CN204420529U - The automatic lubricator of claw type dry vacuum pump transmission system - Google Patents

Abstract

The utility model discloses an automatic lubricating device for a transmission system of a claw-shaped dry vacuum pump. The claw-shaped dry vacuum pump includes a driving shaft, a driven shaft, and a pump body, a bottom plate, a base, and a gear box sequentially arranged from top to bottom. The lower parts of the shaft and the driven shaft extend into the gearbox and are meshed by the transmission gear. The parts of the driving shaft and the driven shaft in the bottom plate and the base are sequentially equipped with combined seals, thrust bearings, and angular bearings from top to bottom. The lower end of the bearing, the driving shaft or the driven shaft is equipped with a synchronous self-priming oil pump, and the oil outlet of the synchronous self-priming pump is connected to the gap between the combined seal and the thrust bearing through the oil delivery pipe and the oil delivery hole. The oil seepage holes on the bottom plate and the base communicate with the gear case. It can realize the automatic circulation of lubricating oil between the gearbox, base and bottom plate, and realize the lubrication, cooling and cleaning of bearings and gears.

Description

Automatic Lubricating Device for Claw Dry Vacuum Pump Transmission System

technical field

The utility model relates to a claw-shaped dry vacuum pump, in particular to an automatic lubricating device for a transmission system of the claw-shaped dry vacuum pump.

Background technique

The transmission lubrication of the claw-shaped dry vacuum pump in the prior art relies on the contact between the lubricating oil in the gear box and the gears, and the gears rotate and splash the oil to ensure the lubrication of the gears. Bearings are lubricated with injected grease.

The above two lubrication technologies have at least the following disadvantages:

There needs to be a lot of lubricating oil in the gearbox, the oil storage is too large, and the free space becomes smaller; with the rotation of the vacuum pump, the oil temperature rises, the oil expands and vaporizes, and the oil is sprayed from the oil and gas discharge port, which not only pollutes the environment but also poses a safety hazard. Hidden dangers, while increasing cost waste.

As the bearing on the base rotates at a high speed (2800n/min) for a long time, the temperature rises, and the grease on the bearing gradually melts and loses. Not filling in time; the bearing is not fully lubricated and is easily worn or even damaged.

Utility model content

The purpose of this utility model is to provide an automatic lubricating device for a claw-shaped dry vacuum pump transmission system that can realize automatic circulation of lubricating oil between the gear box, the base and the bottom plate.

The purpose of this utility model is achieved by the following technical solutions:

The utility model is an automatic lubricating device for a claw-shaped dry vacuum pump transmission system. The claw-shaped dry vacuum pump includes a driving shaft, a driven shaft, and a pump body, a bottom plate, a base, and a gear box arranged in sequence from top to bottom. The driving shaft The lower part of the driven shaft and the driven shaft extend into the gear box and engage with the transmission gear, and the parts of the driven shaft and the driven shaft in the bottom plate and the base are sequentially equipped with combined seals and thrust bearings from top to bottom 1. Angular bearing, the lower end of the driving shaft or the driven shaft is equipped with a synchronous self-priming oil pump, and the oil outlet of the synchronous self-priming pump is connected between the combined seal and the thrust bearing through an oil delivery pipe and an oil delivery hole In the gap, the gap communicates with the gear box through the oil seepage hole provided on the bottom plate and the base.

It can be seen from the above-mentioned technical solution provided by the utility model that the automatic lubricating device of the claw-shaped dry vacuum pump transmission system provided by the embodiment of the utility model, since the lower end of the transmission shaft is equipped with a synchronous self-priming oil pump, the outlet of the synchronous self-priming pump The oil port is connected to the gap between the combined seal and the thrust bearing through the oil delivery pipe and the oil delivery hole. Realize the automatic circulation of lubricating oil to achieve the purpose of lubricating, cooling and cleaning bearings and gears.

Description of drawings

Fig. 1 is a front sectional structural schematic diagram of the automatic lubricating device of the claw-shaped dry vacuum pump transmission system provided by the embodiment of the present invention;

Fig. 2 is a side sectional structural schematic diagram of the automatic lubricating device of the claw-shaped dry vacuum pump transmission system provided by the embodiment of the utility model;

Fig. 3 is a schematic diagram of the outline structure of the synchronous self-priming oil pump in the embodiment of the utility model;

Fig. 4 is a schematic diagram of the disassembled structure of the synchronous self-priming oil pump in the embodiment of the utility model.

In the picture:

1—horizontal oil delivery hole on the bottom plate, 2—lubricating oil observation window, 3—vertical oil delivery hole on the base, 4—gearbox oil delivery hole, 5—oil level window, 6—oil drain hole, 7—oil delivery pipe, 8— Driven shaft, 9—driven gear, 10—driving gear, 11—synchronous self-priming oil pump, 12—oil outlet tee joint, 13—driving shaft, 14—angular bearing, 15—thrust bearing, 16—combination Type seal, 17—motor, 18—motor gear, 19—base, 20—gear box, 21—transition gear, 22—bottom plate, 23—oil pump inlet, 24—base oil seepage hole;

31—oil pump rotor shaft end boss, 32—oil pump oil inlet hole, 33—oil pump casing, 34—oil pump five-star pump chamber, 35—oil pump four-corner rotor, 36—oil pump base.

