A diesel pump with increased preheating efficiency in cold environments

Abstract

The application discloses a diesel pump capable of increasing preheating efficiency in a cold environment, which comprises a diesel pump body, wherein the diesel pump body is in transmission connection with an oil return device and an oil scattering device respectively; the diesel pump body comprises a first gear, the first gear is in transmission connection with an engine, the first gear is in transmission connection with a gear shaft, the gear shaft is in transmission connection with a second partition plate, the second partition plate is in rotary connection with an end portion of a camshaft arranged in an annular and equidistant mode, an outer ring of the camshaft is in contact with one side of a pressing plate, the other side of the pressing plate is connected with a reset plate, one end of the reset plate is connected with a back pressure rod arranged in a symmetrical mode, the other end of the back pressure rod is in sliding connection with a back pressure hole of a piston sleeve, a back pressure elastic element is sleeved on an outer ring of the back pressure rod, and one end of the back pressure elastic element is in contact with the reset plate. The diesel pump provided by the application has the advantages of energy-saving driving, improved preheating efficiency and reduced low-temperature starting failure rate.

Description

Technical Field

[0001] This invention relates to the field of diesel engine technology, specifically to a diesel pump that increases preheating efficiency in cold environments. Background Technology

[0002] Patent application CN202010404169.9 discloses a fuel system preheating system for a diesel engine. The diesel engine includes a diesel tank, diesel pipelines, a diesel filter, and a fuel pump. An electronic pressure pump is installed on the diesel filter. Heating elements are installed inside the diesel tank, inside the diesel pipelines, and outside the diesel filter. The heating elements and the electronic pressure pump are all connected to a control switch, which is connected to a power source. The preheating method is also disclosed: first, the diesel fuel in the diesel tank, diesel filter, first pipeline, and second pipeline is preheated. When the waxy diesel fuel in the oil-water separator sedimentation cup turns to a normal color, heating is stopped. The control switch is then switched, and the electronic pressure pump starts working, drawing the preheated diesel fuel to the fuel pump. The fuel pump then pumps the diesel fuel back to the diesel tank, circulating the heating process. This effectively solves the problem of difficult diesel engine starting and also increases the service life of the fuel pump by adding a fuel filter, thus reducing costs.

[0003] In the prior art, including the aforementioned patents, the difficulty in starting a diesel engine fuel pump under cold conditions is mainly caused by the following reasons. First, the diesel fuel condenses due to low temperature. When the ambient temperature is lower than the freezing point of diesel fuel, the diesel fuel will form wax crystals that block the fuel line, resulting in interruption of fuel supply and a significant decrease in fluidity. The solution is to heat the fuel line, but this method still results in slow efficiency. The diesel fuel still needs to be heated for a long time to reduce viscosity and improve flowability. At the same time, under cold conditions, the increased lubrication resistance of the diesel pump will significantly affect the preheating efficiency.

[0004] Therefore, a diesel pump that increases preheating efficiency in cold environments is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a diesel pump that increases preheating efficiency in cold environments, thereby solving the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a diesel pump for increasing preheating efficiency in cold environments, wherein the main body of the diesel pump is connected to a return oil device and a distribution oil device respectively.

[0007] The diesel pump body includes a first gear, which is driven by the engine and a gear shaft. The gear shaft is driven by a second partition, which is rotatably connected to the end of a camshaft arranged in annular intervals. The outer ring of the camshaft contacts one side of a pressure plate, and the other side of the pressure plate is connected to a reset plate. The reset plate is connected to one end of a symmetrically arranged back pressure rod, and the other end of the back pressure rod is slidably connected to a back pressure hole in a piston sleeve. A back pressure elastic element is sleeved on the outer ring of the back pressure rod, and one end of the back pressure elastic element contacts the reset plate, while the other end contacts the piston sleeve. The middle position of the reset plate is connected to an oil delivery piston, which is slidably connected to a piston hole. The piston hole is connected to multiple oil distribution pipes.

[0008] Preferably, one side of the second partition is connected to one end of a connecting column arranged in a ring at equal intervals, and the other end of the connecting column is connected to the first partition. The outer rings of the first and second partitions are rotatably connected to the inner ring of the protective shell. The protective shell is connected to the piston sleeve, and the first and second partitions are connected to the oil return device.

[0009] Preferably, the oil return device includes a second gear, which is drivenly connected to the first gear and to the rotating rod sleeve. The rotating rod sleeve rotates and communicates with one end of the oil return pipe. The rotating rod sleeve has multiple through slots at equal intervals. The outer ring of the rotating rod sleeve is connected to one end of a centrifugal blade arranged in annular and equidistant arrangement. The outer ring of the centrifugal blade is in rotatable contact with the inner ring of the centrifugal sleeve. The centrifugal sleeve is connected and communicates with the protective shell.

[0010] Preferably, the other end of the oil return pipe is connected to the bottom of the protective shell away from the second gear.

[0011] Preferably, the oil dispersing device includes a third gear, which is drivenly connected to one end of a connecting rod. The other end of the connecting rod passes through the housing and is drivenly connected to the inner column. An outer sleeve column is provided on the outer ring of the inner column. A reversing structure is provided between the outer sleeve column and the inner column. The outer ring of the outer sleeve column is connected to one end of a mesh plate arranged in annular and equidistant. The outer ring of the mesh plate is rotatably connected to the inner ring of the housing. The housing is connected to an oil inlet pipe and an oil delivery pipe, respectively. The oil delivery pipe is connected to a piston hole, and the oil inlet pipe is connected to an oil tank.

[0012] Preferably, the reversing structure includes a rotating block, one end of which is rotatably connected to both sides of the inner column through a rotating groove, one side of which is connected to one end of a reset elastic element, the other end of which is connected to the rotating groove, and the other end of which is engaged with a slot in the outer column. The outer column passes through the housing and is connected to the output end of the drive motor, and the drive motor is connected to the piston sleeve.

[0013] Preferably, the outer rings of the oil distribution pipe, oil return pipe, protective shell, oil inlet pipe, and oil delivery pipe are all wrapped with electric heating tape.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the diesel pump that increases preheating efficiency in cold environments is reasonable and has the following advantages:

[0015] The oil return device and the oil distribution device achieve dual-efficiency energy-saving drive through the linkage of the diesel pump body's kinetic energy: the oil return device constructs a closed-loop lubrication system, effectively suppressing the problem of increased lubrication resistance caused by the surge in oil viscosity under low-temperature conditions by forcibly circulating the lubricating oil in the pump body, ensuring uniform distribution of the lubricating medium; the synchronously operating oil distribution device uses rotary crushing to quickly break down the diesel wax crystal network structure under frozen oil conditions, and achieves viscosity gradient control in conjunction with preheating, which is more efficient than the traditional single preheating scheme, further reducing the failure rate of low-temperature start-up; the flow channel formed by the first baffle, the second baffle, the connecting column and the protective shell allows the lubricating oil to circulate in the camshaft area, ensuring that the lubricating oil in the camshaft area and any metal debris generated are discharged into the protective shell, and then lubricating oil is drawn from other areas of the protective shell, ensuring the utilization rate of the lubricating oil and extending the service life of the lubricating oil.

[0016] When the engine fails to start in cold conditions, the control system will instruct the fuel injectors to open briefly, pre-injecting a small amount of diesel fuel into the combustion chamber. The drive motor will then drive the outer sleeve column to rotate forward, breaking the diesel fuel into fine particles through the rotating mesh plate. Under frozen conditions, this quickly disintegrates the diesel fuel wax crystal network structure, thereby improving the starting success rate. Once the engine starts successfully, the drive motor will stop, and the first gear will drive the third gear, connecting rod, and inner column to rotate forward. The drive motor will then continue to drive the mesh plate to rotate and break up the diesel fuel for preheating, thereby further saving energy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the protective shell in this invention;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 for Figure 3 The front view;

[0021] Figure 5 This is a schematic diagram of the oil return device in this invention;

[0022] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0023] Figure 7 This is a schematic diagram of the oil dispersing device in this invention;

[0024] Figure 8This is a cross-sectional view of the housing in this invention;

[0025] Figure 9 for Figure 8 Enlarged view of section B in the middle.

[0026] In the diagram: 1-Diesel pump body, 111-First gear, 112-Protective housing, 113-First partition, 114-Second partition, 115-Connecting column, 116-Camshaft, 117-Pressure plate, 118-Reset plate, 119-Return pressure elastic element, 120-Return pressure rod, 121-Fuel delivery piston, 122-Piston sleeve, 1221-Piston hole, 1222-Return pressure hole, 123-Distributor pipe, 2-Return oil device, 211 - Second gear, 212- Centrifugal sleeve, 214- Rotating rod sleeve, 215- Centrifugal blade, 216- Oil return pipe, 3- Oil dispersing device, 311- Third gear, 312- Connecting rod, 313- Housing, 3131- Mesh plate, 3132- Outer sleeve column, 3133- Inner column, 3134- Reversing structure, 31341- Rotating block, 31342- Reset elastic element, 314- Oil inlet pipe, 315- Oil delivery pipe, 316- Drive motor. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1-9 The present invention provides a technical solution: a diesel pump that increases preheating efficiency in cold environments, comprising a diesel pump body 1, which is connected to a return oil device 2 and an oil distribution device 3 respectively; the return oil device 2 and the oil distribution device 3 achieve dual-effect energy-saving drive by linking the kinetic energy of the diesel pump body 1: the return oil device 2 constructs a closed-loop lubrication system, which effectively suppresses the problem of increased lubrication resistance caused by the surge in oil viscosity under low temperature conditions by forcibly circulating the lubricating oil in the pump body, and ensures uniform distribution of the lubricating medium; the synchronously operating oil distribution device 3 adopts a rotary crusher to quickly break down the diesel wax crystal network structure under frozen oil conditions, and achieves viscosity gradient control in conjunction with preheating, which is more efficient than the traditional single preheating scheme, and further reduces the failure rate of low temperature start-up.

[0029] The diesel pump body 1 includes a first gear 111, which is connected to the engine and a gear shaft. The gear shaft is connected to a second partition 114, which is rotatably connected to the end of a camshaft 116 arranged in annular and equidistant configuration. The outer ring of the camshaft 116 contacts one side of a pressure plate 117, and the other side of the pressure plate 117 is connected to a reset plate 118. The reset plate 118 is connected to one end of a symmetrically arranged back pressure rod 120, and the other end of the back pressure rod 120 is slidably connected to a back pressure hole 1222 in a piston sleeve 122. A back pressure elastic element 119 is sleeved on the outer ring of the back pressure rod 120. One end of the back pressure elastic element 119 contacts the reset plate 118, and the other end of the back pressure elastic element 119 contacts the piston sleeve 122. The middle position of the reset plate 118 is connected to an oil delivery piston 121, which is slidably connected to a piston hole 1221. The piston hole 1221 is connected to multiple oil distribution pipes 123.

[0030] One side of the second partition 114 is connected to one end of a connecting post 115 arranged in a ring at equal intervals. The other end of the connecting post 115 is connected to the first partition 113. The outer rings of the first partition 113 and the second partition 114 are rotatably connected to the inner ring of the protective shell 112. The protective shell 112 is connected to the piston sleeve 122. The first partition 113 and the second partition 114 are connected to the oil return device 2. The first partition 113, the second partition 114, the connecting post 115 and the protective shell 112 form a flow channel, so that the lubricating oil can enter the camshaft 116 area for circulation. This ensures that the lubricating oil in the camshaft 116 area and any metal debris that may be generated are discharged into the protective shell 112. Lubricating oil is then drawn from other areas of the protective shell 112 to ensure the utilization rate of the lubricating oil and extend its service life.

