WO2018161567A1 - Automatically adjustable injector - Google Patents
Automatically adjustable injector Download PDFInfo
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- WO2018161567A1 WO2018161567A1 PCT/CN2017/106084 CN2017106084W WO2018161567A1 WO 2018161567 A1 WO2018161567 A1 WO 2018161567A1 CN 2017106084 W CN2017106084 W CN 2017106084W WO 2018161567 A1 WO2018161567 A1 WO 2018161567A1
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- WIPO (PCT)
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- nozzle
- retractor
- injector
- bellows
- needle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
- B05B12/087—Flow or presssure regulators, i.e. non-electric unitary devices comprising a sensing element, e.g. a piston or a membrane, and a controlling element, e.g. a valve
- B05B12/088—Flow or presssure regulators, i.e. non-electric unitary devices comprising a sensing element, e.g. a piston or a membrane, and a controlling element, e.g. a valve the sensing element being a flexible member, e.g. membrane, diaphragm, bellows
Definitions
- the present invention relates to the field of injector technology, and more particularly to an automatically adjustable injector.
- the injector is a widely used fluid machine that uses the jet of working fluid to achieve energy conversion.
- the ejector is widely used in the fields of gas extraction, waste heat recovery and mixed heating due to its simple structure, low cost and convenient operation and maintenance.
- the current design of the injector is generally for a fixed working condition. Once the fixed working condition is deviated, the stability of the injector is rapidly decreased; since the structure of the injector is fixed, the range of parameter adjustment is extremely narrow, so The efficiency of the injector can be greatly reduced, and even the use cannot be continued.
- a desalination plant due to changes in system load, it is necessary to change the outlet flow rate of the injector to a large extent; in addition, in actual industrial production, when the parameters of external primary fluid pressure, working fluid, etc. change, It is a large change in the flow pressure parameter that will cause a large drop in the performance of the injector, which suggests how to achieve the adjustable performance of the injector in a wide range to meet the needs of a variety of operating conditions. .
- the technical problem to be solved by the present application is that the currently designed injector can only be used in a fixed working condition. Once the primary flow pressure changes, the injection efficiency of the injector will drop greatly, and even the injector cannot be used. To solve this problem, the present application will design a novel nozzle position adjustable The auto-tuning NXP ejector and the Auto-tuning AR ejector solve the problem that the injector has a severe drop in efficiency when the primary flow pressure changes greatly.
- the present invention provides an automatically adjustable injector comprising a primary flow inlet, a mixing chamber and a diffusion chamber, which are sequentially connected along an axis, and a secondary chamber is disposed below the mixing chamber.
- a flow inlet the secondary flow inlet opens into the mixing chamber, the nozzle traverses through the primary flow inlet into the mixing chamber, and the circular throat of the nozzle is on the same axis as the tapered outlet of the mixing chamber;
- a retractor is provided, the retractor being sequentially connected to the primary flow inlet, the mixing chamber and the diffusion chamber along an axis, and the retractor is used to control the movement of the nozzle.
- the retractor includes a bellows or other device that can change in length according to a change in pressure in the injector, and the bellows is externally sheathed with a spring for adjusting the elastic coefficient of the retractor so that It can be stretched to the appropriate position according to the size of one stream.
- the retractor is used to control the movement of the nozzle to achieve adjustable nozzle position.
- the retractor is used to control the movement of the nozzle to achieve a nozzle throat ratio adjustable.
- the bellows of the retractor are two, which are respectively disposed on the upper and lower sides of the inlet end of the nozzle, and when the primary flow pressure of the injector increases, the pressure on the periphery of the retractor increases.
- the large, bellows-shaped retractor is deformed and will be elongated, and the injector nozzle exit position NXP is reduced; when the primary flow pressure of the injector is reduced, the bellows-shaped retractor is deformed and will be shortened, and the injector NXP Increase
- the appropriate elastic modulus is set for the retractor so that the nozzle of the injector can be in an optimal position regardless of the change of the primary flow pressure, that is, the NXP of the injector always maintains an optimum value corresponding to the primary flow pressure. Thereby the ejector coefficient of the injector is maintained at a higher value.
- a corrugated pipe is further added to the corresponding position of each bellows of the retractor, and a closed space formed by two layers of bellows is formed on the upper and lower sides of the inlet end of the nozzle, and the flow pressure is increased once.
- the bellows of the bellows is deformed and will be elongated, and the ejector NXP is reduced.
- the primary flow pressure of the ejector is reduced, the expansion of the bellows shaped like a bellows will be shortened, and the ejector NXP is increased. .
- the retractor introduces a back pressure or a secondary flow pressure as feedback, so that the adjustment of the injector NXP is more precise.
- the bellows of the retractor is disposed at the inner side of the inlet end of the nozzle, and the inlet end of the retractor is connected to the primary inlet end, and the outlet end of the retractor The needle is connected, and the needle is coupled to the retractor, and the spray moves as the retractor moves.
- the needle is connected to the nozzle through the needle holder, and the needle holder functions to fix the needle to move only to the left and right, and cannot swing up and down, and the needle holder does not affect the flow of the primary flow.
- the tip of the needle is a cone. As the needle moves to the right, the area of the nozzle blocking the throat of the spray group is larger, resulting in a smaller nozzle, thereby changing the throat ratio.
- the bellows of the retractor are two, respectively connected to the needle.
- the bellows of the retractor are two groups, each group comprising two corrugated tubes formed in a closed space, and the two sets of bellows are respectively connected with the needle.
- the pressure of the retractor is increased, and the shape of the bellows of the bellows is deformed to be elongated, and the needle is moved forward to reduce the area of the throat of the injector nozzle, thereby The nozzle throat is larger than AR; otherwise, the AR is decreased;
- the AR of the device always maintains an optimum value corresponding to the primary flow pressure, so that the ejector coefficient of the injector is maintained at a higher value.
- the invention can automatically adjust the size of the injector NXP or AR by a single stream size change, improve the performance of the injector, and make the injector have good performance under different working conditions.
- the control device of the invention is safe and reliable, has a simple structure and low cost.
- the design scheme of the Auto-tuningejector proposed by the invention achieves the purpose of the adaptive control of the injector, and can automatically adjust the injectors NXP and AR when the primary flow rate of the injector changes within a certain range, so that the performance is always at the most Excellent state.
- Figure 1 is a structural view of a conventional injector
- Figure 2 is an embodiment of the nozzle position adjustable injector (Auto-tuningNXPejector);
- Figure 3 is an embodiment of the nozzle position adjustable injector (Auto-tuningNXPejector);
- Figure 4 is a throat-adjustable injector (Auto-tuning ARejector);
- Figure 5 is a force analysis diagram of the retractor
- the conventional ejector structure is shown in Figure 1.
- the ejector works.
- the ejector consists of a nozzle (including nozzle throat 3 and nozzle outlet 4), a suction chamber 2, a mixing chamber (including an equal-area mixing section 7 and the like).
- the pressure mixing section 5) and the diffusion chamber 8 are composed of four parts.
- the working principle is that the primary steam, that is, the power steam, enters the nozzle through the primary inlet 1 to perform adiabatic expansion, and the supersonic fluid is formed at the nozzle outlet 4 through the nozzle throat 3, and is formed at a high speed when the supersonic fluid flows through the suction chamber 2.
- the low pressure will drive the ejector movement, and the secondary fluid moves into the suction chamber 2 through the secondary flow inlet 6 along the axial direction of the ejector, and the two fluids are mixed in the mixing chamber equal pressure mixing section 5 and the equal area mixing section 7, and The resulting mixed fluid falls below the speed of sound, and within the diffusion chamber 8, the velocity of the mixed fluid is further reduced and the pressure rises to the parameters required to remove the fluid.
- the ratio of the ejector fluid to the mass flow rate of the primary fluid becomes the ejector coefficient, which is the main indicator for measuring the performance of the ejector.
- the injectors are generally not adjustable for fixed operating conditions.
- the present application proposes an adjustable injector.
- This adjustable injector solution includes both adjustable nozzle position and adjustable throat ratio. These two forms can be used alone or together.
- the invention adopts the principle that the bellows can be flexibly deformed by the side force of the bellows. Deform the bellows to control the position of the injector nozzle or the injector Throat mouth ratio.
- the adjustable injector of the present patent application adds adjustment components to the conventional injector to achieve two adjustment modes.
- An automatically adjustable injector comprising a primary inlet 1, a nozzle (including a nozzle throat and a nozzle outlet), a suction chamber 2, a secondary inlet 6, a mixing chamber (including an isobaric mixing section 5 and The equal-area mixing section 7), the diffusion chamber 8, the needle holder 14, and a retractor (hereinafter referred to as a retractor) that controls the nozzle or the needle to move left and right.
- the primary inlet 1, the mixing chamber and the diffusion chamber 8 are sequentially connected along an axis, and the secondary inlet 6 is placed below the mixing chamber, and is introduced into the mixing chamber, and the nozzle passes through the primary inlet 1 into the mixing chamber, and the nozzle The round throat is on the same axis as the conical outlet of the mixing chamber.
- the retractor is placed after the primary inflow port 1 and before the nozzle to achieve the purpose of controlling the movement of the nozzle or the needle.
- the retractor is sequentially linked along the axis with the primary flow inlet, the mixing chamber, and
- the retractor is constructed as follows: a bellows or other device that can change its length according to the change of the pressure inside the pipe is selected, and a spring is arranged on the outside to adjust the elastic coefficient of the retractor so that it can be expanded according to the size of the primary flow. s position.
- an injector having an adjustable nozzle position is provided. As shown in FIG. 2, when the position of the nozzle is adjustable, the bellows of the first retractor 9 are two, respectively disposed in The upper and lower sides of the inlet end of the nozzle.
- the nozzle of the injector can be in an optimal position regardless of the change of the primary flow pressure, that is, the NXP of the injector always maintains the optimum corresponding to the primary flow pressure.
- the value is such that the ejector's ejector coefficient remains at a higher value.
- the second retractor 11 is a bellows in the bellows of the retractor of FIG. 2 to form a closed space.
- the two layers of bellows are in the conduit 10 and the introduced pressure shown in the figures can be secondary flow pressure, back pressure or a constant pressure.
- the primary flow pressure is increased, the bellows of the bellows is deformed and will be elongated, and the injector NXP is reduced; when the primary flow pressure of the injector is reduced, the shape of the bellows of the bellows is deformed and shortened.
- the injector NXP is increased.
- the advantage of this structure of the injector compared to the injector shown in Figure 2 is that the back pressure or secondary flow pressure can be introduced as feedback, making the adjustment of the NXP more precise.
- the throat is more adjustable than the ejector, as shown in FIG. 4, the bellows of the third retractor 12 are two groups, each group comprising two corrugated tubes formed in a closed space. The two sets of bellows are connected to the needles respectively.
- the AR of the injector can always maintain the optimum value corresponding to the primary flow pressure regardless of the change of the primary flow pressure, so that the ejector coefficient of the injector is kept higher. Value.
- the function of the needle holder is that the fixed needle can only move left and right, cannot swing up and down, and the needle holder 14 does not affect the flow of the primary flow.
- the needle 13 is coupled to the retractor.
- the spray moves as the retractor moves.
- the tip of the needle is a cone. As the needle moves to the right, the larger the area of the throat that the needle blocks the spray, the smaller the nozzle, which changes the throat ratio.
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- Jet Pumps And Other Pumps (AREA)
Abstract
An automatically adjustable injector, the injector comprising: a primary flow inlet (1), a mixing chamber and a diffusion chamber (8), which are connected in sequence along an axis; a secondary flow inlet (6) is arranged at a lower side of the mixing chamber, and the secondary flow inlet (6) leads into the mixing chamber; a nozzle transverses across the primary flow inlet (1) to enter the mixing chamber, wherein a circular throat part of the nozzle and a conical outlet of the mixing chamber are located on the same axis; retractors (9, 11, 12) are arranged behind the primary flow inlet (1) and in front of the nozzle, the retractors (9, 11, 12) being connected to the primary flow inlet (1), the mixing chamber and the diffusion chamber (8) in sequence along an axis, and a retractor being used for controlling the movement of the nozzle. The injector may automatically adjust the size of the injector NXP or AR simply by means of changing the size of the primary flow so as to improve the performance of the injector such that the injector performs well under different working conditions.
Description
本发明涉及喷射器技术领域，特别是涉及一种可自动调节的喷射器。The present invention relates to the field of injector technology, and more particularly to an automatically adjustable injector.
目前，喷射器是一种应用广泛的流体机械，他利用工作流体的射流来实现能量的转换。喷射器以其结构简单、造价低廉以及操作和维修方便的特点，广泛应用于抽除气体、废热回收和混合加热等领域。At present, the injector is a widely used fluid machine that uses the jet of working fluid to achieve energy conversion. The ejector is widely used in the fields of gas extraction, waste heat recovery and mixed heating due to its simple structure, low cost and convenient operation and maintenance.
喷射器依靠流体间的相互碰撞来传递能量，其内部的混合过程非常复杂，因此对于喷射器的研究多采用经验公式。近些年，使用CFD软件来模拟喷射器内部流体流动的仿真实验越来越受到重视。但由于实验的难度较大，因此人们对喷射器内部流体的流动了解也相对较少。The ejector relies on the collision of fluids to transfer energy, and the internal mixing process is very complicated. Therefore, empirical formulas are often used for the study of the ejector. In recent years, simulation experiments using CFD software to simulate fluid flow inside an injector have received increasing attention. However, due to the difficulty of the experiment, people have relatively little understanding of the fluid flow inside the injector.
由于上述原因，所以目前喷射器的设计一般是针对固定工况，一旦偏离固定工况，喷射器的稳定性急速下降；由于喷射器的结构是固定的，导致其参数调节的范围极窄，所以喷射器的效率会发生大幅度的下降，甚至导致无法继续使用。例如，在海水淡化装置中，由于***负荷的变化，需要较大幅度的改变喷射器的出口流量；另外，在实际工业生产中，外部一次流流体的压力、工质等参数发生变化时，特别是一次流压力这一参数发生较大幅度的变化将导致喷射器性能发生大幅度的下跌，这就提出了如何较宽范围内实现喷射器的可调节的性能，以满足多种工况的需求。For the above reasons, the current design of the injector is generally for a fixed working condition. Once the fixed working condition is deviated, the stability of the injector is rapidly decreased; since the structure of the injector is fixed, the range of parameter adjustment is extremely narrow, so The efficiency of the injector can be greatly reduced, and even the use cannot be continued. For example, in a desalination plant, due to changes in system load, it is necessary to change the outlet flow rate of the injector to a large extent; in addition, in actual industrial production, when the parameters of external primary fluid pressure, working fluid, etc. change, It is a large change in the flow pressure parameter that will cause a large drop in the performance of the injector, which suggests how to achieve the adjustable performance of the injector in a wide range to meet the needs of a variety of operating conditions. .
本申请所要解决的技术问题：目前设计好的喷射器只能用于固定工况，一旦一次流压力发生变化时，喷射器的喷射效率将发生大幅度的下滑，甚至导致喷射器无法使用。为解决这一难题，本申请将设计一种新型的喷嘴位置可调的
喷射器(Auto-tuning NXP ejector)及喉嘴比可调的喷射器(Auto-tuning AR ejector)，以解决喷射器在一次流压力发生较大变化时效率下降严重的问题。The technical problem to be solved by the present application is that the currently designed injector can only be used in a fixed working condition. Once the primary flow pressure changes, the injection efficiency of the injector will drop greatly, and even the injector cannot be used. To solve this problem, the present application will design a novel nozzle position adjustable
The auto-tuning NXP ejector and the Auto-tuning AR ejector solve the problem that the injector has a severe drop in efficiency when the primary flow pressure changes greatly.
发明内容Summary of the invention
为了解决现有技术的不足，本发明提供了一种可自动调节的喷射器，所述喷射器包括依次沿轴线连接的一次流入口、混合室和扩散室，所述混合室下方设置有二次流入口，所述二次流入口通入混合室内，喷嘴横穿过一次流入口进入混合室，且喷嘴的圆形喉部与混合室锥形出口处于同一轴线；In order to solve the deficiencies of the prior art, the present invention provides an automatically adjustable injector comprising a primary flow inlet, a mixing chamber and a diffusion chamber, which are sequentially connected along an axis, and a secondary chamber is disposed below the mixing chamber. a flow inlet, the secondary flow inlet opens into the mixing chamber, the nozzle traverses through the primary flow inlet into the mixing chamber, and the circular throat of the nozzle is on the same axis as the tapered outlet of the mixing chamber;
所述一次流入口后且喷嘴之前设置有伸缩器，所述伸缩器与一次流入口、混合室和扩散室依次沿轴线连接，所述伸缩器用于控制喷嘴的运动。After the primary inflow port and before the nozzle, a retractor is provided, the retractor being sequentially connected to the primary flow inlet, the mixing chamber and the diffusion chamber along an axis, and the retractor is used to control the movement of the nozzle.
进一步的，所述伸缩器包括波纹管或者其它可根据喷射器内压力发生变化而长度发生变化的器材，所述波纹管外部套以弹簧，所述弹簧用于调节伸缩器的弹性系数，使之可以根据一次流大小而伸缩到合适的位置。Further, the retractor includes a bellows or other device that can change in length according to a change in pressure in the injector, and the bellows is externally sheathed with a spring for adjusting the elastic coefficient of the retractor so that It can be stretched to the appropriate position according to the size of one stream.
进一步的，所述伸缩器用于控制喷嘴的运动实现喷嘴位置可调。Further, the retractor is used to control the movement of the nozzle to achieve adjustable nozzle position.
进一步的，所述伸缩器用于控制喷嘴的运动实现喷嘴喉嘴比可调。Further, the retractor is used to control the movement of the nozzle to achieve a nozzle throat ratio adjustable.
进一步的，在实现喷嘴位置可调时，所述伸缩器的波纹管为两个，分别设置在喷嘴的入口端的上下两侧，当喷射器一次流压力增大时，伸缩器***所受压力增大，形如波纹管的伸缩器发生形变，将伸长，喷射器喷嘴出口位置NXP减小；当喷射器一次流压力减小时，形如波纹管的伸缩器发生形变，将缩短，喷射器NXP增大；Further, when the position of the nozzle is adjustable, the bellows of the retractor are two, which are respectively disposed on the upper and lower sides of the inlet end of the nozzle, and when the primary flow pressure of the injector increases, the pressure on the periphery of the retractor increases. The large, bellows-shaped retractor is deformed and will be elongated, and the injector nozzle exit position NXP is reduced; when the primary flow pressure of the injector is reduced, the bellows-shaped retractor is deformed and will be shortened, and the injector NXP Increase
给伸缩器设置合适的弹性系数，使得无论一次流压力发生何种变化，喷射器的喷嘴都能处于一个最优的位置，即喷射器的NXP始终保持对应于该一次流压力的最优值，从而使得喷射器的引射系数保持一个较高的值。
The appropriate elastic modulus is set for the retractor so that the nozzle of the injector can be in an optimal position regardless of the change of the primary flow pressure, that is, the NXP of the injector always maintains an optimum value corresponding to the primary flow pressure. Thereby the ejector coefficient of the injector is maintained at a higher value.
进一步的，所述伸缩器的每个波纹管相对应的位置再增加一层波纹管，在喷嘴的入口端的上下两侧分别形成一个由两层波纹管形成的密闭的空间，当一次流压力增大时，形如波纹管的伸缩器发生形变，将伸长，喷射器NXP减小；当喷射器一次流压力减小时，形如波纹管的伸缩器发生形变，将缩短，喷射器NXP增大。Further, a corrugated pipe is further added to the corresponding position of each bellows of the retractor, and a closed space formed by two layers of bellows is formed on the upper and lower sides of the inlet end of the nozzle, and the flow pressure is increased once. When large, the bellows of the bellows is deformed and will be elongated, and the ejector NXP is reduced. When the primary flow pressure of the ejector is reduced, the expansion of the bellows shaped like a bellows will be shortened, and the ejector NXP is increased. .
进一步的，所述伸缩器引入背压或者二次流压力为反馈，使得喷射器NXP的调节更加精准。Further, the retractor introduces a back pressure or a secondary flow pressure as feedback, so that the adjustment of the injector NXP is more precise.
进一步的，所述伸缩器用于控制喷嘴的运动实现喷嘴喉嘴比可调时，所述伸缩器的波纹管设置在喷嘴的入口端的内侧，伸缩器入口端连接一次流入口端，伸缩器出口端连接喷针，所述喷针与伸缩器连接在一起，喷着随着伸缩器运动而运动。Further, when the retractor is used to control the movement of the nozzle to realize that the nozzle throat ratio is adjustable, the bellows of the retractor is disposed at the inner side of the inlet end of the nozzle, and the inlet end of the retractor is connected to the primary inlet end, and the outlet end of the retractor The needle is connected, and the needle is coupled to the retractor, and the spray moves as the retractor moves.
进一步的，所述喷针通过喷针支架与喷嘴相连，所述喷针支架的作用是固定喷针只能左右移动，不能够上下摆动，并且喷针支架不影响一次流的流动。Further, the needle is connected to the nozzle through the needle holder, and the needle holder functions to fix the needle to move only to the left and right, and cannot swing up and down, and the needle holder does not affect the flow of the primary flow.
进一步的，所述喷针的顶端是一个圆锥体，随着喷针向右移动，喷针阻塞喷组喉部的面积越大，导致喷嘴越小，从而改变了喉嘴比。Further, the tip of the needle is a cone. As the needle moves to the right, the area of the nozzle blocking the throat of the spray group is larger, resulting in a smaller nozzle, thereby changing the throat ratio.
进一步的，所述伸缩器的波纹管为两个，分别与喷针相连。Further, the bellows of the retractor are two, respectively connected to the needle.
