FI12466U1 - Compressed air nozzle - Google Patents

Description

Paineilmasuutin

The invention relates to a compressed air nozzle for controlling a compressed air jet. The invention is particularly directed to a compressed air nozzle for providing a swirling and sweeping compressed air jet.

Compressed air jets are commonly used, for example, for cleaning, material transfer, and process operations. The jet is controlled by a variety of nozzles, the design of which is designed to provide a jet shape appropriate to each situation. Conventional nozzles are solid and simple in construction, thus not achieving a sufficiently good jet shape. In this case, it is often necessary to increase the duration, volume and / or pressure of the airflow to achieve the desired effect, which tends to increase the cost of using compressed air by default.

Compressed air flow through small cross-sections, such as small nozzles, is of a laminar nature, i.e. even at high air flow rates, which is due in part to the low kinematic viscosity of the air. Therefore, conventional fixed nozzles do not very easily achieve a turbulent, i.e. turbulent, flow of air. If the fixed nozzle is shaped to produce more turbulence, for example by throttling or increasing the air flow, greater pressure losses result, which increases the cost of compressed air. When using a hand held pneumatic gun for cleaning surfaces, for example, sweeping movements are used to move the material away from the areas to be cleaned. The aim is to increase the power of the laminar jet coming from the nozzle by rotating and reciprocating hand movements, which increases the work-related strain.

The compressed air nozzle according to the invention provides a turbulent air flow even at low air flow rates. This reduces compressed air consumption and reduces stress and wear on the nozzle parts, thus reducing the cost of producing compressed air. The invention allows for the desired shape and turbulence of the air flow through the design of the nozzle parts.

The compressed air nozzle according to the invention consists of a body, a fixed nozzle, a rotary nozzle, a turbine part and a bearing. The body includes a pneumatic connection and air ducts passing through the body through the compressed air connection. The fixed nozzle is mounted to the body by a connecting member such as a thread or other mechanical connection. A passage through which the compressed air is conducted is provided through a fixed nozzle. The rotating nozzle is arranged to rotate inside the fixed nozzle by means of a bearing. At its other end, the rotating nozzle is fitted to the fixed nozzle by a sliding fitting and is centered by said bearing on the fixed nozzle. At the first end of the rotating nozzle is provided a turbine part which rotates by the force of the air stream. At one end of the rotating nozzle there are grooves through which air flow is exited from the nozzle. The compressed air nozzle according to the invention operates in such a way that the air flow from the compressed air connection is directed to rotate the turbine part in connection with the rotating nozzle and the rotating nozzle in connection therewith. The air flow is directed through the fixed nozzle channels away from the compressed air nozzle. When exiting, the airflow passes through the grooves at one end of the rotating nozzle, increasing the turbulence of the airflow. At the same time, the outgoing air flow increases the torque applied to the rotating nozzle. The turbulent flow of air is formed from the nozzle when released into a conical shape. In this case, the airflow of the nozzle connected to the pneumatic gun can be used to sweep the surfaces clean without making a handful of extra rotating or reciprocating movements.

The design of the interior of the compressed air nozzle can influence the turbulence of the outgoing air stream and the shape of the jet. For example, changing the pitch or other geometry of the grooves at one end of the rotating nozzle produces jets of different shapes and turbulence.

The present invention overcomes the drawbacks of known solutions and provides a compressed air nozzle which produces a compressed air jet of the desired turbulence and shape. The invention enables a compressed air nozzle Ha to provide a turbulent air flow even at low air flow rates. This reduces compressed air consumption and reduces stress and wear on the nozzle parts, thus reducing the cost of producing compressed air.

Said advantages are achieved by a pneumatic nozzle according to the invention, which is characterized by what is defined in the protective requirements.

In the following, the invention will be explained in detail by means of some preferred embodiments and with reference to the accompanying drawings.

Fig. 1 is a sectional and side elevational view of a compressed air nozzle according to the invention

Figure 2 is a sectional and side elevational view of the body of a compressed air nozzle according to the invention.

Figure 3 is a sectional and side elevational view of the fixed nozzle of the compressed air nozzle of the invention.

Fig. 4 shows a structure of a rotary nozzle of the compressed air nozzle according to the invention, cut along line A-A and viewed from the side.

Figure 4a is a side elevational view of the rotary nozzle of a compressed air nozzle according to the invention.

Figure 4b shows a top plan view of a rotary nozzle of a compressed air nozzle according to the invention.

Figure 5 is a side elevational view of the turbine portion of the compressed air nozzle of the invention in connection with the rotary nozzle.

Fig. 5a shows the structure of the turbine portion in connection with the rotary nozzle of the compressed air nozzle according to the invention, cut along the line A-A and viewed from the side.

Fig. 5b shows the structure of the turbine portion in connection with the rotary nozzle of the compressed air nozzle of the invention, rotated 90 degrees to the right of the position of Fig. 5.

Fig. 5c is a top plan view of the turbine portion of the pneumatic nozzle of the invention in connection with the rotating nozzle.

Fig. 6 shows a sectional and side elevational view of a bearing of a compressed air nozzle according to the invention.

Fig. 6a is a top plan view of the bearing structure of a pneumatic nozzle according to the invention.

Fig. 7 is an exploded view of an assembly of a compressed air nozzle according to the invention.

Figures 1-7 show a pneumatic nozzle comprising a body 1, a fixed nozzle 2, a rotary nozzle 3, a turbine member 4 and a bearing 5.

The body 1 comprises a compressed air connection 11 at the first end of the body and an air channel 12 passing through the body from the compressed air connection 11. The compressed air connection 11 consists of a thread to which, for example, a shaft portion of a pneumatic gun can be mounted. The air ducts 12 may be several, for example 3, and are arranged to direct the air flow to the turbine 4 to the outer periphery of the impeller 41. At one end of the body are fastening means 14 for fastening a fixed nozzle 2. There is also a recess 13 at one end of the body to which the turbine 4 can be fitted.

The body 1 is preferably a rotary piece having a diameter of the order of 15-20 mm. Compressed air connection thread is of class M5 - M6.

The stationary nozzle 2 is fitted at its first end to the body by a connecting member 21, such as a thread or other mechanical connection, which fits into the body mounting member 14. Air passages 22 are provided through which the compressed air is passed. Air ducts 22, of which there are 5, for example, conduct the air stream from the turbine to one end of the rotating nozzle 3 and at the same time to the other end of the fixed nozzle. The rotating nozzle 3 is arranged to rotate inside the fixed nozzle by means of a bearing 5 which is mounted in a bearing housing 23. The rotating nozzle is fitted at one end to a fixed nozzle, thereby providing a fit between the fixed nozzle bore 24 and the rotating nozzle surface 31. The rotary nozzle 3 and is centrally supported by a bearing 5 on a fixed nozzle. The bearing 5 is mounted on the bearing surface 32 of the rotating nozzle.

At the first end of the rotating nozzle there is provided a turbine part 4 which rotates by the force of the air flow. The turbine member 4 is fitted to the cylindrical end of the rotating member by a torque conveying connection such as compression, shrinkage! with adhesive bonding or with a form-fitting joint.

At one end of the rotating nozzle there are grooves 34 through which air flow is exited from the nozzle.

The turbine member 4 includes a hub 41 which is disposed on the axis 33 of the rotatable member. The turbine has an impeller 42 having blades at an angle B to the longitudinal axis of the compressed air nozzle. The wings can also be curved if desired.

Bearing 5 is preferably a rolling bearing such as a groove ball bearing or a needle bearing. The bearing has an inner diameter 51 disposed on a bearing surface 32 of a rotatable member and an outer diameter 53 disposed on a fixed nozzle bearing surface 23.

The compressed air nozzle according to the invention operates in two stages, in which, in the first stage, the air flow from the compressed air connection 11 is directed to rotate the turbine part 4 and the rotating nozzle connected therewith. Then, in a second step, the air flow is diverted along the fixed nozzle air channels 22 away from the compressed air nozzle. As it exits, airflow then passes through grooves 34 at one end of the rotating nozzle, further increasing the turbulence of the airflow. The turbulent flow of air is formed from the nozzle when released into a conical shape. In this case, the airflow of the nozzle connected to the pneumatic gun can be used to sweep the surfaces clean without making a handful of extra rotating or reciprocating movements.

The design of the interior of the compressed air nozzle can influence the turbulence of the outgoing air stream and the shape of the jet. Further, by changing the angle B of the impeller 4 and changing the geometry of the air passages 12 and 22, the torque and strain on the rotating nozzle can also be affected. For example, changing the elevation angle or other geometry of the grooves 34 at one end of the rotating nozzle produces jets of different shapes and turbulence. For example, selecting a slope angle of 0 to 10 degrees results in significantly different jets.

The outside of the compressed air nozzle is small. For example, the diameter is in the order of 15-20 mm and the length in the order of 25-30 mm. Because of the small size and the geometric shape of the parts, the fabrication of the parts requires advanced manufacturing methods. Depending on the materials selected, for example, additive fabrication, precision casting and other casting methods may be employed. 3D printing has been successfully applied in prototype manufacturing and product development.

The components are assembled as follows. First, the bearing 5 is mounted on the bearing surface 32 of the rotating nozzle, then the turbine member 4 is mounted on the rotating nozzle shaft 33. The subassembly formed by these parts 3, 5 and 4 2 by means of fastening means 14 and 21. The turbine part 4 then fits into a space consisting of a recess 13 in the body 1 and a space 25 at the first end of the fixed nozzle 2.

The figures and the description related thereto are intended only to illustrate the present invention. The compressed air nozzle according to the invention in detail and its structure may vary within the scope of the inventive idea set forth in the accompanying claims. It will be obvious to one skilled in the art that the dimensions of the invention and the technical solutions and material choices may vary depending on the intended use. The embodiment of the invention may vary within the operating conditions, customer needs and production methods.

Claims (5)

Suoiavaatimukset CLAIMS 1. Tryckluftsmunstycke för att styra en trycklufts stråle, rotation method (1), fast munstycke (2), roterande munstycke (3), turbindel (4) och ett lager (5), och av att en luftström i ett första steg har anordnats att lekpa genom en tryckluftsanslutning (11) och längs luftkanaler (12) till turbindelen (4) och i ett andra steg har luftströmmen anordnats att längs luftkanalerna (22) i det fasta munst ut ur tryckluftsmunstycket, och av att luftströmmen när den kommer ut Löper genom spår (34) i enaandan av det roterande munstycket (3), color luftströmmen är merbulent än innan det första steget. Compressed air nozzle for controlling a compressed air jet, characterized in that - it comprises a housing (1), a fixed nozzle (2), a rotating nozzle (3), a turbine part (4) and a bearing (5), and - that the air flow is (11) through the air passages (12) to the turbine part (4) and in a second step the air flow is arranged to pass along the air passages (22) of the fixed nozzle (2) and, when exiting, passes through the grooves at one end of the rotating nozzle 34) through which the airflow is more turbulent than before the first stage. 2. Tryckluftsmunstycke enligt skyddskrav 1, kännetecknat av att i stommen (1) tillhör en tryckluftsanslutningen (11) och ur tryckluftsanslutningen genom stommen loupande luftkanaler (12), och av att det fasta munstycör (2) har an nordn (2) har annordn ett passande förbindningsorgan (21), som en gänga eller annan mechanisk förbindning, och av att luftkanaler (22) har anordnats att pa av genome det fasta munstycket, genome vil tryckluften har anordnats att pa av, och av att roterande munstycket (3) har anordnats att att rotera inom det fasta munstycket med hjälp av lagret, och av att det roterande munstycket i enändan har anordnats i det fasta munstycket med en glidpassning och i mittpartiet stött med hjälp av lagret (5) mot det fasta munstycket, och av att det i första ändan av det roterande munstycket har anordnats en turbindel (4) som roterar genom kraften av luftströmmen, och av att det i andra ändan av det roterande munstycket finns spår (34) ), genomic luftströmmen warmnar munstycket. Compressed air nozzle according to Claim 1, characterized in that - the body (1) comprises a compressed air connection (11) and air ducts (12) passing through the compressed air connection, and - the fixed nozzle (2) is fitted to the body connecting member (14) ), such as by a thread or other mechanical connection, and - air passages (22) through which the compressed air is adapted to pass through a fixed nozzle, and - rotatable nozzle (3) arranged to rotate inside the fixed nozzle by means of a bearing, and - the rotating nozzle being fitted at one end to the fixed nozzle by a sliding fitting and centered by means of a bearing (5) on the fixed nozzle, and that - a turbine part (4) rotating by the air flow force is provided at the first end of the rotating nozzle; 34) through which the airflow exits the nozzle. Compressed air nozzle according to Claim 1 or 2, characterized in that the pitch of the grooves (34) is in the range of 0-10 degrees. Compressed air nozzle according to one of Claims 1 to 3, characterized in that the air ducts (12) are arranged to direct the air flow to the outer circumference of the impeller (41) and that the air ducts (22) are arranged to direct the air flow through the grooves (34). Compressed air nozzle according to one of Claims 1 to 4, characterized in that the bearing (5) is a groove ball bearing. SKYDDSKRAV 3. Tryckluftsmunstycke enligt skyddskrav 1 eller 2, kännetecknat av att spårens (34) stigningsvinkel and grade 0-10 grader. 4. Tryckluftsmunstycke enligt något av skyddskraven 1-3, kännetecknat av att luftkanalema (12) har anordnats att styra luftströmmen till den yttre peripheral (4) skövlar (41), och av luftkanalerna (22) har lordnats spåren (34). 5. Tryckluftsmunstycke enligt något av skyddskraven 1-4, kännetecknat av att lagret (5) and spårkullager.