Fuel supply pump set and fuel supply equipment

Abstract

This invention discloses a fuel supply pump set and a fuel supply device, belonging to the field of fuel supply technology. The fuel supply pump set includes a housing and a sealing assembly. The housing has a receiving cavity for containing fuel. The sealing assembly is connected to the housing and is used to seal the receiving cavity. The housing also has a first airtightness detection space for containing detection gas. The sealing assembly is disposed between the first airtightness detection space and the receiving cavity to isolate the first airtightness detection space and the receiving cavity. When the sealing assembly fails and fuel leaks into the receiving cavity, the gas pressure in the first airtightness detection space can be detected to determine whether the fuel supply pump set is leaking, and the fuel supply pump set can be stopped for maintenance in a timely manner. This allows users to maintain the fuel supply pump set in a timely manner, which improves the safety of the fuel supply pump set to a certain extent. It also allows for a shorter pipeline between the fuel supply system with the integrated fuel supply pump set and the engine, thus controlling fuel usage costs.

Description

Technical Field

[0001] This invention relates to the field of marine equipment technology, specifically to a fuel supply pump set and fuel supply equipment. Background Technology

[0002] Currently, engines used in ships and other equipment are often supplied with fuels such as methanol by a fuel supply system. In related technologies, for fuel safety reasons, equipment such as plunger pumps that pressurize the fuel are often located in separate areas from the engine, and the pressurized fuel is delivered through double-walled pipes. This is to prevent fuel leaks in the fuel supply system from endangering the safety of the crew and the ship. This results in long fuel delivery pipelines, significant fuel pressure loss within the pipelines, and the fuel supply system and engine occupying considerable space, all contributing to higher fuel costs. Summary of the Invention

[0003] The embodiments of the present invention provide a fuel supply pump set and a fuel supply device, which can improve the technical problem of high fuel usage costs.

[0004] In a first aspect, embodiments of the present invention provide a fuel supply pump assembly, comprising:

[0005] The casing has a receiving cavity for holding fuel;

[0006] A sealing assembly, connected to the housing, for sealing the receiving cavity;

[0007] The housing also includes a first airtight detection space for accommodating the detection gas; the sealing assembly is disposed between the first airtight detection space and the accommodating cavity to isolate the first airtight detection space and the accommodating cavity.

[0008] In one embodiment, the fuel supply pump assembly further includes:

[0009] The piston is movably disposed within the receiving cavity;

[0010] The sealing assembly includes:

[0011] A first seal is disposed between the piston and the housing.

[0012] In one embodiment, the housing includes:

[0013] The main body has the aforementioned receiving cavity;

[0014] A cover portion is fixedly disposed at one end of the main body portion, and the cover portion has a clearance space communicating with the receiving cavity;

[0015] Wherein, at least a portion of the piston component passes through the clearance space; the first seal is disposed in the clearance space and is located between the cover portion and the piston component; at least a portion of the first airtightness detection space is located on the side of the clearance space away from the receiving cavity and communicates with the clearance space; the first airtightness detection space is located on the side of the first seal away from the receiving cavity.

[0016] In one embodiment, the main body is provided with a plurality of first airtightness detection spaces; a connecting groove is provided at one end of the main body near the cover; at least a portion of the first airtightness detection spaces are connected through the connecting groove.

[0017] In one embodiment, the fuel supply pump assembly further includes:

[0018] The first sealing ring is located between the cover portion and the main body portion;

[0019] The first sealing ring is located on the periphery of the connecting groove to form a seal for the first airtightness detection space.

[0020] In one embodiment, the fuel supply pump assembly further includes:

[0021] A second sealing ring is disposed between the cover body and the piston member to seal the clearance space.

[0022] The cover portion has:

[0023] A fuel passage connects the clearance space and the first airtightness detection space;

[0024] The fuel passage is located between the first seal and the second sealing ring, with one end of the passage connecting to the clearance space.

[0025] In one embodiment, the sealing assembly further includes:

[0026] The second sealing element is fixedly disposed at one end of the main body that is away from the cover body;

[0027] The first airtightness detection space has a first opening at the end of the main body away from the cover; the receiving cavity has a second opening at the end of the main body away from the cover; the first opening is located on the periphery of the second seal; and the second opening is located on the inner periphery of the second seal.

[0028] In one embodiment, the fuel supply pump assembly further includes:

[0029] A filling assembly is disposed within the receiving cavity and located between the main body and the piston member to form a seal between the main body and the piston member.

[0030] In one embodiment, the filling assembly and the piston divide the receiving cavity into a pressurizing cavity and a lubrication cavity; wherein the pressurizing cavity is located at the end of the filling assembly away from the cover portion; the lubrication cavity is located between the cover portion and the filling assembly, and the cover portion is disposed between the first airtightness detection space and the lubrication cavity.

[0031] In one embodiment, the main body portion is provided with:

[0032] A lubrication channel, communicating with the lubrication cavity;

[0033] The lubrication channel has a third opening at the end of the main body away from the cover; the third opening is located inside the second seal.

[0034] In one embodiment, the fuel supply pump assembly further includes:

[0035] An adapter block is fixedly connected to the housing, and the adapter block has a feeding channel and a discharging channel;

[0036] A first check valve is disposed between the feed channel and the receiving cavity;

[0037] A second one-way valve is disposed between the receiving cavity and the discharge channel.

[0038] In one embodiment, the adapter block is further provided with:

[0039] A feeding interface is located at one end of the feeding channel;

[0040] The second airtight detection space is used to contain the detection gas;

[0041] The second airtightness detection space has a fourth opening at the feed interface; the fourth opening is connected to the feed channel through the feed interface.

[0042] In one embodiment, the second airtightness detection space is connected to the first airtightness detection space.

[0043] In one embodiment, the adapter block further includes:

[0044] The discharge port is located at one end of the discharge channel;

[0045] The third airtightness detection space is used to contain the detection gas. The third airtightness detection space has a fifth opening at the discharge interface, and the fifth opening is connected to the discharge channel through the discharge interface.