进一步的，所述伸缩器的波纹管为两组，每组包括形成的密闭的空间两个波纹管，两组波纹管分别与喷针相连。Further, the bellows of the retractor are two groups, each group comprising two corrugated tubes formed in a closed space, and the two sets of bellows are respectively connected with the needle.
进一步的，当喷射器一次流压力增大时，伸缩器所受压力增大，形如波纹管的伸缩器发生形变将伸长，喷针前移，减小喷射器喷嘴喉部的面积，从而喷嘴喉嘴比AR增大；反之，AR减小；Further, when the primary flow pressure of the injector is increased, the pressure of the retractor is increased, and the shape of the bellows of the bellows is deformed to be elongated, and the needle is moved forward to reduce the area of the throat of the injector nozzle, thereby The nozzle throat is larger than AR; otherwise, the AR is decreased;
给伸缩器设置合适的弹性系数，使得无论一次流压力发生何种变化，喷射
器的AR始终保持对应于该一次流压力的最优值，从而使得喷射器的引射系数保持一个较高的值。Set the appropriate spring constant for the retractor so that no matter what changes in the primary flow pressure, the injection
The AR of the device always maintains an optimum value corresponding to the primary flow pressure, so that the ejector coefficient of the injector is maintained at a higher value.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
本发明可在简单的通过一次流大小的变换自动调节喷射器NXP或者AR的大小，改善喷射器的性能，使喷射器在处于不同的工况下都具有良好的性能。The invention can automatically adjust the size of the injector NXP or AR by a single stream size change, improve the performance of the injector, and make the injector have good performance under different working conditions.
本发明这种控制装置安全可靠，结构简单，成本低廉。The control device of the invention is safe and reliable, has a simple structure and low cost.
本发明所提出的Auto-tuningejector的设计方案达到了喷射器自适应控制的目的，可使喷射器一次流流量在一定范围内发生变化时，自动调节喷射器NXP和AR，使之时刻处于性能最优的状态。The design scheme of the Auto-tuningejector proposed by the invention achieves the purpose of the adaptive control of the injector, and can automatically adjust the injectors NXP and AR when the primary flow rate of the injector changes within a certain range, so that the performance is always at the most Excellent state.
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。The accompanying drawings, which are incorporated in the claims of the claims
图1为传统喷射器结构图；Figure 1 is a structural view of a conventional injector;
图2为实施例子1喷嘴位置可调的喷射器(Auto-tuningNXPejector)；Figure 2 is an embodiment of the nozzle position adjustable injector (Auto-tuningNXPejector);
图3为实施例子2喷嘴位置可调的喷射器(Auto-tuningNXPejector)；Figure 3 is an embodiment of the nozzle position adjustable injector (Auto-tuningNXPejector);
图4为喉嘴比可调的喷射器(Auto-tuningARejector)；Figure 4 is a throat-adjustable injector (Auto-tuning ARejector);
图5为伸缩器的受力分析图；Figure 5 is a force analysis diagram of the retractor;
其中，1.一次流入口，2.吸入室，3.喷嘴喉部，4.喷嘴出口，5.等压混合段，6.二次流入口，7.等面积混合段，8.扩散室，9.第一伸缩器，10.导管，11.第二伸缩器，12.第三伸缩器，13.喷针，14，喷针支架。Among them, 1. one inlet, 2. suction chamber, 3. nozzle throat, 4. nozzle outlet, 5. isobaric mixing section, 6. secondary inlet, 7. equal area mixing section, 8. diffusion chamber, 9. First retractor, 10. Catheter, 11. Second retractor, 12. Third retractor, 13. Needle, 14, Needle holder.
应该指出，以下详细说明都是例示性的，旨在对本申请提供进一步的说明。
除非另有指明，本文使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。It should be noted that the following detailed description is illustrative and is intended to provide a further description of the application.
All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise indicated.
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。It is to be noted that the terminology used herein is for the purpose of describing particular embodiments, and is not intended to limit the exemplary embodiments. As used herein, the singular " " " " " " There are features, steps, operations, devices, components, and/or combinations thereof.
传统喷射器结构如图1所示，喷射器工作原理：一般来说，喷射器由喷嘴(包括喷嘴喉部3与喷嘴出口4)、吸入室2、混合室(包括等面积混合段7和等压混合段5)以及扩散室8四部分组成。其工作原理为一次流蒸汽即动力蒸汽通过一次流入口1进入喷嘴进行绝热膨胀，经过喷嘴喉部3在喷嘴出口4处形成超音速流体，在超音速流体流经吸入室2时由于高速形成的低压将带动喷射器运动，而二次流体通过二次流入口6进入吸入室2沿喷射器轴向运动，在混合室等压混合段5及等面积混合段7内两股流体相混合，并且形成的混合流体降到音速以下，在扩散室8内，混合流体的速度进一步降低，压力升高达到排除流体所需参数。引射流体与一次流体质量流量的比值成为引射系数，其为衡量喷射器性能优劣的主要指标。The conventional ejector structure is shown in Figure 1. The ejector works. In general, the ejector consists of a nozzle (including nozzle throat 3 and nozzle outlet 4), a suction chamber 2, a mixing chamber (including an equal-area mixing section 7 and the like). The pressure mixing section 5) and the diffusion chamber 8 are composed of four parts. The working principle is that the primary steam, that is, the power steam, enters the nozzle through the primary inlet 1 to perform adiabatic expansion, and the supersonic fluid is formed at the nozzle outlet 4 through the nozzle throat 3, and is formed at a high speed when the supersonic fluid flows through the suction chamber 2. The low pressure will drive the ejector movement, and the secondary fluid moves into the suction chamber 2 through the secondary flow inlet 6 along the axial direction of the ejector, and the two fluids are mixed in the mixing chamber equal pressure mixing section 5 and the equal area mixing section 7, and The resulting mixed fluid falls below the speed of sound, and within the diffusion chamber 8, the velocity of the mixed fluid is further reduced and the pressure rises to the parameters required to remove the fluid. The ratio of the ejector fluid to the mass flow rate of the primary fluid becomes the ejector coefficient, which is the main indicator for measuring the performance of the ejector.
