Pump unit convenient to disassemble and assemble

Abstract

The utility model discloses a pump unit convenient to disassemble and assemble, and belongs to the field of pump units. The bearing seat comprises a main body part, the main body part is further provided with an annular inner extending part which extends in the axial direction and extends into a pressure-resistant cylinder in a matched mode on the outer side of a shaft hole, the peripheral edge of the main body part is provided with an outer edge part, and the tail end of the pressure-resistant cylinder is arranged on the periphery of the inner extending part in a sleeved mode and abuts against the outer edge part from one side. And a fastener is arranged between the outer edge part of the bearing seat and the end cover part of the engine base, penetrates through the end cover part along the radial direction and extends into the outer edge part. According to the utility model, the bearing seat is limited in the axial direction by using the fastener, so that the bearing seat and the engine base are fixed into a whole, and when the pressure-resistant cylinder is pulled, the bearing seat cannot axially move along with the pressure-resistant cylinder, so that the independent disassembly freedom of the pressure-resistant cylinder is ensured, and the application is very convenient.

Description

Technical Field

[0001] This utility model relates to the field of pump unit technology, and more specifically, to a pump unit that is easy to disassemble and assemble. Background Technology

[0002] The main components of a traditional pump include a base and a pressure-resistant cylinder. The base houses the motor stator assembly, rotor assembly, and motor shaft, while the pressure-resistant cylinder contains key flow-through components such as the impeller. A bearing housing connects the pressure-resistant cylinder and the base. The motor shaft is rotatably mounted in the center of the bearing housing, and the pressure-resistant cylinder is typically fitted onto the outer side of the bearing housing end, pressed tightly against the base end using a tight fit or interference fit to ensure the overall structural sealing and rigidity.

[0003] However, in practice, maintenance personnel have found that due to the tight fit between the pressure cylinder and the bearing housing, often using an interference fit, disassembling the pressure cylinder during maintenance often results in the simultaneous detachment of the pressure cylinder and the bearing housing. This causes the bearing housing, which doesn't need to be disassembled, to also detach from the machine base, making independent disassembly and assembly of the pressure cylinder difficult. This affects the equipment's disassembly flexibility and maintenance freedom, especially when replacing the pressure cylinder individually or repairing internal components such as the impeller, making the operation cumbersome and increasing maintenance costs and time. Furthermore, frequent overall disassembly can cause wear on the mating surfaces of the bearing housing and the machine base, further reducing the equipment's service life. Therefore, achieving rapid and independent disassembly and assembly of the pressure cylinder would significantly improve the maintainability and ease of operation of the equipment.

[0004] For example, patent CN218624749U discloses a pressure-resistant cylinder limiting device, which includes an end cap and a pressure-resistant cylinder. The pressure-resistant cylinder is provided with a limiting component one, and the end cap is provided with a limiting component two. The limiting component two is used to prevent the limiting component one from moving, thereby limiting the pressure-resistant cylinder. However, this design focuses on reducing the rotation amplitude of the pressure-resistant cylinder, and a sealing ring is provided between the pressure-resistant cylinder and the bearing seat. The sealing ring is more likely to deform under pressure, leading to tight contact between the pressure-resistant cylinder and the bearing seat, making it more difficult to disassemble the pressure-resistant cylinder independently. Utility Model Content

[0005] 1. Technical problem to be solved by the utility model

[0006] The purpose of this utility model is to overcome the inconvenience of independently disassembling the pressure-resistant cylinder in the existing pump body structure, and to provide a pump unit that is easy to disassemble and assemble. The installation method of this design can effectively ensure the flexibility and freedom of disassembly of each component, making it very convenient to use and with low production cost, which is conducive to its widespread application.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] This utility model provides a pump unit that is easy to assemble and disassemble, comprising:

[0010] The base has an end cover at its front end, and an installation area for embedding a pressure-resistant cylinder is formed inside the end cover.

[0011] A pressure-resistant cylinder, the tail end of which is fitted into the mounting area;

[0012] The bearing housing is installed between the machine base and the pressure-resistant cylinder, and is pressed by the tail end of the pressure-resistant cylinder into the mounting area of ​​the end cover.

[0013] The bearing housing includes a main body, the center of which is provided with a shaft hole for mounting the motor shaft; the main body is also provided with an annular inner extension extending axially and fitting into the interior of the pressure-resistant cylinder on the outside of the shaft hole; the outer peripheral edge of the main body has an outer edge; the tail end of the pressure-resistant cylinder is sleeved on the outer periphery of the inner extension and abuts against the outer edge from one side.

[0014] A fastener is provided between the outer edge of the bearing housing and the end cover of the machine base. The fastener passes radially through the end cover and extends into the interior of the outer edge.

[0015] Furthermore, the fastener passes through the end cap and extends to securely connect with the outer edge;

[0016] Or / and, the fastener is securely connected to the end cap and extends through the end cap into the interior of the outer edge.

[0017] Furthermore, the fastener has a threaded section, the end cap has a radially penetrating fixing hole, and the outer edge has a corresponding matching connecting hole. The connecting hole and / or fixing hole are threaded holes that are threaded together with the fastener for fastening.

[0018] Furthermore, the fastener is a fixing pin, with a radially penetrating fixing hole on the end cap and a corresponding connecting hole on the outer edge. The fastener fits through the connecting hole and the fixing hole.

[0019] Furthermore, the outer edge is provided with a connecting platform that moves axially toward the tail end of the pressure-resistant cylinder, and the connecting platform is located outside the outer wall of the pressure-resistant cylinder. The fastener passes through the end cap and extends into the corresponding interior of the connecting platform, and the tail end of the fastener does not contact the outer wall of the pressure-resistant cylinder.

[0020] Furthermore, the outer periphery of the tail end of the pressure-resistant cylinder is provided with an outwardly protruding edge ring, and the edge ring is provided with an installation groove corresponding to the position of the connecting platform. The connecting platform on the bearing seat is embedded into the installation groove of the pressure-resistant cylinder.

[0021] Furthermore, the fastener has a threaded section, the end cap has a radially penetrating fixing hole, and the connecting platform has a corresponding matching connecting hole. The connecting hole and / or fixing hole are threaded holes, which are threaded and fastened to the fastener.

[0022] Furthermore, the end cover of the base is provided with multiple sets of fixing holes evenly spaced along the circumference, and multiple sets of fasteners are provided accordingly.

[0023] Furthermore, a sealing ring is provided between the outer wall of the inner extension of the bearing housing and the inner wall of the pressure-resistant cylinder.

[0024] Furthermore, a sealing groove is provided around the outer wall surface of the inner extension of the bearing housing, and a sealing ring is installed in the sealing groove.

[0025] 3. Beneficial effects

[0026] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0027] (1) The pump unit of this utility model limits the bearing housing in the axial direction by setting fasteners that penetrate the end cover in the radial direction and extend into the outer edge of the bearing housing, so that the bearing housing and the base are fixed together. When the pressure cylinder is pulled out, it will not move axially with the pressure cylinder, thus ensuring the independent disassembly freedom of the pressure cylinder. It is very convenient to use and has a low production cost.

[0028] (2) The pump unit of this utility model has a connecting platform on the outer edge of the bearing seat to install fasteners, which can effectively ensure stability and installation strength. The mounting groove is set at the tail end of the pressure cylinder to cooperate with the connecting platform for guidance and insertion. At the same time, the axial installation of the pressure cylinder is guided and limited to prevent it from circumferentially deflecting, ensuring the accuracy of the installation position and the positional stability of the pressure cylinder under long-term use. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the pump unit in the embodiment;

[0030] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the pump unit in the embodiment;

[0031] Figure 3 for Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0032] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the pump body after removing internal components;

[0033] Figure 5 for Figure 4 A magnified schematic diagram of the local structure at point B;

[0034] Figure 6 This is a schematic diagram of the pressure-resistant cylinder in the embodiment;

[0035] Figure 7This is a schematic diagram of the bearing housing structure in the embodiment;

[0036] Figure 8 This is a schematic diagram of the base structure in the embodiment.

[0037] Explanation of the labels in the diagram:

[0038] 100. Base; 101. End cover; 102. Fixing hole; 110. Bearing seat; 111. Connecting platform; 112. Connecting hole; 113. Outer edge; 114. Inner extension; 120. Fastener;

[0039] 200, Pressure-resistant cylinder; 201, Edge ring; 202, Mounting groove. Detailed Implementation

[0040] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0041] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation 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.

[0042] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. The terms "first," "second," "third," and "fourth" should also be interpreted broadly, merely distinguishing feature names and not indicating a specific sequential relationship. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The present invention will be further described below with reference to the embodiments.

[0044] Example

[0045] Combination Figures 1-8 As shown, a pump unit that is easy to assemble and disassemble according to this embodiment includes:

[0046] The base 100 has an end cover 101 at its front end, and an installation area for embedding the pressure-resistant cylinder 200 is formed in the end cover 101.

[0047] The pressure-resistant cylinder 200 has its tail end fitted into the mounting area.

