OH2 type pump with special water cooling cavity sleeve

Abstract

The utility model discloses an OH2 type pump with a special water cooling cavity sleeve, which comprises a pump body, a pump cover and a pump head are connected onto the pump body, an impeller shaft is rotatably supported in the pump body, an impeller is arranged at one end of the impeller shaft and positioned in the pump head, and the other end of the impeller shaft is connected with an output end of a bearing box. The pump body is internally provided with a bearing box, the input end of the bearing box is connected with a working shaft of the motor, the pump body is internally provided with a cartridge seal, the cartridge seal is provided with a front moving ring and a rear moving ring, and the cartridge seal is provided with a first liquid inlet and a first liquid outlet; a first liquid inlet and a first liquid outlet are formed in the pump head, the first liquid inlet and the first liquid outlet are both communicated with a rear cavity where the rear moving ring is located, a second liquid inlet is further formed in the cartridge seal and communicated with a front cavity where the front moving ring is located, and the front cavity is communicated with an inner cavity of the pump head through a gap between the impeller shaft and the pump cover.

Description

Technical Field

[0001] The utility model relates to the field of water pumps, in particular to an OH2 type pump with a special water cooling cavity sleeve. Background Art

[0002] OH2 horizontal cantilever pump is an end-in, top-out, single-stage radially split, centerline supported process pump suitable for conveying clean or slightly contaminated, chemically neutral or corrosive, low-temperature or high-temperature media. The bearing box of OH2 pump has the functions of balancing stress, heat dissipation, lubrication, and reducing operating costs. In the existing product designs on the market, most OH2 pumps have longer shafts and bearing boxes, which means that the pump has a larger load during operation. This structure often causes greater vibration; in addition, when flushing the cartridge seal of the existing bearing box, it is often impossible to directly flush the highest temperature moving ring part. The cooling water only circulates in the water cooling jacket and takes away the heat. The water used for cooling will not contact the moving ring part, and the water cooling jacket will not contact the moving ring part. It belongs to indirect cooling. This cooling method is very inefficient and has poor cooling effect, so it will affect the sealing effect and service life of the cartridge seal.

[0003] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0004] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes an OH2 type pump with a special water-cooling cavity sleeve which has a simple structure, ingenious design, reasonable layout and can effectively improve the sealing effect and service life of the container seal.

[0005] The technical solution of the utility model is: an OH2 type pump with a special water-cooling cavity sleeve, including a pump body 1, a pump cover 2 and a pump head 3 are connected to the pump body 1, an impeller shaft 4 is rotatably supported in the pump body 1, an impeller 5 is arranged at one end of the impeller shaft 4, and the impeller 5 is located in the pump head 3, the other end of the impeller shaft 4 is connected to the output end of the bearing box, and the input end of the bearing box is connected to the working shaft of the motor, and the characteristics are: a cartridge seal 6 is arranged in the pump body 1, and the cartridge seal 6 is arranged in the pump body 1. A front moving ring 7 and a rear moving ring 8 are provided on the cartridge seal 6, a first liquid inlet 9 and a first liquid outlet 10 are provided on the cartridge seal 6, the first liquid inlet 9 and the first liquid outlet 10 are both connected to a rear chamber 11 where the rear moving ring 8 is located, a second liquid inlet 12 is also provided on the cartridge seal 6, the second liquid inlet 12 is connected to a front chamber 13 where the front moving ring 7 is located, and the front chamber 13 is connected to the inner cavity of the pump head 3 through the gap between the impeller shaft 4 and the pump cover 2.

[0006] The ends of the first liquid inlet 9 and the first liquid outlet 10 are both connected with pipelines, and the end of the second liquid inlet 12 is also connected with a pipeline, and the pipeline is connected to a cooling pump in a cooling water circulation system.

[0007] An annular cooling cavity 14 is provided in the pump cover 2 , and an annular plate 15 is provided to match the opening of the cooling cavity 14 . Sealing rings 16 are provided on the outer wall and the inner wall of the annular plate 15 .

[0008] Compared with the prior art, the utility model has the following advantages:

[0009] This type of OH2 pump with a special water-cooling chamber sleeve has a simple structure, ingenious design, and reasonable layout. It is designed to solve the problems of the pump body with a traditional water-cooling chamber structure. It directly opens a hole on the integrated seal to introduce cooling water into the chambers where the front and rear moving rings are located. The chamber of the rear moving ring is directly cooled by circulating water under the action of the cooling water circulation system, and the cooling water flowing through the front moving ring directly enters the pump head. This structure allows the moving ring to be directly cooled, and the cooling efficiency is greatly improved compared with the indirect cooling method in the traditional structure. In addition, the manufacturing process of this pump is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0011] Figure 2 It is a partial enlarged view of an embodiment of the utility model. DETAILED DESCRIPTION

[0012] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figure 1 , Figure 2 As shown: an OH2 type pump with a special water-cooled cavity sleeve, comprising a pump body 1, a pump cover 2 and a pump head 3 are connected to the pump body 1, an impeller shaft 4 is rotatably supported in the pump body 1, an impeller 5 is provided at one end of the impeller shaft 4, and the impeller 5 is located in the pump head 3, the other end of the impeller shaft 4 is connected to the output end of the bearing box, and the input end of the bearing box is connected to the working shaft of the motor, a cartridge seal 6 is provided in the pump body 1, a front moving ring 7 and a rear moving ring 8 are provided on the cartridge seal 6, a first liquid inlet 9 and a first liquid outlet 10 are provided on the cartridge seal 6, the first liquid inlet 9 and the first liquid outlet 10 are both connected to the rear chamber 11 where the rear moving ring 8 is located, a second liquid inlet 12 is also provided on the cartridge seal 6, the second liquid inlet 12 is connected to the front chamber 13 where the front moving ring 7 is located, and the front chamber 13 is connected to the inner cavity of the pump head 3 through the gap between the impeller shaft 4 and the pump cover 2,

[0013] The ends of the first liquid inlet 9 and the first liquid outlet 10 are both connected with pipelines, and the end of the second liquid inlet 12 is also connected with a pipeline, and the pipeline is connected to a cooling pump in a cooling water circulation system.

[0014] An annular cooling cavity 14 is provided in the pump cover 2 , and an annular plate 15 is provided to match the opening of the cooling cavity 14 . Sealing rings 16 are provided on the outer wall and the inner wall of the annular plate 15 .

[0015] The working process of the OH2 type pump with a special water-cooling chamber sleeve of the embodiment of the utility model is as follows: when the pump is working, the motor drives the bearing box to work, thereby driving the impeller shaft 4 to rotate, and the impeller shaft 4 drives the impeller 5 to rotate in the pump head 3, and the liquid is sucked from the inlet of the pump head 3 and discharged from the outlet, thereby realizing the pumping of the liquid;

[0016] During the rotation of the impeller shaft 4, the front moving ring 7 and the rear moving ring 8 provided in the cartridge seal 6 will generate heat, so the cooling water circulation system is started, and the cooling water is pumped into the rear chamber 11 through the first liquid inlet 9 by a cooling pump, and the cooling water takes away the heat on the rear moving ring 8 and is discharged from the first liquid outlet 10, so that it always maintains a low-temperature working state;

[0017] At the same time, the cooling water also enters the front chamber 13 through the second liquid inlet 12, and the cooling water takes away the heat on the front moving ring 7, and the cooling water flows into the inner cavity of the pump head 3 through the gap between the impeller shaft 4 and the pump cover 2, and finally is discharged from the outlet of the pump head 3;

[0018] As for the front moving ring 7 and the rear moving ring 8, the cooling water is in direct contact with them, and compared with the traditional indirect cooling method, the cooling efficiency is greatly improved.

[0019] At the same time, the cooling chamber 14 opened in the pump cover 2 is closed by an annular plate 15, and circulating cooling water can still be introduced into the cooling chamber 14 during operation (the cooling chamber 14 is provided with a water inlet and a water outlet, and is connected to the cooling water circulation system through a pipeline). Compared with the traditional structure of directly using the pump body to close the pump cover, this structure can save space, thereby installing a larger container seal 6, and also creates conditions for opening liquid inlets and outlets on the container seal 6.

Claims

1. An OH2 type pump with a special water-cooling chamber sleeve, comprising a pump body (1), a pump cover (2) and a pump head (3) connected to the pump body (1), an impeller shaft (4) rotatably supported in the pump body (1), an impeller (5) being arranged at one end of the impeller shaft (4), and the impeller (5) being located in the pump head (3), the other end of the impeller shaft (4) being connected to the output end of the bearing box, and the input end of the bearing box being connected to the working shaft of the motor, characterized in that: The pump body (1) is provided with a cartridge seal (6), and a front moving ring (7) and a rear moving ring (8) are provided on the cartridge seal (6). The cartridge seal (6) is provided with a first liquid inlet (9) and a first liquid outlet (10), and the first liquid inlet (9) and the first liquid outlet (10) are both connected to a rear chamber (11) where the rear moving ring (8) is located. The cartridge seal (6) is also provided with a second liquid inlet (12), and the second liquid inlet (12) is connected to a front chamber (13) where the front moving ring (7) is located. The front chamber (13) is connected to an inner cavity of the pump head (3) through a gap between the impeller shaft (4) and the pump cover (2). The ends of the first liquid inlet (9) and the first liquid outlet (10) are both connected to pipelines, and the end of the second liquid inlet (12) is also connected to a pipeline, and the pipeline is connected to a cooling pump in a cooling water circulation system.

2. The OH2 pump with special water-cooling jacket according to claim 1 is characterized in that: An annular cooling cavity (14) is provided in the pump cover (2), and an annular plate (15) is provided to match the opening of the cooling cavity (14). Sealing rings (16) are provided on the outer wall and the inner wall of the annular plate (15).

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