CN201486862U - Internal pressure ratio adjusting device of screw type compressor - Google Patents
Internal pressure ratio adjusting device of screw type compressor Download PDFInfo
- Publication number
- CN201486862U CN201486862U CN2009202076279U CN200920207627U CN201486862U CN 201486862 U CN201486862 U CN 201486862U CN 2009202076279 U CN2009202076279 U CN 2009202076279U CN 200920207627 U CN200920207627 U CN 200920207627U CN 201486862 U CN201486862 U CN 201486862U
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- helical
- lobe compressor
- pressure ratio
- pass hole
- exhaust
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Abstract
The utility model relates to an internal pressure ratio adjusting device of a screw type compressor. The internal pressure ratio adjusting device is arranged on a cylinder body of a screw type compressor, a gas discharge cavity is arranged on the screw type compressor, the internal pressure ratio adjusting device is characterized in that the internal pressure ratio adjusting device of the screw type compressor comprises a radial gas discharge bypass cavity arranged on the cylinder body of the screw compressor and a plurality of groups of adjusting mechanisms which are arranged on the position of the radial gas discharge bypass cavity and are communicated with the gas discharge cavity, each group of adjusting mechanisms comprise a plurality of adjusting units, the structure of each adjusting unit is the same and respectively comprises bypass holes which are arranged on the inner wall of the cylinder body of the screw compressor and a regulating valve which is arranged in a mode of being matched with the bypass hole, the upper end of each bypass hole is communicated with a compression cavity of the screw compressor, and the lower end thereof is communicated with the radial gas discharge bypass cavity. The internal pressure ratio adjusting device of the screw type compressor can automatically adjust the radial gas discharge positions according to changes of operation working conditions of the compressor, thereby adjusting the internal compression ration, the internal pressure ratio and the external pressure ratio can be as consistent as possible, additional energy loss can be reduced, the compressor efficiency can be improved, and the gas discharge noise can be lowered.
Description
Technical field
The utility model relates to a kind of inner pressure ratio controlling device of helical-lobe compressor.
Background technique
Screw compressor since have simple in structure, can under the operating mode of big pressure difference or pressure ratio, work, delivery temperature is low, insensitive to wet type compression, have good displacement control characteristic and few easy workout part, maintenance management convenient, advantages such as long service life are used widely at present.
But because the inside and outside pressure ratio of helical-lobe compressor can be different, under the condition that operating conditions changes, the difference of inside and outside pressure ratio can be brought the loss of energy, thereby reduces the efficient of compressor.For this reason, the application bigger to some working conditions change scopes as refrigeration system, can adopt the guiding valve controlling mechanism to regulate inner pressure ratio usually.
Yet there are some problems in existing regulating method.As the complex structure of guiding valve controlling mechanism, the control difficulty is bigger.Though other is comparatively simple to the regulating method structure in axial exhaust aperture, because the area in axial exhaust aperture is limited, DeGrain.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides that a kind of effect is obvious and simple in structure, the inner pressure ratio controlling device of a kind of helical-lobe compressor of compression ratio in the can regulate.The inner pressure ratio controlling device of this helical-lobe compressor can be according to the variation of compressor operating operating mode, automatically exhaust position radially regulated, thus compression ratio in regulating, pressure ratio unanimity inside and outside making as far as possible, reduce additional energy loss, improve compressor efficiency, reduce exhaust sound.
The inner pressure ratio controlling device of a kind of helical-lobe compressor of the utility model, be arranged on the cylinder block of helical-lobe compressor, described helical-lobe compressor is provided with an exhaust cavity, have the initial radial exhaust port on the cylinder block inwall of described helical-lobe compressor, this initial radial exhaust port and described exhaust cavity connect; Be characterized in, radially exhaust bypass cavity and the many groups controlling mechanism that is provided with at described radially exhaust bypass cavity position that the inner pressure ratio controlling device of described helical-lobe compressor is included on the cylinder block of helical-lobe compressor, be positioned at that the scope of the radially exhaust gas region of a plurality of difference compression ratios is provided with, wherein, each radially the exhaust gas region correspondence be provided with one group of controlling mechanism; Described radially exhaust bypass cavity and described exhaust cavity connect; Described every group of controlling mechanism comprises at least one regulon, each regulon structure is identical, comprises that respectively one is arranged on the by-pass hole that is positioned at the top of exhaust bypass cavity radially of helical-lobe compressor cylinder block inwall and the modulating valve that is positioned at radially exhaust by-pass hole below that is equipped with described by-pass hole; The upper end of described each by-pass hole connects with the compression chamber of described helical-lobe compressor and is connected, and its lower end connects with described radially exhaust bypass cavity and is connected.
The inner pressure ratio controlling device of above-mentioned a kind of helical-lobe compressor, wherein, described modulating valve comprises the plug valve adaptive with described by-pass hole, the Returnning spring that is connected bottom plug valve, described Returnning spring is arranged in the described spring seat.
The inner pressure ratio controlling device of above-mentioned a kind of helical-lobe compressor, wherein, corresponding described each by-pass hole respectively is provided with a groove respectively on the cylinder block of the described helical-lobe compressor that is positioned at the below of exhaust bypass cavity radially, described spring seat is made of the bottom of described groove, described Returnning spring is arranged in the described groove, the top of this Returnning spring contacts with the bottom of described plug valve, and its bottom is connected with described spring seat.
The inner pressure ratio controlling device of above-mentioned a kind of helical-lobe compressor, wherein, described Returnning spring also comprises a pouring weight, is arranged between the bottom and spring seat of described Returnning spring; The bottom of described pouring weight and described Returnning spring is connected.
The inner pressure ratio controlling device of above-mentioned a kind of helical-lobe compressor, wherein, described by-pass hole be shaped as inwall circle with the level, the head of described plug valve is the circle with the level with the step complementation of described by-pass hole.
The inner pressure ratio controlling device of above-mentioned a kind of helical-lobe compressor, wherein, described by-pass hole be shaped as inwall banded shape with the level, the head of described plug valve is the with the level banded shape with the step complementation of described by-pass hole.
Because the utility model has adopted above technological scheme, the technique effect of its generation is tangible:
1, on the cylinder block inwall of helical-lobe compressor, be located in the different interior compression ratio range, many group controlling mechanisms are set, every group of controlling mechanism comprises a plurality of by-pass holes and a plurality of modulating valve on the cylinder block inwall that is arranged on helical-lobe compressor, during work, regulate to open and close according to the exhaust cavity actual pressure by each modulating valve, realize according to actual working conditions regulate compressor radially exhaust the position so that realize regulating in the function of compression ratio.
2, because an exhaust bypass cavity radially that on the cylinder block of helical-lobe compressor, is provided with, and radially the position of exhaust bypass cavity is provided with, organizing controlling mechanisms more, radially exhaust gas region is bigger to make helical-lobe compressor, thereby regulating effect is obvious, can effectively reduce the energy loss that inside and outside pressure ratio difference causes.
3, controlling mechanism is regulated automatically according to pressure, and is reliable, and need not external driving mechanism and control system, simple in structure, becomes to drop into originally lower.
Description of drawings
Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is arranged on a kind of embodiment's of helical-lobe compressor structure cut-away view for the inner pressure ratio controlling device of the utility model helical-lobe compressor.
The helical-lobe compressor cylinder block that Fig. 2 offers to circular, as to be arranged in a helical-lobe compressor cylinder block embodiment for the by-pass hole of the inner pressure ratio controlling device of the utility model helical-lobe compressor launches schematic representation.
Fig. 3 offers to launching schematic representation with shape, the helical-lobe compressor cylinder block that is arranged in another embodiment of helical-lobe compressor cylinder block for the by-pass hole of the inner pressure ratio controlling device of the utility model helical-lobe compressor.
Embodiment
See also Fig. 1, Fig. 1 is arranged on a kind of embodiment's of helical-lobe compressor structure cut-away view for the inner pressure ratio controlling device of the utility model helical-lobe compressor.The inner pressure ratio controlling device 1 of a kind of helical-lobe compressor of the utility model, be arranged on the cylinder block 100 of helical-lobe compressor, described helical-lobe compressor comprises cylinder block 100, is arranged on the interior screw rotor 101 of cylinder block, is arranged on the exhaust cavity 102 on the cylinder block, have initial radial exhaust port 103 on the cylinder block inwall of described helical-lobe compressor, this initial radial exhaust port and described exhaust cavity connect, and this initial radial exhaust port contracts than the Position Design of correspondence with reference to the maximum internal pressure that will run in the compressor actual moving process.Radially exhaust bypass cavity 11 and the many groups controlling mechanism that is provided with at described radially exhaust bypass cavity position that the inner pressure ratio controlling device 1 of described helical-lobe compressor is included in that the cylinder block of helical-lobe compressor is provided with.Described radially exhaust bypass cavity is arranged on the cylinder block of helical-lobe compressor, is positioned at the radially exhaust gas region scope that helical-lobe compressor can carry out a plurality of difference compression ratios of different compression ratio adjustment by exhaust radially.Wherein, each radially the exhaust gas region correspondence be provided with one group of controlling mechanism.Described radially exhaust bypass cavity 11 1 end a sealing, the other end b and described exhaust cavity connect.Described every group of controlling mechanism comprises a plurality of regulons, each regulon structure is identical, comprises that respectively one is arranged on the by-pass hole that is positioned at the top of exhaust bypass cavity radially of helical-lobe compressor cylinder block inwall and the modulating valve that is positioned at radially exhaust by-pass hole below that is equipped with described by-pass hole; The upper end of described each by-pass hole connects with the compression chamber of described helical-lobe compressor and is connected, and its lower end connects with described radially exhaust bypass cavity and is connected.By-pass hole offer quantity and shape can design by the model and the working condition of compressor.In the present embodiment according to the determined position range of exhaust radially of compression ratios in different, selected radially exhaust gas region, each radially exhaust gas region one group of controlling mechanism respectively is set, clear for describing, be the structure that representative illustrates each regulon with the regulon 12,13 that respectively is provided with in two groups of controlling mechanisms among Fig. 1.Regulon 12 comprises a by-pass hole 121 and the modulating valve 122 that is equipped with described by-pass hole, this modulating valve 122 comprises the plug valve 1221 adaptive with described by-pass hole, the Returnning spring 1222 that is connected bottom plug valve, described Returnning spring is arranged in the described spring seat 1223.Regulon 13 comprises a by-pass hole 131 and the modulating valve 132 that is equipped with described by-pass hole, this modulating valve 132 comprises the plug valve 1321 adaptive with described by-pass hole, the Returnning spring 1322 that is connected bottom plug valve, described Returnning spring is arranged in the described spring seat 1323.The upper end of described each by-pass hole 121,131 and the compression chamber of described helical-lobe compressor connect, and its lower end and described radially exhaust bypass cavity 11 connect.Corresponding described each by-pass hole respectively is provided with a groove respectively on the cylinder block of the described helical-lobe compressor that is positioned at the below of exhaust bypass cavity radially, spring seat described in the present embodiment is made of the bottom of described groove, described Returnning spring is arranged in the described groove, the top of this Returnning spring contacts with the bottom of described plug valve, and its bottom is connected with described spring seat.Described Returnning spring can also comprise a pouring weight, and this pouring weight is arranged between the bottom and spring seat of described Returnning spring; The bottom of described pouring weight and described Returnning spring is connected.
In unit running process when the initial content of exhaust cavity pressure and design is long-pending more consistent than pairing exhaust cavity force value, the radially exhaust of gas will only be discharged from initial radial vent ports 103, each organize by-pass hole that the regulon of controlling mechanism offers exhaust cavity pressure greater than the situation that is closed gas pressure in the volume under, under the acting in conjunction of pressure reduction and Returnning spring separately, plug valve withstands the by-pass hole aperture, is closed condition.
When operating mode changes, for example in the one group controlling mechanism region of exhaust cavity pressure, be closed under the situation of gas pressure in the volume less than regulon 12, when pressure difference reaches certain value, the plug valve 1221 that by-pass hole on the regulon 12 cylinder block inwalls of this group controlling mechanism is 121 li is backed down under differential pressure action, gas is discharged in the enclosed volume, enters exhaust cavity, realizes exhaust in advance, thereby reduced interior compression ratio, realized regulatory function.When pressure continues to reduce, by that analogy, by-pass hole 131 of the regulon 13 in another group controlling mechanism also will begin exhaust.
When the rising of exhaust cavity pressure, by-pass hole 131 of each regulon 13 is under the acting in conjunction of pressure reduction and Returnning spring 1322 in another group controlling mechanism, and plug valve 1321 will be pushed up back, and by-pass hole 131 is closed.Regulon 12 in having shown one group among Fig. 1 in the controlling mechanism is opening state, and the regulon 13 in another group controlling mechanism is closed condition.When pressure continues to rise, press above working procedure, by-pass hole 121 also will be closed.
