Sliding bearing and rolling bearing combined bearing body
By adding rolling bearings to the outer wall of the pump shaft of the water supply pump and setting an oil-shrinking ring in the bearing cover, the problem of serious wear of the traditional balance mechanism under frequent start and stop work is solved, and the effect of axial centering and the extension of bearing life are achieved.
Patent Information
- Application Number
- CN202421326492.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The traditional balance mechanism is difficult to meet the requirements when the feed pump is frequently started and stopped, resulting in rapid wear and scrapping.
A bearing body is designed that combines sliding bearings and rolling bearings. By adding rolling bearings to the outer wall of the pump shaft and setting an oil-shrinking ring in the cavity of the bearing cover, effective lubrication and balance of sliding bearings and rolling bearings are achieved.
Under the start, stop and any working conditions of the water supply pump, the device can effectively balance the axial centering, extend the service life of the bearing, and is suitable for frequent start and stop working conditions.
Smart Images
Figure CN222650194U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluid mechanical pumps, in particular to a bearing body composed of a sliding bearing and a rolling bearing. Background Art
[0002] During the operation of the centrifugal pump, sliding bearings are required at both ends to support the rotation of the entire rotor component. However, sliding bearings cannot balance the axial thrust generated by the water pump during operation. Under normal working conditions, this axial thrust is adjusted by the balancing mechanism in the pump. The balancing mechanism consists of a static plate and a dynamic plate, with a certain amount of gap between them. However, in some emerging industries and fields, the frequency of starting and stopping the water pump is increasingly required. This traditional balancing mechanism is difficult to meet the requirements and will quickly wear out and become scrapped. For example: in a water plant, due to the large difference in water supply between day and night, some water pumps need to be started and stopped every day. Another example is a solar thermal power plant. During the day, there is sufficient sunlight, the molten salt generates a large amount of heat, and the water pump has sufficient water supply. At night, there is no light, and the water pump basically does not operate. The water pump is also required to start and stop every day, which has a great impact on the balancing mechanism and urgently needs to be improved in structure. Utility Model Content
[0003] In view of the above problems, the utility model provides a bearing body composed of a sliding bearing and a rolling bearing; the bearing body has the effect of ensuring the axial centering of the water pump when starting, stopping and under any working conditions.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bearing body composed of a sliding bearing and a rolling bearing, comprising a bearing cover, a cavity is provided inside the bearing cover, a pump shaft rotatably connected to the bearing cover is provided in the cavity, a sliding bearing is provided on the outer wall of the pump shaft, the sliding bearing is rotatably connected to the cavity of the bearing cover, an oil slinger is provided on the right end of the sliding bearing, a rolling bearing is provided on the right end of the oil slinger, the rolling bearing is rotatably connected to the pump shaft, a bearing end cover is provided on the outer wall of the rolling bearing, the rolling bearing is fixedly connected to the bearing cover through the bearing end cover, an adjusting nut is provided on the right end of the rolling bearing, a test gear is fixedly connected to the right end of the pump shaft, a refueling cap is fixedly connected to the upper end of the pump shaft, a test gear is fixedly connected to the right end of the pump shaft, and a bearing seat is fixedly connected to the bearing cover at the lower end of the pump shaft.
[0005] Preferably, the gap between the right end face of the rolling bearing and the bearing end cover is in the range of 0.3 to 0.5 mm.
[0006] Preferably, the gap between the left end surface of the test gear and the bearing end cover is 5 mm.
[0007] Preferably, the sliding bearing is a double ball bearing, and the upper end of the bearing cover is symmetrically provided with oil filling holes, and the oil filling holes are directly opposite to the balls of the sliding bearing.
[0008] Preferably, a protective cover fixedly connected to the bearing cover is provided on the outer side of the test gear, and a hole perpendicular to the test gear is opened at the upper end of the protective cover.
[0009] Preferably, the bearing cap and the bearing seat are integrally formed by casting.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0011] 1. By adding rolling bearings and fixing them on the outer wall of the pump shaft, the rolling elements are prevented from influencing each other during rolling. This requires the cage to limit each rolling element to a reasonable spacing to ensure that the rolling element can move smoothly and improve the axial centering effect of the water pump under starting, stopping and any working conditions.
[0012] 2. By setting an oil-slinging ring in the cavity of the bearing cover, the oil-slinging ring will fill the oil cavity with lubricating oil and effectively lubricate the sliding bearing and rolling bearing at the same time. The balancing plate and balancing sleeve of the water pump can balance 90% of the axial force, and the remaining 10% of the axial force is balanced by the rolling bearing. Since the rolling bearing has the advantages of fast response and high stability, the device is very suitable for use in working environments with frequent start and stop. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is an overall cross-sectional schematic diagram of the utility model.
[0014] Notes in the figure: 1. Pump shaft; 2. Bearing cover; 3. Oil filling cap; 4. Sliding bearing; 5. Oil slinger; 6. Bearing end cover; 7. Rolling bearing; 8. Adjusting nut; 9. Test gear; 10. Bearing seat. DETAILED DESCRIPTION
[0015] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0016] See also Figure 1A bearing body composed of a sliding bearing and a rolling bearing, comprising a bearing cover 2, wherein a cavity is provided inside the bearing cover 2, wherein the cavity is used for daily lubricating oil, thereby ensuring the lubrication of a pump shaft 1, a sliding bearing 4 and a rolling bearing 7 inside the bearing cover 2, reducing the friction during their rotation, and extending the service life of the sliding bearing 4 and the rolling bearing 7, wherein a pump shaft 1 rotatably connected to the bearing cover 2 is provided in the cavity, wherein a sealing ring is provided at the connection between the bearing cover 2 and the pump shaft 1, for preventing the lubricating oil in the cavity inside the bearing cover 2 from flowing out, and preventing dust particles from the outside from entering the cavity of the bearing cover 2, thereby increasing the friction between the sliding bearing 4 and the rolling bearing 7, and shortening the service life of the sliding bearing 4 and the rolling bearing 7, wherein the pump The outer wall of the shaft 1 is provided with a sliding bearing 4, and the sliding bearing 4 is a double ball bearing. The sliding bearing 4 is rotatably connected to the cavity of the bearing cover 2. During the operation of the centrifugal pump, the two ends of the pump shaft 1 need sliding bearings 4 to support the rotation of the entire rotor component. The right end of the sliding bearing 4 is provided with an oil slinger 5 fixedly connected to the pump shaft 1, and the right end of the oil slinger 5 is provided with a rolling bearing 7. The oil slinger 5 fills the oil cavity with lubricating oil and effectively lubricates the sliding bearing 4 and the rolling bearing 7 at the same time. The balancing plate and balancing sleeve of the water pump can balance 90% of the axial force, and the remaining 10% of the axial force is balanced by the rolling bearing 7. Since the rolling bearing 7 has the advantages of fast response and high stability, the device is very suitable for high-frequency It is used in working conditions with frequent starts and stops. The rolling bearing 7 is rotatably connected to the pump shaft 1. The outer wall of the rolling bearing 7 is provided with a bearing end cover 6. The gap between the right end face of the rolling bearing 7 and the bearing end cover 6 is in the range of 0.3 to 0.5 mm. The rolling bearing 7 is fixedly connected to the bearing cover 2 through the bearing end cover 6. The right end of the rolling bearing 7 is provided with an adjusting nut 8. The adjusting nut 8 is used to adjust the rolling bearing 7 so that the pump shaft 1 can rotate more smoothly when rotating. The right end of the pump shaft 1 is fixedly connected with a test gear 9. The gap between the left end face of the test gear 9 and the bearing end cover 6 is 5 mm. The upper end of the pump shaft 1 is fixedly connected with a refueling cap 3. The refueling cap 3 A sealing ring is arranged at the connection with the bearing cover 2 to ensure the sealing of the bearing cover 2. The oil filling cap 3 is used for sealing to effectively prevent the lubricating oil in the bearing cover 2 from overflowing. The upper end of the bearing cover 2 is symmetrically provided with oil filling holes, and the oil filling holes are opposite to the ball of the sliding bearing 4. By placing the oil filling holes opposite to the ball of the sliding bearing 4, the lubricating oil can be directly poured on the sliding bearing 4 without filling the cavity of the bearing cover 2 with the lubricating oil. The right end of the pump shaft 1 is fixedly connected with a test gear 9, and the lower end of the pump shaft 1 is provided with a bearing seat 10 fixedly connected to the bearing cover 2. The bearing cover 2 and the bearing seat 10 are integrally formed by casting to ensure the firmness of the connection between the bearing cover 2 and the bearing seat 10 and prevent breakage.
[0017] See also Figure 1The outer side of the test gear 9 is provided with a protective cover fixedly connected to the bearing cover 2, and the upper end of the protective cover is provided with a hole perpendicular to the test gear 9, and the hole is used to install a speed sensor. The test sensor is an existing device and will not be described in detail here. The speed sensor is connected to the bearing vibration online monitoring system to monitor the use of the water pump bearing in real time. The whole system is composed of sensors, transmitters, collectors, repeaters, and receiving and analyzing terminals. Among them, the vibration condition of the bearing during operation is mainly monitored in real time by the sensor, and the sensor can also convert the acquired vibration signal into an electrical signal that is easy to transmit, which lays a good foundation for the accurate transmission of vibration data; the acceleration signal formed during the bearing vibration process is mainly responsible for the corresponding A / D conversion and FFT transformation by the transmitter, through Through the operating signals monitored by the transmitter, the background technicians can timely understand the key parameters such as speed, displacement and quality factor during the operation of the bearing, so as to fully grasp the overall operation of the bearing and provide reliable protection for the normal operation of the bearing; the collector is mainly used to send the received signals to the data receiver or repeater. The addition of repeaters is mainly to meet the needs of data transmission in a wider range, ensure the stability of data transmission, and avoid the loss of important data; the monitoring host can identify the problems by conducting a systematic and comprehensive comparative analysis of the received bearing operation data. For the data that exceeds the system-set threshold, the host will take early warning measures such as sound and light and text messages to promptly feedback the results to the background technicians. The technicians can take effective countermeasures based on their monitoring data to avoid the occurrence of bearing accidents.
