CN109939604B

CN109939604B - Fuel mixing device

Info

Publication number: CN109939604B
Application number: CN201910257723.2A
Authority: CN
Inventors: 周枫; 周新聪; 乔信起; 黄健; 孙春华; 方骁远; 刘宇
Original assignee: Wuhan University of Technology WUT; Zhejiang Marine Development Research Institute
Current assignee: Wuhan University of Technology WUT; Zhejiang Marine Development Research Institute
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2021-01-26
Anticipated expiration: 2039-04-01
Also published as: CN109939604A

Abstract

The invention discloses a fuel mixing device, which comprises a mixing tank, wherein the mixing tank is a rotating body, a filling port and an air inlet are arranged on the mixing tank, a fuel mixer is arranged in the mixing tank, the fuel mixer comprises a rotating shaft and a spiral blade, the rotating shaft is rotatably connected to the mixing tank, the spiral blade is spirally fixed on the rotating shaft, a dynamic sealing structure is arranged between the edge of the spiral blade and the inner wall of the mixing tank, and a turbulence strengthening structure is arranged on the fuel mixer. This fuel mixing arrangement can carry out the fuel mixing through the torrent effect at the in-process that the fuel flows, and the fuel can flow while mixing, consequently can improve fuel mixing efficiency, and uses this fuel mixing arrangement, can make the fuel carry out echelon mixing through the mixed mode of difference in blending tank, the secondary blending tank, produces better fuel mixing effect.

Description

Fuel mixing device

Technical Field

The present invention relates to a fuel blending device, and more particularly, it relates to a fuel mixing device.

Background

With the increasingly prominent contradiction between supply and demand of petroleum fuel and the increasingly stringent emission requirements of internal combustion engines in the world, the traditional single petrochemical fuel internal combustion engine is difficult to meet the increasingly higher requirements on energy conservation and environmental protection. Therefore, the mixed fuel is prepared by mixing a plurality of fuels according to a certain proportion, so that the comprehensive physical and chemical properties of the mixed fuel meet the concept of 'fuel design' of energy conservation, environmental protection and the like, and the mixed fuel is widely accepted and can be widely applied as a substitute fuel. At present, the application of mixed fuel such as methanol gasoline, ethanol gasoline, biodiesel and the like in the field of automobiles is gradually becoming climate, and the alternative fuel is widely applied to marine transportation and water area power equipment such as sailing boats, fishing boats, law enforcement boats, yachts and the like. How to mix the multiple fuel of different rerum natura, different states, need an efficient mixing arrangement, and current fuel mixing arrangement adopts the agitator to stir more and mixes, and the agitator need can reach the homogeneous mixing to the fuel stirring certain time in the container, and mixing efficiency is not high. The invention with the publication number of CN108014679A specially discloses biomass liquid fuel mixing equipment in 2018, 5 month and 11 days, which comprises a device shell, wherein one side of the upper end of the device shell is provided with a first feeding device, and the other end of the device shell is provided with a feed inlet, one end of the device shell far away from the first feeding device is provided with a discharging device, the upper end of the inner cavity of the device shell is provided with a centralized processing device, one end of the centralized processing device is provided with a connecting port, the inner cavity of the device shell is provided with a mixing cavity, both ends of the inner wall of the mixing cavity are provided with adjusting devices, one end of the adjusting device is provided with a connecting shaft through a clamping device, the outer side of the connecting shaft is provided with a mixing device, the number of the mixing devices is 8-16, and the lower end of the mixing cavity is provided with an electronic valve which is connected with a discharging device. The invention has simple use and convenient installation, is convenient for a user to use, and ensures that the user has good convenience in the use process. However, as mentioned above, the present invention also adopts stirring mode for mixing, and is not efficient.

Disclosure of Invention

The conventional fuel mixing device has low mixing efficiency, and in order to overcome the defect, the invention provides the fuel mixing device capable of improving the mixing efficiency.

The technical scheme of the invention is as follows: the utility model provides a fuel mixing device, includes the blending tank, and the blending tank is the rotator, is equipped with filler and air inlet on the blending tank, is equipped with fuel mixer in the blending tank, and fuel mixer includes pivot and helical blade, and the pivot is rotated and is connected on the blending tank, and helical blade spirals and fixes in the pivot, is dynamic seal structure between helical blade edge and the blending tank inner wall, is equipped with the torrent on the fuel mixer and strengthens the structure. There is a phenomenon of the fluid known as turbulence, which is advantageous in promoting mixing of the fluid. When the fuel mixing device works, two or more kinds of fuels to be mixed are injected from the filling port and flow in the spiral flow passage formed by the spiral blade and the inner wall of the mixing tank, and the turbulence strengthening structure can enable the fuels to generate turbulence in the flowing process, thereby promoting the mixing of the fuels. The rotating shaft is connected with an external driving device to obtain rotating power, and the helical blades have a pushing effect on the fuel, so that the fuel is accelerated and flows in the helical flow channel, turbulent flow motion is easier to occur, and the fuel is more favorably mixed. The fuel mixing device can mix fuel through turbulence effect in the flowing process of the fuel, and the fuel can flow and mix at the same time, so that the fuel mixing efficiency can be improved.

