Lubricating control method, lubricating control system and mixer truck

Abstract

The invention relates to the field of engineering machinery, and discloses a lubrication control method, a lubrication control system and a mixer truck, the mixer truck comprises an oil supply mechanism and a sealing piece arranged between the discharging end of a feeding hopper and a feeding port of a mixing drum, the oil supply mechanism is used for supplying lubricating oil to the sealing piece, and the lubrication control method comprises the steps that the rotating speed of the mixing drum is obtained; adjusting the oil supply frequency and / or single oil supply duration of an oil supply mechanism according to the rotating speed of the mixing drum; acquiring the friction surface temperature of the sealing element; and the oil supply rate of the oil supply mechanism is adjusted according to the friction surface temperature of the sealing piece. According to the lubrication control method, the oil supply amount of the oil supply mechanism can be accurately adjusted, so that the oil supply amount of the oil supply mechanism can be accurately matched with the rotating speed of the mixing drum and the temperature of the friction surface of the sealing element, the lubrication effect can be effectively improved, abrasion between the sealing element and the feeding opening of the mixing drum is remarkably relieved, and the service life of the mixing drum is prolonged. The service life of each part is greatly prolonged, and meanwhile, the waste of lubricating oil is also avoided.

Description

Technical Field

[0001] The present invention belongs to the field of engineering machinery, and in particular, relates to a lubrication control method, a lubrication control system and a mixer truck. Background Art

[0002] When a mixer truck is traveling on uneven roads such as muddy, bumpy, and sloped roads, the concrete mortar in the mixing drum is likely to overflow from the gap between the discharge end of the feed hopper and the feed port of the mixing drum, spill or even condense on the road surface, polluting the environment; therefore, a seal such as a sealing rubber sheet is usually set in the gap between the discharge end of the feed hopper and the feed port of the mixing drum to prevent the overflow of the concrete mortar, and in order to reduce the wear between the seal and the feed port of the mixing drum, an oil supply mechanism for supplying lubricating oil to the seal is usually set, and the lubricating oil flows out from the friction surface of the seal to play a lubricating role; however, in actual application, there will be a problem of too much lubricating oil, wasting heat conduction resources, or too little lubricating oil, resulting in poor lubrication effect. Summary of the invention

[0003] In view of the above-mentioned deficiencies or defects in the prior art, the present invention provides a lubrication control method, a lubrication control system and a mixer truck, which can accurately regulate the amount of lubricating oil supplied to the seal, improve the lubrication effect and avoid waste of lubricating oil.

[0004] To achieve the above object, the present invention provides a lubrication control method for a mixer truck, the mixer truck comprising an oil supply mechanism and a seal arranged between a discharge end of a feed hopper and a feed inlet of a mixing drum, the oil supply mechanism being used to supply lubricating oil to the seal, the lubrication control method comprising:

[0005] Obtaining the rotation speed of the mixing drum;

[0006] According to the rotation speed of the mixing drum, adjusting the oil supply frequency and / or the single oil supply duration of the oil supply mechanism;

[0007] Obtaining the friction surface temperature of the seal;

[0008] The oil supply rate of the oil supply mechanism is adjusted according to the friction surface temperature of the sealing element.

[0009] Optionally, adjusting the oil supply frequency and / or single oil supply duration of the oil supply mechanism according to the rotation speed of the mixing drum includes:

[0010] When it is determined that the rotation speed of the mixing drum is less than or equal to a preset standard rotation speed, adjusting the single oil supply duration of the oil supply mechanism according to the rotation speed of the mixing drum, so that the single oil supply duration of the oil supply mechanism increases with an increase in the rotation speed of the mixing drum and decreases with a decrease in the rotation speed of the mixing drum;

[0011] When it is determined that the rotation speed of the mixing drum is greater than the standard rotation speed, the oil supply frequency of the oil supply mechanism is adjusted according to the rotation speed of the mixing drum, so that the oil supply frequency of the oil supply mechanism increases with increasing rotation speed of the mixing drum and decreases with decreasing rotation speed of the mixing drum.

