CN203783894U - Low-load starting screw type air compressor - Google Patents
Low-load starting screw type air compressor Download PDFInfo
- Publication number
- CN203783894U CN203783894U CN201420037470.0U CN201420037470U CN203783894U CN 203783894 U CN203783894 U CN 203783894U CN 201420037470 U CN201420037470 U CN 201420037470U CN 203783894 U CN203783894 U CN 203783894U
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- air compressor
- cavity
- pass hole
- power plant
- secondary cavity
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Abstract
The utility model relates to a screw compressor, and provides a low-load starting screw type air compressor. The low-load starting screw type air compressor comprises an outer shell with a main cavity, and two screws which are arranged in the main cavity and are meshed with each other, wherein a plurality of bypass holes are formed in the inner wall of the main cavity; an air inlet and an air exhaust opening are formed in the outer shell; all the bypass holes are positioned between the air inlet and the air exhaust opening; an auxiliary cavity communicated with the bypass holes is also formed in the outer shell; a valve body for blocking the bypass holes is arranged in the auxiliary cavity; a driving mechanism for driving the valve body to block the bypass holes and driven by a power device to work is arranged on the outer shell. According to the low-load starting screw type air compressor, when the power device is started, the auxiliary cavity and the main cavity of the air compressor are communicated with each other through the bypass holes, so that part of air sucked into the main cavity escapes to the auxiliary cavity through the bypass holes, and the starting load of the power device can be reduced; therefore, the power device and the air compressor can be normally started in a low-temperature environment; after the starting is normal, the power device controls the valve body to block the bypass holes, and normal work of the air compressor is guaranteed.
Description
Technical field
The utility model relates to helical-lobe compressor, relates in particular to a kind of Low loading start up screw-rod air compressor.
Background technique
The advantages such as that screw-rod air compressor has is high-effect, high efficiency, non-maintaining and high-reliability, it can provide the pressurized air of high-quality to all trades and professions.When screw-rod air compressor work, twin-screw is in the process of rotating relative to engagement, and between cog volume is between the two ascending, again from large to small, thereby make air compressor first by the continuous air amount of suction port, the air that or else disconnected compression is sucked by suction port, is finally all discharged by relief opening.
Usually, be provided with a screw valve that is used for regulating air compressor volume flow on screw-rod air compressor, the inwall of air compressor is provided with some by-pass ports for discharged air, and screw valve can play the effect of the each by-pass port of shutoff.After air compressor work, can open by-pass port and change by this screw valve of self-regulation the adjusting of air displacement.In air compressor application, it is driven by diesel engine etc. conventionally, but in some low temperature environments, the startup of diesel engine self is more difficult, and owing to being sealed type in air compressor, its startup duty ratio that diesel engine is produced is larger, thereby causes compressor start more difficult, needs repeatable operation and wait, current topmost solution is to improve the low-temperature startup performance of diesel engine, increase auxiliary actuating apparatus, improve diesel engine oil-way temperature or add cold starting liquid etc., cumbersome.
Model utility content
The purpose of this utility model is to provide a kind of Low loading start up screw air compressor, is intended to the problem for solving existing air compressor low temperature environment difficulty in starting.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of Low loading start up screw air compressor is provided, comprise thering is the frame of main cavity and being built in described main cavity and order about rotation and intermeshing two screw rods by the power plant of a peripheral hardware, on the inwall of described main cavity, offer some by-pass holes, described frame is provided with for suction port air-breathing in described main cavity and for discharging the relief opening of the air after screw compression described in two, each described by-pass hole is between described suction port and described relief opening, on described frame, be also provided with the secondary cavity being communicated with each described by-pass hole, before described power plant start, described secondary cavity is communicated with by each described by-pass hole with described main cavity, in described secondary cavity, be provided with the valve body that can be used for the each described by-pass hole of shutoff, described frame is provided with after described power plant start for ordering about the each described by-pass hole of described valve body shutoff and being ordered about the driving mechanism of work by power plant.
Particularly, described valve body comprises and can and be ordered about the convolution panel rotating for the each described by-pass hole of shutoff by described driving mechanism with described secondary cavity inner wall laminating, described convolution panel has opening, before described power plant start, described opening is just to each described by-pass hole, and described secondary cavity is communicated with described main cavity.
Further, described valve body also comprises the running shaft that is ordered about rotation by described driving mechanism, and described running shaft is fixed in described secondary cavity by bearing, and described convolution panel and described running shaft are connected and fixed.
Particularly, described running shaft is provided with tooth road, and described driving mechanism comprises and stretches into the tooth bar engaging with described tooth road in described secondary cavity and order about by described power plant the driving member that work is moved described tooth bar along its length.
Further, in described secondary cavity, be also provided with for compressing described tooth bar back so that the bounding means that described tooth bar engages with described tooth road.
Particularly, the described driving member described power plant of serving as reasons order about the cylinder of work.
Particularly, each described by-pass hole is along the length direction linear array successively of described screw rod, and the opening edge of described convolution panel is along the round and smooth curve for can make the part or all of shutoff of each described by-pass hole in the time that described convolution panel rotates.
Further, described secondary cavity is communicated with by a guide pipeline with described suction port.
Particularly, described main cavity comprises the two crossing cylindrical cavities that be arranged in parallel, described in two screw rod lay respectively at two described in cylindrical cavity, each described by-pass hole is distributed in the wherein both sides of an intersection line of cylindrical cavity described in two, and described secondary cavity is all communicated with the each described by-pass hole of these intersection line both sides.
The utlity model has following technique effect:
In the utility model, main cavity is built-in with intermeshing screw rod, and the power plant by a peripheral hardware order about bolt rotary, general power plant are diesel engine, between secondary cavity and main cavity, be communicated with by some by-pass holes, in secondary cavity, be provided with valve body, this valve body can the each by-pass hole of shutoff under the ordering about of driving mechanism, and driving mechanism is worked by power plant control.In the time starting power plant, air compressor is the load of these power plant, power plant need to drive two screw rod rotations, force air compressor by suction port air amount simultaneously, the air sucking compresses in main cavity, main cavity internal pressure increases, and then the startup that has strengthened power plant is loaded, in air compressor of the present utility model, because by-pass hole is opened, the air of part can be escaped to secondary cavity by by-pass hole, effective reduction length of air compressor inner screw is reduced, thereby alleviate the air pressure in main cavity, reduce the startup load of power plant, even in the time that ambient temperature is lower, can ensure that power plant order about air compressor and normally start, and after power plant have started, power plant are controlled again driving mechanism and are ordered about the each by-pass hole of valve body shutoff, make the interior space of main cavity airtight, ensure the air pressure that follow-up air compressor is discharged by relief opening.
Brief description of the drawings
Fig. 1 is that the utility model embodiment's air compressor is without the structural representation of screw rod;
Fig. 2 is the sectional drawing of the air compressor of Fig. 1;
Fig. 3 is the structural representation of the secondary cavity of the air compressor of Fig. 1.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Referring to Fig. 1-Fig. 3, the utility model embodiment provides a kind of Low loading start up screw-rod air compressor, comprise frame 1 and intermeshing two screw rods 2, frame 1 has main cavity 11, two screw rods 2 are all positioned at main cavity 11, and it rotates under the power plant (not shown) effect of a peripheral hardware, usually power plant are diesel engine, the actuation gear of diesel engine engages with the live axle that a screw rod 2 wherein stretches out main cavity 11, on the inwall of main cavity 11, offer some by-pass holes 12, on frame 1, be also provided with suction port 13 and relief opening 14, suction port 13 is all communicated with main cavity 11 with relief opening 14, in the time that two screw rods 2 rotate, ambient air can be sucked in main cavity 11 by suction port 13, and in the interior compression of main cavity 11, finally by relief opening 14 by the Bas Discharged main cavity 11 after compression, each by-pass hole 12 is located between suction port 13 and relief opening 14, usually, suction port 13 and relief opening 14 are located at respectively two ends of main cavity 11, each by-pass hole 12 is between the two, and distribute successively along two screw rod 2 length directions, on frame 1, be also provided with a secondary cavity 15, between secondary cavity 15 and main cavity 11, be communicated with by each by-pass hole 12, in secondary cavity 15, be provided with valve body 3, it can be used for the each by-pass hole 12 of shutoff, one driving mechanism 4 is set simultaneously on frame 1, this driving mechanism 4 can order about the each by-pass hole 12 of valve body 3 shutoff under the effect of power plant.In the time starting power plant, the starting load that air compressor is power plant, power plant need to drive two screw rods 2 to rotate, main cavity 11 absorbs extraneous air simultaneously, and to this part air compressing, increase main cavity 11 internal air pressures, thereby increase the starting load of power plant.In the present embodiment, between main cavity 11 and secondary cavity 15, be communicated with by some by-pass holes 12, when gas is near moving to by-pass hole 12 like this, portion gas can be through by-pass hole 12 ease to secondary cavity 15, only have in the time that the Line of contact between two screw rods 2 moves to the end of by-pass hole 12 of close relief opening 14, remaining gas is just closed completely, the gas compression processes of air compressor from this point just really, make effective reduction length of two screw rods 2 because opening of by-pass hole 12 greatly reduces to this, volume flow in air compressor also reduces thereupon, again because the air horsepower of air compressor is directly proportional to volume flow, thereby the air horsepower of air compressor is reduced greatly, and then the starting load of power plant is unlikely to excessive, even in the time that ambient temperature is lower, can ensure that power plant normally start, and after power plant and air compressor all normally start, power plant start to control driving mechanism 4 and work, driving mechanism 4 orders about the each by-pass hole 12 of valve body 3 shutoff, ensure the interior gas pressure intensity of main cavity 11, pneumatics function is normally worked, under normal circumstances, in the time that power plant start, the in the situation that in air compressor, each by-pass hole 12 being opened, the air horsepower of air compressor can reduce by 26.3%.Usually, secondary cavity 15 is not a confined space, and it is also provided with gas outlet, and the gas being escaped in it by main cavity 11 can flow out via the gas outlet of secondary cavity 15, to avoid the gas pressure intensity in secondary cavity 15 excessive.
For valve body 3, it comprises a convolution panel 31, this convolution panel 31 is fitted with the inwall 151 of secondary cavity 15, and under the effect of driving mechanism 3, convolution panel 31 can be rotated the shutoff that can form each by-pass hole 12 in secondary cavity 15, convolution panel 31 is also offered opening 311, before power plant start, this opening 311 is just to each by-pass hole 12, and main cavity 11 is communicated with secondary cavity 15.In this structure, the pressurized gas of main cavity 11 interior generations can by by-pass hole 12, through convolution, the opening 311 on panel 31 enters in secondary cavity 15 again, and under 4 effects of power plant control driving mechanism, convolution panel 31 rotates, its opening 311 positions are departed from, and then the panel 31 that can make to circle round does not have the opening can the each by-pass hole 12 of shutoff.Usually, secondary cavity 15 is cylinder type cavity, convolution panel 31 is also cylindroid, can make like this to circle round panel 31 in the interior convenient rotation of secondary cavity 15, circle round it is more complete between panel 31 and the inwall 151 of secondary cavity 15, also can to fit simultaneously, to ensure that when the valve body 3 shutoff by-pass hole 12, each by-pass hole 12 is all closed completely, main cavity 11 can not produce the situation of Leakage Gas.Certainly valve body 3 can also adopt a push rod to promote it along the moving radially of secondary cavity 15, and then the shutoff to each by-pass hole 12 are realized with inwall 151 laminatings of secondary cavity 15 in valve body 3 one surfaces.
Optimize above-described embodiment, valve body 3 is also provided with a running shaft 32, two ends of running shaft 32 wear respectively two bearings 33 and make on its inwall 151 that is fixed on secondary cavity 15, between running shaft 32 and convolution panel 31, be fixedly connected with, two ends of convolution panel 31 arrange respectively end plates 34, running shaft 32 wears biend plate 34 successively, thereby realize being fixedly connected with between convolution panel 31 and running shaft 32, certainly between this three, also can adopt integral forming process to complete, driving mechanism 4 rotates for ordering about running shaft 32, thereby drive convolution panel 31 to rotate around running shaft 32.Between the internal surface of the outer surface of running shaft 32 and convolution panel 31, there is certain gap, running shaft 32, end plates 34 and convolution panel 31 threes enclose and form certain holding space, this space is communicated with secondary cavity 15, the opening 311 of pressurized gas on by-pass hole 12 and convolution panel 31 enters this space, then entered in secondary cavity 15 by this space.In these valve body 3 structures, driving mechanism 4 acts on running shaft 32 and rotates more conveniently, and implementation structure is simpler.In the endface position of running shaft 32, also should be provided with an indicator hole 321, this indicator hole 321 is positioned at the eccentric position of running shaft 32 end faces, and it is corresponding with opening 311 positions of convolution panel 31, in the time that valve body 3 is installed, can determine opening 311 present positions of convolution panel 31 by the direction indication of this indicator hole 321, so that in the time that valve body 3 is installed, the opening 311 of convolution panel 31 is corresponding with the position of by-pass hole 12, can improve the installation efficiency of valve body 3.
Specifically referring to Fig. 2 and Fig. 3, on running shaft 32, be equipped with Yi Chi road 322, accordingly, 4 of driving mechanisms comprise and stretch into the tooth bar 41 that secondary cavity 15 Nei Yugaichi roads 322 engage, be provided with driving member 42 in one end of tooth bar 41, this driving member 42 can make tooth bar 41 move along its length under the control action of power plant, and then can drive running shaft 32 to rotate.Generally be located between bearing 33 and end plates 34 in the position in running shaft 32Zhong Chi road 322, be that the tooth bar 41 of driving mechanism 4 is also by stretching between bearing 33 and end plates 34 in secondary cavity 15, move and order about in the process that running shaft 32 rotates at it like this, tooth bar 41 can not cause interference to the rotation of convolution panel 31.In frame 1, be also provided with a conduit (not shown), this conduit is communicated to secondary cavity 15, tooth bar 41 one end are connected with driving member 42, the other end stretches in this conduit, certainly tooth bar 41Yu Chi road 322 also keeps engagement, in the process moving at tooth bar 41, the part-structure of tooth bar 41 slides in this conduit, this is that end for making tooth bar 41 all has certain support, ensure that tooth bar 41 there will not be and teetertotters in the mobile process of engagement, engages more stable between tooth bar 41Yu Chi road 322.Usually, driving member 42 can be a cylinder, and this cylinder is flexible under the control action of power plant, and then realizes the movement of tooth bar 41, certainly driving member also can, for the push rod moving along certain track under power plant effect, be realized the movement of tooth bar 41 by the movement of push rod.
Continue to optimize above-described embodiment, a bounding means 152 is also set in secondary cavity 15, these bounding means 152 one end are fixed on the inwall 151 of secondary cavity 15, and the other end is for compressing the back of tooth bar 41.By the effect of keeping out of bounding means 152, there is excessive skew in restriction tooth bar 41 in the mobile process of engagement in vertical its direction moving, and avoids the engagement between tooth bar 41Yu Chi road 322 to occur departing from.Usually, bounding means 152 can be adopted to bolt or elastic component etc., in the time using bolt, between bolt and tooth bar, can there is less gap, there is certain scope of rocking in tooth bar 41, in the time that bounding means 152 adopts elastic component, elastic component can be in compressive state, in the process moving at tooth bar 41 like this, bounding means 152 can impose certain effect of supporting to tooth bar 41, make tooth bar 41 can in vertical its direction moving, not occur excessive skew, further ensure the stability of engagement between tooth bar 41Yu Chi road 322, simultaneously also because the elastic reaction of bounding means 152, its active force to tooth bar 41 is unlikely to excessive, can too much not affect tooth bar 41 movement along its length.
Further, it is a straight line that each by-pass hole 12 is arranged in order along the length direction of screw rod 2, this is made as to smooth curve by opening 311 edges of offering on convolution panel 31, this smooth curve extends along one end to the direction revolution of the other end of convolution panel 31, be that opening 311 edges are not straight line, like this in the time rotating back to radial facing plate 31, opening 311 departs from the by-pass hole corresponding with it 12 positions gradually, because the edge of opening 311 is round and smooth curve, can there is not shutoff closure in each by-pass hole 12 simultaneously, can pass through the movement of adjusting gear rack 41 to this, can rotate back to radial facing plate 31 makes the by-pass hole 12 of part in sealed condition, the by-pass hole 12 of a part is in open mode.Due in the normal work of air compressor, usually need the by-pass hole of sealed condition 12 to open the adjusting that realizes volume flow, this opening 311 structures of the panel 31 that circles round in this valve body 3 can make main cavity 11 internal volume flows have more controllability.Opening 311 structures of certain this curved, in the time rotating back to radial facing plate 31, can realize the whole shutoff to each by-pass hole 12 or all open.
Refer again to Fig. 2, continue to optimize above-described embodiment, a guide pipeline 16 is also set on frame 1, guide pipeline 16 is communicated with secondary cavity 15 and suction port 13.In the time starting power plant, the air being sucked by suction port 13 has part and will be escaped to secondary cavity 15 by by-pass hole 12, then this portion gas again through this guide pipeline 16 to suction port 13, again enter in main cavity 11, between main cavity 11 and secondary cavity 15, form gas circulation, so not only can avoid the interior gas expansion that occurs of secondary cavity 15, can also prevent that ease to the gas in secondary cavity 15 with certain pressure intensity from directly being overflowed and causing security incident by air compressor.
Refer again to Fig. 1, for the structure of main cavity 11, it comprises two cylindrical cavities 11, this two cylindrical cavity 111 be arranged in parallel and intersects, and there are two parallel intersection linees 112, by each by-pass hole 12 both sides of an intersection line 112 located therein respectively, on the inwall of each cylindrical cavity 11, all offer by-pass hole 12, certainly it is a straight line that the by-pass hole 12 that is divided into both sides is also arranged in order, secondary cavity 15 is opened in to the just position to this intersection line 112, the each by-pass hole 12 that is simultaneously positioned at these intersection line 112 both sides is all communicated with secondary cavity 15, this structure, can make between main cavity 11 and secondary cavity 15 be communicated with comparatively simple, convenient processing.
The foregoing is only the utility model preferred embodiment; its structure is not limited to the above-mentioned shape of enumerating; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. a Low loading start up screw air compressor, comprise thering is the frame of main cavity and being built in described main cavity and order about rotation and intermeshing two screw rods by the power plant of a peripheral hardware, on the inwall of described main cavity, offer some by-pass holes, described frame is provided with for suction port air-breathing in described main cavity and for discharging the relief opening of the air after screw compression described in two, each described by-pass hole is between described suction port and described relief opening, it is characterized in that: on described frame, be also provided with the secondary cavity being communicated with each described by-pass hole, before described power plant start, described secondary cavity is communicated with by each described by-pass hole with described main cavity, in described secondary cavity, be provided with the valve body that can be used for the each described by-pass hole of shutoff, described frame is provided with after described power plant start for ordering about the each described by-pass hole of described valve body shutoff and being ordered about the driving mechanism of work by power plant.
2. Low loading start up screw air compressor as claimed in claim 1, it is characterized in that: described valve body comprises and can and be ordered about the convolution panel rotating for the each described by-pass hole of shutoff by described driving mechanism with described secondary cavity inner wall laminating, described convolution panel has opening, before described power plant start, described opening is just to each described by-pass hole, and described secondary cavity is communicated with described main cavity.
3. Low loading start up screw air compressor as claimed in claim 2, it is characterized in that: described valve body also comprises the running shaft that is ordered about rotation by described driving mechanism, described running shaft is fixed in described secondary cavity by bearing, and described convolution panel and described running shaft are connected and fixed.
4. Low loading start up screw air compressor as claimed in claim 3, it is characterized in that: described running shaft is provided with tooth road, described driving mechanism comprises and stretches into the tooth bar engaging with described tooth road in described secondary cavity and order about by described power plant the driving member that work is moved described tooth bar along its length.
5. Low loading start up screw air compressor as claimed in claim 4, is characterized in that: in described secondary cavity, be also provided with for compressing described tooth bar back so that the bounding means that described tooth bar engages with described tooth road.
6. Low loading start up screw air compressor as claimed in claim 4, is characterized in that: the described driving member described power plant of serving as reasons order about the cylinder of work.
7. Low loading start up screw air compressor as claimed in claim 2, it is characterized in that: each described by-pass hole is along the length direction linear array successively of described screw rod, and the opening edge of described convolution panel is along the round and smooth curve for can make the part or all of shutoff of each described by-pass hole in the time that described convolution panel rotates.
8. the Low loading start up screw air compressor as described in claim 1-7 any one, is characterized in that: described secondary cavity is communicated with by a guide pipeline with described suction port.
9. the Low loading start up screw air compressor as described in claim 1-7 any one, it is characterized in that: described main cavity comprises the two crossing cylindrical cavities that be arranged in parallel, described in two screw rod lay respectively at two described in cylindrical cavity, each described by-pass hole is distributed in the wherein both sides of an intersection line of cylindrical cavity described in two, and described secondary cavity is all communicated with the each described by-pass hole of these intersection line both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420037470.0U CN203783894U (en) | 2014-01-21 | 2014-01-21 | Low-load starting screw type air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420037470.0U CN203783894U (en) | 2014-01-21 | 2014-01-21 | Low-load starting screw type air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783894U true CN203783894U (en) | 2014-08-20 |
Family
ID=51320087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420037470.0U Withdrawn - After Issue CN203783894U (en) | 2014-01-21 | 2014-01-21 | Low-load starting screw type air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790824A (en) * | 2014-01-21 | 2014-05-14 | 深圳寿力亚洲实业有限公司 | Low load starting screw air compressor |
-
2014
- 2014-01-21 CN CN201420037470.0U patent/CN203783894U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790824A (en) * | 2014-01-21 | 2014-05-14 | 深圳寿力亚洲实业有限公司 | Low load starting screw air compressor |
| CN103790824B (en) * | 2014-01-21 | 2016-08-17 | 深圳寿力亚洲实业有限公司 | Low loading start up screw-rod air compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20160817 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20160817 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |