An axial flow pump with a soft packing seal

Abstract

This utility model discloses an axial flow pump with a soft packing seal, including a sealing gland, a sealing gland mounted on the sealing gland, a sealing sleeve installed inside the sealing gland and the sealing gland, a pump shaft passing through the sealing sleeve, and the sealing sleeve being fixedly connected to the pump shaft by a key. A throttling ring, a water seal ring, packing, and flocculent packing are installed between the sealing gland, the sealing gland, and the sealing sleeve. Two O-rings are installed between the sealing sleeve and the pump shaft. This utility model addresses the problems of high clamping force and increased wear on the surface of the shaft sleeve caused by hard packing seals, as well as high leakage due to low clamping force. It also solves the problems of mechanical seals being unsuitable for low-speed equipment and leakage caused by particulate matter in the medium.

Description

Technical Field

[0001] This utility model relates to the field of chemical axial flow pump technology, and in particular to an axial flow pump with a soft packing seal. Background Technology

[0002] Axial flow pumps are suitable for applications with high flow rates and low head, and are used for forced circulation of various easily crystallizing saturated solutions in evaporation and concentration devices in industries such as alkali production, salt production, citric acid production, and sodium sulfate production.

[0003] Currently, for axial flow pumps with traditional mechanical seals and hard packing seals, the following problems are usually encountered during pump operation: hard packing seals have high clamping force, causing seal heat and accelerated wear on the shaft sleeve surface; low clamping force results in large leakage. Mechanical seals are not suitable for low-speed equipment, and when the medium contains particles, it will aggravate the wear of the sealing surface and cause leakage.

[0004] In view of the problems existing in the prior art, it is necessary to study and design an axial flow pump with soft packing seal to overcome the problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide an axial flow pump with a soft packing seal, which solves the problems of high clamping force, increased heat generation and wear on the shaft sleeve surface, and low clamping force and large leakage caused by hard packing seals; it also solves the problems of mechanical seals being unsuitable for low-speed equipment and leakage caused by the presence of particles in the medium.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides an axial flow pump with a soft packing seal, comprising:

[0007] A sealing box body is provided, on which a sealing gland is installed. A sealing bushing is installed inside the sealing box body and the sealing gland. A pump shaft passes through the sealing bushing, and the sealing bushing is fixedly connected to the pump shaft by a key. A throttling ring, a water seal ring, packing, and flocculent packing are installed between the sealing box body, the sealing gland, and the sealing bushing. Two O-rings are installed between the sealing bushing and the pump shaft.

[0008] The present invention discloses the following technical effects: 1. The present invention provides an axial flow pump with a soft packing seal. The sealing part consists of a throttling ring, a water seal ring, a packing seal, and a flocculent seal. The throttling ring is placed deep in the casing to throttle and restrict the entry of medium particles into the seal. The water seal ring is used for lubrication and cooling, and the flushing fluid can also wash away the particles accumulated at the throttling ring. The packing seal and the flocculent seal are used together to enhance the sealing effect, reduce shaft sleeve wear, and a packing filling port is added to the casing. When the leakage increases, flocculent packing can be added without stopping the pump.

[0009] This invention solves the problems of high clamping force, heat generation, and increased wear on the surface of the bushing in existing axial flow pumps using hard packing seals, as well as low clamping force and large leakage; it also solves the problems of mechanical seals being unsuitable for low-speed equipment and leakage caused by the presence of particles in the medium. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This utility model relates to an axial flow pump with a soft packing seal.

[0012] Among them, 1. sealing shaft sleeve; 2. sealing gland; 3. packing; 4. flocculent packing; 5. sealing box body; 6. water seal ring; 7. throttling ring; 8. O-ring seal; 9. pump shaft. Detailed Implementation

[0013] 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.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Reference Figure 1 This utility model provides an axial flow pump with a soft packing seal, comprising:

[0016] A sealing gland 5 is provided, and a sealing gland 2 is installed on the sealing gland 5. A sealing sleeve 1 is installed inside the sealing gland 5 and the sealing gland 2. A pump shaft 9 passes through the sealing sleeve 1. The sealing sleeve 1 is fixedly connected to the pump shaft 9 by a key. A throttling ring 7, a water seal ring 6, a packing 3, and a flocculent packing 4 are installed between the sealing gland 5, the sealing gland 2, and the sealing sleeve 1. Two O-ring seals 8 are installed between the sealing sleeve 1 and the pump shaft 9.

[0017] In the sealing cavity formed by the sealing gland 5 and the sealing sleeve 1, the throttling ring 7 is the first to contact the medium. In addition to its throttling effect, it can also limit the entry of particles into the sealing cavity. The number of throttling rings 7 is determined according to the size of the axial flow pump. Figure 1The pump consists of two rings: a throttling ring 7 followed by a water seal ring 6, which introduces flushing fluid to form a lubricating film between the pump shaft 9 and the seal, reducing friction and carrying away the heat generated by friction. Simultaneously, the flushing fluid washes away particles accumulated at the throttling ring 7. Following the water seal ring 6 are a packing seal 3 and a flocculent seal 4. The packing seal 3 and flocculent seal 4 work together to enhance the sealing effect and effectively prevent leakage. The sealing body 5 has a packing filler port, allowing for the addition of flocculent packing without stopping the pump when leakage increases, improving seal lifespan and facilitating maintenance. The flocculent seal 4 is placed between the packing seals 3. The number of packing seals 3 depends on the size of the axial flow pump. Figure 1 There are 4 lanes in the middle.

[0018] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "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 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.

[0019] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An axial flow pump with a soft packing seal, characterized in that, include: A sealing box (5) is provided, on which a sealing gland (2) is installed. A sealing bushing (1) is installed inside the sealing box (5) and the sealing gland (2). A pump shaft (9) passes through the sealing bushing (1). The sealing bushing (1) is fixedly connected to the pump shaft (9) by a key. A throttling ring (7), a water seal ring (6), packing (3), and flocculent packing (4) are installed between the sealing box (5), the sealing gland (2), and the sealing bushing (1). Two O-ring seals (8) are installed between the sealing bushing (1) and the pump shaft (9).

Images