CN2252903Y

CN2252903Y - Heat conducting oil pump having special sealing and radiating structure

Info

Publication number: CN2252903Y
Application number: CN 96231305
Authority: CN
Inventors: 奚翚; 李平
Original assignee: RONGXIN HEAT CONDUCTION OIL PUMP MANUFACTURE CO Ltd WUXI CITY
Current assignee: RONGXIN HEAT CONDUCTION OIL PUMP MANUFACTURE CO Ltd WUXI CITY
Priority date: 1996-02-12
Filing date: 1996-02-12
Publication date: 1997-04-23
Anticipated expiration: 2006-02-12

Abstract

The utility model relates to a heat conducting oil pump, particularly a heat conducting oil pump with an automatic compensation filling and sealing device and a bearing heat radiating structure. The utility model comprises a pump body, a pump cover, a pump shaft, an impeller, an inlet and an outlet. The automatic compensation filler which comprises a threaded rod, a filling ring, bottom ring, a press cover and a disk spring is arranged on a contacting point of the pump cover and the pump shaft. The outer end of the pump cover is connected with a cooling sleeve with cooling liquid, and the connecting point of the pump shaft and the cooling jacket is provided with a sealing seat.

Description

Heat-transfer Oil Pump with special seal and radiating structure

The utility model relates to Heat-transfer Oil Pump, specifically a kind of Heat-transfer Oil Pump with forward and reverse automatic compensation stuffing seal and bearing radiating structure.

At present, packing seal is generally all adopted in the sealing of Heat-transfer Oil Pump impeller side, filler is put into the stuffing box of pump cover, the time play sealing and to the supporting role of cantilevered axle in work, but there is following disadvantage in this structure: 1, since soft packing at impeller end, once mounting can not be adjusted, and can not compensate after the wearing and tearing, cause leakage easily, and do not have good supporting role, the conduction oil of high temperature flows in the bearing support, and the temperature of bearing is raise, influenced the life-span of bearing, secondly, the filler friction factor is big, and rebound elasticity is little, under working condition, easy scaling loss.

The purpose of this utility model is to design a kind of Heat-transfer Oil Pump with forward and reverse automatic compensation stuffing seal and bearing radiating structure, to overcome above-mentioned defective.

Its main technical schemes comprises the pump housing, pump cover and be installed in pump shaft on the pump cover, with be connected on the pump shaft, be positioned at the impeller of the cavity of the pump housing and pump cover formation, on the pump housing, connect import and the outlet that is communicated with cavity respectively, pump shaft utilizes Bearing Installation on the support that is connected in the pump cover end face, forward and reverse automatic compensation filler device is arranged in the contacting point of pump shaft and pump cover, in this compensation filler device, the gland that is enclosed within on the pump shaft is connected on the pump cover, uniform screw rod and nut on gland, this screw rod stretches into the cavity that is positioned at pump cover and pump shaft formation, and be enclosed within the expanded graphite packing ring of pump shaft outside, an end of band taper type is provided with base ring on screw rod; Between base ring and pump cover, also place the dish spring that is enclosed within the pump shaft outside; Gland utilizes Bolt Connection on pump cover, and support is a bearing support that has Lubricants, and pump shaft utilizes the top of Bearing Installation at bearing support, is provided with liquid filling hole and liquid feeding plug on bearing support, at the bearing support outer wall radiating fin is arranged; The support outer end connects end cap, there is the sealing seat that is enclosed within the pump shaft outside contacting point of this end cap and pump shaft, in the sealing seat, an end of band taper type is with base ring on the screw rod, the elastomer (expanded graphite packing ring) that is enclosed within the pump shaft outside is arranged between base ring and end cap, and the outer end of screw rod cooperates with nut after stretching out end cap.

The utility model has the advantages that owing to adopt expanded graphite as filler, it can use down at 450 ℃ that are higher than conduction oil maximum operation (service) temperature (350 ℃), thereby the higher temperature of ability, be difficult for scaling loss, secondly, the rebound elasticity of this filler is big, friction factor is little, and thermal conductivity is good, and is not all stressed contacting with pump shaft on the total length, thereby friction power loss is less, can not abrade axle; The 3rd, this device utilizes screw rod to regulate the sealing force of filler, thereby it is even to have sealing force, and the life-span is long, and is easy to loading and unloading, and forward and reverse pressure is the characteristics of compensation automatically; The 4th, stressed butterfly spring is as the gland sealed compensating part, thereby also improved the stressed irregular shortcoming of the single spring structure of original mechanical seal; The 5th, used elastomer is an expanded graphite packing ring, can keep excellent sealing ability under various operating modes and medium, and it has can recover the little advantage of elasticity, selflubricating and friction power loss when being subjected to suppressing.