[0046] In one embodiment, the adapter block further includes:

[0047] A side channel is connected to the discharge channel;

[0048] An accumulator connection port is used to connect an accumulator, and the accumulator connection port is connected to the side channel;

[0049] The third airtightness testing space is connected to the side channel through the accumulator connection port.

[0050] Secondly, embodiments of the present invention provide a fuel supply device for supplying fuel to a gas-using device, the fuel supply system including the aforementioned fuel supply pump set.

[0051] In one embodiment, the fuel is configured as methanol;

[0052] The detection gas is configured to be at least one of nitrogen and inert gas.

[0053] The beneficial effects of the embodiments of the present invention are as follows:

[0054] In embodiments of the present invention, while sealing the receiving cavity using a sealing assembly, a first airtightness detection space is provided on the housing. When the sealing assembly fails and fuel leaks from the receiving cavity, the fuel can flow into the first airtightness detection space. Thus, by detecting the air pressure within the first airtightness detection space, it can be determined whether the fuel supply pump unit is leaking, allowing for timely shutdown and maintenance. Furthermore, a structure can be further provided to seal the first airtightness detection space, preventing immediate leakage to the outside when gas leaks from the receiving cavity. In other words, the first airtightness detection space provides a buffer against leaked gas from the receiving cavity leaking to the outside of the fuel supply pump unit, enabling timely maintenance by the user and improving the safety of the fuel supply pump unit. This also allows for a shorter pipeline between the fuel supply system (integrated with the fuel supply pump unit) and the engine, reducing pressure loss of the fuel in the pipeline and minimizing the overall space occupied by the fuel supply system and engine, thereby controlling fuel usage costs. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a perspective view of the fuel supply pump assembly provided in an embodiment of the present invention;

[0057] Figure 2 yes Figure 1 A three-dimensional schematic diagram of a portion of the fuel supply pump unit shown.

[0058] Figure 3 yes Figure 2 A cross-sectional view of a portion of the structure near the first airtightness testing space;

[0059] Figure 4 yes Figure 2 A cross-sectional view of part of the structure near the lubrication channel;

[0060] Figure 5 yes Figure 3 Schematic diagram of the main body structure;

[0061] Figure 6 yes Figure 5 Sectional view along AA;

[0062] Figure 7 yes Figure 5 Sectional view along BB;

[0063] Figure 8 yes Figure 3 A sectional view of the middle cover body;

[0064] Figure 9 yes Figure 2 A cross-sectional view of the structure shown;

[0065] Figure 10 yes Figure 2 The structure shown is a cross-sectional view at another section.

[0066] Figure 11 yes Figure 10 A magnified view of a section at point A in the middle;

[0067] Figure 12 This is a schematic diagram of the connection relationship between the double-walled pipe and the adapter block in the fuel supply pump set provided in an embodiment of the present invention;

[0068] Figure 13 yes Figure 2 A schematic diagram of the structure of the adapter block;

[0069] Figure 14 yes Figure 13 The adapter block shown is a three-dimensional sectional view near the feed channel;

[0070] Figure 15 yes Figure 13 A three-dimensional cross-sectional view of the adapter block near the second airtightness testing space;

[0071] Figure 16 yes Figure 13 The adapter block shown is a planar cross-sectional view near the feed channel;

[0072] Figure 17 yes Figure 13 The adapter block shown is a perspective view at the first cross section;

[0073] Figure 18 yes Figure 13 The adapter block shown is a perspective view at the second section.

[0074] Explanation of reference numerals in the attached figures:

[0075] 100. Fuel supply pump set;

[0076] 110. Shell; 110a. Receiving cavity; 110b. First airtightness testing space; 110c. First opening; 110d. Second opening; 110e. Pressurization chamber; 110f. Lubrication chamber; 110g. Third opening; 110h. Lubrication channel; 111. Main body; 111a. Connecting groove; 111b. Second sealing groove; 111c. End face groove; 112. Cover body; 112a. Clearance space; 112b. First sealing groove; 112c. Lubrication hole; 112d. Fuel channel; 113. First sealing ring; 114. Second sealing ring; 115. Third sealing ring; 116. Fourth sealing ring;

[0077] 120. Sealing assembly; 121. First seal; 122. Second seal;

[0078] 130. Piston components;

[0079] 140. Filler component; 141. First filler; 141a. Fitting groove; 142. Second filler; 142a. Fitting protrusion;

[0080] 150, Adapter block; 150a, Feed channel; 150b, Discharge channel; 150c, Feed interface; 150d, Second airtightness testing space; 150e, Fourth opening; 150f, Discharge interface; 150g, Third airtightness testing space; 150h, Fifth opening; 150i, Sixth opening; 150j, Side support channel; 150k, Side branch channel; 150l, Accumulator connection port;

[0081] 160. First check valve;

[0082] 170. Second check valve;

[0083] 180. Double-walled pipe; 180a. Conical surface; 181. Inner pipe; 181a. Conveying channel; 182. Outer pipe; 182a. Protective channel; 183. Screw sleeve; 184. Fifth sealing ring; 185. Sixth sealing ring; 186. Bushing;

[0084] 10. Fuel supply equipment; 11. Drive motor; 12. Crank and connecting rod mechanism; 13. Lubricant supply pump; 14. Heat exchanger; 15. Filter; 16. Accumulator. Detailed Implementation

[0085] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0086] Reference Figures 1 to 18 As shown, some embodiments of the present invention provide a fuel supply pump assembly 100, which can be used as part of a fuel supply device 10 to supply fuel to equipment such as an engine. The fuel supply pump assembly 100 includes a housing 110 and a sealing assembly 120.

[0087] The housing 110 includes a receiving cavity 110a for containing fuel. The specific type of fuel is not limited in this invention; for example, methanol may be a suitable fuel. The receiving cavity 110a can specifically serve as a chamber for pressurizing the fuel. For instance, it can be a chamber in a plunger pump for the movement of the plunger, pressurizing the fuel within it during the plunger's movement. In other words, the housing 110 can be part of a plunger pump. Of course, depending on actual usage requirements, the housing 110 can also be integrated into other types of equipment. A sealing assembly 120 is connected to the housing 110 to seal the receiving cavity 110a, preventing unnecessary fuel leakage to the outside.

