CN209414201U - Compressor and coolant circulating system - Google Patents

Abstract

The disclosure provides a kind of compressor and coolant circulating system.Compressor includes cylinder, main shaft, the first diffuser, thrust disc and thrust bearing assembly.Cylinder includes side wall and the end wall for being connected to side wall one end；Main shaft is set to the inner barrel and one end of the main shaft is pierced by from the end wall；First diffuser is mounted on the outside of the end wall and forms thrust bearing accommodating chamber between the end wall；Thrust disc is fixed on one end of the main shaft and is located in the thrust bearing accommodating chamber；Thrust bearing assembly is located in the thrust bearing accommodating chamber, cooperates with the thrust disc both ends of the surface to the two-way thrust of the main shaft.The compressor of the disclosure, axial dimension are short, compact-sized.

Description

Compressor and coolant circulating system

Technical field

This disclosure relates to rotating machinery and refrigeration technology field, in particular to a kind of compressor and refrigerant circulation system System.

Background technique

Compressor is a kind of fluid machinery that low-pressure gas is changed into high pressure gas.Compressor is the heart of refrigeration system Dirty, common compressor has reciprocating, screw, rotary, vortex and centrifugal in refrigeration equipment.Centrifugal compressor It is by making impeller high speed rotation under the drive of main shaft, gas is with rotation, and under the action of the centrifugal force, gas is thrown to below Diffuser in, and no-man's-land is formed at impeller, at this moment extraneous live gas enters impeller, and impeller constantly rotates, Gas is continuously drawn into and throws away, to maintain the continuous flowing of gas.

Utility model content

The disclosure is designed to provide a kind of compressor, and axial dimension is short, compact-sized.The disclosure also provides one kind Coolant circulating system with the compressor.

Disclosure first aspect discloses a kind of compressor, including

Cylinder, including side wall and the end wall for being connected to side wall one end；

Main shaft is pierced by set on one end of the inner barrel and the main shaft from the end wall；

First diffuser, is mounted on the outside of the end wall, and one end has the first diffusion structure, the other end and the end wall Between formed thrust bearing accommodating chamber；

Thrust disc is fixed on one end of the main shaft and is located in the thrust bearing accommodating chamber；

Thrust bearing assembly is located in the thrust bearing accommodating chamber, cooperates with the thrust disc both ends of the surface to described The two-way thrust of main shaft.

In some embodiments, the thrust bearing assembly includes the first thrust with the cooperation of the left side of the thrust disc Bearing and the second thrust bearing cooperated with the right side of the thrust disc, first thrust bearing and first diffuser Inner wall fitting, second thrust bearing is bonded with the end wall.

In some embodiments, the thrust bearing assembly includes:

First thrust bearing, including the first thrust face and the first positioning surface, first thrust face and first positioning Face is set to the same side of first thrust bearing, positioned at first positioning surface radially inner side and relative to described first Positioning surface axially outward protrude by side；

Second thrust bearing, including the second thrust face and the second positioning surface, second thrust face and second positioning Face is set to the same side of second thrust bearing, positioned at second positioning surface radially inner side and relative to described second Positioning surface axially outward protrude by side, and second thrust face is opposite with first thrust face, second positioning surface and institute It is opposite to state the first positioning surface；With

Positioning ring is set between first thrust bearing and second thrust bearing, including is positioned with described first The first mating surface that face paste is closed and the second mating surface for be bonded with second positioning surface, for by first mating surface and The spacing of second mating surface limits the interval between first thrust face and second thrust face.

In some embodiments, the first thrust bearing and second thrust bearing are gas bearing, the positioning ring packet It includes and is connected to the radially inner side of the positioning ring and the fluid channel of radial outside.

In some embodiments, the radially inner side of first diffuser be additionally provided with for seal the main shaft or with it is described First shaft seal structure of the installation set that thrust disc is wholely set.

In some embodiments, the shaft seal structure includes comb structure.

In some embodiments, the compressor further include:

First transverse bearing seat is located in the middle part of the end wall and is integrally formed with the end wall；

First transverse bearing is mounted on the first transverse bearing seat and cooperates with the main shaft.

In some embodiments, one end end face of first transverse bearing is bonded with the thrust bearing assembly.

In some embodiments, the compressor be double-stage compressor, the compressor further include the second transverse bearing and Loading ability of bearing component, the loading ability of bearing component include:

Second diffuser, is installed on one end opposite with the end wall of the side wall, and one end has the second diffusion structure；

Second transverse bearing seat is located in the cylinder and is integrally formed with second diffuser, and described second is radial Bearing is mounted on the second transverse bearing seat and cooperates with the main shaft.

In some embodiments,

The loading ability of bearing component further includes axle envelope mounting hole；

The compressor further includes axle envelope component, and the parts of bearings is installed in the axle envelope mounting hole, has and is used for Seal the second shaft seal structure of the main shaft, the end clearance cooperation of the axle envelope component and second transverse bearing.

In some embodiments,

The axle envelope component includes the axle envelope fluid channel for being connected to axle envelope component radially inner side and radial outside；

The loading ability of bearing component includes load bearing component flow pass load bearing component flow pass, the axle envelope fluid channel Between being connected between the load bearing component flow pass load bearing component flow pass and second transverse bearing and the main shaft Gap.

In some embodiments, the thrust bearing assembly includes the first thrust with the cooperation of the left side of the thrust disc Bearing and the second thrust bearing cooperated with the right side of the thrust disc；The compressor further includes being located in the middle part of the end wall And with the integrally formed first transverse bearing seat of the end wall and be mounted on the first transverse bearing seat and with the main shaft First transverse bearing of cooperation；First thrust bearing, second thrust bearing, first transverse bearing and described Two transverse bearings are hydrostatic gas-lubricated bearing, wherein the thrust supplied for first thrust bearing and second thrust bearing Bearing air supply channel and the transverse bearing air supply channel supplied for first transverse bearing and second transverse bearing are each other Connection is independent of one another.

In some embodiments, the end wall includes step-like installing port, the other end of first diffuser End face is provided with the first diffuser positioning spigot, the periphery wall of first diffuser, first diffuser it is described another The end face at end and the first diffuser positioning spigot large-diameter portion, step surface and the small diameter portion with the step-like installing port respectively Cooperation.

In some embodiments, the first diffuser positioning spigot is matched with the step-like installing port small diameter portion sealing It closes.

In some embodiments, the thrust bearing of the thrust bearing assembly is gas bearing, the end of the cylinder The thrust axis that gas is supplied for the thrust bearing for the thrust bearing assembly is provided in wall and in first diffuser Hold air supply channel.

Disclosure second aspect discloses a kind of coolant circulating system, including compressor described in disclosure first aspect.

Based on the compressor that the disclosure provides, held by forming thrust bearing between the first diffuser and the end wall of cylinder Chamber is received to place thrust bearing assembly, the axial direction of compressor can be reduced while the main shaft to compressor carries out two-way thrust Size keeps compressor arrangement more compact.

The coolant circulating system provided based on the disclosure, it may have corresponding beneficial effect.

By the detailed description referring to the drawings to the exemplary embodiment of the disclosure, the other feature of the disclosure and its Advantage will become apparent.

Detailed description of the invention

Attached drawing described herein is used to provide further understanding of the disclosure, constitutes part of this application, this public affairs The illustrative embodiments and their description opened do not constitute the improper restriction to the disclosure for explaining the disclosure.In the accompanying drawings:

Fig. 1 is the structural schematic diagram of the compressor of the embodiment of the present disclosure；

Fig. 2 is the structural schematic diagram of the compressor of another embodiment；

Fig. 3 is the structural schematic diagram of the positioning ring in embodiment shown in fig. 1 or fig. 2.

Specific embodiment

Below in conjunction with the attached drawing in the embodiment of the present disclosure, the technical solution in the embodiment of the present disclosure is carried out clear, complete Site preparation description, it is clear that described embodiment is only disclosure a part of the embodiment, instead of all the embodiments.Below Description only actually at least one exemplary embodiment be it is illustrative, never as to the disclosure and its application or making Any restrictions.Based on the embodiment in the disclosure, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, belong to the disclosure protection range.

Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments Up to the unlimited the scope of the present disclosure processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached It does not need that it is further discussed in figure.

For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ", " ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and " in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and And respective explanations are made to the opposite description in space used herein above.

The embodiment of the present disclosure discloses a kind of compressor, and as shown in Figure 1 and Figure 2, the compressor of the present embodiment includes cylinder, master Axis 4, the first diffuser 2, thrust disc 41 and thrust bearing assembly.

Cylinder includes side wall 11 and the end wall 12 for being connected to 11 one end of side wall, and the stator and rotor of compressor are located at cylinder It is interior.

Main shaft 4 is set to inner barrel and one end of main shaft 4 is pierced by from end wall 12.The stator of compressor includes main shaft 4, main shaft 4 rotate for impeller to compress to gas.

First diffuser 2 is mounted on the outside of end wall 12, and one end (being left end in Fig. 1 and Fig. 2) has the first diffusion knot Structure forms thrust bearing accommodating chamber between the other end (being right end in Fig. 1 and Fig. 2) and end wall 12.Diffuser is used in compressor In the component for converting the speed of gas to pressure, the first diffuser 2 is mounted on the outside of the end wall 12 of cylinder as shown in Figure 1, And thrust bearing accommodating chamber can be directly formed to accommodate thrust bearing assembly between end wall 12.

As depicted in figs. 1 and 2, in some embodiments, end wall includes step-like installing port, the first diffuser 2 it is another The end face at end is provided with the first diffuser positioning spigot, the periphery wall of the first diffuser 2, the first diffuser 2 the other end end Face and the first diffuser positioning spigot cooperate with the large-diameter portion, step surface and small diameter portion of step-like installing port respectively.Setting first Diffuser positioning spigot is also conducive to guarantee to be located on the first diffuser 2 conducive to the concentricity for ensuring the first diffuser Yu main shaft 4 Shaft seal structure and main shaft 4 concentricity, improve sealing effect.

As depicted in figs. 1 and 2, in some embodiments, the first diffuser positioning spigot and step-like installing port small diameter portion Sealing cooperation.The setting is conducive to the motor accommodating chamber where the compression chamber and motor stator prevented where the compression unit of compressor Gas blowby.

Thrust disc 41 is fixed on one end (being left end in Fig. 1 and Fig. 2) of main shaft 4 and is located in thrust bearing accommodating chamber.It pushes away Power disk 41 rotates together with main shaft 4, and for transmitting axial force to main shaft 4, thrust disc 41 can be in such a way that fastener be connected It is fastened on main shaft 4, can also be integrally formed with main shaft 4, in the present embodiment, as shown in Figure 1 and Figure 2, thrust disc 41 passes through heat The fixed end for being set in main shaft 4 of the mode of set.

As shown in Figure 1 and Figure 2, thrust bearing assembly is located in thrust bearing accommodating chamber, with 41 both ends of the surface of thrust disc cooperate with To the two-way thrust of main shaft 4.The axis to the left of main shaft 4 is born in a part of thrust bearing assembly and the left side cooperation of thrust disc 41 Xiang Li carries out thrust and limit for carrying out to main shaft 4, another part of thrust bearing assembly and the right side of thrust disc 41 to the right The axial force to the right of main shaft 4 is born in end face cooperation, carries out thrust and limit, i.e. thrust axis to the left for carrying out to main shaft 4 Bearing assembly is used to push away main shaft 4 and carries out thrust to right and left both direction.

The compressor of the present embodiment is accommodated by forming thrust bearing between the first diffuser 2 and the end wall 12 of cylinder Chamber is placed for the thrust bearing assembly to the two-way thrust of main shaft 4, is reduced the axial dimension of compressor, is made compressor arrangement Rigidity and mode of flexural vibration critical speed more compact, facilitating the length for reducing main shaft 4 and improve main shaft 4.

In some embodiments, as shown in Figure 1, Figure 2, Figure 3 shows, thrust bearing assembly includes matching with the left side of thrust disc 41 The first thrust bearing 6 closed and the second thrust bearing 9 with the right side cooperation of thrust disc 41, the first thrust bearing 6 and first The inner wall of diffuser 2 is bonded, and the second thrust bearing 9 is bonded with end wall 12.First thrust bearing 6 and the second thrust bearing 9 are directly It is fitted on the first diffuser 2 and end wall 12, saves Intermediate mounting member, further reduce compressor axial dimension, make to press Contracting machine structure is more compact.

In some embodiments, thrust bearing assembly includes the first thrust bearing 6, the second thrust bearing 9 and positioning ring 8.

First thrust bearing 6 includes the first thrust face 62 and the first positioning surface 61, the first thrust face 62 and the first positioning surface 61 are set to the same side of the first thrust bearing 6, positioned at the first positioning surface 61 radially inner side and relative to the first positioning surface 61 Side is protruded axially outward.

Second thrust bearing 9 includes the second thrust face 92 and the second positioning surface 91, the second thrust face 92 and the second positioning surface 91 are set to the same side of the second thrust bearing 9, positioned at the second positioning surface 91 radially inner side and relative to the second positioning surface 91 Side is protruded axially outward.Second thrust face 92 and the first thrust face 62 are opposite, the second positioning surface 91 and 61 phase of the first positioning surface It is right.

Positioning ring 8 is set between the first thrust bearing 6 and the second thrust bearing 9, including what is be bonded with the first positioning surface 61 First mating surface 81 and the second mating surface 82 being bonded with the second positioning surface 91, for passing through the first mating surface 81 and the second cooperation The spacing in face 82 limits the interval between the first thrust face 62 and the second thrust face 92.

First thrust face 62 of the first thrust bearing 6 and the second thrust face 92 of the second thrust bearing 9 are respectively used to and master The mating surface of the two sides of thrust disc 41 on axis 4 matches, in the embodiment shown in fig. 1 the first thrust face 62 and the second thrust Face 92 is matched with the left side of thrust disc 41 and right side being fixedly connected on the main shaft of compressor 4 respectively.First thrust face 62 for bearing the axial force to the left of main shaft 4, and the second thrust face 92 is used to bear the axial force to the right of main shaft 4.

First positioning surface 61 of the first thrust bearing 6 and the second positioning surface 91 of the second thrust bearing 9 are for determining first Interval between thrust face 62 and the second thrust face 92.The first positioning surface 62 and the second positioning surface 92 are by dividing in the present embodiment It is not bonded with the first mating surface 81 of positioning ring 8 and the second mating surface 82, so that the first mating surface 81 of positioning ring 8 and second is matched The distance between conjunction face 82 defines the distance between the first thrust bearing 6 and the second thrust bearing 9, that is, defines the first thrust Interval between face 62 and the second thrust face 92, namely define while cooperating with the first thrust face 62 and the second thrust face 92 The sum of the fit clearance of the fit clearance and the second thrust face 92 of thrust disc 41 and the first thrust face 62.To by adjusting positioning The gap when work of the adjustable thrust bearing assembly of distance of the first mating surface 81 and the second mating surface 82 of ring 8.

In the working clearance for needing to turn down thrust bearing assembly, such as in compressor as shown in Figure 1 and Figure 2, first First thrust face 62 of thrust bearing 6 and/or the second thrust face 92 of the second thrust bearing 9 are due to through work after a period of time Abrasion, causes the interval between the first thrust face 62 and the second thrust bearing 9 to become larger, thus the left side of thrust disc 41 and first The fit clearance of thrust face 62 and the sum of the fit clearance of right side and the second thrust face 92 become larger, and need to reduce thrust bearings The gap of part.Thrust bearing assembly can be taken out from compressor at this time, the gap after measurement thrust bearing assembly abrasion, root The adjustment amount needed to positioning ring 8 is determined according to the gap.Then positioning ring 8 is taken out from thrust bearing assembly, according to determination Adjustment amount by grinding etc. processing methods the first mating surface 81 of positioning ring 8 and/or the second mating surface 82 are processed, with Reduce the spacing between the first mating surface 81 and the second mating surface 82, then the second thrust bearing 9 is fixed on to the cylinder of compressor On the end wall 12 of body, positioning ring 8 is fixedly connected on after the second mating surface 82 of positioning ring 8 is bonded with the second positioning surface 92 Then first positioning surface 62 of the first thrust bearing 6 is bonded by two thrust bearings 9 with the first mating surface 81 again, installation first pushes away First diffuser 2 of 6 left end of power bearing fastens the first diffuser 2 so that the first thrust bearing 6 to be pressed on positioning ring 8.

In the working clearance for needing to tune up thrust bearing, first mating surface 81 and 82 distance of the second mating surface are replaced Suitable positioning ring 8.By the way that positioning ring 8 is arranged, the gap of thrust bearing assembly is adjusted with can be convenient.

First thrust face 62 of the first thrust bearing 6 is located at the radially inner side of the first positioning surface 61, i.e. the first thrust face 62 Positioned at the middle part of the first thrust bearing 6, the first positioning surface 61 is located at the outside of the first thrust bearing 6.First thrust face 62 is opposite In the first positioning surface 61, side is protruded axially outward, i.e. the first thrust bearing 6 is in 62 institute of the first positioning surface 61 and the first thrust face Side be middle part protrusion it is step-like.Since the first thrust face 62 is the working surface with 41 cooperating of thrust disc, Required precision is high, and the positioning accuracy of the first positioning surface 61 is adjusted due to that can lean on positioning ring 8, and the precision of the first positioning surface 61 is wanted Ask relatively low.This kind, which is provided with, to be conducive to process the high-precision of the first thrust face 62 of the first thrust bearing 6, such as flat stone mill Cut processing.Similarly, the setting of the same race of the second thrust face 92 and the second positioning surface 91 of the second thrust bearing 9 also contributes to realization pair The high-precision of second thrust bearing 9 is processed.

The gap of the thrust bearing assembly of the present embodiment is easy to adjust, while the first thrust bearing 6 and the second thrust bearing 9 High-precision is easily achieved to process.

In some embodiments, the first thrust bearing 6 and the second thrust bearing 9 are gas bearing, and positioning ring 8 includes connection The radially inner side of positioning ring 8 and the fluid channel of radial outside.

First thrust bearing 6 and the second thrust bearing 9 are gas bearing, such as can be hydrostatic gas-lubricated bearing or action pneumatic Body bearing.Gas bearing, which is used, forms air film between the thrust face and thrust piece of thrust bearing using gas, have high revolving speed, The advantages that low noise.For example, Fig. 1, compressor shown in Fig. 2 embodiment in, the first thrust bearing 6 be hydrostatic gas-lubricated bearing When, can between the left side and the first thrust face 61 of the thrust disc 41 of compressor injection pressure gas, make thrust disc 41 Air film can be formed between left side and the first thrust face 61.First thrust bearing 6 and the second thrust bearing 9 use pressurized air After bearing, the advantages that can have superelevation rotating accuracy, ultra-low friction, ultralow vibration, super low noise, long, pollution-free service life, fit For high revolving speed and high-precision occasion, such as it is suitble to especially minimize in centrifugal compressor in centrifugal compressor and applies.

