Centrifugal pump volute end face chamfering device

Abstract

The utility model discloses a centrifugal pump volute end face chamfering device which comprises a fixed bottom plate, a lower supporting block is fixed in the middle of the top face of the fixed bottom plate, the bottom face of a bottom plate of a volute to be machined abuts against the top face of the lower supporting block in a pressing mode, an upper pressing plate is fixed above the lower supporting block, and the upper pressing plate abuts against the top face of the middle of the bottom plate of the volute in a pressing mode. Vertical supporting plates are fixed to the top faces of the portions, on the left side and the right side of the volute, of the fixed bottom plate, vertical lifting mechanisms are fixed to the upper portions of the vertical supporting plates, a middle lifting plate is fixed to lifting blocks of the two vertical lifting mechanisms, and the middle of the top face of the middle lifting plate is movably connected with a main shaft through a bearing. The volute machining device is suitable for machining large batches of volutes of the same specification, can automatically polish the tops of the outer side and the inner side of an annular connecting protruding part at the top of the volute, and is high in polishing efficiency, good in effect and high in machining precision.

Description

Technical fields:

[0001] This utility model relates to the field of water pump processing equipment technology, and more specifically to a chamfering device for the end face of a centrifugal pump volute. Background technology:

[0002] In existing large centrifugal pumps, the upper part of the volute is formed with a large-diameter annular protrusion as a connecting end face. After the end face is processed, both the outer and inner sides need to be chamfered. After the chamfering is completed, grinding is required to remove burrs.

[0003] The existing processing involves manual grinding, which is inefficient due to the large diameter of the annular protrusion. It is also difficult to control the grinding precision and is cumbersome to operate.

[0004] Since the processing of volute casings is generally done in batches, there are a large number of products of the same specifications that need to be processed, which requires a lot of manual labor. Utility Model Content:

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a centrifugal pump volute end face chamfering device. It is suitable for processing large batches of volutes of the same specification. It can automatically grind the top of the outer side and the top of the inner side of the annular connecting protrusion at the top of the volute. It has high grinding efficiency, good effect and high processing accuracy.

[0006] The solution of this utility model to the aforementioned technical problem is:

[0007] A chamfering device for the end face of a centrifugal pump volute includes a fixed base plate, a lower support block fixed in the middle of the top surface of the fixed base plate, the bottom surface of the bottom plate of the volute to be processed pressing against the top surface of the lower support block, and an upper pressure plate fixed above the lower support block, the upper pressure plate pressing against the top surface of the middle part of the bottom plate of the volute.

[0008] Vertical support plates are fixed to the top surfaces of the fixed base plates on the left and right sides of the volute. A vertical lifting mechanism is fixed to the upper part of the vertical support plates. The middle lifting plate is fixed to the lifting blocks of the two vertical lifting mechanisms. A main shaft is movably connected to the middle of the top surface of the middle lifting plate through a bearing. A horizontal rotating plate is fixed to the bottom end of the main shaft. An external gear ring is fixed to the upper outer wall of the main shaft. A rotary drive motor is fixed to the top surface of the edge of the middle lifting plate. The bottom end of the output shaft of the rotary drive motor extends out of the bottom surface of the middle lifting plate and is fixed with a drive gear. The drive gear meshes with the external gear ring.

[0009] An adjustment plate is installed on the bottom edge of the horizontal rotating plate. Two grinding motors are fixed on the bottom surface of the adjustment plate. Grinding wheels are fixed at the bottom ends of the output shafts of the two grinding motors. The side walls of the grinding wheels are conical, corresponding to the outer and inner sides of the top surface of the annular connecting protrusion at the top of the volute.

[0010] The lower support block has a groove formed in the middle of its top surface. The lower annular protrusion formed in the middle of the bottom surface of the bottom plate of the volute is inserted into the groove and cooperates with it. The bottom surface of the lower annular protrusion presses against the bottom surface of the groove.

[0011] Multiple positioning pins are fixed on the bottom surface of the lower groove. The positioning pins are inserted into the corresponding positioning through holes on the lower annular protrusion, and their outer sidewalls are in close contact with the inner sidewalls of the corresponding positioning through holes.

[0012] The vertical lifting mechanism includes connecting plates fixed to the bottom and middle inner sidewalls of the vertical support plate. The two ends of the vertical screw are movably connected to the two connecting plates through bearings. A lifting servo motor is fixed on one of the connecting plates. The lifting servo motor drives the vertical screw to rotate. The lifting block is screwed onto the vertical screw.

[0013] A vertical guide rail is fixed on the inner wall of the portion of the vertical support plate between the two connecting plates, and a slider is fixed on one side wall of the lifting block. The vertical guide rail is inserted into the groove of the corresponding slider and cooperates with the groove.

[0014] The outstanding effect of this utility model is:

[0015] Compared with existing technologies, it is suitable for mass production of volutes of the same specifications. It can automatically grind the top of the outer and inner sides of the annular connecting protrusion at the top of the volute, with high grinding efficiency, good effect, and high processing precision. Attached image description:

[0016] Figure 1 This is a partial sectional view of the present invention;

[0017] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0018] Figure 3 This is a partial top view of the volute. Detailed implementation method:

[0019] For example, see below. Figures 1 to 3 As shown, a centrifugal pump volute end face chamfering device includes a fixed base plate 10, a lower support block 20 fixed in the middle of the top surface of the fixed base plate 10, the bottom surface of the bottom plate of the volute 100 to be processed is pressed against the top surface of the lower support block 20, and an upper pressure plate 30 is fixed above the lower support block 20, the upper pressure plate 30 is pressed against the middle top surface of the bottom plate of the volute 100;

[0020] Vertical support plates 11 are fixed to the top surfaces of the fixed base plates 10 on both sides of the volute 100. Vertical lifting mechanisms 40 are fixed to the upper part of the vertical support plates 11. The middle lifting plate 50 is fixed to the lifting blocks 41 of the two vertical lifting mechanisms 40. The middle part of the top surface of the middle lifting plate 50 is movably connected to the main shaft 51 through the bearing. The bottom end of the main shaft 51 is fixed to the horizontal rotating plate 52. The upper outer side wall of the main shaft 51 is fixed to the external gear ring 53. The top surface of the side of the middle lifting plate 50 is fixed to the rotary drive motor 54. The bottom end of the output shaft of the rotary drive motor 54 extends out of the bottom surface of the middle lifting plate 50 and is fixed to the drive gear 55. The drive gear 55 meshes with the external gear ring 53.

[0021] An adjustment plate 56 is installed on the bottom side of the horizontal rotating plate 52. Two grinding motors 57 are fixed on the bottom surface of the adjustment plate 56. Grinding wheels 58 are fixed at the bottom end of the output shafts of the two grinding motors 57. The two grinding wheels 58 have the same structure and their horizontal positions are symmetrical about the central vertical plane between the two grinding wheels 58. The side wall of the grinding wheel 58 is a conical wall, which corresponds to the outer and inner sides of the top surface of the annular connecting protrusion 101 at the top of the volute 100.

[0022] Furthermore, the lower support block 20 has a lower groove formed in the middle of its top surface, and the lower annular protrusion formed in the middle of the bottom surface of the bottom plate of the volute 100 is inserted into the lower groove and cooperates with the lower groove, with the bottom surface of the lower annular protrusion pressing against the bottom surface of the lower groove.

[0023] Multiple positioning posts 21 are fixed on the bottom surface of the lower groove. The positioning posts 21 are inserted into the corresponding positioning through holes on the lower annular protrusion, and their outer side walls are in close contact with the inner side walls of the corresponding positioning through holes. The positioning posts 21 prevent the volute 100 from rotating when it is installed on the lower support block 20, thus improving the fixing effect.

[0024] Furthermore, the upper pressure plate 30 has a vertical through hole in the middle, the screw part of the fixing bolt 31 is inserted into the vertical through hole, and its bottom end extends out of the middle through hole of the bottom plate of the volute 100 and is screwed into the screw hole in the middle of the bottom surface of the lower groove. The top surface of the rotating part of the fixing bolt 31 presses against the top surface of the upper pressure plate 30.

