Main shaft end material blocking structure and vertical shaft impact type sand making machine
By setting the first and second barrier rings on the outside of the maze cover at the end of the sand making machine spindle to block the sand and gravel, the problem of maze cover wear is solved, extending the service life and reducing maintenance costs.
Patent Information
- Application Number
- CN202421343779.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-12
AI Technical Summary
In existing sand making machines, the labyrinth cover and sand and gravel wear, resulting in rapid wear of the labyrinth cover, damage to the seal ring, damage to the precision bearing, and increasing maintenance costs and downtime.
A first and second barrier rings are arranged on the outside of the maze cover at the end of the spindle to block splashing sand and gravel, preventing sand and gravel from entering the surroundings of the maze cover and rubbing against the maze cover.
It extends the service life of the maze cover, reduces the time and cost of equipment failure and downtime maintenance, and can even achieve the effect of free replacement of the maze cover.
Smart Images
Figure CN222778190U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of sand making machines, and specifically relates to a main shaft end material blocking structure and a vertical shaft impact sand making machine. Background Art
[0002] The vertical shaft impact sand making machine adopts the mode of hitting iron with stone or hitting stone to make sand. It is widely used in the sand and gravel industry because of its low cost, high processing capacity, high sand forming rate, and excellent finished sand grain type. The general structure of the vertical shaft impact sand making machine (hereinafter referred to as the sand making machine) is: the main shaft is installed vertically in the bearing cylinder, the upper shaft head of the main shaft is installed with a rotor, and the lower shaft head of the main shaft is installed with a pulley. When working, the motor drives the main shaft to rotate at high speed through the transmission of the belt and the pulley, and then drives the rotor located in the crushing chamber to rotate at high speed, accelerating the sand and gravel materials to hit the accumulation layer or anvil around the crushing chamber, so as to achieve the crushing and sand making of sand and gravel. Among them, the bearing cylinder is the core component of the sand making machine, and is equipped with precision bearings inside. It is the key to realize the high-speed rotation of the main shaft. Therefore, the sealing and dustproof structure at the upper end of the bearing cylinder is very important. Once the sealing and dustproof fails, the sand and gravel will enter the interior of the bearing cylinder, and the precision bearing will be quickly worn and damaged, causing the sand making machine to fail to work.
[0003] like Figure 1 As shown, the sealing and dustproof structure at the upper end of the bearing cylinder 17 generally includes a sealing ring 16, an end cover 14 and a labyrinth cover 15. The labyrinth cover 15 is screwed onto the main shaft 11 through a thread and rotates with the main shaft 11 and the rotor 12. The bearing cylinder 17 below the labyrinth cover 15 is equipped with an end cover 14, the inner ring of the end cover 14 is equipped with a sealing ring 16, and the upper part of the end cover 14 is provided with a groove that cooperates with the labyrinth cover 15. The end cover 14 and the labyrinth cover 15 cooperate to form a labyrinth structure, commonly known as a labyrinth seal. The labyrinth seal can prevent sand and gravel outside the labyrinth cover 15 from entering the sealing ring 16 and then entering the interior of the bearing cylinder 17.
[0004] In the prior art, as the working time of the sand making machine increases, the splashing sand and gravel will naturally accumulate at the upper end of the bearing cylinder 17. When the labyrinth cover 15 rotates with the main shaft 11, the labyrinth cover 15 will continuously rub against the accumulated sand and gravel, causing the labyrinth cover 15 to wear. Especially in the sand making working condition of hard rock (such as granite, tuff, river pebbles), even if the labyrinth cover 15 is made of high-quality steel and processed by quenching and tempering, it has a high hardness, but it is still difficult to resist the abrasion of hard rock. The wear speed of the labyrinth cover 15 is accelerated. After the outer edge of the labyrinth cover 15 is worn, the sand and gravel will further wear the labyrinth groove. After the labyrinth groove is worn, it will enter the inside of the sealing ring 16, accelerate the wear of the sealing ring 16, and finally enter the inside of the bearing cylinder 17, damaging the precision bearing, resulting in a large maintenance cost. Although the replacement cycle of the labyrinth cover 15 can be shortened, the labyrinth cover 15 can be replaced before it is worn. However, the replacement of the labyrinth cover 15 requires a large amount of disassembly of the sand making machine, and the replacement can only be carried out after the rotor 12 is removed and the sand and gravel are fully cleaned. The replacement workload is large, the work requirements are high, and the working environment is harsh. Utility Model Content
[0005] The purpose of this application is to provide a spindle end material blocking structure and a vertical shaft impact sand making machine, which are used to solve the problem of wear between the labyrinth cover at the spindle end of the sand making machine and the sand and gravel, so as to extend the service life of the labyrinth cover and reduce the time and cost of equipment failure downtime maintenance.
[0006] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a spindle end material stop structure, comprising:
[0007] A spindle assembly, comprising a spindle, a rotor, a support seat, an end cover and a labyrinth cover; one end of the spindle extends outward from the shaft hole of the support seat and is connected to the rotor; the end cover is arranged at the end of the shaft hole of the support seat, the labyrinth cover is sleeved on the spindle, and the end cover cooperates with the labyrinth cover to form a labyrinth seal;
[0008] A first material retaining ring is fixed on the support seat and sleeved on the outer side of the labyrinth cover;
[0009] The second material retaining ring is fixed on the rotor, sleeved on the outer side of the first material retaining ring, and axially overlapped with the first material retaining ring.
[0010] In some embodiments, the radial gap width between the first retaining ring and the second retaining ring is 2-5 mm.
[0011] In some embodiments, the axial overlapping height of the first retaining ring and the second retaining ring is 10-30 mm.
[0012] In some embodiments, a wheel disc seat is provided at the bottom of the rotor, and the top end of the first retaining ring is higher than the bottom surface of the wheel disc seat.
[0013] In some embodiments, a flange portion is provided at the end of the support seat, and an ear seat is arranged in a ring shape at the bottom of the first retaining ring, and the ear seat is connected to the flange portion using fasteners.
[0014] In some embodiments, a top of the first material retaining ring is provided with an outward flange, and the flange is embedded in the interior of the first material retaining ring.
[0015] In some embodiments, the width of the turned-out edge is 5-20 mm, or the height of the turned-out edge is 10-30 mm.
[0016] In some embodiments, the second retaining ring is welded to the bottom of the rotor.
[0017] In some embodiments, the first retaining ring and the support seat are an integral structure, and / or the second retaining ring and the rotor are an integral structure.
[0018] The second aspect of the present application provides a vertical shaft impact sand making machine, which adopts the above-mentioned main shaft end material blocking structure.
[0019] Compared with the prior art, the beneficial effects of this application are:
[0020] The present application arranges axially overlapping first and second material stop rings on the outside of the labyrinth cover at the end of the main shaft to block the flying sand and gravel on the outside of the first material stop ring, so that the sand and gravel cannot enter and accumulate around the labyrinth cover and rub against the labyrinth cover, thereby solving the problem of wear between the labyrinth cover and the sand and gravel at the end of the main shaft of the sand making machine, thereby extending the service life of the labyrinth cover and reducing the time and cost of equipment downtime and maintenance.
[0021] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:
[0023] Figure 1 It is a cross-sectional view of the sealing and dustproof structure at the upper end of the bearing cylinder in the prior art.
[0024] Figure 2 This is a cross-sectional view of a spindle end stop structure according to a specific implementation method of the present application.
[0025] Figure 3 This is a structural diagram of the first retaining ring of a specific implementation method of the present application.
[0026] Figure 4 This is a structural diagram of the second retaining ring of a specific implementation method of the present application.
[0027] Explanation of the reference numerals: spindle assembly 1 , spindle 11 , rotor 12 , support seat 13 , end cover 14 , labyrinth cover 15 , sealing ring 16 , bearing cylinder 17 , first retaining ring 2 , ear seat 21 , flange 22 , second retaining ring 3 . DETAILED DESCRIPTION
[0028] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.
[0029] like Figures 2 to 4 As shown, a spindle end stopper structure specifically comprises:
[0030] The spindle assembly 1 is provided with a spindle 11, a rotor 12, a support seat 13, an end cover 14 and a labyrinth cover 15; one end of the spindle 11 extends outward from the shaft hole of the support seat 13 and is connected to the rotor 12; the end cover 14 is arranged at the end of the shaft hole of the support seat 13, the labyrinth cover 15 is sleeved on the spindle 11, and the end cover 14 and the labyrinth cover 15 cooperate to form a labyrinth seal;
[0031] The first retaining ring 2 is fixed on the support seat 13 and sleeved on the outer side of the labyrinth cover 15;
[0032] The second retaining ring 3 is fixed on the rotor 12 , sleeved on the outer side of the first retaining ring 2 , and overlapped with the first retaining ring 2 axially.
[0033] In the present application, the spindle assembly 1 is usually arranged vertically. The diameter of the first retaining ring 2 is smaller than the diameter of the second retaining ring 3, and there is a radial gap between the first retaining ring 2 and the second retaining ring 3, and they overlap in the axial part. The first retaining ring 2 is in a stationary state, and the second retaining ring 3 rotates with the rotor 12, and the two can form a barrier on the outside of the labyrinth cover 15. The splashing sand and gravel are blocked on the outside of the first retaining ring 2, and the sand and gravel cannot enter and accumulate around the labyrinth cover 15, so that the labyrinth cover 15 no longer rubs against the sand and gravel, thereby solving the problem of wear between the labyrinth cover 15 and the sand and gravel at the end of the spindle 11 of the sand making machine, and protecting the labyrinth cover 15, extending the service life of the labyrinth cover 15, and reducing the time and cost of equipment failure downtime maintenance. Theoretically, the effect of free replacement of the labyrinth cover 15 can be achieved.
[0034] Specifically, the radial gap width between the first retaining ring 2 and the second retaining ring 3 is 2-5 mm.
[0035] Specifically, the axial overlapping height between the first retaining ring 2 and the second retaining ring 3 is 10-30 mm.
[0036] In the present application, if the radial gap between the first retaining ring 2 and the second retaining ring 3 is too wide or the axial overlapping height is too low, they cannot play a barrier role, and flying sand and gravel may enter the vicinity of the labyrinth cover 15 through the radial gap; if the radial gap is too narrow or the axial overlapping height is too high, the machining accuracy and assembly accuracy of the rotor 12, the first retaining ring 2 and the second retaining ring 3 will be increased, which is not conducive to cost control.
[0037] Specifically, a wheel disc seat is provided at the bottom of the rotor 12, and the top of the first retaining ring 2 is higher than the bottom surface of the wheel disc seat. Since the second retaining ring 3 rotates with the rotor 12, the splashing sand and gravel will still naturally accumulate on the outside of the first retaining ring 2. In order to reduce the wear between the second retaining ring 3 and the sand and gravel, the top of the first retaining ring 2 should be as high as possible, and the bottom of the second retaining ring 3 should also be as high as possible. In addition, when the top of the first retaining ring 2 is higher than the bottom surface of the wheel disc seat of the rotor 12, the first retaining ring 2, the second retaining ring 3 and the wheel disc seat can form a "J"-shaped second barrier to further prevent the splashing sand and gravel from entering the periphery of the labyrinth cover 15.
[0038] Specifically, a flange portion is provided at the end of the support seat 13, and an ear seat 21 is arranged in an annular manner at the bottom of the first retaining ring 2, and the ear seat 21 is connected to the flange portion using fasteners. A flange portion is usually provided at the end of the support seat 13 so that the spindle assembly 1 is connected and fastened to the frame of the equipment. The first retaining ring 2 is fixed to the support seat 13 by providing an ear seat 21 at the bottom and fastening the ear seat 21 to the flange portion, which is convenient to install and easy to improve the end of the spindle 11 of the existing sand making machine.
[0039] Specifically, a flange 22 is provided outwardly at the top of the first material retaining ring 2 , and the flange 22 is embedded in the interior of the first material retaining ring 2 .
[0040] Furthermore, the width of the flange 22 turned outward is 5-20 mm, or the height of the flange 22 turned outward is 10-30 mm.
[0041] In the present application, the flange 22 can increase the structural strength of the top of the first retaining ring 2. More importantly, the flange 22 forms a step at the top of the first retaining ring 2, and the step surface can block the airflow carrying fine sand and gravel that rises vertically along the side wall of the first retaining ring 2, forming a third barrier to further block the splashing sand and gravel from entering the periphery of the labyrinth cover 15.
[0042] Specifically, the second retaining ring 3 is welded to the bottom of the rotor 12 .
[0043] In some embodiments, the radial clearance width between the first retaining ring 2 and the second retaining ring 3 is 3 mm, and the axial overlap height is 20 mm. Four ear seats 21 are arranged in an annular manner at the bottom of the first retaining ring 2, and the holes of the ear seats 21 correspond one-to-one to the holes of the flange portion on the support seat 13, and the ear seats 21 and the flange portion are fixed with bolts. The bottom surface of the flange 22 of the first retaining ring 2 is flush with the bottom surface of the second retaining ring 3, and the height of the flange 22 is 20 mm, which is the axial overlap height of the first retaining ring 2 and the second retaining ring 3. After the second retaining ring 3 is sleeved on the wheel disc seat of the rotor 12, it is fixed to the rotor 12 by welding.
[0044] Optionally, the first retaining ring 2 is welded to the upper end of the support tube, or the side wall of the second retaining ring 3 is connected to the side wall of the wheel disc seat of the rotor 12 using fasteners.
[0045] Optionally, the first retaining ring 2 and the support seat 13 are an integral structure, or the second retaining ring 3 and the rotor 12 are an integral structure. For a newly produced sand making machine, the first retaining ring 2 as a part of the upper end of the support seat 13 can be formed by integral casting or groove processing; the second retaining ring 3 as a part of the lower end of the rotor 12 can be formed by integral casting or groove processing.
[0046] The present application makes full use of the structural features of the support seat 13 and the rotor 12 of the main shaft assembly 1 in the existing sand making machine, analyzes the causes of wear of the labyrinth cover 15, and designs the first retaining ring 2 and the second retaining ring 3 to be respectively installed and fixed on the support seat 13 and the rotor 12, the first retaining ring 2 and the second retaining ring 3 to form a gap in the radial direction, the first retaining ring 2 is in a stationary state, and the second retaining ring 3 rotates with the rotor 12. The first retaining ring 2 and the second retaining ring 3 can block the splashing sand and gravel on the outside of the first retaining ring 2 to prevent the sand and gravel from entering the inside of the labyrinth cover 15. This structure is easy to implement, low in cost, and good in use effect.
[0047] A vertical shaft impact sand making machine adopts the above-mentioned main shaft end material blocking structure.
[0048] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0049] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0051] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A spindle end stop structure, characterized in that: The spindle end material blocking structure comprises: A spindle assembly (1) is provided with a spindle (11), a rotor (12), a support seat (13), an end cover (14) and a labyrinth cover (15); one end of the spindle (11) extends outward from an axial hole of the support seat (13) and is connected to the rotor (12); the end cover (14) is arranged at the end of the axial hole of the support seat (13), the labyrinth cover (15) is sleeved on the spindle (11), and the end cover (14) cooperates with the labyrinth cover (15) to form a labyrinth seal; A first material retaining ring (2) is fixed on the support seat (13) and sleeved on the outer side of the labyrinth cover (15); The second retaining ring (3) is fixed on the rotor (12), sleeved on the outside of the first retaining ring (2), and axially overlaps with the first retaining ring (2).
2. The spindle end stopper structure according to claim 1, characterized in that: The radial gap width between the first retaining ring (2) and the second retaining ring (3) is 2-5 mm.
3. The spindle end stop structure according to claim 1, characterized in that: The axial overlapping height of the first material retaining ring (2) and the second material retaining ring (3) is 10-30 mm.
4. The spindle end stop structure according to claim 1, characterized in that: A wheel disc seat is provided at the bottom of the rotor (12), and the top end of the first material retaining ring (2) is higher than the bottom surface of the wheel disc seat.
5. The spindle end stop structure according to claim 1, characterized in that: A flange portion is provided at the end of the support seat (13), and an ear seat (21) is arranged in an annular shape at the bottom of the first retaining ring (2), and the ear seat (21) is connected to the flange portion using fasteners.
6. The spindle end stop structure according to claim 1, characterized in that: The top of the first material retaining ring (2) is provided with a flange (22) facing outwards, and the flange (22) is embedded in the interior of the first material retaining ring (2).
7. The spindle end stop structure according to claim 6, characterized in that: The width of the flange (22) turned outward is 5-20 mm, or the height of the flange (22) turned outward is 10-30 mm.
8. The spindle end stop structure according to any one of claims 1 to 7, characterized in that: The second retaining ring (3) is welded to the bottom of the rotor (12).
9. The spindle end stop structure according to any one of claims 1 to 7, characterized in that: The first retaining ring (2) and the supporting seat (13) are an integrated structure, and / or the second retaining ring (3) and the rotor (12) are an integrated structure.
10. A vertical shaft impact sand making machine, characterized in that: A spindle end stop structure according to any one of claims 1 to 9 is adopted.