A self-cooling water pump with mechanical shaft seal

Abstract

The present invention relates to a mechanical shaft seal self-cooling water pump, comprising a motor, a mounting seat, a cooling box, a front cover, a sealing member, a front shaft seal, an impeller and a main body; the cooling box is connected to the motor through the mounting seat, the cooling box is communicated with the front cover pipeline, the front cover is connected to the rear cover through the middle cover, the middle cover is provided with a shaft seal fixing ring, the sealing member is connected to the middle cover through the shaft seal fixing ring, the motor is provided with a rotating shaft, the front shaft seal is connected to the middle cover through the shaft seal fixing ring, the main body and the impeller are connected to the mounting seat through the rear cover, the rotating shaft passes through the front cover, the middle cover, the sealing member and the front shaft seal, and the cooling box, the front cover, the middle cover, the shaft seal fixing ring, the sealing member and the front shaft seal form a cooling system for the shaft seal system. The present invention provides a mechanical shaft seal self-cooling water pump, which ensures that the mechanical shaft seal will not idle due to lack of water, avoids overheating of the mechanical shaft seal, and prolongs the service life of the pump.

Description

Technical Field

[0001] The invention relates to the field of pumps, and in particular to a mechanical shaft seal self-cooling water pump. Background Art

[0002] A pump is a machine that transports fluid or pressurizes fluid; it transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid.

[0003] During long-term use of the pump, the liquid in the pump may be cut off, causing the shaft seal to run idle and be damaged. Now there is an urgent need for a pump that can self-cool the mechanical shaft seal during the operation of the pump to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to provide a mechanical shaft seal self-cooling water pump to solve the above problems.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A mechanical shaft seal and self-cooling water pump, comprising a motor, a mounting seat, a cooling box, a front cover, a sealing member, a front shaft seal, an impeller and a main body; the cooling box is connected to the motor through the mounting seat, the cooling box is communicated with the front cover pipeline, the front cover is connected to the rear cover through the middle cover, the middle cover is provided with a shaft seal fixing ring, the sealing member is connected to the middle cover through the shaft seal fixing ring, the motor is provided with a rotating shaft, the front shaft seal is connected to the middle cover through the shaft seal fixing ring, the main body and the impeller are connected to the mounting seat through the rear cover, the rotating shaft passes through the front cover, the middle cover, the sealing member and the front shaft seal, and the cooling box, the front cover, the middle cover, the shaft seal fixing ring, the sealing member and the front shaft seal form a cooling system for the shaft seal system.

[0007] Furthermore, the cooling box is provided with a liquid outlet and a liquid inlet, the front cover is provided with a left port and a right port, the middle cover is provided with a water inlet hole, and the sealing member corresponds to the position of the shaft seal fixing ring.

[0008] Furthermore, the liquid inlet is located on the cooling box near the mounting seat, and the liquid outlet is located on the cooling box away from the mounting seat. The liquid outlet and the liquid inlet are respectively connected to the left and right pipes, and the left and right ports are connected to the shaft seal fixing ring through the water inlet hole, and an extension portion is provided on the seal.

[0009] Furthermore, the liquid outlet is located above the liquid inlet, the shaft seal fixing ring is provided with an annular groove, a water channel, a positioning hole and a rear groove, the extension portion is specifically located in the annular groove, and the left and right ports are both connected to the annular groove through the water inlet hole.

[0010] Furthermore, the annular groove is connected to the rear groove through a water channel, the two protruding parts are both located in the annular groove away from the water channel, and the positioning hole corresponds to the position of the protruding block of the front cover.

[0011] Furthermore, there are two water channels, which are connected to the front groove on the front shaft seal through the rear groove. A protrusion is arranged in the rear groove, and the size of the rear groove matches that of the front groove.

[0012] Furthermore, the protrusion is located in the rear groove away from the water channel, and a stopper is provided in the front groove, and the height of the stopper corresponds to the depth of the front groove. The front groove is connected to the cooling box through the rear groove, the water channel, the annular groove, the water inlet, the left and right ports, and the liquid outlet and the liquid inlet.

[0013] Furthermore, the rotating shaft is fixedly connected to the impeller, the rotating shaft is separated from the front cover, the shaft seal fixing ring and the sealing member, and the front shaft seal is connected to the impeller and the rotating shaft.

[0014] The beneficial effects of the present invention are: providing a water pump with a self-cooling mechanical shaft seal, through the coordinated use of a motor, a mounting base, a cooling box, a front cover, a seal, a front shaft seal and a main body, to achieve the effect of cooling the mechanical shaft seal on the pump during the use of the pump, to ensure that the mechanical shaft seal will not idle due to lack of water, to avoid overheating of the mechanical shaft seal, and to extend the service life of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an exploded view of the overall structure of a mechanical shaft seal self-cooling water pump according to the present invention.

[0016] Figure 2 This is another overall structural explosion diagram of a mechanical shaft seal self-cooling water pump of the present invention.

[0017] Figure 3 This is a partial structural exploded view of a mechanical shaft seal self-cooling water pump according to the present invention.

[0018] Figure 4 This is an exploded view of another part of the structure of a mechanical shaft seal self-cooling water pump according to the present invention.

[0019] Figure 5 This is a partial structural axonometric diagram of a mechanical shaft seal self-cooling water pump according to the present invention.

[0020] Figure 6 The present invention is a partial structural front view of a mechanical shaft seal self-cooling water pump.

[0021] Figure 7 This is a front view of another part of the structure of a mechanical shaft seal self-cooling water pump of the present invention.

[0022] Figure 8This is a front view of another part of the structure of a mechanical shaft seal self-cooling water pump of the present invention.

[0023] In the figure: 1. motor; 2. mounting base; 3. cooling box; 31. liquid outlet; 32. liquid inlet; 4. front cover; 41. left outlet; 42. right outlet; 5. middle cover; 51. water inlet; 6. shaft seal fixing ring; 61. ring groove; 62. water channel; 63. positioning hole; 64. rear groove; 65. bump; 7. sealing member; 71. extension; 8. rotating shaft; 9. front shaft seal; 91. front groove; 92. stop member; 10. main body; 11. rear cover. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] refer to Figures 1 to 8 A mechanical shaft seal self-cooling water pump comprises a motor 1, a mounting seat 2, a cooling box 3, a front cover 4, a sealing member 7, a front shaft seal 9, an impeller 12 and a main body 10; the cooling box 3 is connected to the mounting seat 2 Connected to the motor 1, the cooling box 3 is connected to the front cover 4 through a pipeline for discharging and receiving coolant, the front cover 4 is connected to the rear cover 11 through the middle cover 5, a shaft seal fixing ring 6 is provided on the middle cover 5, the seal 7 is connected to the middle cover 5 through the shaft seal fixing ring 6, the seal 7 is used to cooperate with the annular groove 61 to form an annular space, and the annular groove 61 is divided into two areas, a rotating shaft 8 is provided on the motor 1 for driving the impeller 12 to work, the front shaft seal 9 is connected to the middle cover 5 through the shaft seal fixing ring 6, the main body 10 and the impeller 12 are connected to the mounting seat 2 through the rear cover 11, the rotating shaft 8 passes through the front cover 4, the middle cover 5, the seal 7 and the front shaft seal 9, the cooling box 3, the front cover 4, the middle cover 5, the shaft seal fixing ring 6, the seal 7 and the front shaft seal 9 constitute a cooling system for the shaft seal system, which is used to cool the shaft seal system.

[0026] The cooling box 3 is provided with a liquid outlet 31 and a liquid inlet 32, the front cover 4 is provided with a left port 41 and a right port 42, the middle cover 5 is provided with a water inlet 51, and the sealing member 7 corresponds to the position of the shaft seal fixing ring 6, and is used to cooperate with the annular groove 61 to form an annular space and divide the annular groove 61 into two areas.

[0027] The liquid inlet 32 ​​is located on the cooling box 3 near the mounting seat 2, and is used to ensure that the coolant can enter the left port 41 through the pipeline under the action of gravity. The liquid outlet 31 is located on the cooling box 3 away from the mounting seat 2. The liquid outlet 31 and the liquid inlet 32 ​​are connected with the left port 41 and the right port 42 pipelines respectively. The left port 41 and the right port 42 are connected with the shaft seal fixing ring 6 through the water inlet hole 51. The sealing member 7 is provided with a protruding portion 71, which is used to divide the annular groove 61 into two areas.

[0028] The liquid outlet 31 is located above the liquid inlet 32 ​​, the shaft seal fixing ring 6 is provided with an annular groove 61 , a water channel 62 , a positioning hole 63 and a rear groove 64 , the extension portion 71 is specifically located in the annular groove 61 , and the left port 41 and the right port 42 are both connected to the annular groove 61 through the water inlet hole 51 .

[0029] The annular groove 61 is connected to the rear groove 64 through the water channel 62 , and the two protruding portions 71 are both located in the annular groove 61 away from the water channel 62 . The positioning hole 63 corresponds to the position of the protruding block of the front cover 4 and is used to position the front cover 4 .

[0030] Specifically, there are two water channels 62, which are used to respectively supply and discharge liquid into and out of the space formed by the rear groove 64 and the front groove 91. The water channel 62 is connected with the front groove 91 on the front shaft seal 9 through the rear groove 64. A protrusion 65 is provided in the rear groove 64, and the size of the rear groove 64 matches that of the front groove 91.

[0031] The protrusion 65 is located in the rear groove 64 away from the water channel 62, and a stopper 92 is provided in the front groove 91. The height of the stopper 92 corresponds to the depth of the front groove 91. The front groove 91 is connected to the cooling box 3 through the rear groove 64, the water channel 62, the annular groove 61, the water inlet hole 51, the left port 41 and the right port 42, and the liquid outlet 31 and the liquid inlet 32 ​​to form a circulating cooling system.

[0032] The rotating shaft 8 is connected to the impeller 12 for driving the impeller 12 to work. The rotating shaft 8 is separated from the front cover 4, the shaft seal fixing ring 6 and the seal 7. The front shaft seal 9 is connected to the impeller 12 and the rotating shaft 8 for driving the front shaft seal 9 to rotate.

[0033] The working principle of the present invention is as follows: when the pump works normally: the motor 1 works to drive the impeller 12 to start working. During this process, the cooling liquid in the cooling box 3 enters the annular groove 61 on the shaft seal fixing ring 6 through the liquid inlet 32, the left port 41 and the water inlet hole 51 on the middle cover 5. Since the extension 71 on the sealing member 7 is inserted into the annular groove 61, the annular groove 61 is divided into two areas. The cooling liquid enters one of the areas in the annular groove 61, and then the cooling liquid enters the space formed by the rear groove 64 and the front groove 91 through a water channel 62 thereon. Driven by the rotating shaft of the motor 1 and the impeller 12, the front shaft seal 9 rotates continuously during this process. The coolant in the front groove 91 of the front shaft seal 9 enters another area of ​​the annular groove 61 through another water channel 62 on the shaft seal fixing ring 6. The coolant in the other area after cooling the shaft seal returns to the cooling box 3 through another water inlet hole 51, the right port 42 and the liquid outlet 31 in the annular groove 61. In this process, the liquid coolant in the cooling box 3 enters one of the areas composed of the annular groove 61 and the sealing element 7 through the liquid inlet 32, the left port 41 and the water inlet hole 51, and then enters the area composed of the rear groove 64 and the front groove 91 through one of the water channels 62. Then, as the front shaft seal 9 rotates, the coolant in the front shaft seal 9 The liquid in the shaft seal is cooled, and then when the coolant in the front shaft seal 9 contacts another water channel 62 on the rear groove 64, the coolant returns to another area composed of the annular groove 61 and the seal 7 through another water channel 62 under the action of the protrusion 65 in the rear groove 64 and the blocking member 92 in the front groove 91, and finally returns to the cooling box 3 through the right port 42 and the liquid outlet 31 in the other area; thus, a cooling circulation system is formed, and the above process is repeated until the work is completed.

[0034] The above embodiments are used to further illustrate the present invention, but the present invention is not limited to these specific embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be understood to be within the protection scope of the present invention.

Claims

1. A mechanical shaft seal self-cooling water pump, characterized in that: The invention comprises a motor (1), a mounting seat (2), a cooling box (3), a front cover (4), a sealing member (7), a front shaft seal (9), an impeller (12) and a main body (10); the cooling box (3) is connected to the motor (1) via the mounting seat (2); the cooling box (3) is connected to the front cover (4) via a pipeline; the front cover (4) is connected to the rear cover (11) via a middle cover (5); a shaft seal fixing ring (6) is provided on the middle cover (5); the sealing member (7) is connected to the middle cover (5) via the shaft seal fixing ring (6); The motor (1) is provided with a rotating shaft (8); the front shaft seal (9) is connected to the middle cover (5) via a shaft seal fixing ring (6); the main body (10) and the impeller (12) are connected to the mounting seat (2) via a rear cover (11); the rotating shaft (8) passes through the front cover (4), the middle cover (5), the sealing member (7) and the front shaft seal (9); and the cooling box (3), the front cover (4), the middle cover (5), the shaft seal fixing ring (6), the sealing member (7) and the front shaft seal (9) constitute a cooling system for the shaft seal system; The cooling box (3) is provided with a liquid outlet (31) and a liquid inlet (32), the front cover (4) is provided with a left port (41) and a right port (42), the middle cover (5) is provided with a water inlet hole (51), and the sealing member (7) corresponds to the position of the shaft seal fixing ring (6); The liquid inlet (32) is located on the cooling box (3) near the mounting seat (2), the liquid outlet (31) is located on the cooling box (3) away from the mounting seat (2), the liquid outlet (31) is in communication with a right port (42) pipeline, the liquid inlet (32) is in communication with a left port (41) pipeline, the left port (41) and the right port (42) are in communication with a shaft seal fixing ring (6) via a water inlet hole (51), and the sealing member (7) is provided with a protruding portion (71); The liquid outlet (31) is located above the liquid inlet (32); the shaft seal fixing ring (6) is provided with an annular groove (61), a water channel (62), a positioning hole (63) and a rear groove (64); the protruding portion (71) is specifically located in the annular groove (61); the left port (41) and the right port (42) are both connected to the annular groove (61) through the water inlet hole (51); The annular groove (61) is connected to the rear groove (64) via the water channel (62), the two protruding portions (71) are both located in the annular groove (61) away from the water channel (62), and the positioning hole (63) corresponds to the position of the protruding block of the front cover (4); Specifically, there are two water channels (62), and the water channels (62) are connected to the front groove (91) on the front shaft seal (9) through the rear groove (64). A protrusion (65) is provided in the rear groove (64). The size of the rear groove (64) matches that of the front groove (91). The protrusion (65) is located in the rear groove (64) away from the water channel (62), a stopper (92) is provided in the front groove (91), the height of the stopper (92) corresponds to the depth of the front groove (91), and the front groove (91) is connected to the cooling box (3) through the rear groove (64), the water channel (62), the annular groove (61), the water inlet hole (51), the left port (41) and the right port (42), as well as the liquid outlet (31) and the liquid inlet (32).

2. A mechanical shaft seal self-cooling water pump according to claim 1, characterized in that: The rotating shaft (8) is fixedly connected to the impeller (12), the rotating shaft (8) is separated from the front cover (4), the shaft seal fixing ring (6) and the sealing member (7), and the front shaft seal (9) is connected to the impeller (12) and the rotating shaft (8).

Images