Carbon fiber corrosion-resistant vacuum pump facilitating heat dissipation

Abstract

The present application relates to the technical fields of reciprocating pump, and discloses a carbon fiber corrosion-resistant vacuum pump with convenient heat dissipation, comprising: a reciprocating pump body, which comprises a pump body, a crank connecting rod mechanism, a piston, an air inlet valve and an air outlet valve, the pump body is provided with an air inlet cavity for accommodating the crank connecting rod mechanism, and a gas exchange cavity for accommodating the piston, the air inlet valve and the air outlet valve; a heat dissipation execution module, which comprises a first heat dissipation module and a second heat dissipation module. The present application realizes the differentiated and accurate heat dissipation of different working areas of the vacuum pump by setting the heat dissipation execution module, the temperature sensing module and the control module; wherein the two heat dissipation modules in the heat dissipation execution module act on the gas exchange cavity and the movable cavity respectively, cooperate with the heat dissipation fan and the air volume distribution mechanism, and can adjust the heat dissipation intensity and direction according to the actual demand; the control module adaptively selects the appropriate heat dissipation mode according to the temperature data and the preset threshold value, so as to effectively reduce the energy consumption while ensuring the normal operation of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reciprocating pump, more particularly, it relates to a carbon fiber corrosion-resistant vacuum pump facilitating heat dissipation. BACKGROUND

[0002] As an important fluid conveying equipment, the working principle of reciprocating vacuum pump mainly depends on the reciprocating movement of the piston in the pump cavity, which periodically changes the working chamber volume, so as to complete the suction and discharge process of the medium under the coordination of the inlet valve and the outlet valve. This type of pump has the advantages of high output pressure and strong self-suction capacity, and is widely used in many industrial fields such as chemical industry, pharmaceutical industry and food industry.

[0003] However, in the actual operation process, especially when dealing with medium with certain temperature for a long time, the pump body will generate significant heat due to the frequent friction of the piston, the violent impact of the valve plate and the temperature rise of the medium itself, which will cause the temperature of the pump body, especially the temperature of the gas exchange cavity region, to rise sharply. High temperature not only accelerates the aging of the seal and the failure of the lubricating oil, and even causes thermal deformation of the pump body, affects the fitting precision, and further leads to the decrease of vacuum degree, the decrease of efficiency and even the damage of the equipment. The traditional heat dissipation method is to use uniformly distributed heat dissipation fins to cooperate with a single fan for overall cooling. This method is difficult to efficiently and accurately distribute the heat dissipation to different regions of the pump body with significant temperature difference, and often has problems such as waste of cooling resources, insufficient heat dissipation in high temperature area, high energy consumption and high noise. SUMMARY

[0004] The present application provides a carbon fiber corrosion-resistant vacuum pump facilitating heat dissipation to solve the above technical problems.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] The present application provides a carbon fiber corrosion-resistant vacuum pump facilitating heat dissipation, comprising:

[0007] The reciprocating pump body comprises a pump body, a crank connecting rod mechanism, a piston, an inlet valve and an outlet valve, the pump body is provided with an inlet cavity for accommodating the crank connecting rod mechanism, and a gas exchange cavity for accommodating the piston, the inlet valve and the outlet valve;

[0008] The heat dissipation execution module includes a first heat dissipation module, a second heat dissipation module, a heat dissipation fan and a wind volume distribution mechanism, the first heat dissipation module is arranged at a position corresponding to the air exchange cavity on the outer side of the pump body, the second heat dissipation module is arranged at a position corresponding to the activity cavity on the outer side of the pump body, and the heat dissipation fan is connected with the first heat dissipation module; the wind volume distribution mechanism is arranged between the heat dissipation fan and the first heat dissipation module, and has at least two working states: in the first working state, the air flow generated by the heat dissipation fan is all guided to the first heat dissipation module; in the second working state, part of the air flow is shunted and guided to the second heat dissipation module.

[0009] The temperature sensing module is used for acquiring the temperature in the activity cavity and the air exchange cavity in real time.

[0010] The control module is signal-connected with the temperature sensing module, the heat dissipation fan and the wind volume distribution mechanism, and is configured to control the rotating speed of the heat dissipation fan and the working state of the wind volume distribution mechanism according to the received temperature data, so as to realize differential and accurate heat dissipation for different working areas of the pump body.

[0011] Preferably, the first heat dissipation module includes four vertically arranged heat dissipation fins one corresponding to the four sides of the air exchange cavity of the pump body, and a mounting cover fixed at the top ends of the four heat dissipation fins, the heat dissipation fan is detachably connected with the mounting cover, and the wind volume distribution mechanism is arranged in the mounting cover.

[0012] Preferably, the second heat dissipation module includes heat dissipation fins two distributed on one side of the activity cavity of the pump body, and the heat dissipation fins two are transversely arranged.

[0013] Preferably, the wind volume distribution mechanism includes a linear telescopic source, a telescopic air inlet cover and a blowing head; the air inlet cover is connected with the telescopic end of the linear telescopic source, and the opening of the air inlet cover faces the heat dissipation fan; the blowing head is arranged on the left side of the pump body and is aligned with the second heat dissipation module, and is in communication with the air inlet cover through an air inlet pipe.

[0014] The linear telescopic source is used to drive the air inlet cover to be telescoped, so as to change the area of the air inlet cover intercepting the air flow, thereby realizing the distribution of the wind volume.

[0015] Preferably, the linear telescopic source is an electric push rod, which is fixedly arranged on the pump body.

[0016] Preferably, the air inlet cover is made of rubber, and the telescopic posture of the air inlet cover is adapted to the gap between the mounting cover and the pump body.

[0017] Preferably, the blowing head is flat, and the opening length of the blowing head is greater than the width of the second heat dissipation module.

[0018] Preferably, the temperature sensing module includes temperature sensors arranged in the activity cavity and the air exchange cavity.

[0019] Preferably, the control module is configured to perform the following control method:

[0020] When the ventilation cavity temperature is greater than or equal to the first threshold value or the ventilation cavity temperature rising rate exceeds the limit value, the air volume distribution mechanism is controlled to be in the first working state, and the heat dissipation fan is controlled to run at maximum power;

[0021] When the ventilation cavity temperature is less than the first threshold value, and the ventilation cavity temperature is greater than the second threshold value or the activity cavity temperature is greater than the third threshold value, the heat dissipation fan is controlled to run at a first preset power, and the air volume distribution mechanism is continuously adjusted between the first working state and the second working state;

[0022] When the ventilation cavity temperature is less than the second threshold value, and the activity cavity temperature is less than the third threshold value, the air volume distribution mechanism is controlled to be in the second working state or the closed state, and the heat dissipation fan is controlled to run in a speed reduction mode or an intermittent mode.

[0023] Preferably, the continuous adjustment adopts a PID closed-loop control algorithm, taking the ventilation cavity temperature as the control object, taking the second threshold value as the set target, and taking the control signal of the air volume distributor as the output.

[0024] The present application has the advantages that:

[0025] The present application realizes differentiated and accurate heat dissipation for different working areas of the vacuum pump by setting the heat dissipation execution module, the temperature sensing module and the control module. The two heat dissipation modules in the heat dissipation execution module act on the ventilation cavity and the activity cavity respectively, cooperate with the heat dissipation fan and the air volume distribution mechanism, and can adjust the heat dissipation intensity and direction according to the actual demand. The temperature sensing module monitors the temperature of each area in real time to provide accurate data for the control module. The control module selects the appropriate heat dissipation mode according to the temperature data and the preset threshold value, so as to effectively reduce the energy consumption and noise while ensuring the normal operation of the equipment, and improve the overall performance and reliability of the vacuum pump. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the overall appearance structure schematic diagram of the present application;

[0027] Figure 2 is the sectional view of the pump body in the present application;

[0028] Figure 3 is the local structure schematic diagram of the pump body in the present application;

[0029] Figure 4 is the structure schematic diagram of the heat dissipation execution module in the present application;

[0030] Figure 5 is the structure schematic diagram of the heat dissipation execution module in the present application;

[0031] Figure 6is a structural schematic diagram between the air inlet cover and the blowing head in the application;

[0032] Figure 7 is a relationship block diagram between various modules in the application.

[0033] In the figure: 100, reciprocating pump body; 101, pump body; 102, crank connecting rod mechanism; 103, piston; 104, air inlet valve; 105, air outlet valve; 106, movable cavity; 107, gas exchange cavity;

[0034] 200, heat dissipation execution module; 201, heat dissipation fan; 202, heat dissipation fin one; 203, mounting cover; 204, heat dissipation fin two; 205, linear telescopic source; 206, air inlet cover; 207, blowing head; 208, air inlet pipe;

[0035] 300, temperature sensing module. DETAILED DESCRIPTION

[0036] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the content of this specification. Various processes or components can be omitted, substituted, or added according to need for each example. In addition, features described with respect to some examples can also be combined in other examples.

[0037] Please refer to Figures 1 to 3 A carbon fiber corrosion-resistant vacuum pump facilitating heat dissipation includes a reciprocating pump body 100, a heat dissipation execution module 200, a temperature sensing module 300, and a control module. The reciprocating pump body 100 includes a pump body 101, a crank connecting rod mechanism 102, a piston 103, an air inlet valve 104, and an air outlet valve 105. The pump body 101 is approximately L-shaped as a whole and is made of carbon fiber composite material, having high corrosion resistance. A movable cavity 106 is arranged on the left side inside the pump body 101, and the crank connecting rod mechanism 102 is arranged in the movable cavity 106. A gas exchange cavity 107 is arranged on the right side inside the pump body 101, and the piston 103, the air inlet valve 104, and the air outlet valve 105 are arranged in predetermined positions in the gas exchange cavity 107, respectively. One end of the piston 103 is connected to the crank connecting rod mechanism 102. When liquid medium is transported, the crank connecting rod mechanism 102 can drive the piston 103 to move horizontally in the gas exchange cavity 107 under the driving action of an external driving source, so that the air inlet valve 104 and the air outlet valve 105 are sequentially opened and closed to realize continuous transportation of the liquid medium in the gas exchange cavity 107. Since this technology is a conventional technical means in the field, the transportation principle will not be described in detail here.

[0038] Please refer to Figures 3 to 7The heat dissipation execution module 200 comprises a heat dissipation module one, a heat dissipation module two, a heat dissipation fan 201 and a wind volume distribution mechanism. The heat dissipation module one is arranged on the outer side of the pump body 101 corresponding to the air exchange cavity 107. The heat dissipation module one specifically comprises four vertically arranged heat dissipation fins one 202 corresponding to the four sides of the pump body 101 and a mounting cover 203 fixed to the top ends of the four heat dissipation fins. The four heat dissipation fins respectively act on the four sides of the air exchange cavity 107, so that the air exchange cavity 107 can be rapidly cooled. The heat dissipation module two is arranged on the outer side of the pump body 101 corresponding to the movable cavity 106. The heat dissipation module two specifically comprises a heat dissipation fin two 204 fixed to the top surface of the left side of the pump body 101, which is used to cool the movable cavity 106. The heat dissipation fan 201 is located at the upper end of the right side of the pump body 101 and is detachably connected with the mounting cover 203. The wind volume distribution mechanism comprises a linear extension source 205, a telescopic air inlet cover 206 and a blowing head 207. The linear extension source 205 is arranged on the pump body 101 and can be a miniature electric push rod. The air inlet cover 206 is arranged in the mounting cover 203 and is connected with the extension end of the linear extension source 205 on one side. The air inlet cover 206 is made of rubber and its extension posture is adapted to the gap between the mounting cover 203 and the pump body 101, so as to effectively intercept the air flow. The opening of the air inlet cover 206 faces the heat dissipation fan 201. When the air inlet cover 206 is fully expanded, it can intercept at least half of the air flow on the top of the corresponding side heat dissipation fin. The blowing head 207 is arranged on the left side of the body and its opening faces the heat dissipation fin on the left side of the pump body 101. The blowing head 207 is in communication with the air inlet cover 206 through an air inlet pipe 208. The blowing head 207 is flat and its opening length is greater than the width of the second heat dissipation module, so as to effectively cover the heat dissipation fin two 204.

[0039] The working process of the heat dissipation execution module 200 is as follows:

[0040] According to the control module instruction, the linear extension source 205 drives the air inlet cover 206 to expand or contract through the extension action. The top opening of the expanded air inlet cover 206 faces the heat dissipation fan 201 and can intercept part of the air flow. Then the air flow flows to the blowing head 207 through the air inlet pipe 208 and is finally blown out from the blowing head 207 to the heat dissipation fin two 204, so as to realize the rapid cooling of the movable cavity 106 around. In actual use, the expansion area of the air inlet cover 206 is controlled to adjust the intercepted air volume, so as to realize the heat dissipation regulation and control between the movable cavity 106 and the air exchange cavity 107. When the air inlet cover 206 is fully contracted, the air flow generated by the heat dissipation fan 201 can directly act on the heat dissipation fin one 202, so as to realize the maximum heat dissipation mode of the air exchange cavity 107. The differential heat dissipation strategy can improve the problems of resource waste and local overheating existing in the traditional uniform heat dissipation mode through the linkage of the wind volume distribution mechanism and the temperature sensing module 300, and has the energy saving effect.

[0041] The temperature sensing module 300 can include multiple temperature sensors respectively arranged in the active cavity 106 and the ventilation cavity 107, for monitoring the temperature values of the corresponding regions in real time and uploading to the control module.

