Gear pump and fault early warning and monitoring method thereof

Abstract

The invention relates to the technical field of gear pumps, and discloses a gear pump and a fault early warning and monitoring method thereof. When a running problem is caused by shaft deviation of a first pump gear or a second pump gear, the side wheels are synchronously driven to deviate by shaft deviation of the first pump gear or the second pump gear, and the side wheels are in contact after deviation, so that friction is generated between the side wheels, and friction sound is generated by friction for warning and monitoring. Or the side wheel is in contact with the ratchet wheel after deviating, the side wheel rotates to rub with the ratchet wheel, and sound generated in the same way is used for warning and monitoring, so that when the gear pump runs, if the running structure in the gear pump goes wrong, the running state of the gear pump is monitored through contact between the side wheel and the ratchet wheel, and sound warning is carried out on the gear pump; operation of the gear pump is effectively monitored, workers are reminded to handle problems generated by the gear pump in time, and the operation stability of the gear pump is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gear pumps, and particularly to a gear pump and a fault early warning and monitoring method thereof. Background Art

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquids or increase their pressure. It consists of two gears, a pump body, and front and rear covers to form two closed spaces. When the gears rotate, the volume of the space on the side where the gears disengage increases from small to large, creating a vacuum to suck in the liquid, and the volume of the space on the side where the gears mesh decreases from large to small, squeezing the liquid into the pipeline.

[0003] In existing gear pumps, such as Chinese Patent Application CN119508217A, through the setting of a jet channel, during the process of the gear pump driving the fluid to transport and flow. When the teeth in the pump body rotate to a position close to the high-pressure side, the fluid on the high-pressure side of the teeth enters the jet channel through the inlet port and is ejected from the jet port near the tooth tip of the teeth to form a self-emitting jet. This self-emitting jet can be ejected towards the inner wall of the pump body or towards the meniscus, so that the self-emitting jet can form a convection with the leakage jet at the tooth tip gap, so that the two are mixed and form a vortex, in order to cooperate with the mainstream to further increase the impact loss of the leakage jet and reduce the flow velocity of the leakage jet. Based on this, the self-emitting jet formed by the jet channel can increase the flow resistance at the tooth tip gap, thereby reducing the flow velocity and leakage volume of the leakage jet, which is beneficial to improving performance parameters such as the head, flow rate, and flow velocity of the gear pump and the operating efficiency.

[0004] However, there are still the following problems: Because the gear pump needs to be sealed during operation, many operating states of the gear pump cannot be monitored, and it is impossible to effectively monitor whether the gear pump is working stably, resulting in the inability to solve the problems of the gear pump in a timely and effective manner if a failure occurs. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a gear pump and a fault early warning and monitoring method thereof, which have the advantages that when the gear pump is running, if there are problems with the internal operating structure of the gear pump, the contact between the side wheel and the ratchet is used to monitor the operating state of the gear pump and give an audible warning, effectively monitoring the operation of the gear pump, reminding the worker to timely handle the problems generated by the gear pump, and improving the stability of the gear pump operation, etc., and solving the problems that because the gear pump needs to be sealed during operation, many operating states of the gear pump cannot be monitored, and it is impossible to effectively monitor whether the gear pump is working stably, resulting in the inability to solve the problems of the gear pump in a timely and effective manner if a failure occurs.

[0006] To achieve the above object, the present invention provides the following technical solution: A gear pump includes a base, a pump mechanism disposed on the base, and a monitoring mechanism disposed on the pump mechanism. The pump mechanism includes a pump head, a first pump gear, and a second pump gear. The pump head is disposed on the base, the first pump gear is disposed inside the pump head, the second pump gear is disposed inside the pump head, the first pump gear meshes with the second pump gear, the first pump gear is directly above the second pump gear, and the overall dimensions of the first pump gear and the second pump gear are adapted to the internal dimensions of the pump head. The monitoring mechanism includes side wheels and ratchets. A plurality of the side wheels are disposed on the pump head. The side wheels are respectively in power connection with the first pump gear and the second pump gear. The axes of the side wheels are respectively on the same straight line as the axes of the first pump gear and the second pump gear. There is a gap between the side wheels. A plurality of the ratchets are disposed on the pump head. The ratchets are respectively above and below the overall side wheels. There is a gap between the ratchets and the side wheels. When the first pump gear and the second pump gear are offset, the side wheels touch each other or the side wheels touch the ratchets.

[0007] Preferably, the pump mechanism further includes a motor. The motor is fixedly installed on the base. The motor is located on one side of the base. The axis of the motor faces the other side of the base. The pump head is fixedly installed on the base. The pump head is located on the other side of the base. The pump head and the axis of the motor are at the same height. The inlet end of the pump head is on one side of the base. The discharge end of the pump head is on the other side of the base. A coupling is disposed between the motor and the pump head. One end of the coupling is fixedly connected to the axis of the motor. The other end of the coupling extends into the pump head. The coupling is sealed with the pump head.

[0008] Preferably, the first pump gear is rotatably fitted inside the pump head, the second pump gear is rotatably fitted inside the pump head, the first pump gear is directly above the second pump gear, the size of the first pump gear is the same as the size of the second pump gear, the axis of the first pump gear is fixedly connected to the coupling, and the position between the first pump gear and the second pump gear is at the same height as the inlet end of the pump head and at the same height as the discharge end of the pump head.

[0009] Preferably, a plurality of bearing seats are fixedly installed inside the pump head. The bearing seats and the shafts of the first pump gear and the second pump gear are at the same height. The shaft of the first pump gear is rotationally matched with the bearing seat, and the shaft of the second pump gear is rotationally matched with the bearing seat. The shaft of the first pump gear penetrates through the bearing seat and the pump head. The position where the shaft of the first pump gear on the pump head penetrates through the pump head is sealed with the bearing seat, and the position where the shaft of the second pump gear on the pump head penetrates through the pump head is sealed with the bearing seat.

[0010] Preferably, the monitoring mechanism further includes a first auxiliary gear. The first auxiliary gear is arranged on the pump head. The shaft of the first auxiliary gear is fixedly connected to the shaft of the first pump gear. A second auxiliary gear is arranged on the pump head. The shaft of the second auxiliary gear is fixedly connected to the shaft of the second pump gear. The size of the first auxiliary gear is the same as that of the second auxiliary gear, and the first auxiliary gear meshes with the second auxiliary gear.

[0011] Preferably, side wheels are fixedly installed on both the first auxiliary gear and the second auxiliary gear. A plurality of friction bumps are fixedly installed on the side surfaces of the side wheels. The friction bumps are evenly distributed on each side wheel. There is a gap between the bottom end of the movement track of the friction bumps on the upper side wheel and the top end of the movement track of the friction bumps on the lower side wheel. When the movement tracks of the friction bumps on the upper and lower sides overlap, the friction bumps rub against each other to generate a sound.

[0012] Preferably, a toothed belt is tensioned on the overall side wheels. A plurality of ratchets are rotationally matched on the pump head. The ratchets are symmetrically distributed beside the top end and the bottom end of the toothed belt. There is a gap between the ratchets and the toothed belt. A plurality of toggle plates are fixedly installed on the shafts of the ratchets. The toggle plates are evenly distributed in a circular shape on the shafts of each ratchet. A plurality of elastic pieces are fixedly installed on the pump head. Each elastic piece is adjacent to each toggle plate. The elastic piece is located on the rotation track of the toggle plate. A partition cover is fixedly installed on the pump head. The partition cover is of a hollow structure. The first auxiliary gear, the second auxiliary gear, the side wheels, the friction bumps, the toothed belt, the ratchets, the toggle plates, and the elastic pieces are all located inside the partition cover. An observation window is arranged on the partition cover. The observation window penetrates through the wall surface of the partition cover. The observation window is of a glass structure, and the observation window is sealed with the partition cover.

[0013] Preferably, a discharge pipe is fixedly installed on the discharge end of the pump head. The water inlet end of the discharge pipe is communicated with the pump head. One side of the discharge pipe is connected to the pump head, and the other side of the discharge pipe is the water discharge end. The water inlet end of the discharge pipe is located above the water discharge end of the discharge pipe. An impeller is rotatably fitted in the discharge pipe, and the impeller is adapted to the interior of the discharge pipe.

[0014] Preferably, a traction wheel is rotatably fitted on the discharge pipe. The traction wheel is power-connected to the impeller. A rotational speed detector is fixedly installed on the discharge pipe. The detection end of the rotational speed detector has a belt tensioned on the traction wheel. A wheel disc is fixedly installed on the shaft of the traction wheel. A plurality of electric brushes are fixedly installed on the side surface of the wheel disc. The electric brushes are evenly distributed in a circular shape. A brush plate is fixedly installed on the discharge pipe. The brush plate is adjacent to the rotational trajectory of the electric brushes. A signal controller is fixedly installed on the brush plate. The signal controller is electrically connected to the brush plate. The signal controller is signal-connected to the motor.

[0015] A fault warning and monitoring method uses the above-mentioned gear pump.

[0016] Compared with the prior art, the present invention provides a gear pump, which has the following beneficial effects: 1. After the gear pump is installed at the position where it needs to be used, the rotation of the first pump gear and the second pump gear as a whole generates centrifugal force and pressure difference in the pump head, so that the liquid in the pump head is transported from the inlet end of the pump head to the discharge end of the pump head. And when there are operation problems due to the shaft offset of the first pump gear or the second pump gear, the shaft offset of the first pump gear or the second pump gear synchronously drives the side wheels to generate offset. After the side wheels are offset, they will touch each other, causing friction between the side wheels, and the friction will generate a friction sound for warning and monitoring. Or after the side wheels are offset, they will touch the ratchet wheel. The rotation of the side wheels will cause friction with the ratchet wheel. Similarly, the generated sound is used for warning and monitoring. Thus, when the gear pump is running, if there are problems with the internal operation structure of the gear pump, the contact between the side wheels and the ratchet wheel is used to monitor the running state of the gear pump and give a sound warning, effectively monitoring the operation of the gear pump and reminding the worker to deal with the problems generated by the gear pump in time, improving the stability of the gear pump operation.

[0017] 2. Through the settings of the friction bumps, toothed belt, and elastic pieces, different sound combinations are used to distinguish different problem states in the gear pump, facilitating the staff to make different solutions to the problems of the gear pump, improving the applicability of monitoring the gear pump in this way, and improving the stability of the gear pump operation from the side.

[0018] 3. The gear pump, through the arrangement of brushes, brush plates and signal controller, can timely and stably control the gear pump to stop running when the gear pump is completely unable to operate normally. This can avoid more serious damage to the gear pump, provide certain protection for the gear pump, improve the convenience of monitoring the operation of the gear pump, and further improve the applicability of monitoring the operating status of the gear pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure distribution at the pump head of the present invention; Figure 2 It is a schematic diagram of the pump mechanism structure of the present invention; Figure 3 This is a schematic diagram of the internal structure distribution of the pump head of the present invention; Figure 4 This is a schematic diagram of the monitoring mechanism structure of the present invention; Figure 5 This is a schematic diagram of the structure distribution of the side wheels of the present invention; Figure 6 This is a schematic diagram of the internal structure distribution of the pipe of the present invention; Figure 7 This is a schematic diagram of the structure distribution of the roulette wheel of the present invention; Figure 8 It is a schematic diagram of the overall structure of the gear pump of the present invention.

[0020] In the figure: 1. base; 2. pump mechanism; 21. motor; 22. coupling; 23. pump head; 24. first pump gear; 25. second pump gear; 26. bearing seat; 3. monitoring mechanism; 31. first auxiliary gear; 32. second auxiliary gear; 33. side wheel; 34. friction bump; 35. toothed belt; 36. ratchet; 37. toggle plate; 38. spring; 39. partition cover; 310. observation window; 311. discharge pipe; 312. impeller; 313. traction wheel; 314. speed detector; 315. belt; 316. wheel; 317. brush; 318. brush plate; 319. signal controller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a gear pump and a fault warning monitoring method thereof.

[0023] Example 1. In a typical embodiment of the present application, as Figure 1 shown, a gear pump includes a base 1, a pump mechanism 2 disposed on the base 1, and a monitoring mechanism 3 disposed on the pump mechanism 2. The pump mechanism 2 includes a pump head 23, a first pump gear 24, and a second pump gear 25. The pump head 23 is disposed on the base 1. The first pump gear 24 is disposed inside the pump head 23, and the second pump gear 25 is disposed inside the pump head 23. The first pump gear 24 meshes with the second pump gear 25. The first pump gear 24 is located directly above the second pump gear 25. The overall dimensions of the first pump gear 24 and the second pump gear 25 are adapted to the internal dimensions of the pump head 23. The monitoring mechanism 3 includes side wheels 33 and ratchets 36. A plurality of side wheels 33 are disposed on the pump head 23. The side wheels 33 are respectively in power connection with the first pump gear 24 and the second pump gear 25. The axes of the side wheels 33 are respectively on the same straight line as the axes of the first pump gear 24 and the second pump gear 25. There are gaps between the side wheels 33. A plurality of ratchets 36 are disposed on the pump head 23. The ratchets 36 are respectively located above and below the overall side wheels 33. There is a gap between the ratchets 36 and the side wheels 33. When the first pump gear 24 or the second pump gear 25 is offset, the side wheels 33 come into contact with each other or the side wheels 33 come into contact with the ratchets 36.

[0024] When using the present invention: After installing the gear pump at the position where it is needed, start the gear pump. The first pump gear 24 rotates, and the first pump gear 24 drives the second pump gear 25 to rotate. The overall rotation of the first pump gear 24 and the second pump gear 25 generates a centrifugal force and a pressure difference inside the pump head 23, so that the liquid inside the pump head 23 is transported from the inlet end of the pump head 23 to the discharge end of the pump head 23. At the same time, the opposite rotation of the first pump gear 24 and the second pump gear 25 drives the side wheels 33 to rotate in the opposite direction. As the use time of the gear pump becomes longer, there may be operating problems inside the gear pump that cause failures. For example, the shaft of the first pump gear 24 or the second pump gear 25 is offset. At this time, the offset of the shaft of the first pump gear 24 or the second pump gear 25 synchronously drives the side wheels 33 to generate an offset. After the side wheels 33 are offset, they will come into contact with each other, causing friction between the side wheels 33, and the friction will generate a friction sound for warning and monitoring. Or after the side wheels 33 are offset, they will come into contact with the ratchets 36, and the rotation of the side wheels 33 will cause friction with the ratchets 36. Similarly, the generated sound is used for warning and monitoring. Thus, when the gear pump is operating, if there are problems with the internal operating structure of the gear pump, the contact between the side wheels 33 and the ratchets 36 is used to monitor the operating state of the gear pump and give a sound warning, effectively monitoring the operation of the gear pump, reminding the worker to timely handle the problems generated by the gear pump, and improving the operating stability of the gear pump.

