Hose pump rotor

Abstract

The invention discloses a hose pump rotor, and particularly relates to the field of hose pumps, the hose pump rotor comprises a rotor seat connected with a rotor shaft and a rolling wheel arranged at the radial outward free end of a rotor support arm, the rotor seat and the rotor support arm are in a plate shape, a strip-shaped hole is formed in the rotor support arm, and the penetrating direction of the strip-shaped hole is parallel to the axial direction of the rotor shaft; a threaded hole is formed in the plate surface, facing the side where the rotor bracket arm is located, of the rotor seat; the faying surface of the rotor seat and the rotor bracket arm is vertical to the axial direction of the rotor and is in concave-convex inlay fit with the faying surface; the size perpendicular to the radial direction of the rotor is reduced, and the light weight of the rotor is achieved.

Description

Technical Field

[0001] The invention relates to a hose pump, in particular to an improved structure of a hose pump rotor. Background Art

[0002] Hose pumps in the prior art are widely used in chemical and other industrial fields. Their basic structure includes a housing and a hose placed in the housing. A rotor support driven by a main shaft drives a roller to squeeze the hose to pump the medium.

[0003] The application entitled "Hose Pump Rotor" (document number CN106640608A, hereinafter referred to as Document 1) is a prior application of the applicant, in which a limit fit is formed between the roller support arm and the rotor seat for radial displacement, and the roller support arm and the rotor seat are fixedly connected by a locking component. The specific scheme is that the rotor seat is a groove-shaped groove formed by a base plate and side plates arranged on two opposite sides thereof, the base plate is fixedly connected to the main shaft, and the groove length direction of the groove cavity on the rotor seat is consistent with the radial direction of the main shaft. This scheme effectively solves the displacement of the roller support arm in the radial direction while providing the roller support arm with a reliable torque in the circumferential direction, and the roller support arm is locked and fixed to the adjusted position in the radial direction by connecting bolts. The solution provided in Document 1 has some shortcomings. For example, the three surfaces of the groove bottom and groove wall of the groove cavity on the rotor seat and the three surfaces that match the groove bottom and groove wall of the groove cavity of the rotor seat all need to be finely processed, so the fine processing amount is large and the requirements are high. In addition, considering that Document 1 was originally designed mainly for the needs of large-flow pumps, the design of the groove cavity part on the rotor seat must consume a lot of materials and have a large mass, and the energy consumption of the rotor during operation will also increase accordingly. Summary of the invention

[0004] The object of the present invention is to provide a hose pump rotor, aiming to optimize the structural scheme between the rotor seat and the roller support arm, reduce the size perpendicular to the radial direction of the rotor and realize the lightweight of the rotor.

[0005] The technical solution adopted by the present invention is: a hose pump rotor, including a rotor seat connected to the rotor shaft and a roller wheel arranged at the free end of the rotor support arm radially outward, the rotor seat and the rotor support arm are in the shape of a plate, and the rotor support arm is provided with a strip hole with a penetration direction parallel to the axial direction of the rotor shaft, and the long hole edge (long diameter direction) of the strip hole is parallel to the radial direction of the rotor shaft, and a threaded hole is arranged on the plate surface of the rotor seat facing the rotor support arm. The fastening bolt is inserted into the strip hole and connected to the threaded hole. The fitting surface of the rotor seat and the rotor support arm is perpendicular to the axial direction of the rotor and a concave and convex inlay is arranged on the fitting surface. The inlay guides the rotor support arm to move relative to the rotor seat in the radial direction, and the rotor support arm and the rotor seat constitute circumferential synchronous rotation.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] The rotor seat is arranged in a plate shape. On the one hand, the large-area fitting surface between the rotor seat and the rotor support arm is perpendicular to the rotor axis, and when the rotor seat and the support arm are fine-machined, only the surface where the rotor seat and the support arm contact each other needs to be machined, which greatly reduces the amount of fine-machining. On the other hand, compared with the arrangement of the two side groove walls forming the groove cavity on the rotor seat in the prior art, the present application does not arrange a corresponding groove cavity structure, thereby reducing the material and weight of the rotor seat itself, thereby reducing the energy consumption of the rotor when it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0009] Figure 2 is a cross-sectional view of the rotor in the radial direction of the rotor shaft in Example 1;

[0010] Figure 3 A three-dimensional diagram of a rotor support arm for fixing a roller pressing wheel in Example 1;

[0011] Figure 4 is a three-dimensional diagram of the assembled state of the rotor seat and the rotor support arm in Example 1;

[0012] Figure 5 is a three-dimensional diagram of the assembled state of the rotor seat and the rotor support arm in Example 2;

[0013] Figure 6 , Figure 7 , Figure 8 is a schematic structural diagram of the contact surface between the rotor seat and the rotor support arm in Example 2;

[0014] Fig. 9 It is a schematic diagram of the three-dimensional structure of the bolt gasket in the present invention. DETAILED DESCRIPTION

[0015] See also Figure 1-9 As shown, a hose pump rotor comprises a rotor seat 20 connected to a rotor shaft 10 and a roller 40 arranged at a free end of a rotor support arm 30 radially outward, characterized in that: the rotor seat 20 and the rotor support arm 30 are plate-shaped, a strip hole 31 is opened on the rotor support arm 30, and the long hole side major diameter direction of the strip hole 31 is parallel to the radial direction of the rotor shaft 10, a threaded hole 21 is arranged on the plate surface of the rotor seat 20 facing the rotor support arm 30, a fastening bolt 50 is inserted into the strip hole 31 and connected to the threaded hole 21, the fitting surface of the rotor seat 20 and the rotor support arm 30 is perpendicular to the rotor axial direction and a concave-convex inlay is arranged on the fitting surface, the inlay guides the rotor support arm 30 to move relative to the rotor seat 20 in the radial direction, and the rotor support arm 30 and the rotor seat 20 form a circumferential synchronous rotation;

[0016] In the above scheme, the rotor seat 20 is set to be in a plate shape. On the one hand, the large-area fitting surface between the rotor seat 20 and the rotor support arm 30 is perpendicular to the rotor axis. When the rotor seat 20 and the support arm 30 are fine-machined, only the surface where the rotor seat 20 and the support arm 30 contact each other needs to be machined, which greatly reduces the amount of fine-machining. On the other hand, compared with the prior art design in which convex strips are added to the two side edges parallel to the radial direction of the rotor seat to form the shape of the groove cavity, since the present application does not add convex strips to the two side edges parallel to the radial direction of the rotor seat 20, the fine-machining amount is reduced while reducing the weight of the rotor seat 20 itself, thereby reducing the energy consumption of the rotor when it is working.

[0017] A concave-convex inlay fit is arranged on the fitting surface of the rotor seat 20 and the rotor support arm 30. On the one hand, the concave-convex inlay fit is conducive to realizing the positioning of the rotor seat 20 and the rotor support arm 30 during assembly, ensuring that all the fastening bolts 50 can penetrate from the strip holes 31 on the rotor support arm 30 and enter into the threaded holes 21 on the rotor seat; on the other hand, the concave-convex inlay fit is used to guide the rotor support arm 30 to move relative to the rotor seat 20 in the radial direction, so that the rolling wheel 40 on the free end of the rotor support arm 30 can move to the rolling hose and cause the hose to be in an optimal deformation state.

[0018] The specific structure and implementation method of the above-mentioned concave-convex inlay matching are introduced below through two embodiments:

[0019] Example 1

[0020] like Figure 2-4 As shown, the rotor seat 20 is provided with a protrusion 22, and the protrusion 22 has a radial side surface 221 parallel to the radial direction of the rotor. The protrusion 22 is inserted into the strip hole 31, and the radial side surface 221 is abutted against a radial hole wall 311 of the strip hole 31 parallel to the radial direction of the rotor shaft 10; the relative sliding of the protrusion 22 in the strip hole 31 realizes the sliding fit between the rotor support arm 30 and the rotor seat 20 in the radial direction of the rotor shaft 10. When the rotor support arm 30 and the rotor seat 20 are fixed together by the fastening bolt 50 and rotated, due to the action of the protrusion 22, the fastening bolt 50 is mainly only subjected to the tensile force and avoids the action of the huge shear force derived from the torque, thereby increasing the service life of the fastening bolt 50.

[0021] The strip holes 31 are arranged at intervals of 2 to 4, and the threaded holes 21 are arranged corresponding to the number of the strip holes 31; in large and medium-sized hose pumps, the number of fastening bolts 50 is set to three as shown in the figure, which can basically meet the preload requirement. Therefore, preferably, the strip holes 31 are arranged in parallel with three, and the major diameter direction of the strip hole 31 at the middle position coincides with the radial direction; the hole core connection line of the threaded hole 21 is a broken line; when the threaded holes 21 and the strip holes 31 are respectively arranged in three corresponding ways, the hole core connection line of the three threaded holes 21 is a triangle, preferably an isosceles triangle, so that the contact surface between the rotor seat 20 plate surface and the rotor support arm 30 plate surface on both sides of the threaded hole 21 at the middle position is equal, and the fitting surface area between the rotor seat 20 and the rotor support arm 30 provided by the three fastening bolts 50 with the same preload force is significantly increased, ensuring that the static friction between the rotor seat 20 and the rotor support arm 30 is sufficient to resist the reaction force of the hose deformation to drive the rotor support arm 30 to move radially, that is, the radial position of the roller 40 is stable and reliable.

[0022] The protrusion 22 and the fastening bolt 50 located in the same strip hole 31 are arranged at intervals in the long diameter direction of the strip hole 31 to avoid interference between the protrusion 22 and the fastening bolt 50 .

[0023] In the above, the arrangement of the strip hole 31, on the one hand, forms a concave-convex inlay with the protrusion 22, realizes the preliminary positioning of the connection between the rotor seat 20 and the rotor support arm 30, and then the rotor support arm 30 generates a relative displacement on the rotor seat 20 along the radial direction of the rotor shaft 10, so that the force of the rolling wheel 40 rolling the hose reaches the best state; on the other hand, the strip hole 31 also provides an installation position for the installation of the fastening bolt 50 on the rotor support arm 30, avoiding the need to set a separate installation hole for connecting the fastening bolt 50, and ensuring the strength of the rotor support arm 30 itself. In addition, the arrangement of the strip hole 31 also correspondingly reduces the weight of the rotor seat 20 itself, thereby reducing the energy consumption of the rotor when it is working.

[0024] Example 2

[0025] like Figure 5-8 As shown, a groove 23 is provided on the plate surface of the rotor seat 20 facing the rotor support arm 30, and the groove length direction of the groove 23 is parallel to the radial direction. A convex strip 32 is provided on the rotor support arm 30 and embedded in the groove 23; the convex strip 32 slides relative to each other in the groove 23, so that the rotor support arm 30 and the rotor seat 20 can slide in the radial direction of the rotor shaft 10. At the same time, due to the effect of the convex strip 32, the fastening bolt 50 is mainly subjected to the tensile force and avoids the huge shear force derived from the torque, thereby increasing the service life of the fastening bolt 50.

[0026] Three strip holes 31 are arranged in parallel and at intervals, and the major diameter direction of the strip hole 31 at the middle position coincides with the radial direction; the threaded holes 21 are arranged in a corresponding manner to the number of the strip holes 31; the hole core connection line of the three threaded holes 21 is a broken line, preferably an isosceles triangle; the three fastening bolts 50 are respectively inserted into the three strip holes 31 and screwed into the corresponding threaded holes 21, at this time, the pre-tightening force provided by the three fastening bolts 50 is equal, which will significantly increase the fitting surface area between the rotor seat 20 and the rotor support arm 30, so that there is sufficient static friction between the rotor seat 20 and the rotor support arm 30 to resist the displacement of the rotor support arm 30 along the rotor radial direction after being subjected to the reaction force of the hose, so as to ensure the stability and reliability of the radial position of the roller 40.

[0027] In the short-diameter direction of the strip hole 31, the core line of the convex strip 32 is staggered or co-axially arranged with the long-diameter position of the strip hole 31; that is, the convex strip 32 can be arranged between two adjacent strip holes 31, such as Figure 7 It can also be arranged at one or both ends of the strip hole 31 in the direction of the long diameter to extend externally, such as Figure 8 As shown,

[0028] See also Fig. 9 As shown, in the present application, a bolt gasket 60 is further provided on the side of the rotor support arm 30 away from the rotor seat 20. The bolt gasket 60 is V-shaped as a whole, and may also be a curved profile. A through hole for the fastening bolt 50 to pass through is opened on the bolt gasket 60, and the fastening bolt 50 presses the bolt gasket 60 against the edge of the strip hole 31; the provision of the bolt gasket 60 enables the pre-tightening deformation of the bolt gasket 60 on the edge of the adjacent strip hole 31 to prevent the fastening bolt 50 from loosening, and further increases the contact area of ​​each contact surface around the fastening bolt 50, thereby increasing the friction between the contact surfaces at the connection position, and also increasing the interaction between the fastening bolts 50, so that the anti-loosening performance of the fastening bolt 50 is significantly improved.

Claims

1. A hose pump rotor, comprising a rotor seat (20) connected to a rotor shaft (10) and a roller (40) arranged at a free end of a rotor support arm (30) radially outward, characterized in that: The rotor seat (20) and the rotor support arm (30) are in the shape of plates. The rotor support arm (30) is provided with a strip hole (31) whose through direction is parallel to the axial direction of the rotor shaft (10). The long hole side (long diameter direction) of the strip hole (31) is parallel to the radial direction of the rotor shaft (10). A threaded hole (21) is provided on the plate surface of the rotor seat (20) facing the rotor support arm (30). A fastening bolt (50) is inserted into the strip hole (31) and connected to the threaded hole (21). The fitting surface of the rotor seat (20) and the rotor support arm (30) is perpendicular to the axial direction of the rotor and a concave-convex inlay is provided on the fitting surface. The inlay guides the rotor support arm (30) to move relative to the rotor seat (20) in the radial direction and the rotor support arm (30) and the rotor seat (20) form a circumferential synchronous rotation.

2. The hose pump rotor according to claim 1, characterized in that: The rotor seat (20) is provided with a protrusion (22), and the protrusion (22) has a radial side surface (221) parallel to the radial direction of the rotor. The protrusion (22) is inserted into the strip hole (31), and the radial side surface (221) is in abutting engagement with a radial hole wall (311) of the strip hole (31) parallel to the radial direction of the rotor shaft (10).

3. The hose pump rotor according to claim 1 or 2, characterized in that: The strip-shaped holes (31) are arranged at intervals of 2 to 4, and the threaded holes (21) are arranged in a corresponding number to the strip-shaped holes (31).

4. The hose pump rotor according to claim 3, characterized in that: The hole core connection line of the threaded hole (21) is a broken line.

5. The hose pump rotor according to claim 2, characterized in that: The protrusion (22) and the fastening bolt (50) located in the same strip-shaped hole (31) are arranged at intervals in the long diameter direction of the strip-shaped hole (31).

6. The hose pump rotor according to claim 3, characterized in that: Three of the strip-shaped holes (31) are arranged in parallel and at intervals, and the major diameter direction of the strip-shaped hole (31) at the middle position coincides with the radial direction.

7. The hose pump rotor according to claim 1, characterized in that: A groove (23) is arranged on the plate surface of the rotor seat (20) facing the rotor support arm (30), the groove length direction of the groove (23) is parallel to the radial direction, and a convex strip (32) is arranged on the rotor support arm (30) and embedded in the groove (23).

8. The hose pump rotor according to claim 7, characterized in that: Three strip-shaped holes (31) are arranged in parallel and at intervals, and the major diameter direction of the strip-shaped hole (31) at the middle position coincides with the radial direction.

9. The hose pump rotor according to claim 8, characterized in that: In the direction of the short diameter of the strip hole (31), the core line of the convex strip (32) and the long diameter of the strip hole (31) are staggered or arranged coaxially.

10. The hose pump rotor according to claim 1, characterized in that: A bolt washer (60) is arranged on one side of the rotor support arm (30) away from the rotor seat (20); the bolt washer (60) is V-shaped as a whole, and through holes for fastening bolts (50) to pass through are provided at both ends and the middle of the bolt washer (60).

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