Large rotor and end cover fixing device

Abstract

The utility model discloses a large rotor and end cover fixing device, which comprises a fixing ring, a baffle and a fastening nut, the fixing ring is positioned between an end cover and a rotor, one side of the fixing ring is provided with a screw hole, the other side of the fixing ring is clamped on a step surface of the rotor, and the rotor is axially and radially fixed through the fixing ring; one end of the baffle is clamped in a reserved groove of the end cover, a connecting unthreaded hole is formed in the baffle, the fixing ring and the baffle are fixed through a bolt, so that the axial positions of the fixing ring and the baffle are fixed, and the fixing ring and the end cover are connected and fixed through the baffle; threads are arranged on the rotor shaft hub, the fastening nut is connected with the shaft hub through the threads, and after the fastening nut is tightened on the rotor, one end face of the fastening nut abuts against the end face of the fixing ring so that the end face of the other side of the fixing ring can tightly abut against a step shaft of the rotor, so that fixation of the rotor and the end cover in the axial direction and the radial direction can be guaranteed, and the rotor can be prevented from being damaged. And the surface of the rotor hub is not damaged when the rotor hub shakes in the hoisting process.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor assembly equipment, in particular to a large rotor and end cover fixing device. Background Art

[0002] The cracking gas compressor is the heart of the ethylene plant. The casing is a horizontally split structure, and the inlet and exhaust end covers connected to the casing are integral structures. During the compressor assembly process, the compressor rotor and the inlet and exhaust end covers must be fixed for lifting and assembly.

[0003] The prior art fixes the rotor and the inlet and exhaust end covers as follows: the rotor is horizontally placed on a support frame, the inlet and exhaust end covers are vertically placed on a movable bracket, the inlet and exhaust end covers are smoothly moved using a support fixture, and the end covers are slowly inserted from the inner holes onto the rotor from both sides of the rotor.

[0004] Since there is no shaft end seal installed in the inner hole of the end cover, the inner hole of the end cover is much larger than the size of the rotor hub. The rotor and the end cover are not fixed and cannot be lifted. A fixing tool is needed to fix the rotor and the end cover together to ensure smooth lifting and protect the rotor hub surface.

[0005] However, the existing fixtures for fixing the rotor and the end cover are not only complex in structure and fail to meet the requirements for axial dimension adjustment during installation, but also pose the risk of being damaged by collision during the assembly and lifting process. Utility Model Content

[0006] The utility model aims to provide a large rotor and end cover fixing device, which can not only ensure the fixing of the axial and radial positions of the rotor and the end cover, but also ensure that the rotor hub surface is not damaged when shaking during lifting.

[0007] The technical solution of the utility model is:

[0008] A large rotor and end cover fixing device comprises: a fixing ring, which is sleeved on the shaft hub of the rotor and is located between the end cover and the rotor, and the outer ring surface of the fixing ring cooperates with the inner side of the end cover channel, and the inner ring surface of the fixing ring cooperates with the outer cylindrical surface of the shaft hub; a baffle, one end of which is clamped in a reserved groove of the end cover, and the plate surface of the baffle is connected and fixed to the annular surface of the fixing ring by a connecting piece, so that the axial positions of the fixing ring and the baffle are fixed, and the fixing ring and the end cover are connected and fixed by the baffle; a fastening nut, a thread is provided on the shaft hub of the rotor, the fastening nut is threadedly connected to the shaft hub, and after the fastening nut is tightened on the rotor, one end face of the fastening nut is pressed against the end face of the fixing ring, so that the fixing ring can be fixed on the stepped shaft end face of the rotor.

[0009] Furthermore, the connecting member includes: a connecting light hole, which is opened on the plate surface of the baffle; a screw hole, which is opened on the annular surface of the fixing ring, and the screw hole and the connecting light hole on the baffle are aligned; a bolt, which can pass through the connecting light hole and be threadedly connected with the screw hole, so as to connect and fix the baffle and the fixing ring.

[0010] Furthermore, in order to facilitate the installation of the baffle, there are multiple baffles, and the multiple baffles are arranged in a circular array with the central axis of the rotor as the axis, and multiple screw holes are opened on the annular surface of one side of the fixing ring, and each screw hole corresponds to a baffle.

[0011] Furthermore, in order to ensure uniform force on the positions of the multiple mounting baffles of the fixing ring and to ensure the fixing effect of each mounting baffle position, each of the baffles is an arc-shaped plate, and the curvature matches the curvature of the reserved groove on the inner side of the end cover, so that the arc surface of the baffle and the arc surface of the reserved groove fit each other.

[0012] Furthermore, in order to allow the fastening nut to press one end of the fixing ring so that the fixing ring can be smoothly clamped, on the stepped shaft of the rotor, the inner side of the fastening nut is configured as a smooth section and a threaded section, the smooth section is located at the front end of the fastening nut in the direction of screwing in, and the threaded section and the shaft hub thread cooperate to press on the fixing ring.

[0013] Furthermore, a soft coating is provided on the inner hole of the fixing ring to prevent the surface of the shaft hub from being damaged due to the shaking and knocking during lifting.

[0014] Furthermore, the soft coating is a babbitt alloy soft material.

[0015] Compared with the prior art, the utility model has a simpler structure and is more convenient to operate than the shaft end seal. It can not only ensure the fixation of the axial and radial positions of the rotor and the end cover, but also ensure that the rotor hub surface is not damaged when shaking during lifting. The specific beneficial effects are as follows:

[0016] The utility model cooperates between a fixing ring, a baffle and a fastening nut. The fixing ring is located between the end cover and the rotor, one side of which is clamped on the step surface of the rotor end face, and a screw hole is provided on the other side. One end of the baffle is clamped in a reserved groove of the end cover, and is fixedly connected by bolts and the fixing ring. The fixing ring is fixed axially to ensure a fixed connection between the fixing ring and the end cover, and the fixing ring is pressed against the step surface of the rotor by the tightening force of the fastening nut on the shaft hub. The rotor is fixed in the axial and circumferential directions by the cooperation between the fixing ring baffle and the fastening nut, thereby improving the stability of the hoisting and assembly process and improving the protection capability of the rotor workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the rotor and end cover assembly structure;

[0018] Figure 2 This is a schematic diagram of the structure of the fixing device of the utility model.

[0019] Among them, 1. end cover, 2. fixing ring, 3. rotor, 4. baffle, 5. fastening nut. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1 and attached Figure 2 , the specific implementation methods of the utility model are described in detail. In the description of the utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0022] Example

[0023] like Figure 1 As shown, the fixing method of the existing rotor end cover fixing device is: the rotor is placed horizontally on the support frame, the inlet and exhaust end covers are placed vertically on the movable bracket, the inlet and exhaust end covers are moved steadily by the support tooling, and the end covers are slowly inserted into the rotor from the inner hole from both sides of the rotor to fix the rotor and the end covers together. However, the shaft end seal of the product is not only complex in structure, but also cannot meet the requirements of axial size adjustment during installation, and there is a risk of collision and damage during the assembly and lifting process.

[0024] A large rotor and end cover fixing device in this embodiment can not only ensure the axial and radial positions of the rotor and the end cover are fixed, but also ensure that the rotor hub surface is not damaged when shaking during lifting. Figure 1-2 As shown, a large rotor and end cover fixing device includes: a fixing ring 2, a baffle 4 and a fastening nut 5, as shown in FIG. Figure 2 As shown, the fixing ring 2 is sleeved on the shaft hub of the rotor 3 and is located between the end cover 1 and the rotor 3. In order to reduce the radial clearance between the outer ring surface of the fixing ring 2 and the inner side of the hole of the end cover 1, and between the inner ring surface of the fixing ring 2 and the outer circle of the rotor, as shown in FIG. Figure 2As shown, the outer ring surface of the fixing ring 2 is matched with the inner side of the hole of the end cover 1, the inner ring surface of the fixing ring 2 is matched with the outer circle of the shaft hub, and the other side of the fixing ring is clamped on the step surface of the rotor end face. The fixing ring is used to ensure the axial and radial fixation of the rotor. Specifically, the position of the screw hole is relatively close to the inner side of the end cover, which is for the convenience of installing the baffle 4; the baffle 4 is used to fix the fixing ring 2 axially so that the fixing ring 2 and the end cover are fixedly connected, as shown in FIG. Figure 2 As shown, one end of the baffle 4 is clamped in the reserved groove of the end cover, and the baffle 4 does not move axially in the reserved groove, and the plate surface of the baffle 4 is connected and fixed to the annular surface of the fixing ring through a connecting piece, so that the axial position of the fixing ring 2 and the baffle 4 is fixed, and the fixing ring 2 and the end cover 1 are connected and fixed through the baffle 4; a thread is provided on the shaft hub of the rotor 3, and the fastening nut 5 is connected to the shaft hub through a thread, and after the fastening nut 5 is tightened on the rotor 3, one end face of the fastening nut 5 abuts against the end face of the fixing ring 2, so that the other side end face of the fixing ring 2 tightly abuts against the step shaft of the rotor 3, and the fixing ring 2 can be fixed on the step shaft end face of the rotor 3 by tightening the fastening nut 5.

