CN207377804U - A kind of double-screw compressor - Google Patents
A kind of double-screw compressor Download PDFInfo
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- CN207377804U CN207377804U CN201721502260.4U CN201721502260U CN207377804U CN 207377804 U CN207377804 U CN 207377804U CN 201721502260 U CN201721502260 U CN 201721502260U CN 207377804 U CN207377804 U CN 207377804U
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- double
- screw compressor
- spring cavity
- increment
- cavity
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- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000001965 increasing effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a kind of double-screw compressor, and the double-screw compressor includes discharge chamber, rotor intermediate cavity and spring cavity；The double-screw compressor further includes draught head protection system；Double-screw compressor provided by the utility model in a state that its increment of load time meets duty requirements, protects system that the spring cavity is made to be in connected state with the discharge chamber by the draught head；When its increment of load is slowly or in the state of being unable to increment of load; it protects system that the spring cavity is made to be less than the rotor intermediate cavity for being vented cavity pressure with pressure by the draught head and is in connected state; thus reduce spring cavity pressure; due to increment of load power be with the pressure of spring cavity be reaction; that is, in a state that the pressure of spring cavity reduces, increment of load power increases; as a result, increase increment of load power, the increment of load time shortens.Moreover, double-screw compressor piping is simple disclosed in the utility model, maintenance cost is low.
Description
Technical field
The utility model is related to Compressor Technology fields, and in particular to a kind of double-screw compressor.
Background technology
At present, double-screw compressor generally uses draught head increment of load.Using draught head increment of load, double-screw compressor is being transported
It is present with the smaller state of suction draught head during row, double-screw compressor can generate increment of load slowly even in this state
Can not increment of load the problem of.
In the prior art, the means to solve the above problems are to add pressure maintenance valve and balance pipe.Such as in freezing unit
On, pressure maintenance valve is arranged in the piping of oil eliminator and condenser, and balance pipe is connected on the pipeline of low-pressure side.
Technical solution of the prior art, the pressure maintenance valve added can cause energy of the double-screw compressor under low voltage difference
Consumption increase, so as to influence the runnability of double-screw compressor；Moreover, in order to which pressure maintenance valve is set to usually require to replace oil
Piping trend from device and condenser, makes piping intricate；In addition, the maintenance cost of pressure maintenance valve is also higher.
In view of this, a kind of double-screw compressor is developed, makes it have draught head defencive function, to prevent suction and discharge pressure difference
The smaller increment of load for influencing double-screw compressor.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of double-screw compressor, the double-screw compressor bag
Include rotor intermediate cavity, discharge chamber and spring cavity；The double-screw compressor further includes draught head protection system；
The draught head protection system includes the first connecting pipeline, the first valve portion is which is provided with, for controlling described first
The conducting or closing of connecting pipeline；When only described first connecting pipeline turns on, the spring cavity is connected with the discharge chamber；
Draught head protection system further includes the second connecting pipeline, which is provided with the second valve portion, for controlling described the
The conducting or closing of two connecting pipelines；When only described second connecting pipeline turns on, the spring cavity connects with the rotor intermediate cavity
It is logical.
Double-screw compressor provided by the utility model, when double-screw compressor normal operation, (its increment of load time meets work
Condition demand) in the state of, first valve portion is in opening, that is to say, that first connecting pipeline is on shape
State, the spring cavity is in connected state with the discharge chamber, at this point, the pressure of the spring cavity is equal to the discharge chamber
Pressure.
In a state that the increment of load of double-screw compressor is slow or is unable to increment of load, first valve portion is closed,
Second valve portion is in opening, that is to say, that first connecting pipeline is in closed state, second communicating pipe
Road is in the conduction state, and the spring cavity is in connected state with the rotor intermediate cavity, at this point, pressure of the spring cavity etc.
It is same as the pressure of the rotor intermediate cavity.
It with the pressure of spring cavity is reaction to be due to increment of load power, that is to say, that the shape that the pressure of spring cavity reduces
Under state, increment of load power increases, moreover, the pressure of the rotor intermediate cavity is less than the pressure of the discharge chamber, solves suction as a result,
The problem of increment of load of double-screw compressor is slow under the smaller state of gas draught head or is unable to increment of load.
