Automatic grease injection and rapid calibration method for pulse type flowmeter

Abstract

The present application relates to the technical field of calibration, and relates to an automatic grease injection and rapid calibration method for a pulse type flowmeter. The method comprises the following steps: setting a first grease injection weight, obtaining a first pulse number of the pulse type flowmeter according to a first coefficient; starting a grease injection program to inject grease, and stopping the grease injection when the first pulse number is reached during the grease injection process; after the grease injection is stopped, obtaining a second pulse number and a second grease injection weight of the grease injection process; determining whether the difference between the first grease injection weight and the second grease injection weight is greater than a required threshold value, and if yes, executing the next step; obtaining a lag pulse number according to the first pulse number and the second pulse number; obtaining a second coefficient by using the lag pulse number, the first pulse number, the second pulse number and the first coefficient according to a first rule; and obtaining a third pulse number of the pulse type flowmeter according to the second coefficient, and ending the calibration. Thus, the problem that the actual grease injection amount does not match the demand of each bearing when the pulse type flowmeter is injected with grease in the use process is solved.

Description

Technical Field

[0001] This invention relates to the field of pulse flow meter calibration technology, and more specifically, to an automatic grease injection rapid calibration method for pulse flow meters. Background Technology

[0002] Currently, grease injection for bearings in automotive drive shafts generally employs an automatic control system. This system controls a pulse flow meter for grease injection, which is relatively simple. However, this lubrication method suffers from inaccuracies due to variations in grease quality and operating temperature between different batches. This inaccuracy in the theoretical coefficient k1 of the pulse flow meter, which indirectly affects the control system's control of the grease injection valve, results in discrepancies between the actual grease injection amount and the bearing's requirements. This can lead to grease splattering or insufficient lubrication, causing inconvenience for later maintenance. Summary of the Invention

[0003] To address the problem that the actual amount of grease injected into a pulse flow meter does not match the required amount for each bearing due to variations in the quality of different batches of grease and the ambient temperature of the grease, this invention provides an automatic grease injection and rapid calibration method for pulse flow meters.

[0004] An automatic grease injection and rapid calibration method for a pulse flow meter includes:

[0005] Step S1: Set the first grease injection weight m1, and obtain the first pulse number n1 of the pulse flow meter according to the first coefficient k1;

[0006] Step S2: Start the grease injection program, control the pulse flow meter to inject grease, and when the pulse flow meter reaches the first pulse count n1 during the grease injection process, control the pulse flow meter to stop injecting grease.

[0007] Step S3: After the pulse flow meter stops injecting grease, obtain the second pulse number n2 and the second grease weight m2 during the grease injection process of the pulse flow meter.

[0008] Step S4: If the difference between the first injection weight m1 and the second injection weight m2 is greater than the required threshold, then proceed to step S5.

[0009] Step S5: Obtain the number of delayed pulses a based on the first pulse number n1 and the second pulse number n2;

[0010] Step S6: Obtain the second coefficient k2 of the pulse flow meter. The second coefficient k2 is obtained by the number of hysteresis pulses a, the number of first pulses n1, the number of second pulses n2, and the first coefficient k1 through the first rule.

[0011] Step S7: Obtain the third pulse number n3 of the pulse flow meter based on the second coefficient k2, and the calibration is complete.

[0012] In some embodiments, step S4 further includes: determining whether the difference between the first injection weight m1 and the second injection weight m2 is greater than a required threshold; if not, terminating the calibration.

[0013] In some embodiments, in step S6, the first rule is: Or, the first rule is: .

[0014] In some embodiments, in step S1, the first pulse number n1 is obtained by the first grease injection weight m1 and the first coefficient k1 through a second rule.

[0015] In some embodiments, the second rule is: .

[0016] In some embodiments, in step S7, the third pulse number n3 is obtained by the first grease injection weight m1, the number of hysteresis pulses a, and the second coefficient k2 through a third rule.

[0017] In some embodiments, the third rule is: .

[0018] To address the problem of mismatch between the actual grease injection volume and the bearing requirements during grease injection in existing pulse flow meters due to variations in grease quality and operating temperature between different batches, this invention offers the following advantages:

[0019] Through the technical solution of this invention, when the pulse flow meter uses different batches of lubricating grease or different ambient temperatures, the pulse flow meter can be quickly calibrated by grease injection using a set calibration method, so that the amount of grease injected into the pulse flow meter is within a reasonable range when grease is injected again. Attached Figure Description

[0020] Figure 1 A flowchart of an automatic grease injection and rapid calibration method for a pulse flow meter is shown. Detailed Implementation

[0021] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0022] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0023] This embodiment discloses an automatic grease injection and rapid calibration method for a pulse flow meter, such as... Figure 1 As shown, the automatic grease injection and rapid calibration method for the pulse flow meter includes:

[0024] Step S1: Set the first grease injection weight m1, and obtain the first pulse number n1 of the pulse flow meter according to the first coefficient k1. The first pulse number n1 is obtained from the first grease injection weight m1 and the first coefficient k1 through a second rule, which is: In this application, by setting a certain mass of lubricating grease to be injected (setting the first grease injection weight m1), the second rule can be used to calculate the theoretical number of pulses (i.e. the first pulse number n1) of the pulse flow meter during grease injection when the pulse flow meter is first used with a certain type of lubricating grease under the current ambient temperature. This is done by using the theoretical setting coefficient (i.e., the first coefficient k1) of the pulse flow meter. This allows for timely control of the grease injection process of the pulse flow meter.

[0025] Step S2: Start the grease injection program and control the pulse flow meter to inject grease. Specifically, the control system opens the grease injection valve to facilitate the flow of lubricating grease inside the pulse flow meter, continuously recording the actual number of pulses passed during the flow. When the pulse flow meter reaches the first pulse count n1 during the grease injection process, the system stops the grease injection. In this application, after calculating the first pulse count n1 for the current pre-injected grease weight m1 using the above method, the grease injection program can be started through the control system, thereby controlling the pulse flow meter to inject grease into a container. When the control system detects that the pulse flow meter has injected grease to the first pulse count n1 during the grease injection process, it can control the pulse flow meter to stop the grease injection. At this time, the control system closes the grease injection valve. During the valve closure process, some lubricating grease still flows through the valve into the container, resulting in an additional number of pulses of lubricating grease injected beyond the theoretical pulse count.

[0026] Step S3: After the pulse flow meter stops grease injection, obtain the second pulse number n2 and the second grease weight m2 of the pulse flow meter grease injection process; wherein, when the pulse flow meter grease injection is stable and no more lubricating grease flows out, the actual pulse number (i.e., the second pulse number n2) of the pulse flow meter grease injection process can be obtained through the control system, and the actual grease weight (i.e., the second grease weight m2) of this pulse flow meter grease injection process can be obtained by weighing.

[0027] Step S4: If the difference between the first grease weight m1 and the second grease weight m2 is greater than the required threshold, then proceed to step S5. In this application, the difference between the first grease weight m1 and the second grease weight m2 can be used to determine whether the grease injection effect of the pulse flow meter is reasonable. The required threshold is the value within the grease injection tolerance range that the bearing can be required in the assembly process. When the difference between the first grease weight m1 and the second grease weight m2 is greater than the required threshold, it indicates that the value of the first coefficient k1 during this grease injection is unreasonable for this batch of lubricating grease and the current ambient temperature conditions. That is, if grease injection continues using the first coefficient k1, there will inevitably be a problem of the actual lubrication grease amount being too much or too little compared to the demand of each bearing. Therefore, the value of the first coefficient k1 needs to be calibrated.

[0028] Step S5: Obtain the hysteresis pulse number a based on the first pulse number n1 and the second pulse number n2. In this application, the hysteresis pulse number a after the valve of the pulse flowmeter is closed can be obtained through the difference between the first pulse number n1 and the second pulse number n2. Therefore, when it is necessary to accurately control the set lubricating grease injection amount to be equal to the actual lubricating grease injection amount after grease injection through the pulse flowmeter, the grease injection process of the pulse flowmeter can be controlled to stop grease injection when the pulse number is n1-a. At this time, when the set lubricating grease injection amount is guaranteed to be equal to the actual lubricating grease injection amount, the calibration of the first coefficient k1 of the pulse flowmeter can be completed.

