Blade, rotor and positive displacement pump

Abstract

The utility model relates to a vane, rotor and positive displacement pump, the vane comprises a front side part, a rear side part, at least one contact surface and at least two non-contact surfaces, the contact surface comprises at least one guide surface and at least one cutting surface, and the vane can be provided by the same material piece for the whole vane.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of vane, rotor and positive displacement pump for positive displacement pump. Specifically, the utility model relates to a kind of vane for positive displacement pump, the vane can be transported or pumped to material outlet from material inlet to material, and the vane can cut or grind at least a part of the material to be pumped. BACKGROUND

[0002] Positive displacement pump is the pump of the following type: the pump is arranged to move material by capturing a fixed amount of material and then forcing the captured material into a discharge outlet or material outlet of the pump. These types of pumps can produce a continuous flow of material by repeatedly capturing and expelling discrete amounts of material, thereby providing a constant and predictable flow rate.

[0003] Rotary vane pump is a kind of positive displacement pump for moving materials such as fluid, solid or gas. Rotary vane pump operates by using a series of vanes that rotate within a cylindrical cavity (pump chamber). As the vanes rotate, they create expanding and contracting chambers within the pump chamber, thereby drawing in and expelling the material to be pumped.

[0004] Rotary vane pump generally includes a pump chamber and a rotor. The rotor is provided with one or more vanes. The pump chamber includes a material inlet and a material outlet.

[0005] Rotary vane pump includes a cylindrical cavity (pump chamber) and a rotor (sometimes referred to as an impeller) eccentrically mounted within the cylindrical cavity (pump chamber). The rotor is offset from the center of the pump chamber and can form a crescent-shaped space between the rotor and the inner wall of the pump chamber.

[0006] The rotor of the rotary vane pump can include one or more slots that accommodate individual vanes. These vanes can generally be made of metal or plastic, and the vanes can slide in the slots and outside the slots, and stay between the rotor and the inner wall of the pump chamber.

[0007] To avoid the material to be pumped by the rotary vane pump being stuck between the vanes and the edges of the one or more slots in the rotor that accommodate individual vanes, a wear strip can be provided to protect the vanes and to reduce the amount of material to be pumped being stuck.

[0008] The pump chamber can be provided with a material inlet and a material outlet. When the pump is running, the material inlet is connected to a material feeding device that feeds the material to be pumped, and the material outlet is connected to a device that needs to deliver fluid.

[0009] During operation, the rotor rotates, and the vanes can be tensioned to maintain contact with the inner wall of the pump chamber as the rotor rotates. This tensioning force can be provided by springs, gravity, centrifugal force, or a combination thereof, causing the vanes to move in the provided slots and slide outward to abut against the inner surface of the pump chamber. This forms an expansion chamber on the inlet side of the pump and a contraction chamber on the outlet side.

[0010] As the rotor rotates, material can be drawn into the expansion chamber through the material inlet, for example due to a vacuum created by an increase in volume, or material is fed to the chamber and captured by the vanes. As the rotor continues to rotate, the expansion chamber moves toward the outlet side of the pump. This movement decreases the volume of the cavity and compresses the material and forces the material out through the material outlet.

[0011] Due to the movement of the vanes in the slots, the vanes can provide a seal between the expansion chamber and the contraction chamber to prevent backflow of material within the pump chamber.

[0012] Rotary vane pumps are known for their efficiency, reliability, and ability to handle a variety of materials such as fluids, solids, and gases. Rotary vane pumps are commonly used in applications such as automotive fuel systems, HVAC systems, vacuum packaging, printing presses, the food or feed industry, the beverage industry, the fish processing industry, and the rendering industry.

[0013] However, the construction of currently available vane and positive displacement pumps is difficult, cumbersome, time-consuming, and costly. Furthermore, currently available vane and positive displacement pumps are not suitable for the fish processing industry or the rendering industry, as, in addition to the pumping effect, a certain degree of cutting and grinding can also contribute to improving the flow of the material to be pumped.

[0014] Therefore, there is an industrial need for an improved vane for a positive displacement pump and the positive displacement pump itself. In particular, there is an industrial need for a vane for a positive displacement pump (and the positive displacement pump itself) that is faster, easier, more efficient, and less costly to produce, and that can perform a certain degree of cutting and grinding on the material to be pumped, and that is suitable for use in the rendering industry. Invention content

[0015] Therefore, the purpose of the present invention relates to a vane for a positive displacement pump, a rotor, and a positive displacement pump itself, which vane is capable of transporting or pumping material from a material inlet to a material outlet, and which vane is capable of cutting or grinding at least a portion of the material to be pumped.

[0016] In particular, it is an object of the present utility model to provide a vane, a rotor and / or a positive displacement pump which solves the above-mentioned problems in the prior art in terms of speed, processing requirements, efficiency and the ability to provide a certain degree of cutting or grinding of the material to be pumped, and which can be applied in the oil refining industry.

[0017] Therefore, one aspect of the present utility model relates to a vane for a positive displacement pump, wherein the vane comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces, and the contact surface comprises at least one guide surface and at least one cutting surface, wherein the vane can be provided by the same piece of material as a whole.

[0018] Another aspect of the present utility model relates to a vane for a positive displacement pump, which comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces, and the contact surface comprises at least one guide surface and at least one cutting surface, wherein the vane can be provided by the same piece of material as a whole.

[0019] Another aspect of the present utility model relates to a vane for a positive displacement pump, wherein the vane substantially comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces, and the contact surface comprises at least one guide surface and at least one cutting surface.

[0020] Another aspect of the present utility model relates to a vane for a positive displacement pump, which comprises at least one contact surface, and the contact surface comprises at least one guide surface and at least one cutting surface, wherein the cutting width of the at least one cutting surface is smaller than the guide width of the at least one guide surface.

[0021] Another aspect of the present utility model relates to a rotor, which comprises at least one through opening, wherein the at least one through opening is configured to receive a vane.

[0022] Another aspect of the present utility model relates to a positive displacement pump, which comprises a vane according to the present utility model or a rotor according to the present utility model.

[0023] Another aspect of the present utility model relates to a positive displacement pump, which comprises a material inlet fluidly connected to a pump body having a pump chamber, and the pump body can be fluidly connected to a material outlet, wherein the material outlet is a circular material outlet.

[0024] Another aspect of the present utility model relates to a positive displacement pump, which comprises a material inlet fluidly connected to a pump body having a pump chamber, and the pump body can be fluidly connected to a material outlet, wherein the pump body comprises an inspection hole.

[0025] A further aspect of the utility model relates to a system for processing materials, preferably an oil refinery system or a fish processing industry, wherein the system comprises a vane according to the utility model, a rotor according to the utility model and / or a positive displacement pump according to the utility model.

[0026] The utility model will be described in more detail below. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A rotor (17) according to the utility model is shown. The rotor (17) comprises a drive end (20), a rotor body (21) and a non-drive end (23). The rotor body is between the drive end (20) and the non-drive end (23). The drive end (20) can be coupled to a moving element, such as a motor. The rotor body (21) is an element of the rotor (17) that holds the two vanes (1), wherein the part of the vane (1) extending from the rotor body (21) constitutes a blade (19) of the vane (1) and Figure 1 The rotor (17) shown in the middle comprises 2 vanes (1) and 4 blades (19) for moving the material to be pumped when the rotor (17) is installed in a positive displacement pump, such as a rotary vane pump. The non-drive end (23) is at the opposite end of the drive end and elevates the rotor (17) and can support the rotation of the rotor (17). The rotor (17) can be assembled by welding without the use of screws or bolts. The non-drive end comprises one or more welding recesses (24) for welding the non-drive end to the rotor body. The installed vane (1) comprises a contact surface (4) and a non-contact surface (5), wherein the contact surface (4) is provided for moving the material to be pumped and the contact surface (4) can be in contact with the inner wall of the pump chamber of the positive displacement pump, such as a rotary vane pump.

[0028] Figure 2An exploded view of a rotor (17) according to the present application is shown. The rotor (17) comprises a drive end portion (20), a rotor body (21) and a non-drive end portion (23). The rotor body is interposed between the drive end portion and the non-drive end portion. The rotor body (21) is provided with two vanes (1) comprising a front side portion (2), a rear side portion (3), two contact surfaces (4) and two non-contact surfaces (5). The vanes (1) are provided with a U-shaped cut-out, thereby forming an opening at the front side portion and the rear side portion of the vane. During assembly, the U-shaped portions of the two vanes (1) are assembled together, and when mounted in the rotor and when the rotor is mounted in a positive displacement pump, the vanes (1) are allowed to move relative to each other, as the vanes rotate in the pump chamber, without colliding with each other, without wearing against each other and without blocking each other. The contact surfaces (4) comprise two guide surfaces and one cutting surface located between the two guide surfaces. The contact surfaces (4) are arranged for moving the material to be pumped, and the contact surfaces can be in contact with the inner walls of the pump chamber of a positive displacement pump, such as a rotary vane pump. It can be seen from Figure 1 that the vanes (1) do not comprise a wear strip conventionally used between the vane (1) and the through opening (18).

[0029] When assembled, the U-shaped portions of the two vanes (1) are merged, and the assembled vanes (1) are pushed into the two through openings (18) of the rotor body (21). The through openings (18) pass through the rotor body perpendicular to the axial direction of the rotor, and allow the vanes (1) to extend from both sides of the periphery of the rotor body (21). The two through openings (18) are spaced apart and at 90 degrees to each other. When assembling the rotor (17), a retaining ring (22) can be placed in a groove (not shown) around the centerline of the rotor body (21), which can help to retain the vanes in the through openings (18). The non-drive end portion (23) is then placed at the end of the rotor body (21) and is fixed in a welded recess (24) by welding.

