Single-stage pipeline pump with dynamic seal and integrated packing seal

Abstract

The invention relates to a single-stage pipeline pump with dynamic seal and integrated packing seal. The single-stage pipeline pump comprises a foundation slab, a pump body, an impeller, a pump cover, an auxiliary impeller dynamic seal, a motor, a water retaining ring, an integrated self-adjusting packing seal system and an impeller fixing component. The whole single-stage pipeline pump is fixed to a foundation slab, the water retaining ring is located on the pump shaft and located above the integrated self-adjusting packing sealing system, the auxiliary impeller power seal and the integrated self-adjusting packing sealing system are both installed on the pump shaft, and the auxiliary impeller power seal is located between the integrated self-adjusting packing sealing system and the impeller. According to the sealing device, auxiliary impeller power sealing and an integrated self-adjusting packing sealing system are combined for use, the problems existing in an existing mechanical sealing system are solved, and particularly the problems that the mechanical sealing price is high, an external system is complex, the investment cost is high and the maintenance cost is high when a unit is under the working conditions of solid particle impurities, corrosivity and the like are solved.

Description

Technical Field

[0001] The present invention relates to a single-stage pipeline pump, and more particularly to a single-stage pipeline pump with a dynamic seal and an integrated self-adjusting packing seal system. The seal solves the problems existing in existing mechanical seals, and in particular solves the problems of expensive mechanical seals, complex external systems, high investment costs, and high maintenance costs of units under working conditions such as solid particle impurities and corrosive conditions. Background Art

[0002] A single-stage in-line pump is a centrifugal pump that can be installed directly into a piping system, with its inlet and outlet located on the same horizontal line and having the same diameter. The impeller is mounted directly on the extended motor shaft, resulting in a compact structure, a small footprint, and low construction investment. It is widely used in building water supply, industrial processes, HVAC, agricultural irrigation, and other fields.

[0003] The existing single-stage pipeline pump is the core equipment for system fluid transportation. The main shaft sealing performance directly affects the operating efficiency, reliability and maintenance cost of the equipment. The reliability of the seal is particularly important in some harsh working conditions such as those containing solid particle impurities and corrosive conditions.

[0004] Existing single-stage pipeline pump shaft seals use mechanical seals or traditional packing seals. Mechanical seals have complex structures, require high precision and are expensive. In addition, under working conditions containing solid particle impurities and corrosive conditions, mechanical seals fail more frequently or require expensive and complex external auxiliary systems to achieve sealing.

[0005] Traditional packing seals achieve sealing by using axial compression to cause radial expansion of the packing. Therefore, they require periodic maintenance and complex external filtration and flushing cooling systems. In addition, they are more prone to seal failures such as wear under working conditions containing solid particle impurities and corrosive conditions.

[0006] Due to the difference in structural dimensions between mechanical seals and packing seals, the mechanical seals and packing seals on existing pipeline pumps cannot achieve universal and interchangeable interface dimensions. Summary of the Invention

[0007] In response to the above problems, the main purpose of the present invention is to provide a single-stage pipeline pump with a dynamic seal and an integrated self-adjusting packing seal that uses a combination of a secondary impeller dynamic seal and an integrated self-adjusting packing seal system to solve the problems existing in existing mechanical seals, especially the problems of expensive mechanical seals, complex external systems, high investment costs, and high maintenance costs under working conditions such as solid particle impurities and corrosiveness.

[0008] The present invention solves the above-mentioned technical problems through the following technical solutions: a single-stage pipeline pump with a dynamic seal and an integrated packing seal, the single-stage pipeline pump with a dynamic seal and an integrated packing seal includes: a basic base plate, a pump body, an impeller, a pump cover, an auxiliary impeller dynamic seal, an electric motor, a water retaining ring, an integrated self-adjusting packing sealing system, and an impeller fixing component; the entire single-stage pipeline pump is fixed on the basic base plate, the pump cover is fixed on the pump body, the impeller fixing component fixes the impeller on the pump shaft, the water retaining ring is located on the pump shaft and above the integrated self-adjusting packing sealing system, the auxiliary impeller dynamic seal and the integrated self-adjusting packing sealing system are both installed on the pump shaft, and the auxiliary impeller dynamic seal is located between the integrated self-adjusting packing sealing system and the impeller.

[0009] In a specific implementation example of the present invention, the auxiliary impeller dynamic seal includes auxiliary impeller blades and an auxiliary impeller cover plate; the auxiliary impeller blades include several pieces, which are evenly distributed on the auxiliary impeller cover plate. The shape of the auxiliary impeller blades is spiral centrifugal, and the auxiliary impeller cover plate is gradually inclined from the hub to the edge of the cover plate.

[0010] In a specific embodiment of the present invention, the number of auxiliary impeller blades is 4-8.

[0011] In a specific embodiment of the present invention, the auxiliary impeller blades and the auxiliary impeller cover plate are cast as one body.

