CN102102938B - Gear motor for freezer - Google Patents
Gear motor for freezer Download PDFInfo
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- CN102102938B CN102102938B CN2010105997390A CN201010599739A CN102102938B CN 102102938 B CN102102938 B CN 102102938B CN 2010105997390 A CN2010105997390 A CN 2010105997390A CN 201010599739 A CN201010599739 A CN 201010599739A CN 102102938 B CN102102938 B CN 102102938B
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- Prior art keywords
- oil sealing
- gear motor
- temperature
- freezer
- low temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
- F25D2700/122—Sensors measuring the inside temperature of freezer compartments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Sealing Of Bearings (AREA)
- Motor Or Generator Frames (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Gear Transmission (AREA)
- General Details Of Gearings (AREA)
Abstract
The present invention provides a gear motor for a freezer, which can operator in the freezer without warming operation and furthermore has the advantages of low cost and long service life. In the motor and an integrated gear motor (10) used in the freezer, when a target freezing temperature is -T DEG C (such as -30 DEG C), an ultra-low temperature oil seal (30) used in -(T+10) DEG C (namely -40 DEG C if the target freezing temperature is -30 DEG C) is inserted into a speed reducer (14) as the oil seal for sealing the speed reducer. The gear motor (10) operates intermittently thereby preventing a fact that the temperature near the ultra-low temperature oil seal (30) exceeds 0 DEG C.
Description
The application advocates the Japanese patent application 2009-286880 priority based on application on December 17th, 2009.The full content of its application is applied in this specification through reference.
Technical field
The present invention relates to a kind of freezer that in freezer, uses and use gear motor.
Background technology
Because the inside of the freezer of keeping fresh food etc. is set to utmost point low temperature, need guarantee the good operation as the gear motor of its drive source with some form so be arranged on this freezer inner storage rack or transfer station movably.In addition, comprise in " gear motor " of the present invention from the design phase just directly integrative motor and reductor gear motor, and use incorporate afterwards gear motor such as connector both.
In patent documentation 1, be provided at the attemperator that holds gear motor in the incubator that has heating arrangements.In this attemperator,, then make heating arrangements work if the temperature in the incubator drops to the expectant control temperature.
Patent documentation 1: TOHKEMY 2005-300085 communique
But, possess mechanism, except gear motor also needs incubator and heating control apparatus in addition like above-mentioned attemperator.And, if attemperator is started when not using gear motor for a long time, and whenever gear motor can both be used at once, then need waste a large amount of electric power.Certainly, when clearly not using gear motor for a long time, the power supply of attemperator is cut off at any time.But also exist following problem this moment: when using gear motor, do not pass through attemperator heating gear motor, and lubricating grease etc. becomes and can bring into play after the function well if do not wait until heating arrangements at every turn, and just can't entry into service itself.
Therefore, can consider to utilize to be developed to use to the more lubricant and the oil sealing (for example, acrylic rubber or hydrogenated nitrile-butadiene rubber) of low temperature the gear motor that design also can directly be used in freezer.But; Confirmed in fact to produce following problem points: running is used as can use the gear motor of the lubricant developed to the low temperature of the target temperature of this freezer and oil sealing the time in freezer, and (though running itself can accessiblely be carried out really) has from the situation of oil sealing portion leakage of lubricant once in a while.
Yet, even manufacturer will produce the gear motor of this problem Detailed Inspection oil sealing etc. of taking home, also originally can not find special unusually sometimes on one's body at oil sealing, actual conditions are exactly that its reason may not be necessarily clearly.
Summary of the invention
The present invention is based on accomplishing through the former of this leakage of oil of detailed survey thereby the opinion that obtains under this situation; Its problem is; Attemperator and heating arrangements etc. need not be set and can be in freezer directly in the engaged gear motor; Prevent the leakage of lubricant, and keep the life-span of oil sealing than the highland.
