A PCD fixed shoe thrust bearing for a screw pump

Abstract

The present disclosure relates to the technical field of bearings, and one embodiment of the present disclosure provides a PCD fixed-pad thrust bearing for a screw pump, which comprises a mounting sleeve, a bearing plate is embedded in the mounting sleeve, a sliding splicing assembly is arranged in the interior of the mounting sleeve, and an assembly plug-in assembly is arranged on the mounting sleeve; the sliding splicing assembly comprises a limiting ring, a contact wheel is arranged in an opening, the contact wheel is in contact with the bearing plate, a splicing sleeve is arranged on the lower end face of the mounting sleeve, and the splicing sleeve is matched with the structure of the mounting sleeve. Through the above technical scheme, the technical problem that the conventional thrust bearing gradually exposes some insurmountable drawbacks when coping with the axial force of the screw pump is solved, for example, the bearing plate made of ordinary metal material has a relatively high abrasion rate under the condition of long-term bearing of a large axial force and frequent friction with the screw, which leads to a large reduction in the service life of the bearing, frequent replacement of the bearing increases the equipment maintenance cost, and seriously affects the continuity and stability of production.

Description

Technical Field

[0001] The embodiments of this disclosure relate to the field of bearing technology, and more specifically, to a PCD fixed bearing thrust bearing for a screw pump. Background Technology

[0002] When a screw pump is working, the driving screw rotates under the drive of the motor and meshes with the driven screw, forming multiple sealed chambers in the pump cavity. As the screw rotates, the sealed chambers move from the suction end to the discharge end. Under the action of pressure difference, the liquid is drawn in and pushed to the discharge end, achieving efficient and stable liquid transportation. However, during operation, the screw pump will face a series of complex working conditions and challenges. The axial force problem is one of the most critical aspects. As the liquid flows from the suction end to the discharge end in the screw pump, it will generate a large axial thrust on the screw. If this axial force is not effectively balanced and supported, it will cause many serious problems.

[0003] Traditional thrust bearings have gradually revealed some insurmountable drawbacks when dealing with the axial forces of screw pumps. For example, bearing plates made of ordinary metal materials wear out quickly under long-term exposure to large axial forces and frequent friction with the screw, resulting in a significant reduction in bearing life. Frequent bearing replacements not only increase equipment maintenance costs but also seriously affect the continuity and stability of production. At the same time, the large frictional force generated by sliding friction during the operation of traditional sliding bearings consumes a lot of energy, reducing the overall transmission efficiency of the screw pump and resulting in high energy consumption during equipment operation. Furthermore, in some application scenarios with extremely high requirements for equipment stability and operational precision, the structural design and performance of traditional bearings are insufficient to guarantee the accurate positioning and stable operation of the screw under high-speed rotation and complex and variable axial forces, thereby affecting the accuracy of the entire production process and product quality.

[0004] To effectively address the aforementioned issues and improve the operational performance and reliability of screw pumps under complex working conditions, the development of a new type of high-performance thrust bearing is urgently needed. Against this backdrop, the PCD fixed-blade thrust bearing for screw pumps has emerged. Its innovative structural design and material selection aim to significantly improve the load-bearing capacity for axial forces, reduce frictional losses, and enhance the operational stability of the equipment, providing a solid guarantee for the efficient, stable, and long-life operation of screw pumps in various industrial fields. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a PCD fixed bearing thrust bearing for screw pumps, which solves the problem that traditional thrust bearings in the prior art gradually reveal some insurmountable drawbacks when dealing with the axial force of screw pumps. For example, bearing plates made of ordinary metal materials wear out quickly under long-term exposure to large axial forces and frequent friction with the screw, resulting in a significant reduction in bearing life. Frequent bearing replacement not only increases equipment maintenance costs but also seriously affects the continuity and stability of production.

[0006] According to one aspect, at least one embodiment of this disclosure provides a PCD fixed bearing thrust bearing for a screw pump, comprising:

[0007] A mounting sleeve, wherein a bearing plate is embedded within the mounting sleeve;

[0008] A sliding splicing assembly is disposed inside the mounting sleeve;

[0009] Assemble the plug-in assembly, which is disposed on the mounting sleeve;

[0010] The sliding splicing assembly includes a limiting ring disposed on the inner sidewall of the mounting sleeve. The inner sidewall of the bearing plate is provided with an insert groove. A locking ring is embedded in the limiting ring. The inner sidewall of the locking ring is provided with a notch. A contact wheel is disposed in the notch. The contact wheel contacts the bearing plate. A splicing sleeve is disposed on the lower end face of the mounting sleeve. The structure of the splicing sleeve matches that of the mounting sleeve.

[0011] As a further technical solution, the splicing sleeve is provided with a screw groove, and the mounting sleeve is provided with a bolt hole. The bolt hole and the screw groove are positioned correspondingly and are connected to each other.

[0012] As a further technical solution, the assembly plug-in component includes a plug-in sleeve, which is disposed on the inner bottom surface of the splicing sleeve. A positioning shaft is provided on the bottom surface of the placement sleeve, and the positioning shaft is inserted into the interior of the plug-in sleeve. A through hole is opened on the limiting ring, and the positioning shaft is inserted into the through hole.

[0013] As a further technical solution, the inner sidewall of the plug sleeve is provided with a positioning ring groove, and the sidewall of the positioning shaft is provided with a positioning ring strip, the positioning ring strip being embedded inside the positioning ring groove.

[0014] As a further technical solution, the number of bearing plates is two, and the two bearing plates are respectively located at the upper and lower ends of the mounting sleeve, and wear-resistant plates are provided on the inner sidewall of the bearing plates.

[0015] As a further technical solution, the mounting sleeve and the splicing sleeve are fixed together by screws, and the splicing sleeve between the mounting sleeve and the splicing sleeve is fitted on the outside of the limiting ring.

[0016] As a further technical solution, a positioning ring is provided inside the mounting sleeve and the splicing sleeve, and the limiting ring is embedded inside the positioning ring.

[0017] As a further technical solution, the bearing plate has a connecting hole, and the bearing plate has a number of wear-resistant plates, with multiple wear-resistant plates evenly attached to the bearing plate.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] 1. In this disclosure, the wear-resistant plate attached to the inner side wall of the bearing plate cooperates with the limiting ring to form a low-friction interface. The self-lubricating properties of the wear-resistant plate can further reduce the direct wear between the bearing plate and the screw shaft. At the same time, the limiting ring, through the constraint of the locking ring and the contact wheel, ensures that the bearing plate maintains accurate positioning when moving axially, and avoids increased friction due to shaking.

[0020] 2. In this disclosure, the bearing plate is made of polycrystalline diamond material, which has a hardness second only to natural diamond and far higher than that of traditional metal bearing materials. This makes the bearing plate less prone to plastic deformation or wear when subjected to the strong axial thrust generated by the high-speed operation of the screw pump, and can greatly extend the service life of the bearing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0023] Figure 2 This is a cross-sectional view of the installation unit disclosed herein;

[0024] Figure 3 This is a cross-sectional view of the limiting ring disclosed herein;

[0025] Figure 4 This is a cross-sectional view of the plug-in sleeve disclosed herein;

[0026] Figure 5 This is a side view of the bearing plate disclosed herein;

[0027] In the diagram: 1. Mounting sleeve; 2. Bearing plate; 3. Sliding splicing assembly; 3-1. Limiting ring; 3-2. Insert groove; 3-3. Notch; 3-4. Bolt hole; 3-5. Locking ring; 3-6. Contact wheel; 3-7. Splicing sleeve; 3-8. Tightening groove; 4. Assembly plug-in assembly; 4-1. Plug-in sleeve; 4-2. Positioning shaft; 4-3. Through hole; 4-4. Positioning ring groove; 4-5. Positioning ring strip; 5. Wear-resistant plate; 6. Positioning ring; 7. Connecting hole. Detailed Implementation

[0028] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0029] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0030] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0031] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] like Figures 1-5 As shown, a PCD fixed bearing thrust bearing for a screw pump according to this disclosure is provided, comprising:

[0035] A mounting sleeve 1, wherein a bearing plate 2 is embedded in the mounting sleeve 1;

[0036] Sliding splicing component 3, wherein the sliding splicing component 3 is disposed inside the mounting sleeve 1;

[0037] Assemble the plug-in assembly 4, which is disposed on the mounting sleeve 1;

[0038] The sliding splicing assembly 3 includes a limiting ring 3-1, which is disposed on the inner side wall of the mounting sleeve 1. The inner side wall of the bearing plate 2 is provided with an insert groove 3-2. A locking ring 3-5 is embedded in the limiting ring 3-1. The inner side wall of the locking ring 3-5 is provided with a notch 3-3. A contact wheel 3-6 is disposed in the notch 3-3. The contact wheel 3-6 contacts the bearing plate 2. A splicing sleeve 3-7 is disposed on the lower end face of the mounting sleeve 1. The splicing sleeve 3-7 matches the structure of the mounting sleeve 1.

