CN210780341U

CN210780341U - Water-cooling grease lubrication vibration motor

Info

Publication number: CN210780341U
Application number: CN201922248044.7U
Authority: CN
Inventors: 吴振军; 耿丽霞
Original assignee: Zhengzhou University of Light Industry
Current assignee: Zhengzhou University of Light Industry
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-06-16
Anticipated expiration: 2029-12-16

Abstract

The utility model relates to a water-cooling grease lubrication vibrating motor belongs to the material and carries equipment field technique. The utility model discloses the motor shaft passes through the bearing and installs in motor shaft, install rotor coil in the middle of the motor shaft, install stator coil on the motor casing corresponding with rotor coil, the eccentric block is installed at the motor shaft both ends, the bearing that uses is big play centripetal thrust bearing, the end cover is tight in motor casing's bearing room along the axial top with the bearing inner race through the boss above that, the motor casing is embedded to be cast and is had annular stainless steel cooling water pipe, adopt two sets of felt circles to carry out double sealing between motor shaft rotor coil both ends and motor casing, adopt single felt circle to seal between end cover and motor shaft, fill in the space in bearing room and annotate lubricating grease. This water-cooling grease lubrication vibration motor still can guarantee normal work when being used for handling the vibrating equipment of high temperature material, has apparent advantage.

Description

Water-cooling grease lubrication vibration motor

Technical Field

The utility model relates to a water-cooling fat lubrication vibrating motor for arousing high temperature material vibrating equipment vibration belongs to the material and carries equipment field technique.

Background

The vibration motor combines an eccentric block mechanical mechanism for generating vibration and an electrical mechanism for generating power, and has a series of advantages of compact structure, small size, convenient assembly and disassembly and the like, thereby being widely applied to various vibration devices. However, the motor has a certain problem in the working process, mainly because the motor shaft rotating at high speed is provided with the eccentric block, the bearing for supporting the motor shaft bears very large alternating stress in the working process, so that the temperature rise of the bearing is increased, and very much mechanical heat is generated. Meanwhile, for the vibration motor, the mounting position of the bearing is generally close to the stator coil and the rotor coil of the vibration motor, the stator coil and the rotor coil also need to generate very large electric heat due to the influence of alternating current in the working process, and the two types of heat are overlapped together, so that the working temperature of the vibration motor is greatly increased, and very large influence is caused on the stable work of the bearing and the motor coil. Therefore, some technological measures such as air cooling by a motor shaft with a fan are adopted to reduce the temperature rise of the vibration motor in the working process. However, under some special conditions, for example, when the vibration motor is installed on some vibration equipment for processing high-temperature materials, the vibration motor has not only mechanical friction heat and electrical loss heat generated by itself in the working process, but also thermal radiation and conduction effects of the high-temperature materials, and at this time, the cooling effect of the conventional air cooling measures is limited, so that the temperature of the vibration motor rapidly rises after the vibration motor starts to work, the service life of the vibration motor is shortened, and in severe cases, a motor bearing is locked, and a coil is burnt out, so that the vibration motor cannot be normally used under the working conditions. Therefore, for these special working conditions, if the vibration motor is to work normally, a new cooling structure must be adopted to solve the problem that the temperature rise of the vibration motor in the process is too high and too fast.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing such water-cooling fat lubrication vibrating motor, it can solve vibrating motor effectively and use the too high too fast problem of temperature rise that exists on the vibrating equipment of handling high temperature material.

The purpose of the utility model is realized like this: the utility model provides a water-cooling fat lubrication vibrating motor, contains motor casing, motor shaft, bearing, eccentric block, end cover, stator coil and rotor coil, the motor shaft passes through the bearing is installed in the motor casing, install in the middle of the motor shaft rotor coil, install on the motor casing corresponding with rotor coil stator coil, eccentric block install at the motor shaft both ends, the bearing is big internal clearance centripetal thrust bearing, the end cover will through the boss above that the bearing outer lane is tightly along axial top motor casing's bearing is indoor, the cast has annular stainless steel cooling water pipe in the motor casing motor shaft rotor coil both ends with adopt two sets of felt collars to carry out double sealing between the motor casing, the end cover with adopt single felt to seal between the motor shaft.

And the outer circle of the stainless steel cooling water pipe is provided with a radiating fin.

And a stainless steel water cooling pipe is embedded and cast in the end cover.

The protection casing is installed at motor casing both ends, the protection casing adopts the steel sheet structure of punching a hole, and the percent opening on the protection casing is not less than 50%.

Grid type protective covers are mounted at two ends of the motor shell, and steel wire meshes are arranged on the grid type protective covers.

The shell of the vibration motor is generally produced by adopting a casting process, when the motor shell is cast, a stainless steel pipe is made into an annular shape similar to the shape of the vibration motor shell in advance, then the stainless steel pipe is placed into a cavity of the cast motor shell, metal alloy is poured into the cavity of the cast motor shell, the stainless steel pipe is coated by the metal alloy, and only an interface part is left to be exposed outside the motor shell. The shape of the annular stainless steel pipe can be prefabricated according to the external dimension of the motor shell by adopting the imbedding process, the shape following performance is good, the annular stainless steel pipe can be close to the positions of a coil and a bearing chamber on the motor shell, wherein heat is relatively concentrated, and the imbedding process can ensure good mechanical and metallurgical bonding capacity between the stainless steel pipe and shell alloy.

The radial thrust bearing is adopted, and the bearing outer ring is axially pushed tightly in the bearing chamber of the motor shell from two ends through the lug bosses on the end covers to be positioned, so that the radial thrust bearing has the advantages of simple and convenient positioning structure. Because the vibration motor works, the heat radiation, the heat conduction, the mechanical friction heat and the electricity consumption heat in the coil act together, so that the parts such as the motor shell, the bearing, the motor shaft and the like inevitably have temperature and size changes, the axial direction and the radial direction of the bearing have certain adaptability, and the bearing with large clearance is adopted.

In the working process of the vibration motor, the bearing is lubricated by lubricating grease. If the bearing temperature rises too high, the viscosity of the grease will be greatly reduced, and the grease may penetrate through the seals and enter between the stator and rotor coils inside the motor housing, causing the coils to burn out. In order to solve the problem, except that a water cooling method is adopted to cool the motor shell, the bearing and the like to prevent the temperature of lubricating grease from being too high, two sets of felt rings are adopted between the two ends of a rotor coil of the motor shaft and the motor shell to carry out double sealing, the felt rings have good grease absorption performance and self-lubricating performance, the adaptability to grease lubrication is strong, and the sealing effect can be kept for a long time. Two sets of felt rings are adopted for sealing, so that lubricating grease can be effectively prevented from entering between a stator coil and a rotor coil of the motor in the working process, and the coils are prevented from being burnt. Because the sealing between the end cover and the motor shaft is mainly used for preventing the loss of lubricating grease, the overflow of a small amount of lubricating grease has little influence on the overall performance of the vibration motor, and therefore, a single felt ring is used for sealing between the end cover and the motor shaft so as to reduce the thickness dimension of the end cover.

The cooling fins are arranged on the outer circle of the stainless steel cooling water pipe and are cast in the motor shell as a whole, so that the cooling effect of the stainless steel cooling water pipe can be further improved, and the cooling fins are additionally arranged at the parts needing to be cooled particularly, so that the cooling effect is better.

The heat radiation effect of high-temperature materials is also very obvious in the working process of the vibration equipment, so that the heat transmitted to the vibration motor through the end covers can not be ignored, and for this reason, stainless steel water cooling pipes are also embedded in the end covers at the two ends of the vibration motor, so that the temperature of the end covers is effectively reduced, and the problem that the temperature rise of the vibration motor is too high due to the temperature rise of the end covers is prevented.

When the vibration motor works, a motor shaft drives the eccentric blocks at two ends to rotate at a high speed, and in order to prevent safety accidents caused by the high-speed rotating eccentric blocks, protective covers are required to be additionally arranged at the positions of the eccentric blocks at the two ends of the vibration motor for protection. The protective cover that uses generally is totally closed structure at present, causes the radiating effect variation of parts such as motor shaft, end cover, adopts the steel sheet structure of punching a hole with the protective cover for this reason, and the percent opening on the protective cover is not less than 50%, both can guarantee the protective effect, also can fall lower degree with the influence of protective cover to the radiating effect simultaneously.

Grid type protective covers are mounted at two ends of the motor shell, and steel wire meshes are arranged on the grid type protective covers, so that large holes in the protective covers are eliminated, safety accidents caused by fingers of related personnel stretching into the holes can be prevented, and small sundries or parts can be prevented from entering or flying out of the protective covers. In addition, the protective cover is of a structure of grid and steel wire mesh, so that a good heat dissipation effect can be still ensured.

Drawings

Fig. 1 and 2 show an embodiment of the present invention, wherein fig. 1 is a sectional view of a main structure of the embodiment, specifically, a sectional view taken from a position B to B in fig. 2, and fig. 2 is a sectional view taken from a position a to a in fig. 1.

Detailed Description

In the embodiment shown in fig. 1 and 2, the meaning of the serial numbers of the parts is as follows: 1. a protective cover; 2. an eccentric block; 3. a key; 4. a motor shaft; 5. sealing the felt ring; 6. an end cap; 7. a connecting bolt; 8. a bearing; 9. an inner felt; 10. a cooling water pipe; 11. A joint; 12. a stator coil; 13. a rotor coil; 14. a motor housing; 15. a retainer ring; 16. a water-cooled tube; 17. and (7) installing holes.

In the illustrated embodiment, the motor shaft 4 is mounted in the motor housing 14 by bearings 8, and bosses on the end caps 6 at both ends of the vibration motor abut against the outer race of the bearings to axially locate the bearings from both ends. The bearing adopts the centripetal thrust bearing of big internal clearance, and rotor coil 13 is installed to the motor shaft intermediate position, and stator coil 12 is installed to the inside relevant position of motor casing corresponding with rotor coil, and eccentric block 2 is installed to the both ends that the motor shaft stretches out motor casing symmetry respectively, adopts key 3 to be connected between eccentric block and the motor shaft, and eccentric block axial adopts retaining ring 15 to carry out the axis location. The eccentric block adopts protection casing 1 to protect, and the protection casing adopts the steel sheet structure of punching a hole, and the percent opening of protection casing is 60%. The protective cover and the end cover are screwed on two sides of the motor shell by adopting connecting bolts.

Two sets of inner felt rings 9 are adopted for double sealing on each side between the two ends of a rotor coil of a motor shaft and the motor shell, and a single sealing felt ring 5 is adopted for sealing between an end cover and the motor shaft. The space between the end cover and the motor shell for installing the bearing is filled with lubricating grease, and the volume of the filled lubricating grease is about 60 percent of the total pore volume of the part.

The cooling water pipe 10 made of stainless steel is embedded and cast in the motor shell in a spiral annular shape, and two joints 11 of a water outlet and a water inlet are led out from the middle part of the motor shell. The water-cooling tube 16 made of stainless steel is simultaneously embedded in the end cover, and a water outlet and a water inlet are led out from the side surface of the end cover by adopting a single-ring water-cooling tube because the thickness of the end cover is thinner.

The vibration motor is installed on the vibration equipment through the installation hole 17, and the stainless steel cooling water pipe and the stainless steel water cooling pipe joint are connected with a cooling water source through the hoses. And starting the vibration motor, and generating vibration by the vibration equipment. The stainless steel cooling water pipe and the water cooling pipe cannot influence the vibration of the vibration equipment due to the fact that the hoses are connected.

When high-temperature materials are processed on the vibration equipment, the high-temperature materials heat the vibration motor through heat radiation and heat conduction, and meanwhile, the vibration motor generates mechanical friction heat and electric loss heat in the working process, and the heat action jointly causes the vibration motor to generate temperature rise. At this time, the circulating cooling water is introduced into the cooling water pipe and the water cooling pipe, so that the circulating cooling water can generate a strong cooling effect on relevant parts such as the motor shell, the bearing, the end part and the like, and the temperature rise of the bearing is prevented from exceeding a specified value (generally lower than 50 ℃) so as to ensure that the vibration motor can work for a long time.

Because the temperature rise of the bearing is low, the felt rings with good grease absorption performance and self-lubricating performance are adopted for sealing, and a double-sealing structure of two sets of felt rings is adopted between the bearing and the stator coil and the rotor coil, the lubricating grease can be effectively prevented from entering the stator coil and the rotor coil from the bearing chamber, and the coils can be protected from being burnt due to grease pollution. A single felt ring is used for sealing between the motor shaft and the end cover, so that a large amount of lubricating grease can be prevented from overflowing and losing, and the vibration motor can keep normal operation in a maintenance and lubricating grease filling period.

The steel plate punching type protective covers at the two ends of the eccentric block have good ventilation performance, and the cooling effect of adjacent parts can be guaranteed.

Claims

1. The utility model provides a water-cooling fat lubrication vibrating motor, contains motor casing, motor shaft, bearing, eccentric block, end cover, stator coil and rotor coil, the motor shaft passes through the bearing is installed in the motor casing, install in the middle of the motor shaft rotor coil installs on the motor casing corresponding with rotor coil stator coil, eccentric block install at the motor shaft both ends, its characterized in that: the bearing is a large-play radial thrust bearing, the end cover is used for pushing the outer ring of the bearing tightly along the axial direction in the bearing chamber of the motor shell through a boss on the end cover, an annular stainless steel cooling water pipe is embedded in the motor shell, two sets of felt rings are adopted between the two ends of a rotor coil of the motor shaft and the motor shell for double sealing, and a single felt ring is adopted between the end cover and the motor shaft for sealing.

2. The water-cooled grease-lubricated vibration motor according to claim 1, wherein: and the outer circle of the stainless steel cooling water pipe is provided with a radiating fin.

3. The water-cooled grease-lubricated vibration motor according to claim 2, wherein: and a stainless steel water cooling pipe is embedded and cast in the end cover.

4. The water-cooled grease-lubricated vibration motor according to claim 1, 2 or 3, wherein: the protection casing is installed at motor casing both ends, the protection casing adopts the steel sheet structure of punching a hole, and the percent opening on the protection casing is not less than 50%.

5. The water-cooled grease-lubricated vibration motor according to claim 1, 2 or 3, wherein: grid type protective covers are mounted at two ends of the motor shell, and steel wire meshes are arranged on the grid type protective covers.