[0025] Example 2, as Figures 2 - 3As shown, the difference from the above embodiment is that the pump mechanism 2 further includes a motor 21. The motor 21 is fixedly installed on the base 1. The motor 21 is located on one side of the base 1, and the shaft of the motor 21 faces the other side of the base 1. A pump head 23 is fixedly installed on the base 1. The pump head 23 is located on the other side of the base 1. The pump head 23 is at the same height as the shaft of the motor 21. The inlet end of the pump head 23 is located on one side of the base 1, and the discharge end of the pump head 23 is located on the other side of the base 1. A coupling 22 is provided between the motor 21 and the pump head 23. One end of the coupling 22 is fixedly connected to the shaft of the motor 21, and the other end of the coupling 22 extends into the pump head 23. The coupling 22 is sealed with the pump head 23.

[0026] Further, a first pump gear 24 is rotatably fitted in the pump head 23, and a second pump gear 25 is rotatably fitted in the pump head 23. The first pump gear 24 is directly above the second pump gear 25. The size of the first pump gear 24 is the same as that of the second pump gear 25. The shaft of the first pump gear 24 is fixedly connected to the coupling 22. The position between the first pump gear 24 and the second pump gear 25 is at the same height as the inlet end of the pump head 23. The position between the first pump gear 24 and the second pump gear 25 is at the same height as the discharge end of the pump head 23.

[0027] Further, a plurality of bearing seats 26 are fixedly installed in the pump head 23. The bearing seats 26 are at the same height as the shafts of the first pump gear 24 and the second pump gear 25 respectively. The shaft of the first pump gear 24 is rotatably fitted with the bearing seat 26, and the shaft of the second pump gear 25 is rotatably fitted with the bearing seat 26. The shaft of the first pump gear 24 penetrates through the bearing seat 26, and the shaft of the first pump gear 24 penetrates through the pump head 23. The position where the shaft of the first pump gear 24 on the pump head 23 penetrates through the pump head 23 is sealed with the bearing seat 26. The position where the shaft of the second pump gear 25 on the pump head 23 penetrates through the pump head 23 is sealed with the bearing seat 26.

[0028] Among them, when running the gear pump, start the motor 21. The motor 21 drives the coupling 22 to rotate. The coupling 22 drives the first pump gear 24 to rotate. The first pump gear 24 drives the second pump gear 25 to rotate in opposite directions, so that the first pump gear 24 and the second pump gear 25 rotate in opposite directions on the bearing seats 26 in the pump head 23, so that the first pump gear 24 and the second pump gear 25 convey the liquid from the inlet end of the pump head 23 to the discharge end of the pump head 23.

[0029] Embodiment 3, as Figures 4 - 8As shown, the difference from the above embodiment is that the monitoring mechanism 3 further includes a first auxiliary gear 31. The first auxiliary gear 31 is provided on the pump head 23. The shaft of the first auxiliary gear 31 is fixedly connected to the shaft of the first pump gear 24. A second auxiliary gear 32 is provided on the pump head 23. The shaft of the second auxiliary gear 32 is fixedly connected to the shaft of the second pump gear 25. The size of the first auxiliary gear 31 is the same as that of the second auxiliary gear 32, and the first auxiliary gear 31 meshes with the second auxiliary gear 32.

[0030] Further, side wheels 33 are fixedly installed on both the first auxiliary gear 31 and the second auxiliary gear 32. A plurality of friction bumps 34 are fixedly installed on the side surfaces of the side wheels 33. The friction bumps 34 are evenly distributed on each side wheel 33. There is a gap between the bottom end of the movement track of the friction bumps 34 on the upper side wheel 33 and the top end of the movement track of the friction bumps 34 on the lower side wheel 33. When the movement tracks of the friction bumps 34 on the upper and lower sides overlap, the friction bumps 34 rub against each other to produce a sound.

[0031] Further, the gap range between the friction bumps 34 is 1 mm - 5 mm. When the shafts of the first pump gear 24 and the second pump gear 25 are offset, it will affect the conveying efficiency of the gear pump. Once the offset exceeds 5 mm, the meshing part between the first pump gear 24 and the second pump gear 25 is extremely compressed, resulting in the gear pump being unable to operate.

