Lubricating structure of water-cooled YBZJ type motor

Abstract

The utility model relates to a lubrication structure of a water-cooled YBZJ type motor, which comprises an end cover, a motor rotating shaft and an oil seal, the end cover is vertically symmetrical and is horizontally provided with an oil inlet channel and an oil outlet channel, and an oil passing channel is arranged in the wall surface of the oil seal. The three annular comb tooth grooves, the annular oil return groove and the annular air pressure groove are sequentially formed in the inner wall of the oil seal from left to right, lubricating oil flowing into the oil seal is blocked layer by layer when passing through the comb tooth grooves, flows back into the oil outlet channel through the oil passing channel and finally converges into an oil path circulating system, and therefore the lubricating oil is prevented from entering the oil path circulating system. The lubricating oil is recycled; in addition, when the motor rotating shaft rotates, the air inlet fan is driven to rotate, external air is sucked into the pressure ring pipe, air pressure which is pressed to the air pressure groove 11 is formed in the pressure ring pipe, the air pressure in the air pressure groove is used for preventing a small part of lubricating oil permeating into the gap between the oil seal and the motor rotating shaft from continuously permeating, and loss of the lubricating oil in the using process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a lubrication structure of a water-cooled YBZJ type motor. Background Art

[0002] As a type of explosion-proof motor, YBZJ motor is mainly used in flammable and explosive places. Compared with the traditional motor, the use environment is more demanding, so higher technical requirements are put forward. The rotor in the YBZJ motor drives the shaft to rotate at high speed. The shaft is connected to the motor casing through bearings. Lubricating oil or grease needs to be injected into the motor bearings for lubrication, so as to reduce friction and wear and increase the service life and torque of the motor.

[0003] Chinese patent application number 201710356996.3 discloses a lubrication structure for a motor, which realizes the recycling of lubricating oil. Although a large amount of leakage of lubricating oil is avoided, a small amount of lubricating oil still penetrates the gap between the inner oil seal and the rotating shaft and flows into the inside of the motor, causing waste of lubricating oil.

[0004] In view of the shortcomings of existing technologies, further improvements are needed. Utility Model Content

[0005] In view of this, the purpose of the present utility model is to provide a lubrication structure for a water-cooled YBZJ type motor to solve the above-mentioned problem.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a lubrication structure of a water-cooled YBZJ type motor, including an end cover, a motor shaft and an oil seal, a cylindrical extension portion is arranged on the right side of the end cover, and the end face of the oil seal has an annular boss, and the diameter of the annular boss is smaller than the diameter of the inner oil seal, the extension portion of the end cover is sleeved with the annular boss of the oil seal, and the motor shaft passes through the oil seal, a bearing is arranged between the end cover and the oil seal, the motor shaft is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the end cover, and the end cover is symmetrically arranged with an oil inlet channel and an oil outlet channel in a horizontal manner. The oil inlet channel and the oil outlet channel are connected through an external oil channel, and the lubricating oil is recycled through the external oil channel; and the entire oil circulation system can be powered by a compressor, a fan, etc.; an oil passage is arranged in the wall of the oil seal, and the left end port of the oil passage is connected with the oil outlet channel, and three annular comb tooth grooves, an annular oil return groove and an annular air pressure groove are arranged in sequence on the inner wall of the oil seal from left to right, and the comb tooth groove and the oil return groove are both connected with the oil passage, and annular grooves corresponding to the comb tooth grooves are arranged on the arc-shaped side surface of the motor bearing, and each annular groove is arranged opposite to the corresponding comb tooth groove.

[0007] The edge of the air pressure groove close to the motor shaft expands outward, and a pressure ring tube is concentrically distributed on the outer ring of the air pressure groove, and connecting tubes are evenly distributed between the pressure ring tube and the air pressure groove, one end of the connecting tube is connected to the pressure ring tube, and the other end of the connecting tube is connected to the air pressure groove, the left and right middle diameters of the pressure ring tube are larger than the cross-sectional diameters of the left and right ends, and L tubes are evenly distributed on the left side of the pressure ring tube, the right end of the L tube is connected to the pressure ring tube, and the left end of the L tube passes through the outer wall of the oil seal, the right end of the pressure ring tube leads to the intake fan, the blades of the intake fan are fixed in two concentric rings, and the large ring of the intake fan is rotatably sleeved on the right side of the oil seal, and the small ring of the intake fan is fixedly connected to the motor shaft.

