Axially split pump machining method

Abstract

The axially split pump machining method comprises the following steps that S1, a pump cover is cast, and the pump cover is provided with a semicircular hole matched with the hole diameter of an impeller sealing ring groove; s2, machining a plane on the mounting surface of the pump cover; s3, bolt holes are machined in the plane; s4, the pump cover is connected with the upper pump body, and an impeller sealing ring groove in the upper pump body is machined till the size meets the requirement; s5, the pump cover is dismounted; s6, part of the plane of the pump cover is machined, and a new plane is formed; s7, the pump cover in the step S6 is connected with a lower pump body, and an impeller sealing ring groove in the lower pump body is machined till the size meets the requirement; and disassembling the pump cover. The mode that the upper pump body and the lower pump body of the axially split pump are separately and independently machined is adopted, due to the fact that the pump cover is a simplified pump body and is simple in structure, a boring cutter can enter the semi-circular hole of the pump cover very easily, the requirement for normal hole machining is met, meanwhile, size measurement in the machining process is facilitated, and the machining problem of the axially split pump with a small opening and a large belly is solved.

Description

Technical Field

[0001] The invention relates to the technical field of pump casing processing, and in particular to a method for processing a split-case pump. Background Art

[0002] like Figure 1 and 2 The pump body structure of a new type of split case pump is shown in FIG. Figure 1 It is the lower pump body. Figure 2 This type of pump body has a special structural design, with the bearing holes on both sides having a diameter of 90mm and the impeller seal groove having a diameter of 2700mm. +0.025 mm, the pump body structure is small mouth and big belly, the aperture machining accuracy of the sealing ring groove is too high. For conventional split pumps, when the inner and outer apertures are not much different, the upper and lower pump bodies are usually assembled and directly bored, and the boring tool can enter the inner hole machining part along the hole wall eccentrically. However, the inner and outer diameters of this type of split pump differ by 180mm, and the outer hole diameter is only 90mm, which is obviously impossible to process by conventional technology. Therefore, a new processing method needs to be designed for this special pump body structure. Summary of the invention

[0003] The purpose of the present invention is to provide a method for processing a split case pump, so as to solve the above-mentioned problem of processing a pump body with a relatively large difference in inner and outer apertures.

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

[0005] S1: Pre-cast a pump cover with a semicircular hole that matches the diameter of the impeller seal groove. S2: Process a flat surface on the installation surface of the pump cover;

[0006] S3: machining bolt holes on the plane for connection with the upper pump body;

[0007] S4: Connect the pump cover in step S3 to the upper pump body by bolts. After connection, use a boring tool to process the impeller sealing ring groove on the upper pump body until the size meets the design requirements;

[0008] S5: Remove the pump cover;

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

[0010] S7: Connect the pump cover in step S6 to the lower pump body by bolts. After connection, use a boring tool to process the impeller sealing ring groove on the lower pump body until the size meets the design requirements;

[0011] S8: Remove the pump cover.

[0012] Another method for processing a split-case pump includes the following steps: S1: pre-casting a pump cover, the pump cover having a semicircular hole matching the aperture of the impeller sealing ring groove;

[0013] S2: Process a flat surface on the installation surface of the pump cover;

[0014] S3: machining bolt holes on the plane for connection with the lower pump body;

[0015] S4: Connect the pump cover in step S3 to the lower pump body by bolts. After connection, use a boring tool to process the impeller sealing ring groove on the lower pump body until the size meets the design requirements;

[0016] S5: Remove the pump cover;

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

[0018] S7: Connect the pump cover in step S6 to the upper pump body by bolts. After connection, use a boring tool to process the impeller sealing ring groove on the upper pump body until the size meets the design requirements;

[0019] S8: Remove the pump cover.

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

[0021] Furthermore, in the steps S2 and S6, a plane milling process is adopted.

[0022] Furthermore, in step S3, the plane of the pump cover matches the flange end surface of the upper pump body.

[0023] Furthermore, the pump cover includes an arc-shaped plate, with an end plate provided at each end of the arc-shaped plate, the inner side of the end plate is used to be processed into the plane, the bolt hole passes through the end plate up and down, and a through hole in the middle of the arc-shaped plate is provided in the up and down directions.