[0032] Among them, when the shafts of the first pump gear 24 and the second pump gear 25 are offset towards each other, that is, when the first pump gear 24 and the second pump gear 25 are offset towards each other on the bearing seat 26, the first pump gear 24 and the second pump gear 25 respectively drive the first auxiliary gear 31 and the second auxiliary gear 32 to offset, so that the first pump gear 24 and the second pump gear 25 rotate towards each other to drive the first auxiliary gear 31 and the second auxiliary gear 32 to rotate towards each other. The first auxiliary gear 31 and the second auxiliary gear 32 drive the side wheels 33 to rotate towards each other. As the offset makes the movement tracks of the friction bumps 34 overlap, the rotation of the side wheels 33 drives the friction bumps 34 to rotate. The friction bumps 34 rotate and rub against each other, so that the friction bumps 34 rub against each other to produce a sound for warning and monitoring.

[0033] Furthermore, a toothed belt 35 is tensioned on the overall side wheel 33, and a plurality of ratchets 36 are rotatably fitted on the pump head 23. The ratchets 36 are symmetrically distributed beside the top and bottom ends of the toothed belt 35, and there is a gap between the ratchet 36 and the toothed belt 35. A plurality of toggle plates 37 are fixedly installed on the shafts of the ratchets 36. The toggle plates 37 are evenly distributed in a circular shape on the shafts of the respective ratchets 36. A plurality of elastic pieces 38 are fixedly installed on the pump head 23. Each elastic piece 38 is adjacent to each toggle plate 37. The elastic piece 38 is located on the rotation trajectory of the toggle plate 37. A partition cover 39 is fixedly installed on the pump head 23. The partition cover 39 is a hollow structure. The first auxiliary gear 31, the second auxiliary gear 32, the side wheel 33, the friction bump 34, the toothed belt 35, the ratchet 36, the toggle plate 37, and the elastic piece 38 are all located inside the partition cover 39. An observation window 310 is provided on the partition cover 39. The observation window 310 penetrates the wall surface of the partition cover 39. The observation window 310 is made of glass structure, and the observation window 310 is sealed with the partition cover 39.

[0034] Furthermore, the gap range between the toothed belt 35 and the ratchet 36 is 1 mm - 5 mm. When the shafts of the first pump gear 24 and the second pump gear 25 are offset, causing excessive separation between the teeth, problems also occur in the operation of the gear pump, and the toothed belt 35 comes into contact with the ratchet 36. When the offset exceeds 5 mm, the teeth between the first pump gear 24 and the second pump gear 25 are completely separated, and no cavity is formed at the meshing part. The centrifugal force no longer forms a pressure difference between the inlet end and the discharge end of the pump head 23, and the gear pump will also completely stop running.

[0035] Among them, when the shafts of the first pump gear 24 and the second pump gear 25 are offset away from each other, that is, when the first pump gear 24 and the second pump gear 25 are offset away from each other on the bearing seat 26, the first pump gear 24 and the second pump gear 25 respectively drive the side wheel 33 to rotate. The side wheel 33 drives the toothed belt 35 to rotate. At this time, since the toothed belt 35 is tensioned on the side wheel 33, although the side wheels 33 rotate in opposite directions, due to the clamping and squeezing of the toothed belt 35 by the side wheel 33 and the ratchet 36, the toothed belt 35 is driven to rotate on one side wheel 33 and generates a sound due to friction with the other side wheel 33. At the same time, the rotation of the toothed belt 35 drives the ratchet 36 to rotate, and the ratchet 36 drives the toggle plate 37 to rotate. The toggle plate 37 toggles the elastic piece 38, causing the elastic piece 38 to generate a sound. At this time, the sound generated by the elastic piece 38 and the sound generated by the friction appear simultaneously, so as to distinguish the friction sound that appears alone during relative offset. Thus, when the offset between the shafts of the first pump gear 24 and the second pump gear 25 is between 1 mm and 5 mm, two different types of sounds are used to warn and monitor the gear pump, and the fault types of the gear pump are distinguished thereby.

[0036] Further, a discharge pipe 311 is fixedly installed at the discharge end of the pump head 23. The water inlet end of the discharge pipe 311 is communicated with the pump head 23. One side of the discharge pipe 311 is connected to the pump head 23, and the other side of the discharge pipe 311 is the water discharge end. The water inlet end of the discharge pipe 311 is located above the water discharge end of the discharge pipe 311. An impeller 312 is rotatably fitted in the discharge pipe 311, and the impeller 312 is adapted to the interior of the discharge pipe 311.

[0037] Among them, after the pump head 23 discharges the liquid at the discharge end, the liquid enters the discharge pipe 311, and the impact force of the liquid drives the impeller 312 to rotate in the discharge pipe 311.

[0038] Further, a traction wheel 313 is rotatably fitted on the discharge pipe 311. The traction wheel 313 is power-connected to the impeller 312. A rotational speed detector 314 is fixedly installed on the discharge pipe 311. The detection end of the rotational speed detector 314 has a belt 315 tensioned on the traction wheel 313. A wheel disc 316 is fixedly installed on the shaft of the traction wheel 313. A plurality of electric brushes 317 are fixedly installed on the side surface of the wheel disc 316. The electric brushes 317 are evenly distributed in a circular shape. A brush plate 318 is fixedly installed on the discharge pipe 311. The brush plate 318 is adjacent to the rotation trajectory of the electric brushes 317. A signal controller 319 is fixedly installed on the brush plate 318. The signal controller 319 is electrically connected to the brush plate 318, and the signal controller 319 is signal-connected to the motor 21.

[0039] Further, when the axes of the first pump gear 24 and the second pump gear 25 are offset greatly (exceeding 5 mm), the gear pump cannot operate at this time, and the monitoring of the friction sound is no longer sufficient for the effect of the gear pump. At this time, the detection of the discharge volume of the pump head 23 by the electric brushes 317 and the brush plate 318 can be used. When the gear pump cannot operate (when the discharge volume disappears), an intermittent current signal is no longer generated between the electric brushes 317 and the brush plate 318. At this time, either there is always a current signal or there is always no current signal. The two situations can be used to judge that the gear pump no longer generates a conveying function at this time, so as to use the signal controller 319 to control the motor 21 to stop operating to avoid losses and prevent the overall damage of the supporting operating equipment caused by the damage of the gear pump.

[0040] Among them, as the impeller 312 rotates, the impeller 312 drives the traction wheel 313 to rotate, the traction wheel 313 drives the belt 315 to rotate, and the belt 315 drives the detection end of the rotational speed detector 314 to rotate to detect the rotational speed of the impeller 312, thereby monitoring the flow rate of the gear pump. At the same time, the rotation of the traction wheel 313 drives the disk 316 to rotate, and the disk 316 drives the brush 317 to rotate, causing the overall brush 317 to intermittently contact the brush plate 318, so that the signal controller 319 intermittently receives current signals. When the current signals are received intermittently, the gear pump is operating normally at this time. When the current signals are received intermittently and there is a frictional sound or the sound of the shrapnel 38 is generated simultaneously, the gear pump can still operate at this time, but there are already problems with the gear pump. When the signal controller 319 continuously receives current signals or is unable to receive current signals all the time, it indicates that the gear pump can no longer operate normally. At this time, the signal controller 319 controls the motor 21 to stop running, that is, stops the operation of the gear pump, so that the entire gear pump no longer operates, avoiding further damage to the gear pump and providing a certain protection for the gear pump.

