Special mechanical sealing process stirring device for closed container

Abstract

The utility model discloses a special mechanical sealing process stirring device for a closed container, which comprises a motor, a high-speed shaft coupling, a speed reducer, a low-speed shaft coupling, a lower half shaft, a bracket bearing seat, a coupling nipple, a mechanical sealer, a restrictor ring component, an upper half shaft, a stirrer component, an external flushing interface, a special mechanism for removing a mechanical seal, a sealing liquid circulating pump station and a frequency converter, the special mechanical sealing process stirring device for the closed container is driven by the motor, the frequency converter is used for matching the rotating speed, accurately transmitting torque and driving the stirrer assembly to operate, electric energy is converted into mechanical energy, the device is easy and convenient to disassemble and assemble, the maintenance frequency of a mechanical sealing device is low, and safety and reliability are achieved. The economic loss and the energy consumption loss caused by shutdown of the process stirring device due to the failure of the mechanical sealer can be reduced, and the operation intensity and the debugging intensity of maintenance personnel are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal process stirring device special for a closed container. Background Art

[0002] Due to advantages such as stable sealing state, small leakage amount, long service life, good seismic resistance, and wide application range, mechanical seals are widely used in the process stirring devices of production and storage units. It mainly consists of a dynamic ring, a static ring, elastic components, etc. The structure conforms to the mechanical design principle. During operation, a very small gap is formed between the dynamic and static rings and the sealing end faces. The sealing medium adheres to the sealing end faces to form a lubricating liquid film with relative movement, which plays a sealing role for the overall process stirring device.

[0003] For the mechanical seal process stirring devices of most intermittently produced closed containers, the pressure of the mechanical seal changes periodically with the rotation of the dynamic and static rings and the main shaft. Thermal accumulation causes thermal deformation of the sealing end faces, affecting the sealing performance of the mechanical seal. The axial offset of the dynamic and static rings and the main shaft during operation causes uneven stress and wear of the mechanical seal, seriously affecting the stability of the mechanical seal, resulting in high maintenance frequency of the device and short service life. After the mechanical seal is repaired and put into operation again, the operation of the device is not ideal either. The leakage amount gradually increases with the operation time of the device, and finally it has to be shut down for replacement. Content of the Utility Model

[0004] The purpose of the utility model is to provide a mechanical seal process stirring device special for a closed container with simple disassembly and assembly, low maintenance frequency of the mechanical seal, safety and reliability, which can reduce the economic loss and energy consumption loss caused by the shutdown of the process stirring device due to the failure of the mechanical seal, and reduce the operation intensity and debugging intensity of maintenance personnel.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A mechanical seal process stirring device special for a closed container, characterized by comprising: a motor, a high-speed shaft coupling, a speed reducer, a low-speed shaft coupling, a lower half shaft, a bracket bearing seat, a coupling short section, a mechanical seal, a throttle ring assembly, an upper half shaft, a stirrer assembly, an external flushing interface, a special mechanism for removing the mechanical seal, a sealed liquid circulation pump station, and a frequency converter; the high-speed shaft end of the speed reducer is connected to the motor through the high-speed shaft coupling; the low-speed shaft end of the speed reducer is connected to the lower half shaft through the low-speed shaft coupling; the lower half shaft is connected to the upper half shaft through the coupling short section and then sequentially connected to the mechanical seal, the throttle ring assembly, and the stirrer assembly; the mechanical seal is installed between the upper half shaft and the closed container housing and is jointly installed inside the bracket bearing seat with the upper half shaft and the lower half shaft.

[0007] According to an embodiment of the present utility model, the low-speed shaft of the speed reducer, the low-speed shaft coupling, the lower half shaft, the bracket bearing seat, the coupling short section, the mechanical seal, the throttle ring assembly, the upper half shaft, and the agitator assembly are installed concentrically.

[0008] According to an embodiment of the present utility model, the throttle ring assembly is installed at the sealing surface of the bottom of the mechanical seal and the closed container housing, and is provided with the external flushing interface. The external flushing interface is established at the water inlet of the throttle ring assembly to prevent the mechanical seal surface from wearing and failing. The flushing medium flows through the throttle ring assembly from the external flushing interface into the interior of the closed container, forming a local reduced diameter state at the throttle ring assembly, generating a pressure reduction and speed increase phenomenon. The greater the flow rate of the flushing medium, the greater the pressure difference generated.

[0009] According to an embodiment of the present utility model, the stationary ring seat of the mechanical seal is composed of an upper stationary ring seat and a lower stationary ring seat in a two-piece form, and an O-ring seal is provided at the connection.

[0010] According to an embodiment of the present utility model, the sealing medium is pumped into the mechanical seal by the seal liquid circulation pumping station.

[0011] According to an embodiment of the present utility model, the sealing medium is pressurized, pumped, and circulated by the seal liquid circulation pumping station to prevent the leakage of the internal materials of the equipment, lubricate the friction parts of the mechanical seal, reduce the heat load, prevent the mechanical seal from being damaged by overheating. At the same time, it ensures that the pressure of the sealing medium is higher than the pressure of the closed container when the sealing surface of the device fails.

[0012] According to an embodiment of the present utility model, a special mechanism for removing the mechanical seal is provided at the bottom of the bracket bearing seat, which can provide convenience for disassembly and assembly when the mechanical seal of the process stirring device fails.

[0013] According to an embodiment of the present utility model, the device is driven by the motor, and the speed is matched by the frequency converter to accurately transmit the torque, driving the agitator assembly to operate, realizing the conversion of electrical energy into mechanical energy. Description of the Drawings

[0014] Figure 1 It is a structural diagram of the device of the present utility model.

[0015] Figure 1 In the figure: 1 is the motor; 2 is the high-speed shaft coupling; 3 is the speed reducer; 4 is the low-speed shaft coupling; 5 is the lower half shaft; 6 is the bracket bearing seat; 7 is the coupling short section; 8 is the mechanical seal; 9 is the throttle ring assembly; 10 is the upper half shaft; 11 is the agitator assembly; 12 is the external flushing interface; 13 is the special mechanism for removing the mechanical seal; 14 is the seal liquid circulation pumping station; 15 is the frequency converter.

[0016] Figure 2This is the structural diagram of the mechanical seal of the present utility model.

[0017] Figure 2 Among them: 81 is the upper static seal seat; 82 is the lower static seal seat; 83 is the O-ring seal. Specific embodiments

[0018] The following combines the drawings in the examples of the present utility model to elaborate in detail on the technical solutions in the examples of the present utility model. The reference numerals refer to the components and technologies in the present utility model, so that the advantages and features of the present utility model are more easily understood. The following description is a specific implementation of the claims of the present utility model, and other specific implementations related to the claims that are not described also belong to the scope of the claims. Embodiment

[0019] Refer to the attached Figure 1-2 The purpose of the present utility model is to provide a mechanical seal process stirring device for a special closed container with simple disassembly and assembly, low maintenance frequency of the mechanical seal, safety and reliability, which can reduce the economic losses and energy consumption losses caused by the shutdown of the process stirring device due to mechanical seal failures, and reduce the operation intensity and debugging intensity of maintenance personnel.

[0020] Figure 1 A structural diagram of a mechanical seal process stirring device for a special closed container is shown.

[0021] As Figure 1 shown, a mechanical seal process stirring device for a special closed container includes a motor 1, a high-speed shaft coupling 2, a speed reducer 3, a low-speed shaft coupling 4, a lower half shaft 5, a bracket bearing seat 6, a coupling short section 7, a mechanical seal 8, a throttle ring assembly 9, an upper half shaft 10, a stirrer assembly 11, an external flushing interface 12, a special mechanism for removing the mechanical seal 13, a sealed liquid circulation pump station 14, and a frequency converter 15; the high-speed shaft end of the speed reducer 3 is connected to the motor 1 through the high-speed shaft coupling 2; the low-speed shaft end of the speed reducer 3 is connected to the lower half shaft 5 through the low-speed shaft coupling 4; the lower half shaft 5 is connected to the upper half shaft 10 through the coupling short section 7 and then successively connected to the mechanical seal 8, the throttle ring assembly 9, and the stirrer assembly 11; the mechanical seal 8 is jointly installed inside the bracket bearing seat 6 with the upper half shaft 10 and the lower half shaft 5.

[0022] The speed reducer 3, the low-speed shaft coupling 4, the lower half shaft 5, the bracket bearing seat 6, the coupling short section 7, the mechanical seal 8, the throttle ring assembly 9, the upper half shaft 10, and the stirrer assembly 11 are installed with concentricity.

[0023] The throttle ring assembly 9 is installed at the sealing surface between the mechanical seal 8 and the bottom of the closed container housing, and is provided with the external flushing interface 12.

[0024] The external flushing interface 12 is provided at the water inlet of the throttle ring assembly 9 to prevent the mechanical seal surface from wearing out and failing.

[0025] Figure 2 A structural diagram of a mechanical seal for a special mechanical seal process stirring device of a closed container is shown.

[0026] As Figure 2 As shown, for a special mechanical seal process stirring device of a closed container, the stationary ring seat of the mechanical seal 8 is composed of an upper stationary ring seat 81 and a lower stationary ring seat 82 in a two-piece form, and an O-ring 83 is provided at the connection.

[0027] The sealing medium is pressurized, pumped, and circulated by the sealing liquid circulation pump 14 station to prevent the leakage of the internal materials of the equipment, lubricate the friction parts of the mechanical seal, reduce the heat load, prevent the mechanical seal from being damaged due to overheating. At the same time, it ensures that when the sealing surface of the device fails, the pressure of the sealing medium is higher than the pressure of the closed container.

[0028] The special mechanism 13 for removing the mechanical seal can provide convenience for disassembly and assembly when the mechanical seal 8 of the process stirring device fails.

[0029] A special process stirring device for a closed container is driven by the motor 1, and the speed is matched by the frequency converter 15 to accurately transmit the torque, driving the stirrer assembly 11 to operate, realizing the conversion of electrical energy into mechanical energy.

[0030] The beneficial effects of the present utility model are:

[0031] For a special mechanical seal process stirring device of a closed container, the stationary ring seat of the mechanical seal is composed of an upper stationary ring seat and a lower stationary ring seat in a two-piece form, and an O-ring is provided at the connection, which can reduce the axial offset of the dynamic and static rings and the main shaft during operation, reduce the maintenance frequency of the mechanical seal, extend the service life, and reduce the production cost;

[0032] The flushing medium flows through the throttle ring assembly from the external flushing interface into the interior of the closed container, forming a locally reduced diameter state at the throttle ring assembly, generating a pressure reduction and speed increase phenomenon. The greater the flow rate of the flushing medium, the greater the pressure difference generated.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model in a simplified manner, rather than indicating or implying that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the claims, any reference signs and labels located between parentheses should not be construed as limiting the claims.

[0034] The above are the preferred embodiments of the present utility model, not an exhaustive or limiting the present utility model to the disclosed forms, and those skilled in the art can design alternative embodiments with various modifications suitable for specific uses without departing from the scope of the appended claims. Changes such as adding or equivalent substitution according to the technical solution and inventive concept of the present utility model should all be covered within the protection scope of the present utility model.

Claims

1. A mechanical sealing process stirring device for a closed container, characterized in that: include: Motor (1), high-speed shaft coupling (2), reducer (3), low-speed shaft coupling (4), lower half shaft (5), bracket bearing seat (6), coupling short section (7), mechanical seal (8), throttling ring assembly (9), upper half shaft (10), agitator assembly (11), external flushing interface (12), special mechanism for mechanical seal removal (13), sealing liquid circulation pump station (14), frequency converter (15); the high-speed shaft end of the reducer (3) is connected to the motor (1) through the high-speed shaft coupling (2). The low-speed shaft end of the reducer (3) is connected to the lower half shaft (5) via the low-speed shaft coupling (4); the lower half shaft (5) is connected to the upper half shaft (10) via the coupling short section (7) and then sequentially connected to the mechanical seal (8), the throttle ring assembly (9) and the agitator assembly (11); the mechanical seal (8) is installed between the upper half shaft (10) and the closed container shell, and is installed together with the upper half shaft (10) and the lower half shaft (5) inside the bracket bearing seat (6).

2. A mechanical sealing process stirring device for a closed container according to claim 1, characterized in that: The reducer (3), low-speed shaft coupling (4), lower half shaft (5), bracket bearing seat (6), coupling short section (7), mechanical seal (8), throttle ring assembly (9), upper half shaft (10), and agitator assembly (11) are installed to maintain concentricity.

3. A mechanical sealing process stirring device for a closed container according to claim 1 or 2, characterized in that: The throttling ring assembly (9) is mounted on the sealing surface between the mechanical seal (8) and the bottom of the closed container shell, and is provided with the external flushing interface (12).

4. The mechanical sealing process stirring device for a closed container according to claim 1, characterized in that: The static ring seat of the mechanical sealer (8) is composed of two sections, an upper static ring seat (81) and a lower static ring seat (82), and an O-type sealing ring (83) is provided at the connection.

5. The mechanical sealing process stirring device for a closed container according to claim 1, characterized in that: The sealing medium is pumped into the mechanical seal (8) by the sealing liquid circulation pump station (14).

6. A mechanical sealing process stirring device for a closed container according to claim 1, characterized in that: The bottom of the bracket bearing seat (6) is provided with a special mechanism (13) for removing the mechanical seal.

7. The mechanical sealing process stirring device for a closed container according to claim 1, characterized in that: The device is driven by the motor (1), and the frequency converter (15) matches the rotation speed, accurately transmits the torque, drives the stirrer assembly (11) to operate, and realizes the conversion of electrical energy into mechanical energy.

Images