CN102128270A - Differential pressure sealing leakage prevention method - Google Patents
Differential pressure sealing leakage prevention method Download PDFInfo
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- CN102128270A CN102128270A CN2011100623884A CN201110062388A CN102128270A CN 102128270 A CN102128270 A CN 102128270A CN 2011100623884 A CN2011100623884 A CN 2011100623884A CN 201110062388 A CN201110062388 A CN 201110062388A CN 102128270 A CN102128270 A CN 102128270A
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Abstract
The invention relates to a differential pressure sealing leakage prevention method, which comprises the following steps of: forming a sealing area between a power source motor and driven equipment, wherein the sealing area comprises a position requiring sealing leakage prevention, shaft extensions on two sides of transmission torque, a coupler and the like; conveying gases such as nitrogen and the like to the sealing area through a gas inlet pipe arranged in the sealing area, and adjusting gas pressure to ensure that the pressure of the sealing area is slightly higher than pressure in the driven equipment so as to form a pressure difference; and automatically adjusting and controlling the pressure difference to keep the pressure difference basically constant by using a control system consisting of a sensing element and a microprocessor, namely adjusting and controlling the gas intake and gas pressure of the sealing area by an electric control differential pressure, position control differential pressure or gas control differential pressure control method to keep certain differential pressure so as to realize sealing leakage prevention. The method is simple, applicable, good in effect and suitable for a machine requiring sealing leakage prevention in the conventional mechanical drive.
Description
Technical field
The present invention relates to a kind of method of differential pressure sealed against leakage, belong to mechanical seal leak proof technology field.
Background technique
In traditional mechanical transmission, power source (as motor) and by the joint between the transmission device (as feed screw, stirrer, centrifugal pump etc.) all in the equipment outside, by carry-over moments such as coupling or gear-boxes.It no matter is motor as power source, still by the equipment of transmission, tend to gapped between the shaft extension of rotation and the static equipment inside, if liquid or other harmful gases are arranged by the material of the device interior work of transmission, then can be by the surrounding atmosphere that permeates of the gap between revolving spindle and the device interior, operator and surrounding enviroment are polluted, even the sealing of equipment transmission shaft is fine, yet unavoidable internal gas or liquid do not leak out.
Summary of the invention
The objective of the invention is, in order to solve the sealing problem that exists between traditional mechanical transmission shaft and the equipment, the present invention discloses a kind of method of differential pressure sealed against leakage, is used to solve the sealing problem of mechanical transmission rotating component and equipment.
Know-why of the present invention is, at the power source motor end cap and between by the equipment of transmission, a sealing area is set, carry certain gas to sealing area, make pressure P in the sealing area a little more than by the pressure P in the equipment of transmission 1, form a pressure difference, just can stop by gas in the equipment of transmission or liquid and pass through the shaft extension gap, reach the purpose of sealed against leakage to external leakage.
Technological scheme of the present invention is,
(1) at power source motor and between by the equipment of transmission, a sealing area is set, comprise the shaft extension, coupling on the position that needs sealed against leakage, carry-over moment two limits etc. in the zone, because motor and be stationary object by the equipment of transmission, this sealing is not difficult;
(2) sealing area is provided with air inlet pipe hole, and links to each other with the pipeline of external certain gas;
(3) sealing area is provided with differential pressure transducer outward, respectively with the seal area admission line with linked to each other by the equipment of transmission, to obtain the differential pressure value between the two;
(4) carry certain gas to sealing area, and adjustments of gas pressure, make sealing area pressure a little more than by the pressure in the equipment of transmission, form pressure reduction;
(5) control system of utilizing sensor and microprocessor to form automatically adjusts to pressure reduction and controls, and poor substantially constant keep-ups pressure.
Certain gas of the present invention refers to air, nitrogen or inert gas, can select for use according to actual use condition.
The present invention can adopt automatically controlled differential pressure, position control differential pressure or gas control differential pressure controlling method control sealing area air inflow and air pressure size according to by the material variety difference in the equipment of transmission, keeps certain differential pressure, realizes sealed against leakage.
Automatically controlled differential pressure of the present invention refers to by differential pressure transducer and electronic control unit (ECU) system differential pressure is controlled automatically.Differential pressure transducer is delivered to electronic control unit (ECU) with the pressure difference signal, ECU judges according to this pressure difference whether sealing area pressure changes, if sealing area pressure is lower than by the pressure in the equipment of transmission, then control and regulate the injection amount that enters sealing area gas automatically.
Control differential pressure in position of the present invention refers to for when material is liquid in the equipment of transmission, controls by the liquid level differential pressure.
Gas control differential pressure of the present invention refers to when being produced gas by material in the equipment of transmission, controls by the gas control differential pressure.
The present invention's beneficial effect compared with the prior art is, the present invention only needs to transform slightly on the basis of former transmission device, just can solve the sealed against leakage problem in the traditional mechanical transmission, the present invention is simple, suitable, effective, is applicable to the machinery that need make sealed against leakage in the traditional mechanical transmission.
Description of drawings
Fig. 1 is a traditional mechanical drive mechanism schematic representation;
Fig. 2 is that differential pressure sealed against leakage method of the present invention is implemented schematic representation;
Picture in picture number: the 1st, motor; The 2nd, the motor shaft extension; The 3rd, by the transmission device shaft extension; The 4th, by transmission device; The 5th, sealing area; The 6th, the sealing area suction port; The 7th, by the gap between transmission device shaft extension rotating part and the equipment; P is a sealing area air pressure; P1 is by the transmission device air pressure inside; P2 is a motor interior air pressure.
Embodiment
The specific embodiment of the present invention is an example with the motoring centrifugal pump, as shown in Figure 2.
1 is motor among the figure, the 2nd, and the shaft extension of motor; The 4th, by the transmission device centrifugal pump, the 3rd, the shaft extension of centrifugal pump couples together two shaft extensions by coupling between motor and the centrifugal pump.Between motor 1 and centrifugal pump 4, sealing area 5 is set, the shaft extension 3 of shaft extension 2, coupling and the centrifugal pump of motor is included in wherein, sealing area 5 is isolated with extraneous sealing, only stay sealing area suction port 6, and in the sealing area 5 pressure transducer being set, the control system outer with seal area links to each other.When driving mechanism is worked, from sealing area suction port 6 supplying nitrogen in sealing area 5, and test sealing area internal pressure size, regulate air pressure and be slightly larger than the interior gas pressure of centrifugal pump, and keep pressure difference.Present embodiment is controlled differential pressure automatically by differential pressure transducer and electronic control unit (ECU) system.Differential pressure transducer is delivered to electronic control unit (ECU) with the pressure difference signal, ECU judges according to this pressure difference whether sealing area pressure changes, if 5 pressure is lower than by the pressure in the equipment of transmission in the sealing area, then control and regulate the injection amount that enters sealing area gas automatically, make pressure P in the sealing area 5 a little more than the pressure P in the centrifugal pump 1, also be slightly larger than the pressure P 2 in the motor, force the gas in the centrifugal pump from the gap 7 of transmission shaft, to leak out, reach the purpose of sealed against leakage.
Claims (3)
1. the method for a differential pressure sealed against leakage is characterized in that,
At power source motor and between by the equipment of transmission, a sealing area is set, comprise the shaft extension, coupling on the position that needs sealed against leakage, carry-over moment two limits etc. in the zone;
Suction tude by the sealing area setting is carried certain gas to sealing area, and adjustments of gas pressure, makes sealing area pressure a little more than by the pressure in the equipment of transmission, forms pressure reduction;
The control system of utilizing sensor and microprocessor to form automatically adjusts to pressure reduction and controls, and poor substantially constant keep-ups pressure.
2. the method for a kind of differential pressure sealed against leakage according to claim 1 is characterized in that, described certain gas refers to air, nitrogen or inert gas.
3. the method for a kind of differential pressure sealed against leakage according to claim 1, it is characterized in that, pressure reduction is automatically adjusted and control comprises and adopts automatically controlled differential pressure, position control differential pressure or gas control differential pressure controlling method is regulated and control sealing area air inflow and air pressure size, keep certain differential pressure, realize sealed against leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100623884A CN102128270A (en) | 2011-03-16 | 2011-03-16 | Differential pressure sealing leakage prevention method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100623884A CN102128270A (en) | 2011-03-16 | 2011-03-16 | Differential pressure sealing leakage prevention method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102128270A true CN102128270A (en) | 2011-07-20 |
Family
ID=44266477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100623884A Pending CN102128270A (en) | 2011-03-16 | 2011-03-16 | Differential pressure sealing leakage prevention method |
Country Status (1)
| Country | Link |
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| CN (1) | CN102128270A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494143A (en) * | 2011-11-25 | 2012-06-13 | 哈尔滨电机厂有限责任公司 | Equipressure leakage preventing method for main shaft seal of ocean tide energy generating set |
| CN103748389A (en) * | 2011-08-31 | 2014-04-23 | 伊利诺斯工具制品有限公司 | Hydraulic seal assembly for a thermoplastic material dispensing valve assembly |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1059098A (en) * | 1964-06-09 | 1967-02-15 | Parsons C A & Co Ltd | Improvements in and relating to shaft sealing arrangements |
| JPS5569793A (en) * | 1978-11-20 | 1980-05-26 | Mitsubishi Heavy Ind Ltd | Sealing system for axis of blower for pressure transportation of poisonous gas |
| JPS58210378A (en) * | 1982-05-29 | 1983-12-07 | Matsushita Electric Ind Co Ltd | Fluid machinery driven by heat engine |
| CN2572145Y (en) * | 2002-10-08 | 2003-09-10 | 李彤 | Rotary sealing structure for air seal |
| JP2007211741A (en) * | 2006-02-13 | 2007-08-23 | Heishin Engineering & Equipment Co Ltd | Shaft seal device of pump |
| CN101050863A (en) * | 2007-05-14 | 2007-10-10 | 神华集团有限责任公司 | Method and device for producing coal water fluid |
| CN201490807U (en) * | 2009-06-05 | 2010-05-26 | 中国原子能科学研究院 | Sealing device used between motor and structural component |
-
2011
- 2011-03-16 CN CN2011100623884A patent/CN102128270A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1059098A (en) * | 1964-06-09 | 1967-02-15 | Parsons C A & Co Ltd | Improvements in and relating to shaft sealing arrangements |
| JPS5569793A (en) * | 1978-11-20 | 1980-05-26 | Mitsubishi Heavy Ind Ltd | Sealing system for axis of blower for pressure transportation of poisonous gas |
| JPS58210378A (en) * | 1982-05-29 | 1983-12-07 | Matsushita Electric Ind Co Ltd | Fluid machinery driven by heat engine |
| CN2572145Y (en) * | 2002-10-08 | 2003-09-10 | 李彤 | Rotary sealing structure for air seal |
| JP2007211741A (en) * | 2006-02-13 | 2007-08-23 | Heishin Engineering & Equipment Co Ltd | Shaft seal device of pump |
| CN101050863A (en) * | 2007-05-14 | 2007-10-10 | 神华集团有限责任公司 | Method and device for producing coal water fluid |
| CN201490807U (en) * | 2009-06-05 | 2010-05-26 | 中国原子能科学研究院 | Sealing device used between motor and structural component |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103748389A (en) * | 2011-08-31 | 2014-04-23 | 伊利诺斯工具制品有限公司 | Hydraulic seal assembly for a thermoplastic material dispensing valve assembly |
| CN103748389B (en) * | 2011-08-31 | 2016-06-01 | 伊利诺斯工具制品有限公司 | For the hydraulic seal of thermoplastic material distribution valve assembly |
| CN102494143A (en) * | 2011-11-25 | 2012-06-13 | 哈尔滨电机厂有限责任公司 | Equipressure leakage preventing method for main shaft seal of ocean tide energy generating set |
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Application publication date: 20110720 |