CN104110370A - Electric control oil injection pump air cylinder lubricating system - Google Patents

Abstract

The invention discloses an electronically controlled oil injection pump cylinder lubrication system, which comprises an oil injection nozzle installed on the cylinder, a shell connected with the oil injection nozzle, a plunger chamber arranged in the casing, and oil inlets arranged on both sides of the plunger chamber. The plunger installed in the plunger cavity, the tappet with the roller at the lower end and the camshaft connected with the roller transmission, the bottom surface of the plunger is provided with a socket, the upper end of the tappet is inserted into the socket, the upper end of the plunger On the side wall corresponding to the oil return port, there is a vertically arranged zero oil channel connected with the plunger cavity. The lower part of the zero oil channel is provided with an oil volume adjustment groove obliquely along the circumferential direction. The oil volume adjustment groove is connected with the zero oil volume The lower part of the measuring channel is connected; the position corresponding to the lower end of the plunger in the housing is provided with a gear that can drive the plunger to rotate, and the lower end of the plunger is inserted into the gear so that it can move up and down. A rack, one end of the rack is connected with a driving device, and the driving device is controlled by a control unit. Applied to the engine.

Description

Electric control oil pump cylinder lubrication system

technical field

The invention relates to a cylinder lubricating system for a diesel engine, in particular to an electronically controlled oil injection pump cylinder lubricating system.

Background technique

At present, large marine low-speed diesel engines generally use crosshead two-stroke diesel engines. In crosshead two-stroke diesel engines, the upper part of the frame is equipped with a diaphragm and a piston rod stuffing box to separate the cylinder from the crankcase. Such structural features It is determined that the lubrication between the piston group and the cylinder liner must adopt the cylinder lubrication system.

The general cylinder lubrication system mostly adopts mechanical lubricator. This kind of lubricator is driven by the engine through the sprocket to rotate the camshaft of the lubricator. Its oil injection frequency is synchronized with the engine speed. This mechanical oil injector has the following problems in actual use:

Since the oil injection frequency of the oil injector is synchronized with the engine speed, and the stroke of the plunger of the oil injector is not adjustable during engine operation, the oil injection of the oil injector is less when the engine is running at low speed, resulting in insufficient lubrication. It affects the normal operation of the cylinder; and when the engine is running at high speed, the amount of oil injected by the lubricator is too much, resulting in too much lubricating oil, which can easily lead to carbon deposits in the cylinder.

Contents of the invention

The object of the present invention is to solve the shortcomings of the above-mentioned background technology, and propose an electronically controlled oil injection pump cylinder lubrication system whose oil injection volume can be automatically adjusted according to actual working conditions.

In order to achieve the above object, the present invention adopts the following technical solutions: an electronically controlled oil injection pump cylinder lubrication system, including an oil injector, the oil injector includes an oil injection nozzle installed on the cylinder, a housing communicated with the oil injection nozzle, a device The plunger chamber in the housing, the oil inlet and the oil return port arranged on both sides of the plunger chamber, the plunger installed in the plunger chamber, the tappet with the roller at the lower end and the The camshaft connected by roller transmission, the bottom surface of the plunger is provided with a socket, the upper end of the tappet is inserted into the socket, and the side wall of the upper end of the plunger is provided with a vertical Arranged zero oil volume passage communicated with the plunger cavity, the lower part of the zero oil volume passage is provided with an oil volume adjustment groove obliquely along the circumferential direction, and the oil volume adjustment groove communicates with the lower part of the zero oil volume passage; The position corresponding to the lower end of the plunger in the housing is provided with a gear that can drive the plunger to rotate. The lower end of the plunger is inserted into the gear so that it can move up and down. A rack is provided at the position to drive the gear to rotate, and a drive device is connected to one end of the rack, and the drive device is controlled by a control unit, which can control the drive device in real time to drive the The rack moves, thereby causing the gear to rotate to adjust the rotational position of the plunger. By adopting a zero oil volume channel and an oil volume adjustment groove on the side wall of the plunger, and using the control unit to control the driving device in real time to drive the rack to move, so as to rotate the gear to adjust the rotational position of the plunger The technical scheme achieves the purpose of automatically adjusting the oil injection amount according to the actual working conditions of the engine, and the structure is simple and the cost is low.

In the above-mentioned solution, the rack is laterally movably inserted on the housing.

In the above solution, a key is provided on the outer wall of the lower end of the plunger, and the lower end of the plunger is inserted into the gear so that it can move up and down through the key.

In the above solution, the gear is positioned and installed in the housing through a retaining ring. Of course, other structures can also be used to ensure that the gear can only rotate at a fixed position.

In the above solution, the middle part of the plunger is provided with a sealing platform whose diameter matches the diameter of the plunger cavity, so as to ensure the sealing of the plunger cavity.

