Split type volute assembly for integral gear type compressor

Abstract

The utility model provides a split type volute assembly for an integral gear type compressor, which is mainly used for solving the problems of large casting difficulty, large volute assembly weight, high hoisting capability requirement, large impeller assembly weight, large cantilever moment, difficulty in assembly operation, low cost and the like of the existing volute assembly for medium and large integral gear type compressors. And the connection condition of the rotor piece is not convenient to check. The split type volute assembly comprises a volute, a first half flange and a second half flange. The first half flange and the second half flange are assembled to form a flange plate, bolts are adopted to penetrate through the corresponding first through holes, and the first half flange and the second half flange are connected with the volute correspondingly; an arc-shaped reinforcing rib is arranged on the side, away from the volute, of the second half flange, the inner arc face of the arc-shaped reinforcing rib is connected with the second half flange, an axial gap is reserved between the outer arc face of the arc-shaped reinforcing rib and the second half flange, bolts penetrate through the corresponding second through holes, and the arc-shaped reinforcing rib is connected with the gear box half flange.

Description

Technical Field

[0001] The utility model relates to an integral gear type compressor, in particular to a split volute assembly for the integral gear type compressor. Background Art

[0002] An integrally geared compressor is a device that integrates a gearbox and a compressor. One of the main interfaces between the compressor and the gearbox is the connection between the volute assembly and the gearbox housing. The volute assembly is connected to the gearbox through a semi-flange and bolts, and a complete medium gas pressurization space that meets the requirements of fluid dynamics is formed inside the volute assembly. When the medium gas is pressurized by the impeller and flows into the volute assembly, pressure energy conversion is further realized, ultimately providing gas pressure and flow that meet industrial needs.

[0003] Conventional volutes are cast as an integral part, and then fastened to the gearbox body by bolts and half flanges. For small and medium-sized integral gear compressors, this method has a simple volute structure and is not difficult to cast. After the volute is fastened to the gearbox, the impeller is connected to the gear shaft by a special lifting tool. Since the weight and size of the impeller are relatively small, good assembly and assembly can be achieved. However, for medium and large compressors, if the integral volute structure is also used, casting is difficult, and the volute assembly is heavy, the lifting capacity requirements are high, the impeller assembly is heavy, the cantilever torque is large, and the assembly operation is difficult, and it is not convenient to check the connection of the assembled rotor parts. Utility Model Content

[0004] The purpose of the utility model is to provide a split volute assembly for an integrally geared compressor, which is mainly used to solve the technical problems of the existing volute assembly for medium and large integrally geared compressors, such as great difficulty in casting, heavy weight of the volute assembly, high lifting capacity requirement, heavy weight of the impeller assembly, large cantilever torque, difficult assembly operation, and inconvenience in checking the connection status of the rotor parts.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A split volute assembly for an integrally geared compressor is used to connect to a gearbox through a gearbox half flange, and its special features are:

[0007] It includes a volute, a first half flange and a second half flange;

[0008] The first half flange and the second half flange are assembled to form a flange plate, which is located on the side of the volute close to the gear box; the outer edges of the first half flange and the second half flange are respectively provided with a plurality of first through holes along the axial direction, and bolts are passed through the corresponding first through holes to respectively connect the first half flange and the second half flange to the volute;

[0009] The second half flange is provided with an arc-shaped reinforcement rib on a side away from the volute, the inner arc surface of the arc-shaped reinforcement rib is connected to the second half flange, and an axial gap is left between the outer arc surface and the second half flange;

[0010] The two end portions of the arc-shaped reinforcing rib along the arc length are respectively parallel to the end faces of the second half flange and the connecting end of the first half flange; a plurality of second through holes are axially provided on the arc-shaped reinforcing rib, and bolts are passed through the corresponding second through holes to connect the arc-shaped reinforcing rib to the gear box half flange;

[0011] The first half flange and the second half flange are respectively provided with arc notches of equal size at the center. After the first half flange and the second half flange are assembled, the two arc notches form a circular through hole for the gear shaft and the shaft end seal to pass through.

[0012] Furthermore, a connecting beam is provided on one side of the connection between the first half flange and the second half flange away from the volute, and a plurality of third through holes are provided on the two connecting beams respectively, and the first half flange and the second half flange are assembled by passing bolts through the corresponding third through holes.

[0013] Furthermore, it also includes a first positioning unit;

[0014] The first positioning unit includes a keyway, a positioning key and a clamping slot; the keyway is arranged on the end face of the arc-shaped reinforcement rib away from the second half flange; the clamping slot is arranged on the gear box half flange, and the positions of the keyway and the clamping slot correspond to each other; one end of the positioning key is key-connected to the keyway, and the other end is clamped in the clamping slot.

[0015] Furthermore, the keyway and the positioning key are correspondingly provided with a plurality of groups of coaxial threaded holes.

[0016] Furthermore, it also includes a second positioning unit;

[0017] The second positioning unit includes two lifting blocks symmetrically arranged at both ends of the arc-shaped reinforcement rib along the arc length; each lifting block is provided with two fourth through holes with parallel axes, and screws are passed through the corresponding fourth through holes to fix the two ends of the lifting block to the end faces of the arc-shaped reinforcement rib and the end faces of the gear box half flange respectively.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] 1. The split volute assembly for the integral gear compressor of the utility model effectively solves the problem of complex wooden mold structure caused by the integral volute structure by designing the original integral volute assembly into a split structure of a volute, a first half flange and a second half flange. After the integral structure is split, the structure of each component is simple and easy to cast. At the same time, it is also beneficial to reduce and eliminate defects in the casting process of medium and large integral volute castings, thereby improving the reliability of compressor operation.

[0020] 2. In the split volute assembly for the integral gear compressor of the utility model, connecting beams are respectively provided on the side of the connection between the first half flange and the second half flange away from the volute, and a plurality of third through holes are respectively provided on the two connecting beams. Bolts are passed through the corresponding third through holes to realize the assembly of the first half flange and the second half flange. When the rotor part needs to be inspected after the assembly, it is only necessary to disconnect the first half flange from the second half flange and the volute respectively, so as to quickly check the connection condition of the rotor part.

[0021] 3. The split volute assembly for the integral gear compressor of the utility model further includes a first positioning unit and a second positioning unit, which can realize the rapid positioning connection between the second half flange and the gear box half flange, thereby improving the coaxiality and stability of the connection between the volute and the gear box.

[0022] 4. The split volute assembly for the integrally geared compressor of the utility model reduces the maximum weight of the lifting parts and the capacity requirements of the lifting equipment through the design of the split structure, thus realizing a replacement solution when the lifting capacity is insufficient or the lifting is limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a split volute assembly for an integral gear type compressor of the utility model;

[0024] Figure 2 It is a schematic diagram of the connection state of the first half flange and the second half flange in an embodiment of a split volute assembly for an integral gear type compressor of the utility model;

[0025] Figure 3 It is a structural schematic diagram of a positioning key in an embodiment of a split volute assembly for an integral gear type compressor of the utility model;

[0026] Figure 4 It is a structural schematic diagram of a lifting block in an embodiment of a split volute assembly for an integral gear type compressor of the utility model;

[0027] Figure 5 The utility model is a schematic structural diagram of a volute assembly and a gear box after being assembled in an embodiment of a split volute assembly for an integral gear type compressor.

[0028] The reference numerals are as follows:

[0029] 1-gearbox half flange, 2-gearbox, 3-volute, 4-first half flange, 41-first through hole, 5-second half flange, 51-arc reinforcement rib, 511-second through hole, 6-connecting beam, 61-third through hole, 7-first positioning unit, 71-keyway, 72-positioning key, 73-threaded hole, 8-second positioning unit, 81-lifting block, 811-fourth through hole. DETAILED DESCRIPTION

[0030] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0031] like Figure 1 , Figure 2 , Figure 5 As shown, this embodiment provides a split volute assembly for an integral gear compressor, which is used to connect to a gear box 2 through a gear box half flange 1. The split volute assembly is mainly designed to be a split structure of a volute 3, a first half flange 4 and a second half flange 5 of the original integral volute assembly, thereby effectively solving the problem of complex wooden mold structure caused by the integral volute structure and reducing the difficulty of volute casting.