The present invention solves above-mentioned problem through being made as following structure; In the incorporate gear motor of motor that in making freezer, turns round and reductor, can be sealed to the utmost point low temperature that is lower than the temperature of target cryogenic temperature more than at least 10 ℃ inserts the rotating shaft of the said reductor of conduct sealing in this reductor with oil sealing oil sealing.
The result of the characteristic of the oil sealing of the gear motor that detailed survey of the present invention uses in freezer; In order under the situation that does not have attemperator or warm-operation, in freezer, to use gear motor; The target cryogenic temperature for for example be-during T ℃, use to have ratio-(T+10) utmost point low temperature of ℃ also low sealing property is with the oil sealing of oil sealing as the rotating shaft (power shaft or output shaft) that seals reductor.In a word, use if the target cryogenic temperature is used oil sealing for-30 ℃ of utmost point low temperature that then guarantee use below-40 ℃.
In view of the above, can in freezer, directly use gear motor, and can prevent to produce leakage of oil.For the relevant concrete reason that prevents this leakage of oil, be elaborated in the back.
In addition; Can also grasp as follows: the present invention is a kind of motor and incorporate gear motor of reductor that in freezer, uses that make; It is characterized in that possessing the oil sealing of rotating shaft of the said reductor of sealing, this oil sealing becomes and can be sealed to the utmost point low temperature that is lower than the temperature of target cryogenic temperature more than at least 10 ℃ and use oil sealing; And this gear motor is by intermittent running, so as not to this utmost point low temperature with the temperature of oil sealing periphery above 0 ℃.
In addition; Can also grasp as follows, the present invention is a kind of motor and incorporate gear motor of reductor that in freezer, uses that make, and it is characterized in that; The oil sealing that possesses the rotating shaft of the said reductor of sealing; This oil sealing becomes and can be sealed to the utmost point low temperature that is lower than the temperature of target cryogenic temperature more than at least 10 ℃ and use oil sealing, and this gear motor is by intermittent running; In order to avoid surpass the scheduled time, this scheduled time is configured to shorter above 0 ℃ time with the temperature of oil sealing periphery than this utmost point low temperature of prediction.
The effect of invention:
According to the present invention, realization can in freezer in the direct engaged gear motor, can effectively prevent the leakage of lubricant.
Description of drawings
Fig. 1 is that expression is applied to the cutaway view of the freezer of the related method of operation of embodiment of the present invention with an example of gear motor.
Fig. 2 is the amplification view of oil sealing of the input side of the gear motor used of above-mentioned freezer.
Fig. 3 is the chart and the enlarged drawing thereof of the humid test example of oil sealing periphery.
Fig. 4 is the flow chart of an example of the running control of expression said gear motor.
Fig. 5 is other the flow chart of an example of running control of expression said gear motor.
Among the figure: the 10-freezer is used gear motor, the 12-motor, and the 14-reductor, 30,36-utmost point low temperature uses oil sealing, 32-normal temperature is used oil sealing, the 40-temperature sensor.
The specific embodiment
Below, be elaborated according to the example of accompanying drawing to embodiment of the present invention.
At first, before the explanation that gets into specific embodiment example, the solution principle of problem of the present invention is elaborated.
For example, well-known, acrylic rubber is the material of low temperature seal excellent performance.This material is in product description, owing to also see and can use to-25 ℃ of such records, inventor's oil sealing that this material is related of trying at first uses the oil sealing of gear motor to adopt in-25 ℃ the freezer in the target cryogenic temperature as freezer.But actual conditions are to produce lubricant sometimes to leak.
The result of detailed survey has inferred following content: when wanting in freezer, to make its performance function, hardness arranged in that start of run is residual, therefore can't follow trickle the rocking or vibrate of axle well.This is to check at normal temperatures that from gear motor is taken home oil sealing etc. does not find that the unusual especially fact is counter to be released yet.Can think that fastening force reduces owing at start of run, lack flexibility.This point can be described as the unique circumstances of the freezer different with simple O type packing ring etc. with gear motor, and can think especially becomes problem easily in the oil sealing of the rotating shaft of the power shaft of rotation at a high speed etc.
Therefore; Attempt having the utmost point low temperature of more excellent low-temperature characteristics and used oil sealing; Promptly in the target cryogenic temperature be-during T ℃; With oil sealing (for example being acrylonitrile-butadiene rubber particularly), the result obtains good result, proves that supposition is correct at the utmost point low temperature of-low temperature seal excellent performance that also can be corresponding below (T+10) ℃.
The present invention is based on this opinion and accomplishes.
In addition, even when the oil sealing of newly having confirmed this more utmost point low temperature is used uses with the oil sealing of gear motor as freezer, also there is lubricant to leak through long-term use.
In the stage of groping countermeasure, infer that the influence of rising as one of reason temperature is big.The temperature (target cryogenic temperature) that Fig. 3 is illustrated in the freezer is in-25 ℃ the freezer, and the rotating speed of motor (input shaft rotational speed of reductor) is measured the experimental example of the state of the peripheral temperature rising of oil sealing when being 1800rpm.Can know from this experimental example, can confirm following content, when the temperature in freezer is-25 ℃; The temperature of oil sealing periphery about about 10 minutes in running beginning back; Amplitude with greater than normal temperature time the (actual mensuration result is about 1.3 times) rises near 0 ℃ quickly, surpasses 0 ℃ through 10 a few minutes, afterwards; Rising becomes steadily, if through just becoming roughly certain more than 40 minutes.
This result representes, if carry out repeatedly after the running beginning is continuously more than 10 a few minutes of running, stopping, then the oil sealing periphery is at 0 ℃ border commute.This may be thought of as by this running and about 0 ℃ the temperature rising that stops to cause and descends and causes condensation trouble.
But; Particularly when gear motor is newly imported or when maintenance etc., make an experiment the running back at normal temperatures when the outside of freezer is brought in the freezer, perhaps as storage rack or transfer station temporarily go out freezer door outward then during the freezer of reentrant structure; Can think that extraneous air (air that contains moisture) is easy in gear motor is brought into freezer; Its result, oil sealing periphery dewfall becomes and solidifies repeatedly and melt.
Therefore, gear motor involved in the present invention, with this viewpoint be set as guarantee when being inserted in the target cryogenic temperature at least for-T ℃-(T+10) ℃ utmost point low temperature that uses is down used oil sealing.And, preferably further be made as gear motor by intermittent running, in order to avoid the temperature of this oil sealing periphery is above 0 ℃.Perhaps be made as following gear motor: gear motor is by intermittent running, in order to avoid surpass the scheduled time of setting above 0 ℃ time with the temperature of oil sealing periphery than this utmost point low temperature of prediction shortlyer.Thus, utmost point low temperature disappears with " phase change " of the moisture of oil sealing periphery, prevents to carry out dewfall repeatedly, solidify, melt, and the environment for use of gear motor is highly stable.
In addition, manage the humidity of keeping freezer than the lowland, or to take measures to make dewfall unquestioned structure in oil sealing also be effective.
Below, utilize Fig. 1, Fig. 2 that the example of embodiment is more specifically described.
Fig. 1 is the cutaway view of the related freezer of an example of embodiment of the present invention with gear motor.In addition, in this example, the target cryogenic temperature of freezer (omitting diagram) is-25 ℃.
This freezer uses gear motor 10 for making motor 12 and reductor 14 incorporate motor.In addition; Like this embodiment; When being called " gear motor "; Usually instigate the incorporate motor of motor 12 and reductor 14 (from the stage of design), but gear motor involved in the present invention for example also can be to make the motor of independent design and reductor pass through connector or the incorporate motor of binder bolt more.When not wanting that (for example in the connector) spills oil condition etc. outside reductor, can use the present invention equally.
Reductor 4 possesses the power shaft (rotating shaft) 16 of the motor reel dual-purpose of motor 12, on this power shaft 16 integrally formed hypoid pinion 18 and with the hypoid gear 20 of these hypoid pinion 18 engagements.This hypoid gear 20 is inserted in jackshaft 22, is integrally formed at middle bevel pinion 24 and output gear 26 engagements on this jackshaft 22.And the rotation of output gear 26 exports the outside to as the rotation of hollow type output shaft (rotating shaft) 27.
This freezer possesses the power shaft 16 of sealing reductor 14 and the oil sealing of output shaft 27 with gear motor 10.This oil sealing become can be sealed to be lower than the temperature of target cryogenic temperature more than at least 10 ℃ utmost point low temperature with oil sealing 30, and this gear motor 10 is by running off and on, so as not to this utmost point low temperature with oil sealing 30 peripheral temperature above 0 ℃.
As explain in more detail, then the input side of reductor 14 through with the bearing of power shaft 16 28 in abutting connection with (embodiment of the present invention is related) utmost point low temperature of configuration with oil sealing 30, and at this utmost point low temperature (the removal dust is used) normal temperature of insertion is airtight with oil sealing 32 side by side with the reductor private side of oil sealing 30.And the outlet side of reductor 14 seals with oil sealing 36 in abutting connection with (embodiment of the present invention the is related) utmost point low temperature that disposes through the bearing 34 with output shaft 27.Though the utmost point low temperature of this outlet side is different with oil sealing 36 diameters, structurally be with the utmost point low temperature of input side with the identical structure of oil sealing 30.Therefore, explanation for ease, the utmost point low temperature that is conceived to input side describes with oil sealing 30.
Utmost point low temperature is formed by acrylonitrile-butadiene rubber with oil sealing 30.Acrylonitrile-butadiene rubber has for target cryogenic temperature-25 ℃ too fully (can fully be sealed to than target cryogenic temperature-25 ℃ low-40 ℃ (following) more than 10 ℃) low temperature seal characteristic.And, owing to have the patience of the oil of mineral oil system, also have wearability, therefore be fit to the purposes of freezer with gear motor.In fact, even the no warm-operation and begin direct running in freezer of this acrylonitrile-butadiene rubber does not produce initial stage hardness problem yet.In addition, except acrylonitrile-butadiene rubber, silicon rubber, EP rubbers, butadiene-styrene rubber, TFE, and fabric etc. also have good low-temperature characteristics with the oil sealing material as utmost point low temperature of the present invention.Wherein, because silicon rubber also has better heat-resisting property, therefore also can be effectively corresponding for this point that outside freezer, turns round sometimes, also be preferred in this.
Shown in amplifying at Fig. 2, utmost point low temperature is that (though material itself is expensive) is the simple structure that main body has with main lip 30A with oil sealing 30, can seek low cost.On the other hand, under the situation of the gear motor 10 that can confirm in freezer, to turn round, (particularly when the importing of gear motor 10 or when maintenance when making an experiment running at normal temperatures, its tendency is big to be easy to generate the problem of the dust of wearing and tearing powder etc.The generation of this dust; The possibility that further reduces through related (maintain less than the 0 ℃) running of this embodiment is high; But in this embodiment; Since this utmost point low temperature with the reducing gear private side of oil sealing 30 further insert side by side remove dust normal temperature with oil sealing 32, so strengthened dust eliminating function more.
As its name suggests, this normal temperature used with oil sealing 32 originally at normal temperatures, except main lip 32A, had set up dust lip 32B.This normal temperature is carrying out (this freezing with gear motor in inevitably) cold test running when importing with oil sealing 32; Or during the inspection of the normal temperature when outside freezer, safeguarding running etc.; When bringing into play function, protect utmost point low temperature with oil sealing 30 reliably from dust such as wearing and tearing powder as so-called oil sealing.On the other hand, when the common utmost point low temperature in freezer turned round, though absorb a large amount of dust at this, the function because hardness uprises as oil sealing reduced.Therefore and establish 2 oil sealings but because the slip loss increases the amount corresponding with it hardly, even, also possessing can be than highland keep on the go efficient and few (especially as far as this embodiment) the good characteristic of caloric value.
The gear motor 10 that this freezer is used is by intermittent running, so as not to utmost point low temperature with the temperature of oil sealing 30 peripheries above 0 ℃.Do not limit especially for this concrete running control, but in this embodiment, be inserted with the temperature sensor 40 that constitutes by thermocouple near with oil sealing 30, can detect utmost point low temperature with the peripheral temperature of oil sealing 30 at utmost point low temperature.
In addition, in this embodiment, do not insert temperature sensor at the utmost point low temperature of outlet side in oil sealing 36 and sought the cost reduction.This is because be appreciated that to the utmost point low temperature of outlet side is lower than the temperature of the utmost point low temperature of input side with oil sealing 30 all the time with the temperature (because the rotating speed of output shaft 27 is slow) of oil sealing 36, just is enough to so need only the supervision input side.
An example of below controlling for running.This freezer for example carries out according to flow chart as shown in Figure 4 with the running of gear motor 10.
If in step S2, make the power supply of gear motor 10 become ON, then in step S4, detect the temperature of utmost point low temperature with oil sealing 30 peripheries through the temperature sensor 40 that constitutes by thermocouple.Judge in step S6 whether this temperature is higher than from 0 ℃ some leeway and estimate at interior-4 ℃.When being judged as below-4 ℃, because the worry that the dewfall of not solidifying is melted, so get back to the running that step S4 continues temperature monitoring and gear motor 10 same as before.But; In step S6, being judged as utmost point low temperature becomes when being higher than-4 ℃ with the temperature of oil sealing 30 periphery; Get into step S8 and give a warning according to not shown lamp etc., (when not having the operator to carry out the dump operation) confirmed further in step S10 whether temperature becomes and is higher than-2 ℃.If judge that it be below-2 ℃ that utmost point low temperature uses the temperature of oil sealing 30 peripheries, the later step of the temperature monitoring of repeating step S4 once more then if judgement becomes and is higher than-2 ℃ in step S10, then gets into step S12 and cuts off the electricity supply.During this period, the operator gets into step S12 at any time and gear motor 10 is stopped when manually carrying out the shut-down operation of gear motor 10 running, restarts flow process with next power source ON from step S2.
Thus, be below-2 ℃ the time when utmost point low temperature uses the temperature of oil sealing 30 peripheries, can directly proceed running, but judge that utmost point low temperature becomes when being higher than-2 ℃ with oil sealing 30 peripheral temperature, ends to turn round at this constantly.Thereby; Each oil sealing 30,32,36 in the gear motor 10 maintains below freezing reliably; The dewfall of solidifying can not melted (certainly not dewfall) more yet, and each oil sealing 30,32,36 can be kept excellent sealing performance, life-saving greatly all the time under stable environment.
In addition; In this example except the warning with the threshold value (4 ℃); Also be set as to have and be higher than warning a little with threshold value and be lower than 0 ℃ dump, but threshold value also can be merely 1 (not warning), and also can make timer work replace the 2nd time threshold value setting with threshold value (2 ℃).Threshold value itself also is not limited to above-mentioned-4 ℃ ,-2 ℃.
In addition, even consider that sacrificing some life-spans sometimes also thinks emergency operation, also can make above-mentioned control (being the related method of operation of this embodiment) manually carry out the OFF operation.
In addition, in the present invention importantly, this gear motor 10 is by intermittent running, in order to avoid utmost point low temperature surpasses 0 ℃ with oil sealing 30 peripheral temperature, and temperature sensor 40 is not necessarily necessary condition.For example, gear motor 10 also can be following structure: running off and on, in order to avoid surpass the scheduled time of setting above 0 ℃ time with the temperature of oil sealing periphery than this utmost point low temperature of prediction shortlyer.
Fig. 5 representes an example of the running control that this structure example is related.
In this running control, directly do not detect each utmost point low temperature with near the temperature the oil sealing 30, but infer the temperature of utmost point low temperature in the running indirectly, protect each oil sealing 30,32,36 thus with oil sealing 30.Thereby, rely in the time of should turning round control, do not need the said temperature sensor 40 of gear motor 10.
If make power supply become ON among the step S20, whether the 3rd timer t3 of starting (resetting the counting beginning) is through (step S22) more than 5 minutes among the step S32 that states after then judging when last once power supply OFF.When through more than 5 minutes the time, directly get into step S24 and in fact power supply becomes ON, but during also not through 5 minutes, got into step S24 again through 5 minutes by the time, become ON for the first time at this moment power supply.In step S24, start the 1st timer t1 (resetting the beginning of & counting) simultaneously with power source ON.
Afterwards, in step S26, judge whether the 1st timer (being continuous operation time) t1 surpasses (utmost point low temperature does not reach 0 ℃ with the temperature of the oil sealing 30 peripheries) scheduled time, for example 8 minutes.Begin from power source ON, i.e. after the gear motor 10 actual entrys into service to as yet not through during 8 minutes, touring step S26 remains in operation same as before.
But, surpass 8 minutes if judge the 1st timer t1, then get into step S28 and give a warning starting (resetting the beginning of & counting) the 2nd timer t2 by not shown lamp etc.And, if judge that in step S30 starting the 2nd timer t2 afterwards through 2 minutes, then cuts off the electricity supply in step S32, starting simultaneously (resetting the beginning of & counting) the 3rd timer t3.The 3rd timer t3 is in power source ON when operation (abovementioned steps S20) of carrying out next time, is utilized in order to ensure in fact become 5 minutes the interval (during forbidding rerunning) till the ON to power supply (abovementioned steps S22).Through the function of the 3rd timer t3, even when just continuously the power supply of gear motor 10 becomes ON after the running, as a result of also can prevent reliably to reach more than 0 ℃.
In addition, (being 5 minutes in this example) also can be according to suitably changes such as the peripheral exothermic character of the oil sealing of gear motor 10, environment temperatures (target cryogenic temperature) during this forbade rerunning.And it is further preferred according to just the time of running is carried out variable setting continuously.Certainly, when previous continuous operation time more in short-term, can be shorter during forbidding rerunning.Thus can be in the frequency that reduce to cut off, carry out more reliably less than the running under 0 ℃.
In this embodiment; The threshold value of the 1st timer t1 is set 8 minutes for; The threshold value of the 2nd timer t2 is set 2 minutes for; This is because following reason: according to aforesaid experiment infer continuous operation time be below 10 minutes during, in this freezer each oil sealing 30,32,36 less than 0 ℃, thereby think that the dewfall of solidifying can not melt.The threshold value of the 1st timer t1 can be according to the target temperature of actual freezer, or the caloric value of the oil sealing of gear motor periphery etc. is suitably set.By the way, except the related freezer of this embodiment, as long as in 10 minutes, the situation that probably is no more than 0 ℃ is more.
The present invention has narrated necessarily physics observed temperature, but also may not necessarily be employed in through automatically the power supply of gear motor being made as the structure of OFF on the basis of timer practical measurement continuous operation time.Promptly; For example also can be following structure: (even not having the state of special timer structure etc.) operator consider continuous operation time consciously and forbid rerunning during the basis on the control gear motor that turns round off and on, in order to avoid continuous operation time was above 10 minutes.Even this structure also can obtain following freezer and use gear motor, can effectively prevent leakage of oil, can significantly improve (oil sealing) life-span again, cost is suppressed at the minimal while, can in freezer, directly use.
Claims (4)
1. a freezer is used gear motor, makes the motor and the reductor that in freezer, use integrated, it is characterized in that,
The oil sealing that possesses the rotating shaft of the said reductor of sealing,
This oil sealing becomes and can be sealed to the utmost point low temperature that is lower than the temperature of target cryogenic temperature more than at least 10 ℃ and use oil sealing, and,
This gear motor is by intermittent running, so as not to this utmost point low temperature with the temperature of oil sealing periphery above 0 ℃.
2. a freezer is used gear motor, makes the motor and the reductor that in freezer, use integrated, it is characterized in that,
The oil sealing that possesses the rotating shaft of the said reductor of sealing,
This oil sealing become can be sealed to be lower than the target cryogenic temperature more than at least 10 ℃ the utmost point low temperature of temperature use oil sealing, and,
This gear motor is by intermittent running, in order to avoid surpass the scheduled time, this scheduled time is configured to shorter above 0 ℃ time with the temperature of oil sealing periphery than this utmost point low temperature of prediction.
3. freezer as claimed in claim 2 is used gear motor, it is characterized in that,
The said scheduled time was set at below 10 minutes.
4. use gear motor like each described freezer in the claim 1 to 3, it is characterized in that,
Said utmost point low temperature is selected from acrylonitrile-butadiene rubber, silicon rubber, EP rubbers, butadiene-styrene rubber, TFE, reaches fabric with oil sealing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP286880/2009 | 2009-12-17 | ||
| JP2009286880A JP5461166B2 (en) | 2009-12-17 | 2009-12-17 | Gear motor for freezer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102102938A CN102102938A (en) | 2011-06-22 |
| CN102102938B true CN102102938B (en) | 2012-11-14 |
Family
ID=44155879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105997390A Active CN102102938B (en) | 2009-12-17 | 2010-12-17 | Gear motor for freezer |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5461166B2 (en) |
| KR (1) | KR101211479B1 (en) |
| CN (1) | CN102102938B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5731435B2 (en) * | 2012-03-30 | 2015-06-10 | 住友重機械工業株式会社 | Reducer for refrigerated warehouse |
| CN107863847B (en) * | 2017-11-29 | 2023-07-18 | 深圳市优必选科技有限公司 | Steering engine device and cradle head equipment with same |
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| JPH0413475Y2 (en) * | 1987-02-02 | 1992-03-30 | ||
| JPH0752057B2 (en) * | 1990-07-17 | 1995-06-05 | 株式会社荏原製作所 | Container transfer cooling device |
| KR100396015B1 (en) * | 1996-08-16 | 2003-11-01 | 니찌아스 카부시키카이샤 | Vulcanized rubber composition |
| JP2994350B2 (en) * | 1998-08-20 | 1999-12-27 | 株式会社大同工業所 | Pull-in mechanism of metal tube into explosion-proof container in explosion-proof refrigeration / refrigeration equipment |
| CN2430300Y (en) * | 2000-01-25 | 2001-05-16 | 徐益淼 | Oil seal |
| CN2428740Y (en) * | 2000-06-01 | 2001-05-02 | 南通冷冻设备厂 | two-section conveyor belt fluidized quick-freezing device |
| JP4331989B2 (en) * | 2003-07-24 | 2009-09-16 | 三菱電機株式会社 | Geared motor |
| JP4438491B2 (en) * | 2004-04-15 | 2010-03-24 | 株式会社Ｉｈｉ | Thermal insulation device |
| JP2006266530A (en) * | 2005-03-22 | 2006-10-05 | Taiyo Nippon Sanso Corp | Airtight structure of low-temperature device |
| JP2006280057A (en) * | 2005-03-28 | 2006-10-12 | Seiko Epson Corp | Motor control method and motor controller |
| CN100393796C (en) * | 2006-01-20 | 2008-06-11 | 山东莱阳市昌誉密封产品有限公司 | Polytetrafluoroethylene oil seals and production thereof |
-
2009
- 2009-12-17 JP JP2009286880A patent/JP5461166B2/en active Active
-
2010
- 2010-12-14 KR KR1020100127307A patent/KR101211479B1/en active IP Right Grant
- 2010-12-17 CN CN2010105997390A patent/CN102102938B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP5461166B2 (en) | 2014-04-02 |
| JP2011130590A (en) | 2011-06-30 |
| KR101211479B1 (en) | 2012-12-12 |
| CN102102938A (en) | 2011-06-22 |
| KR20110069715A (en) | 2011-06-23 |
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