[0030] Figure 3 A subset of a vane (1) according to the present application is shown. The vane (1) comprises a front side portion (2), a rear side portion (3), a contact surface (4) and a non-contact surface (5). The contact surface (4) comprises a contact width (9), which can be the part of the vane (1) that can be in contact with the inner walls of a positive displacement pump (not shown). The contact width (9) can be equal to or less than the vane width (6). The contact surface (5) can comprise a cutting surface (8) and a guide surface (7). The contact width (9) of the contact surface (4) can comprise a cutting width (10) of the cutting surface (8) and a guide width (11) of the guide surface (7). The cutting width (10) is less than the guide width (11).

[0031] Figure 4A subset of views of a vane (1) according to the present utility model are shown. The vane (1) includes a front side (2), a back side (3), a contact surface (4), and a non-contact surface (5). The contact surface (4) includes a contact width (9), which can be the portion of the vane (1) that can contact the inner wall of a positive displacement pump (not shown). The contact width (9) is less than the vane width (6). The contact width (9) of the contact surface (5) can include a cut width (10) of the cut surface (8) and a guide width (11) of the guide surface (7). The contact surface (5) includes a cut surface (8) that is offset relative to the guide surface (7) and relative to the centerline along the length of the contact surface (5). The cut surface (8) is offset and flush with the front side (2). The cut surface (8) extends no more than the guide surface (7) from the vane (1).

[0032] Figure 5 A positive displacement pump (25) with a rotor (17) according to the present utility model is shown. The positive displacement pump (25) includes a material inlet (27), a pump body with a pump chamber (not visible), and a material outlet (26). The positive displacement pump (25) includes a square material inlet (27) and a circular material outlet (26). The pump body includes an inspection hole (29) allowing easy access to the interior of the positive displacement pump (25), to the pump chamber (not visible), the material inlet (27), and / or the material outlet (26). The rotor (17) includes a power end (20) and a rolling end (23), a rotor body, and vanes are located within the pump body.

[0033] Figure 6 A positive displacement pump (25) without a rotor is shown. The positive displacement pump (25) includes a material inlet (27) fluidly connected to a pump body, the pump body includes a pump chamber (28), and the pump body can be fluidly connected to a material outlet (26), where the material outlet (26) is a circular material outlet. The pump body includes an inspection hole (29) allowing easy access to the interior of the positive displacement pump (25), to the pump chamber (28), the material inlet (27), and / or the material outlet (26). DETAILED DESCRIPTION

[0034] Accordingly, the inventors of the present utility model have found that by changing the structure of the vanes of a positive displacement pump, material can be transported or pumped from the material inlet to the material outlet faster, easier, and more efficiently, and the production cost of the pump can be lower, the vane (and the positive displacement pump) can provide a certain degree of cutting and grinding of the material to be pumped, and the vane is suitable for use in the oil refining industry.

[0035] The inventors have also found that a simplified rotor structure will make the construction and maintenance of the rotor faster, more efficient, and cheaper.

[0036] By providing a new construction of a positive displacement pump, the inventors of the present utility model have found that the pump can be produced and maintained in a more cost-effective and easier manner, and the pump is easier to install and does not compromise the functionality, efficiency and strength of the pump.

[0037] The preferred embodiment of the present utility model relates to a vane for a positive displacement pump, wherein the vane comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces, and the contact surface comprises at least one guide surface and at least one cutting surface, wherein the vane can be provided by a single piece of material with respect to the entire vane.

[0038] Preferably, the vane can be made of a single piece of material.

[0039] The preferred embodiment of the present utility model relates to a vane for a positive displacement pump, wherein the vane substantially comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces, and the contact surface comprises at least one guide surface and at least one cutting surface.

[0040] Preferably, the present utility model relates to a vane for a positive displacement pump, wherein the vane comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces, and the contact surface comprises at least one guide surface and at least one cutting surface.

[0041] The vane of the present utility model can comprise a cutting width of the at least one cutting surface, which can be greater than, equal to or less than a guide width of the at least one guide surface. Preferably, the vane according to the present utility model can comprise a cutting width of the at least one cutting surface, which can be less than a guide width of the at least one guide surface.

[0042] The embodiment of the present utility model relates to a vane for a positive displacement pump, which comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces.

[0043] In another embodiment of the present utility model, the vane according to the present utility model can comprise a front side, a rear side, a contact surface and three non-contact surfaces.

[0044] In yet another embodiment of the present utility model, the vane according to the present utility model can comprise a front side, a rear side, two contact surfaces and two non-contact surfaces.

[0045] The front side and the rear side can have the same size. The front side and the rear side can have the same shape.

[0046] The width of the at least one contact surface (contact width) can be the same as or smaller than the width of the at least two non-contact surfaces (vane width).

[0047] The contact surface can comprise a cutting surface and at least one guiding surface.

[0048] The contact width of the contact surface can comprise a cutting width of the cutting surface and a guiding width of the at least one guiding surface. Preferably, the cutting width is different from the guiding width.

[0049] The cutting width of the at least one cutting surface can preferably be smaller than the guiding width of the at least one guiding surface.

[0050] In an embodiment of the utility model, the guiding width can be the same as or smaller than the blade width. Preferably, the guiding width can be smaller than the blade width.

[0051] A preferred embodiment of the utility model relates to a blade for a positive displacement pump, the blade comprising at least one contact surface, the contact surface comprising at least one guiding surface and at least one cutting surface, wherein the cutting width of the at least one cutting surface can be smaller than the guiding width of the at least one guiding surface.

[0052] The blade can be described as a three-dimensional structure having dimensions in three directions perpendicular to each other or substantially perpendicular to each other.

[0053] The blade according to the utility model can be defined as a three-dimensional structure having a width, a length and a depth, such as a plate or plate-like structure.

[0054] The blade of the utility model can be a plate or plate-like structure having a width, a length and a depth.

[0055] Preferably, the blade comprises 6 side portions, a front side portion, a rear side portion, at least one contact surface and at least two (or three) non-contact surfaces.

[0056] The depth of the blade, preferably of the blade having two contact surfaces, can be determined by the distance from one contact surface of the blade to the opposite contact surface.

[0057] The depth of the blade according to the utility model can be configured to be substantially the same as the diameter of the pump chamber of the positive displacement pump. Preferably, the term "substantially the same" can relate to the depth of the blade can be in the range of 10% to 0.001% smaller than the diameter of the pump chamber of the positive displacement pump, such as 8% to 0.05%, such as 6% to 0.1%, such as 4% to 0.5%, such as 2% to 0.75%, such as about 1%.

[0058] Preferably, the outer edge of the blade according to the utility model can be the portion of the blade that is in contact with or closest to the inner wall of the pump chamber of the positive displacement pump.

[0059] The outer edge can comprise a contact surface. Preferably, the outer edge of the blade can comprise a contact surface and thus comprise a guiding surface and / or a cutting surface.

[0060] In an embodiment of the utility model, the guiding surface and the cutting surface can be laterally offset relative to each other, and / or the guiding surface and the cutting surface can be longitudinally offset relative to each other.

[0061] Preferably, the guiding surface and the cutting surface can not be laterally offset relative to each other, and / or the guiding surface and the cutting surface can not be longitudinally offset relative to each other.

[0062] In an embodiment of the utility model, the cutting surface and the guiding surface can be centrally placed along the length of the contact surface.

[0063] In another embodiment of the utility model, the cutting surface or the guiding surface can be centrally placed along the length of the contact surface.

[0064] In yet another embodiment of the utility model, the cutting surface or the guiding surface can be offset from the center line along the length of the contact surface.

[0065] When the cutting surface or the guiding surface can be offset from the center line along the length of the contact surface, the offset can be along the entire blade width.

[0066] When the blade comprises two contact surfaces, the two contact surfaces can be identical (the cutting surface or the guiding surface is not offset), or the cutting surface, the guiding surface, or both the cutting surface and the guiding surface can be offset from the center line along the length of the contact surface.

[0067] When observing the outer edge of the blade, the length of the blade can preferably be the longer of the blade lengths. Preferably, when the blade can be mounted in a rotor and when the rotor can be mounted in a positive displacement pump, the length of the blade can be determined to be parallel or substantially parallel to the rotational axis of the rotor.

[0068] The inventors of the utility model have surprisingly found that in a positive displacement pump, the guiding surface and the cutting surface provide different functions, which can be optimized independently and separately to provide improved functionality, such as improved effectiveness, improved productivity, improved strength, and a reduction in the impact on the environment due to reduced energy consumption. Thus, the inventors of the utility model have unexpectedly found that by providing at least one cutting surface, the cutting width of which is smaller than the guiding width of the at least one guiding surface, the production and application of the blade can be improved.

[0069] In the present context, the terms "guiding width" and / or "cutting width" can be used to describe the shorter side of the guiding surface and the cutting surface of the blade as well as the outer edge of the blade.

[0070] In an embodiment of the present utility model, the blade can comprise two contact surfaces.

[0071] The two contact surfaces can be a first contact surface and a second contact surface.

[0072] Preferably, the first contact surface and the second contact surface are directed in opposite directions towards each other.

[0073] In an embodiment of the present utility model, the contact surface (or each of the first and second contact surfaces) according to the present utility model can comprise two guiding surfaces and one cutting surface. Preferably, the cutting surface can be located between the two guiding surfaces.

[0074] In another embodiment of the present utility model, the length of the guiding surface can be shorter than the length of the cutting surface.

[0075] The length of the guiding surface can comprise the combined length of all (preferably two) guiding surfaces on the outer edge of the blade.

[0076] In an embodiment of the present utility model, the guiding width of the guiding surface can be smaller than the blade width.

[0077] When the blade width is larger than the guiding width, the blade can be provided with a shape that does not come into contact with the inner wall of the pump chamber of the positive displacement pump when in use.

[0078] The blade width can preferably be wider than the cutting width. Preferably, a cutting cavity can be provided between the cutting surface and the front side and / or the rear side of the blade.

[0079] The advantage of such a cutting cavity is that the material being cut during pumping can be more easily removed from the contact between the cutting surface and the material inlet into the pump chamber of the positive displacement pump.

[0080] In an embodiment of the present utility model, the blade comprises the same material throughout the blade.

[0081] The same material can mean that the outer edge of the blade according to the present utility model can not be provided with a reinforced wear material for increasing the wear resistance of one or more contact surfaces of the blade.

[0082] A preferred embodiment of the present utility model relates to a blade for a positive displacement pump, wherein the blade comprises a front side, a rear side, at least one contact surface and at least two non-contact surfaces, and the contact surface comprises at least one guiding surface and at least one cutting surface, wherein the blade can be made of the same piece of material throughout the blade.

[0083] In the embodiment of the utility model, the blade consists essentially of identical pieces of material throughout the blade.

[0084] In the context of the utility model, the identical pieces of material throughout the blade can relate to individual pieces of material throughout the blade or composite or layered pieces of material combined by welding or soldering.

[0085] The blade according to the utility model can be made of a single piece of material.

[0086] The single piece of material can relate to a blade that is not composite or layered, but exists as a cohesive and homogeneous whole. Preferably, the single piece of material according to the utility model does not comprise any welds or solder. Preferably, the single piece of material can relate to a blade provided by identical pieces of material throughout the blade.

[0087] Preferably, the blade according to the utility model does not comprise any welds or solder.

[0088] The term "consists essentially of can relate to limiting the scope of a feature or claim to the specified feature or step, as well as features or steps not mentioned that do not materially affect the basic and novel characteristic(s) of the claimed utility model.

[0089] In the embodiment of the utility model, the contact surface can be curved.

[0090] Preferably, the curved structure of the contact surface (and of the cutting surface and / or of the guide surface) can form an upwardly convex structure. Preferably, the upwardly convex structure can be convex upwardly over the entire length of at least one guide surface (preferably over 2 guide surfaces) and / or over the entire length of the cutting surface.

[0091] The upwardly convex structure can be formed from the front side of the blade, through the contact surface, to the rear side of the blade.

[0092] The cutting width of the cutting surface can be curved. The guide width of the at least one guide surface can be curved. The cutting width of the cutting surface and the guide width of the at least one guide surface can be curved.

[0093] When the contact surface is curved, the contact surface can comprise:

[0094] - a base width describing the distance from the start point to the end point,

[0095] - a start point defining the point at which the curvature structure of the contact surface begins,

[0096] - an end point defining the point at which the curvature structure of the contact surface ends,

[0097] - a curvature length; and

[0098] - a curvature height.

[0099] If the contact surface does not have a starting point and an end point at the blade front side portion and the blade rear side portion, a connecting portion can be provided to ensure a continuous smooth surface of the blade and the blade structure.

[0100] Preferably, the connecting portion can be provided at an angle ranging from 90 degrees to 180 degrees (relative to the blade front side portion and / or the blade rear side portion), for example, an angle ranging from 95 degrees to 170 degrees, for example, an angle ranging from 100 degrees to 160 degrees, for example, an angle ranging from 110 degrees to 150 degrees, for example, an angle ranging from 120 degrees to 140 degrees, for example, an angle ranging from 125 degrees to 135 degrees.

[0101] In an embodiment of the utility model, the base width of the guide surface can be greater than the base width of the cutting surface.

[0102] In an embodiment of the utility model, the curvature height of the guide surface is less than the curvature height of the cutting surface.

[0103] The curvature length of the guide surface can be greater than the curvature length of the cutting surface.

[0104] Preferably, the curved portion of the contact surface can be a circular contact surface or an elliptical contact surface.

[0105] The radius of the circular contact surface can be the same as or less than the radius of the inner wall of the pump chamber of the positive displacement pump into which the blade can be inserted. Preferably, the radius of the circular contact surface can be less than the radius of the inner wall of the pump chamber of the positive displacement pump into which the blade can be inserted.

[0106] The blade according to the utility model can be provided with a cutout, thereby forming an opening in the front side portion and the rear side portion of the blade.

[0107] The cutout allows at least two blades to be installed in the rotor, each blade having two opposite contact surfaces.

[0108] Due to the cutout, when the rotor is installed in the positive displacement pump, the two (at least two) blades installed in the rotor are allowed to move relative to each other when the blades rotate in the pump chamber, without colliding with each other, without wearing each other, and without blocking each other.

[0109] The provided cutout can cause the U-shaped blade to form an opening in one of the non-contact surfaces and lead to the front side portion and the rear side portion.

[0110] Preferably, the blade according to the utility model can be made of a metal or a ceramic material.

[0111] The rotor and / or the blade according to the utility model preferably does not comprise a wear strip.

[0112] The wear strip can be a profile, preferably a metal profile, which is typically placed between the blade and the edge of the slot for receiving the blade on the rotor, to reduce contamination of the open space present in the through opening of the rotor after the blade is installed. Preferably, the wear strip is placed parallel or substantially parallel to the length of the contact surface of the blade along the front and rear side, and preferably along the entire length of the contact surface of the blade.

[0113] In an embodiment of the utility model, the rotor and / or the blade can not be provided with any wear strip.

[0114] The preferred embodiment of the utility model relates to a rotor comprising at least one through opening, wherein the at least one through opening can be configured to receive a blade.

[0115] When the blade is installed in the rotor, the blade can pass through the through opening, thereby allowing the installed blade to extend from the periphery of the rotor, preferably from both openings of the rotor.

[0116] The rotor according to the utility model can comprise a drive end, a rotor body and a non-drive end. The rotor body can be located between the drive end and the non-drive end.

[0117] In an embodiment of the utility model, the rotor can comprise a drive end, a rotor body, a retaining ring and a non-drive end. The rotor body can be located between the drive end and the non-drive end. The retaining ring can be located between the rotor body and the drive end, between the rotor body and the non-drive end, or one retaining ring can be located between the rotor body and the drive end, and the retaining ring can be located between the rotor body and the non-drive end. Preferably, the retaining ring can be located between the rotor body and the non-drive end.

[0118] The drive end can be configured to engage with a mobile element, such as a motor. The motor can preferably be an electric motor.

[0119] The rotor body can be an element of the rotor responsible for retaining one or more blades of the rotor that are responsible for moving the material to be pumped.

[0120] The retaining ring can be provided in the rotor for increasing the strength of the rotor body between the through openings, and ensuring that the rotor body does not collapse and lock the blades, thereby reducing the sliding function of the blades in the through openings.

[0121] The non-drive end can be the end of the rotor opposite the drive end. Preferably, the non-drive end can not be coupled with the motor, but can lift the rotor and can support the rotation of the rotor.

[0122] In embodiments of the utility model, the rotor can be assembled without using screws or bolts. Preferably, the drive end portion, the rotor body and the non-drive end portion can be assembled without using screws or bolts.

[0123] Preferably, the non-drive end portion and the rotor body are assembled by welding, and / or the drive end portion and the rotor body are assembled by welding.

[0124] Preferably, the drive end portion and / or the non-drive end portion can comprise one or more welding recesses for welding the drive end portion and / or the non-drive end portion to the rotor body. Preferably, the drive end portion or the non-drive end portion can comprise the same number of welding recesses as the number of knives of the rotor.

[0125] In embodiments of the utility model, the drive end portion or the non-drive end portion can comprise 2 or more welding recesses. In another embodiment of the utility model, the drive end portion or the non-drive end portion can comprise 4 or more welding recesses. In another embodiment of the utility model, the drive end portion or the non-drive end portion can comprise 6 or more welding recesses. Preferably, the drive end portion or the non-drive end portion can comprise 4 welding recesses.

[0126] In another embodiment of the utility model, at least one blade can be mounted in at least one through opening of the rotor.

[0127] Preferably, the blade mounted in the through opening of the rotor can be a blade as described herein.

[0128] The at least one through opening according to the utility model can be configured to receive at least one blade.

[0129] The rotor can be provided with one through opening for each blade to be inserted.

[0130] In embodiments of the utility model, the rotor comprises 1 through opening and is mounted with 1 blade. In another embodiment of the utility model, the rotor comprises 2 through openings and is mounted with 2 blades.

[0131] For each blade inserted into the through opening of the rotor, 2 knives for moving the material to be pumped can be provided. Thus, for a rotor comprising 2 through openings and 2 blades (one blade for each through opening), 4 knives can be provided.

[0132] In this context, the term "knife" or "knives" can be used to define one or more portions of the blade extending from the rotor towards the inner surface of the pump chamber.

[0133] In an embodiment of the utility model, the rotor can include two through openings for receiving the vanes: a first through opening for receiving a first vane and a second through opening for receiving a second vane.

[0134] The rotor can include a first through opening for receiving the first vane and a second through opening for receiving the second vane, wherein the first vane and the second vane each include a cutout, preferably in one of the non-contact surfaces and leading to the front side and the rear side.

[0135] When the two vanes (each including a cutout) are subsequently mounted in the rotor, the cutout of the first vane faces the cutout of the second vane, and the two vanes are merged, thereby forming a rotor of 4 knives.

[0136] The rotor according to the utility model can include two vanes, each vane including a cutout, and the cutout can preferably point in the longitudinal direction of the rotor (preferably relative to the rotation of the rotor).

[0137] In an embodiment of the utility model, the two knives of the rotor are provided by the vane according to the utility model. The two knives extend from the center of the rotor. Preferably, the two knives of the vane can extend from the circumference of the rotor (for example, towards the inner surface of the pump chamber).

[0138] When the rotor is mounted in the positive displacement pump, the cutouts of the two vanes mounted in the rotor allow the two vanes to move in and out of the through openings relative to each other when the rotor rotates, without colliding with each other, without wearing each other and without blocking each other.

[0139] Preferably, at least one through opening can include a through opening width and a through opening length corresponding to the width and the length of the vane according to the utility model.

[0140] In an embodiment of the utility model, the through opening width is greater than the width of the vane by a range of 0.1% to 50%, for example, by a range of 0.3% to 40%, for example, by a range of 0.5% to 30%, for example, by a range of 0.75% to 20%, for example, by a range of 1.0% to 15%, for example, by a range of 1.5% to 10%, for example, by a range of 2% to 7%, for example, by a range of 2.5% to 5%, for example, by a range of 3% to 4%.

[0141] In another embodiment of the present utility model, the length of the through opening is in the range of 0.1% to 50% greater than the length of the blade, for example, in the range of 0.3% to 40% greater, for example, in the range of 0.5% to 30% greater, for example, in the range of 0.75% to 20% greater, for example, in the range of 1.0% to 15% greater, for example, in the range of 1.5% to 10% greater, for example, in the range of 2% to 7% greater, for example, in the range of 2.5% to 5% greater, for example, in the range of 3% to 4% greater.

[0142] The rotor of the present utility model can comprise at least one through opening, for example, at least two through openings, for example, at least three through openings, for example, at least four through openings.

[0143] In a preferred embodiment of the present utility model, the rotor can comprise two blades.

[0144] The rotor of the present utility model can comprise at least one blade, for example, at least two blades, for example, at least three blades, for example, at least four blades.

[0145] The two blades provided in the rotor can provide four knife-like pieces for moving the material to be pumped.

[0146] In an embodiment of the present utility model, the rotor can comprise at least one through opening, wherein at least one blade can be inserted into the at least one through opening and provide two knife-like pieces extending from the rotor.

[0147] The at least one blade can be preferably movably mounted in the rotor according to the present utility model.

[0148] In an embodiment of the present utility model, the movement of the one or more blades in the through opening of the rotor is not initiated, controlled or provided by a spring or the like.

[0149] The rotor according to the present utility model can comprise a lubrication inlet for introducing oil into the through opening, thereby allowing the blade to move smoothly and easily. Preferably, the lubrication inlet can be placed at the non-driving end of the rotor.

[0150] A preferred embodiment of the present utility model relates to a positive displacement pump comprising a blade as described herein or a rotor as described herein.

[0151] The positive displacement pump according to the present utility model can comprise a material inlet, a pump body having a pump chamber and a material outlet.

[0152] The positive displacement pump can comprise a square material inlet and a circular material outlet, or a square material inlet and a square material outlet, or a circular material inlet and a circular material outlet. Preferably, the positive displacement pump can comprise a square material inlet and a circular material outlet.

[0153] The preferred embodiments of the present utility model relate to a positive displacement pump comprising a material inlet fluidly connected to a pump body having a pump chamber, and the pump body can be fluidly connected to a material outlet, wherein the material outlet is a circular material outlet.

[0154] The positive displacement pump comprises a material inlet fluidly connected to a pump body having a pump chamber, and the pump body can be fluidly connected to a material outlet, wherein the material outlet is a circular material outlet.

[0155] In the present context, the term "fluidly connected" means that the material to be pumped can be transferred from the material inlet to the pump chamber and from the pump chamber to the material outlet.

[0156] In embodiments of the present utility model, the pump body can comprise an inspection hole. The inspection hole can allow easy access to the interior of the positive displacement pump, to the pump chamber, the material inlet and / or the material outlet.

[0157] The preferred embodiments of the present utility model relate to a positive displacement pump comprising a material inlet fluidly connected to a pump body having a pump chamber, and the pump body can be fluidly connected to a material outlet, wherein the pump body comprises an inspection hole.

[0158] The inspection hole can be covered when not in use, for example by a removable plate.

[0159] In embodiments of the present utility model, the cutting surface of the vane can be configured to have a length equal to or substantially equal to the length of the material inlet of the positive displacement pump.

[0160] The one or more guiding surfaces of the vane can be configured to have a length equal to or substantially equal to the length of the inner wall of the pump chamber minus the length of the material inlet of the positive displacement pump.

[0161] The actual equality can involve a difference of 10% or less, for example 8% or less, for example 6% or less, for example 4% or less, for example 2% or less, for example 1% or less, from the length of the material inlet of the positive displacement pump.

[0162] The positive displacement pump can be a rotary vane pump or a lamella pump.

[0163] The positive displacement pump according to the present utility model can preferably be used in the oil refining industry.

[0164] Preferably, the positive displacement pump according to the present utility model can be arranged for moving waste food, poultry innards, feathers, bones, fish, meat or combinations thereof.

[0165] The preferred embodiment of the utility model relates to a system for processing material, preferably an oil refining system, wherein the system comprises a blade according to the utility model, a rotor according to the utility model and / or a positive displacement pump according to the utility model.

[0166] It should be noted that the embodiments and features described in the context of one of the aspects of the utility model are also applicable to the other aspects of the utility model.

[0167] Reference signs

[0168] (1) blade

[0169] (2) front side

[0170] (3) rear side

[0171] (4) contact surface

[0172] (5) non-contact surface

[0173] (6) blade width

[0174] (7) guide surface

[0175] (8) cutting surface

[0176] (9) contact width

[0177] (10) cutting width

[0178] (11) guide width

[0179] (12) not used

[0180] (13) not used

[0181] (14) not used

[0182] (15) not used

[0183] (16) not used

[0184] (17) rotor

[0185] (18) through opening

[0186] (19) knife

[0187] (20) drive end

[0188] (21) rotor body

[0189] (22) retaining ring

[0190] (23) non-drive end

[0191] (24) weld recess

[0192] (25) Positive displacement pump

[0193] (26) Material inlet

[0194] (27) Material outlet

[0195] (28) Pump chamber

[0196] (29) Inspection hole.

Claims

1. A blade (1) for use in a positive displacement pump, characterized in that, The blade (1) includes a front side (2), a rear side (3), at least one contact surface (4) and at least two non-contact surfaces (5), and the contact surface (4) includes at least one guide surface (7) and at least one cutting surface (8), wherein the blade (1) can be provided from the same material for the whole blade (1).

2. The blade (1) according to claim 1, characterized in that, The blade (1) is provided from a single material component.

3. The blade (1) according to claim 1 or 2, characterized in that, The cutting width (10) of the at least one cutting surface (8) is smaller than the guiding width (11) of the at least one guiding surface (7).

4. A blade (1) for use in a positive displacement pump, characterized in that, The blade (1) includes a front side (2), a rear side (3), at least one contact surface (4) and at least two non-contact surfaces (5), and the contact surface (4) includes at least one guide surface (7) and at least one cutting surface (8).

5. The blade (1) according to claim 4, characterized in that, The cutting width (10) of the at least one cutting surface (8) is smaller than the guiding width (11) of the at least one guiding surface (7).

6. A rotor (17) comprising at least one through opening (18), characterized in that, The at least one through opening (18) is configured to receive the blade (1).

7. The rotor (17) according to claim 6, characterized in that, The rotor (17) includes a driving end, a rotor body, and a non-driving end.

8. The rotor (17) according to claim 7, characterized in that, The driving end and / or the non-driving end may include one or more welding recesses for welding the driving end and / or the non-driving end to the rotor body.

9. The rotor (17) according to claim 7 or 8, characterized in that, The non-driving end and the rotor body are assembled by welding, and / or the driving end and the rotor body are assembled by welding.

10. The rotor (17) according to claim 7 or 8, characterized in that, The drive end, the rotor body, and the non-drive end can be assembled without the use of screws or bolts.

11. The rotor (17) according to claim 6, characterized in that, The rotor includes a driving end, a rotor body, a retaining ring, and a non-driving end.

12. The rotor (17) according to claim 11, characterized in that, The retaining ring is positioned between the rotor body and the driving end, between the rotor body and the non-driving end, or a retaining ring can be positioned between the rotor body and the driving end, and a retaining ring can be positioned between the rotor body and the non-driving end.

13. The rotor (17) according to any one of claims 6 to 8 and 11 to 12, characterized in that, At least one blade (1) is installed in the at least one through opening (18) of the rotor (17).

14. The rotor (17) according to any one of claims 6 to 8 and 11 to 12, characterized in that, At least one blade (1) is a blade (1) according to any one of claims 1 to 5.

15. The rotor (17) according to any one of claims 6 to 8 and 11 to 12, characterized in that, The rotor includes at least one through opening (18), wherein at least one blade (1) is inserted in the at least one through opening (18), and the blade (1) is provided with two blade-shaped members (19) extending from the rotor (17).

16. The rotor (17) according to any one of claims 6 to 8 and 11 to 12, characterized in that, The rotor and / or the blades may be provided without any wear-resistant strips.

17. A positive displacement pump (25), characterized in that, The positive displacement pump (25) includes a blade (1) according to any one of claims 1 to 5 or a rotor (17) according to any one of claims 6 to 16.

18. A positive displacement pump (25) comprising a material inlet (27) fluidly connected to a pump body having a pump chamber (28), and the pump body being fluidly connected to a material outlet (26), characterized in that, The material outlet (26) is a circular material outlet (26).

19. The positive displacement pump (25) according to claim 18, characterized in that, The pump body includes an inspection port (29).

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