CN115446369A

CN115446369A - Multi-cyclone rotor forming equipment and rotor manufactured by same

Info

Publication number: CN115446369A
Application number: CN202211058011.6A
Authority: CN
Inventors: 杨耀峰; 杨宇飞; 邓伟恩; 张德学
Original assignee: Guangdong Standard Fluid Systems Co ltd
Current assignee: Guangdong Standard Fluid Systems Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-12-09

Abstract

The invention relates to the technical field of screw pumps, and discloses multi-cyclone rotor forming equipment and a rotor manufactured by the same, wherein the equipment comprises: the machine tool is sequentially provided with a machine head and a tailstock along the front-back direction, the machine head is provided with a rotatable chuck, and the tailstock is provided with an ejector pin; the cyclone cutting assembly comprises a sliding seat, a cyclone milling device, a front-back moving mechanism used for limiting the front-back positions of the sliding seat and a machine tool and a left-right moving mechanism used for limiting the left-right positions of the cyclone milling device and the sliding seat, at least one cyclone milling device is rotationally driven to be provided with a plurality of radially outward outer cyclone milling cutters, and at least one cyclone milling device is rotationally driven to be provided with a plurality of radially inward inner cyclone milling cutters. The invention can simultaneously carry out rough machining and finish machining on the rotor blank so as to greatly improve the machining efficiency of the solid rotor and further reduce the machining cost of the solid rotor. Meanwhile, the invention also provides a rotor manufactured by the multi-cyclone rotor forming equipment.

Description

Multi-cyclone rotor forming equipment and rotor manufactured by same

Technical Field

The invention relates to the technical field of screw pumps, in particular to multi-cyclone rotor forming equipment and a rotor manufactured by the same.

Background

According to different application scenes, rotors of the screw pump can be divided into a hollow rotor and a solid rotor, wherein the hollow rotor can be processed by rolling forming equipment, and the solid rotor is generally cut by adopting cyclone milling forming equipment. For machining a solid rotor, a worker firstly needs to clamp a rotor blank in a chuck of a whirlwind milling forming device, the other end of the rotor blank is positioned by a thimble, and the subsequent machining steps can refer to the sections [0013] to [0019] in the machining device for the metal rotor of the screw oil well pump with the publication number of CN 208099352U. The solid rotor needs to be machined for multiple times due to large cutting amount of the solid rotor, but each whirling process needs to consume a large amount of time, so that the production period of the solid rotor is too long, and the manufacturing cost is extremely high.

Disclosure of Invention

The present invention is directed to a multi-cyclone rotor forming apparatus that solves one or more of the problems set forth in the prior art, and provides at least one useful alternative or inventive aspect.

The multi-cyclone rotor forming equipment according to the embodiment of the first aspect of the invention comprises:

the machine tool is sequentially provided with a machine head and a tailstock along the front-back direction, the machine head is provided with a rotatable chuck, and the tailstock is provided with an ejector pin;

the cyclone cutting assembly comprises two or more than two sliding seats, a front-back moving mechanism, a cyclone milling device and a left-right moving mechanism, the sliding seats are connected to the machine tool in a sliding mode along the front-back direction, any two adjacent sliding seats are arranged at intervals in the front-back direction, the relative position between each sliding seat and the machine tool is limited by the front-back moving mechanism, the cyclone milling device is connected to the sliding seats in a sliding mode along the left-right direction, the relative position between each cyclone milling device and each sliding seat is limited by the left-right moving mechanism, at least one cyclone milling device is rotationally driven to be provided with a plurality of outward cyclone milling cutters facing outwards in the radial direction, and at least one cyclone milling device is rotationally driven to be provided with a plurality of inward cyclone milling cutters facing inwards in the radial direction.

The multi-cyclone rotor forming equipment provided by the embodiment of the invention at least has the following beneficial effects: the machine head clamps the rotor blank through the chuck and provides rotating power for the rotor blank, the other end of the rotor blank is supported by the ejector pin, the rotor blank is cut in a single-point mode by using a plurality of external cyclone milling cutters due to large cutting amount during rough machining, the rotor blank is cut in a single-point mode by using a plurality of internal cyclone milling cutters due to small cutting amount during finish machining, and each time the rotor blank rotates for one circle, the cyclone milling device advances for one pitch distance at a constant speed within one circle of rotation of the rotor blank; compared with the prior art, the invention can simultaneously carry out rough machining and finish machining on the rotor blank so as to greatly improve the machining efficiency of the solid rotor and further reduce the machining cost of the solid rotor.

According to some embodiments of the invention, all the cyclone milling devices are provided with the rotation axes arranged in the front-back direction, the cutting points of the outer cyclone milling cutters are all located on the same circumference with the corresponding rotation axes as the central axes, and the cutting points of the inner cyclone milling cutters are all located on the same circumference with the corresponding rotation axes as the central axes, so as to ensure the machining precision of each cyclone milling device.

According to some embodiments of the invention, in order to realize the sliding connection between the sliding bases and the machine tool, the machine tool is provided with first sliding rails arranged along the front-back direction, and all the sliding bases are connected with the first sliding rails in a sliding manner.

According to some embodiments of the invention, in order to realize the sliding connection between the whirling devices and the sliding seats, all the sliding seats are provided with second sliding rails arranged along the left-right direction, and each whirling device is slidably connected to the corresponding second sliding rail.

According to some embodiments of the present invention, for convenience of description, the whirling assembly with the outer whirling cutter may be referred to as a rough whirling assembly, and the whirling assembly with the inner whirling cutter may be referred to as a finish whirling assembly, and the number of the rough whirling assemblies is two or more because a rough machining and a semi-finish machining of the rotor blank require a large cutting amount, and the number of the finish whirling assemblies is not more than the number of the rough whirling assemblies because a finish machining of the rotor blank requires a relatively small cutting amount.

According to some embodiments of the invention, in order to follow the principle of rough-then-finish machining, the direction from the finishing cyclone assembly to the rough-machining cyclone assembly is the machining direction of the rotor blank, so that any part of the rotor blank can be passed from rough machining to finish machining.

According to some embodiments of the invention, in order to realize an internal whirling process during finishing, the whirling device of the finishing whirling assembly is provided with a through hole for the rotor blank to pass through, and all cutting points of the internal whirling cutter are positioned in the through hole.

According to some embodiments of the invention, the side-to-side movement mechanism of the roughing cyclone cutting assembly is electrically driven since the cyclone milling apparatus for roughing requires dynamic adjustment of its side-to-side position during machining, while the side-to-side movement mechanism of the finishing cyclone cutting assembly can be electrically driven or manually controlled since the cyclone milling apparatus for finishing requires no dynamic adjustment of its side-to-side position during machining.

According to some embodiments of the present invention, since the screw block moving mechanism, the rack and pinion moving mechanism, the cylinder and the linear motor can all perform linear movement, the front-back moving mechanism and the left-right moving mechanism include the screw block moving mechanism, the rack and pinion moving mechanism, the cylinder or the linear motor.

According to the invention, the rotor of the second aspect embodiment is processed and formed through the multi-cyclone rotor forming equipment.

The rotor according to the embodiment of the invention has at least the following advantages: compared with the existing solid rotor, the rotor processed by the multi-cyclone rotor forming equipment has more advantages in the aspects of production efficiency and production cost.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic perspective view of a multi-cyclone rotor forming apparatus according to an embodiment of the present invention;

FIG. 2 is a front view of the multi-cyclone rotor forming apparatus shown in FIG. 1;

FIG. 3 is a top view of the multi-cyclone rotor forming apparatus shown in FIG. 1;

fig. 4 is a schematic view of a rotor blank according to an embodiment of the invention during machining.

In the drawings: 100-machine tool, 200-rotor blank, 110-machine head, 120-tailstock, 111-chuck, 121-thimble, 130-first slide rail, 310-slide seat, 320-whirlwind milling device, 330-left and right moving mechanism, 311-second slide rail, 321-rotating frame, 322-supporting frame, 323-through hole, 324-outer whirlwind milling cutter, 325-inner whirlwind milling cutter, 301-rough machining whirlwind cutting assembly, 302-finish machining whirlwind cutting assembly and 331-rotating handle.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as up, down, front, rear, left, right, etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and greater than, less than, more than, etc. are understood as excluding the number, and greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise specifically limited, terms such as set, installed, connected, etc. should be understood broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.

As shown in fig. 1 to 3, the multi-cyclone rotor forming apparatus according to the first embodiment of the present invention includes a machine tool 100 and at least two cyclone cutting assemblies, wherein the length of the machine tool 100 is greater than the length of a rotor blank 200, a front end and a rear end of the machine tool 100 are respectively provided with a machine head 110 and a tailstock 120, the machine head 110 is internally provided with a controller (not shown in the drawings) and a first rotary driving device (not shown in the drawings), the first rotary driving device is selected as a servo motor, the first rotary driving device rotationally drives a chuck 111 for clamping the rotor blank 200, the chuck 111 is selected as a three-claw chuck, the tailstock 120 is provided with a thimble 121, the thimble 121 faces the chuck 111, and the rotor blank 200 is provided with a positioning hole on its rotation axis for supporting the thimble 121, so that the first rotary driving device can drive the rotor blank 200 to rotate.

Further, in order to adapt to rotor blanks 200 with different lengths, the machine tool 100 is provided with a first slide rail 130 along the front-back direction, and the tailstock 120 is slidably connected to the first slide rail 130 and can be temporarily fixed on the machine tool 100 through a positioning pin (not shown in the figure), so that the length between the machine head 110 and the tailstock 120 can be adaptively adjusted according to the length of the rotor blank 200.

In addition, each whirling assembly comprises a sliding seat 310, a whirling device 320, a front-back moving mechanism (not shown in the figure) and a left-right moving mechanism 330, wherein the sliding seat 310 is slidably connected to the first slide rail 130 of the machine tool 100, any two adjacent sliding seats 310 are arranged at a front-back interval, and the front-back moving mechanism is used for limiting the relative position between the sliding seat 310 and the machine tool 100 so as to adjust the front-back position of the sliding seat 310. Meanwhile, the slide seat 310 is provided with a second slide rail 311 along the left-right direction, the cyclone milling device 320 is slidably connected to the second slide rail 311, and the left-right moving mechanism 330 is used for limiting the relative position between the cyclone milling device 320 and the slide seat 310, so as to adjust the left-right position of the cyclone milling device 320. The front-back moving mechanism and the left-right moving mechanism 330 include, but are not limited to, an air cylinder, a linear motor, a screw slider moving mechanism, or a rack-and-pinion moving mechanism, and in this embodiment, both the front-back moving mechanism and the left-right moving mechanism 330 may be selected as the screw slider moving mechanism. It should be noted that the front-back movement and the left-right movement of each of the whirling devices 320 are independently controlled and do not interfere with each other.

Specifically, the cyclone milling device 320 includes a second rotary driving device (not shown in the drawings), a rotary frame 321 and a support frame 322, the rotary frame 321 is rotatably connected to the support frame 322 through a bearing (not shown in the drawings), the support frame 322 is slidably connected to the second slide rail 311 of the sliding seat 310, and the second rotary driving device is selected from a motor, and is used for rotatably driving the rotary frame 321, when the rotation axis of the rotary frame 321 is arranged in the front-back direction, and is horizontally aligned with the rotation axis of the rotor blank 200. The rotating frame 321 is hollow and provided with a through hole 323 through which the rotor blank 200 can pass, a plurality of mounting grooves are uniformly distributed in the circumferential direction of the rotating frame 321, at least one of the mounting grooves of the rotating frame 321 is internally provided with an outer cyclone milling cutter 324 facing radially outwards, the cutting points of all the outer cyclone milling cutters 324 are positioned outside the through hole 323, at least one of the mounting grooves of the rotating frame 321 is internally provided with an inner cyclone milling cutter 325 facing radially inwards, and the cutting points of all the inner cyclone milling cutters 325 are positioned inside the through hole 323.

For convenience of description, the whirling assembly with the outer whirling cutter 324 may be referred to as a rough whirling assembly 301, and the whirling assembly with the inner whirling cutter 325 may be referred to as a finish whirling assembly 302. As shown in fig. 4, since the rough machining and the semi-finishing of the rotor blank 200 require a large cutting amount, the rough machining cyclone cutting assembly 301 may perform a single-point cutting of the rotor blank 200 by using a plurality of outer cyclone milling cutters 324, in which case the rough machining cyclone cutting assembly 301 is located at the left or right side of the rotor blank 200 to distribute the cutting amount to the plurality of outer cyclone milling cutters 324, thereby extending the service life of each outer cyclone milling cutter 324 and increasing the cutting efficiency of the rotor blank 200. Because the finishing of the rotor blank 200 requires a smaller cutting amount, the finishing whirling assembly 302 can perform multi-point cutting on the rotor blank 200 by using a plurality of internal whirling cutters 325, and at this time, the finishing whirling assembly 302 is sleeved outside the rotor blank 200 to increase the cutting frequency of the rotor blank 200, thereby effectively reducing the surface roughness of the rotor blank 200.

