CN102537280A - Driving pulley for refrigeration equipment - Google Patents
Driving pulley for refrigeration equipment Download PDFInfo
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- CN102537280A CN102537280A CN2012100406393A CN201210040639A CN102537280A CN 102537280 A CN102537280 A CN 102537280A CN 2012100406393 A CN2012100406393 A CN 2012100406393A CN 201210040639 A CN201210040639 A CN 201210040639A CN 102537280 A CN102537280 A CN 102537280A
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- China
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- pulley
- belt pulley
- refrigeration equipment
- compressor
- diameter
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Abstract
The invention discloses a driving pulley for refrigeration equipment. The diameter D of the pulley is 300 to 333mm, the groove number Z of the pulley is 2, the diameter of a shaft hole of the pulley is 25.4mm, and the conical degree is 2 deg 51 arc min 44 arc sec. The pulley is made of an HT 250 material, is molded by machining after a blank is cast, is used for dynamic balance with the standard of 0.2g and has an integral weight range of 8.2 to 8.4kg. The driving pulley has a simple structure and an ingenious design, can be applied to a transmission pulley for ship refrigeration equipment which uses R22 as a refrigerant, can save a large quantity of funds and cost for users and has an extremely remarkable economic benefit.
Description
Technical field
The present invention relates to a kind of belt pulley, particularly a kind of refrigerating equipment is used transmission pulley.
Background technique
The most of freon refrigerant that uses of marine refrigerating plant.Because part freon can diffuse in the overhead stratosphere of the earth, cause ozone to decompose, thereby damage the ozone layer, the deterioration of aggravation ball ecological environment threatens the existence that comprises human tellurian.China announced the participation Montreal Protocol on Substances that Deplete the Ozone Layer in 1991; And promise to undertake that containing the R12 freon refrigerant will completely forbid in 2010 at interior CFCs class material, contain R22 and will completely forbid in the year two thousand forty at the material of interior HCFCs class.
Because historical reasons, it is the demand of R22 refrigeration agent that some old civil and military boats and ships still exist the R12 refrigerant replacing, to meet Montreal protocol uses freon refrigerant to developing country's restriction time requirement.
Marine refrigerating plant generally is made up of compressor, condenser, liquid-storage container, heat exchanger, heating power expansion valve, solenoid valve, temperature relay, high-low voltage relay, electric control box and pipe-line system; Refrigeration agent through compressor compresses, boost, cool off; Enter into system,, flow into evaporation heat absorption in the vaporizer through heating power expansion valve throttling step-down; Return the compressor air suction mouth, accomplish refrigeration cycle.Adopt the old-fashioned jzs-2F6.5 Piston Refrigerant Compreessor group peculiar to vessel of R12 refrigeration agent, adopt belt transmission, motor speed 1440rpm, power of motor 4Kw, compressor rotary speed 850rpm, unit refrigerating capacity 4000kcal/h.The R22 refrigeration agent is used in replacement, needs to reduce compressor rotary speed, and the belt pulley that has disposed can't be realized the rotating speed that this is lower, therefore needs a kind of belt pulley that can be applicable to R22 refrigeration agent Piston Refrigerant Compreessor group now.
Summary of the invention
The present invention is in order to solve the above-mentioned deficiency of existing in prior technology, proposes a kind of simple in structurely, designs ingeniously, can be applicable to R22 to be that the marine refrigeration equipment of refrigeration agent is used transmission pulley.
Technical solution of the present invention is: the diameter D=300-333mm of said belt pulley, and pulley groove is counted Z=2, and the Pulley shaft bore dia is 25.4mm; Tapering is 2 ° 51 ' 44 "; this belt pulley selects for use the HT250 material to process, be cast as blank after, adopt the machining moulding; and be the dynamic balancing of 0.2g as standard, belt pulley overall weight scope is 8.2-8.4kg.
The present invention compares with existing technology, has following advantage:
The belt pulley of this kind of structural type and specification; It is simple in structure, designs ingeniously, and it still uses the R12 refrigeration agent to some old civil and military boats and ships; Need when being replaced with the R22 refrigeration agent, have the actual demand of the facility that matches with it; Design and meet the belt pulley of using with as the refrigerating equipment of R22 refrigeration agent, this belt pulley can satisfy job requirement fully, under full operating mode; Stable the remaining on below the rating value of operating current ability of motor, its structural parameter and intensity are reasonable, suitable.The appearance of this special belt pulley; Solved the critical problem of refrigeration plant repacking; Avoided the significant cost that produces because of the inapplicable cooling machine set that must more renew of belt pulley, with every 50,000 yuan of calculating of the semiclosed marine chillers group about present 4Kw, removed old unit, reinstall material cost and 50,000 yuan of calculating of cost of labour that pedestal, connecting pipeline, layout electric control box and the circuit of unit need; Only this item is the client and saves nearly 100,000 yuan of repacking cost.Therefore we can say that it has possessed applicability and huge economic benefit preferably, its market prospects are very wide.
Description of drawings
Fig. 1 is the plan view of the embodiment of the invention.
Fig. 2 is the left view of the embodiment of the invention.
Embodiment
Below with accompanying drawings embodiment of the present invention.As shown in Figure 1:
The compressor operation CALCULATION OF PARAMETERS:
The theoretical displacement V of former machine set compressor
H12
V
h12= 
Q
O12-original system refrigerating capacity, 4000 kcal/h
q
ν 12-R12 refrigerating effect per unit swept volume, 304
λ
12The defeated vapour coefficient of-R12 compressor, 0.62.
Calculate then after refrigeration agent replaces with R22, keeping under the constant prerequisite of refrigerating capacity the defeated vapour amount V of the theory that compressor is new
H22
V
h22= 
Q
O22The refrigerating capacity of system behind the-replacement refrigeration agent is with former to need refrigerating capacity to equate be 4000 kcal/h
q
ν 22-R22 refrigerating effect per unit swept volume, 494
λ
22The defeated vapour coefficient of-R22 compressor is at condensing temperature t
kBeing 35 ℃, when evaporating temperature is-15～-20 ℃, is 0.63～0.7.
System compresses machine rotation speed n behind the calculating replacement refrigeration agent
2
n
2＝
D-compressor piston diameter, 67.5mm
S-compressor piston stroke, 50mm
Z-compressor cylinder number is 2
Calculate the speed range n of compressor according to following formula
2At 540～600rpm.
According to the data that aforementioned calculation draws, carry out the design of belt pulley.
At first need confirm the diameter D of belt pulley:
Known belt pulley transmission exists
=
Relation, n wherein
1(motor speed) is: 1440rpm, d (motor side diameter pulley) is: 125mm, n
2(compressor rotary speed) is: 540-600rpm, D are required definite diameter pulley,
Span through calculating D is: 300-333mm.
Because the unit of required repacking is the old unit that has used certain time limit, therefore take into full account design redundancy and installing space, D value 300mm.
Secondly the groove that needs to confirm belt pulley is counted Z:
Motor side belt pulley d is 125mm, and driven wheel D is 300mm, and drivign belt adopts the Type B vee belt of standard, and distance between shafts a is 600mm, motor speed 1440rpm, compressor rotary speed 600rpm.
According to mechanical design handbook
Design power P
d=K
AP, P is power of motor 4Kw, K tables look-up
ABe 1.1, P
d=1.1 * 4=4.4 (Kw)
Belt speed v =
=
= 9.42 (m / s)
Transmission ratio i =
=
= 2.4
Belt Length l=
=1803mm
Small pulley wrap angle α1 = 180 ° -
× 57.3 = 180 -
× 57.3 = 163.28 °
Rated power increment △ P
1Tabling look-up is 0.46 Kw
Drivign belt radical z=
According to small pulley d=125mm, n
1=1440rpm, Type B band P tables look-up
1=2.2 Kw, Ka=0.96, Kl=0.95
z=
=1.81
Can know that through aforementioned calculation 2 belts promptly can satisfy the transmission power requirement, so the groove of belt pulley is counted Z and is confirmed as two.
Confirm the structure and the size of belt pulley at last.
This case compressor axle head is taper, and the axis hole of belt pulley is that φ 25.4, tapering are 2 ° 51 ' 44 ".
Design result is as shown in Figure 1.The belt wheel structural type adopts the orifice plate pattern, and material is selected HT250 for use.After being cast as blank, adopt the machining moulding.Product after the moulding is done dynamic balancing after machining, standard is 0.2g; Gross weight after the belt pulley of this structure and size machines is between 8.2-8.4kg; And the gross weight of former belt pulley is about 8.0kg; Promptly with near the weight of former belt pulley it being replaced, as far as possible little reduction is to the influence of other refrigeration systems of not making change.
Claims (1)
1. a refrigerating equipment is used transmission pulley, it is characterized in that:
The diameter D=300-333mm of said belt pulley, pulley groove is counted Z=2, and the Pulley shaft bore dia is 25.4mm; Tapering is 2 ° 51 ' 44 "; this belt pulley selects for use the HT250 material to process, be cast as blank after, adopt the machining moulding; and be the dynamic balancing of 0.2g as standard, belt pulley overall weight scope is 8.2-8.4kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100406393A CN102537280A (en) | 2012-02-22 | 2012-02-22 | Driving pulley for refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100406393A CN102537280A (en) | 2012-02-22 | 2012-02-22 | Driving pulley for refrigeration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102537280A true CN102537280A (en) | 2012-07-04 |
Family
ID=46344946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100406393A Pending CN102537280A (en) | 2012-02-22 | 2012-02-22 | Driving pulley for refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102537280A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201180776Y (en) * | 2008-04-11 | 2009-01-14 | 仇高岱 | Combined belt pulley |
| JP2009127645A (en) * | 2007-11-20 | 2009-06-11 | F C C:Kk | Pulley for driving force transmission |
| CN201496516U (en) * | 2009-09-07 | 2010-06-02 | 中国石油化工股份有限公司胜利油田分公司孤岛采油厂 | Taper sleeve type motor belt pulley |
| CN202560983U (en) * | 2012-02-22 | 2012-11-28 | 大连大工安道船舶技术有限责任公司 | Transmission belt pulley for refrigerating equipment |
-
2012
- 2012-02-22 CN CN2012100406393A patent/CN102537280A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009127645A (en) * | 2007-11-20 | 2009-06-11 | F C C:Kk | Pulley for driving force transmission |
| CN201180776Y (en) * | 2008-04-11 | 2009-01-14 | 仇高岱 | Combined belt pulley |
| CN201496516U (en) * | 2009-09-07 | 2010-06-02 | 中国石油化工股份有限公司胜利油田分公司孤岛采油厂 | Taper sleeve type motor belt pulley |
| CN202560983U (en) * | 2012-02-22 | 2012-11-28 | 大连大工安道船舶技术有限责任公司 | Transmission belt pulley for refrigerating equipment |
Non-Patent Citations (2)
| Title |
|---|
| 何芹生: "锥形配合联结的设计计算", 《装备机械》 * |
| 章文道: "锥形衬套与通用皮带轮", 《机械设计》 * |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |