Plateau supercharging air inlet system of excavator engine and engineering machinery
By adding fan intake branch between the air filter and the turbocharger of the excavator engine, the problem of power drop in the plateau area is solved, and the engine intake pressure is increased and the operation efficiency is maintained.
Patent Information
- Application Number
- CN202421207619.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-30
AI Technical Summary
In plateau areas, excavator engines have reduced power due to reduced atmospheric pressure and reduced power, resulting in reduced operating capacity. The prior art is usually solved by reducing the main pump power, but this will reduce operating efficiency and waste performance.
A plateau supercharged air intake system of excavator engine is designed. By adding a fan intake branch between the air filter and the turbocharger, in a high-altitude low-pressure environment, the fan suctions the air from the air filter and then supplies the boosted air to the turbocharger, thereby increasing the engine intake pressure.
This system improves the engine's power output in the plateau area, ensures stable and sufficient engine intake, avoids the problem of reduced operating capacity, does not need to reduce the main pump power, retains operating efficiency, and avoids waste of performance.
Smart Images
Figure CN222615460U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plateau supercharging air intake system of an excavator engine and engineering machinery, belonging to the technical field of engineering machinery excavators. Background Art
[0002] After the excavator reaches the plateau, the power will drop by several to several tens of percent as the altitude increases and the atmospheric pressure decreases. The power drop will cause black smoke, pressure holding and flameout, etc. To solve the above problems, the existing technology generally adopts the strategy of reducing the power of the main pump and reducing the engine load, but such a solution will reduce the working efficiency, and the high-power engine can only be used as a low-power engine, which will cause a waste of performance. Summary of the invention
[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a plateau supercharged air intake system for an excavator engine, which does not require reducing the power of the main pump, ensures operating efficiency, and avoids wasting performance.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] A high-altitude supercharged air intake system for an excavator engine comprises a one-way valve, a fan, an air filter and a turbocharger, wherein the air filter, the one-way valve and the turbocharger are connected in sequence along an air inlet direction, the air inlet of the fan is connected to one end of an air intake pipe of the fan, the other end of the air intake pipe of the fan is connected between the air filter and the one-way valve, the air outlet of the fan is connected to one end of an air outlet pipe of the fan, the other end of the air outlet pipe of the fan is connected between the turbocharger and the one-way valve.
[0006] The air outlet end of the air filter is connected to one end of the first air intake connecting pipe, the air inlet end of the one-way valve is connected to one end of the second air intake connecting pipe, the end of the fan suction pipe away from the fan is connected to one end of the first three-way pipe, and the other two ends of the first three-way pipe are respectively connected to the other end of the first air intake connecting pipe and the other end of the second air intake connecting pipe.
[0007] The outlet end of the one-way valve is connected to one end of the third air intake connecting pipe, the air intake end of the turbocharger is connected to one end of the fourth air intake connecting pipe, the end of the fan air outlet pipe away from the fan is connected to one end of the second three-way pipe, and the other two ends of the second three-way pipe are respectively connected to the other end of the third air intake connecting pipe and the other end of the fourth air intake connecting pipe.
[0008] The first three-way connection is fixed to the fan suction pipe, the first air intake connecting pipe and the second air intake connecting pipe via a first throat clamp.
[0009] The second three-way connection is fixed to the fan air outlet pipe, the third air inlet connecting pipe and the fourth air inlet connecting pipe by a second throat clamp.
[0010] A first negative pressure sensor is provided on the first three-way connection and between the air filter and the fan. The first negative pressure sensor is connected to a signal input end of a controller, and a signal output end of the controller is electrically connected to a control switch of the fan.
[0011] A second negative pressure sensor is provided on the second three-way connection and between the turbocharger and the fan. The second negative pressure sensor is connected to a signal input end of a controller, and a signal output end of the controller is electrically connected to a control switch of the fan.
[0012] An engineering machine comprises the excavator engine plateau supercharging air intake system.
[0013] The beneficial effects of the utility model are as follows: the utility model provides an excavator engine plateau supercharged intake system, the air inlet of the fan is connected to one end of the fan suction pipe, the other end of the fan suction pipe is connected between the air filter and the one-way valve, the air outlet of the fan is connected to one end of the fan outlet pipe, the other end of the fan outlet pipe is connected between the turbocharger and the one-way valve, and by adding a fan intake branch between the engine's air filter and the turbocharger, in a plateau low-pressure environment, the fan sucks air from the air filter for supercharging and then provides the supercharged air to the turbocharger, thereby increasing the engine's intake pressure, ensuring that the engine intake is stable and sufficient, and avoiding the problem of reduced excavator operating capacity due to reduced engine power. Therefore, the utility model does not need to reduce the power of the main pump, ensures operating efficiency, avoids waste of performance, and improves The plateau power output of the engine is improved, and the plateau operation ability of the excavator is improved; a first negative pressure sensor is arranged on the first three-way and located between the air filter and the fan, the first negative pressure sensor is connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the control switch of the fan. When the first negative pressure sensor detects that the negative pressure at this place is too low, the controller stops the operation of the fan to protect the air filter and prevent the air filter from being sucked and broken due to blockage; a second negative pressure sensor is arranged on the second three-way and located between the turbocharger and the fan, the second negative pressure sensor is connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the control switch of the fan. By detecting the second negative pressure sensor to determine whether the negative pressure meets the normal operation of the engine, the fan can be automatically controlled to start and stop, thereby realizing automatic control of the fan branch pressurization. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic structural diagram of a high-altitude supercharging intake system for an excavator engine according to the utility model;
[0015] Figure 2 This is a schematic diagram of the control principle of Example 2.
[0016] The reference numerals in the figure are as follows: 1-second three-way valve; 2-fan outlet pipe; 3-one-way valve; 4-fan; 5-fan suction pipe; 6-first three-way valve; 7-air filter; 8-first throat clamp; 9-first air intake connecting pipe; 10-first negative pressure sensor; 11-second air intake connecting pipe; 12-third air intake connecting pipe; 13-second negative pressure sensor; 14-fourth air intake connecting pipe; 15-second throat clamp; 16-turbocharger. DETAILED DESCRIPTION
[0017] Example 1
[0018] like Figure 1 As shown, the utility model discloses a high-altitude supercharged air intake system for an excavator engine, including a one-way valve 3, an air filter 7 and a turbocharger 16. The air filter 7, the one-way valve 3 and the turbocharger 16 are connected in sequence along the air intake direction. This part is a traditional air intake branch. When operating on the plain or starting up, the turbocharger 16 can directly inhale air from the air filter 7 through the one-way valve 3. The improvement of the utility model is to add a fan supercharged branch to the traditional air intake branch. The fan supercharged branch includes a fan 4. The air inlet of the fan 4 is connected to one end of the fan suction pipe 5. The other end of the fan suction pipe 5 is connected between the air filter 7 and the one-way valve 3. The air outlet of the fan 4 is connected to one end of the fan outlet pipe 2. The other end of the fan outlet pipe 2 is connected between the turbocharger 16 and the one-way valve 3. The opening pressure of the one-way valve 3 is relatively low, and will not cause excessive back pressure to the traditional air intake branch.
[0019] The working process of the utility model is as follows: when operating in non-altitude areas, the atmospheric pressure is normal, the fan 4 does not work, the fan boost branch is blocked, the one-way valve 3 is opened, and the air passes through the air filter 7, the one-way valve 3 and the turbocharger 16 in sequence to supply air to the engine; when operating in high altitude areas, the atmospheric pressure is relatively low, the fan 4 sucks air from the air filter 7, blows the air into the turbocharger 16, and provides the turbocharger 16 with pressurized air. At this time, the one-way valve 3 on the traditional intake branch is automatically closed due to the pressure difference between the front and rear.
[0020] The utility model adds a fan intake branch between the engine's air filter and the turbocharger. In a plateau low-pressure environment, the fan draws air from the air filter and boosts it, and then provides the boosted air to the turbocharger, thereby increasing the engine's intake pressure, ensuring stable and sufficient engine intake, and avoiding the problem of reduced excavator operating capacity due to decreased engine power. Therefore, the utility model does not need to reduce the power of the main pump, ensures operating efficiency, avoids performance waste, increases the engine's plateau power output, and improves the excavator's plateau operating capacity.
[0021] Example 2
[0022] like Figure 1 As shown, the utility model discloses a high-altitude supercharged air intake system for an excavator engine, including a one-way valve 3, an air filter 7 and a turbocharger 16. The air filter 7, the one-way valve 3 and the turbocharger 16 are connected in sequence along the air intake direction. This part is a traditional air intake branch. When operating on the plain or starting up, the turbocharger 16 can directly inhale air from the air filter 7 through the one-way valve 3. The improvement of the utility model is to add a fan supercharged branch to the traditional air intake branch. The fan supercharged branch includes a fan 4. The air inlet of the fan 4 is connected to one end of the fan suction pipe 5. The other end of the fan suction pipe 5 is connected between the air filter 7 and the one-way valve 3. The air outlet of the fan 4 is connected to one end of the fan outlet pipe 2. The other end of the fan outlet pipe 2 is connected between the turbocharger 16 and the one-way valve 3. The opening pressure of the one-way valve 3 is relatively low, and will not cause excessive back pressure to the traditional air intake branch.
[0023] Specifically, the air outlet end of the air filter 7 is connected to one end of the first air intake connecting pipe 9, the air intake end of the one-way valve 3 is connected to one end of the second air intake connecting pipe 11, the end of the fan suction pipe 5 away from the fan 4 is connected to one end of the first three-way 6, and the other two ends of the first three-way 6 are respectively connected to the other end of the first air intake connecting pipe 9 and the other end of the second air intake connecting pipe 11. The air outlet end of the one-way valve 3 is connected to one end of the third air intake connecting pipe 12, the air intake end of the turbocharger 16 is connected to one end of the fourth air intake connecting pipe 14, the end of the fan air outlet pipe 2 away from the fan 4 is connected to one end of the second three-way 1, and the other two ends of the second three-way 1 are respectively connected to the other end of the third air intake connecting pipe 12 and the other end of the fourth air intake connecting pipe 14.
[0024] The first three-way connection 6 is fixed to the fan suction pipe 5, the first air inlet connection pipe 9 and the second air inlet connection pipe 11 by a first throat hoop 8. The second three-way connection 1 is fixed to the fan outlet pipe 2, the third air inlet connection pipe 12 and the fourth air inlet connection pipe 14 by a second throat hoop 15.
[0025] A first negative pressure sensor 10 is provided on the first three-way connection 6 and between the air filter 7 and the fan 4. The first negative pressure sensor 10 is connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the control switch of the fan 4. A second negative pressure sensor 13 is provided on the second three-way connection 1 and between the turbocharger 16 and the fan 4. The second negative pressure sensor 13 is connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the control switch of the fan 4.
[0026] like Figure 2As shown, the utility model is provided with a first negative pressure sensor 10 between the air filter 7 and the fan 4, collects the negative pressure signal and transmits it to the controller to convert it into a negative pressure signal NPq, and compares it with the negative pressure limit value NPj pre-stored there, to obtain a difference △Pq. If △Pq is less than zero, it means that the negative pressure there is too low, then the fan 4 is stopped to protect the air filter 7 and prevent the air filter 7 from being sucked up and broken due to blockage, and at the same time alarms to remind maintenance or replacement of the filter element, which is a priority.
[0027] The one-way valve 3 and the fan 4 are two branches that inhale air from the air filter 7 and provide air to the turbocharger 16 in parallel. When starting, the turbocharger 16 directly inhales air from the air filter 7 through the one-way valve 3. After starting, the second negative pressure sensor 13 arranged between the fan 4 and the turbocharger 16 collects the negative pressure signal and transmits it to the controller to convert it into a negative pressure signal NPh, and compares it with the standard negative pressure value NPb pre-stored there, and obtains the difference △Ph. If △Ph is greater than or equal to zero, it means that the negative pressure value at this place meets the normal operation of the engine, and then the command to start the fan 4 is not issued, and the turbocharger 16 still directly inhales air from the air filter 7 through the one-way valve 3 branch; if △Ph is less than zero, the controller sends a start command to the fan 4, and the fan 4 inhales air from the air filter 7 to provide the turbocharger 16 with pressurized air, and the one-way valve 3 is automatically closed due to the pressure difference between the front and rear.
