CN203962430U - Cantilever centrifugal compressor - Google Patents

Abstract

The utility model discloses a kind of cantilever centrifugal compressor, comprise: housing, motor, driven the impeller of rotation by described motor, transmitting assemblies and about the symmetrical lubricant passage way system of vertical plane, the output shaft of motor is supported in housing by two clutch shaft bearings that are axially spaced apart from each other along it, transmitting assemblies is connected with output shaft, the transmission shaft of transmitting assemblies by two the second bearings being axially spaced apart from each other along it in housing, impeller set is located on transmission shaft, wherein transmission shaft and output shaft are positioned at same vertical plane, lubricant passage way system is located in housing, lubricant passage way system is for being lubricated two clutch shaft bearings and two the second bearings respectively.According to cantilever centrifugal compressor of the present utility model, center of gravity is positioned on median plane, and stability is high, compact structure, takes up room little, support housing simple in structure, lubricant passage way system is simple, and lubricating efficiency is high, reliability is high, and that the processing and assembling of transmitting assemblies requires is low, cost is low.

Description

Cantilever centrifugal compressor

Technical field

The utility model relates to art of refrigeration units, especially relates to a kind of cantilever centrifugal compressor.

Background technique

In correlation technique, point out, the structure of traditional cantilever centrifugal compressor is compact not, take up room larger, and deviation of gravity center median plane, the complex structure of support housing, lubricant passage way system complexity, efficiency are low, and that the processing and assembling of transmitting assemblies requires is high, cost is high.

Model utility content

The utility model is intended at least solve one of technical problem existing in prior art.For this reason, the purpose of this utility model is to propose a kind of cantilever centrifugal compressor, the compact structure of described cantilever centrifugal compressor, take up room little, lubricant passage way system is simple, lubricating efficiency is high, the processing and assembling of transmitting assemblies requires low, cost of production is low.

According to cantilever centrifugal compressor of the present utility model, comprising: housing; Motor, described motor has output shaft, and described output shaft is supported in described housing by two clutch shaft bearings that are axially spaced apart from each other along it; Driven the impeller of rotation by described motor; Transmitting assemblies, described transmitting assemblies is connected with described output shaft, described transmitting assemblies has transmission shaft, described transmission shaft by two the second bearings being axially spaced apart from each other along it in described housing, described impeller set is located on described transmission shaft, and wherein said transmission shaft and described output shaft are positioned at same vertical plane; And about the symmetrical lubricant passage way system of described vertical plane, described lubricant passage way system is located in described housing, described lubricant passage way system is for being lubricated described two clutch shaft bearings and described two the second bearings respectively.

According to cantilever centrifugal compressor of the present utility model, center of gravity is positioned on median plane, and stability is high, compact structure, takes up room little, support housing simple in structure, lubricant passage way system is simple, and lubricating efficiency is high, reliability is high, and that the processing and assembling of transmitting assemblies requires is low, cost is low.

Particularly, described output shaft is positioned at the top of described transmission shaft, wherein said lubricant passage way system comprises: fuel supply chamber, and described fuel supply chamber is positioned at the top of described output shaft, and wherein said fuel supply chamber is delivered to respectively described two clutch shaft bearings by oil supply gallery by lubricant oil; Communicating passage, described communicating passage is located between at least one and described two the second bearings in described two clutch shaft bearings, so that the described described lubricant oil at least one in described two clutch shaft bearings is delivered to described two the second bearings; And oil back chamber, described oil back chamber is positioned at the below of described transmission shaft, and the described lubricant oil on wherein said two clutch shaft bearings and described two the second bearings is back to described oil back chamber by drainback passage.Thus, can effectively improve lubricating efficiency and lubricated reliability.

Further, described oil back chamber comprises the first oil back chamber and the second oil back chamber, before and after described the first oil back chamber and the second oil back chamber, communicate with each other, lubricant oil on wherein said two clutch shaft bearings is back in described the first oil back chamber, and the lubricant oil on described two the second bearings is back in described the second oil back chamber.Thus, can effectively improve the reliability of oil return efficiency and oil return.

