CN203856719U - Double-screw type shaft head pump of compressor - Google Patents
Double-screw type shaft head pump of compressor Download PDFInfo
- Publication number
- CN203856719U CN203856719U CN201320696318.9U CN201320696318U CN203856719U CN 203856719 U CN203856719 U CN 203856719U CN 201320696318 U CN201320696318 U CN 201320696318U CN 203856719 U CN203856719 U CN 203856719U
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- Prior art keywords
- screw rod
- compressor
- screw
- pump
- double
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- 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.)
- Expired - Lifetime
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model provides a double-screw type shaft head pump of a compressor. The double-screw type shaft head pump comprises a pump body with a suction inlet and an exhaust outlet, wherein a driving screw and a driven screw, which are meshed with each other, are arranged in the pump body; the two ends of the pump body are sealed by a front cover and a rear cover; one end of the driving screw extends to the outer side of the front cover and is connected with a crankshaft of the compressor, and the other end of the driving screw is supported on the rear cover through a movable bearing; a rolling bearing is arranged between the driving screw and the front cover; the two ends of the driven screw are supported between the front cover and the rear cover through sliding bearings; a left screw sleeve and a right screw sleeve are arranged on the driving screw and the driven screw, respectively; synchronous gears, which are connected with the driving screw and the driven screw, are arranged between the left screw sleeve and the right screw sleeve. Therefore, the operating life of the shaft head pump is further prolonged, the manufacturing cost is reduced, and the operation of the compressor is facilitated.
Description
Technical field
The utility model relates to a kind of machinery, particularly a kind of compressor double-screw type spindle nose pump.
Background technique
Compressor is by the spindle nose pump being connected with described compressor crankcase is set, and each moving element and crosshead mechanism in compressor crankcase carry lubricant oil.
Traditional compressor spindle nose pump generally adopts gear pump, by compressor main shaft, drives overdrive gear driving gear pump that lubricant oil is provided.Gear pump is to rely on formed swept volume between pumping cylinder and engaging gear to change and the mobile rotary pump of carrying liquid or making it supercharging.By two gears, the pump housing and front and rear covers, form two enclosed spaces, when gear rotates, the volume in the space of the side that is out of gear is large from little change, forms vacuum, and liquid is sucked, and the volume in the space of gear engagement side is from diminishing greatly, and liquid is clamp-oned in pipeline and gone.Suction chamber and discharge side are to lean on the line of contact of two gears to separate.The pressure of the exhaust port of gear pump depends on the size that pumps place's resistance completely.
Because gear pump volumetric efficiency is lower, when rotational velocity is lower, face leakage is large, refluxes serious, can not realize the work that is directly connected with compressor crank shaft, and therefore, traditional compressor spindle nose pump also has additional overdrive gear, to overcome the problems referred to above.
Yet, the pressure imbalance bearing on gear, axle and bearing due to gear pump, radial load is large, therefore cause gear pump easily to vibrate, noise is large, and service life is short continuously, and occurs leakage of oil after operation a period of time, cause apparatus body laying dust and spot serious, cause equipment cannot normally move, affect equipment appearance image and increase cleaned in situ difficulty.
For addressing the above problem, prior art is removed spindle nose pump, at the compressor bank lubricating oil station DFF Direct Fuel Feed that utilizes in service.Yet, because compressor bank and lubricating oil station power supply adhere to different high and low pressure systems separately, once the low service system under petrol station has a power failure, or because causing fuel feeding, other reasons stops, make compressor host operation bring very big risk, even cause single unit system normally to move; Meanwhile, also need to set up corresponding instrument locking system, and then cost is increased.
Therefore, how to provide a kind of volumetric efficiency high, reflux few, noise is low, and the spindle nose pump that service life is long becomes technical problem urgently to be resolved hurrily.
Model utility content
The utility model provides a kind of compressor double-screw type spindle nose pump, by cooperatively interacting of active screw rod and driven screw rod, in compressor crankcase, provides lubricant oil.
For addressing the above problem, the utility model provides a kind of compressor double-screw type spindle nose pump, comprise: have the pump housing of suction port and exhaust port, be provided with intermeshing active screw rod and driven screw rod in the described pump housing, the two ends of the described pump housing seal by protecgulum and the bonnet arranging; The outside that one end of described active screw rod extends to described protecgulum is connected with compressor crank shaft, and the other end is supported on described bonnet via live bearing, and between described active screw rod and described protecgulum, rolling bearing is installed; The two ends of described driven screw rod are supported between described protecgulum and described bonnet by sliding bearing; On described active screw rod and described driven screw rod, be respectively arranged with two swivel nuts in left and right, between the swivel nut of two of described left and right, be provided with the synchromesh gear being connected with driven screw rod with described active screw rod.
Alternatively, between described protecgulum and described pump housing inner chamber, be provided with seal ring.
Alternatively, described seal ring is lip-type packing.
Alternatively, in the joint of described active screw rod and bearing of compressor, be provided with location sealing lid.
Alternatively, between described sliding bearing and bearing, be provided with bearing shell.
The compressor double-screw type spindle nose pump that the utility model provides, first, because two screw pump volumetric efficiency is high, initiatively screw rod and driven screw clearance are little, therefore reflux few, and work can directly be connected with compressor crank shaft; Secondly, adopt two screw pump structure, axial force is balance voluntarily, initiatively between screw rod and driven screw rod, by synchromesh gear, contacts, and then makes to vibrate between principal and subordinate's screw rod little, and noise is low, and continuous service life is long.Then, screw pump feed flow balance, pulsating movement free, vibrates little; Finally, because twin-screw (300～500r/min) screw pump suction capacity when the low-speed running surpasses 8～10M, be very beneficial for compressor operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment and technological scheme of the prior art, to the accompanying drawing of required use in embodiment and description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of compressor double-screw type spindle nose pump the first embodiment's of providing of the utility model external structure schematic diagram;
Fig. 2 is a kind of compressor double-screw type spindle nose pump the first embodiment's of providing of the utility model internal structure schematic diagram.
Figure number explanation
Bonnet 1, driven screw rod 2, bearing shell 3, sliding bearing 4, active screw rod 5, the pump housing 6, suction port 6-1, exhaust port 6-2, location sealing lid 7, lip-type packing 8, bearing 9, protecgulum 10, right swivel nut 11, the first gear 12, the second gears 13, left swivel nut 14.
Embodiment
By the accompanying drawing engaging in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described below, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to shown in Fig. 1 and Fig. 2, Fig. 1 is a kind of compressor double-screw type spindle nose pump the first embodiment's of providing of the utility model external structure schematic diagram; Fig. 2 is a kind of compressor double-screw type spindle nose pump the first embodiment's of providing of the utility model internal structure schematic diagram.
The utility model provides a kind of compressor double-screw type spindle nose pump, comprise: the pump housing 6 with suction port 6-1 and exhaust port 6-2, in the described pump housing 6, be provided with intermeshing active screw rod 5 and driven screw rod 2, the two ends of the described pump housing 6 are by the protecgulum 10 and bonnet 1 sealing that arrange; The outside that one end of described active screw rod 5 extends to described protecgulum 10 and compressor crank shaft (figure depending on) are connected, and the other end is supported on described bonnet 1 via sliding bearing 4, and between described active screw rod 5 and described protecgulum 10, rolling bearing 9 is installed; The two ends of described driven screw rod 2 are supported between described protecgulum 10 and described bonnet 1 by sliding bearing 4; On described active screw rod 5 and described driven screw rod 2, be respectively arranged with two swivel nuts in left and right, be left swivel nut 11 and right swivel nut 14, between described left swivel nut and right swivel nut, be provided with the synchromesh gear being connected with driven screw rod 2 with described active screw rod 5,, the first gear 12 and the second gear 13, described the first gear 12 is positioned on described active screw rod 5, and described the second gear 13 is positioned on described driven screw rod 2.
For avoiding the leakage at double-screw type spindle nose pump, the utility model is provided with lip-type packing between described protecgulum and described pump housing inner chamber, in addition, is provided with location sealing lid in the joint of described active screw rod and bearing of compressor; And then make double-screw type spindle nose pump approach zero leakage.
