CN203867899U - Multistage compressor - Google Patents
Multistage compressor Download PDFInfo
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- CN203867899U CN203867899U CN201420295304.0U CN201420295304U CN203867899U CN 203867899 U CN203867899 U CN 203867899U CN 201420295304 U CN201420295304 U CN 201420295304U CN 203867899 U CN203867899 U CN 203867899U
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Abstract
The utility model provides a multistage compressor comprising a crankshaft and multiple stages of cylinders. Multiple stages of eccentric parts are arranged on the crankshaft axially and are in one-to-one correspondence to the multiple stages of cylinders, the phase difference of a first-stage cylinder and a second-stage cylinder is within a range from 120 degrees to 240 degrees at the start time of air suction, and the phase difference of the second-stage cylinder and a third-stage cylinder is within a range from 120 degrees to 240 degrees at the start time of air suction. According to the multistage compressor, too high pressure pulsation of an middle cavity due to the fact that gas is accumulated in the middle cavity of one previous-stage cylinder and one next-stage cylinder can be avoided, continuity and smoothness of air suction of the previous-stage and next-stage cylinders are guaranteed, and further performance of the multistage compressor is improved.
Description
Technical field
The utility model relates to compressed machinery technical field, more specifically, relates to a kind of multistage compressor.
Background technique
The common rotor-type compressor of the many employings of existing air-conditioning or water-heater system, but in the time that air-conditioning or water heater use at low temperature environment, compressor refrigerant flow-rate ratio is lower, when compressor operating, the pressure ratio of single-stage will improve greatly, performance reduces, compressor long-time running reliability variation, is easily damaged.And the air-breathing linking between Two-stage Compression cylinder mesolow level cylinder and high pressure stage cylinder is reasonable not at present, often there will be high pressure stage cylinder in the time of inspiration peak, and low pressure stage cylinder does not arrive exhaust peak or is far away apart from the position of exhaust peak value; Or when the gettering rate of high pressure stage cylinder is lower, low pressure stage cylinder is in exhaust peak, these situations can cause the suction and discharge pulsation of height between arbitrarily downgrading, between low pressure stage and high pressure stage, the continuity of suction and discharge will directly have influence on the performance of compressor, in the time that one-level pressurized gas can not be sucked by high pressure stage cylinder in time, one-level pressurized gas causes the pressure of intermediate cavity to raise by lodging in intermediate cavity; And if when high pressure stage cylinder during in inspiration peak low pressure stage cylinder also reach far away exhaust peak value, this will cause high pressure stage cylinder gettering quantity deficiency, makes the hydraulic performance decline of compressor.
Model utility content
The utility model aims to provide a kind of multistage compressor, to solve the poor problem of existing multistage compressor performance reliability.
For solving the problems of the technologies described above, the utility model provides a kind of multistage compressor, this multistage compressor comprises bent axle and multi-stage cylinder, in the axial direction of bent axle, be provided with multistage eccentric part, multistage eccentric part and multi-stage cylinder arrange correspondingly, first order cylinder and second level cylinder at the phase difference of the air-breathing zero hour within the scope of 120 ° to 240 °, second level cylinder and third level cylinder at the phase difference of the air-breathing zero hour within the scope of 120 ° to 240 °.
Further, in the time of pressure of inspiration(Pi)≤2 of exhaust pressure/first order cylinder of second level cylinder, first order cylinder and second level cylinder at the phase difference of the air-breathing zero hour within the scope of 120 ° to 180 °; In the time of pressure of inspiration(Pi)≤2 of the exhaust pressure/second level of third level cylinder cylinder, second level cylinder and third level cylinder at the phase difference of the air-breathing zero hour within the scope of 120 ° to 180 °.
Further, in the time of the pressure of inspiration(Pi) >2 of exhaust pressure/first order cylinder of second level cylinder, first order cylinder and second level cylinder at the phase difference of the air-breathing zero hour within the scope of 180 ° to 240 °; In the time of the pressure of inspiration(Pi) >2 of the exhaust pressure/second level of third level cylinder cylinder, second level cylinder and third level cylinder at the phase difference of the air-breathing zero hour within the scope of 180 ° to 240 °.
Further, multi-stage cylinder is three-stage cylinder, multistage eccentric part is three grades of eccentric parts, three grades of eccentric parts are along the first order eccentric part setting gradually in the axial direction of bent axle, second level eccentric part and third level eccentric part, and first order eccentric part, second level eccentric part and third level eccentric part and three-stage cylinder arrange correspondingly.
Further, the eccentric direction of first order eccentric part is contrary with the eccentric direction of second level eccentric part, and the eccentric direction of second level eccentric part is identical with the eccentric direction of third level eccentric part; Angle between the slide plate of the second level cylinder that the slide plate of the first order cylinder that first order eccentric part is corresponding and second level eccentric part are corresponding is 0 °, and the angle between the slide plate of the second level cylinder that the slide plate of the third level cylinder that third level eccentric part is corresponding and second level eccentric part are corresponding is 180 °.
Further, the eccentric direction of first order eccentric part is contrary with the eccentric direction of second level eccentric part, and the eccentric direction of second level eccentric part is contrary with the eccentric direction of third level eccentric part; Angle between the slide plate of the second level cylinder that the slide plate of the first order cylinder that first order eccentric part is corresponding and second level eccentric part are corresponding is 0 °, and the angle between the slide plate of the second level cylinder that the slide plate of the third level cylinder that third level eccentric part is corresponding and second level eccentric part are corresponding is 0 °.
Further, the eccentric direction of first order eccentric part is identical with the eccentric direction of second level eccentric part, and the eccentric direction of second level eccentric part is contrary with the eccentric direction of third level eccentric part; Angle between the slide plate of the second level cylinder that the slide plate of the first order cylinder that first order eccentric part is corresponding and second level eccentric part are corresponding is 180 °, and the angle between the slide plate of the second level cylinder that the slide plate of the third level cylinder that third level eccentric part is corresponding and second level eccentric part are corresponding is 0 °.
Further, sense of rotation along bent axle: the eccentric direction line of first order eccentric part is 240 ° to the angle between the eccentric direction line of second level eccentric part, the eccentric direction line of second level eccentric part is 240 ° to the angle between the eccentric direction line of third level eccentric part; The slide plate of the first order cylinder that first order eccentric part is corresponding is 60 ° to the angle between the slide plate of second level cylinder corresponding to second level eccentric part, and the slide plate of the second level cylinder that second level eccentric part is corresponding is 60 ° to the angle between the slide plate of third level cylinder corresponding to third level eccentric part.
Further, sense of rotation along bent axle: the eccentric direction line of first order eccentric part is 120 ° to the angle between the eccentric direction line of second level eccentric part, the eccentric direction line of second level eccentric part is 120 ° to the angle between the eccentric direction line of third level eccentric part; The slide plate of the first order cylinder that first order eccentric part is corresponding is 300 ° to the angle between the slide plate of second level cylinder corresponding to second level eccentric part, and the slide plate of the second level cylinder that second level eccentric part is corresponding is 300 ° to the angle between the slide plate of third level cylinder corresponding to third level eccentric part.
