A quick and safe installation device for low temperature pump DU bearing
Patent Information
- Application Number
- CN202522621201.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-10
AI Technical Summary
[0003]低温泵本体重量通常可达五十公斤，传统人工安装方式主要依赖维修人员将泵体翻转或倾斜，将轴承放置在安装孔上，再通过手锤敲击的方式将DU轴承内，DU轴承需人工精确对中，敲击压入耗费大量时间，整体维修周期长，泵体重量大，翻转、支撑和敲击均需消耗大量体力，尤其在狭小空间或高空作业时更为困难，操作中易因人力翻转不均导致泵体坠翻，或因手锤敲击产生挤压、碰撞，可能伤及操作人员；此外，轴承在未准确对中时容易卡滞或偏入，进一步增加损伤和事故风险
采用调节螺杆与进给螺母组成的丝杠传动机构，将旋转运动转化为轴向推力，使DU轴承能够平稳、精确地压入低温泵安装孔。相比传统人工敲击方式，可以提高安装效率，缩短维修周期；
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Figure CN224914645U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of profile sintering equipment, specifically a rapid and safe installation device based on a cryogenic pump DU bearing. Background Technology
[0002] In outdoor profile sintering maintenance, the cryogenic pump is a key hydraulic component in the sintering system, and its normal operation depends on the stable function of its internal DU bearing. As a crucial support element between the cryogenic pump rotor and the pump body, the DU bearing bears the radial guidance of the pump shaft and the rotational load. During maintenance, due to prolonged operation or wear, the DU bearing needs to be disassembled and replaced to restore the cryogenic pump's normal rotational accuracy and hydraulic efficiency. Therefore, the installation of the cryogenic pump DU bearing is a vital step in ensuring equipment performance, extending service life, and guaranteeing safe system operation.
[0003] Cryogenic pumps typically weigh up to 50 kilograms. Traditional manual installation methods rely on maintenance personnel to flip or tilt the pump body, place the bearing on the mounting hole, and then hammer it in. The DU bearing requires precise manual alignment and hammering, which takes a lot of time and results in a long overall maintenance cycle. The pump body is heavy, and flipping, supporting, and hammering all require a lot of physical strength, which is especially difficult in confined spaces or when working at heights. During operation, uneven manual flipping can cause the pump body to tip over, or the hammering can cause squeezing or collisions, potentially injuring the operator. In addition, if the bearing is not accurately aligned, it is easy to get stuck or misaligned, further increasing the risk of damage and accidents. Utility Model Content
[0004] The purpose of this invention is to provide a fast and safe installation device based on a cryogenic pump DU bearing, so as to solve at least one aspect of the problems and defects mentioned in the background art.
[0005] A rapid and safe installation device for a cryogenic pump DU bearing is provided, comprising an adjusting screw threadedly connected inside a positioning plate, the positioning plate being engaged with a cryogenic pump mounting hole, the end of the adjusting screw slidably connected to the positioning plate at the end away from the positioning plate, and a locking assembly provided on the upper part of the feed plate for locking the feed plate.
[0006] Furthermore, the positioning plate is provided with a snap-fit part, which snaps into the inlet of the cryogenic pump mounting hole.
[0007] Furthermore, the inner diameter of the snap-fit portion matches the diameter of the cryogenic pump mounting hole.
[0008] Furthermore, a feed nut is provided on one side of the positioning plate, and the feed nut is threadedly connected to the adjusting screw.
[0009] Furthermore, a planar bearing is also provided between the feed nut and the positioning plate.
[0010] Furthermore, the locking assembly includes two locking nuts, which are disposed on both sides of the feed pressure plate.
[0011] Furthermore, the positioning plate has a first mounting hole inside, and an adjusting screw is installed inside the first mounting hole.
[0012] Furthermore, the feed plate is provided with a second mounting hole, and an adjusting screw is provided in the second mounting hole.
[0013] Furthermore, the feed plate is provided with an annular limiting step on the outside, which is used to engage the DU bearing.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: A screw drive mechanism consisting of an adjusting screw and a feed nut converts rotational motion into axial thrust, enabling the DU bearing to be smoothly and precisely pressed into the cryogenic pump mounting hole. Compared to traditional manual tapping, this improves installation efficiency and shortens maintenance cycles. The device cleverly utilizes the original mounting holes of the pump body for positioning, eliminating the need to flip or lift the 50 kg pump body. Operators can complete the pressing process simply by adjusting the screw, reducing physical exertion. It is suitable for working in confined spaces. The positioning pressure plate and the ring-shaped limiting step achieve precise axial and radial positioning. The feed pressure plate is evenly stressed along the hole axis, ensuring that the DU bearing is pressed in along the center line, avoiding eccentricity, jamming, or damage to the pump body hole wall, and reducing damage caused by misalignment and impact installation. The overall structure uses the original mounting holes of the pump body as positioning and support points, reducing the risk of pump body tipping, bearing slippage, or impact injuries, effectively reducing the risk of personnel injury and improving the safety of maintenance operations. Attached Figure Description
[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a schematic diagram of the installation state cross-sectional structure of a rapid and safe installation device based on a cryogenic pump DU bearing. Figure 2 A schematic diagram of the overall three-dimensional structure provided for this utility model; Figure 3 A schematic diagram of the positioning pressure plate structure provided by this utility model; Figure 4 This is a schematic diagram of the feed pressure plate structure provided by this utility model.
[0017] In the diagram: 1. Adjusting screw; 2. Positioning plate; 21. Snap-fit part; 22. First mounting hole; 3. Feed plate; 31. Second mounting hole; 32. Annular limiting step; 4. Locking assembly; 41. Locking nut; 5. Feed nut; 6. Surface bearing; 100. Cryogenic pump mounting hole; 101. DU bearing. Detailed Implementation
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0024] Please see Figure 1-4 As shown in the embodiment of this utility model, a quick and safe installation device based on the DU bearing of a cryogenic pump is provided. The adjusting screw 1 is threadedly connected to the inside of the positioning plate 2. The positioning plate 2 is snapped into the cryogenic pump mounting hole 100. The end of the adjusting screw 1 away from the positioning plate 2 is slidably connected to the feed plate 3. The upper part of the feed plate 3 is provided with a locking component 4, which is used to lock the feed plate 3. The installation device utilizes a screw-nut transmission structure formed by a positioning plate 2, an adjusting screw 1, and a feed plate 3 to achieve stable insertion of the DU bearing 101 within the confined space of the cryogenic pump. The positioning plate 2 has a positioning platform on its outer side that matches the cryogenic pump mounting hole 100, allowing it to be securely engaged at the inlet of the cryogenic pump mounting hole 100, providing an axial reaction force reference and a coaxial positioning reference for the entire device. The threaded section of the adjusting screw 1 engages with the threaded hole inside the positioning plate 2, enabling the adjusting screw 1 to reliably move axially relative to the positioning plate 2. The smooth section at the front end of the adjusting screw 1 slides through the feed plate 3, allowing the feed plate 3 to move freely along the axial direction of the adjusting screw 1. A locking assembly 4, consisting of double nuts on both sides, is installed above the feed plate 3. After the DU bearing 101 is fitted onto the ∮78 platform of the feed plate 3 and placed in the ∮80 opening, the position of the feed plate 3 is fixed by a counter-locking mechanism. The axis of the DU bearing 101 is precisely aligned with the positioning plate 2. Then, the feed nut on the front of the positioning plate 2 is tightened, which pulls the adjusting screw 1 axially toward the positioning plate 2. This drives the feed plate 3 to smoothly advance the DU bearing 101 into the ∮80 hole of the cryogenic pump. The rotational motion of the adjusting screw 1 is converted into a smooth and controllable linear pressing force through the threaded pair, allowing the DU bearing 101 to be evenly inserted into the hole under the guidance constraint, reducing damage caused by misalignment and hammering installation. The overall structure uses the original mounting holes of the pump body as positioning and support points, enabling the DU bearing 101 to be pressed quickly, accurately, and safely without large equipment. Compared with the traditional manual hammering method, it can improve installation efficiency and shorten the maintenance cycle. The locking component 4 fixes the position of the feed plate 3. The entire device is structurally stable during operation, reducing the risk of pump body tipping, bearing slippage, or hammering damage, effectively reducing the risk of personnel injury and improving the safety of maintenance operations.
[0025] In one embodiment, see Figure 1 , Figure 2 and Figure 3As shown, the positioning plate 2 is provided with a snap-fit part 21, which snaps into the inlet of the cryogenic pump mounting hole 100. The snap-fit portion 21 on the positioning plate 2 matches the structural dimensions of the inlet of the cryogenic pump mounting hole 100. During device installation, it can be directly embedded or fitted to the end face and inner edge of the cryogenic pump mounting hole 100, forming a stable mechanical positioning reference. The principle is to use the original ∮60 orifice of the cryogenic pump body as a reaction support point. The radial and axial bidirectional positioning of the device is achieved through the contact between the annular limiting surface of the snap-fit portion 21 and the inlet of the cryogenic pump mounting hole 100. On the one hand, the outer diameter of the snap-fit portion 21 is machined with the inner diameter of the inlet of the cryogenic pump mounting hole 100 according to the transition fit or clearance fit, so that the positioning plate 2 does not produce obvious wobbling in the radial direction, ensuring that the movement direction of the adjusting screw 1 and the feed plate 3 remains coaxial with the hole axis. On the other hand, the axial limiting shoulder provided by the snap-fit portion 21 can abut against the end face of the mounting hole inlet, so that the positioning plate 2 does not undergo axial displacement when force is applied, thereby providing reliable reaction support for the adjusting screw 1 to drive the press-fit DU bearing 101.
[0026] In one specific embodiment, please refer to Figure 1 , Figure 2 and Figure 3 As shown, the inner diameter of the snap-fit part 21 matches the diameter of the cryogenic pump mounting hole 100. The inner diameter of the snap-fit part 21 is machined to a transition or small clearance fit according to the actual diameter of the cryogenic pump mounting hole 100. During installation, the snap-fit part 21 can smoothly fit into the inner edge of the hole, and its circumferential surface forms uniform contact with the hole wall. This not only achieves radial limiting but also effectively suppresses the wobble caused by force, ensuring that the positioning pressure plate 2 always remains aligned with the pump body hole axis. Since the press-fit of the DU bearing 101 requires high coaxiality, the precise inner diameter matching provided by the snap-fit part 21 enables the adjusting screw 1 and the feed pressure plate 3 to obtain a stable axial guide path, ensuring that the press-fit force is completely transmitted along the axis and avoiding bearing damage or hole wall scratches caused by skewed press-fit.
[0027] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, a feed nut 5 is also provided on one side of the positioning plate 2, and the feed nut 5 is threadedly connected to the adjusting screw 1; The outer surface of the adjusting screw 1 is machined with a standard thread section. The feed nut 5 uses an internal thread that matches its thread specification and is positioned at a certain position outside the positioning plate 2. After the device is installed and the feed plate 3 and DU bearing 101 are adjusted to the appropriate positions, the operator rotates the feed nut 5 manually or with a wrench. As the nut 5 rotates along the adjusting screw 1, the threaded pair converts the rotational torque into axial thrust, causing the adjusting screw 1 to move gradually towards the positioning plate 2, thereby driving the feed plate 3 to stably press the DU bearing 101 into the ∮80 hole. Throughout the process, due to the self-locking characteristic of the threaded engagement, the feed nut 5 can maintain a stressed state without reversing in any position, thus ensuring a safe and reliable pressing process.
[0028] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, a plane bearing 6 is also provided between the feed nut 5 and the positioning plate 2. Its core principle is to replace sliding friction with rolling friction to reduce rotational resistance, so that the feed nut 5 can rotate smoothly and easily during the transmission of the adjusting screw 1, and ensure that the force is more stable and uniform when pressing the DU bearing 101.
[0029] In one embodiment, see Figure 1 , Figure 2 and Figure 4 As shown, the locking assembly 4 includes two locking nuts 41, which are disposed on both sides of the feed platen 3. The two locking nuts 41 are respectively disposed on the front and rear sides of the feed platen 3. The feed platen 3 is locked along the axial position of the adjusting screw 1 by relative tightening, so as to prevent slippage or displacement during the pressing of the DU bearing 101 and ensure pressing accuracy.
[0030] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the positioning plate 2 has a first mounting hole 22 inside, and an adjusting screw 1 is provided in the first mounting hole 22. The rod of the adjusting screw 1 is inserted into the first mounting hole 22, and axial movement is achieved by the threaded section cooperating with the corresponding external nut or internal thread structure.
[0031] In one embodiment, see Figure 1 , Figure 2 and Figure 4As shown, the feed plate 3 has a second mounting hole 31 inside, and an adjusting screw 1 is installed in the second mounting hole 31. The adjusting screw 1 moves axially in the second mounting hole 31 under the user's rotation. After adjustment, two locking nuts 41 are used to lock both sides of the feed plate 3 on the adjusting screw 1. After adjustment, the double locking nuts 41 lock both sides of the feed plate 3 respectively, fixing the plate on the adjusting screw 1. The locking nuts 41 prevent the adjusting screw 1 from reversing due to vibration or external force, ensuring the axial position of the feed plate 3 remains stable throughout the pressing process.
[0032] In one embodiment, see Figure 1 , Figure 2 and Figure 4 As shown, an annular limiting step 32 is provided on the outside of the feed pressure plate 3. The annular limiting step 32 is used to clamp the DU bearing 101. The annular limiting step 32 is machined into an annular flange along the outer periphery of the feed pressure plate 3, and its inner diameter is slightly larger than or matches the outer diameter of the outer ring of the DU bearing 101. During the installation of the DU bearing 101, the outer ring of the DU bearing 101 can be fitted into the annular limiting step 32. The annular step restricts the movement range of the bearing axially, thereby achieving axial positioning. At the same time, the annular limiting step 32 and the bearing contact surface form uniform support circumferentially, preventing the bearing from tilting or eccentric during press-fitting.
[0033] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.
Claims
1. A quick and safe installation device based on a cryogenic pump DU bearing, comprising an adjusting screw (1), characterized in that, The adjusting screw (1) is threaded inside the positioning plate (2), the positioning plate (2) is snapped into the low temperature pump mounting hole (100), the end of the adjusting screw (1) away from the positioning plate (2) is slidably connected to the feed plate (3), the upper part of the feed plate (3) is provided with a locking component (4), the locking component (4) is used to lock the feed plate (3).
2. The rapid and safe installation device based on the cryogenic pump DU bearing according to claim 1, characterized in that, The positioning plate (2) is provided with a snap-fit part (21), which snaps into the inlet of the cryogenic pump mounting hole (100).
3. The rapid and safe installation device based on the cryogenic pump DU bearing according to claim 2, characterized in that, The inner diameter of the snap-fit part (21) matches the diameter of the cryogenic pump mounting hole (100).
4. The rapid and safe installation device for a cryogenic pump DU bearing according to claim 2, characterized in that, The positioning plate (2) is also provided with a feed nut (5) on one side, and the feed nut (5) is threadedly connected to the adjusting screw (1).
5. The rapid and safe installation device based on the cryogenic pump DU bearing according to claim 4, characterized in that, A plane bearing (6) is also provided between the feed nut (5) and the positioning plate (2).
6. The rapid and safe installation device based on the cryogenic pump DU bearing according to claim 1, characterized in that, The locking assembly (4) includes two locking nuts (41), which are disposed on both sides of the feed plate (3).
7. The rapid and safe installation device based on the cryogenic pump DU bearing according to claim 1, characterized in that, The positioning plate (2) has a first mounting hole (22) inside, and an adjusting screw (1) is provided inside the first mounting hole (22).
8. A rapid and safe installation device for a cryogenic pump DU bearing according to claim 1, characterized in that, The feed plate (3) is provided with a second mounting hole (31), and an adjusting screw (1) is provided in the second mounting hole (31).
9. A rapid and safe installation device for a cryogenic pump DU bearing according to claim 8, characterized in that, The feed platen (3) is provided with an annular limiting step (32) on the outside, which is used to engage the DU bearing (101).