At described sliding bearing and axle contact position, be provided with bearing shell, described bearing and bearing shell itself are lubricated with cooling by the medium in the pump housing.
A kind of compressor double-screw type spindle nose pump structure that the utility model provides is more than described, below in conjunction with said structure, describes the working principle of compressor double-screw type spindle nose pump.
A kind of compressor double-screw type spindle nose pump that the utility model provides, compressor is connected with described active screw rod by bent axle, described compressor crank shaft rotates and drives initiatively bolt rotary, under the rotation of described active screw rod, drive described driven screw rod synchronously to rotate, and be separately positioned on synchromesh gear on initiatively screw rod and driven screw rod for driving torque and the balance axial force of screw rod and driven screw rod initiatively.
The compressor double-screw type spindle nose pump that the utility model provides, the compressor double-screw type spindle nose pump that the utility model provides, first, because two screw pump volumetric efficiency is high, initiatively screw rod and driven screw clearance are little, therefore reflux few, and work can directly be connected with compressor crank shaft; Secondly, adopt two screw pump structure, axial force is balance voluntarily, initiatively between screw rod and driven screw rod, by synchromesh gear, contacts, and then makes to vibrate between principal and subordinate's screw rod little, and noise is low, and continuous service life is long.Then, screw pump feed flow balance, pulsating movement free, vibrates little; Finally, because twin-screw (300～500r/min) screw pump suction capacity when the low-speed running surpasses 8～10M, be very beneficial for compressor operation.
The preferred implementation that the foregoing is only a kind of compressor double-screw type spindle nose pump that the utility model provides, does not form the restriction to the utility model protection domain.Number of components in this embodiment is not limited to the mode adopting in embodiment; any any modification of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present utility model.
Claims (4)
1. a compressor double-screw type spindle nose pump, is characterized in that, comprising: have the pump housing of suction port and exhaust port, be provided with intermeshing active screw rod and driven screw rod in the described pump housing, the two ends of the described pump housing seal by protecgulum and the bonnet arranging; The outside that one end of described active screw rod extends to described protecgulum is connected with compressor crank shaft, and the other end is supported on described bonnet via live bearing, and between described active screw rod and described protecgulum, rolling bearing is installed; The two ends of described driven screw rod are supported between described protecgulum and described bonnet by sliding bearing; On described active screw rod and described driven screw rod, be respectively arranged with two swivel nuts in left and right, between the swivel nut of two of described left and right, be provided with the synchromesh gear being connected with driven screw rod with described active screw rod.
2. compressor double-screw type spindle nose pump according to claim 1, is characterized in that, between described protecgulum and described pump housing inner chamber, is provided with seal ring.
3. compressor double-screw type spindle nose pump according to claim 2, is characterized in that, described seal ring is lip-type packing.
4. compressor double-screw type spindle nose pump according to claim 1, is characterized in that, is provided with location sealing lid in the joint of described active screw rod and bearing of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320696318.9U CN203856719U (en) | 2013-11-06 | 2013-11-06 | Double-screw type shaft head pump of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320696318.9U CN203856719U (en) | 2013-11-06 | 2013-11-06 | Double-screw type shaft head pump of compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203856719U true CN203856719U (en) | 2014-10-01 |
Family
ID=51606574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320696318.9U Expired - Lifetime CN203856719U (en) | 2013-11-06 | 2013-11-06 | Double-screw type shaft head pump of compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203856719U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117212155A (en) * | 2023-08-15 | 2023-12-12 | 南京真空泵厂有限公司 | Double-screw vacuum pump rotor structure and vacuum pump |
-
2013
- 2013-11-06 CN CN201320696318.9U patent/CN203856719U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117212155A (en) * | 2023-08-15 | 2023-12-12 | 南京真空泵厂有限公司 | Double-screw vacuum pump rotor structure and vacuum pump |
| CN117212155B (en) * | 2023-08-15 | 2024-02-27 | 南京真空泵厂有限公司 | Double-screw vacuum pump rotor structure and vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |