Seawater-corrosion-resistant pressure-resistant two-way pump

Abstract

The utility model discloses a seawater-corrosion-resistant pressure-resistant two-way pump which comprises a driving gear and a driven gear which are connected with each other, the driven gear is located between an end cover and a rear end cover, the driven gear is located in an aluminum casting shell, a wrapping shell is arranged outside the aluminum casting shell, and the wrapping shell is subjected to double sealing through a first double-layer sealing ring and a second double-layer sealing ring. Oil inlet and outlet connectors are arranged on the left side and the right side of the wrapping shell and provided with connector sealing rings. An outer leakage shaft sleeve and an inner leakage shaft sleeve are arranged between the end cover and the rear end cover, a second matched sealing piece and a third matched sealing piece are arranged at the position of the inner leakage shaft sleeve, and a first matched sealing piece is arranged at the position of the aluminum casting shell. The utility model has the beneficial effects of corrosion resistance, internal high pressure resistance, external high pressure resistance and long service life.

Description

Technical Field

[0001] The utility model relates to the field of gear pumps, in particular to a pressure-resistant two-way pump resistant to seawater corrosion. Background Art

[0002] A gear pump realizes the suction and discharge of liquid through a pair of meshing gears. It is a device that converts hydraulic energy into mechanical energy and is a commonly used actuator in a hydraulic system. For a gear pump, it has the advantages of simple structure, small size, light weight, low price, reliable operation, good self-priming performance, insensitivity to oil pollution, and convenient maintenance.

[0003] The working environment where ordinary gear pumps are widely used is the natural environment. Especially for working conditions of low temperature resistance or high temperature resistance, the initial starting performance of the gear pump can be improved by optimizing the material of the seal. However, when a gear pump works at the bottom of the sea, it not only needs to withstand the low temperature working conditions at the deep sea bottom but also be resistant to seawater corrosion.

[0004] Therefore, it is necessary to develop a new type of pressure-resistant two-way pump resistant to seawater corrosion to meet the working needs at the bottom of the sea. Content of the Utility Model

[0005] Purpose of the utility model: Aiming at the deficiencies and defects of the prior art, the utility model provides a pressure-resistant two-way pump resistant to seawater corrosion, which has the beneficial effects of corrosion resistance, internal high-pressure resistance, external high-pressure resistance, and long service life.

[0006] Technical solution: A pressure-resistant two-way pump resistant to seawater corrosion of the utility model is characterized in that it includes a driving gear and a driven gear which are connected to each other. The driven gear is located between an end cover and a rear end cover, and the driven gear is located inside a cast aluminum housing. An outer wrapping housing is arranged outside the cast aluminum housing. The wrapping housing is double-sealed through a double-layer seal ring I and a double-layer seal ring II. Oil inlet and outlet connectors are arranged on the left and right sides of the wrapping housing, and a connector seal ring is arranged at the oil inlet and outlet connectors. An external leakage shaft sleeve and an internal leakage shaft sleeve are arranged between the end cover and the rear end cover. Supporting seal parts II and III are arranged at the internal leakage shaft sleeve, and a supporting seal part I is arranged at the cast aluminum housing.

[0007] Among them, the end cover is a cover body made of 316L stainless steel.

[0008] Among them, the end cover is fixed through a positioning pin.

[0009] Among them, the wrapping housing is a 316L stainless steel outer housing.

[0010] Among them, the wrapping housing is fixed through M6 screws, and the M6 screws are connected with spring washers.

[0011] Among them, the rear end cover is fixed by M10 bolts, and the M10 bolts are connected with spring washers.

[0012] Among them, the supporting seal one, the supporting seal two and the supporting seal three are all hydrogenated nitrile HNBR seals.

[0013] Among them, the oil inlet and outlet joint is O-ring sealed through the shell thread fastening with the straight hole of the shell wrapping the shell.

[0014] Beneficial effects: Compared with the prior art, the utility model has the following remarkable advantages: The utility model has the beneficial effects of corrosion resistance, internal high-pressure resistance, external high-pressure resistance and long service life, and is widely used in the food industry, ocean engineering, medical equipment, etc. Brief Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the utility model;

[0016] Figure 2 is a cross-sectional structural schematic diagram of the utility model;

[0017] In the figure, 1 is the driving gear; 2 is the end cover; 3 is the double-layer seal one; 4 is the double-layer seal two; 5 is the M6 screw; 6 is the positioning pin; 7 is the wrapping shell; 8 is the cast aluminum shell; 9 is the rear end cover; 10 is the external leakage shaft sleeve; 11 is the driven gear; 12 is the internal leakage shaft sleeve; 13 is the supporting seal one; 14 is the supporting seal two; 15 is the supporting seal three; 16 is the M10 bolt; 17 is the oil inlet and outlet joint; 18 is the joint seal ring. Detailed Embodiments

[0018] The technical solution of the utility model will be further described below in conjunction with the drawings and specific embodiments.

[0019] The pressure-resistant two-way pump of the utility model resistant to seawater corrosion includes a driving gear 1 and a driven gear 11 which are connected to each other. The driven gear 11 is located between the end cover 2 and the rear end cover 9. The driven gear 11 is located in the cast aluminum shell 8. A wrapping shell 7 is arranged outside the cast aluminum shell 8. The wrapping shell 7 is double-sealed through the double-layer seal one 3 and the double-layer seal two 4. Oil inlet and outlet joints 17 are arranged on the left and right sides of the wrapping shell 7, and a joint seal ring 18 is arranged at the oil inlet and outlet joints 17; An external leakage shaft sleeve 10 and an internal leakage shaft sleeve 12 are arranged between the end cover 2 and the rear end cover 9. Supporting seals two 14 and supporting seals three 15 are arranged at the internal leakage shaft sleeve 12, and a supporting seal one 13 is arranged at the cast aluminum shell (8).

[0020] Among them, the end cover 2 is a cover body made of 316L stainless steel, and the end cover replaces the original cast end cover through material optimization. The end cover 2 is fixed by the positioning pin 6. The wrapping housing 7 is a 316L stainless steel outer housing. The wrapping housing 7 is fixed by the M6 screw 5, and the M6 screw 5 is connected with a spring washer. The rear end cover 9 is fixed by the M10 bolt 16, and the M10 bolt 16 is connected with a spring washer. 316L stainless steel has the advantages of corrosion resistance, high temperature resistance, low carbon content, good workability and has been widely used, and is mainly used in fields such as the food industry, ocean engineering, and medical equipment. The 316L stainless steel end cover has no shaft seal design at the gear shaft end. This structural design is beneficial for the hydraulic oil of the two-way pump to lubricate the motor shaft through the shaft end through hole, and generally improves the service life of the power source motor.

[0021] Among them, the supporting seal one 13, the supporting seal two 14 and the supporting seal three 15 are all hydrogenated nitrile HNBR seals, and a double-layer seal design is adopted between the housing and the front cover to ensure the complete sealing of the housing. The oil inlet and outlet joint 17 is O-ring sealed with the straight hole of the housing of the wrapping housing 7 through the housing thread fastening. The sealing design of this part is crucial and directly determines the performance and service life of the two-way pump. The oil inlet and outlet joint 17 is thread-fastened through the wrapping housing 7 and is O-ring sealed through the cast aluminum housing 8.

[0022] The end cover, housing, wrapping housing, rear end cover, external leakage shaft sleeve, internal leakage shaft sleeve, and gear pair of the present utility model are each 1, the seals, oil inlet and outlet joints, and positioning pins are each 2, and there are several fasteners and accessories. All assemblies ensure that the seals and fasteners are installed in place.

[0023] After testing, the pressure-resistant two-way pump of the present utility model resistant to seawater corrosion is used for working in 450 mm deep water under the sea. The overall two-way pump not only withstands the pressure of the deep sea water under the sea, but also is resistant to seawater corrosion. For these two harsh working conditions requirements, an invention improvement is carried out on the basis of the original existing two-way pump, and strict requirements are imposed on the housing material and seal material of the two-way pump. This type of two-way pump end cover has no oil seal design, and the oil can lubricate and cool the motor shaft through the end cover through hole, which can extend the working life of the whole machine. The two-way pump with this structure has a novel design, a relatively high pressure resistance and corrosion resistance level, develops new materials and new process gear pump housings, and lays a foundation for subsequent gear pumps and gear motors to adapt to different harsh working conditions.

Claims

1. A pressure-resistant two-way pump resistant to seawater corrosion, characterized in that: It includes a driving gear (1) and a driven gear (11) which are connected to each other. The driven gear (11) is located between the end cover (2) and the rear end cover (9), and the driven gear (11) is located inside the cast aluminum housing (8). An outer wrapping housing (7) is provided outside the cast aluminum housing (8). The outer wrapping housing (7) is double-sealed by a double-layer seal ring one (3) and a double-layer seal ring two (4). Oil inlet and outlet connectors (17) are provided on the left and right sides of the outer wrapping housing (7), and a connector seal ring (18) is provided at the oil inlet and outlet connectors (17). An external leakage shaft sleeve (10) and an internal leakage shaft sleeve (12) are provided between the end cover (2) and the rear end cover (9). A supporting seal two (14) and a supporting seal three (15) are provided at the internal leakage shaft sleeve (12), and a supporting seal one (13) is provided at the cast aluminum housing (8).

2. The seawater corrosion-resistant and pressure-resistant two-way pump according to claim 1, characterized in that: The end cover (2) is a cover body made of 316L stainless steel.

3. The seawater corrosion-resistant and pressure-resistant two-way pump according to claim 2, characterized in that: The end cover (2) is fixed by a positioning pin (6).

4. The seawater corrosion-resistant pressure-resistant two-way pump according to claim 1, wherein: The outer wrapping housing (7) is a 316L stainless steel outer housing.

5. The seawater corrosion-resistant pressure-resistant two-way pump according to claim 4, wherein: The outer wrapping housing (7) is fixed by M6 screws (5), and the M6 screws (5) are connected with spring washers.

6. The seawater corrosion-resistant pressure-resistant two-way pump according to claim 1, wherein: The rear end cover (9) is fixed by M10 bolts (16), and the M10 bolts (16) are connected with spring washers.

7. The seawater corrosion-resistant pressure-resistant two-way pump according to claim 1, characterized in that: The supporting seal one (13), the supporting seal two (14) and the supporting seal three (15) are all hydrogenated nitrile HNBR seal parts.

8. The seawater corrosion-resistant pressure-resistant two-way pump according to claim 1, characterized in that: The oil inlet and outlet connectors (17) are O-ring sealed through housing threading fastening with the straight holes of the housing of the outer wrapping housing (7).

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