Detailed ways

The embodiments of the present utility model will be further described in detail below.

The automatic lubricating device of the claw-shaped dry vacuum pump transmission system of the present utility model has a preferred specific implementation mode as follows:

The claw-type dry vacuum pump includes a driving shaft, a driven shaft, and a pump body, a bottom plate, a base, and a gear box arranged in sequence from top to bottom. The lower parts of the driving shaft and the driven shaft extend into the gear box and pass through the The transmission gear meshes, and the part of the driving shaft and the driven shaft in the bottom plate and the base is equipped with a combined seal, a thrust bearing, and an angular bearing in sequence from top to bottom, and the lower end of the driving shaft or the driven shaft is installed There is a synchronous self-priming pump, the oil outlet of the synchronous self-priming pump is connected to the gap between the combined seal and the thrust bearing through the oil delivery pipe and the oil delivery hole, and the gap is passed through the gap between the bottom plate and the base. The oil seepage hole communicates with the gear case.

The oil outlet of the synchronous self-priming pump is connected with two oil delivery pipes through a three-way joint, and the two oil delivery pipes communicate with the bearing parts of the driving shaft and the driven shaft through oil delivery holes respectively.

The oil delivery hole includes interconnected gearbox oil delivery holes, vertical oil delivery holes on the base, and horizontal oil delivery holes on the bottom plate. The oil delivery pipe is attached and fixed on the bottom side wall of the gearbox, and the outer end of the oil delivery pipe is bent The pipe joint is connected and fixed on the oil delivery hole of the gear box.

The rotor shaft head of the synchronous self-priming oil pump is connected with the shaft head of the driving shaft or the driven shaft through concave-convex buckle.

The outer end of the horizontal oil delivery hole of the bottom plate is equipped with a lubrication observation window.

The gear box is provided with an oil filling pipe, an oil level window, and an oil discharge hole.

An oil filling cap with a side hole is installed above the oil filling pipe.

The synchronous self-priming pump includes an oil pump casing and an oil pump base. An oil pump five-star pump cavity is arranged in the oil pump casing, and a four-corner rotor of the oil pump is arranged in the five-star pump cavity. The upper wall of the oil pump casing is provided with an oil pump oil inlet hole.

The automatic lubricating device of the claw-shaped dry vacuum pump transmission system of the utility model is applied to the claw-shaped dry vacuum pump and installed in a gear box. This device ensures that the bearings and gears of the claw-type dry vacuum pump transmission system are fully lubricated and cooled during operation. The service life of bearings and gears is improved, and the failure rate and maintenance cost of claw dry vacuum pumps are reduced.

Specific examples:

As shown in Figure 1 and Figure 2, a pair of driving shafts 13 and driven shafts 8 parallel to each other are arranged in the pump body of the claw-shaped dry vacuum pump, and the lower ends of the driving and driven shafts are respectively equipped with a driving gear 10 and a driven gear 9; 1. The same number of teeth of the driven gears meshes with each other, and its power comes from the motor gear 18 driving an intermediate transition gear (intermediate wheel) 21 to drive the master and slave shafts to rotate in reverse at the same speed.

On the base 19 and the bottom plate 22, there are thrust bearings 15, angular bearings 14 and comprehensive sealing device 16, respectively, to support and control the axial and radial runout of the driving and driven shafts and the up and down isolation of the medium.

A synchronous self-priming oil pump 11 is provided at the bottom of the gear box 20 . The oil pump is connected with the driving shaft. When the driving gear rotates, it drives the synchronous self-priming pump to do work, and the lubricating oil stored in the gear box passes through the self-priming oil pump, the oil delivery pipe 7, the vertical oil delivery hole 3 on the base and the horizontal oil delivery hole 1 on the bottom plate to the oil in the bottom plate. The thrust bearing 15 supplies oil; the lubricating oil descends naturally through the oil seepage hole 24 to lubricate the base angular bearing 14 and each gear, and finally falls back to the gear box.

The utility model can realize the automatic circulation of lubricating oil between the gear box, the base and the bottom plate, so as to achieve the purpose of lubricating, cooling and cleaning the bearings and gears.

As shown in Figures 3 and 4, the rotor 35 of the synchronous self-priming oil pump is in the shape of a square, and the "follow-up" pump cavity 34 of the oil pump is in the shape of an inner pentagonal quincunx, and the shaft end of the oil pump rotor is connected to the shaft end of the vacuum pump driving shaft. When the vacuum pump is working, the driving shaft drives the synchronous self-priming pump to rotate. At this time, the star-shaped rotor in the oil pump continuously changes phases in the five-pointed star-shaped pump cavity, forming a space pressure difference, and continuously sucks and discharges the lubricating oil in the gearbox. oil pump.

The oil discharge port of the synchronous self-priming oil pump is connected to the oil delivery pipeline with a three-way joint. The other end of the oil delivery pipeline is connected to the oil delivery hole of the gear box. The oil delivery hole on the upper part communicates with the thrust bearing inwardly, and connects with the observation hole of the oil window outwardly.

When the vacuum pump is running, the lubricating oil in the gearbox will deliver oil to the bearings on the main and driven shafts through the self-priming oil pump, oil pipeline, gearbox, base, and bottom plate, lubricate the bearings, and the gears fall back to the gearbox to form a set of automatic sealing lubrication circulation system.

The self-priming oil pump of the claw-type dry vacuum pump is connected with the driving shaft and rotates at a speed of 2800n/s, which increases the oil supply pressure, makes the bearings and gears fully lubricated and cooled, prolongs the service life of the bearings, and reduces the gear transmission noise . At the same time, the oil storage capacity in the gearbox is also reduced. The danger of thermal expansion and gasification overflow due to excessive oil storage is avoided.

The rotor shaft end boss 31 of the synchronous self-priming oil pump fixed on the bottom of the gear box is connected with the shaft end groove of the drive shaft in a tenon-tenon manner, and the synchronous self-priming oil pump starts to rotate and perform work. The lubricating oil in the gearbox enters the oil pump from the oil inlet 32 of the synchronous self-priming oil pump, and a three-way joint 23 is installed at the oil outlet of the synchronous self-priming oil pump, and is connected to the oil delivery hole interface on both sides of the gearbox through the oil delivery pipe in two ways .

On both sides of the base corresponding to the oil delivery holes of the gearbox, two vertical oil delivery holes are provided to communicate with the two vertical oil delivery holes of the mutually perpendicular three-way oil passage on the bottom plate. The three-way oil passage on the base plate is horizontally inwardly connected to the bearing, and the observation window 2 is installed outward to monitor the lubrication condition of the oil passage.

Above the thrust bearing in the bottom plate, there are combined seals 16 such as a skeleton oil seal, a spiral seal, and a labyrinth seal to prevent the lubricating oil from seeping upward into the working chamber. gear, back down the gearbox.

An oil level observation window 35 is installed on the side of the gear case to monitor the oil level of the gear case.

Oil drain hole 36 is installed at the side lower end of gear box, to utilize the lubricating oil in the gear box to change discharge and clean up.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (8)

1. the automatic lubricator of a claw type dry vacuum pump transmission system, claw type dry vacuum pump comprises driving shaft, driven shaft and the pump housing set gradually from top to bottom, base plate, base, gear-box, the bottom of described driving shaft and driven shaft to be extend in described gear-box and is engaged by driving gear, described driving shaft and the part of driven shaft in described base plate and base are equipped with combined labyrinth and carbon gland from top to bottom successively, thrust-bearing, angle bearing, it is characterized in that, synchronous self-suction oil pump is equipped with in the lower end of described driving shaft or driven shaft, the oil outlet of described synchronous self-priming pump is communicated in the gap between described combined labyrinth and carbon gland and thrust-bearing by transport pipe and oil transportation hole, this gap is communicated with described gear-box with the oil seepage hole on base by being arranged on described base plate.

2. the automatic lubricator of claw type dry vacuum pump transmission system according to claim 1, it is characterized in that, the oil outlet of described synchronous self-priming pump is connected with two transport pipe by tee union, and two transport pipe are communicated with the bearing portion of driven shaft with described driving shaft respectively by oil transportation hole.

3. the automatic lubricator of claw type dry vacuum pump transmission system according to claim 2, it is characterized in that, described oil transportation hole comprise be interconnected gear-box oil transportation hole, the vertical oil transportation hole of base, floor level oil transportation hole, described transport pipe attaches and is fixed on bottom described gear-box on sidewall, and the outer end of transport pipe is fastened on described gear-box oil transportation hole by elbow.

4. the automatic lubricator of claw type dry vacuum pump transmission system according to claim 3, is characterized in that, the rotor spindle nose of described synchronous self-suction oil pump is connected by concavo-convex coak mode with the spindle nose of described driving shaft or driven shaft.

5. the automatic lubricator of claw type dry vacuum pump transmission system according to claim 4, is characterized in that, lubrication viewing window is equipped with in the outer end in described floor level oil transportation hole.

6. the automatic lubricator of claw type dry vacuum pump transmission system according to claim 5, it is characterized in that, described gear-box is provided with oil filler pipe, oil level sight window, drain oil.

7. the automatic lubricator of claw type dry vacuum pump transmission system according to claim 6, is characterized in that, the top of described oil filler pipe is provided with the oil filler cap of band lateral aperture.

8. the automatic lubricator of the claw type dry vacuum pump transmission system according to any one of claim 1 to 7, it is characterized in that, described synchronous self-priming pump comprises oil pump housing and oil pump base, oil pump five-pointed star pump chamber is provided with in oil pump housing, oil pump four sided rotor is provided with in oil pump five-pointed star pump chamber, the axle head boss of oil pump four sided rotor stretches out the upper wall of oil pump housing, and the upper wall of oil pump housing is provided with oil pump oil inlet hole.