CN112610461B - Electric diaphragm pump with self-protection function - Google Patents

Electric diaphragm pump with self-protection function Download PDF

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Publication number
CN112610461B
CN112610461B CN202011425869.2A CN202011425869A CN112610461B CN 112610461 B CN112610461 B CN 112610461B CN 202011425869 A CN202011425869 A CN 202011425869A CN 112610461 B CN112610461 B CN 112610461B
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CN
China
Prior art keywords
shaft
sealing cavity
diaphragm pump
driven shaft
grinding disc
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Application number
CN202011425869.2A
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Chinese (zh)
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CN112610461A (en
Inventor
王圣双
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Jiashan Frontier Machinery Co ltd
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Jiashan Frontier Machinery Co ltd
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Priority to CN202011425869.2A priority Critical patent/CN112610461B/en
Publication of CN112610461A publication Critical patent/CN112610461A/en
Application granted granted Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
    • F16D43/21—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members
    • F16D43/213—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces
    • F16D43/215—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces with flat friction surfaces, e.g. discs

Abstract

An electric diaphragm pump with self-protection function comprises a motor, a torque adjusting mechanism and a diaphragm pump. The torque adjusting mechanism comprises a shell, an end cover, an air pressure linkage mechanism, an air pressure adjusting assembly and a pressure regulating valve. The pneumatic linkage mechanism comprises a driving assembly, a driven shaft, a first sealing cavity and a second sealing cavity. The driving assembly comprises a guide shaft, a flat key and a millstone shaft. The millstone shaft is arranged on the guide shaft in a sliding way through the flat key and is arranged at intervals with the driven shaft. The millstone shaft passes through the first sealed cavity and extends into the second sealed cavity. When the torque of the load of the driven shaft exceeds the rated torque, air is input into the second sealing cavity through the air pressure adjusting mechanism, so that the grinding disc shaft is pushed to move towards the direction of the guide shaft, the grinding disc shaft is separated from the driven shaft, the motor idles, and the purpose of protecting the motor and the diaphragm pump is achieved.

Description

Electric diaphragm pump with self-protection function
Technical Field
The invention relates to the technical field of diaphragm pumps, in particular to an electric diaphragm pump with a self-protection function.
Background
The electric diaphragm pump is a novel pump, and can be applied to industries such as petrochemical industry, ceramic industry, metallurgy industry and the like as breakthrough progress is made on diaphragm materials. It features no need of irrigation and water diversion, and strong self-priming power. The working principle is that four one-way ball valves are installed in the left and right pump cavities of the diaphragm pump, the motor drives the diaphragms on the pistons at the left and right ends of the diaphragm pump to reciprocate, the four one-way ball valves are forced to be alternately opened and closed, and the volume in the working cavity is changed, so that liquid is continuously sucked and discharged.
In the prior art, the driven shaft of the motor is directly connected with the diaphragm pump, so that the diaphragm pump is driven to work. However, when the pressure inside the diaphragm pump is too high, the bearings of the motor are subjected to a large load, and when the load is too high, the motor is damaged quickly. The method adopted at present is to damage the bearing of the motor and replace the bearing in time, thereby protecting the motor and the diaphragm pump. However, the cost is high, and the disassembly and the replacement are required to be stopped, so that the working efficiency is affected.
Disclosure of Invention
In view of the above, the present invention provides an electric diaphragm pump with self-protection function to solve the above technical problems.
An electric diaphragm pump with self-protection function comprises a torque adjusting mechanism, a motor for driving the torque adjusting mechanism, and a diaphragm pump arranged on the torque adjusting mechanism. The torque adjusting mechanism comprises a shell, an air pressure linkage mechanism arranged in the shell and an air pressure adjusting assembly arranged on the shell. The pneumatic linkage mechanism comprises a driving assembly arranged on the motor, a driven shaft arranged at intervals with the driving assembly, a first sealing cavity arranged on the driving assembly, and a second sealing cavity arranged on the driven shaft. The driving assembly comprises a guide shaft arranged in the shell, two flat keys respectively arranged on two sides of the guide shaft, and a millstone shaft arranged on the two flat keys in a sliding manner. The guide shafts drive the grinding disc shafts to rotate, two flat keys are respectively arranged on two sides of one end of each guide shaft and located between the guide shafts and the grinding disc shafts, one side face of each flat key is clung to the outer side face of each guide shaft, and the other side face of the opposite side is clung to the inner side face of each grinding disc shaft. The grinding disc shaft is characterized in that one end of the grinding disc shaft is arranged on the two flat keys in a sliding mode and located in the first sealing cavity, the end face of the other end of the grinding disc shaft is a plane end and penetrates through the first sealing cavity to extend into the second sealing cavity, the end face of one end of the driven shaft is a plane end and is arranged at intervals with the plane end of the grinding disc shaft, and the other end of the driven shaft extends out of the shell. The air pressure adjusting assembly comprises a first air pipe, a second air pipe, an electromagnetic valve and a temperature sensor, wherein the first air pipe is arranged on the first sealing cavity and communicated with the first sealing cavity, the second air pipe is arranged on the second sealing cavity and communicated with the second sealing cavity, the electromagnetic valve is arranged on the first air pipe and the second air pipe, and the temperature sensor is arranged outside the shell. The temperature sensor is used for detecting the temperature of the joint of the driven shaft and the millstone shaft. And the gas enters the first sealing cavity or the second sealing cavity through the air pressure adjusting component and drives the millstone shaft to make reciprocating translation so as to enable the millstone shaft to be in contact with or disconnected from the driven shaft.
Further, the torque adjusting mechanism further comprises an end cover arranged on one end of the shell, and the driven shaft penetrates through the end cover.
Further, the torque adjusting mechanism further comprises a pressure regulating valve arranged on the air pressure adjusting assembly, and the pressure regulating valve is used for regulating the air pressure intensity passing through the air pressure adjusting assembly.
Further, the first sealing cavity comprises a first bearing sleeved on the outer side of the guide shaft, a first sealing ring support sleeved on the outer side of the guide shaft, a first lip-shaped sealing ring arranged on the first sealing ring support and located between the first sealing ring support and the first bearing, a second sealing ring support sleeved on the outer side of the grinding disc shaft, and a second lip-shaped sealing ring arranged on the second sealing ring support.
Further, the second sealing assembly comprises a third sealing ring support sleeved on the outer side of the driven shaft, a thrust ball bearing sleeved on the outer side of the driven shaft, a second bearing sleeved on the outer side of the driven shaft and a third lip-shaped sealing ring arranged on the third sealing ring support.
Further, the setting direction of the flat key is parallel with the axial direction of the guide shaft.
Compared with the prior art, the electric diaphragm pump with the self-protection function provided by the invention has the advantages that the torque adjusting mechanism is arranged between the motor and the diaphragm pump, and particularly, the torque adjusting mechanism comprises a shell arranged on the motor, an end cover arranged on one end of the shell, an air pressure linkage mechanism arranged on the motor and positioned in the shell, an air pressure adjusting component arranged on the shell, and a pressure regulating valve arranged on the air pressure adjusting component. The pneumatic linkage mechanism comprises a driving assembly arranged on the motor, a driven shaft arranged at intervals with the driving assembly, a first sealing cavity arranged on the driving assembly, and a second sealing cavity arranged on the driven shaft. The driving assembly comprises a guide shaft, two flat keys and a millstone shaft. The millstone shaft is arranged on the two flat keys in a sliding manner and penetrates through the first sealing cavity. When the torque of the load of the driven shaft exceeds the rated torque, high-pressure gas is input into the second sealing cavity through the air pressure adjusting assembly, so that the grinding disc shaft is pushed to move towards the direction of the guide shaft, the grinding disc shaft is separated from the driven shaft, the motor idles, and the purpose of protecting the motor and the diaphragm pump when the torque is overlarge is achieved. The output torque of the grinding disc shaft is related to the air pressure filled in the first air pipe, and the larger the air pressure is, the larger the output torque of the grinding disc shaft is, and vice versa. The pressure regulating valve arranged on the first air pipe is used for regulating the air pressure filled in the first air pipe, so that the torque can be regulated.
Drawings
Fig. 1 is a schematic structural diagram of an electric diaphragm pump with self-protection function.
Fig. 2 is a schematic cross-sectional structure of a torque adjusting mechanism of the electric diaphragm pump with self-protection function of fig. 1.
Description of the embodiments
Specific embodiments of the present invention are described in further detail below. It should be understood that the description herein of the embodiments of the invention is not intended to limit the scope of the invention.
Fig. 1 to 2 are schematic structural views of an electric diaphragm pump with self-protection function according to the present invention. The electric diaphragm pump with the self-protection function comprises a motor 10, a torque adjusting mechanism 20 arranged on the motor 10, and a diaphragm pump 30 arranged on the torque adjusting mechanism 20. It is conceivable that the electric diaphragm pump with self-protecting function further includes other functional modules, such as an assembly module, a mounting module, a control module, and an electrical connection module, etc., which are known to those skilled in the art, and will not be described herein.
The output end of the motor 10 is connected with the torque adjusting mechanism 20, and the motor 10 is used for driving the torque adjusting mechanism 20. Which is itself prior art and will not be described in detail herein.
The torque adjusting mechanism 20 includes a housing 21 provided on the motor 10, an end cap 22 provided on one end of the housing 21, an air pressure linkage 23 provided on the motor 10 and located in the housing 21, an air pressure adjusting assembly 24 provided on the housing 21, and a pressure regulating valve 25 provided on the air pressure adjusting assembly 24.
The housing 21 has a hollow cylindrical structure for connecting the motor 10 and the diaphragm pump 30, and is internally provided for accommodating the pneumatic linkage 23. One end of the housing 21 is disposed in the output direction of the motor 10, and the output end of the motor extends into the housing 21, and the other end of the housing 21 is provided with the end cover 22.
The end cap 22 is disposed at one end of the housing 21 and is connected to the diaphragm pump 30, thereby connecting the torque adjusting mechanism 20 to the diaphragm pump 30.
The pneumatic linkage 23 includes a driving assembly 231 provided on the motor 10, a driven shaft 232 provided at a distance from the driving assembly 231, a first sealing chamber 233 provided on the driving assembly 231, and a second sealing chamber 234 provided on the driven shaft 232.
The driving assembly 231 includes a guide shaft 2311 provided at an output end of the motor 10, two flat keys 2312 provided at both sides of the guide shaft 2311, respectively, and a grinding disc shaft 2313 slidably provided at the two flat keys 2312.
One end of the guide shaft 2311 is disposed at the output end of the motor 10, so that the guide shaft 2311 is rotated by the output end of the motor 10. Two flat keys 2312 are respectively provided at both sides of the other end of the guide shaft 2311. The flat key 2312 is a guide flat key and is located between the guide shaft 2311 and the grinding disc shaft 2313. One side surface of each flat key 2312 is closely attached to the outer side surface of the guide shaft 2311, and the other side surface of the opposite side is closely attached to the inner side surface of the grinding disc shaft 2313. The two flat keys 2312 are disposed in a direction parallel to the axial direction of the guide shaft 2311. The flat key 2312 is used to movably couple the grinding disc shaft 2313 and transmit torque to the grinding disc shaft 2313 through the flat key 2312, thereby rotating the grinding disc shaft 2313 with the guide shaft 2311. The grinding disc shaft 2313 is slidably disposed on the two flat keys 2312 and penetrates through the first sealing cavity 233, one end of the grinding disc shaft 2313 is slidably disposed on the two flat keys 2312 and located in the first sealing cavity 233, and the end face of the other end of the grinding disc shaft 2313 is a plane end and located in the second sealing cavity 234. The principle of the repeated translation of the grinding disc shaft 2313 along the axial direction of the guide shaft 2311 by the two flat keys 2312 under the action of the air pressure adjusting assembly 24 will be described below in conjunction with the air pressure adjusting assembly 24.
One end of the driven shaft 232 passes through the end cover 22 and is connected with the diaphragm pump 30, the end face of the other end is a plane end and is arranged at intervals with the plane end of the grinding disc shaft 2313, and the driven shaft 232 is positioned in the shell 21. When the grinding disc shaft 2313 moves axially towards the direction of the driven shaft 232 and abuts against the cover driven shaft 232, the plane ends of the grinding disc shaft 2313 and the guide shaft 2311 are clung to each other, so that static friction force is generated between the grinding disc shaft 2313 and the driven shaft 232 when the grinding disc shaft 2313 rotates, and the driven shaft 232 is driven to rotate.
The first seal cavity 233 includes a first bearing 2331 sleeved on the outer side of the guide shaft 2311, a first seal ring bracket 2332 sleeved on the outer side of the guide shaft 2311, a first lip seal ring 2333 arranged on the first seal ring bracket 242, a second seal ring bracket 2334 sleeved on the outer side of the grinding disc shaft 2313, and a second lip seal ring 2335 arranged on the second seal ring bracket 2334.
The first bearing 2331 is sleeved on the outer side of the guide shaft 2311 and located between the guide shaft 2311 and the housing 21, and the first bearing 2331 is used for supporting the guide shaft 2311 to rotate and reducing friction, thereby facilitating rotation of the guide shaft 2311. The first seal ring bracket 2332 is sleeved outside the guide shaft 2311, and the first seal ring bracket 2332 is used for accommodating and fixing the first lip seal ring 2333. The first lip seal 2333 is disposed within the first seal bracket 2332 and between the first seal bracket 2332 and the first bearing 2331. The second seal ring bracket 2334 is sleeved outside the grinding disc shaft 2313 and is located between the grinding disc shaft 2313 and the housing 21. The second seal ring bracket 2334 is configured to receive and secure the second lip seal ring 2335. The second lip seal 2335 is disposed within the second seal ring bracket 2334 and between the second seal ring bracket 2334 and the grinding disc shaft 2313. A sealed cavity, namely the first sealing cavity 233, is formed between the first lip seal 2334 and the second lip seal 2335 through the sealing action of the first lip seal 2334 and the second lip seal 2335.
The second seal chamber 234 includes a third seal ring support 2341 sleeved outside the driven shaft 232, a thrust ball bearing 2342 sleeved outside the driven shaft 232, a second bearing 2343 sleeved outside the driven shaft 232, and a third lip seal ring 2344 disposed on the third seal ring support 2341.
The third seal ring support 2341 is sleeved outside the driven shaft 232 and located between the driven shaft 232 and the housing 21, and the third seal ring support 2341 is used for setting the thrust ball bearing 2342, the second bearing 2343 and the third lip seal ring 2344. The thrust ball bearing 2342 is sleeved outside the driven shaft 232 and is located between the driven shaft 232 and the third seal ring bracket 2341. The thrust ball bearing 2342 is used to bear the axial load after the flat ends of the grinding disc shaft 2313 and the guide shaft 2311 are tightly attached to each other, so that the driven shaft 232 is more stable. The second bearing 2343 is sleeved outside the driven shaft 232 and is located between the driven shaft 232 and the third seal ring bracket 2341. The second bearing 2343 is used to support the driven shaft 232 for rotation and reduce friction, thereby facilitating rotation of the driven shaft 232. The third lip seal 2344 is disposed on the third seal support 2341 and is located between the third seal support 2341 and the driven shaft 232. A sealed cavity, namely a second sealed cavity 234, is formed between the second lip seal 2335 and the third lip seal 2344 through the sealing action of the second lip seal 2335 and the third lip seal 2344.
The air pressure regulating assembly 24 includes a first air pipe 241 provided on the first sealing chamber 233 and communicating with the first sealing chamber 233, a second air pipe 242 provided on the second sealing chamber 234 and communicating with the second sealing chamber 234, solenoid valves 243 provided on the first and second air pipes 241, 242, and a temperature sensor 243 provided outside the housing 21.
The first gas pipe 241 has one end connected to the first sealing chamber 233 and the other end connected to the solenoid valve 243, so as to connect the solenoid valve 243 to the first sealing chamber 233, and allow gas to enter the first sealing chamber 233 through the first gas pipe 241. The second gas pipe 242 has one end connected to the second sealing chamber 234 and the other end connected to the solenoid valve 243, thereby connecting the solenoid valve 243 to the second sealing chamber 234, so that gas can enter the second sealing chamber 234 through the second gas pipe 242. The solenoid valve 243 is connected to the first and second air pipes 43 and 44 and an air cylinder (not shown), respectively. The solenoid valve 243 is used to control the flow direction of the gas, but is conventional per se, and will not be described herein. The temperature sensor 243 is disposed on the outer side wall of the housing 21 and connected to a control module (not shown), and the temperature sensor 243 is located between the grinding disc shaft 2313 and the driven shaft 232, so that the temperature sensor 243 can detect the temperature of the grinding disc shaft 2313 and the driven shaft 232 when the grinding disc shaft 2313 and the driven shaft 232 are in close fit, and transmit the temperature to the control module.
When in operation, the motor 10 is started to drive the guide shaft 2311 and the grinding disc shaft 2313 to rotate, the air cylinder introduces high-pressure air into the electromagnetic valve 243, and the electromagnetic valve 243 controls the high-pressure air to enter the first sealing cavity 233 from the first air pipe 241. Because the grinding disc shaft 2313 is slidably disposed on the guide shaft 2311 through two flat keys 2312, high-pressure gas can push the grinding disc shaft 2313 to move towards the direction of the driven shaft 232, so that the plane end of the grinding disc shaft 2313 and the plane end of the driven shaft 232 are mutually clung, static friction force is generated between the grinding disc shaft 2313 and the driven shaft 232, and the driven shaft 232 is driven to rotate, so that the purpose of driving the diaphragm pump 30 is achieved. When the torque of the driven shaft 232 exceeds the rated torque, dry friction is generated between the grinding disc shaft 2313 and the driven shaft 232, so that the contact surface of the grinding disc shaft 2313 and the driven shaft 232 generates heat quickly, and the heat is transferred to the housing 21. The temperature sensor 243 detects high temperature and transmits a signal to the control module, and the control module controls the electromagnetic valve 243 to change the output direction of the high-pressure gas, so that the high-pressure gas enters the second sealing chamber 234 through the second gas pipe 242, and at this time, the high-pressure gas pushes the grinding disc shaft 2313 to move towards the direction of the guide shaft 2311, so that the grinding disc shaft 2313 is separated from the driven shaft 232, and the motor 10 idles, thereby achieving the purpose of protecting the motor and the diaphragm pump when the torque is too large. When the temperature sensor 243 detects that the temperature falls within a predetermined range, a signal is transmitted to a control module, and the control module controls the electromagnetic valve 243 to change the output direction of the high-pressure gas, and the electromagnetic valve 243 sequentially circulates, thereby enabling the electric diaphragm pump to have a self-protection function.
The pressure regulating valve 25 is disposed on the first gas pipe 241, and the pressure regulating valve 25 is used for regulating the pressure of the gas passing through the first gas pipe 241. The output torque (M) of the grinding disc shaft 2313 is equal to the torque (L) multiplied by the force (F) of the grinding disc shaft 2313, and the torque (L) is the rotational torque of the motor 10, which is a constant value, so that the output torque (M) of the grinding disc shaft 2313 is only related to the magnitude of the force (F) of the grinding disc shaft 2313. The force (F) of the grinding disc shaft 2313 is equal to the cross-sectional area (S) of the grinding disc shaft 2313 multiplied by the air pressure (P) charged by the first air pipe 241, and the cross-sectional area (S) of the grinding disc shaft 2313 is also constant, so that the force (F) of the grinding disc shaft 2313 is only related to the air pressure (P) charged by the first air pipe 241. From this, a relationship between the magnitude of the air pressure charged by the first air pipe 241 and the output torque of the grinding disc shaft 2313 can be derived, and the larger the magnitude of the air pressure charged is, the larger the output torque of the grinding disc shaft 2313 is, and vice versa. Thereby, the pressure of the air filled in the first air pipe 241 is adjusted through the pressure regulating valve 25, so as to realize the adjustment of torque.
