CN109185143B - Control device for sealing gas of multi-shaft multi-stage gear assembled compressor - Google Patents
Control device for sealing gas of multi-shaft multi-stage gear assembled compressor Download PDFInfo
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- CN109185143B CN109185143B CN201811205108.9A CN201811205108A CN109185143B CN 109185143 B CN109185143 B CN 109185143B CN 201811205108 A CN201811205108 A CN 201811205108A CN 109185143 B CN109185143 B CN 109185143B
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- 238000007789 sealing Methods 0.000 title claims abstract description 61
- 230000001105 regulatory effect Effects 0.000 claims abstract description 83
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 230000001276 controlling effect Effects 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 57
- 239000012535 impurity Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
Abstract
The invention discloses a control device for sealing gas of a multi-shaft multi-stage gear assembled compressor, relates to the technical field of compressors, and mainly aims to enable the performance of a sealing element to be suitable for the working condition change of the compressor in time and avoid misoperation. The main technical scheme of the invention is as follows: the device comprises a first air source interface, a second air source interface, a first regulating valve, a detection unit and a control unit; the first air source interface and the second air source interface are respectively used for connecting corresponding air sources, and are communicated with the detection end of the detection unit after being connected in parallel; the detection end of the detection unit is communicated with the inlet end of the first regulating valve, the detection unit is used for detecting the pressure value in the control device, the first regulating valve is connected with the control unit, and the outlet end of the first regulating valve is used for being communicated with the sealing piece; the control unit is used for controlling the opening of the first regulating valve according to the pressure value fed back by the detection unit. The invention is mainly used for providing sealing gas for the compressor.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a control device for sealing gas of a multi-shaft multi-stage gear assembly type compressor.
Background
Centrifugal compressors are used to convey air, various process gases or mixed gases and to increase their pressure, and are widely used in air separation and other process flows.
The sealing is arranged between the rotor and the stator of the compressor, and in order to ensure the performance and the safety of the sealing, a controllable sealing gas supply needs to be provided for the sealing. At present, the shaft end of the compressor usually uses labyrinth seal to seal between the rotor and the stator, moreover, the gas generated by the compressor is communicated to the labyrinth seal through a pipeline, and meanwhile, a control valve is arranged on the pipeline.
However, the manual adjustment speed is slow, so that the performance of the sealing element cannot adapt to the working condition change of the compressor in time, and misoperation is easy to occur during manual adjustment, so that the compressor cannot work normally.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a control device for a sealing gas of a multi-shaft multi-stage gear assembly type compressor, which mainly aims to enable the performance of a sealing member to adapt to the working condition change of the compressor in time and avoid the occurrence of misoperation, so that the compressor can work normally.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
the embodiment of the invention provides a control device for seal gas of a multi-shaft multi-stage gear assembled compressor, which comprises:
the device comprises a first air source interface, a second air source interface, a first regulating valve, a detection unit and a control unit;
the first air source interface and the second air source interface are respectively used for connecting corresponding air sources, and are communicated with the detection end of the detection unit after being connected in parallel;
the detection end of the detection unit is communicated with the inlet end of the first regulating valve, the detection unit is used for detecting the pressure value in the control device, the first regulating valve is connected with the control unit, and the outlet end of the first regulating valve is used for being communicated with a sealing piece;
the control unit is used for receiving the pressure value fed back by the detection unit, controlling the opening of the first regulating valve to increase when the pressure value is larger than a preset pressure value, and controlling the opening of the first regulating valve to decrease when the pressure value is smaller than the preset pressure value.
Further, the control device for the sealing gas of the multi-shaft multi-stage gear assembly type compressor also comprises a second regulating valve;
the first air source interface is connected with the second regulating valve in series and then connected with the second air source interface in parallel;
the second regulating valve is a self-operated pressure regulating valve.
Further, the control device for the seal gas of the multi-shaft multi-stage gear assembly type compressor further comprises:
a filter in series between the first air source interface and the second regulator valve.
Further, the control device for the seal gas of the multi-shaft multi-stage gear assembly type compressor also comprises a first check valve and a second check valve;
the first air source interface is connected with the second regulating valve and the first check valve in series and then connected with the second air source interface in parallel;
and the second air source interface is connected with the second check valve in series and then connected with the first air source interface in parallel.
Further, the control device for the sealing gas of the multi-shaft multi-stage gear assembly type compressor also comprises a third regulating valve;
the first air source interface and the second air source interface are connected in parallel and then communicated with the detection end of the detection unit through the third regulating valve;
the third regulating valve is a self-operated pressure regulating valve.
Furthermore, the control device for the sealing gas of the multi-shaft multi-stage gear assembly type compressor also comprises a first stop valve, a second stop valve, a fourth regulating valve and an alarm unit;
the first stop valve, the third regulating valve and the second stop valve are connected in series and then connected in parallel with the fourth regulating valve;
the alarm unit is connected with the control unit.
Further, the compressor is provided with i stages of sealing pieces, wherein i is any integer from 1 to (n-1);
the downstream of the detection unit is communicated with a plurality of pipelines which are connected in parallel, the pipelines are respectively used for being communicated with the i-stage sealing pieces of the compressor in a one-to-one correspondence mode, and the pipelines comprise a first pipeline, a second pipeline and a third pipeline;
the first pipeline is used for communicating with a 1 st stage seal of the compressor;
the second pipeline comprises a first body and a first branch pipeline communicated with the first body, and the first body and the first branch pipeline are sequentially and respectively communicated with an (n-1) th stage sealing element and an nth stage sealing element of the compressor;
the third pipeline comprises a second body and a second branch pipeline communicated with the second body, and the second body and the second branch pipeline are sequentially and respectively communicated with an (n-3) th stage sealing element and an (n-2) th stage sealing element of the compressor;
the quantity of first governing valve is two, and all with the control unit is connected, two first governing valve sets up respectively in proper order first branch pipeline with on the second branch pipeline.
Further, all the pipelines except the first pipeline are respectively provided with a third check valve, and the third check valves on the second pipeline and the third pipeline are respectively positioned at the upstream of the corresponding first regulating valve.
By means of the technical scheme, the invention at least has the following beneficial effects:
the control device for the sealing gas of the multi-shaft multi-stage gear assembled compressor provided by the embodiment of the invention has the advantages that through the arrangement of the first gas source interface, the second gas source interface, the first regulating valve, the detection unit and the control unit, the gas source communicated with the first gas source interface and the second gas source interface can provide gas for the sealing element through the first regulating valve, meanwhile, the detection unit can detect the pressure value in the device and send the pressure value to the control unit in real time, when the pressure value received by the control unit in the device is greater than the preset pressure value, the opening degree of the first regulating valve is automatically controlled to be increased so as to reduce the pressure in the device, when the pressure value received by the control unit in the device is less than the preset pressure value, the opening degree of the first regulating valve is automatically controlled to be reduced so as to increase the pressure in the device, so that the gas provided by the device for, and moreover, misoperation easily caused by manual adjustment is avoided, and the normal work of the compressor is ensured. In addition, according to the technical scheme provided by the embodiment of the invention, the first air source interface and the second air source interface are respectively connected with the two air sources, one air source can be used as a starting air source, and the other air source can be used as a conventional operation air source, namely, the air source generated by the compressor, so that the starting air source supplies air for the sealing element when the compressor is started, and the oil or oil gas at the position of the bearing is prevented from being sucked into the cylinder of the compressor to cause the damage of downstream parts; when the compressor normally operates, the starting air source can be cut off, and the normal operation air source is adopted to supply air for the sealing element, so that the normal operation of the compressor is further ensured.
Drawings
Fig. 1 is a schematic diagram of a control device for seal gas of a multi-shaft multi-stage gear assembly type compressor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control device for sealing gas of a multi-shaft multi-stage gear assembly type compressor according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
As shown in fig. 1, an embodiment of the present invention provides a control device for a multi-shaft multi-stage gear assembly type compressor seal gas, including a first gas source interface 1, a second gas source interface 2, a first regulating valve 3, a detection unit 4 and a control unit; the first air source interface 1 and the second air source interface 2 are respectively used for connecting corresponding air sources, and the first air source interface 1 and the second air source interface 2 are connected in parallel and then communicated with the detection end of the detection unit 4; the detection end of the detection unit 4 is communicated with the inlet end of the first regulating valve 3, the detection unit 4 is used for detecting the pressure value in the control device, the first regulating valve 3 is connected with the control unit, and the outlet end of the first regulating valve 3 is used for being communicated with the sealing element; the control unit is used for receiving the pressure value that the detecting element 4 feedbacks to judge when the pressure value is greater than and predetermine the pressure value, control the aperture of first governing valve 3 and increase, when the pressure value is less than and predetermine the pressure value, control the aperture of first governing valve 3 and reduce.
