CN107614879B - Helical-lobe compressor and the refrigerating circulatory device for having the helical-lobe compressor - Google Patents
Helical-lobe compressor and the refrigerating circulatory device for having the helical-lobe compressor Download PDFInfo
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- CN107614879B CN107614879B CN201580080054.6A CN201580080054A CN107614879B CN 107614879 B CN107614879 B CN 107614879B CN 201580080054 A CN201580080054 A CN 201580080054A CN 107614879 B CN107614879 B CN 107614879B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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Abstract
Helical-lobe compressor of the invention includes shell, and the shell has the rudimentary compression unit of compressed gas and further compresses by the advanced compression portion of the gas of rudimentary compressing section compresses；Rotary shaft, the rotary shaft penetrates through rudimentary compression unit and advanced compression portion, and can rotatably configure in shell；Rudimentary screw rotor, the rudimentary screw rotor is installed on the rotary shaft in rudimentary compression unit, and is formed with multiple screw slots in outer peripheral surface；A pair of rudimentary gate rotor, the pair of rudimentary gate rotor are formed with the teeth portion engaged with the screw slot of rudimentary screw rotor, and a pair of rudimentary discharge chambe is formed between the screw slot of rudimentary screw rotor and the shell；And a pair of rudimentary slide valve, the pair of rudimentary spool valve configuration is in a pair of rudimentary discharge chambe, and by moving in the axial direction of the rotation shaft, so as to adjust the opportunity that gas is discharged from rudimentary discharge chambe, a pair of rudimentary slide valve is arranged respectively at different positions in the axial direction of the rotation shaft.
Description
Technical field
The present invention relates to helical-lobe compressors, more specifically, are related to the screw rod pressure for having the slide valve of adjustment operating compression ratio
Contracting machine and the refrigerating circulatory device for having the helical-lobe compressor.
Background technique
In the past, helical-lobe compressor (being more specifically single screw compressor) had on the rotary shaft with spiral helicine spiral shell
The screw rotor of bar slot makes have at least one gate rotor (gate rotor) of tooth socket chimeric with screw rotor in periphery, and
They are housed in shell, to form discharge chambe.Along with the rotation of rotary shaft, the volume of discharge chambe reduces, to press
Contracting gas (referring to patent document 1,2).
The compression mechanism of single screw compressor substantially there are two types of, there is the double-gate for keeping two gate rotors chimeric with screw rotor
Rotor mode and the single gate rotor mode for keeping a gate rotor chimeric with screw rotor.
In double-gate rotor mode, it is respectively formed two discharge chambes opposite to each other centered on the rotary shaft of screw rotor.By
In the opposite position of the rotary shaft that the discharge chambe that gas pressure is acted on is located relative to screw rotor, so acting on rotation
The gas load of axis is cancelled out each other.
In contrast, in single gate rotor mode, discharge chambe is formed in the side of the rotary shaft of screw rotor.In the method
In, since the rotary shaft not as double-gate rotor mode by discharge chambe relative to screw rod configures opposite to each other, so discharge chambe
Gas pressure rotary shaft is acted on from discharge chambe side.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2013-92091 bulletin
Patent document 2: No. 4147891 bulletins of Japanese Patent No.
Summary of the invention
Subject to be solved by the invention
In the second level helical-lobe compressor that compression process is divided into two with rudimentary compression unit and advanced compression portion, rudimentary
Compression unit is well known using the compressor of single gate rotor mode using double-gate rotor mode and in advanced compression portion.
In such second level helical-lobe compressor, as noted previously, as gas pressure is acted in rudimentary compression unit
Discharge chambe be located relative to the opposite position of rotary shaft of screw rod, so the gas load for acting on rotary shaft is cancelled out each other,
The flexure of the rotary shaft of screw rod is smaller.
But as described above, the gas pressure of discharge chambe makees rotary shaft from discharge chambe side in advanced compression portion
With.That is, the side and the indoor gas pressure of compression configured due to discharge chambe in rotary shaft are increased to row in advanced compression portion
Pressure out, in contrast, the gas pressure of the opposite side of discharge chambe are the environment of intermediate pressure, thus their differential pressure action in
Rotary shaft.Therefore, in advanced compression portion, due to the gas load generated by the pressure difference, the opposite side of axial rotary discharge chambe is scratched
Song, deflection become larger.
In addition, due to configuring screw rotor in series, so the length of the rotary shaft of second level helical-lobe compressor compares single level machine
Rotary shaft length it is long, the deflection relative to gas load is bigger than single level machine.Therefore, the deflection of rotary shaft further expands
Greatly.
When rotating shaft flexing in advanced compression portion, rotary shaft also generates flexure in rudimentary compression unit, in rudimentary pressure
In the discharge chambe (the discharge chambe side in advanced compression portion) of one side in contracting portion, the internal clearance between screw rotor and shell expands.
In addition, in the discharge chambe (the opposite side with the discharge chambe of advanced side) of another party in rudimentary compression unit, screw rotor and shell
Internal clearance between body reduces.
Then, due in a pair of of discharge chambe of rudimentary compression unit internal clearance it is unequal, so the internal pressure of each discharge chambe
Passage it is different.That is, the discharge chambe for the side that the internal clearance between screw rotor and shell expands is due in compression process
Internal leakage amount increase, so compared with the discharge chambe of another party, internal pressure rises.
Therefore, because the internal pressure of a pair of of discharge chambe of rudimentary compression unit is unequal, so there are the operatings of helical-lobe compressor
The project of efficiency decline.
The present invention is to solve the above subject and make, even if its purpose is to provide one kind to generate each indoor inside of compression
Unequalization in gap is also able to carry out the helical-lobe compressor of high efficiency operating and has the refrigeration cycle dress of the helical-lobe compressor
It sets.
Solution for solving the problem
Helical-lobe compressor of the invention includes shell, and the shell has the rudimentary compression unit and further of compressed gas
It compresses by the advanced compression portion of the gas of rudimentary compressing section compresses；Rotary shaft, the rotary shaft penetrate through rudimentary compression unit and height
Grade compression unit, and can rotatably configure in shell；Rudimentary screw rotor, the rudimentary screw rotor are installed on rudimentary compression
Rotary shaft in portion, and multiple screw slots are formed in outer peripheral surface；A pair of rudimentary gate rotor, the pair of rudimentary gate rotor are formed
There is the teeth portion engaged with the screw slot of rudimentary screw rotor, and forms a pair between the screw slot and shell of rudimentary screw rotor
Rudimentary discharge chambe；And a pair of rudimentary slide valve, the pair of rudimentary spool valve configuration is in a pair of rudimentary discharge chambe, and by rotating
The axis of axis moves up, so as to adjust the opportunity that gas is discharged from rudimentary discharge chambe, axial direction of a pair of rudimentary slide valve in rotary shaft
On be arranged respectively at different positions.
The effect of invention
Even if also can in accordance with the invention it is possible to realize a kind of unequalization for generating each indoor internal clearance of compression
It carries out the helical-lobe compressor of high efficiency operating and has the refrigerating circulatory device of the helical-lobe compressor.
Detailed description of the invention
Fig. 1 is the schematic sectional view of the second level single screw compressor 100 of embodiment 1.
Fig. 2 is the A-A cross-sectional view in Fig. 1 of the rudimentary compression unit 10 of embodiment 1.
Fig. 3 is the B-B cross-sectional view in the Fig. 1 in the advanced compression portion 20 of embodiment 1.
Fig. 4 is the perspective view of the rudimentary slide valve 13 of embodiment 1.
Fig. 5 is the first discharge chambe and the second discharge chambe shown in the rudimentary compression unit of previous second level single screw compressor
Pressure passage explanatory diagram.
Fig. 6 is the first discharge chambe shown in the rudimentary compression unit 10 of the second level single screw compressor 100 of embodiment 1
The explanatory diagram of the pressure of 15a and the second discharge chambe 15b passage.
Fig. 7 is the perspective view of the rudimentary slide valve 213 of embodiment 2.
Specific embodiment
Hereinafter, illustrating the helical-lobe compressor of embodiments of the present invention referring to attached drawing etc..Herein, in all the appended drawings,
Mark same reference numerals part be it is identical or with its comparable part, this is common in the full text of specification.And
And the form of constituent element expressed by specification full text is eventually example, is not limited to these records.
Hereinafter, illustrate the structure of second level single screw compressor 100, the second level single screw compressor 100 be have it is rudimentary
An example of the helical-lobe compressor of the motor part 2 of compression unit 10, advanced compression portion 20 and the above-mentioned each compression unit of driving.
Embodiment 1.
Firstly, illustrating the structure of the second level single screw compressor 100 of embodiment 1.
Fig. 1 is the schematic sectional view of the second level single screw compressor 100 of embodiment 1.
Second level single screw compressor 100 is roughly divided into compression unit 1 and motor part 2.
<compression unit 1>
Compression unit 1 is to be separated into the rudimentary compression unit 10 being accommodated in cylindric shell 100a and advanced compression portion 20
Mode constitute.In the central axial portion of cylindric shell 100a, configured with the rudimentary compression unit 10 of insert and advanced compression
The rotary shaft 3 in portion 20.The low-pressure gas externally supplied from shell 100a is flowed by the first suction inlet 10a and the second suction inlet 10b
Enter to rudimentary compression unit 10, after first compression, is flowed into advanced compression portion 20 and by second-compressed, becomes high pressure gas and send
It is arrived outside shell 100a out.
(rudimentary compression unit 10)
Fig. 2 is the A-A cross-sectional view in Fig. 1 of the rudimentary compression unit 10 of embodiment 1.
Rudimentary compression unit 10, which uses, makes two the first rudimentary rudimentary gate rotor 12b of gate rotor 12a and second and rudimentary screw rod
The chimeric double-gate rotor mode of rotor 11.Rudimentary screw rotor 11 is formed with multiple spiral helicine screw slot 11a in outer peripheral surface.
Rudimentary screw rotor 11 is accommodated in such a way that its outer peripheral surface is contacted with the columned inner wall 100b of shell 100a
In shell 100a.
The rudimentary gate rotor 12b of the rudimentary gate rotor 12a and second of the first of rudimentary compression unit 10 is in rudimentary screw rotor 11
The mode for radially clipping rudimentary screw rotor 11 configure opposite to each other there are two.It is low in the first rudimentary gate rotor 12a and second
The peripheral part of grade gate rotor 12b is formed with multiple teeth portion.
The teeth portion of these the first rudimentary rudimentary gate rotor 12b of gate rotor 12a and second and the screw rod of rudimentary screw rotor 11
Slot 11a engagement, the space between the inner wall 100b of shell 100a forms rudimentary discharge chambe 15.
As shown in Fig. 2, rudimentary discharge chambe 15 is configured opposite to each other centered on rudimentary screw rotor 11, and including low with first
The the first discharge chambe 15a and the second discharge chambe 15b that the grade rudimentary gate rotor 12b of gate rotor 12a and second is accordingly formed.To first
The the first suction inlet 10a and the second suction inlet 10b of discharge chambe 15a and the second discharge chambe 15b supply low-pressure gas are respectively in shell
100a upper opening.First suction inlet 10a and the second suction inlet 10b and rotary shaft 3 are opposite, and in the axial direction of rotary shaft 3, same
One position opening.
Rudimentary slide valve 13, the rudimentary slide valve 13 are configured in the peripheral side of the first discharge chambe 15a and the second discharge chambe 15b
Opportunity of the adjustment discharge in the gas of each compression interior compression.Rudimentary slide valve 13 includes pressing with the first discharge chambe 15a and second
The first rudimentary rudimentary slide valve 13b of slide valve 13a and second that contracting room 15b is respectively correspondingly configured.
As shown in Fig. 2, the first rudimentary rudimentary slide valve 13b of slide valve 13a and second is accommodated in recess portion 100c, the recess portion
100c is formed in the inner wall 100b of shell 100a.Recess portion 100c is the length for the arc-shaped being formed parallel to the axial direction of rotary shaft 3
Groove portion.
The inner peripheral surface 40 of the first rudimentary rudimentary slide valve 13b of slide valve 13a and second and the shell for accommodating rudimentary screw rotor 11
The inner wall 100b of 100a forms same arc surface.In addition, the recess portion 100c of the outer peripheral surface 41 of rudimentary slide valve 13 and shell 100a have
There is same arc surface.
In addition, the first rudimentary rudimentary slide valve 13b of slide valve 13a and second is connect via bar 33 with rudimentary driving mechanism 14.It is low
Grade driving mechanism 14 is, for example, the driving mechanism being made of cylinder body and piston, by flowing into working fluid in cylinder body and making its stream
Out, so that piston slides in cylinder body, it is moved parallel to rudimentary slide valve 13 with rotary shaft 3 via bar 33.
It should be noted that, although the example that rudimentary driving mechanism 14 is made of cylinder body and piston is shown, but as long as energy
It is moved parallel to rudimentary slide valve 13 with rotary shaft 3, other driving mechanisms can be used.
(advanced compression portion 20)
Fig. 3 is the B-B cross-sectional view in the Fig. 1 in the advanced compression portion 20 of embodiment 1.
Advanced compression portion 20 is using the single gate rotor mode for keeping an advanced gate rotor 22 chimeric with advanced screw rotor 21.
Advanced screw rotor 21 is formed with multiple spiral helicine screw slot 21a in peripheral part.
Advanced screw rotor 21 is accommodated in such a way that its outer peripheral surface is contacted with the columned inner wall 100b of shell 100a
In shell 100a.
The advanced gate rotor 22 in advanced compression portion 20 configures one in the radial side of advanced screw rotor 21.Advanced
The peripheral part of gate rotor 22 is formed with multiple teeth portion.
The teeth portion of the advanced gate rotor 22 is engaged with the screw slot 21a of advanced screw rotor 21, in the circle with shell 100a
Space between columnar inner wall 100b forms advanced compression room 25.With rotary shaft 3 it is axially vertical radially, advanced pressure
First discharge chambe 15a of contracting room 25 and rudimentary compression unit 10 configuration is in the same direction.Here same direction refers to and at least exists
The state of advanced compression room 25 and the first discharge chambe 15a is configured with by the side of the imaginary plane of rotary shaft 3.
In advanced compression room 25, it is configured with corresponding advanced slide valve 23.
As shown in figure 3, the advanced slide valve 23 is accommodated in recess portion 100c, the recess portion in the same manner as rudimentary slide valve 13
100c is formed in the inner wall 100b of shell 100a.Recess portion 100c is the length for the arc-shaped being formed parallel to the axial direction of rotary shaft 3
Groove portion.
The outer peripheral surface of the inner peripheral surface 40 of advanced slide valve 23 and advanced screw rotor 21 (accommodates the shell of advanced screw rotor 21
The inner wall 100b of 100a) form same arc surface.In addition, the recess portion 100c of the outer peripheral surface 41 of advanced slide valve 23 and shell 100a have
There is same arc surface.
In addition, advanced slide valve 23 is connect via bar 33 with advanced driving mechanism 24.It is high in the same manner as rudimentary driving mechanism 14
The structure of grade driving mechanism 24 is, for example, the driving mechanism being made of cylinder body and piston, by flowing into working fluid in cylinder body simultaneously
Make its outflow, so that piston slides in cylinder body, is moved parallel to advanced slide valve 23 with rotary shaft 3 via bar.
<structure of slide valve 13,23>
Herein, the shape of rudimentary slide valve 13 and advanced slide valve 23 is described in detail.
Fig. 4 is the perspective view of the rudimentary slide valve 13 of embodiment 1.
As shown in figure 4, rudimentary slide valve 13 is made of valve body 30, guide portion 31, linking part 32 and bar 33.Valve body 30 with
Space between guide portion 31 becomes opening portion 34, and becomes for the medium pressure gas refrigerant outflow from rudimentary discharge chambe 15
Flow path.As described above, valve body 30 and the inner peripheral surface of guide portion 31 40 have the shell 100a with the rudimentary screw rotor 11 of receiving
Inner wall 100b become same arc surface cross sectional shape.In addition, the valve body 30 and outer peripheral surface of guide portion 31 41 has and shell
The recess portion 100c of body 100a becomes the cross sectional shape of same arc surface.Linking part 32 is smaller than valve body 30 and guide portion 31 cuts
Face shape is for example cylindric.
The basic structure of advanced slide valve 23 is identical as rudimentary slide valve 13.But due to advanced compression portion 20 and rudimentary compression
The operating pressure in portion 10 is than different, so the optimum shape of the valve body 30 of advanced slide valve 23 can be set as with rudimentary slide valve 13 not
Same design.
Rudimentary slide valve 13 and advanced slide valve 23 are constituted are as follows: in the recess portion 100c of shell 100a, parallel with rotary shaft 3
It is slid freely in axial direction.
(function of slide valve 13,23)
As a kind of means of the energy-saving in single screw compressor, following technology is disclosed: using the slide valve 13,23,
Make internal capacity than variable.Internal capacity is than being defined as the compression chamber volume (being denoted as Vs below) when sucking is completed and will start
The ratio between compression chamber volume (being denoted as Vd below) before process is discharged (=Vs ÷ Vd).Internal capacity ratio is adjusted, so that according to low
The operating pressure that pressure and high pressure are found out is maximized than lower energy efficiency.
The position of the slide valve in rotary axis direction by controlling screw rotor, is discharged to change gas from compression process
Opportunity adjust internal capacity ratio.It should be noted that compression process is defined as: complete to be flowed into pressure from suction inlet from gas
(position) plays (position) at the time of gas compressed is discharged to outside discharge chambe from the opening portion of slide valve 34 at the time of contracting room
Until time or rotary shaft 3 axial direction on length.
Similarly, in the second level single screw compressor 100 of embodiment 1, internal capacity ratio can also be adjusted to make to transport
Turn pressure ratio optimization, to realize energy conservation.
Due to being used for maximizing energy efficiency in the respective compression stage of rudimentary compression unit 10 and advanced compression portion 20
Best internal capacity than different, so second level single screw compressor 100 is matched in rudimentary compression unit 10, advanced compression portion 20 respectively
Set the slide valve 13,23 that can adjust position.
<configuration of the first rudimentary rudimentary slide valve 13b of slide valve 13a and second>
As a pair of of valve, rudimentary slide valve 13 is made of the first rudimentary rudimentary slide valve 13b of slide valve 13a and second.First is rudimentary
Slide valve 13a is supported by the first bar 33a, and accordingly configures the outer peripheral surface in rudimentary screw rotor 11 with the first discharge chambe 15a.Separately
Outside, the second rudimentary slide valve 13b is supported by the second bar 33b, and is accordingly configured with the second discharge chambe 15b in rudimentary screw rotor 11
Outer peripheral surface.
First bar 33a and the second bar 33b are connect with link plate 17, and the configuration of link plate 17 is in one end of shell 100a
Side.Link plate 17 is connect with rudimentary driving mechanism 14, and with the mobile linkage of rudimentary driving mechanism 14 and in parallel with rotary shaft 3
It is mobile.Then, it is installed on the rudimentary slide valve 13b of the first rudimentary slide valve 13a and second of the first bar 33a and the second bar 33b while sliding
It is dynamic.
Herein, the length of the first bar 33a and the second bar 33b are compared, the first bar 33a is than the second bar 33b long
Length constitute.Then, in the positional relationship on the direction parallel with rotary shaft 3, the first rudimentary slide valve 13a and second is rudimentary
Slide valve 13b is configured in different positions.That is, the first of the low-pressure gas that the first rudimentary slide valve 13a configured in the first discharge chambe 15a
Second suction inlet 10b of low-pressure gas of the suction inlet 10a at a distance from the first rudimentary slide valve 13a than the second discharge chambe 15b and
The short position of the distance of two rudimentary slide valve 13b the, so that compression process (axial direction of time or rotary shaft 3 in rudimentary compression unit 10
On length) slide valve 13b more rudimentary than second be short.More specifically, be configured to the first rudimentary slide valve 13a first opening 34a with
The second opening 34b of the distance of first suction inlet 10a slide valve 13b more rudimentary than second is short at a distance from the second suction inlet 10b.
Due to rudimentary compression unit 10 the first discharge chambe 15a with rotary shaft 3 it is axially vertical radially with advanced pressure
The advanced compression room 25 in contracting portion 20 configures in the same direction, so being configured to the first discharge chambe 15a of 25 side of advanced compression room
Compression process it is shorter than the compression process of the second opposite discharge chambe 15b.
<movement of second level single screw compressor 100>
Then, illustrate the movement of the second level single screw compressor 100 of embodiment 1.
Second level single screw compressor 100 be used in a manner of closed loop by as the condenser of heat exchanger and evaporator,
It configures the expansion valve between these heat exchangers and is piped the refrigerant circuit being formed by connecting.
Drive the motor part 2 of second level single screw compressor 100 from inverter circuit (inverter circuit) reception
It moves signal and starts.
Then, as shown in Figure 1, via evaporator from the low-pressure refrigerant gas externally supplied of shell 100a respectively from
One suction inlet 10a and the second suction inlet 10b is to the first discharge chambe 15a of a pair of of discharge chambe as rudimentary compression unit 10 and second
Discharge chambe 15b supply.
It is completed to the sucking of the low-pressure refrigerant gas of the first discharge chambe 15a and the second discharge chambe 15b on same opportunity,
The gas refrigerant of roughly the same quality is sucked in each discharge chambe.After the completion of sucking, with the rotation of rudimentary screw rotor 11,
The volume of each discharge chambe reduces, and internal pressure is gradually increased.
By becoming the position in the axial direction of rotary shaft 3 for the rudimentary slide valve 13 being arranged in each discharge chambe
Change, so as to adjust the opportunity that the gas refrigerant of the first discharge chambe 15a and the second discharge chambe 15b is discharged from each discharge chambe.It is low
Grade slide valve 13 is adjusted to the position of multiple grades by dedicated rudimentary driving mechanism 14.In addition it is also possible to be can infinitely into
Line position sets the driving device of adjustment, is not limited to multiple grades.
The rudimentary slide valve 13b of the rudimentary slide valve 13a and second of the first of embodiment 1 is constituted are as follows: upper in the axial direction of rotary shaft 3
Difference is set, the compression process of the first discharge chambe 15a is shorter than the compression process of the second opposite discharge chambe 15b.
That is, becoming such as flowering structure: compared with the second discharge chambe 15b, the indoor gas refrigeration of compression of the first discharge chambe 15a
Agent is first discharged from discharge chambe.
When gas refrigerant is discharged from discharge chambe, gas refrigerant is flowed out by the opening portion 34 of rudimentary slide valve.
As shown in Figure 1, from the centre that a pair the first discharge chambe 15a and the second discharge chambe 15b of rudimentary compression unit 10 are discharged
The gas refrigerant of pressure is inhaled into advanced compression portion 20 and collects.Advanced compression portion 20 is single gate rotor mode, than inhaling
The gas refrigerant for entering the intermediate pressure of the high pressure of pressure is inhaled into an advanced compression room 25.
Refrigerant in advanced compression room 25 reduces volume and is compressed, internal pressure with the rotation of advanced screw rotor 21
Rise.Then, become high-pressure gas refrigerant, be discharged from the opening portion 34 of advanced slide valve 23.
The high-pressure gas refrigerant of discharge is flowed into condenser.
During the operating of second level single screw compressor 100, the position adjustment of slide valve 13,23 is carried out.Carry out slide valve 13,
When 23 position adjustment, for example, each sucking pressure of the rudimentary compression unit 10 of control device detection (not shown) and advanced compression portion 20
The speed of power and each discharge pressure, motor part 2, according to the best internal capacity ratio of its detected value operation.At this point, utilizing position
The position that detection means find out current slide valve 13,23 is set, using the position of driving mechanism adjustment slide valve 13,23 to reduce and transport
The difference of obtained best internal capacity ratio, to improve energy efficiency.
<passage of the pressure of the first discharge chambe 15a and the second discharge chambe 15b of rudimentary compression unit 10>
Fig. 5 is the first discharge chambe and the second discharge chambe shown in the rudimentary compression unit of previous second level single screw compressor
Pressure passage explanatory diagram.
Fig. 6 is the first discharge chambe shown in the rudimentary compression unit 10 of the second level single screw compressor 100 of embodiment 1
The explanatory diagram of the pressure of 15a and the second discharge chambe 15b passage.
In Fig. 5 and Fig. 6, the longitudinal axis indicates the internal pressure of the first discharge chambe 15a and the second discharge chambe 15b, and horizontal axis indicates compression
The axial length of the rotary shaft 3 of the time or progress compression process of process.
As described above, with rotary shaft 3 it is axially vertical radially, the advanced compression of second level single screw compressor 100
First discharge chambe 15a of room 25 and rudimentary compression unit 10 configuration is in the same direction.
The second level list of single gate rotor mode is used using double-gate rotor mode and advanced compression portion 20 in rudimentary compression unit 10
In helical-lobe compressor 100, in advanced compression portion 20, the gas pressure of advanced compression room 25 carries out rotary shaft 3 from a direction side
Effect.That is, in advanced compression portion 20, since the configuration of advanced compression room 25 is in the side and advanced compression room 25 of rotary shaft 3
Gas pressure is increased to discharge pressure, in contrast, relative to rotary shaft 3, the gas pressure of the opposite side of advanced compression room 25
Power is the environment of intermediate pressure, so their differential pressure action is in rotary shaft 3.Then, in advanced compression portion 20, due to by the pressure
The gas load that difference generates, rotary shaft 3 are bent to the opposite side of advanced compression room 25, and deflection becomes larger.
In addition, due to configuring screw rotor in series, so the rotation shaft length of second level single screw compressor 100 compares single-stage
The rotation shaft length of machine is long.Then, bigger than single level machine relative to the deflection of gas load.Therefore, the deflection of rotary shaft 3 into
One step expands.Also, using the high refrigerant of the saturation pressure as R410A, gas load is big, to make
The deflection deformation of rotary shaft 3 expands.
In the flexure of 20 rotary shaft 3 of advanced compression portion, rotary shaft 3 also generates flexure in rudimentary compression unit 10, low
In the first discharge chambe 15a (25 side of advanced compression room on the circumferencial direction of rotary shaft 3) of one side of grade compression unit 10, rudimentary spiral shell
Internal clearance between bar rotor 11 and shell 100a expands.In addition, the second discharge chambe of another party in rudimentary compression unit 10
In 15b (side opposite with advanced compression room 25 on the circumferencial direction of rotary shaft 3), rudimentary screw rotor 11 and shell 100a
Between internal clearance reduce.
Then, due to interior in a pair of of discharge chambe of rudimentary compression unit 10 (the first discharge chambe 15a and the second discharge chambe 15b)
Portion gap is unequal, so the passage of the internal pressure of each discharge chambe is different.That is, interior between rudimentary screw rotor 11 and shell 100a
First discharge chambe 15a of portion's gap enlargement since the internal leakage amount in the compression process of the first discharge chambe 15a increases, so
With rudimentary screw rotor 11 compared with the second discharge chambe 15b of the gap shrinks between shell 100a, internal pressure rises.
In the past, the rudimentary slide valve 13a and second of a pair first for being set to the first discharge chambe 15a and the second discharge chambe 15b is low
The opportunity that grade slide valve 13b is opened is identical.Therefore, as shown in figure 5, in the first discharge chambe 15a and the second discharge chambe 15b, compression
Passage in the compression stage of room pressure P is unequal, the running efficiency decline of second level single screw compressor 100.
In addition, as shown in figure 5, rising since internal pressure is easy in the first discharge chambe 15a, so can generate is more than setting row
The overcompression region of pressure out, consumes useless energy.
In the second level single screw compressor 100 of embodiment 1, the first bar 33a of the first rudimentary slide valve 13a is than second
The length of the second bar 33b long of rudimentary slide valve 13b is constituted.That is, the first rudimentary slide valve 13a configuration is in the low of the first discharge chambe 15a
Low-pressure gas of the first suction inlet 10a at a distance from the first rudimentary slide valve 13a than the second discharge chambe 15b of body of calming the anger second is inhaled
Position entrance 10b short at a distance from the second rudimentary slide valve 13b, so that compression process (time or axis in rudimentary compression unit 10
Upward length) slide valve 13b more rudimentary than second be short.More specifically, it is configured to the first opening 34a of the first rudimentary slide valve 13a
It is short at a distance from the second suction inlet 10b with the second opening 34b of slide valve 13b more rudimentary than second at a distance from the first suction inlet 10a.
Therefore, as shown in fig. 6, since the first discharge chambe 15a than the second discharge chambe 15b opens rudimentary slide valve 13 earlier,
It, can be relative to setting discharge pressure equably compressed gas refrigerant so compression indoor pressure P will not excessively rise.
