Permanent magnet synchronous motor driven pump assembly connection structure

Abstract

The utility model discloses a pump assembly connecting structure of permanent magnet synchronous motor drive, including oil cylinder body and intermediate body, oil cylinder body is connected with permanent magnet synchronous motor, and oil cylinder body is equipped with the shaft sleeve, and permanent magnet synchronous motor is installed on the shaft sleeve, and oil cylinder body is detachably connected with the intermediate body, and the intermediate body is connected with the pump body, and the connecting structure oil cylinder body dispenses with traditional heavy independent support, makes the output shaft of permanent magnet synchronous motor directly support in the shaft sleeve of oil cylinder body through the bearing, has improved the rigidity and stability of permanent magnet synchronous motor installation significantly, and increases the convenience and stability of the connection between oil cylinder body and pump body through the setting of intermediate body simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of plunger pump technology, and in particular relates to a connection structure for a pump assembly driven by a permanent magnet synchronous motor. Background Technology

[0002] Electric motor-driven pump systems, as the core power unit of hydraulic transmission and fluid machinery, are widely used in many industries and fields such as metallurgy, petrochemicals, chemicals, coal, building materials, public utilities, and aerospace. They are the most widely used general-purpose machinery in the national economy.

[0003] The existing piston pump cylinder is usually equipped with a bulky bracket to match the installation of the permanent magnet synchronous motor. The bracket is large in size, which not only increases the overall size and weight of the piston pump, but also makes the installation stability of the permanent magnet synchronous motor poor. Therefore, the connection between the piston pump and the permanent magnet synchronous motor needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a connection structure for a pump assembly driven by a permanent magnet synchronous motor. This connection structure eliminates the traditional bulky independent support in the cylinder body, allowing the output shaft of the permanent magnet synchronous motor to be directly supported in the bushing of the cylinder body through bearings, which significantly improves the rigidity and stability of the permanent magnet synchronous motor installation. At the same time, the intermediate body increases the convenience and stability of the connection between the cylinder body and the pump body.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A pump assembly connection structure driven by a permanent magnet synchronous motor includes a cylinder body connected to the permanent magnet synchronous motor. The cylinder body is characterized by having a bushing on which the permanent magnet synchronous motor is mounted. An intermediate body is detachably connected to the cylinder body and connected to the pump body. This connection structure eliminates the need for a traditional, bulky independent support, allowing the output shaft of the permanent magnet synchronous motor to be directly supported within the bushing of the cylinder body via bearings. This significantly improves the rigidity and stability of the permanent magnet synchronous motor installation. Furthermore, the intermediate body enhances the convenience and stability of the connection between the cylinder body and the pump body.

[0007] Furthermore, the bushing has a through hole, the output shaft of the permanent magnet synchronous motor is installed in the through hole, and bearings are installed at both ends of the through hole, through which the output shaft passes.

[0008] Furthermore, the two ends of the through hole are provided with first limiting steps, and the bearing is installed in the first limiting steps. The first limiting steps are used to limit the bearing and provide a precise axial positioning reference for the bearing, ensuring that the bearing is installed in place and will not move axially during operation. This ensures the precise alignment of the output shaft and the internal transmission components of the cylinder body, improving transmission efficiency and system reliability.

[0009] Furthermore, the cylinder body is provided with a mounting cavity for connecting the swashplate and the permanent magnet synchronous motor. The mounting cavity integrated into the cylinder body provides a compact and stable mounting space for the swashplate, enabling the swashplate to be directly and efficiently connected to the output shaft, simplifying the power transmission path, reducing energy loss in intermediate links, and optimizing the spatial layout of the overall structure.

[0010] Furthermore, a connecting part is provided on one side of the cylinder body, which is connected to the intermediate body. Both the connecting part and the intermediate body are provided with a first threaded hole. The connecting part and the intermediate body are detachably connected by bolts through the first threaded holes. The detachable design of the bolt connection makes the connection between the cylinder body and the intermediate body very strong and reliable. At the same time, it greatly facilitates subsequent maintenance, repair or component replacement without the need for overall disassembly, which significantly reduces maintenance costs and downtime.

[0011] Furthermore, the intermediate body is provided with a plunger mounting hole through which the plunger of the pump body passes. The plunger mounting hole provides a precise guide channel for the plunger of the pump body, ensuring that the plunger maintains a stable linear trajectory during reciprocating motion, reducing uneven wear and leakage, and improving the volumetric efficiency and long-term operational stability of the pump.

[0012] Furthermore, a second limiting step is provided on one side of the plunger mounting hole. The second limiting step is used to limit the plunger. The second limiting step plays a precise axial limiting role at the end of the plunger's stroke, preventing the plunger from overextending or impacting other components, ensuring that the plunger works efficiently within a safe stroke, and at the same time helping to maintain the effective working position of the seals in the cylinder bore and extend the seal life.

[0013] Furthermore, the intermediate body is provided with a second threaded hole, and the intermediate body is detachably connected to the pump body through the second threaded hole and bolts. The detachable connection between the intermediate body and the pump body by bolts not only ensures the strength and rigidity of the connection and can withstand the hydraulic pressure and mechanical force when the pump is working, but also realizes the modular design, which facilitates the assembly, disassembly and independent replacement of the pump body or intermediate body module.

[0014] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0015] 1. This connection structure eliminates the need for the traditional bulky independent support, allowing the output shaft of the permanent magnet synchronous motor to be directly supported within the bushing of the cylinder body via bearings. This significantly improves the rigidity and stability of the permanent magnet synchronous motor installation. At the same time, the intermediate body increases the convenience and stability of the connection between the cylinder body and the pump body.

[0016] 2. A connecting part is provided on one side of the cylinder body, which is connected to the intermediate body. Both the connecting part and the intermediate body are provided with a first threaded hole. The connecting part and the intermediate body are detachably connected by bolts through the first threaded holes. The detachable design of the bolt connection makes the connection between the cylinder body and the intermediate body very strong and reliable. At the same time, it greatly facilitates subsequent maintenance, repair or component replacement without the need for overall disassembly, which significantly reduces maintenance costs and downtime. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the connection structure of a pump assembly driven by a permanent magnet synchronous motor according to this utility model.

[0019] Figure 2 This utility model Figure 1 A sectional view;

[0020] Figure 3 This is a schematic diagram of the structure of the oil cylinder body in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the intermediate body in this utility model;

[0022] Figure 5 This is a schematic diagram of the pump assembly driven by a permanent magnet synchronous motor in this utility model;

[0023] Figure 6 This utility model Figure 5 A sectional view.

[0024] In the diagram: 1-Cylinder body; 2-Permanent magnet synchronous motor; 3-Shaft sleeve; 4-Intermediate body; 5-Pump body; 6-Through hole; 7-Output shaft; 8-Bearing; 9-First limiting step; 10-Mounting cavity; 11-Swashplate; 12-Connecting part; 13-First threaded hole; 14-Plunger mounting hole; 15-Plunger; 16-Second limiting step; 17-Second threaded hole; 18-Bolt. Detailed Implementation

[0025] like Figures 1 to 6As shown, this utility model discloses a pump assembly connection structure driven by a permanent magnet synchronous motor 2, including a permanent magnet synchronous motor 2, a cylinder body 1, an intermediate body 4, and a pump body 5. The permanent magnet synchronous motor 2 is mounted on the cylinder body 1, and the cylinder body 1 and the intermediate body 4 are detachably connected. The intermediate body 4 and the pump body 5 are also detachably connected. The cylinder body 1 is provided with a bushing 3, on which the permanent magnet synchronous motor 2 is mounted. The bushing 3 is provided with a through hole 6, in which the output shaft 7 of the permanent magnet synchronous motor 2 is installed. Bearings 8 are installed at both ends of the through hole 6, through which the output shaft 7 passes. The inner ring of the bearing 8 is fitted onto the output shaft 7, and the outer ring of the bearing 8 is connected to the inner wall of the through hole 6. This connection structure eliminates the need for a traditional bulky independent support, allowing the output shaft 7 of the permanent magnet synchronous motor 2 to be directly supported within the bushing 3 of the cylinder body 1 via the bearings 8. This significantly improves the rigidity and stability of the permanent magnet synchronous motor 2 installation. At the same time, the intermediate body 4 increases the convenience and stability of the connection between the cylinder body 1 and the pump body 5.

[0026] The two ends of the through hole 6 are provided with first limiting steps 9. The bearing 8 is installed in the first limiting steps 9. The first limiting steps 9 are used to limit the bearing 8. The first limiting steps 9 provide a precise axial positioning reference for the bearing 8, ensuring that the bearing 8 is installed in place and will not move axially during operation. This ensures the precise alignment of the output shaft 7 with the internal transmission components of the cylinder body 1, improving transmission efficiency and system reliability.

[0027] The cylinder body 1 has a mounting cavity 10 on the side near the intermediate body 4. The mounting cavity 10 is used to connect the swashplate 11 and the permanent magnet synchronous motor 2. The swashplate 11 is fixedly mounted on the output shaft 7. The permanent magnet synchronous motor 2 drives the swashplate 11 to rotate through the output shaft 7. The mounting cavity 10 integrated into the cylinder body 1 provides a compact and stable mounting space for the swashplate 11, enabling the swashplate 11 to be directly and efficiently connected to the output shaft 7, simplifying the power transmission path, reducing energy loss in the intermediate links, and optimizing the spatial layout of the overall structure.

[0028] A connecting part 12 is provided on one side of the cylinder body 1. The connecting part 12 is connected to the intermediate body 4. Both the connecting part 12 and the intermediate body 4 are provided with a first threaded hole 13. The connecting part 12 and the intermediate body 4 are detachably connected by bolts 18 through the first threaded hole 13. The detachable design of the connection through bolts 18 makes the connection between the cylinder body 1 and the intermediate body 4 very firm and reliable. At the same time, it greatly facilitates subsequent maintenance, repair or component replacement without the need for overall disassembly, which significantly reduces maintenance costs and downtime.

[0029] The intermediate body 4 is provided with a plunger mounting hole 14. The plunger 15 of the pump body 5 passes through the plunger mounting hole 14. A second limiting step 16 is provided on one side of the plunger mounting hole 14. The second limiting step 16 is used to limit the plunger 15. The plunger mounting hole 14 provides a precise guide channel for the plunger 15 of the pump body 5, ensuring that the plunger 15 maintains a stable linear trajectory during reciprocating motion, reducing uneven wear and leakage, improving the volumetric efficiency of the pump and the stability of long-term operation. The second limiting step 16 plays a precise axial limiting role at the end of the stroke of the plunger 15, preventing the plunger 15 from overextending or hitting other parts, ensuring that the plunger 15 works efficiently within a safe stroke, and at the same time helping to maintain the effective working position of the seals in the cylinder bore, extending the seal life.

[0030] The intermediate body 4 is provided with a second threaded hole 17. The intermediate body 4 is detachably connected to the pump body 5 through the second threaded hole 17 and the bolt 18. The detachable connection between the intermediate body 4 and the pump body 5 through the bolt 18 not only ensures the strength and rigidity of the connection and can withstand the hydraulic pressure and mechanical force when the pump is working, but also realizes the modular design, which facilitates the assembly, disassembly and independent replacement of the pump body 5 or the intermediate body 4 module.

[0031] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A pump assembly connection structure driven by a permanent magnet synchronous motor, comprising a cylinder body connected to a permanent magnet synchronous motor, characterized in that: The cylinder body is provided with a bushing, the permanent magnet synchronous motor is mounted on the bushing, and the cylinder body is detachably connected to an intermediate body, which is connected to the pump body.

2. The connection structure of a pump assembly driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The bushing has a through hole, the output shaft of the permanent magnet synchronous motor is installed in the through hole, and bearings are installed at both ends of the through hole, through which the output shaft passes.

3. The connection structure of a pump assembly driven by a permanent magnet synchronous motor according to claim 2, characterized in that: The through hole has a first limiting step at both ends, and the bearing is installed in the first limiting step. The first limiting step is used to limit the bearing.

4. The connection structure of a pump assembly driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The cylinder body is provided with a mounting cavity, which is used to connect the swashplate to the permanent magnet synchronous motor.

5. The connection structure of a pump assembly driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The cylinder body has a connecting part on one side, which is connected to the intermediate body. Both the connecting part and the intermediate body have a first threaded hole, and the connecting part and the intermediate body are detachably connected by bolts through the first threaded hole.

6. The connection structure of a pump assembly driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The intermediate body is provided with a plunger mounting hole, through which the plunger of the pump body passes.

7. The connection structure of a pump assembly driven by a permanent magnet synchronous motor according to claim 6, characterized in that: A second limiting step is provided on one side of the plunger mounting hole, and the second limiting step is used to limit the plunger.

8. The connection structure of a pump assembly driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The intermediate body is provided with a second threaded hole, and the intermediate body is detachably connected to the pump body through the second threaded hole and a bolt.

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