CN207609560U - Balanced type Roots vacuum pumping system - Google Patents
Balanced type Roots vacuum pumping system Download PDFInfo
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- CN207609560U CN207609560U CN201721444168.7U CN201721444168U CN207609560U CN 207609560 U CN207609560 U CN 207609560U CN 201721444168 U CN201721444168 U CN 201721444168U CN 207609560 U CN207609560 U CN 207609560U
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Abstract
The utility model is related to Roots vacuum pump technical field, especially a kind of balanced type Roots vacuum pumping system；Including Roots vaccum pump, condenser, testing agency and DCS system；The both sides of the pump housing of Roots vaccum pump are respectively arranged with refluxing opening, and automatic regulating valve is equipped on refluxing opening；Condenser is arranged on the gas outlet of Roots vaccum pump, passes through piping connection between condenser and refluxing opening；Pressure sensor a and pressure sensor b are separately positioned on the air inlet pipeline and discharge line of Roots vaccum pump, and temperature sensor is arranged on the discharge line of Roots vaccum pump；The utility model can be used as common Roots vaccum pump and air cooling lobe pump use simultaneously, versatile, the scope of application is extremely wide；The advantages of having taken into account two kinds of lobe pumps simultaneously, atm number can be provided in the case where needing atm number, big pressure difference can also be provided when needing big pressure difference.
Description
Technical field
The utility model is related to Roots vacuum pump technical field, especially a kind of balanced type Roots vacuum pumping system.
Background technology
Roots vaccum pump can divide three categories by its purposes, one is common Roots vaccum pump, is applied at present widely
The fields such as vacuum metling, vacuum coating, vacuum impregnation, medication chemistry, the simulation of space flight sky；The second is air-cooled Roots vacuum pump,
Using the directly cooling rotor of cooling gas or air, the heat resistance of Roots vaccum pump is improved, therefore suitable for high temperature, height
The operating mode that the common Roots vaccum pump such as compression ratio and High Pressure Difference cannot be born, such as some electric power and petrochemical industry field；Third, wet
Formula (water cooling) Roots vaccum pump, such vacuum pump are injected directly into small amount of water from air entry and carry out cooling gas, structure and conventional sieve
For thatch vacuum pump compared to more complicated, operation noise is big, is mainly used for papermaking and industrial dedusting industry, scope of application relative narrower.Mesh
The producer of preceding domestic and international production Roots vaccum pump is very more, is all mainly the common Roots vaccum pump of production and ventilation type Roots vacuum
Pump, and it is most with the producer for producing common Roots vaccum pump.
Common Roots vaccum pump is a kind of two-spool positive-displacement vacuum pump, two rotors high speed rotation in the opposite direction, two
The space that person is combined into the pump housing constantly changes and sucks and be discharged gas, between being between rotor and rotor, rotor and the pump housing
Gap coordinates.The heat that Roots vaccum pump generates during compressed action can pass on rotor and the pump housing, and the heat of rotor is difficult
To pass to outside, and the heat of the pump housing is easy to be dispersed into air, and causing occurs the temperature difference coefficient of thermal expansion can be caused to differ in the two
Fit clearance reduces even stuck.Therefore, the live load of common Roots vaccum pump and pressure difference are all limited to, and to processing
The thermal stability of precision, assembly precision and material has higher requirement, at present the Roots vaccum pump of domestic production and the world
The vacuum pump difference of first-class producer's production is also mainly in terms of reliability.Air-cooled Roots vacuum pump is used, although energy
The heat resistance of Roots vaccum pump is improved, but the reflux of gas can reduce the pumping efficiency of lobe pump, and to realize rotor
To the sealing of refluxing opening when pumping, the increasing of inevitable requirement rotor volume causes effective pump down volume to decline, therefore ventilation type Roots
Vacuum pump it is relatively inefficient.Since the different from those of two kinds of lobe pumps is larger, the two cannot be substantially used interchangeably, general
Property is poor.
Invention content
The purpose of this utility model is to provide a kind of balanced type Roots vacuum pumping systems, can be wanted according to actual operating mode
It asks, the aperture of the cooling gas piping of automatic adjustment reflux realizes that Roots vaccum pump can be used as common Roots vaccum pump gentle simultaneously
Cold lobe pump uses, the advantages of having both two kinds of lobe pumps, under the premise of ensuring Roots vaccum pump reliable operation, improves sieve as possible
The performance of thatch vacuum pump.
To reach above-mentioned function, technical solution provided by the utility model is：
A kind of balanced type Roots vacuum pumping system, including Roots vaccum pump, condenser, testing agency and DCS system；
The both sides of the pump housing of the Roots vaccum pump are respectively arranged with refluxing opening, and automatic adjustment is equipped on the refluxing opening
Valve；
The condenser is arranged on the gas outlet of the Roots vaccum pump, leads between the condenser and the refluxing opening
Cross piping connection；
The testing agency includes pressure sensor a, pressure sensor b and temperature sensor, the pressure sensor a and
The pressure sensor b is separately positioned on the air inlet pipeline and discharge line of the Roots vaccum pump, the temperature sensor
It is arranged on the discharge line of the Roots vaccum pump；
DCS system includes input module, output module, memory module and processor；The input module and the pressure
The sensor a and pressure sensor b and temperature sensor electrical connection；The input module is passed for receiving the pressure
The inlet pressure P of the Roots vaccum pump of sensor a and pressure sensor b detectionsIWith outlet pressure P0, the temperature sensor
The outlet exhaust temperatures T of the Roots vaccum pump of detectionO, and PI、P0And T0Send processor to；
The memory module is electrically connected with the processor, for storing pre-set Pmin、Pmax、n、TmaxWith permit
Perhaps the initial value of abnormal condition duration t and various work condition state (PminIt is that Roots vacuum pump intake absolute pressure permits
Perhaps minimum value, PmaxIt is the maximum value that Roots vacuum pump intake absolute pressure allows, n is selected when being Roots vaccum pump design selection
Compression ratio, TmaxIt is the maximum value that Roots vaccum pump outlet exhaust temperatures allow)；
The processor is the P receivedI、P0And T0It is compared with the preset value in the memory, selection is corresponding
Operating mode, and generate control signal；
The output module is electrically connected with processor and the automatic regulating valve, and the output module is according to control signal tune
Save the aperture of the automatic regulating valve.
The utility model additionally provides the control method of above-mentioned balanced type Roots vacuum pumping system, includes the following steps,
S1, DCS system read PI、P0And T0Numerical value；
S2, DCS system are compared according to the numerical value received with the numerical value set, determine balanced type Roots vaccum pump system
Which kind of work condition state system is in；
S3, DCS system send a signal to automatic regulating valve according to work condition state number, and automatic regulating valve executes corresponding dynamic
Make；
If the duration that S4, balanced type Roots vaccum pump systems stay are in abnormal condition is more than setting value t, DCS
System signal an alert, and show abnormal condition explanation.
Preferably, it is slowly changed by per second 1% aperture when automatic regulating valve changes aperture.
Preferably, the action relationships that the work condition state and automatic regulating valve execute are as follows：
1. working as PI＞ Pmax、Po≤n×Pmax、To≤TmaxWhen, automatic regulating valve is fully closed；
2. working as Pmin≤PI≤Pmax、Po≤n×Pmax、To≤TmaxWhen, automatic regulating valve is motionless；
3. working as PI＜ Pmin、Po≤n×Pmax、To≤TmaxWhen, automatic adjustment valve opening increases；
4. working as PI＞ Pmax、Po＞ n × Pmax、To≤TmaxWhen, automatic adjustment valve opening reduces；
5. working as Pmin≤PI≤Pmax、Po＞ n × Pmax、To≤TmaxWhen, automatic adjustment valve opening increases；
6. working as PI＜ Pmin、Po＞ n × Pmax、To≤TmaxWhen, automatic adjustment valve opening increases；
7. working as PI＞ Pmax、Po≤n×Pmax、To＞ TmaxWhen, automatic adjustment valve opening increases；
8. working as Pmin≤PI≤Pmax、Po≤n×Pmax、To＞ TmaxWhen, automatic adjustment valve opening increases；
9. working as PI＜ Pmin、Po≤×Pmax、To＞ TmaxWhen, automatic adjustment valve opening increases；
10. working as PI＞ Pmax、Po＞ n × Pmax、To＞ TmaxWhen, automatic adjustment valve opening increases；
11. working as Pmin≤PI≤Pmax、Po＞ n × Pmax、To＞ TmaxWhen, automatic adjustment valve opening increases；
12. working as PI＜ Pmin、Po＞ n × Pmax、To＞ TmaxWhen, automatic adjustment valve opening increases.
The beneficial effects of the utility model are：
1, balanced type Roots vacuum pumping system can be used as common Roots vaccum pump and air cooling lobe pump to use simultaneously, versatility
By force, the scope of application is extremely wide；
2, the advantages of having taken into account two kinds of lobe pumps can realize that advantage is maximum according to the different Operating condition adjustments performance of itself
Change, atm number can be provided in the case where needing atm number, big pressure difference can also be provided when needing big pressure difference；
3, system has self-diagnosing function, can determine whether Roots vacuum pump work is normal according to the parameter of operation, together
When can self adjustment avoid lobe pump from the case where excess load occur, greatly improve the reliability of lobe pump, be also convenient for using
And maintenance.
Description of the drawings
Fig. 1 is the structural schematic diagram of embodiment one.
Specific implementation mode
1 pair of the utility model is further elaborated below in conjunction with the accompanying drawings：
Embodiment one：
A kind of balanced type Roots vacuum pumping system as shown in Figure 1, including Roots vaccum pump 1, condenser 7, testing agency
With DCS system 4；The both sides of the pump housing of Roots vaccum pump 1 are respectively arranged with refluxing opening 11, and automatic adjustment is equipped on refluxing opening 11
Valve 3；Condenser 7 is arranged on the gas outlet of Roots vaccum pump 1, is connected by pipeline 6 between condenser 7 and refluxing opening 11；Inspection
It includes pressure sensor a2, pressure sensor b8 and temperature sensor 5 to survey mechanism, and pressure sensor a2 and pressure sensor b8 divide
It is not arranged on the air inlet pipeline and discharge line of Roots vaccum pump 1, the discharge in Roots vaccum pump 1 is arranged in temperature sensor 5
On pipeline.
DCS system 4 includes input module, output module, memory module and processor；Input module and pressure sensor a2
It is electrically connected with pressure sensor b8 and temperature sensor 5；Input module is for receiving pressure sensor a2 and pressure sensor b8
The inlet pressure P of the Roots vaccum pump 1 of detectionIWith outlet pressure P0, the outlet row for the Roots vaccum pump 1 that temperature sensor 5 detects
Temperature degree T0, and PI、P0And T0Send processor to；Memory module is electrically connected with processor, pre-set for storing
Pmin、Pmax、n、TmaxWith the initial value and various work condition states, explanation and automatic tune for allowing abnormal condition duration t
Save the action to be executed of valve 3.Processor is the P receivedI、P0And T0It is compared with the preset value in memory, selection is corresponding
Operating mode, and generate control signal；Output module is electrically connected with processor and the automatic regulating valve 3, and output module is according to control
Signal control automatic regulating valve 3 processed is turned on and off.
Above-mentioned PminIt is the minimum value that 1 entrance absolute pressure of Roots vaccum pump allows, PmaxIt is that 1 entrance of Roots vaccum pump is absolute
The maximum value that pressure allows, the compression ratio that n is selected when being 1 design selection of Roots vaccum pump, TmaxIt is the outlet of Roots vaccum pump 1 row
The maximum value that temperature degree allows.
The utility model additionally provides the control method of above-mentioned balanced type Roots vacuum pumping system.It is balanced type Roots below
The action relationships that work condition state number, work condition state, explanation and the automatic regulating valve of vacuum pump system execute：
It is the control method of balanced type Roots vacuum pumping system below, steps are as follows：
S1, DCS system 4 read PI、P0And T0Numerical value；
S2, DCS system 4 are compared according to the numerical value received with the numerical value set, determine balanced type Roots vaccum pump
Which kind of work condition state is system be in；
S3, DCS system 4 send a signal to automatic regulating valve 3 according to work condition state number, and automatic regulating valve 3 executes accordingly
Action；
If S4, balanced type Roots vaccum pump systems stay are in the duration of abnormal condition (i.e. status number is not 2)
More than setting value t, then 4 signal an alert of DCS system, and show abnormal condition explanation.
To avoid fluctuation too big when being adjusted for automatic regulating valve 3, when automatic regulating valve 3 changes aperture by per second 0.5%~
2% aperture slowly changes, and in the present embodiment, automatic regulating valve 3 is slowly changed by per second 1% aperture.
Embodiment two：
In the present embodiment, the meter suction pressure allowable range that vacuum system needs is 40~60mbar (A), Roots vacuum
It is 3 to pump 1 type selecting compression ratio, and limit delivery temperature is 100 DEG C, and setting allows abnormal condition duration t=10 minutes, i.e.,
Pmin=40mbar, Pmax=60mbar, n=3, Tmax=100 DEG C.
Above-mentioned predetermined value is inputted in DCS system 4 first, this system is controlled by following steps.
The inlet pressure P of S1, pressure sensor and temperature sensor 5 Roots vaccum pump 1I, outlet pressure P0It is arranged with outlet
Temperature degree ToIt is transferred in DCS system 4；
S2, DCS system 4 are compared according to the data received with the numerical value set, determine balanced type Roots vaccum pump
Which kind of state is system be in, for example when rigid startup Roots vaccum pump 1, system mode is in number (1)；
S3, DCS system 4 send a signal to automatic regulating valve 3, automatic regulating valve 3 according to the corresponding action of status number (1)
Fully closed, the tolerance of Roots vaccum pump 1 is maximum at this time, can be rapidly achieved the pressure value of system requirements；
If the state of system changes, for example becomes status number (3), DCS system 4 is further according to status number (3)
Corresponding action sends a signal to automatic regulating valve 3, and automatic regulating valve 3 slowly increases aperture, and the condensed device 7 of gas of discharge is cold
But it after, is flowed back by pipeline 6 in the pump chamber of Roots vaccum pump 1, plays the role of cooling rotor and balance pressure, until system
Become the aperture that status number (2) just stops increasing automatic regulating valve 3；
If S4, balanced type Roots vaccum pump systems stay are in abnormal condition (i.e. status number is not (2)) duration
More than setting value t=10 minutes, it cannot still restore normal condition after automatic adjustment, then 4 signal an alert of DCS system, and
It shows abnormal condition explanation, asks operating personnel note that needing shutdown inspection equipment when necessary.
The balanced type Roots vacuum pumping system of the application and existing common Roots vaccum pump and air-cooled roots vacuum pump
Performance is compared as follows：
The advantages of common Roots vaccum pump is identical due to not having reflux gas in suction tolerance, therefore consume
Power ratio air-cooled roots vacuum pump is much smaller；The disadvantage is that compression ratio can generate heat when becoming larger it is stuck.
The advantages of air-cooled roots vacuum pump is that have reflux gas to cool down rotor, be not easy when compression ratio is big it is stuck, therefore can be with
Operating mode for larger compression ratio；The disadvantage is that the reflux gas always existed can cause power attenuation to increase, mechanical efficiency is relatively low.
Conventional air-cooled roots vacuum pump can also be used as common Roots vaccum pump use in fact, only identical operating mode
Under, the power for the lobe pump that is gas-cooled will significantly increase, therefore generally can not replace use.And common Roots vaccum pump is because cannot be used for
Big compression ratio, therefore can not be used to replace air-cooled roots vacuum pump.
And if balance and be equivalent to a common Roots vaccum pump when shape Roots vaccum pump shuts control valve, if adjust
The air-cooled roots vacuum pump of a routine is equivalent to when saving valve wide open.So it can both be used as common Roots vaccum pump
It can be used again as air-cooled roots vacuum pump.And its more situation is neither to shut valve, also not standard-sized sheet valve, is used in one
The state of a centre, and can be according to the aperture of the variation automatic adjustment valve of operating mode, to realize the adjusting of self performance.
Therefore, balanced type Roots vacuum pumping system can be used as common Roots vaccum pump and air cooling lobe pump to use simultaneously, versatile, suitable
It is extremely wide with range；The application has taken into account the advantages of common and two kinds of lobe pumps of air cooling simultaneously, can be according to different Operating condition adjustments certainly
The performance of body realizes maximum advantage, atm number can be provided in the case where needing atm number, can also when needing big pressure difference
Big pressure difference is provided.
Detection data shows, the air cooling sieve of the balanced type Roots vacuum pumping system of the utility model compared with conventional same size
The maximum tolerance of thatch pump can promote 20%, and maximum compression ratio is 17 times of the common Roots vaccum pump of same size.
Claims (1)
1. a kind of balanced type Roots vacuum pumping system, it is characterised in that：Including Roots vaccum pump, condenser, testing agency and DCS
System；
The both sides of the pump housing of the Roots vaccum pump are respectively arranged with refluxing opening, and automatic regulating valve is equipped on the refluxing opening；
The condenser is arranged on the gas outlet of the Roots vaccum pump, passes through pipe between the condenser and the refluxing opening
Road connects；
The testing agency includes pressure sensor a, pressure sensor b and temperature sensor, the pressure sensor a and described
Pressure sensor b is separately positioned on the air inlet pipeline and discharge line of the Roots vaccum pump, the temperature sensor setting
On the discharge line of the Roots vaccum pump；
DCS system includes input module, output module, memory module and processor；The input module and the pressure sensing
The device a and pressure sensor b and temperature sensor electrical connection；The input module is for receiving the pressure sensor
The inlet pressure P of the Roots vaccum pump of a and pressure sensor b detectionsIWith outlet pressure PO, the temperature sensor detection
Roots vaccum pump outlet exhaust temperatures TO, and PI、POAnd TOSend processor to；
The memory module is electrically connected with the processor, for storing pre-set Pmin、Pmax、n、TmaxIt is non-with permission
The initial value of normal condition duration t and various work condition states, PminIt is Roots vacuum pump intake absolute pressure to allow
Minimum value, PmaxIt is the maximum value that Roots vacuum pump intake absolute pressure allows, n is selected when being Roots vaccum pump design selection
Compression ratio, TmaxIt is the maximum value that Roots vaccum pump outlet exhaust temperatures allow；
The processor is the P receivedI、POAnd TOIt is compared with the preset value in the memory, selects corresponding work
Condition, and generate control signal；
The output module is electrically connected with processor and the automatic regulating valve, and the output module is according to control Signal Regulation institute
State the aperture of automatic regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721444168.7U CN207609560U (en) | 2017-11-01 | 2017-11-01 | Balanced type Roots vacuum pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721444168.7U CN207609560U (en) | 2017-11-01 | 2017-11-01 | Balanced type Roots vacuum pumping system |
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| CN207609560U true CN207609560U (en) | 2018-07-13 |
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|---|---|---|---|
| CN201721444168.7U Active CN207609560U (en) | 2017-11-01 | 2017-11-01 | Balanced type Roots vacuum pumping system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559200A (en) * | 2017-11-01 | 2018-01-09 | 广东肯富来泵业股份有限公司 | Balanced type Roots vacuum pumping system and its control method |
| CN114810591A (en) * | 2022-04-28 | 2022-07-29 | 烟台东德实业有限公司 | Low-temperature-rise low-noise hydrogen circulating pump |
-
2017
- 2017-11-01 CN CN201721444168.7U patent/CN207609560U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559200A (en) * | 2017-11-01 | 2018-01-09 | 广东肯富来泵业股份有限公司 | Balanced type Roots vacuum pumping system and its control method |
| CN114810591A (en) * | 2022-04-28 | 2022-07-29 | 烟台东德实业有限公司 | Low-temperature-rise low-noise hydrogen circulating pump |
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