CN204656772U - A kind of two phase flow atomization aeration nozzle - Google Patents
A kind of two phase flow atomization aeration nozzle Download PDFInfo
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- CN204656772U CN204656772U CN201520222256.7U CN201520222256U CN204656772U CN 204656772 U CN204656772 U CN 204656772U CN 201520222256 U CN201520222256 U CN 201520222256U CN 204656772 U CN204656772 U CN 204656772U
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- 238000005273 aeration Methods 0.000 title claims abstract description 20
- 230000005514 two-phase flow Effects 0.000 title claims abstract description 20
- 238000000889 atomisation Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007921 spray Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 230000002262 irrigation Effects 0.000 description 6
- 238000003973 irrigation Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000003116 impacting effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
本实用新型公开了一种两相流雾化掺气喷嘴，属于流体机械技术领域，本实用新型所涉及两相流雾化掺气喷嘴包括喷嘴主体、调节套、锁紧套和混合喷嘴，喷嘴主体与混合喷嘴的出口端均采用渐缩锥孔状，且喷嘴主体与混合喷嘴的出口孔为同心；混合喷嘴上开设有若干个进气孔，调节套上开设有若干调节孔，旋转调节套，改变调节孔与进气孔的相对位置可改变喷头掺气量；由于本实用新型的喷嘴采用了两相流掺气结构，能够产生更为理想的雾化喷射效果，同时，本实用新型结构简单，操作轻便，容易制造。
The utility model discloses a two-phase flow atomization aeration nozzle, which belongs to the technical field of fluid machinery. The two-phase flow atomization aeration nozzle involved in the utility model includes a nozzle main body, an adjustment sleeve, a locking sleeve and a mixing nozzle. Both the main body and the outlet end of the mixing nozzle are in the shape of tapered tapered holes, and the nozzle main body and the outlet hole of the mixing nozzle are concentric; there are several air inlet holes on the mixing nozzle, and several adjustment holes on the adjustment sleeve. , changing the relative position of the adjustment hole and the air inlet hole can change the aeration volume of the nozzle; because the nozzle of the utility model adopts a two-phase flow aeration structure, it can produce a more ideal atomization spray effect, and at the same time, the utility model has a simple structure , easy to operate and easy to manufacture.
Description
技术领域 technical field
本实用新型涉及一种喷嘴结构，特别是涉及一种用于摇臂式喷头的两相流雾化掺气喷嘴，属于流体机械技术领域。 The utility model relates to a nozzle structure, in particular to a two-phase flow atomizing aeration nozzle for a rocker nozzle, which belongs to the technical field of fluid machinery.
背景技术 Background technique
摇臂式喷头是国内应用最广的一种喷灌喷头，为保证喷头稳定工作和水力性能，通常需要提供较高的工作压力，这导致喷灌系统能耗偏高。为降低摇臂喷头的工作压力或提高水力性能，相关科研人员提供了不同的解决方案。 The rocker sprinkler is the most widely used sprinkler in China. In order to ensure the stable operation and hydraulic performance of the sprinkler, it is usually necessary to provide a high working pressure, which leads to high energy consumption of the sprinkler irrigation system. In order to reduce the working pressure of the rocker nozzle or improve the hydraulic performance, relevant researchers have provided different solutions.
专利CN201930870U号公开了一种摇臂式喷头，使用顶端径向开有节流槽的副喷嘴实现喷头本位附近区域的喷灌，提高了喷灌覆盖范围，该结构通过附加结构改善喷头径向水量分布，但对喷头射流破碎过程无影响，对喷头低压工况的水量分布影响较少，不能实现喷头的低压喷灌。 Patent CN201930870U discloses a rocker-type sprinkler head, which uses a sub-nozzle with a throttle groove in the radial direction at the top to realize sprinkler irrigation in the vicinity of the sprinkler head, improving the coverage of sprinkler irrigation. This structure improves the radial water distribution of the sprinkler head through an additional structure. However, it has no effect on the jet crushing process of the nozzle, and has less influence on the water distribution of the nozzle in the low-pressure working condition, and the low-pressure sprinkling irrigation of the nozzle cannot be realized.
