CN104712556B - Screw compressor - Google Patents

Screw compressor Download PDF

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Publication number
CN104712556B
CN104712556B CN201310680416.8A CN201310680416A CN104712556B CN 104712556 B CN104712556 B CN 104712556B CN 201310680416 A CN201310680416 A CN 201310680416A CN 104712556 B CN104712556 B CN 104712556B
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CN
China
Prior art keywords
vortex
pressure
dynamic vortex
dynamic
screw compressor
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CN201310680416.8A
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Chinese (zh)
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CN104712556A (en
Inventor
李庆才
叶涛
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艾默生环境优化技术(苏州)有限公司
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Priority to CN201310680416.8A priority Critical patent/CN104712556B/en
Priority claimed from PCT/CN2014/088630 external-priority patent/WO2015085823A1/en
Publication of CN104712556A publication Critical patent/CN104712556A/en
Application granted granted Critical
Publication of CN104712556B publication Critical patent/CN104712556B/en

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Abstract

The present invention relates to a kind of screw compressor (100), comprising: shell (10);The compression mechanism (CM) being arranged in the shell (10), the compression mechanism (CM) include determine vortex (20) and dynamic vortex (30);Main bearing seat (50), the main bearing seat (50) are suitable for supporting the determine vortex (20);Back pressure cavity (B), the back pressure cavity (B) are formed in opposite second side of dynamic vortex end plate (34) and are suitable for applying back pressure so that the dynamic vortex (30) is engaged with the determine vortex (20) to second side of dynamic vortex end plate;And pressure introduction passage (P), the pressure introduction passage (P) setting in the compression mechanism (CM) and can provide selective fluid communication between the presumptive area in the back pressure cavity (B) and the shell (10), wherein pressure of inspiration(Pi) of the pressure of the presumptive area greater than the screw compressor.

Description

Screw compressor

Technical field

The present invention relates to a kind of screw compressors.

Background technique

The content of this part provides only background information relevant to the disclosure, may not constitute the prior art.

A kind of Design of Scroll Compressor known, wherein back pressure cavity setting dynamic vortex side to provide for dynamic vortex make its with The back pressure that determine vortex engages in the axial direction.However, in this type of design, under the unfavorable operating condition such as such as liquid hammer, existing A possibility that back pressure reduces and engage dynamic vortex and determine vortex can not in the axial direction, can not be just so as to cause compressor Often work and reduce the functional reliability of compressor.

Therefore, it is necessary to a kind of further improved screw compressors of reliability.

Summary of the invention

One purpose of one or more embodiments of the invention is to provide a kind of vortex that reliability further increases Compressor.

Another purpose of one or more embodiments of the invention be to provide one kind after dynamic vortex is toppled still The screw compressor for so dynamic vortex and determine vortex being enabled to be engaged with each other in the axial direction.

Another purpose of one or more embodiments of the invention be to provide that a kind of Energy Efficiency Ratio is higher and/or cost more The higher screw compressor of low and/or wearability.

One or more of to achieve the goals above, according to one aspect of the invention, it provides a kind of scroll compressions Machine may include: shell;It is arranged in the intracorporal compression mechanism of the shell, the compression mechanism includes determine vortex and dynamic vortex, Wherein the determine vortex includes determine vortex end plate and the determine vortex blade for being formed in first side of determine vortex end plate, the dynamic whirlpool Rotation includes dynamic vortex end plate and the dynamic vortex blade for being formed in first side of dynamic vortex end plate, and the wherein determine vortex leaf Piece and the dynamic vortex blade be interconnected with formed therebetween it is a series of can be to the compression chamber that fluid is compressed;Base bearing Seat, the main bearing seat are suitable for supporting the determine vortex;Back pressure cavity, the back pressure cavity are formed in the opposite of the dynamic vortex end plate Second side and be suitable for applying back pressure to second side of the dynamic vortex end plate so that the dynamic vortex and described determining whirlpool Be screwed on conjunction;And pressure introduction passage, the pressure introduction passage are arranged in the compression mechanism and can be in the back Selective fluid communication is formed between presumptive area in pressure chamber and the shell, wherein the pressure of the presumptive area is greater than The pressure of inspiration(Pi) of the screw compressor.

