CN2591233Y - Diesel engine rear oil-sealing negative pressure anti-leaking apparatus - Google Patents
Diesel engine rear oil-sealing negative pressure anti-leaking apparatus Download PDFInfo
- Publication number
- CN2591233Y CN2591233Y CN 02216800 CN02216800U CN2591233Y CN 2591233 Y CN2591233 Y CN 2591233Y CN 02216800 CN02216800 CN 02216800 CN 02216800 U CN02216800 U CN 02216800U CN 2591233 Y CN2591233 Y CN 2591233Y
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- CN
- China
- Prior art keywords
- diesel engine
- groove
- oil sealing
- flywheel casing
- negative pressure
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- Expired - Lifetime
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model relates to a rear oil sealing negative-pressure anti-leakage device for a diesel engine. The rear oil sealing negative-pressure anti-leakage device for a diesel engine comprises an output flange (7), a flywheel casing (4) and a spiral oil sealing tank (8) which is positioned on an excircle of the output flange. An annular groove (11) is processed on an inner circle of the flywheel casing corresponding to a position of the tail end of the spiral oil sealing tank, one end of an air suction pipe (2) which penetrates the flywheel casing is communicated with an air inlet pipe (1) of the diesel engine, and the other end of the air suction pipe is communicated with the groove. When engine oil is leaked into the groove through the spiral oil sealing tank, the effect of negative pressure generated in the groove is larger than the effect of the negative pressure generated by relative movement among a flywheel and two end surfaces of the flywheel casing because of the suction effect of an intake stroke of the diesel engine in natural suction, and therefore, the engine oil can not leak outwards. The device with simple structure and convenient manufacture can be used for the anti-leakage device of a gap type labyrinth oil sealing device used for other types of rotary machines.
Description
(1), technical field
The utility model relates to diesel engine rear end (power take-off) oil sealer.
(2), technical background
Diesel engine connects output power by the crankshaft rear end output flange of high speed rotating with flywheel.For one of method of preventing oil seepage in the crankcase is to be processed with spiral oil sealing groove on the output flange cylindrical of rear end, and is fixedly installed in the flywheel casing on the body and constitutes chink type labyrinth oil sealer between the circle.Owing between the circle relative movement gap is arranged in output flange cylindrical and the flywheel casing, so after diesel engine turns round the long period, under certain crankcase pressure, leakage problems still is difficult to solve, this not only makes Oil Consumption increase, and when machine oil after the oil sealer outflow, especially to dry type actuating unit (as dry clutch etc.) user, not only can influence the diesel engine operating reliability, also can bring pollution to environment.
(3), summary of the invention
The utility model adopts at diesel engine output flange and flywheel casing fitting surface, go up processing one groove near circle in the flywheel casing of the spiral oil sealing groove tail end on the output flange cylindrical, by pipeline this groove and diesel engine intake pipe are linked up, when utilizing the naturally aspirated Diesel intake stroke in groove, to produce the rotation of negative pressure (degree of vacuum) and flywheel and the effect of the difference of the negative pressure (degree of vacuum) that produces between the flywheel casing end face, reach and prevent the purpose of machine oil through the outside seepage of rear end oil sealer.
The utility model is achieved in that a kind of diesel engine Rear oil seal negative pressure leakage proof device, comprise output flange, flywheel casing and be positioned at spiral oil sealing groove on the output flange cylindrical, circle is gone up processing one annular ditch groove in the corresponding flywheel casing at spiral oil sealing groove tail end position, the sucking pipe that runs through flywheel casing, one end and suction tude connect, and an end and groove connect.
In above-mentioned diesel engine Rear oil seal negative pressure leakage proof device, the sectional shape of described groove is rectangle or other shape.
(4), description of drawings
Fig. 1 is a diesel engine Rear oil seal negative pressure leakage proof schematic representation of apparatus.
Among the figure, 1 is suction tude, and 2 is sucking pipe, and 3 is body, and 4 is flywheel casing, and 5 is flywheel, 6 is disc, and 7 is output flange, and 8 is spiral oil sealing groove, and 9 is bent axle, and 10 is negative cavity, and 11 is groove, 12 is main bearing, and 13 is oil-return groove, and 14 is sounding pipe, and 15 is spill port, and 16 is oil sump.
(5), preferred forms
Preferred forms of the present utility model is provided by following accompanying drawing.
Referring to shown in Figure 1, crankshaft of diesel engine 9 is installed on the diesel-engine body 3 by main bearing 12, and bent axle 9 combines as a whole with rear end output flange 7 and flywheel 5 threes, outputs power by the bent axle 9 that runs up.Output flange 7 cylindricals and be fixedly installed in the flywheel casing 4 on the body 3 and be Spielpassung between the circle, circle is at the corresponding site place that is positioned at the spiral oil sealing groove 8 tail end positions on output flange 7 cylindricals in the flywheel casing 4, process an annular ditch groove 11, the sucking pipe 2 that runs through flywheel casing 4, one end and diesel engine intake pipe 1 connect, and an end and groove 11 connect.During the diesel engine running, machine oil is under the centrifugal action that is installed on the disc 6 on the output flange 7, most of machine oil is got rid of to the edge, and after flowing into spill port 15, the oil-return groove 13 of below returns oil sump 16, because crankcase has certain pressure, so still have small amount of engine oil to leak out to groove 11 from spiral oil sealing groove 8, and the getter action of naturally aspirated Diesel intake stroke, can make generation small negative pressure (degree of vacuum) in the groove 11 by sucking pipe 2, when this negative pressure greater than the flywheel 5 of high speed rotating and when being fixedly installed in the negative pressure (degree of vacuum) of the negative cavity 10 that constitutes between the both ends of the surface of the flywheel casing 4 on the body 3, promptly can prevent the outside seepage of machine oil in the groove 11.Seepage machine oil sucks diesel engine intake pipe 1 by sucking pipe 2.Output flange 7 outside diameters are 225 millimeters of Φ, matching gap between flywheel casing 4 and the output flange 7 is 0.43 millimeter, rectangle groove 11 is of a size of (Φ 236 * Φ 225 * 7) millimeter, its sectional area is 38 square millimeters, sucking pipe 2 is 8 * 1 millimeters copper pipes of Φ, the degree of vacuum of negative cavity 10 rises with diesel engine speed and increases, and when the rotating speed of bent axle 9 was 2200 rev/mins, the degree of vacuum of negative cavity 10 was 3 column.Evidence, degree of vacuum just can not produce the engine oil leakage phenomenon greater than 3 column in groove 11.The sounding pipe of installing below flywheel casing 4 14 can be measured recirculating oil quantity.This apparatus structure is simple, and is easily manufactured, and effect is remarkable, also can be used for the leakage proof device of the used chink type of the rotating machinery labyrinth oil sealer of other type.
Claims (2)
1, a kind of diesel engine Rear oil seal negative pressure leakage proof device, comprise output flange (7), flywheel casing (4) and be positioned at spiral oil sealing groove (8) on output flange (7) cylindrical, the interior circle of corresponding flywheel casing (4) that it is characterized in that spiral oil sealing groove (8) tail end position is gone up processing one annular ditch groove (11), the sucking pipe (2) that runs through flywheel casing (4), one end and suction tude (1) connect, and an end and groove (11) connect.
2, diesel engine Rear oil seal negative pressure leakage proof device according to claim 1, the sectional shape that it is characterized in that groove (11) is a rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216800 CN2591233Y (en) | 2002-04-15 | 2002-04-15 | Diesel engine rear oil-sealing negative pressure anti-leaking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216800 CN2591233Y (en) | 2002-04-15 | 2002-04-15 | Diesel engine rear oil-sealing negative pressure anti-leaking apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591233Y true CN2591233Y (en) | 2003-12-10 |
Family
ID=33695735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02216800 Expired - Lifetime CN2591233Y (en) | 2002-04-15 | 2002-04-15 | Diesel engine rear oil-sealing negative pressure anti-leaking apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591233Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748158A (en) * | 2012-07-17 | 2012-10-24 | 无锡动力工程股份有限公司 | Centrifugal sealing structure of crankshaft of diesel engine |
-
2002
- 2002-04-15 CN CN 02216800 patent/CN2591233Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748158A (en) * | 2012-07-17 | 2012-10-24 | 无锡动力工程股份有限公司 | Centrifugal sealing structure of crankshaft of diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120415 Granted publication date: 20031210 |