[0041] Working principle of the whole gear pump: After installing the gear pump at the position where it is needed, start the gear pump. The first pump gear 24 rotates, and the first pump gear 24 drives the second pump gear 25 to rotate. The rotation of the first pump gear 24 and the second pump gear 25 as a whole generates centrifugal force and pressure difference in the pump head 23, so that the liquid in the pump head 23 is transported from the inlet end of the pump head 23 to the discharge end of the pump head 23. At the same time, the opposite rotation of the first pump gear 24 and the second pump gear 25 drives the side wheels 33 to rotate in opposite directions. As the usage time of the gear pump becomes longer, there may be operating problems inside the gear pump resulting in failures. For example, the shafts of the first pump gear 24 or the second pump gear 25 are offset. At this time, the offset of the shafts of the first pump gear 24 or the second pump gear 25 synchronously drives the side wheels 33 to be offset. After the side wheels 33 are offset, they will touch each other, causing friction between the side wheels 33, and the friction will generate a frictional sound for warning and monitoring. Or after the side wheels 33 are offset, they will touch the ratchet 36, and the rotation of the side wheels 33 will cause friction with the ratchet 36. Similarly, the generated sound is used for warning and monitoring. Thus, when the gear pump is operating, if there are problems with the internal operating structure of the gear pump, the contact between the side wheels 33 and the ratchet 36 is used to monitor the operating state of the gear pump and give a sound warning, effectively monitoring the operation of the gear pump and reminding the worker to timely handle the problems generated by the gear pump, improving the stability of the gear pump operation. When the gear pump is running, the motor 21 is started, the motor 21 drives the coupling 22 to rotate, the coupling 22 drives the first pump gear 24 to rotate, the first pump gear 24 drives the second pump gear 25 to rotate in opposite directions, so that the first pump gear 24 and the second pump gear 25 rotate in opposite directions on the bearing seat 26 in the pump head 23, so that the first pump gear 24 and the second pump gear 25 transport the liquid from the inlet end of the pump head 23 to the discharge end of the pump head 23, and the pump head 23 discharges the liquid at the discharge end and enters the discharge pipe 311, and the impact of the liquid drives the impeller 312 to rotate in the discharge pipe 311; When the axes of the first pump gear 24 and the second pump gear 25 are offset toward each other, that is, when the first pump gear 24 and the second pump gear 25 are offset toward each other on the bearing seat 26, the first pump gear 24 and the second pump gear 25 respectively drive the first auxiliary gear 31 and the second auxiliary gear 32 to offset, so that the first pump gear 24 and the second pump gear 25 rotate in opposite directions to drive the first auxiliary gear 31 and the second auxiliary gear 32 to rotate in opposite directions, and the first auxiliary gear 31 and the second auxiliary gear 32 drive the side wheels 33 to rotate in opposite directions, and with the offset, the running tracks of the friction protrusions 34 overlap, and the rotation of the side wheels 33 drives the friction protrusions 34 to rotate, and the friction protrusions 34 rotate and rub against each other, so that the friction protrusions 34 produce sounds for warning and monitoring; When the axes of the first pump gear 24 and the second pump gear 25 are offset from each other, that is, when the first pump gear 24 and the second pump gear 25 are offset from each other on the bearing seat 26, the first pump gear 24 and the second pump gear 25 respectively drive the side wheels 33 to rotate, and the side wheels 33 drive the toothed belt 35 to rotate. At this time, since the toothed belt 35 is tensioned on the side wheels 33, although the side wheels 33 rotate in opposite directions, the toothed belt 35 is driven to rotate on one side wheel 33 due to the clamping and squeezing of the toothed belt 35 by the side wheels 33 and the ratchet 36, and the toothed belt 35 is rotated with the other side wheel 33. The friction between the gears 35 generates a sound. At the same time, the rotation of the toothed belt 35 drives the ratchet 36 to rotate, and the ratchet 36 drives the toggle plate 37 to rotate. The toggle plate 37 toggle the spring 38, so that the spring 38 generates a sound. At this time, the sound generated by the spring 38 and the sound generated by the friction appear at the same time, so as to distinguish the friction sound that occurs alone when the relative offset occurs. Therefore, when the axial offset between the first pump gear 24 and the second pump gear 25 is between 1mm and 5mm, two different types of sounds are used to warn and monitor the gear pump, and to distinguish the fault type of the gear pump. As the impeller 312 rotates, the impeller 312 drives the traction wheel 313 to rotate. The traction wheel 313 drives the belt 315 to rotate. The belt 315 drives the detection end of the rotational speed detector 314 to rotate so as to detect the rotational speed of the impeller 312, thereby monitoring the flow rate of the gear pump. At the same time, the rotation of the traction wheel 313 drives the wheel disc 316 to rotate, and the wheel disc 316 drives the brush 317 to rotate, causing the overall brush 317 to intermittently contact the brush plate 318, so that the signal controller 319 intermittently receives current signals. When the current signals are intermittently received, the gear pump is operating normally at this time. When the current signals are intermittently received and there is a frictional sound or at the same time there is a sound of the shrapnel 38, the gear pump can still operate at this time, but there are already problems with the gear pump. When the signal controller 319 continuously receives current signals or is unable to receive current signals all the time, it indicates that the gear pump can no longer operate normally. At this time, the signal controller 319 controls the motor 21 to stop operating, that is, stops the operation of the gear pump, so that the entire gear pump no longer operates, avoiding further damage to the gear pump and providing a certain protection for the gear pump.

[0042] A fault warning and monitoring method uses the above-mentioned gear pump.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gear pump, comprising a base, a pump mechanism disposed on the base, and a monitoring mechanism disposed on the pump mechanism, characterized in that: The pump mechanism comprises a pump head, a first pump gear and a second pump gear. The pump head is arranged on the base, the first pump gear is arranged in the pump head, the second pump gear is arranged in the pump head, the first pump gear is meshed with the second pump gear, the first pump gear is located directly above the second pump gear, and the overall size of the first pump gear and the second pump gear is adapted to the size inside the pump head; The monitoring mechanism includes side wheels and ratchet wheels. The pump head is provided with a plurality of side wheels, and the side wheels are respectively connected to the first pump gear and the second pump gear in power. The axes of the side wheels are respectively located on the same straight line as the axes of the first pump gear and the second pump gear, and there is a gap between the side wheels. The pump head is provided with a plurality of ratchet wheels, and the ratchet wheels are respectively located above and below the overall side wheels. There is a gap between the ratchet wheels and the side wheels. When the first pump gear and the second pump gear are offset, the side wheels touch each other or the side wheels touch the ratchet wheels.