[0012] In a specific embodiment of the present invention, the integrated self-adjusting packing sealing system includes a sealing body, a retaining ring, a wave spring, a packing, a packing ring, a shaft sleeve, and a bolt; the shaft sleeve is sleeved on the pump shaft, and an annular cavity is provided between the shaft sleeve and the sealing body, and a packing ring, a packing, a wave spring, and a retaining ring are provided in the annular cavity from bottom to top, and the sealing body 801 is fixed to the pump cover with bolts.

[0013] In a specific embodiment of the present invention, the integrated self-adjusting packing sealing system further includes two O-rings, one of which is located between the sleeve and the pump shaft, and the other is located between the sealing body and the pump cover.

[0014] In a specific embodiment of the present invention, the impeller fixing component is a bolt.

[0015] The present invention provides a positive improvement in that it provides a single-stage pipeline pump with a dynamic seal and an integrated packing seal. The operating seal utilizes a secondary impeller dynamic seal, while the shutdown seal utilizes an integrated self-adjusting packing seal system. The combined use of these two seals addresses the problems of existing mechanical seals, particularly the high cost of mechanical seals, the complexity of external systems, the high investment cost, and the high maintenance costs associated with operating conditions such as solid particulate impurities and corrosive conditions.

[0016] This invention utilizes a self-adjusting packing seal system consisting of packing and a wave spring, achieving dynamic balance in sealing pressure and significantly improving reliability and service life. Its simple structure and ease of manufacture eliminate the need for periodic manual adjustment of the clamping force and maintenance. It addresses the sealing challenges faced by pipeline pumps in harsh operating conditions, such as those involving solid particulate matter and corrosive environments.

[0017] The present invention adopts an integrated self-adjusting packing sealing system, and the interface dimensions and pump cover design of the system are designed in accordance with existing general standards. This solves the problem that most existing solutions adopt two independent sets of pump covers and sealing chamber designs, which have high investment costs, high factory and customer inventory and management costs, and poor maintenance flexibility and high costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2-1 This is the main view of the auxiliary impeller dynamic seal.

[0020] Figure 2-2 for Figure 2-1 Left sectional view of .

[0021] Figure 3 It is a structural diagram of the integrated self-adjusting packing sealing system.

[0022] The following are the names corresponding to the labels in the present invention:

[0023] Basic base plate 1, pump body 2, impeller 3, pump cover 4, auxiliary impeller dynamic seal 5, motor 6, water retaining ring 7, integrated self-adjusting packing sealing system 8, impeller fixing component 9, pump shaft 10; auxiliary impeller blades 501, auxiliary impeller cover plate 502, sealing body 801, retaining ring 802, wave spring 803, packing 804, packing ring 805, sleeve 806, bolt 807, "O" ring 808. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solutions of the present invention in detail.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention, Figure 2-1 This is the main view of the auxiliary impeller dynamic seal. Figure 2-2 for Figure 2-1 Left sectional view of Figure 3It is a structural schematic diagram of the integrated self-adjusting packing sealing system, as shown in the above figure: the present invention provides a single-stage pipeline pump with a dynamic seal and an integrated packing seal, the single-stage pipeline pump with a dynamic seal and an integrated packing seal includes: a basic base plate 1, a pump body 2, an impeller 3, a pump cover 4, an auxiliary impeller dynamic seal 5, an electric motor 6, a water retaining ring 7, an integrated self-adjusting packing sealing system 8, and an impeller fixing component 9; the entire single-stage pipeline pump is fixed on the basic base plate 1, the pump cover 4 is fixed on the pump body 2, the impeller fixing component 9 fixes the impeller 3 on the pump shaft 10, the water retaining ring 7 is located on the pump shaft and above the integrated self-adjusting packing sealing system 8, the auxiliary impeller dynamic seal 5 and the integrated self-adjusting packing sealing system 8 are both installed on the pump shaft 10, and the auxiliary impeller dynamic seal 5 is located between the integrated self-adjusting packing sealing system 8 and the impeller 3. The impeller fixing component 9 of the present invention can be a bolt.

[0026] The auxiliary impeller dynamic seal 5 of the present invention includes auxiliary impeller blades 501 and an auxiliary impeller cover plate 502. The auxiliary impeller blades 501 are composed of several blades evenly distributed on the auxiliary impeller cover plate 502. The auxiliary impeller blades 501 are spiral-centrifugal in shape, and the auxiliary impeller cover plate 502 is gradually inclined from the hub to the cover plate edge. The auxiliary impeller cover plate (serial number 502) is gradually inclined from the hub to the cover plate edge. Under the centrifugal force of the auxiliary impeller blades (serial number 501), the liquid and its accompanying particulate impurities move to the edge of the auxiliary impeller cover plate (serial number 502). The tilted cover plate's gravity flow accelerates the discharge of liquid and particles, improving sealing performance.

[0027] The auxiliary impeller blades 501 of the present invention are 4 to 8 in number, and the figure shows 6 in number. The auxiliary impeller blades 501 of the present invention and the auxiliary impeller cover plate 502 are cast as one body.

[0028] The integrated self-adjusting packing seal system 8 of the present invention includes a sealing body 801, a retaining ring 802, a wave spring 803, packing 804, a packing ring 805, a sleeve 806, and bolts 807. The sleeve 806 is mounted on the pump shaft, and an annular cavity is provided between the sleeve 806 and the sealing body 801. Within the annular cavity, the packing ring 805, the packing 804, the wave spring 803, and the retaining ring 802 are sequentially arranged from bottom to top. The sealing body 801 is secured to the pump cover 4 with bolts 807. The wave spring (serial number 803) automatically adjusts its spring force according to changes in system pressure. Its simple structure makes it easy to design and purchase, and it has excellent dynamic tracking characteristics. This achieves dynamic balance in sealing pressure, significantly improving reliability and service life, and avoiding the need for regular manual adjustment of the clamping force. This solves the sealing problem of pipeline pumps in harsh operating conditions such as those containing solid particulate impurities and corrosive environments.

[0029] The integrated self-adjusting packing sealing system 8 of the present invention further includes two O-rings 808 , one of which is located between the shaft sleeve 806 and the pump shaft, and the other is located between the sealing body 801 and the pump cover 4 .

[0030] The auxiliary impeller dynamic seal of the present invention offsets the leakage pressure of the medium through the centrifugal pressure field generated by the rotation of the auxiliary impeller. It is a contactless, zero-leakage fluid dynamic sealing system with a simple structure, good operating sealing effect, strong maintenance-free performance, and a long sealing life cycle.

[0031] The present invention utilizes a secondary impeller dynamic seal for the operating seal and an integrated self-adjusting packing seal system for the shutdown seal. This combination addresses the challenges of existing mechanical seals, particularly the high cost, complex external systems, and high investment and maintenance costs associated with operating conditions such as solid particle impurities and corrosive conditions.

[0032] This invention utilizes a self-adjusting packing seal system consisting of packing and a wave spring, achieving dynamic balance in sealing pressure and significantly improving reliability and service life. Its simple structure and ease of manufacture eliminate the need for periodic manual adjustment of the clamping force and maintenance. It addresses the sealing challenges faced by pipeline pumps in harsh operating conditions, such as those involving solid particulate matter and corrosive environments.

[0033] The present invention adopts an integrated self-adjusting packing sealing system, and the interface dimensions and pump cover design of the system are designed in accordance with existing general standards. This solves the problem that most existing solutions adopt two independent sets of pump covers and sealing chamber designs, which have high investment costs, high factory and customer inventory and management costs, and poor maintenance flexibility and high costs.

[0034] The present invention combines a dynamic seal for the auxiliary impeller with an integrated self-adjusting packing seal system, offering a simple structure and strong adaptability to various operating conditions. It can achieve superior sealing performance with low investment, particularly in conditions involving solid particulate matter and corrosive environments. This solves the existing problems of expensive mechanical seals, complex external systems, high investment costs, and high maintenance costs, particularly addressing the sealing challenges faced by pipeline pumps in harsh operating conditions such as those involving solid particulate matter and corrosive environments.

[0035] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. A single-stage pipeline pump with a dynamic seal and an integrated packing seal, characterized in that: The single-stage pipeline pump with a dynamic seal and an integrated packing seal includes: a basic base plate, a pump body, an impeller, a pump cover, an auxiliary impeller dynamic seal, an electric motor, a water retaining ring, an integrated self-adjusting packing sealing system, and an impeller fixing component; the entire single-stage pipeline pump is fixed on the basic base plate, the pump cover is fixed on the pump body, the impeller fixing component fixes the impeller on the pump shaft, the water retaining ring is located on the pump shaft and above the integrated self-adjusting packing sealing system, the auxiliary impeller dynamic seal and the integrated self-adjusting packing sealing system are both installed on the pump shaft, and the auxiliary impeller dynamic seal is located between the integrated self-adjusting packing sealing system and the impeller.

2. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The auxiliary impeller dynamic seal includes auxiliary impeller blades and auxiliary impeller cover plates; the auxiliary impeller blades include several pieces, which are evenly distributed on the auxiliary impeller cover plates. The shape of the auxiliary impeller blades is spiral centrifugal, and the auxiliary impeller cover plates are gradually inclined from the hub to the edge of the cover plates.

3. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 2, characterized in that: The number of auxiliary impeller blades is 4-8.

4. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The auxiliary impeller blades and the auxiliary impeller cover are cast as one piece.

5. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The integrated self-adjusting packing seal system includes a sealing body, a retaining ring, a wave spring, a packing, a packing ring, a shaft sleeve, and bolts; the shaft sleeve is sleeved on the pump shaft, and an annular cavity is provided between the shaft sleeve and the sealing body. The packing ring, the packing, the wave spring, and the retaining ring are arranged in the annular cavity from bottom to top. The sealing body 801 is fixed to the pump cover with bolts.

6. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 5, characterized in that: The integrated self-adjusting stuffing box seal system also includes two "O" rings, one "O" ring is located between the sleeve and the pump shaft, and the other "O" ring is located between the seal body and the pump cover.

7. The single-stage pipeline pump with dynamic seal and integrated packing seal according to claim 1, characterized in that: The impeller fixing parts are bolts.

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