Cooling structure of centrifugal water pump shaft seal

Abstract

The utility model discloses a cooling structure of a centrifugal water pump shaft seal, which belongs to the technical field of centrifugal water pumps and comprises a driving motor, a driving rod is fixedly mounted at the transmission end of the driving motor, a pump body is arranged on the right side of the driving motor, and a supporting seat is fixedly mounted at the lower ends of the driving motor and the pump body. The centrifugal water pump shaft seal cooling structure comprises a pump body, a driving motor is arranged on the pump body, an air inducing mechanism and an air making mechanism are arranged between the driving motor and the pump body, a flow guide ring is fixedly installed on an installation frame, and a transmission ring and a flow guide fan body are arranged on the inner side of the flow guide ring. The air making mechanism basically achieves the zero-energy-consumption heat dissipation and cooling effect by means of transmission force of a driving motor and a driving rod in the centrifugal water pump, the air making mechanism guides flow and circulates into air inducing grooves in a second air inducing plate in the air inducing mechanism, air enters the multiple sets of air inducing grooves at the same time, airflow in the air inducing grooves is accelerated, heat is taken away, then the sealing ring is rapidly cooled, and the service life of the sealing ring is prolonged. And the shaft seal body on the inner side of the sealing ring is quickly cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal water pumps, in particular to a cooling structure for a shaft seal of a centrifugal water pump. Background Art

[0002] A centrifugal water pump is a pump that uses centrifugal force and pressure difference to discharge liquid from the center of the pump shaft and transport it to a higher place. It is mainly composed of a pump casing, impeller, pump shaft and seals. The pump casing is usually cylindrical, and its interior is a fixed enclosed space called a pump chamber. When the liquid is sucked into the pump casing by the impeller, the impeller rotates at high speed, causing the liquid to move outward under the action of centrifugal force. At the same time, the liquid leaving the impeller will flow out through the pump outlet pipe. At the pump outlet, the liquid is transported to the required height through a pipeline. The impeller is the core component of the centrifugal water pump. It is fixed on the pump shaft and is sucked into the pump chamber in the pump casing through the liquid. The shape and size of the impeller directly determine the flow rate, pressure and speed of the liquid. The impeller is usually made of stainless steel or other corrosion-resistant materials to adapt to different types and concentrations of liquids. The pump shaft is an important component connecting the impeller and the motor, which supports the rotation of the impeller.

[0003] Patent document with application number CN201520030476.X discloses a centrifugal water pump, which includes a motor, a pump body and a connecting seat. The motor and the outer end of the pump body are fixedly connected, the inner end of the pump body is fixedly connected to the connecting seat, and a water pump chamber is formed between the inner end of the pump body and the annular surface of the connecting seat. The output shaft of the motor passes through the pump body and is fixedly connected to an impeller located in the water pump chamber. A sheet-shaped and annular stainless steel sheet 1 is fixedly connected to the inner end of the pump body, and a sheet-shaped and annular stainless steel sheet 2 is fixedly connected to the annular surface of the connecting seat. The impeller includes a stainless steel sheet 1 fixedly connected to the inner end of the pump body, and a stainless steel sheet 2 fixedly connected to the annular surface of the connecting seat. The impeller includes a stainless steel sheet 1 fixedly connected to the inner end of the pump body, and a stainless steel sheet 2 fixedly connected to the annular surface of the connecting seat. There are a plurality of stainless steel blades evenly fixedly connected between the stainless steel sheet three and the stainless steel sheet four opposite to the stainless steel sheet two in the circumferential direction; based on the search of the above patents and in combination with the cooling structure of the centrifugal water pump shaft seal in the prior art, it is found that the existing cooling structures for the centrifugal water pump shaft seal cool the shaft seal by increasing liquid cooling and installing liquid pipes in the groove, which requires the use of additional pump bodies and liquids, greatly increasing the use cost of the centrifugal water pump, and there is also the risk of leakage when using the liquid injection method. Utility Model Content

[0004] The utility model aims to provide a cooling structure for a centrifugal water pump shaft seal to solve the problems raised in the above background technology.

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

[0006] A cooling structure for a centrifugal water pump shaft seal comprises a drive motor, a drive rod is fixedly mounted on the transmission end of the drive motor, a pump body is arranged on the right side of the drive motor, a support seat is fixedly mounted on the lower ends of the drive motor and the pump body, an air induction mechanism and an air control mechanism are arranged between the drive motor and the pump body, the air control mechanism comprises a mounting frame, a guide ring, a transmission ring and a guide fan body, a guide ring is fixedly mounted on the mounting frame, a transmission ring and a guide fan body are arranged on the inner side of the guide ring, the transmission ring is fixedly mounted on the drive rod, and the guide fan body is fixedly mounted on the outer wall of the transmission ring.

[0007] Optionally, the wind control mechanism further includes a first mesh plate, a second mesh plate and a wind shield plate, and the first mesh plate is fixedly mounted on the left end of the guide ring.

[0008] Optionally, a second mesh plate is fixedly mounted on the right end of the guide ring, and a wind shield plate is fixedly mounted on the inner wall of the second mesh plate.

[0009] Optionally, the air induction mechanism includes a sealing ring, an air induction groove, a first air induction plate, a fixing nut, a mounting ring, a mounting seat and a second air induction plate, and a shaft sealing body is arranged on the outer side of the driving rod.

[0010] Optionally, a sealing ring is provided on the outer side of the shaft sealing body, and an air induction groove is provided on the outer wall of the sealing ring.

[0011] Optionally, a first air induction plate is fixedly mounted on the left end of the sealing ring, a fixing nut is threadedly connected to the outer side of the sealing ring, and a mounting ring is fixedly mounted on the left end of the fixing nut.

[0012] Optionally, the outer side of the mounting ring is threadedly connected to a mounting seat, and a second air induction plate is fixedly mounted on the left end of the mounting seat.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the utility model, an induced draft mechanism and an air control mechanism are provided. The working principle of the induced draft mechanism and the air control mechanism is based on the drive of a centrifugal water pump, and no additional electric energy consumption is required, which not only reduces the operating cost but also conforms to the concept of environmental protection. The air control mechanism guides the air and circulates it into the induced draft groove through the second induced draft plate in the induced draft mechanism. Air enters into multiple groups of induced draft grooves at the same time, which speeds up the air flow in the induced draft grooves and takes away the heat, thereby quickly cooling the sealing ring and quickly cooling the shaft seal body inside the sealing ring, which greatly improves the cooling efficiency, reduces the working temperature of the shaft seal, and prolongs its service life. Since the cooling process does not require The extra electricity consumption can greatly reduce the operating cost of the centrifugal water pump in the long run. Specifically, the main function of the induced draft mechanism is to guide the airflow and guide the rapid airflow generated by the wind-making mechanism into the induced draft groove to take away the heat. The wind-making mechanism is the key to achieving the generation of rapid airflow. The mechanism includes a mounting frame, a guide ring, a first mesh plate, a transmission ring and a guide fan body. When the driving motor drives the driving rod to rotate, the transmission ring and the guide fan body will rotate rapidly to generate rapid airflow, which is gradually accelerated and guided into the induced draft groove, thereby achieving rapid cooling of the shaft seal body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model in a three-dimensional front view;

[0016] Figure 2 It is a schematic structural diagram of the utility model in a plane front view;

[0017] Figure 3 It is a schematic diagram of the structure of the utility model from a plan view;

[0018] Figure 4 The structure of the utility model is schematically shown in a three-dimensional cutaway view. Figure 1 ;

[0019] Figure 5 It is a schematic diagram of the structure of the utility model in a three-dimensional top view;

[0020] Figure 6 The structure of the utility model is shown in a three-dimensional cutaway view. Figure 2 ;

[0021] Figure 7 The structure of the utility model is shown in a three-dimensional cutaway view. Figure 3 ;

[0022] Figure 8 For this utility model Figure 6 Schematic diagram of the three-dimensional enlarged structure at point A in the middle.

[0023] In the figure: 1. driving motor; 2. driving rod; 3. pump body; 4. supporting seat; 5. air induction mechanism; 501. sealing ring; 502. air induction groove; 503. first air induction plate; 504. fixing nut; 505. mounting ring; 506. mounting seat; 507. second air induction plate; 6. air control mechanism; 601. mounting frame; 602. guide ring; 603. first mesh plate; 604. transmission ring; 605. guide fan body; 606. second mesh plate; 607. wind shield plate; 7. shaft sealing body. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figures 1 to 8 In the embodiment of the utility model, a cooling structure of a centrifugal water pump shaft seal includes a driving motor 1, a driving rod 2 is fixedly installed on the driving end of the driving motor 1, a pump body 3 is arranged on the right side of the driving motor 1, a support seat 4 is fixedly installed on the lower ends of the driving motor 1 and the pump body 3, an air induction mechanism 5 and an air control mechanism 6 are arranged between the driving motor 1 and the pump body 3, and the air control mechanism 6 includes a mounting frame 601, a guide ring 602, a transmission ring 604 and a guide fan body 605, a guide ring 602 is fixedly installed on the mounting frame 601, a transmission ring 604 and a guide fan body 605 are arranged on the inner side of the guide ring 602, and the transmission ring 604 It is fixedly mounted on the driving rod 2, and a guide fan body 605 is fixedly mounted on the outer wall of the transmission ring 604. The wind control mechanism 6 also includes a first mesh plate 603, a second mesh plate 606 and a wind shield plate 607. The first mesh plate 603 is fixedly mounted on the left end of the guide ring 602, the second mesh plate 606 is fixedly mounted on the right end of the guide ring 602, and the wind shield plate 607 is fixedly mounted on the inner wall of the second mesh plate 606; the guide ring 602 guides the fast airflow so that it can be evenly distributed and enter the air guide groove 502, and the first mesh plate 603 and the second mesh plate 606 play a filtering role to prevent foreign matter from entering the cooling system and ensure its normal operation;

[0026] The air induction mechanism 5 includes a sealing ring 501, an air induction groove 502, a first air induction plate 503, a fixing nut 504, a mounting ring 505, a mounting seat 506 and a second air induction plate 507. A shaft sealing body 7 is arranged on the outside of the driving rod 2. A sealing ring 501 is arranged on the outside of the shaft sealing body 7. An air induction groove 502 is provided on the outer wall of the sealing ring 501. The first air induction plate 503 is fixedly installed on the left end of the sealing ring 501. A fixing nut 504 is threadedly connected to the outer side of the sealing ring 501. A mounting ring 505 is fixedly installed on the left end of the fixing nut 504. The outer side is threadedly connected with a mounting seat 506, and a second air induction plate 507 is fixedly installed at the left end of the mounting seat 506; the air induction groove 502 accommodates the air so that the air flow can pass smoothly and take away the heat, and the sealing ring 501 plays a shielding role to ensure the sealing performance of the shaft seal, and the wind control mechanism 6 guides the air and circulates it to the air induction groove 502 through the second air induction plate 507 in the air induction mechanism 5, and air enters multiple groups of air induction grooves 502 at the same time, which speeds up the air flow in the air induction grooves 502 and takes away the heat, thereby quickly cooling the sealing ring 501 and quickly cooling the shaft seal body 7 inside the sealing ring 501.

[0027] The working principle of the utility model is as follows: the cooling structure of the centrifugal water pump shaft seal is additionally provided with an induced draft mechanism 5 and an air control mechanism 6. When using the induced draft mechanism 5 and the air control mechanism 6, there is no need to perform operations such as connecting electricity. The induced draft mechanism 5 and the air control mechanism 6 only need to be installed on the centrifugal water pump, and the air control mechanism 6 is installed on the driving rod 2, and the induced draft mechanism 5 is installed on the outside of the shaft seal body 7. The induced draft mechanism 5 and the air control mechanism 6 are activated along with the start of the centrifugal water pump, and no standby energy consumption and other additional energy consumption are generated. Only the transmission force of the driving rod 2 in the centrifugal water pump needs to be used to start the driving motor 1 to drive the driving rod 2 to rotate, and the driving rod 2 further drives the transmission ring 604 and the guide fan body 605 to rotate rapidly, blowing air to the right, forming a rapid airflow. The airflow is in the first Under the guidance, the second air induced plate 507 will pour into the air induced groove 502, take away the heat in the air induced groove 502 (that is, the heat on the sealing ring 501), achieve a cooling effect with basically zero energy consumption, and finally discharge it to the left side through the air induced groove 502; in summary, the air induced mechanism 5 and the air control mechanism 6 complement each other, and the air control mechanism 6 basically achieves a zero-energy heat dissipation cooling effect with the help of the transmission force of the driving motor 1 and the driving rod 2 in the centrifugal water pump. The air control mechanism 6 guides the air and circulates it to the air induced groove 502 through the second air induced plate 507 in the air induced mechanism 5, and multiple groups of air induced grooves 502 are simultaneously introduced, which accelerates the airflow in the air induced groove 502, takes away the heat, and then makes the sealing ring 501 cool down quickly, so that the shaft sealing body 7 on the inner side of the sealing ring 501 is cooled quickly.

[0028] 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 cooling structure for a centrifugal water pump shaft seal, comprising a drive motor (1), a drive rod (2) being fixedly mounted on a transmission end of the drive motor (1), a pump body (3) being arranged on the right side of the drive motor (1), and a support seat (4) being fixedly mounted on the lower ends of the drive motor (1) and the pump body (3), characterized in that: An air induction mechanism (5) and an air control mechanism (6) are arranged between the driving motor (1) and the pump body (3); the air control mechanism (6) comprises a mounting frame (601), a guide ring (602), a transmission ring (604) and a guide fan body (605); the guide ring (602) is fixedly mounted on the mounting frame (601); the transmission ring (604) and the guide fan body (605) are arranged on the inner side of the guide ring (602); the transmission ring (604) is fixedly mounted on the driving rod (2); and the guide fan body (605) is fixedly mounted on the outer wall of the transmission ring (604).

2. The cooling structure of a centrifugal water pump shaft seal according to claim 1, characterized in that: The wind control mechanism (6) further comprises a first mesh plate (603), a second mesh plate (606) and a wind shield plate (607), and the first mesh plate (603) is fixedly mounted on the left end of the guide ring (602).

3. The cooling structure of a centrifugal water pump shaft seal according to claim 2, characterized in that: A second mesh plate (606) is fixedly mounted on the right end of the guide ring (602), and a windshield plate (607) is fixedly mounted on the inner wall of the second mesh plate (606).

4. The cooling structure of a centrifugal water pump shaft seal according to claim 1, characterized in that: The air induction mechanism (5) comprises a sealing ring (501), an air induction groove (502), a first air induction plate (503), a fixing nut (504), a mounting ring (505), a mounting seat (506) and a second air induction plate (507), and a shaft sealing body (7) is arranged on the outer side of the driving rod (2).

5. The cooling structure of a centrifugal water pump shaft seal according to claim 4, characterized in that: A sealing ring (501) is arranged on the outer side of the shaft sealing body (7), and an air induction groove (502) is provided on the outer wall of the sealing ring (501).

6. The cooling structure of a centrifugal water pump shaft seal according to claim 5, characterized in that: A first air induction plate (503) is fixedly mounted on the left end of the sealing ring (501), a fixing nut (504) is threadedly connected to the outer side of the sealing ring (501), and a mounting ring (505) is fixedly mounted on the left end of the fixing nut (504).

7. The cooling structure of a centrifugal water pump shaft seal according to claim 6, characterized in that: The outer side of the mounting ring (505) is threadedly connected to a mounting seat (506), and a second air induction plate (507) is fixedly mounted on the left end of the mounting seat (506).

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