[0012] Optionally, when determining that the rotation speed of the mixing drum is less than or equal to a preset standard rotation speed, adjusting the single oil supply duration of the oil supply mechanism according to the rotation speed of the mixing drum so that the single oil supply duration of the oil supply mechanism increases with an increase in the rotation speed of the mixing drum and decreases with a decrease in the rotation speed of the mixing drum comprises:

[0013] The single oil supply duration of the oil supply mechanism is adjusted according to the following formula:

[0014] t=t0(1+α(n-n0));

[0015] Among them, t is the single oil supply time of the oil supply mechanism, t0 is the standard single oil supply time, α is the time coefficient, n is the rotation speed of the mixing drum, and n0 is the standard rotation speed.

[0016] Optionally, when it is determined that the rotation speed of the mixing drum is greater than the standard rotation speed, adjusting the oil supply frequency of the oil supply mechanism according to the rotation speed of the mixing drum so that the oil supply frequency of the oil supply mechanism increases with an increase in the rotation speed of the mixing drum and decreases with a decrease in the rotation speed of the mixing drum comprises:

[0017] The oil supply frequency of the oil supply mechanism is adjusted according to the following formula:

[0018] f=f0(1+β(n-n0));

[0019] Among them, f is the oil supply frequency of the oil supply mechanism, f0 is the standard oil supply frequency, β is the frequency coefficient, n is the rotation speed of the mixing drum, and n0 is the standard rotation speed.

[0020] Optionally, adjusting the oil supply rate of the oil supply mechanism according to the friction surface temperature of the seal comprises:

[0021] According to the difference between the friction surface temperature of the seal and the preset target temperature, the oil supply rate of the oil supply mechanism is adjusted until the difference is equal to 0, so that the oil supply mechanism maintains the current oil supply rate.

[0022] Optionally, adjusting the oil supply rate of the oil supply mechanism according to the difference between the friction surface temperature of the seal and a preset target temperature until the difference is equal to 0, so that the oil supply mechanism maintains the current oil supply rate includes:

[0023] The oil supply rate of the oil supply mechanism is adjusted according to the following formula:

[0024] v=v0+γ(T-T1)+δ∫(T-T1)dt;

[0025] Wherein, v is the oil supply rate of the oil supply mechanism, v0 is the standard oil supply rate, T is the friction surface temperature of the seal, T1 is the target temperature; γ is the proportional coefficient; δ is the integral coefficient.

[0026] Optionally, the lubrication control method further includes:

[0027] Obtaining the oil storage chamber pressure of the seal;

[0028] When it is determined that the pressure in the oil storage chamber of the seal is greater than the preset pressure, the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism are increased to the preset injection frequency, preset single injection duration and preset injection rate respectively, until the pressure in the oil storage chamber of the seal is less than or equal to the preset pressure.

[0029] The present invention also provides a lubrication control system, comprising:

[0030] Speed ​​sensor, used to detect the speed of the mixing drum;

[0031] Temperature sensor, used to detect the friction surface temperature of the seal;

[0032] The processor is configured to execute the lubrication control method described above.

[0033] Optionally, the lubrication control system further comprises a pressure sensor, and the pressure sensor is used to detect the pressure of the oil storage chamber of the seal.

[0034] The present invention also provides a mixer truck, comprising the above-mentioned lubrication control system.

[0035] Through the above technical scheme, in the lubrication control method of the present invention, the oil supply frequency and / or the single oil supply duration of the oil supply mechanism is adjusted according to the rotational speed of the mixing drum, and the oil supply rate of the oil supply mechanism is adjusted according to the friction surface temperature of the seal. In this way, the oil supply amount of the oil supply mechanism can be accurately adjusted so that the oil supply amount of the oil supply mechanism can be accurately adapted to the rotational speed of the mixing drum and the friction surface temperature of the seal, thereby effectively improving the lubrication effect, significantly reducing the wear between the seal and the feed port of the mixing drum, greatly improving the service life of each component, and at the same time, avoiding the waste of lubricating oil.

[0036] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0038] In the attached picture:

[0039] Figure 1 It is a schematic diagram of the matching structure of the feed hopper and the mixing drum;

[0040] Figure 2 A block diagram of a lubrication control system in one embodiment of the present invention;

[0041] Figure 3 A flow chart of a lubrication control method in one embodiment of the present invention;

[0042] Figure 4 The present invention is a flowchart of a lubrication control method in another embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 1 Oil supply mechanism

[0045] 2 Feed hopper

[0046] 3 Mixing drum

[0047] 4 Speed ​​sensor

[0048] 5. Temperature Sensor

[0049] 6 Processor

[0050] 7. Pressure Sensor DETAILED DESCRIPTION

[0051] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0053] In the present invention, unless otherwise specified, the directions or positional relationships indicated by directional words such as "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0054] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0055] See attached Figure 3 As shown, the first exemplary embodiment of the present invention provides a lubrication control method for a mixer truck, the mixer truck comprising an oil supply mechanism 1 and a seal disposed between a discharge end of a feed hopper 2 and a feed port of a mixing drum 3, the oil supply mechanism 1 being used to supply lubricating oil to the seal, and the lubrication control method comprising the following steps:

[0056] Step S1. Obtaining the rotation speed of the mixing drum 3;

[0057] Step S2. According to the rotation speed of the mixing drum 3, adjusting the oil supply frequency and / or the single oil supply duration of the oil supply mechanism 1;

[0058] Step S3. Obtaining the friction surface temperature of the seal;

[0059] Step S4: adjusting the oil supply rate of the oil supply mechanism 1 according to the friction surface temperature of the seal.

[0060] It can be understood that the order of step S3 and step S4 can be swapped with step S1 and step S2 or performed simultaneously.

[0061] Specifically, refer to the attached Figure 1 As shown, the mixing drum 3 in this embodiment includes a mixing drum body and a guide cylinder fixed at the barrel mouth of the mixing drum body, the guide cylinder forms a feed port of the mixing drum 3, the discharge end of the feed hopper 2 extends into the guide cylinder, the seal can be a sealing rubber plate and is fixedly sleeved on the discharge end of the feed hopper 2, the friction surface of the seal is in contact with the inner wall of the guide cylinder, the oil supply mechanism 1 includes an oil supply pump, a diverter block and a plurality of oil supply pipes connected in sequence, the plurality of oil supply pipes are connected to the oil storage cavity of the seal, the seal is circumferentially provided with a plurality of oil supply holes or oil supply grooves connected to the oil storage cavity to form a plurality of oil supply points, it can be understood that the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism are the oil supply frequency, single oil supply duration and oil supply rate of the oil supply pump.

[0062] Specifically, refer to the attached Figure 2 As shown, the mixer truck also includes a processor 6, a speed sensor 4 and a temperature sensor 5. The speed sensor 4 is used to detect the speed of the mixer drum 3, and the temperature sensor 5 is used to detect the friction surface temperature of the seal. The processor 6 is respectively connected to the speed sensor 4, the temperature sensor 5 and the oil supply mechanism 1 and is configured to execute the lubrication control method in this embodiment.

[0063] It can be understood that in actual application, when the mixer truck is operating normally, that is, the rotation speed of the mixing drum 3 is the standard rotation speed, and the friction surface temperature of the seal is the normal temperature, at this time, the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism 1 are the standard oil supply frequency, standard single oil supply duration and standard oil supply rate respectively. When the rotation speed of the mixing drum 3 changes or the friction surface temperature of the seal changes, the processor 6 will send a corresponding control signal to the oil supply mechanism 1 to adjust the oil supply frequency, single oil supply duration or oil supply rate of the oil supply mechanism 1. In this way, the oil supply amount of the oil supply mechanism 1 can be accurately adjusted so that the oil supply amount of the oil supply mechanism 1 can be accurately matched with the rotation speed of the mixing drum 3 and the friction surface temperature of the seal, that is, the automatic adjustment of the oil supply amount of the oil supply mechanism 1 is realized, the lubrication effect is effectively improved, the wear between the seal and the feed port of the mixing drum 3 is significantly reduced, the service life of each component is greatly improved, and at the same time, the waste of lubricating oil is avoided.

[0064] In an optional embodiment, step S2 may include:

[0065] According to the rotation speed of the mixing drum 3, the single oil supply duration and the oil supply frequency of the oil supply mechanism 1 are adjusted so that the single oil supply duration and the oil supply frequency of the oil supply mechanism 1 increase with the increase of the rotation speed of the mixing drum 3 and decrease with the decrease of the rotation speed of the mixing drum 3.

[0066] In this embodiment, the single oil supply duration and the oil supply frequency of the oil supply mechanism 1 are adjusted simultaneously so that the oil supply amount of the oil supply mechanism 1 can be matched with the rotation speed of the mixing drum 3 in a timely manner.

[0067] Specifically, the single oil supply duration and oil supply frequency of the oil supply mechanism 1 can be set to have a positive correlation function relationship with the rotation speed of the mixing drum 3. In actual application, the processor 6 adjusts the single oil supply duration and oil supply frequency of the oil supply mechanism 1 according to the pre-stored positive correlation function relationship and the rotation speed of the mixing drum 3.

[0068] Of course, in other embodiments, the processor 6 can adjust the single oil supply duration or oil supply frequency of the oil supply mechanism 1 according to the rotation speed of the mixing drum 3 to adjust the oil supply amount of the oil supply mechanism 1. For details, please refer to the subsequent embodiments.

[0069] In another preferred embodiment, step S2 may include:

[0070] When it is determined that the rotation speed of the mixing drum 3 is less than or equal to the preset standard rotation speed, the single oil supply time of the oil supply mechanism 1 is adjusted according to the rotation speed of the mixing drum 3, so that the single oil supply time of the oil supply mechanism 1 increases with the increase of the rotation speed of the mixing drum 3 and decreases with the decrease of the rotation speed of the mixing drum 3;

[0071] When it is determined that the rotation speed of the mixing drum 3 is greater than the standard rotation speed, the oil supply frequency of the oil supply mechanism 1 is adjusted according to the rotation speed of the mixing drum 3 so that the oil supply frequency of the oil supply mechanism 1 increases with increasing rotation speed of the mixing drum 3 and decreases with decreasing rotation speed of the mixing drum 3 .

[0072] It can be understood that when the oil supply frequency is low, uneven oil supply will occur, that is, there will be a partial area between the seal and the outlet of the mixing drum 3 that lacks lubricating oil for a long time. Therefore, in this embodiment, when the processor 6 determines that the rotation speed of the mixing drum 3 is less than or equal to the preset standard rotation speed based on the detection result of the speed sensor 4, a control signal is sent to the oil supply mechanism 1, so that the oil supply mechanism 1 adjusts the single oil supply duration of the oil supply mechanism 1 according to the detection result of the speed sensor 4 while keeping the oil supply frequency and the oil supply rate unchanged, so that the single oil supply duration of the oil supply mechanism 1 increases with the increase of the rotation speed of the mixing drum 3, and decreases with the decrease of the rotation speed. In this way, the oil supply amount can be matched with the rotation speed of the mixing drum 3, and at the same time, uneven oil supply can be avoided.

[0073] Specifically, when the processor 6 determines that the rotation speed of the mixing drum 3 is equal to 0, the oil supply frequency of the power supply mechanism 1 is reset to zero, that is, the oil supply mechanism 1 is shut down.

