CN203404088U - Low-backpressure rotary compressor and refrigeration equipment provided with same - Google Patents
Low-backpressure rotary compressor and refrigeration equipment provided with same Download PDFInfo
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- CN203404088U CN203404088U CN201320471191.0U CN201320471191U CN203404088U CN 203404088 U CN203404088 U CN 203404088U CN 201320471191 U CN201320471191 U CN 201320471191U CN 203404088 U CN203404088 U CN 203404088U
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Abstract
The utility model discloses a low-backpressure rotary compressor and refrigeration equipment provided with the same. The low-backpressure rotary compressor comprises a case, a compression mechanism, a drive motor and a flow stopping cover. The compression mechanism is arranged inside the case and provided with a crankshaft and a main bearing, and the main bearing is provided with an air suction opening. The drive motor comprises a stator and a rotor, and a balance block is arranged on the bottom, close to the main bearing, of the rotor. The flow stopping cover covers the balance block. According to the low-backpressure rotary compressor, the flow stopping cover is arranged for separating the balance block and the air suction opening, when the rotor drives the balance block to rotate, the influence of airflow disturbance generated by rotation of the balance block to suction of refrigerating fluid can be effectively prevented, and therefore the air suction efficiency is improved, and the energy efficiency of the low-backpressure rotary compressor is improved to a certain extent.
Description
Technical field
The utility model relates to compressor constructions field, especially relates to a kind of low back pressure rotary compressor and has its chiller plant.
Background technique
It is high back pressure structure that the rotary compressor now extensively adopting all adopts housing inner high voltage power, the refrigeration agent of getting back to compressor from system is by gas-liquid separator, the refrigeration agent of gaseous state is directly drawn into completes compression in cylinder, high-temperature high-pressure refrigerant after overcompression is drained into compressor space, after cooling motor, discharge compressor, enter systemic circulation.
With respect to the rotary compressor of high back pressure structure, exist in a kind of housing as low-pressure is the low back-pressure structure rotary compressor being communicated with pressure of inspiration(Pi) in housing.The compressor of this structure is compared high back pressure compressor in some fields, particularly in following rotary compressor field, there is special advantage, this be motor due to low back pressure compressor in the air-breathing environment of low-temp low-pressure, there will not be high back pressure compressor because delivery temperature is high, to cause like that the too high or cooling deficiency of motor of motor temperature.In addition, under environment under low pressure, the content of compressor inner refrigerant will significantly reduce, and the refrigerant charge of refrigeration system can significantly be reduced.
But, compare high back pressure compressor, still there are some technical problems in low back pressure rotary compressor, for example, for balance crankshaft is due to the caused offset of eccentric setting piston, need to equilibrium block be set in the bottom of rotor, can be to equilibrium block air-flow generation around disturbance thereby equilibrium block rotates with rotor high-speed, when refrigeration agent sucks as gas, because main bearing intakeport is positioned at balancing rotor piece below, can be subject to rotor and rotate the flow perturbation impact causing, refrigeration agent sucks not exclusively from main bearing suction port, thereby can reduce the refrigerating capacity of compressor, and then can have influence on the efficiency of compressor.
Model utility content
The utility model is intended to solve at least to a certain extent one of above-mentioned technical problem of the prior art.
For this reason, an object of the present utility model is to propose a kind of low back pressure rotary compressor, and this low back pressure rotary compressor is provided with the Choked flow cover for equilibrium block and intakeport are kept apart, thereby can improve the gettering efficiency of low back pressure rotary compressor.
Another object of the present utility model is to propose a kind of chiller plant, and this chiller plant comprises above-mentioned low back pressure rotary compressor.
According to an aspect of the present utility model, a kind of low back pressure rotary compressor has been proposed, this low back pressure rotary compressor comprises: housing; Compressing mechanism, described compressing mechanism is located in described housing, and described compressing mechanism has bent axle and main bearing, on described main bearing, is provided with intakeport; Drive motor, described drive motor comprises stator and rotor, the contiguous described main bearing in bottom of described rotor and the bottom of described rotor are provided with equilibrium block; And Choked flow cover, described Choked flow cover is located at the outside of described equilibrium block.
