CN2627219Y - Bolt expansion power machine - Google Patents

Abstract

A screw expansion power machine comprises two mutually meshed negative helical rotor and positive helical rotor, a shell, a bearing, an air inlet duct, as well as an air outlet duct, along with two pairs of two-way mechanical sealing devices with free floating type. The sealing devices are provided on the steps of two ends of helical rotor shafts, and between the shell body inner wall; the shaft surface is equipped with a graphite face ring contact connected with a moving ring, the other end of the moving ring is provided in a driving sleeve, and the end surface is adjacent to a spring in the driving sleeve; the driving sleeve is fixed on a sealing shaft sleeve, and the latter is fixed on the step of the helical rotor; the outer surface of the sealing shaft sleeve is equipped with a graphite moving ring and the moving ring base, and the latter is fixed on the driving sleeve with a driving pin; the outer surface of the sealing shaft sleeve is also equipped with a face ring contact connected with the graphite moving ring.

Description

Screw expansion motor

Technical field:

The utility model relates to a kind of screw expansion motor, is the power engine that is used to reclaim and utilize industrial exhaust heat, and it belongs to utilization and contains the power plant of hot fluid for power source.

Background technique:

The available dynamic machine, very high as steam turbine to parameter (pressure and temperature) requirement of steam, and require very tight to the quality (content of sulphur content and impurity) of steam, and it only is applicable to that superheated vapor or less efficiently utilize saturated vapour, when thermal source is hot water or hydrothermal solution, can only pass through complicated pretreatment, the step-down dilatation goes out a small amount of saturated vapour and could utilize, and maybe can only utilize hot water and can not utilize steam or carbonated drink two-phase.Because its seal arrangement is to adopt simple and easy seal arrangement, in the medium of high temperature and high pressure, cause water and oily mutual leakage easily, make the lost of life of screw power machine.

The model utility content:

The purpose of this utility model is: a kind of screw expansion motor is provided, and it is not high to steam parameter and quality requirements, is not only applicable to superheated vapor and saturated vapour, and can directly utilize hot water or carbonated drink two-phase to produce power expeditiously; Simultaneously it has floating type two-way mechanical seal device, makes power engine smooth running under low vibration and low noise operating mode, and can not produce profit leak mutually in the medium of High Temperature High Pressure, can be applicable to and keep out operating mode to have the purpose of long-life again thereby reach.

The technical solution of the utility model is: screw expansion motor is provided with two intermeshing yin, yang helical rotors, and they pass through the Bearing Installation at two ends in housing; Two ends at housing are provided with front and rear cover, are provided with intake duct and air inlet road junction on the top of housing, and lead to the yin, yang helical rotor; Below helical rotor, be provided with air outlet flue; Two pairs of floating type two-way mechanical seal device respectively are housed between the axial plane of housing and yin, yang helical rotor, and it is located at the step place at helical rotor axle two ends, and between the inner walls; One graphite stationary ring is housed on larger-diameter axial plane is connected with a rotating ring contact, the other end of rotating ring is located in the drive sleeve, the spring adjacency in its end face and the drive sleeve; Drive sleeve is fixed on the sealing axle sleeve, and the latter is fixed on the step place of helical rotor axle by threaded connector; Be provided with a graphite rotating ring and a rotating seat thereof on the outer surface of sealing axle sleeve, this rotating seat is fixed on the drive sleeve by driving pin; On the radially step of sealing axle sleeve, be provided with 12 uniform holes, secondary spring is housed in it, the baffle plate location is arranged in the front of secondary spring; Also being provided with a stationary ring on the outer surface of sealing axle sleeve is connected with the contact of graphite rotating ring.

Advantage of the present utility model is:

1, the screw expansion motor body is that low-grade steam power machine is energy-saving and cost-reducing, highly effective.Be not only applicable to superheated vapor and saturated vapour, and can directly utilize hot water or carbonated drink two-phase high efficiency to produce power or generating.

2, because not high to the parameter and the quality requirements of steam, can be fit to the steam or the hydrothermal solution of various states, so it be specially adapted in, small power plant, substitute motor-operated feed water pump and blower fan can be saved a large amount of electricity consumptions by its; The used heat liquid and the waste hot gas that discharge for enterprise find an available approach, bring considerable recovery benefit.

3, owing to adopted specially designed floating type two-way mechanical seal, do cooling and lubricated with water, make power engine under the situation of high temperature and high pressure medium, oil and cooling water do not leak mutually, and be efficient sealed, reduced bending deflection, prolonged service life of a machine.

4, increasingly automated, startup-shutdown is easy, and operation need not post, and dismounting and replacing component are easy.

