A new type of cooling chamber for multi-stage centrifugal pump

Abstract

The utility model discloses a novel multi-stage centrifugal pump cooling cavity, a shell and a bearing body, a cooling cavity is installed between the shell and the bearing body, a tail cavity is arranged between the shell and the cooling cavity, a cooling cavity is arranged between the cooling cavity and the bearing body, a cooling cavity pressure plate (is installed inside the cooling cavity, the cooling cavity pressure plate (is adjacent to the bearing body on the side away from the cooling cavity, a shaft seal cavity is opened inside the cooling cavity, and a return pipe interface, a shaft seal flushing port 1, a pressure monitoring port, a shaft seal flushing port 2, a coolant interface 1 and a coolant interface 2 are sequentially arranged outside the cooling cavity. The cooling cavity assembly of the utility model can realize 360° free rotation and free reversal of the water inlet, and can adapt to installation without replacing the return pipe and the shaft seal flushing pipe. At the same time, the pressure monitoring port is communicated with the tail cavity, and cooperates with the pressure sensor to monitor the tail cavity pressure in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-stage centrifugal pumps, in particular to a novel cooling cavity of a multi-stage centrifugal pump. Background Art

[0002] When the multi-stage centrifugal pumps in the existing market are conveying high-temperature liquid media, the heat transfer can easily cause the bearing body temperature to rise, affecting the service life of the bearings, and in severe cases, causing the pump to fail to operate normally; in order to solve this problem, the existing structure generally sets a cooling cavity on the end face of the pump casing, and the external coolant enters the cooling cavity during cooling to take away the heat transfer. In actual use, it is possible to dock and install the inlet and outlet pipes in multiple directions according to local conditions, and the inlet and outlet directions of the multi-stage pump have to be switched. Since the existing cooling cavity and the pump casing are integrated, when switching the pump inlet and outlet directions, the original location of the cooling cavity return pipe interface must be changed. When installing the return pipe, due to the switching of the pump inlet and outlet, multiple parts must be made to meet the needs, which increases the number of parts and brings certain troubles to storage and stocking. With the upgrading of intelligent industry, the original cooling cavity cannot realize data collection in the tail cavity due to structural limitations, which brings obstacles to the upgrading of industry intelligence. Utility Model Content

[0003] The utility model aims to provide a novel multistage centrifugal pump cooling cavity, a shell and a bearing body, a cooling cavity is installed between the shell and the bearing body, a tail cavity is arranged between the shell and the cooling cavity, a cooling cavity is arranged between the cooling cavity and the bearing body, a cooling cavity pressure plate is installed inside the cooling cavity, the cooling cavity pressure plate (the side away from the cooling cavity is adjacent to the bearing body, a shaft seal cavity is opened inside the cooling cavity, and a return pipe interface, a shaft seal flushing port 1, a pressure monitoring port, a shaft seal flushing port 2, a coolant interface 1 and a coolant interface 2 are arranged in sequence outside the cooling cavity.

[0004] As a preferred embodiment of this embodiment, a circular female opening is designed on the shell, and a circular male opening is designed on the cooling cavity. The shell and the cooling cavity are fixed by bolts, and the bolts pass through the cooling cavity.

[0005] As a preferred embodiment of this embodiment, the shaft seal flushing port 1 is perpendicular to the axis of the shaft seal flushing port 2, and the shaft seal flushing port 1 and the shaft seal flushing port 2 are connected to the shaft seal cavity.

[0006] As a preferred embodiment of this embodiment, the return pipe interface is externally connected to a return pipe, and the return pipe interface and the pressure monitoring port are both connected to the tail end cavity.

[0007] Through the above technical solution, the beneficial effects of the utility model are:

[0008] The utility model adopts the matching design of male and female stoppers, and the cooling cavity assembly can realize free rotation of degrees. After the water inlet can be freely reversed, it can be installed without replacing the return pipe and the shaft seal flushing pipe. At the same time, the pressure monitoring port is connected to the tail end cavity, and with the pressure sensor, the tail end cavity pressure can be monitored in real time, realizing intelligent upgrading and reducing labor costs. In addition, the split design of the pump casing and the cooling cavity can reduce the replacement cost of parts during maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a partial cross-sectional structural diagram of the cooling cavity installed in the novel multi-stage centrifugal pump of the utility model;

[0010] Figure 2 This is a schematic diagram of the cross-sectional structure of the cooling cavity of the utility model;

[0011] Figure 3 This is a schematic diagram of the structure of one side of the cooling cavity of the utility model;

[0012] Figure 4 This is a schematic diagram of the top water inlet structure of the new multi-stage centrifugal pump of the utility model.

[0013] In the figure: 1 shell, 2 tail end cavity, 3 cooling cavity, 4 cooling cavity, 5 cooling cavity pressure plate, 6 bearing body, 7 return pipe, 8 shaft seal cavity, 9 return pipe interface, 10 shaft seal flushing port 1, 11 pressure monitoring port, 12 shaft seal flushing port 2, 13 coolant interface 1, 14 coolant interface 2. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-4 As shown, the utility model provides a novel multi-stage centrifugal pump cooling cavity, a shell 1 and a bearing body 6, a cooling cavity 3 is installed between the shell 1 and the bearing body 6, a tail cavity 2 is provided between the shell 1 and the cooling cavity 3, a cooling cavity 4 is provided between the cooling cavity 3 and the bearing body 6, a cooling cavity pressure plate 5 is installed inside the cooling cavity 4, the cooling cavity pressure plate (5 is adjacent to the bearing body 6 on the side away from the cooling cavity 4, a shaft seal cavity 8 is opened inside the cooling cavity 3, and a return pipe interface 9, a shaft seal flushing port 1 10, a pressure monitoring port 11, a shaft seal flushing port 2 12, a coolant interface 1 13 and a coolant interface 2 14 are sequentially provided outside the cooling cavity 3.

[0016] Among them, the cooling cavity and the pump casing are designed to be separated, and the cooling cavity is divided into two parts: the shaft seal cavity and the cooling cavity. A sealed pipeline is formed through coolant interface 1, coolant interface 2, the cooling cavity, and the cooling cavity pressure plate. The flow of coolant takes away the heat and transfers it to the bearing body; two mutually perpendicular shaft seal flushing interfaces are also reserved on the periphery of the cooling cavity, and the shaft seal flushing port is connected to the shaft seal cavity.

[0017] Furthermore, a circular female port is designed on the shell 1, and a circular male port is designed on the cooling cavity 3. The shell 1 and the cooling cavity 3 are fixed by bolts, and the bolts pass through the cooling cavity.

[0018] Specifically, the matching design of the male and female stoppers allows the cooling chamber assembly to rotate 360° freely, and the water inlet can be freely reversed, which can adapt to installation without replacing the return pipe and shaft seal flushing pipe.

[0019] In addition, the separate design of the pump casing and the cooling chamber can reduce the replacement cost of parts during maintenance and replacement.

[0020] Furthermore, the shaft seal flushing port 1 10 and the shaft seal flushing port 2 12 are perpendicular to the axis, and the shaft seal flushing port 1 10 and the shaft seal flushing port 2 12 are connected to the shaft seal cavity 8 .

[0021] Furthermore, the return pipe interface 9 is externally connected to the return pipe 7 , and the return pipe interface 9 and the pressure monitoring port 11 are both in communication with the tail end cavity 2 .

[0022] Specifically, the pressure monitoring port is connected to the tail end cavity, and with the pressure sensor, it can monitor the tail end cavity pressure in real time, realize intelligent upgrades, and reduce labor costs.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel multi-stage centrifugal pump cooling chamber, characterized in that: A shell (1) and a bearing body (6), a cooling cavity (3) is installed between the shell (1) and the bearing body (6), a tail cavity (2) is provided between the shell (1) and the cooling cavity (3), a cooling cavity (4) is provided between the cooling cavity (3) and the bearing body (6), a cooling cavity pressure plate (5) is installed inside the cooling cavity (4), the cooling cavity pressure plate (5) is adjacent to the bearing body (6) on the side facing away from the cooling cavity (4), a shaft seal cavity (8) is opened inside the cooling cavity (3), and a return pipe interface (9), a shaft seal flushing port 1 (10), a pressure monitoring port (11), a shaft seal flushing port 2 (12), a coolant interface 1 (13) and a coolant interface 2 (14) are sequentially provided outside the cooling cavity (3).

2. According to claim 1, a novel multi-stage centrifugal pump cooling chamber is characterized in that: The shell (1) is designed with a circular female port, and the cooling cavity (3) is designed with a circular male port. The shell (1) and the cooling cavity (3) are fixed by bolts.

3. According to claim 1, a novel multi-stage centrifugal pump cooling chamber is characterized in that: The shaft seal flushing port 1 (10) and the shaft seal flushing port 2 (12) are perpendicular to the axis, and the shaft seal flushing port 1 (10) and the shaft seal flushing port 2 (12) are connected to the shaft seal cavity (8).

4. The novel multi-stage centrifugal pump cooling chamber according to claim 1 is characterized in that: The water return pipe interface (9) is externally connected to a water return pipe (7), and the water return pipe interface (9) and the pressure monitoring port (11) are both in communication with the tail end cavity (2).

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