[0008] Preferably, a sealing ring is provided between the extension portion of the end cover and the end face of the oil seal to achieve assembly of the end cover and the oil seal and ensure sealing to prevent oil leakage.

[0009] Preferably, an oblique through hole leading to the bearing is provided at the bottom end of the oil inlet channel, so that the lubricating oil can enter the contact part between the bearing, the oil seal and the motor shaft through the oblique through hole to perform lubrication work.

[0010] Preferably, the comb tooth grooves are arranged at intervals, and the depth and width of the comb tooth grooves close to the bearing are greater than the width and depth of other comb tooth grooves.

[0011] The beneficial effects of the utility model are as follows: when the lubricating oil flows into the oil seal and passes through the comb tooth groove, it is blocked layer by layer, and flows back to the oil outlet channel through the oil passage, and finally merges into the oil circuit circulation system, thereby realizing the recycling of the lubricating oil; and in addition, when the motor shaft rotates, it drives the air intake fan to rotate, and draws the outside air into the pressure ring tube, so that the pressure ring tube forms an air pressure that presses against the air pressure groove 11, and utilizes the air pressure in the air pressure groove to prevent a small amount of lubricating oil that penetrates the gap between the oil seal and the motor shaft from continuing to penetrate, thereby reducing the loss of lubricating oil during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the main structure diagram of the utility model.

[0013] Numbers in the figure: 1 end cover; 2 bearing; 3 motor shaft; 4 oil seal; 5 oil inlet channel; 6 oil outlet channel; 7 oil passage; 8 comb groove; 9 annular groove; 10 oil return groove; 11 air pressure groove; 12 pressure ring pipe; 13 L pipe; 14 intake fan. DETAILED DESCRIPTION

[0014] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0015] like Figure 1As shown, a lubrication structure of a water-cooled YBZJ type motor includes an end cover 1, a motor shaft 3 and an oil seal 4. A cylindrical extension is provided on the right side of the end cover 1, and the end face of the oil seal 4 has an annular boss, and the diameter of the annular boss is smaller than the diameter of the inner oil seal 4. The extension of the end cover 1 is sleeved with the annular boss of the oil seal 4, and the motor shaft 3 passes through the oil seal 4. A bearing 2 is provided between the end cover 1 and the oil seal 4. The motor shaft 3 is fixedly connected to the inner ring of the bearing 2, and the outer ring of the bearing 2 is fixedly connected to the end cover 2. The end cover 1 is symmetrically and horizontally provided with an oil inlet channel 5 and an oil outlet channel 6. The oil inlet channel 5 and the oil outlet channel 6 are The channel 6 is connected through an external oil circuit, and the lubricating oil is recycled through the external oil circuit; and the entire oil circuit circulation system can be powered by a compressor, a fan, etc.; an oil passage 7 is provided in the wall of the oil seal 4, and the left end port of the oil passage 7 is connected to the oil outlet channel 6. The inner wall of the oil seal 4 is provided with three annular comb grooves, an annular oil return groove 10 and an annular air pressure groove 11 from left to right, and the comb groove 8 and the oil return groove 10 are both connected to the oil passage 7. An annular groove 9 corresponding to the comb groove 8 is provided on the arc-shaped side surface of the motor bearing 3, and each annular groove 9 is arranged opposite to the corresponding comb groove 8.

[0016] In this embodiment, the air pressure groove 11 expands outward near the edge of the motor shaft 3, and a pressure ring tube 12 is concentrically distributed on the outer ring of the air pressure groove 11, and a connecting tube 13 is evenly distributed between the pressure ring tube 12 and the air pressure groove 11, one end of the connecting tube 13 is connected to the pressure ring tube 12, and the other end of the connecting tube 13 is connected to the air pressure groove, the left and right middle diameters of the pressure ring tube 12 are larger than the cross-sectional diameters of the left and right ends, and L tubes 13 are evenly distributed on the left side of the pressure ring tube 12, the right end of the L tube 13 is connected to the pressure ring tube 12, and the left end of the L tube 13 passes through the outer wall of the oil seal 4, the right end of the pressure ring tube 12 leads to the intake fan 14, the blades of the intake fan 14 are fixed in two concentric rings, and the large ring of the intake fan 14 is rotatably sleeved with the right side of the oil seal 4, and the small ring of the intake fan 14 is fixedly connected to the motor shaft 3.

[0017] In this embodiment, a sealing ring is provided between the extension portion of the end cover 1 and the end surface of the oil seal 4 to achieve assembly of the end cover 1 and the oil seal 4 and ensure sealing to prevent oil leakage.

[0018] In this embodiment, an oblique through hole is provided at the bottom of the oil inlet channel 5 leading to the bearing 2, so that the lubricating oil can enter the contact part between the bearing 2, the oil seal 4 and the motor shaft through the oblique through hole for lubrication.

[0019] In this embodiment, the comb-tooth grooves 8 are arranged at intervals, and the depth and width of the comb-tooth grooves 8 close to the bearing 2 are greater than the width and depth of other comb-tooth grooves.

[0020] Working principle of the utility model: when the utility model is in use, since the oil seal 4 and the motor shaft 3 rotate relative to each other, there is a gap between the two. Through the comb tooth groove 8, the lubricating oil flowing into the oil seal 4 is blocked layer by layer when passing through the comb tooth groove 8, and flows back to the oil outlet channel 6 through the oil passage 7, and finally merges into the oil circuit circulation system, so that the recycling of the lubricating oil is realized. In addition, when the motor shaft 3 rotates, it drives the air intake fan 14 to rotate, and draws the outside air into the pressure ring tube 12. Since the two ends of the pressure ring tube 12 shrink and the middle expands, according to the knowledge of fluid mechanics, the pressure in the middle of the pressure ring tube 12 is lower than the pressure at the two ends, that is, the pressure is pressed from the pressure ring tube 12 into the air pressure groove 11, and the air pressure in the air pressure groove 11 is used to prevent a small amount of lubricating oil that penetrates through the gap between the oil seal 4 and the motor shaft 3 from continuing to penetrate, thereby reducing the loss of lubricating oil during use.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lubrication structure of a water-cooled YBZJ type motor, comprising an end cover, a motor shaft and an oil seal, characterized in that: A cylindrical extension portion is provided on the right side of the end cover, and the end face of the oil seal has an annular boss, and the diameter of the annular boss is smaller than the diameter of the inner oil seal, the extension portion of the end cover is sleeved with the annular boss of the oil seal, and the motor shaft passes through the oil seal, a bearing is provided between the end cover and the oil seal, the motor shaft is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the end cover, the end cover is symmetrically and horizontally provided with an oil inlet channel and an oil outlet channel, the oil inlet channel and the oil outlet channel are connected through an external oil circuit, an oil passage is provided in the wall surface of the oil seal, and the left end port of the oil passage is connected with the oil outlet channel, three annular comb tooth grooves, an annular oil return groove and an annular air pressure groove are provided on the inner wall of the oil seal from left to right, the comb oil groove and the oil return groove are both connected with the oil passage, and an annular groove corresponding to the comb tooth groove one by one is provided on the arc-shaped side surface of the motor bearing, and each annular groove is arranged opposite to the corresponding comb tooth groove.

2. The lubrication structure of a water-cooled YBZJ motor according to claim 1 is characterized in that: The edge of the air pressure groove close to the motor shaft expands outward, and a pressure ring tube is concentrically distributed on the outer ring of the air pressure groove, and connecting tubes are evenly distributed between the pressure ring tube and the air pressure groove, one end of the connecting tube is connected to the pressure ring tube, and the other end of the connecting tube is connected to the air pressure groove, the left and right middle diameters of the pressure ring tube are larger than the cross-sectional diameters of the left and right ends, and L tubes are evenly distributed on the left side of the pressure ring tube, the right end of the L tube is connected to the pressure ring tube, and the left end of the L tube passes through the outer wall of the oil seal, the right end of the pressure ring tube leads to the intake fan, the blades of the intake fan are fixed in two concentric rings, and the large ring of the intake fan is rotatably sleeved on the right side of the oil seal, and the small ring of the intake fan is fixedly connected to the motor shaft.

3. The lubrication structure of a water-cooled YBZJ type motor according to claim 1, characterized in that: A sealing ring is arranged between the extension portion of the end cover and the end surface of the oil seal.

4. The lubrication structure of a water-cooled YBZJ type motor according to claim 1 is characterized in that: The bottom end of the oil inlet channel is provided with an oblique through hole leading to the bearing.

5. The lubrication structure of a water-cooled YBZJ motor according to claim 1, characterized in that: The comb tooth grooves are arranged at intervals, and the depth and width of the comb tooth grooves close to the bearing are greater than the width and depth of the other comb tooth grooves.

Images