Detailed description of the invention

By description referring to the drawings, the feature and advantage of one or several embodiments of the invention will become more Add and be readily appreciated that, in which:

Fig. 1 is a kind of longitudinal sectional view of screw compressor;

Fig. 2 is the adaptability cross-sectional view of the compression mechanism and main bearing seat in Fig. 1;

Fig. 3 is schematic diagram when dynamic vortex shown in Fig. 2 is toppled;

Fig. 4 is the bottom view of the determine vortex of first embodiment according to the present invention;

Fig. 5 is the partial sectional view of determine vortex shown in Fig. 4;

Fig. 6 is the top view of the dynamic vortex of second embodiment according to the present invention;

Fig. 7 is the cross-sectional view of dynamic vortex shown in fig. 6;

Fig. 8 is the top view of the dynamic vortex of third embodiment according to the present invention;

Fig. 9 is the cross-sectional view of dynamic vortex shown in Fig. 8;

Figure 10 is the perspective view of the determine vortex of the 4th embodiment according to the present invention;And

Figure 11 is the top view of the dynamic vortex of the 5th embodiment according to the present invention.

Specific embodiment

Description related to the preferred embodiment is only exemplary below, and is definitely not to the present invention and its application or usage Limitation.The same reference numerals are used to designate identical components in various figures, therefore the construction of same parts will not Repeat description.

The essential structure and working principle of screw compressor are described below with reference to Fig. 1-3.

As illustrated in fig. 1 and 2, screw compressor (hereinafter also called compressor) 100 includes substantially closed shell 10. Shell 10 defines the inner space of compressor 100.In example in figure, shell 10 can be by the body part of general cylindrical shape 12, top cover 14 and bottom cover 16 are constituted.These components of shell 10 for example can be any suitable by welding, being bolted etc. Method is connected to each other.

Fluid inlet accessory 17 for sucking working fluid can be set on shell 10 and for compressed work to be discharged Make the fluid outlet accessory 18 of fluid.Can be set in shell 10 can be to the compression mechanism CM that fluid is compressed.At this In example, for driving the driving mechanism 40 of compression mechanism CM to be also provided in the housing 10.But those skilled in the art should Understand, for so-called open compressor design, driving mechanism 40 also be can be set in the outside of shell 10.

More specifically, in the example shown in the figure, compression mechanism CM may include determine vortex 20 and dynamic vortex 30.Determine whirlpool Rotation 20 can be fixed relative to shell 10 in any suitable manner, such as by bolt relative to the main bearing seat described below 50 is fixed.

As shown in Fig. 2, determine vortex 20 may include determine vortex end plate 24 and be formed in 24 side of determine vortex end plate determine whirlpool Vane piece 26 and peripheral wall portion 22 positioned at 20 outermost radial outside of determine vortex.Peripheral wall portion 22 may be constructed the one of determine vortex blade 26 Part.The part of the substantial middle of determine vortex end plate 24 is formed with exhaust outlet 28.

Dynamic vortex 30 may include dynamic vortex end plate 34, the dynamic vortex blade 36 and shape for being formed in 34 side of dynamic vortex end plate At the hub 32 in 34 other side of dynamic vortex end plate.Suitable for supporting the main bearing seat 50 of determine vortex 20 and/or dynamic vortex 30 can be with It is fixed relative to shell 10 by any suitably mode.Dynamic vortex 30 can driven-mechanism 40 driving and relative to determine vortex (that is, the central axis of dynamic vortex 30 is rotated around the central axis of determine vortex 20, but dynamic vortex 30 itself will not for 20 translation rotations Central axis around itself rotates) to realize the compression of fluid.Above-mentioned translation rotation passes through between determine vortex 20 and dynamic vortex 30 The cross slip-ring 58 of setting is realized.

