CN109281797B - Hollow motor for high-pressure water removal - Google Patents
Hollow motor for high-pressure water removal Download PDFInfo
- Publication number
- CN109281797B CN109281797B CN201811358748.3A CN201811358748A CN109281797B CN 109281797 B CN109281797 B CN 109281797B CN 201811358748 A CN201811358748 A CN 201811358748A CN 109281797 B CN109281797 B CN 109281797B
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- hollow
- motor
- shell
- ring
- driving shaft
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 89
- 239000003921 oil Substances 0.000 claims description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 210000004907 gland Anatomy 0.000 claims description 18
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 239000010687 lubricating oil Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000005507 spraying Methods 0.000 abstract description 10
- 239000004519 grease Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C2/00—Rotary-piston engines
- F03C2/08—Rotary-piston engines of intermeshing-engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
Abstract
The hollow motor for removing the high-pressure water comprises a power driving part at the lower side and a rotary sealing part arranged at the upper side of the power driving part; the power driving part comprises a motor seat, a hollow driving shaft, a motor shell, a motor cover plate, a driving gear and a floating side plate. The invention adopts the principle of hydraulic motor driving, integrates a component, overcomes the characteristics of easy damage of the structure and low rotation speed, can lead the rotation speed of the cross-shaped rotary water spraying device to reach 3000r/min, and is used as an independent component to independently drive the cross-shaped rotary water spraying device to work, has simple structure and can greatly simplify the structure for the working condition of parallel work of a plurality of cross-shaped rotary water spraying devices.
Description
Technical Field
The invention belongs to the technical field of high-pressure water removal, and particularly relates to a hollow motor for high-pressure water removal.
Background
At present, the main structure of the trolley for the domestic high-pressure water cleaning vehicle is that a driving motor which is vertically arranged drives a hollow driving shaft to drive a rotary sealing connecting device at the upper side and a cross-shaped rotary water spraying device at the lower side to rotate through a belt (the specific structure is shown in the patent of the invention with publication number CN 105887637A). Although the structure can well meet the working condition of use, the structure also has a plurality of defects as follows:
1. the structure is complex. The working device consists of a driving motor, a driving belt pulley, a driven belt pulley, a belt, a hollow driving shaft, a rotary sealing connecting device, an upper bearing seat, a lower bearing seat, an upper bearing, a lower bearing, a connecting clamp and the like, and has a complex structure and heavy weight.
2. The rotation speed is low. Because the axial length of the structure is long, the rotary sealing connecting device is easy to shake when in high speed, and the joint of the rotary sealing connecting device and the excessive hollow driving shaft is easy to damage, the structure can only enable the rotation speed of the cross joint to reach 900-1200r/min, the rotation speed is low, and the structure is not applicable to certain working conditions requiring high-rotation speed rotation, such as 3000r/min working conditions required by an airport photoresist remover.
3. And is unfavorable for the simultaneous working of a plurality of cross-shaped rotary water spraying devices. In order to increase the width of the clean line, a plurality of cross joints need to be arranged to work in parallel, so that the structure is more complex.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides the hollow motor for cleaning high-pressure water, which has the advantages of compact structure, small volume, high rotation speed and strong stability.
In order to solve the technical problems, the invention adopts the following technical scheme: the hollow motor for removing the high-pressure water comprises a power driving part at the lower side and a rotary sealing part arranged at the upper side of the power driving part;
The power driving part comprises a motor seat, a hollow driving shaft, a motor shell, a motor cover plate, a driving gear and a floating side plate, wherein the motor shell is arranged on the motor seat, the motor cover plate is arranged at the top of the motor shell, the hollow driving shaft vertically penetrates through the motor seat, the motor shell and the motor cover plate, the driving gear and the floating side plate are arranged in the motor shell, the central line of the driving gear is parallel to the hollow driving shaft, a driven gear meshed with the driving gear is arranged on the hollow driving shaft, the driving gear and the hollow driving shaft are supported in the floating side plate through sliding bearing bushes, an oil inlet corresponding to the meshing part of the driving gear and the driven gear is formed in the front side of the motor shell, an oil outlet corresponding to the meshing part of the driving gear and the driven gear is formed in the rear side of the motor shell, a first central limiting sealing assembly is arranged between the lower part of the hollow driving shaft and the motor seat, and the upper part of the hollow driving shaft is rotationally connected to the inside of the rotary sealing part through a second central limiting sealing assembly and a third central limiting sealing assembly.
The motor seat is connected with the motor shell through a locating pin and a first fastening bolt, a first sealing ring is arranged between the upper end face of the motor seat and the lower end face of the motor shell, and a second sealing ring is arranged between the upper end face of the motor shell and the lower surface of the motor cover plate.
The first central limiting sealing assembly comprises a duplex angular contact bearing and a gland, the hollow driving shaft is rotationally connected with the motor seat through the duplex angular contact bearing, the gland is sleeved outside the hollow driving shaft and is arranged at the bottom of the motor seat through a second fastening bolt, a third sealing ring is arranged between the upper surface of the gland and the bottom of the motor seat, the lower portion of the hollow driving shaft is in threaded connection with a first pressing sleeve, the lower end of the first pressing sleeve is in pressing fit with the inner ring of the duplex angular contact bearing, the upper end of the gland is in pressing fit with the outer ring of the duplex angular contact bearing, and a first oil seal is arranged between the inner ring of the gland and the outer circumference of the first pressing sleeve.
The rotary sealing part comprises an upper transparent hollow shell and a lower transparent hollow shell, the bottom of the hollow shell is connected with a motor cover plate through a third fastening bolt, the top of the hollow shell is connected with a shell cover through a fourth fastening bolt, a pipe joint is arranged at the inner upper part of the shell cover, a threaded connection upper pressing cap is arranged at the outer part of the shell cover, an upper convex ring which is pressed between the top end of the shell cover and the bottom surface of the upper pressing cap is integrally arranged at the outer part of the pipe joint, a supporting ring is arranged at the middle part of the inner wall of the shell cover, a copper sleeve is arranged on the supporting ring in the shell cover, the upper part of the copper sleeve stretches into the inner lower part of the pipe joint, a hollow connecting shaft is arranged inside the copper sleeve, a filling sealing ring which is arranged at the upper part of the copper sleeve is arranged between the outer circle of the upper part of the hollow connecting shaft and the inner wall of the pipe joint, a first O-shaped sealing ring is arranged between the outer periphery of the filling sealing ring and the inner ring of the pipe joint, the aperture of a high-pressure water hole in the pipe joint is larger than the inner diameter of the filling sealing ring, the pressing surface of the filling sealing ring lower end and the copper sleeve is of a conical structure which is thick and thin down, the upper pressing surface of the hollow driving shaft upper end stretches into the shell cover and is positioned below the supporting ring, the hollow connecting shaft lower end is integrally, the hollow connecting shaft stretches into the upper end of the hollow connecting shaft, the hollow connecting shaft is integrally arranged at the hollow connecting shaft, the hollow connecting shaft is connected with the hollow upper end and the hollow connecting shaft, and the hollow sealing shaft is connected by the hollow pipe upper end, and the hollow sealing cap, and the hollow sealing pipe.
The second center limiting seal assembly is located the third center limiting seal assembly below, the second center limiting seal assembly is including installing at hollow drive epaxial angular contact bearing, first retaining ring and second oil blanket, the mounting groove has been seted up on the motor apron, the second oil blanket is located the mounting groove bottom, first retaining ring setting is in the mounting groove and is located second oil blanket upper portion, angular contact bearing's inner circle and hollow drive shaft excircle interference fit, angular contact bearing's outer lane and hollow casing's inner wall lower part contact fit.
The third central limiting sealing assembly comprises a second check ring, a third oil seal and a second pressing sleeve which are sleeved on the hollow driving shaft, the second pressing sleeve is in threaded connection with the hollow driving shaft, the lower end of the second pressing sleeve is in contact with the upper end of the angular contact bearing, the third oil seal is arranged on the outer ring of the second pressing sleeve, a spacer which separates the inner cavity of the hollow shell into an upper cavity and a lower cavity is arranged between the outer ring of the third oil seal and the inner wall of the hollow shell, a second O-shaped sealing ring is arranged between the periphery of the spacer and the inner wall of the hollow shell, and the second check ring is arranged on the inner wall of the hollow shell and is positioned on the upper part of the spacer.
The side part of the hollow shell is provided with a lubricating oil hole positioned above the angular contact bearing, and an oil nozzle is arranged in the lubricating oil hole.
An upper water outlet positioned on the outer side of the lower part of the copper sleeve is arranged on the side part of the shell cover.
The upper side part of the lower pressing cap is provided with a lower inner water outlet, and the side part of the hollow shell is provided with a lower outer water outlet positioned at the upper part of the second retaining ring.
The side part of the pipe joint is provided with an overflow port above the upper convex ring.
By adopting the technical scheme, the rotary power is driven by hydraulic pressure, namely, the oil inlet and the oil outlet are connected with a hydraulic pipeline and an oil pump, when hydraulic oil passes through the inside of the motor shell, the driving gear rotates at a high speed, the driving gear drives the driven gear meshed with the driving gear to rotate, the hollow driving shaft integrated with the driven gear also rotates at a high speed, and the hollow driving shaft drives the cross-shaped rotary water spraying device connected with the lower end to rotate at a high speed, so that the hollow connecting shaft also rotates along with the hollow driving shaft. The hydraulic motor structure of the integrated structure replaces the structure of the prior transitional hollow driving shaft driven by the driving motor through a belt, thereby meeting the working condition.
Meanwhile, high-pressure water enters from the upper port of the pipe joint through the high-pressure hose joint, and water seepage phenomenon (the phenomenon belongs to a normal phenomenon) occurs when the sealing part of the pipe joint and the high-pressure hose joint works, so that the overflow port formed at the side part of the pipe joint can ensure the tightness of threaded connection, and water seeping from the joint part of the pipe joint and the high-pressure hose joint flows out from the overflow port.
The high-pressure water then enters the hollow connecting shaft, the outer side of the hollow connecting shaft is matched with the filling sealing ring, the outer side of the hollow connecting shaft is in extremely small clearance fit with the filling sealing ring, the outer circle of the filling sealing ring is sealed with the inner wall of the pipe joint by the first O-shaped sealing ring, the first O-shaped sealing ring outside the filling sealing ring is also in leakage phenomenon, an upper water outlet is formed at the lower part of the pipe joint and used for discharging the high-pressure water, the high-pressure water generates extremely strong pressure on the upper end face of the filling sealing ring when the high-pressure water passes through water seepage between the outer wall of the filling sealing ring and the inner wall of the pipe joint and works, the filling sealing ring is tightly pressed on the copper sleeve, the lower end of the filling sealing ring and the upper end of the copper sleeve are of an upper thick conical structure, the conical lip at the lower end of the filling sealing ring is tightly clamped to the outer circle of the hollow connecting shaft at high pressure, the hollow connecting shaft is rotated at high speed when the hollow connecting shaft works, extremely small air sealing is formed between the inner walls of the filling sealing ring and the copper sleeve and the outer wall of the hollow connecting shaft, and extremely little water flows into the upper cavity when the working (normally phenomenon) and the leaked water flows out from the lower water outlet.
The lower bulge loop of hollow connecting axle excircle is closely compressed tightly on hollow drive shaft by pushing down the cap, lean on the centre locating hole of hollow drive shaft to guarantee coaxial point position, hollow connecting axle and hollow drive shaft coaxial high-speed operation together simultaneously promptly, the conical face of upper and lower thickness is for hollow connecting axle lower extreme, conical face and the inside annular step crimping seal of hollow drive shaft, this seal also can have leakage phenomenon (normal phenomenon), the water that oozes can flow from pushing down the lower interior delivery port of cap upside down, prevent to pushing down the screw thread seal of cap and forming pressure, the overflow water that has collected in the upper chamber, finally flow through the mouth of a river that goes out down.
The upper end face of the hollow connecting shaft can form pressure of about 150Kgf by high-pressure water, the acting force can be transmitted to a driven gear part of the hollow driving shaft, and the driven gear can not bear axial force, so that bearings are respectively arranged on the upper side and the lower side of the hollow driving shaft. Other forms of support structure can be used to counteract the axial force of the high pressure water on the hollow drive shaft, the thrust of the upper high pressure water can directly act on the motor cover plate, and the thrust of the lower part can act on the motor seat, so that the structure can not have any influence on the driven gear, and the driving gear and the driven gear can be well meshed.
And injecting lubricating grease into the lubricating oil hole to lubricate the angular contact bearing.
In summary, the invention replaces the driving motor, the driving and driven belt pulley, the belt, the transitional hollow driving shaft, the rotary sealing connecting device, the upper and lower bearing blocks, the upper and lower bearings, the connecting clamp and other structures of the CN 105887637A patent in the structure. The invention adopts the principle of hydraulic motor driving, integrates a component, overcomes the characteristics of easy damage of the structure and low rotation speed, can lead the rotation speed of the cross-shaped rotary water spraying device to reach 3000r/min, and is used as an independent component to independently drive the cross-shaped rotary water spraying device to work, has simple structure and can greatly simplify the structure for the working condition of parallel work of a plurality of cross-shaped rotary water spraying devices.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a cross-sectional view A-A of fig. 1.
Detailed Description
As shown in fig. 1 and 2, the hollow motor for high-pressure water removal of the present invention includes a power driving part at a lower side and a rotary sealing part provided at an upper side of the power driving part.
The power driving part comprises a motor seat 1, a hollow driving shaft 2, a motor shell 3, a motor cover plate 4, a driving gear 5 and a floating side plate 6, wherein the motor shell 3 is arranged on the motor seat 1, the motor cover plate 4 is arranged at the top of the motor shell 3, the hollow driving shaft 2 vertically penetrates through the motor seat 1, the motor shell 3 and the motor cover plate 4, the driving gear 5 and the floating side plate 6 are arranged in the motor shell 3, the center line of the driving gear 5 is parallel to the hollow driving shaft 2, a driven gear 41 meshed with the driving gear 5 is arranged on the hollow driving shaft 2, the driving gear 5 and the hollow driving shaft 2 are supported in the floating side plate 6 through a sliding bearing bush 7, an oil inlet 42 corresponding to the meshing part of the driving gear 5 and the driven gear 41 is formed in the front side of the motor shell 3, an oil outlet 43 corresponding to the meshing part of the driving gear 5 and the driven gear 41 is formed in the rear side of the motor shell 3, a first center limiting sealing assembly is arranged between the lower part of the hollow driving shaft 2 and the motor seat 1, and the upper part of the hollow driving shaft 2 is rotationally connected to the inside of a rotary sealing part through a second center limiting sealing assembly and a third center limiting sealing assembly.
The motor seat 1 is connected with the motor housing 3, the motor housing 3 is connected with the motor cover plate 4 through a positioning pin 11 and a first fastening bolt 10, a first sealing ring 8 is arranged between the upper end face of the motor seat 1 and the lower end face of the motor housing 3, and a second sealing ring 9 is arranged between the upper end face of the motor housing 3 and the lower surface of the motor cover plate 4.
The first central limiting seal assembly comprises a double-joint angular contact bearing 12 and a gland 14, the hollow driving shaft 2 is rotationally connected with the motor seat 1 through the double-joint angular contact bearing 12, the gland 14 is sleeved outside the hollow driving shaft 2 and is arranged at the bottom of the motor seat 1 through a second fastening bolt 44, a third sealing ring 16 is arranged between the upper surface of the gland 14 and the bottom of the motor seat 1, the lower portion of the hollow driving shaft 2 is in threaded connection with a first gland 36, the lower end of the first gland 36 is in jacking fit with the inner ring of the double-joint angular contact bearing 12, the upper end of the gland 14 is in jacking fit with the outer ring of the double-joint angular contact bearing 12, and a first oil seal 15 is arranged between the inner ring of the gland 14 and the outer circumference of the first gland 36.
The rotary sealing part comprises an upper hollow shell 19 and a lower hollow shell 19, the bottom of the hollow shell 19 is connected with a motor cover plate 4 through a third fastening bolt 45, the top of the hollow shell 19 is connected with a shell cover 20 through a fourth fastening bolt 46, a pipe joint 25 is arranged at the upper part in the shell cover 20, an upper press cap 26 which is connected with the outside of the shell cover 20 through threads is sleeved outside the pipe joint 25, an upper convex ring 47 which is pressed between the top end of the shell cover 20 and the bottom surface of the upper press cap 26 is integrally arranged outside the pipe joint 25, a supporting ring 48 is arranged in the middle of the inner wall of the shell cover 20, a copper sleeve 28 is arranged on the supporting ring 48 in the shell cover 20, the upper part of the copper sleeve 28 stretches into the lower part in the pipe joint 25, a hollow connecting shaft 21 is arranged in the copper sleeve 28, a filling sealing ring 27 is arranged between the outer circle at the upper part of the hollow connecting shaft 21 and the inner wall of the pipe joint 25, a first O-shaped sealing ring 35 is arranged between the outer periphery of the filling sealing ring 27 and the inner circle of the pipe joint 25, the high-pressure water hole inside the pipe joint 25 has a larger diameter than the inner diameter of the filling sealing ring 27, so that the high-pressure water can generate downward pressure on the filling sealing ring 27, the upper end and the copper sleeve 28 stretches into the hollow shaft 2, the upper end of the hollow shaft sleeve 28 is connected with the hollow shaft 2, the upper end of the hollow shaft 2 is connected with the hollow shaft 2, the upper end of the hollow cap 22 is connected with the hollow shaft 2, and the hollow shaft 2 is connected with the hollow shaft 2, the hollow end of the hollow cap 21 is connected with the hollow cap 2, and the hollow end of the hollow cap 2 is connected with the hollow end 2, and the hollow end part is connected with the hollow end 2.
The second center limiting seal assembly is located the third center limiting seal assembly below, the second center limiting seal assembly is including installing angular contact bearing 13, first retaining ring 18 and the second oil blanket 17 on hollow drive shaft 2, the mounting groove has been seted up on the motor apron 4, second oil blanket 17 is located the mounting groove bottom, first retaining ring 18 sets up in the mounting groove and is located second oil blanket 17 upper portion, angular contact bearing 13's inner circle and hollow drive shaft 2 excircle interference fit, angular contact bearing 13's outer lane and hollow casing 19's inner wall lower part contact fit.
The third central limiting seal assembly comprises a second retainer ring 32, a third oil seal 33 and a second pressing sleeve 23 which are sleeved on the hollow driving shaft 2, the second pressing sleeve 23 is in threaded connection with the hollow driving shaft 2, the lower end of the second pressing sleeve 23 is in contact with the upper end of the angular contact bearing 13, the third oil seal is arranged on the outer ring of the second pressing sleeve 23, a spacer 24 for separating the inner cavity of the hollow shell 19 into an upper cavity 31 and a lower cavity 30 is arranged between the outer ring of the third oil seal 33 and the inner wall of the hollow shell 19, a second O-shaped sealing ring 34 is arranged between the outer periphery of the spacer 24 and the inner wall of the hollow shell 19, and the second retainer ring 32 is arranged on the inner wall of the hollow shell 19 and is positioned on the upper part of the spacer 24.
The side of the hollow shell 19 is provided with a lubricating oil hole above the angular contact bearing 13, and a nozzle 29 is arranged in the lubricating oil hole.
The oil nozzle 29 is taken out, and an upper water outlet 38 positioned on the outer side of the lower part of the copper sleeve 28 is formed on the side part of the shell cover 20.
The upper side of the lower pressing cap 22 is provided with a lower inner water outlet 39, and the side of the hollow shell 19 is provided with a lower outer water outlet 40 positioned at the upper part of the second retainer ring 32.
The side of the pipe joint 25 is provided with an overflow 37 above the upper collar 47.
The rotary power in the invention is driven by hydraulic pressure, namely, an oil inlet 42 and an oil outlet 43 are connected with a hydraulic pipeline and an oil pump, when hydraulic oil passes through the inside of a motor shell 3, a driving gear 5 rotates at a high speed, the driving gear 5 drives a driven gear 41 meshed with the driving gear 5 to rotate, a hollow driving shaft 2 integrated with the driven gear 41 also rotates at a high speed, the hollow driving shaft 2 drives a cross-shaped rotary water spraying device connected with the lower end to rotate at a high speed, and a hollow connecting shaft 21 also rotates along with the hollow driving shaft 2. The hydraulic motor structure of the integrated structure replaces the existing structure of the transition hollow driving shaft 2 driven by the driving motor through a belt, and meets the working condition.
At the same time, high pressure water enters from the upper port of the pipe joint 25 through the high pressure hose joint 25, and the sealing portion of the pipe joint 25 and the high pressure hose joint 25 is operated with a water seepage phenomenon (this phenomenon is a normal phenomenon), and in order to secure the tightness of the screw connection, an overflow port 37 is provided at the side of the pipe joint 25, and water seeping at the joint of the pipe joint 25 and the high pressure hose joint 25 flows out from the overflow port.
The high-pressure water then enters the hollow connecting shaft 21, the outer side of the hollow connecting shaft 21 is matched with the filling sealing ring 27, a very small clearance fit is formed between the outer side of the hollow connecting shaft 21 and the filling sealing ring 27, the outer circle of the filling sealing ring 27 is sealed with the inner wall of the pipe joint 25 by the first O-shaped sealing ring 35, the first O-shaped sealing ring outside the filling sealing ring 27 also has a leakage phenomenon, the side part of the shell cover 20 is provided with an upper water outlet 38 at the lower part of the pipe joint 25, the high-pressure water is used for discharging the high-pressure water, when the high-pressure water passes through water seepage between the outer wall of the filling sealing ring 27 and the inner wall of the pipe joint 25 and works, the high-pressure water generates extremely strong pressure on the upper end face of the filling sealing ring 27, the filling sealing ring 27 is tightly pressed on the copper sleeve 28, the lower end of the filling sealing ring 27 and the upper end of the copper sleeve 28 are of a conical structure with the upper part thick upper part and the lower part, the conical lip of the lower end of the filling sealing ring 27 is contracted towards the middle to be tightly fastened to the outer circle of the hollow connecting shaft 21 under high pressure, the high-speed rotation of the hollow connecting shaft 21 is formed, the hollow connecting shaft 21 forms a very small air seal between the inner wall of the filling sealing ring 27 and the inner wall of the copper sleeve 28 and the inner wall of the hollow connecting shaft 21 when the copper sleeve 25 is works, and very small water seepage phenomenon exists when the high-pressure water flows out from the upper water outlet 31 to the lower water outlet normally flows out from the upper water outlet 31 to the lower water outlet 31.
The lower convex ring 49 of the outer circle of the hollow connecting shaft 21 is tightly pressed on the hollow driving shaft 2 by the pressing cap 22, a coaxial point position is ensured by the middle positioning hole of the hollow driving shaft 2, namely, the hollow connecting shaft 21 and the hollow driving shaft 2 are coaxial and simultaneously run together at high speed, the lower end of the hollow connecting shaft 21 is a conical surface with the upper part thick and the lower part thin, the conical surface is in pressure connection with the annular step inside the hollow driving shaft 2, the sealing can also have a leakage phenomenon (normal phenomenon), the exuded water can flow out from the lower inner water outlet 39 on the upper side of the pressing cap 22, the pressure is prevented from forming on the thread sealing of the pressing cap 22, and the overflowed water collected in the upper cavity 31 finally flows out through the lower outlet 40.
The high pressure water forms a pressure of about 150Kgf on the upper end surface of the hollow connecting shaft 21, the acting force is transferred to the driven gear 41 of the hollow driving shaft 2, and the driven gear 41 cannot bear axial force, so that bearings are respectively arranged on the upper side and the lower side of the hollow driving shaft 2, in this example, an angular contact ball bearing is used on the upper part, a duplex angular contact bearing 1312 is used for supporting the lower part, and the axial direction of the structure is axially locked and positioned by the second pressing sleeve 23 and the first pressing sleeve 36, so that the structure is adopted to offset the axial acting force of the high pressure water. Other forms of support structure can be used to counteract the axial force of the high pressure water on the hollow drive shaft 2, the thrust of the upper high pressure water will act directly on the motor cover plate 4, and the lower thrust will act on the motor seat 1, so that the structure will not have any influence on the driven gear 41, thereby ensuring good engagement of the drive gear 5 and the driven gear 41.
The oil nozzle 29 is taken out, and grease is injected through the grease hole to lubricate the angular contact bearing 13.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (6)
1. The hollow motor for high-pressure water removal is characterized in that: comprises a power driving part at the lower side and a rotary sealing part arranged at the upper side of the power driving part;
The power driving part comprises a motor seat, a hollow driving shaft, a motor shell, a motor cover plate, a driving gear and a floating side plate, wherein the motor shell is arranged on the motor seat, the motor cover plate is arranged at the top of the motor shell, the hollow driving shaft vertically penetrates through the motor seat, the motor shell and the motor cover plate, the driving gear and the floating side plate are both arranged in the motor shell, the central line of the driving gear is parallel to the hollow driving shaft, a driven gear meshed with the driving gear is arranged on the hollow driving shaft, the driving gear and the hollow driving shaft are both supported into the floating side plate through sliding bearing bushes, an oil inlet corresponding to the meshing position of the driving gear and the driven gear is formed in the front side of the motor shell, an oil outlet corresponding to the meshing position of the driving gear and the driven gear is formed in the rear side of the motor shell, a first central limiting sealing assembly is arranged between the lower part of the hollow driving shaft and the motor seat, and the upper part of the hollow driving shaft is rotationally connected to the inside of the rotary sealing part through a second central limiting sealing assembly and a third central limiting sealing assembly;
The first central limiting sealing assembly comprises a duplex angular contact bearing and a gland, the hollow driving shaft is rotationally connected with the motor seat through the duplex angular contact bearing, the gland is sleeved outside the hollow driving shaft and is arranged at the bottom of the motor seat through a second fastening bolt, a third sealing ring is arranged between the upper surface of the gland and the bottom of the motor seat, the lower part of the hollow driving shaft is in threaded connection with a first pressing sleeve, the lower end of the first pressing sleeve is in pressing fit with the inner ring of the duplex angular contact bearing, the upper end of the gland is in pressing fit with the outer ring of the duplex angular contact bearing, and a first oil seal is arranged between the inner ring of the gland and the outer circumference of the first pressing sleeve;
The rotary sealing part comprises a hollow shell body which is penetrated up and down, the bottom of the hollow shell body is connected with a motor cover plate through a third fastening bolt, the top of the hollow shell body is connected with a shell cover through a fourth fastening bolt, a pipe joint is arranged at the upper part in the shell cover, an upper pressing cap which is connected with the outer part of the shell cover through threads is sleeved outside the pipe joint, an upper convex ring which is pressed between the top end of the shell cover and the bottom surface of the upper pressing cap is integrally arranged outside the pipe joint, a supporting ring is arranged at the middle part of the inner wall of the shell cover, a copper sleeve is arranged on the supporting ring in the shell cover, the upper part of the copper sleeve stretches into the lower part in the pipe joint, a hollow connecting shaft is arranged inside the copper sleeve, a filling sealing ring which is arranged at the upper part of the copper sleeve is arranged between the outer circle at the upper part of the hollow connecting shaft and the inner wall of the pipe joint, a first O-shaped sealing ring is arranged between the periphery of the filling sealing ring and the inner ring of the pipe joint, the aperture of a high-pressure water hole in the pipe joint is larger than the inner diameter of the filling sealing ring, the compression joint surface of the lower end of the filling sealing ring and the upper end of the copper sleeve is of a conical structure with thick upper part and thin lower part, the upper end of the hollow driving shaft stretches into the shell cover and is positioned below the supporting ring, the lower end of the hollow connecting shaft stretches into the upper end of the hollow driving shaft, a lower convex ring is integrally arranged on the outer circle of the hollow connecting shaft, a lower pressing cap is connected with the outer thread of the upper end of the hollow driving shaft, the lower pressing cap is sleeved outside the hollow connecting shaft, and the lower convex ring is compressed at the upper end part of the hollow driving shaft by the lower pressing cap;
The second central limiting sealing assembly is positioned below the third central limiting sealing assembly and comprises an angular contact bearing, a first check ring and a second oil seal which are arranged on the hollow driving shaft, a motor cover plate is provided with a mounting groove, the second oil seal is positioned at the bottom of the mounting groove, the first check ring is arranged in the mounting groove and positioned at the upper part of the second oil seal, the inner ring of the angular contact bearing is in interference fit with the outer circle of the hollow driving shaft, and the outer ring of the angular contact bearing is in contact fit with the lower part of the inner wall of the hollow shell;
The third central limiting sealing assembly comprises a second check ring, a third oil seal and a second pressing sleeve which are sleeved on the hollow driving shaft, the second pressing sleeve is in threaded connection with the hollow driving shaft, the lower end of the second pressing sleeve is in contact with the upper end of the angular contact bearing, the third oil seal is arranged on the outer ring of the second pressing sleeve, a spacer which separates the inner cavity of the hollow shell into an upper cavity and a lower cavity is arranged between the outer ring of the third oil seal and the inner wall of the hollow shell, a second O-shaped sealing ring is arranged between the periphery of the spacer and the inner wall of the hollow shell, and the second check ring is arranged on the inner wall of the hollow shell and is positioned on the upper part of the spacer.
2. The high-pressure water-scavenging hollow motor according to claim 1, wherein: the motor seat is connected with the motor shell through a locating pin and a first fastening bolt, a first sealing ring is arranged between the upper end face of the motor seat and the lower end face of the motor shell, and a second sealing ring is arranged between the upper end face of the motor shell and the lower surface of the motor cover plate.
3. The high-pressure water-scavenging hollow motor according to claim 1, wherein: the side part of the hollow shell is provided with a lubricating oil hole positioned above the angular contact bearing, and an oil nozzle is arranged in the lubricating oil hole.
4. The high-pressure water-scavenging hollow motor according to claim 1, wherein: an upper water outlet positioned on the outer side of the lower part of the copper sleeve is arranged on the side part of the shell cover.
5. The high-pressure water-scavenging hollow motor according to claim 1, wherein: the upper side part of the lower pressing cap is provided with a lower inner water outlet, and the side part of the hollow shell is provided with a lower outer water outlet positioned at the upper part of the second retaining ring.
6. The high-pressure water-scavenging hollow motor according to claim 1, wherein: the side part of the pipe joint is provided with an overflow port above the upper convex ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358748.3A CN109281797B (en) | 2018-11-15 | 2018-11-15 | Hollow motor for high-pressure water removal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358748.3A CN109281797B (en) | 2018-11-15 | 2018-11-15 | Hollow motor for high-pressure water removal |
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| Publication Number | Publication Date |
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| CN109281797A CN109281797A (en) | 2019-01-29 |
| CN109281797B true CN109281797B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811358748.3A Active CN109281797B (en) | 2018-11-15 | 2018-11-15 | Hollow motor for high-pressure water removal |
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| CN105887637A (en) * | 2016-05-10 | 2016-08-24 | 南通威而多专用汽车制造有限公司 | Road marking hand push type high-pressure water cleaning vehicle |
| CN207597326U (en) * | 2017-08-31 | 2018-07-10 | 福建海山机械股份有限公司 | A kind of automobile-used high-pressure water jet rotating device |
| CN209293958U (en) * | 2018-11-15 | 2019-08-23 | 南通威而多专用汽车制造有限公司 | Hollow motor is used in high pressure water removing |
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2018
- 2018-11-15 CN CN201811358748.3A patent/CN109281797B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2355780A1 (en) * | 2000-08-26 | 2002-02-26 | Umwetec Gmbh & Co. Kg | Roadway cleaning apparatus |
| CN2791110Y (en) * | 2005-05-30 | 2006-06-28 | 南京太空高压清洗设备有限公司 | Traffic marking line cleaning vehicle |
| DE102005056909A1 (en) * | 2005-11-29 | 2007-05-31 | Bosch Rexroth Ag | Hydraulic gearwheel machine e.g. reversible outer gear wheel motor, for mobile hydraulic system, has covers with front recesses, where one recess is coupled with leakage oil channel of support latches via grooves for forming oil flow path |
| CN101965234A (en) * | 2008-02-28 | 2011-02-02 | 詹姆斯·P·克劳科尔 | Water blasting head with through feeding hydraulic motor |
| CN105887637A (en) * | 2016-05-10 | 2016-08-24 | 南通威而多专用汽车制造有限公司 | Road marking hand push type high-pressure water cleaning vehicle |
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| CN209293958U (en) * | 2018-11-15 | 2019-08-23 | 南通威而多专用汽车制造有限公司 | Hollow motor is used in high pressure water removing |
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| CN109281797A (en) | 2019-01-29 |
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