JPS6111516A - Turning spray nozzle having variable delivery rate - Google Patents

Abstract

PURPOSE:To allow the wider range of flow rate control by providing a movable member with a resilient means that biases an inlet toward contractive direction, said movable member being displaced in the direction of the inlet port expansion upon receiving feed liquid pressure. CONSTITUTION:When increasing spray amount, fuel oil is supplied at a high pressure. As the fuel oil pressures the pressurized part 34 of a slitter 18 via the intake port 44 of a flange 42, a movable member 14 is axially displaced toward the end of a spray nozzle 2 against the spring force of a spring 12, and the opening area of inlet 32a of a slit groove 32 is adjusted and expanded by the displaced distance of the movable member 14, and the volume of a vortex chamber 38 is also expanded. Because of this, the opening area of the inlet 32a is expanded, the flow coefficient is also increased, and as a result, the spray amount is increased. When reducing the spray amount, the delivery pressure is reduced. The movable member 14 is biased toward the rear end of the spray nozzle 2 to separate the end 16a from a stopper wall 22 to cause the opening area of the inlet 32a to be reduced. The volume of the vortex chamber 38 is also reduced to cause the flow coefficient to be reduced, and as a result, the spray amount is reduced due to the cross effect of the change of the fuel oil pressure and flow coefficient.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a variable discharge amount rotating spray nozzle, and in particular, the supply liquid pressure is changed by the discharge pressure of the liquid supply means, and the spray can be sprayed without deteriorating the spray condition. This invention relates to a variable discharge amount rotating jet nozzle that controls the flow rate over a wide range.

[Prior Art] As a characteristic of the swirling spray nozzle, once the spray amount is determined, the spray conditions such as the average spray particle size, spray pattern, and spray angle are determined at a constant level. A fuel pump, which is a constant pressure and metered liquid delivery means, is determined to fit the nozzle. As a result, the predetermined +IJi
i amount is supplied, and stable combustibility is maintained.

[Problems to be Solved by the Invention] By the way, in the conventional swirling spray nozzle, a predetermined amount of spray is supplied, but the spray flow rate is controlled to obtain different combustibility depending on the amount of heat required for each use. It was difficult to do so. That is, the fuel pump is driven and controlled to control the spray flow rate, the supply liquid pressure is changed by the discharge pressure of the fuel pump, and the spray flow rate is controlled in accordance with this supply liquid pressure.

However, if it is desired to obtain a flow rate ratio of 1:2, for example, the discharge pressure of the fuel pump needs to have a pressure fluctuation range of 1:4. For this reason, the load required to control the drive of the fuel pump system becomes large, causing a disadvantage that energy loss becomes large. Further, as the supply liquid pressure changes, the spray conditions such as the spray particle size and the spray angle of the fuel oil, which is the supply liquid, change. As a result, combustibility deteriorates, making it difficult to control the spray flow I over a wide range.

Furthermore, there is a bypass nozzle as a device that can control the spray flow rate. This bypass nozzle maintains a good spray state while controlling the supply liquid pressure in the swirl chamber connected to the ejection port by a flow rate control mechanism in the bypass circuit section. Therefore, in the bypass circuit section, it is necessary to operate the flow rate control mechanism with high precision. However, in order to operate this flow rate control mechanism with high precision, special control equipment is required, as well as accessory parts such as piping that make up the bypass circuit, making the structure complex and requiring maintenance and inspection. This has the disadvantage of being difficult and expensive.

Furthermore, in a spray nozzle with such a configuration, a good spray state can be maintained only when the variable flow rate range is 1=
3, and there was an inconvenience that the spray flow rate could not be controlled over a wide range.

[Object of the Invention] Therefore, the object of the present invention is to eliminate the above-mentioned disadvantages, change the supplied liquid pressure by the discharge pressure of the liquid feeding means, and further increase the flow coefficient by changing the opening area of the inlet. To provide a variable discharge amount swirling spray nozzle which can control the flow rate over a wide range by changing the flow rate, improves the controllability of the spray flow rate, has a simple configuration, and can maintain a good spray state.