See also Fig. 2, the helical-lobe compressor cylinder block that Fig. 2 offers to circular, as to be arranged in the helical-lobe compressor cylinder block a kind of embodiment for the by-pass hole of the inner pressure ratio controlling device of the utility model helical-lobe compressor launches schematic representation.In the present embodiment, on helical-lobe compressor cylinder block inwall, selected the radially exhaust gas region 21,22 of compression ratio in two differences according to the regional extent of the determined radially exhaust of compression ratio in the helical-lobe compressor difference, one of them one group of controlling mechanism that radially is provided with in the exhaust gas region 21 is made of a regulon, has only shown the by-pass hole 23 of regulon among the figure; Another radially exhaust gas region 21 be provided with six regulons, also only shown the circular by-pass hole 24 of these six regulons among the figure.Described by-pass hole be shaped as inwall circle with the level, the head of the described plug valve that corresponding and the shape of described by-pass hole are adaptive also is the circle with the level with the step complementation of by-pass hole, shown in Fig. 1 embodiment.Such by-pass hole is convenient to plug valve and is resetted owing to adopt round structure.Each controlling mechanism is separate simultaneously, and reaction speed is sensitive.
See also Fig. 3, Fig. 3 offers to launching schematic representation with shape, the helical-lobe compressor cylinder block that is arranged in another embodiment of helical-lobe compressor cylinder block for the by-pass hole of the inner pressure ratio controlling device of the utility model helical-lobe compressor.In the present embodiment, on helical-lobe compressor cylinder block inwall, selected the radially exhaust gas region 31,32 of compression ratio in two differences according to the regional extent of the determined radially exhaust of compression ratio in the helical-lobe compressor difference, these two radially respectively are provided with one group of controlling mechanism respectively in the exhaust gas region, every group of controlling mechanism is made of two regulons, only shown the by- pass hole 33,34 of each regulon among the figure.By-pass hole described in the present embodiment be shaped as inwall banded shape with the level, with the head of the adaptive described plug valve of the shape of described by-pass hole also be with the level banded shape with the step complementation of by-pass hole.This type by-pass hole has made full use of the position range of rod radial air vent mouth, can make the effect of adjusting more obvious.
Working principle of the present utility model is: compressor is in actual moving process, when the exhaust cavity pressure and the initial internal pressure of design contract when more consistent than pairing exhaust cavity force value, gas will only be discharged from the initial radial vent ports, other by-pass holes of offering exhaust cavity pressure greater than the situation that is closed gas pressure in the volume under, under the acting in conjunction of pressure reduction and Returnning spring, plug valve is closed condition because the by-pass hole aperture is withstood in the effect of step.
In case operating mode changes, be closed under the situation of gas pressure in the volume at exhaust cavity pressure less than some zone, when pressure difference reaches certain value, plug valve in the by-pass hole on this zone inside cylinder inboard wall of cylinder block is backed down under differential pressure action, gas is discharged in the enclosed volume, enter exhaust cavity, realize exhaust in advance.Thereby reduced interior compression ratio, made inside and outside pressure ratio trend consistent, realized regulatory function.By-pass hole in exhaust cavity pressure rises, and some is regional is under the acting in conjunction of pressure reduction and Returnning spring, and plug valve will be pushed up back again, and the aperture is closed, and interior compression ratio also rises thereupon, makes inside and outside pressure ratio trend unanimity.This controlling device promptly is the action by plug valve, regulates the switching of bypass aperture, thereby has realized the regulatory function of interior compression ratio.
The above only is preferred embodiment of the present utility model, and is all according to wait changing of doing of claim of the present utility model and modify, and all should belong to the scope that the utility model is contained.
Claims (6)
1. the inner pressure ratio controlling device of a helical-lobe compressor, be arranged on the cylinder block of helical-lobe compressor, described helical-lobe compressor is provided with an exhaust cavity, has the initial radial exhaust port on the cylinder block inwall of described helical-lobe compressor, and this initial radial exhaust port and described exhaust cavity connect; It is characterized in that, radially exhaust bypass cavity and the many groups controlling mechanism that is provided with at described radially exhaust bypass cavity position that the inner pressure ratio controlling device of described helical-lobe compressor is included on the cylinder block of helical-lobe compressor, be positioned at that the scope of the radially exhaust gas region of a plurality of difference compression ratios is provided with, wherein, each radially the exhaust gas region correspondence be provided with one group of controlling mechanism; Described radially exhaust bypass cavity and described exhaust cavity connect; Described every group of controlling mechanism comprises at least one regulon, each regulon structure is identical, comprises that respectively one is arranged on the by-pass hole that is positioned at the top of exhaust bypass cavity radially of helical-lobe compressor cylinder block inwall and the modulating valve that is positioned at radially exhaust by-pass hole below that is equipped with described by-pass hole; The upper end of described each by-pass hole connects with the compression chamber of described helical-lobe compressor and is connected, and its lower end connects with described radially exhaust bypass cavity and is connected.
