Diesel pump capable of improving preheating efficiency in cold environment

Abstract

The invention discloses a diesel pump capable of increasing preheating efficiency in a cold environment. The diesel pump comprises a diesel pump body which is in transmission connection with an oil return device and an oil dispersing device. 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 rotationally connected with the ends of cam shafts which are annularly arranged at equal intervals, and the outer rings of the cam shafts make contact with one side of a pressing plate. The other side of the pressing plate is connected with a reset plate, the reset plate is connected with one ends of symmetrically-arranged back-pressing rods, the other ends of the back-pressing rods are in sliding connection with back-pressing holes formed in the piston sleeve, the outer rings of the back-pressing rods are sleeved with back-pressing elastic pieces, one ends of the back-pressing elastic pieces make contact with the reset plate, and the other ends of the back-pressing elastic pieces make contact with the reset plate. The diesel pump capable of improving the preheating efficiency in the cold environment has the advantages that energy-saving driving is achieved, the preheating efficiency is improved, and the low-temperature starting failure rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engines, and particularly to a diesel pump for increasing the preheating efficiency in a cold environment. Background Art

[0002] In the patent application with the publication number CN202010404169.9, an oil circuit preheating system for a diesel engine is disclosed. The diesel engine includes a diesel tank, a diesel pipeline, a diesel filter, and a fuel pump. An electronic pressure pump is added to the diesel filter. Heating elements are respectively arranged inside the diesel tank, inside the diesel pipeline, and outside the diesel filter. The heating elements and the electronic pressure pump are both connected to a control switch, and the control switch is connected to a power source. The preheating method is also disclosed. First, preheat the diesel in the diesel tank, the diesel filter, the first pipeline, and the second pipeline. When the diesel in the sediment cup of the oil-water separator becomes normal in color after wax crystallization, stop heating. Switch the gear of the control switch, and the electronic pressure pump starts to work, pumping the preheated diesel to the fuel pump, and the fuel pump pumps the diesel back to the diesel tank for circulating heating. This can effectively solve the problem of difficult starting of the diesel engine, and at the same time, improve the service life of the fuel pump and reduce costs by adding a fuel filter.

[0003] In the prior art including the above-mentioned patent, in cold conditions, the difficult start of the fuel pump of the diesel engine is mainly caused by the following reasons. First, it is the condensation of diesel at low temperature. When the ambient temperature is lower than the diesel solidification point, the diesel will form waxy crystals to block the oil circuit, resulting in the interruption of oil supply and a significant decrease in fluidity. The solution is mostly to adopt the method of heating the fuel pipeline, but this method still results in slow efficiency. The diesel still needs a long time to be heated to reduce the viscosity and improve the fluidity. At the same time, in cold conditions, the increase in the lubrication resistance of the diesel pump will significantly affect the preheating efficiency.

[0004] Therefore, a diesel pump for increasing the preheating efficiency in a cold environment is needed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a diesel pump for increasing the preheating efficiency in a cold environment to solve the technical problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A diesel pump for increasing the preheating efficiency in a cold environment, the diesel pump body is respectively in transmission connection with a fuel return device and a fuel dispersing device; The diesel pump body includes a first gear, which is drivingly connected to the engine. The first gear is drivingly connected to a gear shaft, and the gear shaft is drivingly connected to a second partition. The second partition is rotatably connected to the end of a camshaft arranged at equal intervals in a ring shape. 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. One end of the reset plate is connected to one end of symmetrically arranged backpressure rods, and the other end of the backpressure rods is slidably connected to a backpressure hole formed in a piston sleeve. A backpressure elastic member is sleeved outside the backpressure rods. One end of the backpressure elastic member contacts the reset plate, and the other end of the backpressure elastic member contacts the piston sleeve. The middle position of the reset plate is connected to an oil delivery piston, and the oil delivery piston is slidably connected to a piston hole. The piston hole communicates with a plurality of sub-oil pipes.

[0007] Preferably, one side of the second partition is connected to one end of connecting columns arranged at equal intervals in a ring shape, and the other end of the connecting columns is connected to a first partition. The outer rings of the first partition and the second partition are rotatably connected to the inner ring of a protective housing. The protective housing is connected to the piston sleeve. The space between the first partition and the second partition communicates with an oil return device.

[0008] Preferably, the oil return device includes a second gear, which is drivingly connected to the first gear. The second gear is drivingly connected to a rotating rod sleeve. One end of the rotating rod sleeve is rotatably and communicatively connected to an oil return pipe. The rotating rod sleeve is equidistantly provided with a plurality of through grooves. The outer ring of the rotating rod sleeve is connected to one end of centrifugal blades arranged at equal intervals in a ring shape. The outer ring of the centrifugal blades is in rotational contact with the inner ring of a centrifugal sleeve. The centrifugal sleeve is connected to and communicates with the protective housing.

[0009] Preferably, the other end of the oil return pipe communicates with the bottom of the protective housing away from the second gear.

[0010] Preferably, the oil dispersing device includes a third gear, which is drivingly connected to one end of a connecting rod. The other end of the connecting rod passes through a housing and is drivingly connected to an inner column. An outer sleeve column is arranged on the outer ring of the inner column, and a reverse structure is arranged between the outer sleeve column and the inner column. One end of a net plate arranged at equal intervals in a ring shape is connected to the outer ring of the outer sleeve column. The outer ring of the net plate is rotatably connected to the inner ring of the housing. The housing is respectively connected to an inlet pipe and an outlet pipe. The outlet pipe communicates with the piston hole, and the inlet pipe communicates with a fuel tank.

[0011] Preferably, the reverse structure includes a rotating block. One end of the rotating block is rotatably connected to both sides of a rotating groove formed in the inner column. One side of the rotating block is connected to one end of a reset elastic member, and the other end of the reset elastic member is connected to the rotating groove. The other end of the rotating block is clamped in a clamping groove formed in the outer sleeve column. The outer sleeve column passes through the housing and is drivingly connected to the output end of a driving motor. The driving motor is connected to the piston sleeve.

[0012] Preferably, electric heating tapes are wound around the outer rings of the sub-oil pipes, the oil return pipe, the protective housing, the inlet pipe, and the outlet pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The diesel pump for increasing the preheating efficiency in a cold environment is reasonable and has the following advantages: The oil return device and the oil scattering device achieve dual-effect energy-saving drive by linking the kinetic energy of the diesel pump body: The oil return device constructs a closed-loop lubrication system, effectively suppressing the increase in lubrication resistance caused by the sharp increase in the viscosity of engine oil under low-temperature conditions by forcibly circulating the lubricating oil in the pump body, ensuring the uniform distribution of the lubricating medium; The synchronously operating oil scattering device uses rotary crushing to quickly break up the diesel wax crystal network structure under the condition of frozen oil, and cooperates with preheating to realize viscosity gradient regulation, which is more efficient than the traditional single preheating scheme, and further reduces the failure rate of low-temperature starting; The lubricating oil enters the camshaft area for circulation through the flow channel formed by the first partition plate, the second partition plate, the connecting column and the protective shell, ensuring that the lubricating oil in the camshaft area and the possible metal debris are discharged into the protective shell, and then the lubricating oil is extracted from other areas of the protective shell to enter, ensuring the utilization rate of the lubricating oil and extending the service life of the lubricating oil.

[0014] When the engine fails to start in a cold environment, the control system will instruct the fuel injector to open briefly. The fuel injector pre-injects a small amount of diesel into the combustion chamber, and the driving motor drives the outer sleeve column to rotate forward. The diesel is broken up into fine particles through the rotating mesh plate, quickly breaking up the diesel wax crystal network structure under the condition of frozen oil, thereby improving the starting success rate. And when the starting is successful, the driving motor stops, and the first gear drives the third gear, the connecting rod and the inner column to rotate forward to continue driving the mesh plate to rotate and break up the diesel in cooperation with preheating, thereby further saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the protective shell in the present invention; Figure 3 is an exploded view of the present invention; Figure 4 is Figure 3 the front view of Figure 5 is a schematic structural diagram of the oil return device in the present invention; Figure 6 is Figure 5 the enlarged view at A in Figure 7 is a schematic structural diagram of the oil scattering device in the present invention; Figure 8 is a cross-sectional view of the housing in the present invention; Figure 9 is Figure 8 the enlarged view at B in

[0016] In the figure: 1-diesel pump body, 111-first gear, 112-protective shell, 113-first partition, 114-second partition, 115-connecting column, 116-camshaft, 117-pressure plate, 118-reset plate, 119-back pressure elastic member, 120-back pressure rod, 121-oil delivery piston, 122-piston sleeve, 1221-piston hole, 1222-back pressure hole, 123-oil distribution pipe, 2-oil return device, 211 -Second gear, 212-centrifugal sleeve, 214-rotating rod sleeve, 215-centrifugal blade, 216-oil return pipe, 3-oil dispersion device, 311-third gear, 312-connecting rod, 313-housing, 3131-mesh plate, 3132-outer column, 3133-inner column, 3134-reversing structure, 31341-rotating block, 31342-resetting elastic member, 314-oil inlet pipe, 315-oil delivery pipe, 316-driving motor. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1-9 The present invention provides a technical solution: a diesel pump that increases the preheating efficiency in a cold environment, comprising a diesel pump body 1, which is respectively connected to an oil return device 2 and an oil dispersion device 3; the oil return device 2 and the oil dispersion device 3 achieve dual-effect energy-saving driving by linking the kinetic energy of the diesel pump body 1: the oil return device 2 constructs a closed-loop lubrication system, which effectively suppresses the problem of increased lubrication resistance caused by a surge in oil viscosity under low-temperature conditions by forcibly circulating the lubricating oil in the pump body, thereby ensuring uniform distribution of the lubricating medium; the synchronously operating oil dispersion device 3 adopts rotary crushing to quickly disintegrate the diesel wax crystal network structure under frozen oil conditions, and cooperates with preheating to achieve viscosity gradient control, which is more efficient than the traditional single preheating solution, and further reduces the failure rate of low-temperature startup.

[0019] The diesel pump main body 1 includes a first gear 111, the first gear 111 is drivingly connected to the engine, the first gear 111 is drivingly connected to a gear shaft, the gear shaft is drivingly connected to a second partition 114, the second partition 114 is rotatably connected to the end of a camshaft 116 arranged at equal intervals in a ring shape, the outer ring of the camshaft 116 contacts one side of a pressure plate 117, 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 symmetrically arranged back-pressure rods 120, the other end of the back-pressure rods 120 is slidably connected to a back-pressure hole 1222 formed in a piston sleeve 122, a back-pressure elastic member 119 is sleeved outside the back-pressure rods 120, one end of the back-pressure elastic member 119 contacts the reset plate 118, the other end of the back-pressure elastic member 119 contacts the piston sleeve 122, the middle position of the reset plate 118 is connected to an oil delivery piston 121, the oil delivery piston 121 is slidably connected to a piston hole 1221, and the piston hole 1221 communicates with a plurality of oil distribution pipes 123.

[0020] One side of the second partition 114 is connected to one end of a connecting column 115 arranged at equal intervals in a ring shape, the other end of the connecting column 115 is connected to a first partition 113, the outer rings of the first partition 113 and the second partition 114 are rotatably connected to the inner ring of a protective housing 112, the protective housing 112 is connected to the piston sleeve 122, the space between the first partition 113 and the second partition 114 communicates with an oil return device 2, and a flow channel is formed by the first partition 113, the second partition 114, the connecting column 115 and the protective housing 112, so as to realize the circulation of lubricating oil entering the camshaft 116 area, ensure that the lubricating oil and possible metal debris in the camshaft 116 area are discharged into the protective housing 112, and then extract lubricating oil from other areas of the protective housing 112 to enter, so as to ensure the utilization rate of the lubricating oil and extend the service life of the lubricating oil.

[0021] The oil return device 2 includes a second gear 211, the second gear 211 is drivingly connected to the first gear 111, the second gear 211 is drivingly connected to a rotating rod sleeve 214, one end of the rotating rod sleeve 214 is rotatably and communicatively connected to an oil return pipe 216, a plurality of through grooves are equidistantly formed in the rotating rod sleeve 214, one end of an outer ring of the rotating rod sleeve 214 is connected to an outer ring of a centrifugal blade 215 arranged at equal intervals in a ring shape, the outer ring of the centrifugal blade 215 is in rotational contact with the inner ring of a centrifugal sleeve 212, the centrifugal sleeve 212 is connected to and communicates with the protective housing 112, the first gear 111 of the diesel pump main body 1 drives the second gear 211 to rotate, so that the rotating rod sleeve 214 and the centrifugal blade 215 rotate, so that the oil return pipe 216 extracts the lubricating oil in the protective housing 112 and enters the through grooves formed in the rotating rod sleeve 214, and 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 cycle, so as to extend the service life of the diesel pump main body 1, and the other end of the oil return pipe 216 communicates with the bottom of the protective housing 112 far away from the second gear 211.

[0022] The oil dispersing device 3 includes a third gear 311. The third gear 311 is drivingly connected to one end of a connecting rod 312. The other end of the connecting rod 312 passes through a housing 313 and is drivingly connected to an inner column 3133. An outer sleeve column 3132 is arranged on the outer circle of the inner column 3133. A reverse structure 3134 is arranged between the outer sleeve column 3132 and the inner column 3133. One end of the outer sleeve column 3132 is connected to one end of a net plate 3131 arranged at equal intervals in a ring shape. The outer circle of the net plate 3131 is rotationally connected to the inner circle of the housing 313. The housing 313 is respectively communicated with an oil inlet pipe 314 and an oil outlet pipe 315. The oil outlet pipe 315 is communicated with a piston hole 1221. The oil inlet pipe 314 is communicated with a fuel tank. Electric heating tapes are wound around the outer circles of a distribution oil pipe 123, a return oil pipe 216, a protective shell 112, the oil inlet pipe 314 and the oil outlet pipe 315.