[0024] Beneficial effects of the present invention:

[0025] The processing method of the present invention adopts a method of processing the upper pump body and the lower pump body of the split center pump separately and independently. When processing one of the pump bodies, the cast pump cover is used as the other half of the split center pump. Since the pump cover has a simple structure, the semicircular hole of the pump cover is very easy for a boring tool to enter, which not only meets the normal processing hole requirements, but also facilitates the measurement of dimensions during the processing, thereby solving the problem that the split center pump has a small overall opening and a large belly that is inconvenient to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the structural diagram of the lower pump body of the pump to be processed;

[0027] Figure 2This is the structural diagram of the upper pump body of the pump to be processed;

[0028] Figure 3 yes Figure 1 Local structure view in ;

[0029] Figure 4 This is a three-dimensional image 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 three-dimensional picture of the pump cover after the bolt holes are processed;

[0032] Figure 7 It is a flow chart of the split-center pump processing method.

[0033] 1. Lower pump body; 2. Impeller sealing 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. Plane. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] Embodiment 1 of the present invention:

[0036] like Figure 1-Figure 5 As shown, a method for processing a split pump comprises the following steps:

[0037] A method for processing a split-center pump comprises the following steps:

[0038] The lower pump body 1 and the upper pump body 4 to be processed are as follows: Figure 1 and 2 As shown, this embodiment is to process the impeller sealing ring groove 2, and the design size is

[0039] S1: Pre-cast a pump cover 5, such as Figure 4As shown, the pump cover 5 has a semicircular hole 55 that matches the aperture of the impeller sealing ring groove 2, and the two can form a complete circular hole after matching. The pump cover 5 is used as a pump body during processing, and the structure does not need to be as complicated as the pump body, as long as it can meet the requirements of processing a full circular hole. The pump cover 5 includes an arc-shaped plate 51, and the semicircular hole 55 is formed on the inner side of the arc-shaped plate 51, and an end plate 53 is provided at both ends of the arc-shaped plate 51. A through hole 52 in the upper and lower directions is provided in the middle of the arc-shaped plate 51, which further simplifies the structure and facilitates the dimensional measurement in the subsequent processing process. After the through hole 52 is set, the arc-shaped plate 51 has two C-shaped plates, and the C-shaped plate has the semicircular hole 55.

[0040] S2: Processing a plane 56 on the mounting surface of the pump cover 5, such as Figure 5 That is, the inner side of the end plate 53 is processed into the plane 56. Since the pump cover 5 is a casting, it needs to be further processed to ensure that it is flat 56 degrees and used as an installation plane. The process of milling the plane 56 can be adopted.

[0041] S3: Figure 6 As shown, bolt holes 54 are processed on the plane 56 for connection with the upper pump body 4 ; the bolt holes 54 penetrate the end plates 53 from top to bottom, and two bolt holes 54 are processed on each end plate 53 .

[0042] S4: The pump cover 5 in step S3 is connected to the upper pump body 4 by bolts. The plane 56 processed on one side of the pump cover 5 is matched with the flange end face of the upper pump body 4, and is bolted after correspondingly matching with some bolt holes 54 on the flange end face. Then, the impeller sealing ring groove 2 on the upper pump body 4 is processed by a boring tool until the size meets the design requirements; the diameter of the impeller sealing ring meets the design size At this time, the semicircular hole 55 of the pump cover 5 is also processed to meet the design size.

[0043] S5: Remove the pump cover 5.

[0044] S6: machining a part of the plane 56 of the pump cover 5 to form a new plane, which can be processed by milling. The reason for machining a new plane is to reduce the diameter of the semicircular hole 55 on the pump cover 5 after boring, so that there is still a machining margin after the subsequent connection with the lower pump body 1. The thickness machined in this step can be selected to be about 5mm, and there is no strict requirement.

[0045] S7: Connect the pump cover 5 in step S6 to the lower pump body 1 by bolts, and the new plane 56 of the pump cover 5 is matched with the flange end face of the upper pump body 4. After connection, use a boring tool to process the impeller seal ring groove 2 at the lower pump body 1 until the size meets the design requirements. The diameter of the impeller seal ring at the lower pump body 1 meets the design size At this time, the semicircular hole 55 of the pump cover 5 newly formed in step S6 is also processed to meet the design size;

[0046] S8: Remove the pump cover 5.

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

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

[0049] By adopting the method of the present invention, the upper pump body 4 and the lower pump body 1 of the split center pump are processed separately. When processing one of them, the cast pump cover 5 is used as the other half of the split center pump. Since the pump cover 5 has a simple structure, the semicircular hole 55 of the pump cover 5 is very easy for a boring tool to enter, and the processing process is also convenient for measuring the size, which solves the problem that the split center pump has a small overall opening and a large belly and is not easy to process.

[0050] In the above embodiment, the upper pump body is processed first, but the lower pump body can also be processed first, only the order is different, and the rest are the same. For each step, refer to embodiment 2.

[0051] Embodiment 2 of the present invention:

[0052] like Figure 1-Figure 5 As shown, a method for processing a split-center pump includes the following steps: S1: pre-casting a pump cover 5, the pump cover 5 having a semicircular hole 55 adapted to the aperture of the impeller sealing ring groove;

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

[0054] S3: machining bolt holes 54 on the plane for connection with the lower pump body 1;

[0055] S4: Connect the pump cover in step S3 to the lower pump body 1 by bolts. After connection, use a boring tool to process the impeller sealing ring groove 2 on the lower pump body until the size meets the design requirements;

[0056] S5: Remove the pump cover 5;

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

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

[0059] S8: Remove the pump cover 5.

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

Claims

1. A method for processing a split case pump, characterized in that: The method comprises the following steps: S1: pre-casting a pump cover, wherein the pump cover has a semicircular hole adapted to the aperture of the impeller sealing ring groove; S2: Process the installation surface of the pump cover into a flat surface; S3: machining bolt holes on the plane for connection with the upper pump body; S4: Connect the pump cover in step S3 to the upper pump body with bolts. After connection, use a boring tool to process the impeller sealing ring groove on the upper pump body until the size meets the design requirements; S5: Remove the pump cover; S6: machining a portion of the plane of the pump cover to form a new plane; S7: Connect the pump cover in step S6 to the lower pump body with bolts. After connection, use a boring tool to process the impeller sealing ring groove on the lower pump body until the size meets 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 processed successively.

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

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 is matched with the flange end surface of the upper pump body.

5. The method for processing a split case pump according to any one of claims 1 to 4, characterized in that: The pump cover includes an arc-shaped plate, with an end plate provided at each end of the arc-shaped plate. The inner side of the end plate is used to be processed into the plane. The bolt holes pass through the end plate up and down, and a through hole is provided in the middle of the arc-shaped plate in the up and down directions.

6. A method for processing a split case pump, characterized in that: The method comprises the following steps: S1: pre-casting a pump cover, wherein the pump cover has a semicircular hole adapted to the aperture of the impeller sealing ring groove; S2: Process the installation surface of the pump cover into a flat surface; S3: machining bolt holes on the plane for connection with the lower pump body; S4: Connect the pump cover in step S3 to the lower pump body with bolts. After connection, use a boring tool to process the impeller sealing ring groove on the lower pump body until the size meets the design requirements; S5: Remove the pump cover; S6: machining a portion of the plane of the pump cover to form a new plane; S7: Connect the pump cover in step S6 to the upper pump body with bolts. After connection, use a boring tool to process the impeller sealing ring groove on the upper pump body until the size meets the design requirements; S8: Remove the pump cover.

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

8. The method for processing a split case pump according to claim 6, characterized in that: In the steps S2 and S6, a plane milling process is adopted.

9. The method for processing a split case pump according to claim 6, characterized in that: In step S3, the plane of the pump cover is matched with the flange end surface of the upper pump body.

10. The method for machining a split case pump according to any one of claims 6 to 9, characterized in that: The pump cover includes an arc-shaped plate, with an end plate provided at each end of the arc-shaped plate. The inner side of the end plate is used to be processed into the plane. The bolt holes pass through the end plate up and down, and a through hole is provided in the middle of the arc-shaped plate in the up and down directions.

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