CN202832845U - Diesel engine back oil seal - Google Patents

Diesel engine back oil seal Download PDF

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Publication number
CN202832845U
CN202832845U CN 201220477843 CN201220477843U CN202832845U CN 202832845 U CN202832845 U CN 202832845U CN 201220477843 CN201220477843 CN 201220477843 CN 201220477843 U CN201220477843 U CN 201220477843U CN 202832845 U CN202832845 U CN 202832845U
Authority
CN
China
Prior art keywords
seal
diesel engine
sealing cover
sealed cap
oil seal
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
Application number
CN 201220477843
Other languages
Chinese (zh)
Inventor
韦莹
张红学
胥兵
张伟华
林远鹏
贺梅宝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Zhongche Yuchai engine Limited by Share Ltd
Original Assignee
YCSR SICHUAN ENGINE CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by YCSR SICHUAN ENGINE CO Ltd filed Critical YCSR SICHUAN ENGINE CO Ltd
Priority to CN 201220477843 priority Critical patent/CN202832845U/en
Application granted granted Critical
Publication of CN202832845U publication Critical patent/CN202832845U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a diesel engine back oil seal which comprises a labyrinth type seal structure which is composed of a static seal and a motive seal. The static seal comprises an upper sealed cap, a lower sealed cap, a sealed cap gasket and a sealing gasket, wherein the sealed cap gasket is arranged between the junction surfaces of the upper sealed cap and the lower sealed cap, the sealing gasket is arranged between the junction surfaces of the upper sealed cap and the lower sealed cap and the output end face of an engine body, the motive seal comprises a rectangular rubber sealing ring, and the center of the rectangular rubber sealing ring and the center of a annulus groove of the upper sealed cap and the lower sealed cap are at the same straight. The diesel engine back oil seal adopts labyrinth type seal structure of the static seal to stop oil leakage of lubrication diesel engine shafting, and the motive seal can well stop the leakage of remained small amount of oil to completely achieve seal effect of the diesel engine back oil seal. The diesel engine back oil seal has the advantages of being simple and compact in structure, reliable in sealing, low in manufacturing cost, good in endurance quality and capable of still keeping the good endurance quality after being used for a long time.

Description

Rear oil seal of diesel engine
Technical field
The utility model relates to a kind of Rear oil seal, is applicable to the diesel engine with the shaft coupling that cools off, lubricates, and relates in particular to a kind of Rear oil seal for medium-speed high-power diesel engine, belongs to diesel engine seal arrangement technical field.
Background technique
For the engine oil leakage that prevents splash machine oil and lubricated Diesel Shafting in the crankcase outside diesel engine, be provided with the Rear oil seal device at the diesel engine output terminal.At present, the domestic mazy type machinery static seal arrangement that generally adopts.Though this seal arrangement can play certain seal action, in diesel engine work, because engine oil pressure is large, through behind the certain hour still organic oil exosmose and leak phenomenon and occur, sealing is not exclusively reliable, has increased the Maintenance and Repair probability, so that workload and cost increase.
The model utility content
The purpose of this utility model is: the mazy type Rear oil seal that provides a kind of static and dynamic sealing to combine, purpose are the problems that solves the leakage of oil of common medium-speed high-power diesel engine output terminal, thereby can effectively solve above-mentioned problems of the prior art.
The purpose of this utility model is to realize by following technical proposals: a kind of rear oil seal of diesel engine, comprise the labyrinth seal structure that static seal and motive sealing form, described static seal comprises top cover labyrinth, lower sealing cover, sealing cover pad and gasket seal, described sealing cover pad is located between the junction plane of top cover labyrinth and lower sealing cover, described gasket seal is located between the junction plane of top cover labyrinth and lower sealing cover and body output end face, described motive sealing comprises rubber rectangular ring, being centered close on the same straight line of the center of rubber rectangular ring and top cover labyrinth and lower sealing cover annular groove.
As a kind of optimal way, described labyrinth seal structure is to be provided with several layers of annular groove that is arranged in order, possess gap and expansion cavity between the adjacent layer, have the winding type oil back chamber at second and the 3rd channel bottom, near the channel bottom of body output end face be provided be connected with oil back chamber through hole.
As further preferred, described through hole is three, and is obliquely installed.
As further preferred, described rubber rectangular ring be positioned at that outer field groove arranges the center and its both sides and groove have the gap.
As further preferred, described rubber rectangular ring is sheathed on the axle journal of bent axle.
As optimal way, fix by taper pin between described top cover labyrinth, sealing cover pad and the lower sealing cover.
As optimal way, on lower sealing cover, also be provided with 2 taper pin-holes.
The labyrinth sealed implication: labyrinth sealing is to establish the belt sealing tooth that several are arranged in order around rotating shaft, form very little gap between tooth and the running shaft, form a series of gap and expansion cavitys of damming between tooth and the tooth, sealed medium is when the gap in the tortuous labyrinth that forms by many dam gap and expansion cavitys, through throttling repeatedly and produce very large energy loss, the sealed medium pressure head greatly descends, namely produce throttle effect, make it be difficult to seepage and reach the sealing purpose of Drain Resistance.
Owing to have the gap between the rotor of labyrinth seal and casing, contact without solid, therefore needn't lubricate, and allowed thermal expansion, the occasion that adapts to high temperature, high pressure, high speed-frequency, therefore, the sealing form is widely used in the rear sealing of axle head and the inter-stage of steam turbine, gas turbine, compressor, blower.
Compared with prior art, the beneficial effects of the utility model: the confined space that the utility model rear oil seal of diesel engine forms by static seal and diesel engine, stop the lubricating oil leakage diesel engine that splashes, adopt the labyrinth structure of static seal to play the effect that stops the lubricating oil leakage that lubricates Diesel Shafting, simultaneously, motive sealing can stop the seepage that remains a small amount of machine oil well, reaches the sealing effect of rear oil seal of diesel engine fully, therefore, the utility model is simple and compact for structure, sealing is reliable; Low cost of manufacture, and its excellent in durability still can keep good sealability after long-time the use.
Description of drawings
Fig. 1 is the structural representation of the utility model rear oil seal of diesel engine;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is the schematic representation of Fig. 1 when installing.
Among the figure, 1-top cover labyrinth, 2-lower sealing cover, 3-sealing cover pad, 4-gasket seal, 5-rubber rectangular ring, the 6-bent axle, 7-body output end face, 8-oil back chamber, the 9-taper pin-hole, 10-taper pin, 11-groove, the 12-static seal, 13-motive sealing, 14-through hole, 15-crankshaft end-face flange, 16-shaft coupling, 17-cooling and lubricating oil circuit.
Embodiment
Below in conjunction with specific embodiments and the drawings the utility model is further described.
Disclosed all features in this specification, or the step in disclosed all methods or the process, except the speciality and/or step of mutual repulsion, all can make up by any way, unless special narration all can be replaced by other equivalences or the alternative features with similar purpose, namely, unless special narration, an embodiment in a series of equivalences of each feature or the similar characteristics.
As shown in Figure 1 and Figure 2, the utility model rear oil seal of diesel engine comprises the labyrinth seal structure that static seal 12 and motive sealing 13 form, described labyrinth seal structure is to be provided with the several layers of annular groove that is arranged in order 11, possess gap and expansion cavity between the adjacent layer, have winding type oil back chamber 8 second and the 3rd groove 11 bottom, near groove 11 bottoms of body output end face 7 be provided be connected with oil back chamber 8 through hole 14; Described through hole 14 is three, and is obliquely installed.Described static seal 12 comprises top cover labyrinth 1, lower sealing cover 2, sealing cover pad 3 and gasket seal 4, described sealing cover pad 3 is located between the junction plane of top cover labyrinth 1 and lower sealing cover 2, be provided with 2 taper pin-holes 9 in lower sealing cover 2, and fixing by taper pin 10 between described top cover labyrinth 1, sealing cover pad 3 and the lower sealing cover 2.Described gasket seal 4 is located between the junction plane of top cover labyrinth 1 and lower sealing cover 2 and body output end face 7, described motive sealing 13 comprises rubber rectangular ring 5, being centered close on the same straight line of the center of rubber rectangular ring 5 and top cover labyrinth 1 and lower sealing cover 2 annular grooves; Described rubber rectangular ring 5 arranges with being positioned at 11 pairs of centers of outer field groove and its both sides and groove 11 have the gap.
During installation:
As shown in Figure 3, at first first rubber rectangular ring 5 is sheathed on the bent axle 6 output terminal axle journal relevant positions; The shaft coupling 16 of rubber rectangular ring 5 and bent axle 6 and possess up and down certain gap between the crankshaft end-face flange 15, the cooling and lubricating oil circuit 17 on the bent axle flow through sealing after this.The junction plane of upper and lower sealing cover has respectively two locating cones pin-and-holes, with two taper pins 10 upper and lower sealing cover and two sealing cover pads is connected the location; Six mounting holes are arranged, with bolt upper and lower sealing cover and two sealing cover pads 3 being clipped between both junction planes are connected and fixed; End face at the body output terminal is installed on the flanged surface of sealing cover, install in advance two locating taper pins, load onto gasket seal 4, two taper pin-holes 9 by lower sealing cover 2 are installed the sealing cover location and installation that connects on the flanged surface of sealing cover to the body output terminal, with bolt sealing cover and body are fastenedly connected again.Rubber rectangular ring 5 is not collided with groove 11 bi-side in the middle of groove 11 during installation, to avoid friction damage, and impact is used.
Workflow of the present utility model:
During diesel engine work, when machine oil entered the Rear oil seal position, the flinger ring that part machine oil is arranged on the crankshaft journal blocked, and flowed back in the crankcase; The machine oil that splashes is thrown on the upper and lower sealing cover internal surface by centrifugal force, and after sealed lid stopped, crankcase was got back in from top to bottom trickling; Part machine oil enters into expansion cavity and the throttle clearance of the mazy type annular oil groove composition of crankshaft output end axle journal and sealing cover from the gear oil neck gap of bent axle flinger ring and sealing cover, produce very large energy loss through throttling machine oil repeatedly, the pressure head of machine oil greatly descends, can't continue outward seepage, reach seal action.The machine oil that is blocked drops down in the groove, gets back in the crankcase by 3 through holes of channel bottom winding type oil back chamber of flowing through.This winding type oil back chamber degree of depth is more shallow, and the space that communicates with crankcase is larger, and well release pressure makes machine oil be easy to be back in the crankcase.Even there is part machine oil to stop by the rubber rectangular ring that the mazy type oil groove also can be installed in the ragged edge oil groove, thereby reached effective machine oil seal action.
To sum up, the Main Function of Rear oil seal sealing cover is dustproof and the machine oil that prevents from splashing flies out outside the diesel engine; The mazy type oil groove structure division of sealing cover makes the machine oil energy loss, reduces the machine oil pressure head, makes it be difficult to seepage, and its oil back chamber and through hole provide the approach that is back to crankcase to machine oil; Rubber rectangular ring and bent axle together rotate, and form the complicated little gap of mazy type with groove and greatly stop the machine oil of minute quantity, thereby make whole Rear oil seal structure realize the effective sealing effect.
This Rear oil seal structure forms simple, and cost is low, static seal part durable, and the work of dynamic sealing rubber circle is good, and is cheap, also can use the long period; Be association of activity and inertia and better reach sealing effect to machine oil.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims (7)

1. rear oil seal of diesel engine, it is characterized in that: comprise the labyrinth seal structure that static seal (12) and motive sealing (13) form, described static seal (12) comprises top cover labyrinth (1), lower sealing cover (2), sealing cover pad (3) and gasket seal (4), described sealing cover pad (3) is located between the junction plane of top cover labyrinth (1) and lower sealing cover (2), described gasket seal (4) is located between the junction plane of top cover labyrinth (1) and lower sealing cover (2) and body output end face (7), described motive sealing (13) comprises rubber rectangular ring (5), being centered close on the same straight line of the center of rubber rectangular ring (5) and top cover labyrinth (1) and lower sealing cover (2) annular groove.
2. rear oil seal of diesel engine as claimed in claim 1, it is characterized in that: described labyrinth seal structure is to be provided with several layers of annular groove that is arranged in order (11), have winding type oil back chamber (8) in second and the 3rd groove (11) bottom, near groove 11 bottoms of body output end face (7) be provided be connected with oil back chamber (8) through hole (14).
3. rear oil seal of diesel engine as claimed in claim 2, it is characterized in that: described through hole (14) is three, and is obliquely installed.
4. rear oil seal of diesel engine as claimed in claim 2 is characterized in that: described rubber rectangular ring (5) be positioned at that outer field groove (11) arranges the center and its both sides and groove (11) have the gap.
5. rear oil seal of diesel engine as claimed in claim 4, it is characterized in that: described rubber rectangular ring (5) is sheathed on the axle journal of bent axle (6).
6. rear oil seal of diesel engine as claimed in claim 1 is characterized in that: fixing by taper pin (10) between described top cover labyrinth (1), sealing cover pad (3) and the lower sealing cover (2).
7. rear oil seal of diesel engine as claimed in claim 1 is characterized in that: also be provided with 2 taper pin-holes (9) on lower sealing cover (2).
CN 201220477843 2012-09-19 2012-09-19 Diesel engine back oil seal Expired - Fee Related CN202832845U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220477843 CN202832845U (en) 2012-09-19 2012-09-19 Diesel engine back oil seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220477843 CN202832845U (en) 2012-09-19 2012-09-19 Diesel engine back oil seal

