An electric variable frequency vibrator with good heat dissipation and lubrication functions

Abstract

The invention discloses an electric variable frequency vibrator with good heat dissipation and lubrication functions, including a vibrator head, a shell, and a variable frequency motor. A main shaft is arranged inside the shell, and an upper bearing and a lower bearing are respectively installed between the upper and lower parts of the main shaft and the shell. A collecting groove is arranged at the upper end of the vibrator head, and the main shaft is connected to the variable frequency motor through an elastic coupling. An air supply channel is arranged inside the output shaft, and an air inlet connected to the air supply channel is opened on the upper side wall of the output shaft. An oil supply channel is arranged inside the main shaft, and an oil outlet hole connected to the oil supply channel is arranged on the upper side wall of the main shaft. The oil outlet hole and the oil supply channel are both connected to the oil passage. An air pipe connected to the air supply channel is arranged in the oil supply channel, and an air outlet channel opposite to the eccentric block is arranged on the side wall of the main shaft. The air outlet channel is connected to the air pipe and is located above the lubricating oil liquid level. The invention can not only improve the heat dissipation effect of the variable frequency motor, but also achieve good lubrication of the bearing.

Description

Technical Field

[0001] The invention relates to the technical field of vibro-frequency converters, and in particular to an electric variable frequency vibro-frequency converter with good heat dissipation and lubrication functions. Background Art

[0002] Vibratory impactors are special machines used in vibratory impact construction. There are electric and hydraulic vibratory impactors. They can generate horizontal vibration force to vibrate the filler and surrounding soil, thereby improving the bearing capacity of the foundation, reducing settlement, increasing foundation stability, and improving the ability to resist earthquake liquefaction. Compared with hydraulic vibratory impactors, electric vibratory impactors are driven by motors, and they do not need to arrange related hydraulic pipelines. They have a wider range of applications and are more universal.

[0003] In electric vibrators, variable frequency motors are generally used to achieve power output. The variable frequency motors are completely enclosed in the upper end of the vibrator shell, and a large amount of heat is generated when working. Due to the particularity of the installation, they do not have a cooling fan. Therefore, a motor water jacket is generally provided outside the variable frequency motor. The side wall of the motor water jacket has a water flow channel. The vibrator itself needs to pass water and high-pressure gas when working. The water flow channel on the motor water jacket is connected to the water flow channel in the side wall of the vibrator shell, and the water flow channel on the side wall of the shell is connected to the water outlet at the bottom of the vibrating head. Water flows through the water flow channel on the side wall of the motor water jacket, which can take away part of the heat emitted by the variable frequency motor, but the effect is not Very ideal; the output shaft of the variable frequency motor is connected to the main shaft through an elastic coupling, an eccentric block is provided on one side of the main shaft, bearings are provided at the upper and lower ends of the main shaft, and lubricating oil is contained in the housing. At present, the centrifugal force generated by the rotation of the main shaft is generally used to throw the lubricating oil to the upper side to lubricate the upper bearing. In the Chinese patent CN115928697B, a flow channel is provided inside the main shaft, and a plunger pump is provided under the main shaft to pump the lubricating oil to the upper side to lubricate the upper bearing. Although this method has a good lubrication effect, the structure is extremely complex. Although it can better achieve lubrication of the bearing, it cannot solve the problem of poor heat dissipation of the variable frequency motor. Therefore, there is an urgent need for an electric variable frequency vibrator that can both better achieve heat dissipation of the variable frequency motor and achieve good lubrication of the bearing. Summary of the invention

[0004] The object of the present invention is to provide an electric variable frequency vibrator with good heat dissipation and lubrication functions, which can not only improve the heat dissipation effect of the variable frequency motor, but also achieve good lubrication of the bearings.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions:

[0006] An electric variable frequency vibrator with good heat dissipation and lubrication functions, comprising a vibrating head, a shell, and a variable frequency motor. The lower end of the shell is fixedly connected to the upper end of the vibrating head. A main shaft is arranged inside the shell. An upper bearing and a lower bearing are respectively installed between the upper and lower parts of the main shaft and the shell. An eccentric block is arranged on the outer side of the main shaft. An oil passage is also arranged inside the shell. Lubricating oil for lubricating the upper bearing and the lower bearing is arranged in the oil passage. A collecting groove connected to the oil passage is arranged on the upper end of the vibrating head. The upper end of the main shaft is connected to the output shaft of the variable frequency motor through an elastic coupling. A motor water jacket connected to the shell is arranged on the outer side of the variable frequency motor. A first water flow channel is provided in the side wall of the motor water jacket, a second water flow channel connected to the first water flow channel is provided on the side wall of the shell body, a water outlet connected to the second water flow channel is provided at the bottom of the vibrating head, an air delivery channel is provided inside the output shaft, an air inlet connected to the air delivery channel is provided on the upper side wall of the output shaft, an oil delivery channel is provided inside the main shaft, an oil outlet hole connected to the oil delivery channel is provided on the upper side wall of the main shaft, the oil outlet hole and the oil delivery channel are both connected to the oil passage, an air pipe connected to the air delivery channel is provided in the oil delivery channel, an outlet flow channel opposite to the eccentric block is provided on the side wall of the main shaft, the outlet flow channel is connected to the air pipe and is located above the liquid level of the lubricating oil.

[0007] In this scheme, an air delivery channel is opened inside the output shaft along its axial direction, the upper end of the output shaft of the variable frequency motor is located outside the motor, and an air inlet connected to the air delivery channel is opened on the side wall of the upper end of the output shaft, so that the high-temperature hot air generated by the variable frequency motor when working can enter the air delivery channel from the air inlet, and an oil delivery channel is opened inside the main shaft along its axial direction, and an air delivery pipe connected to the air delivery channel is arranged inside the oil delivery channel, and an oil outlet hole located above the upper bearing is opened on the side wall of the main shaft, so that when the vibrator is working, When the vibration head is used, water can be injected into the first water flow channel and the second water flow channel through the existing water supply system. The injected water is flushed out from the water outlet at the bottom of the vibrating head. The first water flow channel can take away part of the heat generated by the variable frequency motor when it is working, and the other part of the heat enters the gas delivery channel and the gas delivery pipe through the air inlet. As the gas delivery pipe continuously delivers gas to the shell, the internal air pressure of the cavity above the lubricating oil level inside the shell gradually increases. The high pressure on the lubricating oil level allows the lubricating oil to be pressed into the oil delivery channel and output from the oil outlet to the upper shaft The bearing is lubricated, and the lubricating oil after lubrication flows to the collecting tank again through the oil passage. The lubricating oil in the oil delivery channel can exchange heat with the hot air in the air pipe to accelerate the fluidity of the lubricating oil in the oil delivery channel. The heat generated by the variable frequency motor can be continuously transported to the air pipe through the air inlet for heat exchange or to squeeze the lubricating oil to do work. In this way, the heat generated by the variable frequency motor can be discharged in time, and combined with the heat dissipation effect of the first water flow channel, the heat dissipation effect of the electric variable frequency vibrator is greatly improved. While dissipating heat, the fluidity of the lubricating oil can also be improved, making it easier for the lubricating oil to lubricate the upper bearing, thereby improving the lubrication effect of the bearing. At the same time, the high pressure generated by the internal air pressure of the shell can squeeze the lubricating oil to do work, and the heat energy is converted into the kinetic energy of the lubricating oil. Part of the heat can be consumed when doing work, and the lubricating oil can also be lifted to the top of the upper bearing, so that the lubrication effect of the upper bearing is better. The principle of squeezing the lubricating oil in this scheme is similar to that of a pump. Its structure is simple and practical, and no additional fluid conveying components are required.

[0008] Optionally, a rotary joint is provided at the top end of the output shaft, an air outlet end of the rotary joint is connected to the air delivery channel, and an air inlet end of the rotary joint is connected to an external air pump.

[0009] Optionally, an air outlet pipe is provided at the air outlet end of the rotary joint, and the air outlet pipe is vertically fixed inside the output shaft, and the outlet of the air outlet pipe is located below the air inlet.

[0010] Optionally, the rotary joint adopts a threaded pneumatic joint of model KSH.

[0011] Optionally, a plurality of air inlets are evenly distributed along the circumference of the output shaft, and an air inlet channel is provided between the air inlet and the air delivery channel.

[0012] Optionally, the intake air channel is an arc-shaped channel, and the arc top of the intake air channel faces the opposite direction of the output shaft rotation, the air inlet is elliptical, the inner diameter of the intake air channel gradually decreases toward the air delivery channel, and a filter is provided inside the intake air channel.

[0013] Optionally, a guide plate integrally formed with the output shaft is provided on one side of the air inlet, and the guide plate is a U-shaped structure.

[0014] Optionally, the gas delivery channel is connected to the gas delivery pipe via a flexible rubber tube, and the flexible rubber tube is located inside the elastic coupling.

[0015] Optionally, a filter is provided at the lower end of the oil flow channel, the upper end of the oil flow channel does not penetrate the main shaft upward, and the lower end of the oil flow channel penetrates the main shaft downward. The side wall of the air pipe and the side wall of the oil flow channel are connected by a fixing rod, and multiple fixing rods are distributed along the length direction of the air pipe. The air pipe can be distributed in a straight line or in a spiral shape.

[0016] Optionally, a first oil channel is arranged between the middle section of the main shaft and the shell, an annular bearing cover is also arranged above the upper bearing, the bearing cover is sleeved on the outside of the upper end of the main shaft, a plurality of first through holes are arranged on the bearing cover, a second oil channel is arranged between the bearing cover and the upper bearing, and a second through hole is arranged between the upper bearing and the shell; a third oil channel which completely accommodates the lower end of the main shaft is arranged between the lower bearing and the lower end of the shell; a fourth oil channel located above the bearing cover is arranged between the upper end of the main shaft and the shell, the fourth oil channel is connected to the first oil channel through the second through hole, the fourth oil channel is connected to the second oil channel through the first through hole, the oil outlet hole is connected to the second oil channel, and multiple oil outlet holes are distributed in the circumferential direction of the main shaft; an oil drain hole connected to the collecting tank is also arranged on one side of the vibrating head, and a hole plug is installed at the oil drain hole.

[0017] The present invention has the beneficial effects:

[0018] 1. In the present invention, the heat generated by the variable frequency motor can be continuously transported through the air inlet to the air pipe for heat exchange or to squeeze the lubricating oil to do work, so that the heat generated by the variable frequency motor can be discharged in time, and combined with the heat dissipation effect of the first water flow channel, the heat dissipation effect of the electric variable frequency vibrator is greatly improved. While dissipating heat, it can also exchange heat with the lubricating oil to increase the temperature of the lubricating oil, and then the fluidity of the lubricating oil can be improved, so that the lubricating oil can be more easily squeezed to the top of the upper bearing, thereby improving the lubrication effect of the bearing. At the same time, the high pressure generated by holding the pressure can squeeze the lubricating oil to do work, which can consume part of the heat while doing work, and at the same time, the lubricating oil can be lifted to the top of the upper bearing, so that the lubrication effect of the upper bearing is better. The principle of squeezing the lubricating oil in this scheme is similar to the function of a pump, and its structure is simple and practical, and no additional fluid conveying equipment is required.

[0019] 2. The guide plate on the side of the air inlet can increase the intake of hot air when the output shaft rotates, speed up the entry of hot air into the air delivery channel, and improve the heat dissipation effect.

[0020] 3. After the high-pressure gas enters the shell, it can increase the squeezing effect on the lubricating oil and accelerate the improvement efficiency of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the distribution structure of the air inlet at the upper end of the output shaft;

[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0024] Figure 4 Schematic diagram of the position of the guide plate and the air inlet.

[0025] Figure numerals: 1-motor water jacket, 2-frequency motor, 3-first water flow channel, 4-flexible rubber tube, 5-fourth oil channel, 6-bearing cover, 7-second oil channel, 8-upper bearing, 9-first oil channel, 10-housing, 11-oil delivery channel, 12-spindle, 13-vibrating punch, 14-collecting tank, 15-water outlet, 16-hole plug, 17-oil drain hole, 18-third oil channel, 19-lower bearing, 20-lubricating Lubricating oil, 21-lubricating oil level, 22-eccentric block, 23-second through hole, 24-air pipe, 25-first through hole, 26-second water flow channel, 27-elastic coupling, 28-output shaft, 29-air flow channel, 30-air inlet, 31-guide plate, 32-rotating joint, 33-air outlet pipe, 34-filter sheet, 35-inlet flow channel, 36-oil outlet hole, 37-outlet flow channel, 38-filter screen. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] An electric variable frequency vibrator with good heat dissipation and lubrication functions, comprising a vibrating head 13, a shell 10, and a variable frequency motor 2. The lower end of the shell 10 is fixedly connected to the upper end of the vibrating head 13. A main shaft 12 is arranged inside the shell 10. An upper bearing 8 and a lower bearing 19 are respectively installed between the upper and lower parts of the main shaft 12 and the shell 10. An eccentric block 22 is arranged on the outer side of the main shaft 12. An oil passage is also arranged inside the shell 10. Lubricating oil 20 for lubricating the upper bearing 8 and the lower bearing 19 is arranged in the oil passage. A collecting tank 14 connected to the oil passage is arranged on the upper end of the vibrating head 13. The upper end of the main shaft 12 is connected to the output shaft 28 of the variable frequency motor 2 through an elastic coupling 27. A motor water jacket 1 connected to the shell 10 is arranged on the outer side of the variable frequency motor 2. 1 is provided with a first water passage 3 in the side wall, a second water passage 26 connected to the first water passage 3 is provided on the side wall of the shell 10, a water outlet 15 connected to the second water passage 26 is provided at the bottom of the vibrating head 13, an air delivery passage 29 is provided inside the output shaft 28, an air inlet 30 connected to the air delivery passage 29 is opened on the upper side wall of the output shaft 28, an oil delivery passage 11 is provided inside the main shaft 12, an oil outlet hole 36 connected to the oil delivery passage 11 is provided on the upper side wall of the main shaft 12, the oil outlet hole 36 and the oil delivery passage 11 are both connected to the oil passage, an air delivery pipe 24 connected to the air delivery passage 29 is provided in the oil delivery passage 11, an outlet passage 37 opposite to the eccentric block 22 is provided on the side wall of the main shaft 12, the outlet passage 37 is connected to the air delivery pipe 24 and is located above the lubricating oil level 21.

[0030] In this embodiment, Figure 1As shown, an air delivery channel 29 is provided inside the output shaft 28 along its axial direction, the upper end of the output shaft 28 of the variable frequency motor 2 is located outside the motor, and an air inlet 30 connected to the air delivery channel 29 is provided on the side wall of the upper end of the output shaft 28, so that the high-temperature hot air generated by the variable frequency motor 2 when working can enter the air delivery channel 29 from the air inlet 30, and an oil delivery channel 11 is provided inside the main shaft 12 along its axial direction, and an air delivery pipe 24 connected to the air delivery channel 29 is arranged inside the oil delivery channel 11, and an oil outlet hole 36 located above the upper bearing 8 is provided on the side wall of the main shaft 12, so that when the vibrator is working, water can be injected into the first water flow channel 3 and the second water flow channel 26 through the existing water supply system, and the water introduced is discharged from the bottom of the vibrating head 13 The water outlet 15 is flushed out, the first water flow channel 3 can take away part of the heat generated by the variable frequency motor 2 when it is working, and the other part of the heat enters the air delivery channel 29, the air delivery pipe 24, and the outlet flow channel 37 in sequence through the air inlet 30. The outlet flow channel 37 is set to be tilted downward to prevent the lubricating oil 20 from automatically flowing out after a small amount of it is thrown in. At the same time, the air inlet flow channel 35 and the side wall of the main shaft 12 are sealed, and a sealing ring or a sealant can be set. The outlet flow channel 37 is actually an extension of the air delivery pipe 24, and the two are integrally formed. The upper end of the air delivery pipe 24 passes through the top position of the oil delivery channel 11 and also needs to be sealed. A sealant can be applied. As the air delivery pipe 24 continuously delivers hot air to the shell 10, the hot air can exchange heat with the lubricating oil 20 below, thereby improving lubrication. The temperature of the oil 20 is increased, its viscosity is reduced, and the fluidity of the lubricating oil 20 is improved. As the internal air pressure of the cavity above the lubricating oil liquid level 21 inside the housing 10 gradually increases, the high pressure on the lubricating oil liquid level 21 allows the lubricating oil 20 in the collecting tank 14 to be squeezed into the oil delivery channel 11. The lubricating oil 20 is output from bottom to top along the oil delivery channel 11 to the oil outlet hole 36, and then output from the oil outlet hole 36 to lubricate the upper bearing 8. The lubricated lubricating oil 20 flows into the collecting tank 14 again through the oil passage. The lubricating oil 20 in the oil delivery channel 11 can exchange heat with the hot air in the air delivery pipe 24 to accelerate the fluidity of the lubricating oil 20 in the oil delivery channel 11. The heat generated by the variable frequency motor 2 can be continuously transported to the air delivery pipe 24 through the air inlet 30. Heat exchange is performed or the lubricating oil 20 is squeezed to do work, so that the heat generated by the variable frequency motor 2 can be discharged in time, and combined with the heat dissipation effect of the first water flow channel 3, the heat dissipation effect of the electric variable frequency vibrator is greatly improved. While dissipating heat, the fluidity of the lubricating oil 20 can also be improved, so that the lubricating oil 20 is more easily squeezed to the top of the upper bearing 8, thereby improving the lubrication effect of the bearing. At the same time, the high pressure generated by the gas pressure can be squeezed to do work on the lubricating oil 20, and the heat energy is converted into the kinetic energy of the lubricating oil 20. Part of the heat can be consumed when doing work, and at the same time, the lubricating oil 20 can be lifted to the top of the upper bearing 8, so that the lubrication effect of the upper bearing 8 is better. The principle of squeezing the lubricating oil 20 in this scheme is similar to the function of a pump, and its structure is simple and practical.No additional fluid conveying equipment is required. The lubricating oil 20 is squeezed by the air pressure above the lubricating oil liquid surface 21, so that the lubricating oil 20 rises from the collecting tank 14 to the top of the upper bearing 8. Compared with the prior art method of relying on centrifugal force to lubricate the upper bearing 8, the lubrication method in this scheme does not require too much lubricating oil 20, and the cost of using the lubricating oil 20 is reduced. At the same time, the reduction in the amount of lubricating oil 20 can reduce the resistance to the rotation of the main shaft 12. Furthermore, the water flowing through the second water flow channel 26 can cool the lubricating oil 20 with too high a temperature to prevent the temperature of the lubricating oil 20 from exceeding the required range and affecting its lubrication effect. In the prior art, the lower bearing 19 is completely immersed in the lubricating oil 20, so this scheme is mainly aimed at the lubrication effect of the upper bearing 8.

[0031] Furthermore, a rotary joint 32 is provided at the top of the output shaft 28, the air outlet of the rotary joint 32 is connected to the air delivery channel 29, and the air inlet of the rotary joint 32 is connected to the external air pump. Specifically, the rotary joint 32 can be better connected to the external air pump through a pipeline, so that the high rotation of the output shaft 28 will not cause the air pump output pipeline to be entangled.

[0032] Furthermore, an air outlet pipe 33 is provided at the air outlet end of the rotary joint 32 . The air outlet pipe 33 is vertically fixed inside the output shaft 28 , and the outlet of the air outlet pipe 33 is located below the air inlet 30 .

[0033] Specifically, Figure 1 As shown, the air outlet pipe 33 is located below the air inlet 30, so that the high-pressure gas will not hinder the entry of hot air at the air inlet 30 when entering. There is a gap between the air outlet pipe 33 and the air delivery channel 29, so as to avoid hindering the hot gas from entering the air delivery channel 29. The gap can be appropriately increased to increase the flow rate of hot gas, specifically, the diameter of the upper end of the air delivery channel 29 is expanded. After the high-pressure gas enters the housing 10, the speed of the hot gas in the air delivery channel 29 being transported downward can be accelerated, and at the same time, the air pressure above the lubricating oil liquid level 21 can be increased, which can increase the squeezing effect on the lubricating oil 20 and accelerate the lifting efficiency of the lubricating oil 20. The high-pressure gas can control the intake time through the valve at the output end of the air pump (not shown in the figure), and there is no need to continuously input high-pressure gas. The valve is opened at intervals to input a certain amount of high-pressure gas.

[0034] Furthermore, the rotary joint 32 is a threaded pneumatic joint of model KSH. Specifically, the threaded rotary joint 32 is convenient for installation and removal with the output shaft 28.

[0035] Furthermore, the air inlets 30 are evenly distributed along the circumference of the output shaft 28, and an air inlet channel 35 is provided between the air inlet 30 and the air delivery channel 29. Specifically, the multiple air inlets 30 can increase the air intake, speed up the heat flow from the air delivery channel 29, and improve the heat dissipation effect.

[0036] Furthermore, the intake channel 35 is an arc channel, and the arc top of the intake channel 35 faces the opposite direction of the output shaft 28. The air inlet 30 is elliptical, and the inner diameter of the intake channel 35 gradually decreases toward the air delivery channel 29. A filter screen 38 is provided inside the intake channel 35.

[0037] Specifically, Figure 3 As shown, the shape of the inlet flow channel 35 is arc-shaped, and the arc-shaped design helps to guide the airflow to enter and flow through the flow channel more smoothly. The shape of the air inlet 30 is elliptical, which helps to capture and introduce the hot air flow more effectively. The inner diameter of the inlet flow channel 35 gradually decreases toward the air delivery channel 29: from the air inlet 30 to the air delivery channel 29, the inner diameter of the flow channel is gradually reduced. This design helps to accelerate the airflow and increase the pressure of the airflow. The existence of the filter 38 is to filter out impurities and particulate matter in the airflow to avoid clogging the air delivery channel 29 and the air delivery pipe 24.

[0038] Furthermore, a guide plate 31 integrally formed with the output shaft 28 is provided on one side of the air inlet 30 , and the guide plate 31 is a U-shaped structure.

[0039] Specifically, Figure 2 and Figure 3 As shown, the guide plate 31 is integrally formed with the output shaft 28 to increase the connection firmness. The guide plate 31 can guide the hot air into the intake flow channel 35 when the output shaft 28 rotates, thereby improving the suction efficiency. Figure 4 As shown, the guide plate 31 has an opening facing the air inlet 30, which is oriented toward the direction of rotation of the output shaft 28, and then bends to both sides to form a shape similar to the letter "U". This design helps to more effectively capture and guide hot air into the intake air duct 35, reduce circumferential heat accumulation of the variable frequency motor 2, and improve the heat dissipation effect.

[0040] Furthermore, the air delivery channel 29 is connected to the air delivery pipe 24 via a flexible rubber tube 4, and the flexible rubber tube 4 is located inside the elastic coupling 27. Specifically, the flexible rubber tube 4 can better match the corresponding displacement action of the elastic coupling 27.

[0041] Furthermore, a filter mesh 34 is provided at the lower end of the oil flow channel 11, the upper end of the oil flow channel 11 does not penetrate the main shaft 12 upward, and the lower end of the oil flow channel 11 penetrates the main shaft 12 downward. The side wall of the air pipe 24 is connected to the side wall of the oil flow channel 11 by a fixing rod, and multiple fixing rods are distributed along the length direction of the air pipe 24. The air pipe 24 can be distributed in a straight line or a spiral shape.

[0042] Specifically, the filter 34 can prevent debris in the lubricating oil 20 from entering the oil flow channel 11, reducing the risk of blockage. The fixing rod (not shown in the figure) can fix the air pipe 24. The spirally distributed air pipe 24 can increase the contact time with the lubricating oil 20 in the oil flow channel 11, thereby improving the heat exchange efficiency.

