CN202560983U - Transmission belt pulley for refrigerating equipment - Google Patents
Transmission belt pulley for refrigerating equipment Download PDFInfo
- Publication number
- CN202560983U CN202560983U CN201220058255XU CN201220058255U CN202560983U CN 202560983 U CN202560983 U CN 202560983U CN 201220058255X U CN201220058255X U CN 201220058255XU CN 201220058255 U CN201220058255 U CN 201220058255U CN 202560983 U CN202560983 U CN 202560983U
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- CN
- China
- Prior art keywords
- belt pulley
- refrigerating equipment
- transmission belt
- pulley
- refrigerating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a transmission belt pulley for refrigerating equipment. The diameter D of the belt pulley is equal to 300-333mm; the slot number Z of the belt pulley is equal to 2; the diameter of a shaft hole of the belt pulley is 25.4mm and the taper is 2 degrees 51 minutes and 44 seconds; the belt pulley is manufactured by HT250 which is cast into a blank, formed by adopting machining and then receives a standard dynamic balance of 0.2g; and the overall weight scope of the belt pulley is 8.2-8.4kg. The transmission belt pulley for refrigerating equipment is a transmission belt pulley with simple structure and skillful design, which can be used for the refrigerating equipment of ships adopting R22 as refrigerating fluid. The transmission belt pulley for refrigerating equipment can be used for saving a huge amount of capitals and costs for users and has very significant economic benefit.
Description
Technical field
The utility model relates to a kind of belt pulley, and 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 utility model 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.
The technical solution of the utility model 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 utility model is compared 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 utility model embodiment's a plan view.
Fig. 2 is the utility model embodiment's a left view.
Embodiment
Below with the embodiment of accompanying drawings the utility model.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 defeated vapour amount V
h22 of the theory that compressor is new.
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
2 behind the calculating replacement refrigeration agent.
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 |
|---|---|---|---|
| CN201220058255XU CN202560983U (en) | 2012-02-22 | 2012-02-22 | Transmission belt pulley for refrigerating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220058255XU CN202560983U (en) | 2012-02-22 | 2012-02-22 | Transmission belt pulley for refrigerating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202560983U true CN202560983U (en) | 2012-11-28 |
Family
ID=47210643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220058255XU Expired - Fee Related CN202560983U (en) | 2012-02-22 | 2012-02-22 | Transmission belt pulley for refrigerating equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202560983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537280A (en) * | 2012-02-22 | 2012-07-04 | 大连大工安道船舶技术有限责任公司 | Driving pulley for refrigeration equipment |
-
2012
- 2012-02-22 CN CN201220058255XU patent/CN202560983U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537280A (en) * | 2012-02-22 | 2012-07-04 | 大连大工安道船舶技术有限责任公司 | Driving pulley for refrigeration equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20150222 |
|
| EXPY | Termination of patent right or utility model |