[0048] The bearing housing 110 is installed between the machine base 100 and the pressure cylinder 200, and is pressed by the tail end of the pressure cylinder 200 into the mounting area of ​​the end cover portion 101;

[0049] More specifically, combined Figure 1 and Figure 2 As shown, a motor shaft is installed in the center of the base 100, and components such as a rotor assembly and a stator assembly are located on the outside of the motor shaft. When the pump unit is a canned motor pump, a shielding sleeve is also provided inside the base 100 to isolate the rotor assembly from the stator assembly. The front end of the base 100 has an end cover 101 for mounting and fixing with the pressure-resistant cylinder 200. Figures 4-7 As shown, the bearing housing 110 includes a main body 115, with a shaft hole at the center of the main body 115 for mounting the motor shaft; the main body 115 also has an annular inner extension 114 extending axially and fitting into the interior of the pressure-resistant cylinder 200 outside the shaft hole; the outer peripheral edge of the main body 115 has an outer edge 113; the tail end of the pressure-resistant cylinder 200 is sleeved on the outer periphery of the inner extension 114 and abuts against the outer edge 113 from one side; a fastener 120 is provided between the outer edge 113 of the bearing housing 110 and the end cover 101 of the base 100; the fastener 120 passes radially through the end cover 101 and extends into the interior of the outer edge 113.

[0050] Combination Figures 2-4 As shown, the inner extension 114 of the bearing housing 110 is fitted into the end of the pressure-resistant cylinder 200 and fits tightly with the inner wall of the pressure-resistant cylinder 200. During installation, the pressure-resistant cylinder 200 presses inward to press the bearing housing 110 against the inner side of the end cover 101 of the machine base 100 for fixation. During long-term use, when it is necessary to remove the pressure-resistant cylinder 200, it is often pulled outward. Since the bearing housing 110 is fixed by the pressure-resistant cylinder 200 pressing against it, and the pressure-resistant cylinder 200 fits tightly with the bearing housing 110, it is difficult to separate the pressure-resistant cylinder 200 from the bearing housing 110. It is easy to pull the bearing housing 110 together with the pressure-resistant cylinder 200 out of the machine base 100, making it difficult to flexibly and independently disassemble and assemble the pressure-resistant cylinder 200, which causes great inconvenience to production practice. Furthermore, to improve pump delivery efficiency, reduce water leakage losses, and ensure a tight seal between the pressure-resistant cylinder 200 and the bearing housing 110, a sealing ring is preferably provided around the outer wall of the inner extension 114 of the bearing housing 110 and the inner wall of the pressure-resistant cylinder 200. Specifically, as follows... Figure 3As shown, a sealing groove is preferably provided around the outer wall of the inner extension 114 of the bearing housing 110, and a sealing ring is installed in the sealing groove. Due to long-term use, the sealing ring is deformed by compression and adheres tightly to the outer wall of the inner extension 114 and the inner wall of the pressure-resistant cylinder 200, generating a significant adsorption force. This further adsorbs the bearing housing 110 and the pressure-resistant cylinder 200 into one unit, making them even more difficult to separate independently, resulting in the bearing housing 110 being pulled along with the cylinder.

[0051] This embodiment effectively alleviates the above-mentioned problems by providing radially extending fasteners 120. Combined with... Figure 3 The fastener 120 penetrates radially through the end cap 101 of the base 100 and extends downward into the outer edge 113 of the bearing housing 110, thereby limiting the end cap 101 and the bearing housing 110 in the axial direction, fixing the bearing housing 110 and the end cap 101 of the base 100 into one piece. When the pressure-resistant cylinder 200 is pulled out, due to the limiting effect of the fastener 120, the bearing housing 110 always remains integrally connected with the end cap 101, overcoming the adsorption force between the bearing housing 110 and the pressure-resistant cylinder 200, and will not move axially with the pressure-resistant cylinder 200, thereby ensuring the independent disassembly of the pressure-resistant cylinder 200. Furthermore, the pressure-resistant cylinder 200 is pressed against and tightened axially inward from the side of the outer edge 113, while the fastener 120 extends radially and is fixed accordingly at the outer edge 113 of the bearing seat 110. This does not affect the normal axial assembly and disassembly process of the pressure-resistant cylinder 200, does not create any obstruction, and does not require significant adjustments to the overall equipment. It only requires the corresponding hole positions to be made in the end cap 101 and the outer edge 113, making the operation simple. In practice, multiple sets of fasteners 120 can be evenly spaced circumferentially around the outer periphery of the end cap 101 to ensure the stability and uniformity of the applied force.

[0052] The limiting effect of fastener 120 can take various forms. For example, fastener 120 can first pass through end cap 101 and then extend to be fastened to outer edge 113, that is, the lower part of fastener 120 and outer edge 113 are fixedly connected; or, the upper part of fastener 120 can first be fastened to end cap 101 and then extend to the interior of outer edge 113 after passing through end cap 101. Alternatively, the upper and lower parts of fastener 120 can be fastened to end cap 101 and outer edge 113 respectively. Taking threaded fastening as an example, if fastener 120 has a threaded section, end cap 101 has a radially penetrating fixing hole 102, and outer edge 113 has a corresponding matching connecting hole 112, the fixing hole 102 can be a threaded hole, and the connecting hole 112 can be a smooth through hole. Fastener 120 can be threaded through fixing hole 102 and then extend into connecting hole 112 for axial limiting. Alternatively, both the fixing hole 102 and the connecting hole 112 can be threaded holes, allowing the fastener 120 to be threaded and tightened securely, ensuring a strong connection. Alternatively, the fixing hole 102 can be a smooth through hole, and the connecting hole 112 a threaded hole. The fastener 120 passes through the fixing hole 102 and is then threaded into the connecting hole 112. This ensures a strong fastening effect on the bearing housing 110 and simplifies construction, allowing for quick insertion and tightening of the fastener 120. These designs effectively limit the axial displacement of the bearing housing 110, preventing it from detaching synchronously with the pressure-resistant cylinder 200. They also enhance the connection between the bearing housing 110 and the end cover 101, ensuring positional stability and increased structural strength. Using these methods results in a simple structure and convenient operation, requiring no significant alterations to the original component structures. This approach is cost-effective and does not affect the original normal installation of the components.

[0053] In practice, fastener 120 can also be optionally configured as a fixing pin, with a radially penetrating fixing hole 102 on the end cap 101 and a corresponding connecting hole 112 on the outer edge 113. Fastener 120 fits through the connecting hole 112 and the fixing hole 102. By setting a fixing pin, the integrity between the bearing seat 110 and the end cap 101 in the axial direction can also be ensured, preventing the bearing seat 110 from axially separating synchronously with the pressure cylinder 200, and still ensuring the independent assembly and disassembly of the pressure cylinder 200.

[0054] In practice, it is preferable that the outer edge 113 of the bearing housing 110 is thinner, which facilitates processing and axial clamping of the pressure cylinder 200. To ensure sufficient installation space for the fastener 120, the outer edge 113 is further provided with a connecting platform 111 that moves axially toward the tail end of the pressure cylinder 200. The connecting platform 111 is located outside the outer wall of the pressure cylinder 200. The fastener 120 passes through the end cap 101 and extends into the connecting platform 111, and the tail end of the fastener 120 does not contact the outer wall of the pressure cylinder 200, thus not hindering the normal axial installation and pulling of the pressure cylinder 200. By setting the connecting platform 111, the thickness range of the outer edge 113 is effectively increased in a local area, providing sufficient space to cooperate with the end cap 101 to install the fastener 120, ensuring installation stability and strength, and simplifying the structural adjustment of the bearing housing 110. Corresponding to the above installation, if the fastener 120 is still fastened by a thread, a radially penetrating fixing hole 102 is provided on the end cap 101, and a corresponding connecting hole 112 is provided on the connecting platform 111. The connecting hole 112 and / or the fixing hole 102 are threaded holes, which are threadedly engaged with the fastener 120 for fastening. Alternatively, the fastener 120 can be used as a fixing pin, which passes through the end cap 101 and the connecting platform 111.

[0055] On this basis, further, combined Figure 6 As shown, the pressure-resistant cylinder 200 has an outwardly protruding edge ring 201 surrounding its tail end. An installation groove 202 is provided on the edge ring 201 corresponding to the position of the connecting platform 111. The connecting platform 111 on the bearing seat 110 is embedded into the installation groove 202 of the pressure-resistant cylinder 200. In practice, the edge ring 201 surrounds the tail end of the pressure-resistant cylinder 200. This edge ring 201 is also a thin-walled portion that mates with the outer edge 113 of the bearing seat 110 to increase the clamping area and ensure stable installation. The installation groove 202 can be formed by directly creating a notch in the edge ring 201. By creating the installation groove 202 on the edge ring 201 to mate with the connecting platform 111, the axial installation of the pressure-resistant cylinder 200 is simultaneously guided and limited, preventing circumferential deflection, ensuring accurate installation position, and maintaining the positional stability of the pressure-resistant cylinder 200 during long-term use.

[0056] The pump unit structure of this embodiment requires only minor structural adjustments. Without changing the original structural installation and fit, only mating holes need to be opened on the end cover 101 of the base 100 and the outer edge 113 of the bearing housing 110. The axial integral positioning is achieved by using fasteners 120 passing through radially, which allows the bearing housing 110 to always remain integral with the base 100. This avoids the bearing housing 110 from being synchronously separated from the pressure-resistant cylinder 200 due to installation clamping force and sealing adsorption force. This achieves independent and flexible disassembly of each component. Furthermore, for the normal axial installation process of the pressure-resistant cylinder 200 and the bearing housing 110, they do not interfere with each other's normal installation and will not cause path obstacles. The construction operation is convenient and the cost is low.

[0057] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A pump unit convenient to disassemble, comprising: a base (100), the front end of the base (100) having an end cover part (101), the end cover part (101) being formed with a mounting area for embedding a pressure cylinder (200); the pressure cylinder (200) being fitted and embedded into the mounting area at the tail end; a bearing seat (110) being installed between the base (100) and the pressure cylinder (200) and being pressed tightly in the mounting area of the end cover part (101) by the tail end of the pressure cylinder (200); characterized in that the bearing seat (110) comprises a main body part (115) with a shaft hole in the center for installing a motor shaft; the main body part (115) is further provided with an annular inner extension part (114) extending along the axial direction and fitted to extend into the inside of the pressure cylinder (200) outside the shaft hole; the outer peripheral edge of the main body part (115) has an outer edge part (113), and the tail end of the pressure cylinder (200) is sleeved on the outer periphery of the inner extension part (114) and abuts against the outer edge part (113) from one side; the outer edge part (113) of the bearing seat (110) and the end cover part (101) of the base (100) have a fastener (120) passing through the end cover part (101) in the radial direction and extending into the inside of the outer edge part (113).

2. The pump package of claim 1, wherein: the fastener (120) passes through the end cover part (101) and extends to be fastened and connected with the outer edge part (113); or / and, the fastener (120) is fastened and connected with the end cover part (101) and extends into the inside of the outer edge part (113) after passing through the end cover part (101).

3. The pump package of claim 2, wherein: the fastener (120) is provided with a threaded section, the end cover part (101) is provided with a fixed hole (102) passing through in the radial direction, and the outer edge part (113) is provided with a corresponding connecting hole (112), the connecting hole (112) and / or the fixed hole (102) being a threaded hole and being fastened and connected with the fastener (120) in a threaded manner.

4. The pump package of claim 1, wherein: the fastener (120) is a fixed pin shaft, the end cover part (101) is provided with a fixed hole (102) passing through in the radial direction, and the outer edge part (113) is provided with a connecting hole (112), and the fastener (120) passes through the connecting hole (112) and the fixed hole (102) in a fitted manner.

5. The pump package of claim 1, wherein: the edge of the outer edge part (113) is provided with a connecting platform (111) approaching the tail end of the pressure cylinder (200) in the axial direction, and the connecting platform (111) is located outside the outer wall of the pressure cylinder (200), the fastener (120) passes through the end cover part (101) and extends into the inside of the connecting platform (111) in a corresponding manner, and the tail end of the fastener (120) does not contact the outer wall of the pressure cylinder (200).

6. The pump package of claim 5, wherein: the tail end of the pressure cylinder (200) is provided with an outwardly protruding edge ring (201) around the outer periphery, the edge ring (201) is provided with a mounting groove (202) at a position corresponding to the connecting platform (111), and the connecting platform (111) on the bearing seat (110) is fitted and embedded into the mounting groove (202) of the pressure cylinder (200).

7. The pump package of claim 5, wherein: The fastener (120) is provided with a threaded section, the end cover part (101) is provided with a radially penetrating fixing hole (102), the connecting platform (111) is correspondingly provided with a matched connecting hole (112), the connecting hole (112) and / or the fixing hole (102) is a threaded hole, and is fastened in threaded cooperation with the fastener (120).

8. A pump package for easy removal according to any one of claims 1-7, characterized in that: The end cover part (101) of the machine base (100) is uniformly and spacedly provided with a plurality of groups of fixing holes (102) along the circumference, and is correspondingly provided with a plurality of groups of fasteners (120).

9. A pump package for easy removal according to any one of claims 1-7, characterized in that: The inner extension part (114) of the bearing seat (110) is provided with a sealing ring between the outer wall surface and the inner wall of the pressure-resistant cylinder (200).

10. The pump package of claim 9, wherein: The inner extension part (114) of the bearing seat (110) is provided with a sealing groove around the outer wall surface, and the sealing groove is provided with a sealing ring.

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