[0088] Taking methanol as an example, methanol is pressurized in the receiving chamber 110a. With the sealing component 120 installed, the fuel can theoretically be delivered to the engine and other equipment without leakage. However, under the influence of factors such as long-term use, changes in fuel pressure, or other external forces, the sealing component 120 may be damaged, causing fuel leakage. In actual use, such leakage will cause the fuel to flow to the external environment where the fuel supply pump unit 100 is located, posing a safety hazard.

[0089] The housing 110 of the present invention also includes a first airtight detection space 110b for accommodating the detection gas. A sealing assembly 120 is disposed between the first airtight detection space 110b and the accommodating cavity 110a to isolate the two spaces. When the sealing assembly 120 is damaged and fuel leaks from the accommodating cavity 110a, fuel can flow into the first airtight detection space 110b, occupying the space and causing a change in the gas pressure within it. Therefore, the change in gas pressure can be detected by installing a pressure sensor or similar device in the first airtight detection space 110b to determine whether fuel is leaking from the accommodating cavity 110a.

[0090] By adopting the above scheme, while sealing the receiving cavity 110a with the sealing component 120, a first airtightness detection space 110b is provided on the housing 110. When the sealing component 120 fails and fuel leaks in the receiving cavity 110a, the fuel can flow to the first airtightness detection space 110b. In this way, by detecting the air pressure in the first airtightness detection space 110b, it can be determined whether the fuel supply pump group 100 is leaking and the fuel supply pump group 100 can be stopped for maintenance in a timely manner.

[0091] Furthermore, a structure can be further provided to seal the first airtightness detection space 110b, so that when fuel leaks in the receiving cavity 110a, it will not immediately leak to the outside. In other words, the setting of the first airtightness detection space 110b provides a buffer for the fuel leaking from the receiving cavity 110a to the outside of the fuel supply pump group 100, so that the user can maintain the fuel supply pump group 100 in a timely manner, which improves the safety of the use of the fuel supply pump group 100 to a certain extent. It also allows for a shorter pipeline between the fuel supply system integrating the fuel supply pump group 100 and the engine, reducing the pressure loss of the fuel in the pipeline and reducing the overall space occupied by the fuel supply system and the engine, thereby controlling the fuel usage cost.

[0092] The selection of the detection gas can be flexibly set according to actual needs. The composition of the detection gas and the fuel can be different. For example, the detection gas can be a gas that is not conventionally understood to be usable or difficult to use as fuel, in order to avoid danger in the event of leakage in the first airtight detection space 110b during normal use. As a specific example, the detection gas can be at least one of nitrogen and inert gas.

[0093] As mentioned earlier, the housing 110 can be part of some fuel pressurization device. As a specific example of a structure that integrates the housing 110 to realize fuel pressurization, the fuel supply pump assembly 100 also includes a piston 130.

[0094] The piston 130 is movably disposed within the receiving cavity 110a. In some application scenarios, the piston 130 moves within the receiving cavity 110a, reducing the volume of a portion of the area containing fuel within the receiving cavity 110a, thereby compressing the fuel to achieve fuel pressurization.

[0095] Piston 130 can pass through cover 112 to facilitate connection between piston 130 and drive member that drives piston 130 to move relative to housing 110. Figure 1 and Figure 2 In one specific embodiment of the example, the driving component is the entirety of the drive motor 11 and the crank-connecting rod mechanism 12 connected between the drive motor 11 and the piston 130. Of course, the driving component can also be other forms of structure, which are not limited here.

[0096] There is relative movement between the piston 130 and the housing 110, and a seal is often provided between the piston 130 and the housing 110 to prevent leakage.

[0097] Specifically, in some embodiments of the present invention, the sealing assembly 120 includes a first seal 121. The first seal 121 is disposed between the piston 130 and the housing 110, that is, the first seal 121 fills the gap between the piston 130 and the housing 110, providing a seal when the piston 130 moves relative to the housing 110. The first seal 121 can be positioned and installed by having corresponding first sealing grooves 112b on the housing 110 or the piston 130; the number of first seals 121 is not limited herein.

[0098] In a more specific embodiment, the housing 110 includes a main body 111 and a cover 112. The main body 111 has a receiving cavity 110a, meaning that at least a portion of the piston member 130 is movably disposed within the main body 111. For a specific embodiment, see [reference needed]. Figure 2 , Figure 3 and Figure 4 As shown, the piston 130 is slidably connected to the main body 111, for example.

[0099] The cover portion 112 is fixedly disposed at one end of the main body portion 111. The cover portion 112 has a clearance space 112a communicating with the receiving cavity 110a. At least a portion of the piston member 130 passes through the clearance space 112a. The cover portion 112 can be used to close the receiving cavity 110a. Since the piston member 130 passes through the clearance space 112a, the cover portion 112 can also be used to limit the piston member 130 so that the piston member 130 moves more smoothly. The first seal 121 is disposed within the clearance space 112a and located between the cover portion 112 and the piston portion 130, such that the first seal 121 is suitable for providing a seal to the receiving cavity 110a at the end of the main body portion 111 near the cover portion 112, preventing fuel in the receiving cavity 110a from leaking outward from the gap between the piston portion 130 and the cover portion 112. The aforementioned first sealing groove 112b can be recessed into the wall surface of the cover portion 112 forming the clearance space 112a, so as to facilitate the positioning and installation of the first seal 121 on the cover portion 112.

[0100] At least a portion of the first airtightness testing space 110b is located on the side of the clearance space 112a away from the receiving cavity 110a, and is in communication with the clearance space 112a. The first airtightness testing space 110b is located on the side of the first seal 121 away from the receiving cavity 110a. In this scheme, if the first seal 121 is damaged during the use of the fuel supply pump assembly 100, the receiving cavity 110a and the first airtightness testing space 110b are connected through the clearance space 112a or the aforementioned first sealing groove 112b, and fuel can flow to the first airtightness testing space 110b, causing a change in the air pressure within the first airtightness testing space 110b.

[0101] The main body 111 may be provided with multiple first airtightness detection spaces 110b. A connecting groove 111a is provided at one end of the main body 111 near the cover portion 112, and at least a portion of the first airtightness detection spaces 110b are connected through the connecting groove 111a. Figure 5 and Figure 6 In a specific implementation of the example, the connecting groove 111a is annular and connected to one end of the plurality of first airtightness detection spaces 110b near the cover portion 112. This arrangement facilitates the rapid response of the air pressure change of the first airtightness detection space 110b to the fuel leakage in the receiving cavity 110a, and can connect the plurality of first airtightness detection spaces 110b, so that the air pressure of the plurality of first airtightness detection spaces 110b changes in a coordinated manner. Therefore, fewer sensors and other components for detecting air pressure changes in the first airtightness detection space 110b can be set.

[0102] The receiving cavity 110a may have a second opening 110d at the end of the main body 111 away from the cover portion 112 for fuel to enter or exit. The end of the main body 111 away from the cover portion 112 may also be connected to other components to close the receiving cavity 110a, or the main body 111 may have a channel communicating with the receiving cavity 110a for introducing fuel into the receiving cavity 110a, or a channel for discharging fuel from the receiving cavity 110a. Sealing components may be further provided between the main body 111 and these components to prevent fuel leakage. In some embodiments, the sealing assembly 120 further includes a second seal 122.

[0103] The second seal 122 is fixedly disposed at the end of the main body 111 away from the cover 112. Specifically, the second seal 122 can be disposed, for example, between the main body 111 and the aforementioned component connected to the end of the main body 111 away from the cover 112, to prevent fuel leakage from the receiving cavity 110a. Figure 3 , Figure 5 , Figure 6 and Figure 7 In a specific embodiment of the example, the end of the main body 111 away from the cover 112 has a second sealing groove 111b, and the second seal 122 is at least partially embedded in the second sealing groove 111b to position and install the second seal 122 on the main body 111.

[0104] Matching the second seal 122, the first airtightness detection space 110b has a first opening 110c at the end of the main body 111 away from the cover 112. The first opening 110c is located on the periphery of the second seal 122, and the second opening 110d is located on the inner periphery of the second seal 122. That is, the second seal 122 separates the first opening 110c and the second opening 110d. In this way, when the second seal 122 is damaged and the seal fails, the fuel in the receiving cavity 110a flows to the first opening 110c, causing a change in the air pressure in the first airtightness detection space 110b.

[0105] It is understandable that by connecting the first airtightness detection space 110b to the opposite ends of the main body 111, airtightness detection is performed in the main or even the only two areas of the housing 110 where fuel leakage may occur, ensuring comprehensive and timely detection of gas leaks.

[0106] Based on the scheme of setting multiple first airtightness testing spaces 110b, an end face groove 111c can also be provided at the end of the main body 111 away from the cover 112. The end face groove 111c connects to the second openings 110d of the multiple first airtightness testing spaces 110b, so that the multiple first airtightness testing spaces 110b are connected through the end face groove 111c. (Refer to...) Figure 4 As shown, the end face groove 111c can be, for example, an annular groove.

[0107] A seal can be further formed outside the first airtightness detection space 110b, which on the one hand prevents the detection gas from leaking, and on the other hand, after the fuel leaks into the first airtightness detection space 110b, it also helps to prevent the fuel from flowing to the external environment where the fuel supply pump group 100 is located, thereby further improving the airtightness of the fuel supply pump group 100.

[0108] In the specific plan, refer to Figure 3 and Figure 4 As shown, for example, by utilizing a portion of the cover portion 112 located outside the end face of the main body portion 111, the cover portion 112 can be used to close the communication groove 111a to isolate the communication groove 111a from the external environment where the fuel supply pump assembly 100 is located.

[0109] A first sealing ring 113 may be provided between the cover portion 112 and the main body portion 111. The first sealing ring 113 is located around the communicating groove 111a to form a seal for the first airtightness detection space 110b. The number of first sealing rings 113 can be flexibly set, and the present invention does not limit this.

[0110] A second sealing ring 114 can be further provided between the cover portion 112 and the piston member 130 to seal the aforementioned clearance space 112a. The cover portion 112 has a fuel passage 112d communicating with the first airtightness detection space 110b. One end of the fuel passage 112d is connected to the clearance space 112a, that is, the fuel passage 112d is connected between the clearance space 112a and the first airtightness detection space 110b. The end of the fuel passage 112d communicating with the clearance space 112a is located between the first seal member 121 and the second sealing ring 114, so that the second sealing ring 114 can prevent the detection gas or fuel in the first airtightness detection space 110b from leaking from the clearance space 112a, further improving the airtightness of the fuel supply pump assembly 100. The number of second sealing rings 114 can be flexibly set, and the present invention does not limit this.

[0111] Reference Figure 3 and Figure 8As shown, a third sealing ring 115 can also be provided on the cover portion 112. The third sealing ring 115 is located on the side of the second sealing ring 114 away from the first sealing ring 113, and is located between the cover portion 112 and the housing portion 110. Correspondingly, the cover portion 112 can have a lubrication hole 112c. One end of the lubrication hole 112c communicates with the clearance space 112a, and the end of the lubrication hole 112c communicating with the clearance space 112a is located between the second sealing ring 114 and the third sealing ring 115. The third sealing ring 115 provides a sealing effect for the lubrication hole 112c, which can be used to inject lubricant into the clearance space 112a, providing lubrication for the piston component 130 and the cover portion 112, reducing the possibility of wear on the second sealing ring 114, thereby further improving the sealing performance of the fuel supply pump assembly 100.

[0112] In a specific embodiment, a fourth sealing ring 116 can be provided at the end of the main body 111 away from the cover 112. The fourth sealing ring 116 is specifically located around the second opening 110d, that is, the second opening 110d is located between the second sealing member 122 and the fourth sealing ring 116. In a more specific embodiment, the aforementioned end face groove 111c is located between the second sealing member 122 and the fourth sealing ring 116, and the fourth sealing ring 116 can be used to seal the second opening 110d.