Application the technical solution of the utility model, because the phase difference between first order cylinder and second level cylinder, between second level cylinder and third level cylinder is all within the scope of 120 ° to 240 °, therefore, in the time that first order cylinder is near exhaust peak value, second level cylinder is just in time near inspiration peak; In the time that second level cylinder is near exhaust peak value, third level cylinder near inspiration peak like this, second level cylinder can siphon away the gas of first order cylinder and the discharge of third level cylinder in time, third level cylinder can siphon away the gas of second level cylinder discharge in time, avoid in the middle cavity of gas accumulation between cylinder and cause the pressure pulsation of intermediate cavity excessive, air-breathing continuity and the smoothness of level cylinder before and after ensureing, and then the performance of raising multistage compressor.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 has schematically shown the sectional view of the multistage compressor pump housing in the utility model;
Fig. 2 has schematically shown the plan view of the first embodiment's of the present utility model bent axle;
Fig. 3 has schematically shown the right elevation of the first embodiment's of the present utility model bent axle;
Fig. 4 has schematically shown the A-A in Fig. 1 to view;
Fig. 5 has schematically shown the B-B in Fig. 1 to view;
Fig. 6 has schematically shown the C-C in Fig. 1 to view;
Fig. 7 has schematically shown the plan view of the second embodiment's of the present utility model bent axle;
Fig. 8 has schematically shown the right elevation of the second embodiment's of the present utility model bent axle;
Fig. 9 schematically show power the second embodiment of the present utility model corresponding to Fig. 4 position to view;
Figure 10 schematically shown the second embodiment of the present utility model corresponding to Fig. 5 position to view;
Figure 11 schematically shown the second embodiment of the present utility model corresponding to Fig. 6 position to view;
Figure 12 has schematically shown the plan view of the 3rd embodiment's of the present utility model bent axle;
Figure 13 has schematically shown the right elevation of the 3rd embodiment's of the present utility model bent axle;
Figure 14 schematically show power the 3rd embodiment of the present utility model corresponding to Fig. 4 position to view;
Figure 15 schematically shown the 3rd embodiment of the present utility model corresponding to Fig. 5 position to view;
Figure 16 schematically shown the 3rd embodiment of the present utility model corresponding to Fig. 6 position to view;
Figure 17 has schematically shown the plan view of the 4th embodiment's of the present utility model bent axle;
Figure 18 has schematically shown the right elevation of the 4th embodiment's of the present utility model bent axle;
Figure 19 schematically show power the 4th embodiment of the present utility model corresponding to Fig. 4 position to view;
Figure 20 schematically shown the 4th embodiment of the present utility model corresponding to Fig. 5 position to view;
Figure 21 schematically shown the 4th embodiment of the present utility model corresponding to Fig. 6 position to view;
Figure 22 has schematically shown the plan view of the 5th embodiment's of the present utility model bent axle;
Figure 23 has schematically shown the right elevation of the 5th embodiment's of the present utility model bent axle;
Figure 24 schematically show power the 5th embodiment of the present utility model corresponding to Fig. 4 position to view;
Figure 25 schematically shown the 5th embodiment of the present utility model corresponding to Fig. 5 position to view; And
Figure 26 schematically shown the 5th embodiment of the present utility model corresponding to Fig. 6 position to view.
Description of reference numerals: 100, cylinder; 110, first order cylinder; 111, the first intakeport; 112, first row gas port; 120, second level cylinder; 121, the second intakeport; 122, second row gas port; 130, third level cylinder; 131, the 3rd intakeport; 132, the 3rd relief opening; 200, bent axle; 210, first order eccentric part; 220, second level eccentric part; 230, third level eccentric part; 300, slide plate; 400, roller.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Shown in Figure 1, according to the first embodiment of the present utility model, a kind of multistage compressor is provided, this multistage compressor comprises bent axle 200 and multi-stage cylinder 100, in the axial direction of bent axle 200, be provided with multistage eccentric part, multistage eccentric part and multi-stage cylinder 100 arrange correspondingly, and first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour within the scope of 120 ° to 240 °, second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour within the scope of 120 ° to 240 °.According to the present embodiment, because the phase difference between first order cylinder 110 and second level cylinder 120, second level cylinder 120 and third level cylinder 130 is all within the scope of 120 ° to 240 °, therefore, in the time that first order cylinder 110 is near exhaust peak value, second level cylinder 120 is just in time near inspiration peak; In the time that second level cylinder 120 is near exhaust peak value, third level cylinder 130 near inspiration peak like this, second level cylinder 120 can siphon away the gas that first order cylinder 110 and third level cylinder 130 discharge in time, third level cylinder 130 can siphon away the gas that second level cylinder 120 discharges in time, avoid in the middle cavity of gas accumulation between cylinder 100 and cause the pressure pulsation of intermediate cavity excessive, air-breathing continuity and the smoothness of level cylinder before and after ensureing, and then the performance of raising multistage compressor.