Optionally, the double-screw compressor includes guiding valve and the connecting rod for driving the guiding valve；The discharge chamber with
It is formed between the spring cavity and supplies the perforative necking down chamber of the connecting rod；Seal assembly is equipped at the necking down chamber, for obstructing
Spring cavity is stated to connect by the annular gap between the necking down chamber peripheral wall and the connecting rod circumferential surface with the discharge chamber.
Optionally, the seal assembly includes fixes sleeve and cartridge seal part；The fixes sleeve build-in is in the contracting
Neck chamber；The cartridge seal part build-in is in the fixes sleeve.
Optionally, described fixes sleeve one end is embedded in the necking down chamber；Other end setting is axially extended from its end face
Groove, and radially outwardly extending first annular boss is set；
Described cartridge seal part one end is embedded in the fixes sleeve, and the other end sets radially outwardly extending second ring
Shape boss；Second annular boss is embedded in the groove；
The seal assembly further includes annular end plate, and the ring-type end plate is fixed on first annular boss and covers institute
State the opening of groove.
Optionally, first annular boss is respectively provided with screwing through hole with the annular end plate, and the two passes through screw and institute
State the housing connection of necking down chamber end.
Optionally, first annular boss is arranged on the fixes sleeve close to one end of the spring cavity.
Optionally, first valve portion and second valve portion are solenoid valve.
Optionally, the cavity wall of the spring cavity opens up a connecting hole；First connecting pipeline and second communicating pipe
Road is communicated in a connecting line jointly, and passes through the connecting line and be connected to the connecting hole.
Optionally, first connecting pipeline, second connecting pipeline and the connecting line are steel-tube construction.
Optionally, the connecting line is connected with the junction of the connecting hole using ferrule fitting.
Description of the drawings
Fig. 1 is a kind of overall structure diagram of specific embodiment of double-screw compressor provided by the utility model.
Fig. 2 is the stress diagram of the package assembly of guiding valve, connecting rod and piston.
Fig. 3 is the enlarged diagram shown in Fig. 1 at seal assembly.
The reference numerals are as follows in Fig. 1-Fig. 3：
11 rotor intermediate cavities, 12 discharge chambers, 13 spring cavitys, 14 necking down chambers, 15 plunger shafts；
21 first connecting pipelines, 211 first valve portions, 22 second connecting pipelines, 221 second valve portions, 23 connecting lines, 231
Ferrule fitting；
31 guiding valves, 32 connecting rods, 33 pistons；
4 seal assemblies, 41 fixes sleeves, 411 first annular boss, 42 cartridge seal parts, 421 second annular boss, 43
Annular end plate.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
It please refers to Fig.1, Fig. 1 is a kind of overall structure of specific embodiment of double-screw compressor provided by the utility model
Schematic diagram.
As shown in Figure 1, double-screw compressor provided by the utility model includes housing, rotor (figure is equipped in the housing
Not shown in), guiding valve 31, connecting rod 32 and piston 33.
The housing and enclose inlet chamber (not shown), rotor intermediate cavity arranged on the in vivo corresponding component of the shell
11st, 33 chamber 15 of discharge chamber 12, spring cavity 13 and piston.
Wherein, the inlet chamber and the discharge chamber 12 are located at the both sides of the rotor intermediate cavity 11 respectively.The rotor
In the rotor intermediate cavity 11, and the rotor specifically includes parallel a pair of of axis and intermeshing male rotor and cloudy turns
Son is completed from inlet chamber air-breathing by the revolution engagement of the two and the process of discharge chamber 12 will be expelled to after gas compression.Having
In body embodiment, the axis of the male rotor and the female rotor extends in left-right direction.
Wherein, the guiding valve 31, connecting rod 32 and piston 33 are used to adjust double-screw compressor displacement.It is specifically, described
Guiding valve 31 is arranged in parallel with above-mentioned male rotor and above-mentioned female rotor, and 32 one end of connecting rod (diagram left end) is connected to the guiding valve
31st, the other end (diagram right end) is connected to piston 33.
The piston 33 moves in 33 chamber 15 of piston, by connecting rod 32 with movable pulley 31 along above-mentioned female rotor and above-mentioned sun
The axis extending direction (left and right directions) of rotor is mobile, thus changes effective active length of male rotor and female rotor, reaches tune
Save the purpose of double-screw compressor displacement.Also, one end that the connecting rod 32 connects the piston 33 is arranged resetting spring, leads to
It crosses its elastic force and resets the piston 33.Chamber where the resetting spring is above-mentioned spring cavity 13.
Double-screw compressor provided by the utility model further includes draught head protection system, and the draught head protects system bag
The first connecting pipeline 21 is included, which is provided with the first valve portion 211, for controlling the conducting or closing of first connecting pipeline 21；
When only described first connecting pipeline 21 turns on, above-mentioned spring cavity 13 is connected with above-mentioned discharge chamber 12；
The draught head protection system further includes the second connecting pipeline 22, the second valve portion 221 is which is provided with, for controlling
State the conducting or closing of the second connecting pipeline 22；When only second connecting pipeline 22 turns on, above-mentioned spring cavity 13 with above-mentioned turn
Sub- intermediate cavity 11 connects.
The draught head protection system specific work process is as follows：
In the state of double-screw compressor normal operation (its increment of load time meets duty requirements), first valve portion
211 are in opening, that is to say, that first connecting pipeline 21 is in the conduction state, the spring cavity 13 and the row
Air cavity 12 is in connected state, at this point, the pressure of the spring cavity 13 is equal to the pressure of the discharge chamber 12.
In a state that the increment of load of double-screw compressor is slow or is unable to increment of load, first valve portion 211, which is in, closes shape
State, second valve portion 221 are in opening, that is to say, that and first connecting pipeline 21 is in closed state, and described
Two connecting pipelines 22 are in the conduction state, and the spring cavity 13 is in connected state with the rotor intermediate cavity 11, at this point, described
The pressure of spring cavity 13 is equal to the pressure of the rotor intermediate cavity 11.
It please refers to Fig.2, Fig. 2 is the stress diagram of the package assembly of guiding valve, connecting rod and piston.
As shown in Fig. 2, the increment of load power of double-screw compressor is：F increasings=F1+ (F3-F4)-F2-F bullets
Wherein, F1 is determined by the pressure of discharge chamber 12；F2 is determined by the pressure of spring cavity 13；F3-F4 is by inlet chamber and row
The pressure difference of air cavity 12 determines that F bullets are typically set at constant.
In the prior art, discharge chamber 12 and spring cavity 13 cause always in connected state in inlet chamber and discharge chamber 12
The smaller state of pressure difference under, be just present with increment of load power deficiency, so as to occur the increment of load of double-screw compressor slowly or cannot increase
The problem of load.
In comparison, double-screw compressor provided by the utility model protects system using above-mentioned draught head, works as twin-screw
The increment of load of compressor is slow or is unable in the state of increment of load, and spring cavity 13 and pressure are less than among the rotor of 12 pressure of discharge chamber
Chamber 11 connects, and reduces the pressure of spring cavity 13, correspondingly, the F2 determined by 13 pressure of spring cavity reduces, so that increment of load power F
Thus increase has evaded the increment of load of above-mentioned double-screw compressor slowly or has been unable to the risk of increment of load.Also, the utility model carries
The draught head protection system piping of the double-screw compressor of confession is simple, convenient for safeguarding and saving maintenance cost.
What deserves to be explained is above-mentioned second connecting pipeline 22 can also be arranged between spring cavity 13 and inlet chamber,
That is when second valve portion 221 is in opening, the spring cavity 13 is in connected state with the inlet chamber.It should
When understanding, since the pressure of inlet chamber is lower compared to the pressure of rotor intermediate cavity 11, increment of load power is made to increase rapidly, increment of load speed
It spends soon, is not easy to control, in comparison, in the case where not adding the equipment of other control increment of load speed, make described second
Valve portion 221 when being in opening the spring cavity 13 be in connected state with the rotor intermediate cavity 11 and be more convenient for implementing.
In addition, what deserves to be explained is, increment of load slowly or the problem of being unable to increment of load not only exists only in double-screw compressor,
He is also likely to be present the problem using the compressor of draught head increment of load, can also equally set above-mentioned draught head protection system solution
Certainly this problem.
Specifically, above-mentioned first valve portion 211 and above-mentioned second valve portion 221 are solenoid valve, response is rapid, and volume compared with
It is small, convenient for arrangement.
Specifically, the cavity wall of the spring cavity 13 opens up a connecting hole；First connecting pipeline 21 and second company
Siphunculus road 22 is communicated in a connecting line 23 jointly, and passes through the connecting line 23 and be connected to the connecting hole.So set,
It is convenient to carry out, and the arrangement convenient for simplifying piping.
More specifically, first connecting pipeline 21, second connecting pipeline 22 and the connecting line 23 are steel
Pipe structure, in favor of bearing high pressure and erosion medium resistance.
More specifically, the connecting line 23 is connected with the junction of the connecting hole using ferrule fitting 231, beneficial to reality
It is now rapidly assembled and disassembled, and beneficial to high pressure is born, evades junction under high pressure conditions and the risk leaked occur.
It please refers to Fig.1 and Fig. 3, Fig. 3 is the enlarged diagram shown in Fig. 1 at seal assembly.
The 32 perforative necking down chamber of connecting rod is supplied as shown in the figure, being formed between the discharge chamber 12 and the spring cavity 13
14.In order to not influence the movement of connecting rod 32, the peripheral wall radial dimension of the necking down chamber 14 is set greater than to the periphery of connecting rod 32
Face size, that is to say, that there are annular gaps between 32 circumferential surface of 14 peripheral wall of necking down chamber and the connecting rod.The utility model
The double-screw compressor of offer is equipped with seal assembly 4 at the necking down chamber 14, for obstructing the spring cavity 13 and the row
Air cavity 12 is connected by the annular gap.
As shown in the figure, the seal assembly 4 includes fixes sleeve 41 and cartridge seal part 42；41 build-in of fixes sleeve
In the necking down chamber 14；42 build-in of cartridge seal part is in the fixes sleeve 41.It is arranged such convenient for cartridge seal part 42
Fixation, it is convenient to carry out.
Specifically, described 41 one end of fixes sleeve is embedded in the necking down chamber 14；Other end setting is prolonged vertically from its end face
The groove stretched, and radially outwardly extending first annular boss 411 is set.
Also, described 42 one end of cartridge seal part is embedded in the fixes sleeve 41, and the other end is set radially to extension
The second annular boss 421 stretched；Second annular boss 421 is embedded in the groove.
Also, the seal assembly 4 further includes annular end plate 43, and it is annular convex that the ring-type end plate 43 is fixed on described first
Platform 411 and the opening for covering the groove, that is to say, that second annular boss 421 is located at the annular end plate 43 and described
Between the bottom of groove, so set, making the cartridge seal part 42 by axial limiting, the axial movement of connecting rod 32 can be evaded and caused
42 axial float of cartridge seal part is made to influence the risk of sealing effect.
Certainly, above-mentioned groove can also be formed at the annular end plate 43, i.e., from the end face of the annular end plate 43 (with
The face that the outer end face of first annular boss 411 is in contact) it axially extends to be formed.Alternatively, it can also be collectively formed in institute
The first annular boss 411 and the annular end plate 43 are stated, i.e., is partly formed at first annular boss 411, is partly formed at
The ring-type end plate 43.
More specifically, first annular boss 411 is respectively provided with screwing through hole with the annular end plate 43, and the two passes through spiral shell
Nail is connected with the housing (the side chamber wall for illustrating the spring cavity 13) of the end of the necking down chamber 14, in order to improve sealing group
The connection reliability of part 4.
In a particular embodiment, first annular boss 411 is arranged on the fixes sleeve 41 close to the spring cavity 13
One end, corresponding second annular boss 421 and the annular end plate 43 are also arranged on the end, in order to install.Certainly set
The one end for being disposed adjacent to the discharge chamber 12 is also possible.
More specifically, the cartridge seal part 42 can be bearing sealing element, so that it has with certain self-lubricating
Performance.
Double-screw compressor provided by the utility model is described in detail above.It is used herein specifically a
Example is set forth the principle and embodiment of the utility model, and the explanation implemented above is only intended to help to understand this practicality
New method and its core concept.It should be pointed out that for those skilled in the art, this reality is not being departed from
On the premise of with new principle, can also to the utility model, some improvement and modification can also be carried out, these improvement and modification are also fallen into
In the protection domain of the utility model claims.
Claims (10)
1. a kind of double-screw compressor, the double-screw compressor includes rotor intermediate cavity (11), discharge chamber (12) and spring cavity
(13)；It is characterized in that, the double-screw compressor further includes draught head protection system；
The draught head protection system includes the first connecting pipeline (21), which is provided with the first valve portion (211), described for controlling
The conducting or closing of first connecting pipeline (21)；When only described first connecting pipeline (21) turns on, the spring cavity (13) and institute
State discharge chamber (12) connection；
The draught head protection system further includes the second connecting pipeline (22), the second valve portion (221) is which is provided with, for controlling
State the conducting or closing of the second connecting pipeline (22)；Only second connecting pipeline (22) conducting when, the spring cavity (13) with
Rotor intermediate cavity (11) connection.
2. double-screw compressor according to claim 1, which is characterized in that the double-screw compressor includes guiding valve (31)
With for driving the connecting rod of the guiding valve (31) (32)；It is formed between the discharge chamber (12) and the spring cavity (13) described in supplying
The perforative necking down chamber (14) of connecting rod (32)；Seal assembly (4) is equipped at the necking down chamber (14), for obstructing the spring cavity
(13) and the discharge chamber (12) passes through the annular gap between necking down chamber (14) peripheral wall and the connecting rod (32) circumferential surface
Connection.
3. double-screw compressor according to claim 2, which is characterized in that the seal assembly (4) includes fixes sleeve
(41) and cartridge seal part (42)；Fixes sleeve (41) build-in is in the necking down chamber (14)；The cartridge seal part (42)
Build-in is in the fixes sleeve (41).
4. double-screw compressor according to claim 3, which is characterized in that described fixes sleeve (41) one end is embedded in described
Necking down chamber (14)；The groove that other end setting is axially extended from its end face, and radially outwardly extending first ring is set
Shape boss (411)；
Described cartridge seal part (42) one end is embedded in the fixes sleeve (41), and the other end sets radially outwardly extending the
Two annular boss (421)；Second annular boss (421) is embedded in the groove；
The seal assembly (4) further includes annular end plate (43), and the ring-type end plate (43) is fixed on first annular boss
(411) and the opening of the groove is covered.
5. double-screw compressor according to claim 4, which is characterized in that first annular boss (411) with it is described
Annular end plate (43) is respectively provided with screwing through hole, and the two is connected by screw with the housing of necking down chamber (14) end.
6. double-screw compressor according to claim 4, which is characterized in that first annular boss (411) is arranged on institute
Fixes sleeve (41) is stated close to one end of the spring cavity (13).
7. according to claim 1-6 any one of them double-screw compressors, which is characterized in that first valve portion (211) with
Second valve portion (221) is solenoid valve.
8. according to claim 1-6 any one of them double-screw compressors, which is characterized in that the cavity wall of the spring cavity (13)
Open up a connecting hole；First connecting pipeline (21) and second connecting pipeline (22) are communicated in a connecting line jointly
(23), and pass through the connecting line (23) and be connected to the connecting hole.
9. double-screw compressor according to claim 8, which is characterized in that first connecting pipeline (21), described
Two connecting pipelines (22) and the connecting line (23) are steel-tube construction.
10. double-screw compressor according to claim 8, which is characterized in that the connecting line (23) and the connection
The junction in hole is connected using ferrule fitting (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721502260.4U CN207377804U (en) | 2017-11-10 | 2017-11-10 | A kind of double-screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721502260.4U CN207377804U (en) | 2017-11-10 | 2017-11-10 | A kind of double-screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207377804U true CN207377804U (en) | 2018-05-18 |
Family
ID=62332581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721502260.4U Expired - Fee Related CN207377804U (en) | 2017-11-10 | 2017-11-10 | A kind of double-screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207377804U (en) |
-
2017
- 2017-11-10 CN CN201721502260.4U patent/CN207377804U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180518 |