According to low back pressure rotary compressor of the present utility model, by Choked flow cover is set, equilibrium block and intakeport are kept apart, when rotor banding dynamic balance weight rotates, can effectively prevent the impact that flow perturbation that equilibrium block rotate to produce sucks refrigeration agent, thereby improved gettering efficiency, the efficiency of low back pressure rotary compressor is increased.
In addition, according to low back pressure rotary compressor of the present utility model, can also there is following additional technical feature:
According to embodiments more of the present utility model, the central axis of described Choked flow cover and the central axes of described bent axle.
When rotor banding dynamic balance weight rotates like this, can not interfere with Choked flow cover.
According to embodiments more of the present utility model, the upper-end surface of described Choked flow cover is not less than the upper-end surface of described equilibrium block.
Can guarantee so can not exerted an influence to intakeport refrigerant air-flow around by the air-flow of disturbance, guarantee gettering efficiency.
According to embodiments more of the present utility model, described Choked flow cover is fixed on described main bearing.
According to embodiments more of the present utility model, described main bearing comprises base portion and hub portion, and described hub portion is located on described base portion and extends upward, and wherein said Choked flow cover is fixed on described base portion or described hub portion.
According to embodiments more of the present utility model, described Choked flow cover comprises the first cover body of annular and the second cover body of annular, described the second cover body be located at coaxially described the first cover body below, the internal face of described the first cover body and the outer side surface of described equilibrium block are spaced apart.
According to embodiments more of the present utility model, on the upper surface of described base portion, be provided with annular groove, the radial dimension of described the second cover body is greater than the radial dimension of described hub portion, and the lower end of described the second cover body is fixed in described groove.
According to embodiments more of the present utility model, on the outer circumferential face of described hub portion, be provided with the first fixing part, on described the second cover body, be provided with the second fixing part, described the first fixing part and described the second fixing part are adaptive so that described Choked flow cover is fixed in described hub portion.
According to embodiments more of the present utility model, described the first fixing part is fixed groove, and described the second fixing part is projection, and described projection is located on the internal face of described the second cover body and is positioned at the place, lower end surface of described the second cover body.
According to embodiments more of the present utility model, described the second cover body and described hub portion interference fit.
According to embodiments more of the present utility model, on the upper surface of described base portion, be provided with oil groove, on described Choked flow cover, be provided with oil outlet, described oil outlet is relative with described oil groove.
By oil groove is set, thereby can collect machine oil in Choked flow cover simultaneously by this part engine oil supplying bottom oil sump, avoid a large amount of machine oil to be inhaled in compression chamber and together discharge with exhaust and cause oil sump liquid level to reduce, thereby guaranteeing that each friction pair can obtain good lubrication effect.
According to embodiments more of the present utility model, described oil groove is straight trough, the center line of described oil groove and the first plane are angle [alpha], and wherein α meets: 90 °≤α≤270 °, described the first plane is: the plane that the central axis of described bent axle and the central axis of described intakeport limit.
According to embodiments more of the present utility model, described Choked flow cover is fixed on described equilibrium block.
According to embodiments more of the present utility model, described Choked flow cover comprises the 3rd cover body, and described the 3rd cover body is configured to tubular, on the diapire of described the 3rd cover body, is formed with central through bore.
According to embodiments more of the present utility model, described Choked flow cover is solid of rotation.
According to embodiments more of the present utility model, described Choked flow cover is metalwork or working of plastics.
According to embodiments more of the present utility model, described compressing mechanism comprises:
Cylinder, wherein said main bearing be located at described cylinder above;
Supplementary bearing, described supplementary bearing be located at described cylinder below to limit described compression chamber between described main bearing, described cylinder and described supplementary bearing;
Cover plate, described cover plate be located at described supplementary bearing below to limit exhaust cavity between described cover plate and described supplementary bearing, described exhaust cavity communicates with described compression chamber by described relief opening;
Be used to open or close the outlet valve of described relief opening;
Wherein said bent axle runs through described main bearing, described supplementary bearing and described cover plate, on described bent axle, is arranged with piston, and described piston is positioned at described compression chamber.
According on the other hand of the present utility model, a kind of chiller plant has been proposed, this chiller plant comprises above-mentioned low back pressure rotary compressor.
Accompanying drawing explanation
Fig. 1 is according to the schematic diagram of an embodiment's of the utility model low back pressure rotary compressor
Fig. 2 is the enlarged view that Fig. 1 centre circle shows C portion;
Fig. 3 is according to the schematic diagram of the Choked flow cover of an embodiment's of the utility model low back pressure rotary compressor;
Fig. 4 is according to the plan view of the Choked flow cover of an embodiment's of the utility model low back pressure rotary compressor;
Fig. 5 is according to the plan view of the main bearing of an embodiment's of the utility model low back pressure rotary compressor;
Fig. 6 is according to another embodiment's of the utility model the Choked flow cover of low back pressure rotary compressor and the schematic diagram of main bearing;
Fig. 7 is according to another embodiment's of the utility model the Choked flow cover of low back pressure rotary compressor and the schematic diagram of main bearing;
Fig. 8 is according to the schematic diagram of another embodiment's of the utility model low back pressure rotary compressor;
Fig. 9 is the Choked flow cover of low back pressure rotary compressor shown in Fig. 8 and the schematic diagram of main bearing;
Figure 10 is the schematic diagram of the Choked flow cover of the low back pressure rotary compressor shown in Fig. 8.
Reference character:
Upper shell 11, main casing 12, lower shell body 13;
Main bearing 21, intakeport 211, base portion 212, oil groove 2121, groove 2122, hub portion 213;
Supplementary bearing 23, outlet valve 231;
Cover plate 24;
Bent axle 25;
Piston 26;
Sucking pipe 27;
Outlet pipe 28;
Gas and oil separating plant 29;
Stator 31, rotor 32;
Choked flow cover 4, the first cover body 41, the second cover body 42, the three cover bodies 43, oil outlet 44, projection 421;
Compression chamber A, exhaust cavity B.
Embodiment
Describe embodiment of the present utility model below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment who is described with reference to the drawings, be exemplary, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly 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, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but contact by the other feature between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
Below with reference to Fig. 1-Figure 10, describe according to the utility model embodiment's low back pressure rotary compressor.
According to an embodiment's of the utility model low back pressure rotary compressor, can comprise housing, compressing mechanism, drive motor and Choked flow cover 4.
According to an embodiment of the present utility model, as shown in Figure 1, housing can comprise main casing 12, upper shell 11 and lower shell body 13, upper shell 11 be located at main casing 12 above, upper shell 11 can be integrally welded with main casing 12, lower shell body 13 be located at main casing 12 below, lower shell body 13 can be integrally welded with main casing 12, upper shell 11, main casing 12 and lower shell body 13 are encircled into an installation cavity.
As shown in Fig. 1 and Fig. 8, for low back pressure rotary compressor, its compressing mechanism has been prior art and has been well known for ordinary skill in the art, therefore, here concrete structure and the working principle of compressing mechanism only described simply.For example, according to an embodiment of the present utility model, shown in seeing figures.1.and.2, compressing mechanism is located in compressor housing, and compressing mechanism can comprise cylinder 22, main bearing 21, supplementary bearing 23, cover plate 24, outlet valve 231, bent axle 25 and piston 26.
Particularly, main bearing 21 be located at cylinder 22 above, supplementary bearing 23 be located at cylinder 22 below, main bearing 21, supplementary bearing 23 and cylinder 22 can be by together with a plurality of bolton.Between main bearing 21, cylinder 22 and supplementary bearing 23, limit compression chamber (the chamber A in Fig. 1 and Fig. 2), on main bearing 21, intakeport 211 can be set, intakeport 211 and compression chamber internal communication, can be formed with the relief opening communicating with compression chamber on supplementary bearing 23.Certainly, be understandable that, the setting position of intakeport 211 and relief opening is not limited to this.
Shown in Fig. 1 and Fig. 8, bent axle 25 runs through main bearing 21, supplementary bearing 23 and cover plate 24, the lower end of bent axle 25 extend in the lubricating oil oil sump of compressor housing inner bottom part, in bent axle 25, can be formed with center oilhole, center oilhole is for providing lubricant oil to the lubricated parts of needs or contact friction place, to reduce the abrasion of corresponding part, in bent axle 25, can be provided with oily blade, oil blade rotates with bent axle 25, bent axle 25 rotates and will drive oily blade rotary thus, and oily blade rotary can increase the effect that oils.
The top of bent axle 25 and the rotor of drive motor 32 are fixed together.Piston 26 is set on bent axle 25 and is positioned at compression chamber, in cylinder 22, be also formed with vane slot, slide plate is located in vane slot by spring slidably, the tip of slide plate extend in compression chamber and only supports the outer circumferential face of piston 26, piston 26 is for compressing the refrigerant entering in compression chamber from intakeport 211, and refrigerant is after compression discharged from relief opening.
As shown in Figure 1, outlet valve 231 is located at exhaust ports and is used to open or close relief opening.Cover plate 24 be located at supplementary bearing 23 below, for example cover plate 24 can limit exhaust cavity (the chamber B in Fig. 1) by a plurality of bolton below supplementary bearing 23 between cover plate 24 and supplementary bearing 23, exhaust cavity communicates with compression chamber by relief opening.
Shown in Fig. 1, on housing, be provided with outlet pipe 28, one end of outlet pipe 28 is communicated with exhaust cavity, for example outlet pipe 28 wears supplementary bearing 23 and communicates with exhaust cavity inside, refrigerant in exhaust cavity can directly be discharged to by this outlet pipe 28 outside of compressor housing like this, the other end of outlet pipe 28 can be connected with gas and oil separating plant 29, the High Temperature High Pressure refrigerant being drained into like this in exhaust cavity enters in gas and oil separating plant 29 by outlet pipe 28, gas and oil separating plant 29 can carry out separation by the refrigerant containing organic oil, machine oil is stored in to the bottom of gas and oil separating plant 29 and inputs to housing, make this part machine oil again flow back to bottom oil sump, gaseous coolant after separation can enter systemic circulation.
Drive motor is located at the vertical central axis for driving crank 25 flexing axles 25 in housing and rotates.Particularly, drive motor can comprise rotor 32 and stator 31, stator 31 can be fixed on the internal face of compressor housing, as stator 31 can be welded on the internal face of main casing 12, rotor 32 is located at stator 31 inner sides rotationally, rotor 32 can be fixed together with the top of bent axle 25, and stator 31 can drive rotor 32 band dynamic crankshaft 25 rotations thus.
Wherein, owing to being provided with eccentric part on bent axle 25, on eccentric part, be arranged with piston 26, therefore bent axle 25 is when High Rotation Speed, can be subject to very large eccentric force, cause bent axle 25 to perturb and increase bent axle 25 wearing and tearing, for balance is due to the caused offset of piston 26 eccentric setting, existing low back pressure rotary compressor can arrange equilibrium block 5 on rotor 32, for equalizing piston 26 and eccentric part.
Thus, at the sucking pipe 27 by case top, be back to the refrigerant in housing, after passing through the cooling drive motor of drive motor, can be inhaled in compression chamber and compress by intakeport 211, but because equilibrium block 5 is positioned at the top of main bearing 21 and is close to main bearing 21, during equilibrium block 5 High Rotation Speed, can produce strong disturbance to equilibrium block 5 air-flow around, affect gettering efficiency, cause refrigerant not to be drawn in compression chamber fully.
In view of this, according to an embodiment's of the utility model low back pressure rotary compressor, be provided with Choked flow cover 4, Choked flow cover 4 is located at the outside of equilibrium block 5 so that intakeport 211 and equilibrium block 5 are kept apart, thus the impact on gettering efficiency on the disturbance of air-flow around equilibrium block 5 while reducing at least to a certain extent equilibrium block 5 rotation.