[0028] In addition, the fan 4 in the utility model is a DC variable fan, which changes the speed according to the strength of the command signal sent by the controller to adjust the intake pressure before the turbocharger 16, providing it with a relatively suitable and stable air supply; the power of the fan 4 comes from the battery or DC generator of the whole machine. When △Ph is a negative value, the controller can change the size of the fan current according to its size, adjust the fan flow, and make △Ph approach zero.
[0029] Example 3
[0030] This embodiment discloses a construction machinery, including the high-altitude supercharging intake system of the excavator engine in Embodiment 2.
[0031] The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A high-altitude supercharging intake system for an excavator engine, characterized by: The invention comprises a one-way valve (3), a fan (4), an air filter (7) and a turbocharger (16); the air filter (7), the one-way valve (3) and the turbocharger (16) are connected in sequence along the air inlet direction; the air inlet of the fan (4) is connected to one end of a fan air intake pipe (5); the other end of the fan air intake pipe (5) is connected between the air filter (7) and the one-way valve (3); the air outlet of the fan (4) is connected to one end of a fan air outlet pipe (2); the other end of the fan air outlet pipe (2) is connected between the turbocharger (16) and the one-way valve (3).
2. The high-altitude supercharging intake system for an excavator engine according to claim 1 is characterized by: The air outlet end of the air filter (7) is in communication with one end of the first air inlet connecting pipe (9), the air inlet end of the one-way valve (3) is in communication with one end of the second air inlet connecting pipe (11), the end of the fan suction pipe (5) away from the fan (4) is in communication with one end of the first three-way connection (6), and the other two ends of the first three-way connection (6) are respectively in communication with the other end of the first air inlet connecting pipe (9) and the other end of the second air inlet connecting pipe (11).
3. The high-altitude supercharging intake system for an excavator engine according to claim 1 is characterized by: The outlet end of the one-way valve (3) is in communication with one end of the third air intake connecting pipe (12), the air intake end of the turbocharger (16) is in communication with one end of the fourth air intake connecting pipe (14), the end of the fan air outlet pipe (2) away from the fan (4) is in communication with one end of the second three-way connection (1), and the other two ends of the second three-way connection (1) are respectively in communication with the other end of the third air intake connecting pipe (12) and the other end of the fourth air intake connecting pipe (14).
4. The high-altitude supercharging intake system for an excavator engine according to claim 2 is characterized by: The first three-way joint (6) is fixed to the fan suction pipe (5), the first air intake connecting pipe (9) and the second air intake connecting pipe (11) via a first throat clamp (8).
5. The high-altitude supercharging intake system for an excavator engine according to claim 3 is characterized by: The second three-way joint (1) is fixed to the fan air outlet pipe (2), the third air inlet connecting pipe (12) and the fourth air inlet connecting pipe (14) via a second throat clamp (15).
6. The high-altitude supercharging intake system for an excavator engine according to claim 2, characterized in that: A first negative pressure sensor (10) is provided on the first three-way valve (6) and between the air filter (7) and the fan (4); the first negative pressure sensor (10) is connected to a signal input end of a controller; and a signal output end of the controller is electrically connected to a control switch of the fan (4).
7. The high-altitude supercharging intake system for an excavator engine according to claim 3 is characterized by: A second negative pressure sensor (13) is provided on the second three-way valve (1) and between the turbocharger (16) and the fan (4); the second negative pressure sensor (13) is connected to a signal input end of a controller; and a signal output end of the controller is electrically connected to a control switch of the fan (4).
8. An engineering machine, characterized in that: The invention comprises the high-altitude supercharging air intake system for an excavator engine as described in any one of claims 1 to 7.