[0113] During the movement of the piston 130 relative to the housing 110, there is friction between it and some components in contact with it. For example, if the piston 130 is in direct contact with the inner wall of the housing 110 forming the receiving cavity 110a, the inner wall of the receiving cavity 110a may be easily worn, which will affect the pressurization effect on the fuel. The present invention also provides some ideas to ensure the pressurization effect.

[0114] In some embodiments, refer to Figure 3 and Figure 4 As shown, the fuel supply pump assembly 100 also includes a filling assembly 140. The filling assembly 140 is disposed within the receiving cavity 110a and located between the main body 111 and the piston member 130 to form a seal between them. The portion of the filling assembly 140 in contact with the main body 111 and the piston member 130 is made of a flexible material such as rubber or polytetrafluoroethylene. The filling assembly 140 isolates the main body 111 and the piston member 130, preventing contact between them and avoiding wear on the inner wall of the receiving cavity 110a, thus allowing the fuel within the receiving cavity 110a to be properly pressurized. The fuel within the receiving cavity 110a also provides lubrication to the filling assembly 140, making it less prone to wear.

[0115] As an example of a specific solution, the filling assembly 140 includes a first filling member 141 and a second filling member 142 that abut against each other. One of the first filling member 141 and the second filling member 142 is provided with a fitting groove 141a. The other of the first filling member 141 and the second filling member 142 is provided with a fitting protrusion 142a. The fitting protrusion 142a is fitted into the fitting groove 141a, that is, the parts of the first filling member 141 and the second filling member 142 that are in contact with each other form a mutually fitting connection relationship. Figure 3 and Figure 4 In the specific implementation of the example, the first filler 141 and the second filler 142 are arranged sequentially along the sliding direction of the piston 130. Compared to a single filler solution, after the first filler 141 or the second filler 142 wears out, only the worn first filler 141 or the second filler 142 needs to be replaced, reducing maintenance costs. Through the mutual interlocking of the first filler 141 and the second filler 142, even if the movement of the piston 130 causes the first filler 141 or the second filler 142 to shift or creep, gaps can be avoided between the first filler 141 and the second filler 142, thereby reducing the possibility of fuel flowing between the first filler 141 and the second filler 142.

[0116] In some embodiments, the filling assembly 140 and the piston 130 divide the receiving cavity 110a into a pressurizing cavity 110e and a lubrication cavity 110f. The pressurizing cavity 110e, specifically used for pressurizing fuel, is located at the end of the filling assembly 140 away from the cover portion 112. When pressurizing fuel, the piston 130 moves, reducing the volume of the pressurizing cavity 110e and compressing the fuel within it, thereby pressurizing the fuel. The lubrication cavity 110f is located between the cover portion 112 and the filling assembly 140, with the cover portion 112 positioned between the first airtightness detection space 110b and the lubrication cavity 110f. The lubrication cavity 110f can be filled with a substance used for lubrication (such as a lubricant).

[0117] Fuel can also be partially filled into the lubrication cavity 110f for lubrication. Specifically, the main body 111 is provided with a lubrication channel 110h. The lubrication channel 110h communicates with the lubrication cavity 110f, and the lubrication channel 110h has a third opening 110g at the end of the main body 111 away from the cover portion 112. The third opening 110g is located inside the second seal 122, that is, the third opening 110g communicates with the first opening 110c at least in some usage scenarios. For example, when fuel is delivered to the receiving cavity 110a, the communication between the third opening 110g and the first opening 110c allows part of the fuel to pass from the lubrication channel 110h to the lubrication cavity 110f, thereby using this part of the fuel to provide lubrication for the piston.

[0118] For the fuel supply pump assembly 100, it is often necessary to supply fuel to the engine and other equipment quickly. At this time, multiple housings 110 can be set up, and the number of corresponding piston parts 130 corresponds one-to-one with the housings 110. Thus, multiple piston parts 130 and housings 110 cooperate to pressurize the fuel simultaneously or at different times, thereby improving the efficiency of fuel pressurization.

[0119] The present invention also provides some specific solutions for how to supply fuel to the receiving cavity 110a or how to discharge the pressurized fuel from the receiving cavity 110a.

[0120] In some embodiments, the fuel supply pump assembly 100 further includes: an adapter block 150, a first check valve 160, and a second check valve 170.

[0121] The adapter block 150 is fixedly connected to the housing 110. The adapter block 150 has an inlet channel 150a and an outlet channel 150b. The inlet channel 150a is connected to a fuel source, for example, via a pipe. As an example, the inlet channel 150a can be connected to a pump body for pumping methanol via a pipe, so that the pump body can deliver fuel to the inlet channel 150a when it is operating. The outlet channel 150b is ultimately connected to equipment such as an engine via a pipe for delivering pressurized fuel to the engine or similar equipment.

[0122] It is understood that the adapter block 150 can at least be used as a component fixed to one end of the main body 111 away from the cover 112 for sealing the receiving cavity 110a and the first airtightness detection space 110b, and the aforementioned second seal 122 and third sealing ring 115 can both be disposed between the main body 111 and the adapter block 150.

[0123] The first one-way valve 160 is disposed between the feed channel 150a and the receiving cavity 110a. When it is open, it connects the feed channel 150a and the receiving cavity 110a, thereby allowing fuel in the feed channel 150a to flow to the receiving cavity 110a. When it is closed, it blocks the feed channel 150a and the receiving cavity 110a, preventing fuel from flowing from the receiving cavity 110a to the feed channel 150a.

[0124] The second one-way valve 170 is disposed between the receiving cavity 110a and the discharge channel 150b. When it is open, it connects the receiving cavity 110a and the discharge channel 150b, thereby allowing fuel in the receiving cavity 110a to flow to the discharge channel 150b. When it is closed, it blocks the discharge channel 150b and the receiving cavity 110a, preventing fuel from flowing back from the discharge channel 150b to the receiving cavity 110a.

[0125] By cooperating with the adapter block 150, the first one-way valve 160, and the second one-way valve 170, the intake and exhaust of the receiving cavity 110a can be achieved. The specific structure and principle of the first one-way valve 160 and the second one-way valve 170 to achieve unidirectional communication will not be elaborated or limited here.

[0126] The adapter block 150 also includes a feed inlet 150c. The feed inlet 150c is formed at one end of the feed channel 150a. The feed inlet 150c is suitable for connection to a pipeline, allowing fuel in the pipeline to be transported from the feed inlet 150c into the feed channel 150a. The connection between the pipeline and the feed inlet 150c often requires sealing to prevent fuel leakage. Correspondingly, the adapter block 150 may also include a second airtightness detection space 150d. The second airtightness detection space 150d is used to contain detection gas, allowing detection gas to also be introduced into the adapter block 150. The second airtightness detection space 150d has a fourth opening 150e at the feed inlet 150c, and the fourth opening 150e connects to the feed channel 150a through the feed inlet 150c.

[0127] Using this scheme, after connecting the pipeline to the feed inlet 150c, the fourth opening 150e can be separated from the feed channel 150a by the pipeline. When the seal between the pipeline and the feed inlet 150c fails, the fuel in the feed channel 150a or the pipeline enters the second airtightness detection space 150d through the feed inlet 150c and the fourth opening 150e. By detecting the change in air pressure in the second airtightness detection space 150d, it can be determined whether there is a leak between the pipeline connected to the feed inlet 150c and the adapter block 150, so as to further improve the safety of the fuel supply pump set 100.

[0128] The second airtightness testing space 150d can be configured to be connected to the first airtightness testing space 110b, as shown in the reference. Figure 9 , Figure 10 , Figure 11 and Figure 15 As shown, in the scheme where an end face groove 111c is formed on the housing 110, the second airtightness detection space 150d can be configured such that an opening is formed on the surface of the adapter block 150 near the main body 111, and the opening is connected to the end face groove 111c, so that the second airtightness detection space 150d is connected to the first airtightness detection space 110b. With this scheme, the air pressure change between the second airtightness detection space 150d and the first airtightness detection space 110b can be detected by the same sensor.

[0129] In some embodiments, the adapter block 150 further includes a discharge port 150f and a third airtightness detection space 150g. The discharge port 150f is formed at one end of the discharge channel 150b; the inlet port 150c is adapted to connect to another pipe so that fuel in the discharge channel 150b is delivered from the inlet port 150c into the pipe. Correspondingly, the adapter block 150 also includes a third airtightness detection space 150g. The third airtightness detection space 150g is also adapted to contain the detection gas. The third airtightness detection space 150g has a fifth opening 150h at the discharge port 150f, and the fifth opening 150h communicates with the discharge channel 150b through the discharge port 150f.

[0130] After connecting the pipeline to the discharge port 150f, the fifth opening 150h can be separated from the discharge channel 150b by the pipeline. When the seal between the pipeline and the discharge port 150f fails, the fuel in the discharge channel 150b or the pipeline enters the third airtightness detection space 150g through the discharge port 150f and the fifth opening 150h. By detecting the change in air pressure in the second airtightness detection space 150d, it can be determined whether there is a leak between the pipeline connected to the discharge port 150f and the adapter block 150.

[0131] Understandably, due to the presence of the first one-way valve 160, when pressurizing the fuel in the receiving cavity 110a, the feed channel 150a is disconnected from the receiving cavity 110a, effectively sealing the receiving cavity 110a with the first one-way valve 160. If the first seal 121 is damaged, causing the seal between the adapter block 150 and the main body 111 to fail, the fuel in the feed channel 150a will leak into the first airtight detection space 110b. For the discharge channel 150b, where the fuel pressure is relatively high, the second airtight detection space 150d and the third airtight detection space 150g can be used to detect leaks at lower and higher pressures, respectively. Since sensors and other devices used to detect pressure changes often have a range, the independent design of the third airtight detection space 150g, separate from the second airtight detection space 150d and the first airtight detection space 110b, allows for flexible selection of sensor specifications based on different fuel parameters, ensuring detection accuracy. The second airtightness testing space 150d, the first airtightness testing space 110b, and the third airtightness testing space 150g can be respectively introduced with different pressures of testing gas that match the pressure of the fuel, so as to detect whether the seal has failed more quickly.

[0132] The aforementioned pipes connecting the inlet port 150c and the outlet port 150f can be in the form of a double-walled pipe, that is, the fuel supply device 10 integrating the fuel supply pump group 100 also includes a double-walled pipe 180. In related technologies, a vacuum channel is often set outside the fuel delivery channel 181a inside the double-walled pipe to ensure safety. The present invention, based on the use of a detection gas, can introduce a detection gas into the double-walled pipe 180, so that fuel leakage at the double-walled pipe 180 can be detected in time, further improving the safety of use.

[0133] In the specific plan, refer to Figure 12 The diagram shows the fit between the double-walled tube 180 and the discharge port 150f. This fit can also be used between the double-walled tube 180 and the discharge port 150f, but will not be elaborated here.

[0134] exist Figure 12 In the specific implementation of the example, the double-walled tube 180 is fixed to the discharge port 150f by a threaded connection. The double-walled tube 180 includes an outer tube 182 and an inner tube 181 passing through the outer tube 182. The inner tube 181 has a conveying channel 181a, which communicates with the discharge channel 150b. A protective channel 182a is provided between the outer tube 182 and the inner tube 181, that is, the protective channel 182a is located outside the conveying channel 181a. The protective channel 182a communicates with the third airtight detection space 150g, allowing detection gas to pass through the protective channel 182a.

[0135] In a more specific embodiment, one end of the inner tube 181 is inserted into the discharge port 150f, forming a surface contact with the discharge port 150f. The wall surface in contact with the inner tube 181 and the discharge port 150f is a tapered surface 180a. A threaded sleeve 183 is fitted onto the end of the outer tube 182 near the adapter block 150. This threaded sleeve 183 forms a threaded connection with the discharge port 150f. The threaded sleeve 183 is fixed to the inner tube 181, for example, by welding, or by other means to form a rotatable connection with the inner tube 181, preventing relative sliding between the inner tube 181 and the threaded sleeve 183. During the screwing of the threaded sleeve 183 into the connecting tube, it causes the inner tube 181 to come into tight contact with the discharge port 150f, ensuring a seal between the inner tube 181 and the discharge port 150f.

[0136] A corresponding channel can be formed on the threaded sleeve 183 to connect the fifth opening 150h and the protective channel 182a, thus connecting the third airtightness detection space 150g and the protective channel 182a. A fifth sealing ring 184 is provided between the threaded sleeve 183 and the discharge port 150f, and a sixth sealing ring 185 is provided between the threaded sleeve 183 and the outer tube 182 to prevent fuel or detection gas leakage. A bushing 186 is provided between the threaded sleeve 183 and the inner tube 181. The bushing 186 can be made of polyester material, rubber material, etc., which helps to limit the inner tube 181 at the threaded sleeve 183 to prevent the inner tube 181 from shaking, while also providing a sealing effect between the threaded sleeve 183 and the inner tube 181.

[0137] The connection between the double-walled pipe 180 and the engine or other equipment can also be similar to that between the double-walled pipe 180 and the discharge port 150f. In the above scheme, when the double-walled pipe 180 is used to transport fuel, detection gas is introduced into the protection channel 182a. Compared with the scheme of forming a vacuum environment around the fuel, it is possible to quickly detect whether fuel leakage has occurred.

[0138] Reference Figure 13 and Figure 14 As shown, the feed port 150c and the discharge port 150f can be respectively located near opposite ends of the adapter block 150 to distinguish the relatively high-pressure side and the relatively low-pressure side of the fuel. The opening direction of the feed port 150c on the surface of the adapter block 150 is different from that of the discharge port 150f on the surface of the adapter block 150, that is, the double-walled tube 180 is connected to two non-parallel surfaces of the adapter block 150. The feed channel 150a and the discharge channel 150b can be configured to extend at least partially along two parallel straight lines to reduce the pressure loss when the fuel is transported within the adapter block 150, and also to facilitate the opening of holes in the adapter block 150 to form the aforementioned feed channel 150a and discharge channel 150b.

[0139] Based on the above settings, the sixth opening 150i formed on the surface of the adapter block 150 when forming the discharge channel 150b is offset from the discharge interface 150f. In actual use, the sixth opening 150i can be sealed by fixing a plug at the sixth opening 150i. Considering that fuel leakage may also occur at the plug, a side channel 150j connecting the third airtightness detection space 150g and the sixth opening 150i can be set. During normal use, the side channel 150j is blocked from the discharge channel 150b by the plug. When the seal between the plug and the sixth opening 150i fails, the side channel 150j connects with the discharge channel 150b, causing a change in the air pressure in the third airtightness detection space 150g. By detecting the air pressure in the third airtightness detection space 150g, it can be determined whether there is a fuel leak.

[0140] exist Figure 16 and Figure 17In the specific implementation of the example, the side branch channel 150j is connected to the discharge interface 150f, so that the side branch channel 150j is connected to the third airtightness detection space 150g through the discharge interface 150f.

[0141] In some embodiments, refer to Figure 13 , Figure 16 and Figure 18 As shown, the adapter block 150 also includes a side channel 150k and an accumulator connection port 150l. The side channel 150k communicates with the discharge channel 150b. The accumulator connection port 150l is used to connect the accumulator 16, meaning that the accumulator 16 can be integrated into the fuel supply pump assembly 100. The accumulator connection port 150l communicates with the side channel 150k, allowing the accumulator 16 to hold the pressurized fuel. The accumulator 16 is configured to store and release energy to stabilize the pressure of the fuel in the discharge channel 150b.

[0142] The addition of accumulator 16 increases the potential fuel leakage points on adapter block 150. A third airtightness detection space 150g can be defined as being connected to a bypass channel 150k via accumulator connection port 150l. During normal operation of accumulator 16, the connector between accumulator 16 and accumulator connection port 150l isolates the third airtightness detection space 150g and bypass channel 150k. If the seal between the connector and accumulator connection port 150l fails, fuel enters the third airtightness detection space 150g from accumulator connection port 150l. Fuel leakage is determined by detecting pressure changes within the third airtightness detection space 150g. The fit between the connector of accumulator 16 and accumulator connection port 150l can be similar to the conical fit between the inner tube 181 and the discharge port 150f, ensuring the airtightness of the connection between accumulator 16 and adapter block 150.

[0143] Secondly, referring to Figure 1 As shown, some embodiments of the present invention also provide a fuel supply device 10 for supplying fuel to gas-using equipment. The fuel supply device 10 includes the aforementioned fuel supply pump assembly 100. The fuel supply device 10 has the beneficial effects of the aforementioned fuel supply pump assembly 100, which will not be elaborated further here.

[0144] The fuel supply device 10 can be integrated into a fuel supply system for use in order to supply fuel to equipment such as engines.

[0145] Referring to the foregoing description, the fuel supply device 10 also includes the aforementioned double-walled pipe 180, so as to deliver fuel to the fuel supply pump assembly 100, or to deliver fuel pressurized by the fuel supply pump assembly 100 to equipment such as an engine.

[0146] In the specific plan, refer to Figure 1As shown, the fuel supply device 10 may further include a drive motor 11, a lubricant supply pump 13, a heat exchanger 14, a filter 15, and other structures. The drive motor 11 is adapted to be connected to the piston 130 via a transmission connection to drive the piston 130 to move relative to the housing 110. The lubricant supply pump 13 is adapted to pump lubricating oil to the housing 110, the drive motor 11, and the transmission mechanism connecting the piston 130 and the drive motor 11 during operation.

[0147] The heat exchanger 14 is connected via pipes to the housing 110, the drive motor 11, and the transmission structure connecting the drive motor 11 and the piston 130, allowing lubricating oil to flow to the heat exchanger 14. The heat exchanger 14 is suitable for cooling the lubricating oil by means of water cooling or air cooling. As a specific example, the heat exchanger 14 is provided with a channel for cooling water to pass through, allowing the cooling water to exchange heat with the lubricating oil at the heat exchanger 14, thereby cooling the lubricating oil.

[0148] Filter 15 is connected, for example, to the inlet or outlet of the heat exchanger 14 for filtering impurities in the lubricating oil.

