CN210830437U - Vibration-proof sealing device and sealing structure for oil drain hole - Google Patents
Vibration-proof sealing device and sealing structure for oil drain hole Download PDFInfo
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- CN210830437U CN210830437U CN201921197890.4U CN201921197890U CN210830437U CN 210830437 U CN210830437 U CN 210830437U CN 201921197890 U CN201921197890 U CN 201921197890U CN 210830437 U CN210830437 U CN 210830437U
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Abstract
The utility model relates to a vibration-proof sealing device and a sealing structure for an oil drain hole, the sealing device comprises a main sealing part and an auxiliary sealing part, the main sealing part comprises a screw plug and a combined sealing washer, the auxiliary sealing part comprises a plug, a sealing washer and a retainer ring, the sealing structure comprises an oil drain hole and the sealing device, the oil drain hole is arranged into a stepped hole structure with a small inner part and a large outer part, the small diameter hole is a threaded hole, the large diameter hole is a smooth hole, a plug body of the plug is in threaded connection with the threaded hole, the combined sealing washer is axially pressed on the annular end face at the junction of the unthreaded hole and the threaded hole by the plug head of the plug, the large-diameter part of the plug is in clearance fit with the unthreaded hole, radial sealing is formed between the sealing ring and the unthreaded hole, the retainer ring is sleeved at the junction of the large-diameter part and the small-diameter part of the plug, the outer edge of the plug is embedded into a retainer groove on the inner wall of the unthreaded hole, so that the plug is propped against the outer end face of the plug head. The utility model discloses sealed more reliability can adapt to vibration, the serious work occasion of dust, can avoid the oil drain hole oil leak.
Description
Technical Field
The utility model relates to a sealing device that oil drain hole was used and the seal structure that adopts this sealing device to form are particularly useful for the excavating equipment of often working in the abominable, serious occasion of dust in environment such as coal-winning machine.
Background
Coal reserves in China are abundant, and a coal mining machine is a main device for mining coal on a fully mechanized mining face. The rocker arm and the traction part of the coal mining machine realize corresponding functions through a gear transmission system. The coal mining machine is severe in working condition, coal ash and dust are serious, the coal mining machine needs to be discharged through the oil drain hole due to faults in a transmission system of the coal mining machine or the fact that gear oil in the gear cavity needs to be replaced regularly, and the oil drain hole is generally arranged at the bottom of the gear cavity machine body in order to be discharged completely. The oil drain hole of the coal mining machine is generally sealed by screwing a screw plug and a rubber gasket through threads, and oil can be conveniently drained by unscrewing the screw plug.
However, when the coal mining machine walks back and forth to cut coal, vibration is generated due to the fact that the walking system and the scraper pin row are in open type non-conjugate meshing transmission; meanwhile, when the roller of the coal mining machine cuts coal, high-frequency vibration can be generated due to the change of the coal quality of the coal bed, so that the working condition of the coal mining machine is severe and the vibration is frequent. Due to the vibration of the coal mining machine, the phenomenon that the screw plug is loosened and even falls off and is lost due to vibration can occur. Because the plug screw is installed in the fuselage bottom, the plug screw becomes flexible and can not in time be found, leads to the oil leak in the gear chamber, causes the gear wearing and tearing serious, takes place high temperature interlock phenomenon, and all gears are scrapped. In addition, the condition that some mine personnel are not overhauled in place exists, and the screw plug is screwed in but is not screwed down, so that the gear oil slowly leaks from the oil drain hole, or the overhaul is not paid attention to, the daily inspection is changed into monthly inspection or random overhaul, and hidden troubles are left for oil leakage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an antivibration type sealing device for oil drain hole has higher sealing reliability, can adapt to great vibration, the serious work occasion of dust, can avoid oil drain hole oil leak or oil impregnate basically.
The utility model discloses a main technical scheme has:
the utility model provides a vibration-proof type sealing device for oil drain hole, includes the sealed main seal portion of first layer and the sealed vice seal portion of second layer that is used as, main seal portion adopts the axial seal subassembly to the threaded form installation, vice seal portion adopts the radial seal subassembly to shaft hole cooperation mode installation, vice seal portion includes axial locating part, under the user state vice seal portion is located the outside of main seal portion, the two coaxial arrangement under the limiting displacement of axial locating part vice seal portion inwards pushes up on main seal portion.
The main sealing part comprises a screw plug and a combined sealing washer, the screw plug is of a stepped shaft structure, the large-diameter part is a screw plug head, the small-diameter part is a screw plug body, the screw plug body is provided with an external thread, the combined sealing washer is sleeved on the plug body, the auxiliary sealing part comprises a plug, a sealing ring and a retainer ring, the retainer ring is used as the axial limiting piece, the plug is of a stepped shaft structure, a sealing ring groove is arranged on the outer diameter of the large-diameter part of the plug, the sealing ring is arranged in the sealing ring groove, the retainer ring is sleeved on the outer diameter of the small-diameter part of the plug, the outer diameter of the retainer ring is larger than that of the large-diameter part of the plug head, the combined sealing washer is attached to the ring surface of the root part of the plug head in a use state, the check ring is attached to the ring surface of the root part of the large-diameter part of the plug, and the outer end part of the large-diameter part of the plug is propped against the outer end surface of the plug head.
The outer end face of the small-diameter part of the plug can be provided with an axially extending screw hole.
The utility model provides an anti-vibration type seal structure for oil drain hole, includes the sealed main seal portion of first layer and the sealed vice seal portion of second layer of serving, main seal portion adopts axial seal assembly to the thread form installation, vice seal portion adopts radial seal assembly to the installation of shaft hole cooperation mode, vice seal portion includes axial locating part, under the installation status, main seal portion and vice seal portion are installed in proper order to the oil drain hole from inside to outside, and the two is coaxial to be arranged under the limiting displacement of axial locating part vice seal portion inwards pushes up on main seal portion.
The main sealing part comprises a plug and a combined sealing washer, the plug is of a stepped shaft structure, a large-diameter part is a plug head, a small-diameter part is a plug body, external threads are arranged on the plug body, the combined sealing washer is sleeved on the plug body, an auxiliary sealing part comprises a plug, a sealing ring and a check ring, the check ring is used as an axial limiting part, the plug is of a stepped shaft structure, a sealing ring groove is formed in the outer diameter of the large-diameter part of the plug, the sealing ring is installed in the sealing ring groove, the check ring is sleeved on the outer diameter of the small-diameter part of the plug, the outer diameter of the check ring is larger than the outer diameter of the large-diameter part of the plug, an oil discharge hole is arranged to be a stepped hole structure with a small inner part and a large outer part, the small-diameter hole is a threaded hole, the large-diameter hole is a unthreaded hole, the plug body is in the threaded hole, the plug head is positioned in the unthreaded hole and compresses the combined sealing washer axially at On the annular end face, the combined sealing washer is attached to the root annular face of the plug screw head, the large-diameter portion of the plug is in clearance fit with the unthreaded hole, radial sealing is formed between the sealing ring and the unthreaded hole, a retainer ring groove is formed in the inner wall of the unthreaded hole, the retainer ring is embedded into the retainer ring groove, the retainer ring is attached to the root annular face of the large-diameter portion of the plug, and the outer end portion of the large-diameter portion of the plug is enabled to inwards abut against the outer end face of the plug screw head.
The surface of the plug is preferably subjected to blackening treatment, or the plug is made of stainless steel materials.
And lubricating grease is coated on the surfaces of the sealing ring and the plug.
The utility model has the advantages that:
to the not enough of traditional sealed design of oil drain hole, the utility model provides a antivibration type sealing device for oil drain hole is through adopting main seal portion and vice seal portion to constitute double seal, and each other is redundant design, is showing and has improved the sealed reliability of oil drain hole department, effectively prevents fluid from leaking from the oil drain hole.
The improvement of the reliability of the seal can be embodied in the following aspects:
firstly, withstand the plug screw through vice sealing, even the coal-winning machine during operation operating mode is abominable, the vibration is frequent, also can prevent effectively that the plug screw is not hard up, consequently avoided because the plug screw is not hard up and the oil leak.
Secondly, if the screw plug is not screwed tightly, the check ring of the auxiliary sealing part can not be installed, so that the sealing device can be installed and the installation condition can be automatically detected, and oil leakage caused by sealing failure due to manual overhaul failure or unqualified installation of the sealing device can be avoided.
And thirdly, due to the existence of the auxiliary sealing part, even if the main sealing part has sealing aging or failure oil leakage under special conditions, the auxiliary sealing part can play a sealing role, so that the sealing state of the oil drainage hole is maintained.
Fourthly because the existence of vice sealing, can effectively prevent the corruption, ageing, the corrosion etc. of the main seal of corrosive water and the dust of working face, not only can not lead to the plug screw to dismantle the difficulty because of the corrosion, can also reduce the frequency of overhauing, for example by daily inspection become monthly inspection, save maintenance time. Especially to some colliery geological conditions moisture serious and have under the water corrosion's the condition, the utility model discloses a sealing device's advantage is more obvious.
Fifthly, the blocking ring directly compresses the plug, so that the plug can be prevented from falling off, and the working position and the sealing performance of the auxiliary sealing part are ensured to a certain extent. And once the retaining ring is worn by the coal briquette, the plug falls off, and a new sealing device needs to be replaced even if no oil leakage exists, so that the effect of pre-detection warning can be achieved.
Drawings
Fig. 1 is a schematic structural view of a main seal portion of an embodiment of the vibration-proof seal device for an oil drain hole;
fig. 2 is a schematic structural view of a sub seal portion of an embodiment of the vibration-proof seal device for an oil drain hole;
fig. 3 is a schematic view showing an installation position relationship between a main seal portion and an auxiliary seal portion of an embodiment of the vibration-proof sealing device for an oil drain hole in a use state;
fig. 4 is a schematic structural view of an embodiment of the vibration-proof sealing structure for an oil drain hole.
Reference numerals:
1. a plug screw; 11. a screw plug head; 12. a plug body; 2. combining sealing gaskets; 3. a plug; 31. screw holes; 4. a seal ring; 5. a retainer ring; 6. an oil drain hole; 7. oil liquid; 8. coal briquettes.
Detailed Description
The utility model discloses a antivibration type sealing device for oil drain hole, including the sealed main seal portion of first layer and the sealed vice seal portion of second floor of being used as, main seal portion adopts axial seal assembly to the screw thread form installation, vice seal portion adopts radial seal assembly to the installation of shaft hole cooperation mode, vice seal portion includes axial locating part, under the user state vice seal portion is located the outside of main seal portion, the two coaxial arrangement under the limiting displacement of axial locating part vice seal portion inwards pushes up on main seal portion. The main sealing part and the auxiliary sealing part form double sealing, and are designed in a mutual redundancy way, so that oil leakage from the oil drain hole can be effectively prevented.
Fig. 1 to 3 show an embodiment of the vibration-proof sealing device for an oil drain hole. The main seal (see fig. 1) comprises a plug screw 1 and a combined sealing gasket 2. The screw plug is of a stepped shaft structure, the large-diameter part is a screw plug head 11, and the small-diameter part is a screw plug body 12. The screw plug body is provided with external threads, and the combined sealing washer is sleeved on the screw plug body. The main sealing part is used as a first layer of seal and is screwed into the oil drain hole in a thread form, and the combined sealing washer is axially compressed to form axial seal so as to prevent oil leakage. The secondary seal (see fig. 2) comprises a plug 3, a sealing ring 4 and a collar 5, which serves as the axial stop. The plug is of a stepped shaft structure, a sealing ring groove is formed in the outer diameter of the large-diameter portion of the plug, the sealing ring is installed in the sealing ring groove, the large-diameter portion of the plug is in clearance fit with the oil drain hole, radial sealing is formed between the plug and the oil drain hole through the sealing ring, and the sealing ring is used as a second layer of sealing and is also used for standby sealing. In case when the main seal portion became invalid, vice seal portion also can prevent that fluid from leaking and leading to gear chamber to lack oil and produce serious fault, and vice seal portion can also effectively prevent the corruption and the ageing of impurity such as external water and dust to main seal portion simultaneously, improves main seal portion's sealing reliability. The check ring is sleeved on the outer diameter of the small-diameter part of the plug, and the outer diameter of the check ring is larger than that of the large-diameter part of the plug. In a use state (see fig. 3), the outer edge of the retainer ring is embedded into the body provided with the oil drain hole, and the stopper is blocked by the retainer ring, so that the stopper can be prevented from falling off. At the moment, the combined sealing washer is pressed and attached to the root annular surface of the plug screw head, the retainer ring is pressed and attached to the root annular surface of the large-diameter part of the plug, the outer end part of the large-diameter part of the plug is abutted to the outer end surface of the plug screw head 11, and the auxiliary sealing part plays an axial limiting role in the main sealing part, so that the plug screw can be prevented from loosening due to vibration, and oil is prevented from leaking from the main sealing part.
The vibration-proof sealing device for the oil drain hole can be optimally designed at one or more of the following positions:
1) the sealing ring adopts O type circle, and convenient for material selection, the sealing ring groove is O type circle groove, simple structure.
2) The outer end face of the small-diameter part of the plug is provided with an axially extending screw hole 31, and after a common screw is screwed in, the plug can be conveniently detached.
3) The surface of the plug is subjected to blackening treatment, or the plug is made of stainless steel materials, so that the situation that the plug is difficult to disassemble due to long-time exposure and rusting can be prevented.
The utility model also discloses a antivibration type seal structure for oil drain hole has adopted the oil drain hole assembly structure behind the above-mentioned sealed package, including the sealed main seal portion of first layer and the sealed vice seal portion of second floor of using as, main seal portion adopts axial seal subassembly to the screw thread form installation, vice seal portion adopts radial seal subassembly to shaft hole cooperation mode installation, vice seal portion includes axial locating part, under the installation state, main seal portion and vice seal portion install the oil drain hole from inside to outside in proper order, the two coaxial arrangement under the limiting displacement of axial locating part vice seal portion inwards pushes up on main seal portion.
As shown in fig. 1-4, the main sealing portion includes a plug screw 1 and a combined sealing washer 2, the plug screw is of a stepped shaft structure, a large diameter portion is a plug screw head 11, a small diameter portion is a plug screw body 12, and an external thread is arranged on the plug screw body. The combined sealing washer is sleeved on the plug body. The auxiliary sealing part comprises a plug 3, a sealing ring 4 and a retaining ring 5, the retaining ring is used as the axial limiting part, the plug is of a stepped shaft structure, a sealing ring groove is formed in the outer diameter of the large-diameter part of the plug, the sealing ring is installed in the sealing ring groove, the retaining ring is sleeved on the outer diameter of the small-diameter part of the plug, and the outer diameter of the retaining ring is larger than that of the large-diameter part of the plug.
As shown in fig. 4, the oil drain hole 6 is configured as a stepped hole structure with a small inside and a large outside, the small diameter hole is a threaded hole, and the large diameter hole is a smooth hole. In the installation state, the screw plug body is in threaded connection with the threaded hole, the screw plug head is positioned in the unthreaded hole and axially compresses the combined sealing washer 2 on the annular end face of the junction of the unthreaded hole and the threaded hole, and the combined sealing washer is attached to the annular surface of the root of the screw plug head. The diameter of the unthreaded hole is slightly larger than that of the screw plug head. The large-diameter part of the plug 3 is in clearance fit with the unthreaded hole, and radial sealing is formed between the sealing ring 4 and the unthreaded hole. And a retainer ring groove is formed in the inner wall of the unthreaded hole, the outer edge of the retainer ring 5 is embedded into the retainer ring groove, and the retainer ring is attached to the ring surface of the root part of the large-diameter part of the plug so that the outer end part of the large-diameter part of the plug is inwards propped against the outer end surface of the plug head. The distance from the inner side wall of the retainer groove to the annular end face of the junction of the unthreaded hole and the threaded hole is equal to the sum of the axial thicknesses of the combined sealing washer, the plug screw head and the large-diameter part of the plug. The retaining ring is used for directly compressing tightly the end cap on the one hand, prevents that the end cap from droing, and on the other hand withstands the plug screw indirectly through the end cap, prevents that the plug screw from becoming flexible, avoids plug screw department fluid 7 to leak. Furthermore, due to the size matching of the main sealing part and the auxiliary sealing part, if the screw plug in the main sealing part is not screwed, the retainer ring of the auxiliary sealing part is not installed in the retainer ring groove, so that the oil leakage of the main sealing part due to the non-axial compression can be prevented.
The outer end face of the small-diameter part of the plug is preferably provided with an axially extending screw hole.
The surface of the plug is preferably subjected to blackening treatment, or the plug is made of stainless steel materials.
The surfaces of the sealing ring and the plug are preferably coated with grease.
When the combined sealing washer is installed, the combined sealing washer 2 is firstly sleeved on the screw plug, the screw plug is arranged in the oil drain hole, the screw plug 1 is screwed, the combined sealing washer is axially pressed on an annular interface between the threaded hole and the unthreaded hole by the screw plug head, then the sealing washer 4 is arranged in the sealing washer groove of the plug 3, lubricating grease is coated on the surfaces of the sealing washer and the plug, then the plug 3 with the sealing washer 4 is arranged, and finally the retainer ring 5 is arranged. If the retainer ring 5 cannot be installed in the screw plug 1, the screw plug is not completely screwed.
When oil is drained, the check ring 5 is firstly removed, then a screw is connected in a screw hole on the plug in a threaded mode, the plug is removed by pulling the screw outwards, and finally the plug screw 1 and the combined sealing washer 2 are removed.
The depth of the unthreaded hole is not less than the sum of the axial thicknesses of the combined sealing washer, the screw plug head and the plug, so that the coal briquette 8 cannot contact the plug and the retainer ring as much as possible.
The vibration-proof sealing structure for the oil drain hole is arranged at the bottom of an oil cavity machine body of equipment such as a coal mining machine, and facilitates thorough oil drainage in the cavity. In an extreme case, the secondary sealing part may be damaged by vibration or abrasion of the coal briquette 8 under the machine body, and the plug may fall off, and when the situation occurs, the sealing of the secondary sealing part fails, but the main sealing part is deep in the oil drain hole, so the coal briquette 8 cannot contact the main sealing part in general, and oil leakage of the main sealing part cannot be caused. Meanwhile, in the maintenance time of the working face, the loss of the auxiliary sealing part can be easily found through visual inspection, and once the loss of the auxiliary sealing part is found, a worker is reminded that a new anti-vibration sealing device for the oil drain hole needs to be replaced, so that the function of warning and preventing in advance is achieved. Therefore, under normal conditions, through this anti-vibration type sealing device for oil drain hole, oil drain hole department sealing performance improves by a wide margin, and the mining side personnel can examine this oil drain hole by the original day completely and change into monthly and examine, reduce the maintenance frequency, alleviate work load.
Claims (9)
1. The utility model provides an anti-vibration type sealing device for oil drain hole which characterized in that: including being used as the sealed main seal portion of first layer and the sealed vice seal portion of second layer, main seal portion adopts axial seal subassembly to the thread form installation, vice seal portion adopts radial seal subassembly to the installation of shaft hole cooperation mode, vice seal portion includes axial locating part, under the user state vice seal portion is located the outside of main seal portion, the two coaxial arrangement under the limiting displacement of axial locating part vice seal portion inwards pushes up on main seal portion.
2. The vibration-proof sealing device for the oil drain hole according to claim 1, wherein: the main sealing part comprises a screw plug and a combined sealing washer, the screw plug is of a stepped shaft structure, the large-diameter part is a screw plug head, the small-diameter part is a screw plug body, the screw plug body is provided with an external thread, the combined sealing washer is sleeved on the plug body, the auxiliary sealing part comprises a plug, a sealing ring and a retainer ring, the retainer ring is used as the axial limiting piece, the plug is of a stepped shaft structure, a sealing ring groove is arranged on the outer diameter of the large-diameter part of the plug, the sealing ring is arranged in the sealing ring groove, the retainer ring is sleeved on the outer diameter of the small-diameter part of the plug, the outer diameter of the retainer ring is larger than that of the large-diameter part of the plug head, the combined sealing washer is attached to the ring surface of the root part of the plug head in a use state, the check ring is attached to the ring surface of the root part of the large-diameter part of the plug, and the outer end part of the large-diameter part of the plug is propped against the outer end surface of the plug head.
3. The vibration-proof sealing device for the oil drain hole according to claim 2, wherein: the sealing ring adopts an O-shaped ring, and the sealing ring groove is an O-shaped ring groove.
4. The vibration-proof sealing device for the oil drain hole according to claim 2, wherein: and an axially extending screw hole is formed in the outer end face of the small-diameter part of the plug.
5. The vibration-proof sealing device for the oil drain hole according to claim 2, 3 or 4, wherein: the surface of the plug is subjected to blackening treatment, or the plug is made of stainless steel materials.
6. The utility model provides an anti-vibration type seal structure for oil drain hole which characterized in that: including being used as the sealed main seal portion of first layer and the sealed vice seal portion of second floor, main seal portion adopts axial seal subassembly, installs with the screw thread form, vice seal portion adopts radial seal subassembly, installs with shaft hole cooperation mode, vice seal portion includes axial locating part, under the installation condition, main seal portion and vice seal portion install the oil drain hole from inside to outside in proper order, and the two is coaxial to be arranged under the limiting displacement of axial locating part vice seal portion inwards pushes up on main seal portion, main seal portion includes plug screw and combination seal ring, the plug screw is stepped shaft structure, and major diameter part is the plug head, and minor diameter part is the plug body, is provided with the external screw thread on the plug body, the combination cover is on the plug body, vice seal portion includes end cap, sealing washer and retaining ring, the retaining ring is used as axial locating part, the plug is of a stepped shaft structure, a sealing ring groove is arranged on the outer diameter of the large-diameter part of the plug, the sealing ring is arranged in the sealing ring groove, the retainer ring is sleeved on the outer diameter of the small-diameter part of the plug, the outer diameter of the retainer ring is larger than the outer diameter of the large-diameter part of the plug, the oil drain hole is of a stepped hole structure with a small inner part and a large outer part, the small-diameter hole is a threaded hole, the large-diameter hole is a unthreaded hole, the plug body is in threaded connection in the threaded hole in an installation state, the plug head is positioned in the unthreaded hole and axially compresses the combined sealing washer on an annular end face at the junction of the unthreaded hole and the threaded hole, the combined sealing washer is attached to the root annular face of the plug head, the large-diameter part of the plug is in clearance fit with the unthreaded hole, radial sealing is formed between the sealing ring and the unthreaded hole, and the inner, the check ring is embedded into the check ring groove and is attached to the ring surface of the root part of the large-diameter part of the plug, so that the outer end part of the large-diameter part of the plug is inwards propped against the outer end surface of the plug head.
7. The vibration-proof seal structure for an oil drain hole according to claim 6, wherein: and an axially extending screw hole is formed in the outer end face of the small-diameter part of the plug.
8. The vibration-proof seal structure for an oil drain hole according to claim 6, wherein: the surface of the plug is subjected to blackening treatment, or the plug is made of stainless steel materials.
9. The vibration-proof seal structure for an oil drain hole according to claim 6, wherein: and lubricating grease is coated on the surfaces of the sealing ring and the plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921197890.4U CN210830437U (en) | 2019-07-29 | 2019-07-29 | Vibration-proof sealing device and sealing structure for oil drain hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921197890.4U CN210830437U (en) | 2019-07-29 | 2019-07-29 | Vibration-proof sealing device and sealing structure for oil drain hole |
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| CN210830437U true CN210830437U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296216A (en) * | 2019-07-29 | 2019-10-01 | 天地科技股份有限公司上海分公司 | Drain oil anti-vibration sealing device and sealing structure |
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2019
- 2019-07-29 CN CN201921197890.4U patent/CN210830437U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296216A (en) * | 2019-07-29 | 2019-10-01 | 天地科技股份有限公司上海分公司 | Drain oil anti-vibration sealing device and sealing structure |
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