CN207762332U - A kind of gerotor type air bleeding valve - Google Patents
A kind of gerotor type air bleeding valve Download PDFInfo
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- CN207762332U CN207762332U CN201721890137.4U CN201721890137U CN207762332U CN 207762332 U CN207762332 U CN 207762332U CN 201721890137 U CN201721890137 U CN 201721890137U CN 207762332 U CN207762332 U CN 207762332U
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- valve
- oil
- inner cavity
- air bleeding
- cylinder
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Abstract
A kind of gerotor type air bleeding valve, including valve rod, valve casing, valve seat, resetting spring and driving execution unit；Wherein, valve seat is equipped with the cylinder channel that top is valve seat orifice, valve casing is fixedly connected on valve seat, valve rod is equipped with stem head through in the inner cavity of valve casing and valve seat and lower part, the surface of the stem head and the medial surface of valve seat orifice form sealed cooperation, resetting spring is connect with valve rod and the ejection valve rod is upward, driving execution unit is connect with high pressure servo oil pipe, it is fixedly connected on the top of valve casing and is compressed on valve rod, which is moved up and down using the control of high pressure servo oil and driving stem to open and close air bleeding valve.The utility model realizes valve rod in the buffering for opening and closing latter stage, effectively reduces the hard collision between component, improves exhaust and scavenging efficiency, has the advantages that simple in structure, handling ease, at low cost, long lifespan, shock are small.
Description
Technical field
The utility model is related to a kind of air bleeding valves, and in particular to a kind of Marine High-power Diesel Engine gerotor type air bleeding valve,
Belong to Diesel Engine Technique Field.
Background technology
The air bleeding valve and its control drive system of marine low speed diesel engine are one of core components of diesel engine, and driving is special
Property will directly influence the economy and emission performance of engine.Widely used air bleeding valve belongs to normally closed type currently on the market, i.e.,：
The contact surface of valve rod and valve seat therein is located at the top of valve disc, and when diesel oil is burnt in cylinder, valve disc is taken a seat, and in cylinder
It is pressed on valve seat under the compressing of interior pressure.When air bleeding valve needs to open, high pressure servo oil driving exhasut valve stem moves downward,
Exhaust valve opening；When air bleeding valve needs to close, the pressure of servo oil reduces rapidly in booster cavity in air bleeding valve driving unit, arranges
Air valve stem moves upwards under the action of air spring, exhaust valve closure.The buffer gear point in existing normally closed type air bleeding valve
For two parts：Use air spring into row buffering when exhaust valve opening；It is buffered using damping piston when exhaust valve closure.Due to normal
Closed exhaust valve valve disc in in-cylinder combustion is pressed on valve seat and can not open upwards, therefore in order to avoid in-cylinder pressure is excessive
Lead to danger, it is necessary in addition configure safety valve, increase the complexity of structure；And the structure of damping spring and air spring is multiple
It is miscellaneous, difficulty of processing is big, and need to configure high pressure gas, therefore be easy to make valve rod travel that predetermined value be not achieved to even result in mistake
Effect, to seriously affect performance and the discharge of diesel engine.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of gerotor type air bleeding valve, are simplifying
While structure of uniting, exhaust and scavenging efficiency are improved, and extend system effectively to avoid hard collision using New Buffering structure
The service life of each composition parts achievees the effect that difficulty of processing and cost simple in structure, that reduce whole device.
To achieve the above object, the technical solution of the utility model is as follows：
A kind of gerotor type air bleeding valve is mounted in cylinder head, which is characterized in that the gerotor type air bleeding valve includes valve
Bar, valve casing, valve seat, resetting spring and driving execution unit；The valve seat is equipped with the cylinder channel being connected to cylinder, and the cylinder is logical
The top in road is valve seat orifice, and the valve casing is fixedly connected on the valve seat, and the valve rod is from top to down through described
In the inner cavity of valve casing and the inner cavity of valve seat and lower part is equipped with stem head, and the surface of the stem head is interior with the valve seat orifice of the valve seat
Side forms sealed cooperation, and the resetting spring is set in the inner cavity of the valve casing, which connects with the valve rod
Connect and the ejection valve rod be upward, the driving execution unit be fixedly connected on the top of the valve casing and be compressed on the valve rod it
On, which connect with high pressure servo oil pipe and drives the valve rod to move up and down to open using high pressure servo oil
Open and close the gerotor type air bleeding valve.
Further, the driving execution unit includes into oil head, shell, piston, upper check valve and lower check valve；Institute
It states piston to be set in the inner cavity of the shell and can slide up and down in the inner cavity, the lower end of the piston is resisted against the valve
The upper end of bar；The inner wall of the inner cavity lower part is equipped with inside annular protrusion, is equipped at the upper limb of the annular protrusion interior
End is connected to the lower throttle orifice of the inner cavity, and the top of the inner cavity is equipped with the upper throttle orifice that inner end is connected to the inner cavity, and an oil duct will
The upper throttle orifice is connected to lower throttle orifice；The lower check valve is set to the outer end of the lower throttle orifice and connects with oil return pipe
It connects；The upper check valve is set on the oil duct between the upper throttle orifice and lower throttle orifice；It is described into oil head hermetically
Mounted on the upper end of the shell, it is internally provided with the oil inlet on the inner cavity top and the high pressure servo oil pipe that are connected to the shell
Hole.
Further, the piston include the first cylinder and the second cylinder, the outer diameter of first cylinder with it is described into
The internal diameter of oilhole forms dynamic cooperation, and the outer diameter of second cylinder and the internal diameter of the inner cavity form dynamic cooperation, the piston with
Upper oil storage cavity is formed between the shell and extruding high pressure servo oil passes sequentially through throttle orifice, upper check valve and oil duct and enters institute
State lower throttle orifice.
Further, lower oil storage cavity is formed between the piston and the annular protrusion and squeezes high pressure servo oil leads to successively
It crosses down throttle orifice and lower check valve enters the oil return pipe.
Further, the stroke of the valve rod by the annular protrusion location determination.
Compared with prior art, the utility model has the beneficial effects that：
1, the utility model be gerotor type air bleeding valve, when inner pressure of air cylinder is excessive can directly open-top stem head and open,
Without additionally mounted safety valve, to simplify structure.
2, the upper and lower of the piston of the utility model forms the buffer structure based on oil storage cavity, efficiently avoid component it
Between hard collision, improve the service life of system；The buffer structure has compared with widely used damping spring before simultaneously
Advantage simple in structure reduces the difficulty of processing of whole device.
3, the utility model is resetted using the smaller resetting spring of rigidity rather than air spring, reduces entire dress
The manufacturing cost set.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the schematic enlarged-scale view for driving execution unit.
In figure：1-into oil head, 11-fuel feed holes, 2-pistons, the 21-the first cylinder, the 22-the second cylinder, 3-shells,
31-upper throttle orifices, 32-lower throttle orifices, 33-oil ducts, 34-annular protrusions, 35-upper oil storage cavities, 36-lower oil storage cavities, 4-
Valve rod, 41-stem heads, 5-valve casings, 6-valve seats, 61-cylinder through-holes, 62-valve seat orifices, 7-upper check valves, 8-times unidirectional
Valve, 9-resetting springs.
Specific implementation mode
Gerotor type air bleeding valve described in the utility model is done in the following with reference to the drawings and specific embodiments further detailed
It illustrates, but the scope of protection of the utility model should not be limited with this.
It please refers to Fig.1, it is illustrated that gerotor type air bleeding valve is mounted in cylinder head, which includes valve rod 4, valve casing 5, valve
Seat 6, resetting spring 9 and driving execution unit.
The valve seat 6 is equipped with the cylinder channel 61 being connected to cylinder, and the top of the cylinder channel 61 is valve seat orifice 62.It is described
Valve casing 5 is fixedly connected on the valve seat 6.
The valve rod 4 is from top to down through in the inner cavity of the valve casing 5 and the inner cavity of valve seat 6, and the valve rod 4
Lower part is equipped with stem head 41, the medial surface on the surface of the stem head 41 and the valve seat orifice 62 at 6 cylinder channel of the valve seat, 61 top
Sealed cooperation is formed, the switching channels of air bleeding valve are constituted.
The resetting spring 9 is set in the inner cavity of the valve casing 5, which is connect with the valve rod 4 and it
Spring force can the ejection valve rod 4 move upwards.
The driving execution unit is fixedly connected on the top of the valve casing 5, including into oil head 1, shell 3, piston 2, on
Check valve 7 and lower check valve 8；Described to be connect into oil head 1 with external high pressure servo oil pipe, the piston 2 is compressed on the valve
On bar 4.The driving execution unit is utilized by the high pressure servo oil entered into oil head 1, is controlled and is driven the valve rod 4
It moves up and down, to open and close the air bleeding valve.When air bleeding valve needs to close, external high pressure servo oil passes through the drive
The resistance that the piston 2 of dynamic execution unit drives the valve rod 4 to overcome the resetting spring 9 moves downward, and makes the stem head 41
It is pressed downward from top, closes the valve seat orifice 62 and blocks the cylinder channel 61, to close the gerotor type air bleeding valve；Work as row
When air valve needs to open, high pressure servo oil stream goes out the driving execution unit and is discharged into oil return pipe, the restoring force of the resetting spring 9
Pressure collective effect in the cylinder channel 61, pushes the valve rod 4 to move upwards, and the stem head 41 is made to be upwardly separated from
The valve seat orifice 62, to connect the cylinder channel 61, to open the gerotor type air bleeding valve.When inner pressure of air cylinder is excessive
Can directly open-top stem head 41 and open the gerotor type air bleeding valve, additionally mounted safety valve is not necessarily to, to simplify structure.
Referring to Fig. 2, the upper end that the shell 3 is sealably mounted at into oil head 1, is internally provided with fuel feed hole 11, it should
11 inner end of fuel feed hole is connected to the top of the inner cavity of the shell 3, and outer end connects the high pressure servo oil pipe.
The piston 2 is set in the inner cavity of the shell 3, and can be slided up and down in the inner cavity, the piston 2
Lower end is resisted against the upper end of the valve rod 4.The piston 2 has two level cylindrical form, to ensure in 4 opening process of the valve rod
Guiding role, and the valve rod 4 be opened and closed latter stage generate throttling action, carry out hydraulic cushion.The piston 2 includes the first circle
Column 21 and the second cylinder 22, the diameter of first cylinder 21 are less than the diameter of the second cylinder；The outer diameter of first cylinder 21 with
The internal diameter of the fuel feed hole 11 into oil head 1 forms dynamic cooperation, the outer diameter of second cylinder 22 and the inner cavity of the shell 3
Internal diameter forms dynamic cooperation.
The inner wall of the lower part of the inner cavity of the shell 3 is equipped with inside annular protrusion 34, against the annular protrusion 34
Lower throttle orifice 32 is equipped at upper limb, the inner end of the lower throttle orifice 32 is connected to the lower part of the inner cavity of the shell 3；The top of the inner cavity
Equipped with upper throttle orifice 31, inner end of throttle orifice 31 is connected to the top of the inner cavity of the shell 3 on this, and an oil duct 33 is communicated in described
Between upper throttle orifice 31 and lower throttle orifice 32.The stroke of the valve rod 4 by the annular protrusion 34 location determination and can
Position by changing the annular protrusion 34 is adjusted.
The lower check valve 8 is set to the outer end of the lower throttle orifice 32 and is connect with external oil return pipe.The upper list
It is set on the oil duct 33 between the upper throttle orifice 31 and lower throttle orifice 32 to valve 7.The upper check valve 7 and lower unidirectional
Valve 8 plays throttling for preventing the servo oil in oil return circuit from blowing back into driving execution unit when the valve rod 4 is closed
Effect carries out hydraulic cushion.
In the gerotor type exhaust valve opening latter stage, 2 uplink of the piston, first cylinder 21 enters described into oil head
1 fuel feed hole 11, forms upper oil storage cavity 35 between the piston 2 and the shell 3, the piston 2 squeezes high pressure servo oil successively
Enter the lower throttle orifice 32 by upper throttle orifice 31, upper check valve 7 and oil duct 33, it is slow to generate throttling action progress hydraulic pressure
Punching, it is described into oil head 1 to prevent the piston 2 from directly impinging.
In the gerotor type exhaust valve closure latter stage, 2 downlink of the piston, between the piston 2 and the annular protrusion 34
Lower oil storage cavity 36 is formed, the extruding high pressure servo oil of the piston 2 passes sequentially through lower throttle orifice 32 and lower check valve 8 enters described return
Oil pipe carries out hydraulic cushion, to prevent the piston 2 from directly impinging the shell 3 to generate throttling action.
The concrete operating principle of the utility model is as follows：
When exhaust valve closure, control system (not shown) sends out control signal, (in figure not by exhaust valve control unit, VCU
Show) servo of the high pressure all the way oil drawn by entering the upper oil storage cavity 35 of 2 top of driving execution unit piston into oil head 1, and
Piston 2 and valve rod 4 is pushed to overcome the resistance of resetting spring 9 by exhaust valve closure.Since driving force is larger when valve rod 4 is closed, it is
Prevent piston 2 from directly impinging shell 3, annular protrusion 34 and piston 2, the tight fit of valve rod 4 of 3 lower part of shell form lower storage
Oil pocket 36.When valve rod 4 moves downward, piston 2 squeezes the fluid in lower oil storage cavity 36 and them is made to pass through 32 He of lower throttle orifice
Lower check valve 8 enters oil return line, throttling action is generated, into row buffering.
When exhaust valve opening, control system (not shown) sends out control signal, 2 top of driving execution unit piston
Upper oil storage cavity 35 is connected with oil return line, and piston 2 and valve rod 4 upwardly open under the influence of resetting spring 9 and cylinder cylinder pressure.Due to
Cylinder pressure is larger, to prevent piston 2 from directly impinging into oil head 1, is needed into row buffering in exhaust valve opening latter stage.When on piston 2
Row, forms upper oil storage cavity 35 when the first cylinder 21 is entered into the fuel feed hole 11 of oil head 1, between piston 2 and shell 3, piston 2 squeezes
Fluid makes it through throttle orifice 31, upper check valve 7 and oil duct 33 and enters lower throttle orifice 32 and piston 2 and 3 convex annular of shell
The lower oil storage cavity 36 between 34 is played, throttling action is generated, into row buffering.
It above are only the preferred embodiment of the utility model, it must further be noted that, those skilled in the art Fan Yiben
Various equivalent modifications, variation and amendment made by utility model application content should all become the protection model of the utility model patent
It encloses.
Claims (5)
1. a kind of gerotor type air bleeding valve, be mounted in cylinder head, which is characterized in that the gerotor type air bleeding valve include valve rod,
Valve casing, valve seat, resetting spring and driving execution unit；The valve seat is equipped with the cylinder channel being connected to cylinder, the cylinder channel
Top be valve seat orifice, the valve casing is fixedly connected on the valve seat, and the valve rod is from top to down through the valve
In the inner cavity of shell and the inner cavity of valve seat and lower part is equipped with stem head, the inside on the surface of the stem head and the valve seat orifice of the valve seat
Face forms sealed cooperation, and the resetting spring is set in the inner cavity of the valve casing, which connect with the valve rod
And the ejection valve rod is upward, the driving execution unit be fixedly connected on the top of the valve casing and be compressed on the valve rod it
On, which connect with high pressure servo oil pipe and drives the valve rod to move up and down to open using high pressure servo oil
Open and close the gerotor type air bleeding valve.
2. gerotor type air bleeding valve according to claim 1, which is characterized in that the driving execution unit includes oil inlet
Head, shell, piston, upper check valve and lower check valve；The piston is set in the inner cavity of the shell and can be in the inner cavity
In slide up and down, the lower end of the piston is resisted against the upper end of the valve rod；The inner wall of the inner cavity lower part is equipped with inside ring
Shape protrusion is equipped with the lower throttle orifice that inner end is connected to the inner cavity at the upper limb of the annular protrusion, and the top of the inner cavity is equipped with
Inner end is connected to the upper throttle orifice of the inner cavity, and the upper throttle orifice is connected to by an oil duct with lower throttle orifice；It is described lower unidirectional
Valve is set to the outer end of the lower throttle orifice and is connect with oil return pipe；The upper check valve is set to the upper throttle orifice and lower throttling
On the oil duct between hole；The upper end that the shell is sealably mounted at into oil head is internally provided with the connection shell
Inner cavity top and the high pressure servo oil pipe fuel feed hole.
3. gerotor type air bleeding valve according to claim 2, which is characterized in that the piston includes the first cylinder and second
Cylinder, the outer diameter of first cylinder and the internal diameter of the fuel feed hole form dynamic cooperation, the outer diameter of second cylinder with it is described
The internal diameter of inner cavity forms dynamic cooperation, forms upper oil storage cavity between the piston and the shell and squeezes high pressure servo oil and leads to successively
It crosses throttle orifice, upper check valve and oil duct and enters the lower throttle orifice.
4. gerotor type air bleeding valve according to claim 2, which is characterized in that shape between the piston and the annular protrusion
Lower throttle orifice is passed sequentially through at lower oil storage cavity and extruding high pressure servo oil and lower check valve enters the oil return pipe.
5. gerotor type air bleeding valve according to claim 2, which is characterized in that the stroke of the valve rod is by the convex annular
The location determination risen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890137.4U CN207762332U (en) | 2017-12-29 | 2017-12-29 | A kind of gerotor type air bleeding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890137.4U CN207762332U (en) | 2017-12-29 | 2017-12-29 | A kind of gerotor type air bleeding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207762332U true CN207762332U (en) | 2018-08-24 |
Family
ID=63185839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721890137.4U Active CN207762332U (en) | 2017-12-29 | 2017-12-29 | A kind of gerotor type air bleeding valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207762332U (en) |
-
2017
- 2017-12-29 CN CN201721890137.4U patent/CN207762332U/en active Active
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