CN211701748U - Cooling system of permanent magnet speed regulator - Google Patents

Abstract

The utility model relates to a cooling system of permanent magnet speed regulator, including closed loop cooling circulation route, closed loop cooling circulation route includes: base member, cooler and driver. The base body is used for mounting the permanent magnet rotor and the induction rotor and is provided with a coolant flow channel; the cooler is communicated with the coolant flow channel; the driver is used for driving the coolant to circularly flow between the coolant flow channel and the cooler. In the cooling system of the permanent magnet speed regulator, the base body is matched with the induction rotor and the permanent magnet rotor in an installing mode. Under the drive of the driver, the coolant circulates between the coolant flow passage and the cooler. Because the coolant flows in the closed loop cooling circulation path, the coolant can be prevented from contacting with air, dust is prevented from being deposited in the coolant, the coolant is further prevented from causing scaling of the induction rotor and the permanent magnet rotor, and the coolant can be prevented from corroding the induction rotor and the permanent magnet rotor.

Description

Cooling system of permanent magnet speed regulator

Technical Field

The utility model relates to a permanent magnet speed regulator technical field especially relates to a cooling system of permanent magnet speed regulator.

Background

The permanent magnet eddy current speed regulator is widely introduced gradually by the advantages of safety, reliability, energy conservation, environmental protection and the like, and utilizes the basic principle of electromagnetic induction, realizes power transmission through non-contact magnetic coupling, and adjusts the rotating speed of an output shaft through the change of an electromagnetic air gap.

The structure of the permanent magnet eddy current speed regulator mainly comprises an induction rotor, a permanent magnet rotor and a controller. The induction rotor is fixed on the motor shaft, the permanent magnet rotor is fixed on the load rotating shaft, and a gap (called an air gap) is formed between the induction rotor and the permanent magnet rotor. Therefore, the motor and the load are changed from the original hard (mechanical) connection into the soft (magnetic) connection, the output torque on the load shaft can be changed by adjusting the air gap between the permanent magnet and the copper conductor, so that the change of the rotating speed of the load is realized, and the air gap is controlled in different modes. The working principle is as follows: when the motor rotates, the induction rotor of the permanent magnet speed regulator is driven to cut magnetic lines of force in a strong magnetic field generated by the permanent magnet rotor, eddy current is generated in the conductor, and the eddy current is acted by the magnetic force to form electromagnetic damping and drive the load to move, so that torque transmission between the motor and the load is realized.

The eddy current in the induction rotor can cause the rotor to generate heat, the temperature rises, and when the permanent magnet exceeds a certain temperature, demagnetization can occur, so that the speed regulator fails. The more power the governor delivers, the more eddy currents it generates and the more heat the copper conductor heats up. At present, a speed regulator with larger power is generally in a water-cooled structure, and cooling water is sprayed to a working air gap by introducing an external pressure water source to realize cooling.

In order to avoid the phenomena of jamming and corrosion of the induction rotor and the permanent magnet rotor due to scaling, the desalted coolant is recycled to cool the induction rotor and the permanent magnet rotor. After the induction rotor and the permanent magnet rotor are used for a period of time, the phenomena of jamming and corrosion still occur.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses lie in overcoming prior art's defect, provide a cooling system of permanent magnet speed regulator, solve induction rotor and permanent magnet rotor and appear jamming, corrosion phenomenon.

A cooling system for a permanent magnet governor, comprising a closed loop cooling circulation path that includes: base member, cooler and driver. The base body is used for mounting the permanent magnet rotor and the induction rotor and is provided with a coolant flow channel; the cooler is communicated with the coolant flow channel; the driver is used for driving the coolant to circularly flow between the coolant flow channel and the cooler.

In the cooling system of the permanent magnet speed regulator, the base body is matched with the induction rotor and the permanent magnet rotor in an installing mode. Under the drive of the driver, the coolant circulates between the coolant flow passage and the cooler. After absorbing the heat of the induction rotor and the permanent magnet rotor, the circulating coolant transfers the heat of the induction rotor and the permanent magnet rotor through the cooler. Because the coolant flows in the closed loop cooling circulation path, the coolant can be prevented from contacting with air, dust is prevented from being deposited in the coolant, the coolant is further prevented from causing scaling of the induction rotor and the permanent magnet rotor, and the coolant can be prevented from corroding the induction rotor and the permanent magnet rotor.