This controlling means of multiaxis multistage gear assembled compressor seal gas can use on the space division unit of hundred thousand, provides seal gas for the sealing member in the space division unit of hundred thousand, specifically can be connected with the unit through pipeline between the sled. Specifically, the first air source interface 1 can be communicated with a conventional operation air source, namely, an air source generated by the compressor during normal operation, the second air source interface 2 can be communicated with a driving air source, namely, an air source used when the compressor is not used for generating air during driving, the driving air source can be instrument air of a factory, the detection unit 4 can be a pressure sensor for detecting pressure, and the control unit can be a programmable controller, so that the second air source interface 2 can be opened when the compressor is used for driving, the instrument air of the factory is used for supplying air for a sealing element in the compressor, the detection unit 4 detects a pressure value in a device in real time and feeds the pressure value back to the control unit, the control unit controls the opening degree of the first regulating valve 3 according to the pressure value fed back by the detection unit 4, the second air source interface 2 can be cut off when the compressor is used for supplying air for the sealing element, the pressure value in the detection unit 4 real-time detection device is fed back to the control unit, and the opening degree of the first regulating valve 3 is controlled by the control unit according to the pressure value fed back by the detection unit 4, so that the gas provided by the device for the sealing element can enable the sealing element to adapt to the working condition change of the compressor in time, and in addition, the misoperation caused by artificial regulation is avoided, and the normal work of the compressor is ensured. In addition, referring to fig. 2, the control device may further include a bracket, and the first air supply port 1, the second air supply port 2, the first regulating valve 3, the detecting unit 4, the control unit, and the pipelines for communicating the respective components may be installed on the bracket 5 according to a certain installation standard, so as to facilitate the use of the device.
The control device for the sealing gas of the multi-shaft multi-stage gear assembled compressor provided by the embodiment of the invention has the advantages that through the arrangement of the first gas source interface, the second gas source interface, the first regulating valve, the detection unit and the control unit, the gas source communicated with the first gas source interface and the second gas source interface can provide gas for the sealing element through the first regulating valve, meanwhile, the detection unit can detect the pressure value in the device and send the pressure value to the control unit in real time, when the pressure value received by the control unit in the device is greater than the preset pressure value, the opening degree of the first regulating valve is automatically controlled to be increased so as to reduce the pressure in the device, when the pressure value received by the control unit in the device is less than the preset pressure value, the opening degree of the first regulating valve is automatically controlled to be reduced so as to increase the pressure in the device, so that the gas provided by the device for, the preset pressure value can be a pressure value required for ensuring the normal work of the device; and moreover, misoperation easily caused by manual adjustment is avoided, and the normal work of the compressor is ensured. In addition, according to the technical scheme provided by the embodiment of the invention, the first air source interface and the second air source interface are respectively connected with the two air sources, one air source can be used as a starting air source, and the other air source can be used as a conventional operation air source, namely, the air source generated by the compressor, so that the starting air source supplies air for the sealing element when the compressor is started, and the oil or oil gas at the position of the bearing is prevented from being sucked into the cylinder of the compressor to cause the damage of downstream parts; when the compressor normally operates, the starting air source can be cut off, and the normal operation air source is adopted to supply air for the sealing element, so that the normal operation of the compressor is further ensured.
In order to solve the problem that the gas pressure generated by the compressor changes along with the change of the working condition of the compressor, so that the gas pressure entering the first gas source interface 1 is unstable, which is not beneficial to the normal gas supply of the device, referring to fig. 1, in an alternative embodiment, the control device for the sealing gas of the multi-shaft multi-stage gear assembly type compressor may further include a second regulating valve 6; the first air source interface 1 is connected with the second regulating valve 6 in series and then connected with the second air source interface 2 in parallel; the second regulator valve 6 may be a self-operated pressure regulator valve. Through establishing ties a second governing valve 6 through the pipeline on the branch road of first air source interface 1, and this valve is self-operated pressure regulating valve for its aperture size that can be according to low reaches pressure automatic control case, when its low reaches pressure is higher, its case aperture reduces automatically, when its low reaches pressure is less, its case aperture increases automatically, thereby has guaranteed the stability of its low reaches pressure, the device of being convenient for is the normal air feed of sealing member, and simple structure, it is more convenient to use moreover.