[0074] Further, when it is determined that the rotation speed of the mixing drum 3 is less than or equal to the preset standard rotation speed, adjusting the single oil supply duration of the oil supply mechanism 1 according to the rotation speed of the mixing drum 3 so that the single oil supply duration of the oil supply mechanism 1 increases with the increase of the rotation speed of the mixing drum 3 and decreases with the decrease of the rotation speed of the mixing drum 3 includes:

[0075] The single oil supply duration of the oil supply mechanism 1 is adjusted according to the following formula:

[0076] t=t0(1+α(n-n0));

[0077] Wherein, t is the single oil supply duration of the oil supply mechanism 1, t0 is the standard single oil supply duration, α is the time coefficient, n is the rotation speed of the mixing drum 3, and n0 is the standard rotation speed.

[0078] Further, when it is determined that the rotation speed of the mixing drum 3 is greater than the standard rotation speed, the oil supply frequency of the oil supply mechanism 1 is adjusted according to the rotation speed of the mixing drum 3 so that the oil supply frequency of the oil supply mechanism 1 increases with the increase of the rotation speed of the mixing drum 3 and decreases with the decrease of the rotation speed of the mixing drum 3, including:

[0079] The oil supply frequency of the oil supply mechanism 1 is adjusted according to the following formula:

[0080] f=f0(1+β(n-n0));

[0081] Among them, f is the oil supply frequency of the oil supply mechanism 1, f0 is the standard oil supply frequency, β is the frequency coefficient, n is the rotation speed of the mixing drum 3, and n0 is the standard rotation speed.

[0082] In an optional embodiment, step S4 includes:

[0083] According to the difference between the friction surface temperature of the seal and the preset target temperature, the oil supply rate of the oil supply mechanism 1 is adjusted until the difference is equal to 0, so that the oil supply mechanism 1 maintains the current oil supply rate.

[0084] In this embodiment, the processor 6 determines the difference between the friction surface temperature of the seal and the preset target temperature based on the detection result of the temperature sensor 5, and sends a control signal to the oil supply mechanism 1 so that the oil supply mechanism 1 adjusts the oil supply rate while keeping the oil supply frequency and the single oil supply duration unchanged, so that the friction surface temperature of the seal can be maintained at the preset target temperature, avoiding the impact of excessive temperature on the service life of the seal.

[0085] Further, according to the difference between the friction surface temperature of the seal and the preset target temperature, the oil supply rate of the oil supply mechanism 1 is adjusted until the difference is equal to 0, so that the oil supply mechanism 1 maintains the current oil supply rate, including:

[0086] The oil supply rate of the oil supply mechanism 1 is adjusted according to the following formula:

[0087] v=v0+γ(T-T1)+δ∫(T-T1)dt;

[0088] Among them, v is the oil supply rate of the oil supply mechanism 1, v0 is the standard oil supply rate, T is the friction surface temperature of the seal, T1 is the target temperature; γ is the proportional coefficient; δ is the integral coefficient.

[0089] In an optional embodiment, refer to the attached Figure 4 As shown, the lubrication control method also includes:

[0090] Step S5. Obtaining the oil storage cavity pressure of the seal;

[0091] Step S6. When it is determined that the pressure in the oil storage chamber of the seal is greater than the preset pressure, the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism 1 are increased to the preset injection frequency, preset single injection duration and preset injection rate respectively, until the pressure in the oil storage chamber of the seal is less than or equal to the preset pressure.

[0092] It can be understood that the order of step S5 and step S6 can be swapped with step S1 and step S2 or step S3 and step S4, or can be performed simultaneously with step S1 and step S2, or step S3 and step S4.