[0042] The control module is signal connected with the temperature sensing module 300, the heat dissipation fan 201 and the air volume distribution mechanism, and is configured to control the rotating speed of the heat dissipation fan 201 and the working state of the air volume distribution mechanism according to the received temperature data, so as to realize differentiated and accurate heat dissipation for different working regions of the pump body 101.

[0043] The use process of the vacuum pump is as follows:

[0044] S100: initial operation

[0045] After the vacuum pump is started, the crank connecting rod mechanism 102 can drive the piston 103 to move horizontally in the ventilation cavity 107 under the driving action of the external driving source, so that the inlet valve 104 and the outlet valve 105 are sequentially opened and closed, so as to realize continuous conveying of the liquid medium in the ventilation cavity 107.

[0046] S200: real-time data acquisition

[0047] During the operation of the vacuum pump, the multiple temperature sensors in the temperature sensing module 300 continuously monitor the temperature in the active cavity 106 and the ventilation cavity 107 in real time, and transmit the obtained temperature values to the control module.

[0048] S300: data preprocessing

[0049] The control module reads the temperature data at a fixed frequency (such as once per second), and filters the original data (such as moving average filtering) to eliminate noise interference, so as to obtain smooth and reliable temperature values T v (ventilation cavity) and T h (active cavity 106).

[0050] S400: trend analysis

[0051] The control module calculates the change rates dT v / d t and dT h / d t of the temperature in a unit time, for predicting the future change trend of the temperature.

[0052] S500: mode judgment and execution

[0053] The control module compares the processed data with the preset temperature threshold, and selects the operation mode according to the highest priority principle.

[0054] S501: judging whether the mode one (full cooling mode) condition is met

[0055] Trigger condition: T v ≥ T vertical-high (85°C) or dT v / d t The value is extremely large (indicating that the temperature is rising sharply);

[0056] Action: Control linear extension source 205 to act immediately, make the air inlet cover 206 fully shrink, terminate all the flow to the active cavity 106; control the cooling fan 201 to run at 100% PWM duty cycle at full speed.

[0057] Target: Concentrate all cooling air volume on the air exchange cavity 107 that needs heat dissipation most, achieve rapid forced cooling, and prevent equipment overheating damage.

[0058] S502: If mode one is not met, determine whether mode two (balanced cooling mode) conditions are met

[0059] Trigger condition: T v <T vertical-high and (T v >T vertical-target (75°C) or T h >T horizontal-high (65°C));

[0060] Action: Control the cooling fan 201 to run at a higher basic speed (such as 70% PWM duty cycle); use PID closed-loop control algorithm to dynamically adjust the opening degree of the air inlet cover 206; take the air exchange cavity 107 temperature T v as the control object, and T vertical-target as the set target;

[0061] Control logic: T v rise, reduce the opening degree of the air inlet cover 206 (reduce the flow, preferentially cool the air exchange cavity 107); T v decrease and T h rise, increase the opening degree of the air inlet cover 206 (increase the flow, cool the active cavity 106).

[0062] S503: If none of the above modes are met, enter mode three (energy-saving and noise-reducing mode)

[0063] Trigger condition: T v <T vertical-target (75°C) and T h <T horizontal-high (65°C).

[0064] Performing action: control linear extension source 205, maintain air inlet cover 206 at a minimum opening (such as 20%) or completely closed; control cooling fan 201 to run at a low speed (such as 30%-40% PWM duty cycle) or switch to intermittent operation mode (such as running for 30 seconds and stopping for 2 minutes), to significantly reduce energy consumption and operating noise.

[0065] From the above, the vacuum pump of the present application has the technical effects:

[0066] By setting the heat dissipation execution module 200, the temperature sensing module 300 and the control module, the differential and accurate heat dissipation of different working areas of the vacuum pump is realized. Specifically, the two heat dissipation modules in the heat dissipation execution module 200 act on the air cavity 107 and the movable cavity 106 respectively, cooperate with the cooling fan 201 and the air volume distribution mechanism, and can adjust the heat dissipation intensity and direction according to the actual demand; the temperature sensing module 300 monitors the temperature of each area in real time, and provides accurate data for the control module; the control module selects the appropriate heat dissipation mode, including full cooling mode, balanced heat dissipation mode and energy saving and noise reduction mode, according to the temperature data and the preset threshold value, so as to effectively reduce the energy consumption and noise while ensuring the normal operation of the equipment, and improve the overall performance and reliability of the vacuum pump.

[0067] In addition, compared with directly configuring a cooling fan 201 in each working area, the use cost is lower, which is more in line with the actual use demand, and the structure is more compact, avoiding the problem of noise superposition and energy consumption increase caused by the simultaneous operation of multiple fans, reducing the maintenance cost.

