A coupling for a direct-drive horizontal filtrate pump

Abstract

This utility model relates to the field of mechanical transmission equipment technology, and discloses a coupling for a direct-drive horizontal filtrate pump, including a motor and a filtrate pump main shaft. The output end of the motor is fixedly mounted with a coupling body. A slot is formed on the top of the coupling body, and multiple mounting holes are formed on both sides of the coupling body away from the slot. A through hole is formed on the front top of the coupling body, and a threaded hole is formed on the rear top of the coupling body. In this utility model, the rectangular slot on the top of the coupling body, in conjunction with the through hole and threaded hole of the motor, allows the slot to undergo controllable elastic deformation when the bolts are tightened. This converts the axial tightening force into a radially uniformly distributed frictional force, replacing the traditional key connection for torque transmission. This transmission method can synchronously increase the contact surface friction as the load increases, avoiding torque transmission interruption or slippage, and ensuring the continuous and stable operation of the direct-drive horizontal filtrate pump.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission equipment technology, and in particular to a coupling for a direct-drive horizontal filtrate pump. Background Technology

[0002] In industrial production, direct-drive horizontal filtrate pumps are core equipment for solid-liquid separation and fluid transport. With their advantages of small footprint, high transmission efficiency, and low operating noise, they are widely used in chemical production for acid and alkali solution transport, metallurgical slurry filtration, municipal wastewater treatment for sludge dewatering, and food processing for liquid purification. Their working principle involves a motor directly driving the pump impeller to rotate, utilizing centrifugal force to achieve solid-liquid separation, thereby completing the extraction and transport of the fluid. This is a crucial link in ensuring continuous production processes and improving material handling efficiency. The coupling, as the core transmission component connecting the motor output and the pump shaft, directly determines the operational stability, power transmission efficiency, and overall service life of the direct-drive horizontal filtrate pump, having a vital impact on industrial production capacity output and safe operation.

[0003] In the existing technology, couplings suitable for this type of filtrate pump on the market mostly adopt traditional key connections, axial bolt locking, or elastic sleeve pin structures. During installation, they rely on the fit between the keyway and the key to ensure coaxiality, requiring repeated adjustments, which is cumbersome and difficult to control in terms of precision, and is prone to vibration and wear. In power transmission, the keyway is prone to stress concentration leading to failure, bolts are prone to loosening, and elastic elements are prone to aging, affecting the stability of transmission. Therefore, a coupling for direct-drive horizontal filtrate pumps is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a coupling for a direct-drive horizontal filtrate pump, aiming to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A coupling for a direct-drive horizontal filtrate pump includes a motor and a filtrate pump main shaft. The output end of the motor is fixedly mounted with a coupling body. A slot is provided on the top of the coupling body. Multiple mounting holes are provided on both sides of the coupling body away from the slot. A through hole is provided on the front top of the coupling body. A threaded hole is provided on the rear top of the coupling body. As a further description of the above technical solution: The left side of the coupling body has multiple connection holes, and the main shaft of the filtrate pump is fixedly installed on the coupling body by bolts in the connection holes; As a further description of the above technical solution: A mounting recess is provided on the left side of the coupling body, and the outer right side wall of the filtrate pump main shaft is in contact with the inner wall of the mounting recess. As a further description of the above technical solution: The inner wall of the through hole is rotatably connected to a bolt, and the outer side of the bolt is threadedly connected to the inner wall of the threaded hole. As a further description of the above technical solution: The cross-section of the slot is a rectangular through slot structure, and the slot extends radially along the main body of the coupling. The slot width is clearance-fitted with the diameter of the adapter bolt, and the slot depth is 1 / 3 to 1 / 2 of the radial thickness of the main body of the coupling. As a further description of the above technical solution: The coupling body is made of alloy structural steel, and after quenching and tempering, it is guaranteed to have a tensile strength ≥800MPa and a yield strength ≥500MPa. The surface is treated with hard chrome plating, and the plating thickness is 0.02~0.05mm.

[0006] This utility model has the following beneficial effects: 1. In this utility model, by utilizing the rectangular slot at the top of the coupling body and the through hole and threaded hole mating structure thereon, the bolt tightening can cause the slot to produce controllable elastic deformation, converting the axial tightening force into a radially uniformly distributed frictional force, replacing the traditional key connection for torque transmission. This transmission method can synchronously increase the contact surface friction as the load increases, avoiding torque transmission interruption or slippage. At the same time, the keyless connection design eliminates stress concentration at the keyway, reduces energy loss during power transmission, and ensures the continuous and stable operation of the direct-drive horizontal filtrate pump.

[0007] 2. In this utility model, the mounting recess on the left side of the coupling body and the connecting hole are designed to cooperate. The mounting recess can achieve preliminary and accurate radial and axial positioning of the filtrate pump spindle before the bolts are tightened, eliminating the need for repeated adjustment and alignment, and significantly simplifying the installation process. The multi-hole evenly distributed design of the connecting hole can ensure that the bolt preload is evenly distributed, avoiding spindle misalignment or loosening, and reducing the difficulty and time cost of installation. Attached Figure Description

[0008] Figure 1 This is a perspective view of a coupling for a direct-drive horizontal filtrate pump proposed in this utility model; Figure 2 This is a front view of the coupling body for a direct-drive horizontal filtrate pump coupling proposed in this utility model; Figure 3 This is a top view of the coupling body for a direct-drive horizontal filtrate pump coupling proposed in this utility model; Figure 4 This is a side view of the coupling body for a direct-drive horizontal filtrate pump coupling proposed in this utility model.

[0009] Legend: 1. Motor; 2. Coupling body; 3. Filtration pump spindle; 4. Mounting recess; 5. Connecting hole; 6. Mounting port; 7. Through hole; 8. Threaded hole; 9. Slot. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] Reference Figure 1 - Figure 4 This utility model provides an embodiment of a coupling for a direct-drive horizontal filtrate pump, comprising a motor 1 and a filtrate pump main shaft 3. The motor 1 serves as the power output source, providing driving force for the entire transmission system. A coupling body 2 is fixedly mounted on the output end of the motor 1. The coupling body 2 is the core component connecting the motor 1 and the filtrate pump main shaft 3, transmitting the power from the motor 1 to the filtrate pump main shaft. The filtrate pump main shaft 3 is the connection hub between the power receiving end and the execution end, seamlessly converting the torque transmitted from the coupling into the working power of the filtrate pump, driving components such as the impeller. The coupling body 2 has multiple connecting holes 5 on its left side. The filtrate pump main shaft 3 is fixedly mounted on the coupling body 2 via bolts in the connecting holes 5. A mounting recess 4 is located on the left side of the coupling body 2. The outer right wall of the filtrate pump main shaft 3 contacts the inner wall of the mounting recess 4. The mounting recess 4 is a precision positioning structure; its inner wall precisely fits the outer wall of the filtrate pump main shaft 3. Before the bolts are finally tightened, the main shaft achieves preliminary precise positioning and alignment in the radial and axial directions, greatly simplifying the installation and debugging process and ensuring the coaxiality of the motor 1 and the pump shaft. The connecting holes 5 and the bolts together form an axial fastening and preliminary connection system. Their function is to initially tighten and fix the filtrate pump main shaft 3 within the mounting recess 4 of the coupling body 2, achieving a rigid connection between the two. It primarily bears axial force. The evenly distributed design of multiple holes ensures uniform distribution of the connection preload, preventing the main shaft from skewing or loosening during initial installation.

[0012] The top of the coupling body 2 is provided with a slot 9, and multiple mounting ports 6 are provided on both sides of the coupling body 2 away from the slot 9. The mounting ports 6 are designed for manufacturing purposes, and their main function is to provide operating space for tools (such as wrenches) for the installation of the coupling body 2 and the output end of the motor 1, so that the operator can tighten the screws or bolts that fix the coupling body to the motor shaft through the port to ensure that the two are firmly connected. A through hole 7 is provided on the front top side of the coupling body 2, and a threaded hole 8 is provided on the rear top side of the coupling body 2. A bolt is rotatably connected to the inner wall of the through hole 7, and the outer side of the bolt is threadedly connected to the inner wall of the threaded hole 8. During installation, the coupling body 2 is fitted onto the output shaft of the motor 1, and the bolt is threaded through the through hole 7 on the coupling body 2 and threadedly connected to the threaded hole 8 to achieve locking. The through hole 7 and the threaded hole 8 are the key execution structures to achieve the radial elastic locking function. The through hole 7 allows the bolt to pass through without obstruction, while the threaded hole 8 is used to bear and convert the bolt's tightening torque into a strong axial tensile force. The fit of this pair of holes converts the bolt tightening action into a radial locking force that causes the slot 9 to produce controllable elastic deformation.

[0013] The cross-section of the slot 9 is a rectangular through slot structure, and the slot 9 runs radially through the coupling body 2. The slot width is clearance-fitted with the diameter of the matching bolt, and the slot depth is 1 / 3 to 1 / 2 of the radial thickness of the coupling body 2. Under the action of bolt tension, the slot wall undergoes elastic deformation, causing the inner hole of the coupling to shrink uniformly, thereby generating huge radial clamping force and friction force, replacing the traditional keyway to directly transmit torque. The coupling body 2 is made of alloy structural steel and is heat-treated to ensure a tensile strength ≥800MPa and a yield strength ≥500MPa to withstand high torque and high toughness to resist impact loads. The surface is hard chrome plated with a thickness of 0.02~0.05mm, which gives the coupling body 2 excellent wear resistance and reduces wear during long-term use. At the same time, the chrome layer has excellent chemical stability and can effectively resist the corrosion of corrosive media that may exist in the working environment of the filtrate pump, thus extending its service life.

[0014] Working principle: First, the coupling body 2 is fitted onto the output shaft of the motor 1. Bolts are passed through the through hole 7 on the front side of the top of the coupling body 2 and threadedly connected to the threaded hole 8 on the rear side of the top to achieve locking, thus fixing the motor 1 to the coupling body 2. Then, the filtrate pump main shaft 3 is precisely positioned and installed by bolts in the connecting hole 5 on the left side of the coupling body 2, engaging with the mounting recess 4, thus completing the initial connection between the coupling body 2 and the filtrate pump main shaft 3. Because the top of the coupling body 2 has a radially penetrating rectangular slot 9 with a width matching the bolt and a depth of 1 / 3-1 / 2 of the radial thickness, under the action of bolt tightening force, the heat-treated alloy structural steel... The coupling body 2, made of a material with elastic deformation capability, converts the axial locking force into a radially uniformly distributed frictional force. The torque generated when the motor 1 is running is transmitted to the main shaft 3 of the filtrate pump through the radial frictional force of the coupling body 2 to drive its rotation. When the load increases, the frictional force on the contact surface will increase synchronously with the torque demand to ensure stable transmission. At the same time, the 0.02-0.05mm hard chrome plating on the surface of the coupling body 2 gives it wear-resistant and corrosion-resistant properties. Combined with the slotted design 9 and the radial force transmission method, it effectively adapts to high vibration and frequent start-stop conditions, reduces stress concentration, fatigue fracture and axial loosening risks, and ensures stable operation of the direct-drive horizontal filtrate pump.

[0015] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coupling for a direct-drive horizontal filtrate pump, comprising a motor (1) and a filtrate pump main shaft (3), characterized in that: The output end of the motor (1) is fixedly installed with a coupling body (2). The top of the coupling body (2) is provided with a slot (9). Multiple mounting ports (6) are provided on both sides of the coupling body (2) away from the slot (9). A through hole (7) is provided on the front side of the top of the coupling body (2). A threaded hole (8) is provided on the rear side of the top of the coupling body (2).

2. The coupling for a direct-drive horizontal filtrate pump according to claim 1, characterized in that: The coupling body (2) has multiple connection holes (5) on its left side, and the filter pump main shaft (3) is fixedly installed on the coupling body (2) by bolts in the connection holes (5).

3. A coupling for a direct-drive horizontal filtrate pump according to claim 1, characterized in that: The coupling body (2) has a mounting recess (4) on its left side, and the outer right side wall of the filtrate pump main shaft (3) is in contact with the inner wall of the mounting recess (4).

4. A coupling for a direct-drive horizontal filtrate pump according to claim 1, characterized in that: The inner wall of the through hole (7) is rotatably connected with a bolt, and the outer side of the bolt is threadedly connected to the inner wall of the threaded hole (8).

5. A coupling for a direct-drive horizontal filtrate pump according to claim 1, characterized in that: The cross-section of the slot (9) is a rectangular through slot structure, and the slot (9) is radially through the coupling body (2). The slot width is clearance-fitted with the diameter of the adapter bolt, and the slot depth is 1 / 3-1 / 2 of the radial thickness of the coupling body (2).

6. A coupling for a direct-drive horizontal filtrate pump according to claim 1, characterized in that: The coupling body (2) is made of alloy structural steel and is heat-treated to ensure tensile strength ≥800MPa and yield strength ≥500MPa. The surface is hard chrome plated with a coating thickness of 0.02~0.05mm.

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