[0039] The assembly plug-in component 4 includes a plug-in sleeve 4-1, which is disposed on the inner bottom surface of the splicing sleeve 3-7. The bottom surface of the mounting sleeve 1 is provided with a positioning shaft 4-2, which is inserted into the interior of the plug-in sleeve 4-1. The limiting ring 3-1 has a through hole 4-3, and the positioning shaft 4-2 is inserted into the through hole 4-3.

[0040] In some examples, the limiting ring 3-1 is installed on the inner wall of the mounting sleeve 1. The installation position of the limiting ring 3-1 must be precise to ensure that it accurately matches the positioning structure (such as the groove) on the inner wall of the mounting sleeve 1. After installation, use measuring tools such as calipers to check the installation accuracy of the limiting ring 3-1 to ensure that its concentricity meets the design requirements.

[0041] Install a locking ring 3-5 on the limiting ring 3-1. The locking ring 3-5 is connected to the limiting ring 3-1 by being embedded. During the installation process, appropriate force needs to be used to press the locking ring 3-5 into the limiting ring 3-1 to ensure that the two are tightly connected without gaps. At the same time, pay attention to the direction of the notch 3-3 on the inner side wall of the locking ring 3-5. The notch 3-3 should face the bearing plate 2.

[0042] Install the contact wheel 3-6 inside the notch 3-3. The installation of the contact wheel 3-6 should ensure that it can rotate flexibly. You can first insert the shaft of the contact wheel 3-6 into the corresponding mounting hole of the notch 3-3, and then make adjustments to ensure that the contact wheel 3-6 can roll smoothly when subjected to external force and make close contact with the bearing plate 2 to achieve good sliding and support functions.

[0043] Install the insertion sleeve 4-1 on the inner bottom surface of the splicing sleeve 3-7. The insertion sleeve 4-1 should be installed to ensure that it is perpendicular to the bottom surface of the splicing sleeve 3-7 and is firmly installed. It can be fixed by welding or bolt connection. If welding is used, the welding current and welding time should be controlled to ensure the welding quality and avoid problems such as incomplete welding or missing welding. If bolt connection is used, the bolts should be tightened according to the specified torque to ensure the reliability of the connection.

[0044] The positioning shaft 4-2 is installed on the bottom surface of the mounting sleeve 1. The connection method between the positioning shaft 4-2 and the mounting sleeve 1 can be selected according to the actual situation, such as welding or interference fit. If an interference fit is used, the mating dimensions of the positioning shaft 4-2 and the mounting sleeve 1 must be accurately measured before installation to ensure that the interference meets the design requirements. During installation, a press or other equipment is used to slowly press the positioning shaft 4-2 into the corresponding hole on the bottom surface of the mounting sleeve 1 to ensure the perpendicularity and installation depth of the positioning shaft 4-2.

[0045] Insert the positioning shaft 4-2 into the insert sleeve 4-1, ensuring that the positioning shaft 4-2 is inserted into the through hole 4-3 on the limiting ring 3-1. During insertion, ensure the positioning shaft 4-2 is inserted in the correct direction to avoid jamming or damage to parts. Apply a suitable amount of lubricant to the mating surfaces of the positioning shaft 4-2, insert sleeve 4-1, and through hole 4-3 to reduce resistance during insertion.

[0046] like Figures 1-5 As shown in the figure, this embodiment proposes that the splicing sleeve 3-7 is provided with a screw groove 3-8, and the mounting sleeve 1 is provided with a bolt hole 3-4. The bolt hole 3-4 and the screw groove 3-8 are positioned correspondingly, and the bolt hole 3-4 and the screw groove 3-8 are connected.

[0047] In some examples, a screw groove 3-8 is provided on the splicing sleeve 3-7, and a bolt hole 3-4 is provided on the mounting sleeve 1. The positions of the two must correspond precisely and be connected. During the installation process, high-precision drilling equipment is used to ensure that the size and positional accuracy of the screw groove 3-8 and the bolt hole 3-4 meet the standards.

[0048] For example, such as Figure 4 As shown, the inner sidewall of the plug sleeve 4-1 is provided with a positioning ring groove 4-4, and the sidewall of the positioning shaft is provided with a positioning ring strip 4-5, which is embedded inside the positioning ring groove 4-4.

[0049] In some examples, a positioning ring groove 4-4 is provided on the inner side wall of the plug sleeve 4-1, and a positioning ring strip 4-5 is provided on the side wall of the positioning shaft. The positioning ring strip 4-5 is embedded inside the positioning ring groove 4-4. During installation, ensure that the positioning ring strip 4-5 is accurately embedded in the positioning ring groove 4-4 to achieve precise positioning and guiding functions.

[0050] For example, such as Figure 2 As shown, there are two bearing plates 2, which are located at the upper and lower ends of the mounting sleeve 1, respectively. Wear-resistant plates 5 are provided on the inner sidewall of the bearing plate 2.

[0051] In some examples, wear-resistant plate 5 is made of polycrystalline diamond material. Polycrystalline diamond material has the characteristics of low coefficient of friction, ultra-high wear resistance, and good dry friction performance, which effectively solves the above problems, greatly improves bearing life, and is suitable for use in harsh environments.

[0052] For example, such as Figure 3 As shown, the mounting sleeve 1 and the splicing sleeve 3-7 are fixed together by screws, and the splicing sleeve 3-7 is installed on the outside of the limiting ring 3-1.

[0053] In some examples, during installation, the splicing sleeve 3-7 is aligned with the lower end face of the mounting sleeve 1 and screwed in place. Before screwing in the screws, it is important to ensure that the splicing sleeve 3-7 and the mounting sleeve 1 are accurately positioned. This can be achieved by using pre-set positioning pins or positioning grooves. When screwing in the screws, tighten them diagonally to ensure that the connection between the splicing sleeve 3-7 and the mounting sleeve 1 is uniform and tight, and to avoid any misalignment.

[0054] For example, such as Figure 3 As shown, the placement sleeve 1 and the splicing sleeve 3-7 are provided with a positioning ring 6 inside, and the limiting ring 3-1 is embedded inside the positioning ring 6.

[0055] In some examples, a positioning ring 6 is installed inside the mounting sleeve 1 and the splicing sleeve 3-7, with the limiting ring 3-1 embedded inside the positioning ring 6. When installing the positioning ring 6, attention should be paid to its installation position and orientation to ensure that the limiting ring 3-1 can be accurately embedded in the positioning ring 6, and that the positioning ring 6 can provide good positioning and fixation for the limiting ring 3-1.

[0056] For example, such as Figure 1 As shown, the bearing plate 2 has a connecting hole 7, and there are several wear-resistant plates 5 on the bearing plate 2. The multiple wear-resistant plates 5 are evenly attached to the bearing plate 2.

[0057] In some examples, the connecting hole 7 is used for inserting the bearing plate 2 into the drive shaft.

[0058] During operation, the screw pump generates axial thrust. This axial force first acts on the bearing plate 2, which is usually made of PCD (polycrystalline diamond) material. This material has high hardness and high wear resistance, and can effectively withstand axial force. Since there are usually two bearing plates 2, located at the upper and lower ends of the mounting sleeve 1 respectively, they can bear the axial force from two directions, enhancing stability. The mounting sleeve 1 plays the role of supporting and fixing the bearing plate 2, and further transmitting the axial force borne by the bearing plate 2 to the entire bearing system.

[0059] The limiting ring 3-1 is installed on the inner wall of the mounting sleeve 1 to limit the radial displacement of the bearing plate 2, ensuring its stable operation. When axial force is applied to the bearing plate 2, the bearing plate 2 will have a certain tendency to displace under force. At this time, the locking ring 3-5, which cooperates with the mounting groove 3-2 on the inner wall of the bearing plate 2, plays its role. The contact wheel 3-6 in the notch 3-3 on the inner wall of the locking ring 3-5 contacts the bearing plate 2. When the bearing plate 2 has a tendency to displace due to axial force, the contact wheel 3-6 can roll flexibly, converting sliding friction into rolling friction, which greatly reduces the friction force. When bearing plate 2 is subjected to axial force, it can make slight displacement adjustments within the mounting sleeve 1 relatively smoothly to better adapt to changes in axial force and ensure the smooth operation of the bearing. At the same time, the splicing sleeve 3-7 on the lower end face of the mounting sleeve 1 matches the mounting sleeve 1 and is fixed together by screwing. The screwing groove 3-8 on the splicing sleeve 3-7 corresponds to and is connected to the bolt hole 3-4 on the mounting sleeve 1. This structural design makes it convenient to operate the screw by inserting a tool into the screwing groove 3-8 during installation and maintenance, so as to achieve a tight connection or disassembly between the splicing sleeve 3-7 and the mounting sleeve 1.

[0060] The positioning shaft 4-2 on the bottom surface of the mounting sleeve 1 cooperates with the insertion sleeve 4-1 on the inner bottom surface of the splicing sleeve 3-7. The positioning shaft 4-2 is inserted into the insertion sleeve 4-1 and also into the through hole 4-3 on the limiting ring 3-1, which plays a precise positioning and guiding role, ensuring that the relative positions of each component are accurate during installation and ensuring the concentricity of the entire bearing system. This allows the bearing to maintain good stability during operation. In addition, the positioning ring groove 4-4 on the inner side wall of the insertion sleeve 4-1 and the positioning ring strip 4-5 on the side wall of the positioning shaft 4-2 are interlocked, further enhancing the positioning accuracy and reliability. This prevents relative rotation or offset between the positioning shaft 4-2 and the insertion sleeve 4-1 under axial force, ensuring that the axial force can be stably transmitted and carried.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A PCD fixed bearing thrust bearing for a screw pump, characterized in that, include: A mounting sleeve (1) is provided, wherein a bearing plate (2) is embedded in the mounting sleeve (1); A sliding splicing component (3) is disposed inside the mounting sleeve (1); Assemble the plug-in assembly (4), which is disposed on the mounting sleeve (1); The sliding splicing assembly (3) includes a limiting ring (3-1), which is disposed on the inner side wall of the mounting sleeve (1). The inner side wall of the bearing piece (2) is provided with an insert groove (3-2). A locking ring (3-5) is embedded in the limiting ring (3-1). The inner side wall of the locking ring (3-5) is provided with a notch (3-3). A contact wheel (3-6) is disposed in the notch (3-3). The contact wheel (3-6) contacts the bearing piece (2). A splicing sleeve (3-7) is disposed on the lower end face of the mounting sleeve (1). The splicing sleeve (3-7) matches the structure of the mounting sleeve (1).

2. The PCD fixed bearing thrust bearing for a screw pump according to claim 1, characterized in that, The splicing sleeve (3-7) is provided with a screw groove (3-8), and the mounting sleeve (1) is provided with a bolt hole (3-4). The bolt hole (3-4) and the screw groove (3-8) are positioned correspondingly, and the bolt hole (3-4) and the screw groove (3-8) are connected.

3. The PCD fixed bearing thrust bearing for a screw pump according to claim 1, characterized in that, The assembly plug-in component (4) includes a plug-in sleeve (4-1), which is disposed on the inner bottom surface of the splicing sleeve (3-7). The bottom surface of the placement sleeve (1) is provided with a positioning shaft (4-2), which is inserted into the interior of the plug-in sleeve (4-1). The limiting ring (3-1) has a through hole (4-3), and the positioning shaft (4-2) is inserted into the through hole (4-3).

4. The PCD fixed bearing thrust bearing for a screw pump according to claim 3, characterized in that, The inner wall of the plug sleeve (4-1) is provided with a positioning ring groove (4-4), and the side wall of the positioning shaft (4-2) is provided with a positioning ring strip (4-5), which is embedded in the interior of the positioning ring groove (4-4).

5. A PCD fixed bearing thrust bearing for a screw pump according to claim 1, characterized in that, The number of bearing plates (2) is two, and the two bearing plates (2) are located at the upper and lower ends of the mounting sleeve (1) respectively. The inner sidewall of the bearing plate (2) is provided with wear-resistant plates (5).

6. The PCD fixed bearing thrust bearing for a screw pump according to claim 1, characterized in that, The mounting sleeve (1) and the splicing sleeve (3-7) are fixed together by screws. The splicing sleeve (3-7) is installed on the outside of the limiting ring (3-1).

7. A PCD fixed bearing thrust bearing for a screw pump according to claim 1, characterized in that, The placement sleeve (1) and the splicing sleeve (3-7) are provided with a positioning ring (6), and the limiting ring (3-1) is embedded inside the positioning ring (6).

8. A PCD fixed bearing thrust bearing for a screw pump according to claim 5, characterized in that, The bearing plate (2) has a connecting hole (7), and there are several wear-resistant plates (5) on the bearing plate (2), with multiple wear-resistant plates (5) evenly attached to the bearing plate (2).

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