CN201884474U - Spindle bearing protecting system of drum type rotary filter screen of power station - Google Patents
Spindle bearing protecting system of drum type rotary filter screen of power station Download PDFInfo
- Publication number
- CN201884474U CN201884474U CN2010201261650U CN201020126165U CN201884474U CN 201884474 U CN201884474 U CN 201884474U CN 2010201261650 U CN2010201261650 U CN 2010201261650U CN 201020126165 U CN201020126165 U CN 201020126165U CN 201884474 U CN201884474 U CN 201884474U
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- oil
- bearing
- bearing support
- power station
- measuring device
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Abstract
The invention relates to a spindle bearing protecting system of a drum type rotary filter screen of a power station. At present, a traditional spindle is sealed by a sealing part and lubricated by calcium base grease or lubricant filled in a spindle bearing, thus enabling outside seawater (fresh water) to enter the bearing seat easily and corrod the bearing. The spindle bearing protecting system of the drum type rotary filter screen of the power station comprises an oil pressure loop, an oil level measuring device, a water level measuring device and a programmable logic controller (PLC), wherein an oil inlet pipe and an oil outlet pipe of the oil pressure loop are respectively communicated with an oil tank and the cavity of a bearing seat, the oil level measuring device is communicated with the cavity of the bearing seat, and the PLC is connected with the oil level measuring device and the water level measuring device. The PLC judges the difference between the oil level and the water level and compares the difference with a set value, thus judging whether the system works normally, being capable of effectively preventing seawater from immersing the spindle bearing, and further achieving the purpose of protecting the bearing.
Description
Technical field:
The utility model relates to the improvement of the equipment for filtering water of nuclear power station or heat power station, specifically is meant power station cydariform rotary sieve main shaft bearing Protective system.
Background technique:
The cydariform rotary sieve has that water amount is big, the driving mechanism reliable operation, operate steadily, characteristics such as rate of fault is low, be mainly used on higher nuclear power of safety class or the heat power station project.Cydariform filter screen main shaft Lubrication of Rolling Contact Bearing and sealing are as the important component part of cydariform filter screen; because its working environment is advanced the influence that the water water level just changes; axis system is immersed in the water more than the water surface sometimes sometimes; if the bearing support lubrication effect is bad or poorly sealed; the working life of rolling bearing and main shaft will directly be influenced; simultaneously; because cydariform filter screen diameter is generally Φ 17 to Φ 22m; width is 2 to 7m; the big quality of equipment profile is heavier, checks; inconvenient maintenance, and power station cydariform filter screen does not generally allow the long period to shut down (overhaul life is 4 years) in an overhaul life; for this reason, the lubricated and sealing of axis system just seems important.And the lubricated and sealing of traditional axis system is to adopt Sealing to seal, filling calcium grease or lubricant oil are lubricated in main shaft bearing, this kind mode can not judge whether the sealing of lubricant oil is good reliable, often make extraneous seawater (or fresh water) enter in the bearing support easily, heavy corrosion bearing not only also has influence on working life of axis system simultaneously.
The model utility content:
The technical problems to be solved in the utility model provides the main shaft bearing Protective system of a kind of power station cydariform rotary sieve and the controlling method of this control system thereof; it adopts the principle and the water-head surveying of connecting vessels; solve cydariform rotary sieve main shaft Protective system sea water resistance (or fresh water) etching problem; prevent that seawater (or fresh water) from entering bulging host's axle bearing seat internal corrosion bearing, reach the protection axis system purpose in working life.
For solving the problems of the technologies described above, the main shaft bearing Protective system of power station of the present utility model cydariform rotary sieve comprises:
Oil hydraulic circuit is by forming into and out of oil pipe connection top petrol tank and bearing support inner chamber;
Oil level measuring device is used to measure the oil level height of above-mentioned bearing support inner chamber, and is communicated with the bearing support inner chamber;
Level measurement device is used to measure the height of filter screen water level, is arranged on the influent side of drum net;
The PLC control gear sends alarm signal after being used to judge the difference of oil level and water level, is connected respectively with level measurement device with oil level measuring device.
The upper end cap of above-mentioned bearing support is provided with into and out of hydraulic fluid port, into and out of hydraulic fluid port be connected into and out of oil pipe; The end cap of bearing support is provided with the oil level detection mouth, and the oil level detection mouth is connected with oil level measuring device.
Be provided with packing seal element between the main shaft sleeve of above-mentioned bearing support inboard and the bearing support, packing seal element is provided with the tight-push unit that is connected with bearing support.
Above-mentioned oil level measuring device is a pressure transmitter.
Above-mentioned bearing support is lower than the fuel tank setting.
Above-mentioned tight-push unit is a stud.
The utility model has following advantage and effect with respect to prior art:
1, the utility model adopts the principle of mechanical connecting vessels, setting is higher than the fuel tank of main spindle's, make in the fuel tank lubricant oil through oil filler pipe flow into main shaft each the end bearing support in, constitute the intrasystem oil level of connecting vessels and be higher than water level in the hydroecium all the time by making, make the oil pressure of bearing support inside be higher than the hydraulic pressure of bearing support outside all the time, utilize pressure difference to stop current to advance in the bearing support, realize the protection of main shaft bearing, simultaneously, measure oil level and water level respectively by oil level measuring device and level measurement device, when water flooding bearing support when (water level is higher than more than the pedestal base), require oil level to be higher than water level certain numerical value (to guarantee that oil pressure is greater than the outer hydraulic pressure of bearing support in the bearing support), prevent that seawater (or fresh water) from flowing in the bearing support, sends alarm signal during less than setting value; When oil level is lower than the withered oil level value of setting when water level is lower than pedestal base and in the bearing support, send alarm signal, remind the staff to need to refuel,, prevent that seawater (or fresh water) from immersing bearing to increase pressure difference.
2, adopt packing seal element between axle sleeve and the bearing support, its sealing principle is: will have compressibility and elastic filler is put into bearing support, be fixed by stud after with gland its axial compression, make filler produce radially elasto plastic deformation, stop up the gap, realize sealing, therefore, not only good sealing effect, seal degree can be adjusted, and the while is simple in structure, mounting or dismounting are convenient, with low cost.
3, owing to spindle speed low (less than 0.5r/min), operating ambient temperature low (being in seawater or the fresh water) adopt thin oil lubricant, its operating temperature can not surpass lubricated oil flash; Its condensation point of thin oil that viscosity is lower is also low, and is mobile strong, can enter the little friction pair in gap rapidly and play lubrication, better effects if.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is pressure transmitter assembling schematic representation.
Among the figure, 1-bearing, 2-bearing support, 3-main shaft, 4-end cap, 5-upper end cap, 6-axle sleeve, 7-packing seal element, 8-be into and out of hydraulic fluid port, 9-oil level detection mouth, 10-draining valve, 11-O RunddichtringO, 12-stud, 13-pressure transmitter, 14-pedestal.
Embodiment:
The utility model adopts the principle of mechanical connecting vessels, constitute the intrasystem oil level of connecting vessels and be higher than water level in the hydroecium all the time by making, make the oil pressure of bearing support inside be higher than the hydraulic pressure of bearing support outside all the time, utilize pressure difference to stop current to enter in the bearing support, realize the protection of main shaft bearing.
Referring to Fig. 1, the main shaft bearing Protective system of a kind of power station of the present utility model cydariform rotary sieve, comprise oil hydraulic circuit, oil level measuring device, level measurement device and PLC control gear, by connecting to form into and out of oil pipe, oil hydraulic circuit guarantees that fuel tank communicates with bearing support 2 inner chamber fluid by bearing support 2 and fuel tank in oil hydraulic circuit; Promptly by on the upper end cap of the bearing support 2 of rolling bearing 1 upper end, offer with bearing support 2 intracavity inter-connections into and out of hydraulic fluid port 8, into and out of oil pipe be connected into and out of hydraulic fluid port 8, fuel tank 16 can be arranged on the platform of drum net both sides, but it highly is higher than bearing support 2; The upside of the end cap 4 of bearing support is provided with oil level detection mouth 9, and oil level detection mouth 9 is connected with oil level measuring device, and the downside of the end cap 4 of bearing support is provided with draining valve 10, and draining valve 10 is used to get rid of waste oil; Oil level measuring device can be a pressure transmitter 13, and referring to Fig. 2, pressure transmitter 13 is arranged on a side of bulging reticulum body 14, and is connected with oil level detection mouth 9 by the cavity in the pedestal 14; Level measurement device is arranged on the influent side of drum net, and level measurement device and oil level measuring device send alarm signal after judging water level and oil level height by connected PLC control gear.
Simultaneously, between the main shaft 3 of rolling bearing 1 inboard and bearing support 2, be arranged with O RunddichtringO 11 successively from inside to outside, axle sleeve 6 and packing seal element 7, axle sleeve 6 is set in the step surface of main shaft 3, its front end is near the embedded O RunddichtringO 11 in step surface place, O RunddichtringO 11, axle sleeve 6 and packing seal element 7 threes are made as one with sealing between bearing support 2 and the main shaft 3, the outside of axle sleeve 6 and packing seal element 7 is pressed abd fixed on it respectively on main shaft 3 and the bearing support 1 by stud 12, packing seal element 7 is for having compressibility and elastic filler is put into Stuffing box, with gland with its axial compression, make filler produce radially elasto plastic deformation, stop up the gap, realize sealing.
The utility model in use, PLC control gear alarm signal in two kinds of situation:
(1) is higher than the spindle bearing holder base plate when above when water level before the cydariform filter screen, for guaranteeing that oil pressure is all the time greater than the outer hydraulic pressure of bearing support in the bearing support, prevent that seawater (or fresh water) from flowing in the bearing support 2, require oil level to be higher than water level certain numerical value Δ h height (to guarantee that oil pressure is greater than the outer hydraulic pressure of bearing support in the bearing support), whether the oil level that the PLC control gear should be differentiated in the spindle bearing holder nets the difference of preceding water level greater than oil pressure difference setting value Δ h with drum, if greater than oil pressure difference setting value Δ h, the normal operation of drum net; If less than oil pressure difference setting value Δ h, then PLC control gear inner main axis lubricant level alarm circuit is connected, the PLC control gear sends the acoustooptic alarm signal, illustrates that existing oil leaks in the bearing support 2, reminds the operator on duty that sealed member is also changed or measured in oiling in spindle bearing holder;
(2) be lower than the spindle bearing holder base plate when following when water level before the cydariform filter screen, oil pressure in the spindle bearing holder 2 is all the time greater than hydraulic pressure, water can not flow in the bearing support, at this moment, the PLC control gear only need judge whether the spindle oil oil level gets final product greater than the withered oil level of setting of spindle bearing holder, be that (this value is a definite value to the PLC control gear with the withered oil level value of the main shaft of spindle oil oil level and setting, can in PLC control gear PLC program, set in advance) compare, when the former during greater than the latter, the normal operation of drum net; When the former during less than the latter, the withered oil level alarm circuit of PLC control gear inner main axis is connected, the PLC control gear sends withered oil level acoustooptic alarm signal, reminds operator on duty's oiling in spindle bearing holder;
This setting value Δ h calculates according to following formula:
Δ h oil pressure difference setting value, ρ 1: the proportion (high ambient temperature) of oil, ρ 2: the proportion of water, h: the water level and alignment of shafts mark height difference before the net.
Because fuel tank 14 is higher than spindle bearing holder 2 positions, and the highest water level that is higher than the hydroecium influent side, the lubricant oil warp in the fuel tank flow in bearing support of each end of main shaft into and out of oil pipe, and turns back to fuel tank separately, by the draining valve 10 of lowest part on the bearing support shell, can regularly discharge waste oil.
Simultaneously, when the fuel consumption of bearing support 2 increases more in the past, also can judge indirectly this moment packing seal element and shaft room gap increase, the sealability reduction, when being Δ h greater than the difference of water level and oil level, may leak, can't continue to use as packing seal element or axle sleeve serious wear and then need change packing seal element 7, thereby improve sealability, during replacing, only need dismantle stud 12 and can change.
Claims (6)
1. the main shaft bearing Protective system of a power station cydariform rotary sieve comprises:
Oil hydraulic circuit is by forming into and out of oil pipe connection top petrol tank (14) and bearing support (2) inner chamber;
The oil level measuring device that is used for measurement axis bearing (2) inner chamber level height is communicated with bearing support (2) inner chamber;
Be used to measure the level measurement device of filter screen height of water level, be arranged on the influent side of drum net;
Be used to judge after the difference of oil level and water level and send the PLC control gear of alarm signal, be connected respectively with level measurement device with oil level measuring device.
2. the main shaft bearing Protective system of a kind of power station according to claim 1 cydariform rotary sieve is characterized in that: the upper end cap of described bearing support (5) is provided with into and out of hydraulic fluid port (8), into and out of hydraulic fluid port (8) be connected into and out of oil pipe; The end cap of bearing support (4) is provided with oil level detection mouth (9), and oil level detection mouth (9) is connected with oil level measuring device.
3. the main shaft bearing Protective system of a kind of power station according to claim 1 and 2 cydariform rotary sieve, it is characterized in that: be provided with packing seal element (7) between main shaft sleeve (6) that described bearing support (2) is inboard and the bearing support (2), packing seal element (7) is provided with the tight-push unit that is connected with bearing support (2).
4. the main shaft bearing Protective system of a kind of power station according to claim 1 and 2 cydariform rotary sieve is characterized in that: described oil level measuring device is pressure transmitter (13).
5. the main shaft bearing Protective system of a kind of power station according to claim 3 cydariform rotary sieve, it is characterized in that: described bearing support (2) is lower than the fuel tank setting.
6. the main shaft bearing Protective system of a kind of power station according to claim 3 cydariform rotary sieve is characterized in that: described tight-push unit is stud (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201261650U CN201884474U (en) | 2010-03-09 | 2010-03-09 | Spindle bearing protecting system of drum type rotary filter screen of power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201261650U CN201884474U (en) | 2010-03-09 | 2010-03-09 | Spindle bearing protecting system of drum type rotary filter screen of power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884474U true CN201884474U (en) | 2011-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201261650U Expired - Lifetime CN201884474U (en) | 2010-03-09 | 2010-03-09 | Spindle bearing protecting system of drum type rotary filter screen of power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884474U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799049A (en) * | 2010-03-09 | 2010-08-11 | 陕西煤炭建设公司管件设备厂 | Mainshaft bearing protection system of drum rotary strainer in power station and control method thereof |
-
2010
- 2010-03-09 CN CN2010201261650U patent/CN201884474U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799049A (en) * | 2010-03-09 | 2010-08-11 | 陕西煤炭建设公司管件设备厂 | Mainshaft bearing protection system of drum rotary strainer in power station and control method thereof |
| CN101799049B (en) * | 2010-03-09 | 2012-05-23 | 陕西煤炭建设公司管件设备厂 | Mainshaft bearing protection system of drum rotary strainer in power station and control method thereof |
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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: 20110629 Effective date of abandoning: 20120523 |