The diaphragm pump 30 is disposed on the torque adjusting mechanism 30, and the driven shaft 232 extends into the diaphragm pump 30, so that the driven shaft 232 rotates to drive the diaphragms at the left and right ends in the diaphragm pump 30 to reciprocate, so that the volume in the cavity of the diaphragm pump 30 is changed, and liquid is continuously sucked and discharged. The working principle and the self are the prior art, and are not described in detail herein.
Compared with the prior art, the electric diaphragm pump with the self-protection function provided by the invention has the advantages that the torque adjusting mechanism 20 is arranged between the motor 10 and the diaphragm pump 30, and in particular, the torque adjusting mechanism 20 comprises a shell 21 arranged on the motor 10, an end cover 22 arranged on one end of the shell 21, an air pressure linkage mechanism 23 arranged on the motor 10 and positioned in the shell 21, an air pressure adjusting assembly 24 arranged on the shell 21 and a pressure regulating valve 25 arranged on the air pressure adjusting assembly 24. The pneumatic linkage 23 includes a driving assembly 231 provided on the motor 10, a driven shaft 232 provided at a distance from the driving assembly 231, a first sealing chamber 233 provided on the driving assembly 231, and a second sealing chamber 234 provided on the driven shaft 232. The drive assembly 231 includes a guide shaft 2311, two flat keys 2312, and a grinding disc shaft 2313. The grinding disc shaft 2313 is slidably disposed on two of the flat keys 2312 and passes through the first sealing cavity 233. When the torque of the driven shaft 232 exceeds the rated torque, high-pressure gas is input into the second sealing cavity 234 through the air pressure adjusting assembly 24, so that the grinding disc shaft 2313 is pushed to move towards the direction of the guide shaft 2311, the grinding disc shaft 2313 is separated from the driven shaft 232, the motor 10 idles, and the purpose of protecting the motor 10 and the diaphragm pump 30 when the torque is excessive is achieved. While the magnitude of the output torque of the grinding disc shaft 2313 is related to the magnitude of the air pressure charged in the first air pipe 241, the larger the magnitude of the air pressure charged, the larger the output torque of the grinding disc shaft 2313, and vice versa. The pressure regulating valve 25 arranged on the first air pipe 241 is used for regulating the air pressure filled in the first air pipe 241, so that the torque can be regulated.
The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions or improvements within the spirit of the present invention are intended to be covered by the claims of the present invention.

Claims (6)

1. An electric diaphragm pump with self-protection function, which is characterized in that: the electric diaphragm pump with self-protection function comprises a torque adjusting mechanism, a motor for driving the torque adjusting mechanism, and a diaphragm pump arranged on the torque adjusting mechanism, wherein the torque adjusting mechanism comprises a shell, an air pressure linkage mechanism arranged in the shell, and an air pressure adjusting component arranged on the shell, the air pressure linkage mechanism comprises a driving component arranged on the motor, a driven shaft arranged at intervals with the driving component, a first sealing cavity arranged on the driving component, a second sealing cavity arranged on the driven shaft, the driving component comprises a guide shaft arranged in the shell, two flat keys respectively arranged on two sides of the guide shaft, and a grinding disc shaft arranged on the two flat keys in a sliding manner, the guide shaft drives the grinding disc shaft to rotate, the two flat keys are respectively arranged on two sides of one end of the guide shaft and are positioned between the guide shaft and the grinding disc shaft, one side surface of each guide shaft is closely attached to one end face of the first sealing cavity, the other end face of the driven shaft is closely attached to the first end face of the outer side of the shell, the sealing cavity is arranged on the other end face of the outer side of the sealing cavity, the sealing cavity is closely attached to the other end face of the outer side of the sealing cavity, the sealing cavity is arranged on the sealing cavity, the end face of the sealing cavity is closely attached to the other end face of the outer end of the outer side of the sealing cavity, and the sealing cavity is arranged on the sealing cavity, the device comprises a first sealing cavity, a second sealing cavity, a first air pipe, a second air pipe, an electromagnetic valve, a temperature sensor and a temperature sensor, wherein the first air pipe is arranged on the first sealing cavity and communicated with the second sealing cavity, the electromagnetic valve is arranged on the first air pipe and the second air pipe, the temperature sensor is arranged on the outer side of the shell and is used for detecting the temperature of the joint of a driven shaft and a millstone shaft, and air enters the first sealing cavity or the second sealing cavity through an air pressure adjusting component and drives the millstone shaft to make reciprocating translation so as to enable the millstone shaft to be in contact with or disconnected from the driven shaft.