In order to solve the problem, referring to fig. 1, in an optional embodiment, the control device for sealing gas of a multi-shaft multi-stage gear assembly type compressor may further include a filter 7, the filter 7 is connected in series between the first gas source interface 1 and the second regulating valve 6, so that the filter 7 may filter out impurities in the gas entering from the first gas source interface 1, it is ensured that no impurities exist in a pipeline at the downstream of the first gas source interface 1, the device is prevented from being blocked, the device is convenient for normal gas supply of the sealing member, and the use is more convenient. The filter 7 has various structural forms as long as it can be connected in series between the first air source interface 1 and the second regulating valve 6 through a pipeline and can filter impurities in the gas generated by the compressor, which is not limited herein.
Further, referring to fig. 1, in an alternative embodiment, the control device for sealing gas of the multi-shaft multi-stage gear assembly type compressor may further include a first check valve 8 and a second check valve 9; the first air source interface 1 is connected with the second regulating valve 6 and the first check valve 8 in series and then connected with the second air source interface 2 in parallel; the second air source interface 2 is connected in series with the second check valve 9 and then connected in parallel with the first air source interface 1. When the compressor is just started, no air source is generated, instrument air communicated by the second air source interface 2 provides air for the device, the first check valve 8 is opened, the instrument air enters the device through the first check valve 8, and the second check valve 9 is closed, so that the instrument air is prevented from entering the first air source interface 1 through the second check valve 9, and the influence on the normal work of the compressor is avoided; when the compressor normally operates, the compressor self generates an air source, and the air pressure generated by the compressor self is larger than the pressure of instrument air, so that the second check valve 9 is opened, the first check valve 8 is closed, the conventional operation air source of the compressor enters the device through the second check valve 9, and the conventional operation air source cannot enter the second air source interface 2, the influence of the high-pressure air source of the operation of the compressor on the normal operation of the instrument air is prevented, the situation that the compressor is just started and operates normally is also realized, the air is supplied into the device through automatic switching of the second air source interface 2 and the first air source interface 1, and the use is more convenient.
Further, referring to fig. 1, in an alternative embodiment, the control device for the seal gas of the multi-shaft multi-stage gear assembly type compressor may further include a third regulating valve 10; the first air source interface 1 and the second air source interface 2 are connected in parallel and then communicated with the detection end of the detection unit 4 through a third regulating valve 10; the third regulator valve 10 may be a self-operated pressure regulator valve. Through establishing ties a third governing valve 10 between the parallel connection node of first air supply interface 1 and second air supply interface 2 and the detection end of detecting element 4, and this valve is self-operated pressure regulating valve for it can be according to the aperture size of low reaches pressure automatic control case, when its low reaches pressure is higher, its case aperture reduces automatically, when its low reaches pressure is less, its case aperture increases automatically, thereby further guaranteed the stability of its low reaches pressure, the device of being convenient for is the normal air feed of sealing member further, moreover, the steam generator is simple in structure, and it is more convenient to use.
Further, referring to fig. 1, in an alternative embodiment, the control device for the seal gas of the multi-shaft multi-stage gear assembly type compressor may further include a first stop valve 11, a second stop valve 12, a fourth regulating valve 13 and an alarm unit; the first stop valve 11, the third regulating valve 10 and the second stop valve 12 are connected in series and then connected in parallel with the fourth regulating valve 13; the alarm unit is connected with the control unit. Such structural design can realize when the control unit judges that the pressure value that detecting element 4 feedbacks changes greatly, can control alarm unit promptly and send alarm information, suggestion operating personnel third governing valve 10 has failed, at this moment, operating personnel can arrive the scene fast and close first stop valve 11 and second stop valve 12, and adjust fourth governing valve 13, so that fourth governing valve 13 can replace third governing valve 10 and carry out normal work, then maintain or change the third governing valve 10 that fails, after the maintenance, closing fourth governing valve 13, it can to open first stop valve 11 and second stop valve 12. Of course, the first stop valve 11, the second stop valve 12 and the fourth regulating valve 13 may be control valves connected to the control unit, and when the control unit determines that the pressure value fed back by the detection unit 4 changes greatly, the control unit controls the alarm unit to send alarm information, and at the same time, controls the first stop valve 11 and the second stop valve 12 to close, and controls the opening of the fourth regulating valve 13 to ensure the normal operation of the device. The alarm unit can be any type of device controlled by the control unit to send out alarm information, such as a buzzer or an indicator light.