That is, can be realized even if unequalization for generating each indoor internal clearance of compression, it is also able to carry out high efficiency fortune
The second level single screw compressor 100 turned.
In addition, in the embodiment 1, due to using same shape in the first rudimentary rudimentary slide valve 13b of slide valve 13a and second
The component of shape can cut down manufacturing cost so can be manufactured with same mold, processing method.
<effect of the helical-lobe compressor of embodiment 1>
Since the helical-lobe compressor of embodiment 1 includes shell 100a, the shell 100a has the rudimentary of compressed gas
Compression unit 10 and the advanced compression portion 20 for further compressing the gas being had compressed by rudimentary compression unit 10；Rotary shaft 3, the rotation
Axis 3 penetrates through rudimentary compression unit 10 and advanced compression portion 20, and can rotatably configure in shell 100a；Rudimentary screw rotor
11, the rudimentary screw rotor 11 is installed on the rotary shaft 3 in rudimentary compression unit 10, and is formed with multiple screw slots in outer peripheral surface
11a；A pair of rudimentary gate rotor 12, the pair of rudimentary gate rotor 12 is formed with to be nibbled with the screw slot 11a of rudimentary screw rotor 11
The teeth portion of conjunction, and a pair of rudimentary discharge chambe 15 is formed between the screw slot 11a and shell 100a of rudimentary screw rotor 11；And
A pair of rudimentary slide valve 13, the pair of rudimentary slide valve 13 is configured at a pair of rudimentary discharge chambe 15, and passes through the axial direction in rotary shaft 3
Upper movement, so as to adjust the opportunity that gas is discharged from rudimentary compression unit 10, a pair of rudimentary slide valve 13 divides in the axial direction of rotary shaft 3
It is positioned respectively at different positions, so can be realized even if unequalization for generating internal clearance in each rudimentary discharge chambe 15,
Also it is able to carry out the second level single screw compressor 100 of high efficiency operating.
In addition, since above-mentioned helical-lobe compressor is such as flowering structure: including advanced screw rotor 21, the advanced screw rod turns
Son 21 is installed on the rotary shaft 3 in advanced compression room 25, and is formed with multiple screw slot 21a in outer peripheral surface；And one advanced
Gate rotor 22, one advanced gate rotor 22 are formed with the teeth portion engaged with the screw slot 21a of advanced screw rotor 21, and
An advanced compression room 25 is formed between the screw slot 21a and shell 100a of advanced screw rotor 21, in the axial direction with rotary shaft 3
It is vertical radially, the first discharge chambe 15a of a side of advanced compression room 25 and a pair of rudimentary discharge chambe 15 is configured in same side
Upwards, so can be realized following second level single screw compressor 100: though due to advanced compression room 25 gas pressure and each
Unequalization that internal clearance is generated in rudimentary discharge chambe 15 is also able to carry out high efficiency operating.
In addition, due to for such as flowering structure: in above-mentioned helical-lobe compressor, rudimentary discharge chambe 15 has the first discharge chambe 15a
With the second discharge chambe 15b, the second discharge chambe 15b is configured centered on rotary shaft 3 with the first discharge chambe 15a opposite to each other, and one
To rudimentary slide valve 13 by the first rudimentary slide valve 13a configured in the first discharge chambe 15a and configuration the second of the second discharge chambe 15b
Rudimentary slide valve 13b is constituted, in each compression process of the first discharge chambe 15a and the second discharge chambe 15b, the first rudimentary slide valve 13a
The gas in the first discharge chambe 15a is discharged on slide valve 13b more rudimentary than second early opportunity, makes the compression of the first discharge chambe 15a
Process is shorter than the compression process of the second discharge chambe 15b, thus the compression indoor pressure P in the first discharge chambe 15a will not excessively on
It rises, it can be relative to setting discharge pressure equably compressed gas refrigerant.
In addition, since above-mentioned helical-lobe compressor is constituted are as follows: the first suction inlet 10a of supply gas is in the first discharge chambe 15a
Opening, the second suction inlet 10b of supply gas be open in the second discharge chambe 15b, and the first rudimentary slide valve 13a is with making the first compression
First opening 34a of the gas discharge in the 15a of room, the second rudimentary slide valve 13b, which has, is discharged the gas in the second discharge chambe 15b
The second opening 34b, the first suction inlet 10a and the first opening 34a at a distance from be open 34b than the second suction inlet 10b and second
Apart from short, so the compression indoor pressure P in the first discharge chambe 15a will not excessively rise, it can be relative to setting discharge pressure
Equably compressed gas refrigerant.
In addition, since above-mentioned helical-lobe compressor is configured to have the first rudimentary rudimentary slide valve 13b of slide valve 13a and second of driving
Rudimentary driving mechanism 14, the first rudimentary slide valve 13a connect via the first bar 33a with rudimentary driving mechanism 14, the second rudimentary cunning
Valve 13b is connect via the second bar 33b with rudimentary driving mechanism 14, axis of the length in the axial direction of the first bar 33a than the second bar 33b
Upward length is long, so the compression indoor pressure P in the first discharge chambe 15a will not excessively rise, can arrange relative to setting
Equalization of pressure ground compressed gas refrigerant out.
Embodiment 2.
In the second level single screw compressor 100 of embodiment 2, due to the construction of rudimentary slide valve 13 and the length of each bar 33
It is different from embodiment 1, so being mainly illustrated to this respect.
Fig. 7 is the perspective view of the rudimentary slide valve 213 of embodiment 2.
In embodiment 2, configuration in the first discharge chambe 15a and the second discharge chambe 15b of rudimentary compression unit 10 the
The shape of the one rudimentary rudimentary slide valve 213b of slide valve 213a and second is different from the rudimentary slide valve 13 of embodiment 1.
Specifically, in the first rudimentary rudimentary slide valve 213b of slide valve 213a and second shown in Fig. 7, valve body 30 with draw
That leads the maximum distance W1 in portion 31 is sized and configured to difference.Compared with the rudimentary slide valve 13 of embodiment 1, each ruler of valve body 30
It is very little not change.
In addition, the first overall length L of the rudimentary rudimentary slide valve 213b of slide valve 213a and second shown in Fig. 7 and inclining for valve body 30
The height H and width W of inclined portion 30a is same size.
Therefore, when changing maximum distance W1, the width W2 of guide portion 31 can be changed, and changes the broad-ruler of opening portion 34
It is very little.
In the rudimentary slide valve of embodiment 2, the maximum of the first rudimentary slide valve 213a of the first discharge chambe 15a will be set to
Distance W1 is set as the maximum distance W1 long slide valve 213b more rudimentary than be set to the second discharge chambe 15b second.
Then, for the width dimensions of opening portion 34, the first opening 34a of the first rudimentary slide valve 213a is more rudimentary than second
The second opening 34b of slide valve 213b is big.
In addition, having bar 33 in one end of rudimentary slide valve 213, but in the same manner as the rudimentary slide valve 13 of embodiment 1
The length of each bar 33 is same size in the one rudimentary rudimentary slide valve 213b of slide valve 213a and second.
Second due to the width dimensions slide valve 213b more rudimentary than second of the first opening 34a of the first rudimentary slide valve 213a opens
The width dimensions of mouth 34b are big, open rudimentary slide valve 213 earlier than the second discharge chambe 15b so becoming the first discharge chambe 15a
Structure.That is, the time of compression process of the first discharge chambe 15a in the axial direction of rotary shaft 3 or the length in the axial direction of compression process
The length spent in the time of compression process than the second discharge chambe 15b or the axial direction of compression process is short.
More specifically, it is configured to first opening 34a ratio at a distance from the first suction inlet 10a of the first rudimentary slide valve 213a
The second opening 34b of second rudimentary slide valve 213b is short at a distance from the second suction inlet 10b.
<effect of the helical-lobe compressor of embodiment 2>
In the helical-lobe compressor of embodiment 2, the first rudimentary slide valve 213a, which has, arranges the indoor gas of the first compression
The first opening 34a, the second rudimentary slide valve 213b out has the second opening 34b that the gas in the second discharge chambe 15b is discharged,
First opening 34a's is configured to than the second opening 34b in the axial direction of rotary shaft 3 in the length in the axial direction of rotary shaft 3
Length is long.That is, the first opening 34a of the first rudimentary slide valve 13a is open at a distance from the first suction inlet 10a of low-pressure gas and becomes
Short position, so that second of the length slide valve 13b more rudimentary than second in the axial direction of the compression process in rudimentary compression unit 10 opens
Mouth 34b is short.
Then, the first rudimentary slide valve 13a of the first discharge chambe 15a is configured in than being configured at the second discharge chambe 15b
The gas in the first discharge chambe 15a is discharged in the opportunity of two rudimentary slide valve 13b morning.
It therefore, can be relative to as shown in fig. 6, the compression indoor pressure P in the first discharge chambe 15a will not excessively rise
Set discharge pressure equably compressed gas refrigerant.
That is, can be realized even if unequalization for generating each indoor internal clearance of compression, it is also able to carry out high efficiency fortune
The second level single screw compressor 100 turned.
The explanation of appended drawing reference
1 compression unit, 2 motor parts, 3 rotary shafts, 10 rudimentary compression units, the first suction inlet of 10a, the second suction inlet of 10b, 11
Rudimentary screw rotor, 11a screw slot, 12 rudimentary gate rotors, the rudimentary gate rotor of 12a first, the rudimentary gate rotor of 12b second, 13 is low
Grade slide valve, the rudimentary slide valve of 13a first, the rudimentary slide valve of 13b second, 14 rudimentary driving mechanisms, 15 rudimentary discharge chambes, 15a first are pressed
Contracting room, the second discharge chambe of 15b, 17 link plates, 20 advanced compression portions, 21 advanced screw rotors, 21a screw slot, 22 advanced locks turn
Son, 23 advanced slide valves, 24 advanced driving mechanisms, 25 advanced compression rooms, 30 valve bodies, 30a rake, 31 guide portions, 32 connections
Portion, 33 bars, the first bar of 33a, the second bar of 33b, 34 opening portions, 34a first are open, and 34b second is open, 40 inner peripheral surfaces, 41 peripheries
Face, 100 second level single screw compressors, 100a shell, 100b inner wall, 100c recess portion, 213 rudimentary slide valves, the rudimentary cunning of 213a first
Valve, the rudimentary slide valve of 213b second.
Claims (6)
1. a kind of helical-lobe compressor, wherein the helical-lobe compressor includes
Shell, the shell have the rudimentary compression unit of compressed gas and further compress the gas by the rudimentary compressing section compresses
The advanced compression portion of body；
Rotary shaft, the rotary shaft penetrates through the rudimentary compression unit and the advanced compression portion, and can rotatably configure in institute
It states in shell；
Rudimentary screw rotor, the rudimentary screw rotor are installed on the rotary shaft in the rudimentary compression unit, and in periphery
Face is formed with multiple screw slots；
A pair of rudimentary gate rotor, the pair of rudimentary gate rotor are formed with the tooth engaged with the screw slot of the rudimentary screw rotor
Portion, and a pair of rudimentary discharge chambe is formed between the screw slot and the shell of the rudimentary screw rotor；
A pair of rudimentary slide valve, the pair of rudimentary spool valve configuration is in the pair of rudimentary discharge chambe, and by the rotary shaft
Axis move up, the opportunity being discharged so as to adjust gas from the rudimentary discharge chambe；
Advanced screw rotor, the advanced screw rotor are installed on the rotary shaft in the advanced compression portion, and in periphery
Face is formed with multiple screw slots；And
One advanced gate rotor, one advanced gate rotor are formed with the tooth engaged with the screw slot of the advanced screw rotor
Portion, and an advanced compression room is formed between the screw slot and the shell of the advanced screw rotor,
The rudimentary discharge chambe has the first discharge chambe and the second discharge chambe, and second discharge chambe is centered on the rotary shaft
It is configured opposite to each other with first discharge chambe,
With the rotary shaft it is axially vertical radially, the advanced compression room and first discharge chambe are configured same
On direction, the pair of rudimentary slide valve is by being configured at the first rudimentary slide valve of first discharge chambe and being configured at second pressure
The rudimentary slide valve of the second of contracting room is constituted,
The helical-lobe compressor has the driving mechanism for driving the first rudimentary slide valve and the second rudimentary slide valve,
The first rudimentary slide valve is connect via the first bar with the driving mechanism,
The second rudimentary slide valve is connect via the second bar with the driving mechanism,
First bar and second bar are configured with when from the rudimentary discharge chambe in advanced compression room side
Same link plate connection, and the length in the axial direction of first bar is configured in the axial direction than second bar
Length it is long,
The first rudimentary slide valve and the second rudimentary slide valve utilize the driving mechanism for driving the link plate via institute
The first bar and second bar are stated along the rotary shaft while being moved.
2. helical-lobe compressor according to claim 1, wherein
In each compression process of first discharge chambe and second discharge chambe, the first rudimentary slide valve is than described
The opportunity of two rudimentary slide valve morning makes the indoor gas discharge of first compression, and makes the compression process ratio of first discharge chambe
The compression process of second discharge chambe is short.
3. helical-lobe compressor according to claim 1 or 2, wherein
First suction inlet of supply gas is open in first discharge chambe, and the second suction inlet of supply gas is in second pressure
Contracting room opening,
The first rudimentary slide valve has the first opening for making the indoor gas discharge of first compression,
The second rudimentary slide valve has the second opening for making the indoor gas discharge of second compression,
Length between first suction inlet and first opening is configured to open than second suction inlet with described second
Length between mouthful is short.
4. helical-lobe compressor according to claim 1 or 2, wherein
The first rudimentary slide valve has the first opening for making the indoor gas discharge of first compression,
The second rudimentary slide valve has the second opening for making the indoor gas discharge of second compression,
Length in the axial direction of first opening is configured to longer than the length in the axial direction of second opening.
5. helical-lobe compressor according to claim 3, wherein
The first rudimentary slide valve has first opening for making the indoor gas discharge of first compression,
The second rudimentary slide valve has second opening for making the indoor gas discharge of second compression,
Length in the axial direction of first opening is configured to longer than the length in the axial direction of second opening.
6. a kind of refrigerating circulatory device, wherein the refrigerating circulatory device has spiral shell according to any one of claims 1 to 5
Bar compressor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/065027 WO2016189648A1 (en) | 2015-05-26 | 2015-05-26 | Screw compressor and refrigeration cycle device comprising screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107614879A CN107614879A (en) | 2018-01-19 |
| CN107614879B true CN107614879B (en) | 2019-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580080054.6A Active CN107614879B (en) | 2015-05-26 | 2015-05-26 | Helical-lobe compressor and the refrigerating circulatory device for having the helical-lobe compressor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6430003B2 (en) |
| CN (1) | CN107614879B (en) |
| TW (1) | TWI626380B (en) |
| WO (1) | WO2016189648A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6800348B2 (en) * | 2017-11-27 | 2020-12-16 | 三菱電機株式会社 | Refrigeration cycle device equipped with a single screw compressor and its single screw compressor |
| JP7044973B2 (en) * | 2018-07-12 | 2022-03-31 | ダイキン工業株式会社 | Screw compressor |
| WO2020026333A1 (en) * | 2018-07-31 | 2020-02-06 | 三菱電機株式会社 | Screw compressor and refrigeration cycle device |
| JP6989811B2 (en) * | 2020-03-31 | 2022-01-12 | ダイキン工業株式会社 | Screw compressor and refrigeration equipment |
| WO2021240605A1 (en) * | 2020-05-25 | 2021-12-02 | 三菱電機株式会社 | Two-stage single-screw compressor, and refrigeration and air-conditioning device |
| WO2024075176A1 (en) * | 2022-10-04 | 2024-04-11 | 三菱電機株式会社 | Screw compressor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2526880B1 (en) * | 1982-05-13 | 1986-07-11 | Zimmern Bernard | SCREW AND PINION MACHINE WITH VARIABLE COMPRESSION RATE |
| US4610613A (en) * | 1985-06-03 | 1986-09-09 | Vilter Manufacturing Corporation | Control means for gas compressor having dual slide valves |
| JPS6258079A (en) * | 1985-09-09 | 1987-03-13 | Daikin Ind Ltd | Capacity control mechanism for screw compressor |
| JP4120733B2 (en) * | 1999-03-10 | 2008-07-16 | 三菱電機株式会社 | Two stage screw compressor |
| US7891955B2 (en) * | 2007-02-22 | 2011-02-22 | Vilter Manufacturing Llc | Compressor having a dual slide valve assembly |
| JP5414345B2 (en) * | 2009-04-28 | 2014-02-12 | 三菱電機株式会社 | Two stage screw compressor |
| US9057373B2 (en) * | 2011-11-22 | 2015-06-16 | Vilter Manufacturing Llc | Single screw compressor with high output |
-
2015
- 2015-05-26 JP JP2017520118A patent/JP6430003B2/en active Active
- 2015-05-26 WO PCT/JP2015/065027 patent/WO2016189648A1/en active Application Filing
- 2015-05-26 CN CN201580080054.6A patent/CN107614879B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2016189648A1 (en) | 2017-12-21 |
| JP6430003B2 (en) | 2018-11-28 |
| TW201641822A (en) | 2016-12-01 |
| WO2016189648A1 (en) | 2016-12-01 |
| TWI626380B (en) | 2018-06-11 |
| CN107614879A (en) | 2018-01-19 |
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