Further, described cantilever centrifugal compressor further comprises: oil pump, and described oil pump is located on described housing, and the filler opening of described oil pump is communicated with described oil back chamber, and the oil outlet of described oil pump is communicated with described fuel supply chamber.Thus, can effectively improve the reliability of lubricated cycle efficiency and lubricated circulation.

Particularly, described housing comprises: case, is formed with suction port on described case; Spiral case, described spiral case is located at a side of described case, and wherein said impeller is located in described spiral case; Support housing, described support housing is located at the side away from described case of described spiral case, and limits receiving cavity between described spiral case and described support housing, and the described output shaft of wherein said transmission shaft and described motor is all supported in described support housing; And dividing plate, described dividing plate is located between described spiral case and described support housing with isolated front chamber before and after described receiving cavity is separated into and rear chamber, described rear chamber is communicated with described suction port, and the free end of wherein said output shaft is positioned at described rear chamber below.Thus, greatly simplify the structure of housing, improved processing and efficiency of assembling, reduced and become to produce cost.

Further, in described rear chamber, be provided with oil mist separator, described oil mist separator is provided with import, oil outlet and air outlet, and described import and described oil outlet are communicated with described front chamber, and described air outlet is communicated with described rear chamber.

Alternatively, described oil mist separator is that two and described two oil mist separators are symmetrically arranged about described vertical plane.Thus, can effectively improve the reliability that mist of oil separation effect and mist of oil separate.

Further, described rear chamber is communicated with by balance tube with described suction port, and described balance tube is symmetrical about described vertical plane.Thus, improve gas flow efficiency in balance tube, ensured that the air pressure of rear chamber and suction port is often in state of equilibrium.

Preferably, described support housing is symmetrical about described vertical plane.Thus, further simplified the structure of housing.

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

Brief description of the drawings

Fig. 1 is according to the sectional drawing of the utility model embodiment's cantilever centrifugal compressor;

Fig. 2 is the sectional drawing along A-A line in Fig. 1;

Fig. 3 is the sectional drawing along B-B line in Fig. 1.

Reference character:

100: cantilever centrifugal compressor;

11: case; 111: suction port; 112: the first balancing air holes;

12: spiral case;

13: support housing; 131: repairing path; 132: the second balancing air holes;

14: dividing plate;

151: front chamber; 152: rear chamber;

2: motor; 21: output shaft; 211: clutch shaft bearing;

3: impeller;

4: transmitting assemblies; 41: transmission shaft; 411: the second bearings; 42: gear;

51: fuel supply chamber;

52: oil back chamber; 521: the first oil back chambers; 522: the second oil back chambers;

53: oil supply gallery; 531: the first for oil circuit; 532: the second for oil circuit; 533: the three for oil circuit;

54: communicating passage; 541: the first access; 542: the second access; 543: third connecting road;

551: the first oil return ponds; 552: the second oil return ponds; 553: the second spill ports;

6: oil pump; 7: oil mist separator; 8: balance tube.

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.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

The orientation of the instructions such as the term hereinafter mentioned " " center ", " longitudinally ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward " or position relationship are for based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; instead of the device of instruction or hint indication or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.

Describe according to the utility model embodiment's cantilever centrifugal compressor 100 below with reference to Fig. 1-Fig. 3.

As shown in Figure 1, according to the utility model embodiment's cantilever centrifugal compressor 100, comprising: housing and be located at motor 2, impeller 3, transmitting assemblies 4 and the lubricant passage way system in housing.