正如背景技术所介绍的，现有技术中存在喷射器一般是针对固定工况不可调节的不足，为了解决如上的技术问题，本申请提出了一种可调式喷射器。这个可调式喷射器方案中包括喷嘴位置可调和喉嘴比可调两种形式。这两种形式可以单独使用，也可以放一起使用。本发明采用波纹管侧面受力可使波纹管发生伸缩形变的原理。使波纹管形变，从而控制喷射器喷嘴的位置或者喷射器的
喉嘴比。本专利申请的可调节喷射器是在普通的喷射器的基础上增加调节部件，实现两种调节方式。As described in the background art, there are deficiencies in the prior art that the injectors are generally not adjustable for fixed operating conditions. To solve the above technical problems, the present application proposes an adjustable injector. This adjustable injector solution includes both adjustable nozzle position and adjustable throat ratio. These two forms can be used alone or together. The invention adopts the principle that the bellows can be flexibly deformed by the side force of the bellows. Deform the bellows to control the position of the injector nozzle or the injector
Throat mouth ratio. The adjustable injector of the present patent application adds adjustment components to the conventional injector to achieve two adjustment modes.
一种可自动调节的喷射器，所述喷射器包括一次流入口1、喷嘴(包括喷嘴喉部和喷嘴出口)、吸入室2、二次流入口6、混合室(包括等压混合段5和等面积混合段7)、扩散室8、喷针支架14、控制喷嘴或者喷针左右移动的伸缩器(下称伸缩器)构成。所述一次流入口1、混合室和扩散室8依次沿轴线连接，二次流入口6置于混合室下方，通入混合室内，所述喷嘴横穿过一次流入口1进入混合室，且喷嘴圆形喉部与混合室锥形出口处于同一轴线。所述伸缩器置于一次流入口1后，处于喷嘴之前，以达到控制喷嘴或者喷针运动的目的。所述伸缩器与一次流入口、混合室和扩散室依次沿轴线链接。An automatically adjustable injector comprising a primary inlet 1, a nozzle (including a nozzle throat and a nozzle outlet), a suction chamber 2, a secondary inlet 6, a mixing chamber (including an isobaric mixing section 5 and The equal-area mixing section 7), the diffusion chamber 8, the needle holder 14, and a retractor (hereinafter referred to as a retractor) that controls the nozzle or the needle to move left and right. The primary inlet 1, the mixing chamber and the diffusion chamber 8 are sequentially connected along an axis, and the secondary inlet 6 is placed below the mixing chamber, and is introduced into the mixing chamber, and the nozzle passes through the primary inlet 1 into the mixing chamber, and the nozzle The round throat is on the same axis as the conical outlet of the mixing chamber. The retractor is placed after the primary inflow port 1 and before the nozzle to achieve the purpose of controlling the movement of the nozzle or the needle. The retractor is sequentially linked along the axis with the primary flow inlet, the mixing chamber, and the diffusion chamber.
伸缩器按以下方案构成：选取波纹管或者其它可根据管内压力发生变化而长度发生变化的器材，在其外部套以弹簧，调节伸缩器的弹性系数，使之可以根据一次流大小而伸缩到合适的位置。The retractor is constructed as follows: a bellows or other device that can change its length according to the change of the pressure inside the pipe is selected, and a spring is arranged on the outside to adjust the elastic coefficient of the retractor so that it can be expanded according to the size of the primary flow. s position.
本申请的一种典型的实施方式中，提供了喷嘴位置可调的喷射器，如图2所示，在实现喷嘴位置可调时，第一伸缩器9的波纹管为两个，分别设置在喷嘴的入口端的上下两侧。In an exemplary embodiment of the present application, an injector having an adjustable nozzle position is provided. As shown in FIG. 2, when the position of the nozzle is adjustable, the bellows of the first retractor 9 are two, respectively disposed in The upper and lower sides of the inlet end of the nozzle.
当喷射器一次流压力增大时，伸缩器***所受压力增大，即图5中F增大，形如波纹管的伸缩器发生形变，将伸长，喷射器NXP减小；当喷射器一次流压力减小时，形如波纹管的伸缩器发生形变，将缩短，喷射器NXP增大。给伸缩器设置合适的弹性系数，就可以使得无论一次流压力发生何种变化，喷射器的喷嘴都能处于一个最优的位置，即喷射器的NXP始终保持对应于该一次流压力的最优值，从而使得喷射器的引射系数保持一个较高的值。
When the primary flow pressure of the injector increases, the pressure on the periphery of the expander increases, that is, F increases in FIG. 5, and the expansion of the bellows is deformed, which will elongate, and the injector NXP is reduced; When the primary flow pressure is reduced, the bellows shaped like a bellows is deformed and will be shortened, and the injector NXP is increased. By setting the appropriate spring constant of the retractor, the nozzle of the injector can be in an optimal position regardless of the change of the primary flow pressure, that is, the NXP of the injector always maintains the optimum corresponding to the primary flow pressure. The value is such that the ejector's ejector coefficient remains at a higher value.