2. the inner pressure ratio controlling device of a kind of helical-lobe compressor according to claim 1, it is characterized in that, described modulating valve comprises the plug valve adaptive with described by-pass hole, the Returnning spring that is connected bottom plug valve, described Returnning spring is arranged in the described spring seat.
3. the inner pressure ratio controlling device of a kind of helical-lobe compressor according to claim 2, it is characterized in that, corresponding described each by-pass hole respectively is provided with a groove respectively on the cylinder block of the described helical-lobe compressor that is positioned at the below of exhaust bypass cavity radially, described spring seat is made of the bottom of described groove, described Returnning spring is arranged in the described groove, the top of this Returnning spring contacts with the bottom of described plug valve, and its bottom is connected with described spring seat.
4. the inner pressure ratio controlling device of a kind of helical-lobe compressor according to claim 3 is characterized in that, described Returnning spring also comprises a pouring weight, is arranged between the bottom and spring seat of described Returnning spring; The bottom of described pouring weight and described Returnning spring is connected.
5. the inner pressure ratio controlling device of a kind of helical-lobe compressor according to claim 2 is characterized in that, described by-pass hole be shaped as inwall circle with the level, the head of described plug valve is the circle with the level with the step complementation of described by-pass hole.
6. the inner pressure ratio controlling device of a kind of helical-lobe compressor according to claim 2, it is characterized in that, described by-pass hole be shaped as inwall banded shape with the level, the head of described plug valve is the with the level banded shape with the step complementation of described by-pass hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202076279U CN201486862U (en) | 2009-08-10 | 2009-08-10 | Internal pressure ratio adjusting device of screw type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202076279U CN201486862U (en) | 2009-08-10 | 2009-08-10 | Internal pressure ratio adjusting device of screw type compressor |
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| Publication Number | Publication Date |
|---|---|
| CN201486862U true CN201486862U (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202076279U Expired - Lifetime CN201486862U (en) | 2009-08-10 | 2009-08-10 | Internal pressure ratio adjusting device of screw type compressor |
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| CN (1) | CN201486862U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912800A (en) * | 2015-07-10 | 2015-09-16 | 金鑫 | Stand-alone two-stage variable frequency screw rod compressor with adjustable internal volume ratio |
| CN105386980A (en) * | 2015-11-30 | 2016-03-09 | 珠海格力电器股份有限公司 | Screw compressor and air conditioning system |
| CN112196791A (en) * | 2020-09-30 | 2021-01-08 | 烟台大学 | Energy-saving plug valve and screw compressor comprising same |
| CN114183354A (en) * | 2022-02-16 | 2022-03-15 | 深圳市瑞雪制冷设备有限公司 | Screw type refrigerating machine for ultralow temperature refrigeration |
-
2009
- 2009-08-10 CN CN2009202076279U patent/CN201486862U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912800A (en) * | 2015-07-10 | 2015-09-16 | 金鑫 | Stand-alone two-stage variable frequency screw rod compressor with adjustable internal volume ratio |
| CN105386980A (en) * | 2015-11-30 | 2016-03-09 | 珠海格力电器股份有限公司 | Screw compressor and air conditioning system |
| CN112196791A (en) * | 2020-09-30 | 2021-01-08 | 烟台大学 | Energy-saving plug valve and screw compressor comprising same |
| CN112196791B (en) * | 2020-09-30 | 2023-02-24 | 烟台大学 | Energy-saving plug valve and screw compressor comprising same |
| CN114183354A (en) * | 2022-02-16 | 2022-03-15 | 深圳市瑞雪制冷设备有限公司 | Screw type refrigerating machine for ultralow temperature refrigeration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI QIYAO SCREW MACHINERY CO., LTD. Free format text: FORMER OWNER: THE 711TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRIAL CORPORATION(CSIC) Effective date: 20110713 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201108 NO. 3111, HUANING ROAD, SHANGHAI TO: 200072 NO. 2801, GONGHE NEW ROAD, ZHABEI DISTRICT, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110713 Address after: 200072 No. 2801, Gonghe Road, Shanghai, Zhabei District Patentee after: Shanghai Qiyao Screw Machinery Co., Ltd. Address before: 201108 Shanghai City Huaning Road No. 3111 Patentee before: The 711th Research Institute of China Shipbuilding Industrial Corporation(CSIC) |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |