CN205955982U - String seal structure is prevented to diesel engine petroleum pump assembly machine diesel oil - Google Patents
String seal structure is prevented to diesel engine petroleum pump assembly machine diesel oil Download PDFInfo
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- CN205955982U CN205955982U CN201620859528.9U CN201620859528U CN205955982U CN 205955982 U CN205955982 U CN 205955982U CN 201620859528 U CN201620859528 U CN 201620859528U CN 205955982 U CN205955982 U CN 205955982U
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Abstract
The utility model discloses a string seal structure is prevented to diesel engine petroleum pump assembly machine diesel oil aims at providing one kind and seals reliably, can avoid petroleum pump machine oil to scurry the seal structure that moves of diesel oil trouble. The utility model discloses a following technical scheme realizes: in the seal structure subassembly, adopt interference fit connect firmly on defeated oil pump body for quiet ring (6), but clearance fit in be of the epaxial endwise slip of petroleum pump driving gear movable sealing ring (8), the O type circle (7) that sets up in quiet ring annular forms the physics obstacle that seals with pump body pore wall, rotating ring O type circle (10) becomes sealed physics obstacle with movable sealing ring (8) and drive gear (5) axiform, prevents the leakage in machine oil subshaft crack, gu it is epaxial that fixed ring (12) adopt interference fit to connect firmly at drive gear, spline round pin (11) take movable sealing ring rotatory, and pressure spring (9) promote movable sealing ring and paste tight quiet ring all the time, form one deck 0.3 during the rotation 2.5 the pressure oil film of micron, this layer of oil film have constituted the together sealed protective screen in end in machine oil, diesel oil chamber.
Description
Technical field
This utility model is related to a kind of oil transmitting pump of diesel engine assembly, provides one kind can reliably solve oil transfer pump work process
The movable sealing structure of middle machine oil string diesel oil.
Background technology
Diesel engine oil pump assembly is the key component of diesel fuel system, and it utilizes the rotation driving oil of camshaft
Pump pressure oil piston, low-voltage fuel is risen to high pressure, is then sprayed into diesel engine in-cylinder combustion, in the process, in oil pump assy
Main motion parts include camshaft, tappet assembly, bearing shell, bearing etc., will bear very big mechanical load, so having to
There is reliable lubrication, and require to walk the heat of generation during operation by the fluxion strap of lubricating fluid, for reaching this purpose, oil pump
Assembly domestic demand has the cavity of a receiving machine oil, and intracavity machine oil can keep certain pressure.And the drive installation of oil transfer pump exists
On camshaft, can there is a separating surface in the diesel oil of oil transfer pump intracavity and machine oil, separating surface must have a sealing structure to protect
Card machine oil and the isolation of diesel oil.Because camshaft speed is not high, the linear velocity at axle journal circumference is not more than 3 meter per seconds, so at present
The sealing means commonly used both at home and abroad are framework lip-shaped sealing ring, and which structure is simple, sealing low cost.Its principle such as Fig. 4, work
It is that the major and minor lip (d, e) of framework lip-shaped sealing ring (b) holds drive shaft (a) tightly prevents lubricating oil leakage, outside lip packing as mode
Circle is with Interference size indentation sealing circle mounting seat (c).But in the course of the work because the two ends being isolated medium are respectively negative pressure
With malleation, as shown in figure 1, when negative pressuren zone pressure produce pulsation when, the conduction of pressure wave can lead to the deformation of lip-type packing,
Thus forming a machine oil, diesel oil leakage path, then machine oil, diesel oil are altered oily fault and just be there occurs.In production practices process
In, fault is often sent out, and does not have good solution.
Content of the invention
The purpose of this utility model is often to occur machine oil, diesel oil to alter oily phenomenon problem for above-mentioned prior art, provides
A kind of sealed reliable, it can be avoided that the movable sealing structure of diesel oil fault altered by machine oil in oil transfer pump work process.
For this reason, this utility model provides a kind of anti-string sealing structure of oil transmitting pump of diesel engine assembly machine diesel oil, including：Move and be associated in
Driving gear shaft 5 on fuel supply pump housing 1 and be arranged on sealing structural component 13 on gear cavity negative pressuren zone 18 it is characterised in that
In sealing structural component 13, the stationary ring 6 that connected firmly on fuel supply pump housing 1 using interference fit, gap cooperation is in oil transfer pump actively
Axially slidable rotary packing ring 8 on gear shaft, the O-ring 7 being arranged in stationary ring 6 annular groove and pump housing hole wall form the thing of sealing
Reason obstacle；Rotating ring O-ring 10 forms the physics obstacle of sealing with rotary packing ring 8 and driving gear 5 axle, prevents machine oil from axial play
Leakage；Retainer ring 12 connects firmly on driving gear 5 axle using interference fit, and rotation stop pin 11 band rotary packing ring 8 rotates, holddown spring
9 promotion rotary packing rings 8 are adjacent to stationary ring 6 all the time, form the pressure film of one layer of 0.3-2.5 micron during rotation, and this layer of oil film is constituted
Machine oil, last one sealing barrier in diesel oil chamber.
This utility model has following beneficial effect with respect to existing scheme：
Sealed reliable.This utility model employs O-ring static seal in the two of which with diesel oil leakage path for the machine oil,
Reliability is very high, the end face seal structure that a remaining passage is energized using spring pressure, and the DLC coating of sealing surface can ensure
The minimized friction coefficient of rotation and rubbing surface life-span the longest.
This utility model connects firmly stationary ring 6 on fuel supply pump housing 1 using interference fit it is therefore prevented that the rotation of stationary ring, and stationary ring is O-shaped
Circle 7 forms the physics obstacle of sealing with pump housing hole wall, prevents the leakage from hole wall for the machine oil；And driven close by rotation stop rotation stop pin 11
Seal ring 8 rotates, and holddown spring 9 ensures that rotary packing ring 8 is adjacent to stationary ring 6, rotating ring O-ring 10 and rotary packing ring 8 and sliding tooth all the time
Taking turns the physics obstacle that 5 axles form sealing, preventing the leakage from axial play for the machine oil, thus avoid machine oil in oil transfer pump work process altering
The generation of diesel oil fault.
This utility model relies on spring pressure to energize to keep the sealing surface pressure of fixation, and the DLC coating of sealing surface can be protected
The minimized friction coefficient of card rotation and rubbing surface life-span the longest.
Brief description
Further illustrate this utility model with example below in conjunction with the accompanying drawings.
Fig. 1 is the perspective view of this utility model oil transmitting pump of diesel engine assembly.
Fig. 2 is the A-A of Fig. 1 to sectional view.
Fig. 3 is the close-up schematic view of Fig. 1 oil transmitting pump of diesel engine assembly machine diesel oil anti-string sealing structure.
Fig. 4 is domestic at present conventional framework lip-shaped sealing ring sealing means close-up schematic view.
In figure：1 fuel supply pump housing, 2 covers of feed pump, 3 connecting bolts, 4 driven gears, 5 oil transfer pump driving gear shafts, 6 stationary rings,
7O type circle, 8 rotary packing rings, 9 holddown springs, 10 rotating ring O-ring, 11 rotation stop pins, 12 retainer ring, 13 sealing structural components, 14 enter
Hydraulic fluid port, 15 oil-outs, 16 higher-pressure regions, 17DLC coating, 18 driving gears.
Specific embodiment
Refering to Fig. 1-Fig. 3.A kind of anti-string sealing structure of oil transmitting pump of diesel engine assembly machine diesel oil, including：Move and be associated in oil transfer pump
Driving gear shaft 5 on body 1 and be arranged on the sealing structural component 13 on gear cavity negative pressuren zone 18.In sealing structural component 13
In, rotary packing ring 8 is axially connected using the stationary ring 6 that interference fit connects firmly on fuel supply pump housing 1, is arranged on the O in stationary ring 6 annular groove
Type circle 7 forms the physics obstacle of sealing with pump housing hole wall.
The hole wall of rotary packing ring 8 forms, with the O-ring 10 in the closure gasket groove of oil transfer pump driving gear shaft 5, the physics sealing
Obstacle, by the axle journal passage isolation of machine oil and diesel oil leakage.
Retainer ring 12 connects firmly in gear shaft 5 using interference fit, and rotation stop pin 11 is fixed on the circumference of rotary packing ring 8
On；Retainer ring 12 drives rotation stop pin 11 band rotary packing ring 8 to rotate, and holddown spring 9 promotes rotary packing ring 8 to be adjacent to stationary ring 6 all the time, quiet
The contact surface of ring has very high flatness, and stationary ring 6 surface adopts DLC coating 17, therefore has the coefficient of friction of very little and very high
Reliable life, when driving oil transfer pump driving gear shaft 5 to rotate, DLC coating 17 surface forms the pressure of one layer of 0.3-2.5 micron
Oil film, this layer of oil film constitutes last one sealing barrier in machine oil, diesel oil chamber.So, employ mechanical end face seal machine,
The anti-string structure of diesel oil ensures that the end cover of this structure can be reliably completed sealing function.
Retainer ring 12 is connected firmly on driving gear shaft 5 using interference fit, drives sealing ring 8 to revolve by rotation stop rotation stop pin 11
Turn, holddown spring 9 ensures that rotary packing ring 8 is adjacent to stationary ring 6, rotating ring O-ring 10 and rotary packing ring 8 and driving gear 5 axle shape all the time
Become the physics obstacle of sealing, prevent the leakage from axial play for the machine oil.
Claims (7)
1. the anti-string sealing structure of a kind of oil transmitting pump of diesel engine assembly machine diesel oil, including：Connect firmly the driving tooth on fuel supply pump housing (1)
Wheel shaft (5) and the sealing structural component (13) that is arranged on gear cavity negative pressuren zone driving gear (18) are it is characterised in that in sealing
In construction package (13), the stationary ring (6) that connected firmly on fuel supply pump housing (1) using interference fit, gap cooperation is in oil transfer pump actively
Axially slidable rotary packing ring (8) on gear shaft, O-ring (7) and the pump housing hole wall being arranged in stationary ring (6) annular groove forms close
The physics obstacle of envelope；Rotating ring O-ring (10) forms the physics obstacle of sealing with rotary packing ring (8) and driving gear (5) axle, prevents
Machine oil is from the leakage of axial play；Retainer ring (12) connects firmly on driving gear (5) axle using interference fit, and rotation stop pin (11) drives close
Seal ring (8) rotates, and holddown spring (9) promotes rotary packing ring (8) to be adjacent to stationary ring (6) all the time, forms one layer of 0.3-2.5 micro- during rotation
The pressure film of rice, this layer of oil film constitutes last one sealing barrier in machine oil, diesel oil chamber.
2. oil transmitting pump of diesel engine assembly machine diesel oil as claimed in claim 1 anti-string sealing structure it is characterised in that：Stationary ring (6)
Surface adopts DLC coating (17).
3. oil transmitting pump of diesel engine assembly machine diesel oil as claimed in claim 1 anti-string sealing structure it is characterised in that：Retainer ring
(12) connected firmly on driving gear shaft (5) using interference fit.
4. oil transmitting pump of diesel engine assembly machine diesel oil as claimed in claim 1 anti-string sealing structure it is characterised in that：Drive oil transportation
When pump driving gear shaft (5) rotates, DLC coating 17 surface forms the pressure film of one layer of 0.3-2.5 micron.
5. oil transmitting pump of diesel engine assembly machine diesel oil as claimed in claim 1 anti-string sealing structure it is characterised in that：Retainer ring
(12) connected firmly on driving gear shaft (5) using interference fit.
6. oil transmitting pump of diesel engine assembly machine diesel oil as claimed in claim 1 anti-string sealing structure it is characterised in that：Rotation stop pin
(11) it is fixed on the circumference of rotary packing ring (8).
7. oil transmitting pump of diesel engine assembly machine diesel oil as claimed in claim 1 anti-string sealing structure it is characterised in that：Retainer ring
(12) drive rotation stop pin (11) band rotary packing ring (8) rotation, holddown spring (9) promotes rotary packing ring (8) to be adjacent to stationary ring all the time
(6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620859528.9U CN205955982U (en) | 2016-08-09 | 2016-08-09 | String seal structure is prevented to diesel engine petroleum pump assembly machine diesel oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620859528.9U CN205955982U (en) | 2016-08-09 | 2016-08-09 | String seal structure is prevented to diesel engine petroleum pump assembly machine diesel oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205955982U true CN205955982U (en) | 2017-02-15 |
Family
ID=57976009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620859528.9U Active CN205955982U (en) | 2016-08-09 | 2016-08-09 | String seal structure is prevented to diesel engine petroleum pump assembly machine diesel oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205955982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360041A (en) * | 2019-08-08 | 2019-10-22 | 思达耐精密机电（常熟）有限公司 | A kind of novel fuel pump for preventing oil sealing from leaking and detecting oil seal failure |
-
2016
- 2016-08-09 CN CN201620859528.9U patent/CN205955982U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360041A (en) * | 2019-08-08 | 2019-10-22 | 思达耐精密机电（常熟）有限公司 | A kind of novel fuel pump for preventing oil sealing from leaking and detecting oil seal failure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |