CN110207991A - Cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston - Google Patents
Cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston Download PDFInfo
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- CN110207991A CN110207991A CN201910555103.7A CN201910555103A CN110207991A CN 110207991 A CN110207991 A CN 110207991A CN 201910555103 A CN201910555103 A CN 201910555103A CN 110207991 A CN110207991 A CN 110207991A
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- crosshead
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- cooling oil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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Abstract
The purpose of the present invention is to provide cooling oil duct Oscillation Flows visual Simulation devices in crosshead diesel engine piston, including hosting model, hosting model includes base, crankshaft, crosshead, piston head, guide rail, base includes upper frame and lower support, crankshaft is mounted between upper frame and lower support by duct, guide rail is fixed on upper frame, the lower end of connecting rod connects crankshaft by the rod journal of crankshaft, the upper end of connecting rod connects crosshead, the sliding block of the installation of cross both sides of head and guide rail cooperation, crosshead top is equipped with groove, piston boit lower end is mounted in groove, piston boit upper end connects piston head, cooling oil-in and cooling-oil outlet are set on sliding block, flow channel and flow pass are set in crosshead.The present invention can be continuously shot the Oscillation Flows distribution situation and cooling oil filling situation of piston head internal flow, under also recordable different rotating speeds, different pressures, different flow, at a temperature of different cooling oils in cooling chamber two phase flow moving situation and full level.
Description
Technical field
The present invention relates to a kind of experimental rigs, specifically diesel engine testing device.
Background technique
Piston in diesel combustion room subjects periodic mechanical load and thermic load, and piston head temperature will be excessively high to be led
Activation plug strength reduction, top land burn or the damage such as deadlocked.There is a cooling chamber in piston inner structure, cooling chamber can
Effectively to take away the indoor most of heat flow of burning.Whether the design of piston head internal cooling cavity is reasonable, directly affects diesel engine
Reliability, economy and service life.
Have for the development example of Oscillation Flows simulation test device: CN101509824A, CN101793607A,
CN102032991A, CN103994881A, CN108007693A etc. disclose a kind of piston vibrating cooling test device, wherein
The piston simulation model of CN101509824A and CN108007693A is constituted using transparent material, in observable piston inner-cooling oil recess
Cooling oil mobility status；CN101793607A passes through the oil collecting in fueling injection equipment and the cooling chamber outlet of plunger shaft entrance
Device can accurately obtain the oil flow rate of engine piston cooling chamber；CN102032991A increase piston heating system and
Engine oil heating device, the thermo parameters method of analog actual condition lower piston and the temperature conditions of cooling oil；
CN103994881A increases hot-gas generator, using temperature of the temperature inductor measurement piston under different spray nozzles flow
Degree, verifying piston vibrating oil pocket and the matched reasonability of distributive value.
But the above patent belongs to oil spout oscillation cooling, does not have consideration without oil spout oscillation cooling to inner-cooling oil recess, and cold
But inner-cavity structure is simple, does not consider to rely on without nozzle by telescopic sleeve and built-in oil circuit in large-sized low-speed crosshead type diesel engine
Move back and forth the form for realizing that oscillation is cooling.
Summary of the invention
The purpose of the present invention is to provide the crosses that can really show two phase flow moving situation inside piston complexity cooling chamber
Cooling oil duct Oscillation Flows visual Simulation device in head dummy diesel engine piston.
The object of the present invention is achieved like this:
Cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston of the present invention, it is characterized in that: packet
Hosting model is included, the hosting model includes base, crankshaft, crosshead, piston head, guide rail, and base includes upper frame and lower machine
Seat, upper frame are connected with lower support, and the two sides of upper frame and lower support are provided with duct, and crankshaft is mounted on upper frame by duct
Between lower support, guide rail is fixed on upper frame, and connecting rod, crosshead, piston head are respectively positioned on guide rail interior, and the lower end of connecting rod is logical
The rod journal connection crankshaft of crankshaft is crossed, the upper end of connecting rod connects crosshead, and cross both sides of head installs the sliding block with guide rail cooperation,
Crosshead top is equipped with groove, and piston boit lower end is mounted in groove, and piston boit upper end connects piston head, and cooling is arranged on sliding block
Oil-in and cooling-oil outlet, are arranged flow channel and flow pass in crosshead, and an end of flow channel is and cooling
The cooling oil inflow entrance that oil-in communicates, an end of flow pass are the cooling oil outlet communicated with cooling-oil outlet.