Preferably, the turbulence reinforcing structure is a turbulence bump, and the turbulence bump is fixed on the spiral surface of the spiral blade. Various obstacles that may enhance the flow pattern of the fluid may act as turbulence-enhancing structures. The turbulence projections with certain intervals, which are directly arranged on the fluid flow surface, are turbulence intensifying structures which are easier to implement. When fuel flows through the turbulence lugs, periodically unstable flow can be generated in a boundary layer of the fuel fluid, and the boundary layer is damaged, so that the mixing of the fuel fluid is enhanced.

Preferably, the mixing tank is in the shape of a circular truncated cone, and the output end of the mixing tank is positioned at the smaller end of the mixing tank. The blending tank has the tapering, and the helical blade external diameter also reduces gradually in order to adapt to with the blending tank tapering, and from the blending tank input to output like this, the spiral runner volume dwindles gradually, and the air in the blending tank is constantly compressed, and atmospheric pressure crescent more promotes fuel pressurization and flow with higher speed, reinforcing torrent effect. In addition, the pressurized fuel is delivered from the mixing tank at a relatively high velocity and with a relatively high impact force, and may also be utilized.

Alternatively, the mixing tank is cylindrical, with the pitch of the helical blades decreasing from the input end to the output end of the mixing tank. The pitch of the helical blades is gradually reduced, so that the volume of the helical flow passage is gradually reduced, and the air pressure is gradually increased, so that the effects of promoting fuel pressurization and flow acceleration and enhancing a turbulence effect are also achieved.

Preferably, the turbulator tabs are welded to the helical blades. The turbulence lug is fixed on the spiral blade in a welding mode, and compared with other fixing modes, the structure is simpler and is easier to implement.

Preferably, the fuel mixing device further comprises a secondary mixing tank, the secondary mixing tank is connected to the output end of the mixing tank, the secondary mixing tank is communicated with the mixing tank through a pressure jet hole, and a vibration mixer is arranged in the secondary mixing tank. After the fuel is mixed in the mixing tank in the first stage, the fuel can enter the secondary mixing tank through the pressure jet hole and is further mixed under the action of the vibration mixer, and the fusion degree of the mixed fuel is improved.

Preferably, the vibration mixer comprises a hollow screw, an impact plate and a vibration spring, a middle shaft rod is fixedly arranged at the axis position of the secondary mixing tank, the hollow screw, the impact plate and the vibration spring are slidably sleeved on the middle shaft rod, the impact plate and the vibration spring are respectively connected to two ends of the hollow screw, and the impact plate is positioned at the input end of the secondary mixing tank and corresponds to the pressure jet hole. So that the vibration mixer generates vibration power. Under the constraint of the middle shaft rod, the hollow screw rod and the impact plate can move along the middle shaft rod in a fixed path. The pressurized fuel in the mixing tank has high speed when being output, the kinetic energy carried by the primary mixed fuel sprayed out from the pressure spray hole at high speed can be continuously utilized, the primary mixed fuel impacts on the impact plate, the impact force is transmitted to the vibration spring through the hollow screw rod to force the vibration spring to compress, after the vibration spring is compressed to a certain degree and is enough to resist the impact force, the vibration spring rebounds again, the circulation is repeated, the hollow screw rod and the impact plate form dynamic balance under the combined action of the fuel impact force and the elastic force of the vibration spring, the external expression is that the hollow screw rod reciprocates along the axial direction, and the fuel gathered in the secondary mixing tank is pushed and pulled in a reciprocating mode, so that the fuel mixing is further promoted. The fuel mixing device generates vibration power by mechanical energy carried by the primary mixed fuel when entering the secondary mixing tank, and energy supply of special power equipment for the work of the vibration mixer is not needed, so that the energy consumption can be greatly saved.

Preferably, a fuel filler is provided on the filler port, and a pressure pump is provided on the fuel filler. The pressure pump can pressurize the fuel to be mixed in the fuel filler, so that the outflow speed of the fuel to be mixed is increased, the higher the flow speed is, the more turbulent flow is favorably generated, and the final improvement of the fuel mixing efficiency and the mixing effect are favorably realized.

Preferably, a discharge valve is arranged at the bottom of the secondary mixing tank, a liquid level sensor is arranged in the secondary mixing tank, and the discharge valve and the liquid level sensor are both electrically connected with a controller. The liquid level should be controlled in reasonable high in the secondary mixing jar, ensures that the fuel that sprays and go out can direct impact vibration blender, also can avoid the fuel of overfilling to produce great resistance, hinders vibration blender, sets up level sensor for this reason, when the mixed fuel reaches preset height in the secondary mixing jar, level sensor can in time detect to feedback signal to controller, then control the blow-off valve in time to open, so that will accomplish the fuel discharge of mixing. The liquid level of the mixed fuel can not overflow the impact plate of the vibration mixer all the time, and the impact plate can receive the direct impact of the fuel all the time to generate vibration power when the fuel is sprayed.

The invention has the beneficial effects that:

the fuel mixing efficiency is improved. The fuel mixing device can mix fuel through turbulence effect in the flowing process of the fuel, and the fuel can flow and mix at the same time, so that the fuel mixing efficiency can be improved.

The fuel mixing effect is improved. Use this fuel mixing arrangement, can make fuel carry out echelon through different mixed mode and mix in blending tank, the secondary blending tank, produce better fuel mixing effect.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of an operating state of the present invention.

In the figure, 1-mixing tank, 2-filling port, 3-fuel mixer, 4-air inlet, 5-rotating shaft, 6-helical blade, 7-turbulence lug, 8-fuel filler, 9-discharge valve, 10-secondary mixing tank, 11-pressure jet orifice, 12-hollow screw, 13-impact plate, 14-vibration spring, 15-middle shaft rod and 16-liquid level sensor.

Detailed Description

The invention is further illustrated by the following specific embodiments in conjunction with the accompanying drawings.

Example 1:

as shown in fig. 1 and 2, a fuel mixing device is disposed around a marine engine. The fuel mixing device comprises a mixing tank 1, wherein two filling ports 2 and an air inlet 4 are arranged on the mixing tank 1. The two filling ports 2 are symmetrically arranged, a fuel filler 8 is arranged on the filling ports 2, and a pressure pump is arranged on the fuel filler 8. Be equipped with fuel blender 3 in blending tank 1, fuel blender 3 includes pivot 5 and helical blade 6, pivot 5 is located 1 axial lines of blending tank, 5 tops of pivot are passed through the bearing and are rotated and connect at 1 tops of blending tank, 5 bottoms of pivot are passed through the bearing and are rotated and connect in 1 bottoms of blending tank, helical blade 6 spirals and fix on pivot 5, be dynamic seal structure between 6 edges of helical blade and 1 inner wall of blending tank, be equipped with the torrent on the fuel blender 3 and strengthen the structure. The turbulence strengthening structure is a turbulence lug 7, and the turbulence lug 7 is welded and fixed on the spiral surface of the spiral blade 6. The mixing tank 1 is in a round table shape with a big top and a small bottom, and the output end of the mixing tank 1 is positioned at the bottom end of the mixing tank 1. The fuel mixing device also comprises a secondary mixing tank 10, wherein the secondary mixing tank 10 is connected to the output end of the mixing tank 1, the secondary mixing tank 10 is communicated with the mixing tank 1 through a pressure jet hole 11, and a vibration mixer is arranged in the secondary mixing tank 10. The vibration mixer comprises a hollow screw 12, an impact plate 13 and a vibration spring 14, a middle shaft rod 15 is fixedly arranged on the axis position of the secondary mixing tank 10, two ends of the middle shaft rod 15 are respectively fixed on the top surface and the bottom surface of the secondary mixing tank 10, the hollow screw 12, the impact plate 13 and the vibration spring 14 are all slidably sleeved on the middle shaft rod 15, the impact plate 13 and the vibration spring 14 are respectively connected to two ends of the hollow screw 12, and the impact plate 13 is positioned at the input end of the secondary mixing tank 10 and corresponds to the position of the pressure jet hole 11. The bottom of the secondary mixing tank 10 is provided with a discharge valve 9, a floating ball type liquid level sensor 16 is arranged in the secondary mixing tank 10, and the discharge valve 9 and the liquid level sensor 16 are both electrically connected with a controller.