[0025] like Figure 2 As shown, the connecting part includes: a connecting light hole, a screw hole and a bolt, the connecting light hole is opened on the plate surface of the baffle 4; the screw hole is opened on the annular surface of the fixing ring 2, and the screw hole and the connecting light hole on the baffle 4 are aligned; the bolt can pass through the connecting light hole and be threadedly connected with the screw hole, so as to connect and fix the baffle 4 and the fixing ring 2.

[0026] In some embodiments, there are multiple baffles 4, and the multiple baffles 4 are arranged in a circular array with the central axis of the rotor 3 as the axis. Similarly, multiple screw holes are opened on the annular surface of one side of the fixing ring 2, and each screw hole corresponds to the connecting light hole of each baffle 4.

[0027] The fixing effect of the fixing ring 3 in the axial position is improved by arranging multiple baffles 4. In order to make the positions of the multiple mounting baffles 4 of the fixing ring 3 bear force evenly and ensure the fixing effect of each mounting baffle 4, each of the baffles 4 is an arc-shaped plate, and the curvature matches the curvature of the reserved groove on the inner side of the end cover 1, so that the arc surface of the baffle 4 and the arc surface of the reserved groove fit each other.

[0028] like Figure 2In the illustrated embodiment, in order to allow the fastening nut 5 to press one end of the fixing ring 2 so as to smoothly press the fixing ring 2 onto the stepped shaft of the rotor 3, the inner side of the fastening nut 5 is configured as a smooth section and a threaded section, and the smooth section is located at the front end of the screwing direction of the fastening nut 5, the threaded section and the shaft hub thread cooperate to make the smooth section abut against the fixing ring 2, and the aperture of the smooth section matches the diameter of the stepped shaft on the shaft hub, and when the threaded end of the fastening nut 5 is tightened on the shaft hub, the fastening nut 5 presses the fixing ring 2 tightly onto the stepped shaft of the rotor 3.

[0029] In some embodiments, in order to prevent the surface of the shaft hub from being damaged due to lifting, shaking and bumping, a soft coating is provided on the inner hole of the fixing ring 2, and the material of the soft coating is a babbitt alloy soft material.

[0030] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A large rotor and end cover fixing device, characterized in that: include: A fixing ring (2) is sleeved on the shaft hub of the rotor (3) and is located between the end cover (1) and the rotor (3), and the outer ring surface of the fixing ring (2) matches the inner side of the hole of the end cover (1), and the inner ring surface of the fixing ring (2) matches the outer circumferential surface of the shaft hub; A baffle (4) is clamped at one end in a reserved groove of the end cover, and the plate surface of the baffle (4) is connected and fixed to the annular surface of the fixing ring (2) via a connecting piece, so that the axial positions of the fixing ring (2) and the baffle (4) are fixed, and the fixing ring (2) and the end cover (1) are connected and fixed via the baffle (4); A fastening nut (5) is provided with a thread on the shaft hub of the rotor (3), the fastening nut (5) is threadedly connected to the shaft hub, and after the fastening nut (5) is tightened on the rotor (3), one end face of the fastening nut (5) is pressed against the end face of the fixing ring (2), so that the fixing ring (2) can be fixed on the stepped shaft end face of the rotor (3).

2. A large rotor and end cover fixing device according to claim 1, characterized in that: The connecting piece comprises: A connecting light hole is provided on the plate surface of the baffle (4); A screw hole is provided on the annular surface of the fixing ring (2), and the screw hole is aligned with the connecting light hole on the baffle (4); The bolt can pass through the connecting light hole and be threadedly connected to the screw hole, so as to connect and fix the baffle (4) and the fixing ring (2).

3. A large rotor and end cover fixing device according to claim 1, characterized in that: There are a plurality of baffles (4), and the plurality of baffles (4) are arranged in a ring array with the central axis of the rotor (3) as the axis.

4. A large rotor and end cover fixing device according to claim 1, characterized in that: Each of the baffles (4) is an arc-shaped plate, and the arc matches the arc of the reserved groove inside the end cover (1), so that the arc surface of the baffle (4) and the arc surface of the reserved groove fit each other.

5. A large rotor and end cover fixing device according to claim 1, characterized in that: The inner side of the fastening nut (5) is configured as a smooth section and a threaded section, the smooth section is located at the front end of the fastening nut (5) in the screwing direction, the threaded section and the shaft hub thread cooperate so that the smooth section abuts against the fixing ring (2), and the aperture of the smooth section matches the diameter of the step shaft on the shaft hub.

6. A large rotor and end cover fixing device according to claim 1, characterized in that: A soft coating is provided on the inner hole of the fixing ring (2).

7. A large rotor and end cover fixing device according to claim 6, characterized in that: The soft coating is babbitt alloy soft material.

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