CN2293665Y

CN2293665Y - Insulation screw pump

Info

Publication number: CN2293665Y
Application number: CN 96223955
Authority: CN
Inventors: 沈訚
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-29
Filing date: 1996-10-29
Publication date: 1998-10-07
Anticipated expiration: 2006-10-29

Abstract

The utility model relates to a novel thermal-insulating screw pump which comprises a pump body, a pump sleeve, an active screw, a passive screw, a sliding bearing, a rear lid, an input port, an output port and a thermal-insulating loop. The novel thermal-insulating screw pump is characterized in that the two ends of the pump body is provided with step shaped sealed bodies which give the sealed function to a working chamber body. The step positions are provided with sealing gaskets. Axial sealing and a bearing body are arranged on the outside of the pump body, and a circular insulating sleeve is arranged on the bearing body. The rear end face of the passive screw is provided with an anti-retreating pad. The advantages of the utility model are that the step shaped sealed bodies and the sealing gaskets are used by the novel thermal-insulating screw pump, the producing is easy and the sealing is reliable, making the working scope of a pump enlarged. The bearing body and the bearing are arranged on the outside of the pump body to enhance the service life of the pump. The utility model is widely suitable to the industrial departments of the metallurgy, the oilfield, the chemical industry, the textile and the road construction to convey the lubricity medium.

Description

The novel heat insulation screw pump

The utility model relates to a kind of volume type screw pump, particularly a kind of Thermal insulation screw pump with heating and cooling function.

In order to solve the problem that can not normally carry owing to there is not heat insulation function that existing screw pump exists when the bigger medium of transport viscosity, the applicant has applied for " Thermal insulation screw pump " on October 24th, 90 to Patent Office of the People's Republic of China, the patent No. is 90214652.1, this Thermal insulation screw pump utilizes heat insulation liquid that the pump housing is heated or cools off, and makes the screw pump no matter can both proper functioning under what temperature.Yet, because former the carrying on as before in this screw pump design has the following disadvantages: 1, bearing and bearing support place in the pump housing, make bearing and bearing support be subjected to the influence of impurity content in the high temperature of flowing medium in the pump housing and the medium, thereby make the lost of life of bearing and bearing support, therefore the life-span of the pump housing also shortens.2, pump housing two ends adopt " O " RunddichtringO that working cavity is sealed, and the mechanism of this sealing means is by the pressure change of medium " O " type circle contact condition itself, make it to realize sealing." O " type sealing is through the extrusion-deformation circular groove both sides of packing into, in actual production often because of seal groove degree of finish low or " O " RunddichtringO compressive strain and temperature deformation rate not to producing leakage.In addition, " O " RunddichtringO generally adapts to the working environment between-60 ℃～200 ℃.If make the insulation medium with 300 ℃ of conduction oils, " O " RunddichtringO is very fast aging and ineffective.3, because the influence of flowing medium pressure difference in the pump housing, driven screw axial extrusion abrasion, thus influence working life of the pump housing.

The purpose of this utility model provides a kind of long service life, the novel heat insulation screw pump of good sealing effect.

The purpose of this utility model is to realize like this, it comprises the pump housing, pump block, the active screw rod, driven screw rod, sliding bearing, bonnet, heat insulation liquid inlet opening and exhaust port, the pump housing is provided with the through hole of one group of closed at both ends, be provided with the annular through-hole that communicates with through hole and form closed heat transfer loop at the two ends of the pump housing, initiatively screw rod and driven screw rod place in the pump block, pump block places in the pump housing, its feature is provided with the stepped shaft seal that working cavity is sealed in the two ends at the pump housing, the step place is provided with gasket seal, axial seal and bearing support are set in place in the active screw rod input end in the working cavity outside, initiatively screw rod is by the roller bearings in the bearing support, and it is spacing by snap ring and bearing gland, ear end face at driven screw rod is provided with the retaining pad that the center has through hole, and its through hole communicates with working cavity.The utility model outstanding characteristics on structural design are to adopt the stepped shaft seal that working cavity is sealed at the two ends of the pump housing, and the place is provided with gasket seal at step.Thereby improved the sealing effect of working cavity widely.In order to improve the working life of pump, the utility model places axial seal and bearing support and rolling bearing outside the pump housing, has avoided the influence of high temperature media and impurity in the pump housing, the working life of having improved axial seal and bearing support and bearing.Simultaneously, in order to overcome in the pump housing flowing medium pressure difference to the influence of driven screw axial extrusion abrasion, the utility model is provided with retaining sheet at the ear end face place of driven screw rod, there is the through hole that communicates with working cavity at this retaining sheet center, and the medium that charges into from working cavity had both made driven screw rod keep longitudinal balance, can serve as lubricant oil again and reduces mechanical wear, thereby improved the working life of the pump housing, after the retaining sheet wearing and tearing, can change economic and reliable easily.For the convenience of processing and fabricating, the stepped shaft seal of pump housing rear end can be processed into one with pump block.When bearing support is in hot operation, can on bearing support, put and have annular through-hole and have the ring of heat insulation liquid inlet opening and exhaust port to open lagging, the heat-insulation system of this cooling system and the pump housing is separate.