Preferably, in the time of pressure of inspiration(Pi)≤2 of exhaust pressure/first order cylinder 110 of second level cylinder 120, first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour within the scope of 120 ° to 180 °; In the time of pressure of inspiration(Pi)≤2 of the exhaust pressure/second level of third level cylinder 130 cylinder 120, second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour within the scope of 120 ° to 180 °.In the present embodiment, if it is unreasonable that the compression chamber suction and discharge of cylinders at different levels are connected, second level cylinder 120 (third level cylinder 130) is in the time of inspiration peak, and first order cylinder 110 (second level cylinder 120) does not reach exhaust peak or far away apart from the position of exhaust peak value; Or when the gettering rate of second level cylinder 120 (third level cylinder 130) is lower, first order cylinder 110 (second level cylinder 120) is in exhaust peak value, all can cause the suction and discharge pulsation between arbitrarily downgrading of cylinder height larger, and then affect the performance of multistage compressor.In the time that first order cylinder 110 (second level cylinder 120) pressurized gas can not be sucked by second level cylinder 120 (third level cylinder 130) in time, Exhaust Gas causes the pressure of intermediate cavity to raise by lodging in intermediate cavity; And first order cylinder 110 (second level cylinders 120) also reach far away exhaust peak value during when second level cylinder 120 (third level cylinder 130) if in inspiration peak, this will cause high pressure stage cylinder gettering quantity deficiency, causes the decline of multistage compressor performance.Pass through the present embodiment, can make the compression chamber of cylinders at different levels air-breathing in the time of peak, first order cylinder 110 (second level cylinder 120) exhaust arrives or approaches exhaust peak, ensure continuity and connecting that exhausts at different levels and next stage are air-breathing, reduce pressure pulsation, improved multistage compressor performance.It should be noted that, what the "/" in the present embodiment represented is " division sign ".
Preferably, multi-stage cylinder 100 in the present embodiment is three-stage cylinder, multistage eccentric part is three grades of eccentric parts, three grades of eccentric parts are along the first order eccentric part 210 setting gradually in the axial direction of bent axle 200, second level eccentric part 220 and third level eccentric part 230, first order eccentric part 210, second level eccentric part 220 and third level eccentric part 230 and three cylinders 100 arrange correspondingly, in the time that bent axle 200 rotates, by the effect of three grades of eccentric parts, band dynamic air cylinder 100 is realized its compression function.It should be noted that, multistage compressor of the present utility model can also be set to level Four, Pyatyi, six grades etc. and four, five, six cylinders are set over the ground, as long as ensure between adjacent two-stage cylinder that phase difference in the air-breathing zero hour is within the scope of 120 ° to 240 °, here adjacent is that series is adjacent instead of refer to structural adjacent.
The utility model comprises following conventional embodiment; other by change eccentric part position angles of bent axle 200 or change cylinder vane slot position angle reaching " first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour within the scope of 120 ° to 240 °, second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour embodiment within the scope of 120 ° to 240 ° also within the scope of the utility model protection.
Below taking the multistage compressor with three-stage cylinder as example, introduce " first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour at 180 °, second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour at 180 ° " time bent axle and cylinder concrete structure:
Refer again to shown in Fig. 1, in the multistage compressor with three-stage cylinder, cylinder 100 comprises first order cylinder 110, second level cylinder 120 and third level cylinder 130, and first order cylinder 110 comprises the first intakeport 111 and first row gas port 112, second level cylinder 120 comprises the second intakeport 121 and second row gas port 122, third level cylinder 130 comprises the 3rd intakeport 131 and the 3rd relief opening 132, when work, now, in the axial direction of bent axle 200, be disposed with first order eccentric part 210, second level eccentric part 220 and third level eccentric part 230, first order eccentric part 210, second level eccentric part 220 and third level eccentric part 230 respectively with first order cylinder 110, second level cylinder 120 and third level cylinder 130 arrange correspondingly, when work, the periphery of each eccentric part is all arranged with roller 400, ensure that cylinders at different levels can realize it and compress normally, suction and discharge function.