In other words, Choked flow cover 4 is enclosed within the outside of equilibrium block 5 and encases equilibrium block 5, thus, during equilibrium block 5 high speed rotating, be equivalent to the air-flow of Choked flow cover 4 inside to carry out disturbance, and due to the buffer action of Choked flow cover 4, this part can not exerted an influence to intakeport 211 refrigerant air-flow around by the air-flow of disturbance, thereby improve gettering efficiency.
According to the utility model embodiment's low back pressure rotary compressor, by Choked flow cover 4 is set, equilibrium block 5 and intakeport 211 are kept apart, when rotor 32 band dynamic balance weights 5 rotate, can effectively prevent that equilibrium block 5 from rotating the impact that the flow perturbation that produces sucks refrigeration agent, thereby improved gettering efficiency, the efficiency of low back pressure rotary compressor is increased.
According to an embodiment of the present utility model, the central axes of the central axis of Choked flow cover 4 and bent axle 25.For example Choked flow cover 4 can be configured to annular parts, and as solid of rotation, the central axis of Choked flow cover 4 preferably overlaps with the central axis of bent axle 25, when rotor 32 band dynamic balance weights 5 rotate like this, can not interfere with Choked flow cover 4.
According to embodiments more of the present utility model, the upper-end surface of Choked flow cover 4 is not less than the upper-end surface of equilibrium block 5, for example, preferably, the upper-end surface of Choked flow cover 4 is a little more than the upper-end surface of equilibrium block 5, can guarantee so can not exerted an influence to intakeport 211 refrigerant air-flow around by the air-flow of disturbance, guarantee gettering efficiency.
According to embodiments more of the present utility model, Choked flow cover 4 is fixed on main bearing 21.Particularly, as shown in Figures 2 and 3, main bearing 21 can comprise base portion 212 and hub portion 213, hub portion 213 is located on base portion 212 and extends upward, base portion 212 can be large circular ring type, and hub portion 213 can be tubular substantially, and hub portion 213 is located at the upper surface of base portion 212 coaxially.Preferably, base portion 212 and hub portion 213 integrally casting moulding.Wherein Choked flow cover 4 is fixed in base portion 212 or hub portion 213.
According to an embodiment of the present utility model, as shown in Figure 3 and Figure 4, above Choked flow cover 4 comprises that the first cover body 41 of annular and the second cover body 42, the first cover bodies 41 of annular are positioned at, below the second cover body 42 is positioned at, for example the second cover body 42 be located at coaxially the first cover body 41 below.As shown in Figure 4, the first cover body 41 and the second cover body 42 all can be the ring of standard, the outer side surface spaced apart (as shown in Figure 2) of the internal face of the first cover body 41 and equilibrium block 5, thereby while avoiding equilibrium block 5 to rotate and the first cover body 41 interfere.It should be noted that, the outer side surface of equilibrium block 5 refers to the surface contiguous and relative with the first cover body 41 internal faces.
Shown in Fig. 2 and Fig. 5, on the upper surface of base portion 212, be provided with groove 2122, the radial dimension of the second cover body 42 is greater than the radial dimension of hub portion 213, thereby the week that the second cover body 42 can be enclosed within hub portion 213 laterally, the lower end of the second cover body 42 can be fixed in groove 2122, for example the lower periphery of the second cover body 42 can clip in groove 2122.
Preferably, groove 2122 is annular, and the central axes of the central axis of groove 2122 and bent axle 25, and groove 2122 forms the toroidal cavity 2122 around bent axle 25.Wherein, need explanation a bit, the radial dimension of above-mentioned the second cover body 42 refers to the radial dimension of the second cover body 42 inner peripheral surfaces, and the radial dimension of above-mentioned hub portion 213 refers to the radial dimension of the outer circumferential face of hub portion 213.
According to another embodiment of the present utility model, as shown in Figure 6, Choked flow cover 4 is fixed in hub portion 213, particularly, on the outer circumferential face of hub portion 213, be provided with the first fixing part, on the second cover body 42, be provided with the second fixing part, the first fixing part and the second fixing part are adaptive, that is to say, thereby the first fixing part and the second fixing part match Choked flow cover 4 are fixed in hub portion 213.