The present embodiment can make between the mating surface of thrust disc 41 of gas bearing and the thrust face of thrust bearing assembly Exhaust is smoothly discharged from fluid channel to the outside of positioning ring 8, pushes away so that exhaust be prevented to be trapped in the first thrust bearing 6 and second Between the thrust face of power bearing 9 and the mating surface of thrust disc 41, preventing the back pressure due to gas bearing from increasing influences Bearing inner Gas film pressure distribution to influence gas bearing rigidity and bearing capacity, and prevents pneumatic hammer vibration.The present embodiment facilitates Make the smooth in exhaust of gas bearing, improves the rotational stability of gas bearing rotor-support-foundation system.

In some embodiments, fluid channel is located on a side end face of positioning ring 8.Reality as shown in Figure 1, Figure 2, Figure 3 shows It applies in example, fluid channel is set on the left side of positioning ring 8.The setting can make fluid channel easy to process, make positioning ring 8 More compact structure is compared to and is designed with fluid channel in both sides of the face, reduces the processing shadow to the mating surface of positioning ring 8 It rings.

In some embodiments, as shown in Figure 1 to Figure 3, fluid channel includes the slot 83 on the end face of positioning ring 8. Setting fluid channel easy to process, the structure of positioning ring 8 is simple, while also contributing to the smooth exhaust of gas bearing.

In some embodiments, as shown in figure 3, fluid channel includes circumferentially distributed multiple slots 83.The setting is into one Step facilitates the smooth exhaust of gas bearing, improves the exhaust stability of gas bearing.

In some embodiments, slot 83 is radial slot, and multiple radial slots are uniformly distributed along the circumferential direction of positioning ring 8.The setting Facilitate the convenient processing to positioning ring 8.

In embodiment (not shown), it is outside that fluid channel may be set to be radially inner side and diameter through positioning ring 8 The hole of side.

In some embodiments, as shown in Figure 1 to Figure 3, the first mating surface 81 and the second mating surface 82 of positioning ring 8 are fixed The outermost plane of the both ends of the surface of position ring 8.The setting facilitates the convenient mating surface by flat surface grinding mode to positioning ring 8 Adjustment and processing, help to improve dimensional accuracy, form accuracy and the positioning accuracy of positioning ring 8.

In some embodiments, positioning ring 8 be equipped with for positioning ring 8 be mounted on the first thrust bearing 6 or the second push away Through-hole on power bearing 9.As shown in Figure 1 to Figure 3, positioning ring 8 is equipped with through-hole, can use screw 2 and installs positioning ring 8 simultaneously On the end wall 12 for the cylinder for being fitted on the second thrust bearing 9, while the second thrust bearing can also being mounted on to compressor.

In some embodiments, the radially inner side of the first diffuser 2 be additionally provided with for seal main shaft 4 or with thrust disc 41 1 First shaft seal structure of the installation set of body setting.In embodiment shown in fig. 1 or fig. 2, the installation set and thrust disc 41 are constituted The thrust disk component of one, thrust disk component hot jacket is on main shaft 4, and the first shaft seal structure is for sealing the installation set.By first Shaft seal structure can be integrated with the first diffuser 2, can be further reduced the axial dimension of compressor, make compressor arrangement more Rigidity that is compact, facilitating the length for reducing main shaft 4 and improve main shaft 4.

In some embodiments, the first shaft seal structure includes comb structure.Comb structure has good sealing to gas Effect.

In some embodiments, compressor further includes the first transverse bearing seat and the first transverse bearing 71.First radial axle Seat is held to be located at 12 middle part of end wall and be integrally formed with end wall 12.First transverse bearing 71 be mounted on the first transverse bearing seat and with Main shaft 4 cooperates.The setting helps to make the structure of compressor more compact.

As depicted in figs. 1 and 2, in some embodiments, compressor is two stage centrifugal compressor.Two stage centrifugal compressor Compressor drum includes aforementioned main shaft 4, pressure disc 41 and the one stage impeller and sencond stage impeller that are set to 4 both ends of main shaft.Compressor It further include the second transverse bearing 72 and loading ability of bearing component 5.Loading ability of bearing component 5 includes the second diffuser and the second transverse bearing Seat.Second diffuser is installed on one end opposite with end wall 12 of side wall 11, has the second diffusion structure.Second transverse bearing seat It is integrally formed in cylinder and with the second diffuser.Second transverse bearing 72 is mounted on the second transverse bearing seat and and main shaft 4 cooperations.Double-stage compressor can carry out second-compressed to gas, improve the compression ratio of gas.In Fig. 1 and implementation shown in Fig. 2 In example, the first diffuser 2 is level-one diffuser, and the second diffuser is second level diffuser.Wherein one stage impeller is located at the first diffusion The one stage of compression of 2 left end of device is intracavitary, and the two-stage compression that sencond stage impeller is located at the second diffuser right end is intracavitary.Motor is equipped in cylinder Stator.It include permanent magnet in the middle part of main shaft 4.Therefore, main shaft 4 undertakes the function of rotor simultaneously, and motor stator is matched with main shaft 4 It closes, the compressor drum of centrifugal compressor can be driven to rotate.

Second diffuser and the second transverse bearing seat are integrally formed and are arranged, the axial ruler of compressor can be further decreased It is very little and keep compressor arrangement compact, help to reduce 4 length of main shaft and reduce transverse bearing load, helps to improve main shaft 4 Rigidity and mode of flexural vibration critical speed.

In some embodiments, as shown in Figure 1, thrust bearing assembly includes first with the cooperation of the left side of thrust disc 41 Thrust bearing 6 and the second thrust bearing 9 cooperated with the right side of thrust disc 41；Compressor further include be located at the middle part of end wall 12 and With the integrally formed first transverse bearing seat of end wall 12 and the first diameter for being mounted on the first transverse bearing seat and cooperating with main shaft 4 To bearing 71；First thrust bearing 6, the second thrust bearing 9, the first transverse bearing 71 and the second transverse bearing 72 are pressurized air Bearing, the first thrust bearing 6, the second thrust bearing 9, the first transverse bearing 71 and the second transverse bearing 72 air supply channel each other Connection.

As shown in Figure 1, by by main tetra- tunnel 3 Fen Wei of air supply channel on cylinder, all the way to give first by the first diffuser 2 The air supply channel of thrust bearing 6, all the way for by end wall 12 to the air supply channel of the second thrust bearing 9, all the way to pass through end wall 12 to the air supply channel of the first transverse bearing 71, all the way air supply channel to give the second transverse bearing 72 by the second diffuser. Which is since air supply channel only has all the way, so the supply gas pressure to gas bearing controls simpler convenience, it is only necessary to control Make the supply gas pressure on main air supply channel 3, i.e., it is adjustable to the first thrust bearing 6, the second thrust bearing 9, the first transverse bearing 71 and second the supply gas pressure of transverse bearing 72 prevent pneumatic hammer vibration from generating to adjust bearing rigidity and bearing capacity.

In some embodiments, as shown in Fig. 2, independent gas supply can also be separated to thrust bearing assembly and transverse bearing. Wherein the first thrust bearing 6 and the second thrust bearing 9 share thrust bearing air supply channel, and the first transverse bearing 71 and second is radial Bearing 72 shares transverse bearing air supply channel (not shown in Fig. 2).The plenum system of thrust bearing assembly can with as shown in Fig. 2, Thrust bearing air supply channel for the thrust bearing supply gas of thrust bearing assembly is set in the end wall 12 of cylinder and first In diffuser 2.Thrust bearing air supply channel is divided into two-way, all the way by end wall 12 to the second thrust bearing 9 gas supply, all the way into Enter in first order diffuser 2, is supplied by the gas circuit on first order diffuser 2 to the first thrust bearing 6.Thrust bearing gas supply is logical The gas supply in road passes through the internal restriction of the first thrust bearing 6 and the second thrust bearing 9, into matching for two thrust faces and thrust disc 41 Gap between conjunction face forms the air film with pressure, and air film acts on thrust disc 41, offsets the axial force of main shaft 41.Fortune In row, the supply gas pressure on thrust bearing air supply channel can be adjusted, according to the Vibration Condition of cylinder internal pressure and main shaft 4 to adjust The rigidity and bearing capacity for saving the first thrust bearing 6 and the second thrust bearing 9 prevent pneumatic hammer vibration from generating.

In the embodiment shown in Figure 2, the transverse bearing supplied for the first transverse bearing 71 and the second transverse bearing 72 supplies Gas channel is divided into two-way and enters in the bearing chamber for accommodating the first transverse bearing 71 and the second transverse bearing 72, by the first radial axle After holding 71 and 72 internal restriction of the second transverse bearing, between the first transverse bearing 71 and the second transverse bearing 72 and main shaft 4 Gap formed air film.In operation, transverse bearing air supply channel is adjusted according to the Vibration Condition of cylinder internal pressure and main shaft 14 Supply gas pressure prevents pneumatic hammer vibration from producing to adjust the rigidity and bearing capacity of the first transverse bearing 71 and the second transverse bearing 72 It is raw.

As depicted in figs. 1 and 2, in some embodiments, loading ability of bearing component 5 further includes axle envelope mounting hole.Compressor is also Including axle envelope component 10, parts of bearings is installed in axle envelope mounting hole.Axle envelope component 10 includes the second axis for sealing main shaft 4 Seal structure.Second shaft seal structure for example can be comb structure.An end face (the figure of axle envelope component 10 and the second transverse bearing 72 Right side in 1 and Fig. 2) clearance fit.The setting makes axle envelope component 10 while playing the role of sealing main shaft 4, also holds The axial positioning function of the second transverse bearing 72 is carried on a shoulder pole, a component serves many purposes, and compressor arrangement can be made compact, is conducive to Reduce the length of compressor drum.

As shown in Figure 1, in some embodiments, axle envelope component 10 includes that connection 10 radially inner side of axle envelope component and diameter are outside The axle envelope fluid channel 101 of side, loading ability of bearing component 5 include load bearing component flow pass 52, and the connection of axle envelope fluid channel 101 is held Carry the gap between component flow pass 52 and the second transverse bearing 72 and main shaft 4.The setting is in the second transverse bearing 72 and master Exhaust passage is formed between the motor accommodating chamber in gap and inner barrel between axis 4, conducive to the second transverse bearing 72 is guaranteed Back pressure is stablized.

As shown in Figure 1, loading ability of bearing component 5 further includes the supporting part that bearing structure is connected to the intracorporal air supply channel 3 of cylinder Part flow channel 51, the load bearing component flow channel 51 connection accommodate the bearing chamber of the second transverse bearing 72, to be the second diameter It is supplied to bearing 72.

As shown in Figure 1 or 2, loading ability of bearing component 5 further includes being set to the second diffuser away from the second diffusion structure The second diffuser positioning spigot on one side.The cooperation of the respective end of second diffuser positioning spigot and cylinder, can be with limited bearing The axial position and circumferential position of load bearing component 5, conducive to coaxial between the shaft seal structure and main shaft 4 guaranteed on axle envelope component 10 Degree, and then guarantee the sealing performance to main shaft 4.

Location hole and mounting hole can also be respectively set on axle envelope component 10 and loading ability of bearing component 5.Axle envelope component 10 Location hole is used to cooperate circumferential position of the limitation axle envelope component 10 relative to loading ability of bearing component 5, axle envelope component with shop bolt 10 mounting hole is for being fixedly connected with axle envelope component 10 and loading ability of bearing component 5.The location hole of loading ability of bearing component 5 is used for and determines Circumferential position of the position bayonet fittings limitation loading ability of bearing component 5 relative to cylinder, the mounting hole of loading ability of bearing component 5 is for fixing Connect bearing load bearing component 5 and cylinder.

A kind of coolant circulating system is also disclosed in some embodiments, the compressor including above embodiments.

Finally it should be noted that: above embodiments are only to illustrate the technical solution of the disclosure rather than its limitations；To the greatest extent Pipe is described in detail the disclosure referring to preferred embodiment, it should be understood by those ordinary skilled in the art that: still It can modify to the specific embodiment of the disclosure or some technical features can be equivalently replaced；Without departing from this public affairs The spirit of technical solution is opened, should all be covered in the claimed technical proposal scope of the disclosure.

Claims (16)

1. a kind of compressor, which is characterized in that including

Cylinder including side wall (11) and is connected to the end wall (12) of side wall (11) one end；

Main shaft (4), the one end for being set to the inner barrel and the main shaft (4) are pierced by from the end wall (12)；

First diffuser (2), is mounted on the outside of the end wall (12), and one end has the first diffusion structure, the other end with it is described Thrust bearing accommodating chamber is formed between end wall (12)；

Thrust disc (41) is fixed on one end of the main shaft (4) and is located in the thrust bearing accommodating chamber；

Thrust bearing assembly is located in the thrust bearing accommodating chamber, cooperates with the thrust disc (41) both ends of the surface to described Main shaft (4) two-way thrust.

2. compressor as described in claim 1, which is characterized in that the thrust bearing assembly includes and the thrust disc (41) Left side cooperation the first thrust bearing (6) and the second thrust bearing (9) for cooperating with the right side of the thrust disc (41), First thrust bearing (6) is bonded with the inner wall of first diffuser (2), second thrust bearing (9) and the end Wall (12) fitting.

3. compressor as described in claim 1, which is characterized in that the thrust bearing assembly includes:

First thrust bearing (6), including the first thrust face (62) and the first positioning surface (61), first thrust face (62) and institute The same side that the first positioning surface (61) is set to first thrust bearing (6) is stated, first thrust face (62) is located at described The radially inner side of first positioning surface (61) and relative to first positioning surface (61) axially outward side protrude；

Second thrust bearing (9), including the second thrust face (92) and the second positioning surface (91), second thrust face (92) and institute The same side that the second positioning surface (91) is set to second thrust bearing (9) is stated, second thrust face (92) is located at described The radially inner side of second positioning surface (91) and relative to second positioning surface (91) axially outward side protrude, described second pushes away Relatively, second positioning surface (91) and first positioning surface (61) are opposite for power face (92) and first thrust face (62)； With

Positioning ring (8) is set between first thrust bearing (6) and second thrust bearing (9), including with described first The first mating surface (81) of positioning surface (61) fitting and the second mating surface (82) being bonded with second positioning surface (91), are used for By the spacing of first mating surface (81) and second mating surface (82) limit first thrust face (62) with it is described Interval between second thrust face (92).

4. compressor as claimed in claim 3, which is characterized in that the first thrust bearing (6) and second thrust bearing (9) For gas bearing, the positioning ring (8) includes the fluid channel for being connected to the radially inner side and radial outside of the positioning ring (8).

5. compressor as described in claim 1, which is characterized in that the radially inner side of first diffuser (2) is additionally provided with use In the first shaft seal structure for sealing the main shaft (4) or the installation set being wholely set with the thrust disc (41).

6. compressor as claimed in claim 5, which is characterized in that the shaft seal structure includes comb structure.

7. compressor as described in claim 1, which is characterized in that the compressor further include:

First transverse bearing seat is located in the middle part of the end wall (12) and is integrally formed with the end wall (12)；

First transverse bearing (71) is mounted on the first transverse bearing seat and cooperates with the main shaft (4).

8. compressor as claimed in claim 7, which is characterized in that one end end face of first transverse bearing (71) with it is described Thrust bearing assembly fitting.

9. compressor as described in claim 1, which is characterized in that the compressor is double-stage compressor, and the compressor is also Including the second transverse bearing (72) and loading ability of bearing component (5), the loading ability of bearing component (5) includes:

Second diffuser, is installed on one end opposite with the end wall (12) of the side wall (11), and one end has the second diffusion Structure；

Second transverse bearing seat is located in the cylinder and is integrally formed with second diffuser, second transverse bearing (72) it is mounted on the second transverse bearing seat and cooperates with the main shaft (4).

10. compressor as claimed in claim 9, which is characterized in that

The loading ability of bearing component (5) further includes axle envelope mounting hole；

The compressor further includes axle envelope component (10), and the axle envelope component is installed in the axle envelope mounting hole, has and is used for Seal the second shaft seal structure of the main shaft (4), an end of the axle envelope component (10) and second transverse bearing (72) Face clearance fit.

11. compressor as claimed in claim 10, which is characterized in that

The axle envelope component (10) includes the axle envelope fluid channel for being connected to axle envelope component (10) radially inner side and radial outside (101)；

The loading ability of bearing component (5) includes load bearing component flow pass load bearing component flow pass (52), the axle envelope fluid Channel (101) be connected to the load bearing component flow pass load bearing component flow pass (52) and second transverse bearing with it is described Gap between main shaft.

12. compressor as claimed in claim 9, which is characterized in that the thrust bearing assembly includes and the thrust disc (41) the first thrust bearing (6) that left side cooperates and the second thrust bearing with the right side cooperation of the thrust disc (41) (9)；The compressor further include be located at the end wall (12) in the middle part of and with integrally formed first radial axle of the end wall (12) It holds seat and is mounted on the first transverse bearing (71) on the first transverse bearing seat and with the main shaft (4) cooperation；Described One thrust bearing (6), second thrust bearing (9), first transverse bearing (71) and second transverse bearing (72) For hydrostatic gas-lubricated bearing, wherein the thrust bearing supplied for first thrust bearing (6) and second thrust bearing (9) Air supply channel and for first transverse bearing (71) and second transverse bearing (72) gas supply transverse bearing air supply channel It communicates with each other or independently of one another.

13. the compressor as described in any one of claims 1 to 12, which is characterized in that the end wall includes step-like installation Mouthful, the end face of the other end of first diffuser (2) is provided with the first diffuser positioning spigot, first diffuser (2) end face of the other end of periphery wall, first diffuser (2) and the first diffuser positioning spigot respectively with Large-diameter portion, step surface and the small diameter portion cooperation of the step-like installing port.

14. compressor as claimed in claim 13, which is characterized in that the first diffuser positioning spigot with it is described step-like The sealing cooperation of installing port small diameter portion.

15. the compressor as described in any one of claims 1 to 12, which is characterized in that the thrust of the thrust bearing assembly Bearing is gas bearing, is provided in the end wall (12) of the cylinder and in first diffuser (2) for being described The thrust bearing air supply channel of the thrust bearing supply gas of thrust bearing assembly.

16. a kind of coolant circulating system, which is characterized in that including the compressor as described in claim 1 to 15 is any.