In conjunction with shown in Fig. 2 to Fig. 6, in the first embodiment of the present utility model, multistage compressor is three grades of compressions, the eccentric direction of the second level eccentric part 220 of bent axle 200 is identical with the eccentric direction of first order eccentric part 210, the eccentric direction of third level eccentric part 230 is contrary with the eccentric direction of second level eccentric part 220, become 180 ° of distributions, second level eccentric part 220 is identical with the eccentric direction of first order eccentric part 210, become 0 ° of distribution, now, angle between the slide plate 300 of the second level cylinder 120 that the slide plate 300 of the first order cylinder 110 of first order eccentric part 210 correspondences and second level eccentric part 220 are corresponding is 180 °, thereby making second level cylinder 120 and first order cylinder 110 is 180 ° at the phase difference of the air-breathing zero hour.
Similarly, the eccentric direction of third level eccentric part 230 is contrary with the eccentric direction of second level eccentric part 220, become 180 ° of distributions, angle between the slide plate 300 of the second level cylinder 120 that the slide plate 300 of the third level cylinder 130 of third level eccentric part 230 correspondences and second level eccentric part 220 are corresponding is 0 °, is 180 ° thereby make third level cylinder 130 and second level cylinder 120 at the phase difference of the air-breathing zero hour.
Can know according to above-mentioned structure, the present embodiment by change the position of the eccentric part on bent axle 200 and the slide plate 300 in cylinder 100 make first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour at 180 °, second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour at 180 °, simple in structure, be easy to realize.
According to the second embodiment of the present utility model, a kind of multistage compressor is provided, the structure of the multistage compressor of the present embodiment and the first embodiment's multistage compressor is basically identical, difference is, in the present embodiment " first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour at 180 °; second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour at 180 ° " mode and first implements differently, the specific implementation of the present embodiment is as follows:
Referring to shown in Fig. 7 to Figure 11, the multistage compressor of the present embodiment is two-stage compression, the eccentric direction of the third level eccentric part 230 of bent axle 200 is identical with the eccentric direction of second level eccentric part 220, the eccentric direction of first order eccentric part 210 is contrary with the eccentric direction of second level eccentric part 220, become 180 ° of distributions, because the eccentric direction of second level eccentric part 220 becomes 180 ° of distributions with the eccentric direction of first order eccentric part 210, now, angle between the slide plate 300 of the second level cylinder 120 that the slide plate 300 of the first order cylinder 110 of first order eccentric part 210 correspondences and second level eccentric part 220 are corresponding is 0 °, thereby making second level cylinder 120 and first order cylinder 110 is 180 ° at the phase difference of the air-breathing zero hour.
Similarly, because of the eccentric direction of third level eccentric part 230 identical with the eccentric direction of second level eccentric part 220, become 0 ° of distribution, now, angle between the slide plate 300 of the second level cylinder 120 that the slide plate 300 of the third level cylinder 130 of setting third level eccentric part 230 correspondences and second level eccentric part 220 are corresponding is 180 °, is 180 ° thereby make third level cylinder 130 and second level cylinder 120 at the phase difference of the air-breathing zero hour.
According to the 3rd embodiment of the present utility model, a kind of multistage compressor is provided, the structure of the multistage compressor of the present embodiment and the first embodiment's multistage compressor is basically identical, difference is, in the present embodiment, realize " first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour at 180 °; second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour at 180 ° " mode is different with the first enforcement, the specific implementation of the present embodiment is as follows:
Referring to shown in Figure 12 to Figure 16, multistage compressor is three grades of compressions, the eccentric part of bent axle 200 becomes 180 ° to be interspersed, the eccentric direction that is designed to first order eccentric part 210 is contrary with the eccentric direction of second level eccentric part 220, become 180 °, the eccentric direction of second level eccentric part 220 is contrary with the eccentric direction of third level eccentric part 230, become 180 °, because the eccentric direction of second level eccentric part 220 becomes 180 ° now with the eccentric direction of third level eccentric part 230, angle between the slide plate 300 of the second level cylinder 120 that the slide plate 300 of the first order cylinder 110 of first order eccentric part 210 correspondences and second level eccentric part 220 are corresponding is 0 °, thereby making second level cylinder 120 and first order cylinder 110 is 180 ° at the phase difference of the air-breathing zero hour.
Similarly, because of the eccentric method phase of third level eccentric part 230 contrary with the eccentric direction of second level eccentric part 220, become 180 ° of distributions, now, angle between the slide plate 300 of the second level cylinder 120 that the slide plate 300 of the third level cylinder 130 of setting third level eccentric part 230 correspondences and second level eccentric part 220 are corresponding is 0 °, thereby making third level cylinder 130 and second level cylinder 120 is 180 ° at the phase difference of the air-breathing zero hour, reduces air-breathing pulsation excessive, improve multistage compressor performance.
According to the 4th embodiment of the present utility model, a kind of multistage compressor is provided, the structure of the multistage compressor of the present embodiment and the first embodiment's multistage compressor is basically identical, difference is, in the present embodiment, realize " first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour at 180 °; second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour at 180 ° " mode is different with the first enforcement, the specific implementation of the present embodiment is as follows:
Referring to shown in Figure 17 to Figure 21, multistage compressor is three grades of compressions, the eccentric part of bent axle 200 becomes 120 ° of uniform designs, specifically, in the time that bent axle 200 is rotated in a clockwise direction, the eccentric direction line of first order eccentric part 210 is 240 ° to the angle between the eccentric direction line of second level eccentric part 220, the eccentric direction line of second level eccentric part 220 is 240 ° to the angle between the eccentric direction line of third level eccentric part 230, now, the slide plate 300 of setting the first order cylinder 110 of first order eccentric part 210 correspondences is 60 ° (counterclockwise angle is 300 °) to the angle between the slide plate 300 of the second level cylinder 120 of second level eccentric part 220 correspondences, thereby making second level cylinder 120 and first order cylinder 110 is 180 ° at the phase difference of the air-breathing zero hour.
Similarly, in the time that bent axle 200 is rotated in a clockwise direction, because the eccentric direction line of second level eccentric part 220 is 240 ° to the angle between the eccentric direction line of third level eccentric part 230, the slide plate 300 of setting the second level cylinder 120 of second level eccentric part 220 correspondences is 60 ° (counterclockwise angle is 300 °) to the angle between the slide plate 300 of the third level cylinder 130 of third level eccentric part 230 correspondences, thereby making third level cylinder 130 and second level cylinder 120 is 180 ° at the phase difference of the air-breathing zero hour, reduce air-breathing pulsation excessive, improve multistage compressor performance.
According to the 5th embodiment of the present utility model, a kind of multistage compressor is provided, the structure of the multistage compressor of the present embodiment and the first embodiment's multistage compressor is basically identical, difference is, in the present embodiment, realize " first order cylinder 110 and second level cylinder 120 at the phase difference of the air-breathing zero hour at 180 °; second level cylinder 120 and third level cylinder 130 at the phase difference of the air-breathing zero hour at 180 ° " mode is different with the first enforcement, the specific implementation of the present embodiment is as follows:
Referring to shown in Figure 22 to Figure 26, multistage compressor is 2 grades of compressions, each eccentric part of bent axle 200 becomes 120 ° of uniform designs, specifically, in the time that bent axle 200 is rotated in a clockwise direction, the eccentric direction line of first order eccentric part 210 is 120 ° to the angle between the eccentric direction line of second level eccentric part 220, the eccentric direction line of second level eccentric part 220 is 120 ° to the angle between the eccentric direction line of third level eccentric part 230, now, the slide plate 300 of setting the first order cylinder 110 of first order eccentric part 210 correspondences is 300 ° (counterclockwise angle is 60 °) to the angle between the slide plate 300 of the second level cylinder 120 of second level eccentric part 220 correspondences, thereby making second level cylinder 120 and first order cylinder 110 is 180 ° at the phase difference of the air-breathing zero hour.
Similarly, in the time that bent axle 200 is rotated in a clockwise direction, because the eccentric direction line of second level eccentric part 220 is 120 ° to the angle between the eccentric direction line of third level eccentric part 230, the slide plate 300 of setting the second level cylinder 120 of second level eccentric part 220 correspondences is 60 ° (counterclockwise angle is 300 °) to the angle between the slide plate 300 of the third level cylinder 130 of third level eccentric part 230 correspondences, thereby making third level cylinder 130 and second level cylinder 120 is 180 ° at the phase difference of the air-breathing zero hour, reduce air-breathing pulsation excessive, improve multistage compressor performance.
