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CN-122014603-A - Sine wave pump with blocking slider and method of manufacture

CN122014603ACN 122014603 ACN122014603 ACN 122014603ACN-122014603-A

Abstract

The invention relates to a blocking slider (38) for a pump, comprising a rotor contact zone (48), which rotor contact zone (48) is designed to bear against a wave-shaped rotor ring of the pump, wherein the rotor contact zone (48) comprises a side rotor contact surface (50), which is designed to bear against a side surface of the rotor ring in each case, and an upper rotor contact surface (52), which is designed to bear against a radially outward shell surface of the rotor ring, wherein the side rotor contact surfaces (50) are each realized as conically rounded surfaces, wherein a first radius of curvature (R 1 ) in a lower region of the side rotor contact surface (50), which is remote from the upper rotor contact surface (52), is smaller than a second radius of curvature (R 2 ) in an upper region of the side rotor contact surface (50), which is adjacent to the upper rotor contact surface (52).

Inventors

  • Frank Danbacher

Assignees

  • 沃森马洛股份有限公司马索辛事业部

Dates

Publication Date
20260512
Application Date
20251111
Priority Date
20241111

Claims (12)

  1. 1. A blocking slide (38) for a pump (10), comprising: a rotor contact zone (48), the rotor contact zone (48) being designed to abut against a wave-shaped rotor ring (18) of the pump (10), wherein the rotor contact zone (48) comprises: A side rotor contact surface (50), which side rotor contact surface (50) is designed to bear in each case against a side surface of the rotor ring (18), and An upper rotor contact surface (52), said upper rotor contact surface (52) being designed to abut against a radially outward shell surface of said rotor ring (18), Wherein the side rotor contact surfaces (50) are each realized as conically rounded surfaces, wherein a first radius of curvature (R 1 ) of the side rotor contact surfaces (50) in a lower region remote from the upper rotor contact surface (52) is smaller than a second radius of curvature (R 2 ) of the side rotor contact surfaces (50) in an upper region adjacent to the upper rotor contact surface (52).
  2. 2.A pump (10) having: a rotor (14), the rotor (14) being rotatable about an axis of rotation and comprising a rotor hub (16) and a rotor ring (18) extending radially from the rotor hub (16) and rotating in a wave-like manner, A pump housing (12), the pump housing (12) and the rotor (14) together forming a pump chamber (20), the pump chamber (20) connecting a first inlet/outlet chamber and a second inlet/outlet chamber, and A blocking device (22), said blocking device (22) being arranged between said first inlet/outlet chamber and said second inlet/outlet chamber and comprising a blocking slider (38), said blocking slider (38) blocking said pump chamber (20) axially on both sides of said rotor collar (18), Wherein the blocking slider (38) has side rotor contact surfaces (50), each side rotor contact surface (50) abutting against a side surface of the rotor ring (18) and having an upper rotor contact surface (52), the upper rotor contact surface (52) abutting against a radially outward shell surface of the rotor ring (18), Wherein the side rotor contact surfaces (50) of the blocking slider (38) are each realized as conically rounded surfaces, wherein a first radius of curvature (R 1 ) of the side rotor contact surfaces (50) in a radially inner region adjacent to the rotor hub (16) is smaller than a second radius of curvature (R 2 ) of the side rotor contact surfaces (50) in a radially outer region adjacent to the upper rotor contact surface (52).
  3. 3. The pump (10) of claim 2 wherein the upper rotor contact surface (52) of the blocking slider (38) is concave curved having a third radius of curvature (R 3 ) corresponding to the radius of curvature of the radially outward shell surface of the rotor ring (18).
  4. 4. A pump (10) according to claim 2 or 3, wherein the lower rotor contact surface (54) of the blocking slider (38) is in contact with a radially outward shell surface of the rotor hub (16), and wherein the lower rotor contact surface (54) of the blocking slider (38) is concave curved with a fourth radius of curvature (R 4 ) corresponding to the radius of curvature of the radially outward shell surface of the rotor hub (16).
  5. 5. Pump (10) according to any one of claims 2 to 4, wherein the blocking slider (38) is made of plastic material and comprises a housing (42) and a stiffener (44) such that a cavity (46) is formed within the blocking slider (38).
  6. 6. Pump (10) according to claim 5, wherein the housing (42) of the blocking slider (38) and/or the stiffener (44) is made of a plastic material having a glass fiber content, such as glass fiber reinforced polyamide.
  7. 7. Pump (10) according to claim 4 or 5, wherein at least some cavities (46) of the blocking slider (38) are filled with a filling material.
  8. 8. A method for manufacturing a blocking slider (38) for a sine wave pump (10), comprising: Providing a glass fiber reinforced plastic material suitable for processing by injection molding; -manufacturing the blocking slider (38) by injection moulding the glass fiber reinforced plastic material, wherein the blocking slider (38) has a rotor contact area (48), the rotor contact area (48) comprising: A side rotor contact surface (50), which side rotor contact surface (50) is designed to bear in each case against a side surface of the rotor ring (18), and An upper rotor contact surface (52), said upper rotor contact surface (52) being designed to abut against a radially outward shell surface of said rotor ring (18), Wherein the side rotor contact surfaces (50) are each realized as conically rounded surfaces, wherein a first radius of curvature (R 1 ) of the side rotor contact surfaces (50) in a lower region remote from the upper rotor contact surface (52) is smaller than a second radius of curvature (R 2 ) of the side rotor contact surfaces (50) in an upper region adjacent to the upper rotor contact surface (52).
  9. 9. The method of claim 1, wherein the step of manufacturing the blocking slider (38) by injection molding the glass fiber reinforced plastic material includes manufacturing the blocking slider (38) with a housing (42) and with at least one stiffener (44) located within the housing (42) such that a cavity (46) is formed within the housing (42), and wherein the method further comprises: -filling the cavity (46) within the blocking slider (38) with a filling material.
  10. 10. A method for manufacturing a blocking slider (38) for a sine wave pump (10), comprising: Providing a plastic material suitable for processing by injection molding, wherein the plastic material is approved for food applications only during the injection molding process; -manufacturing the blocking slider (38) by injection moulding the plastic material.
  11. 11. The method of claim 10, wherein the plastic material is a fiberglass reinforced plastic material.
  12. 12. The method of claim 10 or 11, wherein the step of manufacturing the blocking slider (38) by injection molding comprises manufacturing the blocking slider (38) with a housing (42) and with at least one stiffener (44) located within the housing (42) such that a cavity (46) is formed within the housing (42), and wherein the method further comprises: -filling the cavity (46) within the blocking slider (38) with a filling material.