In one embodiment, the drive is an infusion pump. The manner in which the coolant flow is driven by the infusion pump is simple.

In one embodiment, the base body is provided with a first inlet and a first outlet which are communicated with the coolant flow channel; the cooler is provided with a second inlet and a second outlet, the second inlet is communicated with the first outlet, and the second outlet is communicated with the first inlet; two ends of the infusion pump are respectively communicated with the first outflow port and the second inflow port so as to be used for driving the coolant to flow into the second inflow port from the first outflow port; or the two ends of the infusion pump are respectively communicated with the second outflow port and the first inflow port so as to be used for driving the coolant to flow into the first inflow port from the second outflow port. This facilitates circulation of the coolant between the cooler and the coolant flow passage.

In one embodiment, the closed-loop cooling circulation path further includes a first driving branch and a second driving branch, one end of the first driving branch and one end of the second driving branch are both communicated with the first outflow port, and the other end of the first driving branch and the other end of the second driving branch are communicated with the second inflow port; the infusion pump comprises a first infusion pump and a second infusion pump, the first infusion pump is connected to the first driving branch, and the second infusion pump is connected to the second driving branch.

In one embodiment, the closed-loop cooling circulation path further comprises a liquid storage tank, and two ends of the liquid storage tank are respectively communicated with the first flow outlet and the second flow inlet; or the two ends of the liquid storage tank are respectively communicated with the second flow outlet and the first flow inlet.

In one embodiment, the base body is provided with a mounting cavity, the mounting cavity is used for mounting the permanent magnet rotor and the induction rotor, and the inner wall of the mounting cavity surrounds the coolant flow channel.

In one embodiment, the closed loop cooling circulation path further comprises a flow meter and a flow regulating valve; the flow meter is used for detecting the flow of the coolant flowing into the coolant flow channel; one end of the flow regulating valve is communicated with the second outflow port, and the other end of the flow regulating valve is communicated with the liquid storage tank; the flow regulating valve is used for regulating and controlling the flow of the coolant flowing into the first inlet.

In one embodiment, the closed loop cooling circulation path further comprises a first filter for removing impurities from the coolant flowing through the coolant flow passage.

In one embodiment, the closed loop cooling circulation path further comprises a first stop valve, a second stop valve, a third stop valve, a first diversion leg, and a second diversion leg; one end of the first flow guide branch and one end of the second flow guide branch are both communicated with the driver, and the other end of the first flow guide branch and the other end of the second flow guide branch are communicated with the second flow inlet; the first stop valve is connected to the first diversion branch; the second stop valve, the first filter and the third stop valve are sequentially connected in series in the second flow guide branch.

In one embodiment, the closed loop cooling circulation path further comprises a first temperature gauge for sensing a temperature of the coolant flowing into the coolant flow passage and a second temperature gauge for sensing a temperature of the coolant flowing out of the coolant flow passage.

Drawings

FIG. 1 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 2 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 3 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 4 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 5 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 6 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 7 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 8 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 9 is a schematic diagram of a closed loop cooling circulation path according to an exemplary embodiment;

FIG. 10 is a schematic diagram of a closed loop cooling circulation path according to an embodiment.

Description of reference numerals: 10. a closed loop cooling circulation path, 110, a base body, 111, a coolant flow channel, 111a, an installation cavity, 112, a first inlet port, 113, a first outlet port, 120, a cooler, 121, a second inlet port, 122, a second outlet port, 130, a driver, 131, an infusion pump, 131a, a first infusion pump, 131b, a second infusion pump, 141, a first driving branch, 142, a second driving branch, 143, a first check valve, 144, a second check valve, 145, a first ball valve, 146, a second ball valve, 147, a third ball valve, 148, a fourth ball valve, 150, a reservoir, 161, a flow meter, 162, a flow regulating valve, 171, a first filter, 172, a first diversion branch, 173, a second diversion branch, 174, a first stop valve, 175, a second stop valve, 176, a third stop valve, 181, a first thermometer, 182, a second thermometer, 191, a first pressure gauge, 192, a second flow meter, and a second flow meter, Second pressure gauge, 193, third pressure gauge.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

When the desalted coolant is circulated to cool the induction rotor and the permanent magnet rotor, the desalted coolant generally dissipates heat through air. However, since the air contains dust, the dust in the air is deposited in the desalted coolant. So when the coolant was cooled down induction rotor and permanent magnet rotor, the dust can be fixed in induction rotor and permanent magnet rotor with the mode of scale deposit on, so induction rotor and permanent magnet rotor still appear the bite phenomenon.

In view of the foregoing, and as shown in fig. 1, 2 and 3, an embodiment of the present invention provides a cooling system for a permanent magnet governor. The cold zone system of the permanent magnet governor includes a closed loop cooling circulation path 10, the closed loop cooling circulation path 10 including: a base 110, a cooler 120, and a driver 130; the base body 110 is used for mounting a permanent magnet rotor and an induction rotor, and a coolant flow channel 111 is arranged on the base body 110; the cooler 120 is in communication with the coolant flow passage 111; the driver 130 is used to drive the coolant to circulate between the coolant flow channel 111 and the cooler 120.

In the cooling system of the permanent magnet governor described above, the base 110 is mounted in cooperation with the induction rotor and the permanent magnet rotor in use. The coolant circulates between the coolant flow passage 111 and the cooler 120 by the driving of the driver 130. The heat of the induction rotor and the permanent magnet rotor is transferred by the cooler 120 after the heat of the induction rotor and the permanent magnet rotor is absorbed by the circulating coolant. Since the coolant flows in the closed-loop cooling circulation path 10, the coolant is prevented from contacting with air, dust is prevented from being deposited in the coolant, the coolant is prevented from causing scaling of the induction rotor and the permanent magnet rotor, and the coolant is prevented from corroding the induction rotor and the permanent magnet rotor.

It should be understood that the coolant suitable for use in the cooling system of the aforementioned permanent magnet governor may be a liquid or a mixture of gas and liquid. And it should be understood that the coolant does not contain substances that cause fouling of the permanent magnet rotor and the induction rotor.

It should be noted that there are various ways in which the cooler 120 transfers heat. For example: air cooling, water cooling, and the like.

In one embodiment, the driver 130 may also be a pressure applicator. When the driver 130 is a pressure applicator, the cooler 120 has the capability of being variable in volume under pressure, the pressure applicator being in pressure adjustable abutting engagement with the cooler 120, the volume of the cooler 120 being variable by adjusting the pressure applied by the pressure applicator to the cooler 120. For example: when the pressure applied from the pressure applicator to the cooler 120 is increased, the volume of the cooler 120 is reduced, and the coolant flows from the cooler 120 to the coolant flow passage 111. When the pressure applied to the cooler 120 by the pressure applicator decreases, the volume of the cooler 120 increases, and the coolant flows into the cooler 120 through the coolant flow passage 111.

Specifically, the pressure applicator may be a device such as a hydraulic cylinder or an air cylinder, the actuating end of which can reciprocate.

The cooler 120 adapted to the aforementioned pressure applicator includes, but is not limited to, the following structure to achieve a variable volume.

For example: the cooler 120 comprises a cooler body and a sealing plug, the cooler body is provided with a containing cavity, the sealing plug is installed in the containing cavity and is in sealing fit with the inner wall of the containing cavity, and the sealing plug and the inner wall of the containing cavity enclose a cooling cavity communicated with the coolant flow channel 111. The sealing plug is connected with the execution end of the pressure applicator, and when the pressure applied to the plug body by the pressure applicator changes, the sealing plug moves relative to the accommodating cavity, so that the volume of the cooling cavity is changed, and the coolant can circularly flow in the cooler 120 and the coolant flow passage 111.

Or, the cooler 120 includes a cooler body and a flexible film, the cooler body is provided with an accommodating cavity, the flexible film is in sealing fit with the inner wall of the accommodating cavity, and the flexible film and the inner wall of the accommodating cavity enclose a cooling cavity communicated with the coolant flow channel 111. The flexible membrane is connected with the execution end of the pressure applicator, and the flexible membrane can be deformed by applying pressure change to the flexible membrane through the pressure applicator, so that the volume of the cooling cavity is changed, and the coolant can circularly flow in the cooler 120 and the coolant flow channel 111.

In one embodiment, as shown in fig. 1 and 2, the driver 130 is an infusion pump 131. The structure of driving the coolant to circulate by taking the infusion pump 131 as the driver 130 is simple.

As shown in fig. 1, the infusion pump 131 can perform bidirectional infusion. The infusion pump 131 can drive the coolant from the coolant flow channel 111 to the cooler 120, and the infusion pump 131 can also drive the coolant from the cooler 120 to the coolant flow channel 111.

Of course, the infusion pump 131 may also be used for unidirectional infusion as shown in fig. 2. The infusion pump 131 can drive the coolant from the coolant flow channel 111 to the cooler 120, and the coolant in the cooler 120 flows into the coolant flow channel 111 through a channel (not shown) connected to the closed-loop cooling circulation path 10. Alternatively, as shown in fig. 3, the infusion pump 131 may drive the coolant from the cooler 120 into the coolant flow channel 111, and the coolant in the coolant flow channel 111 flows into the cooler 120 through a channel (not shown) connected to the closed-loop cooling circulation path 10.

Specifically, referring to fig. 2, in one embodiment, the base 110 is provided with a first inlet 112 and a first outlet 113 communicating with the coolant flow channel 111; the cooler 120 has a second inlet 121 and a second outlet 122, the second inlet 121 is communicated with the first outlet 113, and the second outlet 122 is communicated with the first inlet 112. The two ends of the infusion pump 131 are respectively communicated with the first outlet 113 and the second inlet 121, so as to drive the coolant to flow from the first outlet 113 to the second inlet 121.

It should be understood that the connection and positional relationship of the infusion pump 131 within the closed cooling circulation path 10 includes, but is not limited to, the foregoing embodiments, and that the connection positional relationship of the infusion pump 131 may be in other manners. For example: as shown in fig. 3, two ends of the infusion pump 131 are respectively communicated with the second outlet 122 and the first inlet 112, so as to drive the coolant to flow from the second outlet 122 into the first inlet 112.

It should be noted that, by adjusting the infusion pump 131, the flow rate of the coolant circulating can be adjusted, and the cooling effect on the induction rotor and the permanent magnet rotor can be controlled. Specifically, the infusion pump may be an inverter pump, and the flow rate of the coolant circulating flow is adjusted by changing the output power of the inverter pump; or a pump set consisting of at least two infusion pumps, and the flow rate of the circulating coolant is adjusted by changing the number of the started infusion pumps.

As shown in fig. 4, the closed-loop cooling circulation path 10 further includes a first driving branch 141 and a second driving branch 142, wherein one end of the first driving branch 141 and one end of the second driving branch 142 are both communicated with the first outlet 113, and the other end of the first driving branch 141 and the other end of the second driving branch 142 are communicated with the second inlet 121.

The infusion pump 131 comprises a first infusion pump 131a and a second infusion pump 131b, the first infusion pump 131a is connected to the first driving branch 141, and the second infusion pump 131b is connected to the second driving branch 142.

There are various ways of using the first infusion pump 131a and the second infusion pump 131 b. For example:

the first method is as follows: when the infusion capacity of one of the first infusion pump 131a and the second infusion pump 131b can satisfy the cooling effect of the permanent magnet rotor and the induction rotor, one of the first infusion pump 131a and the second infusion pump 131b is used as a common pump, and the other one is used as a used pump. The backup pump may be used to deliver coolant in place of the conventional pump when the conventional pump is inactive.

The second method comprises the following steps: when the heat generation amounts of the induction rotor and the permanent magnet rotor are low, one of the first infusion pump 131a and the second infusion pump 131b is operated. When the induction rotor and the permanent magnet rotor generate a high amount of heat, the first infusion pump 131a and the second infusion pump 131b are operated at the same time.

Further, referring to fig. 4, in an embodiment, the closed-loop cooling circulation path 10 further includes a first check valve 143 and a second check valve 144.

The first check valve 143 and the first infusion pump 131a are connected in series in the first driving branch 141. Specifically, the first check valve 143 is located at an outlet side of the first infusion pump 131 a.