It should be noted that, eccentric direction line in the present embodiment is defined as: the center of gravity of crossing eccentric part is made the vertical line perpendicular to the center line of bent axle 200, the focus of the central axis of this vertical line and bent axle 200 is A, now taking A point as starting point and cross the ray of eccentric part center of gravity as the eccentric center line of eccentric part.Similarly, the slide plate 300 of certain cylinder in the present embodiment and the slide plate 300 of another cylinder between angle refer to the angle between the center line line of two slide plates 300.The phase difference of the air-breathing zero hour is defined as: it is 0 ° that one-level cylinder starts air-breathing, and when one-level compression chamber rotates to A °, secondary cylinder starts air-breathing, and A ° is the phase difference of one-level cylinder and secondary cylinder air-breathing zero hour.
Can know according to the above embodiments, multistage compressor of the present utility model can reduce the exhausts at different levels of multiple cylinder multiple level multistage compressor and air-breathing continuity and the smoothness of next stage, avoid gas accumulation at different levels in intermediate cavity, cause intermediate cavity overpressure, reduce intermediate cavity pressure pulsation, improve circulation effect, simplify suction and discharge circulation passage and improve multistage compressor performance.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. a multistage compressor, it is characterized in that, comprise bent axle (200) and multi-stage cylinder (100), in the axial direction of described bent axle (200), be provided with multistage eccentric part, described multistage eccentric part and described multi-stage cylinder (100) arrange correspondingly, first order cylinder (110) and second level cylinder (120) at the phase difference of the air-breathing zero hour within the scope of 120 ° to 240 °, described second level cylinder (120) and third level cylinder (130) at the phase difference of the air-breathing zero hour within the scope of 120 ° to 240 °.
2. multistage compressor according to claim 1, it is characterized in that, in the time of pressure of inspiration(Pi)≤2 of the exhaust pressure/described first order cylinder (110) of described second level cylinder (120), described first order cylinder (110) and described second level cylinder (120) at the phase difference of the air-breathing zero hour within the scope of 120 ° to 180 °;
In the time of pressure of inspiration(Pi)≤2 of exhaust pressure/described second level cylinder (120) of described third level cylinder (130), described second level cylinder (120) and described third level cylinder (130) at the phase difference of the air-breathing zero hour within the scope of 120 ° to 180 °.
3. multistage compressor according to claim 1, it is characterized in that, in the time of the pressure of inspiration(Pi) >2 of exhaust pressure/first order cylinder (110) of second level cylinder (120), described first order cylinder (110) and described second level cylinder (120) at the phase difference of the air-breathing zero hour within the scope of 180 ° to 240 °;
In the time of the pressure of inspiration(Pi) >2 of exhaust pressure/described second level cylinder (120) of described third level cylinder (130), described second level cylinder (120) and described third level cylinder (130) at the phase difference of the air-breathing zero hour within the scope of 180 ° to 240 °.
4. according to the multistage compressor described in any one in claims 1 to 3, it is characterized in that, described multi-stage cylinder (100) is three-stage cylinder, described multistage eccentric part is three grades of eccentric parts, described three grades of eccentric parts are along the first order eccentric part (210) setting gradually in the axial direction of described bent axle (200), second level eccentric part (220) and third level eccentric part (230), described first order eccentric part (210), described second level eccentric part (220) and described third level eccentric part (230) arrange correspondingly with described three-stage cylinder.
5. multistage compressor according to claim 4, it is characterized in that, the eccentric direction of described first order eccentric part (210) is contrary with the eccentric direction of described second level eccentric part (220), and the eccentric direction of described second level eccentric part (220) is identical with the eccentric direction of described third level eccentric part (230);
Angle between the slide plate (300) of the described second level cylinder (120) that the slide plate (300) of the described first order cylinder (110) that described first order eccentric part (210) is corresponding and described second level eccentric part (220) are corresponding is 0 °, and the angle between the slide plate (300) of the described second level cylinder (120) that the slide plate (300) of the described third level cylinder (130) that described third level eccentric part (230) is corresponding and described second level eccentric part (220) are corresponding is 180 °.
6. multistage compressor according to claim 4, it is characterized in that, the eccentric direction of described first order eccentric part (210) is contrary with the eccentric direction of described second level eccentric part (220), and the eccentric direction of described second level eccentric part (220) is contrary with the eccentric direction of described third level eccentric part (230);
Angle between the slide plate (300) of the described second level cylinder (120) that the slide plate (300) of the described first order cylinder (110) that described first order eccentric part (210) is corresponding and described second level eccentric part (220) are corresponding is 0 °, and the angle between the slide plate (300) of the described second level cylinder (120) that the slide plate (300) of the described third level cylinder (130) that described third level eccentric part (230) is corresponding and described second level eccentric part (220) are corresponding is 0 °.
7. multistage compressor according to claim 4, it is characterized in that, the eccentric direction of described first order eccentric part (210) is identical with the eccentric direction of described second level eccentric part (220), and the eccentric direction of described second level eccentric part (220) is contrary with the eccentric direction of described third level eccentric part (230);
Angle between the slide plate (300) of the described second level cylinder (120) that the slide plate (300) of the described first order cylinder (110) that described first order eccentric part (210) is corresponding and described second level eccentric part (220) are corresponding is 180 °, and the angle between the slide plate (300) of the described second level cylinder (120) that the slide plate (300) of the described third level cylinder (130) that described third level eccentric part (230) is corresponding and described second level eccentric part (220) are corresponding is 0 °.
8. multistage compressor according to claim 4, is characterized in that, the sense of rotation along described bent axle (200):
The eccentric direction line of described first order eccentric part (210) is 240 ° to the angle between the eccentric direction line of described second level eccentric part (220), and the eccentric direction line of described second level eccentric part (220) is 240 ° to the angle between the eccentric direction line of described third level eccentric part (230);
The slide plate (300) of the described first order cylinder (110) that described first order eccentric part (210) is corresponding is 60 ° to the angle between the slide plate (300) of described second level cylinder (120) corresponding to described second level eccentric part (220), and the slide plate (300) of the described second level cylinder (120) that described second level eccentric part (220) is corresponding is 60 ° to the angle between the slide plate (300) of described third level cylinder (130) corresponding to described third level eccentric part (230).
9. multistage compressor according to claim 4, is characterized in that, the sense of rotation along described bent axle (200):
The eccentric direction line of described first order eccentric part (210) is 120 ° to the angle between the eccentric direction line of described second level eccentric part (220), and the eccentric direction line of described second level eccentric part (220) is 120 ° to the angle between the eccentric direction line of described third level eccentric part (230);
The slide plate (300) of the described first order cylinder (110) that described first order eccentric part (210) is corresponding is 300 ° to the angle between the slide plate (300) of described second level cylinder (120) corresponding to described second level eccentric part (220), and the slide plate (300) of the described second level cylinder (120) that described second level eccentric part (220) is corresponding is 300 ° to the angle between the slide plate (300) of described third level cylinder (130) corresponding to described third level eccentric part (230).
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| CN201420295304.0U CN203867899U (en) | 2014-06-04 | 2014-06-04 | Multistage compressor |
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| CN201420295304.0U CN203867899U (en) | 2014-06-04 | 2014-06-04 | Multistage compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728089A (en) * | 2015-03-26 | 2015-06-24 | 广东美芝制冷设备有限公司 | Three-stage compressor and refrigeration equipment with same |
| CN105134596A (en) * | 2014-06-04 | 2015-12-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Multistage compressor |
-
2014
- 2014-06-04 CN CN201420295304.0U patent/CN203867899U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134596A (en) * | 2014-06-04 | 2015-12-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Multistage compressor |
| CN105134596B (en) * | 2014-06-04 | 2019-05-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Compound compressor |
| CN104728089A (en) * | 2015-03-26 | 2015-06-24 | 广东美芝制冷设备有限公司 | Three-stage compressor and refrigeration equipment with same |
| CN104728089B (en) * | 2015-03-26 | 2017-09-19 | 广东美芝制冷设备有限公司 | Three-stage blower and the refrigeration plant with it |
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