Agitator capable of detecting leakage of inner mechanical seal

Abstract

The utility model discloses an agitator capable of detecting leakage of an inner mechanical seal, and relates to the technical field of agitators. An agitator capable of detecting leakage of an inner mechanical seal comprises: a casing, a motor, an impeller, a bearing housing, a front end bearing, a skeleton oil seal, an inner mechanical seal, an outer mechanical seal and a float switch; the casing comprises a spliced ​​motor casing and a mechanical seal cover; the motor is arranged inside the motor casing, and the motor main shaft passes through the mechanical seal cover and extends to the outside of the mechanical seal cover; the impeller is fixedly connected to the end of the motor main shaft; the bearing housing is arranged inside the casing and between the motor casing and the mechanical seal cover, a front end bearing is arranged on the bearing housing, and the motor main shaft is rotatably connected to the front end bearing; the skeleton oil seal, the inner mechanical seal and the outer mechanical seal are arranged on the motor main shaft in sequence. The utility model designs an agitator capable of detecting leakage of an inner mechanical seal, and can effectively detect whether the inner mechanical seal of the agitator is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of agitators, in particular to an agitator capable of detecting leakage of an inner mechanical seal. Background Art

[0002] For agitators that run underwater for a long time, mechanical seals are key components of the agitator. Generally speaking, an inner mechanical seal is set inside the agitator on the outside of the motor main shaft and close to the motor. The inner mechanical seal is used to prevent contaminated media from entering the motor along the motor main shaft.

[0003] When the agitator is working underwater, if the inner mechanical seal is damaged and fails to alarm in time, the bearings inside the agitator will inevitably be contaminated. Even the contaminated medium will pass through the damaged inner mechanical seal along the motor main shaft into the motor and damage the motor.

[0004] Therefore, when the agitator is operating normally, how to effectively detect whether the inner mechanical seal of the agitator is damaged is a technical problem that the technicians in this field need to solve urgently.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] In view of the above technical problems, an embodiment of the utility model provides an agitator capable of detecting leakage of an inner mechanical seal, so as to solve the problems raised in the above background technology.

[0007] The utility model provides the following technical solutions:

[0008] A stirrer capable of detecting leakage of an inner mechanical seal, comprising:

[0009] Casing, motor, impeller, bearing housing, front end bearing, skeleton oil seal, inner mechanical seal, outer mechanical seal and float switch;

[0010] The casing includes a spliced ​​motor casing and a machine seal cover casing;

[0011] The motor is arranged inside the motor housing, and the motor main shaft passes through the machine seal housing and extends to the outside of the machine seal housing;

[0012] The impeller is fixedly connected to the end of the motor main shaft;

[0013] The bearing housing is arranged inside the casing and between the motor casing and the machine seal cover casing. A front end bearing is arranged on the bearing housing, and the motor main shaft is rotatably connected with the front end bearing.

[0014] The skeleton oil seal, the inner mechanical seal and the outer mechanical seal are arranged on the main shaft of the motor in sequence, and the skeleton oil seal is located at the front side of the bearing housing, the inner mechanical seal is located at the rear side of the bearing housing, and the outer mechanical seal is located at the outer side of the mechanical seal cover;

[0015] A float switch cavity a is arranged on the side wall of the bearing housing, a flow channel is arranged in the radial direction of the bearing housing, one end of the flow channel extends to the outer side of the front bearing, and the other end of the flow channel is connected to the float switch cavity, and a float switch is arranged in the float switch cavity.

[0016] Preferably, an oil drain hole is provided in the bearing housing in its radial direction, one end of the oil drain hole is connected to the float switch cavity, and the other end of the oil drain hole extends to the outside of the bearing housing; a sealing plug is inserted in the oil drain hole.

[0017] Preferably, the bearing housing is disc-shaped, and the front end bearing is fixed at the center of the bearing housing.

[0018] Preferably, a plurality of weight-reducing grooves arranged at intervals are respectively provided on the two side walls of the bearing housing.

[0019] An agitator capable of detecting leakage of an inner mechanical seal provided by an embodiment of the utility model has the following beneficial effects: The utility model designs an agitator capable of detecting leakage of an inner mechanical seal, and can effectively detect whether the inner mechanical seal of the agitator is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 3 For this utility model Figure 2 A partial enlarged view of middle A;

[0023] Figure 4 For this utility model Figure 3 A partial enlarged view of the middle float switch cavity;

[0024] Figure 5 This is a schematic diagram of the structure of the bearing housing in the utility model;

[0025] Figure 6 For this utility model Figure 5 Cross-section along the middle BB direction;

[0026] Figure 7 For this utility model Figure 6 A partial enlarged view of middle C;

[0027] Figure 8 For this utility model Figure 7 Cross-sectional view along the DD direction. DETAILED DESCRIPTION

[0028] 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 of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-Figure 8 .

[0030] In view of the problems mentioned in the above background technology, the embodiment of the utility model provides a stirrer capable of detecting leakage of an inner mechanical seal to solve the above technical problems. The technical solution is as follows:

[0031] A stirrer capable of detecting leakage of an inner mechanical seal, comprising:

[0032] Casing, motor 140, impeller 130, bearing housing 150, front end bearing 151, skeleton oil seal 161, inner mechanical seal 162, outer mechanical seal 163 and float switch 170;

[0033] The housing 110 includes a motor housing 110 and a machine seal housing 120 which are spliced ​​together; the splicing position of the motor housing 110 and the machine seal housing 120 is sealed, such as installing a sealing ring between the motor housing 110 and the machine seal housing 120;

[0034] The motor 140 is disposed inside the motor housing 110 , and the motor main shaft passes through the machine sealing housing 120 and extends to the outside of the machine sealing housing 120 ;

[0035] The impeller 130 is fixedly connected to the end of the motor main shaft;

[0036] The bearing housing 150 is disposed inside the housing and between the motor housing 110 and the machine seal housing 120. A front bearing 151 is disposed on the bearing housing 150. The motor main shaft is rotatably connected to the front bearing 151.

[0037] The skeleton oil seal 161, the inner mechanical seal 162, and the outer mechanical seal 163 are sequentially arranged on the motor main shaft, and the skeleton oil seal 161 is located at the front side of the bearing housing 150, the inner mechanical seal 162 is located at the rear side of the bearing housing 150, and the outer mechanical seal 163 is located at the outer side of the mechanical seal cover 120;

[0038] Here, the structural shapes of the skeleton oil seal 161, the inner mechanical seal 162, and the outer mechanical seal 163 are not specifically limited, and their shape design requirements can be specifically designed according to their application scenarios and the geometric shapes of specific connecting parts;

[0039] A float switch cavity 150a is provided on the side wall of the bearing housing 150, and a flow channel 150b is provided in the radial direction of the bearing housing 150. One end of the flow channel 150b extends to the outer side surface of the front end bearing 151, and the other end of the flow channel 150b is communicated with the float switch cavity 150a. A float switch 170 is provided in the float switch cavity 150a.

[0040] The working principle of the agitator capable of detecting inner mechanical seal leakage provided by the embodiment of the utility model is as follows:

[0041] 1. A skeleton oil seal 161, an inner mechanical seal 162, and an outer mechanical seal 163 are sequentially arranged on the motor main shaft. Even if the outer mechanical seal 163 leaks and the contaminated medium enters the oil cavity between the bearing housing 150 and the mechanical seal cover 120 along the motor main shaft, the inner mechanical seal 162 will continue to provide sealing protection;

[0042] 2. At the same time, a humidity detector can be provided in the oil cavity between the bearing housing 150 and the mechanical seal cover 120. If the outer mechanical seal 163 leaks, the humidity detector can detect and alarm;

[0043] 3. If both the inner mechanical seal 162 and the outer mechanical seal 163 are damaged, the skeleton oil seal 161 will continue to protect the motor 140 as another sealing line of defense; at the same time, the contaminated medium will flow along the motor main shaft and along the flow channel 150b into the float switch cavity 150a, and the float switch 170 will alarm after detection.

[0044] Figure 5 As shown; in this embodiment, an oil drain hole 150c is provided in the radial direction of the bearing housing 150, one end of the oil drain hole 150c is connected to the float switch chamber 150a, and the other end of the oil drain hole 150c extends to the outside of the bearing housing 150; a sealing plug 150d is inserted in the oil drain hole 150c.

[0045] The float switch 170 detects that the mechanical seal is damaged. At this time, there is no need to disassemble the impeller or the entire machine. The sealing plug 150d in the oil drain hole 150c can be pulled out to discharge the liquid medium. At the same time, the fault can be eliminated according to the discharge amount of the liquid medium. If it is analyzed that it is only normal micro-seepage due to long-term operation, the machine can continue to be used after the liquid medium in the float switch chamber 150a is discharged. There is no need to disassemble the impeller and the external machine seal and its casing, which can reduce the maintenance workload and reduce the maintenance cost.

[0046] In this embodiment, the bearing housing 150 is disc-shaped, and the front end bearing 151 is fixed at the center of the bearing housing 150; a plurality of spaced-apart weight-reducing grooves 152 are respectively provided on the two side walls of the bearing housing 150; the weight-reducing grooves 152 are provided on the bearing housing 150 to reduce the weight of the bearing housing 150 and reduce the production cost.

[0047] An agitator capable of detecting leakage of an inner mechanical seal provided by an embodiment of the utility model has the following beneficial effects: The utility model designs an agitator capable of detecting leakage of an inner mechanical seal, and can effectively detect whether the inner mechanical seal of the agitator is damaged.

[0048] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0049] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0050] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of the utility model, and all these changes or substitutions should fall within the protection scope of the claims attached to the utility model.

Claims

1. A stirrer capable of detecting leakage of an inner mechanical seal, characterized in that: include: Casing, motor, impeller, bearing housing, front end bearing, skeleton oil seal, inner mechanical seal, outer mechanical seal and float switch; The casing includes a spliced ​​motor casing and a machine seal cover casing; The motor is arranged inside the motor housing, and the motor main shaft passes through the machine seal housing and extends to the outside of the machine seal housing; The impeller is fixedly connected to the end of the motor main shaft; The bearing housing is arranged inside the casing and between the motor casing and the machine seal cover casing. A front end bearing is arranged on the bearing housing, and the motor main shaft is rotatably connected with the front end bearing. The skeleton oil seal, the inner mechanical seal and the outer mechanical seal are arranged on the main shaft of the motor in sequence, and the skeleton oil seal is located at the front side of the bearing housing, the inner mechanical seal is located at the rear side of the bearing housing, and the outer mechanical seal is located at the outer side of the mechanical seal cover; A float switch cavity is arranged on the side wall of the bearing housing, a flow channel is arranged in the radial direction of the bearing housing, one end of the flow channel extends to the outer side of the front bearing, and the other end of the flow channel is connected to the float switch cavity, and a float switch is arranged in the float switch cavity.

2. The agitator capable of detecting inner mechanical seal leakage according to claim 1, characterized in that: An oil drain hole is provided in the radial direction of the bearing housing, one end of the oil drain hole is communicated with the float switch cavity, and the other end of the oil drain hole extends to the outside of the bearing housing; a sealing plug is inserted in the oil drain hole.

3. The agitator capable of detecting inner mechanical seal leakage according to claim 1, characterized in that: The bearing housing is disc-shaped, and the front end bearing is fixed at the center of the bearing housing.

4. The agitator capable of detecting inner mechanical seal leakage according to claim 1, characterized in that: A plurality of weight-reducing grooves arranged at intervals are respectively arranged on the two side walls of the bearing housing.

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