PEEK shaft sleeve for isolating shaft current
By using PEEK sleeves between the shaft and the bearing and combining interference fit and glue, the problems of high costs and frequent maintenance in the prior art are solved, and low-cost and effective shaft current isolation and bearing protection are achieved, ensuring the stability and insulation of the motor in high temperature and high humidity environments.
Patent Information
- Application Number
- CN202422762544.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-11-13
AI Technical Summary
In the prior art, the method of isolating shaft current is high cost and requires regular maintenance, and has low reliability. The bearings are susceptible to electrical corrosion. The existing products cannot effectively solve the motor life problem caused by shaft current.
The PEEK shaft sleeve is adopted. By setting the PEEK shaft sleeve between the shaft and the bearing, and using the interference fit relationship and the glue in the glue groove to ensure a close cooperation, a stable connection between the shaft and the bearing is achieved and current flow is prevented.
It realizes low-cost, no regular maintenance, shaft current isolation, prevents electric corrosion of the bearing, ensures the stability and insulation of the system in high temperature and high humidity environments, and extends the motor life.
Smart Images
Figure CN223227717U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PEEK shaft sleeves, in particular to a PEEK shaft sleeve for isolating shaft current. Background Art
[0002] As the application of inverter-driven motors becomes more and more widespread, the problem of motor life caused by shaft current is becoming more and more prominent. More and more bearings are experiencing electrical corrosion, which affects the bearing life. Currently, there are many studies on isolating shaft current. The commonly used effective ways to isolate shaft current are insulated bearings and ceramic bearings, but this method is too expensive. Secondly, brushes are used for conduction. Although brushes can conduct electricity, they are expensive and easy to wear. They need to be replaced regularly, and the subsequent maintenance cost is high. Alternatively, special conductive brushes are used for conduction, but special conductive brushes are expensive and need to be replaced regularly, and the subsequent maintenance cost is high. Therefore, most of the existing products suitable for isolating shaft current are expensive and require regular maintenance. At the same time, they have low reliability and poor shaft current isolation effect. Utility Model Content
[0003] (1) Technical problems solved
[0004] In view of the deficiencies in the prior art, the present invention provides a PEEK sleeve for isolating shaft current, which solves the problems raised in the above background technology.
[0005] (2) Technical solution
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a PEEK sleeve for isolating shaft current, comprising a shaft, a PEEK sleeve being sleeved on the right side of the outer surface of the shaft, a glue groove being provided on the right side of the outer surface of the PEEK sleeve, a platform being provided on the inner wall of the PEEK sleeve, a bearing being sleeved on the outer surface of the PEEK sleeve, and the PEEK sleeve being located between the shaft and the bearing.
[0007] Preferably, the PEEK sleeve is made of PEEK material, and the PEEK sleeve is added between the shaft and the bearing.
[0008] Preferably, the PEEK sleeve and the shaft are in an interference fit relationship, and the PEEK sleeve and the shaft are provided with platform features.
[0009] Preferably, the PEEK sleeve and the bearing are in an interference fit relationship, and a glue groove is left on the outer surface of the PEEK sleeve.
[0010] Preferably, the end face of the PEEK sleeve contacts the end face of the bearing inner ring.
[0011] (3) Beneficial effects
[0012] Compared with the prior art, the present invention provides a PEEK sleeve for isolating shaft current, which has the following beneficial effects:
[0013] 1. The PEEK sleeve for isolating shaft current is easy to install by only providing one set of PEEK sleeves, and does not affect other components. It is a simple and feasible solution that can effectively isolate shaft current and prevent electrical corrosion of bearings. It is low-cost and does not require regular maintenance. At the same time, the PEEK sleeve is made of PEEK material, which has high mechanical properties. Compared with other plastic materials, it has higher mechanical rigidity, high temperature resistance, corrosion resistance, and a thermal expansion coefficient close to that of metal. It is less affected by humidity, so it can provide stable dimensions in a wide temperature and high humidity environment, and can ensure a stable fit with the bearing and shaft, thereby ensuring system stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 This is a vertical cross-sectional diagram of the overall structure of the utility model;
[0016] Figure 3 This is a right side view of the overall structure of the utility model;
[0017] Figure 4 It is a schematic diagram of the local structure of the utility model.
[0018] In the figure: 1. Shaft; 2. PEEK bushing; 3. Rubber groove; 4. Platform; 5. Bearing. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0020] See also Figure 1-4The utility model provides a technical solution: a PEEK sleeve for isolating shaft current, comprising a shaft 1, a PEEK sleeve 2 being sleeved on the right side of the outer surface of the shaft 1, a glue groove 3 being provided on the right side of the outer surface of the PEEK sleeve 2, and the PEEK sleeve 2 need not have a glue groove 3 on its surface during actual production and use, and no glue needs to be added, a platform 4 being provided on the inner wall of the PEEK sleeve 2, and the platform 4 can be determined according to actual conditions, and the platform 4 can be replaced with other structures, and its size and shape can also be changed, a bearing 5 being sleeved on the outer surface of the PEEK sleeve 2, and the PEEK sleeve 2 being located between the shaft 1 and the bearing 5.