[0093] It is understandable that during the operation of the mixer truck, the concrete mortar in the mixing drum 3 will inevitably enter the gap between the seal and the feed port of the mixing drum 3. After a long period of accumulation, it will block the oil outlet hole of the seal and even enter the oil storage cavity of the seal through the oil outlet hole, which will seriously affect the lubrication effect. In the present embodiment, the mixer truck may further include a pressure sensor 7 for detecting the pressure of the oil storage chamber of the seal. The processor 6 is connected to the pressure sensor 7 by signal. When the processor 6 determines that the pressure of the oil storage chamber of the seal is greater than the preset pressure based on the detection result of the pressure sensor 7, a control signal is sent to the oil supply mechanism 1 to increase the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism 1 to the preset injection frequency, preset single injection duration and preset injection rate, respectively. In this way, the oil pressure in the oil storage chamber of the seal is increased, and the oil outlet hole sprays oil at a high pressure, thereby discharging the concrete mortar in the gap between the seal and the feed port of the mixing drum 3 through the lubricating oil with relatively high pressure, avoiding blockage of the oil outlet hole. In addition, the discharge of concrete mortar from the gap can improve the use environment of the seal, slow down the wear rate of the seal, and extend the service life of the seal.

[0094] Specifically, when the processor 6 determines that the pressure in the oil storage chamber of the seal is less than or equal to the preset pressure based on the detection result of the pressure sensor 7, it sends a control signal to the oil supply mechanism 1 to restore the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism 1 to the original values ​​and continue normal oil supply.

[0095] The preset values, standard values ​​and coefficients in the formula in the above embodiments can all be determined and obtained through multiple experiments.

[0096] See attached Figure 2 As shown, the second exemplary embodiment of the present invention provides a lubrication control system, comprising:

[0097] The rotation speed sensor 4 is used to detect the rotation speed of the mixing drum 3;

[0098] A temperature sensor 5, used to detect the friction surface temperature of the seal;

[0099] The processor 6 of the above embodiment is configured to execute a lubrication control method, which includes:

[0100] Obtain the rotation speed of the mixing drum 3;

[0101] According to the rotation speed of the mixing drum 3, the oil supply frequency and the single oil supply duration of the oil supply mechanism 1 are adjusted;

[0102] Obtain the friction surface temperature of the seal;

[0103] The oil supply rate of the oil supply mechanism 1 is adjusted according to the friction surface temperature of the seal.

[0104] In an optional embodiment, adjusting the oil supply frequency and single oil supply duration of the oil supply mechanism 1 according to the rotation speed of the mixing drum 3 includes:

[0105] When it is determined that the rotation speed of the mixing drum 3 is less than or equal to the preset standard rotation speed, the single oil supply time of the oil supply mechanism 1 is adjusted according to the rotation speed of the mixing drum 3, so that the single oil supply time of the oil supply mechanism 1 increases with the increase of the rotation speed of the mixing drum 3 and decreases with the decrease of the rotation speed of the mixing drum 3;

[0106] When it is determined that the rotation speed of the mixing drum 3 is greater than the standard rotation speed, the oil supply frequency of the oil supply mechanism 1 is adjusted according to the rotation speed of the mixing drum 3 so that the oil supply frequency of the oil supply mechanism 1 increases with increasing rotation speed of the mixing drum 3 and decreases with decreasing rotation speed of the mixing drum 3 .

[0107] In an optional embodiment, when it is determined that the rotation speed of the mixing drum 3 is less than or equal to a preset standard rotation speed, adjusting the single oil supply duration of the oil supply mechanism 1 according to the rotation speed of the mixing drum 3 so that the single oil supply duration of the oil supply mechanism 1 increases with the increase of the rotation speed of the mixing drum 3 and decreases with the decrease of the rotation speed of the mixing drum 3 includes:

[0108] The single oil supply duration of the oil supply mechanism 1 is adjusted according to the following formula:

[0109] t=t0(1+α(n-n0));

[0110] Wherein, t is the single oil supply duration of the oil supply mechanism 1, t0 is the standard single oil supply duration, α is the time coefficient, n is the rotation speed of the mixing drum 3, and n0 is the standard rotation speed.

[0111] In an optional embodiment, when it is determined that the rotation speed of the mixing drum 3 is greater than the standard rotation speed, adjusting the oil supply frequency of the oil supply mechanism 1 according to the rotation speed of the mixing drum 3 so that the oil supply frequency of the oil supply mechanism 1 increases with the increase of the rotation speed of the mixing drum 3 and decreases with the decrease of the rotation speed of the mixing drum 3 includes:

[0112] The oil supply frequency of the oil supply mechanism 1 is adjusted according to the following formula:

[0113] f=f0(1+β(n-n0));

[0114] Among them, f is the oil supply frequency of the oil supply mechanism 1, f0 is the standard oil supply frequency, β is the frequency coefficient, n is the rotation speed of the mixing drum 3, and n0 is the standard rotation speed.

[0115] In an optional embodiment, adjusting the oil supply rate of the oil supply mechanism 1 according to the friction surface temperature of the seal includes:

[0116] According to the difference between the friction surface temperature of the seal and the preset target temperature, the oil supply rate of the oil supply mechanism 1 is adjusted until the difference is equal to 0, so that the oil supply mechanism 1 maintains the current oil supply rate.

[0117] In an optional embodiment, according to the difference between the friction surface temperature of the seal and the preset target temperature, adjusting the oil supply rate of the oil supply mechanism 1 until the difference is equal to 0, so that the oil supply mechanism 1 maintains the current oil supply rate includes:

[0118] The oil supply rate of the oil supply mechanism 1 is adjusted according to the following formula:

[0119] v=v0+γ(T-T1)+δ∫(T-T1)dt;

[0120] Among them, v is the oil supply rate of the oil supply mechanism 1, v0 is the standard oil supply rate, T is the friction surface temperature of the seal, T1 is the target temperature; γ is the proportional coefficient; δ is the integral coefficient.

[0121] In an optional embodiment, the lubrication control system further includes a pressure sensor 7, and the pressure sensor 7 is used to detect the pressure of the oil storage cavity of the seal. The lubrication control method further includes:

[0122] Obtaining the oil storage chamber pressure of the seal;

[0123] When it is determined that the pressure in the oil storage chamber of the seal is greater than the preset pressure, the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism 1 are increased to the preset injection frequency, preset single injection duration and preset injection rate respectively, until the pressure in the oil storage chamber of the seal is less than or equal to the preset pressure.

[0124] A third exemplary embodiment of the present invention provides a mixer truck, comprising the above-mentioned lubrication control system.

[0125] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0126] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0127] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0128] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A lubrication control method for a mixer truck, the mixer truck comprising an oil supply mechanism (1) and a seal arranged between a discharge end of a feed hopper (2) and a feed inlet of a mixer drum (3), the oil supply mechanism (1) being used to supply lubricating oil to the seal, characterized in that: The lubrication control method comprises: Obtaining the rotation speed of the mixing drum (3); According to the rotation speed of the mixing drum (3), the oil supply frequency and / or the single oil supply duration of the oil supply mechanism (1) are adjusted; Obtaining the friction surface temperature of the seal; The oil supply rate of the oil supply mechanism (1) is adjusted according to the friction surface temperature of the sealing element.

2. The lubrication control method according to claim 1, characterized in that: The step of adjusting the oil supply frequency and / or the single oil supply duration of the oil supply mechanism (1) according to the rotation speed of the mixing drum (3) comprises: When it is determined that the rotation speed of the mixing drum (3) is less than or equal to a preset standard rotation speed, the single oil supply duration of the oil supply mechanism (1) is adjusted according to the rotation speed of the mixing drum (3), so that the single oil supply duration of the oil supply mechanism (1) increases with an increase in the rotation speed of the mixing drum (3), and decreases with a decrease in the rotation speed of the mixing drum (3); When it is determined that the rotation speed of the mixing drum (3) is greater than the standard rotation speed, the oil supply frequency of the oil supply mechanism (1) is adjusted according to the rotation speed of the mixing drum (3), so that the oil supply frequency of the oil supply mechanism (1) increases with an increase in the rotation speed of the mixing drum (3), and decreases with a decrease in the rotation speed of the mixing drum (3).

