CN2215615Y - Lubricating and cooling circualation device for solution pump of lithium bromide machine set - Google Patents
Lubricating and cooling circualation device for solution pump of lithium bromide machine set Download PDFInfo
- Publication number
- CN2215615Y CN2215615Y CN 94201474 CN94201474U CN2215615Y CN 2215615 Y CN2215615 Y CN 2215615Y CN 94201474 CN94201474 CN 94201474 CN 94201474 U CN94201474 U CN 94201474U CN 2215615 Y CN2215615 Y CN 2215615Y
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- CN
- China
- Prior art keywords
- cooling
- solution
- solution pump
- pump
- lubricated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a lubricating and cooling circulation device for the solution pump of a lithium bromide machine set. Solution returning tubes are provided with perfusion tubes which are connected with the outlet end of the water pump of the cryogen of the machine set, and the front ends of the solution returning tubes and the perfusion tubes are respectively provided with electromagnetic valves to control the pure cryogen water of the machine set worked as cooling medium, lubricating and cooling the solution pump through the circulation of the solution returning tubes and the perfusion tubes. The utility model has the advantages of the good effects of lubrication and cooling, the low frequency of fault, low cost, and the improved service life of the solution pump of the machine set.
Description
The utility model relates to a kind of refrigerator solution pump, is a kind of lubricated, cooling-cycle device that is used to improve the lithium-bromide absorption-type refrigerating machine solution pump specifically.Along with the restriction of the world to freon, bromizate the lithium Absorption Refrigerator in the dining room, there is wide application prospect aspect such as hotel, hospital, arenas, office building, oil, chemical industry, metallurgy, industrial production, this technology has not only improved unit quality of product class on the whole, guarantee the long-term normal operation of unit, reduce maintenance expenses, also can prolong the working life of unit.
At present, domestic many producers such as Kaifeng, Jiangyin, Qingdao, go up refrigerator factories such as cold, all produce lithium bromide refrigerator, the canned motorpump that they adopt, have only outer circulation type and in follow two kinds of formulas, for example beyond recycle pump be example, the liquid of lubricating bearings gap of seal ring outer race behind the pump housing enters the lubricated and cooling rear bearing of liquid return pipe, pass through the gap and the lubricated and preceding step bearing of cooling of housing again, after equalizing orifice is got back to the impeller inlet place.The solution pump of unit (comprising generating pump) is no matter which kind of type all realizes lubricated, cooling by the LiBr solution that is transferred.But there is following deficiency:
When 1, unit normally moved, solution temperature all about 38 ℃, when high pressure moves down, can reach about 41 ℃.When the crystallization fault appearred in unit, in order to accelerate molten crystalline substance, the lithium-bromide solution temperature was generally brought up to 50-60 ℃, like this to pump lubricated, cooling is unfavorable, the accident that usually can burn motor.
2, adopt graphite bearing because of shielding the pump that looses, its bearing bore diameter is very little with the gap of axle external diameter, and the diameter difference only is the 0.3-04 millimeter, so require very high to the degree of purity of solution.But because unit corrosion is inevitable, new soln is after operation a period of time, some iron rust always in the solution, and accumulate in and be dissolved in the LiBr solution in the liquid capsule, in case reach certain quantity, will strengthen bearing wear even stop up the bearing lubrication gap, cause the bearing premature damage or burn motor.When the unit crystallization is handled, flow back into solution in the liquid capsule and be mixed with to be struck and shake, not dissolved LiBr lenslet can cause above-mentioned fault equally for the moment.
When 3, changing canned motorpump, unit must be exposed in the atmosphere, so the frequent breakage of solution pump is changed, must increase the number of times that unit exposes atmosphere, increases the number of times that unit exposes atmosphere, increases the unit corrosion, the working life of having reduced unit.
4, because the cooling of solution pump generating pump is bad, use producer can only adopt externally to water at present and drench the cooling way with industry water, promptly can not effect a permanent cure also wastes the water source.
The purpose of this utility model provides lubricated, the cooling-cycle device of a kind of improved lithium bromide unit solution pump, thereby improves lubricated, the cooling situation of solution pump, guarantees the long-term operation continuously of unit, reduces the working life that the number of times that exposes atmosphere has improved pump.
For achieving the above object, technical solution of the present utility model is: have the outlet end that an indusion tube is connected to the unit refrigerant pump is installed on liquid return pipe, and on the front end of returning pipe and indusion tube, be respectively equipped with solenoid valve, by opening of solenoid valve on the indusion tube, make the pure cryogen water of unit itself be lubricated, cooling medium, cool off solution pump is lubricated by the rear side of indusion tube and liquid return pipe respectively.
The utlity model has following advantage and effect:
1, because solution pump has increased the cryogen water circulation means, adopts pure cryogenic coolant water, so to the lubricating of solution pump, good cooling results, the working life of having improved the unit solution pump.Reduced maintenance and protected expense, guaranteed that unit can normally move for a long time.Even the molecule crystal when being mixed with some iron rust or molten crystalline substance in the solution can not arrive bearing portion, improved the adaptive capacity of pump.
2, because of the New Cycle system has good lubricated, cooling effect, do not need to take outside tap water to water the pouring cool-down method, saved water resources.
3, because of the lubricated of solution pump middle (center) bearing be cooled to cryogenic coolant water, so the crystallization fault occurs at unit, when carrying out molten brilliant the processing, solution temperature also can further improve than use original system structure, to reach the purpose of fast instant crystalline substance.And the bearing of pump is still protected good lubricated and cooling, thereby guarantees the normal operation of pump.
4, reduce the fault of solution pump, reduced the number of times of unit exposure atmosphere, prolonged the working life of unit.
Description of drawings:
Fig. 1 is that lithium bromide unit solution pump is lubricated, the cooling-cycle device structural drawing.
Embodiment does concrete description in conjunction with the accompanying drawings:
See Fig. 1, utilize an indusion tube 5 is installed on liquid return pipe 3, make the other end of failing pipe 5 be connected to the outlet end of unit refrigerant pump, utilize the cryogen water of cryogenic fluid pump to import circulation means.And on the front end of liquid return pipe 3 and indusion tube 5, be respectively equipped with solenoid valve 4 solenoid valves 6, also can on indusion tube 5, increase a flow control valve according to the outlet pressure and the cooling flow of cryogenic fluid pump, when refrigerant pump moves, solenoid valve 4 cuts out, solenoid valve 6 is opened, be lubricated, cooling medium from the pure low temperature in the refrigerant pump (about 5 ℃) cryogen water, rear side by indusion tube 5 and liquid return pipe 3 enters the 7 lubricated coolings of pump housing rear bearing, lubricate and the cooling fore bearing through the axial clearance of housing again, after equalizing orifice is got back to impeller 1 inlet.
When new system boot or cryogen water regeneration, only need about 30 minutes refrigerant pumps just can open.Because of refrigerant pump stop during this period of time in, solenoid valve 4 is opened, and solenoid valve 6 cuts out, by the solution in the canned motorpump by the lubricated cooling work of liquid return pipe 3 circulatory system inputs.
Except that the rear side Connecting format of above-mentioned indusion tube (5) and liquid return pipe (3), transfusion (5) also can be connected with the filter (8) on the liquid return pipe (3) or the rear seal-cover (9) of canned motorpump.
New system after considering to improve is to the influence of canned motorpump outlet solution concentration.
The cooling of canned motorpump, lubricated water are mainly kept by circulatory system inlet and outlet pressure difference.With 100PN-14 type outer circulation canned motorpump is example, calculates cooling, and the flow of lubricated water is through surveying the long L=600mm of outside liquid return pipe, φ 8mm.Home loop is by waiting long tube to consider that length overall is 1200mm.The pressure loss of the circulatory system should equal the poor (14mH of system's inlet and outlet pressure
2O), consider solution viscosity, filter and irregular loop, local losses is got 100% of linear loss.
Calculate according to the empirical correlation in the plumbing:
H＝L×2i＝2.4×0.00107＝ (V
2)/(di
1.3)
14MH
2O＝2.4×0.00107＝ (V
2)/((0.008)
1.3)
V＝3.2（M／S）
Q＝V·S＝3.2×3.14×（ 4/1000 ）
2
＝0.0016m
3／S
＝0.16L／S。
If by the circular flow of new system, the cryogen water that flow such as is changed to calculates, to the influence of pump discharge solution concentration.
The fluid flow that 100PN-14 type canned motorpump per second is carried is 8.34L/S, then LiBr content in the solution carried of per second=(8.34-0.16) * 1.53 * 50%=6.258
Solution solution concentration=(LiBr content)/(50% solution quality+cooling liquid quality) that (annotate and carry LiBr solution by 50%, proportion is 1.53) then carries
＝ 6.258/(（8.34－0.16）×1.53＋0.16×1)
＝49.4％
Change in concentration=50%-49.4%=0.6%
This changes unit and allows, can not influence unit operation at all, and when estimation, drag losses estimates that this flow value very conservative, that draw is bigger than actual value, that is to say after the improvement new lubricated, cooling system is also little than above-mentioned value to the influence of pump discharge solution concentration.
Claims (3)
1, lithium bromide unit solution pump is lubricated, cooling-cycle device, comprise that having liquid return pipe on the solution pump housing constitutes, it is characterized in that having and go up the outlet end that installation one indusion tube (5) is connected to the unit refrigerant pump at liquid return pipe (3), and on the front end of liquid return pipe (3) and indusion tube (5), be respectively equipped with solenoid valve (4,6), open by the solenoid valve (6) on the indusion tube (5), making the pure cryogen water of unit itself is lubrication cooling medium, cools off solution pump is lubricated by indusion tube (5) and liquid return pipe (3) rear side respectively.
2,, cooling-cycle device lubricated by the described lithium bromide unit of claim 1 solution pump is characterized in that indusion tube (5) also can be connected with the filter (8) on the liquid return pipe (3) or the rear seal-cover (9) of canned motorpump.
3,, cooling-cycle device lubricated by the described lithium bromide unit of claim 1 solution pump is characterized in that also being provided with flow control valve on the indusion tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94201474 CN2215615Y (en) | 1994-01-15 | 1994-01-15 | Lubricating and cooling circualation device for solution pump of lithium bromide machine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94201474 CN2215615Y (en) | 1994-01-15 | 1994-01-15 | Lubricating and cooling circualation device for solution pump of lithium bromide machine set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2215615Y true CN2215615Y (en) | 1995-12-20 |
Family
ID=33821522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94201474 Expired - Fee Related CN2215615Y (en) | 1994-01-15 | 1994-01-15 | Lubricating and cooling circualation device for solution pump of lithium bromide machine set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2215615Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322840A (en) * | 2018-08-12 | 2019-02-12 | 西安交通大学 | A kind of centrifugal coolant pump |
-
1994
- 1994-01-15 CN CN 94201474 patent/CN2215615Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322840A (en) * | 2018-08-12 | 2019-02-12 | 西安交通大学 | A kind of centrifugal coolant pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |