Sharp spiral rotor with replaceable rubber rotor

Abstract

The invention discloses a replaceable rubber rotor tip spiral rotor which comprises a spiral rotor set, the spiral rotor set comprises a spiral rotor body, three first clamping grooves are formed in the outer surface of the spiral rotor body, and second clamping grooves are formed in the ends, close to the center of the spiral rotor body, of the three first clamping grooves. According to the spiral rotor with the replaceable rubber rotor tip, after the rotor tip fastener and the rubber rotor tip body are in threaded connection and fixed through the first hexagon socket cap screw, the combination of the rubber rotor tip body and the rotor tip fastener is sleeved with the second clamping groove; the first fastener pop-rivet and the second fastener pop-rivet are clamped into the fastening groove of the rotor tip fastener, and finally the second hexagon socket cap screw is screwed in to enable the rubber rotor tip body to be attached and fixed to the spiral rotor body, so that the rubber rotor tip body can be independently replaced without disassembling a pump body and a spiral rotor set, the maintenance space is small, and the maintenance cost is low. Compared with traditional overall replacement, the single-time maintenance cost is reduced, and the maintenance time is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-efficiency energy-saving pulse-free equipment, and in particular relates to a replaceable rubber rotor tip spiral rotor. BACKGROUND

[0002] In the field of fluid conveying equipment, the Knirow rotor pump is a kind of low-speed, high-lift positive displacement volumetric pump, and its working principle is as follows: the prime mover transmits power to the speed reducer of the pump through the shaft coupling, drives the rotor to make synchronous reverse motion through the driving shaft and the synchronous gear, forms the suction chamber, the closed chamber and the discharge chamber, and realizes the medium conveying by the vacuum effect of the suction chamber when the rotor rotates. This kind of pump has low speed, strong self-priming capacity, can make high viscosity medium fully fill the cavity, and has small gap between the rotor and the inner wall of the pump cavity, high volumetric efficiency, strong adaptability to different viscosity media, and the symmetrical structure also makes it have direction reversibility.

[0003] However, the rotor structure of the existing rotor pump still has the following problems: 1. The traditional straight-tooth rotor or full-rubber-coated rotor has low medium filling efficiency when rotating, and the medium filling amount is less than 1 / 5 when the straight-tooth cam rotates 60°, and still cannot be completely discharged when rotating 180°, resulting in low conveying efficiency and strong pulsation; 2. The sealing performance of the metal material rotor or the straight-tooth rubber rotor is insufficient, and the self-priming height of the pump is usually less than 5 meters, which cannot meet the working condition requirement of an inlet and outlet height difference of greater than or equal to 10 meters; 3. The existing rotor is mostly of integral structure, and when the rotor tip is worn, the spiral rotor needs to be replaced as a whole, which not only needs to disassemble the pump body and occupy a maintenance space of greater than or equal to 1m³, but also has high replacement cost and long time for single maintenance. Therefore, we propose a replaceable rubber rotor tip spiral rotor. SUMMARY

[0004] The main purpose of the present application is to provide a replaceable rubber rotor tip spiral rotor, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A replaceable rubber rotor tip spiral rotor, comprising: A spiral rotor group, the spiral rotor group comprising a spiral rotor body, the outer surface of the spiral rotor body being provided with three first clamping grooves, each of the three first clamping grooves being provided with a second clamping groove at one end close to the center of the spiral rotor body, and the center of the front end of the spiral rotor body being provided with a mounting shaft hole; A rotor tip group, the rotor tip group comprising a rubber rotor tip body, the inner wall surface of the rubber rotor tip body being provided with a sleeve groove; The rotor tip group further comprises a rotor tip fastener, a first fastener puller, a second fastener puller, a first inner hexagonal cylindrical head screw and a second inner hexagonal cylindrical head screw, the first inner hexagonal cylindrical head screw is provided with two, the two first inner hexagonal cylindrical head screws are respectively threadedly connected in the corresponding two mounting holes, the first fastener puller is sleeved in the corresponding second clamping groove and clamped in the corresponding fastening groove, the second fastener puller is clamped in the corresponding fastening groove, and the second inner hexagonal cylindrical head screw passes through the rotor tip fastener and the second fastener puller and is threadedly connected with the first fastener puller. The sleeve groove is provided with a threaded blind hole corresponding to the first inner hexagonal cylindrical head screw, and the rotor tip fastener is provided with two mounting holes and two fastening grooves.

[0006] As a further improvement of the above-mentioned scheme, the spiral rotor body is a spiral cam structure, the spiral angle is 30°-60°, and the sealing gap between the spiral rotor group and the cavity of the pump body is 0.1-0.3mm.

[0007] As a further improvement of the above-mentioned scheme, the first clamping groove and the second clamping groove are circumferentially distributed along the outer surface of the spiral rotor body, and the depth of the first clamping groove and the second clamping groove is 5-10mm.

[0008] As a further improvement of the above-mentioned scheme, the rubber rotor tip body adopts butadiene-acrylonitrile rubber material, fluororubber material or ethylene-propylene-diene rubber material, and the outer surface of the rubber rotor tip body is a circular arc structure.

[0009] As a further improvement of the above-mentioned scheme, the material of the spiral rotor body is stainless steel.

[0010] Compared with the prior art, the present application has the following beneficial effects: 1、In the present application, the spiral rotor body adopts a cam structure with a spiral angle of 30°-60°, compared with a straight-toothed rotor, the medium conveying amount is more than 2 / 5 (less than 1 / 5 for a straight-toothed rotor) when rotating 60°, and the medium in the cavity can be completely discharged when rotating 180°, the conveying efficiency is improved, the continuous pushing characteristics of the spiral surface completely eliminate the pulsation phenomenon of the straight-toothed rotor, the medium conveying is more stable, the sealing gap between the spiral rotor group and the cavity of the pump body is controlled to be 0.1-0.3mm, the elastic deformation of the rotor tip made of butadiene-acrylonitrile rubber, fluororubber or ethylene-propylene-diene rubber material forms a self-suction capacity, and the medium conveying demand under high fall conditions is met. 2、In the application, the rubber rotor tip body is installed by gap fitting of the sleeve groove plus the threaded connection of the two first inner hexagonal head screws, the rotor tip fastener is gap fitted with the first clamping groove of the spiral rotor body, after the first inner hexagonal head screw is used for threaded connection to fix the rotor tip fastener and the rubber rotor tip body, the combination of the rubber rotor tip body and the rotor tip fastener is sleeved into the second clamping groove, then the first fastener pull pin and the second fastener pull pin are clamped into the fastening groove of the rotor tip fastener, finally the second inner hexagonal head screw is screwed in, so that the rubber rotor tip body is fixed on the spiral rotor body, the multiple locking structure, without disassembling the pump body and the spiral rotor group, the rubber rotor tip body can be replaced alone, the maintenance space is small, the single maintenance cost is lower than that of the traditional overall replacement, the maintenance time is shortened, the first clamping groove and the second clamping groove are circumferentially distributed with a depth of 5-10mm, the shear resistance of the fastener is enhanced, and the rubber rotor tip body is ensured not to fall off during high-speed rotation; 3、In the application, the spiral rotor body is made of stainless steel, which has strong corrosion resistance, the rubber rotor tip body is made of butadiene-acrylonitrile rubber, fluorine rubber or ethylene-propylene-diene rubber, which has high elasticity and wear resistance, the service life is prolonged when conveying the medium containing particles, the arc-shaped outer surface design reduces the medium flow resistance, further improves the conveying efficiency, the cooperation of the installation shaft hole and the transmission shaft ensures the transmission of the spiral rotor group, the synchronous gear box with a 1:1 transmission ratio drives the two rotors to rotate in reverse directions synchronously, the axial thrust formed by the spiral lift angle cooperates with the volume change of the sealing chamber, and high-efficiency continuous pushing of the medium is realized. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0011] Figure 1 It is an overall structure schematic diagram of the spiral rotor of the present application with replaceable rubber rotor tip; Figure 2 It is a structure schematic diagram of the spiral rotor group of the spiral rotor of the present application with replaceable rubber rotor tip; Figure 3 It is a structure schematic diagram of the rotor tip group of the spiral rotor of the present application with replaceable rubber rotor tip; Figure 4 It is a structure schematic diagram of the spiral rotor of the present application with replaceable rubber rotor tip; Figure 3 It is an enlarged view of structure A in the spiral rotor of the present application with replaceable rubber rotor tip; Figure 5 It is an enlarged view of structure B in the spiral rotor of the present application with replaceable rubber rotor tip. Figure 3

[0012] ​In the diagram: 1. Helical rotor assembly; 2. Rotor tip assembly; 11. Helical rotor body; 12. First slot; 13. Second slot; 14. Mounting shaft hole; 21. Rubber rotor tip body; 22. First fastener rivet; 23. Rotor tip fastener; 24. Second fastener rivet; 25. Sleeve groove; 26. Mounting hole; 27. First socket head cap screw; 28. Fastening groove; 29. ​​Second socket head cap screw. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0014] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0017] Example A replaceable rubber rotor tip helical rotor, such as Figures 1-5 As shown, it includes: The spiral rotor assembly 1 includes a spiral rotor body 11. Three first slots 12 are provided on the outer surface of the spiral rotor body 11. A second slot 13 is provided at one end of each of the three first slots 12 near the center of the spiral rotor body 11. A mounting shaft hole 14 is provided at the center of the front end of the spiral rotor body 11. The rotor tip assembly 2 includes a rubber rotor tip body 21, and the inner wall surface of the rubber rotor tip body 21 is provided with a sleeve groove 25. The rotor tip set 2 further comprises a rotor tip fastener 23, a first fastener pull 22, a second fastener pull 24, a first inner hexagonal head screw 27 and a second inner hexagonal head screw 29, the first inner hexagonal head screw 27 is provided with two, the two first inner hexagonal head screws 27 are respectively threadedly connected in the corresponding two mounting holes 26, the first fastener pull 22 is sleeved in the corresponding second clamping groove 13 and clamped in the corresponding fastening groove 28, the second fastener pull 24 is clamped in the corresponding fastening groove 28, and the second inner hexagonal head screw 29 passes through the rotor tip fastener 23 and the second fastener pull 24 and is threadedly connected with the first fastener pull 22. The sleeve groove 25 is provided with a threaded blind hole corresponding to the first inner hexagonal head screw 27, and the rotor tip fastener 23 is provided with two mounting holes 26 and two fastening grooves 28.

[0018] In the embodiment, the spiral rotor body 11 is in a spiral cam structure, the spiral angle is 30°-60°, the sealing gap between the spiral rotor set 1 and the cavity of the pump body is 0.1-0.3 mm, the first clamping groove 12 and the second clamping groove 13 are distributed in the circumferential direction of the outer surface of the spiral rotor body 11, and the depth of the first clamping groove 12 and the second clamping groove 13 is 5-10 mm; the rubber rotor tip body 21 is made of butadiene-acrylonitrile rubber material, fluororubber material or ethylene-propylene-diene rubber material, and the outer surface of the rubber rotor tip body 21 is in a circular arc structure; and the material of the spiral rotor body 11 is stainless steel.

[0019] In the installation of the embodiment, the mounting shaft hole 14 of the spiral rotor set 1 is sleeved on the transmission shaft, the spiral direction of the spiral rotor body 11 is ensured to be consistent with the transmission direction of the synchronous gear box, the sleeve groove 25 of the rubber rotor tip body 21 is gap-fitted with the rotor tip fastener 23, the rotor tip fastener 23 is gap-fitted with the first clamping groove 12 of the spiral rotor body 11, the first inner hexagonal head screw 27 is screwed into the rubber rotor tip body 21 through the mounting hole 26, the rotor tip fastener 23 is clamped into the first clamping groove 12, the rotor tip fastener 23 is ensured to be circumferentially attached to the first clamping groove 12, the fastening groove 28 on one side of the rotor tip fastener 23 is clamped on the first fastener pull 22, the second fastener pull 24 is clamped in the fastening groove 28 on the other side of the rotor tip fastener 23, and then the second inner hexagonal head screw 29 is threadedly connected with the first fastener pull 22.

[0020] In use, the embodiment synchronously drives the screw rotor set 1 through the transmission shaft, and the two screw rotor bodies 11 rotate in opposite directions at a 1:1 transmission ratio. The helix angle causes the rotor to generate axial thrust when rotating, which pushes the medium along the pump cavity. The rubber rotor tip body 21 is installed through the gap fit of the sleeve groove 25 and the threaded connection of the two first inner hexagonal head screws 27, and the rotor tip fastener 23 is gap fitted with the first clamping groove 12 of the screw rotor body 11. The mechanical locking of the first fastener pull pin 22, the second fastener pull pin 24, the first inner hexagonal head screw 27, and the second inner hexagonal head screw 29 ensures that the rubber rotor tip body 21 does not fall off during high-speed rotation, while allowing individual replacement. The helical cam structure of the screw rotor body 11 forms a sealed chamber with the rubber rotor tip body 21 of the adjacent rotor and the pump cavity when rotating. As the rotor rotates, the chamber volume gradually decreases from the inlet to the outlet, achieving continuous pushing of the medium. The screw rotor can transport more than 2 / 5 of the medium in 60° rotation, and completely discharge the medium in 180° rotation, improving efficiency and eliminating pulsation.

[0021] When replacing the embodiment, stop the machine and cut off the power source. Use an inner hexagonal wrench to remove the second inner hexagonal head screw 29, pull out the first fastener pull pin 22 and the second fastener pull pin 24, remove the rubber rotor tip body 21, then remove the two first inner hexagonal head screws 27, remove the rotor tip fastener 23, clean the first clamping groove 12, the second clamping groove 13, and the outer surface of the screw rotor body 11, install a new rubber rotor tip body 21, and reverse the above installation steps to complete the replacement.

[0022] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A changeable rubber rotor tip helical rotor characterized by, The utility model relates to a screw rotor set (1) and a rotor tip set (2) for a rotary vane pump. The screw rotor set (1) comprises a screw rotor body (11) having three first clamping grooves (12) on the outer surface thereof, each of the first clamping grooves (12) having a second clamping groove (13) at the end close to the center of the screw rotor body (11), and an installation shaft hole (14) at the center of the front end of the screw rotor body (11). The rotor tip set (2) comprises a rubber rotor tip body (21) having a sleeve groove (25) on the inner wall surface thereof. The rotor tip set (2) further comprises a rotor tip fastener (23), a first fastener pull pin (22), a second fastener pull pin (24), a first inner hexagonal cylindrical head screw (27), and a second inner hexagonal cylindrical head screw (29). The first inner hexagonal cylindrical head screw (27) is provided with two, and the two first inner hexagonal cylindrical head screws (27) are respectively threadedly connected to the corresponding two installation holes (26). The first fastener pull pin (22) is sleeved in the corresponding second clamping groove (13) and clamped in the corresponding fastening groove (28). The second fastener pull pin (24) is clamped in the corresponding fastening groove (28). The second inner hexagonal cylindrical head screw (29) passes through the rotor tip fastener (23) and the second fastener pull pin (24) and is threadedly connected to the first fastener pull pin (22). The sleeve groove (25) has a threaded blind hole corresponding to the first inner hexagonal cylindrical head screw (27). The rotor tip fastener (23) has two installation holes (26) and two fastening grooves (28).

2. A changeable rubber rotor tip helical rotor according to claim 1, characterized in that, The screw rotor body (11) is in a spiral cam structure with a helix angle of 30°-60°. The sealing gap between the screw rotor set (1) and the cavity of the pump body is 0.1-0.3 mm.

3. A changeable rubber tip helical rotor according to claim 1, characterized in that, The first clamping grooves (12) and the second clamping grooves (13) are distributed circumferentially along the outer surface of the screw rotor body (11), and the depth of the first clamping grooves (12) and the second clamping grooves (13) is 5-10 mm.

4. A changeable rubber tip helical rotor according to claim 1, wherein, The rubber rotor tip body (21) is made of butyl rubber material, fluororubber material, or ethylene-propylene-diene rubber material. The outer surface of the rubber rotor tip body (21) is in a circular arc structure.

5. A changeable rubber tip helical rotor according to claim 1, wherein, The screw rotor body (11) is made of stainless steel.

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