专利CN202762569U号公开了一种摇臂喷头，使用网孔状的主喷嘴和副喷嘴加速射流破碎，改善了喷头的水量分布，但网孔状喷嘴会显著降低喷头射程，相比于均匀度提高程度，射程对喷头性能影响将更显著，因此该方法实际应用前景差。喷头工作时，射流分散成水滴的过程是由于射流的紊动作用使周围空气与射流质点发生动量交换，靠近液柱表面的气相获得一定速度，同时主射流表面有部分液体有动量损失，而速度变慢，逐渐脱离主体射流，从受力上分析，射流主体受重力，空气阻力，表面张力等的影响，使射流断面上流速分布不均，连续流体发生碎裂。现有摇臂式喷头的喷嘴通常为简单的渐缩喷嘴，仅靠射流喷出之后的边界卷吸空气实现雾化，雾化效果难以控制。 Patent CN202762569U discloses a rocker nozzle, which uses mesh-shaped main nozzles and sub-nozzles to accelerate jet breakage, which improves the water distribution of the nozzle, but the mesh-shaped nozzle will significantly reduce the range of the nozzle, compared to the degree of uniformity improvement , the range will have a more significant impact on the performance of the nozzle, so the practical application prospect of this method is poor. When the nozzle is working, the process of the jet dispersing into water droplets is due to the momentum exchange between the surrounding air and the jet particle due to the turbulent action of the jet, and the gas phase near the surface of the liquid column obtains a certain velocity, and at the same time, part of the liquid on the surface of the main jet loses momentum, and the velocity It slows down and gradually breaks away from the main jet. From the analysis of the force, the main body of the jet is affected by gravity, air resistance, surface tension, etc., which makes the flow velocity distribution on the jet section uneven and the continuous fluid breaks up. The nozzles of the existing rocker nozzles are usually simple converging nozzles, and the atomization is achieved only by entrained air at the boundary after the jet is ejected, and the atomization effect is difficult to control.
实用新型内容 Utility model content
本实用新型的目的在于克服现有技术不足，提供一种两相流雾化掺气喷嘴，它能够有效地改善摇臂式喷头在低压工况下的射流散射效果，提高喷头喷灌均匀性。 The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a two-phase flow atomizing air-entraining nozzle, which can effectively improve the jet scattering effect of the rocker-type sprinkler under low-pressure conditions, and improve the uniformity of sprinkler irrigation.
为了达到上目的，本实用新型采用了如下的技术方案： In order to achieve the above purpose, the utility model adopts the following technical solutions:
一种两相流雾化掺气喷嘴，其特征在于：所述两相流雾化掺气喷嘴包括喷嘴主体、调节套、锁紧套和混合喷嘴；所述混合喷嘴通过螺纹固定连接在喷嘴主体外侧；所述调节套套装在混合喷嘴的外侧；所述锁紧套通过螺纹固定连接在混合喷嘴外侧，以压紧调节套，防止调节套滑动。 A two-phase flow atomization aeration nozzle, characterized in that: the two-phase flow atomization aeration nozzle includes a nozzle body, an adjustment sleeve, a locking sleeve and a mixing nozzle; the mixing nozzle is fixedly connected to the nozzle body through threads outside; the adjusting sleeve is set on the outside of the mixing nozzle; the locking sleeve is fixedly connected to the outside of the mixing nozzle through threads, so as to compress the adjusting sleeve and prevent the adjusting sleeve from sliding.
其中，所述喷嘴主体与混合喷嘴均采用渐缩锥孔状，且喷嘴主体与混合喷嘴的的出口孔为同心，防止偏心装配后射流主体冲击到混合喷嘴内壁，造成混合喷嘴内部充满水流，无法形成气液混合腔； Wherein, both the nozzle body and the mixing nozzle are in the shape of tapered cone holes, and the outlet holes of the nozzle body and the mixing nozzle are concentric to prevent the jet body from impacting the inner wall of the mixing nozzle after eccentric assembly, causing the inside of the mixing nozzle to be filled with water flow, which cannot Form a gas-liquid mixing chamber;
所述调节套内侧设置有两个密封环，密封环内装有密封圈密封调节套和混合喷嘴之间的间隙； Two sealing rings are arranged inside the adjusting sleeve, and the sealing rings are equipped with sealing rings to seal the gap between the adjusting sleeve and the mixing nozzle;
所述混合喷嘴靠近喷嘴主体一端侧面开设有若干个进气孔；所述调节套上开设有若干个调气孔，调气孔的位置需保证装配后进气孔和调气孔联通；旋转调节套，调节进气孔和调气孔的相对位置可调节掺气量，改变摇臂式喷头射流雾化效果。 The side of the mixing nozzle close to the nozzle main body is provided with several air intake holes; the adjustment sleeve is provided with several air adjustment holes, and the position of the air adjustment holes needs to ensure that the air intake hole and the air adjustment hole are connected after assembly; rotate the adjustment sleeve to adjust the air intake The relative position of the hole and the air-regulating hole can adjust the air volume and change the jet atomization effect of the rocker nozzle.
所述喷嘴主体出口孔直径为d，混合喷嘴的出口孔直径为D，则 ；随喷嘴主体直径d的增大，取值增大，具体地，当时，， 当时，。 The diameter of the outlet hole of the nozzle main body is d, and the diameter of the outlet hole of the mixing nozzle is D, then ; With the increase of nozzle body diameter d, The value increases, specifically, when hour, , when hour, .
所述喷嘴主体出口孔与混合喷嘴的出口孔之间的距离为L，且。 The distance between the outlet hole of the nozzle body and the outlet hole of the mixing nozzle is L, and .
所述混合喷嘴上的进气孔数量大于3个，在圆周上均布；进气孔的孔径为A，在喷头工作压力较低时，，当工作压力较高时，可适当增加补气孔的数量，补气孔。 The number of air inlet holes on the mixing nozzle is greater than 3, which are evenly distributed on the circumference; the aperture of the air inlet holes is A, and when the working pressure of the nozzle is low, , when the working pressure is high, the number of air supply holes can be appropriately increased, and the air supply holes .
如对进口直径较小的喷头，如PY10、PY15和PY20喷头，其进气孔直径为按以下尺寸加工，对PY30及以上喷头，其进气孔直径为按以下尺寸加工，进气孔直径尺寸为，还可适当增加进气孔数量。 For nozzles with smaller inlet diameters, such as PY10, PY15 and PY20 nozzles, the diameter of the air inlet hole is processed according to the following dimensions , for PY30 and above nozzles, the diameter of the air inlet hole is processed according to the following dimensions, and the diameter of the air inlet hole is , but also appropriately increase the number of air intake holes.
本实用新型的有益效果是：The beneficial effects of the utility model are:
混合喷嘴出口孔比喷嘴主体出口孔大，可防止射流冲击混合喷嘴的内壁，造成混合喷嘴内部无法产生负压腔；通过设计喷嘴主体出口孔与混合喷嘴的出口孔之间的距离L及进气孔的孔径A可保证射流在负压腔内可卷吸较多空气，形成气液两相混合的主射流。 The outlet hole of the mixing nozzle is larger than the outlet hole of the nozzle body, which can prevent the jet from impacting the inner wall of the mixing nozzle, resulting in no negative pressure chamber inside the mixing nozzle; by designing the distance L between the outlet hole of the nozzle body and the outlet hole of the mixing nozzle and the air intake The aperture A of the hole can ensure that the jet can entrain more air in the negative pressure chamber to form the main jet of gas-liquid two-phase mixing.
本实用新型提供的喷嘴结构简单，容易制造，经喷嘴混合后产生的水气两相射流进入环境压力为大气压的无限空间中，由于水射流自身含有微小气泡，在喷出前后，气泡因压力变化发生体积的改变，对射流主体的碎裂产生影响，明显提高了摇臂式喷头的雾化效果。 The nozzle provided by the utility model has a simple structure and is easy to manufacture. The water-air two-phase jet flow produced after the nozzle is mixed enters the infinite space where the ambient pressure is atmospheric pressure. Since the water jet itself contains tiny bubbles, the bubbles will change due to pressure changes before and after spraying. The volume change occurs, which affects the fragmentation of the jet body, and significantly improves the atomization effect of the rocker nozzle.
附图说明 Description of drawings
图1为现有技术中的摇臂式喷头以及安装在其上的喷嘴的结构示意图； Fig. 1 is the structural representation of the rocker type shower head in the prior art and the nozzle that is installed on it;
图2为本实用新型的两相流雾化掺气喷嘴结构示意图。 Fig. 2 is a schematic diagram of the structure of the two-phase flow atomizing aeration nozzle of the present invention.
图3为掺气摇臂式喷头与普通摇臂喷头低压工况下的水量分布曲线。 Fig. 3 is the water volume distribution curve of the aerated rocker-arm sprinkler and the common rocker-arm sprinkler under the low-pressure working condition.
图中标记为：1-喷嘴组件，2-摇臂，3-换向机构，4-喷管，5-喷嘴主体，6-调节套，7-锁紧套，8-混合喷嘴，9-密封圈，10-进气孔，11-调节孔。 Marked in the figure: 1-nozzle assembly, 2-rocker arm, 3-reversing mechanism, 4-nozzle pipe, 5-nozzle body, 6-adjusting sleeve, 7-locking sleeve, 8-mixing nozzle, 9-sealing Circle, 10-air intake hole, 11-regulating hole.
具体实施方式 Detailed ways
下面结合附图和具体实施例对本实用新型作进一步说明： Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:
如图2所示，一种两相流雾化掺气喷嘴，包括喷嘴主体5、调节套6、锁紧套7和混合喷嘴8；所述混合喷嘴8通过螺纹固定连接在喷嘴主体5外侧；所述调节套6套装在混合喷嘴8的外侧；所述锁紧套7通过螺纹固定连接在混合喷嘴8外侧，以压紧调节套6，防止调节套6滑动。 As shown in Figure 2, a two-phase flow atomizing aeration nozzle includes a nozzle body 5, an adjustment sleeve 6, a locking sleeve 7 and a mixing nozzle 8; the mixing nozzle 8 is fixedly connected to the outside of the nozzle body 5 through threads; The adjusting sleeve 6 is set on the outside of the mixing nozzle 8; the locking sleeve 7 is fixedly connected to the outside of the mixing nozzle 8 through threads, so as to compress the adjusting sleeve 6 and prevent the adjusting sleeve 6 from sliding.
其中喷嘴主体5与混合喷嘴8均采用渐缩锥孔状，且喷嘴主体5与混合喷嘴8的的出口孔为同心，防止偏心装配后射流主体冲击到混合喷嘴8内壁，造成混合喷嘴8内部充满水流，无法形成气液混合腔； Wherein the nozzle body 5 and the mixing nozzle 8 both adopt the tapered hole shape, and the outlet holes of the nozzle body 5 and the mixing nozzle 8 are concentric to prevent the jet body from impacting the inner wall of the mixing nozzle 8 after eccentric assembly, causing the inside of the mixing nozzle 8 to be full. Water flow, unable to form a gas-liquid mixing chamber;
调节套6内侧设置有两个密封环，密封环内装有密封圈9密封调节套6和混合喷嘴8之间的间隙； Two sealing rings are arranged on the inner side of the adjusting sleeve 6, and a sealing ring 9 is installed in the sealing ring to seal the gap between the adjusting sleeve 6 and the mixing nozzle 8;
混合喷嘴8靠近喷嘴主体5一端侧面开设有若干个进气孔10；所述调节套6上开设有若干个调气孔11，调气孔11的位置需保证装配后进气孔10和调气孔11联通；旋转调节套6，调节进气孔10和调气孔11的相对位置可调节掺气量，改变摇臂式喷头射流雾化效果。 The mixing nozzle 8 is provided with several air intake holes 10 on the side of one end of the nozzle body 5; the adjustment sleeve 6 is provided with several air adjustment holes 11. The adjusting sleeve 6 can adjust the relative position of the air inlet hole 10 and the air regulating hole 11 to adjust the air volume and change the jet atomization effect of the rocker-arm nozzle.
具体地以PY15喷头作为实施例阐述如下，在本实施例中PY15喷头的喷嘴主体5出口孔直径为d=6mm，混合喷嘴8的出口孔直径为D可按下述尺寸加工 ，通过样机试验验证， PY15喷头混合喷嘴8的出口孔直径最优值取D=6.3mm。喷嘴主体5与混合喷嘴8的出口孔之间的距离为L，且。在本实施例中喷嘴主体5与混合喷嘴8的出口孔之间的距离L尺寸为L=40mm。 Specifically, the PY15 nozzle is used as an example to set forth as follows. In this embodiment, the diameter of the outlet hole of the nozzle body 5 of the PY15 nozzle is d =6mm, and the diameter of the outlet hole of the mixing nozzle 8 is D, which can be processed according to the following dimensions , through the prototype test verification, the optimal value of the outlet hole diameter of the mixing nozzle 8 of the PY15 nozzle is D = 6.3mm. The distance between the nozzle body 5 and the outlet hole of the mixing nozzle 8 is L , and . In this embodiment the distance L between the nozzle body 5 and the outlet opening of the mixing nozzle 8 is L = 40 mm.
混合喷嘴8上开设有若干个进气孔10，在圆周上均布，进气孔10的孔径为A；调节套6上开有若干个调气孔11，调气孔11的数量与进气孔10的数量一致，通常调气孔11的孔径与进气孔10的孔径取相同值。 The mixing nozzle 8 is provided with several air inlets 10, which are evenly distributed on the circumference, and the aperture of the air inlets 10 is A ; on the regulating cover 6, there are several air-regulating holes 11, and the quantity of the air-adjusting holes 11 is the same as that of the air inlets 10. The number is the same, usually the aperture of the air-regulating hole 11 is the same as the aperture of the air inlet hole 10.
对进口直径较小的喷头，如PY10、PY15和PY20喷头，其进气孔直径为按以下尺寸加工，对PY30及以上喷头，其进气孔直径，，还可适当增加进气孔数量。 For nozzles with smaller inlet diameters, such as PY10, PY15 and PY20 nozzles, the diameter of the air inlet hole is processed according to the following dimensions. For PY30 and above nozzles, the diameter of the air inlet hole is , and the number of air inlet holes can also be increased appropriately.
具体的，在本实施例中，PY15喷头混合喷嘴8上开有3个直径为3mm的进气孔10，调节套6上也开有3个直径为3mm的调气孔11。PY15喷头在使用过程中，若想调节进气孔的进气量，可旋转调节套6，改变调气孔11和进气孔10的相对位置来调节进气量，从而改变喷头射流的掺气量，进而改变喷头的雾化效果。 Specifically, in this embodiment, the mixing nozzle 8 of the PY15 spray head is provided with three air intake holes 10 with a diameter of 3 mm, and the adjustment sleeve 6 is also provided with three air regulating holes 11 with a diameter of 3 mm. During the use of the PY15 nozzle, if you want to adjust the intake air volume of the air intake hole, you can rotate the adjustment sleeve 6 to change the relative position of the air adjustment hole 11 and the air intake hole 10 to adjust the air intake volume, thereby changing the air mixing volume of the jet flow of the nozzle. Then change the atomization effect of the nozzle.
混合喷嘴8出口孔比喷嘴主体5出口孔大可防止射流冲击混合喷嘴8的内壁，造成混合喷嘴8内部无法产生负压腔；本实施例中喷嘴主体5出口孔与混合喷嘴8的出口孔之间的距离L及进气孔的孔径A可保证射流在负压腔内可卷吸较多空气，形成气液两相混合的主射流。 The outlet hole of the mixing nozzle 8 is larger than the outlet hole of the nozzle main body 5, which can prevent the jet from impacting the inner wall of the mixing nozzle 8, causing the inside of the mixing nozzle 8 to fail to produce a negative pressure chamber; The distance L between them and the aperture A of the air inlet hole can ensure that the jet can entrain more air in the negative pressure cavity, forming a main jet of gas-liquid two-phase mixing.
如图3所示喷头水量分布图，选取的试验喷头为PY15喷头，喷嘴直径为6mm，PY15喷头的额定压力一般是300kPa，本试验选择的工作压力为230 kPa，普通喷头的水量分布图见附图3，根据测出的单喷头水量分布，计算出喷头的组合均匀性最大值为63%。 As shown in Figure 3, the nozzle water distribution diagram, the selected test nozzle is the PY15 nozzle, the nozzle diameter is 6mm, the rated pressure of the PY15 nozzle is generally 300kPa, and the working pressure selected in this test is 230 kPa, the water distribution diagram of the ordinary nozzle is shown in the attachment Figure 3, according to the measured water distribution of a single nozzle, the maximum combined uniformity of the nozzles is calculated to be 63%.
按照同样试验条件，试验了加装两相流雾化掺气喷嘴的摇臂式喷头，有效改善了喷头喷洒域中段的降水量，因此喷头的水量分布也有一定提高，通过单喷头的水量分布，计算出喷头的组合均匀度最大值为67%，但掺气后喷头射程降低了将近1m。试验结果显示，通过两相流雾化掺气喷嘴掺气改善射流流动特性，可提高喷头低压下的喷灌均匀性，但会降低喷头射程。 According to the same test conditions, the rocker-arm sprinkler head equipped with two-phase flow atomization and air-entraining nozzle was tested, which effectively improved the precipitation in the middle section of the spraying area of the sprinkler head, so the water distribution of the nozzle also improved to a certain extent. Through the water distribution of a single nozzle, It is calculated that the maximum combined uniformity of the nozzle is 67%, but the range of the nozzle is reduced by nearly 1m after aeration. The test results show that improving the jet flow characteristics by aeration through the two-phase flow atomization aeration nozzle can improve the uniformity of sprinkler irrigation under low pressure of the nozzle, but it will reduce the range of the nozzle.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815773A (en) * | 2015-04-14 | 2015-08-05 | 江苏大学 | Two-phase flow atomization air mixing nozzle |
| CN110237950A (en) * | 2019-04-11 | 2019-09-17 | 浙江花园新能源有限公司 | A kind of pot for smelted copper gas-liquid mixed nozzle |
| CN113210151A (en) * | 2021-01-25 | 2021-08-06 | 武汉大学 | Universal cavitation jet nozzle |
| CN114290249A (en) * | 2021-12-31 | 2022-04-08 | 湘潭大学 | Internal cooling grinding wheel |
| CN115674409A (en) * | 2022-11-28 | 2023-02-03 | 江西斯米克陶瓷有限公司 | Glaze spraying device and method for ceramic production process |
| CN116349588A (en) * | 2023-05-16 | 2023-06-30 | 江苏大学流体机械温岭研究院 | Sprinkling irrigation effect improvement device of sprinkling irrigation machine |
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2015
- 2015-04-14 CN CN201520222256.7U patent/CN204656772U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815773A (en) * | 2015-04-14 | 2015-08-05 | 江苏大学 | Two-phase flow atomization air mixing nozzle |
| CN110237950A (en) * | 2019-04-11 | 2019-09-17 | 浙江花园新能源有限公司 | A kind of pot for smelted copper gas-liquid mixed nozzle |
| CN113210151A (en) * | 2021-01-25 | 2021-08-06 | 武汉大学 | Universal cavitation jet nozzle |
| CN114290249A (en) * | 2021-12-31 | 2022-04-08 | 湘潭大学 | Internal cooling grinding wheel |
| CN115674409A (en) * | 2022-11-28 | 2023-02-03 | 江西斯米克陶瓷有限公司 | Glaze spraying device and method for ceramic production process |
| CN116349588A (en) * | 2023-05-16 | 2023-06-30 | 江苏大学流体机械温岭研究院 | Sprinkling irrigation effect improvement device of sprinkling irrigation machine |
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