SU850935A1

SU850935A1 - Centrifugal supercharger impeller

Info

Publication number: SU850935A1
Application number: SU792844470A
Authority: SU
Inventors: Сергей Петрович Зарицкий; Юрий Николаевич Синицын
Original assignee: Всесоюзный Научно-Исследовательскийинститут Природных Газов "Вниигаз"
Priority date: 1979-11-29
Filing date: 1979-11-29
Publication date: 1981-07-30

Description

(54) РАБОЧЕЕ КОЛЕСО ЦЕНТРОБЕЖНОГО НАГНЕТАТЕЛЯ(54) WORKING WHEEL CENTRIFUGAL SUPPLYER

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Изобретение относитс к компрессоростроению и, в частности, к рабочим колесам центробежных нагнетателей .This invention relates to a compressor industry and, in particular, to impellers of centrifugal superchargers.

По основному авт. св. 572585 известно рабочее колесо центробеж ного нагнетател , преимущественно дл транспортировки запыленного при .родного газа, содержащее основной диск, имеющий криволинейньй учдс;тток на входе в колесо и пр нюлинейный радиальный участок с лопаткгши йа вьЬсоде, покрывной диск и разме- j щенный перед лопатками рассеиватель пыли, выполненный в виде кольцевой выемки, расположенной в зоне сопр жени криволинейного и пр молинейного участков, и задн стенка выемки плавно сопр жена с радиальным участком 1,According to the main author. St. 572585 a centrifugal blower impeller is known, mainly for transporting natural gas dusted with a primary disk containing a curvilinear duct; a current at the wheel inlet and a straight radial section with vanes, a top disk and a diffuser disposed in front of the blades dust, made in the form of an annular notch located in the junction area of the curvilinear and rectilinear sections, and the back wall of the notch smoothly mates with the radial section 1,

Однако данное колесо «Обладает недостаточно высокой надежностью изза эрозии элементов колеса.However, this wheel “Has not sufficiently high reliability due to erosion of wheel elements.

Цель изобретени - повышение надежности путем увеличени эрозионной стойкости колеса.The purpose of the invention is to increase reliability by increasing the erosion resistance of the wheel.

Указанна цель достигаетс тем, что на входной .кромке каждой лопатки закреплены конусные насадки из эрозионно-стойкого материала, расположенные под переменным к образующей кромки, увеличиваивдимс в напргшлении к основному диску, и ориентгированные вершинами на входну кромку кольцевой выемки. Между насадками и телом лопатки могут быть размещены демпфирующие упругие прокладки .This goal is achieved by the fact that conical nozzles of erosion-resistant material are fixed on the inlet edge of each blade, located under the variables to the forming edge, increased in pressure to the main disk, and are oriented by the vertices on the inlet edge of the annular notch. Damping resilient gaskets can be placed between the nozzles and the body of the blade.

На фиг. 1 показано меридиональное сечение рабочего колеса центробежного нагнетател ; на фиг. 2 - узел 1 на фиг. 1; на фиг. 3 - насадка, разрез.FIG. 1 shows a meridional section of the impeller of a centrifugal supercharger; in fig. 2 — node 1 in FIG. one; in fig. 3 - nozzle, cut.

Claims

The impeller contains the main disk 1, the curvilinear section 2 at the wheel inlet and the straight radial section 3 with vanes Xcmi 4 at the exit, the rotary disk 5 and a dust diffuser placed in front of the shoulder blade, made in the form of an annular recess 6 located in the junction area section 2 and the straight-line section 3, and; the back wall 7 of the diffuser dust smoothly matched with the radiological section 3. At the entrance edge 8 of each blade 4 there are fixed conical nozzles 9 of erosion-resistant material located under ennym ot angle to the generatrix edge 8, uvelichivayuschims osnovnok1u toward the disk 1, and 10 vertices oriented in the leading edge 11 of the groove b. Between the nozzles 9 and the body of the blade 4, damping and resilient gaskets 12 may be placed. During operation of the supercharger in the recess b there is a stagnant zone in which the flow vortex flow is formed in the direction shown. by the arrow, which is maintained by the energy of the main flow. The particles suspended in the dusty gas are concentrated under the action of centrifugal forces in a large degree: at the base disk 1, they move along the curvilinear section 2 and separate into the stagnant zone, moving along straight linear trajectories before the collision with the disk 1, after which they lose some of the kinetic energy and are involved in a vortex flow: Under the action of centrifugal forces, particles at different angles, depending on mass and velocity, are introduced into the main flow, which ensures their dispersion over the height of the blades 4 and eliminates concentration in the root zone. Intersecting the main flow, the particles fall on the nozzles 9, from which ricochetting is dispersed in the main flow of the interscapular canal, which virtually eliminates the concentration of particles on the trough and the back of the blades 4 and reduces the erosion effect on them. At the same time, the nozzles 9 protect the edge 8 from Erosion due to the fact that their material is more resistant to erosion than the material of the blades 4 and due to the fact that the kinetic energy of the particles acting on the nozzles 9 decreases as the particles act on nozzles 9 at an angle to its surface. The presence of elastic gaskets 12 ensures the flexibility of the nozzles 9, i.e. contributes to the damping of the particles and thus further increases the resistance of the nozzles 9 to er 3 zii. The arrangement of the nozzles 9 with the angle of inclination increasing in the direction of the root of the blades 4 makes it possible to evenly disperse particles along the height of the blades 4 and that the provision is ensured. wear uniformity with a relative decrease in its intensity. Thus, this impeller design enhances its performance and reliability by increasing its erosion resistance. The invention claims 1. Centrifugal supercharger impeller according to auth. No. 572585, characterized in that, in order to increase reliability by increasing the erosion resistance of the wheel, conical nozzles of erosion-resistant material are mounted on the inlet edge of the kg1 of each blade and are oriented at a variable angle to the main edge and oriented to the vertices at the entrance edge of the annular recess.

2. Wheel under item 1, characterized in that between the nozzles and the blade body there are damping elastic pads, I Sources of information taken into account during the examination 1. USSR author's certificate 572585, cl. F 04 D 29/28, 1976.

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