[0018] When the utility model is installed and used:
[0019] During installation, the sliding bearing 4, the oil slinger 5, the rolling bearing 7 and the test gear 9 are fixed to the outer wall of the pump shaft 1 in sequence, the bearing end cover 6 is installed on the bearing cover 2, and the pump shaft 1 with the sliding bearing 4, the oil slinger 5, the rolling bearing 7 and the test gear 9 installed is correspondingly installed between the two bearing covers 2, so that the sliding bearing 4 is in the cavity of the bearing cover 2, the protective cover is fixed on the bearing cover 2, and the test gear 9 is covered therein, the speed sensor is fixed on the protective cover, and connected to the bearing vibration online monitoring system of the prior art, and lubricating oil is injected into the cavity of the bearing cover 2 through the oil filling hole on the bearing cover 2. After completion, the bearing cover 2 is fixed on the bearing cover 2.
[0020] When in use, the oil-slinging ring 5 throws the lubricating oil in the cavity of the bearing cover 2 onto the sliding bearing 4 and the rolling bearing 7 to reduce friction. At the same time, the balancing plate and balancing sleeve of the water pump can balance 90% of the axial force, and the remaining 10% of the axial force is balanced by the rolling bearing 7. Since the rolling bearing 7 has the advantages of fast response and high stability, the device is very suitable for use in working conditions with frequent start and stop. Bearing vibration online monitoring system: real-time monitoring of the use of water pump bearings. The whole system consists of sensors, transmitters, collectors, repeaters, and receiving and analysis terminals. Among them, the vibration of the bearing during operation is mainly monitored in real time by the sensor, and the sensor can also convert the acquired vibration signal into an electrical signal that is easy to transmit, which lays a good foundation for the accurate transmission of vibration data; the acceleration signal formed during the bearing vibration process is mainly responsible for the transmitter The corresponding A / D conversion and FFT transformation are carried out. Through the operating signal monitored by the transmitter, the background technicians can timely understand the key parameters such as speed, displacement and quality factor during the operation of the bearing, so as to fully grasp the overall operation of the bearing and provide reliable protection for the normal operation of the bearing; the collector is mainly used to send the received signal to the data receiver or repeater. The addition of repeaters is mainly to meet the needs of a wider range of data transmission, ensure the stability of data transmission, and avoid the loss of important data; the monitoring host can identify the problems by systematically and comprehensively comparing and analyzing the received bearing operation data. For the data that exceeds the system-set threshold, the host will take early warning measures such as sound and light and text messages to promptly feedback the results to the background technicians. The technicians can take effective countermeasures based on their monitoring data to avoid the occurrence of bearing accidents.
[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A bearing body composed of a sliding bearing and a rolling bearing, characterized in that: The invention comprises a bearing cover (2), wherein a cavity is provided inside the bearing cover (2), wherein a pump shaft (1) rotatably connected to the bearing cover (2) is provided in the cavity, wherein a sliding bearing (4) is provided on the outer wall of the pump shaft (1), wherein the sliding bearing (4) is rotatably connected to the cavity of the bearing cover (2), wherein an oil slinger (5) is provided at the right end of the sliding bearing (4) and fixedly connected to the pump shaft (1), wherein a rolling bearing (7) is provided at the right end of the oil slinger (5), wherein the rolling bearing (7) is rotatably connected to the pump shaft (1), wherein a bearing end cover (6) is provided on the outer wall of the rolling bearing (7), wherein the rolling bearing (7) is fixedly connected to the bearing cover (2) via the bearing end cover (6), wherein an adjusting nut (8) is provided at the right end of the rolling bearing (7), wherein a test gear (9) is fixedly connected to the right end of the pump shaft (1), wherein a refueling cap (3) is fixedly connected to the upper end of the pump shaft (1), and wherein a bearing seat (10) fixedly connected to the bearing cover (2) is provided at the lower end of the pump shaft (1).
2. The bearing body of a combination of a sliding bearing and a rolling bearing according to claim 1, characterized in that: The clearance between the right end surface of the rolling bearing (7) and the bearing end cover (6) is in the range of 0.3 to 0.5 mm.
3. The bearing body of a combination of a sliding bearing and a rolling bearing according to claim 1, characterized in that: The gap between the left end surface of the test gear (9) and the bearing end cover (6) is 5 mm.
4. The bearing body of a combination of a sliding bearing and a rolling bearing according to claim 1, characterized in that: The sliding bearing (4) is a double ball bearing, and the upper end of the bearing cover (2) is symmetrically provided with oiling holes, which are directly opposite to the balls of the sliding bearing (4).
5. The bearing body of a combination of a sliding bearing and a rolling bearing according to claim 1, characterized in that: A protective cover fixedly connected to the bearing cover (2) is provided on the outer side of the test gear (9), and a hole perpendicular to the test gear (9) is opened at the upper end of the protective cover.
6. The bearing body of a combination of a sliding bearing and a rolling bearing according to claim 1, characterized in that: The bearing cover (2) and the bearing seat (10) are integrally formed by casting.