CN209621507U - A kind of conical surface check valve of injection pump fuel oil auxiliary oil inlet - Google Patents
A kind of conical surface check valve of injection pump fuel oil auxiliary oil inlet Download PDFInfo
- Publication number
- CN209621507U CN209621507U CN201920297695.2U CN201920297695U CN209621507U CN 209621507 U CN209621507 U CN 209621507U CN 201920297695 U CN201920297695 U CN 201920297695U CN 209621507 U CN209621507 U CN 209621507U
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- CN
- China
- Prior art keywords
- check valve
- conical surface
- fuel oil
- hole
- block
- 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 kind of conical surface check valves of injection pump fuel oil auxiliary oil inlet, are mainly made of carrier, valve seat, spool and block.Diversion trench and the first opening, the second opening, blind hole and through-hole form fuel gallery.Tapered portion has tapered surface, and mounting hole has taper platform.When fuel oil forward flow, tapered surface guidance fuel oil flows to and keeps check valve open state.When fuel oil reverse flow, flat face, which forms fuel oil, to be hindered, and fuel oil pushes spool is mobile to close check valve.Boss guarantees the maximum right side displacement of spool, keeps clear emergency exit, fuel flow is avoided to be obstructed.The conical surface one-way valve structures are simple, reliable performance.
Description
Technical field
The utility model relates to the component of diesel engine more particularly to a kind of conical surface lists of injection pump fuel oil auxiliary oil inlet
To valve.
Background technique
Since oil-control mode is different, Diesel Engine Mechanical formula single cylinder fuel injection pump has sufficiently large low pressure oil circulation passage, although
Low pressure oil is provided, without booster body, can equally meet requirement.Mechanically and electrically control multi-cylinder fuel injection pump generally has defeated
Low pressure oil can be increased to the high pressure of 0.2 or 0.4MPa to supply injection pump by oil pump.So these situations all do not need to assist into
Oily device.But in the case where no oil transfer pump, oil inlet time and oil inlet circulation road area are limited, it is necessary to it is auxiliary in addition to increase by one
Oil-inlet mechanism is helped, to guarantee that injection pump pump chamber full of fuel oil, makes diesel engine the operation is stable, meets the high injection pressure of diesel engine,
Discharge is reduced, is met environmental requirements.Existing auxiliary oil-inlet mechanism waits institutes referring to 201610391969.5,201821022080.0
It states.Existing valve arrangement be easy to produce leakage, opening and closing it is unsmooth, reliability is to be improved.
Utility model content
In order to solve the problems of the above-mentioned prior art, the utility model proposes a kind of injection pump fuel oils to assist oil inlet
Conical surface check valve.
The technical solution of the utility model is achieved in that
A kind of conical surface check valve of injection pump fuel oil auxiliary oil inlet, which is characterized in that mainly by carrier, valve seat, spool with
And block composition, the carrier have a blind hole, the side wall of the blind hole has the first opening, and the valve seat and block are installed in
In the blind hole, which has a mounting hole, and the side wall of the mounting hole has the second opening, and the block has multiple through-holes,
The spool includes tapered portion and sliding part, and the sliding part movably penetrates the mounting hole, and the tapered portion is from the peace
The outside for filling hole is stretched out, also, at least one axially disposed diversion trench of the sliding part, which is open with first,
Second opening, blind hole and through-hole form fuel gallery, wherein the tapered portion has tapered surface, and the mounting hole has taper
Platform, the tapered surface is at least part of to be pressed on the taper platform.
In the conical surface check valve of the utility model, the taper platform is located at the one of the close spool of the mounting hole
Diversion trench is truncated when being pressed in taper platform in side, the tapered surface.
In the conical surface check valve of the utility model, the side close to the block of the tapered portion has flat face,
The flat face is equipped with boss, and when which is pressed in the block, the through-hole is connected to diversion trench.
In the conical surface check valve of the utility model, the carrier is made of the end of thread and nut segment.
In the conical surface check valve of the utility model, the tapered portion is between block and valve body, the block and valve body
Distance be greater than tapered portion width and be less than spool width.
In the conical surface check valve of the utility model, the middle part of the block is equipped with centre bore, the middle part of the boss with
There is a gap between the centre bore.
In the conical surface check valve of the utility model, the tapered surface guides fuel oil to flow to through-hole from diversion trench, described flat
It faces directly and fuel oil is hindered to flow to diversion trench from through-hole.
A kind of diesel injection pump, it is unidirectional comprising the pump housing, inlet valve, solenoid valve, plunger assembly, outer sleeve and the conical surface
Valve, the pump housing and outer sleeve constitute low-pressure chamber, and the pump housing and plunger assembly constitute hyperbaric chamber, and conical surface check valve is located at plunger guide bush side
Wall, low-pressure chamber are connected to through the conical surface check valve with hyperbaric chamber.
The band conical surface check valve for implementing the utility model has the advantages that this injection pump fuel oil auxiliary oil inlet
Conical surface check valve be mounted on the channel of injection pump low pressure oil way, while high-pressure oil flow can be obstructed to low pressure oil channel, can root
According to needs, the position needed for injection pump is set.When fuel oil forward flow, tapered surface guidance fuel oil flows to and check valve is kept to open
State.When fuel oil reverse flow, flat face, which forms fuel oil, to be hindered, and fuel oil pushes spool is mobile to close check valve.Boss guarantees
The maximum right side displacement of spool, keeps clear emergency exit, fuel flow is avoided to be obstructed.The conical surface one-way valve structures are simple, reliable performance.
User is conducive to develop new host without being modified diesel low-voltage oil circuit.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the conical surface check valve of the utility model, main presentation off state；
Fig. 2 is the schematic diagram of another state of Fig. 1, and the direction of arrow is oil inlet flow direction in figure；
Fig. 3 is the schematic diagram of the another state of Fig. 1, and the direction of arrow is fuel-displaced flow direction in figure；
Fig. 4 is the view of the diesel injection pump of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
As shown in Figures 1 to 3, the conical surface check valve 70 of the utility model is mounted on the channel of injection pump low pressure oil way, together
When can obstruct high-pressure oil flow to low pressure oil channel, the position needed for injection pump can be set as needed.It is by carrier 10, valve seat
20, spool 30 and block 40 form.The part that carrier 10 can be screw, can be other individualisms, is also possible to electricity
Control oil jet pump body 61 itself.In the present embodiment, carrier 10 is made of thread segment 11 and nut segment 12.The thread segment of carrier 10
11 have a blind hole 13, and the side wall of the blind hole 13 has the first opening 14.Valve seat 20 and block 40 are installed in the blind hole 13.
Valve seat 20 is located inside blind hole 13, and block 40 is located at the outside of valve seat 20.Valve seat 20 has a mounting hole 21, the mounting hole 21
Side wall has the second opening 22.Second opening 22 is aligned with the first opening 14, and fuel oil can be through second opening 22 and the first opening
14 enter and leave mounting hole 21.Spool 30 includes tapered portion 31 and sliding part 32, generally t-shaped structure.Sliding part 32 is movably worn
Enter the mounting hole 21.Tapered portion 31 is stretched out from the outside of the mounting hole 21, and tapered portion 31 is located at close to the side of block 40.It is sliding
At least one axially disposed diversion trench 33 of dynamic portion 32, diversion trench 33 extend laterally to tapered surface 34 and the second opening 22.Gear
Block 40 is corresponding to have multiple through-holes 41.The diversion trench 33 and first the 14, second opening 22 of opening, blind hole 13 and 41 groups of through-hole
At fuel gallery 50.
Tapered portion 31 is between block 40 and valve body.When spool 30 moves in mounting hole 21, the two sides of tapered portion 31
It can be pressed on block 40 and mounting hole 21.Block 40 greater than the width of tapered portion 31 and is less than spool 30 at a distance from valve body
Width, when spool 30 is mobile, sliding part 32 is remained in mounting hole 21.Tapered portion 31 is generally conical, far from gear
The side of block 40 has tapered surface 34, has flat face 35 close to the side of the block 40.Mounting hole 21 has taper platform 23,
Diversion trench 33 is truncated when being pressed in taper platform 23 in tapered surface 34.Taper platform 23 is located at the side of the close spool 30 of mounting hole 21, cone
The radian of shape platform 23 is matched with tapered portion 31.Flat face 35 is equipped with boss 36, when boss 36 is pressed in block 40, through-hole 41 and water conservancy diversion
Slot 33 is connected to.Tapered surface 34 guides fuel oil to flow to through-hole 41 from diversion trench 33, and flat face 35 hinders fuel oil to lead from the flow direction of through-hole 41
Chute 33.When fuel oil forward flow, tapered surface 34 guides fuel oil to flow to and keep check valve open state.Fuel oil reverse flow
When, flat face 35, which forms fuel oil, to be hindered, and fuel oil pushes spool 30 is mobile to close check valve.Boss 36 guarantees that spool 30 is maximum right
Side displacement, keeps clear emergency exit, fuel flow is avoided to be obstructed.70 structure of conical surface check valve is simple, reliable performance.In addition, gear
The middle part of block 40 is equipped with centre bore 42, has a gap 43 between the middle part of boss 36 and the centre bore 42.Centre bore 42 expands
Channel 50 gross area improves flow velocity.
Diesel injection pump 60 as shown in Figure 4, comprising the pump housing 61, inlet valve 62, solenoid valve 63, plunger assembly 64, outer
Sleeve 65 and conical surface check valve 70.A low-pressure chamber 66, the pump housing 61 and plunger assembly 64 are formed between the pump housing 61 and outer sleeve 65
Constitute hyperbaric chamber 67.Inlet valve 62 respectively enters low-pressure chamber 66 and hyperbaric chamber 67 through 63 control channel of solenoid valve.Conical surface check valve
70 are located at 65 side wall of outer sleeve, and low-pressure chamber 66 can be connected to hyperbaric chamber 67 through the conical surface check valve 70.Referring to figs. 1 to 4, fuel oil pass through into
Enter low-pressure chamber 66 and hyperbaric chamber 67 after oil valve 62 under the control of solenoid valve 63.64 downlink hyperbaric chamber 67 of plunger assembly is formed very
Reciprocal of duty cycle, low-voltage fuel flow into hyperbaric chamber 67 from low-pressure chamber 66.When 64 uplink of plunger assembly, top fuel oil is compressed, and pushes valve
Core 30 moves right, and contacts until with valve seat 20.Low pressure oil and high-pressure oil passage quilt at this time, have been truncated hyperbaric chamber 67 and low-pressure chamber 66
Channel.The conical surface check valve 70 of the injection pump fuel oil auxiliary oil inlet of the utility model can adjust fuel oil oil inlet quantity as needed,
Make diesel engine the operation is stable, meet the high injection pressure of diesel engine.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, made any modification, equivalent replacement and improvement etc. should be included in the utility model
Protection scope within.
Claims (7)
1. a kind of conical surface check valve of injection pump fuel oil auxiliary oil inlet, which is characterized in that mainly by carrier, valve seat, spool and
Block composition, the carrier have a blind hole, and the side wall of the blind hole has the first opening, and the valve seat and block are installed in this
In blind hole, which has a mounting hole, and the side wall of the mounting hole has the second opening, and the block has multiple through-holes, institute
Stating spool includes tapered portion and sliding part, and the sliding part movably penetrates the mounting hole, and the tapered portion is from the installation
The outside in hole is stretched out, also, at least one axially disposed diversion trench of the sliding part, which is open with first, the
Two openings, blind hole and through-hole form fuel gallery, wherein and the tapered portion has tapered surface, and the mounting hole has taper platform,
The tapered surface is at least part of to be pressed on the taper platform.
2. conical surface check valve according to claim 1, which is characterized in that the taper platform is located at the close of the mounting hole
Diversion trench is truncated when being pressed in taper platform in the side of the spool, the tapered surface.
3. conical surface check valve according to claim 2, which is characterized in that the side close to the block of the tapered portion
With flat face, which is equipped with boss, and when which is pressed in the block, the through-hole is connected to diversion trench.
4. conical surface check valve according to claim 1, which is characterized in that the carrier is made of the end of thread and nut segment.
5. conical surface check valve according to claim 1, which is characterized in that the tapered portion between block and valve body,
The block is at a distance from valve body greater than the width of tapered portion and less than the width of spool.
6. conical surface check valve according to claim 3, which is characterized in that the middle part of the block is equipped with centre bore, described
There is a gap between the middle part of boss and the centre bore.
7. conical surface check valve according to claim 3, which is characterized in that the tapered surface guides fuel oil to flow to from diversion trench
Through-hole, the flat face hinder fuel oil to flow to diversion trench from through-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920297695.2U CN209621507U (en) | 2019-03-11 | 2019-03-11 | A kind of conical surface check valve of injection pump fuel oil auxiliary oil inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920297695.2U CN209621507U (en) | 2019-03-11 | 2019-03-11 | A kind of conical surface check valve of injection pump fuel oil auxiliary oil inlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209621507U true CN209621507U (en) | 2019-11-12 |
Family
ID=68456276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920297695.2U Expired - Fee Related CN209621507U (en) | 2019-03-11 | 2019-03-11 | A kind of conical surface check valve of injection pump fuel oil auxiliary oil inlet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209621507U (en) |
-
2019
- 2019-03-11 CN CN201920297695.2U patent/CN209621507U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 |