A motor bearing lubrication device controlled by multi-cavity oil seals for hot rolling rollers

Abstract

The present invention discloses a motor bearing lubrication device controlled by a multi-cavity oil seal for a hot rolling roller, comprising a motor housing, a central shaft arranged in the motor housing, and a self-sealing waterproof structure arranged at the front end of the central shaft; the self-sealing waterproof structure comprises a front end cover, a front bearing, a front bearing outer cover, a front bearing inner cover, a water-spinning tray and a front cover plate; the front end cover is arranged at the front end of the motor housing, the inner ring of the front bearing is arranged on the central shaft, the outer ring of the front bearing is arranged in the front end cover, the front bearing outer cover is arranged at the front end of the front end cover, the front bearing inner cover is arranged at the rear end of the front end cover, the front cover plate is arranged at the front end of the front end cover, and the water-spinning tray is arranged on the central shaft and between the front bearing outer cover and the front cover plate. The present invention is to avoid the motor of the laminar roller from being worn due to lack of oil in the motor bearing and the motor winding being burned due to water inflow.

Description

Technical Field

[0001] The invention relates to a hot rolling process device, and more specifically to a motor bearing lubrication device controlled by a hot rolling roller multi-cavity oil seal. Background Art

[0002] The motor of the hot rolling roller is generally installed on the side of the laminar flow roller. During production, a large amount of cooling water flushes the outer shell of the motor handover. In order to prevent the cooling water from entering the inside of the motor, a combination of a water ring and a skeleton seal is installed. After the skeleton seal has been used for a period of time, there will be dry grinding between the lip of the skeleton seal and the motor output shaft due to lack of oil. If this phenomenon is not discovered in time, a circle of grooves will be formed on the output shaft of the motor after a period of time, causing the skeleton seal to fail, causing cooling water to enter the motor handover from the observation port of the motor handover, and enter the inside of the motor along the output shaft of the motor, causing the front bearing of the motor to be damaged due to lack of oil and the motor winding to be damaged due to water ingress, seriously affecting the service life of the motor and smooth production.

[0003] In existing patent applications, such as Chinese patent application No. 201610587918.X, a waterproof bearing is disclosed, including an inner ring, an outer ring, a retaining frame, and a steel ball disposed between the inner ring and the outer ring, characterized in that a first sealing structure is provided on one side of the steel ball, the sealing structure includes a water-swellable rubber ring and a steel ring disposed between the inner ring and the outer ring, the steel ring is disposed on the side of the inner ring close to the retaining frame, the inner circumferential surface of the water-swellable rubber ring is fixedly connected to the steel ring, and the outer circumferential surface of the water-swellable rubber ring is interference fit with the inner circumferential surface of the outer ring; a second sealing structure having the same structure as the first sealing structure is provided on the side of the steel ball facing away from the first sealing structure. The above patent technology relates to a waterproof bearing, which mainly adopts a first sealing structure provided on one side of a steel ball, and the sealing structure includes a water-swellable rubber ring and a steel ring disposed between the inner ring and the outer ring.

[0004] For example, Chinese patent application No. 201510617030.1 discloses a shaft water cooling structure, in which half shaft one and half shaft two are connected by a connecting pin; a center hole is set in the half shaft two, a horizontal guide pipe is set in the center hole, and the two ends of the horizontal guide pipe are fixed in the center hole through a support sleeve and a transition sleeve; the transition sleeve is also provided with a waterproof bearing, one end of the inner tube is fixed on the waterproof bearing, and the other end is connected to the water inlet on the water tank shell; the inner tube is connected with the horizontal guide pipe; a water outlet is set at the end of the horizontal guide pipe away from the inner tube; uniformly distributed small holes are set on the end face of the support sleeve; the cooling water flowing out of the water outlet flows into the water tank shell through the gap between the support sleeve, the inner tube and the center hole, and finally flows out from the water outlet of the water tank shell; the hole retaining ring is set at the end of the waterproof bearing near the water inlet. The present invention has the advantage of reducing the temperature rise of the motor winding, rotor cage bar, and bearing for small-volume and large-power motors. The above patent technology relates to a shaft water cooling structure, whose main function involves bearing temperature control, and the structure adopts a horizontal guide pipe design.

[0005] This patent involves the use of multi-cavity oil seal control, which not only ensures the lubrication of the skeleton seal and the front bearing of the motor, but also realizes the front sealing under complex on-site environments. Therefore, there is a significant difference in structure between this and the above two existing patents. Summary of the invention

[0006] In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a motor bearing lubrication device controlled by a multi-cavity oil seal of a hot rolling roller table, so as to avoid faults such as lack of oil wear of the motor bearings and burning of the motor windings due to water ingress in the laminar flow roller table motor.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A motor bearing lubrication device controlled by a multi-cavity oil seal for a hot rolling roller table, comprising a motor housing, a central shaft arranged in the motor housing and horizontally along the axis of the motor housing, and a self-sealing waterproof structure arranged at the front end of the central shaft;

[0009] The self-sealing waterproof structure comprises a front end cover, a front bearing, a front bearing outer cover, a front bearing inner cover, a water-spraying tray and a front cover plate;

[0010] The front end cover is arranged at the front end position of the motor housing, the inner ring of the front bearing is arranged on the middle shaft, the outer ring of the front bearing is arranged inside the front end cover, the front bearing outer cover is arranged at the front end position of the front end cover, the front bearing inner cover is arranged at the rear end position of the front end cover, the front cover plate is arranged at the front end position of the front end cover, and the water-spraying tray is arranged on the middle shaft and located between the front bearing outer cover and the front cover plate;

[0011] Sealing rings are provided between the front end cover and the front bearing outer cover, between the front end cover and the front bearing inner cover, and between the front bearing inner cover and the middle shaft;

[0012] The front end cover is provided with a refueling port, the front bearing outer cover and the front bearing inner cover are both provided with cavities, and the refueling port is connected with the two cavities;

[0013] A water channel and a drainage groove are provided between the water-spraying plate and the front bearing outer cover, and the water channel is communicated with the drainage groove.

[0014] Preferably, a rear end cover is provided at the rear end of the motor housing, and a rear bearing is provided at the rear end of the central shaft;

[0015] The inner ring of the rear bearing is arranged on the middle shaft, and the outer ring of the rear bearing is arranged in the rear end cover;

[0016] A rear cover plate is arranged at the rear end position of the rear end cover.

[0017] Preferably, a rotor is disposed on the central shaft, a stator is disposed in the motor housing, and the rotor cooperates with the stator.

[0018] Preferably, two layers of sealing rings are provided between the front end cover and the front bearing outer cover.

[0019] Preferably, a layer of the sealing ring is provided between the front end cover and the front bearing inner cover.

[0020] Preferably, a shaft sleeve is provided on the central shaft, and a sealing ring is provided between the shaft sleeve and the front bearing outer cover.

[0021] Preferably, a skeleton oil seal is provided in each of the cavities.

[0022] Preferably, the refueling port is connected to the two cavities through a refueling oil passage.

[0023] Preferably, the refueling port is opened at the upper part of the front end cover, and a drain port is opened at the lower part of the front end cover.

[0024] The motor bearing lubrication device controlled by a multi-cavity oil seal of a hot rolling roller provided by the present invention also has the following beneficial effects:

[0025] 1) The motor bearing lubrication device of the present invention adopts multi-cavity oil seal control, which ensures the lubrication of the skeleton oil seal and the front bearing while also realizing the front sealing under the on-site responsible environment;

[0026] 2) The motor bearing lubrication device of the present invention is combined with the front bearing oil replenishment on site periodically, which improves the lubrication state between the lip of the skeleton oil seal and the motor output shaft, prolongs the service life of the skeleton seal, and ensures the waterproof performance of the front part of the motor;

[0027] 3) After the external water is formed in the cavity of the front end cover, it is discharged through the drain port of the motor bearing lubrication device of the present invention, so as not to enter the interior of the motor, thereby ensuring the operating state and life of the front bearing in the motor. More importantly, after the external water does not enter the interior of the motor, the insulation of the motor winding is ensured;

[0028] 4) The drainage groove of the motor bearing lubrication device of the present invention can prevent water vapor from accumulating in the sealing ring and penetrating into the skeleton oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the motor bearing lubrication device of the present invention;

[0030] Figure 2 yes Figure 1 A magnified schematic diagram of position B in the middle;

[0031] Figure 3 It is a structural schematic diagram of the front bearing outer cover in the motor bearing lubrication device of the present invention;

[0032] Figure 4 yes Figure 3 Schematic cross-sectional view along the AA direction;

[0033] Figure 5 It is a structural schematic diagram of the front bearing inner cover in the motor bearing lubrication device of the present invention;

[0034] Figure 6 yes Figure 5 Schematic cross-sectional view along CC direction. DETAILED DESCRIPTION

[0035] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0036] Please combine Figure 1 As shown, the present invention provides a motor bearing lubrication device controlled by a multi-cavity oil seal for a hot rolling roller table, comprising a motor housing 1, a central shaft 2 installed in the motor housing 1 and arranged horizontally along the axis of the motor housing 1, Figure 1 The left side is the front end (towards the motor output shaft), and the right side is the rear end (towards the wiring position), and also includes a self-sealing waterproof structure installed at the front end position of the central axis 2.

[0037] The self-sealing waterproof structure comprises a front end cover 3, a front bearing 4, a front bearing outer cover 5, a front bearing inner cover 6, a water-spraying tray 7 and a front cover plate 8.

[0038] The front end cover 3 is fixed to the front end position of the motor housing 1 by bolts, the inner ring of the front bearing 4 is fixed to the corresponding position of the middle shaft 2 by interference fit, and the outer ring of the front bearing 4 is fixed in the front end cover 3 by interference fit.

[0039] The front bearing outer cover 5 is fixed to the front end position of the front end cover 3 by bolts, and two layers of sealing rings 22 are arranged between the front bearing outer cover 5 and the front end cover 3 .

[0040] The front bearing inner cover 6 is fixed to the rear end position of the front end cover 3 by bolts. A sealing ring 23 is provided between the front bearing inner cover 6 and the front end cover 3 , and a sealing ring 25 is provided between the front bearing inner cover 6 and the middle shaft 2 .

[0041] The shaft sleeve 9 is inserted into the corresponding position of the middle shaft 2 by interference fit, and a sealing ring 24 is arranged between the shaft sleeve 9 and the front bearing outer cover 5 .

[0042] The front cover plate 8 is fixed to the front end position of the front end cover 3 by means of bolts.

[0043] The water-spraying tray 7 forms an interference fit with the central shaft 2 and is fixed to the central shaft 2 by screws. The water-spraying tray 7 rotates with the central shaft 2 and is located between the front bearing outer cover 5 and the front cover plate 8 .

[0044] A rear end cover 10 is fixed to the rear end of the motor housing 1 by bolts, and a rear bearing 11 is installed at the rear end of the middle shaft 3 .

[0045] The inner ring of the rear bearing 11 is fixed on the middle shaft 2 by interference fit, and the outer ring of the rear bearing 11 is fixed in the rear end cover 10 by interference fit;

[0046] A rear cover plate 12 is fixed to the rear end of the rear cover 10 by means of bolts.

[0047] A rotor 13 is installed on the central shaft 2 , and a stator 14 is installed in the motor housing. The rotor 13 cooperates with the stator 14 .

[0048] Please combine Figures 2 to 6 As shown, a refueling port 15 is provided on the upper portion of the front end cover 3, and cavities 16 are provided on the front bearing outer cover 5 and the front bearing inner cover 6. The refueling port 15 is connected to the two cavities 16 through a refueling oil passage 17, and skeleton oil seals 18 are installed in the two cavities 16.

[0049] A drain port 19 is provided at the lower portion of the front end cover 3 .

[0050] A water channel 20 and a drainage groove 21 are provided between the water-spraying tray 7 and the front bearing outer cover 5 , and the water channel 20 is communicated with the drainage groove 21 .

[0051] Lubricating oil is added from the refueling port 15 on the upper part of the front end cover 3, and flows into the two cavities 16 through the refueling oil passage 17. The two cavities 16 are sealed by the skeleton oil seal 18. There are three layers of sealing rings 22 and 23 on the outside of the skeleton oil seal 18 to prevent water vapor from entering and hydraulic oil leakage. External water vapor flows in along the joint of the middle shaft 2, and the water-spinning plate 7 rotates at high speed with the middle shaft 2. After the water vapor hits the water-spinning plate 7, it is thrown out due to centrifugal action and flows out of the motor through the lower drain port 19. The water channel 20 between the water-spinning plate 7 and the front bearing outer cover 5 can throw part of the water vapor that rebounds into the water-spinning plate 7 and the front bearing outer cover 5 out again through the rotating water-spinning plate 7. A part of the water vapor passing through the water channel 20 will be blocked by the sealing ring 24 between the front bearing outer cover 5 and the shaft sleeve 9, and discharged through the lower drainage groove 21 to prevent water vapor from accumulating in the sealing ring 24 and penetrating into the skeleton oil seal 18.

[0052] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A motor bearing lubrication device controlled by a multi-cavity oil seal for a hot rolling roller table, comprising a motor housing, and a central shaft disposed in the motor housing and horizontally arranged along the axis of the motor housing, characterized in that: It also includes a self-sealing waterproof structure disposed at the front end of the central axis; The self-sealing waterproof structure comprises a front end cover, a front bearing, a front bearing outer cover, a front bearing inner cover, a water-spraying tray and a front cover plate; The front end cover is arranged at the front end position of the motor housing, the inner ring of the front bearing is arranged on the middle shaft, the outer ring of the front bearing is arranged inside the front end cover, the front bearing outer cover is arranged at the front end position of the front end cover, the front bearing inner cover is arranged at the rear end position of the front end cover, the front cover plate is arranged at the front end position of the front end cover, and the water-spraying tray is arranged on the middle shaft and located between the front bearing outer cover and the front cover plate; Sealing rings are provided between the front end cover and the front bearing outer cover, between the front end cover and the front bearing inner cover, and between the front bearing inner cover and the middle shaft; The front end cover is provided with a refueling port, the front bearing outer cover and the front bearing inner cover are both provided with cavities, the refueling port is connected with the two cavities through a refueling oil passage, and a skeleton oil seal is provided in each of the cavities; A water channel and a drainage groove are provided between the water-spraying plate and the front bearing outer cover, and the water channel is connected to the drainage groove. The refueling port is opened at the upper part of the front end cover, and a drain port is opened at the lower part of the front end cover. Two layers of sealing rings are provided between the front end cover and the front bearing outer cover. A sealing ring is provided between the front end cover and the front bearing inner cover. A shaft sleeve is arranged on the middle shaft, and a sealing ring is arranged between the shaft sleeve and the front bearing outer cover.

2. The motor bearing lubrication device controlled by multi-cavity oil seals for hot rolling rollers according to claim 1 is characterized in that: A rear end cover is provided at the rear end of the motor housing, and a rear bearing is provided at the rear end of the middle shaft; The inner ring of the rear bearing is arranged on the middle shaft, and the outer ring of the rear bearing is arranged in the rear end cover; A rear cover plate is arranged at the rear end position of the rear end cover.

3. The motor bearing lubrication device controlled by multi-cavity oil seals for hot rolling rollers according to claim 1 is characterized in that: A rotor is arranged on the central shaft, a stator is arranged in the motor housing, and the rotor cooperates with the stator.

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