[0031] The oil return device 2 includes a second gear 211, which is driven by the first gear 111 and the rotating rod sleeve 214. The rotating rod sleeve 214 is rotatably connected to one end of the oil return pipe 216. The rotating rod sleeve 214 has multiple through slots at equal intervals. The outer ring of the rotating rod sleeve 214 is connected to one end of the centrifugal blades 215 arranged in annular intervals. The outer ring of the centrifugal blades 215 is in rotatable contact with the inner ring of the centrifugal sleeve 212. The centrifugal sleeve 212 is connected to and communicates with the protective shell 112. The oil return device 2 is driven by the first gear 211 of the diesel pump body 1. A gear 111 drives a second gear 211 to rotate, thereby causing the rotating sleeve 214 and the centrifugal blade 215 to rotate. This allows the return oil pipe 216 to draw lubricating oil from the protective shell 112 into the through groove of the rotating sleeve 214. Under the action of the centrifugal blade 215, the lubricating oil is input into the first partition 113 and the second partition 114, and finally enters the camshaft 116 area to form a circulation, extending the service life of the diesel pump body 1. The other end of the return oil pipe 216 is connected to the bottom of the protective shell 112, which is away from the second gear 211.

[0032] The oil distribution device 3 includes a third gear 311, which is connected to one end of a connecting rod 312. The other end of the connecting rod 312 passes through the housing 313 and is connected to the inner column 3133. An outer sleeve column 3132 is provided on the outer ring of the inner column 3133. A reversing structure 3134 is provided between the outer sleeve column 3132 and the inner column 3133. The outer ring of the outer sleeve column 3132 is connected to one end of a ring-shaped mesh plate 3131. The outer ring of the mesh plate 3131 is rotatably connected to the inner ring of the housing 313. The housing 313 is connected to the oil inlet pipe 314 and the oil delivery pipe 315 respectively. The oil delivery pipe 315 is connected to the piston hole 1221. The oil inlet pipe 314 is connected to the oil tank. The outer rings of the oil distribution pipe 123, the oil return pipe 216, the protective shell 112, the oil inlet pipe 314, and the oil delivery pipe 315 are all wrapped with electric heating tape.

[0033] The reversing structure 3134 includes a rotating block 31341. One end of the rotating block 31341 is rotatably connected to both sides of the inner column 3133 through a rotating groove. One side of the rotating block 31341 is connected to one end of the reset elastic member 31342. The other end of the reset elastic member 31342 is connected to the rotating groove. The other end of the rotating block 31341 is engaged with the outer column 3132 through a slot. The outer column 3132 passes through the housing 313 and is connected to the output end of the drive motor 316. The drive motor 316 is connected to the piston sleeve 122. This structure controls the engine to start when it fails to start in cold conditions. The system will instruct the fuel injector to open briefly, pre-injecting a small amount of diesel fuel into the combustion chamber. The drive motor 316 drives the outer sleeve column 3132 to rotate forward, and the rotating mesh plate 3131 disperses the diesel fuel into fine particles. Under frozen oil conditions, this quickly breaks down the diesel fuel wax crystal network structure, thereby improving the start-up success rate. After a successful start, the drive motor 316 stops rotating forward, and the first gear 111 drives the third gear 311, connecting rod 312, and inner column 3133 to continue driving the mesh plate 3131 to rotate and disperse the diesel fuel for preheating, thereby further saving energy.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A diesel pump for increasing preheating efficiency in cold environments, comprising a diesel pump body (1), characterized in that: The diesel pump body (1) is connected to the oil return device (2) and the oil distribution device (3) respectively; The diesel pump body (1) includes a first gear (111), which is connected to the engine and a gear shaft. The gear shaft is connected to a second partition (114), which is rotatably connected to the end of a camshaft (116) arranged in annular intervals. The outer ring of the camshaft (116) contacts one side of a pressure plate (117), and the other side of the pressure plate (117) is connected to a reset plate (118). The reset plate (118) is connected to one end of a symmetrically arranged back pressure rod (120). The other end of the back pressure rod (120) is slidably connected to the back pressure hole (1222) opened in the piston sleeve (122). The outer ring of the back pressure rod (120) is fitted with a back pressure elastic element (119). One end of the back pressure elastic element (119) is in contact with the reset plate (118), and the other end of the back pressure elastic element (119) is in contact with the piston sleeve (122). The middle position of the reset plate (118) is connected to the oil delivery piston (121). The oil delivery piston (121) is slidably connected to the piston hole (1221). The piston hole (1221) is connected to multiple oil distribution pipes (123). One side of the second partition (114) is connected to one end of a connecting post (115) arranged in a ring at equal intervals. The other end of the connecting post (115) is connected to the first partition (113). The outer ring of the first partition (113) and the second partition (114) is rotatably connected to the inner ring of the protective shell (112). The protective shell (112) is connected to the piston sleeve (122). The first partition (113) and the second partition (114) are connected to the oil return device (2).