Description

Sine wave pump with blocking slider and method of manufacture Technical Field The present invention relates to a sine wave pump and a method of manufacturing a blocking slider for a sine wave pump. Sine wave pumps are characterized by a rotor having a ring that extends radially and rotates in a wave or sine wave manner. In the pump housing, a common inlet and outlet chamber is provided in which a blocking means is formed which engages around the rotor ring and prevents backflow of the fluid to be pumped in the common inlet and outlet chamber. The blocking means may comprise a blocking slider placed on the rotor collar and having a slot through which the rotor collar slides. Background Such sliders are usually milled from a plastic blank. In order to seal the pump chamber, it must be ensured that the best possible (fluid-tight) contact between the slide and the rotor ring is achieved. However, milling the slide only allows in each case a flat contact surface to be produced. Disclosure of Invention It is therefore an object of the present invention to provide an improved barrier device for a sine wave pump and an improved method of manufacture, which can further reduce the backflow of fluid to be pumped. Another object of the present invention is to provide a method of manufacturing a blocking slider that can be used in a pump in the food industry. These objects are achieved by a blocking slide according to claim 1, a pump according to claim 2 and a method of manufacturing according to claim 8 or claim 10. According to one embodiment, a blocking slider for a pump (such as a sine wave pump) includes a rotor contact zone designed to abut a wave-shaped rotor ring of the pump. The blocking slider may be a generally cuboid-shaped member provided with a slot on one side, which slot forms the rotor contact zone and is designed to be placed on the rotor collar. The rotor contact zone comprises side rotor contact surfaces which are designed to abut against the side surfaces of the rotor ring in each case, and an upper rotor contact surface which is designed to abut against the radially outward shell surface of the rotor ring. The side rotor contact surfaces and the upper rotor contact surfaces thus form the aforementioned groove in the blocking slide, which groove can be placed on the rotor collar and in contact with the rotor collar during pump operation in order to seal the pump chamber and prevent backflow of the fluid to be conveyed from the outlet region to the inlet region. The side rotor contact surfaces are each realized as conically rounded surfaces, wherein a first radius of curvature in a lower region of the side rotor contact surfaces remote from the upper rotor contact surface is smaller than a second radius of curvature in an upper region of the side rotor contact surfaces adjacent to the upper rotor contact surface. This allows a large area contact between the side rotor contact surface and the wave rotor ring, since in the radially outwardly extending wave rotor ring the radially inner region has a shorter circumference and thus a larger wave curvature than the radially outer region of the wave stretching along a longer circumference. According to another embodiment, the pump is provided with a rotor rotatable about a rotational axis, the rotor comprising a rotor hub and a rotor ring extending radially from the rotor hub in a wave-like manner, a pump housing forming together with the rotor a pump chamber connecting the first inlet/outlet chamber with the second inlet/outlet chamber, and a blocking device arranged between the first inlet/outlet chamber and the second inlet/outlet chamber and comprising blocking slides blocking the pump chamber in axial direction on both sides of the rotor ring. Such a sine wave pump is particularly useful for food delivery because the pump chamber is easy to clean and because by arranging the pump chamber between the radially outer side of the rotor and the pump housing contamination of the fluid to be pumped by e.g. lubricating oil or wear particles from the drive shaft or drive unit of the pump can be avoided. The blocking slider has side rotor contact surfaces which each abut against a side surface of the rotor ring and also has an upper rotor contact surface which abuts against a radially outward housing surface of the rotor ring. The side rotor contact surfaces of the blocking slide are each realized as conically rounded surfaces, wherein a first radius of curvature in a radially inner region of the side rotor contact surfaces, which is close to the rotor hub, is smaller than a second radius of curvature in a radially outer region of the side rotor contact surfaces, which is close to the upper rotor contact surface. Thus, a smooth contact can be achieved over the entire radial extent of the rotor ring, so that the blocking slide effectively prevents an undesired backflow of fluid against the flow direction of the pump. According to a further embodiment, the upper r