[Means for Solving the Problems] In order to achieve this object, the present invention constitutes a nozzle by an outer body, a spindle-shaped inner body, and a moving body interposed between the two, and the moving body has a tip end thereof. A spout is provided in the part, and an inflow port is provided that expands and contracts depending on the positional relationship with the inner body as the movable body moves in the axial direction, and the movable body is provided with a pressure means for forcing the inflow port in a contraction direction, The present invention is characterized in that a pressure-receiving portion is provided which causes the movable body to move the inflow (21) in an expanding direction in response to supply liquid pressure.

[Function] By configuring this invention in this way, when it is desired to increase the spray flow rate, the liquid supply means is driven and controlled to increase the supply liquid pressure by the discharge pressure, and this supply liquid pressure is applied to the pressure receiving part. The moving body is moved in the direction of expanding the opening area of the inflow [1 and the volume of the swirl chamber, thereby changing the flow rate coefficient and increasing the spray flow rate. Since the supply liquid flows in the tangential direction of the swirl chamber through the inlet, the supply liquid swirls in the swirl chamber and is ejected from the spout in the form of mist. Next, when it is desired to reduce the spray flow rate, the liquid supply means is driven and controlled to lower the supply liquid pressure by the discharge pressure, and the movable body reduces the opening area of the inlet and the volume of the swirl chamber by the elastic means. direction, thereby changing the flow coefficient and reducing the spray flow rate.

In this way, the supply liquid pressure is changed by the discharge pressure of the liquid supply means, and the movable body is moved according to the supply liquid pressure.
I↓, as a result, the spray flow rate can be controlled over a wide range by changing the flow coefficient.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be specifically described in detail (7) based on the drawings.

1 to 4 show embodiments of this invention. This invention changes the supply fluid pressure of fuel, etc., and controls the flow rate of the fluid, such as fuel, by this fluid pressure. In order to facilitate understanding of this invention, the following formula is shown. In other words, the flow rate Q is expressed as Q=A-s-c-fT, Q: flow rate A: parameter S: flow path opening area C: flow coefficient P: supply liquid pressure, The flow rate Q is controlled by adjusting the opening surface ms of 1 to 8 and the supply liquid pressure P, and changing the flow rate coefficient C accordingly.

In the figure, 2 is a spray nozzle, 4 is an outer pod, and 16 is a spindle-shaped inner pod. The outer body 4 is formed into a cylindrical shape, and a tip 6N of the outer body 4,
An opening 8 is formed in the center of l. Further, a first stepped portion 10 is formed on the inner circumferential surface of the outer body 4, and one end of an annular spring 12 serving as a pressure means is locked to this first stepped portion 1°.

A moving body 1 is disposed between the outer body 4 and the inner body 6.
4 is interposed, and this moving body 14 consists of a slide 16 and a slitter 18. A jet 120 is formed at the tip 1 of the slide 1-16, which is the tip of the moving body 14. Also, the tip 16a of the slide 1-16 is disposed at the tip of the outer body 4. , the outer body 4
Movement of the movable body 14 is restricted by a stopper wall 22 at the tip. Further, a second stepped portion 24 is formed on the outer periphery of the rear end of this slide 16, and this second stepped portion 24 has a number:
L The other end of the spring I2 is locked. As a result, the moving body 14 is urged to reduce the inflow rl 32 a, which will be described later. (Indicated by the dashed line in Figure 2)
. A slitter 18 is screwed onto the rear end of the slide 16, and an O-ring 26 is provided on the outer periphery of the slitter 18 to prevent leakage of fuel oil, which is supplied hydraulic pressure, and comes into contact with the inner peripheral surface of the outer body 4. It is installed.

A communication hole 28 is formed in the intermediate portion 18b of the slitter 18 to form a flow path for fuel oil.