The second one-way valve 144 and the second infusion pump 131b are connected in series in the second drive branch 142. Specifically, the second one-way valve 144 is located on the outlet side of the second infusion pump 131 b.

Further, as shown in conjunction with fig. 4, in one embodiment, the closed-loop cooling circulation path 10 further includes a first ball valve 145, a second ball valve 146, a third ball valve 147, and a fourth ball valve 148.

A first ball valve 145 and a second ball valve 146 are connected in series in the first driving branch 141, and the first ball valve 145 and the second ball valve 146 are respectively located at an inlet side and an outlet side of the first infusion pump 131 a. By closing the first and second ball valves 145 and 146, the first infusion pump 131a can be replaced and maintained without leaking the coolant.

A third ball valve 147 and a fourth ball valve 148 are connected in series in the second drive branch 142, and the third ball valve 147 and the fourth ball valve 148 are located on the inlet side and the outlet side of the second infusion pump 131b, respectively. By closing the third ball valve 147 and the fourth ball valve 148, the second infusion pump 131b can be replaced and maintained without leaking the coolant.

In one embodiment, as shown in fig. 5, the closed-loop cooling circulation path 10 further includes a liquid storage box 150, and both ends of the liquid storage box 150 are respectively communicated with the first outlet 113 and the second inlet 121.

Further, as shown in fig. 5, one end of the liquid storage tank 150 communicates with the first outlet 113, the other end of the liquid storage tank 150 communicates with one end of the liquid delivery pump 131, and the other end of the liquid delivery pump 131 communicates with the second inlet 121.

The coolant in the coolant flow channel 111 flows back into the reservoir 150, and the liquid feeding pump 131 drives the coolant in the reservoir 150 to flow through the cooler 120 and the coolant flow channel 111 in this order.

It should be understood that the connection, positional relationship of the reservoir 150 within the closed loop cooling circulation path 10 includes, but is not limited to, the foregoing embodiments. For example: the two ends of the liquid storage tank 150 are respectively communicated with the second outlet 122 and the first inlet 112 (not shown).

It should be noted that the ability of the closed loop cooling circuit 10 to store coolant is enhanced by the reservoir 150.

Specifically, the tank 150 is provided with an openable and closable cleaning hole (not shown) through which the tank can be periodically cleaned. The reservoir 150 is provided with a level gauge (not shown) for observing the level of the coolant in the reservoir.

In an embodiment, as shown in fig. 6, the base 110 is provided with a mounting cavity 111a, the mounting cavity 111a is used for mounting a permanent magnet rotor and an induction rotor, and an inner wall of the mounting cavity 111a encloses the coolant flow channel 111.

In use, when the coolant flows in the coolant flow channel 111 defined by the inner wall of the mounting cavity 111a, the coolant can directly exchange heat with the permanent magnet rotor and the induction rotor; of course, the air in the mounting cavity 111a can indirectly exchange heat with the permanent magnet rotor and the induction rotor; alternatively, heat exchange is performed with the permanent magnet rotor and the induction rotor through the base 110.

Referring to fig. 6, in an embodiment, the closed cooling circulation path 10 further includes a first pressure gauge 191, and the first pressure gauge 191 is used for detecting the pressure of the coolant flowing into the installation cavity 111 a.

The infusion pump 131 drives the coolant to spray on the permanent magnet rotor or the induction rotor. The cooling effect of the coolant on the permanent magnet rotor and the induction rotor can be controlled by controlling the pressure of the coolant sprayed on the permanent magnet rotor or the induction rotor.

It should be noted that, when the spraying pressure of the coolant to the permanent magnet rotor and the induction rotor is within a certain pressure range, the cooling effect of the permanent magnet rotor and the induction rotor is increased along with the increase of the spraying pressure of the coolant. In this manner, an operator may adjust the power of the infusion pump 131 via the pressure gauge to control the pressure at which the coolant is sprayed on the induction and permanent magnet rotors.

In one embodiment, as shown in fig. 7, the closed-loop cooling circulation path 10 further includes a flow meter 161 and a flow regulating valve 162.

The flow meter 161 is used for detecting the flow of the coolant flowing into the coolant flow passage 111; one end of the flow control valve 162 is communicated with the second outlet 122, and the other end of the flow control valve 162 is communicated with the liquid storage tank 150; the flow regulating valve 162 is used to regulate the flow of the coolant flowing into the first inlet 112.

When the permanent magnet rotor and the induction rotor are immersed in the coolant accumulated in the mounting cavity 111a, the coolant may generate resistance against rotation of the permanent magnet rotor and the induction rotor, and thus may affect energy conversion of the permanent magnet rotor and the induction rotor.

Through the cooperation of the flow meter 161 and the flow regulating valve 162, when the flow meter 161 detects that the flow of the coolant flowing into the coolant flow channel 111 is greater than a preset value, the flow of the coolant flowing into the mounting cavity 111a can be reduced through the flow regulating valve 162, the permanent magnet rotor and the induction rotor are prevented from being immersed in the coolant, and therefore the energy conversion efficiency of the permanent magnet rotor and the induction rotor is ensured.

Specifically, the flow control valve 162 may be a stop valve or a pressure control valve with a variable conduction cross section, or a relief valve with a preset pressure relief.

In addition, the coolant flowing into the reservoir 150 through the flow rate adjustment valve 162 can cool the coolant flowing into the reservoir 150 from the mounting cavity 111 a.

When it is necessary to reduce the flow rate into the installation cavity 111a, the temperature of the coolant flowing into the cooler 120 can be reduced by opening the flow regulating valve 162.

Referring to fig. 8, in an embodiment, the closed-loop cooling circulation path 10 further includes a first filter 171, and the first filter 171 is used for removing impurities from the coolant flowing through the coolant flow channel 111.

The first filter 171 can filter out impurities in the coolant, so that the impurities can be reduced from entering between the permanent magnet rotor and the induction rotor, and the induction rotor and the permanent magnet rotor are jammed due to the impurities; at the same time, the first filter 171 can also prevent impurities from clogging the closed-loop cooling circulation path 10.

Specifically, as shown in fig. 8, the first filter 171 is disposed between the infusion pump 131 and the cooler 120. The first filter 171 removes impurities from the coolant flowing into the installation cavity 111a by filtering the coolant flowing into the cooler 120.

It should be appreciated that the first filter 171 may be a physical filter that filters particulate matter (e.g., weld debris, weld slag, etc.). Of course, the first filter 171 may also be a chemical filter that removes encrustable particles.

Further, as shown in fig. 8, the closed-loop cooling circulation path 10 further includes a second filter 172, and the second filter 172 is used for filtering the coolant flowing to the infusion pump 131 to remove impurities.

As shown in fig. 4, the second filter 172 may be two filters, and the two second filters are respectively connected to the first driving branch 141 and the second driving branch 142.

In one embodiment, as shown in fig. 9, the closed cooling circuit path 10 further includes a first stop valve 174, a second stop valve 175, a third stop valve 176, a first diversion branch 172, and a second diversion branch 173.

One end of the first diversion branch 172 and one end of the second diversion branch 173 are both communicated with the infusion pump 131, and the other end of the first diversion branch 172 and the other end of the second diversion branch 173 are communicated with the second inlet 121.

The first stop valve 174 is connected in the first diversion branch 172; the second cut-off valve 175, the first filter 171 and the third cut-off valve 176 are sequentially connected in series in the second diversion branch 173.

Generally, coolant flows from the first filter 171 in the second flow-directing branch 173 into the cooler 120. However, when the first filter 171 is serviced, the coolant may flow from the first flow guiding branch 172 into the cooler 120 by closing the second and third stop valves 175 and 176 and opening the first stop valve 174.

Referring to fig. 10, in an embodiment, the closed cooling circulation path 10 further includes a second pressure gauge 192 and a third pressure gauge 193, and the second pressure gauge 192 and the third pressure gauge 193 respectively detect pressures flowing into the first filter 171 and flowing out of the first filter 171.

The operation of the first filter 171 can be judged by comparing the values of the second pressure gauge 192 and the third pressure gauge 193 when the closed-loop cooling circulation path 10 is operating normally.

The first filter 171 has a volume of impurities accumulated therein, and the impurities cause a difference between a pressure value of the refrigerant flowing into the first filter 171 and a pressure value of the refrigerant flowing out of the first filter 171. And as the volume of impurities increases, the difference increases.

In use, an operator can determine the amount of the accumulated impurities according to the magnitude of the difference, so that the operator can conveniently control the time for replacing and maintaining the first filter 171.

As shown in fig. 10, in an embodiment, the closed-loop cooling circulation path 10 further includes a first thermometer 181 and a second thermometer 182, the first thermometer 181 is used for detecting the temperature of the coolant flowing into the coolant flow channel 111, and the second thermometer 182 is used for detecting the temperature of the coolant flowing out of the coolant flow channel 111.

In use, the first thermometer 181 and the second thermometer 182 can know the heating condition of the induction rotor and the permanent magnet rotor, and the cooling effect of the coolant on the induction rotor and the cooling rotor. In this manner, the operator can adjust the cooling system of the permanent magnet governor based on the readings of the first and second thermometers 181, 182.

It should be noted that the permanent magnet governor mentioned in the foregoing embodiment may be a disk type permanent magnet governor or a cartridge type permanent magnet governor.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (7)

1. A cooling system for a permanent magnet governor, comprising a closed loop cooling circulation path that includes:

the base body is used for mounting the permanent magnet rotor and the induction rotor and is provided with a coolant flow channel;

a cooler in communication with the coolant flow passage; and

a driver for driving the coolant to circulate between the coolant flow passage and the cooler; the driver is an infusion pump and the driver is an infusion pump; the base body is provided with a first flow inlet and a first flow outlet which are communicated with the coolant flow channel; the cooler is provided with a second inlet and a second outlet, the second inlet is communicated with the first outlet, and the second outlet is communicated with the first inlet; two ends of the infusion pump are respectively communicated with the first outflow port and the second inflow port so as to be used for driving the coolant to flow into the second inflow port from the first outflow port; or two ends of the infusion pump are respectively communicated with the second outflow port and the first inflow port so as to be used for driving the coolant to flow into the first inflow port from the second outflow port;

the closed-loop cooling circulation path further comprises a first driving branch and a second driving branch, one end of the first driving branch and one end of the second driving branch are both communicated with the first outflow port, and the other end of the first driving branch and the other end of the second driving branch are communicated with the second inflow port;

the infusion pump comprises a first infusion pump and a second infusion pump, the first infusion pump is connected to the first driving branch, and the second infusion pump is connected to the second driving branch.

2. The cooling system of the permanent magnet governor of claim 1, wherein the closed cooling circulation path further includes a reservoir having two ends in communication with the first and second fluid outlets, respectively; or the two ends of the liquid storage tank are respectively communicated with the second flow outlet and the first flow inlet.

3. The cooling system of the permanent magnet governor of claim 2, wherein the base body is provided with a mounting cavity for mounting the permanent magnet rotor and the induction rotor, and an inner wall of the mounting cavity encloses the coolant flow passage.

4. The cooling system of the permanent magnet governor of claim 2, wherein the closed cooling circulation path further includes a flow meter and a flow regulating valve;

the flow meter is used for detecting the flow of the coolant flowing into the coolant flow channel;

one end of the flow regulating valve is communicated with the second outflow port, and the other end of the flow regulating valve is communicated with the liquid storage tank; the flow regulating valve is used for regulating and controlling the flow of the coolant flowing into the first inlet.

5. The cooling system of the permanent magnet governor of claim 1, wherein the closed loop cooling circulation path further includes a first filter for decontaminating the coolant flowing to the coolant flow path.

6. The cooling system of the permanent magnet governor of claim 5, wherein the closed cooling circulation path further includes a first shut-off valve, a second shut-off valve, a third shut-off valve, a first diversion branch, and a second diversion branch;

one end of the first flow guide branch and one end of the second flow guide branch are both communicated with the driver, and the other end of the first flow guide branch and the other end of the second flow guide branch are communicated with the second flow inlet;

the first stop valve is connected to the first diversion branch;

the second stop valve, the first filter and the third stop valve are sequentially connected in series in the second flow guide branch.

7. The cooling system of the permanent magnet governor of any of claims 1-6, wherein the closed loop cooling circulation path further includes a first temperature gauge for sensing a temperature of the coolant flowing into the coolant flow passage and a second temperature gauge for sensing a temperature of the coolant flowing out of the coolant flow passage.

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