[0021] By setting up only one set of PEEK bushings 2, it is easy to install and has no impact on other components. It is a simple and feasible solution that can effectively isolate the current of the shaft 1 and prevent electrical corrosion of the bearing 5. It is low cost and does not require regular maintenance. At the same time, the PEEK bushings 2 are made of PEEK material. PEEK material has high mechanical properties. Compared with other plastic materials, it has higher mechanical rigidity, high temperature resistance, corrosion resistance, and has a thermal expansion coefficient close to that of metal. It is less affected by humidity, so it can provide stable dimensions in a wide temperature and high humidity environment, and can ensure a stable matching relationship with the bearing 5 and the shaft 1, thereby ensuring system stability.
[0022] The sizes and shapes of all components in this structure are not specifically limited here and need to be produced according to actual conditions.
[0023] In order to ensure that the motor maintains good insulation in addition to dimensional stability under high temperature and high humidity conditions, the present invention sets the PEEK sleeve 2 to be made of PEEK material. PEEK material has excellent electrical properties, ensuring that the motor maintains good insulation in addition to dimensional stability under high temperature and high humidity conditions. The PEEK sleeve 2 is added between the shaft 1 and the bearing 5. The PEEK sleeve 2 plays an insulating role, effectively and reliably isolating the current from the shaft 1 through the bearing 5, preventing the bearing 5 from generating electrical corrosion, and extending the life of the motor.
[0024] In order to prevent relative rotation between the shaft 1 and the PEEK sleeve 2, the utility model sets an interference fit relationship between the PEEK sleeve 2 and the shaft 1. Therefore, relative rotation between the shaft 1 and the PEEK sleeve 2 can be effectively prevented. The PEEK sleeve 2 and the shaft 1 are provided with a platform 4 feature. The setting of the platform 4 can prevent relative rotation between the shaft 1 and the PEEK sleeve 2 when the temperature changes greatly.
[0025] In order to prevent relative rotation between the bearing 5 and the PEEK sleeve 2, the present invention sets an interference fit relationship between the PEEK sleeve 2 and the bearing 5. This relationship can prevent relative rotation between the bearing 5 and the PEEK sleeve 2. A glue groove 3 is left on the outer surface of the PEEK sleeve 2. Glue is added to the glue groove 3 to doubly ensure that the bearing 5 and the PEEK sleeve 2 fit tightly and do not rotate relative to each other.
[0026] In order to prevent current from flowing from the shaft 1 to the bearing 5, the utility model sets the end face of the PEEK sleeve 2 to contact the end face of the inner ring of the bearing 5, which can prevent the shaft 1 from contacting the bearing 5 and effectively prevent current from flowing from the shaft 1 to the bearing 5.
[0027] During use, the staff first puts the PEEK sleeve 2 on the shaft 1. There is an interference fit relationship between the PEEK sleeve 2 and the shaft 1. At the same time, a platform feature is provided between the PEEK sleeve 2 and the shaft 1 to prevent large temperature changes and relative rotation between the PEEK sleeve 2 and the shaft 1. Then glue is added to the inside of the glue groove 3, and then the bearing 5 is put on the surface of the PEEK sleeve 2. At the same time, there is an interference fit relationship between the PEEK sleeve 2 and the bearing 5. At the same time, because the glue is added to the inside of the glue groove 3, it can be doubly guaranteed that the bearing 5 and the PEEK sleeve 2 are tightly fitted and there is no relative rotation. At this point, the PEEK sleeve 2 is installed between the shaft 1 and the bearing 5. The PEEK sleeve 2 plays an insulating role, effectively and reliably isolating the current from the shaft 1 through the bearing 5, preventing the bearing 5 from generating electrical corrosion and extending the life of the motor.
[0028] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A PEEK sleeve for isolating shaft current, comprising a shaft (1), characterized in that: A PEEK sleeve (2) is sleeved on the right side of the outer surface of the shaft (1), a glue groove (3) is provided on the right side of the outer surface of the PEEK sleeve (2), a platform (4) is provided on the inner wall of the PEEK sleeve (2), a bearing (5) is sleeved on the outer surface of the PEEK sleeve (2), and the PEEK sleeve (2) is located between the shaft (1) and the bearing (5).
2. A PEEK sleeve for isolating shaft current according to claim 1, characterized in that: The PEEK sleeve (2) is made of PEEK material, and the PEEK sleeve (2) is added between the shaft (1) and the bearing (5).
3. The PEEK sleeve for isolating shaft current according to claim 1, characterized in that: The PEEK sleeve (2) and the shaft (1) are in an interference fit relationship, and the PEEK sleeve (2) and the shaft (1) are provided with a platform (4) feature.
4. The PEEK sleeve for isolating shaft current according to claim 1, characterized in that: The PEEK sleeve (2) and the bearing (5) are in an interference fit relationship, and a glue groove (3) is left on the outer surface of the PEEK sleeve (2).
5. The PEEK sleeve for isolating shaft current according to claim 1, characterized in that: The end face of the PEEK sleeve (2) contacts the end face of the inner ring of the bearing (5).