In the present invention, the number of the rough machining cyclone assemblies 301 is two, which correspond to the rough machining process and the semi-finishing process, respectively, and the number of the finishing cyclone assemblies 302 is one, which corresponds to the finishing process. However, in other embodiments, the number of the rough whirling assemblies 301 may be one, three, four, etc., and the number of the finishing whirling assemblies 302 may also be one or more, and the number of the finishing whirling assemblies 302 is not limited in the present invention, but in general, the number of the finishing whirling assemblies 302 is not more than the number of the rough whirling assemblies 301.

In order to comply with the rough-then-finish machining principle, if the machining direction of the rotor blank 200 is from back to front, all finishing cyclone cutting assemblies 302 are located behind all rough machining cyclone cutting assemblies 301, so that the rotor blank 200 can be roughly machined by the rough machining cyclone cutting assemblies 301 first and then be finish machined by the finishing cyclone cutting assemblies 302. Moreover, the machine tool 100 needs to reserve a sufficient clearance for the whirling assemblies, so that when the first rough whirling assembly 301 processes the rotor blank 200 or when the last finish whirling assembly 302 processes the rotor blank 200, the positions of the other whirling assemblies can be reasonably planned to avoid interference.

For a progressive cavity pump, the more leads there are, the higher the output pressure, the number of leads being equal to the total helical length of the rotor/pitch of the rotor, so that each rotor has at least one lead and there is a fixed eccentricity e between the centre line of the rotor and its axis of rotation, which enables the rotor to perform a planetary motion within the stator. According to the rotor whirling process, every time the rotor blank 200 rotates for one circle under the driving of the first rotary driving device, the whirling assembly needs to advance for a pitch distance at a constant speed within the time of one circle of rotation of the rotor blank 200 so as to process the pitch meeting the technical requirements. Since the finishing time period of the rotor blank 200 coincides with the rough machining time period thereof, the present invention creates a way to increase the cutting frequency by performing multi-point cutting of the rotor blank 200 using the plurality of internal whirling cutters 325, thereby significantly reducing the surface roughness of the rotor blank 200 within a limited time.

It should be noted that, because the whirling process of the rotor requires a lot of cutting, the rotation speed of the rotor blank 200 is very slow, generally not higher than 1/30rpm, and taking 1/30rpm as an example, it takes 30 minutes for the rotor to rotate for one circle, during which the whirling assembly advances by a pitch distance along the machining direction of the rotor at a uniform speed. In order to accurately control the amount of forward and backward displacement of the whirling assembly, the forward and backward movement mechanism of the whirling assembly is preferably driven by a servo motor.

As shown in fig. 4, since the outer wind mill 324 of the roughing cyclone cutting assembly 301 cuts along one side of the rotor blank 200, and the roughing cyclone cutting assembly 301 advances at a constant speed with the rotation of the rotor blank 200, the distance between the rotation axis of the rotating frame 321 and the center line of the rotor blank 200 changes orthogonally with the processing progress of the rotor blank 200, in order to ensure that the cutting point of the outer wind mill 324 can be always located on the eccentric arc of the rotor, the cyclone milling device 320 of the roughing cyclone cutting assembly 301 needs to dynamically adjust the left and right positions according to the processing progress of the rotor blank 200, the displacement of the movement is circulated in the time of one rotation of the rotor blank 200 with the pitch and the eccentricity of the rotor as parameters, and the operator can perform parametric control on the controller by inputting the preset pitch and the eccentricity. In order to accurately control the amount of lateral displacement of the milling unit 320 of the roughing cyclone assembly 301, the lateral movement mechanism 330 of the roughing cyclone assembly 301 is preferably driven by a servo motor.

In addition, since the inner wind mill 325 of the finishing cyclone cutting assembly 302 cuts along the circumferential surface of the rotor blank 200, and the finishing cyclone cutting assembly 302 advances at a constant speed with the rotation of the rotor blank 200, when the distance between the rotation axis of the rotating frame 321 and the rotation axis of the rotor blank 200 is equal to the eccentricity of the rotor, the chip point of the inner wind mill 325 is always located on the eccentric arc of the rotor. It will be appreciated that once the whirling device 320 of the finishing whirling assembly 302 has adjusted its left-right position according to the eccentricity of the rotor, its left-right position does not need to be adjusted again during the machining of the rotor blank 200. To this end, the side-to-side movement mechanism 330 of the finishing cyclone assembly 302 may be manually or electrically controlled, in this embodiment by a graduated rotating handle 331, to save manufacturing costs.

In some embodiments of the present invention, in order to ensure the machining accuracy of each of the cyclone milling devices 320, the cutting points of the plurality of outer cyclone mills 324 are located on the same circumference with the rotation axis of the corresponding rotating frame 321 as the central axis, and the cutting points of the plurality of inner cyclone mills 325 are located on the same circumference with the rotation axis of the corresponding rotating frame 321 as the central axis, that is, in the same rough machining cyclone cutting assembly 301, the cutting amount of all the outer cyclone mills 324 is the same, and in the same finishing cyclone cutting assembly 302, the cutting amount of all the inner cyclone mills 325 is the same.

The rotor of the second aspect embodiment of the present invention, which is formed by the multi-cyclone rotor forming device of the first aspect embodiment of the present invention, is more advantageous in terms of production efficiency and production cost than the existing solid rotor.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. Multi-cyclone rotor forming apparatus, comprising:

the machine tool (100) is sequentially provided with a machine head (110) and a tailstock (120) along the front-back direction, the machine head (110) is provided with a rotatable chuck (111), and the tailstock (120) is provided with an ejector pin (121);

the cyclone cutting assembly comprises two or more than two sliding seats (310), a front-back moving mechanism, cyclone milling devices (320) and a left-right moving mechanism (330), wherein the sliding seats (310) are connected to the machine tool (100) in a sliding mode along the front-back direction, any two adjacent sliding seats (310) are arranged at a front-back interval, the relative position between the sliding seats (310) and the machine tool (100) is limited by the front-back moving mechanism, the cyclone milling devices (320) are connected to the sliding seats (310) in a sliding mode along the left-right direction, the relative position between the cyclone milling devices (320) and the sliding seats (310) is limited by the left-right moving mechanism (330), at least one cyclone milling device (320) is rotationally driven to be provided with a plurality of outward radial cyclone milling cutters (324), and at least one cyclone milling device (320) is rotationally driven to be provided with a plurality of inward radial cyclone milling cutters (325).

2. The multi-cyclone rotor forming apparatus as claimed in claim 1, wherein: all the cyclone milling devices (320) are provided with rotating axes arranged along the front-back direction, the cutting points of the outer cyclone milling cutters (324) are all positioned on the same circumference taking the corresponding rotating axes as central axes, and the cutting points of the inner cyclone milling cutters (325) are all positioned on the same circumference taking the corresponding rotating axes as central axes.

3. The multi-cyclone rotor forming apparatus as claimed in claim 1, wherein: the machine tool (100) is provided with a first sliding rail (130) arranged along the front-back direction, and all sliding seats (310) are connected to the first sliding rail (130) in a sliding mode.

4. The multi-cyclone rotor forming apparatus as claimed in claim 3, wherein: all the sliding seats (310) are provided with second sliding rails (311) arranged along the left-right direction, and each cyclone milling device (320) is connected to the corresponding second sliding rail (311) in a sliding mode.

5. The multi-cyclone rotor forming apparatus as claimed in claim 1, 3 or 4, wherein: the cyclone cutting assembly with the external cyclone milling cutter (324) is called a rough machining cyclone cutting assembly (301), the cyclone cutting assembly with the internal cyclone milling cutter (325) is called a finish machining cyclone cutting assembly (302), the number of the rough machining cyclone cutting assemblies (301) is two or more, and the number of the finish machining cyclone cutting assemblies (302) is not more than that of the rough machining cyclone cutting assemblies (301).

6. The multi-cyclone rotor forming apparatus as claimed in claim 5, wherein: the direction from the finish machining cyclone cutting assembly (302) to the rough machining cyclone cutting assembly (301) is the machining direction of the rotor blank (200).

7. The multi-cyclone rotor forming apparatus as claimed in claim 5, wherein: the cyclone milling device (320) of the finish machining cyclone cutting assembly (302) is provided with a through hole (323) through which the rotor blank (200) can pass, and cutting points of all the internal cyclone milling cutters (325) are positioned in the through hole (323).

8. The multi-cyclone rotor forming apparatus as claimed in claim 5, wherein: the left-right moving mechanism (330) of the rough machining cyclone cutting assembly (301) is controlled electrically, and the left-right moving mechanism (330) of the finish machining cyclone cutting assembly (302) is controlled electrically or manually.

9. The multi-cyclone rotor forming apparatus as claimed in claim 1, wherein: the front-back moving mechanism and the left-right moving mechanism (330) comprise a screw rod sliding block moving mechanism, a gear rack moving mechanism, an air cylinder or a linear motor.

10. A rotor, characterized in that the rotor is formed by a multi-cyclone rotor forming apparatus as claimed in any one of claims 1 to 9.