A high-pressure jet water cleaning nozzle rotating body

Abstract

The application discloses a high-pressure jet flow water cleaning nozzle rotating body, which comprises a gland, a bearing body and a main shaft, the gland is sealingly connected to the rear end of the bearing body, the main shaft is concentrically installed in the bearing body, the rear end of the main shaft is rotatably and sealingly connected with the flow channel of the gland, a speed reducer is installed between the bearing body and the main shaft, the two ends of the bearing body are supported by a radial bearing A and a radial bearing B, a sealing assembly is installed between the two ends of the main shaft and the gland and the bearing body respectively, and a thrust bearing is installed between the radial bearings and supports the thrust bearing, wherein the main shaft is in clearance fit with the radial bearings and has a slidable tendency, and the axial force of the main shaft is transmitted to the gland by the thrust bearing. In the application, the traditional structure mode that a thrust angular contact bearing is matched with a radial bearing to support is abandoned, the radial bearing only bears the radial force, and all the axial force is transmitted to the bearing body through the thrust bearing, so that the bearings work under the best working condition, and the service life is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to a cleaning device component, particularly a rotating body for a high-pressure jet water cleaning nozzle. Background Technology

[0002] In industrial cleaning, the cleaning of the inner walls of pipes such as heat exchangers generally requires the use of rotary nozzles. Since the rotating body needs to rotate due to the internal main shaft, it requires internal bearing support. The water pressure required in industrial cleaning can reach thousands of kilograms, which will generate a very large axial force when acting on the end face of the main shaft. The current solution is to use a radial bearing for support on one side and two thrust angular contact bearings for support on the other side. Although thrust angular contact bearings can withstand axial and radial forces, their balls have a certain tilt angle. Under the action of extremely high speed and axial force, wear will be accelerated, causing bearing failure and thus affecting the service life of the entire device. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-pressure jet water cleaning nozzle rotating body, thereby reasonably dispersing and transmitting the axial force and radial force of the main shaft, greatly reducing bearing wear and increasing the service life of the device.

[0004] The technical solution of this invention is as follows:

[0005] A high-pressure jet water cleaning nozzle rotating body includes a gland, a bearing body, and a main shaft. The gland is sealed to the rear end of the bearing body, and the main shaft is concentrically mounted in the bearing body. The rear end of the main shaft is rotatably and sealed to the flow channel of the gland. A speed reduction device is installed between the bearing body and the main shaft, and the two ends of the bearing body are supported by radial bearings A and B. Sealing components are installed between the two ends of the main shaft and the gland and the bearing body, respectively. A thrust bearing is installed between the radial bearings for support. The main shaft and the radial bearings are clearance-fitted and have a tendency to slide. The axial force of the main shaft is transmitted to the gland by the thrust bearing.

[0006] Furthermore, the speed reduction device includes a speed limiting wheel assembly and a copper ring. The speed limiting wheel assembly is fixed on the main shaft, and the copper ring is concentrically fixed on the inner wall of the bearing body. The speed limiting wheel assembly rotates around the copper ring.

[0007] Furthermore, the speed limiting wheel assembly consists of a nest and a permanent magnet ring. The permanent magnet ring is fitted into the nested slot, and the magnetic poles of the adjacent permanent magnet blocks are opposite. The permanent magnet blocks are bonded and fixed as a whole.

[0008] Furthermore, filler blocks are installed between adjacent permanent magnet blocks to achieve different rotational speed requirements.

[0009] Furthermore, the main shaft is provided with a push ring at the nested position, and a corresponding thrust plate is provided in the nest. The nest is set to abut against the radial bearing A, and an outer retaining ring is provided between the radial bearing A and the nest. The outer side of the radial bearing A abuts against the sealing assembly on the same side, and the sealing assembly abuts against the end buckle of the bearing body.

[0010] Furthermore, the gland and the bearing body are screwed together.

[0011] Furthermore, a retaining ring is installed on the outside of the end buckle of the main shaft, and the retaining ring is fixed to the main shaft by bolts.

[0012] Furthermore, a sealing sleeve is installed on the inner wall of the flow channel of the gland, and a plug section is provided at the rear end of the main shaft, which is inserted into the sealing sleeve.

[0013] Furthermore, the front end circumferential surface of the spindle is machined with external threads and has a sealing groove.

[0014] The advantages of this invention are:

[0015] This invention relates to the connection between pipes and rotating nozzles in a high-pressure jet water cleaning device. The recoil torque of the nozzles acts on the main shaft, causing the main shaft to drive the nozzles to rotate at high speed to perform the rinsing action. Due to the high water pressure (pressure values ​​can reach thousands of kilograms), even if the cross-section of the rear end face of the main shaft is small, it will still generate a very large axial thrust on the main shaft. This invention abandons the traditional structure of using a thrust angular contact bearing and a radial bearing for support. The main shaft and the radial bearing are in a clearance fit, with a tendency to slide (in reality, since the thrust bearing is pressing against the main shaft, there is no actual displacement between the main shaft and the bearing body). At this time, all the axial force is transmitted to the bearing body through the thrust bearing. Thus, both the radial bearing and the thrust bearing are under their optimal stress conditions, which greatly improves the service life of the device. In the event of bearing failure, it effectively protects the sealing device of the main shaft and prevents damage to the main shaft and the sealing device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the invention.

[0017] In the diagram: 1-Bearing body, 11-End buckle, 2-Pressure cap, 21-Sealing sleeve, 3-Main shaft, 31-Sealing sleeve, 32-Thrust ring, 33-External thread, 34-Sealing groove, 4-Reduction gear, 41-Nested, 411-Thrust plate, 42-Permanent magnet ring, 43-Copper ring, 5-Radial bearing A, 51-Radial bearing B, 52-Thrust bearing, 6-Sealing assembly, 7-Outer retaining ring, 8-Snap ring, 81-Bolt. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] like Figure 1 As shown:

[0020] A high-pressure jet water cleaning nozzle rotating body includes a pressure cap 2, a bearing body 1, and a main shaft 3. The pressure cap 2 is sealed to the rear end of the bearing body 1 (the pressure cap 2 and the bearing body 1 can be threaded together for easy sealing and disassembly). The main shaft 3 is concentrically installed inside the bearing body 1, and the rear end of the main shaft 3 is rotatably and sealed to the flow channel of the pressure cap 2. A reduction gear 4 is installed between the bearing body 1 and the main shaft 3. The two ends of the bearing body 1 are supported by radial bearings A5 and B51. Sealing components 6 are installed between the two ends of the main shaft 3 and the pressure cap 2 and the bearing body 1, respectively. Thrust bearings 52 are installed between the radial bearings. The main shaft 3 is fitted with a radial bearing with a clearance fit, giving it a tendency to slide. The axial force of the main shaft 3 is transmitted to the pressure cover 2 by the thrust bearing 52. (The rotating body will be subjected to a large axial force during operation, hundreds or even thousands of kilograms of axial thrust. In the main shaft 3 support system, the thrust angular contact bearing bears the greatest stress. Under normal circumstances, the thrust angular contact bearing will be the first to be damaged, and the rotating body will not be able to work. However, in this invention, since the axial force of the main shaft 3 is transmitted to the pressure cover 2 by the thrust bearing 52, the radial bearings at both ends are intact, and the gap between the main shaft 3 and the sealing sleeve 3121 will not be displaced, so the sealing sleeve 3121 of the main shaft 3 will not be damaged.)

[0021] This invention relates to the connection between pipes and rotating nozzles in a high-pressure jet water cleaning device. The recoil torque of the nozzles acts on the main shaft 3, causing the main shaft 3 to drive the nozzles to rotate at high speed to perform the rinsing action. Due to the high water pressure (pressure values ​​can reach thousands of kilograms), even if the cross-section of the rear end face of the main shaft 3 is small, it will still generate a very large axial thrust on the main shaft 3. This invention abandons the traditional structure of using a thrust angular contact bearing and a radial bearing for support. The main shaft 3 and the radial bearing are in a clearance fit, with a tendency to slide (in fact, since the thrust bearing 52 is pressing against the main shaft 3, there is no actual displacement between the main shaft 3 and the bearing body 1). At this time, all the axial force is transmitted to the bearing body 1 through the thrust bearing 52. Thus, both the radial bearing and the thrust bearing 52 are under their optimal stress conditions, which greatly improves the service life of the device. In the event of bearing failure, it effectively protects the sealing device of the main shaft 3, preventing damage to the main shaft 3 and the sealing device.

[0022] Because the fluid pressure of the cleaning device is high, the backlash torque is very large. If the nozzle speed is too high, it can easily lead to water flow concentration problems. Also, if the bearing speed is too high, it will accelerate wear. Therefore, a speed reduction device 4 is required to limit the speed. Conventional friction speed reduction will reduce or even fail due to the wear of friction plates, etc. Therefore, the best way is to use magnetic speed reduction. The specific speed reduction device 4 includes a speed limiting wheel assembly and a copper ring 43. The speed limiting wheel assembly is fixed on the main shaft 3, and the copper ring 43 is concentrically fixed on the inner wall of the bearing body 1. The speed limiting wheel assembly rotates around the copper ring 43. The speed limiting wheel assembly has several permanent magnet components arranged in a ring. The inner and outer magnetic poles of adjacent magnetic rings are opposite. After high-speed rotation, an alternating current is generated in the copper ring 43. The alternating current generates an alternating magnetic field opposite to the magnetic field of the magnetic ring, thereby driving the main shaft 3 to decelerate. The deceleration capability increases rapidly with the increase of speed.

[0023] Since magnetic rings are composed of adjacent magnetic blocks with opposite positive and negative poles, they are currently fixed by intermittent insertion. However, due to limited space, this insertion method occupies a large portion of the space, thus reducing the number of magnetic blocks and causing a decrease in deceleration capability. Therefore, in this invention, the speed limiting wheel assembly consists of a nest 41 and a permanent magnet ring 42. The permanent magnet ring 42 is fitted into the slot of the nest 41, and the inner and outer magnetic poles of the adjacent permanent magnet blocks of the permanent magnet ring 42 are opposite. The permanent magnet blocks are bonded and fixed into a whole. After bonding them into a whole, no insertion space is required, which can maximize the utilization of the slot volume. If it is necessary to produce products with higher rotation speeds, the size and number of magnetic rings can be adjusted, and filler blocks can be added between adjacent permanent magnet blocks. This can greatly reduce the difficulty of assembly.

[0024] As a further optimization, to ensure smooth axial force transmission of the spindle 3, a push ring 32 is provided at the position of the nest 41 of the spindle 3. The nest 41 is provided with a corresponding thrust plate 411. The nest 41 is set to abut against the radial bearing A5. An outer retaining ring 7 is provided between the radial bearing A5 and the nest 41. The outer side of the radial bearing A5 abuts against the sealing component 6 on the same side. The sealing component 6 presses against the end buckle 11 of the bearing body 1. Thus, the axial force transmission route of the spindle 3 is push ring 32 - thrust plate 411 - nest 41 - outer retaining ring 7 - radial bearing A5 - sealing component 6 - end buckle 11 - bearing body 1.

[0025] To facilitate the installation of the main shaft 3 and to protect the end clip 11 after installation, a retaining ring 8 is installed on the outside of the main shaft 3 located at the end clip 11. The retaining ring 8 is fixed to the main shaft 3 by bolts 81 (there are two reasons for adding the retaining ring 8: firstly, when replacing the nozzle body, the main shaft 3 can be clamped with a wrench; secondly, it can protect the skeleton oil seal at the front end of the rotating body and extend the service life of the oil seal). The front end of the main shaft 3 needs to be connected to the nozzle. To facilitate replacement and sealing, the circumferential surface of the front end of the main shaft 3 is machined with external threads 33 and a sealing groove 24 is provided (for adding a sealing ring).

[0026] In the prior art, the sealing between the flow channel and the main shaft 3 is generally achieved by inserting the sealing sleeve 3121 into the center of the main shaft 3. However, since the center of the sealing sleeve 3121 lacks support, it is prone to swinging and constantly rubbing against the inner wall of the channel of the main shaft 3 under high-speed rotation. As wear increases, the seal will fail. In this invention, a sealing sleeve 3121 is installed on the inner wall of the flow channel of the pressure cover 2, and an insertion section is provided at the rear end of the main shaft 3. The insertion section is inserted into the sealing sleeve 3121. In this way, the inner and outer walls of the sealing sleeve 3121 are restricted and will not swing, thereby ensuring that the friction is within a controllable range and improving the life of the device.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A rotating body for a high-pressure jet water cleaning nozzle, characterized in that: The device includes a gland, a bearing housing, and a main shaft. The gland is sealed to the rear end of the bearing housing, and the main shaft is concentrically mounted in the bearing housing. The rear end of the main shaft is rotatably sealed to the flow channel of the gland. A speed reduction device is installed between the bearing housing and the main shaft. Both ends of the bearing housing are supported by radial bearings A and B. Sealing components are installed between both ends of the main shaft and the gland and the bearing housing, respectively. A thrust bearing is installed between the radial bearings for support. The main shaft and the radial bearings are clearance-fitted and have a tendency to slide. The axial force of the main shaft is transmitted to the gland by the thrust bearing.

2. The rotating body of the high-pressure jet water cleaning nozzle according to claim 1, characterized in that: The speed reduction device includes a speed limiting wheel assembly and a copper ring. The speed limiting wheel assembly is fixed on the main shaft, and the copper ring is concentrically fixed on the inner wall of the bearing body. The speed limiting wheel assembly rotates around the copper ring.

3. The rotating body of the high-pressure jet water cleaning nozzle according to claim 2, characterized in that: The speed limiting wheel assembly consists of a nest and a permanent magnet ring. The permanent magnet ring is fitted into the nested slot, and the magnetic poles of the adjacent permanent magnet blocks are opposite. The permanent magnet blocks are bonded and fixed as a whole.

4. The rotating body of the high-pressure jet water cleaning nozzle according to claim 3, characterized in that: Filler blocks are installed between adjacent permanent magnet blocks to achieve different rotational speed requirements.

5. The rotating body of the high-pressure jet water cleaning nozzle according to claim 3, characterized in that: The main shaft is provided with a push ring at the nested position, and a corresponding thrust plate is provided in the nest. The nest is set to abut against the radial bearing A, and an outer retaining ring is provided between the radial bearing A and the nest. The outer side of the radial bearing A abuts against the sealing component on the same side, and the sealing component abuts against the end buckle of the bearing body.

6. The rotating body of the high-pressure jet water cleaning nozzle according to claim 4, characterized in that: The gland and the bearing body are screwed together.

7. The rotating body of the high-pressure jet water cleaning nozzle according to claim 5, characterized in that: A retaining ring is installed on the outside of the end buckle of the main shaft, and the retaining ring is fixed to the main shaft by bolts.

8. The rotating body of the high-pressure jet water cleaning nozzle according to claim 5, characterized in that: A sealing sleeve is installed on the inner wall of the flow channel of the gland, and a plug section is provided at the rear end of the main shaft, which is inserted into the sealing sleeve.

9. The rotating body of the high-pressure jet water cleaning nozzle according to claim 5, characterized in that: The front end of the spindle is machined with external threads and has a sealing groove.

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