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

Fig. 2 is the structural drawing of forward and reverse automatic compensation filler device (8).

Fig. 3 is the structural drawing of bearing support (4).

Fig. 4 is the structural drawing of sealing seat (2).

As shown in the figure: an end of the pump housing (10) is import (12), the other end connects pump cover (7), outlet (11) for being communicated with above with cavity that constitutes by the pump housing and pump cover (13) and import (12), pump shaft (5) is installed in the pump cover (7), pump shaft the inner is positioned at the impeller (9) in the cavity, the outer end of pump cover (7) is rack-mount, this support is a bearing support (4) that has lubricant oil (1), on bearing support, have liquid filling hole and liquid feeding plug, at the bearing support outer wall radiating fin (26) is arranged, pump shaft (5) utilizes bearing (6) to connect with bearing support (4).

In pump cover (7) and pump shaft (5) contacting point cavity is arranged, from left to right place to constitute gland (14), expanded graphite packing ring (17), the base ring (19) and dish spring (20) on the pump shaft (5) of being enclosed within of compensation filler device (8) in the cavity, and the screw rod (18) of uniform therein end band taper type, the taper type of this screw rod cooperates with base ring (19), is the dish spring between base ring and pump cover (7).Screw rod (18) right-hand member is fastened on the gland (14) with nut (15), adjusting nut, and the just sealing force of can regulate packing ring, gland (14) utilizes bolt (16) to be connected on the pump cover (7).The outer end of bearing support (4) connects end cap (3), the cavity that placement sealing seat (2) are arranged in the end cap (3) and the contacting point of pump shaft (5), base ring in the sealing seat (21) from left to right is enclosed within on the pump shaft (5) successively with elastomer (24), and the screw rod (23) of uniform betwixt end band taper type, this taper type cooperates with base ring (21), and it is fastening by nut (22) that the right-hand member of screw rod (23) stretches out end cap (3) back.Adjusting nut just can be regulated the sealing force between elastomer (23) and pump shaft (5).

Claims

1, a kind of Heat-transfer Oil Pump with special seal and radiating structure, comprise the pump housing (10) and pump cover (7) and be installed in pump shaft (5) and the impeller (9) that is positioned at the cavity (13) that the pump housing (10) and pump cover (7) constitute that is connected on the pump shaft (5) on the pump cover (7), on the pump housing (10), connect the import (12) and outlet (11) that are communicated with cavity (13) respectively, pump shaft (5) utilizes Bearing Installation on the support that is connected in the pump cover end face, it is characterized in that forward and reverse automatic compensation filler device (8) being arranged in the contacting point of pump shaft (5) and pump cover (7), in this compensation filler device (8), the gland (14) that is enclosed within on the pump shaft (5) is connected on the pump cover (7), uniform screw rod (18) and nut (15) on gland, this screw rod stretches into the cavity that is positioned at pump cover (7) and pump shaft (5) formation, and be enclosed within the expanded graphite packing ring (17) of pump shaft (5) outside, an end of going up the band taper type at screw rod (18) is provided with base ring (19).

2, pump according to claim 1 is characterized in that also placing the dish spring (20) that is enclosed within pump shaft (5) outside between base ring (19) and pump cover (7), and gland (14) utilizes bolt (16) to be connected on the pump cover (7).

3, pump according to claim 1, it is characterized in that support is a bearing support (4) that has lubricant oil (1), pump shaft (5) utilizes bearing (6) to be installed in the top of bearing support (4), on bearing support (4), be provided with liquid filling hole and liquid feeding plug, radiating fin (26) arranged at bearing support (4) outer wall.

4, pump according to claim 1, it is characterized in that the support outer end connects end cap (3), this end cap (3) has the sealing seat (2) that is enclosed within pump shaft (5) outside with the contacting point of pump shaft (5), in sealing seat (2), the end that screw rod (23) is gone up the band taper type is with base ring (21), the elastomer (24) that is enclosed within pump shaft (5) outside is arranged between base ring (21) and end cap (3), and the outer end of screw rod (23) is stretched out end cap (3) back and is cooperated with nut (22).