Description of drawings:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the A-A sectional view among Fig. 1

Fig. 3 is the enlarged view of floating type two-way mechanical seal device among Fig. 1

Embodiment:

As illustrated in fig. 1 and 2: screw expansion motor comprises a male screw rotor 1 and a female screw rotor 2, and they respectively are installed on front case 4, middle casing 5 and the rear case 6 by pair of bearings 3; Male screw rotor 1 is dextrorotation, and its right axle head stretches out outside the front cover 7 that is located at front case 4, is power take-off.Female screw rotor 2 is left-handed, and (be blocked on Fig. 1 and also stretch out outside the front cover 7, which is provided with speed measurement device, the outside of positive and negative helical rotor 1 and 2 left axle head is provided with rear end cover 8 to its right axle head, and its periphery is fixed on the rear case 6.The top of front case 4 is provided with intake duct 9 and air inlet road junction 10, and air inlet road junction 10 and positive and negative helical rotor 1 contact with 2 end face.Below helical rotor, be provided with air outlet flue 11.Front and back housing 4 and 6 and the axial plane of positive and negative helical rotor 1 and 2 between a pair of floating type two-way mechanical seal device 12 respectively is housed.

The workflow of screw expansion motor is: the hot water with uniform temperature and pressure, steam or the steam two-phase fluid air inlet road junction 10 in air flue 9 enters front case 4, in the teeth groove that enters male rotor 1, the cavity volume of steam or hydrothermal solution increases gradually, steam or hydrothermal solution step-down cooling are expanded and are done work, and promote rotor 1 and 2 and rotate.Finishing the steam or the hydrothermal solution of merit is discharged by air outlet flue 11.Power can drive equipment such as feed water pump, blower fan or generator by the output terminal output of male rotor 1.

As shown in Figure 3: floating type two-way mechanical seal device 12 of the present utility model is located at the step place at helical rotor two ends, and between forward and backward housing 4 and 6 inwalls, one graphite stationary ring 13 is housed on larger-diameter axial plane, it contacts with rotating ring 14 and links to each other, the other end of rotating ring 14 is located in the drive sleeve 15, spring 16 adjacency in its end face and the drive sleeve 15; Drive sleeve 15 is fixed on the sealing axle sleeve 17, and sealing axle sleeve 17 usefulness threaded connectors are fixed on the step place of helical rotor axle; Be provided with a graphite rotating ring 18 and rotating seat 19 thereof on the outer surface of sealing axle sleeve 17, this rotating seat 19 is fixed on the drive sleeve 15 by driving pin 20; On the radially step of sealing axle sleeve 17, be provided with 12 uniform holes, secondary spring 21 is housed in it, the baffle plate location is arranged in the front of secondary spring 21; Also being provided with a stationary ring 22 on the outer surface of sealing axle sleeve 17 is connected with 18 contacts of graphite rotating ring.This seal arrangement can make high temperature, the high-pressure medium of power engine with water body cooling and lubricated, and oil and cooling water do not leak mutually, reaches efficient sealed.

Claims (1)

1, a kind of screw expansion motor is provided with two intermeshing yin, yang helical rotors, and they pass through the Bearing Installation at two ends in housing; Two ends at housing are provided with front and rear cover, are provided with intake duct and air inlet road junction on the top of housing, and lead to the yin, yang helical rotor; Below helical rotor, be provided with air outlet flue; Two pairs of mechanical seal device respectively are housed between the axial plane of housing and yin, yang helical rotor, it is characterized in that:

Described mechanical seal device (12) is a kind of floating type two-way mechanical seal device, it is located at the step place at helical rotor two ends, and between housing (4, the 6) inwall, one graphite stationary ring (13) is housed on larger-diameter axial plane to be contacted continuous with rotating ring (14), the other end of rotating ring (14) is located in the drive sleeve (15), spring (16) adjacency in its end face and the drive sleeve (15); Drive sleeve (15) is fixed on the sealing axle sleeve (17), and the latter is fixed on the step place of helical rotor axle by threaded connector; Be provided with a graphite rotating ring (18) and rotating seat (19) thereof on the outer surface of sealing axle sleeve (17), this rotating seat (19) is fixed on the drive sleeve (15) by driving pin (20); On the radially step of sealing axle sleeve (17), be provided with 12 uniform holes, 12 secondary springs (21) are housed in it, the baffle plate location is arranged in the front of secondary spring (21); Also being provided with a stationary ring (22) on the outer surface of sealing axle sleeve (17) is connected with graphite rotating ring (18) contact.

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