[0068] The embodiments of the present application are described above, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not limiting, and those skilled in the art can make many forms under the inspiration of the present application, which all belong to the protection of the present application.

Claims

1. A carbon fiber corrosion resistant vacuum pump facilitating heat dissipation, characterized in that, The application relates to a reciprocating pump body, a heat dissipation execution module, a temperature sensing module and a control module. The reciprocating pump body comprises a pump body, a crank connecting rod mechanism, a piston, an air inlet valve and an air outlet valve, an air inlet cavity for accommodating the crank connecting rod mechanism is arranged in the pump body, and an air exchange cavity for accommodating the piston, the air inlet valve and the air outlet valve is arranged in the pump body. The heat dissipation execution module comprises a first heat dissipation module, a second heat dissipation module, a heat dissipation fan and a wind volume distribution mechanism. The first heat dissipation module is arranged on the outer side of the pump body and corresponds to the air exchange cavity. The second heat dissipation module is arranged on the outer side of the pump body and corresponds to the active cavity. The heat dissipation fan is connected with the first heat dissipation module. The wind volume distribution mechanism is arranged between the heat dissipation fan and the first heat dissipation module and has at least two working states. In the first working state, the air flow generated by the heat dissipation fan is all guided to the first heat dissipation module. In the second working state, part of the air flow is branched and guided to the second heat dissipation module.

2. The carbon fiber corrosion resistant vacuum pump of claim 1, wherein, The temperature sensing module is used for acquiring the temperature in the active cavity and the air exchange cavity in real time.

3. The carbon fiber corrosion resistant vacuum pump of claim 2, wherein, The control module is connected with the temperature sensing module, the heat dissipation fan and the wind volume distribution mechanism in signal mode and is configured to control the rotating speed of the heat dissipation fan and the working state of the wind volume distribution mechanism according to the received temperature data, so as to realize differential and accurate heat dissipation of different working areas of the pump body.

4. The carbon fiber corrosion resistant vacuum pump of claim 3, wherein, The first heat dissipation module comprises four vertically arranged heat dissipation fins one corresponding to the four sides of the air exchange cavity of the pump body and a mounting cover fixed to the top ends of the four heat dissipation fins.

5. The carbon fiber corrosion resistant vacuum pump of claim 1, wherein, The heat dissipation fan is detachably connected with the mounting cover.

6. The carbon fiber corrosion resistant vacuum pump of claim 1, wherein, The wind volume distribution mechanism is arranged in the mounting cover. The second heat dissipation module comprises heat dissipation fins two arranged on one side of the active cavity of the pump body. The heat dissipation fins two are horizontally arranged. The wind volume distribution mechanism comprises a linear telescopic source, a telescopic air inlet cover and a blowing head. The air inlet cover is connected with the telescopic end of the linear telescopic source and has an opening facing the heat dissipation fan. The blowing head is arranged on the left side of the pump body and is aligned with the second heat dissipation module and is communicated with the air inlet cover through an air inlet pipe. The linear telescopic source drives the air inlet cover to be telescoped, so as to change the area of the intercepted air flow and realize the distribution of the wind volume. The linear telescopic source is an electric push rod fixedly arranged on the pump body. The air inlet cover is made of rubber and its telescopic posture is adapted to the gap between the mounting cover and the pump body. The blowing head is flat and its opening length is greater than the width of the second heat dissipation module. The temperature sensing module comprises temperature sensors arranged in the active cavity and the air exchange cavity. The control module is configured to execute the following control method. When the temperature of the air exchange cavity is greater than or equal to a first threshold value or the temperature rising rate of the air exchange cavity exceeds a limit value, the wind volume distribution mechanism is controlled to be in the first working state and the heat dissipation fan is controlled to run at the maximum power. When the temperature of the air exchange cavity is less than the first threshold value and the temperature of the air exchange cavity is greater than a second threshold value or the temperature of the active cavity is greater than a third threshold value, the heat dissipation fan is controlled to run at a first preset power and the wind volume distribution mechanism is continuously adjusted between the first working state and the second working state. When the temperature of the air exchange cavity is less than the second threshold value and the temperature of the active cavity is less than the third threshold value, the wind volume distribution mechanism is controlled to be in the second working state or the closed state and the heat dissipation fan is controlled to run in the speed reduction mode or the intermittent mode.

7. The carbon fiber corrosion resistant vacuum pump of claim 6, wherein, The continuous adjustment adopts a PID closed-loop control algorithm, takes the temperature of the air exchange cavity as a control object, takes the second threshold value as a set target, and outputs a control signal for the air volume distributor.

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