Particularly, as shown in Figure 1, motor 2 has output shaft 21, transmitting assemblies 4 has transmission shaft 41, output shaft 21 is supported in housing by two clutch shaft bearings 211 that are axially spaced apart from each other along it, transmission shaft 41 is supported in housing by two the second bearings 411 that are axially spaced apart from each other along it, transmitting assemblies 4 is connected with output shaft 21, alternatively, output shaft 21 is positioned at the top of transmission shaft 41, and transmission shaft 41 is positioned at same vertical plane with output shaft 21, lubricant passage way system is symmetrical about this vertical plane, for respectively two clutch shaft bearings 211 and two the second bearings 411 being lubricated.

With reference to Fig. 1, housing is formed as symmetrical structure substantially, motor 2 is located at the back upper place in housing, transmitting assemblies 4 is located at the front lower place in housing, output shaft 21 horizontal-extending from back to front of motor 2, transmitting assemblies 4 comprises transmission shaft 41 and gear 42, transmission shaft 41 is along fore-and-aft direction horizontal-extending, gear 42 is set in output shaft 21 front ends and cooperatively interacts with transmission shaft 41, wherein, the axis of the axis of output shaft 21 and transmission shaft 41 is all located on the longitudinal median plane of housing, thereby the output shaft of motor 2 21 is symmetrical about the longitudinal median plane of housing respectively with transmitting assemblies 4.Alternatively, transmission shaft 41 can be gear shaft, and the rear portion of transmission shaft 41 can have and gear 42 pitch wheel portions, thereby output shaft 21 can drive transmission shaft 41 to rotate by gear 42.Thus, convenient processing and assembling, reduced cost of production.

Further, impeller 3 is set on transmission shaft 41 and by motor 2 and drives rotation.As shown in Figure 1, front portion in housing is formed with multiple compression chambers, the front end sleeve of transmission shaft 41 is provided with the isolated impeller 3 in multiple front and back, multiple impellers 3 are engaged in multiple compression chambers correspondingly, like this, in the time that output shaft 21 drives transmission shaft 41 to rotate by gear 42, transmission shaft 41 can drive the multiple impellers 3 on it to rotate, to make multiple impellers 3 compress respectively the refrigerant in corresponding compression chamber.Certainly, the utility model is not limited to this, on transmission shaft 41, can also only be provided with an impeller 3.

Like this, because multiple impellers 3 are set on the symmetrical transmission shaft 41 of longitudinal median plane about housing, and housing, transmitting assemblies 4 and motor 2 are symmetrical about the longitudinal median plane of housing respectively, thereby the center of gravity of cantilever centrifugal compressor 100 can be positioned on central plane, thereby structure stability and the working stability of cantilever centrifugal compressor 100 are effectively improved.

With reference to Fig. 1, lubricant passage way system is about the longitudinal median plane symmetry of housing, and lubricant passage way system is communicated with two clutch shaft bearings 211 and two the second bearings 411, because the output shaft 21 of motor 2 is symmetrical about the longitudinal median plane of housing respectively with transmitting assemblies 4, and output shaft 21 and transmission shaft 41 are rotatably supported in housing by two clutch shaft bearings 211 and two the second bearings 411 respectively, thereby two clutch shaft bearings 211 and two the second bearings 411 are symmetrical about the longitudinal median plane of housing respectively, like this, two clutch shaft bearings 211 and two the second bearings 411 by employing about the lubricated longitudinal median plane symmetry about housing of lubricant passage way system of the longitudinal median plane symmetry of housing, thereby can effectively improve lubricating efficiency and the reliability of two clutch shaft bearings 211 and two the second bearings 411.

According to the utility model embodiment's cantilever centrifugal compressor 100, center of gravity is positioned on median plane, stability is high, compact structure, take up room little, support housing 13 simple in structure, lubricant passage way system is simple, lubricating efficiency is high, reliability is high, and that the processing and assembling of transmitting assemblies 4 requires is low, cost is low.

In an embodiment of the present utility model, with reference to Fig. 1, housing comprises: case 11, spiral case 12, support housing 13 and dividing plate 14, wherein, spiral case 12 is located at a side (example is rear side as shown in Figure 1) of case 11, and support housing 13 is located at the side (example is rear side as shown in Figure 1) away from case 11 of spiral case 12.Alternatively, support housing 13 is symmetrical structure.

With reference to Fig. 1 and in conjunction with Fig. 3, case 11, spiral case 12, support housing 13 connects from front to back in turn, wherein the rear end of case 11 is connected with the front end of spiral case 12, the rear end of spiral case 12 is connected with the front end of support housing 13, wherein, on case 11, be formed with the suction port 111 running through along fore-and-aft direction, in spiral case 12, limit the compression chamber being connected with suction port 111, impeller 3 is located in compression chamber, between spiral case 12 and support housing 13, limit receiving cavity, dividing plate 14 is located between spiral case 12 and support housing 13 with isolated front chamber 151 before and after receiving cavity is separated into and rear chamber 152, wherein, dividing plate 14 is located at the front-end face place on support housing 13 tops, thereby rear chamber 152 is positioned at the rear side of dividing plate 14, and be located at the top of support housing 13, front chamber 151 is positioned at front side and the below of dividing plate 14, and be located at the rear portion of spiral case 12 and the bottom of support housing 13.

Further, with reference to Fig. 1, two clutch shaft bearings 211 are located at the superior posterior in support housing 13, two the second bearings 411 are located at the front middle part in support housing 13, thereby transmission shaft 41 and output shaft 21 are supported in support housing 13 by two clutch shaft bearings 211 and two the second bearings 411 respectively, and the free end of gear 42 and output shaft 21 (example is front end as shown in Figure 1) is all positioned at the below of rear chamber 152, two the second bearings 411 are all positioned at front chamber 151.Thus, locate the reasons such as lubricated and interior leakage because lubricant passage way system and transmitting assemblies 4 coordinate with impeller 3, motor 2 etc., the interior meeting of front chamber 151 contains gas mixture.

Alternatively, with reference to Fig. 1, lubricant passage way system comprises: fuel supply chamber 51, oil back chamber 52, oil supply gallery 53, communicating passage 54 and drainback passage, wherein, fuel supply chamber 51 is positioned at the top of output shaft 21, oil back chamber 52 is positioned at the below of transmission shaft 41, and oil back chamber 52 comprises that the first oil back chamber 521 and the second oil back chamber 522, the first oil back chambers 521 and the second oil back chamber 522 front and back communicate with each other.

As shown in Figure 1, fuel supply chamber 51 is formed on the center at the top of support housing 13, and the rear surface of self-supporting housing 13 is recessed forward, fuel supply chamber 51 is symmetrical about the longitudinal median plane of support housing 13, due to output shaft 21 and two clutch shaft bearings 211 also symmetrical about the longitudinal median plane of support housing 13, thereby fuel supply chamber 51 can be positioned at output shaft 21 directly over, further, the first oil back chamber 521 and the second oil back chamber 522 all belong to a part for front chamber 151 and are interconnected, wherein, the first oil back chamber 521 is formed on the center of the bottom of support housing 13, and the front surface of self-supporting housing 13 is to being recessed into, the first oil back chamber 521 is symmetrical about the longitudinal median plane of support housing 13, the second oil back chamber 522 is formed on the center of the bottom of spiral case 12, and the rear surface from spiral case 12 is recessed from back to front, the second oil back chamber 522 is also symmetrical about the longitudinal median plane of support housing 13, due to transmission shaft 41 and two the second bearings 411 also symmetrical about the longitudinal median plane of support housing 13, thereby the first oil back chamber 521 and the second oil back chamber 522 can be positioned at transmission shaft 41 under.