Alternatively, the first fixing part is fixed groove, the second fixing part is projection 421, projection 421 is located on the internal face of the second cover body 42 and is positioned on the lower end surface of the second cover body 42, like this when assembling Choked flow cover 4, projection 421 is aimed at and snapped in fixed groove, thereby Choked flow cover 4 is fixed in hub portion 213.Preferably, in this embodiment, fixed groove is annular, and protruding 421 correspondences also form annular.Preferably, projection the 421 and second cover body 42 is into a single integrated structure, and projection 421 is a part for the second cover body 42.
Of course it is to be understood that the utility model is not limited to this, for example projection 421 also can be arranged on the outer circumferential face of hub portion 213, and fixed groove can corresponding be formed on the internal face of the second cover body 42.
According to another embodiment of the present utility model, as shown in Figure 7, Choked flow cover 4 is fixed in hub portion 213, but means of fixation is slightly different from the mode of above-mentioned fixed groove, projection 421, in this embodiment, the second cover body 42 and hub portion 213 interference fit, that is to say, the internal diameter size of the second cover body 42 is slightly larger than the outside dimension of hub portion 213, thus the second cover body 42 securely clip in the outside of hub portion 213.
Because the inner bottom part of low back pressure rotary compressor is provided with the oil sump that offers bent axle 25 each kinematic pair lubricant oil such as grade, lubricant oil passes through the oily blade in bent axle 25 under the effect of pressure reduction, taking lubricant oil to compressing mechanism inside is lubricated and seals, wherein a part is overflowed from main bearing 21 internal helicoid oil groove upper end outlets, the machine oil overflowing is from the hub portion 213 of main bearing 21 toward the upper surface downstream to base portion 212, a part in this part machine oil can be back in the oil sump of bottom, a part is owing to sucking the drive of gas in addition, will and air-breathingly enter in the lump in compression chamber along intakeport, in compression chamber, by piston 26, compressed, can cause like this compressor efficiency to reduce, and machine oil can be deflated takes housing out of, thereby cause oil sump bottom liquid level to reduce, bent axle 25 difficulty that oils, each kinematic pair can not get effectively lubricating, efficiency and the life-span of compressor have further been reduced.
In view of this, according to preferred embodiments more of the present utility model, be provided with oil groove 2121 on the upper surface of base portion 212, oil groove 2121 is suitable for the machine oil of collecting to export to bottom oil sump, for supplementing the machine oil in the oil sump of bottom.On Choked flow cover 4, be provided with oil outlet 44, oil outlet 44 is relative with oil groove 2121.Here, it should be noted that, oil outlet 44 machine oil of discharging from oil outlet 44 that can be understood as relative to oil groove 2121 can flow in oil groove 2121.
For example, in the example of Fig. 2, oil outlet 44 can directly join and be communicated with oil groove 2121.In the example of Fig. 6 and Fig. 7, due to Choked flow cover 4 be positioned at main bearing 21 base portions 212 above, now oil outlet 44 be positioned at oil groove 2121 above, and oil outlet 44 is relative with oil groove 2121, the machine oil flowing out from oil outlet 44 like this can flow in oil groove 2121.
By oil groove 2121 is set, thereby can collect machine oil in Choked flow cover 4 simultaneously by this part engine oil supplying bottom oil sump, avoid a large amount of machine oil to be inhaled in compression chamber and together discharge with exhaust and cause oil sump liquid level to reduce, thereby guaranteeing that each friction pair can obtain good lubrication effect.
Preferably, as shown in Figure 5, oil groove 2121 is straight trough, and the center line of oil groove 2121 and the first plane are angle [alpha], wherein α meets: 90 °≤α≤270 °, described the first plane is: the plane that the central axis of the central axis of bent axle 25 and intakeport 211 limits.
According to another embodiment of the present utility model, as Figure 8-Figure 10, Choked flow cover 4 is fixed on equilibrium block 5, and for example Choked flow cover 4 can be integrally welded with equilibrium block 5, or can pass through bolton.
Further, in this embodiment, as shown in figure 10, Choked flow cover 4 comprises the 3rd cover body 43, the 3rd cover body 43 is configured to tubular, on the diapire of the 3rd cover body 43, is formed with central through bore, and the 3rd cover body 43 is arranged in central through bore with equilibrium block 5 hub portion 213 fixing and main bearing 21.In this embodiment, equilibrium block 5 rotates and can drive Choked flow cover 4 together to rotate.
Preferably, Choked flow cover 4 i.e. the 3rd cover body 43 is solid of rotation, and the central axes of the central axis of this solid of rotation and bent axle 25.Because Choked flow cover 4 is solid of rotation and coaxially arranges with bent axle 25, so equilibrium block 5 disturbance effect that 4 pairs of Choked flow covers air-flow around produces while driving Choked flow covers 4 to rotate is less, can improve inspiratory effects equally.
According to embodiments more of the present utility model, Choked flow cover 4 can be metalwork, such as Choked flow cover 4, can be to be made by materials such as copper, aluminium, steel.According to other embodiments of the present utility model, Choked flow cover 4 is working of plastics.
Thus, can allow Choked flow cover 4 in the process of compressor operating, bear better the resistance that gas (Choked flow cover 4 inside) flows and brings, thereby guarantee that compressor operating is reliable.
To sum up, in brief, according to an embodiment's of the utility model low back pressure rotary compressor, can reduce well the flow perturbation impact from main bearing 21 intakepories 211 suctions on refrigerant causing because of equilibrium block 5 rotations, reduce the oil content that sucks refrigerant simultaneously, thereby reduce the oil content of exhaust, improved the performance of compressor.
Below simply describe according to the utility model embodiment's chiller plant.
According to an embodiment's of the utility model chiller plant, comprise the low back pressure rotary compressor of describing in above-described embodiment.According to embodiments more of the present utility model, chiller plant can be single cool equipment or changes in temperature equipment (heat pump).Be understandable that, according to an embodiment's of the utility model chiller plant, can comprise vaporizer, condenser, expansion mechanism, throttle mechanism etc., for concrete structure and the working principle of these existing parts, repeat no longer one by one here.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiments or example.In addition, those skilled in the art can engage the different embodiments that describe in this specification or example and combine.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in scope of the present utility model, modification, replacement and modification.
Claims (18)
1. a low back pressure rotary compressor, is characterized in that, comprising:
Housing;
Compressing mechanism, described compressing mechanism is located in described housing, and described compressing mechanism has bent axle and main bearing, on described main bearing, is provided with intakeport;
Drive motor, described drive motor comprises stator and rotor, the contiguous described main bearing in bottom of described rotor and the bottom of described rotor are provided with equilibrium block; And
Choked flow cover, described Choked flow cover is located at the outside of described equilibrium block.
2. low back pressure rotary compressor according to claim 1, is characterized in that, the central axis of described Choked flow cover and the central axes of described bent axle.
3. low back pressure rotary compressor according to claim 1, is characterized in that, the upper-end surface of described Choked flow cover is not less than the upper-end surface of described equilibrium block.
4. low back pressure rotary compressor according to claim 1, is characterized in that, described Choked flow cover is fixed on described main bearing.
5. low back pressure rotary compressor according to claim 4, is characterized in that, described main bearing comprises base portion and hub portion, and described hub portion is located on described base portion and extends upward, and wherein said Choked flow cover is fixed on described base portion or described hub portion.
6. low back pressure rotary compressor according to claim 5, it is characterized in that, described Choked flow cover comprises the first cover body of annular and the second cover body of annular, described the second cover body be located at coaxially described the first cover body below, the internal face of described the first cover body and the outer side surface of described equilibrium block are spaced apart.
7. low back pressure rotary compressor according to claim 6, it is characterized in that, on the upper surface of described base portion, be provided with annular groove, the radial dimension of described the second cover body is greater than the radial dimension of described hub portion, and the lower end of described the second cover body is fixed in described groove.
8. low back pressure rotary compressor according to claim 6, it is characterized in that, on the outer circumferential face of described hub portion, be provided with the first fixing part, on described the second cover body, be provided with the second fixing part, described the first fixing part and described the second fixing part are adaptive so that described Choked flow cover is fixed in described hub portion.
9. low back pressure rotary compressor according to claim 8, it is characterized in that, described the first fixing part is fixed groove, and described the second fixing part is projection, and described projection is located on the internal face of described the second cover body and is positioned at the place, lower end surface of described the second cover body.
10. low back pressure rotary compressor according to claim 6, is characterized in that, described the second cover body and described hub portion interference fit.
11. low back pressure rotary compressors according to claim 6, is characterized in that, on the upper surface of described base portion, are provided with oil groove, on described Choked flow cover, are provided with oil outlet, and described oil outlet is relative with described oil groove.
12. low back pressure rotary compressors according to claim 11, it is characterized in that, described oil groove is straight trough, the center line of described oil groove and the first plane are angle [alpha], wherein α meets: 90 °≤α≤270 °, described the first plane is: the plane that the central axis of described bent axle and the central axis of described intakeport limit.
13. low back pressure rotary compressors according to claim 1, is characterized in that, described Choked flow cover is fixed on described equilibrium block.
14. low back pressure rotary compressors according to claim 13, is characterized in that, described Choked flow cover comprises the 3rd cover body, and described the 3rd cover body is configured to tubular, on the diapire of described the 3rd cover body, is formed with central through bore.
15. low back pressure rotary compressors according to claim 14, is characterized in that, described Choked flow cover is solid of rotation.
16. low back pressure rotary compressors according to claim 1, is characterized in that, described Choked flow cover is metalwork or working of plastics.
17. low back pressure rotary compressors according to claim 1, is characterized in that, described compressing mechanism comprises:
Cylinder, wherein said main bearing be located at described cylinder above;
Supplementary bearing, described supplementary bearing be located at described cylinder below to limit described compression chamber between described main bearing, described cylinder and described supplementary bearing;
Cover plate, described cover plate be located at described supplementary bearing below to limit exhaust cavity between described cover plate and described supplementary bearing, described exhaust cavity communicates with described compression chamber by described relief opening;
Be used to open or close the outlet valve of described relief opening;
Wherein said bent axle runs through described main bearing, described supplementary bearing and described cover plate, on described bent axle, is arranged with piston, and described piston is positioned at described compression chamber.
18. 1 kinds of chiller plants, is characterized in that, comprise according to the low back pressure rotary compressor described in any one in claim 1-17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471191.0U CN203404088U (en) | 2013-08-02 | 2013-08-02 | Low-backpressure rotary compressor and refrigeration equipment provided with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471191.0U CN203404088U (en) | 2013-08-02 | 2013-08-02 | Low-backpressure rotary compressor and refrigeration equipment provided with same |
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| Publication Number | Publication Date |
|---|---|
| CN203404088U true CN203404088U (en) | 2014-01-22 |
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|---|---|---|---|
| CN201320471191.0U Expired - Fee Related CN203404088U (en) | 2013-08-02 | 2013-08-02 | Low-backpressure rotary compressor and refrigeration equipment provided with same |
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| CN (1) | CN203404088U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410736A (en) * | 2013-08-02 | 2013-11-27 | 广东美芝制冷设备有限公司 | Low-backpressure rotary compressor and refrigeration equipment adopting same |
| CN108087276A (en) * | 2017-12-28 | 2018-05-29 | 广东美芝制冷设备有限公司 | Low back pressure compressor |
-
2013
- 2013-08-02 CN CN201320471191.0U patent/CN203404088U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410736A (en) * | 2013-08-02 | 2013-11-27 | 广东美芝制冷设备有限公司 | Low-backpressure rotary compressor and refrigeration equipment adopting same |
| CN103410736B (en) * | 2013-08-02 | 2016-01-06 | 广东美芝制冷设备有限公司 | Low backpressure rotary compressor and there is its chiller plant |
| CN108087276A (en) * | 2017-12-28 | 2018-05-29 | 广东美芝制冷设备有限公司 | Low back pressure compressor |
| CN108087276B (en) * | 2017-12-28 | 2024-02-13 | 广东美芝制冷设备有限公司 | Low back pressure compressor |
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