The present invention may also include:
It 1, further include oil supply system, the oil supply system includes storage tank, oil feed pump, first sensor group, second sensor
The cooling-oil outlet of group, pre-treating filter, post-processing filtering equipment, sliding block connects storage tank by oil supply loop, storage tank
Outlet includes two-way, and the first via is sequentially connected pre-treating filter, oil feed pump, first sensor group, fuel feeding main road, the second tunnel
It is connected to fuel feeding bypass, pressure valve is installed on fuel feeding bypass, fuel feeding main road and fuel feeding bypass are pooled to oil supply bar's line, oil supply bar
The cooling oil-in of line connection sliding block installs second sensor group, post-processing filtering equipment on oil supply bar's line；First sensor
Group includes first flow sensor, first pressure sensor, the first temperature sensor, and second sensor group includes that second flow passes
Sensor, second pressure sensor, second temperature sensor, storage tank include liquid level sensor, third temperature sensor.
It 2, further include drive system, the drive system includes variable-frequency motor, speed reducer, and variable-frequency motor passes through plum blossom shaft coupling
Device connects speed reducer, and speed reducer passes through unilateral flange coupling and connects crankshaft.
3, the side of guide rail opens up the aperture for installing camera support, installs video camera on camera support；Described is small
Hole is distributed in the side of guide rail in column, so that the position of camera support is variable.
Present invention has an advantage that
1, previous testing stand patent is directed to Oil injection cooling, to the built-in runner complexity piston head inner cavity of crosshead diesel engine
The research of structure is very few, proposes a kind of simulator of crosshead diesel engine complexity piston coolant flow channel.
2, by replacement piston boit and piston head, the oscillation cooled flow feelings of different piston heads can be studied in a certain range
Condition has versatility to a certain extent.
3, it is provided with vertical core on guide rail, by changing movable supporting frame in different location, shot cold under different crank angles
But the biphase oscillation mobility status of oil pocket, it is simple and efficient to handle.
4, temperature, flow, pressure and the oil supply system being described in detail, the driving system of a set of adjustable cooling oil are provided
System, high speed video system and control system, provide reference for experimental design.
Detailed description of the invention
Fig. 1 is hosting model, drive system and oil supply system schematic diagram；
Fig. 2 is hosting model and drive system side view；
Fig. 3 is hosting model sectional view and drive system side view；
Fig. 4 is hosting model partial cutaway view；
Fig. 5 is hosting model base and guide rail three-dimensional figure；
Fig. 6 is crosshead and sliding block combination three-dimensional figure；
Fig. 7 a is crosshead entirety runner three-dimensional perspective, and Fig. 7 b is crosshead flow pass three-dimensional perspective, and Fig. 7 c is
Crosshead flow channel three-dimensional perspective；
Fig. 8 a is camera support plan view side view, and Fig. 8 b is camera support plan view main view；
Fig. 9 is camera support three-dimensional figure.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1-9, the present invention proposes that cooling oil duct Oscillation Flows are visual in a kind of crosshead diesel engine complexity piston
Change simulator, including hosting model, drive system, oil system, high speed video system, control system.Wherein:
Hosting model is crosshead single cylinder diesel structure, including base 3, guide rail bracket 4, crankshaft 1, balance weight 2, connecting rod
9, crosshead 8, piston boit 5 and visualization piston head 6.
Visualization 6 model of piston head is not connected with connecting rod 9, but is fixed on the piston boit 5, the visualization piston
Model head 6 is large-sized low-speed diesel engine piston model, and inside is equipped with complicated coolant flow channel, and visualizes 6 model of piston head by having
Machine glass is cast；
Drive system includes variable-frequency motor 14, plum coupling 13, speed reducer 12, unilateral flange coupling 11 and pedestal 15
It constitutes；
Oil supply system includes that oil storage tank 21, oil feed pump 22, filter, pressure gauge, flowmeter, thermometer etc. are constituted；
High speed video system includes camera support 32, camera, control storage device.
Control system includes electrical control cabinet and programmable controller.
It is identical as large cross-head diesel engine principle in hosting model, connecting rod is driven by crankshaft, connecting rod other end connects
Crosshead is connect, cross both sides of head is equipped with sliding block, and sliding block makes the rotary motion of crankshaft be changed into piston under the constraint of guide rail bracket
Head pumps.