Further, this slitter 1)) is formed with communication grooves 30, 30 that communicate with the communication hole 28 and extend in the axial direction. The tip 6NA of this communication groove 30.30 communicates with a slit groove 32.32 which is an inflow path for fuel and oil oriented in the 18-line direction of the swirl chamber 38, which will be described later. At this time,
The open 1-1 part on the spiral chamber 38 side of Surin 11 seedling 32.32 is defined as 1132a, 32a. Further, the rear end surface of the slitter 18 is defined as a receiving portion 34.

Inside the slitter 18, a protruding rod 3G of the inner body 6 is installed. This rod 36 is arranged at the axial center of the spray nozzle 2, and this rod 36
The distal end portion 36a is provided facing toward the opening 8 side of the outer body 4. A spiral chamber 38 is formed at the center of the tip of the outer body 2 by the tip 36a of the rod 36 and the tip 16a of the slide 16.

On the other hand, when the tod 36 is installed in I11, an annular introduction passage 40 for supplying fuel oil is formed between the rod 36 and the slitter 18, and this introduction passage 40 It
It communicates with the continuous 1ffl hole 28.

A flange portion 42 is formed at the rear end of the inner body 6, and the outer periphery of the flange portion 42 is screwed onto the outer body 4. Further, a plurality of introduction holes 44 are provided in the flange portion A2 in the axial direction at equal intervals around the circumference.

The side surface of the pressure receiving part 34 of the slitter 18 of the flange part 42 is an inner part wall 46, and between this inner part wall 46 and the pressure receiving part 34 of the slitter 1B, when the movable body 14 is moved by the supplied liquid pressure, A space 48 is provided. Furthermore, a filter 50 is attached to the rear end of the inner body 6. At the rear end of the spray nozzle 2,
Although not shown, a fuel pipe is connected to a fuel pump serving as a liquid supply means.

Next, the operation of this embodiment will be explained.

When increasing the spray flow rate, the fuel is fed at high pressure by the fuel pump, passes through the filter 50, and reaches the rear end side of the inner body [j]. This fuel oil
Since the moving body 14 presses the pressure receiving part 34 of the slitter 18 through the introduction hole 44 of the spray nozzle 2, the movable body 14 resists the elastic force of the spring 12 and moves forward in the axial direction of the spray nozzle 2. Move to lil side.

Then, the fuel 111 oil fills the space 48 and reaches the ζ slit 1 groove 32 through the introduced oil 1/340, the communication hole 28, and the communication groove 30.

In this slit groove 32, the movable body 14 moves in accordance with the fuel *1 oil pressure, so the inflow hole 3 of the slit groove 32
The open area 28 is adjusted and expanded by the moving distance of the moving body 14, and the volume of the swirl chamber 38 is also expanded. At the highest pressure, the tip of the moving body 14 comes into contact with the stopper wall 22, that is, the tip 16a of the slide 16 touches the outer body 4.
The movable body 14 stops when it comes into contact with the tip of the (see Fig. 1.2).

As a result, the opening area of the inlet 32a is expanded, and the flow rate coefficient changes greatly, resulting in an increase in the spray flow rate. Then, the fuel oil flows from the slit groove 32 to the 411S chamber 3.
8 in the tangential direction. In this spiral chamber 38,
The fuel oil is subjected to swirling action and is ejected in a mist form from the jets 1-18. At this time, fuel oil attempts to enter the sliding portion between the movable body 14 and the outer body 4 due to the fuel oil pressure, but this fuel oil is blocked by the O-ring 26.

When reducing the spray flow rate, the fuel pump is driven and controlled to lower the output pressure (thereby, the pressure acting on the fuel oil is lowered. As a result, the movable body 14 is moved to the spray nozzle 2 by the elastic force of the spring 12. Slide 16 is pressed against the rear wheel side.
The tip portion 16a of the slitter 18 moves away from the stopper wall 22, and the pressure receiving portion 34 of the slitter 18 approaches the inner wall 46 to reduce the space 48. At this time, due to the movement of the moving body 14, the opening area of the inlet 32a is reduced, and
The volume of the volute chamber 38 is also reduced (as shown by the dashed line in Fig. 2).
As a result, the flow coefficient becomes small, and the spray flow rate can be reduced by the synergistic effect of the change in fuel oil pressure and the flow coefficient. In addition, it is possible to maintain a good spray condition and obtain stable combustibility.