[0032] The first half flange 4 and the second half flange 5 are assembled to form a flange plate, which is located on the side of the volute 3 close to the gear box 2, wherein the first half flange 4 is located above the second half flange 5. The outer edges of the first half flange 4 and the second half flange 5 are respectively provided with a plurality of first through holes 41 along the axial direction, and bolts are passed through the corresponding first through holes 41 to connect the first half flange 4 and the second half flange 5 to the volute 3 respectively.

[0033] A connecting beam 6 is provided on the side of the connection between the first half flange 4 and the second half flange 5 away from the volute 3, and a plurality of third through holes 61 are provided on the two connecting beams 6. Bolts are passed through the corresponding third through holes 61 to achieve assembly of the first half flange 4 and the second half flange 5.

[0034] The first half flange 4 and the second half flange 5 are respectively provided with arc notches of equal size at the center. After the first half flange 4 and the second half flange 5 are assembled, the two arc notches form a circular through hole for the gear shaft and the shaft end seal to pass through and install.

[0035] An arc-shaped reinforcing rib 51 is provided on the side of the second half flange 5 away from the volute 3. The inner arc surface of the arc-shaped reinforcing rib 51 is connected to the second half flange 5, and an axial gap is left between the outer arc surface and the second half flange 5, so as to leave operating space when the arc-shaped reinforcing rib 51 is connected to the gear box half flange 1.

[0036] The two ends of the arc-shaped reinforcing rib 51 along the arc length are respectively parallel to the end faces of the connecting ends of the second half flange 5 and the first half flange 4. A plurality of second through holes 511 are axially provided on the arc-shaped reinforcing rib 51 (the second through holes 511 are connected to the above-mentioned axial gap), and bolts are passed through the corresponding second through holes 511 to connect the arc-shaped reinforcing rib 51 to the gearbox half flange 1.

[0037] Combination Figure 1 , Figure 3 and Figure 4 As shown, in order to improve the coaxiality and stability of assembly, this embodiment further includes a first positioning unit 7 and a second positioning unit 8.

[0038] The first positioning unit 7 includes a keyway 71, a positioning key 72 and a clamping slot; the keyway 71 is arranged on the end face of the arc-shaped reinforcement rib 51 away from the second half flange 5; the clamping slot is arranged on the gearbox half flange 1, and the keyway 71 corresponds to the position of the clamping slot; one end of the positioning key 72 is key-connected with the keyway 71, and the other end is clamped in the clamping slot, so as to achieve rapid assembly and improve assembly efficiency. A plurality of groups of coaxial threaded holes 73 are correspondingly arranged on the keyway 71 and the positioning key 72, and matching connecting bolts can be selected to pass through the corresponding threaded holes 73 to connect and fix the keyway 71 and the positioning key 72.

[0039] The second positioning unit 8 includes two lifting blocks 81 symmetrically arranged at both ends of the arc-shaped reinforcement rib 51 along the arc length; each lifting block 81 is respectively provided with two fourth through holes 811 with parallel axes, and screws are passed through the corresponding fourth through holes 811 to fix the two ends of the lifting block 81 to the end faces of the arc-shaped reinforcement rib 51 and the end faces of the gear box half flange 1 respectively.

[0040] Combination Figures 1 to 5 As shown, based on the volute assembly of this embodiment, the assembly process of the gearbox and the volute assembly of the integral gear compressor is specifically as follows:

[0041] First, the first half flange 4 and the second half flange 5 are assembled to form a flange plate, and the installation position of the flange plate is adjusted by combining the first positioning unit 7 and the second positioning unit 8. Finally, the flange plate is tightened to the gear box half flange 1 by bolts.

[0042] Secondly, install the shaft end seal and tighten it into the annular notch of the flange with bolts.

[0043] Again, the impeller 1 is tightened onto the gear shaft by means of a hydraulic disassembly and assembly tool, during which the installation status can be visually observed, which is more convenient and intuitive.

[0044] Then, the volute 3 is hoisted and connected to the flange. During installation, the volute 3 and the flange can be positioned in the radial direction by means of the stoppers and tightened in the axial direction by means of bolts passing through the corresponding first through holes 41 .

[0045] Finally, the diffuser assembly is installed into the volute, thereby completing the assembly of the gearbox and volute assembly.

