Gear pump sealing performance testing device

Abstract

The utility model discloses a gear pump sealing performance testing device which comprises a table top, a mounting groove is formed in the top of the table top, and the shape of the mounting groove is matched with that of a gear pump. And an air inlet is formed in the table top and is communicated with the mounting groove. According to the utility model, the same tool can be used for the upper pressure air tightness test and the lower pressure air tightness test of the fuel oil type gear pump, and the universality is strong. After the fuel oil type gear pump is placed on the tool, automatic inflation detection of equipment can be met, and the labor cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing gear fuel pumps, and particularly relates to a sealing test device for gear pumps. Background Art

[0002] The gear fuel pump uses the mutual rotation of two gears to suck fuel from the inlet, compress it and discharge it from the outlet. It has the advantages of simple structure, reliable operation and convenient maintenance. It is widely used in large trucks, buses and industrial oil pumps. Before leaving the factory, the gear fuel pump needs to undergo numerous tests. Among them, in order to detect whether it can effectively prevent gas or liquid leakage, airtightness inspection is a necessary test in the factory test.

[0003] The existing airtightness detection devices for gear fuel pumps generally use quick connectors to connect the inlet and outlet, and then use an external air source to inflate the pump cavity to check for leakage. There are problems such as being not suitable for automated operation of the equipment, long time consumption for a single station, and being not convenient to test whether the outer cavity of the gear pump leaks, with poor versatility. Summary of the Utility Model

[0004] To solve the above problems, the utility model provides a sealing test device for gear pumps, enabling the same tooling to be used for the upper-pressure airtightness test and the lower-pressure airtightness test of fuel gear pumps, with strong versatility. After the fuel gear pump is placed on the tooling, it can meet the automatic air inflation detection of the equipment, saving labor costs.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a sealing test device for gear pumps, including a tabletop, an installation groove is arranged at the top of the tabletop, and the shape of the installation groove matches the shape of the gear pump; an air inlet is arranged on the tabletop, and the air inlet is communicated with the installation groove.

[0006] As a preferred technical solution of the utility model: the air inlet is located outside the tabletop, a first air inlet is arranged in the installation groove, and the first air inlet is communicated with the air inlet.

[0007] As a preferred technical solution of the utility model: an air inlet joint is arranged on the air inlet.

[0008] As a preferred technical solution of the utility model: a base is arranged at the bottom of the tabletop, and the tabletop is movably connected with the base.

[0009] As a preferred technical solution of the utility model: the tabletop and the base are made of steel materials.

[0010] As a preferred technical solution of the utility model: a sealing groove is arranged in the installation groove, and the sealing groove is used for installing a sealing ring.

[0011] The utility model has the following beneficial effects:

[0012] 1. The same tooling can be used for the upper-pressure airtightness test and the lower-pressure airtightness test of the fuel-driven gear pump, with strong versatility. After the fuel-driven gear pump is placed on the tooling, it can meet the automatic inflation detection of the equipment, saving labor costs.

[0013] 2. The whole is made of steel materials, improving the service life. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model

[0015] Figure 2 is Figure 1 the left view of;

[0016] Figure 3 is Figure 2 the sectional view taken along the A-A direction of;

[0017] Figure 4 is Figure 2 the sectional view taken along the B-B direction of;

[0018] Figure 5 is the schematic diagram of the overall structure with a base;

[0019] Figure 6 is the schematic diagram of the overall structure during testing;

[0020] Figure 7 is Figure 6 the top view of;

[0021] Figure 8 is Figure 7 the sectional view taken along the A-A direction of;

[0022] Figures 1-8 In, 1. Tabletop; 2. Installation groove; 3. Fuel-driven gear pump; 4. Pump housing; 5. Air inlet; 6. First air inlet; 7. Air outlet; 8. Air outlet channel; 9. Air inlet joint; 10. Sealing groove; 11. Base; 12. Oil inlet and outlet; 13. Positioning block. Detailed Implementation Modes

[0023] In order to make the purpose and advantages of the utility model clearer, the following further details the utility model in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0024] As Figures 1-8As shown in the figure, the embodiment of the present utility model provides a gear pump sealing performance testing device, including a table 1. At the top of the table 1, there is an installation groove 2. The shape of the installation groove 2 matches the shape of the fuel-type gear pump 3, that is, one end of the fuel-type gear pump 3 can be completely placed into the installation groove 2, and at the same time, the pump housing 4 of the fuel-type gear pump 3 fits against the upper end of the table 1. In order to enable rapid assembly of the fuel-type gear pump 3, a positioning block 13 is provided above the table 1. An air inlet 5 is provided on the table 1, and the air inlet 5 communicates with the installation groove 2. During the detection of the internal cavity sealing performance, after closing the air inlet 5, the fuel-type gear pump 3 is placed and fixed on the table 1. At this time, compressed air is introduced into the oil inlet and outlet holes 12 of the fuel-type gear pump 3 to test the sealing performance. During the detection of the external cavity sealing performance, compressed air is connected through the air inlet 5. After the oil inlet and outlet holes 12 are closed, air is introduced into the external cavity through the air inlet 5 to test the sealing performance. The same tooling can be used for the upper pressure airtightness test and the lower pressure airtightness test, with strong versatility. After the fuel-type gear pump 3 is placed on the tooling, it can meet the automatic inflation detection of the equipment, saving labor costs.

[0025] The air inlet 5 is located outside the table 1. A first air inlet 6 is provided in the installation groove 2. An arched air outlet 7 is provided at the upper part of the first air inlet 6, and an air outlet channel 8 is provided on one side of the air outlet 7; the first air inlet 6 communicates with the air inlet 5. In this embodiment, preferably, the first air inlet 5 is provided below the installation groove 2, and an air outlet channel 8 is provided on the side of the first air inlet 5, which is convenient for air intake and also convenient for testing; in order to facilitate the connection and disassembly of the compressed air pipe, an air inlet joint 9 is provided on the air inlet 5. A sealing groove 10 is provided in the installation groove 2, and the sealing groove 10 is used for installing a sealing ring. The setting of the sealing ring enables the fuel-type gear pump 3 and the installation groove 2 to be easily subjected to radial static sealing, and at the same time, it is convenient for the matching dimensions.

[0026] A base 11 is provided at the bottom of the table 1. The table 1 is movably connected to the base 11, that is, the table 1 is connected to the base 11 by bolts. The setting of the base 11 improves the stability of the table 1. The materials of the table 1 and the base 11 are preferably steel materials, and the steel materials improve the service life.

[0027] The working principle of this specific implementation is as follows: When detecting the internal cavity sealing performance of the fuel-type gear pump 3 product, the air inlet joint 9 is sealed, and the gear pump is placed and fixed in the installation groove 2. At this time, compressed air is introduced into the oil inlet and outlet holes 12 of the fuel-type gear pump 3 to test the sealing performance;

[0028] When detecting the external cavity sealing performance of the gear pump, the air inlet joint 9 is connected to compressed air, the oil inlet and outlet holes 12 of the fuel-type gear pump 3 are sealed, and after the fuel-type gear pump 3 is installed with an O-ring, it is placed and fixed in the installation groove 2. At this time, air is introduced into the external cavity of the fuel-type gear pump 9 through the air inlet joint 9 to test the sealing performance.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A gear pump sealing test device, characterized in that: The invention comprises a table top (1), wherein a mounting groove (2) is arranged at the top of the table top (1), and the shape of the mounting groove (2) matches the shape of the gear pump; an air inlet (5) is arranged on the table top (1), and the air inlet (5) is connected with the mounting groove (2).

2. A gear pump sealing test device according to claim 1, characterized in that: The air inlet (5) is located on the outside of the table top (1), and a first air inlet (6) is arranged in the installation groove (2), and the first air inlet (6) is connected to the air inlet (5).

3. A gear pump sealing test device according to claim 2, characterized in that: The air inlet (5) is provided with an air inlet connector (9).

4. A gear pump sealing test device according to claim 2, characterized in that: A base (11) is provided at the bottom of the table top (1), and the table top (1) is movably connected to the base (11).

5. A gear pump sealing test device according to claim 4, characterized in that: The table top (1) and the base (11) are made of steel.

6. A gear pump sealing test device according to any one of claims 1 to 5, characterized in that: A sealing groove (10) is provided in the installation groove (2), and the sealing groove (10) is used for installing a sealing ring.

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