A vertical motor protection device
By using a fixed frame and screw connection in the vertical motor, the force separation between the rotor and the thrust bearing is achieved, solving the problem of thrust bearing damage during transportation and realizing effective protection of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SEC ELECTRIC MACHINERY
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-10
AI Technical Summary
During transportation, vertical motors are prone to damage to their thrust bearings due to bumps and collisions, which can lead to problems such as abnormal bearing noise or excessive temperature.
A fixed frame is used as the lifting component. The fixed frame, the ring and the retaining ring are connected by screws to separate the force of the rotor from the thrust bearing. The motor's own protective cover is used as the fixed frame, avoiding the need for additional parts and making the operation simple.
It effectively protects the rotor and thrust bearing, preventing damage during transportation. It is suitable for large vertical motors, has a simple structure, is easy to operate, and has a wide range of applications.
Smart Images
Figure CN224481556U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of vertical motor safety transportation protection technology, specifically involving the protection of motors with large rotor weight and large-sized thrust bearings during overall transportation. Background Technology
[0002] Traditional vertical motors, when subjected to large axial forces, typically employ a sliding bearing structure. This structure results in a generally large and heavy motor. Using thrust bearings allows for a smaller motor size, facilitating overall transport and installation. Thrust bearings are single-row, self-aligning roller bearings. They consist of a shaft ring, a housing ring, and asymmetrical drum-shaped rollers with a cage. The cage holds the rollers, cage assembly, and shaft ring together. The outer ring is separable, allowing for independent installation of both inner and outer rings. Thrust bearings can withstand very high axial forces. Because the raceway is inclined relative to the bearing axis, the bearing can also withstand radial forces. Therefore, these bearings are particularly suitable for use in vertical motors subjected to large axial forces, and are applicable to loads such as water pumps and centrifuges. In actual transportation, vertically mounted motors are quite heavy; the rotor alone can weigh around ten tons. The rotor weight is borne by the upper thrust self-aligning roller bearing. During transport, bumps and knocks are inevitable, potentially causing unpredictable damage to the rollers. This can lead to abnormal bearing noise or overheating during motor operation. Therefore, it is necessary to take necessary protective measures for the bearings during transportation. Utility Model Content
[0003] The purpose of this invention is to solve the protection problem of key components of vertical motors, such as rotor shafts and thrust bearings, especially the damage caused by bumps and collisions during transportation and hoisting.
[0004] To achieve the above objectives, the following technical solution is provided:
[0005] A vertical motor protection device includes: a frame, a rotor located inside the frame, a rotor shaft, and a thrust bearing. A fixed frame is provided on the upper part of the frame. A retaining ring and a thrust head are installed at one end of the rotor shaft near the fixed frame. A cavity is provided between the retaining ring and the fixed frame for installing a ring. A lifting member is installed on the fixed frame. The lifting member passes through the fixed frame, the ring, the retaining ring, and the thrust head and locks them.
[0006] Furthermore: the lifting component is a screw, and several of the screws are evenly distributed axially around the rotor shaft.
[0007] Furthermore: the fixing frame, the ring, and the retaining ring are each provided with through holes, and the thrust head is provided with threaded holes. The screws pass through the through holes on the fixing frame, the ring, and the retaining ring, and are connected to and locked with the threaded holes on the thrust head.
[0008] Further: After the ring is installed in the cavity, there is a 2-5mm gap between the ring and the retaining ring. After adjusting and locking the lifting member, the gap can be reduced to 0mm.
[0009] Further: When the gap between the ring and the retaining ring is 0mm, the rotor moves upward by 2-5mm.
[0010] Furthermore: The thrust bearing includes an inner ring, an outer ring, and rollers. When the gap between the ring and the retaining ring is 0mm, the inner ring rollers of the thrust bearing do not contact the outer ring, and the inner and outer rings of the thrust bearing are not subjected to force.
[0011] Further: The fixing frame includes an end cap, which is made of steel plate with a thickness of not less than 40mm.
[0012] Further: The fixing frame includes reinforcing ribs, which are made of steel plates with a thickness of not less than 30mm.
[0013] Further: Includes a rubber plate disposed at the gap between the fixing frame, the ring, and the rotor shaft, for protecting the rotor shaft.
[0014] Furthermore, the mounting bracket can be used as a motor protective cover, and also as a grounding carbon brush bracket.
[0015] The beneficial effects of this utility model are as follows: by using the motor's own protective cover and other structures as a fixing frame, and setting lifting components on the fixing frame, the rotor can be lifted, thereby separating the forces on the rotor, thrust bearing, and other structures. The structure is simple, using the motor's own protective cover as a fixing frame, and no additional parts are required. Operation is convenient; simply tightening the screws can lift the rotor and separate the forces inside the bearing, preventing damage to important components such as the motor rotor. It has a wide range of applications and can accommodate larger loads. Attached Figure Description
[0016] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings:
[0017] Figure 1 This is an assembly diagram of the vertical motor protection device of this application.
[0018] Figure 2 This is a partial schematic diagram of the vertical motor protection device of this application in an unprotected state.
[0019] Figure 3 This is a partial schematic diagram of the vertical motor protection device of this application in the protected state. Detailed Implementation
[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0021] In this specification, identical parts are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "multiple" means two or more.
[0022] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0023] Figure 1 This application illustrates a vertical motor protection device provided in an exemplary embodiment. The vertical motor has a frame on its exterior, and a mounting bracket 1 is installed on the upper part of the frame as a load-bearing support. The mounting bracket 1 can also be used as a motor protective cover or for installing a vibration measuring bracket or a grounding carbon brush bracket. By utilizing the structure of the motor itself, no additional parts are required, which simplifies the structure of the vertical motor protection device.
[0024] Figure 2 This illustration shows a partial schematic diagram of a vertical motor protection device provided in an exemplary embodiment of this application, in its unprotected state. The motor contains a rotor, a rotor shaft, and a thrust bearing. A retaining ring 2 and a thrust head 3 are sequentially installed at the end of the rotor shaft near the fixed frame 1. When the motor is in the unprotected state, there is a gap between the retaining ring 2 and the fixed frame 1, creating a cavity between them. The motor can then operate normally.
[0025] Figure 3 This illustration shows a partial schematic diagram of a vertical motor protection device provided in an exemplary embodiment of this application, in a protected state. When the motor needs to be transported or hoisted, it is necessary to protect the motor to prevent damage caused by bumps and vibrations during the movement. At this time, a ring 4 is installed in the cavity between the retaining ring 2 and the fixing frame 1. After the ring 4 is installed, there is still a 2-5mm gap in the axial direction of the entire cavity.
[0026] The fixed frame 1, ring 4, and retaining ring 2 are all provided with through holes, and the thrust head 3 is provided with a threaded hole. The lifting component 5 passes through the through holes of the fixed frame 1, ring 4, and retaining ring 2 in sequence, and connects with the threaded hole of the thrust head 3. When the lifting component 5 is turned, the fixed frame 1, ring 4, retaining ring 2, and thrust head 3 can be locked together. At this time, the axial clearance in the cavity is eliminated, reduced from 2-5mm to 0mm. Since the retaining ring 2 and the thrust head 3 are mounted on the rotor shaft, when the clearance between the ring 4 and the retaining ring 2 is reduced from 2-5mm to 0mm, the rotor is lifted a corresponding distance. The inner ring rollers of the thrust bearing do not contact the outer ring, and the inner and outer rings of the thrust bearing are not subjected to force. Because the parts are separated and not subjected to force, damage caused by collisions and vibrations is reduced, protecting important components of the motor. A rubber plate can also be placed at the gap between the fixed frame 1, ring 4, and the rotor shaft to further protect the rotor shaft.
[0027] Motors come in various specifications, with some large vertical motors being quite heavy, their rotors weighing up to ten tons. This necessitates that the mounting bracket 1 and lifting component 5 be adaptable to different load-bearing capacities. In one possible embodiment, the mounting bracket 1 includes an end cap made of 40mm thick steel plate. To further increase the load-bearing capacity of the mounting bracket 1, reinforcing ribs 6 made of 30mm thick steel plate are also provided. The lifting component 5 uses at least four M36*160 hexagonal head screws, evenly distributed axially around the rotor shaft. These M36*160 hexagonal head screws pass sequentially through the through holes of the mounting bracket 1, the ring 4, and the retaining ring 2, and connect to the threaded hole of the thrust head 3. When the screws are tightened to lock the cavity clearance to 0mm, the rotor is lifted a corresponding distance. According to the mechanical design manual, the rated load-bearing capacity of the four M36*160 hexagonal head screws is sufficient to lift and fix a rotor weighing approximately ten tons. In another possible embodiment, the steel plate of the fixing frame 1 can be selected with different thicknesses depending on the load-bearing capacity required for lifting and fixing, and different specifications and quantities of screws can be selected according to the mechanical design manual.
[0028] The operating steps of the vertical motor protection device of this application are as follows: When transporting or moving the motor, install the ring 4 in the cavity between the retaining ring 2 and the fixing frame 1. Select screws of the corresponding specifications and quantity, and pass the screws sequentially through the through holes of the fixing frame 1, the ring 4, and the retaining ring 2, and connect them to the threaded hole of the thrust head 3. Tighten the screws to lock until the cavity gap is zero. Then, place a rubber plate at the gap between the fixing frame 1, the ring 4, and the rotor shaft. In one embodiment, if manually tightening the screws is too strenuous, an auxiliary manual tool can be used for tightening, or a lifting device such as a hydraulic jack can be used to lift the rotor to a preset height so that the cavity gap is zero before tightening the screws to lock. When the motor needs to run, unlock the screws, remove the screws, the ring 4, and the rubber plate, and the motor can run normally.
[0029] In the embodiments disclosed in this application, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.
[0030] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.
Claims
1. A vertical motor protection device, characterized in that, include: The machine includes a frame, a rotor located inside the frame, a rotor shaft, and a thrust bearing. A fixed frame is provided on the upper part of the frame. A retaining ring and a thrust head are installed at one end of the rotor shaft near the fixed frame. A cavity is provided between the retaining ring and the fixed frame for installing a ring. A lifting component is installed on the fixed frame. The lifting component passes through the fixed frame, the ring, the retaining ring, and the thrust head and locks them in place.
2. The vertical motor protection device as described in claim 1, characterized in that: The lifting component is a screw, and several of the screws are evenly distributed axially around the rotor shaft.
3. The vertical motor protection device as described in claim 2, characterized in that: The fixing frame, the circular ring, and the retaining ring are each provided with through holes, and the thrust head is provided with threaded holes. The screws pass through the through holes on the fixing frame, the circular ring, and the retaining ring, and are connected to and locked with the threaded holes on the thrust head.
4. The vertical motor protection device as described in claim 1, characterized in that: After the ring is installed in the cavity, there is a 2-5mm gap between the ring and the retaining ring. After adjusting and locking the lifting member, the gap can be reduced to 0mm.
5. The vertical motor protection device as described in claim 4, characterized in that: When the gap between the ring and the retaining ring is 0mm, the rotor moves upward by 2-5mm.
6. The vertical motor protection device as described in claim 4, characterized in that: The thrust bearing includes an inner ring, an outer ring, and rollers. When the gap between the ring and the retaining ring is 0mm, the inner ring rollers of the thrust bearing do not contact the outer ring, and the inner and outer rings of the thrust bearing are not subjected to force.
7. The vertical motor protection device as described in claim 1, characterized in that: The fixing frame includes an end cap, which is made of steel plate with a thickness of not less than 40mm.
8. The vertical motor protection device as described in claim 7, characterized in that: The fixing frame includes reinforcing ribs, which are made of steel plates with a thickness of not less than 30mm.
9. The vertical motor protection device as described in claim 1, characterized in that: It includes a rubber plate, which is disposed at the gap between the fixing frame, the ring and the rotor shaft, and is used to protect the rotor shaft.
10. The vertical motor protection device as described in claim 1, characterized in that: The mounting bracket can be used as a motor protective cover, and also as a grounding carbon brush bracket.