The utility model compared with prior art, its remarkable advantage is: 1, owing to adopt stepped shaft seal and gasket seal, therefore, make simple, sealing is reliable, and the operating range of pump is enlarged, and can carry high high temperature media to 350 ℃.2, bearing support and bearing are placed outside the pump housing, and have independently cooling system, improved the life-span of bearing support and bearing.3, the ear end face at driven screw rod is provided with retaining sheet, has improved the working life of the pump housing, and retaining sheet is changed conveniently.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is an axial section structural representation of the present utility model.

Fig. 2 is the utility model cross section structure schematic representation.

Embodiment: with the 3GBW45 Thermal insulation screw pump is example, the novel heat insulation screw pump that the utility model is made comprises the pump housing 1, pump block 2, active screw rod 3, driven screw rod 4, sliding bearing 5, bonnet 6, heat insulation liquid inlet opening 7, exhaust port 8, through hole 9, annular through-hole 10, stepped shaft seal 11, gasket seal 12, axial seal 13, bearing support 14, rolling bearing 15, snap ring 16, bearing gland 17, retaining pad 18, annular through-hole 19, annular lagging 20.The pump housing 1 has 4 footpaths, in through hole 9 is arranged, pump block 2 places in the pump housing 1, the rear end of pump block 2 be processed with stepped shaft seal 11 and with the pump housing 1 sealing, the step place is provided with gasket seal 12.Initiatively screw rod 3 and driven screw rod 4 place in the pump block 2, and its rear end is supported by sliding bearing 5, and the ear end face of driven screw rod 4 is provided with the retaining pad 18 that has central through bore, and central through bore communicates with working cavity.Front end at the pump housing 1 and pump block 2 is provided with stepped shaft seal 11, the step place is provided with gasket seal 12, on the active screw rod 6 that is positioned at stepped shaft seal 11 outsides, be provided with axial seal 13 and bearing support 14, the front end of driven screw rod 4 is supported by pump block 2, initiatively the input end of screw rod 3 is supported by the rolling bearing in the bearing support 14 15, rolling bearing 15 is spacing by snap ring 16 and bearing gland 17, on bearing support 14, be with annular lagging 20, and it is spacing by bearing gland 17, be provided with annular through-hole 19 in the annular lagging 20, this annular through-hole 19 has inlet opening and exhaust port.

Claims

1, a kind of novel heat insulation screw pump, it comprises the pump housing [1], pump block [2], active screw rod [3], driven screw rod [4], sliding bearing [5], bonnet [6], heat insulation liquid inlet opening [7] and exhaust port [8], the pump housing [1] is provided with the through hole [9] of one group of closed at both ends, be provided with the annular through-hole [10] that communicates with through hole [9] and form closed heat transfer loop at the two ends of the pump housing [1], initiatively screw rod [3] and driven screw rod [4] place in the pump block [2], pump block [2] places in the pump housing [1], it is characterized in that being provided with the stepped shaft seal [11] that working cavity is sealed at the two ends of the pump housing [1], the step place is provided with gasket seal [12], axial seal [13] and bearing support [14] are set in place in active screw rod [3] input end in the working cavity outside, initiatively screw rod [3] is supported by the rolling bearing [15] in the bearing support [14], and it is spacing by snap ring [16] and bearing gland [17], ear end face at driven screw rod [4] is provided with the retaining pad [18] that the center has through hole, and its through hole communicates with working cavity.

2, novel heat insulation screw pump according to claim 1 is characterized in that being provided with the annular lagging [20] that has annular through-hole [19] and heat insulation liquid inlet opening and exhaust port are arranged on bearing support [14].

3,, it is characterized in that the stepped shaft seal [11] of the pump housing [1] rear end and pump block [2] are connected as a single entity according to claim 1,2 described novel heat insulation screw pumps.