3. The lubrication control method according to claim 2, characterized in that: When it is determined that the rotation speed of the mixing drum (3) is less than or equal to a preset standard rotation speed, adjusting the single oil supply duration of the oil supply mechanism (1) according to the rotation speed of the mixing drum (3) so that the single oil supply duration of the oil supply mechanism (1) increases with an increase in the rotation speed of the mixing drum (3) and decreases with a decrease in the rotation speed of the mixing drum (3) comprises: The single oil supply duration of the oil supply mechanism (1) is adjusted according to the following formula: t=t0(1+α(n-n0)); Wherein, t is the single oil supply duration of the oil supply mechanism (1), t0 is the standard single oil supply duration, α is the time coefficient, n is the rotation speed of the mixing drum (3), and n0 is the standard rotation speed.

4. The lubrication control method according to claim 2, characterized in that: When it is determined that the rotation speed of the mixing drum (3) is greater than the standard rotation speed, adjusting the oil supply frequency of the oil supply mechanism (1) according to the rotation speed of the mixing drum (3) so that the oil supply frequency of the oil supply mechanism (1) increases with an increase in the rotation speed of the mixing drum (3) and decreases with a decrease in the rotation speed of the mixing drum (3) comprises: The oil supply frequency of the oil supply mechanism (1) is adjusted according to the following formula: f=f0(1+β(n-n0)); Wherein, f is the oil supply frequency of the oil supply mechanism (1), f0 is the standard oil supply frequency, β is the frequency coefficient, n is the rotation speed of the mixing drum (3), and n0 is the standard rotation speed.

5. The lubrication control method according to claim 1, characterized in that: The step of adjusting the oil supply rate of the oil supply mechanism (1) according to the friction surface temperature of the sealing element comprises: According to the difference between the friction surface temperature of the seal and the preset target temperature, the oil supply rate of the oil supply mechanism (1) is adjusted until the difference is equal to 0, so that the oil supply mechanism (1) maintains the current oil supply rate.

6. The lubrication control method according to claim 5, characterized in that: The step of adjusting the oil supply rate of the oil supply mechanism (1) according to the difference between the friction surface temperature of the seal and the preset target temperature until the difference is equal to 0, so that the oil supply mechanism (1) maintains the current oil supply rate comprises: The oil supply rate of the oil supply mechanism (1) is adjusted according to the following formula: v=v0+γ(T-T1)+δ∫(T-T1)dt; Wherein, v is the oil supply rate of the oil supply mechanism (1), v0 is the standard oil supply rate, T is the friction surface temperature of the seal, T1 is the target temperature; γ is the proportional coefficient; δ is the integral coefficient.

7. The lubrication control method according to claim 1, characterized in that: The lubrication control method further comprises: Obtaining the oil storage chamber pressure of the seal; When it is determined that the pressure of the oil storage chamber of the seal is greater than a preset pressure, the oil supply frequency, single oil supply duration and oil supply rate of the oil supply mechanism (1) are increased to a preset injection frequency, a preset single injection duration and a preset injection rate, respectively, until the pressure of the oil storage chamber of the seal is less than or equal to the preset pressure.

8. A lubrication control system, characterized in that: include: A rotation speed sensor (4) for detecting the rotation speed of the mixing drum (3); A temperature sensor (5) for detecting the temperature of the friction surface of the seal; A processor (6) is configured to execute the lubrication control method according to any one of claims 1 to 7.

9. The lubrication control system according to claim 8, characterized in that: The lubrication control system further comprises a pressure sensor (7), and the pressure sensor (7) is used to detect the pressure of the oil storage chamber of the sealing element.

10. A mixer truck, characterized in that: Comprising a lubrication control system according to claim 8 or 9.

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