Split pump machining method

Abstract

The application relates to a center-opening pump machining method, which comprises the following steps: S1, casting a pump cover, the pump cover being provided with a semicircular hole matched with the hole diameter of an impeller sealing ring groove; S2, machining a mounting surface of the pump cover into a plane; S3, machining a bolt hole on the plane; S4, connecting the pump cover with an upper pump body, machining the impeller sealing ring groove on the upper pump body to meet the size requirement; S5, dismounting the pump cover; S6, machining a part of the plane of the pump cover to form a new plane; S7, connecting the pump cover in the step S6 with a lower pump body, machining the impeller sealing ring groove on the lower pump body to meet the size requirement; and dismounting the pump cover. The upper pump body and the lower pump body of the center-opening pump are independently machined in the application, the pump cover is simple in structure, the semicircular hole of the pump cover is very easy for a boring cutter to enter, normal hole machining is met, the size is conveniently measured in the machining process, and the machining problem of the center-opening pump with a small mouth and a large belly is solved.

Description

Technical Field

[0001] This invention relates to the field of pump housing processing technology, and specifically to a method for processing a split-case pump. Background Technology

[0002] like Figure 1 and 2 The diagram shows a novel split-case pump body structure. Figure 1 It is the lower pump body. Figure 2 It's the upper pump body. This type of pump body has a special structural design; the bearing bore diameter on both sides is 90mm, while the impeller seal ring groove diameter is 2700mm. +0.025 The pump body has a small opening and a large interior, requiring extremely high precision in machining the sealing ring groove. For conventional split-case pumps where the inner and outer diameters are similar, boring is typically performed directly after assembling the upper and lower pump bodies, allowing the boring tool to enter the inner bore eccentrically along the bore wall. However, this type of split-case pump has a 180mm difference between its inner and outer diameters, and the outer opening diameter is only 90mm, making conventional machining impossible. Therefore, a new machining method needs to be designed for this unique pump body structure. Summary of the Invention

[0003] The purpose of this invention is to provide a method for machining a split-case pump, which solves the machining problem of pump bodies with a large difference between their inner and outer diameters, as mentioned above.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] S1: Pre-cast a pump cover with a semi-circular hole that matches the diameter of the impeller seal ring groove. S2: Machine a flat surface onto the mounting surface of the pump cover;

[0006] S3: Bolt holes are machined on the plane for connection with the upper pump body;

[0007] S4: Connect the pump cover from step S3 to the upper pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the upper pump body until the dimensions meet the design requirements.

[0008] S5: Remove the pump cover;

[0009] S6: A portion of the plane of the pump cover is machined to form a new plane;

[0010] S7: Connect the pump cover from step S6 to the lower pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the lower pump body until the dimensions meet the design requirements.

[0011] S8: Remove the pump cover.

[0012] Another embodiment of a split-case pump manufacturing method includes the following steps: S1: pre-casting a pump cover having a semi-circular hole that matches the diameter of the impeller sealing ring groove;

[0013] S2: Machin a flat surface on the mounting surface of the pump cover;

[0014] S3: Bolt holes are machined on the plane for connection with the lower pump body;

[0015] S4: Connect the pump cover from step S3 to the lower pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the lower pump body until the dimensions meet the design requirements.

[0016] S5: Remove the pump cover;

[0017] S6: A portion of the plane of the pump cover is machined to form a new plane;

[0018] S7: Connect the pump cover from step S6 to the upper pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the upper pump body until the dimensions meet the design requirements.

[0019] S8: Remove the pump cover.

[0020] Furthermore, in steps S4 and S7, the impeller sealing ring grooves on both sides are machined sequentially.

[0021] Furthermore, in steps S2 and S6, a milling process is used.

[0022] Furthermore, in step S3, the plane of the pump cover mates with the flange end face of the upper pump body.

[0023] Furthermore, the pump cover includes an arc-shaped plate with an end plate at each end. The inner surface of the end plate is machined into the plane. The bolt holes penetrate the end plates vertically. The middle of the arc-shaped plate has a through hole in the vertical direction.

[0024] The beneficial effects of this invention are:

[0025] The processing method of this invention adopts a separate and independent processing approach for the upper and lower pump bodies of the split-case pump. When processing one of the pump bodies, a cast pump cover is used as the other half of the split-case pump. Due to the simple structure of the pump cover, the semi-circular hole of the pump cover is very easy for a boring tool to enter, which not only meets the requirements for normal hole processing, but also facilitates the measurement of dimensions during the processing, thereby solving the problem that the split-case pump has a small opening and a large belly, making it inconvenient to process. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the lower pump body during the pumping process;

[0027] Figure 2This is a structural diagram of the upper pump body during the pumping process;

[0028] Figure 3 yes Figure 1 A partial structural view within;

[0029] Figure 4 This is a 3D view of the pump cover (unprocessed);

[0030] Figure 5 This is a three-dimensional view of the pump cover from another angle;

[0031] Figure 6 This is a 3D view of the pump cover after the bolt holes have been machined;

[0032] Figure 7 This is a flowchart of the split-case pump manufacturing process.

[0033] 1. Lower pump body; 2. Impeller seal ring groove; 3. Bearing hole; 4. Upper pump body; 5. Pump cover; 51. Arc plate; 52. Through hole; 53. End plate; 54. Bolt hole; 55. Semicircular hole; 56. Flat surface. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0035] Embodiment 1 of the present invention:

[0036] like Figures 1-5 As shown, a method for manufacturing a split-case pump includes the following steps:

[0037] A method for manufacturing a split-case pump includes the following steps:

[0038] The lower pump body 1 and upper pump body 4 to be processed, such as Figure 1 and 2 As shown, this embodiment involves machining the impeller sealing ring groove 2, with the following design dimensions:

[0039] S1: Pre-cast a pump cover 5, such as Figure 4As shown, the pump cover 5 has a semi-circular hole 55 that matches the diameter of the impeller sealing ring groove 2, and the two fit together to form a complete circular hole. The pump cover 5 is used as the pump body during processing, and its structure does not need to be as complex as that of a pump body; it only needs to meet the requirement of processing a complete circular hole. The pump cover 5 includes an arc-shaped plate 51, with the semi-circular hole 55 formed on the inner side of the arc-shaped plate 51. An end plate 53 is provided at each end of the arc-shaped plate 51. A through hole 52 in the vertical direction is provided in the middle of the arc-shaped plate 51, further simplifying the structure and facilitating dimensional measurement during subsequent processing. After setting this through hole 52, the arc-shaped plate 51 has two C-shaped plates, each with the semi-circular hole 55.

[0040] S2: Machine a flat surface 56 onto the mounting surface of the pump cover 5, such as... Figure 5 As shown, the inner side of the end plate 53 is machined to form the plane 56. Since the pump cover 5 is a casting, it needs to be further machined to ensure its flatness 56 for use as an installation plane. The process of milling the plane 56 can be adopted.

[0041] S3: As Figure 6 As shown, bolt holes 54 are machined on the plane 56 for connection with the upper pump body 4; the bolt holes 54 are through the upper and lower end plates 53, and two bolt holes 54 are machined on each end plate 53.

[0042] S4: Connect the pump cover 5 from step S3 to the upper pump body 4 with bolts. The flat surface 56 machined on one side of the pump cover 5 mates with the flange end face of the upper pump body 4. After the surface mates with the corresponding bolt holes 54 on the flange end face, the bolts are connected. Then, use a boring tool to machine the impeller sealing ring groove 2 on the upper pump body 4 until the dimensions meet the design requirements; the diameter of the impeller sealing ring meets the design dimensions. At this time, the semi-circular hole 55 of the pump cover 5 is also machined to conform to the design dimensions.

[0043] S5: Remove pump cover 5.

[0044] S6: A portion of the plane 56 on the pump cover 5 is machined away to form a new plane. This can be done by milling. The reason for machining a new plane is to reduce the diameter of the semi-circular hole 55 on the pump cover 5 after boring, so that there is still machining allowance after subsequent connection with the lower pump body 1. The thickness removed in this step can be around 5mm, and there is no strict requirement.

[0045] S7: Connect the pump cover 5 from step S6 to the lower pump body 1 using bolts. The new flat surface 56 of the pump cover 5 mates with the flange end face of the upper pump body 4. After connection, use a boring tool to machine the impeller seal ring groove 2 at the lower pump body 1 until the dimensions meet the design requirements. The diameter of the impeller seal ring at the lower pump body 1 meets the design dimensions. At this time, the semi-circular hole 55 newly formed in step S6 of the pump cover 5 is also processed to conform to the design size;

[0046] S8: Remove pump cover 5.

[0047] In steps S4 and S7, the impeller sealing ring grooves 2 on both sides are machined sequentially.

[0048] After removing the pump cover 5 in step S8, the machined upper pump body 4 and lower pump body 1 are assembled together using tapered pins and bolts, and the split pump machining is completed.

[0049] Using the method of this invention, the upper pump body 4 and the lower pump body 1 of the split-case pump are machined separately. When machining one of them, the cast pump cover 5 is used as the other half of the split-case pump. Because the pump cover 5 has a simple structure, the semi-circular hole 55 of the pump cover 5 makes it very easy for a boring tool to enter. The machining process also facilitates dimensional measurement, solving the problem that the split-case pump has a small opening and a large belly, making it inconvenient to machine.

[0050] In the above embodiments, the upper pump body is processed first, but the lower pump body can also be processed first; the only difference is the order, all other steps are the same. See Embodiment 2 for each step.

[0051] Embodiment 2 of the present invention:

[0052] like Figures 1-5 As shown, a method for processing a split-case pump includes the following steps: S1: Pre-cast a pump cover 5, the pump cover 5 having a semi-circular hole 55 that matches the diameter of the impeller sealing ring groove;

[0053] S2: Machin a flat surface on the mounting surface of the pump cover 5;

[0054] S3: Bolt holes 54 are machined on the plane for connection with the lower pump body 1;

[0055] S4: Connect the pump cover from step S3 to the lower pump body 1 with bolts. After connection, use a boring tool to machine the impeller sealing ring groove 2 on the lower pump body until the dimensions meet the design requirements.

[0056] S5: Remove pump cover 5;

[0057] S6: A portion of the plane of the pump cover 5 is machined to form a new plane;

[0058] S7: Connect the pump cover 5 from step S6 to the upper pump body 4 with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the upper pump body until the size meets the design requirements.

[0059] S8: Remove pump cover 5.

[0060] After removing the pump cover 5, the machined upper pump body 4 and lower pump body 1 are assembled together using tapered pins and bolts, and the split pump machining is completed.

Claims

1. A method for processing a split-case pump, characterized in that: The process includes the following steps: S1: Pre-casting a pump cover, the pump cover having a semi-circular hole that matches the diameter of the impeller seal ring groove; S2: Machin a flat surface on the mounting surface of the pump cover; S3: Bolt holes are machined on the plane for connection with the upper pump body; the pump cover includes an arc-shaped plate, with an end plate at each end of the arc-shaped plate, the inner side of the end plate is machined into the plane, the bolt holes penetrate the end plate vertically, and the middle of the arc-shaped plate has a through hole in the vertical direction. S4: Connect the pump cover from step S3 to the upper pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the upper pump body until the dimensions meet the design requirements. S5: Remove the pump cover; S6: A portion of the plane of the pump cover is machined to form a new plane; S7: Connect the pump cover from step S6 to the lower pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the lower pump body until the dimensions meet the design requirements. S8: Remove the pump cover.

2. The method for processing a split-case pump according to claim 1, characterized in that: In steps S4 and S7, the impeller sealing ring grooves on both sides are machined sequentially.

3. The method for processing a split-case pump according to claim 1, characterized in that: In steps S2 and S6, a milling process is used to mill a plane.

4. The method for processing a split-case pump according to claim 1, characterized in that: In step S3, the plane of the pump cover mates with the flange end face of the upper pump body.

5. A method for processing a split-case pump, characterized in that: The process includes the following steps: S1: Pre-casting a pump cover, the pump cover having a semi-circular hole that matches the diameter of the impeller seal ring groove; S2: Machin a flat surface on the mounting surface of the pump cover; S3: Bolt holes are machined on the plane for connection with the lower pump body; the pump cover includes an arc-shaped plate, with an end plate at each end of the arc-shaped plate, the inner side of the end plate is machined into the plane, the bolt holes penetrate the end plate vertically, and the middle of the arc-shaped plate has a through hole in the vertical direction. S4: Connect the pump cover from step S3 to the lower pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the lower pump body until the dimensions meet the design requirements. S5: Remove the pump cover; S6: A portion of the plane of the pump cover is machined to form a new plane; S7: Connect the pump cover from step S6 to the upper pump body with bolts. After connection, use a boring tool to machine the impeller sealing ring groove on the upper pump body until the dimensions meet the design requirements. S8: Remove the pump cover.

6. The method for processing a split-case pump according to claim 5, characterized in that: In steps S4 and S7, the impeller sealing ring grooves on both sides are machined sequentially.

7. The method for processing a split-case pump according to claim 5, characterized in that: In steps S2 and S6, a milling process is used to mill a plane.

8. The method for processing a split-case pump according to claim 5, characterized in that: In step S3, the plane of the pump cover mates with the flange end face of the upper pump body.

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