[0023] The reverse structure 3134 includes a rotating block 31341. One end of the rotating block 31341 is rotationally connected to both sides of a rotating groove opened in the inner column 3133. One side of the rotating block 31341 is connected to one end of a 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 clamped with a clamping groove opened in the outer sleeve column 3132. The outer sleeve column 3132 passes through the housing 313 and is drivingly connected to the output end of a driving motor 316. The driving motor 316 is connected to a piston sleeve 122. When the engine fails to start in a cold environment, the control system will instruct the fuel injector to open briefly. The fuel injector pre-injects a small amount of diesel into the combustion chamber, and the driving motor 316 drives the outer sleeve column 3132 to rotate forward. The diesel is dispersed into fine particles by rotating the net plate 3131, and the diesel wax crystal network structure is quickly disintegrated under the frozen oil working condition, thereby improving the starting success rate. And when the start is successful, the driving motor 316 stops, and the first gear 111 drives the third gear 311, the connecting rod 312 and the inner column 3133 to rotate forward to continue driving the net plate 3131 to rotate to disperse the diesel for preheating, thereby further saving energy consumption.

[0024] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A diesel pump for increasing the preheating efficiency in a cold environment, comprising a diesel pump main body (1), characterized in that: The diesel pump main body (1) is respectively drivingly connected to the oil return device (2) and the oil scattering device (3); The diesel pump main body (1) includes a first gear (111), the first gear (111) is drivingly connected to the engine, the first gear (111) is drivingly connected to a gear shaft, the gear shaft is drivingly connected to a second partition plate (114), the second partition plate (114) is rotatably connected to the end of a camshaft (116) arranged at equal intervals in a ring shape, the outer ring of the camshaft (116) is in contact with one side of a pressure plate (117), 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 symmetrically arranged back pressure rods (120), the other end of the back pressure rods (120) is slidably connected to a back pressure hole (1222) opened in a piston sleeve (122), a back pressure elastic member (119) is sleeved outside the back pressure rods (120), one end of the back pressure elastic member (119) is in contact with the reset plate (118), the other end of the back pressure elastic member (119) is in contact with the piston sleeve (122), an oil delivery piston (121) is connected to the middle position of the reset plate (118), the oil delivery piston (121) is slidably connected to a piston hole (1221), and the piston hole (1221) is communicated with a plurality of sub oil pipes (123).

2. A diesel pump for increasing the preheating efficiency in a cold environment according to claim 1, characterized in that: One side of the second partition plate (114) is connected to one end of a connecting column (115) arranged at equal intervals in a ring shape, the other end of the connecting column (115) is connected to a first partition plate (113), the outer rings of the first partition plate (113) and the second partition plate (114) are rotatably connected to the inner ring of a protective shell (112), the protective shell (112) is connected to the piston sleeve (122), and the space between the first partition plate (113) and the second partition plate (114) is communicated with the oil return device (2).

3. The diesel pump for increasing the preheating efficiency in a cold environment according to claim 2, wherein: The oil return device (2) includes a second gear (211), the second gear (211) is drivingly connected to the first gear (111), the second gear (211) is drivingly connected to a rotating rod sleeve (214), one end of the rotating rod sleeve (214) is rotatably and communicatively connected to an oil return pipe (216), a plurality of through slots are equidistantly opened in the rotating rod sleeve (214), one end of a centrifugal blade (215) arranged at equal intervals in a ring shape is connected to the outer ring of the rotating rod sleeve (214), the outer ring of the centrifugal blade (215) is in rotational contact with the inner ring of a centrifugal sleeve (212), and the centrifugal sleeve (212) is connected to and communicated with the protective shell (112).

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

5. A diesel pump for increasing the preheating efficiency in a cold environment according to claim 1, characterized in that: The oil scattering device (3) includes a third gear (311). The third gear (311) is in driving connection with one end of a connecting rod (312). The other end of the connecting rod (312) passes through a housing (313) and is in driving connection with an inner column (3133). An outer sleeve column (3132) is arranged on the outer circle of the inner column (3133). A reverse structure (3134) is arranged between the outer sleeve column (3132) and the inner column (3133). One end of the outer sleeve column (3132) is connected with a net plate (3131) arranged at equal intervals in a ring shape. The outer circle of the net plate (3131) is rotatably connected with the inner circle of the housing (313). The housing (313) is respectively communicated with an oil inlet pipe (314) and an oil outlet pipe (315). The oil outlet pipe (315) is communicated with a piston hole (1221). The oil inlet pipe (314) is communicated with an oil tank.

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

7. A diesel pump for increasing the preheating efficiency in a cold environment according to claim 1, characterized in that: Electric heating tapes are wound around the outer circles of the oil distribution pipe (123), the oil return pipe (216), the protective shell (112), the oil inlet pipe (314) and the oil outlet pipe (315).

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