[0029] Step S6: Obtain the second coefficient k2 of the pulse flow meter. The second coefficient k2 is obtained by using the number of hysteresis pulses a, the number of first pulses n1, the number of second pulses n2, and the first coefficient k1 according to a first rule. In step S6, the first rule is: Or, the first rule is: In this application, since the aforementioned grease injection process of this type of pulse flowmeter can complete the calibration of the first coefficient k1 of the pulse flowmeter when the number of pulses reaches n1-a, the first rule is taken as follows: Formula 1 can be derived immediately:

[0030] (Formula 1);

[0031] Therefore, the above formula can be used to derive... To obtain the second coefficient k2 after calibration of this type of pulse flowmeter.

[0032] Step S7: Obtain the third pulse number n3 of the pulse flow meter based on the second coefficient k2, and the calibration is complete. In step S7, the third pulse number n3 is obtained from the first grease injection weight m1, the hysteresis pulse number a, and the second coefficient k2 through a third rule. The third rule is: In this application, by setting the first grease weight m1 and the calibrated second coefficient k2, the third rule can be used to calculate the actual number of pulses calibrated during the actual grease injection of the pulse flow meter when a certain type of lubricating grease is used for the first pre-grease injection of m1 weight under the current ambient temperature. This allows for real-time control of the grease injection process of the pulse flow meter during subsequent actual grease injections.

[0033] In this embodiment, step S4 further includes: determining whether the difference between the first grease injection weight m1 and the second grease injection weight m2 is greater than a required threshold; if not, the calibration is terminated. In this application, when the difference between the first grease injection weight m1 and the second grease injection weight m2 is within a reasonable range of the required threshold, it indicates that the value of the first coefficient k1 during this grease injection is reasonable for this batch of lubricating grease and the current ambient temperature conditions. That is, continuing grease injection using the first coefficient k1 does not result in an excessive or insufficient amount of actual lubrication compared to the requirements of each bearing. Therefore, calibration of the first coefficient k1 is not required.

[0034] In summary, by following the above steps, when using different batches of lubricating grease or different ambient temperatures, the pulse flow meter can be quickly calibrated by grease injection using the set calibration method, ensuring that the amount of grease injected is within a reasonable range when the pulse flow meter is re-energized.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for automatic grease injection and fast calibration of a pulse-type flowmeter, characterized in that, The method comprises: Step S1, setting a first grease injection weight m1, and obtaining a first pulse number n1 of the pulse type flowmeter according to a first coefficient k1; Step S2, starting a grease injection program, controlling the pulse type flowmeter to inject grease, and obtaining the first pulse number n1 of the pulse type flowmeter in the grease injection process, and controlling the pulse type flowmeter to stop injecting grease; Step S3, after the pulse type flowmeter stops injecting grease, obtaining a second pulse number n2 and a second grease injection weight m2 in the grease injection process of the pulse type flowmeter; Step S4, determining whether the difference between the first grease injection weight m1 and the second grease injection weight m2 is greater than a required threshold value, and if yes, executing Step S5; Step S5, obtaining a lag pulse number a according to the first pulse number n1 and the second pulse number n2; Step S6, obtaining a second coefficient k2 of the pulse type flowmeter, wherein the second coefficient k2 is obtained by the lag pulse number a, the first pulse number n1, the second pulse number n2 and the first coefficient k1 through a first rule; Step S7, obtaining a third pulse number n3 of the pulse type flowmeter according to the second coefficient k2, and ending the calibration; In step S6, the first rule is: ; or, the first rule is: ; In Step S1, the first pulse number n1 is obtained by the first grease injection weight m1 and the first coefficient k1 through a second rule; The second rule is: ; In Step S7, the third pulse number n3 is obtained by the first grease injection weight m1, the lag pulse number a and the second coefficient k2 through a third rule; The third rule is: .

2. The method of automatic grease injection and fast calibration of a pulse-type flowmeter of claim 1, wherein, In Step S4, it is further included that if the difference between the first grease injection weight m1 and the second grease injection weight m2 is not greater than the required threshold value, the calibration is terminated.

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