[0046] When the connection of the rotor parts needs to be checked, the first half flange 4 can be disconnected from the second half flange 5 and the volute 3 respectively, and the first half flange 4 can be removed for inspection.

[0047] The flange in this embodiment (assembled from the first half flange 4 and the second half flange 5) is directly connected to the gear box body through the gear box half flange 1, so it bears a greater bending moment and has higher load-bearing requirements. Therefore, better cast iron materials or cast steel parts can be used for the flange to achieve higher hardness and strength to meet the local high-load working environment; and the volute can be made of a material with relatively low hardness, so as to achieve effective utilization of materials and complementary advantages.

[0048] The utility model discloses a split volute assembly for an integral gear compressor. By means of reasonable assembly technology, the assembly sequence and operating procedures of the impeller assembly, flange, volute and other parts are planned, which facilitates real-time observation of the installation process of the impeller assembly and better ensures installation accuracy while preventing collision.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made based on this embodiment should be deemed to fall within the protection scope of the present invention.

Claims

1. A split volute assembly for an integrally geared compressor, used to connect to a gearbox (2) via a gearbox half flange (1), characterized in that: It comprises a volute (3), a first half flange (4) and a second half flange (5); The first half flange (4) and the second half flange (5) are assembled to form a flange plate, which is located on a side of the volute (3) close to the gear box (2); the outer edges of the first half flange (4) and the second half flange (5) are respectively provided with a plurality of first through holes (41) along the axial direction, and bolts are passed through the corresponding first through holes (41) to respectively connect the first half flange (4) and the second half flange (5) to the volute (3); An arc-shaped reinforcing rib (51) is provided on a side of the second half flange (5) away from the volute (3); an inner arc surface of the arc-shaped reinforcing rib (51) is connected to the second half flange (5), and an axial gap is left between the outer arc surface and the second half flange (5); The two end portions of the arc-shaped reinforcing rib (51) along the arc length are respectively parallel to the end surfaces of the connecting ends of the second half flange (5) and the first half flange (4); a plurality of second through holes (511) are axially provided on the arc-shaped reinforcing rib (51), and bolts are passed through the corresponding second through holes (511) to connect the arc-shaped reinforcing rib (51) to the gear box half flange (1); The first half flange (4) and the second half flange (5) are respectively provided with arc-shaped notches of equal size at their centers. After the first half flange (4) and the second half flange (5) are assembled, the two arc-shaped notches form a circular through hole for the gear shaft and the shaft end seal to pass through.

2. The split volute assembly for an integrally geared compressor according to claim 1, characterized in that: A connecting beam (6) is provided on the side of the connection between the first half flange (4) and the second half flange (5) away from the volute (3), and a plurality of third through holes (61) are provided on the two connecting beams (6). Bolts are passed through the corresponding third through holes (61) to realize the assembly of the first half flange (4) and the second half flange (5).

3. The split volute assembly for an integrally geared compressor according to claim 1 or 2, characterized in that: It also includes a first positioning unit (7); The first positioning unit (7) comprises a keyway (71), a positioning key (72) and a clamping slot; the keyway (71) is arranged on the end surface of the arc-shaped reinforcing rib (51) on the side away from the second half flange (5); the clamping slot is arranged on the gear box half flange (1), and the positions of the keyway (71) and the clamping slot correspond; one end of the positioning key (72) is key-connected to the keyway (71), and the other end is clamped in the clamping slot.

4. The split volute assembly for an integrally geared compressor according to claim 3, characterized in that: The keyway (71) and the positioning key (72) are correspondingly provided with a plurality of groups of coaxial threaded holes (73).

5. The split volute assembly for an integrally geared compressor according to claim 4, characterized in that: Also includes a second positioning unit (8); The second positioning unit (8) comprises two lifting blocks (81) symmetrically arranged at both ends of the arc-shaped reinforcement rib (51) along the arc length; each lifting block (81) is provided with two fourth through holes (811) with parallel axes, and screws are passed through the corresponding fourth through holes (811) to fix the two ends of the lifting block (81) to the end faces of the arc-shaped reinforcement rib (51) and the end faces of the gear box half flange (1), respectively.

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