2. A gear pump according to claim 1, characterized in that: The pump mechanism also includes a motor, which is fixedly mounted on the base, the motor is located on one side of the base, and the shaft of the motor faces the other side of the base. The pump head is fixedly mounted on the base, the pump head is located on the other side of the base, the pump head is highly opposite to the shaft of the motor, the inlet end of the pump head is located on one side of the base, and the outlet end of the pump head is located on the other side of the base. A coupling is arranged between the motor and the pump head, one end of the coupling is fixedly connected to the shaft of the motor, and the other end of the coupling extends to the inside of the pump head, and the coupling and the pump head are sealed.

3. A gear pump according to claim 2, characterized in that: The first pump gear is rotatably fitted in the pump head, the second pump gear is rotatably fitted in the pump head, the first pump gear is located directly above the second pump gear, the size of the first pump gear is the same as the size of the second pump gear, the shaft of the first pump gear is fixedly connected to the coupling, the position between the first pump gear and the second pump gear is at the same height as the inlet end of the pump head, and the position between the first pump gear and the second pump gear is at the same height as the discharge end of the pump head.

4. A gear pump according to claim 3, characterized in that: A plurality of bearing seats are fixedly installed in the pump head, and the bearing seats are respectively located at the same height as the shafts of the first pump gear and the second pump gear, the shaft of the first pump gear is rotationally matched with the bearing seat, the shaft of the second pump gear is rotationally matched with the bearing seat, the shaft of the first pump gear passes through the bearing seat, the shaft of the first pump gear passes through the pump head, the position where the shaft of the first pump gear on the pump head passes through the pump head and is sealed with the bearing seat, and the position where the shaft of the second pump gear on the pump head passes through the pump head and is sealed with the bearing seat.

5. A gear pump according to claim 4, characterized in that: The monitoring mechanism also includes a first auxiliary gear, which is arranged on the pump head, and the shaft of the first auxiliary gear is fixedly connected to the shaft of the first pump gear. A second auxiliary gear is arranged on the pump head, and the shaft of the second auxiliary gear is fixedly connected to the shaft of the second pump gear. The size of the first auxiliary gear is the same as that of the second auxiliary gear, and the first auxiliary gear is meshed with the second auxiliary gear.

6. A gear pump according to claim 5, characterized in that: The side wheels are fixedly mounted on the first auxiliary gear and the second auxiliary gear, and a plurality of friction bumps are fixedly mounted on the sides of the side wheels, and the friction bumps are evenly distributed on each of the side wheels. There is a gap between the bottom end of the movement trajectory of the friction bump on the upper side wheel and the top end of the movement trajectory of the friction bump on the lower side wheel, and when the movement trajectories of the friction bumps on the upper and lower sides overlap, the friction bumps rub against each other to produce sound.

7. A gear pump according to claim 6, characterized in that: A toothed belt is tensioned on the overall side wheel, and a plurality of ratchets are rotatably cooperated on the pump head, the ratchets are symmetrically distributed beside the top end and the bottom end of the toothed belt, and there is a gap between the ratchet and the toothed belt, and a plurality of toggle plates are fixedly mounted on the shafts of the ratchet wheels, and the toggle plates are evenly distributed in a circular shape on the shafts of each of the ratchets, and a plurality of spring plates are fixedly mounted on the pump head, and each of the spring plates is adjacent to each of the toggle plates, and the spring plates are located on the rotation trajectory of the toggle plates, and a partition cover is fixedly mounted on the pump head, and the partition cover is a hollow structure, and the first auxiliary gear, the second auxiliary gear, the side wheel, the friction protrusion, the toothed belt, the ratchet, the toggle plate, and the spring plates are all located inside the partition cover, and an observation window is provided on the partition cover, and the observation window passes through the wall of the partition cover, and the observation window is a glass structure, and the observation window and the partition cover are sealed.

8. A gear pump according to claim 7, characterized in that: A discharge pipe is fixedly installed on the discharge end of the pump head, the water inlet end of the discharge pipe is connected to the pump head, one side of the discharge pipe is connected to the pump head, and the other side of the discharge pipe is the discharge end. The water inlet end of the discharge pipe is located above the discharge end of the discharge pipe, and an impeller is rotatably fitted inside the discharge pipe, and the impeller is adapted to the interior of the discharge pipe.

9. A gear pump according to claim 8, characterized in that: A traction wheel is rotatably mounted on the row of pipes, the traction wheel is dynamically connected to the impeller, a speed detector is fixedly mounted on the row of pipes, a belt is tensioned between the detection end of the speed detector and the traction wheel, a wheel disc is fixedly mounted on the shaft of the traction wheel, a plurality of brushes are fixedly mounted on the side of the wheel disc, the brushes are evenly distributed in a circular shape, a brush plate is fixedly mounted on the row of pipes, the brush plate is adjacent to the rotation track of the brush, a signal controller is fixedly mounted on the brush plate, the signal controller is electrically connected to the brush plate, and the signal controller is connected to the motor signal.

10. A fault early warning monitoring method, characterized in that: The gear pump according to any one of claims 1 to 9 is used.

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