Publications (1)

Publication Number Publication Date
CN202832845U true CN202832845U (en) 2013-03-27

Family

ID=47944574

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220477843 Expired - Fee Related CN202832845U (en) 2012-09-19 2012-09-19 Diesel engine back oil seal

Country Status (1)

Country Link
CN (1) CN202832845U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106090222A (en) * 2016-06-23 2016-11-09 上海中船三井造船柴油机有限公司 A kind of dynamic seal structure of kinematic axis
CN109611235A (en) * 2019-01-17 2019-04-12 上海汽车集团股份有限公司 Engine rear end sealing device
CN109826720A (en) * 2018-04-19 2019-05-31 浙江吉利控股集团有限公司 Crankshaft oil seal device and automobile engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106090222A (en) * 2016-06-23 2016-11-09 上海中船三井造船柴油机有限公司 A kind of dynamic seal structure of kinematic axis
CN106090222B (en) * 2016-06-23 2017-09-19 上海中船三井造船柴油机有限公司 A kind of dynamic seal structure of kinematic axis
CN109826720A (en) * 2018-04-19 2019-05-31 浙江吉利控股集团有限公司 Crankshaft oil seal device and automobile engine
CN109826720B (en) * 2018-04-19 2020-07-21 浙江吉利控股集团有限公司 Crankshaft oil seal device and automobile engine
CN109611235A (en) * 2019-01-17 2019-04-12 上海汽车集团股份有限公司 Engine rear end sealing device

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 641301 Ziyang City, Sichuan province Yanjiang District No. 77 City Road four

Patentee after: Sichuan Zhongche Yuchai engine Limited by Share Ltd

Address before: 641301 Ziyang City, Sichuan province Yanjiang District No. 77 City Road four

Patentee before: YCSR Sichuan Engine Co.,Ltd.

CP01 Change in the name or title of a patent holder
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130327

Termination date: 20180919

CF01 Termination of patent right due to non-payment of annual fee