Further, referring to FIG. 1, in an alternative embodiment, the compressor may have i stages of seals, where i is any integer from 1 to (n-1); a plurality of pipelines which are connected in parallel are communicated with the downstream of the detection unit 4, and the pipelines are respectively used for being communicated with the i-stage sealing pieces of the compressor in a one-to-one correspondence mode, wherein the pipelines comprise a first pipeline 14, a second pipeline and a third pipeline; a first line 14 for communication with the stage 1 seal of the compressor; the second pipeline comprises a first body 15 and a first branch pipeline 16 communicated with the first body 15, and the first body 15 and the first branch pipeline 16 are sequentially used for being communicated with an (n-1) th stage sealing element and an nth stage sealing element of the compressor respectively; the third pipeline comprises a second body 17 and a second branch pipeline 18 communicated with the second body 17, and the second body 17 and the second branch pipeline 18 are sequentially and respectively communicated with the (n-3) th stage sealing element and the (n-2) th stage sealing element of the compressor; the number of the first regulating valves 3 is two, and the two first regulating valves 3 are connected with the control unit, and the two first regulating valves 3 are sequentially and respectively arranged on the first branch pipeline 16 and the second branch pipeline 18. The branch pipelines communicated with the second pipeline and the third pipeline are arranged to be communicated with sealing elements with corresponding stages in a one-to-one correspondence mode instead of arranging a plurality of parallel pipelines with the same stages as the sealing elements, the first regulating valve 3 is arranged on the branch pipelines instead of arranging the first regulating valve 3 on each pipeline, the control unit controls the opening degree of the first regulating valve 3 on the branch pipelines to realize the regulation of the pressure in all pipelines, namely when the control unit judges that the pressure value fed back by the detection unit 4 is greater than the preset pressure value, the opening degree of the first regulating valve 3 on the branch pipeline is automatically controlled to be increased to reduce the pressure in the device, when the pressure value in the device received by the control unit is less than the preset pressure value, the opening degree of the first regulating valve 3 on the branch pipeline is automatically controlled to be reduced to increase the pressure in the device, so that the gas provided by the device for the sealing elements can enable the sealing elements to adapt to the working condition change of the compressor timely, the structure of the device is simplified, the occupied space is saved, and the cost is reduced.
Because the compressor is pressurized step by step, the pressure from the ith stage seal to the nth stage seal of the compressor is gradually increased, and the leakage of the last stages of seals is large, the leakage is reduced by arranging the first regulating valve 3 on the first branch pipeline 16 and the second branch pipeline 18, and the pipelines of the first branch pipeline 16 and the second branch pipeline 18 are used for communicating the nth stage seal and the (n-2) th stage seal and are regulated by the control unit; moreover, when the control unit receives that the pressure value fed back by the detection unit 4 is zero, the first regulating valve 3 needs to be controlled to be closed so as to prevent the high-pressure gas from flowing back to the device.
In an alternative embodiment, referring to fig. 1, all the lines except the first line 14 are provided with a third check valve 19, respectively, and the third check valves 19 of the second and third lines are located upstream of the corresponding first regulating valves 3, respectively, to prevent gas from flowing in reverse direction, so as to ensure the normal operation of the device.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A control device of seal gas of a multi-shaft multi-stage gear assembly type compressor is characterized by comprising:
the device comprises a first air source interface, a second air source interface, a first regulating valve, a detection unit and a control unit;
the first air source interface is communicated with a conventional operation air source, namely an air source generated by the compressor during normal operation, the second air source interface is communicated with a driving air source, namely an air source used when the compressor is not used for generating air during driving, and the first air source interface and the second air source interface are mutually connected in parallel and then communicated with the detection end of the detection unit;
the detection end of the detection unit is communicated with the inlet end of the first regulating valve, the detection unit is used for detecting the pressure value in the control device, the first regulating valve is connected with the control unit, and the outlet end of the first regulating valve is used for being communicated with a sealing piece;
the control unit is used for receiving the pressure value fed back by the detection unit, judging that the opening of the first regulating valve is increased when the pressure value is larger than a preset pressure value, and controlling the opening of the first regulating valve to be decreased when the pressure value is smaller than the preset pressure value;
the first air source interface is connected with the second regulating valve in series and then connected with the second air source interface in parallel;
the second regulating valve is a self-operated pressure regulating valve.
