Axial pushing device for rotor of centrifugal compressor

Abstract

The utility model discloses an axial pushing device for a rotor of a centrifugal compressor, and relates to the technical field of compressor accessories. Comprising a bearing frame used for placing and installing a compressor inside; and the pushing part is mounted at one end, close to the compressor rotor shaft, outside the bearing frame and used for limiting transverse movement of the rotating shaft during operation of the compressor. Power is stably transmitted to the shaft sleeve and the telescopic rod through the belt transmission set, then all parts in the correcting assembly are driven to move cooperatively, the telescopic rod in the correcting assembly is driven by the belt transmission set, thrust and limiting force on the rotor shaft are flexibly adjusted through hinged installation of the base and threaded connection design of the screw, and the correcting effect is good. And the rotor shaft is ensured to be subjected to enough pushing force and necessary transverse limiting during axial movement, so that the rotor shaft is effectively prevented from shaking and shifting in the operation process, and the overall performance and the service life of the compressor are prolonged to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of compressor auxiliary components technology, specifically to an axial drive device for a centrifugal compressor rotor. Background Technology

[0002] During the operation of a centrifugal compressor, the stability of the rotor directly affects the performance and lifespan of the entire machine. Therefore, an axial drive device is needed to limit the rotor shaft of the centrifugal compressor.

[0003] Chinese utility model patent with publication number "CN215058385U" discloses a "centrifugal compressor rotor axial driving device". This application utilizes the screw driving principle to achieve two functions: applying a stable axial force to the rotor and moving the rotor axially. It is used to assist in measuring the total clearance of the thrust bearing and checking the contact condition of the thrust bearing.

[0004] However, in actual operation, the above-mentioned device only uses a sliding block to address the offset and swaying of the rotor shaft during operation. Although this design provides axial thrust to a certain extent, in actual operation, the untreated swaying and offset will adversely affect the operating stability of the centrifugal compressor, thereby affecting the overall performance and lifespan of the compressor. Utility Model Content

[0005] The purpose of this invention is to provide an axial driving device for a centrifugal compressor rotor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The first aspect involves the design of an axial drive device for the centrifugal compressor rotor, including:

[0008] The support frame is used to house and install the compressor inside;

[0009] The pushing component is installed outside the support frame at one end near the compressor rotor shaft and is used to limit the lateral movement of the rotor shaft during compressor operation;

[0010] The actuating component includes:

[0011] A protective frame is arranged parallel to one end of the support frame near the compressor rotor shaft. Several evenly distributed sliding rods are fixed on both sides between the protective frame and the support frame. The several evenly distributed sliding rods are slidably connected to a limit frame.

[0012] A movable bushing is inserted inside the limiting frame. The bushing is snapped onto one end of the rotor shaft. A belt drive assembly is installed on the end of the bushing away from the rotor shaft. A connecting shaft for transmitting power and a straightening component acting on the rotor shaft are respectively fixed at the top and bottom of the side of the belt drive assembly away from the bushing. The straightening component acts on the rotor shaft in cooperation with the belt drive assembly and limits the lateral movement of the rotor shaft.

[0013] Furthermore, the corrective component includes:

[0014] Two telescopic rods are installed on the two sides of the bottom of the belt drive assembly. The base of one telescopic rod is hinged to the bottom of the protective frame, and a screw is fixed to the base of the other telescopic rod.

[0015] The screw is externally screwed with a threaded ring, and transmission arms are fixed at both ends of the threaded ring. Collars are fixed at the bottom of the two transmission arms respectively.

[0016] The protective frame has rods fixed to both sides of its bottom end, and the collar is compatible with the rods.

[0017] An inclined drive shaft is fixed to the top of the collar, and a limit ring is fixed to one end of the drive shaft. The limit ring is rotatably connected to the outside of the rotor shaft.

[0018] Furthermore, a buffer sleeve is installed at one end of the slide rod near the protective frame. The buffer sleeve is fitted inside the slide rod, with one end of the buffer sleeve fixed to the slide rod and the other end of the buffer sleeve sliding with the slide rod and fixed to one side of the limiting frame.

[0019] Furthermore, the belt drive assembly includes two pulleys and a belt, with the two pulleys respectively connected to the bushing and the telescopic rod, and the bushing and the telescopic rod both installed at the center point of the pulleys.

[0020] Furthermore, a stabilizing base is installed on the telescopic rod at the end furthest from the protective frame. The base of the stabilizing base and the bottom of the support frame are on the same plane, and the stabilizing base and the telescopic rod are rotatably connected.

[0021] Furthermore, a connecting rib is fixed between the bottom of the stabilizing base and the support frame, the connecting rib being used to increase the structural strength between the stabilizing base and the support frame.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] The centrifugal compressor rotor axial drive device smoothly transmits power to the bushing and telescopic rod through the belt drive assembly, thereby driving the various components in the straightening assembly to move in coordination. Driven by the belt drive assembly, the telescopic rod in the straightening assembly flexibly adjusts the thrust and limiting force on the rotor shaft through the hinged installation of its base and the screw connection design, ensuring that the rotor shaft receives sufficient thrust and necessary lateral limiting when moving axially. This effectively avoids the rotor shaft from shaking and deviating during operation, and extends the overall performance and life of the compressor to a certain extent.

[0024] Furthermore, this invention further enhances the flexibility and adaptability of the correction assembly by introducing structures such as a transmission arm, a collar, a transmission shaft, and a limiting ring. The fixed connection between the transmission arm and the collar allows the transmission shaft to swing flexibly with the movement of the telescopic rod. The rotational connection between the limiting ring and the rotor shaft enables precise guidance and restriction of the axial movement path of the rotor shaft. At the same time, the buffer sleeve effectively alleviates the direct impact between the slide rod and the limiting frame, protecting the overall structure of the device and extending its service life. Attached Figure Description

[0025] Figure 1 This is an isometric drawing of the present invention;

[0026] Figure 2 This is an isometric drawing of the pushing component of this utility model;

[0027] Figure 3 This is an isometric view of the left and right sides of the pushing component of this utility model.

[0028] In the diagram: 1. Support frame; 2. Compressor; 3. Pushing component; 301. Protective frame; 302. Telescopic rod; 303. Connecting shaft; 304. Belt drive assembly; 305. Slide rod; 306. Buffer sleeve; 307. Limiting frame; 308. Screw; 309. Bushing; 310. Limiting ring; 311. Rod body; 312. Drive shaft; 313. Collar; 314. Drive arm; 315. Threaded ring; 316. Stabilizing seat. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] When a centrifugal compressor starts and runs, the rotor shaft faces various dynamic forces while rotating at high speed, including but not limited to centrifugal force, gas pressure fluctuations, and mechanical vibrations. To ensure that the centrifugal compressor can operate stably and efficiently for a long time, the axial drive device disclosed in this application effectively addresses these challenges through the coordinated work of its ingeniously designed components.

[0031] like Figures 1 to 3 As shown, the centrifugal compressor rotor axial drive device disclosed in this application includes the following key components:

[0032] 1. The main function of the support frame 1 is to provide a stable installation environment for the compressor 2, so as to ensure that the compressor can operate smoothly.

[0033] 2. The pushing component 3 is carefully installed outside the support frame 1, close to one end of the rotor shaft of the compressor 2. Its main function is to effectively limit and prevent the lateral movement of the rotor shaft during the operation of the compressor 2, thereby ensuring the stable operation of the compressor 2.

[0034] It should be noted that the pushing component 3 is further subdivided into the following parts: a protective frame 301, which is arranged parallel to one end of the support frame 1 near the rotor shaft of the compressor 2, and is stably connected to the support frame 1 by several evenly distributed sliding rods 305. These sliding rods 305 together support and guide the sliding movement of the limiting frame 307. The limiting frame 307 has a movable bushing 309 inserted inside it. The bushing 309 is precisely snapped onto one end of the rotor shaft, and its other end is connected to the belt drive assembly 304. The top and bottom of the belt drive assembly 304 are respectively provided with a connecting shaft 303 and a straightening component. The latter, under the cooperative action of the belt drive assembly 304, performs precise straightening of the rotor shaft and effectively prevents it from moving laterally.

[0035] In addition, refer to Figure 2 and Figure 3 As can be seen, in this application, the specific composition of the correction component includes: two telescopic rods 302, which are respectively installed on both sides of the bottom of the belt drive assembly 304. The base of one telescopic rod 302 is connected to the bottom of the protective frame 301 by a hinge, while the base of the other telescopic rod 302 is fixed with a screw 308. A threaded ring 315 is screwed onto the screw 308. A transmission arm 314 is fixed to both ends of the threaded ring 315, and a collar 313 is fixed to the bottom of the transmission arm 314. These collars 313 are adapted to the rods 311 fixed to both sides of the bottom of one end of the protective frame 301. It should be added that an inclined transmission shaft 312 is fixed to the top of the collar 313. A limit ring 310 is fixed to one end of the transmission shaft 312. The limit ring 310 is installed on the outside of the rotor shaft by a rotatable connection, thereby achieving precise positioning of the rotor shaft.

[0036] When the belt drive assembly 304 rotates, causing the screw 308 to rotate, the threaded ring 315 moves and pushes the limit ring 310 to complete the limit of the rotor shaft.

[0037] It should also be noted that, in order to enhance the buffering performance of the device, a buffer sleeve 306 is also installed at one end of the slide rod 305 near the protective frame 301. The buffer sleeve 306 is fitted inside the slide rod 305, with one end fixedly connected to the slide rod 305 and the other end slidably connected to the slide rod 305 and fixed to one side of the limit frame 307.

[0038] It should also be noted that the belt drive assembly 304 consists of two pulleys and a belt. The two pulleys are connected to the bushing 309 and the telescopic rod 302 respectively, and are both located at the center point of the pulleys.

[0039] It should also be noted that, to further enhance the stability of the device, a stabilizing base 316 is installed on the outside of the telescopic rod 302 at the end away from the protective frame 301. The base of the stabilizing base 316 is coplanar with the bottom of the support frame 1 and is connected to the telescopic rod 302 by a rotatable connection. In addition, a connecting rib is fixed between the stabilizing base 316 and the bottom of the support frame 1 to further increase the structural strength between the two.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A axial driving device for a centrifugal compressor rotor, characterized in that, include: The support frame (1) is used to house and install the compressor (2) inside. The pusher (3) is installed outside the support frame (1) at one end near the rotor shaft of the compressor (2) to limit the lateral movement of the rotor shaft when the compressor (2) is running; The pushing component (3) includes: The protective frame (301) is arranged in parallel at one end of the support frame (1) near the rotor shaft of the compressor (2). Several evenly distributed slide rods (305) are fixed on both sides between the protective frame (301) and the support frame (1). The several evenly distributed slide rods (305) are slidably connected to the limit frame (307). A movable bushing (309) is inserted inside the limiting frame (307). The bushing (309) is snapped onto one end of the rotor shaft. A belt drive assembly (304) is installed on the end of the bushing (309) away from the rotor shaft. A connecting shaft (303) for transmitting power and a straightening assembly acting on the rotor shaft are respectively fixed on the top and bottom of the side of the belt drive assembly (304) away from the bushing (309). The straightening assembly acts on the rotor shaft in cooperation with the belt drive assembly (304) and limits the lateral movement of the rotor shaft.

2. The centrifugal compressor rotor axial driving device according to claim 1, characterized in that: The corrective components include: Two telescopic rods (302) are installed on the two sides of the bottom of the belt drive assembly (304). The base of one telescopic rod (302) is hinged to the bottom of the protective frame (301), and a screw (308) is fixed at the base of the other telescopic rod (302). The screw (308) is externally screwed with a threaded ring (315), and transmission arms (314) are fixed at both ends of the threaded ring (315). Collars (313) are fixed at the bottom of the two transmission arms (314). The protective frame (301) has rods (311) fixed on both sides of the bottom of one end, and the collar (313) is compatible with the rods (311); An inclined drive shaft (312) is fixed to the top of the collar (313), and a limit ring (310) is fixed to one end of the drive shaft (312). The limit ring (310) is rotatably connected to the outside of the rotor shaft.

3. The centrifugal compressor rotor axial driving device according to claim 1, characterized in that: A buffer sleeve (306) is installed at one end of the slide rod (305) near the protective frame (301). The buffer sleeve (306) is fitted inside the slide rod (305), and one end of the buffer sleeve (306) is fixed to the slide rod (305). The other end of the buffer sleeve (306) slides with the slide rod (305) and is fixed to one side of the limiting frame (307).

4. The centrifugal compressor rotor axial driving device according to claim 1, characterized in that: The belt drive assembly (304) includes two pulleys and a belt. The two pulleys are respectively connected to the bushing (309) and the telescopic rod (302), and the bushing (309) and the telescopic rod (302) are both installed at the center point of the pulleys.

5. The centrifugal compressor rotor axial driving device according to claim 2, characterized in that: A stabilizing base (316) is installed on the telescopic rod (302) at the end away from the protective frame (301). The base of the stabilizing base (316) and the bottom of the support frame (1) are on the same plane, and the stabilizing base (316) and the telescopic rod (302) are rotatably connected.

6. The centrifugal compressor rotor axial driving device according to claim 5, characterized in that: A connecting rib is fixed between the bottom of the stabilizing base (316) and the bearing frame (1), and the connecting rib is used to increase the structural strength between the stabilizing base (316) and the bearing frame (1).

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