Further, fuel supply chamber 51 is delivered to respectively two clutch shaft bearings 211 by oil supply gallery 53 by lubricant oil.As shown in Figure 1, on the periphery wall of two clutch shaft bearings 211, be formed with respectively the annular oil storage tank inwardly concaving, oil supply gallery 53 comprises: first for oil circuit 531, second supplies oil circuit 533 for oil circuit 532 and the 3rd, wherein first connect straight down to the oil storage tank of the clutch shaft bearing 211 of front side from the center of fuel supply chamber 51 anterior diapires for oil circuit 531, second connects to the clutch shaft bearing 211 of rear side from the middle part of the first oil supply gallery 53 backward for oil circuit 532, the 3rd connects to the oil storage tank of the clutch shaft bearing 211 of rear side for the rear end of oil circuit 532 from second straight down for oil circuit 533.

Thus, lubricant oil in fuel supply chamber 51 can be along the first clutch shaft bearing 211 for oil circuit 531 lubricated front sides, first further supplies oil circuit 533 to lubricate the clutch shaft bearing 211 of rear sides by second for oil circuit 532 and the 3rd for the lubricant oil in oil circuit 531, like this due to fuel supply chamber 51, first for oil circuit 531, second for oil circuit 532, the 3rd supplies oil circuit 533 and output shaft 21 and two clutch shaft bearings 211 all symmetrical about the longitudinal median plane of support housing 13, thereby lubricant oil can be symmetrical, lubricate in time and fully two clutch shaft bearings 211, and then lubricating efficiency and lubricated reliability are effectively improved.

Communicating passage 54 is located between at least one and two the second bearings 411 in two clutch shaft bearings 211, so that the lubricant oil at least one in two clutch shaft bearings 211 is delivered to two the second bearings 411.As shown in Figure 1, on the periphery wall of two the second bearings 411, be formed with respectively the annular oil storage tank inwardly concaving, communicating passage 54 comprises: the first access 541, the second access 542 and third connecting road 543, wherein the first access 541 from support housing 13 be positioned at the clutch shaft bearing 211 of front side oil storage tank under surface connect straight down to the oil storage tank of the second bearing 411 of rear side, the second access 542 first from support housing 13 be positioned at the second bearing 411 of rear side oil storage tank under surface connect straight down, and then horizontal forward perforation is to the second bearing 411 of front side, third connecting road 543 connects to the oil storage tank of the second bearing 411 of front side straight up from the front end of the second access 542.

Thus, lubricant oil in the clutch shaft bearing 211 of front side can be along the second bearing 411 of the first access 541 lubricated rear sides, lubricant oil in the second bearing 411 of rear side can be along the second bearing 411 of the second access 542 and 543 lubricated front sides, third connecting road, like this due to the first access 541, the second access 542, third connecting road 543 and transmission shaft 41 and two the second bearings 411 are all symmetrical about the longitudinal median plane of support housing 13, thereby lubricant oil can be symmetrical, lubricate in time and fully two the second bearings 411, and then lubricating efficiency and lubricated reliability are effectively improved.

Lubricant oil on two clutch shaft bearings 211 and two the second bearings 411 is back to oil back chamber 52 by drainback passage, particularly, lubricant oil on two clutch shaft bearings 211 is back in the first oil back chamber 521, and the lubricant oil on two the second bearings 411 is back in the second oil back chamber 522.With reference to Fig. 1 and in conjunction with Fig. 2, drainback passage comprises: first time by pond 551, second time by pond 552, the first spill port (scheming not shown) and the second spill port 553, wherein, be formed on support housing 13 by pond 551 for first time, and first time by pond 551 below between the rear side of transmission shaft 41 and two clutch shaft bearings 211, there is by between pond 551 and two clutch shaft bearings 211 and output shaft 21 path being communicated with first time, the first spill port (scheming not shown) runs through a part for support housing 13 along the vertical direction, and be communicated with first time by pond 551 and the first oil back chamber 521.Thus, on two clutch shaft bearings 211 and output shaft 21, the lubricant oil of ejection can enter into first time by pond 551 by path, and then flows into the first oil back chamber 521 by the first spill port (scheming not shown).Certainly, the utility model is not limited to this, and the lubricant oil that transmission shaft 41, gear 42 and the second bearing 411 throw away also likely enters first time by pond 551 and flows into the first oil back chamber 521 by the first spill port (scheming not shown).