In the above solution, the channel width of the zero oil volume channel matches the caliber of the oil return port.

The channel length of the zero oil volume channel is equal to or greater than the maximum stroke of the plunger, so as to ensure that the oil injector does not inject oil when the rotation position of the plunger is at the zero oil injection position.

In the above solution, the driving device is an iron-absorbing switch. Of course, other power devices such as cylinders can also be used.

Compared with the prior art, the present invention fully demonstrates that its superiority is:

By adopting a zero oil volume channel and an oil volume adjustment groove on the side wall of the plunger, and using the control unit to control the driving device in real time to drive the rack to move, so as to rotate the gear to adjust the rotational position of the plunger The technical scheme achieves the purpose of automatically adjusting the oil injection amount according to the actual working conditions of the engine, and the structure is simple and the cost is low.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic structural view of the present invention when it is at the maximum oil injection rate and the plunger is at the lowest position;

Fig. 2 is a schematic structural view of the present invention when it is at the maximum oil injection rate and the plunger is at the highest position;

Fig. 3 is a structural schematic view of the present invention when it is in zero oil injection and the plunger is at the lowest position;

Fig. 4 is a structural schematic view of the present invention when it is in zero oil injection and the plunger is at the highest position;

Fig. 5 is a partial enlarged structural schematic diagram of part A in Fig. 2;

Fig. 6 is a schematic diagram of the structure when the plunger in Fig. 5 is rotated to the position where the oil volume adjustment groove faces the oil return port;

Fig. 7 is a partial enlarged structural schematic diagram of part B in Fig. 4;

Fig. 8 is a front structural schematic view of the plunger;

Fig. 9 is a left view structural schematic diagram of the plunger;

Fig. 10 is a right view structural diagram of the plunger;

Figure 11 is a schematic view of the plunger looking up from above;

Fig. 12 is a top view structural schematic diagram of the plunger;

Fig. 13 is a schematic cross-sectional structure diagram along line C-C in Fig. 12;

Fig. 14 is a schematic circuit diagram of the present invention.

In the figure, the oil injector 1, the oil injection nozzle 1a, the housing 1b, the plunger cavity 1c, the oil inlet 1d, the oil return port 1e, the plunger 1f, the socket 1f1, the zero oil passage 1f2, the oil adjustment groove 1f3, Sealing table 1f4, key 1f5, tappet 1g, camshaft 1h, gear 1i, rack 1j, driving device 1k, oil discharge valve assembly 1l, retaining ring 1m, control unit 2, controller 2a, sensor 2b, human-computer interaction Unit 2c, uninterruptible power supply 2d, charger 2e, cylinder 3, oil supply unit 4.

Detailed ways

An electronically controlled oil injection pump cylinder lubrication system as shown in Figure 1 includes an oil injector 1, the oil injector 1 includes an oil injection nozzle 1a installed on the cylinder 3, and a housing 1b communicated with the oil injection nozzle 1a through an oil pipe , the plunger chamber 1c arranged in the housing 1b, the oil discharge valve assembly 1l arranged in the housing 1b and above the plunger chamber 1c, the oil inlet valve assembly arranged on both sides of the plunger chamber 1c port 1d and oil return port 1e, the plunger 1f installed in the plunger cavity 1c, the tappet 1g with a roller at the lower end and the camshaft 1h connected with the roller transmission, the bottom surface of the plunger 1f is provided with The socket 1f1, the upper end of the tappet 1g is inserted into the socket 1f1, and the position corresponding to the oil return port 1e on the side wall of the upper end of the plunger 1f is provided with a vertically arranged valve that communicates with the plunger chamber 1c The zero oil volume passage 1f2 of the zero oil volume passage 1f2 is provided with an oil volume adjustment groove 1f3 obliquely along the circumferential direction, and the oil volume adjustment groove 1f3 communicates with the lower part of the zero oil volume passage 1f2; the housing The position corresponding to the lower end of the plunger 1f in 1b is provided with a gear 1i that can drive the rotation of the plunger 1f, and the lower end of the plunger 1f is inserted into the gear 1i so that it can move up and down. The position corresponding to the gear 1i is provided with a rack 1j that drives the gear 1i to rotate, and one end of the rack 1j is connected to a driving device 1k, and the driving device 1k is controlled by a control unit 2, and the control unit 2 can be configured according to The working conditions of the engine control the driving device 1k in real time to drive the rack 1j to move, so that the gear 1i rotates to adjust the rotational position of the plunger 1f. By adding a zero oil volume passage 1f2 and an oil volume adjustment groove 1f3 on the side wall of the plunger 1f, and using the control unit 2 to control the driving device 1k to drive the rack 1j to move in real time, the gear 1i is rotated and adjusted The technical solution of the rotation position of the plunger 1f achieves the purpose of automatically adjusting the oil injection amount according to the actual working conditions of the engine, and has a simple structure and low cost.

The above-mentioned rack 1j is movably inserted in the housing 1b in a lateral direction. A key 1f5 is provided on the outer wall of the lower end of the plunger 1f, and the lower end of the plunger 1f is inserted into the gear 1i so that it can move up and down through the key 1f5. The gear 1i is positioned and installed in the housing 1b through a retaining ring 1m. Of course, other structures can also be used to ensure that the gear 1i can only rotate at a fixed position. The middle part of the plunger 1f is provided with a sealing platform 1f4 whose diameter matches the diameter of the plunger cavity 1c, so as to ensure the sealing performance of the plunger cavity 1c. The channel width of the zero oil volume channel 1f2 matches the caliber of the oil return port 1e. The channel length of the zero oil volume channel 1f2 is equal to or greater than the maximum stroke of the plunger 1f, so as to ensure that the oil injector 1 does not fill oil when the rotation position of the plunger 1f is at the zero oil injection position. The driving device 1k is an iron-absorbing switch. Of course, other power devices such as cylinders can also be used.

The control unit 2 includes a controller 2a, a sensor 2b connected to the signal input end of the controller 2a, a human-computer interaction unit 2c connected to the signal end of the controller 2a, and a power input port connected to the controller 2a. The connected uninterruptible power supply 2d and the charger 2e connected with the power input port of the uninterruptible power supply 2d, the signal output port of the controller 2a and the power output port of the uninterruptible power supply 2d are respectively connected with the driving device The signal input end of the 1k control circuit is connected with the power input port. The output signal of the sensor 2b includes the internal combustion engine crank angle signal and rotational speed signal of the angle encoder sensor, the internal combustion engine load signal from the load indicating sensor, the sulfur content of the fuel, the running-in state of the cylinder liner and the piston group and other digital signals.

According to the set control mode, the above-mentioned control unit 2 receives the internal combustion engine crank angle signal and rotational speed signal from the angle encoder sensor, the internal combustion engine load signal from the load indicating sensor, the sulfur content of the fuel, the running-in state of the cylinder liner and the piston group and other digital signals. , the optimal oil supply amount is given after calculation, and then the timing and amount of action of the iron-absorbing switch are controlled to realize accurate injection of cylinder oil. Moreover, the oil injection quantity and oil injection timing can be automatically or manually adjusted on the man-machine interaction panel according to the working conditions of the diesel engine as required. The working principle of the control unit 2 and the circuit belongs to the usual design of those skilled in the art, and will not be repeated here.

The principle of changing the oil injection quantity of this lubrication system is as follows:

1) Zero oil injection volume:

At this time, the plunger 1f rotates to the position where the zero oil passage 1f2 on it is aligned with the oil return port 1e, because the plunger cavity 1c always passes through the The zero oil passage 1f2 communicates with the oil return port 1e, so the oil pressure in the plunger cavity 1c is always the same as the oil pressure in the oil return port 1e (low oil pressure), therefore, the The oil injector 1 cannot realize the oil injection, that is, the oil injection quantity is zero (see Fig. 7);

2) Middle oil injection volume:

At this time, the plunger 1f rotates to the position where the oil volume adjustment groove 1f3 on it faces the oil return port 1e, so that during the upward movement of the plunger 1f from the lowest position to the highest position, the The plunger 1f will pressurize the oil in the plunger cavity 1c to realize oil injection only at the initial stage; position, since the plunger chamber 1c communicates with the oil return port 1e through the zero oil volume passage 1f2 and the oil volume adjustment groove 1f3, the high-pressure oil in the plunger chamber 1c quickly passes through the When the oil return port 1e drops to the low-pressure oil state, the oil injector 1 cannot realize oil injection; therefore, in the entire stroke of the plunger 1f, oil can only be injected at the beginning stage, so that by turning the plunger 1f, Adjust the position of the obliquely arranged oil volume adjustment groove 1f3 towards the oil return port 1e, and change the pressurization stroke of the plunger 1f to achieve arbitrary adjustment of the oil injection volume (see Figure 6);

3) Maximum oil injection volume:

At this time, the plunger 1f rotates to a position where the side wall not provided with the zero oil volume channel 1f2 or the oil volume adjustment groove 1f3 is aligned with the oil return port 1e, since the plunger 1f During the up and down movement, the plunger cavity 1c is never connected with the oil return port 1e, so the plunger 1f can always pressurize the oil in the plunger cavity 1c during the entire upward movement , to achieve the maximum amount of oil injection (see Figure 5).

Working process of the present invention is as follows:

First, the tappet 1g moves up and down under the rotation of the camshaft 1h; at the same time, the tappet 1g drives the plunger 1f to move upward, when the top surface of the plunger 1f rises to the When the oil port 1d and the oil return port 1e are above, the side wall of the plunger 1f will block the communication between the oil inlet 1d and the oil return port 1e and the plunger cavity 1c, and the plunger 1f will start to The oil in the plunger chamber 1c is pressurized, and when the oil pressure in the plunger chamber 1c exceeds the set value of the oil discharge valve assembly 1l, the high-pressure oil will pass through the oil discharge valve assembly 1l, the oil pipe and The oil injection nozzle 1a injects oil into the cylinder 3; when the tappet 1g moves downward, the plunger 1f moves upward together with the tappet 1g under the joint action of the oil pressure and gravity in the plunger chamber 1c. When the top surface of the plunger 1f drops below the oil inlet 1d, the oil inlet 1d communicates with the plunger chamber 1c, and the oil in the oil supply unit 4 passes through the The oil inlet 1d enters the plunger cavity 1c to fill the oil; during the operation of the engine, the control unit 2 can control the driving device 1k to drive the rack in real time according to the actual working conditions of the engine 1j moves, so that the gear 1i rotates to adjust the rotation position of the plunger 1f to realize the adjustment of the oil injection amount.

In the present invention, the zero oil volume passage 1f2 and the oil volume adjustment groove 1f3 are added on the side wall of the plunger 1f, and the control unit 2 is used to control the driving device 1k to drive the rack 1j to move in real time, so that the gear 1i The technical solution of rotating and adjusting the rotating position of the plunger 1f achieves the purpose of automatically adjusting the oil injection amount according to the actual working conditions of the engine, and has a simple structure and low cost.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (8)

1. an automatically controlled filling pump cylinder lubricating system, comprise oil gun (1), described oil gun (1) comprises the pump nozzle (1a) being arranged on cylinder (3), the housing (1b) being communicated with described pump nozzle (1a), be arranged on the plunger cavity (1c) in described housing (1b), be arranged on filler opening (1d) and the return opening (1e) of described plunger cavity (1c) both sides, be arranged on the plunger (1f) in described plunger cavity (1c), the tappet (1g) of lower end band roller and the camshaft (1h) being in transmission connection with described roller, described plunger (1f) bottom surface is provided with socket (1f1), described tappet (1g) upper end is inserted in described socket (1f1), it is characterized in that the position of corresponding described return opening (1e) on the sidewall of described plunger (1f) upper end is provided with the zero oil mass passage (1f2) being communicated with described plunger cavity (1c) of vertical layout, described zero oil mass passage (1f2) bottom is the oblique control slot (1f3) that is provided with along the circumferential direction, described control slot (1f3) is communicated with described zero oil mass passage (1f2) bottom, in described housing (1b), the position of corresponding described plunger (1f) lower end is provided with the gear (1i) that can drive described plunger (1f) to rotate, described plunger (1f) lower end can be inserted in described gear (1i) up or down, the position of the upper corresponding described gear (1i) of described housing (1b) is provided with the tooth bar (1j) that drives described gear (1i) to rotate, described tooth bar (1j) one end is connected with drive unit (1k), described drive unit (1k) is controlled by control unit (2), described control unit (2) can be controlled in real time described drive unit (1k) according to engine operating condition and drive described tooth bar (1j) mobile, thereby make described gear (1i) rotate the pivotal position of adjusting described plunger (1f).

2. automatically controlled filling pump cylinder lubricating system according to claim 1, is characterized in that described tooth bar (1j) is laterally actively plugged on described housing (1b).

3. automatically controlled filling pump cylinder lubricating system according to claim 1, it is characterized in that described plunger (1f) lower end outer wall is provided with key (1f5), described plunger (1f) lower end can be inserted in described gear (1i) up or down by described key (1f5).

4. automatically controlled filling pump cylinder lubricating system according to claim 1, is characterized in that described gear (1i) passes through back-up ring (1m) location and installation in described housing (1b).

5. automatically controlled filling pump cylinder lubricating system according to claim 1, is characterized in that described plunger (1f) middle part is provided with the sealing platform (1f4) that diameter matches with the diameter of described plunger cavity (1c).

6. automatically controlled filling pump cylinder lubricating system according to claim 1, is characterized in that the channel width of described zero oil mass passage (1f2) matches with the bore of described return opening (1e).

7. automatically controlled filling pump cylinder lubricating system according to claim 1, is characterized in that the passage length of described zero oil mass passage (1f2) equals to be greater than the range of described plunger (1f).

8. automatically controlled filling pump cylinder lubricating system according to claim 1, is characterized in that described drive unit (1k) is for inhaling iron switch.