[0149] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A fuel supply pump assembly (100), characterized in that, include: The housing (110) is provided with a receiving cavity (110a) for receiving fuel; A sealing assembly (120), connected to the housing (110), is used to seal the receiving cavity (110a); The piston (130) is movably disposed within the receiving cavity (110a); The housing (110) is further provided with a first airtight detection space (110b) for accommodating the detection gas; the sealing assembly (120) is disposed between the first airtight detection space (110b) and the accommodating cavity (110a) to isolate the first airtight detection space (110b) and the accommodating cavity (110a); The sealing assembly (120) includes: A first seal (121) is disposed between the piston (130) and the housing (110); The housing (110) includes: The main body (111) has the receiving cavity (110a) formed thereon; A cover portion (112) is fixedly disposed at one end of the main body portion (111), and the cover portion (112) has a clearance space (112a) communicating with the receiving cavity (110a); Wherein, at least a portion of the piston member (130) passes through the clearance space (112a); the first sealing member (121) is disposed in the clearance space (112a) and is located between the cover portion (112) and the piston member (130); at least a portion of the first airtightness detection space (110b) is located on the side of the clearance space (112a) away from the receiving cavity (110a) and communicates with the clearance space (112a); the first airtightness detection space (110b) is located on the side of the first sealing member (121) away from the receiving cavity (110a).

2. The fuel supply pump assembly (100) according to claim 1, characterized in that, The main body (111) is provided with a plurality of first airtightness detection spaces (110b); the main body (111) is provided with a connecting groove (111a) at one end near the cover (112); at least a portion of the first airtightness detection spaces (110b) are connected through the connecting groove (111a).

3. The fuel supply pump assembly (100) according to claim 2, characterized in that, The fuel supply pump assembly (100) also includes: The first sealing ring (113) is located between the cover portion (112) and the main body portion (111); The first sealing ring (113) is located on the periphery of the connecting groove (111a) to form a seal for the first airtightness detection space (110b).

4. The fuel supply pump assembly (100) according to claim 1, characterized in that, The fuel supply pump assembly (100) also includes: A second sealing ring (114) is disposed between the cover portion (112) and the piston member (130) to seal the clearance space (112a); The cover portion (112) has the following features: A fuel passage (112d) is connected between the clearance space (112a) and the first airtightness detection space (110b); The fuel passage (112d) is located between the first seal (121) and the second sealing ring (114) at one end, which connects to the clearance space (112a).

5. The fuel supply pump assembly (100) according to claim 1, characterized in that, The sealing assembly (120) further includes: The second sealing element (122) is fixedly disposed at one end of the main body (111) away from the cover (112); The first airtightness detection space (110b) has a first opening (110c) at the end of the main body (111) away from the cover (112); the receiving cavity (110a) has a second opening (110d) at the end of the main body (111) away from the cover (112); the first opening (110c) is located on the periphery of the second seal (122); the second opening (110d) is located on the inner periphery of the second seal (122).

6. The fuel supply pump assembly (100) according to claim 5, characterized in that, The fuel supply pump assembly (100) also includes: A filling assembly (140) is disposed within the receiving cavity (110a) and located between the main body (111) and the piston member (130) to form a seal between the main body (111) and the piston member (130).

7. The fuel supply pump assembly (100) according to claim 6, characterized in that, The filling assembly (140) and the piston (130) divide the receiving cavity (110a) into a pressurizing cavity (110e) and a lubrication cavity (110f); wherein the pressurizing cavity (110e) is located at the end of the filling assembly (140) away from the cover portion (112); the lubrication cavity (110f) is located between the cover portion (112) and the filling assembly (140), and the cover portion (112) is disposed between the first airtightness detection space (110b) and the lubrication cavity (110f).

8. The fuel supply pump assembly (100) according to claim 7, characterized in that, The main body (111) is provided with: The lubrication channel (110h) is connected to the lubrication cavity (110f); The lubrication channel (110h) has a third opening (110g) at one end of the main body (111) away from the cover (112); the third opening (110g) is located in the inner circumference of the second seal (122).

9. The fuel supply pump assembly (100) according to any one of claims 1 to 8, characterized in that, The fuel supply pump assembly (100) also includes: An adapter block (150) is fixedly connected to the housing (110), and the adapter block (150) has a feed channel (150a) and a discharge channel (150b); A first check valve (160) is disposed between the feed channel (150a) and the receiving cavity (110a); A second one-way valve (170) is disposed between the receiving cavity (110a) and the discharge channel (150b).

10. The fuel supply pump assembly (100) according to claim 9, characterized in that, The adapter block (150) is also provided with: The feed inlet (150c) is located at one end of the feed channel (150a); A second airtight detection space (150d) is used to contain the detection gas; The second airtightness detection space (150d) has a fourth opening (150e) at the feed inlet (150c); the fourth opening (150e) is connected to the feed channel (150a) through the feed inlet (150c).

11. The fuel supply pump assembly (100) according to claim 10, characterized in that, The second airtightness testing space (150d) is connected to the first airtightness testing space (110b).

12. The fuel supply pump assembly (100) according to claim 10, characterized in that, The adapter block (150) is further provided with: The discharge port (150f) is located at one end of the discharge channel (150b); The third airtight detection space (150g) is used to contain the detection gas. The third airtight detection space (150g) has a fifth opening (150h) at the discharge port (150f). The fifth opening (150h) is connected to the discharge channel (150b) through the discharge port (150f).

13. The fuel supply pump assembly (100) according to claim 12, characterized in that, The adapter block (150) is further provided with: A side channel (150k) is connected to the discharge channel (150b); An accumulator connection port (150l) is used to connect an accumulator (16), and the accumulator connection port (150l) is connected to the side channel (150k); The third airtightness testing space (150g) is connected to the side channel (150k) through the accumulator connection port (150l).

14. A fuel supply device (10) for supplying fuel to gas-consuming equipment, characterized in that, Includes the fuel supply pump assembly (100) as described in any one of claims 1 to 13.

15. The fuel supply device (10) according to claim 14, characterized in that, The fuel is configured as methanol; The detection gas is configured to be at least one of nitrogen and inert gas.

Images