Further, with reference to Fig. 1, be formed on support housing 13 by pond 552 for second time, and second time by pond 552 under transmission shaft 41 and between two the second bearings 411, the second spill port 553 runs through a part for support housing 13 along the vertical direction, and be communicated with second time by pond 552 and the second oil back chamber 522, thus, on two the second bearings 411, transmission shaft 41 and gears 42, the lubricant oil of ejection can enter into second time by pond 552, and then flows into the second oil back chamber 522 by the second spill port 553.Certainly, the utility model is not limited to this, and the lubricant oil that output shaft 21 and the second bearing 411 throw away also likely enters second time and flows into the second oil back chamber 522 by pond 552 and by the second spill port 553.

Alternatively, the first spill port (scheming not shown) and the second spill port 553 can be respectively two, and two the first spill ports (scheming not shown) are symmetrical about the longitudinal median plane of support housing 13 respectively with two the second spill ports 553.In addition, first time by pond 551, second time by pond 552, also can be symmetrical about the longitudinal median plane of support housing 13 respectively, can be symmetrical and flow back in time oil back chamber 52 thereby lubricant oil completes after lubricated work, and then effectively improved the reliability of oil return efficiency and oil return.

Cantilever centrifugal compressor 100 further comprises: oil pump 6, and oil pump 6 is located on housing, and the filler opening of oil pump 6 is communicated with oil back chamber 52, and the oil outlet of oil pump 6 is communicated with fuel supply chamber 51.As shown in Figure 1, oil pump 6 is located on support housing 13 and the front portion of oil pump 6 is stretched in oil back chamber 52, filler opening is formed on stretching in the part in oil back chamber 52 of oil pump 6, so that oil pump 6 is from the interior oil pumping of oil back chamber 52, the center at the top of support housing 13 is formed with the repairing path 131 that runs through and be communicated with fuel supply chamber 51 from support housing 13 roofs downwards, oil pump 6 has transport pipe (scheming not shown), transport pipe is located at the outside of compressor, and the two ends of transport pipe are connected to respectively oil outlet and the repairing path 131 of oil pump 6.Thus, oil pump 6 can be withdrawn into the lubricant oil in support housing 13 bottom oil return chambeies 52 in the fuel supply chamber 51 at support housing 13 tops, to supplement in time the lubricant oil in fuel supply chamber 51, meets the requirement of circulating lubrication.Alternatively, oil pump 6 can be symmetrical set about the longitudinal median plane of support housing 13, and the filler opening of oil pump 6 is preferably located at the center of the bottom of oil pump 6, thereby has further improved working efficiency and the functional reliability of oil pump 6.

Thus, by the symmetrical lubricant passage way system of longitudinal median plane about support housing 13 is set, thereby effectively improved lubricating efficiency, oil return efficiency and circulating lubrication efficiency, and then improved the functional reliability of cantilever centrifugal compressor 100.

Further, with reference to Fig. 2, be provided with oil mist separator 7 in rear chamber 152, oil mist separator 7 is provided with import, oil outlet and air outlet, and import and oil outlet are communicated with front chamber 151, and air outlet is communicated with rear chamber 152.That is to say, now rear chamber 152 and front chamber 151 are by oil mist separator 7 conductings, and oil mist separator 7 has the effect of the mixture of mist of oil and gas being carried out to mist of oil separation.In concrete example of the present utility model, rear chamber 152 and front chamber 151 are the space of symmetrical relative closure.

