Pump shell integrally formed in die-casting mode

Abstract

The utility model relates to the technical field of fuel pumps, in particular to an integrally die-cast pump case which comprises a pump cover and a pump body, the pump cover and the pump body are integrally die-cast and tightly connected through interference fit, and a hoop is arranged on the outer wall of the joint of the pump cover and the pump body. According to the methanol pump, the pump cover and the pump body are integrally formed through die casting, so that gaps in the pump cover or the pump body can be effectively reduced, the sealing performance of the methanol pump can be effectively improved, and meanwhile, the sealing performance of the joint of the pump cover and the pump body in a high-temperature environment can be greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of fuel pumps, in particular to a pump shell formed by integral die casting. BACKGROUND

[0002] Methanol, as a new energy source capable of replacing traditional fossil fuels, can effectively alleviate the shortage of oil resources and reduce the emission of pollutants. Therefore, methanol has a very broad application prospect. At present, the field using methanol as power is increasing, and countries around the world are increasing research and development in the field of methanol power, hoping that it can be more efficient and practical.

[0003] In the related art, the pump body and the pump cover of the methanol pump are generally welded together, and methanol has volatility and high permeability and corrosiveness in a high-temperature environment, so that methanol can seep out from the welding gap of the pump body, causing adjacent parts to be corroded and contaminated. SUMMARY

[0004] In order to improve the sealing performance of the methanol pump, the application provides a pump shell formed by integral die casting.

[0005] The pump shell formed by integral die casting provided by the application adopts the following technical scheme:

[0006] The pump shell formed by integral die casting comprises a pump cover and a pump body, the pump cover and the pump body are formed by integral die casting, the pump cover and the pump body are tightly connected through interference fit, and the outer wall at the connection between the pump cover and the pump body is provided with a clamp.

[0007] Through the above technical scheme, the pump cover and the pump body are both formed by integral die casting, which can effectively reduce the gap on the pump cover or the pump body and improve the sealing performance of the methanol pump.

[0008] In the related art, the methanol pump is generally connected with a methanol engine, so that the working environment temperature of the methanol pump is relatively high, and since the pump cover and the pump body are tightly connected through interference fit, the sealing performance of the connection between the pump cover and the pump body in a high-temperature environment is greatly improved.

[0009] Optionally, the pump cover is integrally die cast with a clamping ring on one side, the pump body is integrally die cast with a clamping groove on one side, and the clamping ring and the clamping groove are interference fit.

[0010] Through the above technical scheme, the clamping ring is pressed into the clamping groove after cooling, so that the pump cover and the pump body are connected.

[0011] Optionally, the pump cover is integrally die cast with a liquid storage groove, a liquid outlet pipe and a plurality of liquid inlet pipes, the liquid storage groove is in communication with the liquid outlet pipe and the liquid inlet pipes, and the pump body is integrally die cast with an impeller groove, and the impeller groove is in communication with the liquid storage groove.

[0012] By adopting the technical scheme, the methanol can be sent into the groove connected with the impeller groove and the liquid storage groove through the liquid inlet pipe, and then sent into the engine from the liquid outlet pipe.

[0013] Optionally, annular sealing grooves are arranged on the liquid outlet pipe and the liquid inlet pipe, and sealing rings are arranged in the opposite sidewalls of the sealing grooves.

[0014] By adopting the technical scheme, when the liquid outlet pipe or the liquid inlet pipe is connected with the external pipeline, the external pipeline is inserted into the sealing groove and abuts against the sealing ring in the sealing groove.

[0015] Optionally, an oil groove is arranged in the groove bottom of the sealing groove and communicates with the sealing groove, an oil inlet pipe is arranged on the sidewall of the liquid outlet pipe or the liquid inlet pipe, the oil inlet pipe communicates with the oil groove, and low-viscosity lubricating oil is filled in the oil groove.

[0016] By adopting the technical scheme, the external pipeline is inserted into the oil groove for liquid sealing, and in the related art, the lubricating oil can reduce the friction when the pipeline is connected with the sealing groove and will not have adverse reactions with the methanol.

[0017] Optionally, a sealing inner ring and a sealing outer ring which are both elastic are arranged on the opposite sidewalls of the oil groove, an external thread is arranged on the sealing inner ring, an internal thread is arranged on the sealing outer ring, and the external thread abuts against the internal thread.

[0018] By adopting the technical scheme, the leakage of the lubricating oil in the oil groove can be avoided through the abutment of the sealing inner ring and the sealing outer ring. In addition, since the sealing inner ring and the sealing outer ring are both elastic, the pipeline can pass through the sealing inner ring and the sealing outer ring when the external pipeline is connected.

[0019] Meanwhile, the pipeline can be threadedly connected with the threads of the sealing inner ring or the sealing outer ring.

[0020] Optionally, a guide sliding surface is arranged on the side of the sealing inner ring and the sealing outer ring away from the groove bottom of the oil groove.

[0021] By adopting the technical scheme, the external pipeline can be conveniently inserted between the sealing inner ring and the sealing outer ring.

[0022] Optionally, an annular sealing block is arranged on the clamp and abuts against the connection position of the pump cover and the pump body.

[0023] By adopting the technical scheme, the sealing performance of the connection position of the pump cover and the pump body can be further improved through the abutment of the sealing block and the connection position of the pump cover and the pump body.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. The pump cover and the pump body are integrally pressure cast, which can effectively reduce the gap on the pump cover or the pump body, and can effectively improve the sealing performance of the methanol pump.

[0026] 2. The sealing performance of the connection between the pump cover and the pump body in a high temperature environment is greatly improved.

[0027] 3. The lubricating oil can reduce the friction when the pipeline is connected with the sealing groove, and can seal the methanol in liquid form to improve the sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present application;

[0029] Figure 2 is Figure 1 is a schematic diagram of the structure along the A-A plane;

[0030] Figure 3 is Figure 2 is an enlarged schematic diagram of the local structure at B in the pump body.

[0031] BRIEF DESCRIPTION OF DRAWINGS: 1, pump cover; 2, pump body; 3, clamp; 4, clamping ring; 5, clamping groove; 6, sealing block; 7, liquid outlet pipe; 8, liquid inlet pipe; 9, liquid storage groove; 10, impeller groove; 11, sealing groove; 12, first annular groove; 13, sealing ring; 14, oil groove; 15, oil inlet pipe; 16, second annular groove; 17, inner sealing ring; 18, outer sealing ring; 19, guide sliding surface. DETAILED DESCRIPTION

[0032] The following will be described in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 3 , and the present application will be further described in detail.

[0033] An integrally pressure cast pump shell, referring to Figure 1 , comprises a pump cover 1 and a pump body 2, the pump cover 1 and the pump body 2 are integrally pressure cast, the pump cover 1 and the pump body 2 are tightly connected through interference fit, and the outer wall of the connection between the pump cover 1 and the pump body 2 is provided with a clamp 3.

[0034] Referring to Figure 2 , the pump cover 1 is integrally connected with a clamping ring 4 on the side close to the pump body 2, the pump body 2 is integrally provided with a clamping groove 5 on the side close to the pump cover 1, and the thickness of the clamping ring 4 is 1mm greater than the width of the clamping groove 5. The clamping ring 4 is pressed into the clamping groove 5 after cooling, so that the clamping ring 4 and the clamping groove 5 form interference fit and interfere with each other.

[0035] Referring to Figure 2 , Figure 3 , the inner wall of the clamp 3 is fixedly connected with an annular sealing block 6, and the annular sealing block 6 abuts at the connection between the pump cover 1 and the pump body 2.

[0036] Referring to Figure 2 The pump cover 1 is integrally connected with a liquid outlet pipe 7 on the side away from the pump body 2, and the side wall of the pump cover 1 is integrally connected with two symmetrical liquid inlet pipes 8, and the side of the pump cover 1 close to the pump body 2 is integrally provided with a liquid storage groove 9, and the liquid storage groove 9 is communicated with the liquid outlet pipe 7 and the two liquid inlet pipes 8, and the communicated grooves do not interfere with each other.

[0037] The pump body 2 is provided with an impeller groove 10 on the side close to the pump cover 1, and the impeller groove 10 is provided with an impeller. The pump body 2 is provided with a motor, and the power rod of the motor penetrates the groove bottom of the impeller groove 10 and is fixedly connected with the impeller. In addition, a sealing element is arranged at the connecting position of the power rod and the groove bottom of the impeller groove 10.

[0038] Referring to Figure 2 , Figure 3 The liquid outlet pipe 7 and the liquid inlet pipe 8 are both provided with an annular sealing groove 11 for inserting an external pipe. The two opposite inner walls of the sealing groove 11 are both provided with a first annular groove 12, and the two first annular grooves 12 are both fixedly connected with a sealing ring 13.

[0039] The sealing groove 11 is further extended to the groove bottom to form an oil groove 14 for filling lubricating oil, and the outer wall of the liquid outlet pipe 7 and the liquid inlet pipe 8 is integrally formed with an oil inlet pipe 15, the oil inlet pipe 15 is communicated with the oil groove 14, and the oil inlet pipe 15 is screwed with a fixing cap. The two opposite inner walls of the oil groove 14 are provided with a second annular groove 16, and the two second annular grooves 16 are respectively fixedly connected with a sealing inner ring 17 and a sealing outer ring 18 which are elastic.

[0040] The sealing inner ring 17 is integrally connected with an external thread, and the sealing inner ring 17 is integrally provided with an internal thread. The external thread extends into the internal thread and abuts against each other. The sealing inner ring 17 and the sealing outer ring 18 are provided with a guide sliding surface 19 on the side away from the oil groove 14, and the two opposite guide sliding surfaces 19 are used to guide the inserted external pipe to extend into the sealing inner ring 17 and the sealing outer ring 18.

[0041] The implementation principle of the embodiment of the application is that when the pump cover 1 is connected with the pump body 2, the pump cover 1 is cooled first, and then the cooled pump cover 1 is interference fitted with the pump body 2, so that the two are tightly connected.

[0042] When the liquid outlet pipe 7 or the liquid inlet pipe 8 of the pump cover 1 is connected with an external pipe, the pipe extends into the sealing groove 11, and the two opposite sealing rings 13 abut against the inner wall and the outer wall of the pipe at this time.

[0043] The pipe further extends into the sealing groove 11 and abuts against the guide sliding surface 19 on the sealing inner ring 17 and the sealing outer ring 18, and continues to extend into the sealing inner ring 17 and the sealing outer ring 18, and extrudes the sealing inner ring 17 and the sealing outer ring 18.

[0044] The inner wall of the pipe has internal threads to threadably engage the external threads of the sealing inner ring 17, or the outer wall of the pipe has external threads to threadably engage the internal threads of the sealing outer ring 18, so that the pipe is further sealed and fixed. The pipe, after being threadably engaged, extends into the oil tank 14 and abuts the bottom of the oil tank 14.

[0045] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pump casing integrally die-cast, comprising a pump cover (1) and a pump body (2), characterized in that: The pump cover (1) and the pump body (2) are integrally die-cast. The pump cover (1) and the pump body (2) are tightly connected by interference fit. A clamp (3) is provided on the outer wall of the connection between the pump cover (1) and the pump body (2).

2. The pump housing integrally die-cast according to claim 1, characterized in that: The pump cover (1) has a snap ring (4) integrally die-cast on one side, and the pump body (2) has a snap groove (5) integrally die-cast on one side. The snap ring (4) and the snap groove (5) are interference fit.

3. The pump housing integrally die-cast according to claim 1, characterized in that: The pump cover (1) is integrally die-cast and has a liquid storage tank (9), a liquid outlet pipe (7) and several liquid inlet pipes (8). The liquid storage tank (9) is connected to the liquid outlet pipe (7) and the liquid inlet pipes (8) respectively. The pump body (2) is integrally die-cast and has an impeller groove (10). The impeller groove (10) is connected to the liquid storage tank (9).

4. The pump casing integrally die-cast according to claim 3, characterized in that: Both the outlet pipe (7) and the inlet pipe (8) are provided with annular sealing grooves (11), and sealing rings (13) are provided on the opposite side walls of the sealing grooves (11).

5. The pump housing integrally die-cast according to claim 4, characterized in that: The bottom of the sealing groove (11) is provided with an oil groove (14) that communicates with the sealing groove (11). An oil inlet pipe (15) is provided on the side wall of the liquid outlet pipe (7) or liquid inlet pipe (8). The oil inlet pipe (15) communicates with the oil groove (14). The oil groove (14) is filled with lubricating oil with low viscosity.

6. The pump housing integrally die-cast according to claim 5, characterized in that: On the two opposite sidewalls at the opening of the oil trough (14), there are elastic sealing inner rings (17) and sealing outer rings (18). The sealing inner ring (17) is provided with external threads, and the sealing outer ring (18) is provided with internal threads. The external threads and internal threads abut against each other.

7. The pump housing integrally die-cast according to claim 6, characterized in that: The inner sealing ring (17) and the outer sealing ring (18) are provided with guide surfaces (19) on the side away from the bottom of the oil groove (14).

8. The pump housing integrally die-cast according to claim 1, characterized in that: The clamp (3) is provided with an annular sealing block (6), which abuts against the connection between the pump cover (1) and the pump body (2).

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