When the fuel mixing device works, two or more kinds of fuels to be mixed are injected from the filling port 2 and flow in a spiral flow passage formed by the spiral blade 6 and the inner wall of the mixing tank 1, and the turbulence lug 7 can enable the fuels to generate turbulence in the flowing process, so that the fuel mixing is promoted. The rotating shaft 5 is connected with an external driving device to obtain rotating power, and the helical blades 6 have a pushing effect on fuel, so that the fuel is accelerated and flows in a helical flow channel, turbulent flow motion is easier to occur, and the fuel is more favorably mixed. The pressurized fuel in the mixing tank 1 has a high speed when being output, the kinetic energy carried by the primary mixed fuel which is ejected from the pressure jet hole 11 at a high speed and enters the secondary mixing tank 10 can be continuously utilized, the primary mixed fuel impacts on the impact plate 13, the impact force is transmitted to the vibration spring 14 through the hollow screw 12 to force the vibration spring 14 to compress, after the vibration spring 14 is compressed to a certain degree and is enough to resist the impact force, the vibration spring 14 can rebound, and the hollow screw 12 and the impact plate 13 are circularly reciprocated in this way, so that the hollow screw 12 and the impact plate 13 form dynamic balance under the combined action of the fuel impact force and the elastic force of the vibration spring 14, the external expression is that the hollow screw 12 reciprocates along the axial direction, and the fuel collected in the secondary mixing tank 10 is pushed and pulled in a reciprocating. The trigger liquid level of the liquid level sensor 16 is set to be half of the depth of the secondary mixing tank 10, namely when the mixed fuel in the secondary mixing tank 10 reaches a half-full state, the liquid level sensor 16 is triggered, the liquid level sensor 16 sends a signal to the controller, the discharge valve 9 is opened in time, and the mixed fuel is discharged into a fuel tank of a ship. The discharge valve 9 is closed again 3 seconds after the liquid level falls below the level sensor 16.

Example 2:

the number of the filling ports 2 is three. The mixing tank is cylindrical, and the pitch of the helical blades is gradually reduced from the input end to the output end of the mixing tank. The rest is the same as example 1.

Claims

1. A fuel mixing device comprises a mixing tank (1), wherein the mixing tank (1) is a rotator, a filling port (2) and an air inlet (4) are arranged on the mixing tank (1), and is characterized in that a fuel mixer (3) is arranged in the mixing tank (1), the fuel mixer (3) comprises a rotating shaft (5) and a spiral blade (6), the rotating shaft (5) is rotatably connected onto the mixing tank (1), the spiral blade (6) is spirally fixed on the rotating shaft (5), a dynamic sealing structure is arranged between the edge of the spiral blade (6) and the inner wall of the mixing tank (1), a turbulence strengthening structure is arranged on the fuel mixer (3), the fuel mixing device further comprises a secondary mixing tank (10), the secondary mixing tank (10) is connected to the output end of the mixing tank (1), the secondary mixing tank (10) is communicated with the mixing tank (1) through a pressure jet hole (11), a vibration mixer is arranged in the secondary mixing tank (10), the vibration mixer comprises a hollow screw (12), an impact plate (13) and a vibration spring (14), a middle shaft rod (15) is fixedly arranged on the axis position of the secondary mixing tank (10), the hollow screw (12), the impact plate (13) and the vibration spring (14) are slidably sleeved on the middle shaft rod (15), the impact plate (13) and the vibration spring (14) are respectively connected to two ends of the hollow screw (12), and the impact plate (13) is located at the input end of the secondary mixing tank (10) and corresponds to the position of the pressure jet hole (11).

2. A fuel mixing device according to claim 1, wherein the turbulence-intensifying structure is a turbulence-disturbing bump (7), the turbulence-disturbing bump (7) being fixed to the helicoid of the helical blade (6).

3. A fuel mixing device according to claim 1, characterized in that the mixing pot (1) is in the shape of a circular truncated cone and that the output end of the mixing pot (1) is located at the smaller end of the mixing pot (1).

4. A fuel mixing device according to claim 1, wherein the mixing tank (1) is cylindrical and the pitch of the helical blades (6) decreases progressively from the inlet end to the outlet end of the mixing tank (1).

5. A fuel mixing device according to claim 2, characterized in that the turbulence protrusions (7) are welded to the helical blade (6).

6. A fuel mixing apparatus as claimed in claim 1, wherein the secondary mixing tank (10) is provided at its bottom with a discharge valve (9), the secondary mixing tank (10) is provided with a level sensor, and both the discharge valve (9) and the level sensor are electrically connected to a controller.

7. Fuel mixing apparatus according to any one of claims 1 to 6, characterized in that the filler opening (2) is provided with a fuel filler (8), the fuel filler (8) being provided with a pressure pump.