[0043] Furthermore, a first oil passage 9 is provided between the middle section of the main shaft 12 and the housing 10, an annular bearing cover 6 is further provided above the upper bearing 8, the bearing cover 6 is sleeved on the outside of the upper end of the main shaft 12, a plurality of first through holes 25 are provided at the bearing cover 6, a second oil passage 7 is provided between the bearing cover 6 and the upper bearing 8, a second through hole 23 is provided between the upper bearing 8 and the housing 10; a third oil passage 7 is provided between the lower bearing 19 and the lower end of the housing 10 to completely accommodate the lower end of the main shaft 12 Channel 18; a fourth oil channel 5 located above the bearing cover 6 is provided between the upper end of the main shaft 12 and the housing 10, the fourth oil channel 5 is connected to the first oil channel 9 through the second through hole 23, the fourth oil channel 5 is connected to the second oil channel 7 through the first through hole 25, the oil outlet hole 36 is connected to the second oil channel 7, and a plurality of oil outlet holes 36 are distributed in the circumferential direction of the main shaft 12, and an oil drain hole 17 connected to the collecting groove 14 is also provided on one side of the vibrating head 13, and a hole plug 16 is installed at the oil drain hole 17.

[0044] Specifically, after the lubricating oil 20 is squeezed into the oil delivery channel 11, it enters the second oil channel 7 through the oil outlet hole 36. The second oil channel 7 is located above the upper bearing 8, so that the upper bearing 8 can be lubricated from top to bottom. The excess lubricating oil 20 in the second oil channel 7 can enter the first oil channel 9 through the first through hole 25, and then flow to the lower bearing 19 through the first oil channel 9, and then enter the third oil channel 18 through the gap of the lower bearing 19. The cavity of the first oil channel 9 located above the liquid surface is a gas pressure accumulation area, and the hot air generates pressure here and squeezes the lubricating oil 20 downward, so that the lubricating oil 20 in the collecting tank 14 moves upward along the oil delivery channel 11 and is output from the oil outlet hole 36 to the second oil channel 7, thereby lubricating the upper bearing 8. After lubrication, the lubricating oil 20 falls into the first oil channel 9 along the gap in the upper bearing 8, and continues to flow from the gap of the lower bearing 19 to the collecting tank 14, so that the upper bearing 8 is well lubricated in this cycle. When the main shaft 12 does not rotate, the lubricating oil 20 in the oil passage completely immerses the lower bearing 19, and at the same time, the collecting groove 14 is also completely immersed in the lubricating oil 20; whether it is the lower bearing 19 or the upper bearing 8, it has a gap itself, which can allow a part of the lubricating oil 20 to pass through. When the lubricating oil 20 in the oil passage needs to be released, the hole plug 16 is opened, and the lubricating oil 20 in the oil passage will pass through the collecting groove 14 in turn and finally be discharged from the oil drain hole 17. When new lubricating oil 20 is needed, new lubricating oil 20 can be added from the fourth oil passage 5. The entire oil passage includes the first oil passage 9, the second oil passage 7, the third oil passage 18, the fourth oil passage 5, the first through hole 25, the second through hole 23, the oil delivery channel 11, and the oil outlet hole 36. After the variable frequency motor 2 stops working, the pipeline above the rotary joint 32 can be removed to allow the gas above the lubricating oil liquid level 21 to be naturally discharged to achieve the purpose of pressure relief.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. An electric variable frequency vibrator with good heat dissipation and lubrication functions, comprising a vibrating head (13), a housing (10), and a variable frequency motor (2), wherein the lower end of the housing (10) is fixedly connected to the upper end of the vibrating head (13), a main shaft (12) is arranged inside the housing (10), an upper bearing (8) and a lower bearing (19) are respectively installed between the upper and lower parts of the main shaft (12) and the housing (10), an eccentric block (22) is arranged outside the main shaft (12), an oil passage is also arranged inside the housing (10), and a lubricating oil passage is arranged inside the oil passage for lubricating the upper bearing (8) and the lower bearing (19). The vibrating head (13) is provided with a collecting groove (14) connected to the oil passage at the upper end thereof, the upper end of the main shaft (12) is connected to the output shaft (28) of the variable frequency motor (2) through an elastic coupling (27), the outer side of the variable frequency motor (2) is provided with a motor water jacket (1) connected to the housing (10), the side wall of the motor water jacket (1) is provided with a first water flow channel (3), the side wall of the housing (10) is provided with a second water flow channel (26) connected to the first water flow channel (3), and the bottom of the vibrating head (13) is provided with a water outlet (15) connected to the second water flow channel (26), characterized in that: The output shaft (28) is provided with an air delivery channel (29) inside, and an air inlet (30) connected to the air delivery channel (29) is formed on the upper side wall of the output shaft (28). The main shaft (12) is provided with an oil delivery channel (11) inside, and an oil outlet hole (36) located above the upper bearing (8) is formed on the side wall of the main shaft (12). The oil outlet hole (36) is connected to the oil delivery channel (11), and the oil outlet hole (36) and the oil delivery channel (11) are both connected to the oil passage. An air delivery pipe (24) connected to the air delivery channel (29) is formed in the oil delivery channel (11). An outlet air channel (37) is formed on the side wall of the main shaft (12) and is arranged opposite to the eccentric block (22). The outlet air channel (37) is connected to the air delivery pipe (24) and is located above the lubricating oil level (21).

2. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 1 is characterized in that: A rotary joint (32) is provided at the top end of the output shaft (28); an air outlet end of the rotary joint (32) is connected to the air delivery channel (29); and an air inlet end of the rotary joint (32) is connected to an external air pump.

3. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 2 is characterized in that: An air outlet pipe (33) is provided at the air outlet end of the rotary joint (32). The air outlet pipe (33) is vertically fixed inside the output shaft (28), and the outlet of the air outlet pipe (33) is located below the air inlet (30).

4. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 3 is characterized in that: The rotary joint (32) is a threaded pneumatic joint of model KSH.

5. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 1 is characterized in that: A plurality of air inlets (30) are evenly distributed along the circumference of the output shaft (28), and an air inlet channel (35) is provided between the air inlet (30) and the air delivery channel (29).

6. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 5 is characterized in that: The inlet flow channel (35) is an arc-shaped flow channel, and the arc top of the inlet flow channel (35) faces the direction opposite to the rotation of the output shaft (28). The air inlet (30) is elliptical, and the inner diameter of the inlet flow channel (35) gradually decreases toward the direction of the air delivery channel (29). A filter screen (38) is provided inside the inlet flow channel (35).

7. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 6 is characterized in that: A guide plate (31) formed integrally with the output shaft (28) is provided on one side of the air inlet (30), and the guide plate (31) is a U-shaped structure.

8. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 1 is characterized in that: The gas delivery channel (29) is connected to the gas delivery pipe (24) via a flexible rubber tube (4), and the flexible rubber tube (4) is located inside the elastic coupling (27).

9. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 1 is characterized in that: A filter sheet (34) is provided at the lower end of the oil delivery channel (11); the upper end of the oil delivery channel (11) does not penetrate the main shaft (12) upwards; the lower end of the oil delivery channel (11) penetrates the main shaft (12) downwards; the side wall of the air delivery pipe (24) is connected to the side wall of the oil delivery channel (11) via a fixing rod; a plurality of fixing rods are distributed along the length direction of the air delivery pipe (24); and the air delivery pipe (24) can be distributed in a straight line or in a spiral shape.

10. The electric variable frequency vibrator with good heat dissipation and lubrication functions according to claim 1, characterized in that: A first oil passage (9) is provided between the middle section of the main shaft (12) and the housing (10); an annular bearing cover (6) is further provided above the upper bearing (8); the bearing cover (6) is sleeved outside the upper end of the main shaft (12); a plurality of first through holes (25) are provided at the bearing cover (6); a second oil passage (7) is provided between the bearing cover (6) and the upper bearing (8); a second through hole (23) is provided between the upper bearing (8) and the housing (10); and a third oil passage (18) is provided between the lower bearing (19) and the lower end of the housing (10) to completely accommodate the lower end of the main shaft (12). A fourth oil passage (5) located above the bearing cover (6) is provided between the upper end of the main shaft (12) and the housing (10); the fourth oil passage (5) is connected to the first oil passage (9) via the second through hole (23); the fourth oil passage (5) is connected to the second oil passage (7) via the first through hole (25); an oil outlet hole (36) is connected to the second oil passage (7); a plurality of oil outlet holes (36) are distributed in the circumferential direction of the main shaft (12); an oil drain hole (17) connected to the collecting groove (14) is also provided on one side of the vibrating punch (13); a hole plug (16) is installed at the oil drain hole (17).

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