2. The electric diaphragm pump with self-protection function as claimed in claim 1, wherein: the torque adjusting mechanism further comprises an end cover arranged on one end of the shell, and the driven shaft penetrates through the end cover.
3. The electric diaphragm pump with self-protection function as claimed in claim 1, wherein: the torque adjusting mechanism further comprises a pressure regulating valve arranged on the air pressure adjusting assembly, and the pressure regulating valve is used for regulating the air pressure intensity passing through the air pressure adjusting assembly.
4. The electric diaphragm pump with self-protection function as claimed in claim 1, wherein: the first sealing cavity comprises a first bearing sleeved on the outer side of the guide shaft, a first sealing ring support sleeved on the outer side of the guide shaft, a first lip-shaped sealing ring arranged on the first sealing ring support and located between the first sealing ring support and the first bearing, a second sealing ring support sleeved on the outer side of the grinding disc shaft, and a second lip-shaped sealing ring arranged on the second sealing ring support.
5. The electric diaphragm pump with self-protection function as claimed in claim 1, wherein: the second sealing cavity comprises a third sealing ring support sleeved on the outer side of the driven shaft, a thrust ball bearing sleeved on the outer side of the driven shaft, a second bearing sleeved on the outer side of the driven shaft and a third lip-shaped sealing ring arranged on the third sealing ring support.
6. The electric diaphragm pump with self-protection function as claimed in claim 1, wherein: the setting direction of the flat key is parallel to the axial direction of the guide shaft.
CN202011425869.2A 2020-12-09 2020-12-09 Electric diaphragm pump with self-protection function Active CN112610461B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011425869.2A CN112610461B (en) 2020-12-09 2020-12-09 Electric diaphragm pump with self-protection function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011425869.2A CN112610461B (en) 2020-12-09 2020-12-09 Electric diaphragm pump with self-protection function

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Publication Number Publication Date
CN112610461A CN112610461A (en) 2021-04-06
CN112610461B true CN112610461B (en) 2023-08-25

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CN104514702A (en) * 2013-10-08 2015-04-15 英古所连公司 Hydraulically actuated diaphragm pumps
CN106194745A (en) * 2016-08-31 2016-12-07 上海肇民动力科技有限公司 Cylinder-type vacuum pump
CN106499749A (en) * 2016-11-25 2017-03-15 中国船舶重工集团公司第七0研究所 A kind of adjustable antioverloading shaft transmission of moment of torsion
CN206738439U (en) * 2017-03-22 2017-12-12 苏州涂印仕机电工业有限公司 Gas-pushing clutch
CN209959743U (en) * 2019-05-20 2020-01-17 斯捷尔传动机械(杭州)有限公司 Agricultural machine transmission shaft with torque overload protection structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022452A (en) * 2009-08-31 2011-04-20 世韩电动株式会社 Torque control transmission device clutch and tool system with same
CN104514702A (en) * 2013-10-08 2015-04-15 英古所连公司 Hydraulically actuated diaphragm pumps
CN106194745A (en) * 2016-08-31 2016-12-07 上海肇民动力科技有限公司 Cylinder-type vacuum pump
CN106499749A (en) * 2016-11-25 2017-03-15 中国船舶重工集团公司第七0研究所 A kind of adjustable antioverloading shaft transmission of moment of torsion
CN206738439U (en) * 2017-03-22 2017-12-12 苏州涂印仕机电工业有限公司 Gas-pushing clutch
CN209959743U (en) * 2019-05-20 2020-01-17 斯捷尔传动机械(杭州)有限公司 Agricultural machine transmission shaft with torque overload protection structure

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