Visualize piston head model, wherein the visualization piston head model is original according to crosshead diesel engine piston head
Type retains its internal structure using pmma material and casts.For the light reflection for reducing circular configuration, external structure is changed
For minimum square structure.It is cooling according to different piston heads since the visualization piston head is connect by piston boit with crosshead
Runner inflow and outflow mode processes different piston boits to cooperate crosshead runner inflow and outflow mouth, and then realizes replaceable different living
Chock plug model piston column length different with adjustment.
Different from the cooling of nozzle type piston, the cooling oil in crosshead diesel engine is flowed into piston head by crosshead
Coolant flow channel.It is set inside above-mentioned crosshead there are two flow channel, one is cooling oil flow channel, another is cooling oil stream
Channel out.Cooling oil one end of the channel is communicated with slide channel in crosshead, and the other end is communicated with piston boit inner passage.Cooling oil
Enter flow channel inside crosshead by the inflow entrance on sliding block, is entered inside piston head after flowing through piston boit, cooling oil
After completing oscillation cooling, piston boit is flowed through from the flow pass of piston both sides of head, by crosshead flow pass, is flowed out from sliding block
Channel discharge.
Drive system, driving motor connect frequency converter and realize frequency conversion.Variable-frequency motor is by driving speed reducer to drive master
Machine model, by the reciprocating motion for realizing visualization piston head model under the limitation of base upper rail.
Oil supply system is extracted lubricating oil out by oil feed pump out of lubricating oil storage tank, passes through flow sensor, pressure sensor, temperature
It spends sensor and reads each parameter value in oil circuit, by the pressure limit of pressure valve regulation cooling oil, be equipped with heating in lubricating oil storage tank
Stick, lubricating oil flow into variable temperatures.
In high speed video system, camera is fixed on plate.Camera is back and forth being transported for shooting and recording piston head model
During dynamic in different crank angle lower piston head cooling chambers the flowing of two phase flow and oscillatory condition.Due to cold inside piston head
But oil stream road is complicated, can be taken by high speed camera cooling inside a series of piston head in a certain section under reciprocating motion states
The flowing of intracavitary cooling oil and oscillation image, image are stored by storage facilities, are further analyzed for follow-up study.It can be by camera
It is fixed on the cooling oil filling situation of observation piston head inner cavity right above piston head, the group of optical fiber and camera also can be selected
Conjunction form is used to shoot piston head inner cavity.
Control system is control machine PLC, can control driving motor start-stop, controls oil pump start-stop, receives sensor signal,
Control heating rod temperature value and control piper pressure.
Test method of the present invention, comprising the following steps:
One, corresponding visualization lucite plunger model, and processing are processed according to studied piston cavity flow passage structure
The piston boit of its suitable runner, including piston column length.After hosting model installation, guarantee that crank link mechanism is located at lower dead center position
It sets, sliding block is good with guide rail contact.
Two, each structural connection position manual lubrication in hosting model is controlled in lubricating oil storage tank by control system and is heated
The temperature value of stick, oil temperature are stablized after desired value, start driving motor by control system, by adjusting Frequency Converter Control
Speed reducer exports revolving speed, when hosting model slowly rotates, oil pump is opened by control system, by pressure valve control piper
Oil pressure, read pressure, the flow, temperature value of pipeline.
Three, in stabilization of speed in rated speed, after each parameter value of pipeline is stablized, crank link mechanism is steady under certain revolving speed
Fixed operating, opens high speed video system, carries out shooting record to cooling oil duct in piston head, adjusts movable supporting frame to shoot note
Two phase flow Oscillation Flows situation in cooling oil duct in piston head under record different location.
Four, Oscillation Flows situation shooting record finishes under each crank angle, driving motor and oil pump is simultaneously stopped, to note
The data of record are analyzed and processed, and show that inner-cooling oil recess two phase flow vibrates distribution situation.
Five, driving motor is adjusted by control system and adjusts rotation speed change, adjusting pressure valve change loine pressure, adjusted and supply
Oil pump provides different flow, adjusts the different cooling oil temperature of heating rod control, obtains cooling oil under each crank angle by experiment
Chamber two phase flow vibrates distribution situation and record relevant experimental data.