Determine vortex blade 26 can be interconnected with dynamic vortex blade 36 with determine vortex end plate 24 and dynamic vortex end plate 34 Constitute a series of compression chamber C1, C2 and C3 that volumes are gradually reduced from radial outside to radially inner side etc. together to carry out to fluid Compression.Exhaust outlet 28 can be in fluid communication with a series of innermost compression chamber C3 in compression chambers.

In the example depicted in fig. 1, screw compressor 100 designs for high-pressure side.In this type of design, at compression mechanism 40 In pressure at expulsion area, and working fluid to be compressed direct supplies in the suction pressure region in compression mechanism CM.Specifically, it flows Body inlet fitting 17 and determine vortex 20 hermetically connect between determine vortex 20 and dynamic vortex 30 a series of compression chamber C1, The compression chamber C1 positioned at outermost radial outside in C2 and C3 supplies working fluid to be compressed.

Driving mechanism 40 for example may include the motor being made of stator 42 and rotor 43.Stator 42 can use any conjunction Suitable mode is fixed relative to shell 10.Rotor 43 can rotate in stator 42 and be provided with drive shaft 45.Driving Axis 45 is supported by main bearing seat 50 and step 60.One end of drive shaft 45 is formed with eccentric crank pin 46.Eccentric crank pin 46 cooperate in the hub 32 of dynamic vortex 30 via unloading bushing 48 to drive dynamic vortex 30.Lubrication is also formed in drive shaft 45 Oily channel 47.One end (i.e. the lower end of drive shaft 45) of the grease channel 47 is located at the oil-way formed on the downside of shell 10 In.Oil pumping device 49 can be set at the end of grease channel 47.

In the normal work of compressor 100, determine vortex 20 and dynamic vortex 30 must be engaged with each other just in the axial direction Working fluid can be compressed.In addition, in order to provide certain axial elasticity to scroll component to increase the reliable of compressor Property and safety, usually one of determine vortex 20 and dynamic vortex 30 be arranged back pressure cavity so that determine vortex 20 and dynamic whirlpool Rotation 30 can under the action of back pressure positive engagement each other.

In the compressor design shown in Fig. 1 and 2, back pressure cavity B setting is in 30 side of dynamic vortex and is located at main bearing seat 50 In interior space.In other words, back pressure cavity B is formed in opposite second side of dynamic vortex end plate 34 and is suitable for dynamic vortex end plate 34 second side applies back pressure so that dynamic vortex 30 is engaged with determine vortex 20.In particular, back pressure cavity B by main bearing seat 50 with Determine vortex 20 and dynamic vortex 30 collectively form.More specifically, at least part and main bearing seat of the peripheral wall portion 22 of determine vortex 20 50 first part 52 sealingly engages to form the first sealing S1, and at least part of the hub 32 of dynamic vortex 30 with The second part 54 of main bearing seat 50 is sealingly engaged to form the second sealing S2.It can be in the region of the second sealing S2 The elastic sealing element that can be deformed in the axial direction is set to adapt to the axial displacement of dynamic vortex 30 described below or topple. Substantially closed back pressure cavity B is formed between main bearing seat 50, determine vortex 20 and dynamic vortex 30 as a result,.In addition, back pressure cavity B is passed through By the intercommunicating pore 35 and compression chamber C2 in intermediate pressure in for example a series of compression chambers being formed in dynamic vortex end plate 34 Thus connection gathers back pressure in back pressure cavity B.

In the normal operation of compressor, the resultant force that back pressure in back pressure cavity B is formed be greater than compression chamber C1, C2 and The resultant force of the pressure initiation of working fluid in C3, so that dynamic vortex 30 connects each other in the axial direction with determine vortex 20 It closes.And for example when compressor is under the operating conditions such as liquid hammer, the pressure initiation of the working fluid in compression chamber C1, C2 and C3 Resultant force will be greater than the resultant force that back pressure in back pressure cavity B is formed, and thus dynamic vortex 30 and determine vortex 20 be in the axial direction each other Separate and predetermined distance d or topple, such as shown in figure 3, to be each compression chamber pressure release, thus protect compression mechanism not by It destroys.

However in the case of figure 3, the back pressure in back pressure cavity B (it is greater than pressure of inspiration(Pi)) can be via determine vortex 20 Clearance G between dynamic vortex 30 leaks into the compression chamber C1 in pressure of inspiration(Pi), and thus back pressure reduces.If back pressure What is leaked is more, then determine vortex 20 is possible to not to be engaged with each other with dynamic vortex 30, so that compression mechanism can not work normally.Separately Outside, due to the pressure change or fluctuation in compression chamber C2, even compressor, in course of normal operation, there is also due to back pressure Pressure reduction in chamber and a possibility that cause dynamic vortex 30 to be toppled.

In order to avoid determine vortex 20 in these cases can not be engaged with dynamic vortex 30, (in other words, dynamic vortex is inclined Cover), technical staff attempts the resultant force for example, by increasing the back pressure in back pressure cavity such as under type: 1) changing intercommunicating pore 34 Position is connected to it with the higher compression chamber of pressure, to provide higher back pressure for back pressure cavity;2) increase intercommunicating pore 34 Aperture is to reduce the throttling action of connecting hole, so that the pressure in compression chamber C2 can be quickly and with bigger traffic flow Enter into back pressure cavity;3) increase the forced area of dynamic vortex end plate to provide the resultant force of back pressure.Although aforesaid way can be effective Raising dynamic vortex born for make that it engage with determine vortex it is axial improve the resistance to capsizing of dynamic vortex with joint efforts, but It is the increase for the contact pressure that the increase of axial resultant force inevitably results in the contact surface between dynamic vortex and determine vortex, to make to press The power consumption of contracting machine increases, and Energy Efficiency Ratio (EER) reduces.In addition, excessive wear can also occur for these contact surfaces, to reduce scroll portion The life and reliability of part.

For this purpose, inventor proposes that pressure introduction passage is arranged in compression mechanism CM and enables pressure introduction passage Pressure in back pressure cavity B and shell 10 is greater than the presumptive area of the pressure of inspiration(Pi) (preferably more than back pressure) of screw compressor Between selective fluid communication is provided.In particular, the pressure introduction passage can be configured to: when dynamic vortex 30 is toppled Between back pressure cavity B and presumptive area formed be in fluid communication, and when dynamic vortex 30 engage with determine vortex 20 cutting back pressure cavity and Fluid communication between presumptive area.It, can be big by pressure via pressure introduction passage as a result, when dynamic vortex 30 is toppled It extraly and/or is rapidly added in back pressure cavity in the working fluid of pressure of inspiration(Pi), so as to effectively make up back pressure cavity In pressure leakage or the pressure loss so that dynamic vortex 30 rapidly and/or reliably connects with determine vortex 20 again It closes.On the other hand, the fluid communication when dynamic vortex 30 is engaged with determine vortex 20 between back pressure cavity and presumptive area is cut off, institute It is only related and unrelated with the pressure in the presumptive area to the pressure in such as compression chamber C2 with the pressure in back pressure cavity, change speech It, there is no extraly increased the pressure when compressor runs well in back pressure cavity.Dynamic vortex is avoided as a result, and determines whirlpool Excessive wear between rotation improves the Energy Efficiency Ratio and reliability of compressor.Further, since only need to determine vortex or dynamic vortex into The a small amount of machining of row, which for example drills, can be realized said effect, and the manufacturing cost of scroll element can't significantly improve.

In the first embodiment of the invention shown in figures 4 and 5, pressure introduction passage p-shaped is in determine vortex 20. Specifically, pressure introduction passage P can be structured as at least one hole 25 being formed in the peripheral wall portion 22 of determine vortex 20.Hole 25 One end 251 is open to the presumptive area in shell 10, and the other end 252 in hole 25 is leading to the peripheral wall portion 22 of determine vortex 20 with dynamic whirlpool The end face of 20 engagement of rotation, thus the other end 252 in hole 25 can be by dynamic vortex end plate when dynamic vortex 20 is engaged with determine vortex 30 34 closings.Here, presumptive area can be the pressure at expulsion area in shell.The shape in hole 25 is not limited to linear shown in figure Formula, but can be broken line or any other form, as long as the one end in hole is connected to the intracorporal pressure at expulsion area of shell, and hole is another One end can be closed by dynamic vortex end plate.Make the one end in its hole 25 in determine vortex for example, hole 25 can be shaped generally as L shape Peripheral wall portion lateral surface opening to introduce pressure at expulsion or at the wall surface of the exhaust outlet 28 of determine vortex end plate to back pressure cavity Opening is to introduce possible higher pressure, and the other end is in the bottom opening of the peripheral wall portion of determine vortex.For another example hole 25 can be with shape There is a side opening of determine vortex blade in the formation of determine vortex end plate as generally U-shaped one end for making its hole 25, and the other end is same Sample the peripheral wall portion of determine vortex bottom opening, it is possible thereby to which the fluid in one of compression chamber is introduced into back pressure cavity.

As a result, as described above, when dynamic vortex 30 is toppled, pressure at expulsion is via the hole pressure introduction passage P(25) draw Enter into back pressure cavity, so that dynamic vortex 30 rapidly and/or is reliably re-engaged with determine vortex 20.Another party Face, the hole pressure introduction passage P(25 when dynamic vortex 30 is engaged with determine vortex 20) it is closed by dynamic vortex end plate 34, so exhaust pressure Power will not be extraly introduced into back pressure cavity, to will not increase the pressure of back pressure cavity.

The quantity in hole 25 is not limited to as shown in the figure, on the contrary, for example can only be arranged 1 in the peripheral wall portion 22 of determine vortex 20 Hole 25, or multiple hole 25(can be equably set along the circumferential direction of determine vortex for example in the 4th reality as shown in Figure 10 Apply in mode, be provided with 3 holes 25) the working fluid of sufficient amount can be supplied in any topple.

It, can be on the end face opposite with dynamic vortex end plate 34 of the peripheral wall portion 22 of determine vortex 20 in a kind of preferred embodiment Form at least one groove 27 being in fluid communication with the other end 252 at least one hole 25.At least one described groove 27 can be with Extend along circumferential direction in the peripheral wall portion of determine vortex.It, can be in addition, for example in the 4th embodiment as shown in Figure 10 Determine vortex 20 peripheral wall portion 22 on the opposite end face of dynamic vortex end plate 34 be arranged quantity it is corresponding with the quantity in hole 25 Groove 27, such as three grooves 27.In addition, above-mentioned groove also can be set in dynamic vortex 30.Such as shown in Figure 11 originally In 5th embodiment of invention, it can be formed on the end face opposite with the peripheral wall portion 22 of determine vortex 20 of dynamic vortex end plate 34 At least one groove 37 being in fluid communication with the other end 252 at least one hole 25 for example shown in fig. 5.In the example of Figure 11 In, groove 37 is formed as 3 corresponding with the quantity in hole 25.In particular, groove 37 can be formed in dynamic vortex 30 carry out it is flat Turn is moved on the motion profile of process mesoporous 25 to keep being in fluid communication with hole 25.

The working fluid of enough flows can be provided when further, in order to guarantee that dynamic vortex is toppled to back pressure cavity, It can rationally be set with the length of the quantity of device to hole 27, aperture, the pressure size of presumptive area and groove 27 and/or area etc. Meter is to meet pre-provisioning request.For example, total perimeter of at least one above-mentioned groove 27 can be set into and be substantially equal to dynamic vortex 20 Outer diameter.

Fig. 6 and 7 shows second embodiment according to the present invention, and in this embodiment, pressure introduction passage P includes It is formed at least one hole 33 in dynamic vortex blade 36, the one end 331 in hole 33 is open to back pressure cavity B, and the other end in hole 33 332 can be closed when dynamic vortex 30 is engaged with determine vortex 20 by determine vortex end plate 24.For example, the other end 332 in hole 33 can be with On the end face of dynamic vortex blade 36.Similar with the description in first embodiment, the shape in hole 33 and position are not limited to figure Shown in, but can be rationally designed according to the size of the pressure wished to introduce into.In this case, in compressor housing Presumptive area can be any one of a series of compression chamber C1, C2, C3, such as positioned at the compression chamber C3 of radially inner side.Together Sample, at least one be in fluid communication with the other end 332 at least one hole 33 can be formed on the end face of dynamic vortex blade 36 A groove 37.At least one groove 37 can extend along the hand of spiral of dynamic vortex blade 36.In addition, at least one groove 37 The outer diameter for being substantially equal to dynamic vortex 30 can be set into total perimeter.

In addition, pressure introduction passage P may include being formed in the third embodiment of the present invention as shown in Fig. 8 and 9 Multiple such as three holes 33 and the groove 37 for being respectively communicated with this some holes 33 or being connected to simultaneously in dynamic vortex blade 36.

The technical effect being similar with first embodiment may be implemented in the construction of second embodiment and third embodiment, Details are not described herein.

Although those skilled in the art should manage described above is numerous embodiments of the invention and many aspects Some aspects of the invention can be made further modification and/or improvement by solution.

It may include: shell for example, according to a preferred aspect of the present invention, providing a kind of screw compressor;If It sets in the intracorporal compression mechanism of the shell, the compression mechanism includes determine vortex and dynamic vortex, wherein the determine vortex includes fixed Vortex end plate and the determine vortex blade for being formed in first side of determine vortex end plate, the dynamic vortex includes dynamic vortex end plate and shape At the dynamic vortex blade in first side of dynamic vortex end plate, and the wherein determine vortex blade and the dynamic vortex blade phase It is inter-engaging with formed therebetween it is a series of can be to the compression chamber that fluid is compressed;Main bearing seat, the main bearing seat are suitable for Support the determine vortex;Back pressure cavity, the back pressure cavity be formed in opposite second side of the dynamic vortex end plate and be suitable for Second side of the dynamic vortex end plate applies back pressure so that the dynamic vortex is engaged with the determine vortex;And pressure introduces Channel, the pressure introduction passage be arranged in the compression mechanism and can the back pressure cavity with it is pre- in the shell Determine to form selective fluid communication between region, wherein the pressure of the presumptive area is greater than the air-breathing of the screw compressor Pressure.

For example, another preferred aspect according to the present invention, the pressure introduction passage be can be configured to: in the dynamic whirlpool Rotation forms fluid communication when toppling between the back pressure cavity and the presumptive area, and the dynamic vortex with it is described fixed Be vortexed the fluid communication cut off between the back pressure cavity and the presumptive area when engaging.

For example, another preferred aspect according to the present invention, the pressure introduction passage can be formed in the determine vortex In.

For example, another preferred aspect according to the present invention, the pressure introduction passage may include be formed in it is described fixed At least one hole in the peripheral wall portion of vortex, the open at one end in the hole is to the presumptive area, and the other end in the hole is in institute Stating can be closed when dynamic vortex is engaged with the determine vortex by the dynamic vortex end plate.

For example, another preferred aspect according to the present invention, the presumptive area can be the intracorporal exhaust pressure of the shell Power area.

For example, another preferred aspect according to the present invention, the determine vortex peripheral wall portion with the dynamic vortex end It could be formed at least one groove being in fluid communication with the other end at least one hole on the opposite end face of plate.It is preferred that Ground, at least one described groove can extend along circumferential direction in the peripheral wall portion of the determine vortex.It is further preferred that described Total perimeter of at least one groove may be approximately equal to the outer diameter of the dynamic vortex.

For example, another preferred aspect according to the present invention, in the peripheral wall with the determine vortex of the dynamic vortex end plate It could be formed at least one groove being in fluid communication with the other end at least one hole on the opposite end face in portion.

For example, another preferred aspect according to the present invention, the pressure introduction passage may include being formed in described move At least one hole in volution blade, the open at one end in the hole is to the back pressure cavity, and the other end in the hole is in the dynamic whirlpool Rotation can be closed when engaging with the determine vortex by the determine vortex end plate.

For example, another preferred aspect according to the present invention, the presumptive area can be in a series of compression chambers The compression chamber positioned at radially inner side.

For example, another preferred aspect according to the present invention, could be formed on the end face of the dynamic vortex blade with At least one groove that the other end at least one hole is in fluid communication.Preferably, at least one described groove can be along institute The hand of spiral for stating dynamic vortex blade extends.It is further preferred that total perimeter of at least one groove can be waited substantially In the outer diameter of the dynamic vortex.

For example, another preferred aspect according to the present invention, the back pressure cavity can be formed in the main bearing seat A compression chamber in intercommunicating pore and a series of compression chambers in space and in the dynamic vortex end plate It is in fluid communication.

For example, another preferred aspect according to the present invention, at least part of the peripheral wall portion of the determine vortex can be with The first part of the main bearing seat sealingly engages to form the first sealing, and at least the one of the hub of the dynamic vortex Part can be sealingly engaged with the second part of the main bearing seat to form the second sealing.

For example, another preferred aspect according to the present invention, the screw compressor may further include fluid inlet Accessory, the fluid inlet accessory are hermetically connect with the determine vortex.

For example, another preferred aspect according to the present invention, the screw compressor can be high side compressors.

Although various embodiments of detailed description of the present invention herein, it should be appreciated that the invention is not limited to this In the specific embodiment being described in detail and show, without departing from the spirit and scope of the present invention can be by this field Technical staff realizes other modifications and variant.All these modifications and variant are within the scope of the present invention.Moreover, all Component described herein can be replaced by component equivalent in other technologies.

Claims (15)

1. a kind of screw compressor (100), comprising:
Shell (10);
The compression mechanism (CM) being arranged in the shell (10), the compression mechanism (CM) include determine vortex (20) and dynamic vortex (30), wherein the determine vortex (20) includes determine vortex end plate (24) and is formed in determining for (24) first side of determine vortex end plate Volution blade (26), the dynamic vortex (30) include dynamic vortex end plate (34) and are formed in (34) first side of dynamic vortex end plate Dynamic vortex blade (36), and wherein the determine vortex blade (26) and the dynamic vortex blade (36) are interconnected at it Between formed it is a series of can be to the compression chamber that fluid is compressed;
Main bearing seat (50), the main bearing seat (50) are suitable for supporting the determine vortex (20);
Back pressure cavity (B), the back pressure cavity (B) are formed in opposite second side of the dynamic vortex end plate (34) and are suitable for institute The second side for stating dynamic vortex end plate applies back pressure so that the dynamic vortex (30) is engaged with the determine vortex (20);And
Pressure introduction passage (P), the pressure introduction passage (P) are arranged in the compression mechanism (CM) and can be described Selective fluid communication is provided between presumptive area in back pressure cavity (B) and the shell (10), wherein the presumptive area Pressure be greater than the screw compressor pressure of inspiration(Pi),
Wherein the pressure introduction passage (P) is configured to: when the dynamic vortex (30) is toppled the back pressure cavity (B) with It is formed and is in fluid communication between the presumptive area, and when the dynamic vortex (30) is engaged with the determine vortex (20) described in cutting Fluid communication between back pressure cavity (B) and the presumptive area,
Wherein the pressure introduction passage (P) is formed in the determine vortex (20),
Wherein the back pressure cavity (B) is formed in the space in the main bearing seat (50) and through the formation of the dynamic vortex A compression chamber in intercommunicating pore (35) and a series of compression chambers in end plate (34) is in fluid communication.
2. screw compressor as described in claim 1, wherein the pressure introduction passage (P) includes being formed in the determine vortex (20) at least one hole (25) in peripheral wall portion (22), one end (251) of the hole (25) are open to the presumptive area, institute The other end (252) for stating hole (25) can be by the dynamic vortex end when the dynamic vortex (30) is engaged with the determine vortex (20) Plate (34) closing.
3. screw compressor as claimed in claim 2, wherein the presumptive area is the intracorporal pressure at expulsion area of the shell.
4. screw compressor as claimed in claim 2, wherein the determine vortex (20) peripheral wall portion (22) with it is described dynamic It is formed on the opposite end face of vortex end plate (34) and is in fluid communication at least with the other end (252) at least one hole (25) One groove (27).
5. screw compressor as claimed in claim 4, wherein at least one described groove (27) is in the determine vortex (20) Peripheral wall portion extends along circumferential direction in (22).
6. screw compressor as claimed in claim 5, wherein total perimeter of at least one groove (27) is substantially equal to The outer diameter of the dynamic vortex (30).
7. screw compressor as claimed in claim 2, wherein in the dynamic vortex end plate (34) and the determine vortex (20) The opposite end face of peripheral wall portion (22) on be formed with and be in fluid communication at least with the other end (252) at least one hole (25) One groove (37).
8. screw compressor as described in claim 1, wherein the pressure introduction passage (P) includes being formed in the dynamic vortex At least one hole (33) in blade (36), one end (331) of the hole (33) are open to the back pressure cavity (B), the hole (33) the other end (332) can be by the determine vortex end plate when the dynamic vortex (30) is engaged with the determine vortex (20) (24) it closes.
9. screw compressor as claimed in claim 8, wherein the presumptive area is being located in a series of compression chambers The compression chamber of radially inner side.
10. screw compressor as claimed in claim 8, wherein being formed on the end face of the dynamic vortex blade (36) and institute State at least one groove (37) that the other end (332) at least one hole (33) is in fluid communication.
11. screw compressor as claimed in claim 10, wherein at least one described groove (37) is along the dynamic vortex blade (36) the hand of spiral extends.
12. screw compressor as claimed in claim 10, wherein total perimeter of at least one groove (37) is substantially etc. Outer diameter in the dynamic vortex (30).
13. screw compressor as described in claim 1, wherein at least part of the peripheral wall portion (22) of the determine vortex (20) It sealingly engages with the first part (52) of the main bearing seat (50) to form the first sealing (S1), and the dynamic vortex (30) at least part of hub (32) is sealingly engaged with the second part (54) of the main bearing seat (50) to form Two sealings (S2).
14. it further comprise fluid inlet accessory (17) such as screw compressor of any of claims 1-13, it is described Fluid inlet accessory (17) is hermetically connect with the determine vortex (20).
15. such as screw compressor of any of claims 1-13, wherein the screw compressor is high pressure side compression Machine.
CN201310680416.8A 2013-12-12 2013-12-12 Screw compressor CN104712556B (en)

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Application Number Priority Date Filing Date Title
CN201310680416.8A CN104712556B (en) 2013-12-12 2013-12-12 Screw compressor
PCT/CN2014/088630 WO2015085823A1 (en) 2013-12-12 2014-10-15 Scroll compressor

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CN104712556A CN104712556A (en) 2015-06-17
CN104712556B true CN104712556B (en) 2019-06-25

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Publication number Priority date Publication date Assignee Title
EP3467311A4 (en) * 2016-05-27 2020-01-01 Emerson Climate Technologies (Suzhou) Co., Ltd. Vortex compressor

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DE102012001485A1 (en) * 2011-02-04 2012-08-09 Danfoss Scroll Technologies, Llc Scroll compressor with three outlet valves and outlet pressure extraction to the back pressure chamber
WO2012128499A2 (en) * 2011-03-24 2012-09-27 Lg Electronics Inc. Scroll compressor
CN203614399U (en) * 2013-12-12 2014-05-28 艾默生环境优化技术(苏州)有限公司 Scroll compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5762483A (en) * 1997-01-28 1998-06-09 Carrier Corporation Scroll compressor with controlled fluid venting to back pressure chamber
DE102012001485A1 (en) * 2011-02-04 2012-08-09 Danfoss Scroll Technologies, Llc Scroll compressor with three outlet valves and outlet pressure extraction to the back pressure chamber
WO2012128499A2 (en) * 2011-03-24 2012-09-27 Lg Electronics Inc. Scroll compressor
CN203614399U (en) * 2013-12-12 2014-05-28 艾默生环境优化技术(苏州)有限公司 Scroll compressor

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