CN-122014831-A - Integrally welded type multi-shaft centrifugal compressor gear box body and welding method thereof

CN122014831ACN 122014831 ACN122014831 ACN 122014831ACN-122014831-A

Abstract

The invention discloses an integrally welded multi-shaft centrifugal compressor gear box body and a welding method thereof, belongs to the technical field of compressor gear box preparation, and solves the problems of high die cost, long period and high weight risk caused by an integrally cast processing mode of a traditional gear box; the oil-return box comprises an upper box body and a lower box body, wherein the upper box body comprises a front middle panel, a rear middle panel, a front side plate, a rear side plate, a left side plate, a right side plate, a cover plate assembly, a front oil inlet pipe assembly, a rear oil inlet pipe assembly, a guide cover and reinforcing ribs, and the lower box body comprises a front middle panel, a rear middle panel, a front side plate, a rear side plate, a left side plate, a right side plate, a bottom plate, an oil-return cavity plate and a guide cover. In the invention, a mode of mainly welding and secondarily processing is adopted, so that products circulate among different working procedures, the time is shortened to the maximum extent, the key size and the integral strength of a welded gear box are ensured by virtue of the characteristics of quick processing and convenient control of welding, the subsequent influence of welding deformation is reduced to the minimum, and the problems of large and various casting defects and shortened manufacturing period and cost are effectively avoided.

Inventors

ZHE BOWEN
WANG XIAOSONG
WEI WEI
FAN DONGSHENG
LUO WENRUI
YE RUI
DENG CHAO

Assignees

成都电气有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (10)

1. The integral welding type multi-shaft centrifugal compressor gear box body is characterized by comprising an upper box body (1) and a lower box body (2) arranged at the bottom of the upper box body (1); The upper box body (1) comprises an upper box body front middle division panel (3) and an upper box body rear middle division panel (4), wherein the tops of the upper box body front middle division panel (3) and the upper box body rear middle division panel (4) are respectively connected with an upper box body front side plate (5) and an upper box body rear side plate (6), two sides of the upper box body front side plate (5) and the upper box body rear side plate (6) are respectively connected with an upper box body left side plate (7) and an upper box body right side plate (8), and the tops of the upper box body front side plate (5) and the upper box body rear side plate (6) are connected with a cover plate assembly (9); The lower box body (2) comprises a lower box body front middle division panel (16) and a lower box body rear middle division panel (17), wherein the bottoms of the lower box body front middle division panel (16) and the lower box body rear middle division panel (17) are respectively connected with a lower box body front side plate (19) and a lower box body rear side plate (20), two sides of the lower box body front side plate (19) and the lower box body rear side plate (20) are respectively connected with a lower box body left side plate (22) and a lower box body right side plate (23), and the tops of the lower box body left side plate (22) and the lower box body right side plate (23) are connected with a bottom plate (18); The upper box front middle division panel (3) is connected with the lower box front middle division panel (16), and the upper box rear middle division panel (4) is connected with the lower box rear middle division panel (17).
2. The integrally welded multi-shaft centrifugal compressor gearbox body of claim 1, wherein a plurality of semicircular bearing mounting holes are formed in the upper box front middle partition panel (3) and the upper box rear middle partition panel (4), a plurality of semicircular bearing mounting holes are formed in the lower box front middle partition panel (16) and the lower box rear middle partition panel (17), the semicircular bearing mounting holes of the upper box front middle partition panel (3) correspond to the semicircular bearing mounting holes of the lower box front middle partition panel (16), and the semicircular bearing mounting holes of the upper box rear middle partition panel (4) correspond to the semicircular bearing mounting holes of the lower box rear middle partition panel (17).
3. The integrally welded multi-shaft centrifugal compressor gear housing of claim 2, wherein the number of semicircular bearing mounting holes is three, and the three semicircular bearing mounting holes correspond to the input shaft hole, the high-speed shaft hole and the low-speed shaft hole, respectively.
4. The integrally welded multi-shaft centrifugal compressor gearbox casing according to claim 2, wherein a front oil inlet pipe assembly (11) and a rear oil inlet pipe assembly (12) are respectively arranged on two sides of the upper casing (1); The front oil inlet pipe assembly (11) and the rear oil inlet pipe assembly (12) comprise a main transverse pipe and a plurality of branch vertical pipes connected to the main transverse pipe, the main transverse pipe of the front oil inlet pipe assembly (11) and the main transverse pipe of the rear oil inlet pipe assembly (12) are respectively arranged on the outer sides of the front side plate (5) and the rear side plate (6) of the upper box body, and the branch vertical pipes of the front oil inlet pipe assembly (11) and the branch vertical pipes of the rear oil inlet pipe assembly (12) are respectively led into semicircular bearing mounting holes on the front middle partition plate (3) and the rear middle partition plate (4) of the upper box body.
5. The integrally welded multi-shaft centrifugal compressor gearbox casing according to claim 4, wherein a front rib plate (13) and a rear rib plate (14) are respectively arranged on the outer sides of the front side plate (5) and the rear side plate (6) of the upper casing, the front rib plate (13) and the rear rib plate (14) are of three-section integrated T-shaped structures, and the vertical ribs at the bottom of the T-shaped structures are in butt joint with the bearing upper cover excircles of the front middle partition panel (3) and the rear middle partition panel (4) of the upper casing; The vertical ribs of the front rib plate (13) and the rear rib plate (14) and the semicircular bearing mounting holes of the upper box front middle partition panel (3) and the upper box rear middle partition panel (4) are sequentially inserted into the semicircular bearing mounting holes of the upper box front middle partition panel (3) and the upper box rear middle partition panel (4), and an oil inlet groove is arranged between the semicircular bearing mounting holes of the upper box front middle partition panel (3) and the upper box rear middle partition panel (4) and the sealing body mounting holes and is communicated with the vertical ribs.
6. The gear box body of the integrally welded multi-shaft centrifugal compressor, which is disclosed in claim 4, is characterized in that oil return cavity plates (21) are arranged on two sides of a front side plate (19) of the lower box body and a rear side plate (20) of the lower box body, the top of each oil return cavity plate (21) is connected with the outer circles of bearing seats of a front middle partition plate (16) of the lower box body and a rear middle partition plate (17) of the lower box body, oil return cavities in the oil return cavity plates (21) are respectively communicated with oil return holes of the front middle partition plate (16) of the lower box body and the bearing seats of the rear middle partition plate (17) of the lower box body, the bottoms of the oil return cavity plates (21) are connected with the bottom plate (18), and oil return cavities in the oil return cavity plates (21) are respectively communicated with the oil return holes on the bottom plate (18).
7. The integral welding type multi-shaft centrifugal compressor gearbox casing according to claim 1 is characterized in that an upper casing guide cover (15) is arranged in the upper casing (1), the upper casing guide cover (15) is connected between the upper casing front side plate (5) and the upper casing rear side plate (6), and the upper casing guide cover (15) is of an upward-bending arc-shaped structure; The novel box comprises a lower box body (2), wherein a lower box body guide cover (24) is arranged in the lower box body (2), the lower box body guide cover (24) is connected between a lower box body front side plate (19) and a lower box body rear side plate (20), and the lower box body guide cover (24) is of a downward bent arc-shaped structure.
8. The integrally welded multi-shaft centrifugal compressor gearbox housing of claim 1, wherein two lifting lugs (10) are welded on the upper left side plate (7) and the upper right side plate (8) respectively.
9. A method of welding an integrally welded multi-shaft centrifugal compressor gearbox casing according to any one of claims 1 to 8, comprising the steps of: S1, placing a front middle division panel (3) of an upper box body which is subjected to auxiliary machining and a rear middle division panel (4) of the upper box body on the same horizontal plane, and positioning and fixing according to the requirement of inner side parallelism; step S2, vertically butting an upper box front side plate (5) with an upper box front middle division panel (3), vertically butting an upper box rear side plate (6) with an upper box rear middle division panel (4), combining and fixing after butting, and fully welding, wherein semicircular holes on the upper box front side plate (5) are aligned with semicircular holes on the upper box front middle division panel (3) during butting, and semicircular holes on the upper box rear side plate (6) are aligned with semicircular holes on the upper box rear middle division panel (4); Welding process reinforcing ribs between the front side plate (5) of the upper box body and the rear side plate (6) of the upper box body, respectively placing the left side plate (7) of the upper box body and the right side plate (8) of the upper box body in the front side plate (5) of the upper box body and the rear side plate (6) of the upper box body, wherein the width of the side plates is the thickness of the upper box body; step S3, respectively welding a front rib plate (13) and a rear rib plate (14) on the outer walls of the front side plate (5) and the rear side plate (6) of the upper box body, aligning vertical ribs at the lower sections of the front rib plate (13) and the rear rib plate (14) with the tops of bearing upper covers at the bottoms of the front middle division panel (3) and the rear middle division panel (4) of the upper box body, combining and fixing lifting lugs (10) according to the alignment requirement with the left side plate (7) and the right side plate (8) of the upper box body, and completely welding; s4, performing heat treatment on the welded upper box body (1), and dismantling process reinforcing ribs; S5, checking the surface flatness of the bottom plate (18) which is subjected to auxiliary machining, placing the bottom plate (18) on a welding platform, and marking the positions of all parts; Step S6, aligning the front side plate (19) of the lower box body and the rear side plate (20) of the lower box body with the scribing positions of the bottom plate (18) respectively, and carrying out full welding after combination and fixation; A process reinforcing rib is additionally arranged between a lower box front side plate (19) and a lower box rear side plate (20), a lower box left side plate (22) and a lower box right side plate (23) are respectively arranged between the lower box front side plate (19) and the lower box rear side plate (20), the left side and the right side of a bottom plate (18) are aligned, and full welding is implemented after combination and fixation; Step S7, aligning the front middle division panel (16) of the lower box body and the rear middle division panel (17) of the lower box body with the input shaft holes, the high-speed shaft holes and the low-speed shaft holes of the front side plate (19) of the lower box body and the rear side plate (20) of the lower box body respectively, combining and fixing, and then performing full welding; Step S8, the inner side of a U-shaped groove of an oil return cavity plate (21) is attached and fixed with the outer side wall surface of a front side plate (19) of a lower box body and a rear side plate (20) of the lower box body, the top of the oil return cavity plate (21) is aligned with bearing chambers of a front middle partition plate (16) of the lower box body and a rear middle partition plate (17) of the lower box body respectively, and after the bottom of the oil return cavity plate (21) is aligned with the scribing position of a bottom plate (18) and combined and fixed, full-length welding is implemented; s9, performing heat treatment on the welded lower box body (2), and then dismantling the process reinforcing ribs; And S10, connecting the upper box body front middle division panel (3) and the lower box body front middle division panel (16) through bolts, and connecting the upper box body rear middle division panel (4) and the lower box body rear middle division panel (17) through bolts to finish the forming of the gear box body.
10. The method of welding a integrally welded multi-shaft centrifugal compressor gear housing of claim 9, wherein: before welding, the parts are beveled and then welded.

Description

Integrally welded type multi-shaft centrifugal compressor gear box body and welding method thereof Technical Field The invention relates to the technical field of compressor gear box preparation, in particular to an integrally welded multi-shaft centrifugal compressor gear box and a welding method thereof. Background Compressed air is widely used as a process gas in industrial enterprises, and the demand amount is generally varied from hundreds to thousands of cubic meters. For example, in iron and steel enterprises, compressed air output by an air compression station is mainly used for process gas such as blast furnace ironmaking, steelmaking, steel rolling, sintering, coking, instruments, back blowing, power executing mechanisms and the like, the gas pressure range is mostly between 0.5 and 1.0MPa, and the compressed air belongs to low-pressure compressors (> 0.2 to 1.0 MPa); The gearbox refers to a box body for mounting a 'one input two output' intermeshing gear in a centrifugal air compressor unit. In the gear type multi-shaft centrifugal air compressor unit, a main motor drives a large gear through a coupler, and then the large gear drives a pinion shaft to operate. The gear box body is divided into an upper box body and a lower box body horizontally, and the traditional process adopts an integral casting mode. However, with the trend of product gradually developing to large size, the conventional integral casting method has various problems that firstly, the repeated use rate of the mold is low, so that the manufacturing cost of the mold is excessively high, and secondly, the manufacturability of the casting determines that the quality of the casting is difficult to control, the manufacturing difficulty of the large-size casting is greatly improved, and in addition, the shortening of the manufacturing period of the product brings great challenges to the casting process. For the reasons, the large-sized gear box has high cost, long period and high quality risk, and is difficult to meet the production requirements of enterprises. Disclosure of Invention Aiming at the defects in the prior art, the invention provides an integrally welded multi-shaft centrifugal compressor gear box body and a welding method thereof, which solve the problems of high die cost, long period and high weight risk caused by processing a traditional gear box in an integral casting mode. In order to achieve the above object, the present invention adopts the following technical scheme: The gear box body of the integrally welded multi-shaft centrifugal compressor comprises an upper box body and a lower box body arranged at the bottom of the upper box body, wherein the upper box body comprises an upper box body front middle partition panel and an upper box body rear middle partition panel, and the tops of the upper box body front middle partition panel and the upper box body rear middle partition panel are respectively connected with an upper box body front side plate and an upper box body rear side plate; The lower box body comprises a lower box body front middle division panel and a lower box body rear middle division panel, wherein the bottoms of the lower box body front middle division panel and the lower box body rear middle division panel are respectively connected with a lower box body front side plate and a lower box body rear side plate; the upper box front middle division panel is connected with the lower box front middle division panel, and the upper box rear middle division panel is connected with the lower box rear middle division panel. In the scheme, the middle split panels of the upper box body and the lower box body are of an integral structure, so that enough strength and rigidity are ensured to bear working load, deformation and vibration are effectively reduced, the front side plate of the upper box body, the rear side plate of the upper box body, the front side plate of the lower box body and the rear side plate of the lower box body are connected and formed by adopting a welding process, the integral strength of the gear box body is improved, casting defects can be effectively avoided, and the manufacturing period and the cost are reduced. The upper box body front middle partition panel and the lower box body rear middle partition panel are provided with a plurality of semicircular bearing mounting holes, the lower box body front middle partition panel and the lower box body rear middle partition panel are provided with a plurality of semicircular bearing mounting holes, the semicircular bearing mounting holes of the upper box body front middle partition panel correspond to the semicircular bearing mounting holes of the lower box body front middle partition panel, and the semicircular bearing mounting holes of the upper box body rear middle partition panel correspond to the semicircular bearing mounting holes of the lower box body rear middle partition panel. Further, the number of the semicircular bearing mounti