Hosting model include base 3, guide rail 4, crankshaft 1, balance weight 2, piston boit 5, piston head 6, sliding block 7, crosshead 8,
Connecting rod 9.Base is divide into upper part and lower part, and upper frame 301 and 302 two sides of lower support are provided with duct, and upper frame and lower support are logical
It crosses and is bolted.3 liang of side opening of crankshaft main bearing 1 and base cooperate, and realize left and right constraint by base bearing upper flange plate.It is flat
The quality of weight 2 show that balance weight 2 is mounted on crankshaft main bearing by flange after being computed.The crankshaft other end is equipped with flange
Disk connects driving equipment by unilateral flange coupling 11.Guide rail 4 is welded on base 3, and 4 two sides of guide rail are provided with multiple apertures.
The rod journal of crankshaft is connect with connecting rod 9, and 9 other end of connecting rod is connect with crosshead 8, and cross both sides of head is equipped with cunning
Block 7, sliding block 7 are matched with the slideway of guide rail 4, and 8 top of crosshead is equipped with groove, and piston boit 5 is mounted on crosshead 8 by bolt
On groove, piston head 6 is mounted on piston boit by bolt, and the primary structure of large cross-head engine itself is known
, it is no longer further elaborated herein.Have cooling oil inflow and outflow logical inside crosshead 8, piston boit 5 and piston head 6
Road, 7 top of sliding block are provided with hole, communicate with the cooling oil inlet port of crosshead 8.
Visualization 6 model of piston head is connect by bolt with the piston boit 5.Since the visualization piston head passes through work
Stick harness 5 is connect with crosshead 8.Above-mentioned crosshead 8 is bolted with sliding block 7, the cooling oil-in 71 of sliding block 7 and crosshead
8 cooling oil inflow entrance 811 cooperates, and with gasket seal, the cooling oil outflux 72 of sliding block 7 and the cooling oil of crosshead 8 are discharged
Mouth 821 cooperates, and guarantees good seal with gasket, cooling oil is flowed into from the cooling oil-in 71 of sliding block 7, flowed into through crosshead cooling oil
Mouth 811 enters flow channel 81, flows in piston boit cooling oil flow channel from flow channel 81, cooling oil is cold through piston vibrating
But it after, back in the cooling oil flow pass of piston boit, by crosshead flow pass 82, is successively discharged by cooling oil
Mouth 821 and the cooling-oil outlet 72 of crosshead 8 are discharged.
Drive system is by variable-frequency motor 14, plum coupling 13, speed reducer 12, unilateral flange coupling 11 and 15 structure of pedestal
At.Variable-frequency motor 14 and speed reducer 12 are connect by plum coupling 13, and speed reducer 12 and the right base bearing of the crankshaft 102 are with method
Lan Duan passes through unilateral flange coupling 11 and is connected.Driving motor 14 is passed through by driving speed reducer 12 to drive hosting model
The reciprocating motion of visualization piston head model is realized under the limitation of base upper rail 4.The variable-frequency motor 14, speed reducer 12 pass through
Bolt is connected with pedestal 15.
Oil supply system is made of oil storage tank 21, oil feed pump 22, filter 26, sensor group 25 etc..Above-mentioned oil supply system is logical
The oil feed pump 22 for crossing fuel feeding main road 201 extracts cooling oil out out of storage tank 21, by sensor group 23 on fuel feeding main road 201
Flow sensor 231, pressure sensor 232, temperature sensor 233 read each parameter value in oil circuit, pass through fuel feeding bypass 202
Pressure valve 24 adjusts the pressure limit of cooling oil, and cooling oil is pooled to oil supply bar's line from fuel feeding main road 201 and fuel feeding bypass 202
On 203, there is sensor group 25 on oil supply bar's line 203, the record of sensor group 25 flows into diesel engine cooling oil parameter.Oil supply system
If pre-treating filter 26 is used to filter out impurity in storage tank and protects oil feed pump, and post-processing filtering is set there are two filter plant
Standby 27 are used to filter out in pipeline impurity to protect diesel engine.Be equipped in storage tank liquid level sensor 211, temperature sensor 212,
Heating rod 213, lubricating oil flow into variable temperatures.Oil supply bar's line 203 connects the cooling oil-in 71 of hosting model sliding block 7, sliding block 7
Cooling-oil outlet 72 connect oil supply loop 204 return storage tank.
High speed video system is made of high-speed camera 31, camera support 32, control storage equipment 33.Camera support is by can
Mobile bracket 3201 and plate 3202 form, and the threaded post on movable supporting frame 3201 passes through the aperture on sliding block, pass through nut
Fixed, plate 3202 and movable supporting frame 3201 are bolted, and strip duct 3203 is provided on plate, to stationary phase
Machine.Camera support 32 is mounted on bolt on the aperture of the different height of guide rail 4, being shot with realization can under different crank angles
Fluid mobility status depending on changing piston cavity.
Control system is control machine PLC40, can control 14 start-stop of variable-frequency motor, controls 22 start-stop of oil feed pump, receives sensing
Device group 23,25 signals control 213 temperature value of heating rod and control 24 control piper pressure of pressure-regulating valve.
Fidelity of the present invention is strong, can be continuously taken the flow condition of fluid in piston head internal cooling cavity, in cooling chamber
Cooling oil fills situation, also can record under different cooling oil temperature, different rotating speeds, under different pressures, cooling chamber under different flow
The moving situation and full level of interior two phase flow provide secure support for piston head product design assessment.
Claims (5)
1. cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston, it is characterized in that: including host mould
Type, the hosting model include base, crankshaft, crosshead, piston head, guide rail, and base includes upper frame and lower support, upper frame
It is connected with lower support, the two sides of upper frame and lower support are provided with duct, and crankshaft is mounted on upper frame and lower support by duct
Between, guide rail is fixed on upper frame, and connecting rod, crosshead, piston head are respectively positioned on guide rail interior, and the lower end of connecting rod passes through crankshaft
Rod journal connects crankshaft, and the upper end of connecting rod connects crosshead, and cross both sides of head is installed and the sliding block of guide rail cooperation, in crosshead
Portion is equipped with groove, and piston boit lower end is mounted in groove, and piston boit upper end connects piston head, be arranged on sliding block cooling oil-in and
Cooling-oil outlet, is arranged flow channel and flow pass in crosshead, and an end of flow channel is and cooling oil-in phase
Logical cooling oil inflow entrance, an end of flow pass are the cooling oil outlet communicated with cooling-oil outlet.
2. cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston according to claim 1,
It is characterized in that: further including oil supply system, the oil supply system includes storage tank, oil feed pump, first sensor group, second sensor
The cooling-oil outlet of group, pre-treating filter, post-processing filtering equipment, sliding block connects storage tank by oil supply loop, storage tank
Outlet includes two-way, and the first via is sequentially connected pre-treating filter, oil feed pump, first sensor group, fuel feeding main road, the second tunnel
It is connected to fuel feeding bypass, pressure valve is installed on fuel feeding bypass, fuel feeding main road and fuel feeding bypass are pooled to oil supply bar's line, oil supply bar
The cooling oil-in of line connection sliding block installs second sensor group, post-processing filtering equipment on oil supply bar's line；First sensor
Group includes first flow sensor, first pressure sensor, the first temperature sensor, and second sensor group includes that second flow passes
Sensor, second pressure sensor, second temperature sensor, storage tank include liquid level sensor, third temperature sensor.
3. cooling oil duct Oscillation Flows visual Simulation fills in crosshead diesel engine piston according to claim 1 or 2
It sets, it is characterized in that: further including drive system, the drive system includes variable-frequency motor, speed reducer, and variable-frequency motor is joined by plum blossom
Axis device connects speed reducer, and speed reducer passes through unilateral flange coupling and connects crankshaft.
4. cooling oil duct Oscillation Flows visual Simulation fills in crosshead diesel engine piston according to claim 1 or 2
It sets, it is characterized in that: the side of guide rail opens up the aperture for installing camera support, video camera is installed on camera support；Described
Aperture is distributed in the side of guide rail in column, so that the position of camera support is variable.
5. cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston according to claim 3,
It is characterized in that: the side of guide rail opens up the aperture for installing camera support, video camera is installed on camera support；The aperture
It is distributed in the side of guide rail in column, so that the position of camera support is variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555103.7A CN110207991A (en) | 2019-06-25 | 2019-06-25 | Cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555103.7A CN110207991A (en) | 2019-06-25 | 2019-06-25 | Cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston |
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| CN110207991A true CN110207991A (en) | 2019-09-06 |
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| CN201910555103.7A Pending CN110207991A (en) | 2019-06-25 | 2019-06-25 | Cooling oil duct Oscillation Flows visual Simulation device in crosshead diesel engine piston |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110685881A (en) * | 2019-09-27 | 2020-01-14 | 平顶山市神马万里化工股份有限公司 | Driving device for linkage of multiple pump heads |
| CN114018973A (en) * | 2021-11-08 | 2022-02-08 | 河北科技大学 | Annular piston oil cavity experimental piece for oscillatory heat transfer and visualization experiment |
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Application publication date: 20190906 |