2. A diesel pump for increasing preheating efficiency in cold environments according to claim 1, characterized in that: The oil return device (2) includes a second gear (211), which is connected to the first gear (111) in a transmission manner. The second gear (211) is also connected to the rotating rod sleeve (214) in a transmission manner. The rotating rod sleeve (214) is rotatably connected to one end of the oil return pipe (216). The rotating rod sleeve (214) has multiple through slots at equal intervals. The outer ring of the rotating rod sleeve (214) is connected to one end of the centrifugal blades (215) arranged in annular and equidistant arrangement. The outer ring of the centrifugal blades (215) is in rotatable contact with the inner ring of the centrifugal sleeve (212). The centrifugal sleeve (212) is connected to and communicates with the protective shell (112).

3. A diesel pump for increasing preheating efficiency in cold environments according to claim 2, characterized in that: The other end of the return oil pipe (216) is connected to the bottom of the protective shell (112) away from the second gear (211).

4. A diesel pump for increasing preheating efficiency in cold environments according to claim 1, characterized in that: The oil dispersing device (3) includes a third gear (311), which is connected to one end of a connecting rod (312). The other end of the connecting rod (312) passes through the housing (313) and is connected to the inner column (3133). An outer sleeve column (3132) is provided on the outer ring of the inner column (3133). A reversing structure (3134) is provided between the outer sleeve column (3132) and the inner column (3133). The outer ring of the outer sleeve column (3132) is connected to one end of a mesh plate (3131) arranged in a ring at equal intervals. The outer ring of the mesh plate (3131) is rotatably connected to the inner ring of the housing (313). The housing (313) is connected to the oil inlet pipe (314) and the oil delivery pipe (315) respectively. The oil delivery pipe (315) is connected to the piston hole (1221). The oil inlet pipe (314) is connected to the oil tank.

5. A diesel pump for increasing preheating efficiency in cold environments according to claim 4, characterized in that: The reversing structure (3134) includes a rotating block (31341). One end of the rotating block (31341) is rotatably connected to both sides of the rotating groove of the inner column (3133). One side of the rotating block (31341) is connected to one end of the reset elastic member (31342). The other end of the reset elastic member (31342) is connected to the rotating groove. The other end of the rotating block (31341) is engaged with the outer sleeve column (3132) through a slot. The outer sleeve column (3132) passes through the housing (313) and is connected to the output end of the drive motor (316). The drive motor (316) is connected to the piston sleeve (122).

6. A diesel pump for increasing preheating efficiency in cold environments according to claim 1, characterized in that: The outer rings of the oil distribution pipe (123), oil return pipe (216), protective shell (112), oil inlet pipe (314), and oil delivery pipe (315) are all wrapped with electric heat tracing tape.

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