2. The apparatus for controlling a seal gas of a multi-shaft multi-stage gear assembly type compressor according to claim 1, further comprising:
a filter in series between the first air source interface and the second regulator valve.
3. The control device of seal gas of multi-shaft multi-stage gear assembly type compressor according to claim 1, further comprising a first check valve and a second check valve;
the first air source interface is connected with the second regulating valve and the first check valve in series and then connected with the second air source interface in parallel;
and the second air source interface is connected with the second check valve in series and then connected with the first air source interface in parallel.
4. The control device for seal gas of multi-shaft multi-stage gear assembly type compressor according to claim 1, further comprising a third regulating valve;
the first air source interface and the second air source interface are connected in parallel and then communicated with the detection end of the detection unit through the third regulating valve;
the third regulating valve is a self-operated pressure regulating valve.
5. The control device of the seal gas of the multi-shaft multi-stage gear assembly type compressor according to claim 4, further comprising a first stop valve, a second stop valve, a fourth regulating valve and an alarm unit;
the first stop valve, the third regulating valve and the second stop valve are connected in series and then connected in parallel with the fourth regulating valve;
the alarm unit is connected with the control unit.
6. The seal gas control apparatus of a multi-shaft multi-stage gear assembly type compressor according to claim 1,
the compressor is provided with an i-stage sealing element, wherein i is any integer from 1 to (n-1);
the downstream of the detection unit is communicated with a plurality of pipelines which are connected in parallel, the pipelines are respectively used for being communicated with the i-stage sealing pieces of the compressor in a one-to-one correspondence mode, and the pipelines comprise a first pipeline, a second pipeline and a third pipeline;
the first pipeline is used for communicating with a 1 st stage seal of the compressor;
the second pipeline comprises a first body and a first branch pipeline communicated with the first body, and the first body and the first branch pipeline are sequentially and respectively communicated with an (n-1) th stage sealing element and an nth stage sealing element of the compressor;
the third pipeline comprises a second body and a second branch pipeline communicated with the second body, and the second body and the second branch pipeline are sequentially and respectively communicated with an (n-3) th stage sealing element and an (n-2) th stage sealing element of the compressor;
the quantity of first governing valve is two, and all with the control unit is connected, two first governing valve sets up respectively in proper order first branch pipeline with on the second branch pipeline.
7. The seal gas control apparatus of a multi-shaft multi-stage gear assembly type compressor according to claim 6,
and third check valves are respectively arranged on all the pipelines except the first pipeline, and the third check valves on the second pipeline and the third pipeline are respectively positioned at the upstream of the corresponding first regulating valve.
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| CN103075322A (en) * | 2013-01-14 | 2013-05-01 | 山西潞安矿业(集团)有限责任公司 | Dry gas seal and supply device for compressor |
| CN204783521U (en) * | 2015-06-07 | 2015-11-18 | 成都一通密封有限公司 | Liquid drive supercharging device |
| CN107388041A (en) * | 2017-07-21 | 2017-11-24 | 江苏永钢集团有限公司 | The dual gas supply control system of Pneumatic anti-surging valve |
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2018
- 2018-10-16 CN CN201811205108.9A patent/CN109185143B/en active Active
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Address after: 110869 No. 16 A Development Road, Shenyang Economic and Technological Development Zone, Liaoning Province Patentee after: SHENYANG TURBO MACHINERY Co.,Ltd. Patentee after: Shenyang Blower Works Group Corp. Address before: 110869 No. 16 A Development Road, Shenyang Economic and Technological Development Zone, Liaoning Province Patentee before: SHENYANG TURBO MACHINERY Co.,Ltd. Patentee before: SHENYANG BLOWER WORKS Group Corp. |