing mechanism is located in housing 1, and compressing mechanism comprises main bearing 24a, supplementary bearing 24b, cylinder 23, two exhaust partitions 25 and two outlet valves.Two exhaust partitions 25 are respectively the first exhaust partition 25a and the second exhaust partition 25b.
First exhaust partition 25a is located between main bearing 24a and cylinder 23, limits first row air cavity 20 between the first exhaust partition 25a and main bearing 24a.Second exhaust partition 25b is located between supplementary bearing 24b and cylinder 23, limits second row air cavity 22 between the second exhaust partition 25b and supplementary bearing 24b.
Wherein supplementary bearing 24b comprises body 241 and cover plate 242, and cover plate 242 is located on the lower end surface of body 241, the second exhaust partition 25b, limits second row air cavity 22 between body 241 and cover plate 242.
First exhaust partition 25a is provided with first row pore 200, second exhaust partition 25b and is provided with second row pore 220, two outlet valves and is located at respectively on the first exhaust partition 25a and the second exhaust partition 25b.
Be provided with oil separator 26 in second row air cavity 22, second row air cavity 22 is communicated with relief opening 10, and the refrigeration agent in second row air cavity 22 is discharged from relief opening 10 after the separation of oil separator 26.
Below with reference to Figure 10, the low back pressure compressor 100 according to the present invention's the 3rd specific embodiment is described.
As shown in Figure 10, in this embodiment, low back pressure compressor 100 comprises: housing 1, compressing mechanism, the first oil sump 3 and the second oil sump 4, and compressing mechanism is located in housing 1, and compressing mechanism comprises main bearing 24a, supplementary bearing 24b, cylinder 23, two exhaust partitions 25 and two outlet valves.Two exhaust partitions 25 are respectively the first exhaust partition 25a and the second exhaust partition 25b.
First exhaust partition 25a is located between main bearing 24a and cylinder 23, limits first row air cavity 20 between the first exhaust partition 25a and main bearing 24a.Second exhaust partition 25b is located between supplementary bearing 24b and cylinder 23, limits second row air cavity 22 between the second exhaust partition 25b and supplementary bearing 24b.
Wherein supplementary bearing 24b comprises body 241 and cover plate 242, and cover plate 242 is located on the lower end surface of body 241, the second exhaust partition 25b, limits second row air cavity 22 between body 241 and cover plate 242.
First exhaust partition 25a is provided with first row pore 200, second exhaust partition 25b and is provided with second row pore 220, two outlet valves and is located at respectively on the first exhaust partition 25a and the second exhaust partition 25b.
Be provided with oil separator 26 in second row air cavity 22, second row air cavity 22 is communicated with relief opening 10, and the refrigeration agent in second row air cavity 22 is discharged from relief opening 10 after the separation of oil separator 26.
Be provided with the first oil sump 3, first oil sump 3 in first row air cavity 20 to be communicated with slide plate chamber 230 by the first oil supply gallery 30.Be provided with the second oil sump 4, second oil sump 4 in second row air cavity 22 to be communicated with slide plate chamber 230 by the second oil supply gallery 40, the lubricant oil separated through oil separator 26 is deposited in the second oil sump 4.
Slide plate chamber 230 is arranged on cylinder 23, and is positioned at the afterbody of slide plate, and slide plate chamber 230 is that the first exhaust partition 25a, the second exhaust partition 25b and cylinder 23 coordinate the seal space formed.During compressor operation, due to the to-and-fro motion of slide plate in vane slot, the volume in slide plate chamber 230 can periodically change, when slide plate chamber 230 volume increases, first oil supply gallery 30 and the second oil supply gallery 40 suck lubricant oil simultaneously, namely the lubricant oil in the first oil sump 3 and the second oil sump 4 enters in slide plate chamber 230, the amplitude that slide plate chamber 230 internal pressure reduces can be reduced, when slide plate chamber 230 volume reduces, due to Action of Gravity Field, oil in slide plate chamber 230 accumulates in bottom, the second oil sump 4 is back to by the second oil supply gallery 40, and unnecessary high-pressure refrigerant can be imported rapidly first row air cavity 20 by top first oil supply gallery 30, thus the pressure elevation amplitude reduced in slide plate chamber 230, by adjusting the sectional dimension of the first oil supply gallery 30 and the second oil supply gallery 40, when can contain lubrication and the sealing of certain lubricant oil guarantee slide plate side in slide plate chamber 230, and do not affect efficiency and the reliability of compressor.
According to the low back pressure compressor 100 of the embodiment of the present invention, compressing mechanism can be simplified, by increasing the simple exhaust partition 25 of structure, exhaust cavity sealing configuration is simplified greatly, by optimizing slide plate chamber 230 oil supply structure, while ensure that slide plate chamber 230 internal pressure and fuel feeding, reduce the pressure surge in slide plate chamber 230, improve the reliability of compressor.Therefore low back pressure compressor 100 scenario-frame of the present invention is simple, and good manufacturability, practical application difficulty is low, and reliability is high, significantly improves the practical application feasibility of low back pressure compressor 100.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
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 invention 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 describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a low back pressure compressor, it is characterized in that, comprise: housing and compressing mechanism, described housing is provided with relief opening and gas returning port, and described compressing mechanism is located in described housing, and described compressing mechanism has two exhaust cavitys, the second row air cavity that described two exhaust cavitys are respectively first row air cavity and are communicated with described first row air cavity, described first row air cavity is positioned at the top of described second row air cavity, and described second row air cavity is communicated with described relief opening, and described compressing mechanism comprises:
Cylinder assembly, described cylinder assembly comprises at least one cylinder, is provided with slide plate chamber in each described cylinder;
Two bearings, described two bearings are respectively main bearing and supplementary bearing, described main bearing is located on the upper-end surface of described cylinder assembly, described supplementary bearing is located on the lower end surface of described cylinder assembly, bearing described at least one and be provided with exhaust partition between described cylinder assembly, at least one in described first row air cavity and described second row air cavity is limited by described exhaust partition and corresponding described bearing.
2. low back pressure compressor according to claim 1, is characterized in that, is provided with described exhaust partition between described main bearing and described cylinder assembly, limits described first row air cavity between described exhaust partition and described main bearing.
3. low back pressure compressor according to claim 1, is characterized in that, is provided with described exhaust partition between described supplementary bearing and described cylinder assembly, limits described second row air cavity between described exhaust partition and described supplementary bearing.
4. low back pressure compressor according to claim 1, it is characterized in that, the described bearing being provided with described exhaust partition is provided with the first groove, and corresponding described exhaust partition is provided with the second groove, and described first groove and described second groove fit limit corresponding described exhaust cavity.
5. low back pressure compressor according to claim 1, is characterized in that, is provided with gasket seal between described exhaust partition and corresponding described bearing.
6. low back pressure compressor according to claim 1, is characterized in that, is provided with the first oil sump in described first row air cavity, and described first oil sump is communicated with described slide plate chamber by the first oil supply gallery.
7. low back pressure compressor according to claim 6, is characterized in that, is provided with the second oil sump in described second row air cavity, and described second oil sump is communicated with described slide plate chamber by the second oil supply gallery.
8. low back pressure compressor according to claim 6, is characterized in that, the cross-section area S1 of described first oil supply gallery meets following relation: 0.3mm
2<S1<12.5mm
2.
9. low back pressure compressor according to claim 7, is characterized in that, the cross-section area S2 of described second oil supply gallery meets following relation: 0.3mm
2<S2<12.5mm
2.
10. low back pressure compressor according to claim 1, is characterized in that, the thickness of described exhaust partition is greater than 5mm.
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| CN201410623773.5A CN104389790B (en) | 2014-11-07 | 2014-11-07 | Low back pressure compressor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087275A (en) * | 2017-12-28 | 2018-05-29 | 广东美芝制冷设备有限公司 | Low back pressure compressor |
| CN108397393A (en) * | 2018-04-17 | 2018-08-14 | 珠海凌达压缩机有限公司 | Pump assembly and compressor and air conditioner |
| CN109595165A (en) * | 2017-09-30 | 2019-04-09 | 广东美芝制冷设备有限公司 | The compound compressor of high-low pressure segmentation |
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