V-shaped machine cooling spray hook structure and control method

Abstract

The invention discloses a V-shaped machine cooling spray hook structure and a control method, belongs to the technical field of cooling spray hooks, and solves the technical problem that an existing V-shaped engine needs to be provided with two independent spray hooks at the same time to correspond to pistons on the left side and the right side. The spraying hook structure comprises a spraying hook body, a left spraying pipe corresponding to the left piston hole and a right spraying pipe corresponding to the right piston hole are arranged on the two sides of the spraying hook body respectively, the left spraying pipe and the right spraying pipe are both of a spatial Z-shaped structure, and the spraying hook body is installed in the middle of the machine body between the left piston hole and the right piston hole. An oil inlet hole communicated with a main oil duct in the engine body is formed in the spraying hook body, the left spraying pipe and the right spraying pipe are communicated with the oil inlet hole and provided with nozzles, the nozzles of the left spraying pipe deviate from the center line of the left piston hole by a set distance, the nozzles of the right spraying pipe deviate from the center line of the right piston hole by a set distance, and the nozzles obliquely and upwards spray to the piston; the machine body is provided with a mounting hole communicated with the main oil duct, and a sealing piece is arranged between the spraying hook body and the mounting hole.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling spray hooks, and more specifically, to a V-type machine cooling spray hook structure and a control method. Background Art

[0002] The engine piston is generally cooled by spray hooks. At present, most engines are equipped with a spray hook for each piston. The spray hook is usually arranged on the engine body and connected to the main oil channel. When working, the spray hook can continuously spray oil to the bottom of the piston for cooling. For V-type engines, there are pistons on both sides, and usually two spray hooks are arranged at the same time to cool the left and right pistons.

[0003] The installation structure of this method is relatively complicated. The number of spray hook bodies is consistent with the number of piston holes, the number of mounting seats that need to be processed is also consistent with the number of piston holes, and the production cost is also relatively high. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One purpose of the present invention is to provide a V-type machine cooling spray hook structure that can reduce structural complexity and production costs.

[0005] The second purpose of the present invention is to provide a control method for a V-type machine cooling spray hook structure.

[0006] In order to achieve the above-mentioned purpose one, the present invention provides a V-type machine cooling spray hook structure, including a spray hook body, two sides of the spray hook body are respectively provided with a left nozzle corresponding to the left piston hole and a right nozzle corresponding to the right piston hole, the left nozzle and the right nozzle are both spatial Z-shaped structures, the spray hook body is installed in the middle position of the machine body between the left piston hole and the right piston hole, an oil inlet hole for communicating with the main oil channel in the machine body is provided in the spray hook body, the left nozzle and the right nozzle are connected with the oil inlet hole, the left nozzle and the right nozzle are both provided with nozzles, the nozzle of the left nozzle deviates from the center line of the left piston hole by a set distance, the nozzle of the right nozzle deviates from the center line of the right piston hole by a set distance, the nozzle is a conical structure with a large inlet and a small outlet, the nozzle is tilted upward to spray toward the piston, the machine body is provided with a mounting hole connected to the main oil channel, the spray hook body is inserted in the mounting hole, and a sealing member is provided between the spray hook body and the mounting hole.

[0007] As a further improvement, a spray hook mounting plate is fixedly connected to the outer wall of the spray hook body, and the machine body is provided with a mounting platform corresponding to the spray hook mounting plate, and the spray hook mounting plate is locked on the mounting platform by bolts.

[0008] Furthermore, the spray hook mounting plate is provided with a bolt mounting hole adapted to the bolt.

[0009] Furthermore, the spray hook mounting plate is provided with a positioning pin.

[0010] Furthermore, the bolt mounting holes and the positioning pins are respectively located at two ends of the spray hook mounting plate.

[0011] Furthermore, a step for installing the sealing member is provided at the lower end of the spray hook body.

[0012] Furthermore, the sealing member is a sealing ring or a sealing gasket.

[0013] Furthermore, the left nozzle and the right nozzle are centrally symmetrical structures, the left nozzle and the right nozzle extend in directions away from each other, the nozzle of the left nozzle is located below the center line of the left piston hole, and the nozzle of the right nozzle is located above the center line of the right piston hole.

[0014] Furthermore, a buffer oil chamber is provided in the middle of the oil inlet hole.

[0015] In order to achieve the above-mentioned second objective, the present invention provides a control method for a V-type machine cooling spray hook structure, comprising:

[0016] Obtain the piston power intensity. When the piston power intensity reaches the set value, start to enable the cooling spray hook;

[0017] Obtain the maximum speed of the piston, determine the injection speed of the cooling spray hook according to the maximum speed of the piston, and ensure that the injection speed catches up with the piston;

[0018] Calculate the nozzle flow rate Q according to the single-cylinder piston power to ensure that the piston can be effectively cooled;

[0019] Q≥(5~7L)*single cylinder piston power;

[0020] The operation of the oil supply pump is controlled according to the piston power intensity, injection speed and flow rate Q.

[0021] Beneficial Effects

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The spray hook structure of the present invention can take into account the cooling of two pistons on the left and right sides at the same time, and can reduce one spray hook installation surface of the machine body, thereby reducing structural complexity and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the bottom structure of the spray hook body in the present invention;

[0026] Figure 3It is a schematic diagram of the three-dimensional structure of the spray hook body in the present invention;

[0027] Figure 4 It is a schematic diagram of the internal structure of the spray hook body in the present invention.

[0028] Among them: 1-spray hook body, 2-left piston hole, 3-left nozzle, 4-right piston hole, 5-right nozzle, 6-body, 7-main oil channel, 8-oil inlet hole, 9-nozzle, 10-seal, 11-spray hook mounting plate, 12-mounting table, 13-bolt, 14-bolt mounting hole, 15-locating pin, 16-step, 17-buffer oil chamber. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0030] See also Figure 1 to Figure 4 A V-shaped cooling spray hook structure includes a spray hook body 1, and two sides of the spray hook body 1 are respectively provided with a left spray pipe 3 corresponding to the left piston hole 2 and a right spray pipe 5 corresponding to the right piston hole 4, and the left spray pipe 3 and the right spray pipe 5 are both spatial Z-shaped structures. The spray hook of the present invention can take into account the cooling of the left and right pistons at the same time, such as Figure 1 As shown, the cylinder holes (i.e., the left piston hole and the right piston hole) of the V-type engine are arranged in a left-right staggered arrangement, and the spray hook is arranged in the middle position of the engine body facing the main oil channel of the engine body. The left nozzle 3 and the right nozzle 5 of the spray hook respectively spray oil to cool the left and right pistons.

[0031] Specifically, the spray hook body 1 is installed in the middle position of the machine body 6 between the left piston hole 2 and the right piston hole 4. The spray hook body 1 is provided with an oil inlet hole 8 for communicating with the main oil channel 7 in the machine body 6. The left nozzle 3 and the right nozzle 5 are connected with the oil inlet hole 8. The left nozzle 3 and the right nozzle 5 are both provided with a nozzle 9. The nozzle 9 of the left nozzle 3 deviates from the center line of the left piston hole 2 by a set distance, and the nozzle 9 of the right nozzle 5 deviates from the center line of the right piston hole 4 by a set distance, so as to make way for the piston connecting rod. The nozzle 9 is a conical structure with a large inlet and a small outlet. The large end diameter of the nozzle 9 is equal to the nozzle diameter. The small outlet of the nozzle 9 can increase the injection speed of the engine oil. The nozzle 9 is located at the edge of the piston hole. The nozzle 9 sprays upward toward the piston at an angle, so that the engine oil can be sprayed into the middle of the piston. The machine body 6 is provided with a mounting hole connected with the main oil channel 7. The spray hook body 1 is inserted into the mounting hole. A sealing member 10 is provided between the spray hook body 1 and the mounting hole.

[0032] Furthermore, a spray hook mounting plate 11 is fixedly connected to the outer wall of the spray hook body 1, and the body 6 is provided with a mounting platform 12 corresponding to the spray hook mounting plate 11. The spray hook mounting plate 11 is locked on the mounting platform 12 by bolts 13. The spray hook mounting plate 11 is provided with bolt mounting holes 14 adapted to the bolts 13, so as to facilitate the installation and disassembly of the spray hook.

[0033] Preferably, the spray hook mounting plate 11 is provided with a positioning pin 15, which can be used for positioning when installing the spray hook. The bolt mounting hole 14 and the positioning pin 15 are respectively located at both ends of the spray hook mounting plate 11. The shape of the spray hook mounting plate 11 is similar to the triangular structure of a boomerang, which can reduce the size and give way.

[0034] A step 16 for installing a sealing member 10 is provided at the lower end of the spray hook body 1 . The sealing member 10 is a sealing ring or a sealing gasket. When installing, the sealing member 10 is sleeved on the step 16 .

[0035] The left nozzle 3 and the right nozzle 5 have the same structure and are centrally symmetrical. The left nozzle 3 and the right nozzle 5 extend away from each other. The nozzle 9 of the left nozzle 3 is located below the center line of the left piston hole 2, and the nozzle 9 of the right nozzle 5 is located above the center line of the right piston hole 4.

[0036] A buffer oil chamber 17 is provided in the middle of the oil inlet hole 8. During operation, the buffer oil chamber 17 can reduce the flow fluctuation of the left nozzle 3 and the right nozzle 5 caused by the flow fluctuation of the main oil channel.

[0037] The spray hook body 1 is a cylindrical structure, the left nozzle 3 and the right nozzle 5 are respectively welded to the spray hook body 1, the spray hook mounting plate 11 is a thin sheet structure, conformally designed, and is welded to the spray hook body 1 as a whole, and the positioning pin 15 is a cylindrical pin welded to the spray hook mounting plate 11.

[0038] A control method for a V-type machine cooling spray hook structure, comprising:

[0039] Obtain the piston power intensity. When the piston power intensity reaches the set value, start to use the cooling spray hook. According to the engine external characteristics and piston size, the piston power intensity corresponding to the external characteristic curve can be calculated. In this embodiment, the piston power intensity is ≥2.5W / mm 2 The piston needs to be cooled; the external characteristic curve is used to calculate that the piston power intensity is 2.52.5W / mm 2 When the speed reaches 1400rpm, the spray hook must be turned on to cool the piston. For example, when the speed reaches 1400rpm, the spray hook must be turned on to cool the piston.

[0040] Get the maximum speed of the piston, determine the injection speed of the cooling spray hook according to the maximum speed of the piston, and ensure that the injection speed catches up with the piston; the maximum speed of the piston = 2 × maximum stroke × speed;

[0041] Calculate the flow rate Q of nozzle 9 according to the single-cylinder piston power to ensure that the piston can be effectively cooled;

[0042] Q≥(5~7)*single cylinder piston power;

[0043] The flow rate formula is an empirical formula. The single-cylinder piston power is based on the power / cylinder number at each speed point of the engine. In this way, the single-cylinder piston power at each speed point can be calculated. For example, the rated power is 324kW, and the corresponding rated speed is 3300r / min. The single-cylinder power = 324 / 6 = 54kW, and the flow rate requirement (according to the minimum requirement of 5)

[0044] =5*54=270L / h=4.5L / min, that is, the flow rate of the spray hook at the rated point must be greater than 4.5L / min, and the same calculation applies to other speed points; this is also the design indicator; whether the actual design meets the standard is also calculated by flowmaster software, and finally compared with the demand target;

[0045] Finally, the operation of the oil supply pump is controlled according to the piston power intensity, injection speed, and flow rate Q to ensure that the piston can be effectively cooled and the stability and service life of the engine are guaranteed.

[0046] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A V-type machine cooling spray hook structure, comprising a spray hook body (1), characterized in that: The two sides of the spray hook body (1) are respectively provided with a left spray pipe (3) corresponding to the left piston hole (2) and a right spray pipe (5) corresponding to the right piston hole (4). The left spray pipe (3) and the right spray pipe (5) are both of a spatial Z-shaped structure. The spray hook body (1) is installed in the middle position of the machine body (6) between the left piston hole (2) and the right piston hole (4). The spray hook body (1) is provided with an oil inlet hole (8) for communicating with a main oil channel (7) in the machine body (6). The left spray pipe (3) and the right spray pipe (5) are in communication with the oil inlet hole (8). The left spray pipe (3) and the right spray pipe (5) are in communication with the oil inlet hole (8). (3) and the right nozzle (5) are both provided with a nozzle (9). The nozzle (9) of the left nozzle (3) is offset from the center line of the left piston hole (2) by a set distance. The nozzle (9) of the right nozzle (5) is offset from the center line of the right piston hole (4) by a set distance. The nozzle (9) is a conical structure with a large inlet and a small outlet. The nozzle (9) sprays upward toward the piston at an angle. The machine body (6) is provided with a mounting hole connected to the main oil channel (7). The spray hook body (1) is inserted into the mounting hole. A sealing member (10) is provided between the spray hook body (1) and the mounting hole.

2. A V-type machine cooling spray hook structure according to claim 1, characterized in that: The outer wall of the spray hook body (1) is fixedly connected to a spray hook mounting plate (11); the machine body (6) is provided with a mounting platform (12) corresponding to the spray hook mounting plate (11); and the spray hook mounting plate (11) is locked on the mounting platform (12) by means of bolts (13).

3. A V-type machine cooling spray hook structure according to claim 2, characterized in that: The spray hook mounting plate (11) is provided with a bolt mounting hole (14) adapted to the bolt (13).

4. A V-type machine cooling spray hook structure according to claim 3, characterized in that: The spray hook mounting plate (11) is provided with a positioning pin (15).

5. A V-type machine cooling spray hook structure according to claim 4, characterized in that: The bolt mounting hole (14) and the positioning pin (15) are respectively located at two ends of the spray hook mounting plate (11).

6. A V-type machine cooling spray hook structure according to claim 1, characterized in that: The lower end of the spray hook body (1) is provided with a step (16) for installing the sealing member (10).

7. A V-type machine cooling spray hook structure according to claim 6, characterized in that: The sealing element (10) is a sealing ring or a sealing gasket.

8. The V-type machine cooling spray hook structure according to claim 1, characterized in that: The left nozzle (3) and the right nozzle (5) are centrally symmetrical structures. The left nozzle (3) and the right nozzle (5) extend in directions away from each other. The nozzle (9) of the left nozzle (3) is located below the center line of the left piston hole (2), and the nozzle (9) of the right nozzle (5) is located above the center line of the right piston hole (4).

9. A V-type machine cooling spray hook structure according to claim 1, characterized in that: A buffer oil chamber (17) is provided in the middle of the oil inlet hole (8).

10. A control method for a V-type machine cooling spray hook structure, characterized in that: include: Obtain the piston power intensity. When the piston power intensity reaches the set value, start to enable the cooling spray hook; Obtain the maximum speed of the piston, determine the injection speed of the cooling spray hook according to the maximum speed of the piston, and ensure that the injection speed catches up with the piston; Calculate the flow rate Q of the nozzle (9) according to the single-cylinder piston power to ensure that the piston can be effectively cooled; Q≥(5~7L)*single cylinder piston power; The operation of the oil supply pump is controlled according to the piston power intensity, injection speed and flow rate Q.

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