如图3所示，该结构的喷射器与图2所示喷射器的区别是：第二伸缩器11为在图2中伸缩器的波纹管中再加一层波纹管，形成一个密闭的空间。该两层波纹管至于导管10内，图中所示的引入的压力可以是二次流压力、背压或者是某一恒定压力。当一次流压力增大时，形如波纹管的伸缩器发生形变，将伸长，喷射器NXP减小；当喷射器一次流压力减小时，形如波纹管的伸缩器发生形变，将缩短，喷射器NXP增大。这个结构的喷射器相比于图2所示的喷射器的优势是，可以引入背压或者二次流压力为反馈，使得NXP的调节更加精准。As shown in FIG. 3, the difference between the injector of the structure and the injector shown in FIG. 2 is that the second retractor 11 is a bellows in the bellows of the retractor of FIG. 2 to form a closed space. . The two layers of bellows are in the conduit 10 and the introduced pressure shown in the figures can be secondary flow pressure, back pressure or a constant pressure. When the primary flow pressure is increased, the bellows of the bellows is deformed and will be elongated, and the injector NXP is reduced; when the primary flow pressure of the injector is reduced, the shape of the bellows of the bellows is deformed and shortened. The injector NXP is increased. The advantage of this structure of the injector compared to the injector shown in Figure 2 is that the back pressure or secondary flow pressure can be introduced as feedback, making the adjustment of the NXP more precise.
本申请的另一种实施例中，喉嘴比可调的喷射器，如图4所示，第三伸缩器12的波纹管为两组，每组包括形成的密闭的空间两个波纹管，两组波纹管分别与喷针相连。In another embodiment of the present application, the throat is more adjustable than the ejector, as shown in FIG. 4, the bellows of the third retractor 12 are two groups, each group comprising two corrugated tubes formed in a closed space. The two sets of bellows are connected to the needles respectively.
当喷射器一次流压力增大时，伸缩器所受压力增大，形如波纹管的伸缩器发生形变将伸长，喷针前移，减小喷射器喷嘴喉部的面积，从而AR增大；反之，AR减小。给伸缩器设置合适的弹性系数，就可以使得无论一次流压力发生何种变化，喷射器的AR始终保持对应于该一次流压力的最优值，从而使得喷射器的引射系数保持一个较高的值。喷针支架的作用是固定喷针只能左右移动，不能够上下摆动，并且喷针支架14不影响一次流的流动。When the primary flow pressure of the injector increases, the pressure of the retractor increases, the deformation of the retractor of the bellows is elongated, the needle advances, and the area of the throat of the injector nozzle is reduced, thereby increasing the AR. Conversely, AR decreases. By setting the appropriate spring constant of the retractor, the AR of the injector can always maintain the optimum value corresponding to the primary flow pressure regardless of the change of the primary flow pressure, so that the ejector coefficient of the injector is kept higher. Value. The function of the needle holder is that the fixed needle can only move left and right, cannot swing up and down, and the needle holder 14 does not affect the flow of the primary flow.
喷针13与伸缩器连接在一起。喷着随着伸缩器运动而运动。The needle 13 is coupled to the retractor. The spray moves as the retractor moves.
喷针的顶端是一个圆锥体，随着喷针向右移动，喷针阻塞喷组喉部的面积越大，导致喷嘴越小，从而改变了喉嘴比。The tip of the needle is a cone. As the needle moves to the right, the larger the area of the throat that the needle blocks the spray, the smaller the nozzle, which changes the throat ratio.
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之
内。
The above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and various changes and modifications may be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.
Inside.
Claims (10)
- 一种可自动调节的喷射器，其特征是，所述喷射器包括依次沿轴线连接的一次流入口、混合室和扩散室，所述混合室下方设置有二次流入口，所述二次流入口通入混合室内，喷嘴横穿过一次流入口进入混合室，且喷嘴的圆形喉部与混合室锥形出口处于同一轴线；An automatically adjustable injector, characterized in that the injector comprises a primary flow inlet, a mixing chamber and a diffusion chamber connected in series along an axis, and a secondary inlet is provided below the mixing chamber, the secondary flow The inlet enters the mixing chamber, the nozzle traverses through the primary inlet into the mixing chamber, and the circular throat of the nozzle is on the same axis as the tapered outlet of the mixing chamber;所述一次流入口后且喷嘴之前设置有伸缩器，所述伸缩器与一次流入口、混合室和扩散室依次沿轴线连接，所述伸缩器用于控制喷嘴的运动。After the primary inflow port and before the nozzle, a retractor is provided, the retractor being sequentially connected to the primary flow inlet, the mixing chamber and the diffusion chamber along an axis, and the retractor is used to control the movement of the nozzle.
- 如权利要求1所述的一种可自动调节的喷射器，其特征是，所述伸缩器包括波纹管或者其它可根据喷射器内压力发生变化而长度发生变化的器材，所述波纹管外部套以弹簧，所述弹簧用于调节伸缩器的弹性系数，使之可以根据一次流大小而伸缩到合适的位置。An automatically adjustable injector according to claim 1 wherein said bellows comprises a bellows or other means of varying length depending on changes in pressure within the injector, said bellows outer sleeve With a spring, the spring is used to adjust the spring constant of the retractor so that it can be expanded to a suitable position according to the size of the primary flow.
- 如权利要求1所述的一种可自动调节的喷射器，其特征是，所述伸缩器用于控制喷嘴的运动实现喷嘴位置可调。An automatically adjustable injector according to claim 1 wherein said retractor is adapted to control the movement of the nozzle to effect adjustment of the nozzle position.
- 如权利要求1所述的一种可自动调节的喷射器，其特征是，所述伸缩器用于控制喷嘴的运动实现喷嘴喉嘴比可调。An automatically adjustable injector according to claim 1 wherein said retractor is adapted to control the movement of the nozzle to achieve a nozzle throat ratio adjustable.
- 如权利要求3所述的一种可自动调节的喷射器，其特征是，在实现喷嘴位置可调时，所述伸缩器的波纹管为两个，分别设置在喷嘴的入口端的上下两侧，给伸缩器设置合适的弹性系数，使得无论一次流压力发生何种变化，喷射器的喷嘴都能处于一个最优的位置，即喷射器的NXP始终保持对应于该一次流压力的最优值，从而使得喷射器的引射系数保持一个较高的值。An automatically adjustable injector according to claim 3, wherein when the position of the nozzle is adjustable, the bellows of the retractor are two, respectively disposed on the upper and lower sides of the inlet end of the nozzle. The appropriate elastic modulus is set for the retractor so that the nozzle of the injector can be in an optimal position regardless of the change of the primary flow pressure, that is, the NXP of the injector always maintains an optimum value corresponding to the primary flow pressure. Thereby the ejector coefficient of the injector is maintained at a higher value.
- 如权利要求5所述的一种可自动调节的喷射器，其特征是，所述伸缩器的每个波纹管相对应的位置再增加一层波纹管，在喷嘴的入口端的上下两侧分别形成一个由两层波纹管形成的密闭的空间； An automatically adjustable injector according to claim 5, wherein a corresponding layer of bellows is added to each of the bellows corresponding to the position of the bellows, and the upper and lower sides of the inlet end of the nozzle are respectively formed. a closed space formed by two layers of bellows;所述伸缩器引入背压或者二次流压力为反馈，使得喷射器NXP的调节更加精准。The retractor introduces a back pressure or a secondary flow pressure as feedback, so that the adjustment of the injector NXP is more precise.
- 如权利要求4所述的一种可自动调节的喷射器，其特征是，所述伸缩器用于控制喷嘴的运动实现喷嘴喉嘴比可调时，所述伸缩器的波纹管设置在喷嘴的入口端的内侧，伸缩器入口端连接一次流入口端，伸缩器出口端连接喷针，所述喷针与伸缩器连接在一起，喷着随着伸缩器运动而运动。An automatically adjustable injector according to claim 4, wherein said bellows is used to control the movement of the nozzle to achieve a nozzle throat ratio adjustable, the bellows of said bellows being disposed at the inlet of the nozzle On the inner side of the end, the inlet end of the retractor is connected to the primary inflow port end, and the outlet end of the retractor is connected to the needle, and the needle is connected with the retractor, and the spray moves as the retractor moves.
- 如权利要求7所述的一种可自动调节的喷射器，其特征是，所述喷针通过喷针支架与喷嘴相连，所述喷针支架的作用是固定喷针只能左右移动，不能够上下摆动，并且喷针支架不影响一次流的流动。An automatically adjustable injector according to claim 7, wherein the needle is connected to the nozzle through a needle holder, and the needle holder functions to fix the needle only to move left and right, and cannot Swing up and down, and the needle holder does not affect the flow of the primary flow.
- 如权利要求8所述的一种可自动调节的喷射器，其特征是，所述喷针的顶端是一个圆锥体，随着喷针向右移动，喷针阻塞喷组喉部的面积越大，导致喷嘴越小，从而改变了喉嘴比。An automatically adjustable injector according to claim 8, wherein the tip of the needle is a cone, and the larger the area of the throat of the nozzle is blocked as the needle moves to the right. The smaller the nozzle, the more the throat ratio is changed.
- 如权利要求1所述的一种可自动调节的喷射器，其特征是，所述伸缩器的波纹管为两个，分别与喷针相连；An automatically adjustable injector according to claim 1, wherein the bellows of the retractor are two, respectively connected to the needle;或or所述伸缩器的波纹管为两组，每组包括形成的密闭的空间两个波纹管，两组波纹管分别与喷针相连。 The bellows of the retractor are two groups, each group comprising two corrugated tubes formed in a closed space, and the two sets of bellows are respectively connected with the needles.
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| CN106423608A (en) * | 2016-10-26 | 2017-02-22 | 山东大学 | Ejector with spray nozzle position adjustable and device |
| CN106861961B (en) * | 2017-03-10 | 2019-01-18 | 山东大学 | A kind of self-adjustable injector |
| CN107537335B (en) * | 2017-10-10 | 2024-02-06 | 中煤科工清洁能源股份有限公司 | Nozzle, mixer and feeding system |
| CN107827111B (en) * | 2017-11-21 | 2022-07-12 | 万华化学(福建)有限公司 | Adjustable ejector and phosgene synthesis method for recycling tail gas |
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| CN110841821B (en) * | 2019-10-12 | 2021-07-13 | 内蒙古科技大学 | Sprayer with nozzle outlet position capable of being automatically adjusted |
| CN111410254A (en) * | 2020-05-20 | 2020-07-14 | 山东建筑大学 | Injection pump, thermal power plant low-temperature waste heat seawater desalination system and seawater desalination method |
| CN112727812B (en) * | 2021-01-08 | 2021-12-24 | 清华大学 | Ejector with variable shape of middle section of elastic material |
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| CN105363582A (en) * | 2015-12-16 | 2016-03-02 | 山东大学 | Needle control device capable of adjusting area of ejector nozzle and ejector |
| CN105650039A (en) * | 2016-03-15 | 2016-06-08 | 江苏大学 | Jet pump allowing distance between venturi and nozzle to be changed |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106861961B (en) | 2019-01-18 |
| CN106861961A (en) | 2017-06-20 |
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