Furthermore, since the positions of the spray nozzles 11 and 120 move back and forth in accordance with the magnitude of the spray flow rate, the frame boulder 54 having a plurality of spray nozzles 24 and 2 is installed as shown in FIG. When a 'ζ hurly' is formed, even if the spray pressure is low, the change in the spray angle α can be prevented as much as possible, and the flame 1 can be spread near the inner circumferential surface of the frame boulder 54 to the exchange flame f. The air is effectively supplied from the slit 52 to help disturb the air-fuel mixture and improve combustibility.

When controlling the spray flow rate in this way, for example, if the fuel pump is driven and controlled to change the discharge pressure in the range of 1=2, the movable body 14 of the spray nozzle 2 is caused to slide in accordance with the supply fluid pressure P, It is possible to change the opening area S of the inlet 32a, which is the opening area of the flow path, and the volume of the swirl chamber 38, thereby changing the flow coefficient C to 1 linear, and the flow coefficient C and the supply liquid pressure P. The spray flow rate ratio is controlled to 1:10 by the synergistic effect of the change. In other words, it becomes possible to control the spray flow rate over a wide range.

It goes without saying that the present invention is not limited to the above-mentioned embodiments and can be modified in various ways.

For example, the movable body 14 is connected to the slide 16 and the slick 18.
Although it is constructed from a silk composite body, it is possible to integrate this transfer body 14 into one body.

Furthermore, although the spray nozzle 2 of the present invention was used in a combustor,
It is also possible to use it with a spray device.

[Effects of the Invention] As is clear from the detailed description below, according to the present invention,
The supplied liquid pressure is changed by the discharge pressure of the liquid feeding means, and due to the synergistic effect with the flow rate coefficient, it is possible to control the flow rate over a wide range, maintain a good spray state, and improve combustibility.

In addition, the spray flow rate can be controlled (just by adjusting the Jt liquid supply pressure,
Extremely good controllability.

In addition, the volume and shape of the spray nozzle body are almost the same as conventional ones, and there is no need for special control equipment or complicated piping structures, so the structure is simple and manufacturing costs can be reduced. Inspection becomes easier. Furthermore, it is easy to assemble into the combustor.

Furthermore, since the spray flow rate is controlled by the synergistic effect of the supply liquid pressure and the flow rate coefficient, it contributes to energy savings compared to conventional on/off control, and also minimizes the generation of harmful gases, soot, and other products. , which is advantageous in terms of environmental hygiene.

[Brief explanation of the drawing]

Figures 1 to 4 show examples of this invention. Figure 1 is a half-sectional view of the spray nozzle, Figure 2 is an enlarged half-sectional view of the main part of the spray nozzle, and Figure 3 is the same as in Figure 1. Fig. 4 is an enlarged cross-sectional view taken along the = ■ line, and Fig. 4 is a schematic cross-sectional view of the spray nozzle frame holder attached thereto. In the figure, 2 is a spray nozzle, 4 is an outer body, 6 is an inner body, 14 is a moving body, 32 is a slit groove, 32
a is an inlet, 36 is a rod, 38 is a swirl chamber, and 48
is the spatial part.

Claims (1)

[Claims] A nozzle is constituted by an outer body, a spindle-shaped inner body, and a moving body interposed between the two, and the moving body is provided with a spout at its tip, and the positional relationship with the inner body is adjusted by axial movement of the moving body. an inlet that expands and contracts by the movable body, and the movable body is provided with a pressure means for biasing the inflow port in a direction of contraction, and the movable body receives supply fluid pressure to move the inlet in the direction of expansion. A variable discharge amount rotating spray nozzle characterized by being provided with a pressure receiving part.