[0025] The vertical lifting mechanism 40 includes connecting plates fixed to the bottom and middle inner sidewalls of the vertical support plate 11. The two ends of the vertical screw 42 are movably connected to the two connecting plates through bearings. A lifting servo motor 43 is fixed on one of the connecting plates. The output shaft of the lifting servo motor 43 is a spline shaft, which is inserted into the spline hole at one end of the vertical screw 42 and drives the vertical screw 42 to rotate. The lifting block 41 is screwed onto the vertical screw 42.

[0026] A vertical guide rail 1 is fixed on the inner wall of the portion of the vertical support plate 11 located between the two connecting plates. A slider 44 is fixed on one side wall of the lifting block 41. The vertical guide rail 1 is inserted into the groove of the corresponding slider 44 and cooperates with the groove.

[0027] Furthermore, an accordion-style telescopic protective cover 2 is fixed between the bottom surface of the lifting block 41 and the side wall of the connecting plate below, and the lower part of the vertical screw 42 is located within the accordion-style telescopic protective cover 2. The accordion-style telescopic protective cover 2 can prevent grinding debris from splashing onto the vertical screw 42 during grinding, ensuring the normal operation of the vertical screw 42.

[0028] The front, left and right sides of the rear of the adjusting plate 56 are each formed with a waist-shaped through groove 561. The screw part of the connecting bolt 562 is inserted into the corresponding waist-shaped through groove 561, and its top end is screwed into the screw hole formed on the bottom side of the horizontal rotating plate 52. The adjusting plate 56 is clamped between the top surface of the rotating part of the corresponding connecting bolt 562 and the bottom surface of the horizontal rotating plate 52.

[0029] It can achieve simultaneous movement of the grinding wheels 58 of the two grinding motors 57 by loosening all the connecting bolts 562, then moving the adjusting plate 56 horizontally to fine-tune its position, and then tightening the connecting bolts 562.

[0030] This embodiment is suitable for processing a large batch of volute housings 100 of the same specification because the distance between the grinding wheels 58 of the two grinding motors 57 is constant and is adapted to the width of the annular connecting protrusion 101 of the volute housing 100 to be processed. Since the side wall of the grinding wheel 58 is a conical wall, when the width of the annular connecting protrusion 101 of the volute housing 100 to be processed is slightly too large or too small, it is only necessary to control the lowering position of the grinding wheel 58 to satisfy the chamfering of the upper part of the outer and inner sides of the annular connecting protrusion 101 of the volute housing 100 to be processed, which is very convenient.

[0031] When the specifications of the volute 100 being processed change, the corresponding adjustment plate 56 needs to be disassembled and the adjustment plate 56 with the corresponding two grinding motors 57 installed is installed to ensure that the distance between the grinding wheels 58 of the two grinding motors 57 matches the width of the annular connecting protrusion 101 of the volute 100 to be processed. At the same time, the lower support block 20 is disassembled and replaced with a lower support block 20 that matches the bottom structure of the volute 100 to be processed. This will not be described in detail here.

[0032] In this embodiment, during processing, the lower part of the volute 100 to be processed is installed into the corresponding lower support block 20, and the upper pressure plate 30 is manually installed so that the pressure plate 30 presses against the top surface of the middle part of the bottom plate of the volute 100. At the same time, the positioning pin 21 is inserted into the corresponding positioning through hole on the lower annular protrusion to position and fix the volute 100. Then, the two grinding motors 57 are operated to rotate the grinding wheel 58, and at the same time, the two lifting servo motors 43 are operated to lower the grinding wheel 58 to connect with the annular connecting protrusion of the volute 100. The outer and inner chamfers of the top of the 101 are contacted and polished to remove burrs. Then, the rotary drive motor 54 runs, causing the horizontal rotating plate 52 to rotate, so that the two polishing wheels 58 polish along the chamfers of the top of the annular connecting protrusion 101, achieving good processing results. Moreover, the lifting and lowering are all achieved by the operation of two lifting servo motors 43, thereby ensuring that the polishing depth and angle of the chamfers of the top of the annular connecting protrusion 101 are basically consistent, ensuring processing accuracy.

[0033] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A chamfering device for the end face of a centrifugal pump volute, comprising a fixed base plate (10), characterized in that: A lower support block (20) is fixed in the middle of the top surface of the fixed base plate (10). The bottom surface of the base plate of the volute (100) to be processed presses against the top surface of the lower support block (20). An upper pressure plate (30) is fixed above the lower support block (20). The upper pressure plate (30) presses against the top surface of the middle part of the base plate of the volute (100). Vertical support plates (11) are fixed on the top surface of the fixed base plates (10) on the left and right sides of the volute (100). Vertical lifting mechanisms (40) are fixed on the upper part of the vertical support plates (11). The middle lifting plate (50) is fixed on the lifting blocks (41) of the two vertical lifting mechanisms (40). The middle part of the top surface of the middle lifting plate (50) is movably connected to the main shaft (51) through the bearing. The bottom end of the main shaft (51) is fixed with a horizontal rotating plate (52). An external gear ring (53) is fixed on the upper outer side wall of the main shaft (51). A rotary drive motor (54) is fixed on the top surface of the side of the middle lifting plate (50). The bottom end of the output shaft of the rotary drive motor (54) extends out of the bottom surface of the middle lifting plate (50) and is fixed with a drive gear (55). The drive gear (55) meshes with the external gear ring (53). An adjustment plate (56) is installed on the bottom side of the horizontal rotating plate (52). Two grinding motors (57) are fixed on the bottom surface of the adjustment plate (56). Grinding wheels (58) are fixed at the bottom ends of the output shafts of the two grinding motors (57). The side wall of the grinding wheel (58) is a conical wall, which corresponds to the outer and inner sides of the top surface of the annular connecting protrusion (101) at the top of the volute (100).

2. A centrifugal pump volute end face chamfering device according to claim 1, characterized in that: The lower support block (20) has a groove formed in the middle of its top surface. The lower annular protrusion formed in the middle of the bottom surface of the bottom plate of the volute (100) is inserted into the groove and cooperates with it. The bottom surface of the lower annular protrusion presses against the bottom surface of the groove.

3. A centrifugal pump volute end face chamfering device according to claim 2, characterized in that: Multiple positioning posts (21) are fixed on the bottom surface of the lower groove. The positioning posts (21) are inserted into the corresponding positioning through holes on the lower annular protrusion, and their outer sidewalls are in close contact with the inner sidewalls of the corresponding positioning through holes.

4. A centrifugal pump volute end face chamfering device according to claim 2, characterized in that: The upper pressure plate (30) has a vertical through hole in the middle. The screw part of the fixing bolt (31) is inserted into the vertical through hole. Its bottom end extends out of the middle through hole of the bottom plate of the volute (100) and is screwed into the screw hole in the middle of the bottom surface of the lower groove. The top surface of the rotating part of the fixing bolt (31) presses against the top surface of the upper pressure plate (30).

5. A centrifugal pump volute end face chamfering device according to claim 1, characterized in that: The vertical lifting mechanism (40) includes connecting plates fixed to the bottom and middle inner sidewalls of the vertical support plate (11). The two ends of the vertical screw (42) are movably connected to the two connecting plates through bearings. A lifting servo motor (43) is fixed on one of the connecting plates. The lifting servo motor (43) drives the vertical screw (42) to rotate. The lifting block (41) is screwed onto the vertical screw (42).

6. A centrifugal pump volute end face chamfering device according to claim 5, characterized in that: The vertical support plate (11) has a vertical guide rail (1) fixed on the inner wall of the part between the two connecting plates, and a slider (44) is fixed on one side wall of the lifting block (41). The vertical guide rail (1) is inserted into the groove of the corresponding slider (44) and cooperates with the groove.

7. A centrifugal pump volute end face chamfering device according to claim 6, characterized in that: A bellows-type telescopic protective cover (2) is fixed between the bottom surface of the lifting block (41) and the side wall of the connecting plate below, and the lower part of the vertical screw (42) is located in the bellows-type telescopic protective cover (2).

8. A centrifugal pump volute end face chamfering device according to claim 1, characterized in that: The front and rear left and right parts of the adjusting plate (56) are all formed with waist-shaped through grooves (561). The screw part of the connecting bolt (562) is inserted into the corresponding waist-shaped through groove (561), and its top end is screwed into the screw hole formed on the bottom side of the horizontal rotating plate (52). The adjusting plate (56) is clamped between the top surface of the rotating part of the corresponding connecting bolt (562) and the bottom surface of the horizontal rotating plate (52).

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