Particularly, in cantilever centrifugal compressor 100 runnings, in front chamber 151, can produce lubricant mist, because of reasons such as lubricated and interior leakages, the refrigerant that enters into front chamber 151 mixes with lubricant mist, produce the mixture of mist of oil and gas, now enter into mixed gas mixture in front chamber 151 first carries out mist of oil for the first time and separates to isolate the lubricant oil that particle diameter is larger under the effect of gravity, enter into oil mist separator 7 through the refrigerant that mist of oil separates for the first time by import and carry out mist of oil separation for the second time, in oil mist separator 7, isolated lubricant oil is drained in front chamber 151 by oil outlet under Action of Gravity Field, be drained in rear chamber 152 through air outlet through the refrigerant that mist of oil separates for the second time, the mist of oil mixture now entering in rear chamber 152 can carry out mist of oil separation for the third time under the effect of gravity, isolated lubricant oil flows back to front chamber 151 through oil mist separator 7.

As shown in Figure 2, oil mist separator 7 can be two, thereby can reduce the flow velocity that enters into the refrigerant of oil mist separator 7 from front chamber 151, increase the waiting time of refrigerant in front chamber 151 and oil mist separator 7, further improve the mist of oil separating effect of refrigerant.Preferably, two oil mist separators 7 are symmetrical set, thereby the flow that can ensure the refrigerant that enters into two oil mist separators 7 is identical, further ensure the mist of oil separating effect of refrigerant, by adopting symplex structure design, can make the built-in space of two oil mist separators 7 little and compact simultaneously.Thus, improved the mist of oil separation effect of refrigerant.

Further, rear chamber 152 is communicated with suction port 111, and rear chamber 152 is communicated with by balance tube 8 with suction port 111, and balance tube 8 is symmetrical about support housing 13.As shown in Figure 1, the center of case 11 roofs is formed with the first balancing air holes 112 of downward perforation, the first balancing air holes 2112 is communicated to suction port 111, the center of support housing 13 roofs is formed with the second balancing air holes 132 running through downwards, the second balancing air holes 13 be communicated to rear chamber's 152, the first balancing air holes 112 and the second balancing air holes 132 symmetrical about the longitudinal median plane of support housing 13 respectively.

As shown in Figure 1, balance tube 8 is located at the top of housing, and the two ends of balance tube 8 connect respectively the first balancing air holes 112 and the second balancing air holes 132, thereby balance tube 8 is symmetrical about the longitudinal median plane of support housing 13.Thus, the interior isolated gaseous coolant of rear chamber 152 can flow back into suction port 111 by balance tube 8, not only active balance the pressure between rear chamber 152 and front chamber 151 and suction port 111, also separated the gas mixture in front chamber 151 simultaneously, lubricant oil is stayed in front chamber 151, met the requirement of product reliable operation.

Wherein, what need to describe is, impeller 3, oil mist separator 7, transmission system can adopt impeller 3, oil mist separator 7 and the transmission system in cantilever centrifugal compressor of the prior art, therefore just the structure of impeller 3, oil mist separator 7 and transmission system are not specifically limited here.

Below with reference to Fig. 1 and in conjunction with Fig. 2 and Fig. 3, briefly introduce the working procedure of cantilever centrifugal compressor 100:

In the running of compressor, transmitting assemblies 4 rotates and transferring power under the driving of motor 2, thereby drives impeller 3 is compressed the refrigerant in compression chamber, transmission shaft 41 is supported by two the second bearings 411 that are arranged on support housing 13, output shaft is supported by two clutch shaft bearings 211 that are arranged on support housing 13, lubricant passage way system provides circulating lubricating oil to clutch shaft bearing 211 and the second bearing 411, particularly, lubricant oil in fuel supply chamber 51 is delivered to clutch shaft bearing 211 by oil supply gallery 53 and communicating passage 54 and the second bearing 411 is lubricated, and then get back in oil back chamber 52 by drainback passage 55, oil pump 6 is delivered to the lubricant oil in oil back chamber 52 in fuel supply chamber 51, thereby complete lubricated circulation, in lubricated cyclic process, oil back chamber 52 is interior can produce a large amount of gas mixtures, the mist of oil piece-rate system being arranged symmetrically with will separate gas mixture, and the lubricant oil after separating is deposited in oil back chamber 52, gas after separating is delivered in front chamber 151, and be delivered to the suction port 111 of cantilever centrifugal compressor 100 by balance tube 8, thereby completing mist of oil separates.

In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction 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 " multiple " 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 integral; 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 " 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.

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, specific features, structure, material or the feature of description can one or more embodiments in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiments that describe in this specification or example and different embodiment or example.

Claims (9)

1. a cantilever centrifugal compressor, is characterized in that, comprising:

Housing;

Motor, described motor has output shaft, and described output shaft is supported in described housing by two clutch shaft bearings that are axially spaced apart from each other along it;

Driven the impeller of rotation by described motor;

Transmitting assemblies, described transmitting assemblies is connected with described output shaft, described transmitting assemblies has transmission shaft, described transmission shaft by two the second bearings being axially spaced apart from each other along it in described housing, described impeller set is located on described transmission shaft, and wherein said transmission shaft and described output shaft are positioned at same vertical plane; And

About the symmetrical lubricant passage way system of described vertical plane, described lubricant passage way system is located in described housing, and described lubricant passage way system is for being lubricated described two clutch shaft bearings and described two the second bearings respectively.

2. cantilever centrifugal compressor according to claim 1, is characterized in that, described output shaft is positioned at the top of described transmission shaft, and wherein said lubricant passage way system comprises:

Fuel supply chamber, described fuel supply chamber is positioned at the top of described output shaft, and wherein said fuel supply chamber is delivered to respectively described two clutch shaft bearings by oil supply gallery by lubricant oil;

Communicating passage, described communicating passage is located between at least one and described two the second bearings in described two clutch shaft bearings, so that the described described lubricant oil at least one in described two clutch shaft bearings is delivered to described two the second bearings; And

Oil back chamber, described oil back chamber is positioned at the below of described transmission shaft, and the described lubricant oil on wherein said two clutch shaft bearings and described two the second bearings is back to described oil back chamber by drainback passage.

3. cantilever centrifugal compressor according to claim 2, it is characterized in that, described oil back chamber comprises the first oil back chamber and the second oil back chamber, before and after described the first oil back chamber and the second oil back chamber, communicate with each other, lubricant oil on wherein said two clutch shaft bearings is back in described the first oil back chamber, and the lubricant oil on described two the second bearings is back in described the second oil back chamber.

4. cantilever centrifugal compressor according to claim 2, is characterized in that, further comprises:

Oil pump, described oil pump is located on described housing, and the filler opening of described oil pump is communicated with described oil back chamber, and the oil outlet of described oil pump is communicated with described fuel supply chamber.

5. according to the cantilever centrifugal compressor described in any one in claim 1-4, it is characterized in that, described housing comprises:

Case, is formed with suction port on described case;

Spiral case, described spiral case is located at a side of described case, and wherein said impeller is located in described spiral case;

Support housing, described support housing is located at the side away from described case of described spiral case, and limits receiving cavity between described spiral case and described support housing, and the described output shaft of wherein said transmission shaft and described motor is all supported in described support housing; And

Dividing plate, described dividing plate is located between described spiral case and described support housing with isolated front chamber before and after described receiving cavity is separated into and rear chamber, described rear chamber is communicated with described suction port, and the free end of wherein said output shaft is positioned at described rear chamber below.

6. cantilever centrifugal compressor according to claim 5, it is characterized in that, in described rear chamber, be provided with oil mist separator, described oil mist separator is provided with import, oil outlet and air outlet, described import and described oil outlet are communicated with described front chamber, and described air outlet is communicated with described rear chamber.

7. cantilever centrifugal compressor according to claim 6, is characterized in that, described oil mist separator is that two and described two oil mist separators are symmetrically arranged about described vertical plane.

8. cantilever centrifugal compressor according to claim 5, is characterized in that, described rear chamber is communicated with by balance tube with described suction port, and described balance tube is symmetrical about described vertical plane.

9. cantilever centrifugal compressor according to claim 5, is characterized in that, described support housing is symmetrical about described vertical plane.